JP2009195909A - Crusher - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crusher of simple structure dispensing with a return case for a coarse crushing blade and a lot of parts for it. <P>SOLUTION: The crusher A crushes crushing objects dropped from a hopper P by cooperation with fixed blades 30, by the rotation of the coarse crushing blades 10 and rotary blades 20 interlocking with the rotation of a rotary shaft 50. A housing H is provided with front and rear walls 1, 2, and right and left open/close doors 4, 5 capable of outwardly rising and falling with lower ends as fulcrums. Return case parts 60, 60 covering the coarse crushing blades are respectively integratedly formed on inner faces of the right and left open/close doors facing the coarse crushing blades. The return case parts are joined each other at the lower parts when the right and left open/close doors are closed. Part of the crushing object coarsely crushed by the coarse crushing blades is induced and regulated from an upper end of the return case part of one open/close door to an upper end of the return case part of the other open/close door. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pulverizer that pulverizes an object to be crushed, which is a byproduct (such as a sprue or a runner) generated during molding of a thermoplastic synthetic resin product, and enables reuse.

  Conventionally, a housing is connected to the lower part of a hopper that accommodates the object to be crushed, and the object to be crushed dropped from the hopper is installed on a rotary blade provided on the outer periphery of the rotary shaft in the housing, and at an appropriate position of the rotary blade Discharge port formed by crushing the two large crushing blades, these rotary blades and crushing blades, and fixed blades provided on the inner surfaces of both side walls of the housing, and forming the crushed material below the housing There is a pulverizer that is discharged from (see, for example, Patent Document 1).

  The housing is arranged in close contact between the front and rear walls arranged at a predetermined interval, the tie rod shaft spanned to maintain the predetermined interval between the front and rear walls, and the front and rear walls. The left and right open / close doors are arranged with the lower end as a fulcrum and can be tilted outward. The lower end of the open / close door is pivotally supported by the tie rod shaft.

  In addition, the space between both fulcrum shafts leads directly to the discharge port, but the crushing blade is provided mainly for crushing large objects to be crushed, and was crushed by this crushing blade. The object to be crushed is not discharged as it is, but is finely pulverized by an adjacent rotary blade, and only the object to be pulverized is discharged from the outlet.

  Therefore, if the crushing blade is covered between both fulcrum shafts, the material to be crushed with the crushing blade will be discharged from the discharge port. Has been provided with a return case for the crushing blade for covering the crushing blade.

  Specifically, a guide portion for inserting the return case for the roughing blade is formed at the lower inner surface of the left and right open / close doors, and the return case for the roughing blade divided into the guide portions. Are inserted and connected from the left and right, respectively, and these are integrated to cover all but the upper part of the crushing blade. And the material to be crushed by this crushing blade is returned upward through this return case and guide part, and is naturally transferred to the adjacent rotary blade, and then finely crushed by this rotary blade, It is discharged from the outlet.

JP 2004-105863 A

  However, in the conventional crusher, it is necessary to perform tightening adjustment to keep the predetermined distance between the front and rear walls constant, but the fulcrum shaft of the opening and closing door maintains the predetermined distance between the front and rear walls. Therefore, if there is a deviation in the adjustment of the tie rod shaft, the fixed blade provided on the inner surface of the open / close door and the rotary blade or the coarse crushing blade may be joined without meshing well. There is a problem that the adjustment of the tie rod shaft is delicate and difficult.

  On the other hand, since the space between both fulcrum shafts is wide, it is preferable in that a large amount of pulverized material can be discharged from the discharge port.

  However, in order to provide a return case for the roughing blade in a wide space between the two fulcrum shafts, in addition to the divided return case for the roughing blade, the fall prevention rod of the return case for the roughing blade In addition, many parts such as an eccentric cam are required, and the structure is complicated.

  An object of the present invention is to provide a pulverizer having a simple structure that can eliminate the need for a return case for a coarse crushing blade and a number of parts associated therewith.

To achieve the above objective,
The pulverizer according to claim 1 is driven by a housing connected to a lower portion of a hopper that accommodates an object to be pulverized, and a motor unit that is horizontally provided in the housing in the front-rear direction and connected to one end. A rotating shaft rotated in one direction, a roughing blade and a rotating blade provided on the rotating shaft, a fixed blade provided on inner surfaces of both side walls of the housing, and a discharge port formed below the housing; The crushing blade and the rotating blade rotate in conjunction with the rotation of the rotating shaft, and the crushing object is dropped from the hopper by the cooperation of the crushing blade and the rotating blade and the fixed blade. In the pulverizer configured to pulverize an object, the housing is arranged in close contact between the front and rear walls and the front and rear walls arranged at a predetermined interval, and the lower end is a fulcrum. Each left to the outside, A return case part that externally covers the crushing blade is integrally formed on the inner surfaces of the left and right doors facing the crushing blade. In the state where the left and right open / close doors are closed, the lower ends of the return case portions are joined to each other, and a part of the object to be crushed by the crushing blade is transferred to one of the open / close doors. The structure is characterized in that it is guided and regulated from the upper end portion of the return case portion to the upper end portion of the return case portion of the other opening / closing door.

A plurality of the rotary blades may be provided in series with the rotary shaft, and the crushing blades may be installed with a gap between the rotary blades.
A crusher according to a second aspect of the present invention is the crusher according to the first aspect, wherein a chamfer is formed at an upper end corner portion of the lower end portion of the return case portion.

  According to a third aspect of the present invention, in the second aspect, the chamfered upper end corner is formed with an inclined surface that goes down toward the roughing blade.

The present invention has the following effects.
According to the pulverizer according to the first aspect, since the return case part that externally covers the crushing blade is integrally formed on the inner surfaces of the left and right open / close doors opposed to the crushing blade, The number of parts can be reduced by eliminating the need for the crushing return case and the many parts associated therewith.

  According to the pulverizer according to claim 2, since the upper corner of the lower end portion of the return case portion is chamfered, the upper end of the return case portion is opened and closed when the opening / closing door is operated around the fulcrum of the lower end. The corner portion can be reliably avoided from coming into contact with the rotary blade, and the door can be opened and closed more reliably.

  According to the pulverizer according to claim 3, the object to be pulverized jumps out of the return case portion through the groove portion by forming an inclined surface that descends toward the crushing blade side at the chamfered upper end corner portion. Can be prevented.

1 is a schematic overall perspective view showing an embodiment of a pulverizer A according to the present invention. FIG. 2 is a schematic plan view showing a closed state when the hopper P of FIG. 1 is opened and the housing H is viewed from above. It is a schematic sectional drawing which shows the closed door state which cut | disconnected FIG. 2 by the XX part. It is a schematic sectional drawing which shows the connection part of a fulcrum shaft and a bearing part. FIG. 2 is a schematic plan view of the door opened when the hopper P of FIG. 1 is opened and the housing H is viewed from above. It is a schematic sectional drawing which shows the door opening state which cut | disconnected FIG. 5 by the XX part. It is a schematic sectional drawing of the closed state which showed the other Example of the grinder A which concerns on this invention. It is a schematic sectional drawing which shows the door open state of FIG. It is a schematic sectional drawing which shows the state which removed the opening / closing door from FIG. FIG. 10A is a schematic sectional view showing a closed state of still another embodiment of the pulverizer A according to the present invention, and FIG. 10A is a schematic sectional view showing the same opened state as FIG. b) is a schematic cross-sectional view showing a state after rotating the crushing blade of FIG. It is a schematic sectional drawing of the closed state which shows the other Example of a bearing part.

  Hereinafter, the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic overall perspective view showing an embodiment of a pulverizer A according to the present invention, FIG. 2 is a schematic plan view of a closed state when the hopper P of FIG. 1 is opened and the housing H is viewed from above, 3 is a schematic cross-sectional view showing a closed state of FIG. 2 cut along a line XX, FIG. 4 is a schematic cross-sectional view showing a connecting portion between a fulcrum shaft and a bearing portion, and FIG. 5 is a hopper P of FIG. And FIG. 6 is a schematic cross-sectional view showing the open state of FIG. 5 taken along the line XX.

  In the pulverizer A of the present invention, a housing H is connected to a lower portion of a hopper P that accommodates an object to be crushed (not shown, the same applies hereinafter), and the object to be crushed dropped from the hopper P is provided in the housing H. The crushing blade 10 and the rotary blade 20 were pulverized by the cooperation of the fixed blades 30 provided on the inner surfaces of both sides of the housing H, and the pulverized product (not shown, the same applies hereinafter) was provided below the housing H. The fulcrum shaft 6 that is discharged from the discharge port 40 and is different from the tie rod shaft 3 spanned on both lower ends of the front wall 1 and the rear wall 2 of the housing H is used as a bearing for the left and right open / close doors 4 and 5. While the part 7 receives, the fulcrum shaft 6 is provided inside the tie rod shaft 3.

  Hereinafter, each member will be described in detail with reference to FIGS.

  The hopper P is a casing penetrating up and down, and forms an input port P1 for supplying an object to be crushed above. However, the shape of the hopper P is not limited to that shown in the figure, and a lid (not shown) may be provided at the insertion port P1.

  A hinge P2 is provided at the front lower end of the hopper P so as to connect the upper end of the front wall 1 of the housing H. As shown by an imaginary line in the drawing, the hopper P2 is used as a center of rotation. The upper portion of the housing H can be opened by tilting the entire P forward. A lock device (not shown) that locks or unlocks the connection with the housing H is provided at the lower end of the hopper P to prevent inadvertent opening of the housing H.

  A transparent window P3 is provided on the side wall of the hopper P so that the state of the object to be crushed can be easily seen from the outside.

  A housing H is connected to the lower portion of the hopper P.

  The housing H has a front wall 1 and a rear wall 2 erected at a predetermined interval in front of and behind the horizontal frame plate base H 1, and is attached to both lower ends of the front wall 1 and the rear wall 2. The penetrating tie rod shaft 3 is bridged and connected.

  The tie rod shaft 3 is threaded at both ends, penetrates both lower ends of the front wall 1 and the rear wall 2, and then tightens a nut 31 from the front end to connect the front wall 1 and the rear wall 2. A predetermined interval can be adjusted, and a so-called double nut structure in which a nut 31 ′ is further screwed from the outside of the nut 31 to prevent loosening of the adjusted nut 31.

After tightening the tie rod shaft 3 with the nut 31 and adjusting the predetermined distance between the front wall 1 and the rear wall 2 in this way, bolts and nuts for connecting the front wall 1 and the rear wall 2 to the frame plate base H1. By tightening H2, the front wall 1 and the rear wall 2 spaced apart from each other on the frame plate base H1 are fixed.
However, since the upper end sides of the front wall 1 and the rear wall 2 are easily bent with only these two tie rod shafts 3, the front wall 1 and the rear wall 2 have at least one upper end side thereof. A conventional auxiliary arm 9 is secured with bolts (not shown) or the like.

  The auxiliary arm 9 may be provided on both sides of the upper end of the front wall 1 and the rear wall 2 as long as it can prevent bending of the upper end side of the front wall 1 and the rear wall 2.

  A rotating shaft 50 that is horizontally mounted in the front and rear directions is communicated with substantially the center of the front wall 1 and the rear wall 2, and a plurality of rotating blades 20 are continuously provided by being fitted into the rotating shaft 50. At the same time, two crushing blades 10 are placed at an interval between the rotary blades 20.

  That is, the base end of the rotating shaft 50 passes through the approximate center of the rear wall 2 and is connected to the motor unit 41 installed behind the rear wall 2, and rotates as the motor unit 41 rotates. The shaft 50 is rotated. On the other hand, the tip of the rotating shaft 50 passes through the approximate center of the front wall 1 and is connected to a bearing body 42 installed in front of the front wall 1. The bearing body 42 has a known bearing structure using a bearing steel ball or the like, and can rotate the rotating shaft 50 smoothly.

  Further, for example, a small rectangular recess (not shown) may be formed at the center of the tip surface of the rotating shaft 50. If such a recess (not shown) is formed, a hexagon wrench or the like may be formed on the recess. If one end of the tool is inserted and then rotated in the circumferential direction of the rotating shaft 50, the rotating shaft 50 can be manually rotated. Therefore, it is desirable that the bearing body 42 installed at the tip of the rotary shaft 50 is detachably attached to the front wall 1 using screws 43 or the like.

  Such a manual rotation operation of the rotary shaft 50 is particularly effective when the roughing blade 10 or the rotary blade 20 is replaced. For example, in order to replace the roughing blade 10 with a new one, an old roughing blade 10 is used. Although the operation | work which pulls out the crushing blade 10 from the front-end | tip of the rotating shaft 50 is needed, depending on the stop position of the crushing blade 10, it will be caught by the left and right doors 4 and 5 inner surface, and this cannot be pulled out. In such a case, if the rotary shaft 50 is manually rotated at this time, the coarse crushing blade 10 is also rotated accordingly, so that the direction of the coarse crushing blade 10 is manually changed to a desired position. This is effective when the roughing blade 10 or the rotary blade 20 is exchanged.

  Between the front wall 1 and the rear wall 2 formed as described above, the left open / close door is arranged in close contact with each other and can be tilted outward with its lower end as a fulcrum. 4 and the right open / close door 5 are provided.

  Specifically, a bearing portion 7 that is pivotally supported on the front wall 1 and the rear wall 2 by a fulcrum shaft 6 different from the tie rod shaft 3 is formed at the lower ends of the open / close doors 4 and 5. , Provided inside the tie rod shaft 3.

  The fulcrum shaft 6 can be bridged between the front wall 1 and the rear wall 2, but this fulcrum shaft 6 is a dedicated shaft for opening and closing the open / close doors 4, 5. It is not necessary to share the function as the tie rod shaft 3. For this reason, in this embodiment, the columnar fulcrum shaft 6 projects inwardly on the front wall 1 and the rear wall 2, and the bearing portion 7 pivotally attached to the fulcrum shaft 6 is provided at the lower ends of the open / close doors 4 and 5. Each is formed.

Here, as shown in FIG. 4, the bearing portion 7 is formed in extended pieces 72 and 72 that extend inward from the front and rear ends of the doors 4 and 5, respectively.
By forming the extended piece 72 and providing the bearing portion 7 on the extended piece 72, the fulcrum shaft 6 is provided inside the tie rod shaft 3, and the left and right open / close doors 4 and 5 are formed. The size of the discharge port 40 can be kept as wide as in the prior art.

  Further, the fulcrum shaft 6 may be formed integrally with the front wall 1 and the rear wall 2, but in this embodiment, the fulcrum shaft 6 is formed separately and is formed on each of the front wall 1 and the rear wall 2. The structure is such that the fulcrum shaft 6 is fixed after passing through the provided shaft hole (not shown).

  More specifically, as shown in FIG. 2, a groove 61 is formed substantially inside the outer end of the fulcrum shaft 6, and a part of the plate material 62 is fitted into the groove 61. The plate member 62 and the front wall 1 or the rear wall 2 are fixed by penetrating a stopper 63 such as a bolt or a screw into the protruding plate member 62, and the fulcrum shaft 6 formed separately is attached to the front wall 1 and the rear wall. The structure is fixed to the wall 2.

  Therefore, it is possible to remove the fulcrum shaft 6 from the outside by removing the stopper 63 with a tool or the like and pulling out the plate member 62, and the left and right open / close doors 4 can be extracted by removing the front and rear fulcrum shafts 6. 5 or 5 can be completely removed from the housing H.

  By completely removing the left and right open / close doors 4 and 5 in this way, the sides of the housing H are completely opened as well as cleaning the open / close doors 4 and 5. Can also be easily done.

  Further, since the fulcrum shaft 6 is cut off from the tie rod shaft 3, it is not affected by the adjustment of the tie rod shaft 3. Therefore, the tie rod shaft 3 can be easily adjusted without worrying about the meshing of the fixed blade 30 provided on the inner surfaces of the open / close doors 4 and 5 with the rotary blade 20 or the crushing blade 10.

Further, as shown in FIG. 3, the fulcrum shaft 6 is installed inside the tie rod shaft 3.
Here, in other words, installing inside means that it is installed so as to be close to the rotating shaft 50, but by providing the fulcrum shaft 6 inside the tie rod shaft 3 in this way, for example, left Even if the return case portion 60 that covers the roughing blade 10 is integrally formed and extended on the inner surfaces of the right opening and closing doors 4 and 5, the inner edge 60 ′ of the return case portion 60 and the fulcrum shaft 6 Therefore, even if the left and right open / close doors 4 and 5 are opened, the inner edge 60 ′ of the return case portion 60 becomes the rough crushing blade 10. The doors 4 and 5 can be opened and closed without contacting the adjacent rotary blade 20.

  The function of the return case portion 60 is the same as that of the conventional case, and a part of the object to be crushed by the crushing blade 10 is pushed by the crushing blade 10 while the other return case portion 60 is pushed from the upper end to the other. A half turn is made to the upper end of the return case portion 60, and when the guide regulation of the return case portion 60 disappears, a part of the object to be crushed jumps out and moves to a plurality of rotary blades 20 adjacent to the coarse crushing blade 10. Then, after being finely pulverized by these rotary blades 20, it is discharged.

  Therefore, the return case portions 60 and 60 provided in the left and right open / close doors 4 and 5 respectively have two return case portions when the left and right open / close doors 4 and 5 are closed as shown in FIG. 60 and 60 are joined and integrated at the center position of the housing H in the left-right direction.

  Further, in this embodiment, the upper end of the joining surface of the two return case portions 60, 60 is chamfered at the corner, so that the cut groove 8 is formed when the return case portions 60, 60 are joined together. I have to.

  Thus, when the opening / closing doors 4 and 5 are opened / closed around the fulcrum shaft 6 by chamfering the corner portion at the upper end of the joining surface of the return case portion 60, the upper end corner portion of the return case portion 60 is a rotary blade. Thus, it is possible to perform the opening / closing operation with certainty while avoiding contact with 20.

  However, if the corners are chamfered, the above-described effect can be obtained. On the other hand, there is a possibility that the object to be crushed in the return case 60 leaks from the cut groove 8. Therefore, as shown in the enlarged schematic diagram surrounded by the broken line in FIG. 3, the cut groove 8 of the present embodiment is narrowed toward the joint surface of the return case portion 60 and toward the roughing blade 10 side. A descending inclined surface 81 (indicated by oblique lines) is formed. The inclined surface 81 forms a symmetrical inclined surface 81 on each of the left and right return case portions 60 as shown in the upper view of the enlarged view, or as shown in the lower view of the enlarged view, You may form only in one return case part 60. FIG. When forming only in this one return case part 60, it forms only in the return case part 60 of the side where the inclination area of the inclined surface 81 becomes gradually small toward the advancing direction of the crushing blade 10 shown by the arrow in the figure. be able to.

  If such an inclined surface 81 is formed, the object to be crushed that has been pushed out with the rotation of the return case portion 60 is guided inward by the inclined surface 81. Jumping out of the return case 60 from the cut groove 8 can be prevented.

  The pulverizer A of the present invention configured as described above is used in the following manner.

  First, the open / close doors 4 and 5 of the housing H are closed, and the hopper P is continuously provided on the housing H, and a material to be crushed is fed from the charging port P1 of the hopper P. In addition, in order to hold | maintain the closed state of the opening-and-closing doors 4 and 5, locking with a locking device (illustration omitted) is the same as before.

  Then, after the desired amount of the object to be crushed is stored in the hopper P, if the motor unit 41 is driven, the rotary shaft 50 in the housing H is rotated, and in conjunction with this, the coarse crushing blade 10 and the rotary blade 20 are rotated. Also rotate.

  Along with this rotation, the object to be crushed filled on the rotary blade 20 is pulverized to a certain size by the rotary blade 20 and the fixed blade 30, and the pulverized pulverized material is discharged to the discharge port below the rotary blade 20. Dropped from 40. The object to be crushed is also divided by the coarse crushing blade 10 to assist the rotary blade 20, and the divided object to be crushed is also pulverized to a certain size by the rotating blade 20 and the fixed blade 30. , It is dropped from the discharge port 40.

  Then, the pulverized pulverized material is discharged out of the pulverizer A through the discharge nozzle 40 ′ communicated with the discharge port 40.

  Since the pulverization work is performed in this way and the pulverized material remains on the coarse pulverization blade 10, the rotary blade 20, or the fixed blade 30 in the housing H after the completion of the operation, the cleaning work or the maintenance work is performed. I do.

  In this cleaning operation or the like, the locking device (not shown) is unlocked, and the upper portion of the housing H is opened simply by tilting the hopper P, and the hopper P or the upper surface of the housing H can be easily cleaned or the like ( See FIGS. 1-3.)

  When cleaning the housing H or the like, the left and right open / close doors 4 and 5 are grasped by holding the spherical handles and pulling them outwards, and the left and right doors The open / close doors 4 and 5 are tilted outward with the fulcrum shaft 6 as the center of rotation, the side of the housing H is opened, and remains on the roughing blade 10, the rotary blade 20, the fixed blade 30, the return case portion 60, etc. The finely pulverized product can be easily cleaned (see FIGS. 5 and 6).

  Further, when the fixed blade 30 is replaced, as described above, if the fastener 63 is removed with a tool or the like and the front and rear fulcrum shafts 6 are extracted, one of the left and right open / close doors 4 and 5 or Since both of them can be completely removed from the housing H, the maintenance work of the fixed blade 30 or the doors 4 and 5 can be easily performed.

  7 is a schematic sectional view showing a closed state of another embodiment of the pulverizer A according to the present invention, FIG. 8 is a schematic sectional view showing the opened state of FIG. 7, and FIG. 9 is opened and closed from FIG. It is a schematic sectional drawing which shows the state which removed the door.

  Here, only the features of the present embodiment will be described, and portions common to FIGS. 1 to 6 are denoted by common numbers, and the description thereof is omitted.

  The pulverizer A shown in FIGS. 7 to 9 is characterized in that the bearing portion 7 formed at the lower ends of the left and right open / close doors 4 and 5 is formed with a notch portion 71 that can be inserted into and removed from the fulcrum shaft 6. .

  The fact that the fulcrum shaft 6 can be inserted / removed means that the bearing portion 7 can be inserted / removed in the diametric direction of the fulcrum shaft 6 as shown in the figure, instead of being inserted / removed in the axial direction of the fulcrum shaft 6. .

  That is, as described above, for example, when replacing the fixed blade 30, it is desired to completely remove one or both of the left and right open / close doors 4, 5 from the housing H. In this embodiment, Since the notch portion 71 is formed in the bearing portion 7, the left and right open / close doors 4 and 5 can be easily detached from the housing H even when the fulcrum shaft 6 remains fixed.

  In addition, as shown in FIGS. 7 and 8, the left and right open / close doors 4 and 5 can perform an open / close operation in the same manner as in the first embodiment. As shown in FIG. 9, the open / close doors 4 and 5 can be completely removed from the housing H more simply by holding the open / close doors 4 and 5 and pulling them out in the direction indicated by the arrows in the figure.

  The invention in which the notch portion 71 is formed in the bearing portion 7 can be used other than that of the first embodiment. For example, the invention can be used for an opening / closing door in a conventional crusher.

  FIG. 10 is a schematic sectional view showing a closed state of still another embodiment of the pulverizer A according to the present invention, and FIG. 10A is a schematic sectional view showing the same opened state as FIG. FIG.10 (b) is a schematic sectional drawing which shows the state after rotating the crushing blade of Fig.10 (a).

  Here, only the features of the present embodiment will be described, and portions common to FIGS. 1 to 6 are denoted by common numbers, and the description thereof is omitted.

  In this pulverizer A, the coarse pulverizing blade 10 includes two blade portions 10 a and 10 b, and the two blade portions 10 a and 10 b are asymmetrical with respect to the rotation shaft 50. In addition, both of the two blade portions 10a and 10b are arranged on one side with respect to the central axis in the diameter direction of the rotating shaft 50.

  That is, the crushing blade 10 of this embodiment includes two blade portions 10a and 10b, and these blade portions 10a and 10b are arranged in a substantially inverted L shape around the rotation shaft 50 as shown in the figure. In other words, when the left and right open / close doors 4 and 5 are opened, as shown in FIG. 10B, the coarse crushing blade 10 and the open / close doors 4 and 5 are formed. However, the rough crushing blade 10 is formed so as not to be polymerized when viewed from the axial direction.

  Therefore, for example, when exchanging the crushing blade 10 or the rotary blade 20, the crushing blade 10 is gripped, or as described above, the rotary shaft 50 itself is manually moved using a tool or the like. By rotating, for example, the roughing blade 10 located at the position of FIG. 10A is moved in the direction of the arrow in the drawing so as to be set to the position of FIG. 10B.

  If such a crushing blade 10 is formed, the crushing blade 10 can be pulled out as it is without coming into contact with the return case portion 60 only by moving the crushing blade 10 to a specific position.

  Therefore, the rough crushing blade 10 can be pulled out toward the front end in the axial direction of the rotary shaft 50 without removing the left and right open / close doors 4 and 5 one by one. Can be easily performed.

  In addition, the invention which made the shape of this rough crushing blade 10 into a specific shape can be used besides the thing of Example 1, 2, for example, can also be used as a rough crushing blade in the conventional crusher. Is possible.

  FIG. 11 is a schematic cross-sectional view in a closed state showing another embodiment of the bearing portion shown in FIGS.

  Here, only the features of the present embodiment will be described, and portions common to those shown in FIGS.

  In this embodiment, in order to further form the fulcrum shaft 6 inside the tie rod shaft 3, the extension piece 72 is formed toward the inside of the lower ends of the open / close doors 4 and 5, and the extension piece 72 has a bearing portion. 7 is formed.

  According to such a bearing portion 7, the extension piece 72 is formed inside the lower ends of the left and right open / close doors 4 and 5, and the fulcrum shaft is maintained while maintaining the positions of the left and right open / close doors 4 and 5. 6 can be further easily provided inside the tie rod shaft 3.

  Of course, as in FIG. 4, the size of the discharge port 40 can also be maintained widely in this embodiment.

  INDUSTRIAL APPLICABILITY The present invention can be effectively used as a pulverizer that pulverizes an object to be pulverized such as a sprue runner and enables reuse.

A pulverizer P hopper H housing 1 front wall 2 rear wall 3 tie rod shaft 4 (left side) opening / closing door 5 (right side) opening / closing door 6 fulcrum shaft 7 bearing portion 71 notch portion 8 notch groove 81 inclined surface 10 rotating blade 10a, 10b blade Part 20 Crushing blade 30 Fixed blade 40 Discharge port 50 Rotating shaft 60 Return case part

Claims (3)

A housing connected to a lower portion of a hopper for containing the object to be crushed, a rotating shaft provided horizontally in the front-rear direction in the housing and rotated in one direction by driving a motor unit connected to one end; A crushing blade and a rotating blade provided on the rotating shaft, a fixed blade provided on the inner surface of both side walls of the housing, and a discharge port formed below the housing, for rotating the rotating shaft. The pulverization configured to pulverize the material to be crushed from the hopper by the cooperation of the crushing blade and the rotary blade and the fixed blade by rotating the crushing blade and the rotary blade in conjunction with each other. In the machine
The housing is disposed in close contact between the front and rear walls and the front and rear walls arranged at a predetermined interval, and can be tilted outward with the lower end as a fulcrum. With left and right doors,
A return case portion that externally covers the crushing blade is integrally formed on the inner surfaces of the left and right open / close doors facing the crushing blade, and the return case portion is formed by opening and closing the left and right opening / closing doors. In a state where the door is closed, the lower end portions of these return case portions are joined together, and a part of the crushed object crushed by the crushing blade is removed from the upper end portion of the return case portion of one of the doors. The crusher is characterized in that it is structured to guide and regulate to the upper end portion of the return case portion of the other opening / closing door. In claim 1,
A crusher, wherein a chamfer is formed at an upper end corner portion of the lower end portion of the return case portion. In claim 2,
The crusher characterized by the above-mentioned chamfered upper end corner | angular part forming the inclined surface which goes down toward the said rough crushing blade side.

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