JP2005296702A - Crushing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crushing device capable of certainly crushing an object to be crushed and realizing low cost. <P>SOLUTION: This crushing device 1 is provided with first and a second rotation bodies 3a, 3b; and a motor 9. The first and second rotation bodies 3a, 3b have a plurality of approximately plate-like rotation blades 5a, 5b and the respective rotation blades 5a, 5b are arranged so as to be alternately fitted to each other. A guide means 23 provided with an approximately horizontal guide surface is provided below an area where the rotation blades 5a, 5b are fitted to each other and fixed blades 25a, 25b projected to the first and second rotation bodies 3a, 3b are provided at both sides thereof. A chip passed through the first and second rotation bodies 3a, 3b is abutted on the guide means 23 and attitude is changed. Then, the chip is guided to the fixed blades 25a, 25b along the guide surface and is crushed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention belongs to a technical field including a crushing device for crushing metal chips and the like generated by cutting.

  In the state as it is, the chips generated by metal cutting have a very low apparent specific gravity and a large bulk. For this reason, measures such as crushing the chips finely and reducing the volume using a crushing device are implemented.

  Generally, the crushing device includes a pair of rotating bodies in which substantially disk-shaped rotating blades and collars are alternately inserted through a rotating shaft. By inserting the rotary blade of one rotary body between the rotary blades of the other rotary body, the rotary blades of both rotary bodies are arranged alternately. When crushing chips, the pair of rotating bodies are rotated in opposite directions, and the chips introduced from above are drawn between the rotating bodies. Then, the chips are crushed and become fine chips that are discharged from below.

  However, even if the chips are relatively large, there is a risk that they will enter the gap between the rotating bodies along the outer periphery of the rotary blade or collar and pass between the rotating bodies without being crushed. .

As a countermeasure against this slipping, for example, it is conceivable that two pairs of rotating bodies are arranged in two upper and lower stages, and chips that have passed through the first stage are crushed in the second stage (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 5-32194

  The occurrence of slip-through is particularly a concern when chips having an approximately ribbon-like shape enter between the two rotating bodies with the longitudinal direction thereof set in the vertical direction. In the crushing device provided with the two pairs of rotating bodies, as described above, when the elongated chips pass through the first stage, the chips fall to the second stage with the longitudinal direction thereof set in the vertical direction. For this reason, even in the second stage, chips may enter between the rotating bodies along the outer periphery of the rotary blade or collar, and may slip through again.

  Also, providing two pairs of rotating bodies may increase the manufacturing cost of the crushing device.

  This invention is made | formed in view of the said situation, The objective is to provide the crushing apparatus which can crush to-be-crushed material more reliably and can aim at cost reduction.

  In the following, each means suitable for solving the above-mentioned purpose will be described in terms of items. In addition, the effect etc. peculiar to the means to respond | correspond as needed are added.

  Means 1. A pair of rotating bodies having a plurality of rotating blades, and driving means for driving the rotating bodies to rotate inside each other so that the rotating blades are alternately fitted into the pair of rotating bodies. A crushing device arranged, wherein the object to be crushed is placed between the fixed blades provided below the rotary members and the fixed blades below the region where the rotary blades are alternately fitted. A crushing apparatus comprising a guide means having a guide surface for guiding to the surface.

  According to the means 1, the crushing apparatus includes a pair of rotating bodies and driving means. Each of the pair of rotating bodies has a plurality of rotating blades, and is arranged so that the rotating blades are alternately fitted. In addition, when the pair of rotating bodies is rotated by the driving means, the object to be crushed from above the rotating bodies is sandwiched between the rotating blades. At this time, a shearing force acts and the material to be crushed is crushed. The crushed object to be crushed is dropped to guide means provided below the rotating body. By the way, there is a concern that the object to be crushed is simply sandwiched between the pair of rotating bodies and passes through the rotating bodies without being sufficiently crushed. Even in such a case, the means 1 suppresses the inconvenience that the object to be crushed is received as it is by being received by the guide surface. Further, the object to be crushed hits the guide surface or the object to be crushed already dropped on the guide surface, and is guided toward the fixed blade. Then, the guided object to be crushed is sandwiched between the fixed blade and the rotary blade and crushed. Therefore, the object to be crushed can be reliably crushed. In addition, as a countermeasure for slipping through the object to be crushed, a simple configuration is provided in which only guide means and a fixed blade are provided. For this reason, cost reduction of the crushing device can be achieved. In each means, “insertion” means that the rotating blades of both rotating bodies may be in contact with each other without a gap, or may be arranged with a gap of a predetermined interval.

  Mean 2. A pair of rotary bodies in which a plurality of substantially plate-like rotary blades and a plurality of collars are alternately provided at a predetermined pitch with respect to the rotary shaft, and drive means for driving the rotary shaft to rotate inward with respect to each other. And a crushing device in which the pair of rotating bodies are arranged so that the rotating blades are alternately fitted with each other, and constitutes a bottom wall below a region in which the rotating blades are fitted with each other. A crushing apparatus, comprising: guide means having a horizontal guide surface; and fixed blades fixed on both sides of the guide means when viewed in the direction of the rotation axis of the pair of rotating bodies.

  According to the means 2, basically the same effect as the means 1 is exhibited. In addition, the object to be crushed that has fallen on the substantially horizontal guide surface is guided toward the fixed blade along the guide surface by being pushed by the object to be crushed and the rotary blade. Then, the guided object to be crushed is sandwiched between the fixed blade and the rotary blade and crushed.

  Means 3. The crushing apparatus according to claim 1 or 2, wherein the guide means is capable of changing a posture of an object to be crushed that is at least a predetermined length.

  According to the means 3, when the object to be crushed that has passed through between the rotating bodies is at least a predetermined length or longer, it strikes the guide surface of the guide means, and its posture (direction, bending degree, etc.) is changed. Then, the object to be crushed is guided toward the fixed blade in a state where the posture is changed. For this reason, when the object to be crushed moves between the fixed blade and the rotary blade, the posture is changed, so that the shearing force works more reliably, and the object to be crushed is reliably crushed. be able to. Instead of “at least the predetermined length or more”, “at least the vertical separation distance between the rotation axis and the guide surface in the vertical direction” may be used. When an object to be crushed longer than the distance passes through, the tip of the object reaches the guide surface while being sandwiched between the rotating bodies. For this reason, a to-be-crushed object is pressed reliably and the posture is changed.

  Means 4. The crushing apparatus according to any one of means 1 to 3, wherein the guide means is disposed at a predetermined interval with respect to the rotating body so that the rotating body does not contact.

  According to the means 4, the rotating body does not contact the guide means. For this reason, even if a softer material than the rotary blade is used as the guide means, there is no problem with respect to crushing. Therefore, the cost can be significantly reduced as compared to using a hard material equivalent to the rotary blade as the guide means. Further, the guide means and the rotating body are arranged at a predetermined interval, and a relatively wide space is formed between the guiding means and the rotating body above the guiding means. For this reason, when an object to be crushed having a predetermined length or more slips through, it is easily changed to a posture suitable for crushing with a fixed blade in the space. Therefore, crushing with a fixed blade can be performed more reliably. It should be noted that instead of “with a predetermined interval”, the height may be “approximately the same height as the lowest point of the rotating body”. Also in this case, the same effects as described above can be obtained.

  Means 5. The crushing apparatus according to any one of means 1 to 4, wherein each of the fixed blades is configured such that an upper end thereof protrudes upward from at least a substantially plane of the guide means.

  According to the means 5, the fixed blade is protruded above the substantially plane of the guide means. Therefore, the object to be crushed can be sandwiched between the fixed blade and the rotary blade, and the object to be crushed can be crushed by the shearing force generated when the object to be crushed is sandwiched.

  Means 6. The crushing apparatus according to claim 5, wherein each of the fixed blades has a substantially comb-like shape.

  According to the means 6, since the fixed blade has a substantially comb-tooth shape, it can be provided adjacent to the rotary blade with almost no gap. For this reason, the object to be crushed can be more reliably crushed by the fixed blade.

  Mean 7 The crushing apparatus according to any one of means 1 to 6, wherein the fixed blade is provided only at the lowest position of the rotary blade or in the vicinity thereof.

  As the fixed blade and the rotary blade, a relatively hard material is generally used in order to ensure more reliable crushing. On the other hand, adopting such a hard material may significantly increase the cost. In this regard, according to the means 7, the fixed blade is provided only at the lowest position of the rotary blade or a narrow range in the vicinity thereof. For this reason, a fixed blade becomes a comparatively small thing and the manufacturing cost of a fixed blade can be reduced significantly. Therefore, the cost of the crushing device can be reduced.

  Means 8. The crushing apparatus according to any one of means 1 to 7, wherein the rotary blade and the fixed blade are made of a steel material having a Rockwell hardness (C scale) HRC of 50 or more.

  According to the means 8, the rotary blade and the fixed blade are made of a steel material having a Rockwell hardness of HRC50 or more. For this reason, for example, even a relatively hard object to be crushed, such as chips generated during metal cutting, can be crushed. The Rockwell hardness is preferably HRC55 or more and HRC63 or less.

  Means 9. The crushing apparatus according to any one of means 1 to 8, wherein the guide means is made of a steel material having a Rockwell hardness (B scale) HRB of 70 or less.

  According to the means 9, the guiding means is made of a relatively soft steel material having a Rockwell hardness of HRB 70 or less. In general, a relatively hard steel material is expensive, and a relatively soft steel material is inexpensive. For this reason, by adopting a relatively soft steel material as the guiding means, the cost of the crushing apparatus as a whole can be reduced.

  Hereinafter, an embodiment will be described with reference to the drawings. The crushing apparatus in the present embodiment is for crushing chips as a material to be crushed that is generated when a metal such as aluminum is cut.

  As shown in FIGS. 1 and 2, the crushing device 1 includes a case 2 that is open at the top, and a first rotating body 3 a and a second rotating body 3 b that are provided inside the case 2. The first rotating body 3a and the second rotating body 3b include first and second rotating shafts 4a and 4b, a plurality of disk-shaped rotating blades 5a and 5b, and a plurality of collars 6a and 6b, respectively. .

  The first and second rotation shafts 4a and 4b are arranged such that their rotation axes are parallel to each other on the same horizontal plane. The first and second rotating shafts 4a and 4b protrude from the case 2, and gears 8a and 8b are attached to one end sides thereof. The gear 8a of the first rotating shaft 4a and the gear 8b of the second rotating shaft 4b have different numbers of teeth and mesh with each other. On the other hand, the motor 9 is connected to the other end side of the first rotating shaft 4a. Then, when the motor 9 is driven, the first rotating shaft 4a is rotated. Along with the rotation of the first rotation shaft 4a, the second rotation shaft 4b is rotated in the direction opposite to the rotation of the first rotation shaft 4a, particularly inward in the present embodiment. Therefore, at the time of crushing, the first and second rotating bodies 3a and 3b are rotated in directions in which the upper portions are close to each other. Thereby, chips are fed between the first and second rotating bodies 3a, 3b.

  The rotary blades 5a and 5b and the collars 6a and 6b are alternately fitted and fixed to the first and second rotary shafts 4a and 4b. Accordingly, the rotary blades 5a and 5b and the collars 6a and 6b are rotated inward with each other as the first and second rotating shafts 4a and 4b rotate.

  Furthermore, the rotary blades 5a and 5b have a larger diameter than the collars 6a and 6b. The thickness of the rotary blade 5a of the first rotary body 3a (length in the rotation axis direction) is configured to be substantially equal to the thickness of the collar 6b of the second rotary body 3b. Similarly, the thickness of the rotary blade 5b of the second rotary body 3b is configured to be substantially equal to the thickness of the collar 6a of the first rotary body 3a. In the present embodiment, the rotary blades 5a and 5b have the same thickness. The first and second rotating bodies 3a and 3b are provided with almost no gap. Thereby, the rotary blades 5a and 5b of one rotary body 3a and 3b are fitted between the adjacent rotary blades 5a and 5b of the other rotary body 3a and 3b.

  A plurality of blade portions 13a and 13b projecting outward are formed on the outer peripheral edges of the rotary blades 5a and 5b (see FIG. 3). The blade portions 13a and 13b have a substantially quadrangular prism shape as a whole, and holding surfaces 15a and 15b and receiving surfaces 16a, which are substantially perpendicular to the rotational tangential direction, respectively, on the rotation direction side and the rotation direction opposite side. 16b. Further, the outer peripheral edge sides of the pressing surfaces 15a and 15b slightly protrude in the rotation direction side, and the outer peripheral edge sides of the receiving surfaces 16a and 16b slightly protrude in the rotation direction opposite side. Further, due to the presence of the blade portions 13a and 13b, concave portions 17a and 17b having a substantially U shape are formed between the adjacent blade portions 13a and 13b when viewed in the rotation axis direction. In the present embodiment, the maximum depth H of the recesses 17a and 17b is formed substantially equal to the minimum width L in the rotation direction of the blade portions 13a and 13b, and the opening width X on the outer peripheral edge side of the recesses 17a and 17b. However, it is comprised so that it may become narrower than the width | variety Y of the inner peripheral side.

  The material of the rotary blades 5a and 5b and the collars 6a and 6b is preferably a material having a Rockwell hardness (C scale) HRC50 or higher. Further, it is preferably a material having a Rockwell hardness of HRC55 or more and HRC63 or less, and for example, steel SK3, die steel, or the like is suitably employed.

  An upper portion of the case 2 is provided with a substantially flat guide portion 18 for closing a gap formed between the case 2 and the first rotating body 3a and the second rotating body 3b. The guide portion 18 is configured to extend in parallel with the rotation axis of the first and second rotation shafts 4a and 4b and project toward the first rotation body 3a and the second rotation body 3b.

  Below the case 2 is provided a bottom plate 22 as a saw-like bottom wall having a plurality of drop holes 21 for discharging crushed and finely cut chips to a hopper (not shown). The bottom plate 22 is disposed slightly below the lowest point of the first and second rotating bodies 3a and 3b. Thereby, the 1st and 2nd rotary bodies 3a and 3b are prevented from contacting the bottom plate 22 directly. In the bottom plate 22, below the area where the rotary blade 5a of the first rotary body 3a and the rotary blade 5b of the second rotary body 3b are fitted, the drop hole 21 is not provided and has a substantially horizontal guide surface. A substantially flat guide means 23 is provided. As the material of the bottom plate 22, a material having a Rockwell hardness (B scale) HRB of 70 or less is sufficient. For example, SS400 made of steel is suitably employed. Further, a material having a Rockwell hardness of HRB 60 or more and HRB 70 or less is preferable.

  Fixed blades 25a and 25b protruding upward from the bottom plate 22 are fixed to the bottom plate 22 by bolts (not shown) on both sides of the guide means 23 (left and right direction in FIG. 2). In the present embodiment, the fixed blades 25a and 25b are disposed in the vicinity of the lowest points of the first rotating body 3a and the second rotating body 3b, respectively. The fixed blades 25a and 25b extend in parallel to the rotation axes of the first and second rotation shafts 4a and 4b. Furthermore, as shown in FIG. 4, the fixed blades 25a and 25b are comb-shaped. As a result, the fixed blades 25a and 25b are adjacent to the first rotating body 3a and the second rotating body 3b, respectively, with almost no gap. In addition, as a material of the fixed blades 25a and 25b, a material having a Rockwell hardness (C scale) HRC of 50 or more is preferable like the rotary blades 5a and 5b. Further, it is preferably a material having a Rockwell hardness of HRC55 or more and HRC63 or less, and for example, steel SK3 or die steel is adopted.

  Here, using the crushing apparatus 1 configured as described above, the procedure for crushing chips and the operation effect at that time will be described.

  First, the first rotating shaft 3a (and the second rotating shaft 3b) is rotated by driving the motor 9. Along with this, the first rotating body 3a and the second rotating body 3b are rotated. During the rotation, the first rotating body 3a and the second rotating body 3b rotate at different speeds depending on the number of teeth of the gears 8a and 8b.

  Then, the chips introduced into the case 2 from above the crushing device 1 are moved from the upper side of the first and second rotating bodies 3a, 3b to the side by the pressing surfaces 15a, 15b of the blade portions 13a, 13b. It is done. That is, the blades 13a and 13b are fed between the first rotating body 3a and the second rotating body 3b. At this time, at least a part of the moved chips enters the recesses 17a and 17b of the blade portions 13a and 13b. Moreover, since the outer peripheral edge side of the pressing surfaces 16a and 16b slightly protrudes in the rotation direction side, a part of the chips can be hooked and moved on the outer peripheral edge side. Therefore, chips can be moved efficiently. On the other hand, since the outer peripheral edge side of the receiving surfaces 17a and 17b protrudes in the direction opposite to the rotation direction, it is possible to suppress a situation in which chips slip on the receiving surfaces 17a and 17b and escape to the outside of the blade portion. Therefore, the chips can be reliably supported and the chips can be moved more reliably.

  Further, the recesses 17a and 17b are substantially U-shaped, and the maximum depth H is relatively deep. At the same time, the receiving surfaces 16a and 16b are configured substantially perpendicular to the rotational tangential direction. Therefore, the volume of the recesses 17a and 17b can be increased compared to the case where the recess has a substantially letter shape and the receiving surface is gently inclined with respect to the rotational tangential direction. Many chips can be accommodated inside. Therefore, many chips can be moved efficiently. Moreover, the outer peripheral side opening width of the recessed parts 17a and 17b is narrower than the inner peripheral side opening width. For this reason, it is difficult for the chips once entering the recesses 17a and 17b to escape to the outside (outer peripheral side) of the recesses 17a and 17b. Therefore, the chips that have entered the recesses 17a and 17b can be reliably moved.

  When the blade portions 13a and 13b (recesses 17a and 17b) of one of the rotating bodies 3a and 3b are moved inward, the blade portions 13a and 13b and the collars 6a and 6b of the other rotating body 3a and 3b pass each other. Become. At this time, the chips moved along with the blade portions 13a and 13b (recesses 17a and 17b) of the one rotating body 3a and 3b are sandwiched between the first and second rotating bodies 3a and 3b. Chips are crushed by the shearing force generated at this time. Further, the receiving surfaces 16a and 16b of the blade portions 13a and 13b are inclined so that the outer peripheral side thereof becomes the lower side while rotating at least 90 degrees laterally from the uppermost point of the first and second rotating bodies 3a and 3b. There is nothing to do. For this reason, in the said rotation area, the situation where a chip | tip slides on the receiving surfaces 16a and 16b and escapes out of the recessed parts 17a and 17b does not arise easily. Furthermore, even when the chips are crushed, the chips can be reliably supported by the receiving surfaces 16a and 16b. For example, the chips supported by the receiving surfaces 16a and 16b of one rotating body 3a and 3b may be crushed when passing over the pressing surfaces 15a and 15b of the other rotating body 3a and 3b. Even in this case, it is possible to suppress a problem that the chips are pushed by the other pressing surfaces 15a and 15b and escape to the outside of the recesses 17a and 17b. Therefore, chips can be more reliably crushed. Furthermore, the crushed chips are dropped downward by rotating the first and second rotating bodies 3a and 3b.

  By the way, for example, a substantially ribbon-shaped elongated chip enters between the first and second rotating bodies 3a and 3b along the outer circumferences of the rotary blades 5a and 5b and the collars 6a and 6b with the longitudinal direction thereof set to the vertical direction. In such a case, there is a concern that the first rotary body 3a and the second rotary bodies 3a and 3b may enter the gap between the first and second rotary bodies 3a and 3b without being sufficiently crushed. Even in such a case, in the present embodiment, it is possible to suppress the problem that the chips that have passed through are once received by the guide means 23 and discharged as they are. Further, if the slipped chips are at least a predetermined length or more, they are not simply dropped, but are pressed toward the guide means 23 or the chips previously dropped on the guide means 23. In this embodiment, if the length of the chips is longer than at least the vertical distance between the center line of the rotation shafts 6a and 6b and the guide surface of the guide means 23, the chips that pass through are the first and second rotating bodies. In a state of being sandwiched between 3a and 3b, the tip reaches the guide means 23 and is pressed. As a result, the slipped and slender chips are bent or changed in direction. For this reason, the elongated chips are likely to be changed to a posture in which slip-through is unlikely to occur, which is different from the posture along the outer periphery of the rotary blades 5a, 5b and the collars 6a, 6b that are likely to slip through.

  Further, the chips dropped on the guide means 23 are pushed out by the chips that are subsequently dropped or pushed by the blade portions 13a and 13b that are rotating and moving along the guide surface. Can be moved in the left-right direction. That is, it is guided toward the fixed blades 25a and 25b. At this time, the finely crushed chips are discharged from the drop hole 21 provided in the bottom plate 22 to the hopper. However, the chips that pass between the fixed blades 25a, 25b and the first and second rotating bodies 3a, 3b are crushed again here. In addition, since there is very little difference in height between the substantially comb-shaped depressions of the fixed blades 25a and 25b and the guide surface of the guide means 23, the chips are smoothly transferred from the guide means 23 to the fixed blades 25a and 25b. Moved to. Then, the moved chips are crushed by the shearing force generated when sandwiched between the fixed blades 25a and 25b and the blade portions 13a and 13b or between the fixed blades 25a and 25b and the collars 6a and 6b. Further, relatively large chips are unlikely to fall from the drop hole 21, and are reliably guided to the fixed blades 25a and 25b and crushed. In addition, about the said elongate chip, since the posture is changed, a shearing force will act more reliably and it can be made to crush reliably. And since the chips which have passed through the fixed blades 25a and 25b are finely crushed, they are discharged from the drop hole 21 to the hopper.

  As described above in detail, in the present embodiment, the chips are not easily crushed between the first rotator 3a and the second rotator 3b, and the chips are relatively large. Also, the chips are received by the lower guide means 23. For this reason, the malfunction that chips are discharged to the hopper while being relatively large can be suppressed.

  At the same time, the chips dropped on the guide means 23 are guided toward the fixed blades 25a and 25b along the guide surface of the guide means 23 by being pressed by the object to be crushed and the rotary blade that are subsequently dropped. The Then, the guided chips can be crushed by the fixed blades 25a and 25b and the rotary blades 5a and 5b. That is, even after passing the sides of the first and second rotating bodies 3a and 3b, the guide means 23 and the fixed blades 25a and 25b are provided below the first and second rotating bodies 3a and 3b. Chips can be crushed only by providing a simple configuration comprising:

  Moreover, the rotary blades 5a and 5b do not directly contact the guide means 23. For this reason, a relatively soft material can be employed instead of a hard material used for the rotary blades 5a, 5b and the like. Moreover, since the fixed blades 25a and 25b are provided only in a relatively narrow range only in the vicinity of the lowest point of the first and second rotating bodies 3a and 3b, the fixed blades 25a and 25b are relatively small. . In general, a relatively hard steel material is expensive, and a relatively soft steel material is inexpensive. For this reason, the guide means 23 can be manufactured at low cost, and the manufacturing cost of the fixed blades 25a and 25b can be significantly reduced. Therefore, further cost reduction of the crushing apparatus 1 can be achieved by a simple configuration and a reduction in manufacturing cost.

  Further, when the object to be crushed through the rotating body is relatively long, it is pressed against the guide means 23 or the chips previously dropped on the guide means 23. Thereby, the state of the chip (direction, degree of bending, etc.) is changed. Then, the chips are guided toward the fixed blades 25a and 25b in a state where the posture is changed. For this reason, when the chips pass between the fixed blades 25a and 25b and the rotary blades 5a and 5b, the posture is changed, so that the shearing force works more reliably, and the chips are surely removed. Can be crushed.

  Due to the synergistic effect of the above action, the chips that are sufficiently finely crushed are discharged to the hopper, and it is possible to suppress the problem that the chips are discharged while being large.

  In the embodiment described above, for example, a part of the configuration can be appropriately changed as follows. Of course, other modifications not exemplified below are also possible.

  (A) The object of crushing in the crushing apparatus 1 is not limited to metal, and may be made of other materials such as resin and paper. Moreover, it may not be a chip, for example, you may use in order to crush an aluminum can, industrial waste, etc.

  (B) The number of teeth of the gear 8a of the first rotating shaft 4a and the number of teeth of the gear 8b of the second rotating shaft 4b may be the same.

  (C) The guide portion 18 may have a comb blade shape matching the dimensions of the fixed blades 25a and 25b and the collars 6a and 6b. In this case, the gap formed between the first rotating body 3a and the second rotating body 3b can be reliably closed.

  (D) The 1st rotating shaft 4a and the 2nd rotating shaft 4b do not necessarily need to be arrange | positioned on the same horizontal surface, and should just be on the same plane.

  (E) In the above embodiment, the guide surface of the guide means 23 is provided slightly below the lowest point of the first and second rotating bodies 3a, 3b, but must contact the rotating blades 5a, 5b. For example, it may be the same as or slightly above the lowest point of the first and second rotating bodies 3a and 3b.

It is a schematic diagram which shows the structure of the crushing apparatus in one Embodiment, Comprising: It is JJ sectional drawing of FIG. It is a top view which shows the structure of the crushing apparatus. It is a partial expansion perspective view of a rotary blade. It is a figure which shows the shape of a fixed blade, Comprising: (a) is a side view, (b) is KK sectional drawing of (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Crushing device, 3a ... 1st rotary body, 3b ... 2nd rotary body, 4a ... 1st rotary shaft, 4b ... 2nd rotary shaft, 5a, 5b ... Rotary blade, 6a, 6b ... Collar, 9 ... Drive means 13a, 13b ... blade part, 15a, 15b ... pressing surface, 16a, 16b ... receiving surface, 17a, 17b ... recess, 22 ... bottom plate as bottom wall, 23 ... guide means, 25a, 25b ... fixed blade .

Claims (9)

A pair of rotating bodies having a plurality of rotating blades;
Driving means for driving the rotating bodies to rotate inward from each other;
A crushing device in which the pair of rotating bodies are arranged so that the rotating blades are alternately fitted with each other,
A fixed blade provided below each of the rotating bodies;
A crushing apparatus comprising a guide means including a guide surface for guiding a material to be crushed toward the fixed blade between the fixed blades below the region where the rotary blades are alternately fitted. A pair of rotary bodies in which a plurality of substantially plate-like rotary blades and a plurality of collars are alternately provided at predetermined pitches with respect to the rotation axis;
Driving means for driving the rotary shafts to rotate inside each other;
A crushing device in which the pair of rotating bodies are arranged so that the rotating blades are alternately fitted with each other,
Under the area where the rotary blades fit together, the bottom wall is configured, and a guide means having a substantially horizontal guide surface;
A crushing apparatus comprising a fixed blade fixed to both sides of the guide means when viewed in the direction of the rotation axis of the pair of rotating bodies.   The crushing apparatus according to claim 1 or 2, wherein the guiding means is capable of changing a posture of an object to be crushed that is at least a predetermined length.   The crushing apparatus according to any one of claims 1 to 3, wherein the guide means is disposed at a predetermined interval with respect to the rotating body so that the rotating body does not contact.   The crushing apparatus according to any one of claims 1 to 3, wherein each of the fixed blades is configured such that an upper end thereof protrudes upward at least from a substantially flat surface of the guide means.   The crushing device according to claim 5, wherein each of the fixed blades has a substantially comb-tooth shape.   The crushing device according to any one of claims 1 to 6, wherein the fixed blade is provided only at the lowest position of the rotary blade or in the vicinity thereof.   The crushing apparatus according to any one of claims 1 to 7, wherein the rotary blade and the fixed blade are made of a steel material having Rockwell hardness (C scale) HRC50 or higher.   The crushing apparatus according to any one of claims 1 to 8, wherein the guide means is made of a material having a Rockwell hardness (B scale) HRB of 70 or less.

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