JP2017122286A - Sheet processing apparatus and sheet processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet processing apparatus capable of separating a high portion and a low portion of printing density from each other without the need of large-sized facilities, and the like.SOLUTION: A sheet processing apparatus includes: an image acquisition section reading out an image of a sheet supplied; a charging section charging the sheet; an adherence section causing liquid to adhere to at least a part of the sheet charged on the basis of the image acquired by the image acquisition section; a shredding section fibrillating or shredding the sheet to which the liquid adheres by the adherence section into finely divided materials; and an adsorption section being charged with first potential and adsorbing the finely divided materials including portions charged.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a sheet processing apparatus and a sheet processing method.

  Patent Document 1 discloses a wet deinking pulp manufacturing method in which ink is separated from pulp using a chemical. Patent Document 2 discloses a paper erase machine that regenerates used paper by coating only a writing portion with ground color toner or ink.

JP 2001-279589 A JP-A-5-11664

  In the deinked pulp manufacturing method disclosed in Patent Document 1, a large facility is required to handle a large amount of chemicals and treated water. Further, in the paper erase machine disclosed in Patent Document 2, although it is difficult to see the print, there is a possibility that the print mark remains and is read.

  One of the objects according to some aspects of the present invention is a sheet processing capable of separating a dark portion and a dark portion (for example, a printed portion and a non-printed portion) without requiring a large facility. An apparatus and a sheet processing method are provided.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following aspects or application examples.

  (1) One aspect of the sheet processing apparatus according to the present invention is charged based on an image acquisition unit that reads an image of a supplied sheet, a charging unit that charges the sheet, and an image acquired by the image acquisition unit. An adhering part for adhering liquid to at least a part of the sheet, a refining part for defibrating or fragmenting the sheet adhering liquid by the adhering part to make a fine object, and an adsorbing part charged to the first potential And an adsorbing part that adsorbs a fine object including a charged part.

  In such a sheet processing apparatus, a liquid is attached to a part of a charged sheet (for example, a part having a high printing density) to form a fine object, and the charged part is absorbed by an adsorption part charged to a first potential. By adsorbing the fine matter contained therein, it is possible to roughly separate the dark portion and the dark portion without requiring a large facility.

  (2) In the sheet processing apparatus according to the present invention, the adhering portion may be a discharge device that discharges liquid onto the sheet.

  In such a sheet processing apparatus, the liquid can be accurately attached to a portion having a high printing density or a thin portion (printing portion or non-printing portion).

(3) The sheet processing apparatus according to the present invention may further include a volume reducing unit that compresses and reduces at least one of the fine objects adsorbed by the adsorption unit or the fine objects remaining without being adsorbed. Good.

  In such a sheet processing apparatus, the storage space can be reduced by reducing the volume of fine objects.

  (4) In the sheet processing apparatus according to the present invention, the sheet processing apparatus further includes a determination unit that determines a print portion and a non-print portion based on the image acquired by the image acquisition unit, and the attachment portion is determined by the determination unit. Based on the determination result, liquid may be attached to either the printed portion or the non-printed portion.

  In such a sheet processing apparatus, the printed portion and the non-printed portion can be roughly separated.

  (5) In the sheet processing apparatus according to the present invention, the attachment unit attaches a liquid to the print portion, and deposits a mixture of a fine material adsorbed by the adsorption unit and a binder; It may further include a forming unit that forms a sheet by heating the deposit deposited by the deposition unit.

  In such a sheet processing apparatus, a finer sheet including a non-printed portion is reproduced as a new sheet, whereby a cleaner sheet can be manufactured.

  (6) In the sheet processing apparatus according to the present invention, the adhering portion deposits a liquid that adheres to the non-printed portion and deposits a mixture of the fine matter and the binder remaining without being adsorbed by the adsorbing portion. And a forming unit that forms a sheet by heating the deposit deposited by the deposition unit.

  In such a sheet processing apparatus, a finer sheet including a non-printed portion is reproduced as a new sheet, whereby a cleaner sheet can be manufactured.

  (7) One aspect of the sheet processing method according to the present invention includes an image acquisition step of reading an image of a supplied sheet, a charging step of charging the sheet, and the charging based on the image acquired by the image acquisition step. An adhesion process for attaching a liquid to at least a part of the sheet charged by the process, a micronization process for defibration or fragmentation of the sheet to which the liquid is adhered by the adhesion process into a fine object, and charging An adsorption step of adsorbing a fine object including a portion by electrostatic force.

  In such a sheet processing method, a liquid is attached to a part of a charged sheet (for example, a portion having a high printing density) to form a fine object, and the portion is charged by, for example, an adsorption portion charged to a first potential. By adsorbing a fine material containing, a portion having a high printing density and a thin portion can be roughly separated without requiring a large facility.

It is a figure which shows typically the sheet manufacturing apparatus to which the sheet processing apparatus which concerns on this embodiment is applied. It is a figure which shows typically an example of the supply part (sheet processing apparatus) which concerns on 1st Embodiment. It is a figure which shows typically an example of the supply part (sheet processing apparatus) which concerns on 2nd Embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The embodiments described below do not unduly limit the contents of the present invention described in the claims. In addition, not all of the configurations described below are essential constituent requirements of the present invention.

1. Overall Configuration First, a sheet manufacturing apparatus to which a sheet processing apparatus according to this embodiment is applied will be described with reference to the drawings. FIG. 1 is a diagram schematically illustrating a sheet manufacturing apparatus 100 to which the sheet processing apparatus according to the present embodiment is applied.

  As shown in FIG. 1, the sheet manufacturing apparatus 100 includes a supply unit 10, a manufacturing unit 102, and a control unit 104. The manufacturing unit 102 manufactures a sheet. The manufacturing unit 102 includes a crushing unit 12, a defibrating unit 20, a sorting unit 40, a first web forming unit 45, a rotating body 49, a mixing unit 50, a depositing unit 60, and a second web forming unit. 70, a sheet forming unit 80, and a cutting unit 90.

  The supply unit 10 (an example of a sheet processing apparatus) supplies raw materials to the crushing unit 12. The supply unit 10 is, for example, an automatic input unit for continuously supplying raw materials to the crushing unit 12. The raw material supplied by the supply part 10 contains fibers, such as a used paper and a pulp sheet, for example.

  The crushing unit 12 cuts the raw material supplied by the supply unit 10 into air into pieces. The shape and size of the strip is, for example, a strip of several cm square. In the illustrated example, the crushing unit 12 has a crushing blade 14, and the charged raw material can be cut by the crushing blade 14. As the crushing part 12, a shredder is used, for example. The raw material cut by the crushing unit 12 is received by the hopper 1 and then transferred (conveyed) to the defibrating unit 20 through the pipe 2.

  The defibrating unit 20 defibrates the raw material cut by the crushing unit 12. Here, “defibration” means unraveling a raw material (a material to be defibrated) formed by binding a plurality of fibers into individual fibers. The defibrating unit 20 also has a function of separating substances such as resin particles, ink, toner, and a bleeding inhibitor adhering to the raw material from the fibers.

  What has passed through the defibrating unit 20 is referred to as “defibrated material”. In addition to the defibrated fibers that have been unraveled, the “defibrated material” includes resin particles (resins that bind multiple fibers together), ink, toner, etc. In some cases, additives such as colorants, anti-bleeding materials, and paper strength enhancing agents are included. The shape of the defibrated material that has been unraveled is a string shape or a ribbon shape. The unraveled defibrated material may exist in an unentangled state (independent state) with other undisentangled fibers, or entangled with other undisentangled defibrated material to form a lump. It may exist in a state (a state forming a so-called “dama”).

  The defibrating unit 20 performs defibration by a dry method. Here, performing a process such as defibration in the air (in the air), not in the liquid, is called dry. As the defibrating unit 20, an impeller mill is used in the present embodiment. The defibrating unit 20 has a function of generating an air flow that sucks the raw material and discharges the defibrated material. As a result, the defibrating unit 20 can suck the raw material together with the airflow from the introduction port 22 with the airflow generated by itself, defibrate, and transport the defibrated material to the discharge port 24. The defibrated material that has passed through the defibrating unit 20 is transferred to the sorting unit 40 via the tube 3. In addition, the airflow for conveying a defibrated material from the defibrating unit 20 to the sorting unit 40 may use an airflow generated by the defibrating unit 20, or an airflow generation device such as a blower is provided, May be used.

  The sorting unit 40 introduces the defibrated material defibrated by the defibrating unit 20 from the introduction port 42 and sorts the defibrated material according to the length of the fiber. The sorting unit 40 includes a drum unit 41 and a housing unit 43 that accommodates the drum unit 41. As the drum part 41, for example, a sieve is used. The drum portion 41 has a net (filter, screen), fibers or particles smaller than the mesh size of the mesh (one passing through the mesh, the first selection), and fibers larger than the mesh size of the mesh. Undefibrated pieces and lumps (those that do not pass through the net, second sort) can be separated. For example, the first selection is transferred to the mixing unit 50 via the pipe 7. The second selected item is returned to the defibrating unit 20 from the discharge port 44 through the pipe 8. Specifically, the drum part 41 is a cylindrical sieve that is rotationally driven by a motor. As the net of the drum portion 41, for example, a metal net, an expanded metal obtained by extending a cut metal plate, or a punching metal in which a hole is formed in the metal plate by a press machine or the like is used.

  The first web forming unit 45 conveys the first sorted product that has passed through the sorting unit 40 to the mixing unit 50. The first web forming unit 45 includes a mesh belt 46, a stretching roller 47, and a suction unit (suction mechanism) 48.

  The suction unit 48 can suck the first sorted matter dispersed in the air through the opening (opening of the mesh) of the sorting unit 40 onto the mesh belt 46. The first selection is deposited on the moving mesh belt 46 to form the web V. The basic configurations of the mesh belt 46, the stretching roller 47, and the suction unit 48 are the same as the mesh belt 72, the stretching roller 74, and the suction mechanism 76 of the second web forming unit 70 described later.

  The web V is formed in a soft and swelled state containing a lot of air by passing through the sorting unit 40 and the first web forming unit 45. The web V deposited on the mesh belt 46 is put into the tube 7 and conveyed to the mixing unit 50.

  The rotating body 49 can cut the web V before the web V is conveyed to the mixing unit 50. In the illustrated example, the rotator 49 has a base 49a and a protrusion 49b protruding from the base 49a. The protrusion 49b has, for example, a plate shape. In the illustrated example, four protrusions 49b are provided, and four protrusions 49b are provided at equal intervals. When the base 49a rotates in the direction R, the protrusion 49b can rotate around the base 49a. By cutting the web V by the rotating body 49, for example, the fluctuation in the amount of defibrated material per unit time supplied to the deposition unit 60 can be reduced.

  The rotating body 49 is provided in the vicinity of the first web forming portion 45. In the illustrated example, the rotating body 49 is provided in the vicinity of the stretching roller 47a located on the downstream side in the path of the web V (next to the stretching roller 47a). The rotating body 49 is provided at a position where the protrusion 49b can come into contact with the web V and not in contact with the mesh belt 46 on which the web V is deposited. Thereby, it is possible to suppress the mesh belt 46 from being worn (damaged) by the protrusion 49b. The shortest distance between the protrusion 49b and the mesh belt 46 is, for example, 0.05 mm or more and 0.5 mm or less, and is a distance at which the mesh belt 46 can be cut without being damaged.

  The mixing unit 50 mixes the first sorted product that has passed through the sorting unit 40 (the first sorted product conveyed by the first web forming unit 45) and the additive containing resin. The mixing unit 50 includes an additive supply unit 52 that supplies the additive, a pipe 54 that conveys the first selected product and the additive, and a blower 56. In the illustrated example, the additive is supplied from the additive supply unit 52 to the pipe 54 via the hopper 9. The tube 54 is continuous with the tube 7.

In the mixing unit 50, an air flow is generated by the blower 56, and the first selection product and the additive can be mixed and conveyed in the pipe 54. In addition, the mechanism which mixes a 1st selection material and an additive is not specifically limited, It may stir with the blade | wing which rotates at high speed, and uses rotation of a container like a V-type mixer. There may be.

  As the additive supply unit 52, a screw feeder as shown in FIG. 1 or a disk feeder (not shown) is used. The additive supplied from the additive supply unit 52 includes a resin (binding agent) for binding a plurality of fibers. At the time when the resin is supplied, the plurality of fibers are not bound. The resin melts when passing through the sheet forming portion 80 and binds a plurality of fibers.

  The resin supplied from the additive supply unit 52 is a thermoplastic resin or a thermosetting resin. For example, AS resin, ABS resin, polypropylene, polyethylene, polyvinyl chloride, polystyrene, acrylic resin, polyester resin, polyethylene terephthalate, Polyphenylene ether, polybutylene terephthalate, nylon, polyamide, polycarbonate, polyacetal, polyphenylene sulfide, polyether ether ketone, and the like. These resins may be used alone or in combination. The additive supplied from the additive supply unit 52 may be fibrous or powdery.

  In addition to the resin that binds the fibers, the additive supplied from the additive supply unit 52 includes a colorant for coloring the fibers, a fiber agglomeration, and a resin, depending on the type of sheet to be manufactured. An agglomeration inhibitor for suppressing agglomeration of the fiber and a flame retardant for making the fiber difficult to burn may be included. The mixture (mixture of the first selection product and the additive) that has passed through the mixing unit 50 is transferred to the deposition unit 60 via the pipe 54.

  The depositing unit 60 introduces the mixture that has passed through the mixing unit 50 from the introduction port 62, loosens the entangled defibrated material (fibers), and lowers it while dispersing it in the air. Furthermore, when the additive resin supplied from the additive supply unit 52 is fibrous, the deposition unit 60 loosens the entangled resin. Thereby, the deposition unit 60 can deposit the mixture on the second web forming unit 70 with good uniformity.

  The deposition unit 60 includes a drum unit 61 and a housing unit 63 that accommodates the drum unit 61. As the drum part 61, a rotating cylindrical sieve is used. The drum unit 61 has a net, and drops fibers or particles (those that pass through the net) included in the mixture that has passed through the mixing unit 50 that are smaller than the mesh opening size. The configuration of the drum unit 61 is the same as the configuration of the drum unit 41, for example.

  In addition, the “sieving” of the drum unit 61 may not have a function of selecting a specific object. That is, the “sieving” used as the drum part 61 means a thing provided with a net, and the drum part 61 may drop all of the mixture introduced into the drum part 61.

  The second web forming unit 70 deposits the passing material that has passed through the deposition unit 60 to form the web W. The second web forming unit 70 includes, for example, a mesh belt 72, a tension roller 74, and a suction mechanism 76.

While moving, the mesh belt 72 accumulates the passing material that has passed through the opening of the accumulation unit 60 (the opening of the mesh). The mesh belt 72 is stretched by a stretching roller 74, and is configured to allow air to pass therethrough. The mesh belt 72 moves as the stretching roller 74 rotates. While the mesh belt 72 continuously moves, the passing material that has passed through the accumulation portion 60 is continuously piled up, whereby the web W is formed on the mesh belt 72. The mesh belt 72 is made of, for example, metal, resin, cloth, or non-woven fabric.

  The suction mechanism 76 is provided below the mesh belt 72 (on the side opposite to the accumulation unit 60 side). The suction mechanism 76 can generate an air flow directed downward (air flow directed from the accumulation unit 60 toward the mesh belt 72). By the suction mechanism 76, the mixture dispersed in the air by the deposition unit 60 can be sucked onto the mesh belt 72. Thereby, the discharge speed from the deposition part 60 can be increased. Furthermore, the suction mechanism 76 can form a downflow in the dropping path of the mixture, and can prevent the defibrated material and additives from being entangled during the dropping.

  As described above, the web W in a state where it contains a lot of air and is softly swollen is formed by passing through the deposition unit 60 and the second web forming unit 70 (web forming step). The web W deposited on the mesh belt 72 is conveyed to the sheet forming unit 80.

  In the illustrated example, a humidity control unit 78 that adjusts the humidity of the web W is provided. The humidity control unit 78 can adjust the amount ratio of the web W and water by adding water or water vapor to the web W.

  The sheet forming unit 80 (forming unit) pressurizes and heats the web W (deposit) deposited on the mesh belt 72 to form the sheet S. In the sheet forming unit 80, by heating the mixture of the defibrated material and the additive mixed in the web W, the plurality of fibers in the mixture are bound to each other via the additive (resin). Can do.

  The sheet forming unit 80 includes a pressurizing unit 82 that pressurizes the web W, and a heating unit 84 that heats the web W pressed by the pressurizing unit 82. The pressurizing unit 82 includes a pair of calendar rollers 85 and applies pressure to the web W. The web W is pressed to reduce its thickness, and the density of the web W is increased. As the heating unit 84, for example, a heating roller (heater roller), a hot press molding machine, a hot plate, a hot air blower, an infrared heater, or a flash fixing device is used. In the illustrated example, the heating unit 84 includes a pair of heating rollers 86. By forming the heating unit 84 as the heating roller 86, the sheet S is formed while the web W is continuously conveyed as compared with the case where the heating unit 84 is configured as a plate-like pressing device (flat plate pressing device). Can do. Here, the calendar roller 85 (pressure unit 82) can apply a pressure higher than the pressure applied to the web W by the heating roller 86 (heating unit 84). The number of calendar rollers 85 and heating rollers 86 is not particularly limited.

  The cutting unit 90 cuts the sheet S formed by the sheet forming unit 80. In the illustrated example, the cutting unit 90 includes a first cutting unit 92 that cuts the sheet S in a direction that intersects the conveyance direction of the sheet S, and a second cutting unit 94 that cuts the sheet S in a direction parallel to the conveyance direction. ,have. The second cutting unit 94 cuts the sheet S that has passed through the first cutting unit 92, for example.

  Thus, a single-sheet sheet S having a predetermined size is formed. The cut sheet S is discharged to the discharge unit 96.

2. Configuration of Supply Unit (Sheet Processing Apparatus) FIG. 2 is a diagram schematically illustrating an example of the supply unit 10 according to the first embodiment. The supply unit 10 includes a supply device 110, an image acquisition unit 120, a charging unit 130, a determination unit 140, an attachment unit 150, a miniaturization unit 160, an adsorption unit 170, and a conveyance unit 180. ing.

The supply device 110 supplies the raw material to the image acquisition unit 120. The supply device 110 is, for example,
This is an automatic input unit for continuously supplying raw materials to the image acquisition unit 120. The raw material supplied by the supply device 110 is a single sheet such as printed waste paper.

  The image acquisition unit 120 reads an image of the sheet supplied by the supply device 110 (images the sheet). As the image acquisition unit 120, for example, a scanner device provided with a line sensor or the like is used.

  The charging unit 130 charges the sheet. The charging unit 130 includes a charging blade 131 that frictionally charges the sheet. Although a steel metal blade is used as the charging blade 131 here, a hard rubber resin blade may be used. The charging blade 131 has a length equal to or longer than the sheet in the width direction of the sheet. By collectively rubbing the sheet with the charging blade 131, the sheet can be uniformly and positively charged. This is because the sheet (paper) is positioned on the positive side of the metal blade (steel) in the triboelectric train. The charging unit 130 may be configured by a charging device such as a corotron or a scorotron. By using a charging device as the charging unit 130, the sheet can be uniformly charged positively or negatively.

  Based on the image acquired by the image acquisition unit 120, the determination unit 140 determines a printed portion (printed region) and a non-printed portion (non-printed region) on the sheet, and determines the determination result (sheet The position, size, and shape of the printed part) are supplied to the attachment unit 150.

  The attaching unit 150 attaches the liquid to the printed portion of the sheet charged by the charging unit 130 based on the determination result by the determining unit 140. The adhering unit 150 includes an ink jet head 151 (ejection device), and ejects and adheres liquid to the printed portion of the sheet. As the liquid to which the sheet is attached, water or an aqueous solution containing water as a main component is used. As the aqueous solution, a dispersion obtained by dividing a clogging preventive agent such as a humectant into water is used. When water or an aqueous solution is attached to the printed portion of the sheet, the charged charge in the printed portion disappears, and only the printed portion becomes uncharged (potential is 0). Note that the charged state is maintained for the non-printed portion to which no liquid is attached. Here, a conductive platen may be provided on the opposite side of the inkjet head 151 across the sheet, and this may be used as a charge conduction path. In addition, when the sheet is hindered due to the liquid adhering to the sheet, a dryer for drying the sheet may be provided on the downstream side of the adhesion unit 150 in the conveyance direction. Even when the sheet is dried, the non-charged state of the portion to which the liquid is adhered is maintained.

  The miniaturization unit 160 defibrates or divides the sheet on which the liquid is adhered by the adhesion unit 150 into a fine object. As the miniaturization unit 160, a shredder that shreds a sheet or a defibrator such as an impeller mill that defibrates a sheet is used.

  The adsorption unit 170 adsorbs a fine object including a charged part (non-printed part) by electrostatic force. The adsorption unit 170 includes a roller 171, a first conveyance belt 172 (electrostatic adsorption belt), and a charging device 173. The first transport belt 172 is stretched around the roller 171 and is rotationally driven by the roller 171. The first conveyor belt 172 is negatively charged (an example of a first potential) by a charging device 173 such as a corotron or a scorotron.

  The transport unit 180 transports fine objects. The transport unit 180 includes a roller 181 and a second transport belt 182. The second conveyor belt 182 is stretched around the roller 181 and is rotationally driven by the roller 181. The first conveyor belt 172 is provided such that its suction surface 172a faces the conveyor surface 182a of the second conveyor belt 182.

Fine objects defibrated or fragmented by the miniaturization unit 160 are conveyed by the second conveyance belt 182. Among the fine objects moving on the second conveyor belt 182, positively charged fine objects (fine objects including more non-printed parts than printed parts) are negatively charged to the first conveyor belt 172. It flies away and is adsorbed by the adsorption surface 172a and conveyed by the first conveyance belt 172. Then, the fine object including many non-printing parts is scraped off by the blade 174 that contacts the first conveying belt 172 and is collected in the first accommodating portion 175. The fine material collected in the first storage unit 175 is supplied to the crushing unit 12 as a raw material of the sheet. Here, in the sheet manufacturing apparatus 100, the rough crushing unit 12 may be omitted, and a fine object including many non-printing parts may be supplied to the defibrating unit 20, or the crushing unit 12 and the defibrating unit 20 may be provided. May be omitted, and a fine object including many non-printing parts may be supplied to the sorting unit 40. Further, a fine material containing many non-printed portions may be supplied as a raw material of the sheet after being compressed and reduced by a volume reduction unit (not shown). By reducing the volume of fine objects, the storage space for the fine objects can be reduced.

  On the other hand, among the fine objects moving on the second conveyor belt 182, fine objects that are not charged (fine objects that include more printed portions than non-printed portions) are not adsorbed by the adsorbing unit 170 and are not adsorbed by the second conveyer belt. 182 remains. Then, the fine matter including a large amount of the printed portion is scraped off by the blade 184 that contacts the second transport belt 182 and is collected in the second storage portion 185. The fine matter collected in the second storage unit 185 is subjected to a volume reduction process (for example, pelletization) by heating or compression by a volume reduction unit (not shown) and reused as fuel, cardboard, or the like. Confidentiality can be reliably ensured by pelletizing fine objects containing many printed parts by heating or the like.

  The charging unit 130 may negatively charge the sheet, and the negatively charged fine object may be attracted to the positively charged first transport belt 172. Further, the suction unit 170 causes liquid to adhere to the non-printed portion (discharging the charged charge of the non-printed portion), and causes the first conveying belt 172 to adsorb the fine matter (charged fine matter) containing a large amount of the printed portion. Further, it may be configured such that a fine object including many non-printed parts (a fine object that is not charged) is left on the second conveying belt 182. In this case, the fine material collected in the second storage unit 185 is supplied as a raw material for the sheet.

  FIG. 3 is a diagram schematically illustrating an example of the supply unit 10 according to the second embodiment. 3, the same components as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted as appropriate.

  The supply unit 10 according to the second embodiment does not have the second transport belt 182 but has a pipe 186 and a blower 187 that transport fine objects. The first transport belt 172 is disposed such that the suction surface 172a is located in the pipe 186 (fine material transport path). The fine object defibrated or fragmented by the finer 160 is air-conveyed through the pipe 186 by the air flow generated by the blower 187.

  Among the fine objects moving in the tube 186, positively charged fine objects (fine objects including many non-printed portions) are negatively charged (an example of the first potential) to the first conveying belt 172. It flies away and is adsorbed by the adsorption surface 172a and conveyed by the first conveyance belt 172. Then, the fine object including many non-printing parts is scraped off by the blade 174 that contacts the first conveying belt 172 and is collected in the first accommodating portion 175. On the other hand, among the fine objects moving through the tube 186, fine particles that are not charged (fine materials containing a large amount of printed portions) are conveyed as they are in the tube 186 and collected in the second storage unit 185.

  The charging unit 130 may negatively charge the sheet, and the negatively charged fine object may be attracted to the positively charged first transport belt 172. Further, the suction unit 170 causes liquid to adhere to the non-printed portion (discharging the charged charge of the non-printed portion), and causes the first conveying belt 172 to adsorb the fine matter (charged fine matter) containing a large amount of the printed portion. Alternatively, a configuration may be adopted in which fine objects including many non-printed portions (uncharged fine objects) are conveyed through the tube 186 as they are.

  As described above, according to the first or second embodiment, the sheet is charged, and liquid is attached to one of the printed portion and the non-printed portion of the charged sheet, so that one of the printed portion and the non-printed portion is non-printed. The other side can be charged while being charged, and then the sheet is defibrated or chopped into fine objects, and the charged fine objects are adsorbed by the adsorption unit 170 charged to the first polarity. Thus, the printing portion and the non-printing portion can be roughly separated without requiring a large facility for handling a large amount of treated water, and can be reused. In addition, since separation is performed using the potential difference between the printed portion and the non-printed portion, deinking (deinking) can be performed efficiently regardless of the type of toner or ink in the printed portion. In particular, even when the printed part of the sheet is printed by the inkjet method and the pigment ink or dye ink penetrates deeply (penetrates), the printed part can be sufficiently separated and easily deinked (reduced). Ink). Furthermore, since a cheap material such as water or an aqueous solution can be used as the liquid to be attached to the sheet, the processing cost of the sheet can be reduced.

  The present invention includes configurations that are substantially the same as the configurations described in the embodiments (for example, configurations that have the same functions, methods, and results, or configurations that have the same objects and effects). In addition, the invention includes a configuration in which a non-essential part of the configuration described in the embodiment is replaced. In addition, the present invention includes a configuration that exhibits the same operational effects as the configuration described in the embodiment or a configuration that can achieve the same object. Further, the invention includes a configuration in which a known technique is added to the configuration described in the embodiment.

DESCRIPTION OF SYMBOLS 1 ... Hopper, 2, 3, 7, 8 ... Pipe, 9 ... Hopper, 10 ... Supply part (sheet processing apparatus), 12 ... Roughing part, 14 ... Roughing blade, 20 ... Defibration part, 22 ... Inlet , 24 ... discharge port, 40 ... sorting portion, 41 ... drum portion, 42 ... introduction port, 43 ... housing portion, 44 ... discharge port, 45 ... first web forming portion, 46 ... mesh belt, 47 ... stretching roller, 48 ... Suction unit, 49 ... Rotating body, 49a ... Base, 49b ... Projection, 50 ... Mixing unit, 52 ... Additive supply unit, 54 ... Pipe, 56 ... Blower, 60 ... Deposition unit, 61 ... Drum unit, 62 DESCRIPTION OF SYMBOLS ... Introduction port, 63 ... Housing part, 70 ... 2nd web formation part, 72 ... Mesh belt, 74 ... Stretching roller, 76 ... Suction mechanism, 78 ... Humidity control part, 80 ... Sheet formation part, 82 ... Pressure part , 84 ... Heating unit, 85 ... Calendar roller, 86 ... Heating roller DESCRIPTION OF SYMBOLS 90 ... Cutting part, 92 ... 1st cutting part, 94 ... 2nd cutting part, 96 ... Discharge part, 100 ... Sheet manufacturing apparatus, 102 ... Manufacturing part, 104 ... Control part, 110 ... Feeding apparatus, 120 ... Image acquisition , 130 ... Charging unit, 131 ... Charging blade, 140 ... Discrimination unit, 150 ... Adhering unit, 151 ... Inkjet head, 160 ... Finening unit, 170 ... Adsorption unit, 171 ... Roller, 172 ... First transport belt, 172a DESCRIPTION OF SYMBOLS ... Adsorption surface, 173 ... Charging device, 174 ... Blade, 175 ... First accommodating portion, 180 ... Conveying portion, 181 ... Roller, 182 ... Second conveying belt, 182a ... Conveying surface, 184 ... Blade, 185 ... Second accommodating Part, 186 ... pipe, 187 ... blower, R ... direction, S ... sheet, V ... web, W ... web

Claims (7)

An image acquisition unit that reads an image of the supplied sheet;
A charging unit for charging the sheet;
Based on the image acquired by the image acquisition unit, an attachment unit for attaching a liquid to at least a part of the charged sheet;
A finer part that defibrates or chops a sheet to which a liquid is adhered by the adhering part to make a fine object;
A sheet processing apparatus comprising: an adsorption unit that is charged to a first potential and that adsorbs a fine object including a charged part.   The sheet processing apparatus according to claim 1, wherein the adhesion portion is a discharge device that discharges a liquid onto a sheet.   The sheet according to claim 1, further comprising a volume reducing unit that compresses and reduces at least one of the fine object adsorbed by the adsorbing part or the fine object remaining without being adsorbed. Processing equipment. Based on the image acquired by the image acquisition unit, further includes a determination unit for determining a printed portion and a non-printed portion,
The said adhesion part adheres a liquid to either the said printing part or the said non-printing part based on the discrimination | determination result by the said discrimination | determination part, The any one of Claims 1-3 characterized by the above-mentioned. Sheet processing equipment. The adhering part adheres liquid to the printed part,
A depositing part for depositing a mixture of fines and binder adsorbed by the adsorbing part;
The sheet processing apparatus according to claim 4, further comprising a forming unit that heats the deposit accumulated by the deposition unit to form a sheet. The adhering part adheres liquid to the non-printing part,
A depositing unit for depositing a mixture of the fines and the binder remaining without being adsorbed by the adsorbing unit;
The sheet processing apparatus according to claim 4, further comprising a forming unit that heats the deposit accumulated by the deposition unit to form a sheet. An image acquisition step of reading an image of the supplied sheet;
A charging step for charging the sheet;
An attaching step of attaching a liquid to at least a part of the sheet charged by the charging step based on the image obtained by the image obtaining step;
A micronization step for defibrating or slicing the sheet to which the liquid has been adhered by the adhesion step,
A sheet processing method comprising: an adsorption step of adsorbing a fine object including a charged portion by electrostatic force.

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