WO2018155004A1

WO2018155004A1 - Sheet processing device and sheet manufacturing device

Info

Publication number: WO2018155004A1
Application number: PCT/JP2018/000979
Authority: WO
Inventors: 谷口　誠一
Original assignee: セイコーエプソン株式会社
Priority date: 2017-02-24
Filing date: 2018-01-16
Publication date: 2018-08-30
Also published as: JP2018138279A

Abstract

In order to suppress false detection of metal due to the influence of noise, this sheet manufacturing device 100 has: a metal detection unit 440 that detects metal included in a sheet; a crushing unit 12 for shredding a sheet in which metal is not detected by the metal detection unit 440; and a metal accommodating unit 460 that accommodates a sheet in which metal is detected by the metal detection unit 440. The metal detection unit 440 and the crushing unit 12 are separated from each other by creating a space in which the metal accommodating unit 460 can be disposed therebetween, and the metal accommodating unit 460 is disposed in said space.

Description

Sheet processing apparatus and sheet manufacturing apparatus

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

Almost all metal components surrounding a rotating cutting tool, a motor for driving the cutting tool, and a transmission for coupling the motor to the cutting tool, with a device for detecting metal objects A document trimming machine is disclosed in which a device is electrically connected to each other and defined as a common potential (see Patent Document 1).

Special table 2013-506540 gazette

However, in the conventional configuration, it is not possible to sufficiently suppress erroneous metal detection due to radiation noise from a motor or the like that drives the cutting tool. In particular, the effect of radiation noise generated when the motor was controlled by an inverter was significant.
Therefore, an object of the present invention is to suppress metal false detection due to the influence of noise.

In order to achieve the above object, a sheet processing apparatus of the present invention includes a metal detection unit that detects a metal contained in a sheet, and a shredding unit that shreds the sheet from which the metal detection unit did not detect metal. The metal detection unit has a storage unit that stores a sheet in which metal is detected, and the metal detection unit and the shredded unit are spaced apart with a space in which the storage unit can be placed, The accommodating portion is disposed in the space.
According to the present invention, since the metal detection unit and the chopped part are separated from each other, erroneous metal detection due to the influence of noise from the chopped part can be suppressed. In addition, since the space between the metal detection part and the shredding part is used as an arrangement space for the accommodation part, the space can be used efficiently, which is advantageous for the overall size reduction.

Moreover, this invention has a shield member which magnetically shields at least any one of the said metal detection part and the said shredded part.
According to the present invention, it is possible to suppress the influence of noise on the metal detection unit, and to further suppress metal erroneous detection.

Moreover, this invention has a damper which reduces the vibration of at least any one of the said metal detection part and the said shredding part.
According to the present invention, vibration transmitted from the shredded portion to the metal detection portion is suppressed, and the influence on the metal detection portion due to the influence of vibration can be suppressed.

Moreover, this invention has a control part which controls to the timing which shifted the operation period of the said shredding part, and the detection period of the said metal detection part.
ADVANTAGE OF THE INVENTION According to this invention, the influence of the noise from a shredding part to a metal detection part can be suppressed effectively, and the erroneous detection of a metal can further be suppressed.

Further, in the present invention, the metal detector detects the metal contained in the sheet before the sheet reaches the blade of the shredder, and moves the sheet to the shredder, When the metal detection unit detects metal, the supply unit stops the movement of the sheet to the shredding unit.
ADVANTAGE OF THE INVENTION According to this invention, it can control appropriately so that the waste paper containing the metal does not move to a shredded part.

The present invention further includes a pickup unit that feeds the sheet into the apparatus, and the control unit performs detection by the metal detection unit when the pickup unit is not operating.
ADVANTAGE OF THE INVENTION According to this invention, the misdetection of the metal detection by the influence of the pick-up part which exists in the position near a metal detection part can be suppressed.

Moreover, this invention provides the sheet manufacturing apparatus which manufactures a new sheet | seat using the shredded material cut | disconnected by the said shredding part as a raw material.
According to the present invention, in the sheet manufacturing apparatus, it is possible to suppress erroneous metal detection due to the influence of noise from the shredded portion and to efficiently secure the arrangement space of the housing portion.

The schematic diagram which shows the structure of the sheet manufacturing apparatus which concerns on 1st Embodiment. The schematic diagram which shows a supply part and a crushing part with a periphery structure. The block diagram which shows the structure of the control system of a sheet manufacturing apparatus. The flowchart which shows the basic operation | movement of the shredding machine which consists of a supply part and a crushing part. The flowchart which shows the control in the case of sending used paper by a pick-up part. The flowchart which shows operation | movement when the old paper of shredding object is detected. The schematic diagram which shows the supply part and crushing part of 3rd Embodiment with a periphery structure. The schematic diagram which shows the supply part and crushing part of 4th Embodiment with a periphery structure. The schematic diagram which shows the supply part and crushing part of 5th Embodiment with a periphery structure.

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.

(First embodiment)
FIG. 1 is a schematic diagram illustrating a configuration of a sheet manufacturing apparatus 100 according to the first embodiment.
The sheet manufacturing apparatus 100 described in the present embodiment, for example, after used fiber (sheet), such as confidential paper as a raw material, is defibrated and fiberized by dry process, then pressurized, heated, cut, It is a suitable device for producing new paper. By mixing various additives with the fiberized raw material, the bonding strength and whiteness of paper products can be improved and functions such as color, fragrance and flame retardancy can be added according to the application. Also good. In addition, by controlling the density, thickness, and shape of the paper, it is possible to manufacture paper of various thicknesses and sizes according to the application, such as A4 or A3 office paper, business card paper, and the like.

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 conveying unit 79, a sheet forming unit 80, and a cutting unit 90 are provided.

Also, 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 the 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 vaporizer-type or hot-air vaporizer-type humidifier. That is, the

humidifying units

202, 204, 206, 208 have a filter (not shown) that partially wets the 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 (chopping unit) chops (crushes) the raw material supplied by the supply unit 10 with a crushing blade 14 to make a fine piece (crushed material). The crushing blade 14 is a blade for chopping 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 chopped across the raw material and a drive unit that rotates the crushing blades 14, and can have a configuration similar to a so-called shredder. The shape and size of the fine 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 has a chute (also referred to as a hopper) 9 that receives a fine piece that is cut by the crushing blade 14 and dropped. The chute 9 has, for example, a tapered shape whose width gradually narrows in the direction (advancing direction) of the fine pieces, and functions as a guide portion that receives and collects the fine pieces that diffuse under the crushing blade 14. . The chute 9 is connected to a tube 2 communicating with the defibrating unit 20, and the tube 2 forms a conveyance path for conveying the raw material (fine pieces) cut by the crushing blade 14 to the defibrating unit 20. To do. The fine fragments are collected by the chute 9 and transferred (conveyed) through the tube 2 to the defibrating unit 20. As a result, the tube 2 functions as a discharge part for discharging the fine fragments collected by the chute 9.

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 shredded material shredded by the coarse crushing blade 14 is attracted to the chute 9 or the inner surface of the tube 2 due to static electricity can be suppressed. Moreover, since the shredded product cut by the coarse crushing blade 14 is transferred to the defibrating unit 20 together with the humidified (high humidity) air, adhesion of the defibrated material inside the defibrating unit 20 is suppressed. The effect can also 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 chopped material cut by the crushing unit 12. More specifically, the defibrating unit 20 performs a defibrating process using the fine pieces cut by the crushing unit 12 as raw materials 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, the defibrated material includes resin (resin for binding multiple fibers), ink, toner, etc. separated from the fibers when the fibers are unwound In some cases, it may contain additives such as colorants, anti-bleeding agents, and paper strength enhancers. 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 untangled defibrated materials, or entangled with other untwisted defibrated materials. 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 torler (not shown) that rotates at high speed, and a liner (not shown) that is positioned on the outer periphery of the roller. The fine fragments 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. By this air flow, the defibrating unit 20 can suck the fine fragments as the raw material from the pipe 2 and transport 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 generator, 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 (fine fragments that have not been sufficiently defibrated), and defibrated fibers agglomerated or entangled. Including tama etc.

In this embodiment, the sorting unit 40 includes a drum unit 41 (sieving unit) and a housing unit 43 (covering unit) 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 can be 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 sorted product flowing through the tube 8 flows through the tube 2 together with the fine pieces cut by the crushing unit 12 and is guided to the introduction port 22 of the defibrating unit 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 unit 45 (separation unit) includes a mesh belt 46 (separation belt), a roller 47, and a suction unit 48 (suction mechanism). The mesh belt 46 is an endless belt, is suspended by three rollers 47, and is conveyed in the direction indicated by the arrow in the drawing by the movement of the rollers 47. The surface of the mesh belt 46 is constituted by a net in which openings of a predetermined size are arranged. Among the first selections descending from the selection unit 40, fine particles having a size that passes through the meshes fall below 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 those that are relatively small or low in density (resin particles, colorants, additives, etc.) among the defibrated materials, 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 (separation suction unit) 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 is discharged out of the sheet manufacturing apparatus 100 through an air pipe 29 discharged from the collection blower 28.

In this configuration, air is sucked from the suction part 48 through the dust collection part 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.

Therefore, 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 is humidified in the sorting unit 40 by the humidified air. This weakens the adhesion of the first selected item to the mesh belt 46 due to the electrostatic force, and facilitates the separation of the first selected item from the mesh belt 46. Furthermore, it can suppress that the 1st selection object adheres to the inner wall of the rotary body 49 or the housing part 43 with an 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 objects including relatively small ones or low density ones (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 conveyance path of the mesh belt 46, air including 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 W1 deposited on the mesh belt 46. The first web W 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 that supplies an additive containing a resin, a tube 54 that communicates with the tube 7 and through which an airflow including the subdivided body P flows, 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 in the tube 54 while mixing the subdivided body P and the additive. 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 an additive cartridge (not shown) that accumulates the additive, and supplies the additive inside the additive cartridge to the tube 54. The additive cartridge may be configured to be detachable from the additive supply unit 52. Moreover, you may provide the structure which replenishes an additive to an additive cartridge. The additive supply unit 52 temporarily stores an additive composed of fine powder or fine particles inside the additive 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. The resin contained in the additive is a thermoplastic resin or a thermosetting resin. For example, AS resin, ABS resin, polypropylene, polyethylene, polyvinyl chloride, polystyrene, acrylic resin, polyester resin, polyethylene terephthalate, polyphenylene ether, poly Butylene 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 is melted by heating to bind the plurality of fibers to each other. Accordingly, in a state where the resin is mixed with the fibers 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.

The subdivided body P descending the pipe 7 and the additive supplied by the additive supply unit 52 are sucked into the pipe 54 and pass through the inside of the mixing blower 56 due to the air flow generated by 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 deposition unit 60 deposits the defibrated material that has been 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 accumulation unit 60 includes a drum unit 61 (drum) and a housing unit 63 (covering unit) 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.

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 passing material which passed the accumulation part 60, and forms the 2nd web W2 (deposit). The 2nd web formation part 70 has the mesh belt 72 (belt), 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 2 that is soft and swelled with a lot of air 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 transport unit 79 that transports 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 stretching roller 79b, and a suction mechanism 79c.

The suction mechanism 79c includes a blower (not shown), and generates an upward airflow on the mesh belt 79a by the suction force of the blower. This air flow sucks the second web W2. Thus, the second web W2 is separated from the mesh belt 72 and is adsorbed by the mesh belt 79a. The mesh belt 79a moves by the rotation of the stretching 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 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. The pressurizing unit 82 includes a pressurizing unit driving motor 332 (FIG. 4). One of the pair of calendar rollers 85 is a driving roller driven by a pressurizing unit driving motor 332, and the other is a driven roller. The calendar roller 85 is rotated by the driving force of the pressurizing unit driving motor 332 and conveys the second web W 2 that has become dense due to 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 2 pressed by the calendar roller 85 to form the sheet S.
As described above, the second web W 2 formed by the stacking unit 60 is pressed and heated by the sheet forming unit 80 to become a sheet S.

The heating unit 84 includes a heating unit drive motor 331 (FIG. 4). One of the pair of heating rollers 86 is a driving roller driven by a heating unit driving motor 331, and the other is a driven roller. The heating roller 86 is rotated by the driving force of the heating unit driving motor 331 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 (cutter unit) cuts the sheet S formed by the sheet forming unit 80. In the present embodiment, the cutting unit 90 cuts the sheet S in a direction parallel to the conveyance direction F, and a first cutting unit 92 that cuts the sheet S in a direction that intersects with the conveyance direction of the sheet S indicated by a symbol F in the drawing. And a second cutting portion 94. 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.

Further, in the above configuration, the

humidifying units

210 and 212 may be configured by one ultrasonic humidifier or may be configured by two ultrasonic 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.

Moreover, in the said structure, although the coarse crushing part 12 cuts a raw material first and shall manufacture the sheet | seat S from the shredded raw material, the structure which manufactures the sheet | seat S using a fiber as a raw material, for example It is also possible to do.
For example, the structure which can be thrown into the drum part 41 by using the fiber equivalent to the defibrated material which the defibrating part 20 defibrated may be sufficient. Moreover, what is necessary is just to set it as the structure which can be thrown into the pipe | tube 54 by using the fiber equivalent to the 1st selection thing isolate | separated from the defibrated material as a raw material. In this case, the sheet S can be manufactured by supplying fibers processed from waste paper or pulp to the sheet manufacturing apparatus 100.

FIG. 2 is a schematic diagram showing the supply unit 10 and the crushing unit 12 together with the peripheral configuration.
The supply unit 10 and the crushing unit 12 constitute a shredder. In particular, the crushing part 12 constitutes the main part of the shredding machine. Moreover, the roughing blade 14 of the roughing unit 12 corresponds to a blade of a shredder. The crushing part 12 is surrounded by a rectangular parallelepiped casing 401 formed of sheet metal.
The housing 401 has an external insertion port 403 into which used paper is inserted. The supply unit 10 includes a pickup unit 410 that feeds used paper (indicated by reference sign PA in FIG. 2) inserted into the external insertion port 403, and a supply unit main body 430 that forms a supply path 420 connected to the crushing unit 12. And a metal detector 440 for detecting metal.

As shown in FIG. 2, the external insertion port 403 has a slit shape that opens laterally at the top of the housing 401, and used paper that is a single-size sheet of A4, A3, or the like is inserted therein. The pickup unit 410 (supply unit) includes a transport roller pair 411, and feeds used paper from the external insertion port 403 toward the supply path 420 by the transport roller pair 411. As a result, the used paper PA is supplied to the supply path 420. The transport roller pair 411 is driven by a first drive motor 331 (FIG. 3).
For example, the pickup unit 410 includes a known paper feed mechanism including a pickup roller or the like so that one or a plurality of used paper PAs placed on a tray or stacker are fed out and supplied to the supply path 420 one by one. The structure provided may be sufficient.

The supply section main body 430 includes a first supply path 421 extending in the horizontal direction from the pickup section 410 toward the opposite side of the external insertion port 403 as a supply path 420 connected to the crushing section 12, and a downstream end of the first supply path 421. And a second supply path 422 extending downward toward the crushing unit 12. The supply unit main body 430 also includes a branch supply path 423 that branches from the second supply path 422 and a branch mechanism 424 for switching the destination of the used paper from the crushing unit 12 to the branch supply path 423.

The first supply path 421 has a guide section 425 that forms a supply path extending in the horizontal direction so as to connect between the pickup section 410 and the second supply path 422. The guide unit 425 guides the used paper sent out by the pickup unit 410 to the second supply path 422. Further, the first supply path 421 is provided with a transport roller pair 426, and the used paper guided by the guide unit 425 is transported to the second supply path 422 by the transport roller pair 426.

The waste paper fed into the apparatus by the pickup unit 410 enters between the transport roller pair 426 and is transported toward the second supply path 422 by the rotation of each roller. The transport roller pair 426 is driven by a second drive motor 332 (FIG. 3).

The 2nd supply path 422 has the guide part 427 which forms the supply path extended below so that the 1st supply path 421 and the crushing part 12 may be connected. The guide unit 427 guides the used paper to the crushing unit 12. The second supply path 422 is provided with a transport roller pair 428 that transports the used paper supplied to the second supply path 422 along the guide section 427 toward the crushing section 12. The transport roller pair 428 is driven by a third drive motor 333 (FIG. 3).

Each interval (separation distance along the supply path 420) of the pickup unit 410 (conveying roller pair 411), the conveying roller pair 426, and the conveying roller pair 428 is shorter than the minimum length of the waste paper (for example, the width of A4 is 210 mm). Set to distance. As a result, the waste paper having the minimum length or more can be sequentially conveyed to the first supply path 421, the second supply path 422, and the crushing unit 12 by the conveyance roller pairs 411, 426, and 428. In addition, when the metal detection unit 440 detects metal, the used paper can be stopped before the used paper reaches the crushing blade 14 of the crushing unit 12.

Here, on the upstream side of the second supply path 422 and the downstream side of the second supply path 422, guide

rollers

431 and 432 for guiding the transport (movement) of the used paper are respectively provided. By these

guide rollers

431 and 432, the used paper is smoothly guided in the bent supply path from the first supply path 421 to the second supply path 422 and the bent supply path from the second supply path 422 to the crushing unit 12. .

The branch supply path 423 has a guide part 429 that extends from the guide part 427 of the second supply path 422 toward the lower space of the first supply path 421 downstream of the guide roller 431. A supply path that branches from the second supply path 422 is formed in the guide portion 429. This branch supply path 423 forms a supply path connected to a metal accommodating portion 460 described later.
The branching mechanism 424 has a plate-like branch switching member 424A (FIG. 3) that operates so as to be able to close the supply path by one of the guide portions at the joining portion of the

guide portions

427 and 429. By operating the branch switching member 424A, the transport destination of the used paper is switched from the crushing unit 12 to the metal housing unit 460. Note that various known configurations can be applied to the configuration of the branch supply path 423 and the branch mechanism 424.

The metal detection unit 440 detects metal in the first supply path 421 constituting the upstream portion of the supply path 420. The metal detection unit 440 is arranged with the detection surface facing the guide unit 425 of the first supply path 421 and intersects the conveyance direction so as to extend over the entire width of the used paper guided by the guide unit 425. Arranged along the direction. The metal detecting unit 440 is a magnetic field type sensor (also referred to as an electromagnetic induction type) that detects a change in a magnetic field to detect a metal adhering to the used paper or contained in the used paper. For example, an inductive proximity sensor is used for the metal detection unit 440. The metal detection unit 440 detects, for example, a binding tool such as a clip or a staple for a stapler as a metal mixed in the used paper as a raw material.

The metal detector 440 is covered with a metal case 441 (shield member) having a magnetic shield function. The metal case 441 shields the magnetic field coming from the outside and reduces the influence of the magnetic field on the metal detection unit 440. By reducing the influence of the magnetic field, the false detection of the metal detector 440 is reduced. The metal case 441 has a guide portion 425 and an opening for allowing used paper to pass through. The opening is provided with a static elimination brush that contacts the used paper and releases the charges charged on the used paper to the ground.

The crushing unit 12 includes a pair of crushing blades 14 immediately below the conveyance roller pair 428. The pair of crushing blades 14 chops waste paper conveyed downward by the conveyance roller pair 428. The crushing blade 14 has a configuration that is synchronously driven by a conveying roller pair 428 and a transmission gear near the crushing blade 14, and is driven by a third drive motor 333 (FIG. 3).

The fine pieces shredded by the coarse crushing blade 14 are accommodated in a fine piece accommodation portion 450 located therebelow. The fine piece container 450 constitutes the chute 9 shown in FIG. The crushing portion 12 is covered with a metal case 451 (shield member) having a magnetic shield function. The metal case 451 reduces noise radiated from the crushing unit 12 from a noise source such as the third drive motor 333. Since noise transmitted from the third drive motor 333 to the metal detection unit 440 is reduced, erroneous detection of the metal detection unit 440 due to the influence of this noise is reduced.

The

metal cases

441 and 451 as the shield members may be, for example, a plate shape or a net shape provided with a mesh. Moreover, it may be made of resin that is not metal but electromagnetic shield processed. The

cases

441 and 451 may be grounded with a ground wire.

By the way, since the 3rd drive motor 333 drives the crushing blade 14, a motor with a relatively large output is used, and the radiation noise from the 3rd drive motor 333 becomes relatively large. Since the magnetic field type metal detection unit 440 is easily affected by external noise, it is desirable to reduce the influence of noise from the third drive motor 333 as much as possible.
In this configuration, as shown in FIG. 2, the metal detection unit 440 and the crushing unit 12 are separated from each other in the vertical direction, and a metal is formed in a space between the metal detection unit 440 and the crushing unit 12 by being separated. An accommodating part 460 (accommodating part) is provided. Thus, the metal accommodating part 460 is arrange | positioned so that the metal detection part 440 and the crushing part 12 may be kept away.

The metal storage unit 460 stores the supply supplied via the branch supply path 423, that is, the waste paper from which metal is detected. The metal housing portion 460 is formed of, for example, a cardboard box, is supported by the housing 401, and can be easily removed from the housing 401. By this metal accommodating part 460, the waste paper in which the metal was detected can be accommodated collectively, and can be easily moved to a disposal place etc.

In this configuration, the metal detection unit 440 and the crushing unit 12 are spaced apart with a space in which the metal storage unit 460 can be placed. Thereby, the metal detection part 440 and the crushing part 12 can be spaced apart, ensuring the arrangement space of the metal accommodating part 460. FIG. By separating, the influence of the noise from the crushing part 12 to the metal detection part 440 is reduced, and the erroneous detection of the magnetic field type metal detection part 440 can be suppressed.

In addition, as shown in FIG. 2, the metal accommodating portion 460 is configured in a horizontally long box shape using the width (length in the horizontal direction) of the housing 401. As a result, it is possible to use a horizontally-long corrugated cardboard box that is widely spread as the metal accommodating portion 460, and it is easy to ensure the accommodation amount. The metal container 460 may be a box other than a cardboard box, or may be configured such that a bag body such as a plastic bag is disposed in the box body and the bag body is removed to easily move to a disposal place.
In addition, as shown in FIG. 2, the metal detection unit 440, the metal storage unit 460, and the crushing unit 12 are arranged side by side in a plan view, and the casing 401 is configured in a vertically long shape (also referred to as a vertical type). The Thereby, an area (footprint) necessary for installation of the housing 401 can be reduced.

FIG. 3 is a block diagram showing the configuration of the control system of the sheet manufacturing apparatus 100.
The sheet manufacturing apparatus 100 includes a control device 110 having a main processor 111 that controls each unit of the sheet manufacturing apparatus 100.
The control device 110 includes a main processor 111, a ROM (Read Only Memory) 112, and a RAM (Random Access Memory) 113. The main processor 111 is an arithmetic processing unit such as a CPU (Central Processing Unit), and controls each part of the sheet manufacturing apparatus 100 by executing a basic control program stored in the ROM 112. The main processor 111 may be configured as a system chip including peripheral circuits such as the ROM 112 and the RAM 113 and other IP cores.

The ROM 112 stores a program executed by the main processor 111 in a nonvolatile manner. The RAM 113 forms a work area used by the main processor 111 and temporarily stores programs executed by the main processor 111 and data to be processed.

The nonvolatile storage unit 120 stores a program executed by the main processor 111 and data processed by the main processor 111. The nonvolatile storage unit 120 stores, for example, setting data 121 and display data 122. The setting data 121 includes data for setting the operation of the sheet manufacturing apparatus 100. For example, the setting data 121 includes data such as characteristics of various sensors included in the sheet manufacturing apparatus 100 and threshold values used in processing in which the main processor 111 detects an abnormality based on detection values of the various sensors.
The display data 122 is screen data that the main processor 111 displays on the display panel 116 (FIG. 4). The display data 122 is data for displaying, for example, the operation state of the sheet manufacturing apparatus 100, various set values, warning display, and the like. The display data 122 may be fixed image data, or data for setting a screen display for displaying data generated or acquired by the main processor 111.

Touch sensor 117 detects a touch (contact) operation or a press operation. The touch sensor 117 is composed of, for example, a pressure sensing type or capacitance type sensor having a transparent electrode, and is arranged on the display surface of the display panel 116. When the touch sensor 117 detects an operation, the touch sensor 117 outputs operation data including the operation position and the number of operation positions to the main processor 111. The main processor 111 detects an operation on the display panel 116 based on the output of the touch sensor 117 and acquires an operation position. The main processor 111 realizes a GUI (Graphical User Interface) operation based on the operation position detected by the touch sensor 117 and the display data 122 being displayed on the display panel 116.

The control device 110 is connected to a sensor installed in each part of the sheet manufacturing apparatus 100 via a sensor I / F (Interface) 114. The sensor I / F 114 is an interface that acquires a detection value output from the sensor and inputs the detection value to the main processor 111. The sensor I / F 114 may include an analog / digital (A / D) converter that converts an analog signal output from the sensor into digital data. The sensor I / F 114 may supply a drive current to each sensor. Further, the sensor I / F 114 may include a circuit that acquires the output value of each sensor according to the sampling frequency specified by the main processor 111 and outputs the acquired value to the main processor 111.

The sensor I / F 114 is connected to a used paper remaining amount sensor 301, a paper discharge sensor 303, a metal detection unit 440, a used paper detection sensor 304, and a metal piece detection sensor 305.

The used paper remaining amount sensor 301 detects the remaining amount of used paper that is the raw material of the sheet S. For example, the used paper remaining amount sensor 301 detects the remaining amount of fine fragments in the fine fragment accommodation unit 450. For example, when the remaining amount of used paper detected by the used paper remaining amount sensor 301 falls below a set value, the control device 110 notifies the shortage of used paper.
The paper discharge sensor 303 detects the amount of sheets S accumulated in the tray or stacker included in the discharge unit 96. The control device 110 performs notification when the amount of the sheet S detected by the paper discharge sensor 303 is equal to or greater than a predetermined upper limit value or less than a predetermined lower limit value.

When the metal detection unit 440 detects the metal contained in the used paper transported by the supply unit 10, the control device 110 operates the branch switching member 424 A by the branch mechanism 424, and the used paper whose metal is detected is moved to the metal storage unit 460. To accommodate.
A used paper detection sensor 304 (a shredding object detection unit) detects whether or not a used paper that is a shredding object exists. For example, the used paper detection sensor 304 detects whether there is used paper immediately before the crushing unit 12 by detecting the presence or absence of used paper in the second supply path 422. When the used paper detection sensor 304 detects used paper, the control device 110 activates the crushing unit 12.

The metal piece detection sensor 305 (metal piece detection unit) detects the accumulated amount of metal pieces (used paper in which metal is detected) stored in the metal storage unit 460. For example, when the accumulated amount of the metal piece detected by the metal piece detection sensor 305 exceeds a set value, the control device 110 notifies the removal of the metal piece.

These are examples, and for example, the sheet manufacturing apparatus 100 may have other sensors, and the control device 110 may be able to acquire the detection values of these sensors. For example, the sheet manufacturing apparatus 100 includes a sensor that detects the remaining amount of additive in the additive supply unit 52, a sensor that detects the amount of water in a tank (not shown) in which the sheet manufacturing apparatus 100 stores humidification water, and the like. May be. In addition, the sheet manufacturing apparatus 100 may include a sensor that detects the temperature, the air volume, and the wind speed of the air flowing inside the sheet manufacturing apparatus 100.

The control device 110 is connected to each drive unit included in the sheet manufacturing apparatus 100 via a drive unit I / F (Interface) 115. The drive part with which the sheet manufacturing apparatus 100 is provided is a motor, a pump, a heater, etc.

The drive unit I / F 115 includes a first drive motor 331, a second drive motor 332, a third drive motor 333, and a branch mechanism for operating the supply unit 10 and the crushing unit 12 as control targets of the control device 110, respectively. 424 is connected.

The first to third drive motors 331 to 333 are connected to the drive unit I / F 115 via drive ICs (Integrated Circuits) 321 to 323. The control device 110 controls the start and stop of the rotation of the first to third drive motors 331 that are paper feed motors of the supply unit 10. Thus, the used paper is fed out to the supply path 420, the used paper is conveyed in the supply path 420, and the conveyance is stopped. The drive ICs 321 to 323 may include detection units such as a rotary encoder and a rotation angle sensor that detect the rotation amounts and rotation angles of the motors 331 to 333.
Further, the control device 110 controls the branch mechanism 424 to switch the transport destination of the used paper as the raw material to the crushing unit 12 or the metal storage unit 460.

In addition, the defibrating unit 20, the additive supply unit 52, the blower 315, the humidifying unit 316, the drum driving unit 317, the belt driving unit 318, and the dividing unit 319 are connected to the driving unit I / F 115.
The defibrating unit 20 includes a drive unit such as a motor that rotates a rotor (not shown) included in the defibrating unit 20. The additive supply unit 52 includes a motor that drives a screw feeder that feeds the additive in the discharge unit 52a, and a drive unit such as a motor and an actuator that opens and closes the discharge unit 52a. The blower 315 includes a defibrating unit blower 26, a collection blower 28, a mixing blower 56, a suction blower 77, and the like. Each of these blowers may be individually connected to the drive unit I / F 115. The humidifying unit 316 includes

humidifying units

202, 204, 206, 208, 210, 212 and the like.

The drum driving unit 317 includes a driving unit such as a motor that rotates the drum unit 41. The belt driving unit 318 includes driving units such as a motor that drives the mesh belt 46 and a motor that drives the mesh belt 72.
The dividing unit 319 includes a driving unit such as a motor that rotates the rotating body 49. In addition, a heater, a vaporizing humidifier, a mist humidifier, or the like that heats the heating roller 86 may be connected to the driving unit I / F 115. Moreover, you may connect the water supply pump which supplies water to each humidifier to the drive part I / F115.

Further, a heating unit driving motor 334, a pressurizing unit driving motor 335, a cutter driving motor 338, and a cutter driving motor 339 are connected to the driving unit I / F 115.
The heating unit driving motor 334 is connected to the driving unit I / F 115 via the driving IC 324 and drives the heating roller 86 of the heating unit 84. The control device 110 controls the start, stop, and rotation speed of the heating unit drive motor 334.

The pressure unit drive motor 335 is connected to the drive unit I / F 115 via the drive IC 325 and drives the calendar roller 85 of the pressure unit 82. The control device 110 controls the start, stop, and rotation speed of the pressurizing unit drive motor 335. The drive ICs 324 and 325 may include detection units such as a rotary encoder and a rotation angle sensor that detect the rotation amount and rotation angle of each

motor

334 and 335.

The

cutter drive motors

338 and 339 are connected to the drive unit I / F 115 via the

drive ICs

328 and 329, and drive the cutters provided in the first cutting unit 92 and the second cutting unit 94, respectively. The control device 110 controls the start and stop of the rotation of the cutter drive motor 338 and the cutter drive motor 339.

The drive ICs 321 to 329 are circuits that supply a drive current to the drive unit according to the control of the main processor 111, and are composed of power semiconductor elements and the like. For example, the drive ICs 321 to 329 are inverter circuits or drive circuits that drive stepping motors. Specific configurations and specifications of the drive ICs 321 to 329 are appropriately selected according to the drive units to be connected. Further, the configuration of each motor constituting the sheet manufacturing apparatus 100 is not particularly limited.

FIG. 4 is a flowchart showing the basic operation of the shredder composed of the supply unit 10 and the crushing unit 12.
The control device 110 can start the operation shown in FIG. 4 after the sheet manufacturing apparatus 100 is turned on and the startup sequence is executed. As illustrated in FIG. 4, when the shredding instruction is input (step S1A), the control device 110 starts control related to shredding (step S2A). The shredding instruction is performed when shredding is instructed via the touch sensor 117 or the like, when the used paper remaining amount sensor 301 falls below a predetermined value, or when shredding is instructed from an external device, etc. Is input. The conditions for issuing the shredding instruction may be set as appropriate.

The control related to shredding includes the control of the supply unit 10 and the control of the crushing unit 12, that is, the control device 110 controls the first to third drive motors 331 to 333 to control the feeding of used paper. Shred the used paper. The control device 110 also performs metal detection by the metal detection unit 440. That is, the control device 110 performs paper feeding, metal detection, and shredding.
Regarding the used paper shredding, the control device 110 drives the third drive motor 333 when the used paper detection sensor 304 detects the used paper that is the shredded object, thereby cutting the used paper to be shredded. I refuse. In the case where the used paper detection sensor 304 is not provided, the third drive motor 333 or the like may be driven so as to shred the used paper sent out by the pickup unit 410.

The control device 110 determines whether or not to end the control related to shredding (step S3A), and stops the control when the control ends (step S4A). When the control is terminated, when shredding stop is instructed via the touch sensor 117 or the like, when the used paper remaining amount sensor 301 exceeds a predetermined value, the metal piece detecting sensor 305 causes the metal storage unit For example, when the remaining amount of metal pieces in 460 exceeds a predetermined value, or when shredding stop is instructed from an external device. In addition, what is necessary is just to set the conditions which complete | finish the control regarding shredding suitably.

FIG. 5 is a flowchart showing control when used paper is fed by the pickup unit 410. As a premise, when the used paper is detected by the used paper detection sensor 304, the control device 110 drives the second and

third drive motors

332 and 333, and the detected used paper is shredded preferentially.
When the used paper is fed into the supply path 420 by the pickup unit 410, the control device 110 determines whether or not the used paper is being shredded by driving the third drive motor 331 (denoted as “in shredding”). (Step S1B). For example, when there is waste paper sent out immediately before by the pickup unit 410 and the waste paper is shredded, it is determined that shredding is in progress.

When the used paper is being shredded, the control device 110 stops the used paper feeding by the pickup unit 410 and controls the state to “waiting for paper feeding” (step S2B). Thereafter, the control device 110 waits until shredding of used paper stops (step S3B: NO). When the shredding of used paper stops (step S3B: YES), the control device 110 starts paper feeding by the first drive motor 331 (step S4B) and starts metal detection by the metal detection unit 440 (step S5B). .

When the metal is detected (step S6B: YES), the control device 110 operates the branch mechanism 424 (step S7B), and proceeds to the next step S8B. By the operation of the branching mechanism 424, the transport destination of the used paper in which the metal is detected is switched to the metal storage unit 460.

On the other hand, if no metal is detected (step S6B: NO), the control device 110 proceeds to the process of step S7B. In step S 8 B, the control device 110 moves the used paper to the position of the transport roller pair 426 driven by the second drive motor 332 by the first drive motor 331, and then finishes the paper feed by the first drive motor 331. . Thereby, when the transport destination of the used paper is the metal storage unit 460, the used paper is stored in the metal storage unit 460, and in other cases, the used paper is transported to the crushing unit 12.

When the branching mechanism 424 is not operated, the second drive motor 332 is driven to convey the used paper toward the crushing unit 12. In this case, the used paper detection sensor 304 detects used paper immediately before the crushing unit 12, the controller 110 drives the third drive motor 333, and shredding is performed.

As described above, when the waste paper is being shredded, the metal detection unit 440 does not detect the metal, and therefore, the operation period of the crushing unit 12 and the detection period of the metal detection unit 440 can be controlled at different timings. . While the crushing unit 12 is not in operation, the third drive motor 333 is not driven and does not become a noise source, so that erroneous detection of the metal detection unit 440 due to the influence of noise from the crushing unit 12 can be avoided. Thereby, the detection accuracy can be effectively increased.

As described above, the sheet manufacturing apparatus 100 according to this embodiment includes a metal detection unit 440 that detects metal contained in used paper that is a sheet, and shreds (roughly cuts used paper that the metal detection unit 440 did not detect metal). Crushing portion 12 (shredded portion). Furthermore, the sheet manufacturing apparatus 100 includes a metal storage unit 460 that stores used paper whose metal is detected by the metal detection unit 440. The metal detection unit 440 and the crushing unit 12 are spaced apart from each other with a space in which the metal storage unit 460 can be disposed, and the metal storage unit 460 is disposed in this space. According to this configuration, since the metal detection unit 440 and the crushing unit 12 are separated from each other, erroneous metal detection due to the influence of noise from the crushing unit 12 is suppressed. Moreover, since the space between the metal detection part 440 and the crushing part 12 is used as the arrangement space for the metal accommodating part 460, the space can be used efficiently, which is advantageous for overall downsizing.

Moreover, since the metal detection unit 440 is magnetically shielded by the metal case 441, the influence of external noise including the crushing unit 12 on the metal detection unit 440 is suppressed. Furthermore, since the crushing part 12 is magnetically shielded by the metal case 451, noise itself affecting the metal detection part 440 from the crushing part 12 is also suppressed. As a result, metal erroneous detection due to the influence of noise is further suppressed.

In addition, it is not limited to the structure which magnetically shields both the metal detection part 440 and the crushing part 12, The structure by which at least any one is magnetically shielded may be sufficient. Even in this case, the influence of noise from the crushing unit 12 to the metal detection unit 440 can be efficiently suppressed.
In addition, when the influence of noise on the metal detection unit 440 is sufficiently suppressed by ensuring a sufficient distance between the metal detection unit 440 and the crushing unit 12, the magnetic shield may be omitted.

In addition, the sheet manufacturing apparatus 100 includes a control device 110 (control unit) that controls the operation period of the crushing unit 12 and the detection period of the metal detection unit 440 at different timings. Since the crushing unit 12 does not operate during the detection period of the metal detection unit 440, erroneous detection of the metal detection unit 440 can be further suppressed.
In addition, when the influence of noise on the metal detection unit 440 is sufficiently suppressed by ensuring a sufficient distance between the metal detection unit 440 and the crushing unit 12, the operation period of the crushing unit 12 and the metal There is no need to perform processing to control at a timing shifted from the detection period of the detection unit 440.

Further, the metal detection unit 440 detects the metal contained in the used paper before the used paper reaches the crushing blade 14 of the crushing unit 12. The sheet manufacturing apparatus 100 includes a supply unit main body 430 that forms a supply path 420 connected to the crushing unit 12. The supply unit main body 430 moves the used paper to the crushing unit 12 under the control of the control device 110, and stops the conveyance of the used paper to the crushing unit 12 when the metal detection unit 440 detects the metal. According to this configuration, it is possible to appropriately control the waste paper containing the metal so as not to move to the crushing unit 12. By these, a metal moves to the coarse crushing part 12, and it is suppressed that the quality of the manufactured sheet | seat S is deteriorated.

(Second Embodiment)
In the first embodiment, the operation of the crushing unit 12 is prioritized and the case where metal detection is not performed during the operation of the crushing unit 12 has been described. However, in the second embodiment, metal detection is prioritized and metal detection is performed. The difference is that the operation of the crushing unit 12 is stopped. In the second embodiment and each embodiment described later, the same components as those in the first embodiment are denoted by the same reference numerals, and different parts will be described.
FIG. 6 is a flowchart showing the operation when the used paper detection sensor 304 detects used paper to be shredded. In the second embodiment, control is performed in which waste paper is fed by the pickup unit 410, metal detection is performed by the metal detection unit 440, and the waste paper from which metal is detected is delivered to the metal storage unit 460.

As shown in FIG. 6, the control device 110 determines whether or not metal detection is being performed by the metal detection unit 440 (step S1C). When the metal is being detected (step S1C: YES), the control device 110 turns off the shredding permission flag and sets a prohibition state in which shredding by the crushing unit 12 is prohibited (step S2C). In this case, the control device 110 does not drive the third drive motor 333 and waits until the metal detection is completed (step S3C).

However, the first and

second drive motors

331 and 332 are appropriately driven in order to perform metal detection over the entire waste paper. Further, the used paper on which metal detection has been completed is placed on standby between the transport roller pair 426 and the transport roller pair 428 in the supply path 420 during the prohibited state. In this embodiment, a space between the conveyance roller pair 426 and the guide roller 432 on the downstream side of the second supply path 422 is used as a standby area for used paper.

When the metal detection is not in progress (step S1C: NO), or when the metal detection is completed (step S3C: YES), the control device 110 turns on the shredding permission flag and permits the shredding by the crushing unit 12 A state is set (step S4C). In the permitted state, when the used paper detection sensor 304 detects used paper to be shredded, the control device 110 drives the third drive motor 333 and executes shredding by the crushing unit 12 (step S5C). For example, the used paper detection sensor 304 detects used paper existing in a used paper standby area.

Thus, since the shredding by the crushing unit 12 is not performed during metal detection, the operation period of the crushing unit 12 and the detection period of the metal detecting unit 440 can be controlled to be shifted. Therefore, the influence of noise from the crushing unit 12 to the metal detection unit 440 can be suppressed to almost zero, and erroneous metal detection can be further suppressed.

(Third embodiment)
FIG. 7 is a schematic diagram showing the supply unit 10 and the crushing unit 12 of the third embodiment together with the peripheral configuration. The third embodiment is different from the first embodiment in the layout of the supply path 420.
As shown in FIG. 7, the external insertion port 403 is provided on the upper surface of the housing 401, and a first supply path 421 that configures an upstream portion of the supply path 420 extends downward from the external insertion port 403. . Further, the second supply path 422 constituting the downstream portion of the supply path 420 extends downward from the downstream end of the first supply path 421 and is connected to the crushing unit 12.
The metal detection unit 440 is disposed on the side of the first supply path 421 (on the left side in FIG. 7), extends over the entire width of the used paper guided by the first supply path 421, and detects the metal contained in the used paper. To do.

In this configuration, the first and

second supply paths

421 and 422 constituting the supply path 420 are open in the side of the metal detection unit 440 and the metal storage unit 460 (right side in FIG. 7) in the housing 401. Be placed. According to this configuration, compared to a configuration (see FIG. 2) in which the supply path 420 is disposed in a space between the lower side of the metal detection unit 440 and the upper side of the metal housing unit 460, the necessary space for the supply path 420 is reduced. It becomes easy to make it smaller.
When supplying waste paper from above the housing 401, or when the space between the lower part of the metal detection part 440 and the upper part of the metal housing part 460 is narrow, the supply path 420 is arranged as shown in FIG. Is preferred. Even in this configuration, the casing 401 has a vertically long shape (also referred to as a vertical type), and various effects similar to those in the first embodiment such as the floor area required for installation can be efficiently reduced.

In this case, since the 1st supply path 421 is not arranged in the space between the lower part of metal detection part 440 and the upper part of metal storage part 460, it is the 1st supply compared with the composition (Drawing 2) of a 1st embodiment. The path 421 can be shortened, and the supply path 420 can be easily shortened. In this configuration, due to the shortening of the supply path 420, the transport roller pair 426 and the second drive motor 332 (FIG. 3) in the first embodiment are omitted.

(Fourth embodiment)
FIG. 8 is a schematic diagram showing the supply unit 10 and the crushing unit 12 of the fourth embodiment together with the peripheral configuration.
In the fourth embodiment, the housing 401 is a horizontally long type (also referred to as a horizontal type), and an external insertion port 403 into which used paper is inserted is provided on the side surface of one side of the housing 401 in the horizontal direction. A metal detection unit 440 is provided adjacent to 403. Further, the crushing portion 12 is provided on the other horizontal side in the housing 401.
In addition, the metal detection unit 440 is provided to be offset from one side in the horizontal direction and above the crushing unit 12. Thus, an arrangement space for the metal accommodating portion 460 is provided below the metal detecting portion 440 and on one side of the crushing portion 12 in the horizontal direction. The metal accommodating portion 460 includes the metal detecting portion 440 and the roughly crushed portion. 12 is arranged so as to be away from 12.

The supply unit main body 430 includes a first supply path 421 extending in the horizontal direction from the external insertion port 403 toward the opposite side of the external insertion port 403, and a second supply path 422 extending in the horizontal direction from the downstream end of the first supply path 421. And have. The downstream end of the second supply path 422 is connected to the crushing unit 12.

A supply path 420 including first and

second supply paths

421 and 422 extends in the horizontal direction from the metal detection unit 440 to the crushing unit 12, and includes an upstream conveyance roller pair 426 and a downstream conveyance roller pair 428. A third transport roller pair 465 is provided at a substantially intermediate position between the first and second rollers. The transport roller pair 465 has substantially the same configuration as the

transport roller pair

426, 428, and is driven by a fourth drive motor (not shown).

The intervals (separation distances) between the pickup unit 410 (conveying roller pair 411) and the conveying roller pairs 426, 465, and 428 are set to be shorter than the minimum length of the waste paper (for example, the width of A4 is 210 mm). . With the above configuration, when the metal detection unit 440 detects a metal, the used paper can be stopped before the used paper reaches the crushing blade 14 of the crushing unit 12.

Also in this configuration, the metal detection unit 440 and the crushing unit 12 are spaced apart from each other with a space in which the metal storage unit 460 can be disposed, and the metal storage unit 460 is disposed in this space. The same effect as the form can be obtained.
Moreover, the metal accommodating part 460 is arranged side by side with the metal detection part 440 in a plan view, and the crushing part 12 is arranged laterally with respect to the metal detection part 440 and the metal accommodation part 460 instead of the vertical direction. Therefore, it is possible to configure the casing 401 to have a thin shape with a short vertical length (height).

(Fifth embodiment)
FIG. 9 is a schematic view showing the supply unit 10 and the crushing unit 12 of the fifth embodiment together with the peripheral configuration. The fifth embodiment is different from the first embodiment in that a vibration isolating member is provided.
As shown in FIG. 9, a damper 501 that suppresses vibration of the metal detection unit 440 and a damper 502 that suppresses vibration of the crushing unit 12 are disposed in the housing 401.
The damper 501 also serves as a support member that supports the metal case 441 that covers the metal detection unit 440, and has a damping material or a damping structure that suppresses transmission of vibration from the outside to the metal case 441.

The damper 502 also serves as a support member that supports the crushing portion 12 and has a damping material or a damping structure that suppresses transmission of vibrations generated when the crushing blade 14 is shredded to the outside. For example, the

dampers

501 and 502 are made of a known vibration-proof material such as a gel-like sheet made mainly of low-resilience urethane, sponge, gel, or silicone.

In this configuration, the entire crushing part 12 is not covered with the metal case 451, but only the part of the crushing part 12 that serves as a noise source and a vibration source (for example, the crushing blade 14, the transport roller pair 428, and the first part). The configuration including the three drive motors 333 is covered with a metal case 451. Only the metal case 451 is supported by the damper 502. According to this configuration, an appropriate damper 502 can be selected in accordance with the noise source and the vibration source, the support load required for the damper 502 is reduced, and the damper 502 can be easily selected or adjusted. Moreover, it becomes easy to employ a small damper 502.

According to the above configuration, the vibrations transmitted from the crushing unit 212 to the metal detecting unit 440 are suppressed by the

dampers

501 and 502. By suppressing the vibration, it is possible to effectively suppress an increase in the change in the magnetic field that affects the metal detection unit 440 from the crushing unit 12 due to the vibration. Thereby, the erroneous detection of a metal can be suppressed more.

The above-described embodiments are merely specific embodiments for carrying out the present invention described in the claims, and are not intended to limit the present invention. All the configurations described in the embodiments are all within the scope of the present invention. It is not limited that it is an essential component requirement. The present invention is not limited to the configuration of each embodiment, and can be implemented in various modes without departing from the spirit of the invention.

For example, in each embodiment, the control device 110 may perform control so that metal detection by the metal detection unit 440 is performed when the pickup unit 410 is not operating. According to this configuration, it is possible to suppress erroneous detection of metal detection due to the influence of noise from the pickup unit 410 located near the metal detection unit 440. That is, it is possible to suppress the influence of a noise source that is present at a position close to the metal detection unit 440 and increase the accuracy of metal detection.

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 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 each embodiment demonstrated the case where this invention was applied to the dry sheet manufacturing apparatus 100 which does not use water as much 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, each embodiment is not limited to a configuration in which waste paper is shredded and accommodated in the fine piece accommodation unit 450. The target to be shredded is not limited to waste paper, but may be a device that shreds recording media, cards, and the like using synthetic resin, for example. Moreover, you may provide the conveying apparatus which conveys a fine fragment to the exterior of the crushing part 12, and it can change arbitrarily also about another structure.

Also, at least a part of the functional blocks shown in FIG. 3 may be realized by hardware, or may be realized by cooperation of hardware and software, and independent as shown in the figure. The configuration is not limited to the arrangement of the hardware resources. The program to be executed 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 the first, fourth, and fifth embodiments, the metal detection unit 440 is disposed on the upper side of the first supply path 421. However, the metal detection unit 440 is disposed on the lower side of the first supply path 421 (on the metal accommodating unit 460 side). May be.

In addition, although the case where a magnetic field type sensor is used for the metal detection unit 440 has been described, a sensor other than the magnetic field type may be used. Even when a sensor other than the magnetic field type is used, false detection can be suppressed by suppressing the influence of noise. Further, although the case where the present invention is applied to the sheet manufacturing apparatus 100 has been described, the present invention is not limited thereto, and can be widely applied to a sheet processing apparatus having a metal detection function and a shredding function. For example, the present invention can be applied to a shredder.

2, 3, 7, 8, 23, 29 ... pipe, 9 ... chute, 10 ... supply part, 12 ... roughening part (chopping part), 14 ... roughing blade, 20 ... defibrating part, 22 ... introduction port , 24 ... discharge port, 26 ... defibration unit blower, 27 ... dust collection unit, 28 ... collection blower, 40 ... selection unit, 41 ... drum unit, 42 ... introduction port, 43 ... housing unit, 44 ... discharge port, 45 ... 1st web formation part, 46 ... Mesh belt, 47 ... Roller, 48 ... Suction part, 49 ... Rotating body, 50 ... Mixing part, 52 ... Additive supply part, 52a ... Discharge part, 54 ... Pipe, 56 ... Mixing blower 60 ... deposition part 61 ... drum part 62 ... introduction port 63 ... housing part 70 ... second web forming part 72 ... mesh belt 74,911 ... roller 76 ... suction mechanism 77 ... suction Blower, 79 ... Conveying section, 79a ... Mesh belt, 9b ... tension roller, 79c ... suction mechanism, 80 ... sheet forming part, 82 ... pressure part, 84 ... heating part, 85 ... calendar roller, 86 ... heating roller, 90 ... cutting part, 92 ... first cutting part, 94: second cutting unit, 96: discharge unit, 100: sheet manufacturing apparatus, 110: control device (control unit), 111: main processor, 112: ROM, 113: RAM, 114: sensor I / F, 115: driving Part I / F, 120 ... Nonvolatile storage part, 121 ... Setting data, 140 ... Storage part, 202, 204, 206, 208, 210, 212 ... Humidifying part, 301 ... Used paper remaining amount sensor, 303 ... Paper discharge sensor, 304 ... used paper detection sensor, 305 ... metal piece detection sensor, 315 ... blower, 316 ... humidification unit, 317 ... drum drive unit, 318 ... belt drive unit, 319 ... 321 to 325, 328, 329 ... driving IC, 331 ... first driving motor, 332 ... second driving motor, 333 ... third driving motor, 334 ... heating unit driving motor, 335 ... pressurizing unit driving motor, 338, 339: Cutter drive motor, 401: Housing, 403: External insertion port, 410: Pickup unit, 411, 426, 428, 465 ... Conveying roller pair, 420 ... Supply path, 421 ... First supply path, 422 ... Second supply path, 423 ... branch supply path, 424 ... branch mechanism, 424A ... branch switching member, 425, 427, 429 ... guide section, 430 ... supply section main body, 431, 432 ... guide roller, 440 ... metal detection section, 441, 451 ... Metal case (shielding member), 450 ... Fine fragment housing part, 460 ... Metal housing part (housing part), 501, 502 ... Dunn Par, P ... subdivision, S ... sheet, PA ... used paper, V1, V2 ... speed, W1 ... first web, W2 ... second web.

Claims

A metal detector for detecting metal contained in the sheet;
A shredder that shreds the sheet from which the metal detector did not detect metal;
A housing portion for housing the sheet in which the metal detection portion has detected the metal,
The metal detection unit and the shredding unit are spaced apart from each other with a space in which the storage unit can be disposed, and the storage unit is disposed in the space.
The sheet processing apparatus according to claim 1, further comprising a shield member that magnetically shields at least one of the metal detection unit and the shredded unit.
The sheet processing apparatus according to claim 1 or 2, further comprising a damper that reduces vibrations of at least one of the metal detection unit and the shredding unit.
The sheet processing apparatus according to any one of claims 1 to 3, further comprising a control unit that controls the operation period of the shredding unit and the detection period of the metal detection unit at different timings.
The metal detector detects the metal contained in the sheet before the sheet reaches the blade of the shredded part,
5. The apparatus according to claim 1, further comprising a supply unit that moves the sheet to the shredding unit and stops the movement of the sheet to the shredding unit when the metal detection unit detects metal. The sheet processing apparatus according to item.
A pickup unit for feeding the sheet into the apparatus;
The sheet processing apparatus according to claim 4, wherein the control unit performs detection by the metal detection unit when the pickup unit is not operating.
The sheet processing apparatus according to any one of claims 1 to 6, comprising:
The sheet manufacturing apparatus which manufactures a new sheet | seat using the shredded material cut | judged by the said shredding part as a raw material.