JPWO2018043066A1 - Sheet manufacturing equipment - Google Patents

Abstract

The metal is detected so that the influence on the crushing blade can be avoided.
The sheet manufacturing apparatus is disposed in the supply path 500, a crushing unit 12 that crushes used paper as a raw material with the crushing blade 14, a supply unit 10 that moves the used paper in a supply path 500 connected to the crushing unit 12. Metal detectors 501C and 502D. The metal detectors 501C and 502D detect the metal attached to the used paper or contained in the used paper before the used paper reaches the crushing blade 14. The supply unit 10 stops the movement of the used paper when the metal detection units 501C and 502D detect metal.

Description

  The present invention relates to a sheet manufacturing apparatus.

  The sheet manufacturing apparatus includes a crushing unit that cuts the raw material supplied by the supply unit, a defibrating unit that defibrates the cut raw material in a dry manner, a transport pipe that transports the raw material to the defibrating unit, and a transport pipe The structure which has the magnet unit arrange | positioned inside is known (for example, refer patent document 1). In this sheet manufacturing apparatus, when metal foreign matters such as clips and staples are mixed and conveyed together with the raw material, these metal foreign matters are attracted to the magnet unit and can be removed.

JP 2014-208926 A

However, the conventional configuration has a magnet unit inside the conveying pipe that conveys the raw material to the defibrating unit. Therefore, if a metal foreign object is mixed in the raw material, the metal foreign object enters the crushing part, There was a risk of affecting the durability. Further, when the metal foreign object cannot be adsorbed by the magnet unit, the surface of the roller provided in the downstream unit, for example, the pressure unit and the heating unit for forming the sheet may be affected.
Then, an object of this invention is to detect a metal so that the influence on a crushing blade can be avoided.

In order to achieve the above object, the sheet manufacturing apparatus of the present invention includes a crushing unit that crushes a raw material with a crushing blade, a supply unit that moves the raw material in a supply path connected to the crushing unit, and the supply A metal detector disposed in a path, wherein the metal detector is attached to the raw material before the raw material reaches the crushing blade, or detects a metal contained in the raw material, The supply unit stops the movement of the raw material when the metal detection unit detects metal.
According to the present invention, since the metal adhering to the raw material or the metal contained in the raw material is detected before the raw material reaches the roughing blade, the movement of the raw material can be stopped before the metal enters the roughing blade. Therefore, the metal can be detected so as to avoid the influence on the roughing blade.

Further, according to the present invention, the metal detection unit is disposed at a position separated from the crushing blade upstream by the maximum length of the raw material in the supply path.
According to the present invention, it is possible to reliably detect the metal adhering to the raw material or contained in the raw material before the leading edge of the raw material reaches the rough crushing blade.

Further, the present invention includes a plurality of the supply paths, and the metal detection unit is disposed in each of the supply paths, and the supply unit detects the metal when any one of the metal detection units detects metal. Stop moving.
According to the present invention, before the raw material reaches the crushing blade in each of the plurality of supply paths, it is possible to detect the metal adhering to the raw material and stop the movement of the raw material.

In the present invention, the supply path has a plurality of branch supply paths that merge at a merging section located upstream of the crushing section, and the crushed section side of the merging section or the merging section is closer to the crushing section. A metal detector is disposed.
According to the present invention, it is not necessary to provide a metal detector in each of the plurality of branch supply paths, and the circuit and control can be simplified.

In the present invention, when the metal detection unit detects the metal, the supply unit stops the movement of the raw material after moving the raw material to a preset raw material removal position.
According to the present invention, the raw material can be easily removed by moving it to a position where the raw material can be easily removed.

Further, according to the present invention, the supply path includes a resin body that is positioned on the opposite side of the metal detection unit and guides the raw material.
ADVANTAGE OF THE INVENTION According to this invention, it can avoid preventing the metal detection by a metal detection part.

Further, according to the present invention, the supply unit moves the cut sheet as the raw material, and the metal detection unit transfers the metal attached to the rear end of the cut sheet in the moving direction of the cut sheet. It is arranged at a position where the slip is detected before reaching the rough crushing blade.
ADVANTAGE OF THE INVENTION According to this invention, a metal can be detected so that the influence on the crushing blade by the metal adhering to the rear end of a cut sheet can be avoided.

In the present invention, the supply unit includes an automatic sheet feeder for the cut sheet.
According to the present invention, a sheet manufacturing operation can be performed for a long time by accumulating cut sheets as raw materials in the automatic sheet feeder.

In the present invention, the supply unit includes a manual sheet feeder for the cut paper.
According to the present invention, it is possible to manually feed a cut sheet as a raw material.

In the present invention, the metal detection unit detects a binding tool that binds the sheet-like raw material.
According to the present invention, a binding tool such as a clip or a staple for a stapler can be detected.

Further, the present invention provides a defibrating unit for defibrating the crushed material crushed by the crushing unit, a depositing unit for depositing the defibrated material defibrated by the defibrating unit, and depositing by the depositing unit And a sheet forming part for forming a sheet from the deposited deposit.
ADVANTAGE OF THE INVENTION According to this invention, in a dry-type sheet manufacturing apparatus, a metal can be detected so that the influence on a rough crushing blade can be avoided.

The schematic diagram which shows the structure of the sheet manufacturing apparatus which concerns on embodiment of this invention. The perspective view which shows a crushing part and a supply part. The sectional side view which shows the internal structure of a crushing part and a supply part. The sectional side view which expands and shows the internal structure of a supply part main body with a periphery structure. The figure which shows the case where the upper guide part of FIG. 4 is rotated upwards. The flowchart which shows operation | movement of the sheet manufacturing apparatus regarding metal detection.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In addition, embodiment described below does not limit the content of this invention described in the claim. In addition, not all of the configurations described below are essential constituent requirements of the present invention.

FIG. 1 is a schematic diagram illustrating a configuration of a sheet manufacturing apparatus 100 according to the embodiment.
The sheet manufacturing apparatus 100 described in the present embodiment, for example, after used fiber such as confidential paper as a raw material is defibrated and fiberized by dry process, and then pressurized, heated, and cut to obtain new paper. It is an apparatus suitable for manufacturing. By mixing various additives with the fiberized raw material, it is possible to improve the bond strength and whiteness of paper products and add functions such as color, fragrance, and flame resistance according to the application. Also good. In addition, by controlling the density, thickness, and shape of the paper, various thicknesses and sizes of paper such as A4 and A3 office paper and business card paper can be manufactured.
The sheet manufacturing apparatus 100 includes a supply 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 deposition unit 60, a second web forming unit 70, A conveyance unit 79, a sheet forming unit 80, and a cutting unit 90 are provided.

  Further, the sheet manufacturing apparatus 100 includes humidifying units 202, 204, 206, 208, 210, and 212 for the purpose of humidifying the raw material and / or humidifying a space in which the raw material moves. Specific configurations of the humidifying units 202, 204, 206, 208, 210, and 212 are arbitrary, and examples thereof include a steam type, a vaporization type, a hot air vaporization type, and an ultrasonic type.

  In the present embodiment, the humidifying units 202, 204, 206, and 208 are configured by a vaporization type or warm air vaporization type humidifier. That is, the humidifying units 202, 204, 206, and 208 have a filter (not shown) that partially immerses in water, and supplies humidified air with increased humidity by allowing air to pass through the filter. Further, the humidifying units 202, 204, 206, and 208 may include a heater (not shown) that effectively increases the humidity of the humidified air.

  Moreover, in this embodiment, the humidification part 210 and the humidification part 212 are comprised with an ultrasonic humidifier. In other words, the humidifying units 210 and 212 have a vibrating unit (not shown) that atomizes water and supplies mist generated by the vibrating unit.

  The supply unit 10 supplies raw materials to the crushing unit 12. The raw material from which the sheet manufacturing apparatus 100 manufactures the sheet S only needs to include fibers, and examples thereof include paper, pulp, pulp sheet, cloth including nonwoven fabric, and woven fabric. In the present embodiment, a configuration in which the sheet manufacturing apparatus 100 uses waste paper as a raw material is illustrated.

  The crushing unit 12 cuts (crushes) the raw material supplied by the supply unit 10 with a crushing blade 14 into a crushing piece. The rough crushing blade 14 cuts the raw material in the air (in the air) or the like. The crushing unit 12 includes a pair of crushing blades 14 that are cut with a raw material interposed therebetween, and a drive unit 15 (FIG. 2) that rotates the crushing blades 14, and can be configured similarly to a so-called shredder. The shape and size of the coarsely crushed pieces are arbitrary and may be suitable for the defibrating process in the defibrating unit 20. For example, the crushing unit 12 cuts the raw material into pieces of paper having a size of 1 to several cm square or less.

  The crushing unit 12 includes a chute (also referred to as a hopper) 9 that receives the crushing pieces that are cut by the crushing blade 14 and fall. The chute 9 has, for example, a taper shape in which the width gradually decreases in the direction in which the coarsely crushed pieces flow (the traveling direction). Therefore, the chute 9 can receive many coarse fragments. The chute 9 is connected to a tube 2 communicating with the defibrating unit 20, and the tube 2 forms a conveying path for conveying the raw material (crushed pieces) cut by the crushing blade 14 to the defibrating unit 20. . The coarsely crushed pieces are collected by the chute 9 and transferred (conveyed) through the tube 2 to the defibrating unit 20.

  Humidified air is supplied by the humidifying unit 202 to the chute 9 included in the crushing unit 12 or in the vicinity of the chute 9. Thereby, the phenomenon that the crushed material cut | judged with the crushed blade 14 adsorb | sucks to the chute | shoot 9 or the inner surface of the pipe | tube 2 by static electricity can be suppressed. Moreover, since the coarsely crushed material cut by the coarse pulverizing blade 14 is transferred to the defibrating unit 20 together with high-humidity air, an effect of suppressing adhesion of the defibrated material in the defibrating unit 20 can be expected. Moreover, the humidification part 202 is good also as a structure which supplies humidified air to the rough crushing blade 14, and neutralizes the raw material which the supply part 10 supplies.

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

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

  The defibrating unit 20 performs defibration by a dry method. Here, performing a process such as defibration in the air (in the air), not in the liquid, is called dry. In the present embodiment, the defibrating unit 20 uses an impeller mill. Specifically, the defibrating unit 20 includes a rotor (not shown) that rotates at a high speed and a liner (not shown) that is positioned on the outer periphery of the roller. The coarsely crushed pieces crushed by the crushing unit 12 are sandwiched between the rotor and the liner of the defibrating unit 20 and defibrated. The defibrating unit 20 generates an air flow by the rotation of the rotor. With this airflow, the defibrating unit 20 can suck the crushed pieces, which are raw materials, from the tube 2 and convey the defibrated material to the discharge port 24. The defibrated material is sent out from the discharge port 24 to the tube 3 and transferred to the sorting unit 40 through the tube 3.

  Thus, the defibrated material generated in the defibrating unit 20 is conveyed from the defibrating unit 20 to the sorting unit 40 by the air flow generated by the defibrating unit 20. Further, in the present embodiment, the sheet manufacturing apparatus 100 includes a defibrating unit blower 26 that is an airflow generation device, and the defibrated material is conveyed to the sorting unit 40 by the airflow generated by the defibrating unit blower 26. The defibrating unit blower 26 is attached to the pipe 3, sucks air from the defibrating unit 20 together with the defibrated material, and blows it to the sorting unit 40.

  The sorting unit 40 has an inlet 42 through which the defibrated material defibrated from the tube 3 by the defibrating unit 20 flows together with the airflow. The sorting unit 40 sorts the defibrated material to be introduced into the introduction port 42 according to the length of the fiber. Specifically, the sorting unit 40 uses a defibrated material having a size equal to or smaller than a predetermined size among the defibrated material defibrated by the defibrating unit 20 as a first selected material, and a defibrated material larger than the first selected material. Is selected as the second selection. The first selection includes fibers or particles, and the second selection includes, for example, large fibers, undefibrated pieces (crushed pieces that have not been sufficiently defibrated), and defibrated fibers agglomerated or entangled. Including tama etc.

In the present embodiment, the sorting unit 40 includes a drum unit (sieving unit) 41 and a housing unit (covering unit) 43 that accommodates the drum unit 41.
The drum portion 41 is a cylindrical sieve that is rotationally driven by a motor. The drum portion 41 has a net (filter, screen) and functions as a sieve. Based on the mesh, the drum unit 41 sorts a first selection smaller than the mesh opening (opening) and a second selection larger than the mesh opening. As the net of the drum portion 41, for example, a metal net, an expanded metal obtained by extending a cut metal plate, or a punching metal in which a hole is formed in the metal plate by a press machine or the like is used.

The defibrated material introduced into the introduction port 42 is sent into the drum portion 41 together with the air current, and the first selected material falls downward from the mesh of the drum portion 41 by the rotation of the drum portion 41. The second selection that cannot pass through the mesh of the drum portion 41 is caused to flow by the airflow flowing into the drum portion 41 from the introduction port 42, led to the discharge port 44, and sent out to the pipe 8.
The tube 8 connects the inside of the drum portion 41 and the tube 2. The second selection flowed through the pipe 8 flows through the pipe 2 together with the coarsely crushed pieces cut by the coarse crushing section 12 and is guided to the introduction port 22 of the defibrating section 20. As a result, the second selected item is returned to the defibrating unit 20 and defibrated.

  In addition, the first selection material selected by the drum unit 41 is dispersed in the air through the mesh of the drum unit 41 and is applied to the mesh belt 46 of the first web forming unit 45 located below the drum unit 41. Descent towards.

  The first web forming part 45 (separation part) includes a mesh belt 46 (separation belt), a tension roller 47, and a suction part (suction mechanism) 48. The mesh belt 46 is an endless belt, is suspended on three tension rollers 47, and is conveyed in the direction indicated by the arrow in the drawing by the movement of the tension rollers 47. The surface of the mesh belt 46 is constituted by a net in which openings of a predetermined size are arranged. Of the first selection that descends from the selection unit 40, fine particles having a size that passes through the meshes drop downward onto the mesh belt 46, and fibers of a size that cannot pass through the meshes accumulate on the mesh belt 46, and mesh. It is conveyed along with the belt 46 in the direction of the arrow. The fine particles falling from the mesh belt 46 include defibrated materials that are relatively small or low in density (resin particles, colorants, additives, etc.), and the sheet manufacturing apparatus 100 does not use them for manufacturing the sheet S. It is a removed product.

During the normal operation of manufacturing the sheet S, the mesh belt 46 moves at a constant speed V1. Here, the normal operation is an operation excluding the start control and stop control of the sheet manufacturing apparatus 100 to be described later. More specifically, the sheet manufacturing apparatus 100 manufactures a sheet S having a desired quality. It points to while doing.
Accordingly, the defibrated material that has been defibrated by the defibrating unit 20 is sorted into the first sorted product and the second sorted product by the sorting unit 40, and the second sorted product is returned to the defibrating unit 20. Further, the removed material is removed from the first selected material by the first web forming unit 45. The remainder obtained by removing the removed material from the first selection is a material suitable for manufacturing the sheet S, and this material is deposited on the mesh belt 46 to form the first web W1.

  The suction unit 48 sucks air from below the mesh belt 46. The suction part 48 is connected to the dust collecting part 27 via the pipe 23. The dust collecting unit 27 is a filter type or cyclone type dust collecting device, and separates the fine particles from the air flow. A collection blower 28 is installed downstream of the dust collection unit 27, and the collection blower 28 functions as a dust collection suction unit that sucks air from the dust collection unit 27. Further, the air discharged from the collection blower 28 is discharged out of the sheet manufacturing apparatus 100 through the pipe 29.

  In this configuration, air is sucked from the suction portion 48 through the dust collection portion 27 by the collection blower 28. In the suction part 48, the fine particles passing through the mesh of the mesh belt 46 are sucked together with air and sent to the dust collecting part 27 through the pipe 23. The dust collection unit 27 separates and accumulates the fine particles that have passed through the mesh belt 46 from the airflow.

  Accordingly, the first web W1 is formed on the mesh belt 46 by depositing fibers obtained by removing the removed material from the first selected material. By the suction of the collection blower 28, the formation of the first web W1 on the mesh belt 46 is promoted, and the removed material is quickly removed.

  Humidified air is supplied to the space including the drum unit 41 by the humidifying unit 204. The humidified air can humidify the first selection item inside the selection unit 40 and weaken the adhesion of the first selection item to the mesh belt 46 due to the electrostatic force. Therefore, it is possible to easily peel the first selected item from the mesh belt 46 and to prevent the first selected item from adhering to the rotating body 49 or the inner wall of the housing part 43 due to electrostatic force. In addition, the removal object can be efficiently sucked by the suction portion 48.

  In the sheet manufacturing apparatus 100, the configuration for sorting and separating the first defibrated material and the second defibrated material is not limited to the sorting unit 40 including the drum unit 41. For example, you may employ | adopt the structure which classifies the defibrated material processed by the defibrating unit 20 with a classifier. As the classifier, for example, a cyclone classifier, an elbow jet classifier, or an eddy classifier can be used. If these classifiers are used, it is possible to sort and separate the first sort and the second sort. Furthermore, the above classifier can realize a configuration in which removed products including relatively small ones having a low density (resin particles, colorants, additives, etc.) among the defibrated materials are separated and removed. For example, it is good also as a structure which removes the microparticles | fine-particles contained in a 1st selection material from a 1st selection material by a classifier. In this case, for example, the second sorted product may be returned to the defibrating unit 20, the removed product is collected by the dust collecting unit 27, and the first sorted product excluding the removed product may be sent to the pipe 54. .

  In the transport path of the mesh belt 46, air containing mist is supplied by the humidifying unit 210 to the downstream side of the sorting unit 40. The mist that is fine particles of water generated by the humidifying unit 210 descends toward the first web W1 and supplies moisture to the first web W1. Thereby, the amount of moisture contained in the first web W1 is adjusted, and adsorption of fibers to the mesh belt 46 due to static electricity can be suppressed.

  The sheet manufacturing apparatus 100 includes a rotating body 49 that divides the first web W <b> 1 accumulated on the mesh belt 46. The first web W <b> 1 is peeled off from the mesh belt 46 at a position where the mesh belt 46 is turned back by the roller 47 and is divided by the rotating body 49.

  The first web W1 is a soft material in which fibers are accumulated to form a web shape, and the rotating body 49 loosens the fibers of the first web W1 and processes it into a state in which the resin can be easily mixed by the mixing unit 50 described later. .

Although the structure of the rotating body 49 is arbitrary, in this embodiment, it can be made into the rotating feather shape which has a plate-shaped blade | wing and rotates. The rotating body 49 is disposed at a position where the first web W1 peeled off from the mesh belt 46 and the blades are in contact with each other. Due to the rotation of the rotating body 49 (for example, the rotation in the direction indicated by the arrow R in the figure), the blade collides with the first web W1 which is peeled from the mesh belt 46 and conveyed, and the subdivided body P is generated.
The rotating body 49 is preferably installed at a position where the blades of the rotating body 49 do not collide with the mesh belt 46. For example, the distance between the tip of the blade of the rotating body 49 and the mesh belt 46 can be set to 0.05 mm or more and 0.5 mm or less. In this case, the rotating body 49 causes the mesh belt 46 to be damaged without being damaged. One web W1 can be divided efficiently.

The subdivided body P divided by the rotating body 49 descends inside the tube 7 and is transferred (conveyed) to the mixing unit 50 by the airflow flowing inside the tube 7.
Further, humidified air is supplied to the space including the rotating body 49 by the humidifying unit 206. Thereby, the phenomenon that fibers are adsorbed by static electricity to the inside of the tube 7 and the blades of the rotating body 49 can be suppressed. In addition, since high-humidity air is supplied to the mixing unit 50 through the pipe 7, the influence of static electricity can also be suppressed in the mixing unit 50.

  The mixing unit 50 includes an additive supply unit 52 (resin supply unit) that supplies an additive containing resin, a tube 54 that communicates with the tube 7 and flows an air stream including the subdivided body P, and a mixing blower 56.

  The subdivided body P is a fiber obtained by removing the removed material from the first sorted product that has passed through the sorting unit 40 as described above. The mixing unit 50 mixes an additive containing a resin with the fibers constituting the subdivided body P.

  In the mixing unit 50, an air flow is generated by the mixing blower 56, and is conveyed while mixing the subdivided body P and the additive in the pipe 54. Moreover, the subdivided body P is loosened in the process of flowing through the inside of the tube 7 and the tube 54, and becomes a finer fiber.

  The additive supply unit 52 (resin storage unit) is connected to a resin cartridge (not shown) that accumulates the additive, and supplies the additive inside the resin cartridge to the tube 54. The additive supply unit 52 temporarily stores an additive composed of fine powder or fine particles inside the resin cartridge. The additive supply unit 52 includes a discharge unit 52a (resin supply unit) that sends the additive once stored to the pipe 54.

  The discharge unit 52 a includes a feeder (not shown) that sends the additive stored in the additive supply unit 52 to the pipe 54, and a shutter (not shown) that opens and closes a pipeline that connects the feeder and the pipe 54. . When this shutter is closed, the pipe line or opening connecting the discharge part 52a and the pipe 54 is closed, and supply of the additive from the additive supply part 52 to the pipe 54 is cut off.

  In the state where the feeder of the discharge unit 52a is not operating, the additive is not supplied from the discharge unit 52a to the tube 54. However, when a negative pressure is generated in the tube 54, the feeder of the discharge unit 52a is stopped. Even so, the additive may flow to the tube 54. By closing the discharge part 52a, the flow of such an additive can be reliably interrupted.

The additive supplied by the additive supply unit 52 includes a resin for binding a plurality of fibers. Thermoplastic resin or thermosetting resin, for example, AS resin, ABS resin, polypropylene, polyethylene, polyvinyl chloride, polystyrene, acrylic resin, polyester resin, polyethylene terephthalate, polyphenylene ether, polybutylene terephthalate, nylon, polyamide, polycarbonate Polyacetal, polyphenylene sulfide, polyether ether ketone, and the like. These resins may be used alone or in combination. That is, the additive may contain a single substance, may be a mixture, or may contain a plurality of types of particles each composed of a single substance or a plurality of substances. The additive may be in the form of a fiber or powder.
The resin contained in the additive melts by heating and binds the plurality of fibers. Accordingly, in a state where the resin is mixed with the fiber and not heated to a temperature at which the resin melts, the fibers are not bound to each other.

  In addition to the resin that binds the fibers, the additive supplied by the additive supply unit 52 includes a colorant for coloring the fibers, a fiber agglomeration, and a resin depending on the type of the sheet S to be manufactured. An aggregation inhibitor for suppressing aggregation and a flame retardant for making fibers difficult to burn may be included. Moreover, the additive which does not contain a colorant may be colorless or light enough to be considered colorless, or may be white.

  Due to the air flow generated by the mixing blower 56, the subdivided body P descending the tube 7 and the additive supplied by the additive supply unit 52 are sucked into the tube 54 and pass through the mixing blower 56. The fibers constituting the subdivided body P and the additive are mixed by the air flow generated by the mixing blower 56 and / or the action of the rotating part such as the blades of the mixing blower 56, and this mixture (the first sort and the additive) ) Is transferred to the deposition section 60 through the tube 54.

  In addition, the mechanism which mixes a 1st selection material and an additive is not specifically limited, It may stir with the blade | wing which rotates at high speed, and uses rotation of a container like a V-type mixer. These mechanisms may be installed before or after the mixing blower 56.

  The depositing unit 60 deposits the defibrated material defibrated by the defibrating unit 20. More specifically, the depositing unit 60 introduces the mixture that has passed through the mixing unit 50 from the introduction port 62, loosens the entangled defibrated material (fibers), and lowers it while dispersing it in the air. Furthermore, when the additive resin supplied from the additive supply unit 52 is fibrous, the deposition unit 60 loosens the entangled resin. Thereby, the deposition unit 60 can deposit the mixture on the second web forming unit 70 with good uniformity.

  The depositing unit 60 includes a drum unit 61 and a housing unit (covering unit) 63 that accommodates the drum unit 61. The drum unit 61 is a cylindrical sieve that is rotationally driven by a motor. The drum portion 61 has a net (filter, screen) and functions as a sieve. Due to the mesh, the drum portion 61 allows fibers and particles having a smaller mesh opening (opening) to pass through and lowers the drum portion 61 from the drum portion 61. The configuration of the drum unit 61 is the same as the configuration of the drum unit 41, for example.

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

  A second web forming unit 70 is disposed below the drum unit 61. The 2nd web formation part 70 accumulates the passage thing which passed the accumulation part 60, and forms the 2nd web W2. The 2nd web formation part 70 has the mesh belt 72, the roller 74, and the suction mechanism 76, for example.

  The mesh belt 72 is an endless belt, is suspended on a plurality of rollers 74, and is conveyed in the direction indicated by the arrow in the drawing by the movement of the rollers 74. The mesh belt 72 is made of, for example, metal, resin, cloth, or non-woven fabric. The surface of the mesh belt 72 is configured by a net having openings of a predetermined size. Among the fibers and particles descending from the drum unit 61, fine particles having a size that passes through the mesh drops to the lower side of the mesh belt 72, and fibers having a size that cannot pass through the mesh are deposited on the mesh belt 72. 72 is conveyed in the direction of the arrow. During the operation of manufacturing the sheet S, the mesh belt 72 moves at a constant speed V2.

The mesh of the mesh belt 72 is fine and can be sized so that most of the fibers and particles descending from the drum portion 61 are not allowed to pass through.
The suction mechanism 76 is provided below the mesh belt 72 (on the side opposite to the accumulation unit 60 side). The suction mechanism 76 includes a suction blower 77, and can generate an air flow (an air flow directed from the accumulation portion 60 toward the mesh belt 72) downward to the suction mechanism 76 by the suction force of the suction blower 77.

The mixture dispersed in the air by the deposition unit 60 is sucked onto the mesh belt 72 by the suction mechanism 76. Thereby, formation of the 2nd web W2 on the mesh belt 72 can be accelerated | stimulated, and the discharge speed from the deposition part 60 can be enlarged. Furthermore, the suction mechanism 76 can form a downflow in the dropping path of the mixture, and can prevent the defibrated material and additives from being entangled during the dropping.
The suction blower 77 (deposition suction unit) may discharge the air sucked from the suction mechanism 76 out of the sheet manufacturing apparatus 100 through a collection filter (not shown). Alternatively, the air sucked by the suction blower 77 may be sent to the dust collecting unit 27 and the removed matter contained in the air sucked by the suction mechanism 76 may be collected.

  Humidified air is supplied to the space including the drum unit 61 by the humidifying unit 208. The humidified air can humidify the inside of the accumulation portion 60, suppress the adhesion of fibers and particles to the housing portion 63 due to electrostatic force, and quickly drop the fibers and particles onto the mesh belt 72, so Two webs W2 can be formed.

  As described above, the second web W <b> 2 in a state of containing a large amount of air and softly bulging is formed by passing through the depositing unit 60 and the second web forming unit 70 (web forming step). The second web W2 deposited on the mesh belt 72 is conveyed to the sheet forming unit 80.

  In the conveyance path of the mesh belt 72, air containing mist is supplied by the humidifying unit 212 to the downstream side of the deposition unit 60. Thereby, the mist which the humidification part 212 produces | generates is supplied to the 2nd web W2, and the moisture content which the 2nd web W2 contains is adjusted. Thereby, adsorption | suction etc. of the fiber to the mesh belt 72 by static electricity can be suppressed.

  The sheet manufacturing apparatus 100 is provided with a conveyance unit 79 that conveys the second web W2 on the mesh belt 72 to the sheet forming unit 80. The conveyance unit 79 includes, for example, a mesh belt 79a, a roller 79b, and a suction mechanism 79c.

  The suction mechanism 79c generates an air flow to suck the second web W2, and causes the mesh belt 79a to attract the second web W2. The mesh belt 79a moves by the rotation of the roller 79b, and conveys the second web W2 to the sheet forming unit 80. The moving speed of the mesh belt 72 and the moving speed of the mesh belt 79a are the same, for example. Thus, the conveyance unit 79 peels and conveys the second web W2 formed on the mesh belt 72 from the mesh belt 72.

  The sheet forming unit 80 forms the sheet S from the deposit accumulated in the accumulation unit 60. More specifically, the sheet forming unit 80 forms the sheet S by pressurizing and heating the second web W2 (deposit) deposited on the mesh belt 72 and conveyed by the conveying unit 79. In the sheet forming unit 80, heat is applied to the fibers of the defibrated material included in the second web W2 and the additive, thereby binding the plurality of fibers in the mixture to each other via the additive (resin). .

The sheet forming unit 80 includes a pressurizing unit 82 that pressurizes the second web W2 and a heating unit 84 that heats the second web W2 pressurized by the pressurizing unit 82.
The pressurizing unit 82 includes a pair of calendar rollers 85 and presses the second web W2 with a predetermined nip pressure. The second web W2 is reduced in thickness by being pressurized, and the density of the second web W2 is increased. One of the pair of calendar rollers 85 is a driving roller driven by a motor (not shown), and the other is a driven roller. The calendar roller 85 is rotated by a driving force of a motor (not shown) and conveys the second web W <b> 2 having a high density by pressurization toward the heating unit 84.

  The heating unit 84 can be configured using, for example, a heating roller (heater roller), a hot press molding machine, a hot plate, a hot air blower, an infrared heater, and a flash fixing device. In the present embodiment, the heating unit 84 includes a pair of heating rollers 86. The heating roller 86 is heated to a preset temperature by a heater installed inside or outside. The heating roller 86 heats the second web W <b> 2 pressed by the calendar roller 85 to form the sheet S. One of the pair of heating rollers 86 is a driving roller driven by a motor (not shown), and the other is a driven roller. The heating roller 86 is rotated by a driving force of a motor (not shown) and conveys the heated sheet S toward the cutting unit 90.

  The number of calendar rollers 85 provided in the pressurizing unit 82 and the number of heating rollers 86 provided in the heating unit 84 are not particularly limited.

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

  Thus, a single-sheet sheet S having a predetermined size is formed. The cut sheet S is discharged to the discharge unit 96. The discharge unit 96 includes a discharge tray for discharging sheets S of a predetermined size or a stacker for storing the sheets S.

  In the above configuration, the humidifying units 202, 204, 206, and 208 may be configured by a single vaporizing humidifier. In this case, the humidified air generated by one humidifier may be branched and supplied to the crushing unit 12, the housing unit 43, the pipe 7, and the housing unit 63. This configuration can be easily realized by branching and installing a duct (not shown) for supplying humidified air. Of course, the humidifying sections 202, 204, 206, and 208 can be configured by two or three vaporizing humidifiers. In this embodiment, humidified air is supplied to the humidifying units 202, 204, 206, and 208 from a vaporizing humidifier (not shown).

  Moreover, in the said structure, the humidification parts 210 and 212 may be comprised with one mist type humidifier, and may be comprised with two mist type humidifiers. For example, the air containing the mist which one humidifier produces | generates can be set as the structure branched and supplied to the humidification part 210 and the humidification part 212. FIG. In the present embodiment, air containing mist is supplied to the humidifying units 210 and 212 from a mist type humidifier (not shown).

Next, the crushing unit 12 and the supply unit 10 will be described.
FIG. 2 is a perspective view showing the crushing unit 12 and the supply unit 10. FIG. 3 is a side sectional view showing the internal structure of the crushing unit 12 and the supply unit 10. As shown in FIG. 2, the sheet manufacturing apparatus 100 includes a control unit 150 that controls each unit of the sheet manufacturing apparatus 100 including the crushing unit 12 and the supply unit 10, and a display unit 160 that displays various types of information. .
As shown in FIG. 3, the crushing unit 12 includes a chute 9 downstream of the pair of crushing blades 14. The chute 9 has chute walls 9A and 9B facing each other. The chute walls 9 </ b> A and 9 </ b> B are formed as inclined walls that are inclined obliquely so that the opening becomes larger toward the upper side.

  A drive unit 15 (FIG. 2) that rotates the crushing blade 14 is provided on the side of the chute 9. The drive unit 15 has a drive source such as a motor, and the raw material put into the chute 9 is cut by the pair of crushing blades 14 by the power of the drive source. A pipe 2 communicating with the defibrating unit 20 is connected to the lower part of the chute, and is cut by the suction force from the defibrating unit blower 26 (FIG. 1), the inclination of the chute walls 9A and 9B, and the action of gravity. The raw material (crushed pieces) is introduced into the pipe 2.

By the way, when the raw material is cut by the crushing unit 12, the raw material cut by static electricity is charged, and the charged raw material adheres to and accumulates on the chute 9, so that the supply of the raw material becomes unstable, There is a risk of clogging.
Therefore, in this configuration, the pair of ionizers 16 are arranged so as to face each other along the inner surfaces of the opposing chute walls 9A and 9B, thereby neutralizing the cut raw material and the charge in the chute 9 to eliminate static electricity. Increase the effect.

More specifically, the ionizer 16 is disposed above a pair of opposed chute walls 9A and 9B (opposite the chute walls 9A and 9B with respect to the direction toward the pipe 2 through which the raw material (crushed pieces) is guided). The In other words, the pair of ionizers 16 are arranged opposite to each other using a space above the chute walls 9A and 9B and open to the side of the pair of crushing blades 14.
The ionizer 16 includes an ion generator (not shown) that generates ions, and an outlet 16A that blows out ions together with air supplied from a compressor (not shown). Thereby, the ionizer 16 blows off the ionized air.

  The ionizers 16 are respectively arranged in a posture inclined along the same angle as the inclination of the chute walls 9A and 9B along the chute walls 9A and 9B of the chute 9. Moreover, the blower outlet 16A of each ionizer 16 is provided in the position and direction which can discharge | release ion along the inner surface of chute | shoot walls 9A and 9B.

Since the ionizer 16 is arranged in an inclined posture along the chute walls 9A and 9B, the ionizer 16 does not block the flow of air and ions along the chute walls 9A and 9B. It is easy to secure a separation distance.
The air outlet 16A extends along the upper edges of the chute walls 9A and 9B, so that ions can be discharged over substantially the entire surface of the chute walls 9A and 9B.

  FIG. 3 shows the flow of ions (ionized air) with arrows. First, the ions from the pair of ionizers 16 travel along the chute walls 9A and 9B by the blowing force of the ionizers 16 themselves and the suction force from the defibrating unit blower 26 provided downstream of the crushing unit 12. And flows downstream (downward). Since the inner space of the chute 9 becomes narrower toward the downstream side, air including ions flowing along the pair of chute walls 9A and 9B influence each other and generate opposed vortices. The opposing vortex flows into a vortex that rotates up and down, and the raw material (crushed pieces) cut by the pair of crushed blades 14 flows along this vortex.

Since the cut raw material and ions flow along a vortex, the chance of contact between the raw material and ions is increased, and the static elimination effect can be enhanced. In addition, since ions flow along the chute walls 9A and 9B, the phenomenon that the raw material is adsorbed on the chute walls 9A and 9B due to static electricity can be efficiently suppressed.
In addition, the ionizer 16 is not limited to the structure which can discharge | release ion over the substantially whole surface of chute | shoot walls 9A and 9B. For example, even if the ionizer 16 discharges ions downstream along the partial surfaces of the chute walls 9A and 9B, an opposing vortex can be generated due to the influence of the ionizers 16. That is, by disposing the ionizer 16 in the chute 9 and downstream of the crushing blade 14 so as to be able to generate a vortex, the charge eliminating effect can be enhanced efficiently.

The supply unit 10 will be described.
As shown in FIG. 3, the supply unit 10 is a device that moves used paper as a raw material in a supply channel 500 connected to the crushing unit 12. The supply unit 10 includes a stacker (also referred to as a paper feed stacker) 10A as a first raw material input unit that inputs the raw material into the supply path 500, a tray (also referred to as a paper supply tray) 10B as a second raw material input unit, A supply unit main body 10 </ b> C that forms a channel 500.

FIG. 4 is an enlarged side sectional view showing the internal structure of the supply unit main body 10C together with the peripheral configuration.
The stacker 10 </ b> A is an automatic paper feeder that accumulates and accumulates used paper that is single-size sheets of a predetermined size as used paper, and automatically feeds the accumulated used paper one by one to the supply path 500. More specifically, the stacker 10 </ b> A has a supply mechanism including a pair of conveyance rollers 601 that conveys the uppermost used paper, and the supply path 500 supplies the used paper one by one under the control of the control unit 150. To supply.
Further, the stacker 10A is provided so as to be detachable from the supply unit main body 10C in accordance with an operation of a lock lever (not shown), and a caster 602 (FIG. 2) for easily moving the stacker 10A when detached. have. For this reason, if a paper jam occurs in the vicinity of the conveying roller pair 601 or the like, the stacker 10A can be moved from the supply unit main body 10C and the used paper can be taken out.

The tray 10B is disposed above the stacker 10A, and constitutes a manual paper feeder that enables paper sheets of a predetermined size to be manually fed as used paper. The tray 10B can feed sheet paper of the same size as the stacker or a different size manually. The tray 10B of this configuration is capable of feeding A4 size waste paper that can be fed by the stacker 10A and A3 size waste paper that cannot be fed by the stacker 10A.
The tray 10B has a supply mechanism including a pair of conveying rollers 604 that conveys the used paper stacked on the tray 10B one by one from the uppermost used paper. The used mechanism controls the used paper under the control of the control unit 150. Are supplied to the supply channel 500 one by one. That is, the tray 10B is also an automatic paper feeder that automatically feeds used paper one by one to the supply path 500.
In addition, you may make it the structure provided not only with the structure provided with both the stacker 10A and the tray 10B but only any one.

  10 C of supply part main bodies are provided with the 1st branch supply path 501 extended toward the stacker 10A, and the 2nd branch supply path 502 extended toward the tray 10B as the supply path 500 connected with the crushing part 12. FIG. Further, the supply unit main body 10 </ b> C includes a merging unit 503 where the downstream ends of the first and second branch supply channels 501 and 502 merge, and a downstream supply channel 504 extending from the merging unit 503 toward the crushing unit 12. . Each of the units 501 to 504 constituting the supply channel 500 constitutes a supply channel upstream of the crushing unit 12.

The first branch supply path 501 includes a pair of upper and lower guide parts 501A and 501B and a metal detection part 501C for detecting metal.
The pair of upper and lower guide portions 501A and 501B are disposed with a space in the vertical direction with a gap through which used paper passes, and extend horizontally so as to linearly connect between the conveying roller pair 601 of the stacker 10A and the merge portion 503. A supply path is formed. Each of the pair of upper and lower guide portions 501A and 501B is made of resin, and each upstream end portion is formed in a shape that widens the gap upward and downward, and guides the entrance of the used paper.

The metal detection unit 501C is arranged on the upper guide unit 501A with the detection surface facing downward, and extends over the entire width of the waste paper supplied from the stacker 10A. The metal detection unit 501C is a sensor that detects a change in the magnetic field to detect the metal attached to the used paper or contained in the used paper, and outputs the detection result to the control unit 150. With this metal detection unit 501C, for example, a binding tool such as a clip or a staple for a stapler can be detected as the metal mixed in the raw material.
Here, since the resin does not affect the magnetic field, the pair of upper and lower guide portions 501A and 501B are made of resin, so that the metal detection by the metal detection unit 501C is not hindered. In addition, if the part facing the metal detection unit 501C is a metal member, the magnetic detection unit 501C causes a change in the magnetic field when either the metal detection unit 501C or the opposite metal member vibrates. There is a risk of false detection.

  On the other hand, in this configuration, the lower guide portion 501B functions as a resin body that is located on the opposite side of the metal detection portion 501C and guides used paper. Thereby, the false detection of the metal detection part 501C can be avoided more.

  The first branch supply path 501 is not provided with a pair of transport rollers for transporting used paper. The reason for this is that the separation distance between the conveyance roller pair 601 upstream of the first branch supply path 501 and the conveyance roller pair 503C described later of the junction 503 downstream of the first branch supply path 501 is the minimum length of the waste paper from the stacker 10A. This is because it is shorter than the width (A4 width 210 mm). That is, the used paper can be transported to the first branch supply path 501 by both transport roller pairs 601 and 503C.

The second branch supply path 502 includes a pair of guide units 502A and 502B, a pair of transport roller pairs 502C, a metal detection unit 502D that detects metal, and a paper jam detection unit 502E that detects used paper jam as a raw material. With.
The pair of guide portions 502A are arranged to face each other with a gap in order to provide a gap through which the used paper passes, and obliquely upward toward the tray 10B so as to linearly connect between the conveying roller pair 604 of the tray 10B and the joining portion 503. Forming a supply path extending to The lower guide portion 502B is formed of a metal plate and is fixed to a frame (not shown) or the like included in the supply portion main body 10C.

A pair of conveyance rollers 502C is provided in the middle of the pair of guide portions 502A and 502B. More specifically, in the conveyance roller pair 502C, the separation distance from the conveyance roller pair 604 of the tray 10B provided on the upstream side of the second branch supply path 502 is the minimum length of the waste paper from the tray 10B (A4 width 210 mm). ) In a shorter position.
The metal detector 502D has the same configuration as the metal detector 501C described above. The metal detection unit 502D is provided upstream of the conveyance roller pair 502C in the lower guide unit 502B, and is arranged with the detection surface as an upper surface. Since the detection surface is the upper surface, the lower guide portion 502B does not affect the magnetic field detected by the detection surface and does not hinder metal detection by the metal detection portion 502D.

The upper guide portion 502A is formed of a resin guide portion 502A1 upstream of the transport roller pair 502C, and a metal guide portion 502A2 downstream of the transport roller pair 502C.
The resin-made guide portion 502A1 functions as a resin body that is located on the opposite side of the metal detection portion 502D and guides used paper. For this reason, it is possible to guide used paper without interfering with metal detection by the metal detection unit 502D. Further, since the metal guide portion 502A2 is not located on the opposite side of the metal detection portion 502D, metal detection by the metal detection portion 502D is not hindered.
The metal guide portion 502A2 is formed integrally with an upper guide portion 503A, which will be described later, of the junction portion 503. The lower guide portion 502B is provided with a resin wiring support portion 502F that supports the wiring of the metal detection portion 502D on the surface opposite to the metal detection portion 502D.

  The paper jam detection unit 502E is provided in the lower guide unit 502B between the conveyance roller pair 502C and the metal detection unit 502D, and outputs a detection result to the control unit 150. The paper jam detection unit 502E is, for example, an optical type, and detects paper jam by detecting the presence / absence of the leading edge of the used paper at a plurality of locations based on the detection result of the transmitted light amount or the reflected light amount of the emitted light. A wide variety of known configurations can be applied to the paper jam detection unit 502E and the paper jam detection method.

The merging unit 503 includes a pair of upper and lower guide units 503A and 503B, a plurality of conveying roller pairs 503C and 503D, a paper jam detecting unit 503E for detecting a paper jam of used paper as a raw material, and a thickness of the used paper as a raw material. A paper thickness detection unit 503F for detection.
The pair of upper and lower guide portions 503A and 503B are arranged at intervals in the vertical direction with a gap through which used paper passes, and after extending horizontally so as to be connected to the downstream ends of the first and second branch supply paths 501 and 502, A supply path extending obliquely downward toward the crushing unit 12 is formed. The pair of upper and lower guide portions 503A and 503B are formed of a metal plate material. Of the pair of upper and lower guide portions 503A and 503B, the lower guide portion 503B is supported by a frame (not shown) or the like included in the supply portion main body 10C.

On the other hand, the upper guide portion 503A is formed integrally with a metal guide portion 502A2 constituting the downstream portion of the upper guide portion 502A of the second branch supply path 502.
Further, the upper guide portion 503A is formed to be rotatable up and down with reference to a rotation shaft 503K provided at the downstream end so that a gap between the upper guide portion 503A and the lower guide portion 503B can be enlarged.
Here, FIG. 5 is a diagram showing a case where the upper guide portion 503A of FIG. 4 is rotated upward. As shown in FIG. 5, the supply path 500 can be exposed to the outside from the middle of the second branch supply path 502 to substantially the entire merging section 503 by rotating the upper guide section 503 </ b> A upward. . As a result, the used paper located in the supply path 500 can be taken out from the outside.

  As shown in FIG. 4, the upstream conveying roller pair 503C has a separation distance from each of the conveying roller pair 601 and 502 provided upstream of the conveying roller pair 503C, so that the minimum length of the used paper (A4 It is provided at a position shorter than the width 210 mm). The downstream conveying roller pair 503D is provided at a position where the separation distance from the upstream conveying roller pair 503C is shorter than the minimum length of the used paper (A4 width 210 mm). Further, the downstream conveying roller pair 503D is provided at a position where the distance from the crushing blade 14 that also serves as the conveying mechanism of the crushing unit 12 is shorter than the minimum length of the used paper (A4 width 210 mm). .

In these conveyance roller pairs 503C and 503D, the upper conveyance roller is provided in the upper guide portion 503A, and the lower conveyance roller is provided in the lower guide portion 503B. Accordingly, as illustrated in FIG. 5, the transport roller pair 503 </ b> C and 503 </ b> D does not get in the way when the upper guide portion 503 </ b> A is moved upward and the used paper in the supply path 500 is taken out.
The paper jam detection unit 503E is provided in the upper guide unit 503A between the pair of conveyance rollers 503C and 503D of the junction unit 503, and outputs the detection result to the control unit 150. The paper jam detection unit 503E is also configured optically or the like, similar to the paper jam detection unit 502E. As shown in FIG. 5, the paper jam detection unit 503E moves integrally with the upper guide unit 503A, so that it does not get in the way when the used paper in the supply path 500 is taken out.

The paper thickness detection unit 503 </ b> F measures the thickness of used paper supplied to the merge unit 503 and outputs the measurement result to the control unit 150. The paper thickness detection unit 503F can widely apply a known sensor such as a contact type sensor that detects the paper thickness by contacting the used paper, or a non-contact sensor that detects the paper thickness in a non-contact manner using ultrasonic waves. is there. The paper thickness detection unit 503F is fixed to a frame (not shown) included in the supply unit main body 10C.
As shown in FIG. 5, the upper guide portion 503A can be rotated upward while avoiding the paper thickness detection portion 503F. Specifically, the upper guide portion 503A is provided with an opening shape that avoids the paper thickness detection portion 503F, or the paper thickness detection portion 503F is disposed away from the upper guide portion 503A.

The downstream supply path 504 includes a pair of upper and lower guide portions 504A and 504B and a paper jam detection portion 504C that detects used paper jam as a raw material.
The pair of upper and lower guide portions 504A and 504B are arranged at intervals in the vertical direction with a gap through which the used paper passes, and are roughened so as to linearly connect between the merging portion 503 and the coarse crushing blade 14 of the coarse crushing portion 12. A supply path extending obliquely downward toward the crushing portion 12 is formed. The pair of upper and lower guide portions 504A and 504B are formed of a metal plate material and are supported by the crushing portion 12 or the supply portion main body 10C.
The paper jam detection unit 504C is provided in the upper guide unit 504A between the merge unit 503 and the crushing unit 12, and outputs the detection result to the control unit 150. The paper jam detection unit 504C is also configured optically or the like, similar to the paper jam detection unit 503E.

As described above, in this configuration, in the supply channel 500 connected to the crushing unit 12, the metal detection units 501C and 502D are provided in the first and second branch supply channels 501 and 502 upstream of the junction unit 503, respectively. Yes. Thereby, the separation distance of the rough crushing blade 14 of the crushing part 12 and the metal detection parts 501C and 502D can be earned.
Specifically, the metal detection unit 501C provided in the first branch supply path 501 is equal to or greater than the maximum length of waste paper (sheet paper) that passes through the first branch supply path 501 (vertical length of A3 420 mm), It is provided at a position away from the crushing blade 14. Further, the metal detector 502D provided in the second branch supply path 502 has a maximum length (A4 vertical length of 297 mm) of waste paper (cut sheet paper) passing through the second branch supply path 501 and a coarse crushing blade. 14 is provided at a position away from 14.
Thereby, the leading and trailing ends of the used paper supplied from the stacker 10A or the tray 10B via the first and second branch supply paths 501 and 502 adhere to the used paper before reaching the rough crushing blade 14, or Metal contained in waste paper can be detected.

FIG. 6 is a flowchart showing the operation of the sheet manufacturing apparatus 100 relating to metal detection. This flow is executed during the operation of manufacturing the sheet S. However, even during the operation of manufacturing the sheet S, if there is a period during which the used paper as a raw material is not supplied to the crushing unit 12 by the supply unit 10, the flow may not be executed during that period. Good.
The control unit 150 identifies the current position of the used paper based on the detection results of the paper jam detection units 502E, 503E, and 504C while supplying the used paper by the supply unit 10, and includes information indicating the identified current position. Store in a memory (not shown). That is, the control unit 150 also uses the paper jam detection units 502E, 503E, and 504C as a paper detection unit that detects the leading edge or the trailing edge of the paper. The information indicating the current position is a simple method of applying flag information indicating any one of the paper jam detection units 502E, 503E, and 504C that has detected the leading edge or the trailing edge of the paper, or further, a pair of conveyance rollers 601. , 604, 502C, 503C, and 503D, a method of applying accurate position information (movement distance) calculated in consideration of the amount of rotation can be applied.

First, the control unit 150 determines whether or not a metal is detected by any of the metal detection units 501C and 502D (step S100). This determination process is repeatedly executed until the metal is detected or until the operation for manufacturing the sheet S is completed.
When metal is detected (step S100; YES), the control unit 150 moves the used paper to a predetermined used paper removal position (raw material removal position) based on the used paper detection position (step S101).

  Here, the used paper removal position is a position suitable for removing used paper, and more specifically, is an area of the joining portion 503 exposed to the outside when the upper guide portion 503A is opened upward. Then, when the used paper is moved to the used paper removal position, the control unit 150 stops the movement (step S102).

For example, by identifying the paper jam detection units 502E, 503E, and 504C that detect the leading edge or the trailing edge of used paper from which metal has been detected, the conveyance roller pairs 601, 604, 502C, and 503C corresponding to the specified detection unit are identified. , 503D drive amount (for example, the number of pulses) is specified. Then, by driving the transport roller pairs 601, 604, 502C, 503C, and 503D by this driving amount, the leading edge or the trailing edge of the used paper can be accurately moved to the used paper removal position.
Alternatively, the transport roller pairs 601, 604, 502C, 503C, and 503D are driven until the used paper whose metal has been detected is detected by the predetermined paper jam detection units 502E, 503E, and 504C. This also allows the leading or trailing end of the used paper to be accurately moved to the used paper removal position.
In this case, if at least a part of the used paper is exposed to the merging portion 503, the upper guide portion 503A can be opened and the used paper can be taken out. An arbitrary method can be applied to the control method for moving the used paper to the used paper removal position.

  Then, the control part 150 performs the alerting | reporting process corresponding to metal detection (step S103). This notification process is a display process indicating that metal has been detected on the display unit 160, or a display process that prompts the user to take out old paper that has detected metal, and can be widely applied to display information to be notified when metal is detected. . In addition, when the sheet manufacturing apparatus 100 has a function of notifying a voice, a voice notification process may be performed. The above is the operation related to metal detection.

By the above operation, for example, when a metal adheres to the front end of the used paper supplied from the tray 10B, the metal is detected by the metal detecting unit 502D, and the front end of the used paper is detected by the paper jam detecting unit 502E. The control unit 150 sets a moving amount of the used paper based on the detected position of the used paper, thereby causing the used paper to face the merge unit 503 and downstream of the conveyance roller pair 604 of the tray 10B. The amount of movement to be moved to can be set.
Further, for example, when metal adheres to the rear end of the used paper supplied from the tray 10B, the metal is detected by the metal detecting unit 502D, and the used paper is detected by the paper jam detecting unit 502E. In addition, it is possible to specify A3 size or A4 size depending on whether the paper jam detection unit 503E detects used paper. By using these detection results, the control unit 150 can set a movement amount for moving the used paper to a position where it can be easily taken out.
Based on the set moving amount, the transport roller pairs 604, 502C, 503C, and 503D are appropriately driven to move the used paper to the used paper removal position, so that the used paper can be taken out without operating the transport roller pair 604. it can.

Further, for example, when metal is attached to the leading or trailing end of the used paper supplied from the stacker 10A, the metal is detected by the metal detection unit 501C. In that case, the control unit 150 drives the transport roller pairs 601 and 503C until the paper jam detection unit 503E provided in the junction unit 503 detects the leading edge of the used paper. As a result, the used paper can be moved to a position downstream of the pair of conveying rollers 601 of the stacker 10 </ b> A and facing the junction 503. Therefore, the used paper can be taken out without operating the transport roller pair 601 and without retracting the stacker 10A from the supply unit main body 10C.
In addition, it is not limited to the process of moving the used paper to the used paper removal position when the metal is detected. At least, the used paper that has detected the metal may be stopped before the used paper reaches the crushing blade 14. Arbitrary control methods can be applied within a range.

As described above, the sheet manufacturing apparatus 100 according to the present embodiment uses the crushing blade 14 to crush used paper used as a raw material, and the supply path 500 connected to the crushing unit 12 moves the used paper. Unit 10 and metal detection units 501C and 502D disposed in the supply path 500. The metal detectors 501C and 502D detect the metal attached to the used paper or contained in the used paper before the used paper reaches the crushing blade 14. The supply unit 10 stops the movement of used paper when the metal detection units 501C and 502D detect metal under the control of the control unit 150.
According to this configuration, before the used paper reaches the rough crushing blade 14, it adheres to the used paper or detects the metal contained in the used paper, so that the movement of the used paper stops before the metal enters the crushing blade 14. it can. Therefore, the metal can be detected so as to avoid the influence on the roughing blade 14.

  In addition, the metal detectors 501C and 502D are arranged at positions away from the rough crushing blade 14 on the upstream side in the supply path 500 by the maximum length of the used paper. Thereby, before the front end of the used paper reaches the crushing blade 14, it becomes possible to reliably detect the metal adhering to the used paper or contained in the used paper.

  The supply path 500 includes first and second branch supply paths 501 and 502 constituting a plurality of supply paths, and the metal detection units 501C and 502D are provided in the first and second branch supply paths 501 and 502, respectively. Be placed. In addition, the supply unit 10 stops the movement of the used paper when one of the metal detection units 501C and 502D detects metal under the control of the control unit 150. Thereby, before the used paper supplied from each of the first and second branch supply paths 501 and 502 reaches the crushing blade 14, it is possible to detect the metal adhering to the used paper and stop the movement of the used paper.

  In addition, when the metal detection units 501C and 502D detect metal under the control of the control unit 150, the supply unit 10 moves the used paper to a preset used paper removal position and then stops the used paper movement. By moving the used paper to a position where it can be easily removed, the used paper can be easily removed.

  Further, the supply path 500 includes guide portions 501B and 502A1 that function as a resin that guides used paper and is located on the opposite side of the metal detection portions 501C and 502D. Thereby, the metal detection using the change of the magnetic field by the metal detection units 501C and 502D can be prevented from being hindered.

  Further, the supply unit 10 moves the cut sheet, and the metal detection units 501C and 502D move the metal attached to the rear end of the cut sheet in the moving direction of the cut sheet, and the cut sheet into the roughing blade 14. It is arranged at a position to detect before reaching. Thereby, a metal can be detected so that the influence on the rough crushing blade 14 by the metal adhering to the rear end of the cut sheet can be avoided.

Further, since the supply unit 10 includes a stacker 10A as an automatic sheet feeder for cut sheets, a long time sheet S can be manufactured by accumulating the cut sheets as raw materials in the stacker 10A. become.
In addition, since the supply unit includes the tray 10B as the manual paper feeder for the cut paper, it is possible to manually feed the cut paper as a raw material.

  Further, since the metal detection units 501C and 502D detect a binding tool that binds used paper that is a sheet-like raw material, it is possible to detect a clip, a staple for a stapler, and the like.

In the supply channel 500 connected to the crushing unit 12, the positions where the metal detection units 501C and 502D are provided are not limited to the first and second branch supply channels 501 and 502 on the upstream side of the merge unit 503. Even if it is closer to the crushing unit 12 side than the joining unit 503 or the joining unit 503, the used paper can be attached to the used paper before reaching the crushing blade 14 or the metal contained in the used paper can be detected. A metal detector can be provided.
For example, when the merging portion 503 extends from the rough crushing blade 14 to a position away from the maximum length of the waste paper by the upstream side, a metal detector can be provided in the merging portion 503. In this case, the metal detectors 501C and 502D provided in the first and second branch supply paths 501 and 502 on the upstream side of the junction 503 can be omitted.

  That is, the supply path 500 includes a first branch supply path 501 and a second branch supply path 502 that are a plurality of branch supply paths that merge at the merge section 503 that is located upstream of the crushing section 12, and the merge section 503 or the merge section. A metal detection part is arrange | positioned rather than 503 at the coarse crushing part 12 side. This makes it possible to detect the metal adhering to the used paper supplied from the branch supply paths 501 and 502 before the used paper reaches the crushing blade 14, and to detect the metal in each of the branch supply paths 501 and 502. The circuit and control can be simplified.

  Further, the junction 503 may be omitted. In this case, the first and second branch supply paths 501 and 502 are configured to independently extend to the crushing unit 12. When metal is detected by the metal detectors 501C and 502D provided in the first and second branch supply paths 501 and 502, the movement of the used paper is stopped in the supply paths 501 and 502 in which the metal is detected. That is, before the used paper reaches the crushing blade 14 in each of the plurality of supply paths 501, 502, the metal is detected and the movement of the used paper is stopped.

  The above embodiment is merely a specific mode for carrying out the present invention described in the claims, and does not limit the present invention. All the configurations described in the above embodiment are essential to the present invention. It is not limited that it is a configuration requirement. Moreover, this invention is not limited to the structure of the said embodiment, In the range which does not deviate from the summary, it can be implemented in a various aspect.

  For example, 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 including a hard sheet or a stacked sheet. Further, the sheet S may be paper made of pulp or waste paper, or may be a non-woven fabric containing natural fibers or synthetic resin fibers. The properties of the sheet S are not particularly limited, and may be paper that can be used as recording paper for writing or printing (for example, so-called PPC paper), wallpaper, wrapping paper, colored paper, drawing paper, Kent paper. Etc. When the sheet S is a non-woven fabric, it may be a general non-woven fabric, a fiber board, tissue paper, kitchen paper, cleaner, filter, liquid absorbent material, sound absorber, cushioning material, mat, or the like.

Moreover, although this embodiment demonstrated the case where this invention was applied to the dry sheet manufacturing apparatus 100 which uses water as little as possible, it is not restricted to this. For example, the present invention may be applied to a sheet manufacturing apparatus that manufactures a sheet by a so-called wet method, in which a raw material containing fibers is poured into water and disassembled mainly into a mechanical action and re-made.
Moreover, in the said embodiment, although the structure which the sheet | seat S is cut by the cutting part 90 was illustrated, the structure by which the sheet | seat S processed by the sheet | seat formation part 80 is wound up by a winding roller may be sufficient.

  In addition, at least a part of the functional blocks illustrated in FIG. 2 may be realized by hardware, or may be configured by cooperation of hardware and software. The program executed by the control unit 150 may be stored in a nonvolatile storage unit or other storage device (not shown). Moreover, it is good also as a structure which acquires and runs the program memorize | stored in the external apparatus via a communication part.

  In this embodiment, the movement of the waste paper is stopped before the metal enters the crushing blade 14. However, before the waste paper reaches the crushing blade 14, the supply path is switched to another path. The structure which conveys and separates may be sufficient. For example, waste paper to which metal is attached or contained may be discharged out of the sheet manufacturing apparatus 100 or may be stored in a storage unit disposed in the sheet manufacturing apparatus 100. Further, in this case, before the metal enters the crushing blade 14, the movement of the used paper is temporarily stopped, the path is switched, the paper is transported in the reverse direction (direction toward the supply unit 10), and the used paper is discharged or stored. May be.

  2, 3, 7, 8, 23, 29, 54 ... tube, 9 ... chute, 9A, 9B ... chute wall, 10 ... supply section, 10A ... stacker, 10B ... tray, 10C ... supply section main body, 12 ... roughening , 14 ... Roughing blade, 15 ... Drive part, 16 ... Ionizer, 20 ... Defibration part, 22 ... Inlet port, 24 ... Discharge port, 26 ... Defibration part blower, 27 ... Dust collecting part, 28 ... Collection Blower 40 ... Selection part 41 ... Drum part 42 ... Introduction port 43 ... Housing part 45 ... First web forming part 46 ... Mesh belt 47 ... Stretching roller 48 ... Suction part 49 ... Rotating body , 50 ... mixing section, 52 ... additive supply section, 52a ... discharge section, 56 ... mixing blower, 60 ... deposition section, 61 ... drum section, 62 ... introduction port, 63 ... housing section, 70 ... second web forming section 72 ... Mesh belt, 74 ... Stretching roller, 7 ... Suction mechanism, 77 ... Suction blower, 79 ... Conveying section, 79a ... Mesh belt, 79b ... Stretching roller, 79c ... Suction mechanism, 80 ... Sheet forming section, 82 ... Pressure section, 84 ... Heating section, 85 ... Calendar Roller, 86 ... heating roller, 90 ... cutting unit, 92 ... first cutting unit, 94 ... second cutting unit, 96 ... discharge unit, 100 ... sheet manufacturing apparatus, 150 ... control unit, 160 ... display unit, 202, 204 , 206, 208, 210, 212 ... humidifying part, 500 ... supply path, 501 ... first branch supply path, 502 ... second branch supply path, 501A, 502A, 503A, 504A ... upper guide part, 501B, 502B, 503B, 504B ... lower guide part, 501C, 502D ... metal detection part, 502F ... wiring support part, 502A1 ... resin guide part, 502 2 ... Metal guide part, 502C, 503C, 503D, 601, 604 ... Conveying roller pair, 502E, 503E, 504C ... Paper jam detection part, 503 ... Merging part, 503F ... Paper thickness detection part, 503K ... Rotating shaft 504: downstream supply path, 602: caster, P: subdivided body, S: sheet, W1: first web, W2: second web.

Claims (11)

A crushing part for crushing the raw material with a crushing blade;
A supply unit for moving the raw material in a supply path connected to the crushing unit;
A metal detector disposed in the supply path,
The metal detector detects the metal contained in the raw material or the metal contained in the raw material before the raw material reaches the roughing blade,
The said supply part is a sheet manufacturing apparatus which stops the movement of the said raw material, when the said metal detection part detects a metal.   The sheet manufacturing apparatus according to claim 1, wherein the metal detection unit is disposed at a position separated from the roughing blade by an upstream side of the maximum length of the raw material in the supply path. It has a plurality of the supply paths, and the metal detector is disposed in each of the supply paths,
The sheet manufacturing apparatus according to claim 2, wherein the supply unit stops the movement of the raw material when any of the metal detection units detects metal.   The supply path has a plurality of branch supply paths that merge at a merging section located upstream of the crushing section, and the metal detection section is disposed closer to the crushing section than the merging section or the merging section. The sheet manufacturing apparatus according to claim 2.   The said supply part stops the movement of the said raw material, after moving the said raw material to the preset raw material removal position, when the said metal detection part detects the said metal. The sheet manufacturing apparatus according to one item.   The sheet manufacturing apparatus according to any one of claims 1 to 5, wherein the supply path includes a resin body that is positioned on an opposite side of the metal detection unit and guides the raw material. The supply unit moves a cut sheet as the raw material,
The metal detection unit is disposed at a position where the metal adhering to a rear end of the cut sheet in the moving direction of the cut sheet is detected before the cut sheet reaches the crushing blade. The sheet manufacturing apparatus according to any one of claims 1 to 6.   The sheet manufacturing apparatus according to claim 7, wherein the supply unit includes an automatic sheet feeder for the cut sheet.   The sheet manufacturing apparatus according to claim 7, wherein the supply unit includes a manual paper feeder for the cut paper.   The said metal detection part is a sheet manufacturing apparatus as described in any one of Claims 1-9 which detects the binding tool which binds the said raw material of a sheet form. A defibrating unit for defibrating the crushed material crushed by the crushing unit,
A depositing part for depositing the defibrated material defibrated in the defibrating part;
A sheet forming section for forming a sheet from the deposit deposited in the deposition section;
The sheet manufacturing apparatus according to any one of claims 1 to 10, comprising:

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