JP2020050977A - Fibrillation processing device and sheet manufacturing device - Google Patents

Abstract

To provide a fibrillation processing device and a sheet manufacturing device capable of efficiently discharging a fibrillated product.SOLUTION: A fibrillation processing device uses a fibrillation inner blade 163 provided on a rotor 160 and a fibrillation outer blade 152 provided on a fixing member 150 covering the rotor 160 to fibrillate input raw material MA and derives a fibrillated product from a derivation port 182. In the device, the fixing member 150 comprises a path 123 provided to face the side opposite to the side where the rotor 160 is placed, for communicating with the derivation port 182, from the side where the rotor 160 is placed with respect to the fixing member 150.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a defibrating device and a sheet manufacturing device.

  2. Description of the Related Art Conventionally, there is known a defibration processing apparatus that defibrates a defibrated object such as waste paper by rotating a rotating body.

  For example, Patent Document 1 discloses a defibration processing apparatus including a rotating body having an inner blade on an outer periphery, and an outer blade for covering the outer periphery of the rotating body and defibrating the defibrated material between the inner blade and the rotating body. There is a description about. In the defibrating device of Patent Literature 1, an inlet for the defibrated material is provided on one side in the rotation axis direction of the rotating body, and an outlet for the defibrated material is provided on the other side in the rotation axis direction of the rotating body. . In Patent Literature 1, there is one passage for the defibrated material extending from the inlet to the outlet.

  Further, for example, Patent Literature 2 discloses a fibrillation processing apparatus including a rotating radial rotor and a circular casing body surrounding the radial rotor. In the defibrating device of Patent Literature 2, an inlet for the defibrated material is provided on a side portion of the circular casing body, and an outlet for the defibrated material is provided on a side portion of the circular casing body shifted from the introduction port in a circumferential direction. Provided. In Patent Literature 2, the defibrated material passes through one passage from the inlet to the outlet.

JP-A-2015-074848 JP-A-7-102493

  In Patent Literature 1, the distance from the inlet to the outlet of the defibrillator is long, and the defibrated material defibrated between the outer blade and the inner blade extends along the rotation axis direction intersecting the rotation direction of the rotating body. As a result, since it moves across the rotating body and is discharged, sufficient fibrillation ability can be obtained. However, there has been a problem that it takes a long time to be discharged and it is difficult to improve the defibration efficiency.

  In Patent Literature 2, since the inlet port and the outlet port are configured to be shifted in the circumferential direction, the inlet port and the outlet port may pass through the outlet port, and it takes time to be discharged, and it is difficult to improve the defibration efficiency.

  For this reason, it has been desired to efficiently discharge the defibrated defibrated material.

  In order to solve the above problems, the defibration processing apparatus of the present invention, the raw material to be charged, the defibration inner blade provided on the rotating body and the defibrating outer blade provided on the fixed member covering the rotating body. In the defibration processing device that defibrates and derives the defibrated material that has been defibrated from the outlet, the fixed member has a structure in which the rotating body is arranged from the side where the rotating body is disposed with respect to the fixed member. A path is provided that communicates with the outlet provided toward the side opposite to the side where is disposed.

  In the above invention, an inlet for charging the raw material may be arranged at one end of the rotating body in the rotation axis direction, and the outlet may be arranged at the other end in the rotation axis direction.

  Further, in the above invention, the fixing member may be configured by stacking a plurality of plates having the defibrating outer blades in a direction of a rotation axis of the rotating body.

  Further, in the above invention, the fixing member may be configured as an integrated block having the defibrating outer blades arranged in a plurality in the direction of the rotation axis of the rotating body.

  Further, in the above invention, the defibrated outer blade includes a plurality of blades provided along a rotation direction of the rotator on an inner wall portion covering the rotator, and the fixing member is sandwiched between the plates. A space is formed between the plates on which the spacer members are arranged, and in a region where the plate and the spacer members do not overlap in the direction of the rotation axis of the rotating body. The space may be provided in the fixing member by communicating the space with a recess formed between the blades of the defibrating outer blade of the plate.

  In addition, in the above invention, there is provided a housing that covers and houses the fixing member, and the housing includes a housing wall portion that includes the fixing member and is provided separately from an outer surface of the fixing member. The portion may be provided with the outlet, and the path may communicate with the outlet via a space between an outer surface of the fixing member and the housing wall portion.

  In order to solve the above problems, a sheet manufacturing apparatus of the present invention includes the defibrating device according to any one of claims 1 to 6, and includes at least a defibrated material defibrated by the defibrating device. A portion is deposited and heated to produce a sheet.

  In the above invention, a supply unit that supplies a raw material to an input port of the defibration processing device, a supply drive unit that drives the supply unit, a rotation drive unit that drives a rotating body of the defibration processing device, and the rotation A detection unit that detects a load of a driving unit, and a control unit that controls the supply driving unit to reduce a supply speed of the supply unit when the load detected by the detection unit exceeds a predetermined threshold. May be provided.

  In the above invention, a supply unit that supplies a raw material to an input port of the defibration processing device, a supply drive unit that drives the supply unit, a rotation drive unit that drives a rotating body of the defibration processing device, and the rotation A detection unit that detects a load of a driving unit, and a control unit that controls the supply driving unit and increases a supply speed of the supply unit when the load detected by the detection unit is lower than a predetermined threshold. May be provided.

FIG. 2 is a schematic diagram illustrating a configuration of a sheet manufacturing apparatus. FIG. 2 is a perspective view of a defibrating unit (defibrating device). The sectional view on the AA line of FIG. FIG. 3 is a sectional view taken along line BB of FIG. 2. FIG. 4 is a sectional view taken along line CC of FIG. 3. The perspective view of a fixing member. The top view of a fixing plate. The top view of a ring plate. The figure which shows the behavior of a defibrated material. FIG. 3 is a block diagram of a control unit of the sheet manufacturing apparatus. The perspective view of the fixing member of a 2nd embodiment of the present invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The embodiments described below do not limit the content of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential components of the invention.

[1. First Embodiment]
[1-1. Overall Configuration of Sheet Manufacturing Apparatus]
FIG. 1 is a schematic diagram illustrating a configuration of the sheet manufacturing apparatus 100.
The sheet manufacturing apparatus 100 executes a regeneration process for converting the raw material MA containing fibers into fibers and regenerating them into a new sheet S. The sheet manufacturing apparatus 100 is capable of manufacturing a plurality of types of sheets S. For example, by mixing an additive with the raw material MA, it is possible to adjust the bonding strength and whiteness of the sheet S and adjust the color, Functions such as fragrance and flame retardancy can also be added. The sheet manufacturing apparatus 100 can adjust the density, thickness, size, and shape of the sheet S. Typical examples of the sheet S include sheet-shaped products such as A4 or A3 fixed size printing paper, floor cleaning sheets and other cleaning sheets, oil stain sheets and toilet cleaning sheets, and paper plates. Shape and the like.

  The sheet manufacturing apparatus 100 includes a storage / feed unit 10, 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 stacking unit 60, and a second web forming unit 70. , A transport unit 79, a sheet forming unit 80, and a cutting unit 90. The crushing unit 12 corresponds to the supply unit of the present invention. The defibrating unit 20 corresponds to the defibrating device of the present invention.

  The crushing unit 12, the defibrating unit 20, the sorting unit 40, and the first web forming unit 45 constitute a defibrating processing unit 101 for refining the raw material MA and obtaining the material of the sheet S. The rotating body 49, the mixing unit 50, the stacking unit 60, the second web forming unit 70, the sheet forming unit 80, and the cutting unit 90 process the material obtained in the defibrating unit 101 to manufacture the sheet S. The manufacturing unit 102 is configured.

  The storage and supply unit 10 is an automatic charging device that stores the raw material MA and continuously inputs the raw material MA to the crushing unit 12. The raw material MA may be a material containing fibers, and is, for example, waste paper, waste paper, or pulp sheet.

  The crushing unit 12 includes a crushing blade 14 that cuts the raw material MA supplied by the storage and supply unit 10, and cuts the raw material MA in the air by the crushing blade 14 into small pieces of several cm square. The shape and size of the strip are arbitrary. For the crushing unit 12, for example, a shredder can be used. The raw material MA cut in the crushing unit 12 is collected by the hopper 9 and transported to the defibrating unit 20 via the pipe 2.

  The defibrating unit 20 defibrate the crushed pieces cut by the crushing unit 12. The defibration is a process of unraveling the raw material MA in a state where a plurality of fibers are bound into one or a small number of fibers. The raw material MA can also be called a defibrated material. By defibrating the raw material MA by the defibrating unit 20, an effect of separating substances such as resin particles, ink, toner, and a bleeding inhibitor attached to the raw material MA from fibers can be expected. What passed through the defibrating unit 20 is called a defibrated material. In addition to defibrated defibrated fibers, the defibrated material includes resin particles separated from the fibers when the fibers are defibrated, ink, toner, and other coloring agents, bleeding prevention materials, paper strength enhancers, and the like. It may contain additives. The resin particles contained in the defibrated material are resins mixed to bind a plurality of fibers during the production of the raw material MA. The shape of the fiber contained in the defibrated material is a string shape, that is, a string shape, or a flat string, that is, a ribbon shape. The fibers contained in the defibrated material may exist in an independent state without being entangled with other fibers. Alternatively, it may exist in a state in which it is entangled with another defibrated defibrated material to form a lump and form a so-called "dama".

  The defibrating unit 20 performs defibration in a dry manner. The dry process refers to performing a process such as defibration in the air, such as the air or the air, instead of in a liquid. The defibrating unit 20 can be configured using, for example, a defibrating machine such as an impeller mill. Specifically, although not shown, the defibrating unit 20 includes a rotating rotor and a liner located on the outer periphery of the rotor, and defibrate the crushed pieces by sandwiching the crushed pieces between the rotor and the liner.

  The crushed pieces are conveyed from the crushing unit 12 to the defibrating unit 20 by airflow. The air flow may be generated by the defibrating unit 20, or a blower (not shown) may be provided upstream or downstream of the defibrating unit 20 in the conveying direction of the crushed pieces or the defibrated material to generate the air flow. May be. The defibrated material is transferred from the defibrating unit 20 to the sorting unit 40 via the pipe 3 by an air current. The airflow that conveys the defibrated material to the sorting unit 40 may be generated by the defibration unit 20 or may use the airflow of the above-described blower.

  The sorting unit 40 sorts components contained in the defibrated material defibrated by the defibrating unit 20 according to the fiber size. The fiber size mainly refers to the length of the fiber. The sorting section 40 has a drum section 41 and a housing section 43 that houses the drum section 41. The drum unit 41 uses, for example, a sieve. Specifically, the drum unit 41 includes a net, a filter, a screen, and the like, which have openings and function as a sieve. More specifically, the drum portion 41 has a cylindrical shape that is driven to rotate by a motor, and at least a part of the peripheral surface forms a net. The net of the drum portion 41 is made of a metal net, an expanded metal obtained by extending a cut metal plate, a punching metal, or the like. The defibrated material introduced into the inside of the drum portion 41 from the introduction port 42 is separated into a passing material that passes through the opening of the drum portion 41 and a residue that does not pass through the opening by rotation of the drum portion 41. The passing material that has passed through the opening contains fibers or particles smaller than the opening, and this is used as the first sorted product. The residue contains fibers larger than the opening, unfibrillated fragments and lumps, and is referred to as a second sort. The first sorting object descends inside the housing part 43 toward the first web forming part 45. The second sorted product is conveyed to the defibrating unit 20 via the pipe 8 from the outlet 44 communicating with the inside of the drum unit 41.

  The sheet manufacturing apparatus 100 may include a classifier that sorts and separates the first sorted material and the second sorted material, instead of the sorting unit 40. The classifier is, for example, a cyclone classifier, an elbow jet classifier, or an eddy classifier. These classifiers may be configured to separate smaller or less dense components among the components contained in the first sorted product. For example, it is possible to adopt a configuration in which the resin particles, coloring agents, and additives separated from the fibers in the defibrating unit 20 from the first sorted material are separated by a classifier and removed. In this case, the first sorted product can be conveyed to the first web forming unit 45 and the mixing unit 50 in a state where fine particles such as resin particles, coloring agents, and additives are removed.

  The first web forming unit 45 includes a mesh belt 46, a stretching roller 47, and a suction unit 48. The mesh belt 46 is an endless metal belt, and is stretched over a plurality of tension rollers 47. The mesh belt 46 orbits a track formed by the tension rollers 47. Part of the track of the mesh belt 46 is flat below the drum portion 41, and the mesh belt 46 forms a flat surface. The suction unit 48 corresponds to a suction mechanism.

  Many openings are formed in the mesh belt 46. Of the first sorted material descending from the drum portion 41 located above the mesh belt 46, components larger than the openings of the mesh belt 46 accumulate on the mesh belt 46. In addition, components of the first sorted material smaller than the opening of the mesh belt 46 pass through the opening.

  The suction unit 48 includes a blower (not shown), and sucks air from the side opposite to the drum unit 41 with respect to the mesh belt 46. The components passing through the openings of the mesh belt 46 are sucked by the suction unit 48. The air current sucked by the suction unit 48 has an effect of accumulating the first sorted material descending from the drum unit 41 to the mesh belt 46 to promote the accumulation.

  The components deposited on the mesh belt 46 have a web shape, and constitute the first web W1. That is, the first web forming unit 45 forms the first web W1 from the first sorted product sorted by the sorting unit 40. 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 first web W1 is mainly composed of fibers larger than the openings of the mesh belt 46 among the components contained in the first sorted product, and is formed in a soft and swollen state with a large amount of air. The first web W1 is transported to the rotating body 49 as the mesh belt 46 moves.

  The rotating body 49 includes a base 49a connected to a driving unit (not shown) such as a motor, and a protrusion 49b protruding from the base 49a. When the base 49a rotates in the direction D, the protrusion 49b connects the base 49a. Rotate as center. The protrusion 49b has, for example, a plate shape. In the example of FIG. 1, four protrusions 49b are provided at equal intervals on the base 49a.

  The rotating body 49 is located at the end of the flat portion of the track of the mesh belt 46. Since the trajectory of the mesh belt 46 is bent downward at this end, the mesh belt 46 bends and moves downward. Therefore, the first web W1 conveyed by the mesh belt 46 projects from the mesh belt 46 and comes into contact with the rotating body 49. The first web W1 is disentangled by the projection 49b colliding with the first web W1, and becomes a lump of small fibers. This lump is conveyed to the mixing section 50 through the pipe 7 located below the rotating body 49. As described above, the first web W <b> 1 has a soft structure formed by depositing the fibers on the mesh belt 46, and thus is easily divided when the first web W <b> 1 collides with the rotating body 49.

  The position of the rotating body 49 is a position where the protrusion 49b can contact the first web W1, and is provided at a position where the protrusion 49b does not contact the mesh belt 46. The distance between the protrusion 49b and the mesh belt 46 at the closest position is preferably, for example, 0.05 mm or more and 0.5 mm or less.

  The mixing section 50 mixes the first sorted product and the additive. The mixing section 50 includes an additive supply section 52 that supplies an additive, a pipe 54 that conveys the first sorted substance and the additive, and a mixing blower 56.

  An additive cartridge 52a for accumulating additives is set in the additive supply unit 52. The additive cartridge 52a may be detachable from the additive supply unit 52. The additive supply unit 52 includes an additive removal unit 52b that removes an additive from the additive cartridge 52a, and an additive introduction unit 52c that discharges the additive removed by the additive removal unit 52b to a pipe 54. The additive take-out section 52b includes a feeder (not shown) that feeds an additive composed of fine powder or fine particles inside the additive cartridge 52a, and takes out the additive from a part or all of the additive cartridge 52a. The additive taken out by the additive take-out part 52b is sent to the additive feed part 52c. The additive introduction part 52c stores the additive taken out by the additive removal part 52b. The additive introduction part 52c includes a shutter (not shown) that can be opened and closed at a connection part with the pipe 54, and the additive taken out by the additive removal part 52b is sent to the pipe 54 by opening the shutter.

  The additive supplied from the additive supply unit 52 includes a resin for binding a plurality of fibers, that is, a binder. The resin contained in the additive is melted when passing through the sheet forming section 80 and binds a plurality of fibers. This resin is a thermoplastic resin or a thermosetting resin, for example, AS resin, ABS resin, polypropylene, polyethylene, polyvinyl chloride, polystyrene, acrylic resin, polyester resin, and polyethylene terephthalate. Other examples of the resin include polyphenylene ether, polybutylene terephthalate, nylon, polyamide, polycarbonate, polyacetal, polyphenylene sulfide, and polyether ether ketone. These resins may be used alone or in a suitable mixture.

  The additive supplied from the additive supply unit 52 may include components other than the resin that binds the fibers. For example, depending on the type of the sheet S to be produced, a coloring agent for coloring fibers, an aggregation inhibitor for suppressing fiber aggregation and resin aggregation, a flame retardant for making fibers and the like difficult to burn, and the like. May be included. Further, the additive may be in the form of a fiber or a powder.

  The mixing blower 56 generates an airflow in the pipe 54 connecting the pipe 7 and the deposition unit 60. Further, the first sorted material conveyed from the pipe 7 to the pipe 54 and the additive supplied to the pipe 54 by the additive supply unit 52 are mixed when passing through the mixing blower 56. The mixing blower 56 can be configured to include, for example, a motor (not shown), blades (not shown) driven and rotated by the motor, and a case (not shown) that accommodates the blades. May be adopted. Further, the mixing blower 56 may include a mixer that mixes the first selection material and the additive, in addition to the blade that generates the airflow. The mixture mixed in the mixing section 50 is conveyed to the deposition section 60 by the airflow generated by the mixing blower 56 and introduced into the inlet 62 of the deposition section 60.

  The deposition unit 60 loosens the fibers of the mixture and lowers the fibers in the second web forming unit 70 while dispersing the fibers in the air. When the additive supplied from the additive supply unit 52 is in the form of fibers, these fibers are also loosened in the deposition unit 60 and descend to the second web forming unit 70.

  The stacking unit 60 includes a drum unit 61 and a housing unit 63 that houses the drum unit 61. The drum unit 61 is, for example, a cylindrical structure configured similarly to the drum unit 41, and rotates by the power of a motor (not shown) similarly to the drum unit 41, and functions as a sieve. The drum part 61 has an opening, and lowers the mixture that has been loosened by the rotation of the drum part 61 from the opening.

  The second web forming unit 70 is disposed below the drum unit 61. The second web forming unit 70 includes, for example, a mesh belt 72, a stretching roller 74, and a suction mechanism 76.

The mesh belt 72 is formed of an endless metal belt similar to the mesh belt 46, and is stretched over a plurality of tension rollers 74. The mesh belt 72 revolves around a track formed by the tension rollers 74. Part of the track of the mesh belt 72 is flat below the drum portion 61, and the mesh belt 72 forms a flat surface. Further, a large number of openings are formed in the mesh belt 72.
Of the mixture descending from the drum portion 61 located above the mesh belt 72, components larger than the openings of the mesh belt 72 accumulate on the mesh belt 72. Further, components of the mixture smaller than the openings of the mesh belt 72 pass through the openings.

  The suction mechanism 76 includes a blower (not shown), and sucks air from the side opposite to the drum 61 with respect to the mesh belt 72. The component that has passed through the opening of the mesh belt 72 is sucked by the suction mechanism 76. The airflow sucked by the suction mechanism 76 has an effect of attracting the mixture descending from the drum portion 61 to the mesh belt 72 and promoting the accumulation. In addition, the airflow of the suction mechanism 76 forms a downflow in the path where the mixture falls from the drum portion 61, and an effect of preventing fibers from becoming entangled during the fall can be expected. The components deposited on the mesh belt 72 have a web shape, and constitute the second web W2.

  In the transport path of the mesh belt 72, a humidity control unit 78 is provided downstream of the stacking unit 60. The humidity control unit 78 is a mist humidifier that supplies water to the mesh belt 72 in the form of a mist. The humidity control unit 78 includes, for example, a tank that stores water and an ultrasonic vibrator that makes water mist. Since the water content of the second web W2 is adjusted by the mist supplied by the humidity control unit 78, an effect of suppressing the adsorption of the fibers to the mesh belt 72 due to the static electricity can be expected.

  The second web W2 is peeled off from the mesh belt 72 by the transport unit 79 and is transported to the sheet forming unit 80. The transport unit 79 includes, for example, a mesh belt 79a, a roller 79b, and a suction mechanism 79c. The suction mechanism 79c includes a blower (not shown), and generates an upward airflow through the mesh belt 79a by the suction force of the blower. Due to this airflow, the second web W2 separates from the mesh belt 72 and is attracted to the mesh belt 79a. The mesh belt 79a is moved by the rotation of the roller 79b, and conveys the second web W2 to the sheet forming unit 80.

  The mesh belt 79a, like the mesh belt 46 and the mesh belt 72, can be constituted by an endless metal belt having an opening.

  The sheet forming unit 80 applies heat to the second web W2 to bind the fibers derived from the first sorted material included in the second web W2 with the resin included in the additive.

  The sheet forming unit 80 includes a pressing unit 82 for pressing the second web W2, and a heating unit 84 for heating the second web W2 pressed by the pressing unit 82. The pressing unit 82 includes a pair of calender rollers 85. The pressurizing section 82 is connected to a press mechanism (not shown) that applies nip pressure to the calendar rollers 85 and 85 by hydraulic pressure, and a driving section (not shown) such as a motor that rotates the calendar rollers 85 and 85 toward the heating section 84. Is done. The pressing unit 82 presses the second web W2 with calendar rollers 85, 85 at a predetermined nip pressure, and conveys the second web W2 toward the heating unit 84. The heating unit 84 includes a pair of heating rollers 86, 86. The heating unit 84 includes a heater (not shown) that heats the peripheral surface of the heating roller 86 to a predetermined temperature, and a driving unit (not shown) that rotates the heating rollers 86 and 86 toward the cutting unit 90. The heating unit 84 applies heat across the second web W2 densified by the pressing unit 82 and conveys it to the cutting unit 90. The second web W2 is heated to a temperature higher than the glass transition point of the resin contained in the second web W2 in the heating unit 84, and becomes a sheet S.

  The cutting unit 90 cuts the sheet S formed by the sheet forming unit 80. 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 indicated by a reference symbol F in the drawing, and a second cutting unit that cuts the sheet S in a direction parallel to the conveyance direction F. 94. The cutting section 90 cuts the length and width of the sheet S into a predetermined size to form a single-sheet sheet S. The sheet S cut by the cutting unit 90 is stored in the discharge unit 96. The discharge unit 96 includes a tray and a stacker for storing manufactured sheets, and the sheet S discharged to the tray can be taken out and used by a user.

  Each unit of the sheet manufacturing apparatus 100 constitutes a defibrating unit 101 and a manufacturing unit 102. The defibrating unit 101 includes at least the defibrating unit 20 and may include the sorting unit 40 and the first web forming unit 45. The defibration processing unit 101 manufactures a defibrated material from the raw material MA or a first web W1 in which the defibrated material is formed into a web. The product of the defibrating unit 101 can be not only transported to the mixing unit 50 via the rotating body 49 but also taken out of the sheet manufacturing apparatus 100 and stored without being transferred to the rotating body 49. Further, the product may be enclosed in a predetermined package so that the product can be transported and traded.

  The manufacturing unit 102 is a functional unit that reproduces the product manufactured by the defibration processing unit 101 into a sheet S, and corresponds to a processing unit. The manufacturing unit 102 includes the mixing unit 50, the deposition unit 60, the second web forming unit 70, the transport unit 79, the sheet forming unit 80, and the cutting unit 90, and may include the rotating body 49. Further, an additive supply section 52 may be included.

  In the sheet manufacturing apparatus 100, the defibrating unit 101 and the manufacturing unit 102 may be configured integrally or may be configured separately. In this case, the defibrating unit 101 corresponds to the fiber material recycling apparatus of the present invention. The production unit 102 corresponds to a sheet forming unit that forms the defibrated material into a sheet shape. In addition, it can be said that any of these corresponds to a processed portion.

[1-2. Configuration of the defibrating unit]
Next, the configuration of the defibrating unit 20 as the defibrating device of the present invention will be described.
FIG. 2 is a perspective view of the defibrating unit 20. FIG. 3 is a sectional view taken along line AA of FIG. FIG. 4 is a sectional view taken along line BB of FIG.

  As shown in FIGS. 2 to 4, the defibrating unit 20 according to the present embodiment is arranged with a gap G between the rotating body 160 and the rotating body 160 that are driven to rotate. And a cylindrical fixing member 150 to be formed. In addition, the defibrating unit 20 includes a housing 180 that covers and accommodates the rotating body 160 and the fixing member 150, and covers 190 and 200 disposed at both ends of the housing 180. In the present embodiment, the configuration in which the fixing member 150 is cylindrical is described, but the fixing member 150 does not have to be cylindrical. For example, the fixing member 150 may have a prismatic configuration. That is, the fixing member 150 may be configured so as to be separated from the rotating body 160 in a direction away from the rotation center of the rotating body 160 and cover the rotating body 160.

  The housing 180 of the defibrating unit 20 has a rotating body shape extending along the rotating shaft 171 of the rotating body 160. In the present embodiment, a configuration in which the housing 180 and the like extend in the vertical direction in accordance with the rotation shaft 171 extending in the vertical direction will be described. However, the rotating shaft 171 of the rotating body 160 may be configured to extend in the horizontal direction, and accordingly, the housing 180 may be configured to have an axial center extending in the horizontal direction. In the following description, the direction in which the rotation shaft 171 extends, that is, the direction of the axis center of the housing 180 and the like, is referred to as the axial direction. The radial center of the rotating body such as the rotating body 160 and the fixed member 150 is referred to as the axial center 110.

  The upstream cover 190 is supported by the one end opening 180a of the housing 180. The upstream cover 190 includes an annular lid 190a. The lid 190a has the same outer diameter as the outer diameter of the housing 180. An annular insertion portion 190b projecting downward is formed below the lid 190a. The outer diameter of the insertion portion 190b corresponds to the inner diameter of the housing 180. The upstream cover 190 is arranged with the insertion portion 190b inserted into the one end opening 180a of the housing 180.

  At the radial center of the upstream cover 190, a cylindrical inlet pipe portion 190c extending in the vertical direction is formed. The inlet pipe 190c communicates in the up-down direction, and communicates the inside and the outside of the upstream cover 190 and the housing 180. An inlet 194 that opens upward is provided above the inlet pipe 190c. The pipe 2 of the hopper 9 shown in FIG. The raw material MA is supplied from the pipe 2 into the defibrating unit 20 through the input port 194. The raw material MA in the defibrating unit 20 includes both the raw material MA supplied from the storage and supply unit 10 and the above-described second sorted product re-sent from the separating unit 40 to the defibrating unit 20. Used in

  As shown in FIG. 2, a bearing support portion 191 is formed at a lower portion inside the inlet pipe portion 190c. The bearing support 191 includes a circular support 191a and four bases 191b extending in a cross direction from the support 191a. A bearing 192 that rotatably supports the rotating body 160 is supported by the support portion 191a. A space is formed between the bases 191b and communicates with each other in the vertical direction, so that the raw material MA input from the input port 194 can move into the housing 180.

  The base cover 200 is supported by the other end opening 180b of the housing 180. The base cover 200 includes an annular main body 200a. The main body 200a has the same outer diameter as the outer diameter of the housing 180. An annular insertion portion 200b projecting upward is formed in the main body 200a. The outer diameter of the insertion portion 200b corresponds to the inner diameter of the housing 180. The base cover 200 is disposed with the insertion portion 200b inserted into the other end opening 180b of the housing 180. A bearing arrangement portion 200c that is recessed upward is formed at a radially central portion of the base cover 200. The bearing 201 that supports the rotating body 160 is arranged in the bearing arrangement part 200c.

FIG. 5 is a sectional view taken along line CC of FIG. In FIG. 5, small dots are attached to the ring plate 155 so that the position of the ring plate 155 can be easily understood.
The rotating body 160 is disposed inside the housing 180. The rotating body 160 includes a rotating shaft 171 extending in the vertical direction, and a rotating body 161 fixed and supported by the rotating shaft 171. The rotator main body 161 is an integral block. The cross-sectional shape of the rotating body 161 is a cross shape. The rotating body 161 includes a base 162 having a hole 162a through which the rotating shaft 171 is inserted, and a defibrating inner blade 163 protruding radially from the base 162. For example, the rotating body 161 can be manufactured by casting. The rotating shaft 171 and the rotating body 161 are fitted via a machine key 164. The rotating shaft 171 and the rotating body 161 can be integrally rotated without shifting in the circumferential direction.

  As shown in FIGS. 3 and 4, a bolt 172 is inserted into one end of the rotating shaft 171 and is fixed to the inner race 192 a of the bearing 192. The outer race 192b of the bearing 192 is supported by the support 191a of the bearing support 191. Thus, the rotating shaft 171 is rotatably supported by the bearing 192. A bolt 173 is inserted through the other end of the rotating shaft 171, and is fixed to the inner race 201 a of the bearing 201. An outer race 201b of the bearing 201 is fixed to a thick cylindrical stay 202. The stay 202 is arranged on the bearing arrangement part 200c, and is fixed to the base cover 200 with bolts 204.

  The rotating shaft 171 is driven to rotate by a driving mechanism (not shown). In the present embodiment, the drive mechanism is configured by a chain and a sprocket, and power is transmitted from a rotation drive unit 431 described later, and the rotation shaft 171 is driven via the chain and the sprocket (not shown). As the driving mechanism, for example, a mechanism for directly rotating the rotating shaft 171 by a motor or a mechanism for rotating the rotating shaft 171 via a power transmission device such as a belt and a pulley or a gear, instead of a chain and a sprocket. And so on.

FIG. 6 is a perspective view of the fixing member 150. In FIG. 6, small dots are attached to the outer surfaces of the fixed plate 151 and the ring plate 155.
The fixing member 150 is disposed inside the housing 180. The fixed member 150 is a cylindrical member that extends along the rotation axis 171 of the rotating body 160 and covers the periphery of the rotating body 160.

FIG. 7 is a plan view of the fixing plate 151. FIG. FIG. 8 is a plan view of the ring plate 155. FIG.
As shown in FIGS. 6 to 8, the fixing member 150 is formed in a cylindrical shape by stacking a plurality of fixing plates 151 and a ring plate 155. As shown in FIG. 6, in the present embodiment, each time a plurality of fixing plates 151 are stacked, one ring plate 155 is stacked, and this is repeated a plurality of times to configure the fixing member 150.

  As shown in FIG. 7, the fixing plate 151 is a plate-shaped member, and has a main body 151b having an annular shape in plan view. A fibrillation outer blade 152 that protrudes in a mountain shape in a direction toward the axial center 110 is formed on an inner peripheral portion of the main body 151b of the fixed plate 151. The defibrating outer blades 152 are formed at equal intervals in the circumferential direction. The defibrating outer blade 152 has an uneven shape in the circumferential direction. In the fixed plate 151, the inner diameter, which is the distance from the shaft center 110 to the top 152a of each defibrating outer blade 152, is formed as R1. The inner diameter, which is the distance from the shaft center 110 to the valley 152b between the defibrating outer blades 152, is formed as R2. The valley 152b corresponds to a recess between the blades of the defibrating outer blade 152.

  The fixing plate 151 is provided with a pair of fixing holes 151a penetrating in the thickness direction. As shown in FIG. 6, bolts 157 are inserted through the fixing holes 151a, and positioning between the fixing plates 151 in the circumferential direction is performed. In the present embodiment, the positions of the blades of the defibrated outer blades 152 to be stacked coincide with each other, and the tops 152a and the valleys 152b extend in a streak shape in the axial direction.

  When the rotating body 160 rotates inside the fixing member 150, the defibrating outer blade 152 of the fixing member 150 enters the gap G between the inner peripheral surface of the fixing member 150 and the defibrating inner blade 163 of the rotating body 161. It has a function to generate an airflow that unravels the defibrated material. The irregular shape of the defibrating outer blade 152 is arbitrary as long as the rotating body 160 rotates within the fixed member 150, and can generate an airflow that defibrate the defibrated object that has entered the gap G. For example, the defibrating outer blade 152 may have a protruding trapezoidal shape, and a flat portion may be formed at the tip thereof. In addition, it is more preferable that the defibrating outer blade 152 does not have a sharp shape. For example, when the defibrating outer blade 152 has a shape that is thinner and sharper at the tip thereof, when the defibrated object collides with the defibrating outer blade 152 by rotation of the rotating body 160, the defibrating outer blade 152 is disintegrated. This is because there is a possibility that the fibers may be cut into the fiber and cut excessively.

  As shown in FIG. 8, the ring plate 155 is a plate-shaped member, and has an annular main body 155a in plan view. The ring plate 155 corresponds to a spacer member. The inner diameter R11 of the ring plate 155 is formed to be slightly larger than the inner diameter R1 of the fixed plate 151 up to the top 152a of the defibrating outer blade 152. The outer diameter R12 of the ring plate 155 is formed smaller than the inner peripheral surface of the fixed plate 151, that is, the inner diameter R2 up to the valley 152b. A pair of fixing pieces 156 are formed on the outer peripheral portion of the ring plate 155 with the shaft center 110 interposed therebetween. The fixing piece 156 is provided with a fixing hole 156a penetrating in the thickness direction. That is, the ring plate 155 is provided with a pair of fixing holes 156a. Bolts 157 for fixing the fixing plate 151 are inserted into the fixing holes 156a, and the ring plate 155 is positioned.

  The fixing member 150 is configured by stacking the plurality of fixing plates 151 and the ring plate 155. The main body 151b of the stacked fixing plate 151 and the main body 155a of the ring plate 155 form an inner wall 150a of the fixing member 150. The defibrating outer blade 152 is provided on the inner wall 150a. The bolt 157 of the fixing member 150 is fixed to the insertion portion 200b of the base cover 200 as shown in FIGS.

  The thicknesses of the fixed plate 151 and the ring plate 155 are not particularly limited, but it is preferable that the fixed plate 151 and the ring plate 155 have the same thickness. Further, in the fixing member 150, one ring plate 155 is stacked every time three fixing plates 151 are stacked, but the present invention is not limited to this. The number of the fixed plates 151 and the ring plates 155 to be laminated can be appropriately determined according to the processing capacity of the defibrating unit 20 and the design of the gap G between the rotator 160 and the defibrating inner blade 163 to be described later. The fixed plate 151 and the ring plate 155 can be formed, for example, by stamping a cold-rolled steel plate, a steel strip, or the like with a press.

  As shown in FIGS. 5 and 6, in a portion where a plurality of fixed plates 151 are continuously stacked, the fixed plates 151 are arranged so as to be in contact with each other in the axial direction. On the other hand, in a portion where the ring plate 155 is disposed between the fixed plates 151, the inner diameter R12 of the ring plate 155 is smaller than the outer diameter of the fixed plate 151. The space 210 is formed. The space 210 extends to the outer peripheral side of the fixing member 150.

As shown in FIG. 5, since the outer diameter R12 of the ring plate 155 is smaller than the inner diameter R2 of the valley 152b of the defibrated outer blade 152, the space between the blades of the defibrated outer blade 152 is completely closed. do not do. The ring plate 155 opens the valley 152b into the space 210 at the portion that is not closed. The classifying opening 211 is formed by the opening edge shape surrounded by the ring plate 155 and the fibrillation outer blade 152 of the valley 152b. Classifying port 211, the opening area of the classifying port 211 ^is set to 0.25 mm 2 1.0 mm ^2. In the present embodiment, since a plurality of sets of the defibrating outer blade 152 and the ring plate 155 of the fixed plate 151 are provided, a plurality of classifying ports 211 and spaces 210 are provided in the axial direction. The defibrated material defibrated by the defibrating outer blade 152 of the fixing member 150 and the defibrating inner blade 163 of the rotating body 160 is discharged to the space 210 while being classified by a plurality of classifying ports 211 provided in the axial direction. You.

  On the outer peripheral side of the fixing member 150, a housing 180 is arranged. The housing 180 covers the fixing member 150. Because of the space 210, the outer surface 150b of the fixing member 150 and the housing 180 are separated at least in the space 210. A space such as the space 210 is formed between the outer surface 150b of the fixing member 150 and the housing 180. Therefore, the defibrated material classified from the classification port 211 can move in the space 210.

  An opening-shaped outlet 182 communicating with the inside and outside of the housing 180 is formed in the housing wall portion 180c on the side of the housing 180. A concave portion 183 extending in the axial direction is formed on the inner peripheral surface of the housing wall portion 180c of the housing 180 according to the position of the outlet 182 in the circumferential direction. The recess 183 forms a downstream space 212 between the fixing member 150 and the housing 180. The downstream space 212 communicates with each space 210. Therefore, the defibrated material that has flowed into the space 210 can move to the outlet 182 via the downstream space 212.

As shown in FIGS. 3 and 5, an outlet pipe 184 is inserted and connected to the outlet 182. The outlet pipe 184 is connected to the pipe 3 extending to the sorting unit 40 shown in FIG. The outlet pipe 184 leads the defibrated material defibrated by the rotating body 160 from the defibrating unit 20.
The classifying opening 211, the space 210, and the downstream space 212 form a path 213 for leading the defibrated material from the outlet 182. The path 213 is provided in a direction away from the rotating shaft 171 of the rotating body 160 radially outward. The space 210 is a part of the path 213, and the fixing member 150 includes a part of the space 210 of the path 213.

  Here, the inlet 194 is formed at one end of the rotating shaft 171, whereas the outlet 182 is formed at the other end of the rotating shaft 171 than at the center, as shown in FIG. 3. . Therefore, the raw material MA input from the input port 194 can easily move along the axial direction of the rotating shaft 171, and can be easily opened using the whole of the fixing member 150 and the rotating body 160. Since there are a plurality of classifying ports 211 in the axial direction, it is easy to be led to the path 213 sequentially from the defibrated defibrated material.

[1-3. Operation of defibration unit]
Next, the operation of the defibrating unit 20 will be described.
The defibrating unit 20 rotates the rotating body 160 by rotating the rotation shaft 171, and guides the defibrated object to the gap G between the rotating body 160 and the fixed member 150 by an airflow, thereby setting the defibrated object. Can be dry defibrated.

  When the defibrated material is supplied from the input port 194 of the defibrating unit 20, the defibrated material is introduced into the housing 180 via the inlet pipe 190 c of the upstream cover 190. Inside the housing 180, the air is sent to the gap G between the defibrating inner blade 163 of the rotating body 160 and the defibrating outer blade 152 of the fixed member 150, and receives a centrifugal force from the defibrating inner blade 163 and flies. Then, it collides with the defibrating outer blade 152 and is loosened. The defibrated defibrated material is discharged from the classification port 211 to the outside of the fixing member 150. Then, as shown by an arrow A in FIG. 5, it is sent to the outlet 182 through the space 210 of the route 213. The defibrated material sent to the outlet 182 side is sent to an external sorting unit 40 via an outlet pipe 184.

FIG. 9 is a diagram showing the behavior of the defibrated material.
When the defibrated material 220 defibrated between the fixing member 150 and the rotating body 160 is sufficiently defibrated to become the fine defibrated material 221, it is likely to move outward in the radial direction and is separated from the shaft center 110. It easily accumulates in the valley 152b of the defibrated outer blade 152.

  In this embodiment, since the valley 152b has the classification port 211 communicating with the path 213, the defibrated material 221 is easily discharged quickly. Therefore, the defibrated material 221 is suppressed from being excessively defibrated. In addition, since the defibrated material 221 is discharged from the classification port 211 in order, the classification can be performed.

[1-5. Configuration of control system of sheet feeding device]
FIG. 10 is a block diagram of the control unit 230 of the sheet manufacturing apparatus 100.
The sheet manufacturing apparatus 100 includes a control unit 230 that controls each unit of the sheet manufacturing apparatus 100. The control unit 230 includes a processor 231 that executes a program, and a storage unit 232. The processor 231 is an arithmetic processing device including a CPU (Central Processing Unit), a DSP (Digital Signal Processor), a microcomputer, and the like. Further, the processor 231 may be configured by a plurality of hardware, or may be configured by a single processor. Further, the processor 231 may be hardware programmed to realize the functions of each unit described below. That is, the processor 231 may have a configuration in which the control program is mounted as a hardware circuit. In this case, for example, the processor 231 is configured by an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array).
In the following description, a configuration example in which the processor 231 executes a control program to realize various functions of the control unit 230 will be described.

  The storage unit 232 has a storage area for storing a program executed by the processor 231 and data processed by the processor 231. The storage unit 232 stores a control program executed by the processor 231 and setting data including various setting values related to the operation of the sheet manufacturing apparatus 100. The storage unit 232 has a nonvolatile storage area for storing programs and data in a nonvolatile manner. The storage unit 232 may include a volatile storage area, and may constitute a print medium area for temporarily storing a program executed by the processor 231 and data to be processed.

  A supply drive unit 241 that supplies power to the crushing unit 12 is electrically connected to the control unit 230. The supply drive unit 241 is, for example, an electric motor. Here, the crushing blade 14 of the crushing unit 12 includes a driving member 14a and a driven member 14b disposed to face the driving member 14a. The supply driving unit 241 drives the driving member 14a. The driven member 14b rotates with the driving member 14a with the raw material MA interposed therebetween.

  A rotation drive unit 242 that supplies power to the defibrating unit 20 is electrically connected to the control unit 230. The rotation drive unit 242 is, for example, an electric motor. The rotation drive unit 242 drives the rotation shaft 171 of the rotating body 160 via a drive mechanism (not shown).

  The control unit 230 is electrically connected to a detection unit 243 that detects a load on the rotation drive unit 242. The detection unit 243 is, for example, a wattmeter. The detection unit 243 detects the power consumption of the rotation drive unit 242 as a load.

  The control unit 230 stores a preset upper threshold for determining whether the power consumption is excessive. Control unit 230 determines whether or not the power consumption detected by detection unit 243 exceeds the upper threshold. When determining that the power consumption exceeds the upper threshold, the control unit 230 performs control to reduce the rotation speed of the supply driving unit 241. Thereby, the rotation speed of the coarse crushing blade 14 is reduced, and the amount of the raw material MA sent to the defibrating unit 20 can be reduced.

  Further, control unit 230 stores a lower limit threshold value for determining whether the power consumption is appropriate. The lower threshold is set in advance. The control unit 230 determines whether the power consumption detected by the detection unit 243 is lower than a lower threshold. When determining that the power consumption is lower than the lower limit threshold, the control unit 230 performs control to increase the rotation speed of the supply driving unit 241. Thereby, the rotation speed of the crushing blade 14 is increased, and the amount of the raw material MA sent from the crushing blade 14 to the defibrating unit 20 can be increased.

[1-5. Operation of sheet feeding device]
In the sheet manufacturing apparatus 100, the power consumption during rotation of the rotating body 160 of the defibrating unit 20 is detected. When the power consumption is large, the load on the rotating body 160 is large. On the other hand, in the present embodiment, when the power consumption is excessively large, the rotation speed of the coarse crushing blade 14 is reduced, and the raw material MA sent to the defibrating unit 20 can be reduced. Therefore, the load on the defibrating unit 20 can be easily reduced by reducing the amount of the raw material MA supplied to the defibrating unit 20.

  When the power consumption is small, the load on the rotating body 160 may be too small, and the defibrated material is excessively defibrated by the defibrated inner blade 163 and the defibrated outer blade 152, a so-called state. , There is a risk of overfibrillation. If overfibrillated, it is difficult to regenerate the defibrated material as the sheet S, and the raw material MA is wasted. In the present embodiment, when the power consumption is excessively small, the rotation speed of the coarse crushing blade 14 is increased, and the raw material MA sent to the defibrating unit 20 can be increased. Therefore, by increasing the amount of the raw material MA supplied to the defibrating unit 20, the load on the defibrating unit 20 is made appropriate, and it becomes easy to perform a desired defibration.

  As described above, the defibrating unit 20 of the present embodiment provides the raw material MA supplied from the input port 194 to the defibrating inner blade 163 provided on the rotating body 160 and the fixed member 150 covering the rotating body 160. This is a defibration processing device that defibrates with the defibrated outer blade 152 to derive the defibrated material from the outlet 182. In the defibrating unit 20, the fixing member 150 has an outlet provided from the side where the rotating body 160 is arranged to the side opposite to the side where the rotating body 160 is arranged with respect to the fixing member 150. A path 213 communicating with 182 is provided. Therefore, the defibrated defibrated material can be quickly and efficiently discharged by the classification function of the classification opening 211.

  In the present embodiment, the input port 194 opens at one end in the direction of the rotation axis of the rotating body 160, that is, the direction in which the rotation shaft 171 extends, and the outlet 182 opens at the other end in the direction in which the rotation shaft 171 extends. Therefore, the material to be defibrated is easily defibrated while moving from one end side to the other end side of the rotation shaft 171, and defibration can be performed by effectively using a distance corresponding to the length of the rotation shaft 171. .

  In the present embodiment, the fixing member 150 is configured by laminating a plurality of fixing plates 151 having the defibrating outer blades 152 toward the rotation axis 171 of the rotating body 160. Therefore, the defibrating outer blade 152 can be configured by the laminated structure. Further, when the defibrated outer blade 152 is worn or damaged, only the fixed plate 151 in the worn or damaged portion can be replaced.

  Further, in the present embodiment, the defibrated outer blade 152 includes a plurality of blades provided along the rotation direction of the rotating body 160 on the inner wall portion 150a covering the rotating body 160, and the fixing member 150 It has a ring plate 155 sandwiched therebetween. The space 210 is formed between the fixed plates 151 where the ring plates 155 are arranged, and in a region where the fixed plate 151 and the ring plate 155 do not overlap with each other in the direction of the rotation axis 171 of the rotating body 160. Communicates with the valley 152b formed between the blades of the defibrating outer blade 152 of the fixing plate 151, so that the space 210 of the path 213 is provided in the fixing member 150. The path 213 can be formed by the laminated structure of the fixed plate 151 and the ring plate 155.

  In the present embodiment, a housing 180 that covers and accommodates the fixing member 150 is provided. The housing 180 includes a housing wall portion 180c that includes the fixing member 150 and is spaced apart from the outer surface 150b of the fixing member 150. An outlet 182 is provided in the housing wall 180c, and a path 213 is formed by the space between the outer surface 150b of the fixing member 150 and the housing wall 810c. By forming the path 213 between the housing 180 and the fixing member 150, the defibrating unit 20 can be provided compactly.

  The sheet manufacturing apparatus 100 of the present embodiment includes the defibrating unit 20 described above, and manufactures a sheet by depositing and heating at least a part of the defibrated material defibrated by the defibrating unit 20. The defibrated material defibrated in the defibrating unit 20 can be quickly and efficiently discharged by the classifying function of the classifying port 211 by the defibrated defibrated material.

  In the present embodiment, the sheet manufacturing apparatus 100 includes the crushing unit 12 that supplies the raw material MA to the input port 194 of the defibrating unit 20 and the supply driving unit 241 that drives the crushing blade 14 of the crushing unit 12. . In addition, the sheet manufacturing apparatus 100 includes a rotation driving unit 242 that drives the rotating body 160 of the defibrating unit 20 and a detection unit 243 that detects power consumption of the rotation driving unit 242. In addition, a control unit 230 that controls the supply driving unit 241 to reduce the supply speed of the crushing unit 12 when the power consumption detected by the detection unit 243 exceeds the upper limit threshold is provided. Therefore, the load on the defibrating unit 20 can be easily reduced.

  In the present embodiment, the sheet manufacturing apparatus 100 includes the crushing unit 12 that supplies the raw material MA to the input port 194 of the defibrating unit 20 and the supply driving unit 241 that drives the crushing blade 14 of the crushing unit 12. . Further, the sheet manufacturing apparatus 100 includes a rotation driving unit 242 that drives the rotating body 160 of the defibrating unit 20 and a detection unit 243 that detects power consumption of the rotation driving unit 242. In addition, the control unit 230 includes a control unit 230 that controls the supply driving unit 241 to increase the supply speed of the crushing blade 14 of the crushing unit 12 when the power consumption detected by the detection unit 243 is lower than the lower threshold. Therefore, it is possible to suppress over-defibration, which excessively defibrate the defibrated material.

[2. Second Embodiment]
[2-1. Configuration of the defibrating unit]
Next, a second embodiment of the present invention will be described. The same parts as those in the above-described first embodiment are denoted by the same reference numerals, and description thereof is omitted.

FIG. 11 is a perspective view of a fixing member 250 according to the second embodiment of the present invention.
As shown in FIG. 11, in the present embodiment, a fixing member 250 is provided instead of the fixing member 150 of the first embodiment. The fixing member 250 is configured as an integral block. The fixing member 250 can be manufactured, for example, by casting.

  The fixing member 250 is, as it were, a shape constituted by one fixing plate 151 having a large thickness. The fixing member 250 includes a fibrillation outer blade 152 extending in the axial direction. Further, the top 152a and the valley 152b of the defibrated outer blade 152 extend in a streak shape in the axial direction.

In the valley 152b, a through-hole 250c penetrating from the inner wall 250a of the fixing member 250 toward the outer surface 250b is formed. A plurality of through holes 250c are provided in the axial direction along the valleys 152b. The opening area of the through hole 250c ^is set to 0.25 mm 2 1.0 mm ^2.
On the outer surface 250b of the fixing member 250, a slit hole 250d extending along the axial direction is formed. Each through hole 250c communicates with the slit hole 250d. Therefore, the valley 152b of the fixing member 250 of the second embodiment communicates with the outside of the fixing member 250 as in the first embodiment. The through hole 250c corresponds to a classification port.

  Since the fixing member 250 is surrounded by the housing 180, a path 213 is formed between the housing wall portion 180 c of the housing 180 and the fixing member 250 by communicating the through hole 250 c, the slit hole 250 d, the downstream space 212, and the like. Is configured. Also in the second embodiment, as in the first embodiment, the defibrated material defibrated by the fixing member 250 is sequentially led out to the path 213 via the through hole 250c. The slit hole 250d is a part of the path 213, and the fixing member 250 includes a slit hole 250d of a part of the path 213.

[2-2. Operation of defibration unit]
Although the fixing member 250 according to the second embodiment is an integral block, the defibrated material defibrated in the gap G between the fixing member 250 and the rotating body 160 can be led out to the path 213 through the through hole 250c. It is. Therefore, also in the defibrating unit 20 of the second embodiment, when the defibrated material is subjected to the dry defibration process, the defibrated defibrated material is quickly discharged by the classifying function by the through-holes 250c to efficiently discharge. Can be discharged.

  As described above, in the defibrating unit 20 of the second embodiment, the fixing member 250 is an integrated block having a plurality of defibrating outer blades 152 arranged in the direction of the rotation axis 171 of the rotating body 160. Be composed. Therefore, it is not necessary to manufacture and assemble a large number of components such as the fixing plate 151 and the ring plate 155.

[3. Other Embodiments]
Each of the above-described embodiments is merely a specific mode for carrying out the present invention described in the claims, does not limit the present invention, and does not depart from the gist thereof. Can be implemented in various aspects.

  In the above embodiment, the fixing members 150 and 250 and the housing wall portion 180c of the housing 180 may be separated from each other, or the fixing members 150 and 250 and the housing wall portion 180c of the housing 180 may be brought into contact with each other to form, for example, a portion of the space 210. The defibrated material may be moved simply.

  In the above embodiment, the configuration in which the rotating body 160 has the rotating body main body 161 as a block has been described. However, the rotating body 161 may be configured by stacking a plurality of plates.

  In the first embodiment, the configuration in which the ring plate 155 is formed in an annular shape has been described. However, the configuration is not limited to an annular shape, and for example, a configuration including a plurality of protrusions extending radially may be used. That is, the ring plate 155 may have any shape as long as it forms the classifying port 211 and forms a space where the classifying port 211 communicates with the outer surface of the fixing member 150.

  In the second embodiment, the configuration in which the through hole 250c communicates with the slit hole 250d has been described. However, the configuration may be such that the slit hole 250d is omitted and the through hole 250c extends to the outer surface of the fixing member 250.

  Further, the sheet manufacturing apparatus 100 is not limited to the sheet S, and may be configured to manufacture a board-shaped or web-shaped product composed of a hard sheet or a laminated sheet. The product is not limited to paper but may be a nonwoven fabric. The properties of the sheet S are not particularly limited, and may be paper usable as recording paper (for example, so-called PPC paper) for writing or printing, or may be wallpaper, wrapping paper, colored paper, drawing paper, Kent paper, or the like. There may be. When the sheet S is a nonwoven fabric, it may be a general nonwoven fabric, a fiber board, tissue paper, kitchen paper, a cleaner, a filter, a liquid absorbing material, a sound absorbing material, a cushioning material, a mat, and the like.

  The sheet manufacturing apparatus 100 of the above embodiment has been described as a dry sheet manufacturing apparatus 100 that obtains a material by defibrating a raw material in the air and manufactures a sheet S using the material and the resin. The application target of the present invention is not limited to this. The present invention is also applicable to a so-called wet sheet manufacturing apparatus in which a raw material containing fibers is dissolved or suspended in a solvent such as water and the raw material is processed into a sheet. Further, the present invention is also applicable to an electrostatic sheet manufacturing apparatus in which a material containing fibers defibrated in the air is adsorbed on the surface of a drum by static electricity or the like, and the raw material adsorbed on the drum is processed into a sheet.

12: supply unit (crushing unit), 20: defibration processing device (defibration unit), 100: sheet manufacturing device, 150: fixing member, 150a: inner wall portion, 150b: outer surface, 151: fixing plate (plate) , 151b: main body, 152: defibrated outer blade, 152b: valley (recess), 155: ring plate (spacer member), 155a: main body, 160: rotating body, 161: rotating body, 162: base, 163: Defibrillation inner blade, 171: Rotating shaft, 172 ... Bolt, 173 ... Bolt, 180 ... Housing, 180a ... One end opening, 180b ... Other end opening, 180c ... Housing wall part, 182 ... Outlet, 183 ... Concave part, 184 outlet pipe, 190 upstream cover, 190a cover part, 190b insertion part, 190c inlet pipe part, 191a support part, 192 bearing, 192a inner race 192b: outer race, 194: inlet, 200: base cover, 200a: main body, 200b: insertion part, 200c: bearing arrangement part, 201: bearing, 201a: inner race, 201b: outer race, 202: stay, 204 ... bolt, 210 ... space (space), 211 ... classifier, 212 ... downstream space, 213 ... path.

Claims (9)

The raw material to be charged is defibrated by the defibration inner blade provided on the rotating body and the defibrating outer blade provided on the fixing member covering the rotating body, and the defibrated material defibrated from the outlet is obtained. In the defibration processing device to be derived,
The fixing member is provided with a path communicating with the outlet provided from the side on which the rotating body is disposed to a side opposite to the side on which the rotating body is disposed, with respect to the fixing member. Defibrillation processing equipment.   The defibration process according to claim 1, wherein an input port into which the raw material is input is disposed at one end side in a rotation axis direction of the rotating body, and the outlet port is disposed at the other end side in the rotation axis direction. apparatus.   The defibrating device according to claim 1, wherein the fixing member is configured by stacking a plurality of plates having the defibrating outer blades in a direction of a rotation axis of the rotating body.   The defibrating device according to claim 1, wherein the fixing member is configured as an integrated block having the defibrating outer blades arranged in a plurality in the direction of the rotation axis of the rotating body. The defibration outer blade includes a plurality of blades provided along a rotation direction of the rotator on an inner wall portion covering the rotator,
The fixing member has a spacer member sandwiched between the plates,
Between the plates on which the spacer members are arranged, a space is formed in a region where the plate and the spacer members do not overlap with each other in the direction of the rotation axis of the rotating body, and the space is the space of the plate. The defibration processing apparatus according to claim 3, wherein the path is provided in the fixing member by communicating with a recess formed between the blades of the defibration outer blade. A housing that covers and houses the fixing member,
The housing includes a housing wall that includes the fixing member and is provided separately from an outer surface of the fixing member, and the outlet is provided in the housing wall,
The defibrating device according to any one of claims 1 to 5, wherein the path communicates with the outlet through a space between an outer surface of the fixing member and the housing wall. A fibrillation processing device according to any one of claims 1 to 6,
A sheet manufacturing apparatus, wherein at least a part of the defibrated material defibrated by the defibrating apparatus is deposited and heated to manufacture a sheet. A supply unit for supplying a raw material to an input port of the defibrating device,
A supply drive unit that drives the supply unit,
A rotation drive unit that drives a rotating body of the defibrating device,
A detection unit that detects a load on the rotation drive unit;
When the load detected by the detection unit exceeds a predetermined threshold, the control unit controls the supply driving unit to reduce the supply speed of the supply unit,
The sheet manufacturing apparatus according to claim 7, comprising: A supply unit for supplying a raw material to an input port of the defibrating device,
A supply drive unit that drives the supply unit,
A rotation drive unit that drives a rotating body of the defibrating device,
A detection unit that detects a load on the rotation drive unit;
When the load detected by the detection unit is below a predetermined threshold, the control unit controls the supply driving unit to increase the supply speed of the supply unit,
The sheet manufacturing apparatus according to claim 7, comprising:

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