(19)
(11)EP 2 957 354 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
11.04.2018 Bulletin 2018/15

(21)Application number: 13875203.5

(22)Date of filing:  15.02.2013
(51)International Patent Classification (IPC): 
B07B 1/22(2006.01)
B09B 3/00(2006.01)
B29B 17/02(2006.01)
B29L 31/48(2006.01)
B29B 17/04(2006.01)
B03B 9/06(2006.01)
B07B 9/00(2006.01)
B09B 5/00(2006.01)
B07B 1/24(2006.01)
B02C 23/10(2006.01)
B02C 21/00(2006.01)
(86)International application number:
PCT/JP2013/053703
(87)International publication number:
WO 2014/125615 (21.08.2014 Gazette  2014/34)

(54)

SEPARATION DEVICE

TRENNVORRICHTUNG

DISPOSITIF DE SÉPARATION


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(43)Date of publication of application:
23.12.2015 Bulletin 2015/52

(73)Proprietor: DAIKI CO., LTD.
Tokyo 107-0052 (JP)

(72)Inventors:
  • ITO, Hiroshi
    Tokyo 107-0052 (JP)
  • HATANAKA, Shinobu
    Tokyo 107-0052 (JP)
  • YOSHINAGA, Junji
    Tokyo 107-0052 (JP)
  • ANDO, Hiroyuki
    Mitoyo-shi Kagawa 767-0003 (JP)

(74)Representative: Isarpatent 
Patent- und Rechtsanwälte Behnisch Barth Charles Hassa Peckmann & Partner mbB Friedrichstrasse 31
80801 München
80801 München (DE)


(56)References cited: : 
JP-A- H06 230 606
JP-A- H06 285 431
JP-A- H08 117 688
JP-A- 2008 266 109
JP-A- H06 230 606
JP-A- H08 117 688
JP-A- 2000 350 944
US-A1- 2009 032 626
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    Technical Field



    [0001] The present invention relates to a separation device.

    Background Art



    [0002] An example of conventional separation devices is disclosed in Patent Document 1. In the separation device disclosed in this document, first, a defective piece of disposable diaper or the like in which a water-absorbent member is filled in an exterior material is cut into pieces of a predetermined size by a cutter. Then, the cut pieces are fed into a separator by pneumatic conveyance.

    [0003] The separator has a rotational shaft that is provided so as to be rotatable about its axis and a cylindrical mesh unit that surrounds the rotational shaft and that is provided so as to be rotatable concentrically with the rotational shaft in an opposite direction. The rotational shaft is provided with a plurality of stirring rods that are disposed radially. The cut pieces that are fed into this separator are divided into the exterior material and the water-absorbent member by the rotational axis and the cylindrical mesh unit rotating in mutually opposite directions. The water-absorbent member is sifted out by meshes of the cylindrical mesh unit.
    Patent Document 1: JP H8-117688A

    Summary of Invention


    Technical Problem



    [0004] As described above, according to this separation device, a water-absorbent resin or the like can be separated from a defective piece of disposable diaper or the like. However, conventional separation devices have room for improvement in terms of separation efficiency.

    [0005] The present invention was made in view of the above-described problems, and it is an object thereof to provide a separation device having a high separation efficiency.

    Solution to Problem



    [0006] A separation device according to the present invention includes a first shredding unit that shreds a processing target containing a first material and a second material adhering to the first material, a first separation unit that has a first tubular portion in which a large number of first holes that allow the second material contained in the processing target shredded by the first shredding unit to pass through without allowing the first material to pass through are formed, and that separates the second material passing through the first holes from the processing target by rotating the first tubular portion in a state in which the processing target shredded by the first shredding unit is accommodated in the first tubular portion, and a first ridge that is provided on an inner circumferential surface of the first tubular portion and that extends in a direction in which a central axis of the first tubular portion extends.

    [0007] In this separation device, the processing target containing the first material and the second material adhering to the first material is shredded by the first shredding unit. The processing target shredded by the first shredding unit is transferred to the first separation unit. In the first separation unit, the first tubular portion is rotated, and thus the second material dissociated from the first material is discharged to the outside of the first tubular portion through the first holes. As a result, the second material is separated from the processing target.

    [0008] Here, the first tubular portion is provided with the first ridge. If the first ridge is not provided, the processing target tends to collect in a lower portion of the first tubular portion due to the effect of gravity. In contrast, in the present invention, the processing target in the first tubular portion is scooped up by the first ridge and thus easily reaches an upper portion of the first tubular portion. Therefore, the processing target is distributed over a wide range of the inner circumferential surface of the first tubular portion, so that separation by the first separation unit is promoted. This contributes to an improvement in the separation efficiency of the separation device. Here, the separation efficiency refers to the ratio of the weight of the second material that is separated from the processing target to the weight of the second material that is contained in the processing target immediately before the processing.

    Advantageous Effects of Invention



    [0009] According to the present invention, a separation device having a high separation efficiency is realized.

    Brief Description of Drawings



    [0010] 

    FIG. 1 is a configuration diagram showing an embodiment of a separation device according to the present invention.

    FIG. 2 is a side view showing a separation unit 20 of the separation device in FIG. 1.

    FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2.

    FIG. 4 is a side view showing a separation unit 40 of the separation device in FIG. 1.

    FIG. 5 is a cross-sectional view taken along line V-V in FIG. 4.

    FIG. 6 is a side view showing a separation unit 60 of the separation device in FIG. 1.

    FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6.

    FIG. 8 is a cross-sectional view showing a transfer path 76 of the separation device in FIG. 1.

    FIG. 9 is a cross-sectional view showing a transfer path 78 of the separation device in FIG. 1.

    FIG. 10 is a cross-sectional view showing a transfer path 80 of the separation device in FIG. 1.

    FIG. 11 is a cross-sectional view for explaining a modification of a ridge 24 shown in FIG. 3.

    FIG. 12 is a cross-sectional view for explaining a modification of an uneven surface 77a and an uneven surface 77b shown in FIG. 8.

    FIG. 13 is a cross-sectional view for explaining a modification of the uneven surface 77a and the uneven surface 77b shown in FIG. 8.


    Description of Embodiments



    [0011] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the description of the drawings denotes like elements by like reference numerals and omits redundant descriptions.

    [0012] FIG. 1 is a configuration diagram showing an embodiment of a separation device according to the present invention. A separation device 1 processes a processing target containing a first material and a second material adhering to the first material, thereby dissociating the second material from the first material and separating the second material from the processing target. The processing target may be a defective piece of disposable diaper or sanitary napkin, for example. The present embodiment will be described using a case where the processing target is a disposable diaper, the first material is a plastic, and the second material is a water-absorbent polymer (including a highly water-absorbent polymer) as an example.

    [0013] The separation device 1 includes a shredding unit 10 (second shredding unit), a separation unit 20 (second separation unit), a shredding unit 30 (first shredding unit), a separation unit 40 (first separation unit), a shredding unit 50 (third shredding unit), and a separation unit 60 (third separation unit).

    [0014] The shredding unit 10 shreds a disposable diaper containing a plastic and a water-absorbent polymer adhering to the plastic into fragments. For example, a crusher or a grinder can be used as the shredding unit 10. Preferably, no screen is provided in the shredding unit 10.

    [0015] The structure of the separation unit 20 will be described with reference to FIGS. 2 and 3. FIG. 2 is a side view showing the separation unit 20. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. The separation unit 20 has a drum 22 (second tubular portion). The drum 22 has a substantially cylindrical tubular shape and is provided so as to be rotatable about its central axis. The central axis of the drum 22 extends horizontally. The inner diameter of the drum 22 may be between 30 cm and 50 cm inclusive, for example.

    [0016] A large number of holes 22a (second holes) are formed in the drum 22. The holes 22a are formed over substantially the entire drum 22. The holes 22a do not allow the plastic contained in the disposable diaper fragments shredded by the shredding unit 10 to pass through, but allow the water-absorbent polymer to pass through. The diameter of the holes 22a may be between 10 mm and 30 mm inclusive, for example. The separation unit 20 rotates the drum 22 in a state in which the disposable diaper fragments shredded by the shredding unit 10 are accommodated therein, thereby separating the water-absorbent polymer passing through the holes 22a from the disposable diaper fragments.

    [0017] A ridge 24 (second ridge) is formed on an inner circumferential surface of the drum 22. The ridge 24 extends in a direction in which the central axis of the drum 22 extends. The ridge 24 extends over substantially the entire path from an inlet side (left side of FIG. 2) to an outlet side (right side of FIG. 2) of the drum 22. Also, the ridge 24 has a substantially triangular cross-sectional shape. The height of the ridge 24 (length in a radial direction of the drum 22) may be between 5 mm and 2 cm inclusive, for example. Preferably, "q" (q: an integer between 3 and 5 inclusive) ridges 24 are provided. The "q" ridges 24 are arranged on the inner circumferential surface of the drum 22 at regular intervals. That is to say, in a cross section (cross section shown in FIG. 3) that is perpendicular to the central axis of the drum 22, an angle α that is formed by a line connecting one ridge 24 to the central axis and a line connecting the next ridge 24 to the central axis is substantially equal to 360°/q. In the present embodiment, q = 4 and α = 90°.

    [0018] A rotating rod 26 and a screw member 28 are provided inside the drum 22. The rotating rod 26 has a substantially cylindrical shape and is provided so as to be rotatable about its central axis. The central axis of the rotating rod 26 coincides with the central axis of the drum 22. However, the rotating rod 26 rotates independently of the drum 22. The outer diameter of the rotating rod 26 may be between 15 cm and 25 cm inclusive, for example.

    [0019] The screw member 28 is helically provided around the rotating rod 26. The screw member 28 is fixed to the rotating rod 26 and rotates together with the rotating rod 26. A plurality of teeth 29 are formed in the screw member 28. An end portion of each tooth 29 is constituted by a side 29a and a side 29b in a front view (see FIG. 3).

    [0020] The side 29a extends in the radial direction of the drum 22 and the rotating rod 26. An inner end (end that is closer to the rotating rod 26) of the side 29a is located at a position spaced apart from the rotating rod 26. Similarly, an outer end (end that is closer to the drum 22) of the side 29a is located at a position spaced apart from the drum 22. The distance from the outer end of the side 29a to the inner circumferential surface of the drum 22 is larger than the height of the ridge 24 and may be between 1 cm and 3 cm inclusive, for example. The side 29b connects the outer end of the side 29a to the inner end of the side 29a of the next tooth 29. The side 29b is longer than the side 29a. The ratio of the length of the side 29b to the length of the side 29a may be between 2 and 2.5 inclusive, for example.

    [0021] The rotating rod 26 and the screw member 28 rotate in a left-handed direction (counterclockwise) in FIG. 3. That is to say, in each tooth 29, the side 29b is located on a forward side with respect to the rotation direction, and the side 29a is located on a rearward side with respect to the rotation direction. The rotation direction of the drum 22 described above may be the same as the rotation direction of the rotating rod 26 and the screw member 28 or may be opposite to this rotation direction. In the case where these rotation directions are the same, it is preferable that the rotation speed of the rotating rod 26 and the screw member 28 is greater than the rotation speed of the drum 22.

    [0022] The shredding unit 30 shreds the disposable diaper fragments from which the water-absorbent polymer passing through the holes 22a has been separated by the separation unit 20. For example, a crusher or a grinder can be used as the shredding unit 30. A screen is provided in the shredding unit 30. The hole diameter of the screen may be between 30 mm and 70 mm inclusive, for example.

    [0023] The structure of the separation unit 40 will be described with reference to FIGS. 4 and 5. FIG. 4 is a side view showing the separation unit 40. FIG. 5 is a cross-sectional view taken along line V-V in FIG. 4. The separation unit 40 has a drum 42 (first tubular portion). The drum 42 has a substantially cylindrical tubular shape and is provided so as to be rotatable about its central axis. The central axis of the drum 42 extends horizontally. The inner diameter of the drum 42 may be between 30 cm and 50 cm inclusive, for example.

    [0024] A large number of holes 42a (first holes) are formed in the drum 42. The holes 42a are formed over substantially the entire drum 42. The holes 42a do not allow the plastic contained in the disposable diaper fragments shredded by the shredding unit 30 to pass through, but allow the water-absorbent polymer to pass through. The area of each of the holes 42a in a plan view is smaller than the area of each of the holes 22a in a plan view. The diameter of the holes 42a may be between 5 mm and 20 mm inclusive, for example. The separation unit 40 rotates the drum 42 in a state in which the disposable diaper fragments shredded by the shredding unit 30 are accommodated therein, thereby separating the water-absorbent polymer passing through the holes 42a from the disposable diaper fragments.

    [0025] A ridge 44 (first ridge) is formed on an inner circumferential surface of the drum 42. The ridge 44 extends in a direction in which the central axis of the drum 42 extends. The ridge 44 extends over substantially the entire path from an inlet side (left side of FIG. 4) to an outlet side (right side of FIG. 4) of the drum 42. Also, the ridge 44 has a substantially triangular cross-sectional shape. The height (length in the radial direction of the drum 42) of the ridge 44 may be between 5 mm and 2 cm inclusive, for example. Preferably, "p" (p: an integer between 3 and 5 inclusive) ridges 44 are provided. The "p" ridges 44 are arranged on the inner circumferential surface of the drum 42 at regular intervals. That is so say, in a cross section (cross section shown in FIG. 5) that is perpendicular to the central axis of the drum 42, an angle β that is formed by a line connecting one ridge 44 to the central axis and a line connecting the next ridge 44 to the central axis is substantially equal to 360°/p. In the present embodiment, p = 4 and β = 90°.

    [0026] A rotating rod 46 and a screw member 48 are provided inside the drum 42. The rotating rod 46 has a substantially cylindrical shape and is provided so as to be rotatable about its central axis. The central axis of the rotating rod 46 coincides with the central axis of the drum 42. However, the rotating rod 46 rotates independently of the drum 42. The outer diameter of the rotating rod 46 may be between 15 cm and 25 cm inclusive, for example.

    [0027] The screw member 48 is helically provided around the rotating rod 46. The screw member 48 is fixed to the rotating rod 46 and rotates together with the rotating rod 46. A plurality of teeth 49 are formed in the screw member 48. An end portion of each tooth 49 is constituted by a side 49a and a side 49b in a front view (see FIG. 5).

    [0028] The side 49a extends in the radial direction of the drum 42 and the rotating rod 46. An inner end (end that is closer to the rotating rod 46) of the side 49a is located at a position spaced apart from the rotating rod 46. Similarly, an outer end (end that is closer to the drum 42) of the side 49a is located at a position spaced apart from the drum 42. The distance from the outer end of the side 49a to the inner circumferential surface of the drum 42 is larger than the height of the ridge 44 and may be between 1 cm and 3 cm inclusive, for example. The side 49b connects the outer end of the side 49a to the inner end of the side 49a of the next tooth 49. The side 49b is longer than the side 49a. The ratio of the length of the side 49b to the length of the side 49a may be between 2 and 2.5 inclusive, for example.

    [0029] The rotating rod 46 and the screw member 48 rotate in a left-handed direction (counterclockwise) in FIG. 5. That is to say, in each tooth 49, the side 49b is located on the forward side with respect to the rotation direction, and the side 49a is located on the rearward side with respect to the rotation direction. The rotation direction of the drum 42 described above may be the same as the rotation direction of the rotating rod 46 and the screw member 48 or may be opposite to this rotation direction. In the case where these rotation directions are the same, it is preferable that the rotation speed of the rotating rod 46 and the screw member 48 is greater than the rotation speed of the drum 42.

    [0030] The shredding unit 50 shreds the disposable diaper fragments from which the water-absorbent polymer passing through the holes 42a has been separated by the separation unit 40. For example, a crusher or a grinder can be used as the shredding unit 50. A screen is provided in the shredding unit 50. The hole diameter of the screen may be between 30 mm and 70 mm inclusive, for example.

    [0031] The structure of the separation unit 60 will be described with reference to FIGS. 6 and 7. FIG. 6 is a side view showing the separation unit 60. FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6. The separation unit 60 has a drum 62 (third tubular portion). The drum 62 has a substantially cylindrical tubular shape and is provided so as to be rotatable about its central axis. The central axis of the drum 62 extends horizontally. The inner diameter of the drum 62 may be between 30 cm and 50 cm inclusive, for example.

    [0032] A large number of holes 62a (third holes) are formed in the drum 62. The holes 62a are formed over substantially the entire drum 62. The holes 62a do not allow the plastic contained in the disposable diaper fragments shredded by the shredding unit 50 to pass through, but allow the water-absorbent polymer to pass through. The area of each of the holes 62a in a plan view is smaller than the area of each of the holes 42a in a plan view. The diameter of the holes 62a may be between 3 mm and 7 mm inclusive, for example. The separation unit 60 rotates the drum 62 in a state in which the disposable diaper fragments shredded by the shredding unit 50 are accommodated therein, thereby separating the water-absorbent polymer passing through the holes 62a from the disposable diaper fragments.

    [0033] A ridge 64 (third ridge) is formed on an inner circumferential surface of the drum 62. The ridge 64 extends in a direction in which the central axis of the drum 62 extends. The ridge 64 extends over substantially the entire path from an inlet side (left side of FIG. 6) to an outlet side (right side of FIG. 6) of the drum 62. Also, the ridge 64 has a substantially triangular cross-sectional shape. The height (length in the radial direction of the drum 62) of the ridge 64 may be between 5 mm and 2 cm inclusive, for example. Preferably, "r" (r: an integer between 3 and 5 inclusive) ridges 64 are provided. The "r" ridges 64 are arranged on the inner circumferential surface of the drum 62 at regular intervals. That is to say, in a cross section (cross section shown in FIG. 7) that is perpendicular to the central axis of the drum 62, an angle γ that is formed by a line connecting one ridge 64 to the central axis and a line connecting the next ridge 64 to the central axis is substantially equal to 360°/r. In the present embodiment, r = 4 and γ = 90°.

    [0034] A rotating rod 66 and a screw member 68 are provided inside the drum 62. The rotating rod 66 has a substantially cylindrical shape and is provided so as to be rotatable about its central axis. The central axis of the rotating rod 66 coincides with the central axis of the drum 62. However, the rotating rod 66 rotates independently of the drum 62. The outer diameter of the rotating rod 66 may be between 15 cm and 25 cm inclusive, for example.

    [0035] The screw member 68 is helically provided around the rotating rod 66. The screw member 68 is fixed to the rotating rod 66 and rotates together with the rotating rod 66. A plurality of teeth 69 are formed in the screw member 68. An end portion of each tooth 69 is constituted by a side 69a and a side 69b in a front view (see FIG. 7).

    [0036] The side 69a extends in the radial direction of the drum 62 and the rotating rod 66. An inner end (end that is closer to the rotating rod 66) of the side 69a is located at a position spaced apart from the rotating rod 66. Similarly, an outer end (end that is closer to the drum 62) of the side 69a is located at a position spaced apart from the drum 62. The distance from the outer end of the side 69a to the inner circumferential surface of the drum 62 is larger than the height of the ridge 64 and may be between 1 cm and 3 cm inclusive, for example. The side 69b connects the outer end of the side 69a to the inner end of the side 69a of the next tooth 69. The side 69b is longer than the side 69a. The ratio of the length of the side 69b to the length of the side 69a may be between 2 and 2.5 inclusive, for example.

    [0037] The rotating rod 66 and the screw member 68 rotate in a left-handed direction (counterclockwise) in FIG. 7. That is to say, in each tooth 69, the side 69b is located on the forward side with respect to the rotation direction, and the side 69a is located on the rearward side with respect to the rotation direction. The rotation direction of the drum 62 described above may be the same as the rotation direction of the rotating rod 66 and the screw member 68 or may be opposite to this rotation direction. In the case where these rotation directions are the same, it is preferable that the rotation speed of the rotating rod 66 and the screw member 68 is greater than the rotation speed of the drum 62.

    [0038] The separation device 1 is further provided with a transfer path 72, a transfer path 74, a transfer path 76, a transfer path 78, and a transfer path 80. The transfer path 72 transfers the disposable diaper fragments after shredding by the shredding unit 10 to the separation unit 20. The transfer path 72 may be a screw conveyor, for example. The transfer path 74 transfers the disposable diaper fragments after separation by the separation unit 20 to the shredding unit 30. The transfer path 74 may be a duct, for example.

    [0039] The transfer path 76 is a duct (first air pipe) and transfers the disposable diaper fragments after shredding by the shredding unit 30 to the separation unit 40 with air pressure. The transfer path 78 is a duct (second air pipe) and transfers the disposable diaper fragments after separation by the separation unit 40 to the shredding unit 50 with air pressure. The transfer path 80 is a duct (third air pipe) and transfers the disposable diaper fragments after shredding by the shredding unit 50 to the separation unit 60.

    [0040] The structure of the transfer path 76 will be described with reference to FIG. 8. FIG. 8 is a cross-sectional view showing the transfer path 76. The transfer path 76 has a portion 76a (first portion) extending in a first direction, a portion 76b (second portion) extending in a second direction, and a portion 76c (third portion) extending in a third direction. In the present embodiment, the first direction is a horizontal direction, the second direction is a vertical direction, and the third direction is a horizontal direction. The portion 76b is connected to the portion 76a on a downstream side of the portion 76a. The portion 76c is connected to the portion 76b on the downstream side of the portion 76b. Thus, the portion 76a, the portion 76b, and the portion 76c constitute a single cranked duct. The inner diameter of the transfer path 76 may be between 10 cm and 20 cm inclusive, for example.

    [0041] An uneven surface 77a (first uneven surface) is present in a connecting portion between the portion 76a and the portion 76b. The uneven surface 77a is provided at a position where the disposable diaper fragments that are transferred through the portion 76a collide with this uneven surface. The uneven surface 77a is at an angle of about 45° to a vertical plane. For example, a corrugated or embossed plate-like member can be used as the uneven surface 77a. The material for the uneven surface 77a may be aluminum, for example.

    [0042] An uneven surface 77b (second uneven surface) is present in a connecting portion between the portion 76b and the portion 76c. The uneven surface 77b is provided at a position where the disposable diaper fragments that are transferred through the portion 76b collide with this uneven surface. The uneven surface 77b is at an angle of about 45°to a horizontal plane. For example, a corrugated or embossed plate-like member can be used as the uneven surface 77b. The material for the uneven surface 77b may be aluminum, for example.

    [0043] The structure of the transfer path 78 will be described with reference to FIG. 9. FIG. 9 is a cross-sectional view showing the transfer path 78. The transfer path 78 has a portion 78a (first portion) extending in a first direction, a portion 78b (second portion) extending in a second direction, and a portion 78c (third portion) extending in a third direction. In the present embodiment, the first direction is a horizontal direction, the second direction is a vertical direction, and the third direction is a horizontal direction. The portion 78b is connected to the portion 78a on the downstream side of the portion 78a. The portion 78c is connected to the portion 78b on the downstream side of the portion 78b. Thus, the portion 78a, the portion 78b, and the portion 78c constitute a single cranked duct. The inner diameter of the transfer path 78 may be between 10 cm and 20 cm inclusive, for example.

    [0044] An uneven surface 79a (third uneven surface) is present in a connecting portion between the portion 78a and the portion 78b. The uneven surface 79a is provided at a position where the disposable diaper fragments that are transferred through the portion 78a collide with this uneven surface. The uneven surface 79a is at an angle of about 45° to a vertical plane. For example, a corrugated or embossed plate-like member can be used as the uneven surface 79a. The material for the uneven surface 79a may be aluminum, for example.

    [0045] An uneven surface 79b (fourth uneven surface) is present in a connecting portion between the portion 78b and the portion 78c. The uneven surface 79b is provided at a position where the disposable diaper fragments that are transferred through the portion 78b collide with this uneven surface. The uneven surface 79b is at an angle of about 45° to a horizontal plane. For example, a corrugated or embossed plate-like member can be used as the uneven surface 79b. The material for the uneven surface 79b may be aluminum, for example.

    [0046] The structure of the transfer path 80 will be described with reference to FIG. 10. FIG. 10 is a cross-sectional view showing the transfer path 80. The transfer path 80 has a portion 80a (first portion) extending in a first direction, a portion 80b (second portion) extending in a second direction, and a portion 80c (third portion) extending in a third direction. In the present embodiment, the first direction is a horizontal direction, the second direction is a vertical direction, and the third direction is a horizontal direction. The portion 80b is connected to the portion 80a on the downstream side of the portion 80a. The portion 80c is connected to the portion 80b on the downstream side of the portion 80b. Thus, the portion 80a, the portion 80b, and the portion 80c constitute a single cranked duct. The inner diameter of the transfer path 80 may be between 10 cm and 20 cm inclusive, for example.

    [0047] An uneven surface 81a (fifth uneven surface) is present in a connecting portion between the portion 80a and the portion 80b. The uneven surface 81a is provided at a position where the disposable diaper fragments that are transferred through the portion 80a collide with this uneven surface. The uneven surface 81a is at an angle of about 45° to a vertical plane. For example, a corrugated or embossed plate-like member can be used as the uneven surface 81a. The material for the uneven surface 81a may be aluminum, for example.

    [0048] An uneven surface 81b (sixth uneven surface) is present in a connecting portion between the portion 80b and the portion 80c. The uneven surface 81b is provided at a position where the disposable diaper fragments that are transferred through the portion 80b collide with this uneven surface. The uneven surface 81b is at an angle of about 45° to a horizontal plane. For example, a corrugated or embossed plate-like member can be used as the uneven surface 81b. The material for the uneven surface 81b may be aluminum, for example.

    [0049] The operation of the separation device 1 will be described. A disposable diaper, which is a processing target, is first shredded by the shredding unit 10 into fragments. The disposable diaper fragments shredded by the shredding unit 10 are transferred to the separation unit 20 through the transfer path 72. The disposable diaper fragments transferred to the separation unit 20 are propelled from the inlet side (left side of FIG. 2) to the outlet side (right side of FIG. 2) of the drum 22 by the rotating screw member 28. Meanwhile, due to the centrifugal force and the like generated by the rotation of the drum 22, the water-absorbent polymer dissociated from the plastic is discharged to the outside of the drum 22 through the holes 22a. Thus, a portion of the water-absorbent polymer is separated from the disposable diaper fragments. It should be noted that in the case where the processing target is a disposable diaper as in the present embodiment, paper (fluff pulp etc.) is also separated together with the water-absorbent polymer.

    [0050] The disposable diaper fragments after separation by the separation unit 20 are transferred to the shredding unit 30 through the transfer path 74 and are further shredded. The disposable diaper fragments shredded by the shredding unit 30 are transferred to the separation unit 40 through the transfer path 76. The disposable diaper fragments transferred to the separation unit 40 are propelled from the inlet side (left side of FIG. 4) to the outlet side (right side of FIG. 4) of the drum 42 by the rotating screw member 48. Meanwhile, due to the centrifugal force and the like generated by the rotation of the drum 42, the water-absorbent polymer dissociated from the plastic is discharged to the outside of the drum 42 through the holes 42a. Thus, the remaining water-absorbent polymer is separated from the disposable diaper fragments.

    [0051] The disposable diaper fragments after separation by the separation unit 40 are transferred to the shredding unit 50 through the transfer path 78 and are further shredded. The disposable diaper fragments shredded by the shredding unit 50 are transferred to the separation unit 60 through the transfer path 80. The disposable diaper fragments transferred to the separation unit 60 are propelled from the inlet side (left side of FIG. 6) to the outlet side (right side of FIG. 6) of the drum 62 by the rotating screw member 68. Meanwhile, due to the centrifugal force and the like generated by the rotation of the drum 62, the water-absorbent polymer dissociated from the plastic is discharged to the outside of the drum 62 through the holes 62a. Thus, the remaining water-absorbent polymer is separated from the disposable diaper fragments.

    [0052] The effects of the present embodiment will be described. In the present embodiment, the drum 42 is provided with the ridges 44. If the ridges 44 are not provided, the disposable diaper fragments tend to collect in a lower portion of the drum 42 due to the effect of gravity. In contrast, in the present embodiment, the disposable diaper fragments in the drum 42 are scooped up by the ridges 44 and thus easily reach an upper portion of the drum 42. Therefore, the disposable diaper fragments are distributed over a wide range of the inner circumferential surface of the drum 42, so that separation by the separation unit 40 is promoted. This contributes to an improvement in the separation efficiency of the separation device 1. Therefore, according to the present embodiment, the separation device 1 having the high separation efficiency is realized.

    [0053] The plastic that is recovered according to the present embodiment may be formed into pellets by granulation. The plastic pellets can be reused in various plastic products. In the case where the plastic is reused, if the plastic contains a large amount of water-absorbent polymer, the water-absorbent polymer may, for example, swell when the plastic product is wetted, and cause a deterioration in quality of the product. In this regard, reusing the plastic that is recovered according to the present embodiment enables a high-quality plastic product to be produced. Preferably, the weight ratio of the water-absorbent polymer adhering to the plastic immediately after the processing of the present embodiment with respect to that plastic is 5% or less. This weight ratio is more preferably 3% or less, and even more preferably 1% or less.

    [0054] Moreover, dissociation of the water-absorbent polymer from the plastic is promoted by the impact of the disposable diaper fragments scooped up by the ridges 44 when falling down from the upper portion of the drum 42. Furthermore, the ridges 44 become obstacles when the disposable diaper fragments are propelled by the screw member 48, and thus the time for which the disposable diaper fragments stay in the drum 42 is prolonged. Thus, a larger amount of water-absorbent polymer can be separated from the disposable diaper fragments.

    [0055] The drum 22 is provided with the ridges 24. If the ridges 24 are not provided, the disposable diaper fragments tend to collect in a lower portion of the drum 22 due to the effect of gravity. In contrast, in the present embodiment, the disposable diaper fragments in the drum 22 are scooped up by the ridges 24 and thus easily reach an upper portion of the drum 22. Therefore, the disposable diaper fragments are distributed over a wide range of the inner circumferential surface of the drum 22, so that separation by the separation unit 20 is promoted. Moreover, dissociation of the water-absorbent polymer from the plastic is promoted by the impact of the disposable diaper fragments when falling down from the upper portion of the drum 22. Furthermore, the ridges 24 become obstacles when the disposable diaper fragments are propelled by the screw member 28, and thus the time for which the disposable diaper fragments stay in the drum 22 is prolonged. Thus, a larger amount of water-absorbent polymer can be separated from the disposable diaper fragments.

    [0056] The drum 62 is provided with the ridges 64. If the ridges 64 are not provided, the disposable diaper fragments tend to collect in a lower portion of the drum 62 due to the effect of gravity. In contrast, in the present embodiment, the disposable diaper fragments in the drum 62 are scooped up by the ridges 64 and thus easily reach an upper portion of the drum 62. Thus, the disposable diaper fragments are distributed over a wide range of the inner circumferential surface of the drum 62, so the separation by the separation unit 60 is promoted. Moreover, due to the impact of the disposable diaper fragments when falling down from the upper portion of the drum 62, dissociation of the water-absorbent polymer from the plastic is promoted. Furthermore, the ridges 64 become obstacles when the disposable diaper fragments are propelled by the screw member 68, and thus the time for which the disposable diaper fragments stay in the drum 62 is prolonged. Accordingly, a larger amount of water-absorbent polymer can be separated from the disposable diaper fragments.

    [0057] The screw member 28 is provided inside the drum 22. The disposable diaper fragments in the drum 22 are beaten and rubbed against the inner circumferential surface of the drum 22 by the screw member 28. The impact and the frictional force at that time promote dissociation of the water-absorbent polymer from the plastic. Moreover, since the ridges 24 are provided, the disposable diaper fragments may be beaten and rubbed against the inner circumferential surface of the drum 22 by the screw member 28 in a state in which the disposable diaper fragments are caught on the ridges 24. In that case, forces are focused, so that the impact and the frictional force that are applied to the disposable diaper fragments increase, and accordingly dissociation of the water-absorbent polymer from the plastic is promoted even more.

    [0058] The screw member 28 rotates with the side 29b that forms an obtuse angle with the rotation direction (direction of the tangent to the rotating rod 26), rather than the side 29a that forms an approximately right angle with the rotation direction, being located on the forward side (see FIG. 3). Thus, the disposable diaper fragments can be prevented from being excessively caught on the teeth 29 of the screw member 28.

    [0059] The screw member 48 is provided inside the drum 42. The disposable diaper fragments in the drum 42 are beaten and rubbed against the inner circumferential surface of the drum 42 by the screw member 48. The impact and the frictional force at that time promote dissociation of the water-absorbent polymer from the plastic. Moreover, since the ridges 44 are provided, the disposable diaper fragments may be beaten and rubbed against the inner circumferential surface of the drum 42 by the screw member 48 in a state in which the disposable diaper fragments are caught on the ridges 44. In that case, forces are focused, so that the impact and the frictional force that are applied to the disposable diaper fragments increase, and accordingly dissociation of the water-absorbent polymer from the plastic is promoted even more.

    [0060] The screw member 48 rotates with the side 49b that forms an obtuse angle with the rotation direction (direction of the tangent to the rotating rod 46), rather than the side 49a that forms an approximately right angle with the rotation direction, being located on the forward side (see FIG. 5). Thus, the disposable diaper fragments can be prevented from being excessively caught on the teeth 49 of the screw member 48.

    [0061] The screw member 68 is provided inside the drum 62. The disposable diaper fragments in the drum 62 are beaten and rubbed against the inner circumferential surface of the drum 62 by the screw member 68. The impact and the frictional force at that time promote dissociation of the water-absorbent polymer from the plastic. Moreover, since the ridges 64 are provided, the disposable diaper fragments may be beaten and rubbed against the inner circumferential surface of the drum 62 by the screw member 68 in a state in which the disposable diaper fragments are caught on the ridges 64. In that case, forces are focused, so that the impact and the frictional force that are applied to the disposable diaper fragments increase, and accordingly dissociation of the water-absorbent polymer from the plastic is promoted even more.

    [0062] The screw member 68 rotates with the side 69b that forms an obtuse angle with the rotation direction (direction of the tangent to the rotating rod 66), rather than the side 69a that forms an approximately right angle with the rotation direction, being located on the forward side (see FIG. 7). Thus, the disposable diaper fragments can be prevented from being excessively caught on the teeth 69 of the screw member 68.

    [0063] In the present embodiment, after shredding by the shredding unit 10 and separation by the separation unit 20, shredding by the shredding unit 30 and separation by the separation unit 40 are performed. Therefore, the separation efficiency is improved when compared with the case where shredding and separation are performed only one time.

    [0064] Incidentally, Patent Document 1 discloses a separation device in which two separators are provided. However, the separation device in this document is significantly different from the separation device 1 in that the processing target processed by the first separator is transferred to the second separator without being shredded.

    [0065] In the separation device 1, the disposable diaper fragments after separation by the separation unit 20 are shredded by the shredding unit 30 before being transferred to the separation unit 40. Therefore, separation by the separation unit 40 is promoted when compared with the case where shredding by the shredding unit 30 is not performed. This leads to an improvement in the separation efficiency of the separation device 1.

    [0066] Furthermore, in the present embodiment, after shredding by the shredding unit 30 and separation by the separation unit 40 are performed, shredding by the shredding unit 50 and separation by the separation unit 60 are performed. The separation efficiency is improved even more by performing shredding and separation three times in this manner.

    [0067] The transfer path 76 has the portion 76a and the portion 76b that are orthogonal to each other (see FIG. 8). Thus, the disposable diaper fragments transferred by air pressure collide with the inner surface of the transfer path 76 in the connecting portion between the portion 76a and the portion 76b. The impact of this collision promotes dissociation of the water-absorbent polymer from the plastic. Furthermore, the transfer path 76 has the portion 76c that is orthogonal to the portion 76b. Thus, the disposable diaper fragments transferred by air pressure also collide with the inner surface of the transfer path 76 in the connecting portion between the portion 76b and the portion 76c. The impact of this collision promotes dissociation of the water-absorbent polymer from the plastic.

    [0068] Furthermore, the uneven surface 77a is present in the connecting portion between the portion 76a and the portion 76b. When colliding with the uneven surface 77a, the disposable diaper fragments are subjected to a stronger impact than in the case where they collide with a flat surface. Therefore, dissociation of the water-absorbent polymer from the plastic is promoted even more.

    [0069] The transfer path 76 has the portion 76c that is orthogonal to the portion 76b. Thus, the disposable diaper fragments transferred by air pressure also collide with the inner surface of the transfer path 76 in the connecting portion between the portion 76b and the portion 76c. The impact of this collision promotes dissociation of the water-absorbent polymer from the plastic.

    [0070] Furthermore, the uneven surface 77b is present in the connecting portion between the portion 76b and the portion 76c. When colliding with the uneven surface 77b, the disposable diaper fragments are subjected to a stronger impact than in the case where they collide with a flat surface. Therefore, dissociation of the water-absorbent polymer from the plastic is promoted even more.

    [0071] The transfer path 78 has the portion 78a and the portion 78b that are orthogonal to each other (see FIG. 9). Thus, the disposable diaper fragments transferred by air pressure collide with the inner surface of the transfer path 78 in the connecting portion between the portion 78a and the portion 78b. The impact of this collision promotes dissociation of the water-absorbent polymer from the plastic.

    [0072] Furthermore, the uneven surface 79a is present in the connecting portion between the portion 78a and the portion 78b. When colliding with the uneven surface 79a, the disposable diaper fragments are subjected to a stronger impact than in the case where they collide with a flat surface. Therefore, dissociation of the water-absorbent polymer from the plastic is promoted even more.

    [0073] The transfer path 78 has the portion 78c that is orthogonal to the portion 78b. Thus, the disposable diaper fragments transferred by air pressure also collide with the inner surface of the transfer path 78 in the connecting portion between the portion 78b and the portion 78c. The impact of this collision promotes dissociation of the water-absorbent polymer from the plastic.

    [0074] Furthermore, the uneven surface 79b is present in the connecting portion between the portion 78b and the portion 78c. When colliding with the uneven surface 79b, the disposable diaper fragments are subjected to a stronger impact than in the case where they collide with a flat surface. Therefore, dissociation of the water-absorbent polymer from the plastic is promoted even more.

    [0075] The transfer path 80 has the portion 80a and the portion 80b that are orthogonal to each other (see FIG. 10). Thus, the disposable diaper fragments transferred by air pressure collide with the inner surface of the transfer path 80 in the connecting portion between the portion 80a and the portion 80b. The impact of this collision promotes dissociation of the water-absorbent polymer from the plastic.

    [0076] Furthermore, the uneven surface 81a is present in the connecting portion between the portion 80a and the portion 80b. When colliding with the uneven surface 81a, the disposable diaper fragments are subjected to a stronger impact than in the case where they collide with a flat surface. Therefore, dissociation of the water-absorbent polymer from the plastic is promoted even more.

    [0077] The transfer path 80 has the portion 80c that is orthogonal to the portion 80b. Thus, the disposable diaper fragments transferred by air pressure also collide with the inner surface of the transfer path 80 in the connecting portion between the portion 80b and the portion 80c. The impact of this collision promotes dissociation of the water-absorbent polymer from the plastic.

    [0078] Furthermore, the uneven surface 81b is present in the connecting portion between the portion 80b and the portion 80c. When colliding with the uneven surface 81b, the disposable diaper fragments are subjected to a stronger impact than in the case where they collide with a flat surface. Therefore, dissociation of the water-absorbent polymer from the plastic is promoted even more.

    [0079] The separation device according to the present invention is not limited to the foregoing embodiment, and various modifications can be made thereto. For example, in the foregoing embodiments, an example in which shredding and separation are performed three times has been described. However, it is possible that shredding and separation are performed two times. In this case, the shredding unit 50, the separation unit 60, the transfer path 78, and the transfer path 80 in FIG. 1 are not necessary. Also, it is possible that shredding and separation are performed one time. In this case, the shredding unit 10, the separation unit 20, the transfer path 72, the transfer path 74, the shredding unit 50, the separation unit 60, the transfer path 78, and the transfer path 80 in FIG. 1 are not necessary.

    [0080] In the foregoing embodiments, an example in which the drum 22 has a cylindrical tubular shape has been described. However, it is also possible that the drum 22 has a tapered shape. The same applies to the drum 42 and the drum 62.

    [0081] In the foregoing embodiments, an example in which the central axis of the drum 22 extends horizontally has been described. However, it is also possible that the central axis of the drum 22 is sloped downward from the inlet side toward the outlet side. The same applies to the drum 42 and the drum 62.

    [0082] In the foregoing embodiments, an example in which the holes 22a are formed over substantially the entire drum 22 has been described. However, it is also possible that the holes 22a are formed in only a portion of the drum 22. Moreover, it is also possible that the holes 22a are formed by forming substantially the whole or a portion of the drum 22 in a mesh form. That is to say, in this case, the meshes of the drum 22 correspond to the holes 22a. The same applies to the holes 42a and the holes 62a.

    [0083] In the foregoing embodiments, an example in which the ridges 24 extend over the entire path from the inlet side to the outlet side of the drum 22 has been described. However, it is also possible that the ridges 24 extend in only a portion of the path from the inlet side to the outlet side of the drum 22. The same applies to the ridges 44 and the ridges 64.

    [0084] In the foregoing embodiments, the ridges 24 having a substantially triangular cross-sectional shape have been described as an example. However, it is also possible that the ridges 24 have a flat plate-like shape as shown in FIG. 11. The same applies to the ridges 44 and the ridges 64.

    [0085] In the foregoing embodiments, an example in which four ridges 24 are provided on the inner circumferential surface of the drum 22 has been described. However, the number of ridges 24 can be set at any number greater than or equal to 1. The same applies to the ridges 44 and the ridges 64.

    [0086] In the foregoing embodiments, an example in which the rotating rod 26 and the screw member 28 are provided inside the drum 22 has been described. However, the provision of the rotating rod 26 and the screw member 28 is not necessarily required. The same applies to the rotating rod 46 and the screw member 48 and to the rotating rod 66 and the screw member 68.

    [0087] In the foregoing embodiments, an example in which the uneven surface 77a is at a certain angle to a vertical plane has been described. However, it is also possible that the uneven surface 77a extends along a vertical plane as shown in FIG. 12. Moreover, it is also possible that the uneven surface 77a is realized by providing a protrusion P1 on the inner surface (position with which the disposable diaper fragments transferred through the portion 76a collide) of the transfer path 76 as shown in FIG. 13. The number of protrusions P1 may be one or may be two or more. The same applies to the uneven surface 79a and the uneven surface 81a.

    [0088] In the foregoing embodiments, an example in which the uneven surface 77b is at a certain angle to a horizontal plane has been described. However, it is also possible that the uneven surface 77b extends along a horizontal plane as shown in FIG. 12. Moreover, it is also possible that the uneven surface 77b is realized by providing a protrusion P2 on the inner surface (position with which the disposable diaper fragments transferred through the portion 76b collide) of the transfer path 76 as shown in FIG. 13. The number of protrusions P2 may be one or may be two or more. The same applies to the uneven surface 79b and the uneven surface 81b.

    [0089] In the foregoing embodiments, an example in which the uneven surface 77a is provided has been described. However, the provision of the uneven surface 77a is not necessarily required. The same applies to the uneven surface 79a and the uneven surface 81a.

    [0090] In the foregoing embodiments, an example in which the uneven surface 77b is provided has been described. However, the provision of the uneven surface 77b is not necessarily required. The same applies to the uneven surface 79b and the uneven surface 81b.

    List of Reference Numerals



    [0091] 
    1
    Separation device
    10
    Shredding unit (second shredding unit)
    20
    Separation unit (second separation unit)
    22
    Drum (second tubular portion)
    22a
    Hole (second hole)
    24
    Ridge (second ridge)
    26
    Rotating rod
    28
    Screw member
    29
    Tooth
    30
    Shredding unit (first shredding unit)
    40
    Separation unit (first separation unit)
    42
    Drum (first tubular portion)
    42a
    Hole (first hole)
    44
    Ridge (first ridge)
    46
    Rotating rod
    48
    Screw member
    49
    Tooth
    50
    Shredding unit (third shredding unit)
    60
    Separation unit (third separation unit)
    62
    Drum (third tubular portion)
    62a
    Hole (third hole)
    64
    Ridge (third ridge)
    66
    Rotating rod
    68
    Screw member
    69
    Tooth
    72
    Transfer path
    74
    Transfer path
    76
    Transfer path (first air pipe)
    77a
    Uneven surface (first uneven surface)
    77b
    Uneven surface (second uneven surface)
    78
    Transfer path (second air pipe)
    79a
    Uneven surface (third uneven surface)
    79b
    Uneven surface (fourth uneven surface)
    80
    Transfer path (third air pipe)
    81a
    Uneven surface (fifth uneven surface)
    81b
    Uneven surface (sixth uneven surface)



    Claims

    1. A separation device (1) comprising:

    a first shredding unit (30) that shreds a processing target containing a first material and a second material adhering to the first material;

    a first separation unit (40) that has a first tubular portion (42) in which first holes (42a) that allow the second material contained in the processing target shredded by the first shredding unit (30) to pass through without allowing the first material to pass through are formed, and that separates the second material passing through the first holes (42a) from the processing target by rotating the first tubular portion (42) in a state in which the processing target shredded by the first shredding unit (30) is accommodated in the first tubular portion (42), the first separation unit (40) including inside the first tubular portion (42) a first rotating rod (46) that has a central axis coinciding with the central axis of the first tubular portion (42) and is provided so as to be rotatable about the central axis of the first rotating rod (46), the separation device being characterized in that a first ridge (44) is provided on an inner circumferential surface of the first tubular portion (42) the ridge extending in a direction in which a central axis of the first tubular portion (42) extends and a first screw member (48) is helically provided around the first rotating rod (46) and has a plurality of teeth (49) formed in the first screw member (48).


     
    2. The separation device according to claim 1,
    wherein "p" of said first ridges (44) are present, "p" being an integer between 3 and 5 inclusive, and the "p" first ridges (44) are arranged on the inner circumferential surface of the first tubular portion (42) at regular intervals.
     
    3. The separation device according to claim 1 or 2, comprising a first air pipe (76) for transferring the processing target shredded by the first shredding unit (30) to the first separation unit (40) with air pressure,
    wherein the first air pipe (76) has a first portion (76a) that extends in a first direction and a second portion (76b) that is connected to the first portion (76a) on a downstream side of the first portion (76a) and that extends in a second direction substantially orthogonal to the first direction.
     
    4. The separation device according to claim 3, comprising a first uneven surface (77a) that is present in a connecting portion between the first portion (76a) and the second portion (76b) of the first air pipe (76) and with which the processing target transferred through the first portion (76a) collides.
     
    5. The separation device according to claim 3 or 4,
    wherein the first air pipe (76) has a third portion (76c) that is connected to the second portion (76b) on a downstream side of the second portion (76b) and that extends in a third direction substantially orthogonal to the second direction.
     
    6. The separation device according to claim 5, comprising a second uneven surface (77b) that is present in a connecting portion between the second portion (76b) and the third portion (76c) of the first air pipe (76) and with which the processing target transferred through the second portion (76b) collides.
     
    7. The separation device according to any of claims 1 to 6, comprising:

    a second shredding unit (10) that shreds the processing target; and

    a second separation unit (20) that has a second tubular portion (22) in which second holes (22a) that allow the second material contained in the processing target shredded by the second shredding unit (10) to pass through without allowing the first material to pass through are formed, and that separates the second material passing through the second holes (22a) from the processing target by rotating the second tubular portion (22) in a state in which the processing target shredded by the second shredding unit (10) is accommodated in the second tubular portion (22),

    wherein the first shredding unit (30) shreds the processing target from which the second material passing through the second holes (22a) is separated by the second separation unit (20).


     
    8. The separation device according to claim 7,
    wherein the second separation unit (20) includes inside the second tubular portion (22):

    a second rotating rod (26) that has a central axis coinciding with a central axis of the second tubular portion (22) and is provided so as to be rotatable about the central axis of the second rotating rod (26); and

    a second screw member (28) that is helically provided around the second rotating rod (26) and has a plurality of teeth (29) formed in the second screw member (28).


     
    9. The separation device according to claim 7 or 8,
    wherein an area of each of the first holes (42a) in a plan view is smaller than an area of each of the second holes (22a) in a plan view.
     
    10. The separation device according to any of claims 1 to 9, comprising:

    a third shredding unit (50) that shreds the processing target from which the second material passing through the first holes (42a) is separated by the first separation unit (40); and

    a third separation unit (60) that has a third tubular portion (62) in which third holes (62a) that allow the second material contained in the processing target shredded by the third shredding unit (50) to pass through without allowing the first material to pass through are formed, and that separates the second material passing through the third holes (62a) from the processing target by rotating the third tubular portion (62) in a state in which the processing target shredded by the third shredding unit (50) is accommodated in the third tubular portion (62).


     
    11. The separation device according to claim 10,
    wherein the third separation unit (60) includes inside the third tubular portion (62):

    a third rotating rod (66) that has a central axis coinciding with a central axis of the third tubular portion (62) and is provided so as to be rotatable about the central axis of the third rotating rod (66); and

    a third screw member (68) that is helically provided around the third rotating rod (66) and has a plurality of teeth (69) formed in the third screw member (68).


     
    12. The separation device according to claim 10 or 11,
    wherein an area of each of the third holes (62a) in a plan view is smaller than an area of each of the first holes (42a) in a plan view.
     


    Ansprüche

    1. Trennvorrichtung (1), umfassend:

    eine erste Zerkleinerungseinheit (30), die ein Verarbeitungsziel zerkleinert, das ein erstes Material und ein zweites Material, das an dem ersten Material haftet, enthält,

    eine erste Trenneinheit (40), die einen ersten rohrförmigen Abschnitt (42) hat, in dem erste Löcher (42a) gebildet sind, die dem zweiten Material, das in dem Verarbeitungsziel enthalten ist, das durch die erste Zerkleinerungseinheit (30) zerkleinert ist, erlauben,

    hindurch zu verlaufen ohne dem ersten Material zu erlauben, hindurch zu verlaufen, und die das zweite Material, das durch die ersten Löcher (42a) verläuft, von dem Verarbeitungsziel trennt, durch Drehen des ersten rohrförmigen Abschnitts (42) in einem Zustand, in dem das Verarbeitungsziel, das durch die erste Zerkleinerungseinheit (30) zerkleinert ist, in dem ersten rohrförmigen Abschnitt (42) aufgenommen ist,

    wobei die erste Trenneinheit (40) im Inneren des ersten rohrförmigen Abschnitts (42) eine erste Drehstange (46), die eine Mittelachse hat, die mit der Mittelachse des ersten rohrförmigen Abschnitts (42) übereinstimmt, und bereitgestellt ist, um um die Mittelachse der ersten Drehstange (46) drehbar zu sein, wobei die Trennvorrichtung dadurch gekennzeichnet ist, dass eine erste Rippe (44) auf einer inneren Umfangsfläche des ersten rohrförmigen Abschnitts (42) bereitgestellt ist, wobei sich die Rippe in eine Richtung erstreckt, in die sich eine Mittelachse des ersten rohrförmigen Abschnitts (42) erstreckt, und ein erstes Schraubenelement (48) aufweist, das spiralförmig um die erste Drehstange (46) bereitgestellt ist und mehrere Zähne (49) hat, die in dem ersten Schraubenelement (48) gebildet sind.


     
    2. Trennvorrichtung nach Anspruch 1,
    wobei "p" der ersten Rippen (44) vorliegen, wobei "p" eine ganze Zahl zwischen einschließlich 3 und 5 ist, und "p" erste Rippen (44) auf der inneren Umfangsfläche des ersten rohrförmigen Abschnitts (42) in regelmäßigen Intervallen angeordnet sind.
     
    3. Trennvorrichtung nach Anspruch 1 oder 2, umfassend ein erstes Luftrohr (76) zum Übertragen des Verarbeitungsziels, das durch die erste Zerkleinerungseinheit (30) zerkleinert ist, zu der ersten Trenneinheit (40) mittels Druckluft,
    wobei das erste Luftrohr (76) einen ersten Abschnitt (76a) hat, der sich in eine erste Richtung erstreckt, und einen zweiten Abschnitt (76b), der mit dem ersten Abschnitt (76a) auf einer stromabwärtigen Seite des ersten Abschnitts (76a) verbunden ist und der sich in eine zweite Richtung im Wesentlichen orthogonal zu der ersten Richtung erstreckt.
     
    4. Trennvorrichtung nach Anspruch 3, umfassend eine erste unebene Fläche (77a), die in einem Verbindungsabschnitt zwischen dem ersten Abschnitt (76a) und dem zweiten Abschnitt (76b) des ersten Luftrohrs (76) vorliegt und mit der das Verarbeitungsziel, das durch den ersten Abschnitt (76a) übertragen wird, kollidiert.
     
    5. Trennvorrichtung nach Anspruch 3 oder 4,
    wobei das erste Luftrohr (76) einen dritten Abschnitt (76c) hat, der mit dem zweiten Abschnitt (76b) auf einer stromabwärtigen Seite des zweiten Abschnitts (76b) verbunden ist und der sich in eine dritte Richtung im Wesentlichen orthogonal zu der zweiten Richtung erstreckt.
     
    6. Trennvorrichtung nach Anspruch 5, umfassend eine zweite unebene Fläche (77b), die in einem Verbindungsabschnitt zwischen dem zweiten Abschnitt (76b) und dem dritten Abschnitt (76c) des ersten Luftrohrs (76) vorliegt und mit der das Verarbeitungsziel, das durch den zweiten Abschnitt (76b) übertragen wird, kollidiert.
     
    7. Trennvorrichtung nach einem der Ansprüche 1 bis 6, umfassend:

    eine zweite Zerkleinerungseinheit (10), die das Verarbeitungsziel zerkleinert, und

    eine zweite Trenneinheit (20), die einen zweiten rohrförmigen Abschnitt (22) hat, in dem zweite Löcher (22a) gebildet sind, die dem zweiten Material, das in dem Verarbeitungsziel enthalten ist, das durch die zweite Zerkleinerungseinheit (10) zerkleinert ist, erlauben, hindurch zu verlaufen, ohne dem ersten Material zu erlauben, hindurch zu verlaufen, und die das zweite Material, das durch die zweiten Löcher (22a) verläuft, von dem Verarbeitungsziel trennt, durch Drehen des zweiten rohrförmigen Abschnitts (22) in einem Zustand, in dem das Verarbeitungsziel, das durch die zweite Zerkleinerungseinheit (10) zerkleinert ist, in dem zweiten rohrförmigen Abschnitt (22) aufgenommen ist,

    wobei die erste Zerkleinerungseinheit (30) das Verarbeitungsziel zerkleinert, von dem das zweite Material, das durch die zweiten Löcher (22a) verläuft, durch die zweite Trenneinheit (20) getrennt wird.


     
    8. Trennvorrichtung nach Anspruch 7,
    wobei die zweite Trenneinheit (20) im Inneren des zweiten rohrförmigen Abschnitts (22) Folgendes aufweist:

    eine zweite Drehstange (26), die eine Mittelachse hat, die mit einer Mittelachse des zweiten rohrförmigen Abschnitts (22) übereinstimmt, und bereitgestellt ist, um um die Mittelachse der zweiten Drehstange (26) drehbar zu sein, und

    ein zweites Schraubenelement (28), das spiralförmig um die zweite Drehstange (26) bereitgestellt ist und mehrere Zähne (29) hat, die in dem zweiten Schraubenelement (28) gebildet sind.


     
    9. Trennvorrichtung nach Anspruch 7 oder 8,
    wobei ein Bereich jedes der ersten Löcher (42a) in einer Draufsicht kleiner ist als ein Bereich jedes der zweiten Löcher (22a) in einer Draufsicht.
     
    10. Trennvorrichtung nach einem der Ansprüche 1 bis 9, umfassend:

    eine dritte Zerkleinerungseinheit (50), die das Verarbeitungsziel zerkleinert, von dem das zweite Material, das durch die ersten Löcher (42a) verläuft, durch die erste Trenneinheit (40) getrennt wird, und

    eine dritte Trenneinheit (60), die einen dritten rohrförmigen Abschnitt (62) hat, in dem dritte Löcher (62a) gebildet sind, die dem zweiten Material, das in dem Verarbeitungsziel enthalten ist, das durch die dritte Zerkleinerungseinheit (50) zerkleinert ist, erlauben, hindurch zu verlaufen, ohne dem ersten Material zu erlauben, hindurch zu verlaufen, und die das zweite Material, das durch die dritten Löcher (62a) verläuft, von dem Verarbeitungsziel trennt, durch Drehen des dritten rohrförmigen Abschnitts (62) in einem Zustand, in dem das Verarbeitungsziel, das durch die dritte Zerkleinerungseinheit (50) zerkleinert ist, in dem dritten rohrförmigen Abschnitt (62) aufgenommen ist.


     
    11. Trennvorrichtung nach Anspruch 10,
    wobei die dritte Trenneinheit (60) im Inneren des dritten rohrförmigen Abschnitts (62) Folgendes aufweist:

    eine dritte Drehstange (66), die eine Mittelachse hat, die mit einer Mittelachse des dritten rohrförmigen Abschnitts (62) übereinstimmt, und bereitgestellt ist, um um die Mittelachse der dritten Drehstange (66) drehbar zu sein, und

    ein drittes Schraubenelement (68), das spiralförmig um die dritte Drehstange (66) bereitgestellt ist und mehrere Zähne (69) hat, die in dem dritten Schraubenelement (68) gebildet sind.


     
    12. Trennvorrichtung nach Anspruch 10 oder 11,
    wobei ein Bereich jedes der dritten Löcher (62a) in einer Draufsicht kleiner ist als ein Bereich jedes der ersten Löcher (42a) in einer Draufsicht.
     


    Revendications

    1. Dispositif de séparation (1) comprenant :

    une première unité de déchiquetage (30) qui déchiquette une cible à traiter contenant un premier matériau et un second matériau adhérant au premier matériau ;

    une première unité de séparation (40) qui présente une première partie tubulaire (42) dans laquelle des premiers trous (42a), qui permettent au second matériau contenu dans la cible à traiter déchiquetée par la première unité de déchiquetage (30) de passer au travers sans permettre au premier matériau de passer au travers, sont formés, et qui sépare le second matériau passant au travers des premiers trous (42a) de la cible à traiter en faisant tourner la première partie tubulaire (42) dans un état dans lequel la cible à traiter déchiquetée par la première unité de déchiquetage (30) est reçue dans la première partie tubulaire (42), la première unité de séparation (40) comportant à l'intérieur de la première partie tubulaire (42) une première tige rotative (46) qui présente un axe central coïncidant avec l'axe central de la première partie tubulaire (42) et est prévue de manière à pouvoir tourner autour de l'axe central de la première tige rotative (46),

    le dispositif de séparation étant caractérisé en ce qu'une première arête (44) est prévue sur une surface circonférentielle intérieure de la première partie tubulaire (42), l'arête s'étendant dans une direction dans laquelle un axe central de la première partie tubulaire (42) s'étend et un premier élément de vis (48) est prévu de manière hélicoïdale autour de la première tige rotative (46) et présente une pluralité de dents (49) formées dans le premier élément de vis (48).


     
    2. Dispositif de séparation selon la revendication 1,
    dans lequel « p » desdites premières arêtes (44) sont présentes, « p » étant un nombre entier entre 3 et 5 inclus, et les « p » premières arêtes (44) sont agencées sur la surface circonférentielle intérieure de la première partie tubulaire (42) à intervalles réguliers.
     
    3. Dispositif de séparation selon la revendication 1 ou 2, comprenant un premier tuyau d'air (76) pour transférer la cible à traiter déchiquetée par la première unité de déchiquetage (30) vers la première unité de séparation (40) avec de l'air comprimé,
    dans lequel le premier tuyau d'air (76) présente une première partie (76a) qui s'étend dans une première direction et une deuxième partie (76b) qui est reliée à la première partie (76a) sur un côté en aval de la première partie (76a) et qui s'étend dans une deuxième direction sensiblement orthogonale à la première direction.
     
    4. Dispositif de séparation selon la revendication 3, comprenant une première surface inégale (77a) qui est présente dans une partie de liaison entre la première partie (76a) et la deuxième partie (76b) du premier tuyau d'air (76) et avec laquelle la cible à traiter transférée à travers la première partie (76a) entre en collision.
     
    5. Dispositif de séparation selon la revendication 3 ou 4, dans lequel le premier tuyau d'air (76) présente une troisième partie (76c) qui est reliée à la deuxième partie (76b) sur un côté en aval de la deuxième partie (76b) et qui s'étend dans une troisième direction sensiblement orthogonale à la deuxième direction.
     
    6. Dispositif de séparation selon la revendication 5, comprenant une seconde surface inégale (77b) qui est présente dans une partie de liaison entre la deuxième partie (76b) et la troisième partie (76c) du premier tuyau d'air (76) et avec laquelle la cible à traiter transférée à travers la deuxième partie (76b) entre en collision.
     
    7. Dispositif de séparation selon une quelconque des revendications 1 à 6, comprenant :

    une deuxième unité de déchiquetage (10) qui déchiquette la cible à traiter ; et

    une deuxième unité de séparation (20) qui présente une deuxième partie tubulaire (22) dans laquelle des deuxièmes trous (22a), qui permettent au second matériau contenu dans la cible à traiter déchiquetée par la deuxième unité de déchiquetage (10) de passer au travers sans permettre au premier matériau de passer au travers, sont formés, et qui sépare le second matériau passant au travers des deuxièmes trous (22a) de la cible à traiter en faisant tourner la deuxième partie tubulaire (22) dans un état dans lequel la cible à traiter déchiquetée par la deuxième unité de déchiquetage (10) est reçue dans la deuxième partie tubulaire (22),

    dans lequel la première unité de déchiquetage (30) déchiquette la cible à traiter à partir de laquelle le second matériau passant au travers des deuxièmes trous (22a) est séparé par la deuxième unité de séparation (20).


     
    8. Dispositif de séparation selon la revendication 7,
    dans lequel la deuxième unité de séparation (20) comporte à l'intérieur de la deuxième partie tubulaire (22) :

    une deuxième tige rotative (26) qui présente un axe central coïncidant avec un axe central de la deuxième partie tubulaire (22) et est prévue de manière à pouvoir tourner autour de l'axe central de la deuxième tige rotative (26) ; et

    un deuxième élément de vis (28) qui est prévu de manière hélicoïdale autour de la deuxième tige rotative (26) et présente une pluralité de dents (29) formées dans le deuxième élément de vis (28).


     
    9. Dispositif de séparation selon la revendication 7 ou 8, dans lequel une zone de chacun des premiers trous (42a) dans une vue en plan est plus petite qu'une zone de chacun des deuxièmes trous (22a) dans une vue en plan.
     
    10. Dispositif de séparation selon une quelconque des revendications 1 à 9, comprenant :

    une troisième unité de déchiquetage (50) qui déchiquette la cible à traiter à partir de laquelle le second matériau passant au travers des premiers trous (42a) est séparé par la première unité de séparation (40) ; et

    une troisième unité de séparation (60) qui présente une troisième partie tubulaire (62) dans laquelle des troisièmes trous (62a), qui permettent au second matériau contenu dans la cible à traiter déchiquetée par la troisième unité de déchiquetage (50) de passer au travers sans permettre au premier matériau de passer au travers, sont formés, et qui sépare le second matériau passant au travers des troisièmes trous (62a) de la cible à traiter en faisant tourner la troisième partie tubulaire (62) dans un état dans lequel la cible à traiter déchiquetée par la troisième unité de déchiquetage (50) est reçue dans la troisième partie tubulaire (62).


     
    11. Dispositif de séparation selon la revendication 10,
    dans lequel la troisième unité de séparation (60) comporte à l'intérieur de la troisième partie tubulaire (62) :

    une troisième tige rotative (66) qui présente un axe central coïncidant avec un axe central de la troisième partie tubulaire (62) et est prévue de manière à pouvoir tourner autour de l'axe central de la troisième tige rotative (66) ; et

    un troisième élément de vis (68) qui est prévu de manière hélicoïdale autour de la troisième tige rotative (66) et présente une pluralité de dents (69) formées dans le troisième élément de vis (68).


     
    12. Dispositif de séparation selon la revendication 10 ou 11, dans lequel une zone de chacun des troisièmes trous (62a) dans une vue en plan est plus petite qu'une zone de chacun des premiers trous (42a) dans une vue en plan.
     




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    Cited references

    REFERENCES CITED IN THE DESCRIPTION



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    Patent documents cited in the description