JP2015073965A - Crusher - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a crusher which can shorten a time required for exchange of a striking plate.SOLUTION: Paired protectors respectively have at least one protector side projection which extends along an axial direction of a main shaft, and an axis side projection which is provided on the axis side further than the protector side projection and which extends along an axial direction of the main shaft. Further, both longitudinal side faces of a striking plate are provided with at least one striking plate side projection which extends along the axial direction of the main shaft and can be disposed at a position between the protector side projection and the axis side projection of the protector. A length of the striking plate side projection of the striking plate in the axial direction of the main shaft is smaller than a clearance in the axial direction of the main shaft between the protector side projection of the protector attached to one rotor disk and the protector side projection of the protector attached to other rotor disk adjacent to the one rotor disk.

Description

  The present invention relates to a crusher that crushes an object such as a rock.

  2. Description of the Related Art Conventionally, a crusher that crushes coal using impact force is known as a crusher for crushing objects such as rocks. For example, in Patent Document 1, a crusher comprising: a horizontal main shaft arranged in a casing; and a plurality of striking plates attached to the outer periphery of a rotor disk fixed to the main shaft through a protector (rotor holder) at equal intervals. A machine is disclosed. In such a crusher, by rotating the rotor disk, the striking plate attached to the rotor disk collides with an object put into the crushing space in the casing. The object can be crushed by the impact force resulting from this collision.

  In such a crusher, as the striking plate brings about a crushing action, the tip of the striking plate is worn. When the tip of the striking plate is worn, the length of the portion of the striking plate protruding into the crushing space is reduced, and the rotation radius at the tip of the striking plate is also reduced. Therefore, the crushing efficiency in the crusher decreases with wear of the striking plate. For this reason, it is necessary to recover the length of the portion of the striking plate that protrudes into the crushing space (hereinafter also referred to as “protruding length”) each time a predetermined time elapses. One way to recover is to replace the striking plate with a new one. Moreover, in the above-mentioned Patent Document 1, the worn tip is positioned on the axial center side, that is, the rotor disk side, and the non-weared tip portion is positioned on the outer peripheral side, that is, the crushing space side by turning the striking plate upside down. Thus, it is disclosed that the protruding length of the striking plate is restored. By flipping the striking plate up and down, both ends of the striking plate can be used, so that the usage rate of the striking plate can be increased.

  Patent Document 1 also discloses that the protruding length of the striking plate is recovered by feeding the striking plate to the outer peripheral side. Specifically, in Patent Document 1, protrusions are formed on the striking plate, and the rotor disk is provided with a pair of holding blocks that sandwich the protrusions of the striking plate. Of the pair of holding blocks, the outer peripheral holding block has a larger thickness than the axial center holding block. For this reason, if arrangement | positioning of a pair of holding | maintenance block is replaced, a striking board will be drawn | fed out to the outer peripheral side by the part of the difference of the thickness of two holding | maintenance blocks. In Patent Document 1, the pair of holding blocks are supported by the above-described protector (rotor holder) fixed to the rotor disk.

  Patent Document 2 also discloses that the protruding length of the striking plate is recovered by feeding the striking plate to the outer peripheral side. Specifically, the crusher described in Patent Document 2 is provided with a protector (arm) formed with a guide groove extending along the radial direction of the rotor disk, and inserted into the guide groove of the arm, and orthogonal to the guide groove. A mounting body having a projecting portion projecting from the guide groove in a direction to be mounted, and a striking plate in which a recessed portion fitted to the projecting portion of the mounting body from the outer peripheral side is formed. A plurality of locking recesses are formed in the guide groove of the arm along the radial direction of the rotor disk, and the inner end of the mounting body is fitted into any one of these locking recesses. ing. Further, a plurality of mounting holes arranged at a predetermined arrangement pitch in the radial direction of the rotor disk are formed on the side surface of the guide groove. And, the mounting body integrated with the striking plate is fixed to the arm by aligning the mounting hole formed in the mounting body with the mounting hole of the guide groove of the arm and inserting the pin into each mounting hole. Has been. In such a crusher, by shifting the position of the mounting hole of the guide groove into which the pin is inserted to the outer peripheral side, the striking plate can be fed out to the outer peripheral side by the arrangement pitch of the mounting hole of the guide groove. .

JP 2001-190972 A Japanese Utility Model Publication No. 53-17017

  Generally in a crusher, a hitting board and a protector are heavy. Therefore, it is difficult to manually move or replace the striking plate or protector in order to recover the protruding length of the striking plate. Usually, lifting means such as a chain block or a hoist crane are used. Those work is done. On the other hand, work using the lifting means is generally less efficient than work performed by a human hand. For example, in the work using the lifting means, it takes time to change a component to be moved (hereinafter also referred to as a moving element) and to change the moving direction of the moving element. Therefore, in the operation for recovering the protruding length of the striking plate, it is preferable that the number of moving elements is small and the moving direction of the moving elements is small.

  However, in order to pay out the striking plate to the outer peripheral side in Patent Document 1, the pins for fixing the pair of holding blocks to the rotor disk are removed, and the pair of holding blocks are taken out and turned upside down. It is necessary to fix the pair of holding blocks to the rotor disk again. Further, it is necessary to lift the striking plate using the lifting means during the work of turning the holding block upside down. Furthermore, since the back surface (surface opposite to the surface facing the holding block) of the striking plate is supported by the protective liner, the striking plate is moved in the thickness direction in order to extend the striking plate to the outer peripheral side. It is considered that an operation for releasing the engagement between the striking plate and the protective liner is also required. As described above, in Patent Document 1, since the number of moving elements moved by the lifting means is large and the moving direction is also large, the work for paying out the striking plate is complicated, and therefore the work requires a long time. become.

  In Patent Document 2, in order to extend the striking plate to the outer peripheral side, the pin is removed from the mounting hole of the arm while supporting the mounting body integrated with the striking plate, and then the striking plate and the mounting body are moved to the striking plate. To move the striking plate and the mounting body to the outer peripheral side, and then move the striking plate and the mounting body. Move the body again in the striking plate thickness direction, fit the inner end of the mounting body into the locking recess of the arm shifted by one step, and then insert the pin into the mounting hole of the guide groove and mount the striking plate It is necessary to fix the body to the arm. As described above, also in Patent Document 2, the work for feeding out the striking plate is complicated, and therefore, the work takes a long time.

  In Patent Document 2, a protector (arm) for supporting the striking plate is provided only on one side of the striking plate in the circumferential direction of the rotor disk. By the way, in the process of crushing objects such as rocks, the striking plate collides with the object while rotating at high speed. Therefore, the striking plate receives a great reaction force from the object in the event of a collision. The protector is for stably holding the striking plate even when such a reaction force acts on the striking plate. However, when the protector (arm) is provided only on one side of the striking plate as in Patent Document 2, the striking plate can withstand the reaction force from the object such as a rock. Only when the object collides with the surface opposite to the surface facing the protector. That is, in Patent Document 2, the rotation direction of the rotor disk is limited to one direction, and the operation method of the crusher is limited.

  The present invention has been made in consideration of such points, and an object of the present invention is to provide a crusher capable of shortening the time required for replacing the striking plate and capable of various operations. .

  The present invention is a crusher for crushing an object, which is a main shaft and a plurality of rotor disks fixed to the main shaft and rotating about the main shaft as a rotation axis, and a plurality of grooves are formed on the outer periphery thereof. A plurality of rotor disks, a pair of protectors attached to the grooves of the rotor disk and facing each other, and a striking plate that collides with the object, and both longitudinal sides thereof are sandwiched by the pair of protectors. Each of the pair of protectors is provided on at least one protector side protrusion extending along the axial direction of the main shaft, and on the axial center side of the protector side protrusion, and the shaft of the main shaft An axial center protrusion extending along the direction, and extending along the axial direction of the main shaft on both longitudinal side surfaces of the striking plate, and the protector side protrusion of the protector and the There is provided at least one striking plate-side protrusion that can be disposed at a location between the center-side protrusion, and a plurality of the rotor disks are fixed to the main shaft along the axial direction of the main shaft, The pair of protectors are attached to the grooves of the rotor disk, and the length of the striking plate side protrusion of the striking plate in the axial direction of the main shaft is the length of the protector attached to one rotor disk. The gap between the protector side protrusion and the protector side protrusion of the protector attached to the other rotor disk adjacent to the one rotor disk is smaller than the gap in the axial direction of the main shaft. Therefore, by moving the striking plate in the axial direction of the main shaft, the striking plate in the radial direction of the rotor disk and the The engagement between the protector can be released without moving the pair of protectors are crusher.

  In the crusher according to the present invention, the protector may be provided with a displacement prevention mechanism for preventing the striking plate from being displaced in the axial direction of the main shaft.

  In the crusher according to the present invention, the displacement prevention mechanism includes a protruding piece protruding from the protector in a direction horizontal to the main shaft, a hole formed in the protruding piece, and a rod-like support inserted into the hole. And a hole into which the support of the displacement prevention mechanism is inserted may be formed on the surface of the striking plate.

  According to the crusher of this invention, in the operation | work for recovering the protrusion length of a striking board, the number of moving elements can be decreased and the moving direction of a moving element can be decreased. For this reason, the time required for replacement | exchange of a striking board can be shortened. Thereby, the time and cost required for maintenance of the crusher can be reduced.

FIG. 1 is a front view showing a crusher according to a first embodiment of the present invention. FIG. 2 is a diagram showing an assembly of the crusher of FIG. FIG. 3A is an enlarged front view showing the rotor disk of FIG. 1. FIG. 3B is a front view showing a modification of the rotor disk. FIG. 4A is a diagram for explaining the positional relationship between a pair of protectors and a striking plate held between the pair of protectors. FIG. 4B is a diagram for explaining a displacement prevention mechanism for preventing displacement of the striking plate in a direction parallel to the main axis. 5A (a) to 5 (d) are diagrams showing a method of using a striking plate according to the first embodiment. FIGS. 5B (a) and 5 (b) are diagrams for explaining the difference in the moving direction of the object based on the difference in the end shape on the outer peripheral side of the striking plate. FIGS. 6A to 6D are views for explaining a procedure of pulling out the striking plate upward in the first embodiment. FIG. 7 is an enlarged front view showing a rotor disk according to a second embodiment of the present invention. FIGS. 8A to 8D are views for explaining a procedure for pulling the striking plate upward in the second embodiment. FIG. 9 is an enlarged front view showing a rotor disk according to a third embodiment of the present invention. FIGS. 10A to 10D are views for explaining a procedure of pulling out the striking plate upward in the third embodiment.

First Embodiment Hereinafter, a crusher according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 6 (a) to (d).

(Crushing machine)
FIG. 1 is a front view showing the crusher 10. In FIG. 1, a cross section when the crusher 10 is cut along a plane orthogonal to the axial direction of the main shaft 18 of the crusher 10 is shown. The crusher 10 applies an impact force to an object 13 that is input into a crushing space 14 inside the casing 11 from an input port 12 formed in the casing 11, thereby crushing the object 13.

  The crusher 10 includes a main shaft 18 that extends in the horizontal direction, and a rotor disk 20 that is fixed to the main shaft 18 and rotates about the main shaft 18 as a rotation axis. As shown in FIG. 1, a plurality of grooves 21 are formed at equal intervals in the circumferential direction on the outer periphery of the rotor disk 20. The crusher 10 further includes a pair of protectors 31 and 32 that are attached to the groove 21 of the rotor disk 20 and face each other, and a striking plate 40 that is sandwiched between the pair of protectors 31 and 32. The striking plate 40 collides with the object 13 and gives an impact force to the object 13 when the rotor disk 20 rotates.

  The number of striking plates 40 attached to the outer periphery of the rotor disk 20 is not particularly limited. For example, although not shown, six striking plates 40 may be fixed to the outer periphery of the rotor disk 20 at equal intervals.

  Around the rotor disk 20, a collision plate 15 for colliding the object 13 after being given an impact force by the striking plate 40 is disposed. In this case, the object 13 is further given an impact force by the collision with the collision plate 15, whereby the object 13 is further crushed. A liner 16 having a saw-like shape may be attached to the inner surface of the collision plate 15. Thereby, the object 13 which has come can be crushed more effectively.

(Protector and blow board)
Next, the pair of protectors 31 and 32 and the striking plate 40 attached to the rotor disk 20 will be described in more detail with reference to FIGS. 2 to 4A. 2 is a diagram showing a case where the pair of protectors 31 and 32 and the striking plate 40 of FIG. 1 are viewed along the arrow II of FIG. In FIG. 2, the rotor disk 20 is simplified and shown by a dotted line in order to prevent the figure from becoming complicated. FIG. 3A is an enlarged plan view showing the rotor disk 20 shown in FIG. FIG. 4A is a view for explaining a fitting relationship between the pair of protectors 31 and 32 and the striking plate 40 sandwiched between the pair of protectors 31 and 32. In FIG. 2, the pair of protectors 31 and 32 and the striking plate 40 located at the upper portion in FIG. 1 are omitted for clarity of the drawing.

  As shown in FIG. 2, a plurality of, for example, four rotor disks 20 are fixed to the main shaft 18 at equal intervals in the axial direction, and a pair of protectors 31 and 32 are provided on the outer periphery of each rotor disk 20. The striking plate 40 is fixed. In FIG. 2, the length of the striking plate 40 in the axial direction of the main shaft 18 is larger than the arrangement pitch of the rotor disks 20 in the axial direction of the main shaft 18. Therefore, the striking plate 40 is provided so as to straddle two rotor disks. It has been. However, the length of the striking plate 40 in the axial direction of the main shaft 18 is not particularly limited. For example, the length of the striking plate 40 may be set so that the striking plate 40 straddles four rotor disks, or may be set so that the striking plate 40 can be held by one rotor disk 20. Good.

  As shown in FIG. 3A, the pair of protectors 31 and 32 includes a first protector 31 attached to the first side surface 22 of the groove 21 of the rotor disk 20 and a second protector attached to the second side surface 23 of the groove 21. 32. The first side surface 22 and the second side surface 23 of the groove 21 are side surfaces that face each other in the rotational direction of the rotor disk 20, and therefore, the first protector 31 and the second protector 32 are also mutually in the rotational direction of the rotor disk 20. Opposite. Further, the striking plate 40 is configured such that both longitudinal side surfaces thereof are sandwiched between the pair of protectors 31 and 32. Of the two longitudinal side surfaces of the striking plate 40, the side surface located on the first protector 31 side is referred to as a first side surface 41, and the side surface located on the second protector 32 side is referred to as a second side surface 42.

  The method for attaching the protectors 31 and 32 to the side surfaces 22 and 23 of the groove 21 is not particularly limited. For example, as shown in FIG. 3A, convex portions 22a and 23a may be formed on the side surfaces 22 and 23, respectively, and concave portions 31a and 32a may be formed on the protectors 31 and 32, respectively. In this case, the protectors 31 and 32 can be attached to the side surfaces 22 and 23 of the groove 21 by fitting the convex portions 22a and 23a of the side surfaces 22 and 23 into the recesses 31a and 32a of the protectors 31 and 32, respectively.

  As shown in FIGS. 3A and 4A, each protector 31, 32 is provided on the axial center side of the first protector-side protrusion 33 extending along the axial direction of the main shaft 18 and the first protector-side protrusion 33. , And an axial center projection 34 extending along the axial direction of the main shaft 18. In the present specification, the “axial center side” means a side close to the main shaft 18. That is, “the axial center side protrusion 34 is provided on the axial center side with respect to the first protector side protrusion 33” means that the axial center side protrusion 34 is closer to the main shaft 18 than the first protector side protrusion 33. It means that it is provided at the place. The first protector side protrusion 33 and the axial center side protrusion 34 of the first protector 31 and the first protector side protrusion 33 and the axial center side protrusion 34 of the second protector 32 are substantially the same in the axial direction of the main shaft 18. It extends over the range. That is, the first protector 31 and the second protector 32 have substantially symmetrical shapes.

  Further, as shown in FIGS. 3A and 4A, both longitudinal side surfaces 41 and 42 of the striking plate 40 are positioned in the vicinity of the end 40 a on the axial center side of the striking plate 40 and extend along the axial direction of the main shaft 18. A first striking plate side projection 43 and a second striking plate side projection 44 that are located on the outer peripheral side of the first striking plate side projection 43 and extend along the axial direction of the main shaft 18 are provided. . Here, “the end 40a on the axial center side” means an end located on the main shaft 18 side of the two end portions of the striking plate 40 in the direction from the main shaft 18 toward the striking plate 40. Further, as will be described later, an end portion of the two end portions of the striking plate 40 that is located at a position where the distance from the main shaft 18 is larger may be referred to as an “outer end portion 40b”. Further, “in the vicinity of the end 40a on the axial center side” means that the first striking plate side protrusion 43 is provided at a position where the usage rate of the striking plate 40 can be increased as much as possible. I mean. For example, the distance from the first striking plate side protrusion 43 to the end 40a on the axial center side of the striking plate 40 in the radial direction of the rotor disk 20 is the length of the new striking plate 40 in the radial direction of the rotor disk 20. 1/3 or less. Further, in this specification, the “outer peripheral side” means a side away from the main shaft 18. That is, “the second striking plate side protrusion 44 is positioned on the outer peripheral side of the first striking plate side projection 43” means that the second striking plate side projection 44 is more than the first striking plate side projection 43. Is also located at a location far away from the main shaft 18.

  Next, the action or function of the protector-side protrusions of the protectors 31 and 32 and the striking plate-side protrusion of the striking plate 40 will be described. In the present specification, the “protector-side protrusion” means that the striking plate-side protrusion of the striking plate 40 comes into contact with the striking plate-side projection from the outer peripheral side when centrifugal force is acting on the striking plate 40 due to the rotation of the rotor disk 20. These are projections provided on the protectors 31 and 32. Further, the “striking plate side protrusion” means that when the centrifugal force is acting on the striking plate 40 due to the rotation of the rotor disk 20, the protector side projection of each of the protectors 31 and 32 comes into contact with the shaft side. It is a protrusion provided on both longitudinal side surfaces 41 and 42 of the striking plate 40. By providing these “protector side protrusion” and “striking plate side projection”, it is possible to prevent the striking plate 40 from jumping to the outer peripheral side when the rotor disk 20 is rotating, and the position of the striking plate 40 can be changed. Can be determined. The specific structures of the protector side protrusion and the striking plate side protrusion are not particularly limited as long as they can be engaged with each other in the radial direction of the rotor disk 20, but for example, the protector side protrusion and the striking plate side protrusion are both trapezoidal. It has the shape of

  Next, the action or function of the axial projections of the protectors 31 and 32 will be described. While the centrifugal force is acting on the striking plate 40 due to the rotation of the rotor disk 20, the striking plate-side protrusions of the striking plate 40 abut on the protector-side protrusions of the protectors 31, 32 as described above. On the other hand, since the centrifugal force does not act on the striking plate 40 while the rotor disk 20 is not rotating, the striking plate 40 located above the main shaft 18 in the striking plate 40 has an axial center caused by gravity. A force toward the side acts. With respect to the striking plate side protrusion of the striking plate 40, the axial center side projections of the protectors 31 and 32 can abut from the axial center side. For this reason, it is possible to prevent the striking plate 40 from being detached from the pair of protectors 31 and 32 and falling to the bottom surface of the groove 21 due to gravity while the rotor disk 20 is not rotating.

  Next, the features of the striking plate side protrusions 43 and 44 of the striking plate 40 according to the present embodiment will be further described. In order to always ensure the desired crushing efficiency in the crusher 10, it is necessary to always maintain the minimum required protruding length (hereinafter also referred to as “limit protruding length”) in the striking plate 40. Here, in this embodiment, the striking plate 40 is disposed on the outer peripheral side in order to recover the projecting length when the striking plate 40 is worn and the projecting length of the striking plate 40 reaches the limit projecting length. It is configured to be able to pay out. Specifically, in the present embodiment, the first striking plate side protrusion 43 is located on the axial side of the protector 31, 32 on the axial center side of the protector 31, 32, and the first of the protector 31, 32. The protector side protrusion 33 and the axial center side protrusion 34 can be disposed at any location. Further, the second striking plate side protrusion 44 of the striking plate 40 is arranged such that when the first striking plate side projection 43 is disposed at a position closer to the axial center side than the axial center side projection 34 of each protector 31, 32, The protectors 31 and 32 are configured so as to be disposed at a location between the first protector side protrusion 33 and the axial center side protrusion 34. In this case, at the beginning of replacement of the striking plate 40, the first striking plate side protrusion 43 is disposed at a location closer to the axial center than the axial center side projection 34 of each protector 31, 32. Thereafter, when the protruding length of the striking plate 40 reaches the limit protruding length, the first striking plate side protrusion 43 is located between the first protector side protrusion 33 and the axial center side protrusion 34 of each protector 31, 32. The striking board 40 is extended so that it may be arrange | positioned. Thereby, the protrusion length of the striking plate 40 can be recovered.

  The first striking plate side protrusion 43 and the second striking plate side protrusion 44 feed the striking plate 40 in one stage, so that the outer peripheral side end 40b of the striking plate 40 is the outer periphery of the striking plate 40 when it is new. You may be comprised so that it may come to the position substantially the same as the position where the edge part 40b of the side existed. For example, the interval between the first striking plate side protrusion 43 and the second striking plate side projection 44 may be substantially equal to the wear length until the new striking plate 40 reaches the limit protrusion length.

  The crusher 10 may be configured so that the distance from the striking plate 40 to the collision plate 15 can be finely adjusted. For example, the collision plate 15 may be configured to be movable along the radial direction of the rotor disk 20. In this case, the distance between the first striking plate side protrusion 43 and the second striking plate side projection 44 is not equal to the wear length until the new striking plate 40 reaches the limit protrusion length. However, by combining the extension of the striking plate 40 and the fine adjustment of the position of the collision plate 15, the distance between the outer peripheral side end 40b of the striking plate 40 and the collision plate 15 can be reduced by the striking of a new product. It can be made almost the same as when the plate 40 is used. Such fine adjustment of the position of the collision plate 15 may be performed in accordance with the progress of wear on the striking plate 40.

As shown in FIG. 3A, both longitudinal side surfaces 41 and 42 of the striking plate 40 are positioned on the outer peripheral side of the second striking plate side protrusion 44 and extend along the axial direction of the main shaft 18. An outer peripheral projection 45 may be further provided on the outer peripheral side of the 32 first protector projections 32.
In addition, since the above-mentioned striking board side protrusion receives the force corresponding to a centrifugal force from the protector side protrusion of each protector 31 and 32, predetermined | prescribed intensity | strength is calculated | required by the striking board side protrusion. On the other hand, such a large force does not act on the outer peripheral projection. On the other hand, the striking plate side protrusions 43 and 44 and the outer peripheral side protrusion 45 are usually formed integrally from the same material. That is, the striking plate side protrusions 43 and 44 and the outer peripheral side protrusion 45 have the same hardness. In general, the material constituting the striking plate 40 has a higher hardness than the material constituting the protectors 31 and 32. That is, the protectors 31 and 32 are more fragile than the striking plate 40. Here, according to the present embodiment, the outer peripheral projection 45 of the striking plate 40 is arranged on the outer peripheral side of the first protector side projection 33 of the protectors 31 and 32. For this reason, the outer peripheral side protrusion 45 can fulfill the function of preventing the protectors 31 and 32 from being damaged by colliding with the protectors 31 and 32 when the crusher 10 is operated. The height of the outer peripheral projection 45 is not particularly limited, and is appropriately set according to its function. A notch 35 for receiving the outer peripheral projection 45 may be formed in a portion of each protector 31, 32 corresponding to the outer peripheral projection 45 of the striking plate 40.

  As shown in FIG. 3B, each protector 31, 32 may further include an axial center protrusion 34 ′ positioned on the axial center side with respect to the axial center side protrusion 34. The axial center side protrusion 34 ′ is when the first striking plate side protrusion 43 of the striking plate 40 is disposed closer to the axial center side than the axial center side protrusion 34 of each protector 31, 32. When is not operating, the first striking plate side protrusion 43 can be contacted from the axial center side. 4A to 6 (a) to 6 (d) show examples in which the axial center protrusion 34 'is provided on each of the protectors 31 and 32. FIG.

  4A, the protectors 31 and 32 of the rotor disk 20 located at the end of the plurality of rotor disks 20 are displaced by the striking plate 40 in the axial direction of the main shaft 18, as indicated by a one-dot chain line. A displacement prevention mechanism 37 for preventing this may be provided. Although the specific configuration of the displacement prevention mechanism 37 is not particularly limited, for example, the displacement prevention mechanism 37 is formed by a protruding piece 37a protruding from each protector 31, 32 in a direction horizontal to the main shaft 18, and a protruding piece 37a. Hole 37b. In this case, it is possible to prevent displacement of the striking plate 40 in the axial direction of the main shaft 18 by passing a rod-shaped support or the like through the hole 37b.

  FIG. 4B is a diagram illustrating a state in which the displacement of the striking plate 40 in the axial direction of the main shaft 18 is prevented by the displacement prevention mechanism 37. In FIG. 4, the axial direction of the main shaft 18 is a direction orthogonal to the paper surface. As shown in FIG. 4B, a rod-like support 37c is inserted into the hole 37b of the protruding piece 37a. Further, a hole 40c is formed on the surface of the striking plate 40, and the support 37c is fitted in the hole 40c. For this reason, it is possible to prevent the displacement of the striking plate 40 in the axial direction of the main shaft 18. In order to prevent the support 37c from coming out of the hole 40c of the striking plate 40, as shown in FIG. 4B, a hole 37e is formed in the support 37c, and the fixing pin 37d is inserted into the hole 37e. Good. The hole 37e of the support body 37c is formed in a portion located closer to the striking plate 40 than the hole 37b of the protruding piece 37a when the support body 37c is fitted in the hole 40c of the striking plate 40. The fixing pin 37d is configured not to be removed from the hole 37e of the support 37c, and is configured as a split pin, for example.

  Next, the effect | action at the time of crushing objects, such as a rock, using the above-mentioned crusher 10 is demonstrated with reference to FIG. 5A (a)-(d).

(Crushing method)
First, a new striking plate 40 is fixed to each rotor disk 20 via a pair of protectors 31 and 32. FIG. 5A (a) is a diagram showing a new striking plate 40 sandwiched between a pair of protectors 31 and 32. As shown in FIG. 5A (a), in the striking plate 40, the first striking plate side protrusion 43 is disposed at a position closer to the axial center side than the axial center side projection 34, and the second striking plate side protrusion 44 is the first striking plate side protrusion 44. A pair of protectors 31 and 32 is sandwiched between the one protector-side protrusion 33 and the axial center-side protrusion 34. As shown in FIG. 5A (a), the outer peripheral end 40b of the new striking plate 40 may have a hammer-like shape.

  Next, the rotor disk 20 is rotated counterclockwise. Thereafter, an object 13 such as a rock is introduced from the inlet 12. The thrown object 13 collides with the first side surface 41 of the rotating striking plate 40 and is then struck against the colliding plate 15 and the liner 16. When such a crushing process is carried out over a predetermined time, the outer end 40b of the striking plate 40 is worn away on the first side face 41 side. On the other hand, since the second side surface 42 hardly collides with the object 13, the second side surface 42 side remains in a state of being hardly worn. In this case, since the second side surface 42 of the striking plate 40 is used, the rotation direction of the rotor disk 20 may be reversed. That is, the rotor disk 20 may be rotated clockwise after a predetermined time has elapsed. As a result, both the first side surface 41 and the second side surface 42 of the striking plate 40 can be used up. In the state shown in FIG. 5A (a), the first protector-side protrusion 33 of each protector 31 and 32 and the second striking plate-side protrusion 44 of the striking plate 40 come into contact with each other, so that the rotation of the rotor disk 20 is achieved. Sometimes, the striking plate 40 is prevented from jumping out to the outer peripheral side.

  When a certain period of time has passed after reversing the rotation direction of the rotor disk 20, the outer peripheral end 40b of the striking plate 40 is also worn on the second side face 42 side. As a result, as shown in FIG. The protruding length of the striking plate 40 reaches the limit protruding length L. In this case, in order to secure the crushing efficiency of the crusher 10, as shown in FIG. 5A (c), the striking plate 40 is fed out to the outer peripheral side by one step. That is, the first striking plate side protrusion 43 of the striking plate 40 is arranged between the first protector side protrusion 33 and the axial center side protrusion 34 of each protector 31, 32. Here, “one step” means a distance corresponding to the arrangement pitch of the plurality of striking plate side protrusions provided on the striking plate 40. Thereby, the protruding length of the striking plate 40 can be made larger than the limit protruding length L. In the state shown in FIG. 5A (c), the second striking plate side projection 44 of the striking plate 40 can function as a protective projection for protecting the protectors 31 and 32. A specific method for feeding the striking plate 40 to the outer peripheral side by one step will be described in detail later. In the state shown in FIG. 5A (c), the first protector-side protrusion 33 of each protector 31, 32 abuts on the first striking plate-side protrusion 43 of the striking plate 40, so that the rotation of the rotor disk 20 is achieved. Sometimes, the striking plate 40 is prevented from jumping out to the outer peripheral side.

  Thereafter, the crushing process is performed again for a predetermined time. At this time, similarly to the case shown in FIG. 5A (b), the rotor disk 20 is rotated both counterclockwise and clockwise, whereby both the first side surface 41 and the second side surface 42 of the striking plate 40 are moved. You may make it use up. As shown in FIG. 5A (d), when the protruding length of the striking plate 40 reaches the limit protruding length L again, the striking plate 40 is replaced.

(How to move the striking plate)
Next, a method for feeding the striking plate 40 to the outer peripheral side by one step will be described with reference to FIGS.

  In FIG. 6A, the first protector-side protrusion 33 of each protector 31, 32 attached to one rotor disk 20 and the other rotor disk 20 adjacent to the one rotor disk 20 are attached. A gap in the axial direction of the main shaft 18 between the protector 31 and the first protector-side protrusion 33 of each of the protectors 31 and 32 is represented by a symbol P. Further, the length of each projection 43, 44, 45 of the striking plate 40 in the axial direction of the main shaft 18 is represented by the symbol W. In the present embodiment, the protectors 31 and 32 and the striking plate 40 are configured such that the gap P is larger than the length W.

In the step of extending the striking plate 40 to the outer peripheral side by one step, when the striking plate 40 is fixed in the axial direction of the main shaft 18, such fixing is first released. For example, when the above-described displacement prevention mechanism 37 is provided, the fixing pin 37d is first extracted from the support 37c, and then the support 37c is extracted from the hole 40c of the striking plate 40. As a result, the striking plate 40 can be moved in the axial direction of the main shaft 18.
Thereafter, a lifting plate such as a chain block or a hoist crane is used to realize a state where the striking plate 40 is floating from the protectors 31 and 32. Next, as shown in FIG. 6B, when the striking plate 40 is viewed along the radial direction of the rotor disk in the axial direction of the main shaft 18, the projections 43, 44, 45 and the protectors of the striking plate 40 are seen. The first protector side protrusion 33 of 31 and 32 is moved to a place where it does not overlap. The movement distance is generally a value obtained by dividing a value obtained by subtracting the length of the first protector-side protrusion 33 of each protector 31, 32 from the length of each protrusion 43, 44, 45 of the striking plate 40 by two, This value is obtained by adding the value of the length of the first protector side protrusion 33. Then, as shown in FIG.6 (c), the striking board 40 is drawn | fed out only one step to the outer peripheral side using a lifting means. Next, as shown in FIG. 6D, in the axial direction of the main shaft 18, the striking plate 40 is placed between the first protector-side protrusion 33 and the axial center-side protrusion 34 of each protector 31, 32. The first striking plate side protrusion 43 is moved until it is arranged.
Thereafter, the support 37c of the displacement prevention mechanism 37 is fitted into the hole 40c of the striking plate 40, and the fixing pin 37d is inserted into the hole 37e of the support 37c. Thereby, the striking plate 40 is fixed in the axial direction of the main shaft 18.
In this way, the striking plate 40 can be fed out to the outer peripheral side only by one step.

  According to the present embodiment, as described above, the gap P between the two protector-side projections adjacent in the axial direction of the main shaft 18 is the length W of the striking plate-side projection of the striking plate 40 in the axial direction of the main shaft 18. The protectors 31 and 32 and the striking plate 40 are configured so as to be larger. Therefore, by moving the striking plate 40 in the axial direction of the main shaft 18, the engagement between the protector-side projections of the protectors 31 and 32 and the striking plate-side projection of the striking plate 40 in the radial direction of the rotor disk 20. Can be released without moving the protectors 31 and 32 and without moving the striking plate 40 in the thickness direction of the striking plate 40. Thereby, the operation | work which pays out the striking board 40 to an outer peripheral side one step can be implemented easily.

  Further, according to the present embodiment, as described above, the protruding length of the striking plate 40 can be recovered by feeding the striking plate 40 to the outer peripheral side by one step. In this case, the necessary work is the work of moving the striking plate 40 along the axial direction of the main shaft 18 and the work of moving the striking plate 40 to the outer peripheral side. These operations can be easily performed in a state where the striking plate 40 is lifted by the lifting means. For this reason, the protrusion length of the striking plate 40 can be easily recovered in a short time.

  Further, according to the present embodiment, the striking plate 40 is supported by the pair of protectors 31 and 32 as described above. That is, the side surfaces 41 and 42 of the striking plate 40 facing each other in the circumferential direction of the rotor disk 20 are supported by the protectors 31 and 32, respectively. For this reason, in each of the case where the rotor disk 20 is rotated counterclockwise and the case where the rotor disk 20 is rotated clockwise, the reaction force received by the striking plate 40 from the rock or the like can be received by the protectors 31 and 32. Therefore, the rotor disk 20 can be rotated in both directions. Thus, both side surfaces 41 and 42 of the striking plate 40 can be used without removing the striking plate 40.

  In the above-described embodiment, the example in which the rotation direction of the rotor disk 20 is reversed to use the second side surface 42 of the striking plate 40 has been described. However, the method for using the second side surface 42 of the striking plate 40 is not limited to this. For example, after the end 40b on the outer peripheral side of the striking plate 40 is worn on the first side surface 41 side, the front and back of the striking plate 40 may be reversed. In this case, even when the rotor disk 20 is always rotating in one direction, for example, counterclockwise, both the first side surface 41 and the second side surface 42 of the striking plate 40 can be used up. Further, according to the present embodiment, as described above, the protector 31 is moved by moving the striking plate 40 in the axial direction by the length W of the striking plate-side protrusion of the striking plate 40 in the axial direction of the main shaft 18. , 32 and the striking plate side projection of the striking plate 40 can be disengaged. For this reason, the operation | work which reverses the front and back of the striking board 40 can be implemented easily.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. 7 and 8A to 8D. In the following description and the drawings used in the following description, parts that can be configured in the same manner as in the first embodiment described above are the same as those used for the corresponding parts in the first embodiment described above. Reference numerals will be used, and redundant description will be omitted. In addition, when it is clear that the effects obtained in the first embodiment described above can be obtained in the present embodiment, the description thereof may be omitted.

  In the first embodiment described above, an example is shown in which a plurality of striking plate side protrusions are provided on the striking plate 40, and thereby it is realized that the striking plate 40 is fed out to the outer peripheral side in one stage. . On the other hand, in the present embodiment, by forming a plurality of protector-side protrusions on the protectors 31 and 32, the striking plate 40 is fed out to the outer peripheral side in one stage. For example, as shown in FIG. 7, in the present embodiment, each protector 31, 32 has a first protector-side protrusion 33 that extends along the axial direction of the main shaft 18, and an outer peripheral side than the first protector-side protrusion 33. A second protector-side protrusion 36 that extends along the axial direction of the main shaft 18, and an axial center side that is provided on the axial center side of the first protector-side protrusion 33 and extends along the axial direction of the main shaft 18. And a protrusion 34. Further, on both longitudinal side surfaces 41, 42 of the striking plate 40, there are provided first striking plate side protrusions 43 that are located in the vicinity of the end 40 a on the axial center side of the striking plate 40 and extend along the axial direction of the main shaft 18. It has been. In this case, the first striking plate side projection 43 of the striking plate 40 is located between the first protector side projection 33 and the axial center side projection 34 of each protector 31, 32, and each of the protectors 31, 32. The second protector-side protrusion 36 and the first protector-side protrusion 33 can be disposed at any location.

  Also in the present embodiment, as in the case of the first embodiment described above, as shown in FIG. 8A, the gap between the two protector-side protrusions 33 and 36 adjacent in the axial direction of the main shaft 18. The protectors 31 and 32 and the striking plate 40 are configured so that P is greater than the length W of the striking plate-side protrusion 43 of the striking plate 40 in the axial direction of the main shaft 18. For this reason, as shown in FIGS. 8B to 8D, by moving the striking plate 40 in the axial direction of the main shaft 18, the protector-side protrusions and striking of the protectors 31 and 32 in the radial direction of the rotor disk 20 are hit. The engagement between the striking plate side protrusions of the plate 40 can be released without moving the protectors 31 and 32 and without moving the striking plate 40 in the thickness direction of the striking plate 40. Thereby, the operation | work which pays out the striking board 40 to an outer peripheral side one step can be implemented easily. 8B to 8D, the protector side protrusions 33 and 36 and the axial center side protrusion 34 are omitted in order to prevent the figure from becoming complicated.

Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIGS. 9 and 10 (a) to 10 (d). In the following description and the drawings used in the following description, parts that can be configured in the same manner as in the first embodiment described above are the same as those used for the corresponding parts in the first embodiment described above. Reference numerals will be used, and redundant description will be omitted. In addition, when it is clear that the effects obtained in the first embodiment described above can be obtained in the present embodiment, the description thereof may be omitted.

In the first or second embodiment described above, an example in which the striking plate side protrusion of the striking plate 40 or the protector side protrusions of the protectors 31 and 32 is provided in two stages. However, the present invention is not limited to this, and the striking plate side protrusions of the striking plate 40 or the protector side protrusions of the protectors 31 and 32 may be provided in three or more stages.
For example, as shown in FIG. 9, in the present embodiment, both longitudinal side surfaces 41, 42 of the striking plate 40 are positioned on the outer peripheral side with respect to the second striking plate side protrusion 44, and extend along the axial direction of the main shaft 18. A third striking plate side protrusion 46 extending further is provided. In this case, the third striking plate side projection 46 of the striking plate 40 is arranged such that the second striking plate side projection 44 is disposed at a position closer to the axial center than the axial center projection 34 of each protector 31, 32. Each protector 31, 32 is configured to be disposed between the first protector side protrusion 33 and the axial center side protrusion 34.

  The striking plate side protrusions 43, 44, 46 of the striking plate 40 may be provided at a constant arrangement pitch in the radial direction of the rotor disk 20. Thereby, the feeding length of the striking plate 40 in the radial direction of the rotor disk 20 can be made constant at each stage.

  Also in the present embodiment, as in the case of the first embodiment described above, the gap P between the two protector-side protrusions 33 adjacent in the axial direction of the main shaft 18 is provided as shown in FIG. The protectors 31 and 32 and the striking plate 40 are configured to be larger than the length W of the striking plate-side protrusions 43, 44, and 46 of the striking plate 40 in the axial direction of the main shaft 18. For this reason, as shown in FIGS. 10B to 10D, by moving the striking plate 40 in the axial direction of the main shaft 18, the protector-side protrusions and striking of the protectors 31 and 32 in the radial direction of the rotor disk 20 are hit. The engagement between the striking plate side protrusions of the plate 40 can be released without moving the protectors 31 and 32 and without moving the striking plate 40 in the thickness direction of the striking plate 40. Thereby, the operation | work which pays out the striking board 40 to an outer peripheral side one step can be implemented easily. In FIGS. 10B to 10D, the protector side protrusion 33 and the axial center side protrusion 34 are omitted in order to prevent the figure from becoming complicated.

  Although not shown in the drawings, each of the protectors 31 and 32 is further provided with one or more protector-side protrusions that are located on the outer peripheral side of the second protector-side protrusion 36 and extend along the axial direction of the main shaft 18. It may be provided. Also in this case, the striking plate 40 is formed by making the gap between two protector side projections adjacent in the axial direction of the main shaft 18 larger than the length of the striking plate side projection of the striking plate 40 in the axial direction of the main shaft 18. It becomes possible to easily carry out the operation of feeding out one step to the outer peripheral side.

(Other variations)
Moreover, in each above-mentioned embodiment, the striking board 40 and each protector 31 and 32 are comprised so that the protrusion length of the striking board 40 can be recovered | restored by paying out the striking board 40 to an outer peripheral side. showed that. However, the present invention is not limited to this, and although not shown, the striking plate 40 and the protectors 31 and 32 can recover the protruding length of the striking plate 40 by inverting the striking plate 40 upside down. It may be configured. Also in this case, as in the case of each of the above-described embodiments, the gap between the two protector-side protrusions adjacent in the axial direction of the main shaft 18 is any striking plate-side protrusion of the striking plate 40 in the axial direction of the main shaft 18. The protectors 31 and 32 and the striking plate 40 are configured so as to be larger than the length W. Therefore, by moving the striking plate 40 in the axial direction of the main shaft 18, the engagement between the protector-side projections of the protectors 31 and 32 and the striking plate-side projection of the striking plate 40 in the radial direction of the rotor disk 20. Can be released without moving the protectors 31 and 32 and without moving the striking plate 40 in the thickness direction of the striking plate 40. Thereby, the work of moving the striking plate 40 to the outer peripheral side, taking out the striking plate 40 to the outside, and reversing the top and bottom of the striking plate 40 can be easily performed.

DESCRIPTION OF SYMBOLS 10 Crusher 18 Main axis | shaft 20 Rotor disc 21 Groove 31 1st protector 32 2nd protector 33 1st protector side protrusion 34 Axis center side protrusion 36 2nd protector side protrusion 37 Displacement prevention mechanism 40 Impact plate 43 1st impact plate Side protrusion 44 Second striking plate side protrusion 45 Outer peripheral side protrusion 46 Third striking plate side protrusion

Claims (3)

A crusher for crushing an object,
The spindle,
A plurality of rotor disks fixed to the main shaft and rotating around the main shaft as a rotation axis, wherein a plurality of grooves are formed on the outer periphery thereof; and
A pair of protectors attached to the groove of the rotor disk and facing each other;
A striking plate that collides with the object, the striking plate having both longitudinal sides sandwiched by the pair of protectors,
Each of the pair of protectors is provided with at least one protector-side protrusion extending along the axial direction of the main shaft, and an axial-side protrusion extending along the axial direction of the main shaft, provided on the axial center side with respect to the protector-side protrusion. And having
At least one striking plate side projection that extends along the axial direction of the main shaft and can be disposed at a location between the protector side projection and the axial center side projection of the protector is formed on both longitudinal side surfaces of the striking plate. Provided,
A plurality of the rotor disks are fixed to the main shaft along the axial direction of the main shaft,
The pair of protectors are attached to the grooves of each rotor disk,
The length of the striking plate-side protrusion of the striking plate in the axial direction of the main shaft is such that the protector-side protrusion of the protector attached to one rotor disk and another rotor disk adjacent to the one rotor disk. It is smaller than the gap in the axial direction of the main shaft between the protector-side protrusions of the protector attached to the protector, and by moving the striking plate in the axial direction of the main shaft, A crusher capable of releasing the engagement between the striking plate and the protector in the radial direction of the rotor disk without moving the pair of protectors.   The crusher according to claim 1, wherein the protector is provided with a displacement prevention mechanism for preventing the striking plate from being displaced in the axial direction of the main shaft. The displacement prevention mechanism includes a protruding piece protruding from the protector in a direction horizontal to the main shaft, a hole formed in the protruding piece, and a rod-shaped support inserted into the hole,
The crusher according to claim 2, wherein a hole into which the support body of the displacement prevention mechanism is inserted is formed on a surface of the striking plate.

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