WO2023017665A1 - 回転式破砕装置 - Google Patents

回転式破砕装置 Download PDF

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Publication number
WO2023017665A1
WO2023017665A1 PCT/JP2022/022677 JP2022022677W WO2023017665A1 WO 2023017665 A1 WO2023017665 A1 WO 2023017665A1 JP 2022022677 W JP2022022677 W JP 2022022677W WO 2023017665 A1 WO2023017665 A1 WO 2023017665A1
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WO
WIPO (PCT)
Prior art keywords
thick plate
rotary
crushing device
flange
impact
Prior art date
Application number
PCT/JP2022/022677
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English (en)
French (fr)
Japanese (ja)
Inventor
野川聖樹
三宅隆誠
秋山巧真
Original Assignee
日本国土開発株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本国土開発株式会社 filed Critical 日本国土開発株式会社
Priority to JP2023541228A priority Critical patent/JPWO2023017665A1/ja
Publication of WO2023017665A1 publication Critical patent/WO2023017665A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/14—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices
    • B02C13/16—Disintegrating by mills having rotary beater elements ; Hammer mills with vertical rotor shaft, e.g. combined with sifting devices with beaters hinged to the rotor

Definitions

  • the present invention relates to a rotary crusher.
  • a rotary crushing (mixing) method for improving and effectively utilizing construction soil, etc., and equipment used in the method are known (see, for example, Patent Document 1, etc.).
  • the rotary crushing (mixing) method uses a processing device equipped with an impact applying member (impact member) that rotates at high speed inside a cylindrical container. It is a method of crushing and refining, and has the effect of making the material a smooth particle size distribution.
  • lime-based solidifying materials such as quicklime and slaked lime
  • cement-based solidifying materials such as ordinary cement and blast furnace cement
  • soil improvement materials made of polymer materials are mixed to improve the properties of the improved soil. and intensity can be adjusted. Construction-generated soil is conveyed to the inlet of the rotary crusher by a belt conveyor.
  • an impact member it is known that it has a thick plate member and a chain having one end connected to the thick plate member, and the other end of the chain is attached to a rotary drive member (rotating shaft). It is
  • the chain is long, so crushed objects such as construction soil often come into contact with the chain. As a result, the chain may wear out, leaving room for improvement in terms of durability.
  • an object of the present invention is to provide a highly durable rotary crusher.
  • the rotary crushing device of the first invention comprises a thick plate member that collides with and crushes the object to be processed using a rotational driving force from the rotary drive member, and the rotary drive member and the thick plate member. and a connection member that connects between and changes the attitude of the thick plate member with respect to the rotation drive member when the thick plate member collides with the processing object, wherein the rotation drive member connects the connection member It has a retaining flange member.
  • the rotary crushing apparatus of the second invention comprises a thick plate member that collides with and crushes the object to be processed using the rotational driving force from the rotary drive member, and the rotary drive member and the thick plate member.
  • a connecting member connecting between the first member and the first member to change the posture of the thick plate member with respect to the rotation driving member when the thick plate member collides with the processing object;
  • the first member connects the rotary drive member and the second member, and the second member connects the first member and the thick plate member.
  • the rotary crushing device of the first and second inventions can improve durability.
  • FIG. 4 shows a scraping bar provided within the rotating drum
  • FIG. 3(a) is a diagram showing a state in which four impact members provided on one flange member are viewed from above (+Z-axis direction)
  • FIG. 3(b) is one of the four impact members.
  • FIG. 10 is a diagram showing a state in which one is viewed from the -Y direction
  • FIGS. 4(a) to 4(d) are diagrams for explaining the movement when an impact is applied to the impact member.
  • FIGS. 5(a) to 5(c) are diagrams for explaining the movement when an impact is applied to the impact member according to the comparative example.
  • FIG. 6(a) is a view showing one of the impact members according to the second embodiment viewed from the +Z side
  • FIG. 6(b) is a view showing the impact member of FIG. It is a figure which shows the state seen from the direction.
  • FIGS. 7(a) and 7(b) are diagrams for explaining the movement when an impact is applied to the impact member of the second embodiment.
  • 8(a) to 8(c) are diagrams for explaining the impact member of the third embodiment.
  • 9(a) and 9(b) are diagrams for explaining the movement of the impact member of the fourth embodiment when an impact is applied.
  • 10(a) and 10(b) are diagrams for explaining a modification of the first embodiment.
  • FIG 11(a) is a view showing one of the impact members according to the fifth embodiment viewed from the -Y direction, and FIGS. It is a figure for demonstrating the modification of a form. It is the lower end part vicinity of the rotating shaft which concerns on 6th Embodiment, and is the schematic diagram which expanded the location in which two (2 steps
  • Figure 13 is an exploded view of Figure 12; It is a figure which shows the state which looked at the 1st structure of FIG. 12 from +Z direction. It is a figure for demonstrating the comparative example of 6th Embodiment.
  • FIGS. 16A and 16B are diagrams showing modifications of the first and second structures.
  • FIG. 1 schematically shows the configuration of a rotary crusher 100 according to the first embodiment.
  • a part is shown in cross section.
  • the vertical direction is shown as the Z-axis direction
  • two orthogonal directions in the horizontal plane are shown as the X-axis direction and the Y-axis direction.
  • the rotary crusher 100 of this embodiment is a device used to improve and effectively utilize raw material soil such as construction soil.
  • the rotary crusher 100 crushes and refines the raw material soil to give the raw material soil a gentle particle size distribution.
  • the rotary crusher 100 may optionally include additives (lime-based solidifying materials such as quicklime and slaked lime, cement-based solidifying materials such as ordinary cement and blast-furnace cement, or soil improving materials made of polymeric materials. , natural fibers, etc.) are also introduced.
  • additives limestone-based solidifying materials such as quicklime and slaked lime, cement-based solidifying materials such as ordinary cement and blast-furnace cement, or soil improving materials made of polymeric materials. , natural fibers, etc.
  • the additive mixes the raw material soil and the additive to prepare improved soil, thereby adjusting properties, strength, and the like of the improved soil.
  • the rotary crusher 100 includes a pedestal 10, a fixed drum 12, a rotating drum 14, a rotating mechanism 16, a belt conveyor 122, and the like.
  • the pedestal 10 holds each part of the rotary crusher 100, and has a top plate part 10a and leg parts 10b.
  • the top plate portion 10a is a plate-like member made of iron, for example, and has a function as a lid that closes the upper opening of the fixed drum 12 fixed to the lower surface (the surface on the -Z side).
  • An inlet member 20 is provided in the fixed drum 12 for charging raw material soil and additives. The material soil is conveyed to the inlet member 20 by the belt conveyor 122 .
  • the fixed drum 12 is a cylindrical container and is fixed to the lower surface (the surface on the -Z side) of the top plate portion 10a.
  • Raw material soil and additives are introduced into the fixed drum 12 through the inlet member 20, and the raw material soil and additives are introduced into the rotary drum 14 provided below the fixed drum 12 (-Z side). .
  • the rotary drum 14 is a cylindrical container, and is rotated (rotated) around the central axis of the cylinder (around the Z-axis) by a rotary drum drive motor (not shown). Since the rotating drum 14 is supported by the pedestal 10 via a plurality of supporting rollers 24, it receives the rotational force of the rotating drum driving motor 154 and rotates smoothly.
  • the rotating direction of the rotating drum 14 and the rotating direction of the impact member 34 which will be described later, may be the same rotating direction or opposite rotating directions.
  • one or a plurality of scrapers 22 are provided (not shown in FIG. 1).
  • the scraping bar 22 is in contact with the inner peripheral surface of the rotating drum 14 and is fixed to the fixed drum 12 . Therefore, the scraping bar 22 relatively moves along the inner peripheral surface of the rotating drum 14 by rotating the rotating drum 14 .
  • the scraping rod 22 and the rotary drum 14 that moves relative to the scraping rod 22 function as a scraping section for scraping off raw material soil and additives adhering to the inner peripheral surface of the rotary drum 14 . ing.
  • the rotating mechanism 16 includes a rotating shaft 30 extending in the vertical direction (Z-axis direction) disposed at the center of the fixed drum 12 and the rotating drum 14, and a pulley 32 provided at the upper end of the rotating shaft 30. , and an impact member 34 provided in two upper and lower stages in the vicinity of the lower end of the rotating shaft 30 .
  • the impact member 34 is fixed to two flange members 31 provided on the rotary shaft 30, and has a connection member 43 having a joint member 41 and a chain 42, and a thick plate member 40 (details later).
  • a function as a rotation driving member that applies a rotation driving force to the impact member 34 is realized by including the rotating shaft 30 and the flange member 31 .
  • the rotating shaft 30 is a columnar member, and is rotatable through two ball bearings 36a and 36b provided on the upper surface side of the top plate portion 10a in a state of penetrating the top plate portion 10a of the pedestal 10. It is held on the top plate portion 10a in this state.
  • a spacer 38 is provided between the two ball bearings 36a, 36b to form a predetermined gap between the ball bearings 36a, 36b.
  • the lower end of the rotating shaft 30 is located inside the rotating drum 14 and is a free end. That is, the rotating shaft 30 is supported by a cantilever.
  • the pulley 32 is connected to a motor (not shown) via a belt. When the motor (not shown) rotates, the pulley 32 and the rotating shaft 30 rotate.
  • the belt conveyor 122 conveys raw material soil to the inlet member 20 .
  • the belt conveyor 122 conveys raw material soil in the Y direction and the Z direction.
  • the belt conveyor 122 conveys the material soil from the back side of the paper toward the front side of the paper in the Y direction.
  • the belt conveyor 122 conveys the material soil from the bottom to the top in the Z direction.
  • the additive is conveyed to the inlet member 20 by a conveying mechanism (not shown).
  • FIG. 3(a) is a diagram showing a state in which four impact members 34 provided on one flange member 31 are viewed from above (+Z-axis direction).
  • 3(b) is a view showing one of the four impact members 34 (the impact member 34 at the 3 o'clock position in FIG. 3(a)) viewed from the -Y direction.
  • the four impact members are provided on the flange member 31 at regular intervals.
  • the impact member 34 includes a connection member 43 having a joint member 41 (first member) and a chain 42 (second member), and a thick plate member 40. , provided.
  • the joint member 41 is interposed between the flange member 31 and the chain 42 , and the chain 42 is interposed between the joint member 41 and the thick plate member 40 .
  • the joint member 41 is held by the flange member 31 so as to be rotatable around the Z-axis via a shaft 141a extending in the Z-axis direction.
  • the joint member 41 has a shaft 141b extending in a direction intersecting the Z-axis (in the case of the impact member 34 in FIG. 3B, the Y-axis direction), and one end of the chain 42 is connected to the shaft 141b. ing. That is, the joint member 41 has a rotation axis direction with respect to the flange member 31 and a rotation axis direction with respect to the chain 42 that differ from each other.
  • the chain 42 can change its attitude at least in the direction of rotation about the shaft 141b.
  • a thick plate member 40 is provided at the other end of the chain 42 .
  • the joint member 41 and chain 42 are made of metal, and the thick plate member 40 is made of steel.
  • the impact member 34 is connected to the rotary shaft 30, and is rotated centrifugally by the rotation of the rotary shaft 30.
  • the thick plate member 40 moves at high speed near the inner peripheral surface of the rotary drum 14, thereby crushing raw material soil and crushing the raw material. Mix with soil and additives. Therefore, the rotary crushing device 100 can also be called a rotary crushing and mixing device.
  • the number of impact members 34 can be adjusted according to the type and properties of raw material soil, the processing amount, the type and amount of additives, the target quality of improved soil, and the like.
  • raw material soil and additive materials charged into the fixed drum 12 through the inlet member 20 are crushed and mixed by the impact member 34 in the rotary drum 14, and It is designed to be discharged below 14.
  • the material soil falls from the inlet member 20 toward the impact member 34, and the material soil falls within the material soil drop range shown in FIG. 4(a).
  • the material soil hits the thick plate member 40 of the rotating impact member 34 and is pulverized.
  • the impact member 34 as a whole rotates about the shaft 141a as shown in FIG. 4(b).
  • the shape as shown in FIG. is inclined by an angle ⁇ 1 with respect to the direction (radial direction) connecting the center of the rotating shaft 30 and the center of the shaft 141a.
  • Comparative example 5(a) to 5(c) show an impact member 934 according to a comparative example. As shown in FIG. 5A , in the impact member 934 according to the comparative example, only the joint member 41 is provided between the thick plate member 40 and the flange member 31 .
  • the thick plate member 40 can be prevented from being deformed or bent.
  • the joint member 41 when the joint member 41 is rotated by 5°, it cannot be rotated any more, and when the angle between the longitudinal direction and the radial direction of the thick plate member 40 becomes about 6.5°, the thick plate member 40 is rotated. There is a risk of deformation.
  • the angle between the longitudinal direction and the radial direction of the thick plate member 40 can be changed by 7° to 30° or more, so that the thick plate member 40 is not deformed. The impact applied to the thick plate member 40 can be absorbed.
  • the rotary crushing device 100 uses the rotational driving force from the rotary shaft 30 to collide with the object to be treated (raw material soil) to crush the object to be treated.
  • a connection member 43 that connects between the plate member 40, the rotating shaft 30 and the thick plate member 40, and changes the posture of the thick plate member 40 with respect to the rotating shaft when the thick plate member 40 collides with the object to be processed; It has The connecting member 43 has a joint member 41 and a chain 42 , the joint member 41 connects the flange member 31 of the rotating shaft 30 and the chain 42 , and the chain 42 connects the joint member 41 and the thick plate member 40 . Connected.
  • the impact member 34 as a rigid body rotates around the shaft 141a.
  • the impact applied to the thick plate member 40 can be absorbed. Therefore, damage or the like of the impact member 34 can be suppressed.
  • the joint member 41 has two degrees of freedom, and the chain 42 has more degrees of freedom. As a result, even if a twisting force is applied to the thick plate member 40 , the force can be absorbed by the chain 42 .
  • the connecting member 43 since the connecting member 43 has the joint member 41 and the chain 42, the length of the chain 42 can be shortened compared to the case where the connecting member 43 is configured only by the chain 42. . As a result, the raw material soil is less likely to come into contact with the chain 42, so wear of the chain 42 is suppressed, and durability can be improved.
  • the rotating shaft 30 is in a cantilevered state, and the lower end portion of the rotating shaft 30 is a free end.
  • the length of the rotating shaft 30 can be shortened, so that the size of the rotary crusher 100 can be reduced.
  • the structure is simplified and maintenance is facilitated.
  • the impact member 34 is provided on the rotating shaft 30 in two stages above and below has been described. There may be. Also, the number of ball bearings that hold the rotating shaft 30 on the upper side of the top plate portion 10a may be one or three or more. Furthermore, at least one of the ball bearings 36a and 36b may be arranged below the top plate portion 10a.
  • FIG. 6(a) shows one of the impact members 134 according to the second embodiment (the impact member 134 present at the 3 o'clock position) viewed from the +Z side.
  • 6(b) shows the impact member 134 of FIG. 6(a) viewed from the -Y direction.
  • the impact member 134 of the second embodiment has a chain, similar to the impact member 934 (FIG. 5(a)) of the comparative example of the first embodiment. does not have 42.
  • the plate portions 142c and 142d are arranged in the X direction. It is characterized by its long axial length.
  • the impact member 134 moves around the Z-axis about the axis 141a as shown in FIGS. 7(a) and 7(b). Even if it rotates 45 degrees or 90 degrees, the joint member 41 and the flange member 31 will not contact.
  • the entire impact member 134 can largely rotate around the shaft 141a, thereby absorbing the impact. It has become. As a result, deformation and breakage of the thick plate member 40 can be suppressed, and durability is improved.
  • a chain may be provided between the joint member 41 and the thick plate member 40 in the second embodiment.
  • FIG. 8(a) shows the impact member 534 and the flange member 131 according to the third embodiment viewed from the +Z side.
  • the feature of the third embodiment is that the flange member 131 is provided with notches 131a at four locations. More specifically, as shown in FIG. 8(a), the flange member 131 has cutouts 131a at four locations so as to have a substantially cross-like shape, leaving a portion where the shaft 141a is provided. Note that the impact member 534 has the same configuration as the impact member 934 (FIG. 5A) of the comparative example of the first embodiment.
  • the impact member 534 can be rotated at an angle of 45° or 90° around the Z-axis about the axis 141a as shown in FIGS. 8(b) and 8(c). Even if they rotate, the joint member 41 and the flange member 131 do not come into contact with each other. That is, contact between the joint member 41 and the flange member 131 is suppressed by the notch portion 131a.
  • the entire impact member 534 can largely rotate about the shaft 141a to absorb the impact. As a result, deformation and breakage of the thick plate member 40 can be suppressed, and durability is improved.
  • the impact member 134 described in the first embodiment may be provided for the flange member 131 .
  • FIG. 9(a) shows the impact member 234 according to the fourth embodiment viewed from the +Z side
  • FIG. 9(b) shows the impact member 234 viewed from the -Y direction. It is
  • the impact member 234 of the fourth embodiment has a joint member 41 ′ having the same configuration as the joint member 41 and a joint member 241 instead of the chain 42 of the first embodiment.
  • the joint member 41' has an axis 141a' extending in the Z-axis direction and an axis 141b' extending in the Y-axis direction in the state of FIGS. 6(a) and 6(b). Further, the joint member 241 engages with the shaft 141b of the joint member 41 and also with the shaft 141a' of the joint member 41'.
  • the combination of the joint member 41' and the joint member 241 is Since it has the same degree of freedom as the chain 42, it is possible to obtain the same effects as in the first embodiment. That is, even if a large impact is applied to the thick plate member 40, the impact can be absorbed by the rotation of the impact member 234 about the axis 141a and the change in shape. Thereby, deformation and breakage of the thick plate member 40 can be suppressed.
  • FIG. 11(a) shows one of the impact members 334 according to the fifth embodiment viewed from the -Y direction.
  • the impact member 334 of the fifth embodiment is characterized in that the joint member 41 of the first embodiment is changed to a joint member 341 .
  • the flange member 31 has an upper flange member 31A and a lower flange member 31B.
  • a single plate member 341a is provided on the rotating shaft 30 side of the joint member 341 .
  • a through hole 342 is formed through the plate member 341a in the Z-axis direction.
  • the joint member 341 is rotatably supported around the Z-axis in a state in which a shaft 345 (bolt or the like) provided on the upper flange member 31A and the lower flange member 31B passes through a through hole 342 of the plate member 341a. be. If a bolt is used as the shaft 345, the impact member 334 can be attached to and detached from the upper flange member 31A and the lower flange member 31B. In this case, replacement of the impact member 334 is facilitated.
  • a shaft 345 bolt or the like
  • a flange member 31 having an upper flange member 31A and a lower flange member 31B as shown in FIG. 11(a) can be employed is the same in embodiments other than the first embodiment.
  • the flange member 131 of the third embodiment has an upper flange member 131A and a lower flange member 131B as shown in FIGS. 11(b) and 11(c).
  • the joint member 41 (plate member 541a) of the impact member 534 may be held by the shaft 345 between the side flange members 131B.
  • the end of the joint member 41 has two members above and below the flange member 31 , and these two members are engaged with the flange member 31 via the shaft 141 .
  • the end of the joint member 341 is one member (plate member 341a ) is engaged with the flange member 31 . Therefore, the weight of the joint member 341 can be reduced, so that the weight of the impact member 334 can be reduced. Maintenance work such as replacement of the impact member 334 (for example, replacement of the joint member 341) can be facilitated.
  • the upper flange member 31A and the lower flange member 31B of the fifth embodiment can be applied to other embodiments.
  • FIG. 12 is an enlarged schematic diagram of a portion near the lower end of the rotating shaft 30 where two (two-stage) flange members 31 are provided. Also shown in FIG. 13 is an exploded view of FIG.
  • the rotating shaft 30 has a first structural body 70A, a spacer member (collar) 74, a second structural body 70B, a blade washer 76, and a nut 78 in order from the top (from the +Z direction). is provided.
  • the first structure 70A has, as shown in FIG. 13, an annular member 72 with a through hole 86 formed in the center, and a flange member 31 welded to the annular member 72.
  • FIG. 14 shows the first structural body 70A viewed from the +Z direction.
  • Two grooves 84 extending in the +Z direction are formed in the through hole 86 of the annular member 72 .
  • Four through holes 85 are formed in the flange member 31 .
  • the shaft 141 a of the joint member 41 of the impact member 34 passes through the through hole 85 , so that the impact member 34 is provided on the flange member 31 .
  • the spacer member 74 has a cylindrical shape, as shown in FIG. Spacer member 74 maintains the spacing between first structure 70A and second structure 70B.
  • the second structure 70B has the same configuration as the first structure 70A.
  • the nut 78 is screwed into a screw groove formed in the lowermost end of the rotary shaft 30 with the blade washer 76 interposed between the nut 78 and the second structure 70B.
  • the peripheral surface of the rotating shaft 30 is formed with two recesses 82a into which a key member (machine key) 80A can be fitted.
  • a portion of the key member 80A protrudes outward from the peripheral surface of the rotating shaft 30 when it is fitted into the recess 82a.
  • the number of key members for restricting the rotation of the first and second structures 70A, 70B is not limited to two, and may be one or three or more.
  • the flange member 31 is not bolted to the rotating shaft 30, the strength is improved and the frequency of maintenance and repair can be reduced.
  • the present invention is not limited to this.
  • four flange members 31S may be provided at equal intervals at four locations where the impact members 34 are provided.
  • eight flange members 31S may be provided at equal intervals as shown in FIG. 16(b). That is, the number of flange members 31S corresponding to the number of impact members 34 may be provided. This makes it possible to reduce the weight of the first and second structures 70A and 70B.
  • the flange member 31S is integrated with the annular member 72, it may be configured as a separate member from the annular member 72.
  • the flange member 31 has the upper flange member 31A and the lower flange member 31B as described in the fifth embodiment (FIG. 11(a)), good.
  • the upper flange member 31A and the lower flange member 31B may be provided on the annular member 72 of each of the first and second structures 70A and 70B.
  • the flange member may be the flange member 131 configured as shown in FIG. 8(a), FIG. 11(b), and FIG. 11(c).
  • the rotary crusher 100 of each of the above embodiments is not limited to a self-propelled processing system, but can also be applied to a plant-type processing system installed on site, an on-track processing system installed on the bed of a truck, and the like. It is possible to
  • the material to be crushed by the impact member 34 is not limited to raw material soil, but may be gravel or crushed stone, or may be mixed with raw material soil such as gravel or crushed stone. Also, the addition of the additive may be omitted. Also, the rotation shaft 30 may be supported by both ends instead of the cantilever. As described above, various modifications can be made without departing from the gist of the present invention.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Pulverization Processes (AREA)
PCT/JP2022/022677 2021-08-10 2022-06-03 回転式破砕装置 WO2023017665A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2023541228A JPWO2023017665A1 (enrdf_load_stackoverflow) 2021-08-10 2022-06-03

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Application Number Priority Date Filing Date Title
JP2021130473 2021-08-10
JP2021-130473 2021-08-10

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5322260U (enrdf_load_stackoverflow) * 1976-08-02 1978-02-24
JPH08215591A (ja) * 1995-02-10 1996-08-27 Kazuo Hirakawa 破砕装置
JPH10180129A (ja) * 1996-12-26 1998-07-07 U C Eco:Kk 破砕装置
JP2005193087A (ja) * 2003-12-26 2005-07-21 Jdc Corp 回転浮揚式打撃処理方法と回転浮揚式打撃処理装置
US20150034747A1 (en) * 2012-09-20 2015-02-05 Gary L. Watts Comminution mill with cable impact arms
WO2021145010A1 (ja) * 2020-01-15 2021-07-22 日本国土開発株式会社 回転式破砕装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5322260U (enrdf_load_stackoverflow) * 1976-08-02 1978-02-24
JPH08215591A (ja) * 1995-02-10 1996-08-27 Kazuo Hirakawa 破砕装置
JPH10180129A (ja) * 1996-12-26 1998-07-07 U C Eco:Kk 破砕装置
JP2005193087A (ja) * 2003-12-26 2005-07-21 Jdc Corp 回転浮揚式打撃処理方法と回転浮揚式打撃処理装置
US20150034747A1 (en) * 2012-09-20 2015-02-05 Gary L. Watts Comminution mill with cable impact arms
WO2021145010A1 (ja) * 2020-01-15 2021-07-22 日本国土開発株式会社 回転式破砕装置

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