JP2016073913A - Spacer for rotary cutter, and crusher including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spacer for a rotary cutter capable of adjusting easily the size of a clearance between the rotary cutter and the spacer, and to provide a crusher including the same.SOLUTION: An annular spacer 10 for a rotary cutter, provided between a plurality of rotary cutters 3 attached to revolving shafts 1, 2, has a constitution including an annular base 11 fitted to the revolving shafts 1, 2, and an outer peripheral part 13 attached to the outer periphery of the base 11 and disposed annularly, and comprising a plurality of division pieces 12 disposed on the outside in the radial direction detachably respectively.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a spacer for a rotary blade and a crusher provided with the spacer.

  Conventionally, a crusher has been used as a means for crushing plastic, wood, paper, metal, rubber, fiber, leather and the like. Further, in this type of crusher A, for example, as shown in FIG. 8, rotating shafts 1 and 2 that rotate about axes O1 and O2 (T1 direction and T2 direction in the figure) and rotating shafts 1 and 2 are provided. A plurality of rotary blades 3 inserted into the center hole 3a and fitted to the rotary shafts 1 and 2 and rotated around the axes O1 and O2 together with the rotary shafts 1 and 2, and the rotary shafts 1 and 2 And a plurality of spacers 4 that are interposed between the rotary blades 3 adjacent to each other in the directions of the axes O1 and O2 and define the interval between the adjacent rotary blades 3.

  For example, a twin-screw crusher (multi-shaft crusher) A is frequently used as a crusher used for crushing general waste or industrial waste. That is, a plurality of crushing mechanisms composed of rotary shafts 1 and 2, a plurality of rotary blades 3 and a plurality of spacers 4 are provided, the axes O1 and O2 of the rotary shafts 1 and 2 of these crushing mechanisms are parallel to each other, and A crusher A is used in which the rotating blades 3 are arranged in a staggered manner so that a part of the rotating blade 3 overlaps in the directions of the axes O1 and O2 (see, for example, Patent Document 1 and Patent Document 2).

  In addition, the biaxial crusher A is generally arranged in the lateral direction of a rotary blade 3 mounted on one adjacent rotary shaft 2 (1) and a conventional spacer 4 mounted on the other rotary shaft 1 (2). The size of the gap H is set and designed according to the size of the object to be crushed and the size of the crushed object.

  In addition, a crusher in which a part of a spacer is detachably divided so as to easily perform a replacement operation of a rotary blade has been proposed and put into practical use (see, for example, Patent Document 3 and Patent Document 4).

Japanese Patent No. 2850999 JP-A-10-180131 Japanese Patent No. 2902374 Japanese Patent No. 3623187

  However, in the conventional two-shaft crusher, if the gap between the rotary blade and the spacer is constant, not only the crushed size is limited, but also the crushing object is caught in the gap and the crushing load is reduced. Increases, and an excessive load is applied to a driving device such as an electric motor that rotates the rotating shaft, and the rotating shaft rotates more frequently. Then, when the object to be crushed is processed in such a state where a large crushing load is generated, the processing time increases and the amount of processing per hour decreases.

  On the other hand, in order to eliminate this inconvenience, it is necessary to adjust the gap between the rotary blade and the spacer. In the conventional two-shaft crusher, the main body of the crusher is disassembled when adjusting the gap. Thus, it is necessary to remove the spacer and the rotary blade from the rotary shaft, replace the entire spacer, and change the blade diameter of the rotary blade. That is, it is necessary to disassemble the rotating shaft and the main body, and it is necessary to remove a large number of spacers and rotating blades, so much labor, time, and expense are generated in the replacement work, and the operation is stopped during the equipment maintenance period.

  Moreover, in order to change the size of the gap, it is necessary to prepare various spacers and rotary blades having different specifications (sizes) in advance.

  The rotary blade spacer of the present invention is an annular rotary blade spacer provided between a plurality of rotary blades attached to a rotary shaft, and an annular base portion fitted into the rotary shaft, and an outer periphery of the base portion And an outer peripheral portion composed of a plurality of divided pieces that are detachably disposed on the outer side in the radial direction.

  In the rotary blade spacer of the present invention, the radial distance from the center to the outer peripheral edge of the outer peripheral portion may be changed in the circumferential direction.

  Moreover, in the spacer for rotary blades of this invention, it has the fixing | fixed part for fixing the said division | segmentation piece to the outer periphery of the said base, The said fixing | fixed part accesses from the radial direction outer side, and fixes the said division | segmentation piece to the said base. It is desirable to be configured as described above.

  Furthermore, in the rotary blade spacer of the present invention, it is provided with a detaching part for detaching the divided piece from the base, and the detaching part is accessed from the outside in the radial direction so as to detach the divided piece from the base. More preferably it is configured.

  The crusher of the present invention includes a plurality of rotating shafts arranged in parallel with a predetermined interval and parallel to each other, and a plurality of shafts fixed to each rotating shaft in a state in which the axes are arranged coaxially. In a crusher comprising a rotary blade and a spacer that is fixed to each rotary shaft and disposed between the rotary blades adjacent to each other in the axial direction, including any one of the above-described rotary blade spacers Features.

  In the spacer for a rotary blade and the crusher of the present invention, the rotary blade spacer includes a base portion fitted on the rotary shaft, and an outer peripheral portion made up of a plurality of divided pieces attached to the outer periphery of the base portion. Since the divided piece is detachable from the base (can be divided), the size of the spacer (the radial dimension of the axis center of the rotating shaft) can be easily adjusted by replacing the divided piece. .

  Thereby, if this spacer for rotary blades is applied to a two-shaft crusher (multi-shaft crusher), it is only necessary to replace one divided piece with another divided piece having a different size, and to rotate one adjacent rotating shaft. The size of the lateral gap between the rotary blade attached to the spacer and the spacer attached to the other rotary shaft can be easily adjusted.

  That is, it is possible to adjust the gap between the rotary blade and the spacer without disassembling the main body of the crusher and removing the entire spacer or the rotary blade from the rotary shaft as in the past. It becomes possible to do.

  Since the gap between the rotary blade and the spacer can be easily adjusted in this way, it can be set flexibly according to the size and material of the crushed object, and the object to be crushed bites into the gap. Therefore, it is possible to eliminate conventional inconveniences such as a crushing load (load of a driving device such as an electric motor) is increased, a processing time is increased, and a processing amount per hour is reduced. It becomes possible.

It is a side view which shows a crusher. It is a X1-X1 arrow view of FIG. 1, and is a top view which shows a crusher. It is a figure which shows the spacer for rotary blades and crusher which concern on 1st Embodiment of this invention. It is a figure which shows the example of a change of the spacer for rotary blades and the crusher which concern on 1st Embodiment of this invention. It is a X1-X1 arrow directional view of FIG. 4, and is a figure which shows the contact part and step part of the spacer for rotary blades of FIG. It is a figure which shows the spacer and crusher for rotary blades concerning 2nd Embodiment of this invention. It is a figure which shows the example of a change of the spacer for rotary blades and crusher which concerns on 2nd Embodiment of this invention. It is a figure which shows the spacer and crusher for the conventional rotary blade.

  Hereinafter, a spacer for a rotary blade and a crusher according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3.

  First, the crusher B of the present embodiment is a two-shaft crusher (multi-shaft crusher) used for crushing large-scale crushing objects such as general waste and industrial waste. As shown in FIG. 2, the apparatus includes a plurality of crushing mechanisms including rotating shafts 1 and 2, a plurality of rotating blades 3, and a plurality of spacers 10. Further, the rotary blades 3 are arranged in a staggered manner so that the axes O1 and O2 of the rotary shafts 1 and 2 of the crushing mechanism are parallel to each other and a part of the rotary blades 3 overlaps with each other in the directions of the axes O1 and O2. Wastes and the like can be sheared and crushed by rotating the rotary blade 3 around the axes O1 and O2 together with the rotary shafts 1 and 2 of each crushing mechanism.

  In the present embodiment, as shown in FIG. 3 (and FIG. 2), the rotary shafts 1 and 2 are formed in a polygonal cross section (hexagonal shape, quadrangular shape, etc.), and the axes O1 and O2 are driven by a driving device 5 such as an electric motor. Rotate around (T1 direction, T2 direction).

  Further, the rotary blade 3 is inserted into the polygonal center hole 3a with the rotary shafts 1 and 2 fitted therein, and is fixed to the rotary shafts 1 and 2 with their respective axes coaxially arranged. 6 and a cutting blade portion 7a arranged radially outside the centers of the axes O1 and O2 and detachably attached to the outer periphery of the blade support 6, and a plurality of them are arranged in parallel in the circumferential direction around the centers of the axes O1 and O2. A crushing blade 7 is provided.

  On the other hand, the spacer 10 for the rotary blade of this embodiment is provided between the rotary blades 3 that are attached to the rotary shafts 1 and 2 and are adjacent to each other in the directions of the axes O1 and O2, and defines the interval between the rotary blades 3. An annular base 11 fitted to the rotary shafts 1 and 2; a ring-shaped base 11 which is attached to the outer periphery of the base 11 in the circumferential direction and arranged in an annular shape; and radially outward of the centers O1 and O2 of the rotary shafts 1 and 2 The outer peripheral part 13 which consists of the some division | segmentation piece 12 each arrange | positioned so that attachment or detachment is possible is comprised.

  The base portion 11 is inserted through and fitted into the polygonal center hole 10a, and is fixed to the rotary shafts 1 and 2 with their respective axes coaxially arranged. In the outer peripheral portion 13, each divided piece 12 is formed in a circular arc plate shape having the same shape and the same size, and in this embodiment, a circular outer peripheral surface, an inner peripheral surface (a substantially circular shape of the divided piece 12 contacting the outer peripheral surface of the base portion 11). It is formed with an arcuate abutment 12a).

  Further, the spacer 10 of the present embodiment includes a fixing portion 15 for fixing the divided piece 12 to the outer periphery of the base portion 11, and the fixing portion 15 is accessed from the outside in the radial direction to fix the divided piece 12 to the base portion 11. Is configured to do.

  Specifically, the fixing portion 15 of the present embodiment includes a bolt insertion hole 15a that is recessed in the radial direction from the outer peripheral surface of the base portion 11, and a bolt insertion hole that is formed through the inner surface from the outer peripheral surface of the split piece 12. 15b, and a fixing bolt 15c for detachably fixing the divided piece 12 at a predetermined position on the outer peripheral edge of the base 11 by being screwed through the bolt insertion holes 15a and 15b of the base 11 and the divided piece 12. It is configured.

  Further, in the spacer 10 of the present embodiment, as the other fixing portion 16, for example, circular hole pin holes 16a and 16b respectively recessed at predetermined positions of the outer peripheral edge of the base portion 11 and the contact portion 12a of the split piece 12. And cylindrical holes 16c having substantially the same diameter as the pin holes 16a and 16b.

  And the one end part side of the pin 16c formed separately with the base part 11 and the division | segmentation piece 12 is fitted to the pin hole 16b of the division | segmentation piece 12, and the other end part side of the pin 16c with the division | segmentation piece 12 is a pin hole of the base part 11 The split piece 12 is attached to the base 11 by fitting with 16a.

  Further, the pin 16c is fitted into the pin hole 16a of the base portion 11, the contact portion 12a of the split piece 12 is in close contact with the outer peripheral edge of the base portion 11, and the end faces facing the circumferential direction of the adjacent split pieces 12 are in surface contact. And engage.

  By providing the pin 16c in this manner, the divided piece 12 is positioned with respect to the base portion 11, and the movement of the divided piece 12 in the circumferential direction is restricted. Further, when the pin 16c is fitted into the pin holes 16a and 16b, the movement of the split piece 12 in the axis O1 and O2 directions (thickness direction) with respect to the base portion 11 is restricted. Therefore, it is possible to arrange and attach the segment 12 at a predetermined position of the base 11 while positioning the segment 12 by simply fitting the pin 16c into the pin holes 16a and 16b. Further, it can be easily fixed with the fixing bolt 15c.

  Furthermore, the spacer 10 of the present embodiment includes a detaching portion 18 for detaching the divided piece 12 from the base portion 11, and the detaching portion 18 is accessed from the outside in the radial direction so as to detach the divided piece 12 from the base portion 11. It is configured.

  Specifically, the detachment portion 18 of the present embodiment includes an insertion hole 18a that is recessed from the outer peripheral surface to the inner surface of the divided piece 12, releases the fixed state by the fixing portion 15, and pulls the extraction rod into the insertion hole 18a. The split piece 12 can be easily detached from the base 11 by fitting and pulling in the radial direction.

  The detaching portion 18 has the above-described insertion hole 18a formed so as to penetrate the split piece 12, and the insertion hole 18a is threaded with a female screw, and is pulled with a male screw such as a bolt. You may comprise so that a division | segmentation piece 12 may be lifted up by the screw | thread feeding and screw | threads. By configuring in this way, it is possible to easily cope with the case where the divided piece 12 is difficult to be detached. The bolt insertion hole 15b (15a) of the fixing portion 15 may also be used as the insertion hole 18a to constitute the detachment portion 18.

  And in the spacer 10 for rotary blades of this embodiment comprised as mentioned above and the crusher B provided with this, as shown to FIGS. 1-3, for example, the one adjacent rotating shaft 1 is made low-speed. When the other rotating shaft 2 is rotated in the other direction (T2 direction) at a high speed in one direction (T1 direction), and the crushing object is introduced from the crushing object input port 19 opened directly above these rotating shafts 1 and 2. The object to be crushed is crushed by the rotary blade 3 fitted to one rotary shaft 1 and the rotary blade 3 fitted to the other rotary shaft 2.

  Further, the gap H between the spacer 10 fitted to one rotary shaft 1 and the rotary blade 3 fitted to the other rotary shaft 2 and the spacer 10 fitted to the other rotary shaft 2 and one of them. The object to be crushed enters the gap H between the rotary blades 3 fitted to the rotary shaft 1, and the object to be crushed is crushed by the rotary blade 3 to a size corresponding to the size of the gap H, and the crushing process is performed. It falls down as an object.

  On the other hand, in the rotary blade spacer 10 and the crusher B of the present embodiment, the rotary blade spacer 10 is fitted to the rotating shafts 1 and 2 and a plurality of bases 11 attached to the outer periphery of the base portion 11. The outer peripheral part 13 which consists of the division | segmentation piece 12 is provided, and each division | segmentation piece 12 which forms the outer periphery of the spacer 10 is detachable from the base 11 (it can divide | segment). Therefore, the size of the spacer 10 (the maximum dimension in the radial direction of the axes O1 and O2 of the rotary shafts 1 and 2) can be easily adjusted by replacing the divided piece 12 with another divided piece 12 having a different size. can do.

  Thus, the size of the horizontal gap H between the rotary blade 3 and the spacer 10 attached to the adjacent rotary shafts 1 and 2 can be easily increased or decreased simply by replacing the divided piece 12 with a divided piece 12 having a different size. It becomes possible to adjust.

  That is, the gap H between the rotary blade 3 and the spacer 10 can be adjusted without disassembling the main body of the crusher A and removing the spacer and the rotary blade 3 from the rotary shafts 1 and 2 as in the prior art. Adjustment of H can be performed remarkably efficiently.

  And since the clearance gap H between the rotary blade 3 and the spacer 10 can be adjusted easily in this way, the size of a crushing processed material can be set flexibly, and the crushing object bites into the clearance gap H and crushes. It is possible to eliminate conventional inconveniences such as an increase in load (load of the driving device 5 such as an electric motor), an increase in processing time, and a decrease in processing amount per hour, and suitable crushing processing work can be performed. It becomes possible.

  In addition, the rotary blade spacer 10 and the crusher B according to the present embodiment include a fixing portion 15 for fixing the divided piece 12 to the outer periphery of the base portion 11, and the fixing bolt 15c from the radially outer side to the bolt insertion hole 15a. , 15b and screwed (accessed) to fix the segment 12 to the base 11. For this reason, it is possible to easily and individually install the split pieces 12 at predetermined positions by operating the fixing bolts 15c, and to separate and remove them from the base portion 11.

  Further, a separation portion 18 for detaching the split piece 12 from the base portion 11 is provided, and the separation portion 18 includes an insertion hole 18 a formed in the base portion 11. For this reason, the split piece 12 can be easily detached from the base portion 11 by inserting (accessing) the pulling rod into the insertion hole 18a from the outer side in the radial direction and pulling it outward.

  Further, in the rotary blade spacer 10 and the crusher B according to the present embodiment, the pin 11 c is split while fitting the pin 16 c into the pin holes 16 a and 16 b of the outer periphery of the base 11 and / or the abutting portion 12 a of the split piece 12. Positioning can be performed by attaching the piece 12 to the base 11. Thereby, when attaching the division | segmentation piece 12 to the base 11, positioning of the circumferential direction of the division | segmentation piece 12, an axis line O1, O2, and a height direction (front and back, right and left, height) can be performed easily and accurately. It becomes possible to eliminate the need for the centering work.

  In addition, the split piece 12 can be attached easily and with high accuracy as described above, and the split piece 12 is connected to the base 11 by the pin 16c. Therefore, the pin 16c and the pin holes 16a and 16b can be used for crushing in a large area. It can receive the crushing thrust force which acts. Thereby, even if the spacer has a divided structure, the divided piece 12 can be held in a stable state, and the product quality can be greatly improved.

  Furthermore, just by fitting the pin 16c into the pin holes 16a and 16b, the alignment of the segment 12 and the base 11 (the contact portion 12a, outer periphery) can be easily aligned, the mounting accuracy is good, and the mounting position It doesn't take time to match.

  Furthermore, the pin holes 16a and 16b and the pin 16c can be formed independently, and the base 11, the split piece 12 and the pin 16c can be formed and manufactured separately.

  As mentioned above, although 1st Embodiment of the spacer for rotary blades which concerns on this invention, and the crusher provided with the same was described, this invention is not limited to said 1st Embodiment, It does not deviate from the meaning. The range can be changed as appropriate.

  For example, in the present embodiment, the outer periphery of the base 11 is formed in a circular shape. However, as shown in FIG. 4, the outer periphery of the base 11 is formed in a polygonal shape, and the inner surface of the divided piece 12 is planar. It may be formed.

  Also, as shown in FIGS. 4 and 5A, the circumferential direction (substantially circumferential direction) of the centers of the axes O1 and O2 is applied to the outer periphery of the base portion 11 and the contact portion 12a of the segment 12 that contacts the outer periphery of the base portion 11. Stepped portions 20 and 21 having engaging surfaces 20a and 21a that engage with each other in surface contact with each other may be formed.

  In this case, the circumferential direction positioning of each divided piece 12 is performed only by engaging the stepped portions 20 and 21 that are brought into surface contact with each other on the outer periphery of the base portion 11 and the contact portion 12a of the divided piece 12. Can do. Therefore, the provision of the step portions 20 and 21 facilitates the positioning of the divided piece 12 in the circumferential direction, the axial direction, and the height direction (front and rear, left and right, height) when attaching the divided piece 12 to the base 11. It is possible to carry out with high accuracy and to eliminate the need for the centering work.

  Further, the stepped portions 20 and 21 (engaging surfaces 20a and 21a of the stepped portions 20 and 21) can receive a crushing thrust force acting at the time of crushing in a large area. Thereby, even if the spacer has a divided structure, the divided piece 12 can be held in a stable state, and the product quality can be greatly improved.

  Further, as shown in FIGS. 4 and 5B, the engaging surfaces 20a and 21a of the stepped portions 20 and 21 gradually protrude or dent in the circumferential direction toward the center in the thickness direction in the directions of the axes O1 and O2, respectively. You may form in a taper shape. In this case, the stepped portion 21 of the divided piece 12 is engaged with the stepped portion 20 of the base 11, and the divided piece 12 is guided and positioned to a predetermined position by the tapered engagement surfaces 20a and 21a. be able to. Thereby, the division | segmentation piece 12 can be positioned and attached to the base 11 more easily and with high precision.

  In the present embodiment, the pin holes 16a and 16b are formed as circular holes and the pin 16c is formed in a columnar shape. However, the pin 16c and the pin holes 16a and 16b are formed on the divided piece 12 with respect to the base 11. It is only necessary to be formed so as to be able to restrict movement in at least the directions of the axes O1 and O2. For example, the pin hole may be a groove or the pin may be formed in a plate shape.

  In the present embodiment, the pin 16c is formed separately from the base 11 and the divided piece 12. However, the pin 16c is provided integrally with the base 11 or the divided piece 12 in advance, and the base 11 or the divided piece 12 is provided. May be formed. Even in this case, it is possible to obtain the same effect as that of the present embodiment.

  Furthermore, at least one pin hole 16a (formed in the base 11 and the split piece 12 so that a gap is formed between the pin 16c and the circumferential direction of the pin holes 16a and 16b with the pin 16c fitted. 16b) may be formed in a long hole shape.

  In this case, for example, one end portion of the pin 16c is fitted into the pin hole 16b of the divided piece 12, and the other end portion of the pin 16c together with the divided piece 12 is replaced with the long hole-like pin hole 16a of the base portion 11. The end side is fitted, and the contact portion 12a of the split piece 12 is brought into close contact with the outer peripheral edge of the base portion 11. Thereby, the pin 16c fits into the pin holes 16a and 16b, so that the divided piece 12 can be arranged and attached at a predetermined position of the base 11 while positioning.

  In the present embodiment, the spacer 10 is provided with the detaching portion 18. However, for example, the split piece 12 may be attached and detached using a magnet.

  In addition, the rotation shafts 1 and 2, and thus the center holes 3 a and 10 a of the rotary blade 3 and the spacer 10 are formed not in a polygonal cross section but in a substantially circular cross section and engaged with a recess formed in the inner peripheral surface of the base 11. You may form with a protrusion (key).

  Next, a spacer for a rotary blade and a crusher according to a second embodiment of the present invention will be described with reference to FIGS. Here, the present embodiment is different from the first embodiment in the configuration of the split piece of the spacer for the rotary blade, and other configurations can adopt the same configuration as the first embodiment. is there. For this reason, in this embodiment, the same code | symbol is attached | subjected about the structure similar to 1st Embodiment, and the detailed description is abbreviate | omitted.

  First, the crusher C of this embodiment is a biaxial crusher as in the first embodiment. As shown in FIGS. 1 and 2, the rotary shafts 1 and 2, the plurality of rotary blades 3, and the plurality of crushers It is provided with a plurality of crushing mechanisms composed of spacers 25, and rotates so that the axes O1 and O2 of the rotary shafts 1 and 2 of the crushing mechanism are parallel to each other and part of the rotary blades 3 overlap each other in the directions of the axes O1 and O2. Even the blades 3 are arranged in a staggered pattern.

  On the other hand, as shown in FIG. 6, the spacer 25 for a rotary blade of the present embodiment is formed by changing the radial distance from the center (O1, O2) to the outer peripheral edge of the outer peripheral portion 13 in the circumferential direction. Yes.

  Specifically, in the present embodiment, the plurality of divided pieces 26 forming the outer peripheral portion 13 are formed in the same shape and the same size, and the outer peripheral edge of the divided pieces 26 is a concentric circle centered on the central axis of the spacer 25. It is formed in an arc shape having a smaller curvature than the curvature. Thereby, the outer peripheral part 13 formed by arranging a plurality of divided pieces 26 in an annular shape on the outer periphery of the base part 11 is formed such that the radial distance from the center to the outer peripheral edge of the outer peripheral part 13 changes in the circumferential direction. .

  For this reason, in the spacer 25 for rotary blades of this embodiment and the crusher C equipped with the spacer 25 having the above-described configuration, one adjacent rotary shaft 1 is set in one direction (T1 direction), and the other rotary shaft 2 is set. When rotating in the other direction (T2 direction), the size of the gap H between the cutting edge portion 7a of the rotary blade 3 and the outer periphery of the spacer 25 corresponds to the change in the radial distance to the outer peripheral edge of the outer peripheral portion 13. Change.

  Thereby, the crushing processed material can be produced | generated by the magnitude | size according to the size when the clearance gap H between the cutting-blade part 7a of the rotary blade 3 and the outer periphery of the spacer 25 is the smallest. Further, when the gap H between the cutting edge portion 7a of the rotary blade 3 and the outer periphery of the spacer 25 is the smallest, the cutting edge portion 7a of the rotary blade 3 bites into the crushing object entering the gap H, and the crushing object. However, since both rotary shafts 1 and 2 are rotating, the gap H between the cutting edge portion 7a of the rotary blade 3 and the outer periphery of the spacer 25 immediately increases from the minimum state. For this reason, it is possible to reduce the load on the driving device 5 such as an electric motor, and to make it difficult to generate a reverse operation.

  Therefore, in the spacer 25 for rotary blades of this embodiment and the crusher C provided with the same, the effect of the first embodiment is achieved, and the load on the drive device 5 is reduced, and the object to be crushed is suitably obtained. Can be crushed.

  As mentioned above, although 2nd Embodiment of the spacer for rotary blades concerning this invention and the crusher provided with this was described, this invention is not limited to said 2nd Embodiment, The change of 1st Embodiment Changes can be made as appropriate without departing from the spirit of the invention, including examples.

  For example, in the present embodiment, the outer peripheral edge of each divided piece 26 is formed in an arc shape having a curvature smaller than the curvature of the concentric circle with the central axis of the spacer 25 as the center. It is assumed that the radial distance from the center of the outer peripheral portion 13 formed in a ring shape to the outer periphery of the outer periphery of the outer periphery of the outer peripheral portion changes in the circumferential direction.

  On the other hand, the spacer 25 for the rotary blade according to the present embodiment only needs to be formed by changing the radial distance from the center to the outer peripheral edge of the outer peripheral portion 13 in the circumferential direction. The outer periphery of 13 may be formed in an elliptical shape.

  Further, a convex portion 26a is provided, for example, as shown in FIG. 7, a split piece 26 is formed like the cutting blade portion 7a of the rotary blade 3, or a convex portion regularly arranged on the outer periphery of the outer peripheral portion 13 is provided. 25 may be formed like a gear. And when the convex part 26a is provided in this way, this convex part 26a acts like the cutting edge part 7a, and crushes the object to be crushed between the convex part 26a and the cutting edge part 7a of the rotary blade 3. In doing so, a large shearing force can be applied to the object to be crushed by the convex portion 26a. Thereby, it becomes possible to crush the crushing object more efficiently.

  Moreover, when the convex part 26a is provided in this way, depending on the shape of the convex part 26a, force is also applied to each divided piece 26 in the rotational direction T1 (T2) during crushing. For this reason, it is desirable to form the step parts 20 and 21 provided with the engaging surface 20a which faces the rotation direction back side in the outer periphery of the base 11, and the engagement surface 21a which faces the rotation direction front side on the split piece 26.

  Further, when one rotary shaft 1 is rotated at a low speed and the other rotary shaft 2 is rotated at a high speed to make a rotational difference between the rotary shafts 1 and 2, the convex portion 26 a is formed on the spacer 25 of the rotary shaft 1 on the low speed side. If provided, the cutting blade portion 7a of the rotary blade 3 of the rotary shaft 2 on the high-speed side can be reliably opposed to the single convex portion 26a during rotation (one convex portion 26a is provided on the rotary blade 3). The convex part 26a and the cutting blade part 7a can be relatively rotated so as to receive the cutting blade part 7a). Thereby, a crushing object can be crushed efficiently reliably.

DESCRIPTION OF SYMBOLS 1 Rotating shaft 2 Rotating shaft 3 Rotating blade 3a Center hole 4 Conventional spacer 5 Driving device 6 Blade receiving base 7 Crushing blade 7a Cutting blade portion 10 Spacer 11 Base portion 12 Split piece 12a Abutting portion 13 Outer portion 15 Fixing portion 15a Bolt insertion Hole 15b Bolt insertion hole 15c Fixing bolt 16 Fixing part 16a Pin hole 16b Pin hole 16c Pin 18 Detachment part 18a Insertion hole 20 Step part 20a Engagement surface 21 Step part 21a Engagement surface 25 Spacer 26 Split piece 26a Protrusion A Conventional Crusher B Crusher C Crusher O1 Axis O2 of rotation axis T1 Axis of rotation axis T1 Rotation direction T2 Rotation direction H Clearance

Claims (5)

An annular rotary blade spacer provided between a plurality of rotary blades attached to a rotary shaft,
An annular base fitted into the rotating shaft;
A rotating blade comprising: an outer peripheral portion which is attached to the outer periphery of the base portion and arranged in an annular shape, and an outer peripheral portion made up of a plurality of divided pieces which are detachably arranged on the outer sides in the radial direction. Spacer. The spacer for a rotary blade according to claim 1,
A rotary blade spacer, characterized in that a radial distance from the center to the outer peripheral edge of the outer peripheral portion is changed in the circumferential direction. In the spacer for rotary blades according to claim 1 or 2,
A fixing portion for fixing the divided piece to the outer periphery of the base portion;
A rotary blade spacer, wherein the fixing portion is configured to be accessed from a radially outer side to fix the divided piece to the base portion. In the spacer for rotary blades according to any one of claims 1 to 3,
A separation part for separating the divided piece from the base part,
A spacer for a rotary blade, wherein the separation part is configured to be accessed from the outside in the radial direction to separate the divided piece from the base part. A plurality of rotation axes arranged in parallel with each other in parallel with a predetermined interval,
A plurality of rotary blades fixed to each rotary shaft in a state in which the respective axes are arranged coaxially;
In a crusher comprising a spacer fixed between each rotary shaft and disposed between the rotary blades adjacent in the axial direction,
The crusher provided with the spacer for rotary blades as described in any one of Claims 1-4.

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