JP2015120318A - Material defibrating device, sheet manufacturing device, material defibrating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a material defibration device that prevents multi feeding of materials supplied from a material supply part.SOLUTION: The device has: a supply part that is loaded with materials and supplies them; a detection part that detects that the plurality of materials are to be supplied together, the detection performed prior to their supply; a crushing part that crushes the materials supplied from the supply part; and a defibration part that defibrates the crushed materials.

Description

  The present invention relates to a material defibrating apparatus, a sheet manufacturing apparatus, and a material defibrating method.

  Conventionally, a crushing unit that crushes paper, a dry defibrating unit that defibrates the crushed paper pieces, a first conveying unit that conveys the defibrated material defibrated by the dry defibrating unit, and a first A classifying unit for performing deinking by classifying the defibrated material conveyed by the conveying unit by airflow, a second conveying unit for conveying the defibrated material deinked by the classifying unit, and a defibration conveyed by the second conveying unit 2. Description of the Related Art A paper recycling apparatus having a paper forming unit that forms paper with a product is known. In the paper recycling apparatus, an automatic feeding mechanism for continuously feeding paper into the dry defibrating unit is provided (for example, see Patent Document 1).

JP 2012-144819 A

  However, in the paper recycling apparatus as described above, when paper is supplied from the automatic feeding mechanism to the dry defibrating unit, there are cases where the paper cannot be supplied if the paper is put in a state where the paper is overlapped by a stapler or a clip. In this case, the apparatus cannot send paper. However, if the apparatus cannot recognize that the paper is not fed, there is a problem in that each part on the downstream side of the automatic feeding mechanism continues to produce the paper. Moreover, when supplying in the state which overlapped, a stapler and a clip will also be supplied together. Thereby, there was a problem that the coarsely pulverized part and the dry defibrating part were damaged.

  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 forms or application examples.

  [Application Example 1] A material defibrating apparatus according to this application example includes a supply unit that mounts and supplies a material, a detection unit that detects that a plurality of the materials are supplied together, and It has a crushing part which crushes the material supplied from the supply part, and a defibrating part which defibrates the crushed material.

  If double feeding in which a plurality of materials are overlapped and supplied together is likely to occur, supply failure tends to occur. However, according to the above configuration, it is detected before supplying that a plurality of materials are supplied together. Thereby, supply failure can be prevented. Moreover, since a stapler and a clip are not supplied to a rough crushing part or a dry defibrating part, damage to a rough crushing part or a dry defibrating part can be prevented. Furthermore, since paper multi-feed is prevented, the supply amount to the defibrating unit is quantified, and the amount of defibrated material in the defibrating unit can be stabilized.

  Application Example 2 The detection unit of the material defibrating apparatus according to the application example described above is characterized in that the material is mounted on the supply unit and the material is scanned in a state where the material is not supplied.

  According to this configuration, it is possible to prevent a material supply failure by scanning in a state where the material is not supplied.

  Application Example 3 The supply unit of the material defibrating apparatus according to the application example supplies the uppermost material among the materials mounted on the supply unit, and the detection unit supplies the uppermost material. It is characterized by scanning.

  According to this configuration, the apparatus configuration can be simplified by supplying the material mounted on the top and scanning the material mounted on the top.

  Application Example 4 Stopping the supply of the material from the supply unit when the detection unit of the material defibrating apparatus according to the application example detects that a plurality of the materials are supplied together. It is characterized by.

  According to this configuration, when it is detected that a plurality of materials are supplied together, the material supply is stopped. For this reason, supply failure can be reliably prevented. Moreover, since the apparatus stops the supply itself, the other units can be appropriately terminated based on the supply stop. Thereby, it is possible to prevent the crushing unit and the defibrating unit from being continuously driven even when the material is not supplied.

  Application Example 5 The material defibrating apparatus according to the application example includes a plurality of the supply units, and the detection unit detects that a plurality of the materials are supplied together in one supply unit. In addition, the material is supplied from another supply unit.

  According to this configuration, even when the target supply unit detects and stops the double feeding of the material in advance, the material can be supplied from another supply unit. Accordingly, the material supply is not stopped, so that the defibrating efficiency of the material can be maintained. Further, the overlapping material can be removed from the target supply unit while the material is supplied from another supply unit.

  Application Example 6 A sheet manufacturing apparatus according to this application example includes a supply unit that mounts and supplies a material, a detection unit that detects that a plurality of the materials are supplied together, and the supply A material defibrating apparatus having a crushing unit for crushing the material supplied from the unit, a defibrating unit for defibrating the crushed material, and a forming unit for forming a sheet using the material And.

  According to this configuration, since it is detected before supplying that a plurality of materials are supplied together, supply failure and the like can be prevented. Furthermore, since paper multi-feed is prevented, the supply amount to the defibrating unit is quantified, and the amount of defibrated material in the defibrating unit can be stabilized. Thereby, the sheet | seat with which the dispersion | variation in thickness was reduced can be manufactured.

  [Application Example 7] In the material defibrating method according to this application example, before the material is loaded and the material is supplied, it is detected that a plurality of the materials are supplied together, and the supplied material is It is characterized by crushing and defibrating the roughly crushed material.

  According to this configuration, when a plurality of materials are overlapped and supplied together, a feeding failure tends to occur, but the overlap of materials is detected before the supply. Thereby, supply failure etc. can be prevented. Furthermore, since paper multi-feed is prevented, the supply amount to the defibrating unit is quantified, and the amount of defibrated material in the defibrating unit can be stabilized.

Schematic which shows the structure of a material defibrating apparatus. Explanatory drawing which shows the example of a detection in a detection part. Schematic which shows the structure of a sheet manufacturing apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, the scale of each member or the like is shown differently from the actual scale so as to make each member or the like recognizable.

  First, the configuration of the material defibrating apparatus will be described. The material defibrating apparatus is, for example, for defibrating a raw material (a material to be defibrated) Pu such as a pure pulp sheet or a waste paper and unwinding it into a fiber shape. The material defibrating device is equipped with a material supply and supply unit, a detection unit for detecting that a plurality of materials are supplied together and being supplied together, and a material supplied from the supply unit is roughly crushed. And a defibrating unit for defibrating the crushed material. Hereinafter, the configuration of the material defibrating apparatus will be specifically described.

  FIG. 1 is a schematic diagram illustrating a configuration of a material defibrating apparatus according to the present embodiment. As shown in FIG. 1, the material defibrating apparatus 5 of this embodiment includes a supply unit 10, a detection unit 9, a crushing unit 20, a defibrating unit 30, and the like. Moreover, the control part 2 which controls these members is provided. A display unit 3, an input unit (not shown), and the like are connected to the control unit 2.

  The supply unit 10 mounts used paper Pu as a material, and supplies the used paper Pu to the crushing unit 20. The supply unit 10 includes, for example, a tray 11 that accumulates and stores a plurality of used paper Pu, and an automatic feeding mechanism 12 that can continuously input the used paper Pu in the tray 11 to the crushing unit 20. The used paper Pu used in the material defibrating apparatus 5 is, for example, A4 size paper that is currently mainstream in offices.

  When the used paper Pu is supplied from the supply unit 10 to the crushing unit 20, the detection unit 9 detects that the used paper Pu is supplied to the crushing unit 20 in an overlapped state before being supplied to the crushing unit 20. To do. As for the detection part 9, the used paper Pu is mounted in the supply part 10. FIG. Then, the used paper Pu is scanned and detected in a state where the used paper Pu is not supplied to the crushing unit 20 side.

  The detection unit 9 is an image scanner, for example, and includes a light emitting unit that emits light while moving with respect to the used paper Pu, and an image sensor that converts the amount of reflected light reflected from the used paper Pu into a voltage value (analog data). I have. Furthermore, the acquired voltage value is converted into digital data, and image processing is performed based on the converted digital data. Thereby, it is possible to detect whether or not the used waste paper Pu that has been scanned overlaps. Specifically, for example, it is determined whether the shape of a metal object such as a stapler (a stapler) or a clip or the shape of a stapleless stapler is recognized from image data generated by image processing, and the used paper Pu is It is possible to determine whether or not they are overlapped. A plurality of used paper Pus being overlapped means a state in which a plurality of used papers Pu are bundled by a stapler, a clip, or the like. For this reason, when it is going to supply the several used paper Pu which has overlapped, the other used paper bundled will be supplied together with the uppermost used paper. Accordingly, when a plurality of materials are supplied together, the plurality of materials are supplied in a state where they are bundled by a stapler, a clip, or the like.

  The scanning range in the detection unit 9 may be the entire surface of the used paper Pu, or only a specified range such as the vicinity of the four sides of the used paper Pu in consideration of the position of a stapler (stapler), a clip, or the like in the used paper Pu. It may be.

  Further, in the supply unit 10 of the present embodiment, the uppermost used paper Pu among the plurality of used paper Pu loaded in the supply unit 10 is supplied to the crushing unit 20, and the detection unit 9 supplies the uppermost used paper Pu. to scan. When the detection unit 9 detects that the used paper Pu is supplied in an overlapping manner, the supply of the used paper Pu from the supply unit 10 is stopped. Specifically, when it is detected that the used paper Pu is supplied in an overlapping manner, the drive of the supply unit 10 is stopped by a drive signal from the control unit 2. Thereby, supply to the crushing part 20 in the state where the used paper Pu overlaps is not performed, and it is possible to prevent the occurrence of conveyance failure in the automatic feeding mechanism 12 and the like.

  The crushing unit 20 cuts the supplied used paper Pu into pieces of several centimeters square. The crushing unit 20 includes a crushing blade 21 and constitutes an apparatus in which the cutting width of a normal shredder blade is widened. Thereby, the supplied used paper Pu can be easily cut into pieces of paper. Then, the cut paper piece is supplied to the defibrating unit 30 via the pipe 201.

  The defibrating unit 30 includes a rotating blade (not shown) that rotates, and performs defibrating to unravel the paper piece supplied from the crushing unit 20 into a fibrous shape. In addition, the defibrating unit 30 of the present embodiment performs defibrating in a dry manner in the air. As a result of the defibrating process of the defibrating unit 30, the printed ink, toner, and the material applied to the paper such as the anti-bleeding material become fibers of several tens of μm or less (hereinafter referred to as “ink particles”). And separate. Therefore, the defibrated material coming out of the defibrating unit 30 becomes fibers and ink particles obtained by defibrating the paper pieces.

  Next, a material defibrating method in the material defibrating apparatus 5 will be described. The material defibrating method according to the present embodiment detects that the materials are supplied in an overlapping manner before the materials are loaded and the materials are supplied, and the supplied materials are crushed and the crushed materials are disassembled. It is something that is delicate. This will be specifically described below.

  First, the used paper Pu as a material is mounted on the supply unit 10. Specifically, the used paper Pu is placed on the tray 11 of the supply unit 10. The used paper Pu is, for example, A4 size paper.

  Next, before the used paper Pu is supplied from the supply unit 10 to the crushing unit 20, it is detected whether the used paper Pu is supplied in an overlapping manner. Specifically, the used paper Pu is scanned by the detection unit 9 in a state where the used paper Pu is not supplied from the supply unit 10 to the crushing unit 20. The detection unit 9 of the present embodiment is an image scanner, and scans the used paper Pu with the image scanner. At this time, the used paper Pu placed on the top among the plurality of used paper Pu placed on the tray 11 of the supply unit 10 is scanned.

  Next, image processing is performed based on the data acquired by the detection unit 9 (image scanner), and image data subjected to the image processing is generated. Then, it is detected whether or not the used paper Pu overlaps based on the generated image data. In the present embodiment, it is determined whether or not the shape of a metal object such as a stapler (stapler) or a clip or the shape of a stapleless stapler or the like is recognized from the image data. FIG. 2 is an explanatory diagram illustrating an example of detection in the detection unit. The image data Ig1 in FIG. 2A shows an example in which the stapler J1 is attached to the used paper Pu '. Image data Ig2 in FIG. 2B shows an example in which the clip J2 is attached to the used paper Pu '. Further, the image data Ig3 in FIG. 2C shows an example in which a stapleless stapler J3 is attached to the used paper Pu '. Then, as shown in FIG. 2, when the shape of a stapler (stapler), a clip, or the like is recognized, it is determined that the used paper Pu is in an overlapped state.

  The scanning range in the detection unit 9 may be the entire surface of the used paper Pu, or only a limited range such as the vicinity of the four sides of the used paper Pu in consideration of the position of the stapler (stapler), the clip, etc. in the used paper Pu. It may be.

  When the detection unit 9 detects that the used paper Pu is supplied in an overlapping manner, the supply of the used paper Pu from the supply unit 10 is stopped. Specifically, when it is detected that the used paper Pu is supplied in an overlapping manner, the drive of the supply unit 10 is stopped by a drive signal from the control unit 2. Thereby, supply to the crushing part 20 in the state where the used paper Pu overlaps is not performed, and it is possible to prevent the occurrence of conveyance failure in the automatic feeding mechanism 12 and the like.

  The supply unit 10 supplies used paper Pu one by one. However, when multiple sheets of used paper Pu are stacked, it tries to supply only the uppermost sheet, but it is bundled with staples and clips, so other used paper is bundled together with the uppermost sheet. Also trying to supply. However, since the supply unit 10 has only the ability to send one sheet at a time, if the number of sheets is large, it cannot be sent, resulting in a supply failure. Further, if the number of sheets is small, the sheet can be supplied, but if the sheet is supplied with a stapler or a clip, the crushing unit 20 and the defibrating unit 30 are damaged. This is the same when detecting after coarse crushing or defibration.

  Next, the configuration of the sheet manufacturing apparatus will be described. The sheet manufacturing apparatus is based on a technique for forming a raw material (defibrated material) Pu such as a pure pulp sheet or used paper into a new sheet Pr, for example. The sheet manufacturing apparatus includes a supply unit that supplies and supplies materials, a detection unit that detects that a plurality of materials are supplied together, and a material that is supplied from the supply unit. A material defibrating apparatus having a pulverizing part, a defibrating part for defibrating the crushed material, and a forming part for forming a sheet using the material are provided. Hereinafter, the configuration of the sheet manufacturing apparatus will be specifically described.

  FIG. 3 is a schematic diagram showing the configuration of the sheet manufacturing apparatus according to the present embodiment. As shown in FIG. 3, the sheet manufacturing apparatus 1 of the present embodiment includes a material defibrating unit 5, a classifying unit 40, a sorting unit 50, an additive charging unit 60, a dispersing unit 70, and a conveying unit 100. The cutting part 110 and the molding part 200 are provided. And the control part 2 which controls these members is provided.

  The material defibrating unit 5 includes a supply unit 10, a detecting unit 9, a crushing unit 20, a defibrating unit 30, and the like. The material defibrating unit 5 is the same as the material defibrating apparatus 5 described above, and thus the description thereof will be omitted, and other configurations will be described.

  The defibrated material defibrated by the defibrating unit 30 of the material defibrating unit 5 is conveyed to the classifying unit 40 via the pipe 202. The defibrating unit 30 has a mechanism in which an air flow is generated by the rotation of the rotary blade, and the fibers defibrated via the pipe 202 are carried to the classifying unit 40 along the air flow. In addition, when using the dry type defibrating part 30 which is not equipped with a wind generation mechanism, what is necessary is just to provide separately the airflow generator which generates an airflow from the crushing part 20 toward the defibrating part 30. FIG. The classifying unit 40 classifies the introduced material by airflow. In this embodiment, the defibrated material as the introduced material is classified into ink particles and fibers. The classification unit 40 can classify the conveyed fibers into ink particles and deinked fibers (deinked defibrated material), for example, by applying a cyclone. Note that other types of airflow classifiers may be used instead of the cyclone. In this case, as an airflow classifier other than the cyclone, for example, an elbow jet or an eddy classifier is used. The airflow classifier generates a swirling airflow, which is separated and classified by the difference in centrifugal force received depending on the size and density of the defibrated material, and the classification point can be adjusted by adjusting the speed and centrifugal force of the airflow. . As a result, the ink particles are divided into relatively small and low density ink particles and fibers larger than the ink particles and high density. Removing ink particles from fibers is called deinking.

  The classifying unit 40 of the present embodiment is a tangential input type cyclone, an introduction port 40 a introduced from the defibrating unit 30, a cylinder part 41 with the introduction port 40 a in the tangential direction, and a cone continuing to the lower part of the cylinder part 41. It is comprised from the part 42, the lower outlet 40b provided in the lower part of the cone part 42, and the upper exhaust port 40c for fine powder discharge | emission provided in the upper center of the cylinder part 41. As shown in FIG. The diameter of the conical portion 42 becomes smaller downward in the vertical direction.

  In the classification process, the airflow on which the defibrated material introduced from the introduction port 40a of the classification unit 40 is changed into a circumferential motion by the cylindrical part 41 and the conical part 42, and is subjected to centrifugal force and classified. Then, the fibers larger than the ink particles and having a high density move to the lower outlet 40b, and the relatively small and low density ink particles are led to the upper exhaust port 40c as fine powder together with air. Then, the short fiber mixture containing a large amount of ink particles is discharged from the upper exhaust port 40 c of the classification unit 40. Then, the short fiber mixture containing a large amount of discharged ink particles is collected in the receiving unit 80 via the pipe 206 connected to the upper exhaust port 40 c of the classifying unit 40. On the other hand, a classified product containing fibers classified through the pipe 203 is conveyed from the lower outlet 40 b of the classifying unit 40 toward the sorting unit 50. Note that a suction part or the like for efficiently sucking the short fiber mixture from the upper exhaust port 40c may be disposed in the upper exhaust port 40c, the pipe 206, or the like of the classification unit 40.

  The sorting unit 50 sorts the classified product including the fibers classified by the classifying unit 40 through a plurality of openings of the drum unit 51. More specifically, the classified product including the fibers classified by the classifying unit 40 is sorted into a passing material that passes through the opening and a residue that does not pass through the opening. The sorting unit 50 according to the present embodiment includes a mechanism for dispersing the classified material in the air by rotational movement. Then, the passing material that has passed through the opening by sorting by the sorting unit 50 is received by the hopper unit 56 and then conveyed to the dispersion unit 70 via the pipe 204. On the other hand, the residue that has not passed through the opening due to the sorting by the sorting unit 50 is returned again to the defibrating unit 30 as a material to be defibrated via the pipe 205 serving as a feed path. Thereby, the residue is reused (reused) without being discarded.

  The passing material that has passed through the opening by sorting by the sorting unit 50 is conveyed to the dispersing unit 70 via the pipe 204. Between the sorting unit 50 and the dispersing unit 70 in the pipe 204, there is an additive feeding unit 60 for adding an additive such as a resin (for example, a fusion resin or a thermosetting resin) to the passing material to be conveyed. Is provided. In addition to the fusion resin, for example, a flame retardant, a whiteness improver, a sheet strength enhancer, a sizing agent, and the like can be added as the additive. These additives are stored in the additive storage unit 61 and are charged from the charging port 62 by a charging mechanism (not shown).

  The dispersion part 70 forms a web using the material containing the passage material containing the fiber thrown in from the piping 204, and resin. The dispersion unit 70 has a mechanism for uniformly dispersing the fibers in the air and a mechanism for depositing the dispersed fibers on the mesh belt 73.

  First, as a mechanism for uniformly dispersing the fibers in the air, the dispersing unit 70 is provided with a forming drum 71 into which the fibers and the resin are charged. The resin (additive) can be uniformly mixed in the passing material (fiber) by rotating the forming drum 71. The forming drum 71 is provided with a screen having a plurality of small holes. Then, the forming drum 71 is rotationally driven to uniformly mix the resin (additive) in the passing material (fiber) and to uniformly disperse the fiber and the fiber-resin mixture that have passed through the small holes in the air. Can do.

  Below the forming drum 71, an endless mesh belt 73 in which a mesh stretched by a stretch roller 72 is formed is disposed. The mesh belt 73 is moved in one direction by rotating at least one of the stretching rollers 72.

  In addition, a suction device 75 as a suction unit that generates an airflow directed vertically downward is provided below the forming drum 71 via a mesh belt 73. The suction device 75 can suck the fibers dispersed in the air onto the mesh belt 73.

  The fibers and the like that have passed through the small hole screen of the forming drum 71 are deposited on the mesh belt 73 by the suction force of the suction device 75. At this time, by moving the mesh belt 73 in one direction, it is possible to form a web W that includes fibers and resin and is deposited in a long shape. By continuously dispersing from the forming drum 71 and moving the mesh belt 73, a continuous belt-like web W is formed. The mesh belt 73 may be made of metal, resin, or non-woven fabric, and may be anything as long as fibers can be deposited and an air stream can pass therethrough. When the mesh hole diameter of the mesh belt 73 is too large, fibers enter between the meshes, resulting in unevenness when the web (sheet) is formed. On the other hand, when the mesh hole diameter is too small, the suction device 75 It is difficult to form a stable airflow. For this reason, it is preferable to adjust the hole diameter of a mesh suitably. The suction device 75 can be configured by forming a sealed box with a window of a desired size opened under the mesh belt 73, and sucking air from other than the window to make the inside of the box have a negative pressure from the outside air. In addition, the web W concerning this embodiment means the structure form of the object containing a fiber and resin. Accordingly, the web W is shown even when the form or the like is changed when the web W is heated, pressurized, cut or transported.

  The web W formed on the mesh belt 73 is transported by the transport unit 100. The conveyance unit 100 according to the present embodiment illustrates a conveyance process of the web W from when the mesh belt 73 is finally put into the stacker 160 as a sheet Pr (web W). Therefore, in addition to the mesh belt 73, various rollers described later function as a part of the transport unit 100. As the transport unit, there may be at least one of a transport belt, a transport roller, and the like. Specifically, first, the web W formed on the mesh belt 73 which is a part of the transport unit 100 is transported according to the transport direction (arrow in the figure) by the rotational movement of the mesh belt 73. In the present embodiment, the dispersion unit 70 and the conveyance unit 100 are part of the forming unit 200 that forms the sheet Pr using the web W.

  A pressure unit is disposed on the downstream side of the dispersion unit 70 in the conveyance direction of the web W. In addition, the pressurization part of this embodiment is the pressurization part 140 which has the roller 141 which pressurizes the web W. FIG. By passing the web W between the mesh belt 73 and the roller 141, the web W can be pressurized. Thereby, the strength of the web W can be improved.

  A roller 120 in front of the cutting unit is disposed on the downstream side of the pressing unit 140 in the conveyance direction of the web W. The front cutting unit roller 120 includes a pair of rollers 121. One of the pair of rollers 121 is a drive control roller, and the other is a driven roller.

  Further, a one-way clutch is used for a drive transmission unit that rotates the front cutting unit roller 120. The one-way clutch has a clutch mechanism that transmits rotational force only in one direction, and is configured to idle in the opposite direction. As a result, when an excessive tension is applied to the web W due to the speed difference between the post-cutting section roller 125 and the pre-cutting section roller 120, the web W is idled on the pre-cutting section roller 120 side, so that the tension on the web W is suppressed. The web W can be prevented from being torn off.

  A cutting unit 110 that cuts the web W in a direction that intersects the transport direction of the web W to be transported is disposed on the downstream side of the front roller 120 in the transport direction of the web W. The cutting unit 110 includes a cutter, and cuts the continuous web W into sheets (sheets) according to a cutting position set to a predetermined length. For the cutting unit 110, for example, a rotary cutter can be applied. Accordingly, the web W can be cut while being conveyed. Accordingly, since the conveyance of the web W is not stopped at the time of cutting, the manufacturing efficiency can be improved. The cutting unit 110 may apply various cutters in addition to the rotary cutter.

  A cutting portion rear roller 125 is disposed downstream of the cutting portion 110 in the web W conveyance direction. The cutting portion rear roller 125 is composed of a pair of rollers 126. One of the pair of rollers 126 is a drive control roller, and the other is a driven roller.

  In the present embodiment, tension can be applied to the web W due to the speed difference between the roller 120 before the cutting unit and the roller 125 after the cutting unit. And it is comprised so that the cutting part 110 may be driven in the state with tension applied to the web W, and the web W may be cut | disconnected.

  A pair of heating and pressing rollers 151 constituting the heating and pressing unit 150 is provided downstream of the cutting unit rear roller 125 in the conveyance direction of the web W. The heating and pressing unit 150 binds (fixes) the fibers contained in the web W through a resin. A heating member such as a heater is provided at the center of the rotating shaft of the heating and pressing roller 151, and the web W being conveyed is heated by passing the web W between the pair of heating and pressing rollers 151. Can be pressurized. The web W is heated and pressed by the pair of heating and pressing rollers 151, so that the resin melts and becomes easily entangled with the fibers, and the fiber interval is shortened and the contact point between the fibers is increased. Thereby, a density increases and the intensity | strength as the web W improves.

  A rear cutting unit 130 that cuts the web W along the conveyance direction of the web W is disposed downstream of the heating and pressurization unit 150 in the conveyance direction of the web W. The rear cutting unit 130 includes a cutter and cuts according to a predetermined cutting position in the conveyance direction of the web W. Thereby, a sheet Pr (web W) having a desired size is formed. Then, the cut sheet Pr (web W) is stacked on the stacker 160 or the like.

  In addition, the sheet | seat concerning the said embodiment mainly says what used the thing containing fibers, such as used paper and a pure pulp, and made it into a sheet form. However, the shape is not limited to that, and may be a board shape or a web shape (or a shape having irregularities). The material may be plant fibers such as cellulose, chemical fibers such as PET (polyethylene terephthalate) and polyester, and animal fibers such as wool and silk. In the present application, the sheet is divided into paper and non-woven fabric. The paper includes a thin sheet form, and includes recording paper for writing and printing, wallpaper, wrapping paper, colored paper, Kent paper, and the like. Nonwoven fabrics are thicker or lower in strength than paper and include nonwoven fabrics, fiber boards, tissue paper, kitchen paper, cleaners, filters, liquid absorbents, sound absorbers, cushioning materials, mats, and the like.

  In the present embodiment, the used paper mainly refers to printed paper. However, if used as a raw material, it is regarded as used paper regardless of whether it is used.

  As mentioned above, according to the said embodiment, the following effects can be acquired.

  If the used paper Pu is supplied in an overlapping manner, the automatic feeding mechanism 12 or the like tends to cause a supply failure, but the overlap of the used paper Pu is detected before the supply. Thereby, supply failure etc. can be prevented. Furthermore, since the waste paper Pu is prevented from being double-fed, the supply amount to the defibrating unit 30 is quantified, and the amount of defibrated material in the defibrating unit 30 can be stabilized. In addition, since waste paper is not supplied to the crushing unit 20 or the defibrating unit 30 with the stapler or clip attached thereto, damage to the crushing unit 20 or the defibrating unit 30 can be prevented.

  The present invention is not limited to the above-described embodiment, and various modifications and improvements can be added to the above-described embodiment. A modification will be described below.

  (Modification 1) In the material defibrating apparatus 5 of the above embodiment, one supply unit 10 is arranged, but the present invention is not limited to this configuration. For example, a plurality of supply units 10 may be provided. Then, in one supply unit 10, when the detection unit 9 detects that a plurality of used paper Pu as materials are supplied together, the used paper Pu is supplied from another supply unit 10. May be. In this case, the detection unit 9 is mounted on each supply unit 10. In this way, when the overlapping of the used paper Pu is detected in one supply unit 10, the driving of the supply unit 10 is stopped, but the used paper Pu can be supplied from the other supply unit 10. The material defibrating apparatus 5 can be continuously driven without stopping, and good production efficiency can be maintained. Moreover, the used paper Pu which overlapped from the supply part 10 stopped during sparseness can be excluded.

  DESCRIPTION OF SYMBOLS 1 ... Sheet manufacturing apparatus, 2 ... Control part, 5 ... Material disentanglement part, 9 ... Detection part, 10 ... Supply part, 11 ... Tray, 12 ... Automatic feed mechanism, 20 ... Roughing part, 21 ... Roughing blade, DESCRIPTION OF SYMBOLS 30 ... Defibration part, 40 ... Classification part, 50 ... Sorting part, 60 ... Additive addition part, 70 ... Dispersion part, 80 ... Receiving part, 100 ... Conveyance part, 110 ... Cutting part, 120 ... Roller before cutting part, 125 ... Roller after cutting part, 130 ... Post-cutting part, 140 ... Preheating and pressing part, 150 ... Heating and pressing part, 160 ... Stacker, 200 ... Molding part.

Claims (7)

A supply section for loading and supplying materials;
A detector for detecting before supplying that the plurality of materials are supplied together;
A crushing unit for crushing the material supplied from the supply unit;
And a defibrating unit for defibrating the roughly crushed material. The material defibrating apparatus according to claim 1,
The detection unit scans the material in a state in which the material is mounted on the supply unit and the material is not supplied. The material defibrating apparatus according to claim 2,
The supply unit supplies the uppermost material among the materials mounted on the supply unit,
The material defibrating apparatus, wherein the detection unit scans the uppermost material. In the material defibrating apparatus according to any one of claims 1 to 3,
A material defibrating apparatus, wherein when the detection unit detects that a plurality of the materials are supplied together, the supply of the material from the supply unit is stopped. In the material defibrating apparatus according to any one of claims 1 to 4,
A plurality of the supply units are provided, and the one supply unit supplies the material from another supply unit when the detection unit detects that a plurality of the materials are supplied together. Material defibrating equipment. A supply unit for loading and supplying a material, a detection unit for detecting that a plurality of the materials are supplied together, and a crushing unit for crushing the material supplied from the supply unit A material defibrating apparatus having a defibrating unit for defibrating the coarsely crushed material,
A sheet manufacturing apparatus comprising: a forming unit that forms a sheet using the material. Loaded with materials,
Before supplying the material, detecting that a plurality of the materials are supplied together;
Crush the supplied material,
A material defibrating method comprising defibrating the coarsely crushed material.

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