JP2018086701A - Sheet manufacturing apparatus and control method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately cut a web even when a speed of a roller conveying the web changes in a sheet manufacturing apparatus.SOLUTION: A sheet manufacturing apparatus 100 includes: a deposition section 60 depositing a material containing fibers and resin; a calender roller 85 conveying a second web W2 deposited by the deposition section 60; a heating roller 86 being positioned closer to a downstream side in a conveyance direction F than the calender roller 85 and conveying the second web W2; a first cutting section 92 being positioned closer to a downstream side in the conveyance direction F than the heating roller 86 and cutting a sheet S while moving a cutting position in a direction intersecting with the conveyance direction F; and a control section. The control section controls a speed of cutting operation by the first cutting section 92 according to a speed of the heating roller 86.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sheet manufacturing apparatus and a control method for the sheet manufacturing apparatus.

  2. Description of the Related Art Conventionally, in a sheet manufacturing apparatus, a configuration including a cutting unit that cuts a web, a roller before a cutting unit that transports the web, and a roller after a cutting unit is known (see, for example, Patent Document 1). The sheet manufacturing apparatus described in Patent Literature 1 controls the rotation speed of the roller in front of the cutting unit in accordance with the sagging of the web, thereby controlling the sagging.

Japanese Patent Laying-Open No. 2015-074857

In the conventional configuration described above, by changing the rotation speed of the roller that conveys the web, the operation of the cutting unit cutting the web is affected, and the cut surface of the web may be disturbed.
An object of this invention is to cut | disconnect a web appropriately even if it is a case where the speed of the roller which conveys a web in a sheet manufacturing apparatus changes.

In order to solve the above-described problems, the present invention provides a web forming unit that forms at least a web on which fibers are deposited, a first transport roller that transports the web, and a transport direction of the web relative to the first transport roller. A second conveyance roller that is located on the downstream side, conveys the web, and is located on the downstream side in the conveyance direction of the web with respect to the second conveyance roller, and the web is in a direction that intersects the conveyance direction of the web. A cutting unit that cuts while moving a cutting position; and a control unit that controls the first and second transport rollers and the cutting unit, the control unit depending on a speed of the second transport roller. Then, the speed of the cutting operation by the cutting unit is controlled.
According to this invention, even if it is a case where the speed of a 2nd conveyance roller changes, a web can be cut | disconnected appropriately by a cutting part, and disorder of a cut surface can be prevented or suppressed.

Moreover, in this invention, the said control part performs the control which sags the said web between said 1st conveyance rollers by adjusting the speed of a said 2nd conveyance roller.
According to the present invention, since the web is slackened by adjusting the speed of the second conveying roller, unintended breakage of the web can be prevented.

Further, the present invention is located at a downstream side in the web transport direction with respect to the web forming unit that forms at least a web on which fibers are deposited, the first transport roller that transports the web, and the first transport roller. A second transport roller for transporting the web, a third transport roller for transporting the web, located on the downstream side of the second transport roller in the web transport direction, the second transport roller, and the second transport roller. A cutter that cuts the web while moving a cutting position in a direction that intersects the web conveyance direction with the three conveyance rollers, and a controller that controls the second and third conveyance rollers and the cutter. The control unit adjusts the sag of the web with the first transport roller by controlling the speed of the second transport roller. Control the speed of the third transport roller in accordance with the speed of the second conveying roller, and controls the speed of the cutting operation by the cutter according to the speed of the third conveying roller.
According to this invention, even if it is a case where the speed of a 2nd conveyance roller is changed in order to adjust the slack of a web, the speed of a 3rd conveyance roller is changed according to the speed of a 2nd conveyance roller, and 3rd conveyance Since the speed of the cutting operation of the cutter is changed according to the speed of the roller, it is possible to appropriately cut the web and prevent or suppress disturbance of the cut surface of the web.

Moreover, in this invention, the said control part maintains the speed of a said 3rd conveyance roller, while cut | disconnecting the said web with the said cutter.
According to the present invention, since the speed of the third conveying roller is maintained while the web is cut, the disruption of the cut surface can be more reliably prevented or suppressed.

Moreover, in this invention, the said control part maintains the speed of a said 2nd conveyance roller during the period including the time when the said cutter cut | disconnects the said web, and before the said cutter starts the cutting | disconnection of the said web. .
In this case, the speed of the third transport roller is also maintained by maintaining the speed of the second transport roller.
According to the present invention, the speed of the second transport roller is stabilized before the web is cut, and the speed of the third roller is maintained during the cutting, so that the disturbance of the cut surface of the web can be prevented or suppressed more reliably. .

Moreover, in this invention, the said control part changes the speed of a said 2nd conveyance roller in the predetermined period after cut | disconnecting the said web with the said cutter.
According to the present invention, by avoiding the timing at which the cutter cuts the web, the cut surface can be prevented from being disturbed, and the slack of the web can be adjusted by changing the speed of the second transport roller.

In the present invention, the predetermined period is a period during which the third conveying roller conveys the web for a predetermined length.
According to the present invention, the speed of the second transport roller can be changed in accordance with a period during which the timing at which the cutter cuts the web can be avoided with reference to the length of the web transport.

In the present invention, the cutter includes a fixed shaft and a cutting blade provided on the shaft, and cuts the web by rotating the cutter around the shaft corresponding to the transport direction. The control unit controls the rotation speed of the cutter according to the speed of the third transport roller.
According to the present invention, in the configuration in which the web is cut by rotating the cutter in a direction corresponding to the conveying direction, it is possible to prevent the cut surface from being disturbed.

In order to solve the above problems, the present invention provides at least a web forming unit that forms a web on which fibers are deposited, a first transport roller and a second transport roller that transport the web, and the second transport roller. Control of a sheet manufacturing apparatus that controls a sheet manufacturing apparatus that includes a cutting unit that is positioned downstream in the web conveyance direction and cuts the web while moving a cutting position in a direction that intersects the web conveyance direction. In the method, the speed of the cutting operation by the cutting unit is controlled according to the speed of the second transport roller.
According to this invention, even if it is a case where the speed of a 2nd conveyance roller changes, a web can be cut | disconnected appropriately by a cutting part, and disorder of a cut surface can be prevented or suppressed.

  The present invention can also be realized in various forms other than the above-described sheet manufacturing apparatus and control method of the sheet manufacturing apparatus. For example, a system including the above sheet manufacturing apparatus can be configured. Moreover, you may implement | achieve as a program which a computer performs in order to perform the control method of said sheet manufacturing apparatus. Also, the present invention can be realized in the form of a recording medium that records the program, a server device that distributes the program, a transmission medium that transmits the program, a data signal that embodies the program in a carrier wave, and the like.

The schematic diagram which shows the structure of a sheet manufacturing apparatus. The schematic diagram which shows the structure of a sheet | seat formation part and a cutting part. The perspective view of a rotary cutter. The block diagram which shows the structure of the control system of a sheet manufacturing apparatus. The functional block diagram of a control part and a memory | storage part. The timing chart which shows operation | movement of a sheet manufacturing apparatus. The flowchart which shows operation | movement of a sheet manufacturing apparatus. The flowchart which shows operation | movement of a sheet manufacturing apparatus.

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

FIG. 1 is a schematic diagram illustrating a configuration of a sheet manufacturing apparatus 100 according to the embodiment.
The sheet manufacturing apparatus 100 described in the present embodiment, for example, after used fiber such as confidential paper as a raw material is defibrated and fiberized by dry process, and then pressurized, heated and cut to obtain new paper. It is an apparatus suitable for manufacturing. By mixing various additives with the fiberized raw material, it is possible to improve the bond strength and whiteness of paper products and add functions such as color, fragrance, and flame resistance according to the application. Also good. In addition, by controlling the density, thickness, and shape of the paper, various thicknesses and sizes of paper such as A4 and A3 office paper and business card paper can be manufactured.
The sheet manufacturing apparatus 100 includes a supply unit 10, a crushing unit 12, a defibrating unit 20, a sorting unit 40, a first web forming unit 45, a rotating body 49, a mixing unit 50, a deposition unit 60, a second web forming unit 70, A conveyance unit 79, a sheet forming unit 80, and a cutting unit 90 are provided.

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

  In the present embodiment, the humidifying units 202, 204, 206, and 208 are configured by a vaporization type or warm air vaporization type humidifier. That is, the humidifying units 202, 204, 206, and 208 have a filter (not shown) that infiltrates water, and supplies humidified air with increased humidity by allowing air to pass through the filter.

  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 a sheet may be anything as long as it contains 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. In this embodiment, the supply unit 10 includes a stacker that accumulates and accumulates used paper, and the used paper is fed from the stacker to the crushing unit 12 by an operation of a paper feed motor 313 (FIG. 4) described later.

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

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

  Humidified air is supplied by the humidifying unit 202 to the chute 9 included in the crushing unit 12 or in the vicinity of the chute 9. Thereby, the phenomenon that the crushed material cut | judged with the rough crushing blade 14 adsorb | sucks to the chute | shoot 9 and the inner surface of the pipe | tube 2 by static electricity can be suppressed. In addition, since the crushed material cut by the pulverizing blade 14 is transferred to the defibrating unit 20 together with humidified (high humidity) air, the effect of suppressing adhesion of the defibrated material inside the defibrating unit 20 is also achieved. I can expect. 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. Moreover, you may neutralize using an ionizer with the humidification part 202. FIG.

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

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

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

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

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

In the present embodiment, the sorting unit 40 includes a drum unit (sieving unit) 41 and a housing unit (covering unit) 43 that accommodates the drum unit 41.
The drum portion 41 is a cylindrical sieve that is rotationally driven by a motor. The drum portion 41 has a net (filter, screen) and functions as a sieve. Based on the mesh, the drum unit 41 sorts a first selection smaller than the mesh opening (opening) and a second selection larger than the mesh opening. As the net of the drum portion 41, for example, a metal net, an expanded metal obtained by extending a cut metal plate, or a punching metal in which a hole is formed in the metal plate by a press machine or the like 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 selection flowed through the pipe 8 flows through the pipe 2 together with the coarsely crushed pieces cut by the coarse crushing section 12 and is guided to the introduction port 22 of the defibrating section 20. As a result, the second selected item is returned to the defibrating unit 20 and defibrated.

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

The first web forming unit 45 (separation unit) includes a mesh belt 46 (separation belt), a roller 47, and a suction unit (suction mechanism) 48. 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. Along with the belt 46, it is conveyed in the direction of the arrow. The fine particles falling from the mesh belt 46 include defibrated materials that are relatively small or low in density (resin particles, colorants, additives, etc.), and the sheet manufacturing apparatus 100 does not use them for manufacturing the sheet S. It is a removed product.
During the normal operation of manufacturing the sheet S, the mesh belt 46 moves at a constant speed V1. Here, the normal operation is an operation excluding the start control and stop control of the sheet manufacturing apparatus 100 to be described later. More specifically, the sheet manufacturing apparatus 100 manufactures a sheet S having a desired quality. It points to while doing.

  Accordingly, the defibrated material that has been defibrated by the defibrating unit 20 is sorted into the first sorted product and the second sorted product by the sorting unit 40, and the second sorted product is returned to the defibrating unit 20. Further, the removed material is removed from the first selected material by the first web forming unit 45. The remainder obtained by removing the removed material from the first selection is a material suitable for manufacturing the sheet S, and this material is deposited on the mesh belt 46 to form the first web W1.

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

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

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

  Humidified air is supplied to the space including the drum unit 41 by the humidifying unit 204. The humidified air is humidified in the sorting unit 40 by the humidified air. Thereby, the adhesion of the first selection to the mesh belt 46 due to the electrostatic force can be weakened, and the first selection can be easily separated 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 products including relatively small ones having a low density (resin particles, colorants, additives, etc.) among the defibrated materials are separated and removed. For example, it is good also as a structure which removes the microparticles | fine-particles contained in a 1st selection material from a 1st selection material by a classifier. In this case, for example, the second sorted product may be returned to the defibrating unit 20, the removed product is collected by the dust collecting unit 27, and the first sorted product excluding the removed product may be sent to the pipe 54. .

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

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

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

Although the structure of the rotating body 49 is arbitrary, in this embodiment, it can be made into the rotating feather shape which has a plate-shaped blade | wing and rotates. The rotating body 49 is disposed at a position where the first web W1 peeled off from the mesh belt 46 and the blades are in contact with each other. Due to the rotation of the rotating body 49 (for example, the rotation in the direction indicated by the arrow R in the figure), the blade collides with the first web W <b> 1 that is peeled from the mesh belt 46 and is transported, 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 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 (transfer blower).

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

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

  The additive supply unit 52 (resin storage unit) is connected to 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 and binds a plurality of fibers. 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 fiber, the additive supplied by the additive supply unit 52 includes a colorant for coloring the fiber, fiber aggregation, and resin aggregation depending on the type of sheet to be manufactured. It may also contain a coagulation inhibitor for suppressing odor, and a flame retardant for making the fibers difficult to burn. Moreover, the additive which does not contain a colorant may be colorless or light enough to be considered colorless, or may be white.

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

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

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

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

  A second web forming unit 70 is disposed below the drum unit 61. The 2nd web formation part 70 (web formation part) 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. Further, the moving speed of the mesh belt 72 can be controlled by a control unit 150 (FIG. 4) described later. During the normal operation of manufacturing the sheet S, the mesh belt 72 moves at a constant speed V2. The normal operation is as described above.

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

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

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

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

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

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

The suction mechanism 79c 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, and 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 by pressurizing and heating the second web W <b> 2 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 the 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 <b> 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 <b> 2 pressed by the calendar roller 85 to form the sheet S.
As described above, the second web W <b> 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 tray or a stacker on which a sheet S of a predetermined size is placed.

  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.

  Moreover, in the said structure, the humidification parts 210 and 212 may be comprised with one ultrasonic humidifier, and may be comprised with 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, the blower with which the sheet manufacturing apparatus 100 mentioned above is provided is not limited to the defibrating part blower 26, the collection blower 28, the mixing blower 56, the suction blower 77, and the intermediate blower. For example, it is of course possible to provide a blower for assisting each blower described above in the duct.

In the above configuration, the crushing unit 12 first crushes the raw material and manufactures the sheet S from the raw material that has been crushed. For example, a configuration in which the sheet S is manufactured using fibers as the raw material, 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 of the sheet manufacturing apparatus 100, and shows the main parts including the sheet forming unit 80 and the cutting unit 90 in more detail.
The first cutting unit 92 (cutting unit) includes a rotary cutter 901 (cutter) that cuts the sheet S heated by the heating unit 84. The first cutting unit 92 includes a pre-cutter roller 911 located on the upstream side of the rotary cutter 901 in the transport direction F and a post-cutter roller 913 located on the downstream side of the rotary cutter 901. The pair of pre-cutter rollers 911 sandwich the sheet S heated by the heating unit 84 with a predetermined nip pressure and convey the sheet S toward the rotary cutter 901. Further, the post-cutter roller 913 conveys the sheet S cut by the rotary cutter 901 toward the second cutting unit 94 with a predetermined nip pressure.

FIG. 3 is a perspective view of the rotary cutter 901.
The rotary cutter 901 is configured by disposing a cutting blade 903 on the outer peripheral surface of the shank 902. The rotary cutter 901 cuts the sheet S in the direction intersecting the conveyance direction F, specifically in the width direction W of the sheet S, by the cutting blade 903 while rotating in the rotation direction indicated by the symbol R1 in the drawing, A shaped cut surface C is formed. The sheet S has a smaller thickness than the size in the width direction W or the conveyance direction F, but the portion cut by the first cutting unit 92 has an area, and is therefore referred to as a cut surface C. The cutting surface C formed by the cutting blade 903 is not limited to the direction orthogonal to the conveyance direction F. For example, when the standard size sheet S is manufactured by the sheet manufacturing apparatus 100, the cutting surface C is a straight line orthogonal to the conveyance direction F. It is preferable that

  The shank (shaft) 902 can be configured as a round bar or a cylindrical shape, but may be a bar shape having a D-shaped cross section, for example. The shank 902 is connected to the output shaft of the cutter drive motor 335 (FIG. 4) via, for example, a link mechanism or gear (not shown), and is driven by the cutter drive motor 335. The shank 902 is disposed in parallel with the rotation axes of the pre-cutter roller 911 and the post-cutter roller 913, and is driven to rotate in the direction R1.

  The cutting blade 903 extends in the longitudinal direction (rotation central axis direction) of the shank 902 and is attached along the outer peripheral surface of the shank 902. In the example of FIG. 3, the cutting blade 903 is arranged in a spiral shape with respect to the outer periphery of the shank 902, but the cutting blade 903 may be arranged parallel to the longitudinal direction of the shank 902.

  Rings 904 and 905 are attached to both ends of the cutting blade 903. The ring 904 and the ring 905 support the end of the cutting blade 903, and rotate the cutting blade 903 together with the shank 902 when the shank 902 rotates in the direction R1. The rings 904 and 905 press the cutting edge 903 against the sheet S as the shank 902 rotates, and cause the cutting edge 903 to bite into the sheet S.

  By rotating the rotary cutter 901 once, the sheet S is cut from the side end SW1 to the side end SW2, and a cut surface C is formed on the sheet S. In the cutting operation of the rotary cutter 901, the position where the cutting edge of the cutting blade 903 contacts the sheet S, that is, the cutting position moves from the side end SW1 to the side end SW2. That is, the first cutting unit 92 has a configuration that cuts the sheet S while moving the cutting position in the width direction W of the sheet S.

  As described above, the rotary cutter 901 of the present embodiment is supported by the shank 902 as a fixed rotation shaft, and the cutting position is moved by the cutting blade 903 extending in the longitudinal direction of the shank 902, that is, in the axial direction. The sheet S is cut. The term “rotary cutter” sometimes refers to a cutter in which a cutting blade is formed on the outer peripheral portion of a metal disc, and a so-called round blade is rotated to cut an object to be cut. The configuration of 901 is as described above.

  Here, a period from when the rotary cutter 901 starts to rotate until it stops may be a cutting operation of the rotary cutter 901. Further, a period from when the cutting blade 903 comes into contact with the sheet S to when the cutting blade 903 leaves the sheet S may be a cutting operation of the rotary cutter 901.

  The rotary cutter 901 starts rotating at a timing designated by the control of the control unit 150 (FIG. 4), which will be described later, and rotates at a speed in cooperation with the transport speed in the transport direction F of the sheet S. Thus, a straight cut surface C is formed.

  Returning to FIG. 2, the sheet S cut by the rotary cutter 901 is conveyed to the second cutting unit 94 by the post-cutter roller 913. The second cutting unit 94 includes a side cutter 920, and the side end portions SW1 and SW2 of the sheet S are cut by the side cutter 920. The side cutter 920 has, for example, two circular blades (so-called round blades) arranged corresponding to the side end portions SW1 and SW2, respectively. The side cutter 920 cuts the side ends SW <b> 1 and SW <b> 2 linearly along the transport direction F by rotating two round blades in the direction indicated by the symbol R <b> 2. As a result, both end portions in the width direction W of the sheet S are smoothly arranged.

As shown in FIG. 2, sagging or bending of the second web W2 may occur in a range 81 between the pressure unit 82 and the heating unit 84 in the conveyance path of the second web W2. In the following description, sagging and deflection are collectively referred to as sagging, and sagging refers to sagging and / or sagging. The sag in the range 81 is caused by a difference between the conveyance speed at which the calendar roller 85 conveys the second web W2 and the conveyance speed at which the heating roller 86 conveys the second web W2.
When the second web W2 sags in the range 81, it is possible to prevent excessive tension from being generated in the second web W2 when the relative speed between the calendar roller 85 and the heating roller 86 changes.

  The sheet manufacturing apparatus 100 includes a tension sensor 401 that detects the state of sagging of the second web W <b> 2 in the range 81. The tension sensor 401 includes an upper detection unit 402 disposed at the upper part of the conveyance path of the second web W2, and a lower detection unit 403 located at the lower part of the conveyance path of the second web W2. In the range 81, when the sag of the second web W2 is very small, the second web W2 overlaps the upper detection unit 402, and when the sag of the second web W2 reaches an allowable upper limit, The web W2 overlaps the lower detection unit 403. The tension sensor 401 can detect whether or not the second web W2 is in a position overlapping the upper detection unit 402 or the lower detection unit 403.

  In the conveyance path of the sheet S, sagging of the sheet S may occur also in a range 83 between the heating unit 84 and the first cutting unit 92 (specifically, the roller 911 before the cutter). The sagging of the sheet S is caused by a difference between the conveyance speed at which the heating roller 86 conveys the sheet S and the conveyance speed at which the pre-cutter roller 911 conveys the sheet S. When the sheet S sags in the range 83, it is possible to prevent excessive tension from being generated in the sheet S when the relative speed between the heating roller 86 and the pre-cutter roller 911 changes.

  The sheet manufacturing apparatus 100 includes a tension sensor 405 that detects the state of sagging of the sheet S in the range 83. The tension sensor 405 includes an upper detection unit 406 disposed in the upper part of the sheet S conveyance path and a lower detection unit 407 located in the lower part of the sheet S conveyance path. In the range 83, when the sag of the sheet S is very small, the sheet S overlaps with the upper detection unit 406, and when the sag of the sheet S reaches an allowable upper limit, the sheet S reaches the lower detection unit 407. Overlap. The tension sensor 405 can detect whether the sheet S is in a position overlapping the upper detection unit 406 or the lower detection unit 407.

  The upper detection unit 402 includes, for example, a transmissive or reflective optical sensor, and detects that the second web W2 overlaps the position of the upper detection unit 402. The same applies to the lower detection unit 403, the upper detection unit 406, and the lower detection unit 407.

  As will be described later, the control unit 150 adjusts the tension and sagging amount of the second web W <b> 2 by controlling the conveyance speed of the heating roller 86 based on the detection value of the tension sensor 401. Similarly, the control unit 150 adjusts the tension and sagging amount of the sheet S by controlling the conveyance speed of the pre-cutter roller 911 based on the detection value of the tension sensor 405. Note that the control unit 150 controls the conveyance speed of the calendar roller 85 and the conveyance speed of the heating roller 86 in place of or in addition to the control of the heating roller 86 and the pre-cutter roller 911, whereby the tension and sagging amount of the sheet S are controlled. May be adjusted. That is, the control unit 150 adjusts the amount of sag by controlling the speed of at least two roller pairs of the heating roller 86 and the pre-cutter roller 911.

  The amount of sag of the second web W2 and the sheet S varies depending on the influence of the thickness of the second web W2 and the sheet S, the amount of additive mixed in the additive supply unit 52, the type of additive, and the like. For example, when the user sets the sheet manufacturing apparatus 100 so as to manufacture a thick sheet S, the weight per unit area of the second web W2 and the sheet S is increased, and sagging is likely to occur. On the other hand, depending on the amount of additive added and the type of additive, sagging is less likely to occur when the hardness or elasticity of the sheet S is high. For this reason, it is desirable that the control unit 150 detects and adjusts the actual amounts of sag of the second web W2 and the sheet S based on the detection states of the tension sensors 401 and 405.

  In addition, it is preferable to provide the 1st tension roller 87 which provides a tension | tensile_strength to the 2nd web W in the range 81 (between the calendar roller 85 and the heating roller 86). Similarly, it is preferable to provide a second tension roller 88 that applies tension to the sheet S in the range 83 (between the heating roller 86 and the pre-cutter roller 911). In this case, the tension sensors 401 and 405 detect the positions of the first and second tension rollers, and the controller 150 sags the second web W2 and the sheet S based on the detection states of the tension sensors 401 and 405. The amount may be detected.

  The control unit 150 performs control to coordinate the conveyance speed of the pre-cutter roller 911 and the conveyance speed of the post-cutter roller 913. Specifically, the conveyance speed of the post-cutter roller 913 is controlled to be the same as or higher than the conveyance speed of the pre-cutter roller 911. Thereby, since a slight tension is applied to the sheet S at the cutting position of the rotary cutter 901, disturbance of the cut surface C can be prevented or suppressed. In addition, the one-way clutch is provided in the drive mechanism of the roller 911 before cutter, and the 2nd web W is conveyed by the conveyance direction F through the 1st cutting part 92 at the conveyance speed of the roller 913 after cutter.

  Thus, the conveyance speed of the post-cutter roller 913 is affected by the conveyance speed of the pre-cutter roller 911. Further, the conveyance speed of the pre-cutter roller 911 is controlled according to the detection state of the tension sensor 405 and the conveyance speed of the heating roller 86. Furthermore, the conveyance speed of the heating roller 86 is controlled according to the detection state of the tension sensor 401 and the conveyance speed of the calendar roller 85.

That is, when the control unit 150 changes the conveyance speed of each roller in order to adjust the amount of sag in the ranges 81 and 83, the conveyance speed of the sheet S in the first cutting unit 92 changes. On the other hand, in the first cutting unit 92, the rotation timing and the rotation speed of the rotary cutter 901 are controlled to synchronize or cooperate with the rotation of the post-cutter roller 913.
The control unit 150 drives the rotary cutter 901 so that the peripheral speed of the cutting blade 903 is substantially the same as the speed at which the sheet S is conveyed by the post-cutter roller 913. By this control, the relative speed between the cutting blade 903 and the sheet S is very small or almost zero, so that the cutting position of the cutting blade 903 moves substantially linearly along the width direction W of the sheet S, A straight cut surface C is formed.
In addition, the control unit 150 may drive the rotary cutter 901 so that the peripheral speed of the cutting blade 903 is several times the conveying speed of the sheet S by the post-cutter roller 913. If the conveyance speed of the sheet S and the peripheral speed of the cutting edge 903 are an appropriate combination, the sheet S is conveyed in the conveyance direction F even if there is a speed difference between the cutting edge 903 and the sheet S. The cut surface C that has been cut can be a straight line orthogonal to the transport direction F.

If the conveyance speed of the sheet S changes during the cutting operation of the rotary cutter 901, the relative speed between the cutting blade 903 and the sheet S changes, so there is a high possibility that the cut surface C will not be linear. In order to avoid this situation, adjusting the conveyance speed of the cutting edge 903 so that the relative speed between the cutting edge 903 and the sheet S does not change requires extremely high-precision control and is not easy.
The sheet manufacturing apparatus 100 according to the present embodiment solves the above-described problem and prevents disturbance of the cut surface C by coordinating the operation timing of the rotary cutter 901 and the timing for controlling the conveyance speed of each roller. .

FIG. 4 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. 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.

The display panel 116 is a display panel such as a liquid crystal display, and is installed in front of the sheet manufacturing apparatus 100, for example. The display panel 116 displays the operation state of the sheet manufacturing apparatus 100, various setting values, warning display, and the like according to the control of the main processor 111.
The 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 implements 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 tension sensor 401, and a tension sensor 405.

  The used paper remaining amount sensor 301 detects the remaining amount of used paper stored in the supply unit 10. 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 unit 150 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 unit 150 provides a notification when the amount of the sheet S detected by the paper discharge sensor 303 is equal to or greater than a set value.

  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 crushing unit 311, a defibrating unit 312, a paper feed motor 313, an additive supply unit 314, a blower 315, a humidifying unit 316, a drum driving unit 317, and a belt as control targets of the control device 110. The drive unit 318 and the dividing unit 319 are connected.

  The crushing unit 311 includes a driving unit such as a motor that rotates a cutting blade (not shown) that cuts used paper as a raw material in the crushing unit 12. The defibrating unit 312 includes a drive unit such as a motor that rotates a rotor (not shown) included in the defibrating unit 20. The paper feed motor 313 is a motor that supplies used paper from the supply unit 10. The additive supply unit 314 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 drum driving unit 317 includes driving units such as a motor that rotates the drum unit 41 and a motor that rotates the drum unit 61. 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 331, a pressurizing unit driving motor 332, a roller driving motor 333, a roller driving motor 334, a cutter driving motor 335, and a cutter driving motor 336 are connected to the driving unit I / F 115.

The heating unit driving motor 331 is connected to the driving unit I / F 115 via a driving IC (Integrated Circuit) 321 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 331. The drive IC 321 may include a detection unit such as a rotary encoder or a rotation angle sensor that detects the rotation amount or rotation angle of the heating unit drive motor 331.
The pressure unit drive motor 332 is connected to the drive unit I / F 115 via the drive IC 322 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 332. The drive IC 322 may include a detection unit such as a rotary encoder or a rotation angle sensor that detects the rotation amount or rotation angle of the pressure unit drive motor 332.

  The roller drive motor 333 is connected to the drive unit I / F 115 via the drive IC 323 and drives the pre-cutter roller 911. The roller drive motor 334 is connected to the drive unit I / F 115 via the drive IC 324 and drives the post-cutter roller 913. The control device 110 controls the start, stop, and rotation speed of rotation for each of the roller drive motor 333 and the roller drive motor 334. The drive ICs 323 and 324 may include detection units such as a rotary encoder and a rotation angle sensor that detect the rotation amount and rotation angle of the roller drive motors 333 and 334.

  The cutter drive motor 335 is connected to the drive unit I / F 115 via the drive IC 325 and drives the rotary cutter 901. The cutter drive motor 336 is connected to the drive unit I / F 115 via the drive IC 326 and drives the side cutter 920. The control device 110 controls the start and stop of the rotation of the cutter drive motor 335 and the cutter drive motor 336.

  The drive ICs 321 to 326 are circuits that supply a drive current to the drive unit according to the control of the main processor 111, and are configured by power semiconductor elements or the like. For example, the drive ICs 321 to 326 are drive circuits that drive an inverter circuit or a stepping motor. The specific configuration and specification of each of the drive ICs 321 to 326 are appropriately selected according to the drive unit to be connected. Further, the configuration of each motor constituting the sheet manufacturing apparatus 100 is not particularly limited.

  In the sheet manufacturing apparatus 100, the conveyance amount (conveyance length) of the sheet S is detected based on the rotation amount of one or both of the roller drive motor 333 and the roller drive motor 334. Accordingly, the control device 110 can appropriately control the timing at which the rotary cutter 901 cuts the sheet S. Therefore, the sheet manufacturing apparatus 100 includes a component for detecting at least the rotation amount of either the roller drive motor 333 or the roller drive motor 334. Specifically, the drive ICs 323 and 324 are provided with detection units such as a rotary encoder and a rotation angle sensor that detect the rotation amount and rotation angle of the roller drive motors 333 and 334, and the detection unit detects the rotation amount. Is mentioned. In the present embodiment, the roller drive motor 334 is configured by a stepping motor, and the control device 110 obtains the rotation amount based on the number of drive steps of the roller drive motor 334. Accordingly, the drive IC 324 outputs a drive pulse to the roller drive motor 334 according to the control of the control device 110, and the control device 110 can count this drive pulse.

FIG. 5 is a functional block diagram of the sheet manufacturing apparatus 100 and shows functional configurations of the storage unit 140 and the control unit 150. The storage unit 140 is a logical storage unit configured by the nonvolatile storage unit 120 and may include the ROM 112.
The control unit 150 and various functional units included in the control unit 150 are formed by the cooperation of software and hardware when the main processor 111 executes a program. Examples of hardware configuring these functional units include a main processor 111, a ROM 112, a RAM 113, and a nonvolatile storage unit 120.

The control unit 150 has functions of an operating system (OS) 151, a display control unit 152, an operation detection unit 153, a detection control unit 154, and a drive control unit 155.
The function of the operating system 151 is a function of a control program stored in the storage unit 140, and each unit of the other control unit 150 is a function of an application program executed on the operating system 151.

The display control unit 152 displays an image on the display panel 116 based on the display data 122.
When the operation on the touch sensor 117 is detected, the operation detection unit 153 determines the content of the GUI operation corresponding to the detected operation position.
The detection control unit 154 acquires detection values of various sensors connected to the sensor I / F 114. In addition, the detection control unit 154 determines the detection value of the sensor connected to the sensor I / F 114 by comparing it with a preset threshold value (setting value). When the determination result corresponds to a condition for performing notification, the detection control unit 154 outputs the notification content to the display control unit 152 and causes the display control unit 152 to perform notification using an image or text.

  The drive control unit 155 controls start (start) and stop of each drive unit connected via the drive unit I / F 115. Further, the drive control unit 155 may be configured to control the rotational speed for the defibrating unit blower 26, the mixing blower 56, and the like.

  The drive control unit 155 controls the rotation speeds of the heating unit drive motor 331, the pressure unit drive motor 332, the roller drive motor 333, and the roller drive motor 334. In this control, the drive control unit 155 acquires the detection states (detection values) of the tension sensors 401 and 405, and controls each motor based on the acquired detection states.

  The drive controller 155 can count the rotation amount of the roller drive motor 334 by counting the drive pulses of the roller drive motor 334. Moreover, the drive control part 155 controls the cutter drive motor 335, rotates the rotary cutter 901, and performs a cut. Further, the drive control unit 155 controls the cutter drive motor 336 and controls the start and stop of the rotation of the side cutter 920.

  The drive control unit 155 may change the rotation speed of the cutter drive motor 335. In this case, the drive control unit 155 sets or adjusts the rotation speed of the cutter drive motor 335 so that the cutting blade 903 cuts the sheet S in accordance with the conveyance speed at which the post-cutter roller 913 conveys the sheet S. To do. Further, the rotational speed of the cutter drive motor 335 may be set in accordance with the conveyance speed of the pre-cutter roller 911. Thereby, the cutting surface C which the cutting blade 903 forms can be made into a preferable linear shape.

  Here, an example of the control of the rotation speeds of the heating unit driving motor 331, the pressurizing unit driving motor 332, and the roller driving motor 333 by the driving control unit 155 will be described. The targets controlled by the drive control unit 155 are the motors described above, and the rotation speed, rotation amount, and rotation speed (rotation speed per unit time) of each motor are the control targets. Here, the speed of each motor refers to the rotational speed. And the target which the drive control part 155 controls each motor is the conveyance speed and conveyance amount of the 2nd web W2 and the sheet | seat S. FIG. In the following description, terms such as the rotation speed, rotation amount, and rotation speed of each motor controlled by the drive control unit 155 and words such as the conveyance speed and conveyance amount of the second web W2 and the sheet S are appropriately used. Describe. Further, regarding the calendar roller 85, the heating roller 86, the pre-cutter roller 911, and the post-cutter roller 913, the speed may be a rotation speed. Or the conveyance speed of the 2nd web W2 or the sheet | seat S which these rollers convey may be sufficient. In the following description, the portion described as the conveyance speed of the roller may be replaced with the rotation speed.

  As an example of the simplest control, an example in which the rotation speed of the pressurizing unit drive motor 332 is set to one is assumed. That is, since the rotation speed of the pressurizing unit drive motor 332 is fixed, the conveyance speed by the calendar roller 85 is constant. The conveyance speed of the calendar roller 85 is VA [m / sec].

  In this case, the drive control unit 155 switches the rotation speed of the heating unit drive motor 331 to at least two stages. That is, the conveyance speed of the heating roller 86 can be switched between VB1 [m / second] higher than the conveyance speed VA of the calendar roller 85 and VB2 [m / second] lower than the conveyance speed VA. That is, VB1> VA> VB2.

  When the conveyance speed of the heating roller 86 is VB1, since the conveyance speed of the heating roller 86 is higher than the conveyance speed of the calendar roller 85, sagging of the second web W2 in the range 81 is reduced. When the lower detection unit 403 included in the tension sensor 401 detects the second web W2, the drive control unit 155 performs heating so that the conveyance speed of the heating roller 86 becomes VB1 in order to reduce the amount of sag of the second web W2. The rotational speed of the unit drive motor 331 is adjusted.

  When the conveyance speed of the heating roller 86 is the speed VB2, the sag of the second web W2 in the range 81 increases because the conveyance speed of the heating roller 86 is lower than the conveyance speed of the calendar roller 85. When the upper detection unit 402 detects the second web W2, the drive control unit 155 increases the amount of sag of the second web W2, so that the heating roller drive motor 331 has a conveying speed of VB2 so that the conveyance speed of the heating roller 86 becomes VB2. Adjust the rotation speed.

  As described above, the drive control unit 155 sets the conveyance speed of the heating roller 86 to at least two stages of VB1 higher than the conveyance speed VA of the calendar roller 85 and VB2 lower than the conveyance speed VA. In other words, the drive control unit 155 sets the conveyance speed of the heating roller 86 to a speed that decreases the amount of sag of the second web W2 in the range 81 and a speed that increases the amount of sag of the second web W2 in the range 81. it can. Thus, the drive control unit 155 can adjust the amount of sag of the second web W2 in the range 81.

In this example, the drive control unit 155 switches the rotation speed of the roller drive motor 333 to at least four stages.
Specifically, the transport speed of the pre-cutter roller 911 is set in two stages for each of the transport speeds VB1 and VB2 of the heating roller 86. Corresponding to the conveyance speed VB1 of the heating roller 86, the conveyance speed of the pre-cutter roller 911 is VC1 [m / second] higher than the conveyance speed VB1 and VC2 [m / second] lower than the conveyance speed VB1. Set to
Corresponding to the conveyance speed VB2 of the heating roller 86, the conveyance speed of the pre-cutter roller 911 is VC3 [m / second] higher than the conveyance speed VB2, and VC4 [m / second] lower than the conveyance speed VB2. Second]. In this case, VC1>VB1> VC2 and VC3>VB2> VC4.

  As described above, the conveyance speed of the pre-cutter roller 911 is set in four stages of speeds VC1, VC2, VC3, and VC4, and the drive control unit 155 rotates the roller drive motor 333 at a rotation speed corresponding to each stage.

  When the conveyance speed of the heating roller 86 is VB1, if the conveyance speed of the pre-cutter roller 911 is VC1, the pre-cutter roller 911 conveys the sheet S at a higher speed than the heating roller 86. Decrease. Further, in this case, if the conveyance speed of the pre-cutter roller 911 is VC2, the pre-cutter roller 911 conveys the sheet S at a lower speed than the heating roller 86, so that the sag of the sheet S in the range 83 increases.

  When the conveyance speed of the heating roller 86 is VB2, if the conveyance speed of the pre-cutter roller 911 is VC3, the pre-cutter roller 911 conveys the sheet S at a higher speed than the heating roller 86. Decrease. Further, in this case, if the conveyance speed of the pre-cutter roller 911 is VC4, the pre-cutter roller 911 conveys the sheet S at a lower speed than the heating roller 86, so that the sag of the sheet S in the range 83 increases.

  When the lower detection unit 407 included in the tension sensor 405 detects the sheet S, the drive control unit 155 performs control to reduce the amount of sag of the sheet S. Specifically, when the conveyance speed of the heating roller 86 is VB1, the drive control unit 155 adjusts the rotation speed of the roller drive motor 333 so that the conveyance speed of the pre-cutter roller 911 is VC1. When the conveyance speed of the heating roller 86 is VB2, the drive control unit 155 adjusts the rotation speed of the roller drive motor 333 so that the conveyance speed of the pre-cutter roller 911 is VC3.

  The drive control unit 155 performs control to increase the amount of sag of the sheet S when the upper detection unit 406 provided in the tension sensor 405 detects the sheet S. Specifically, when the conveyance speed of the heating roller 86 is VB1, the drive control unit 155 adjusts the rotation speed of the roller drive motor 333 so that the conveyance speed of the pre-cutter roller 911 is VC2. When the conveyance speed of the heating roller 86 is VB2, the drive control unit 155 adjusts the rotation speed of the roller drive motor 333 so that the conveyance speed of the pre-cutter roller 911 is VC4.

  As described above, the drive control unit 155 switches the rotation speed of the roller drive motor 333 to four stages or more, so that the sheet S in the range 83 can be obtained regardless of the rotation speed of the heating unit drive motor 331. The amount of sagging can be adjusted. In other words, the drive control unit 155 can switch the conveyance speed of the pre-cutter roller 911 corresponding to the conveyance speed of the heating roller 86. Then, the drive control unit 155 can set the conveyance speed of the pre-cutter roller 911 to a speed at which the amount of sag of the sheet S in the range 83 is decreased and a speed at which the amount of sag of the sheet S in the range 83 is increased. The amount of sagging of the sheet S can be adjusted.

  Since the conveyance speed VB1> VB2, it is clear that the conveyance speed VC1> VC4. On the other hand, there is no limitation on the relationship between the transport speed VC1 and the transport speed VC3, the transport speed VC2 and the transport speed VC3, and the transport speed VC2 and the transport speed VC4. For example, the same speed may be used. In this case, the drive control part 155 should just be able to switch the rotational speed of the roller drive motor 333 to at least three steps or more.

  Further, the drive control unit 155 may be capable of making the conveyance speed of the heating roller 86 the same as the conveyance speed of the calendar roller 85. Similarly, the drive control unit 155 may be capable of setting the conveyance speed of the pre-cutter roller 911 to be equal to the conveyance degree of the heating roller 86.

  Further, the drive control unit 155 controls the rotation speed of the roller drive motor 334 according to the rotation speed of the roller drive motor 333. The conveyance speed of the post-cutter roller 913 may be equal to the conveyance speed of the pre-cutter roller 911, but is preferably higher than the conveyance speed of the pre-cutter roller 911 as described above. Therefore, when changing the rotation speed of the roller drive motor 333, the drive control unit 155 changes the rotation speed of the roller drive motor 334 in accordance with the change in the speed.

Here, a process of adjusting the rotation speed change of the roller drive motor 333 and the operation of the rotary cutter 901 by the drive control unit 155 will be described.
As described with reference to FIG. 3, during the cutting operation of the rotary cutter 901, when the drive control unit 155 changes the rotation speed of each motor and the conveyance speed of the sheet S changes, the cutting surface C becomes linear. It may not be. Therefore, the drive control unit 155 limits the control for changing the rotation speed of each motor at a timing that causes the disturbance of the cut surface C. In order to perform this restriction, the drive control unit 155 uses a pre-drive flag and a cutter drive flag. The pre-drive flag and the cutter drive flag are, for example, data having a value of “0” indicating flag OFF and “1” indicating ON, and are stored in the storage unit 140 (for example, the RAM 113). The The drive control unit 155 has a function of changing the values of the pre-drive flag and the cutter drive flag held by the storage unit 140.

  FIG. 6 is a timing chart showing the operation of the sheet manufacturing apparatus 100, and in particular, shows a control timing chart for switching a flag in accordance with the operation of the rotary cutter 901. 6A shows the timing of the rotary operation of the rotary cutter 901, FIG. 6B shows the change in the value of the pre-drive flag, and FIG. 6C shows the change in the value of the cutter drive flag.

  The drive control unit 155 operates the cutter drive motor 335 corresponding to the length of the sheet S to rotate the rotary cutter 901. For example, the drive control unit 155 detects the length of the sheet S conveyed by the post-cutter roller 913 by counting the drive pulses of the roller drive motor 334. The drive control unit 155 operates the cutter drive motor 335 to rotate the rotary cutter 901 once every time the post-cutter roller 913 transports the sheet S by the set length. As a result, as shown in FIG. 6, the rotary cutter 901 operates periodically.

  The drive control unit 155 turns on the cutter drive flag during the period from when the rotary cutter 901 starts to rotate until it stops, that is, during the cutting operation. In FIG. 6, since the cutting operation is started at time T2, and the cutting operation is ended at time T3, the cutter driving flag is turned ON during the period TE1 from time T2 to T3.

In addition, the drive control unit 155 turns on the pre-drive flag for a predetermined time before the start of the cutting operation. In FIG. 6, the pre-drive flag is switched ON at time T1 before time T2 when the cutting operation is started. The pre-drive flag is changed to OFF at the timing when the cutting operation is started.
The length of the period TE <b> 2 between the times T <b> 1 and T <b> 2 is set in the control unit 150 in advance and is included in the setting data 121, for example. Based on the count value of the driving pulse of the roller driving motor 334, the driving control unit 155 turns on the pre-driving flag at a timing that is before the timing of driving the cutter driving motor 335 by the period TE2. That is, the drive control unit 155 converts the period TE2 into the count value of the drive pulse of the roller drive motor 334 and switches the pre-drive flag.

  Various methods for determining the length of the period TE2 are conceivable. For example, the time required for the drive control unit 155 to stop the control for changing the rotation speed of each motor after the detection state of the tension sensors 401 and 405 is acquired. Can be determined based on

  Here, the control target motors of the drive control unit 155 are a heating unit drive motor 331, a pressure unit drive motor 332, and a roller drive motor 333. Actually, the drive control unit 155 also controls the rotation speed of the roller drive motor 334. However, since the rotation speed of the roller drive motor 334 is controlled in accordance with the roller drive motor 333, here, the above three rollers are targeted. To do.

When the drive control unit 155 acquires the detection states of the tension sensors 401 and 405 at regular intervals according to a preset sampling cycle, for example, the sampling cycle (interval) is set as the period TE11. The length of the period TE11 may be set according to the specifications of the tension sensors 401 and 405 and the conveyance speed of the second web W2 and the sheet S, and can be set to, for example, 50 milliseconds.
Let TE12 be the time required for the drive control unit 155 to determine the sagging state of the second web W2 or the sheet S from the detection values of the tension sensors 401 and 405. For example, in order to prevent erroneous determination due to noise, the drive control unit 155 determines that the state in which the upper detection unit 402 or the lower detection unit 403 detects the second web W2 continues for a predetermined time (for example, 10 milliseconds) or longer. Confirm detection. The same applies to the tension sensor 405. In this case, the drive control unit 155 requires at least the predetermined time to determine the detection state of the tension sensors 401 and 405. This predetermined time is the period TE12.

A period required for the process of determining whether to change any rotation speed of the motor to be controlled after the drive control unit 155 determines the detection states of the tension sensors 401 and 405 is a period TE13. The period TE13 may be determined according to the processing speed of the main processor 111, the specification, the number of interrupt control targets, and the like, and can be set to, for example, 50 milliseconds.
Let TE14 be the time required from when the drive control unit 155 starts changing the rotational speed of the motor to be controlled until the rotational speed actually changes and stabilizes. TE14 may be determined according to the specification of the motor to be controlled, and can be set to 100 milliseconds, for example.
Further, the period TE15 may be determined as a parameter that takes into account the influence of signal delay and the like.

The period TE2 is at least as long as the above period TE14. The period TE14 includes the time until the speed of the physically operating motor and the mechanism that transmits the power of the motor is stabilized, and depends strongly on the specific structure of the motor and the mechanism, and in many cases, the period TE14. This is because it is not easy to shorten.
Preferably, the period TE2 is equal to or longer than the period including the periods TE11, TE12, and the period TE13 in addition to the period TE14. More preferably, it is more than the length including all of the periods TE11 to TE15.

As described above, the period TE2 may be a time obtained by adding the periods TE11 to TE15 as appropriate, or may be stored in the storage unit 140 as the number of driving pulses of the roller drive motor 334 corresponding to this time.
The storage unit 140 may store the values of the periods TE11 to TE15 as the setting data 121. In addition, the length of the periods TE11 to TE15 is preferably a length including the margins in the various times described above.

As described above, in the period TE3 in which the period TE2 is added to the period TE1 in which the rotary cutter 901 is operated, either the pre-drive flag or the cutter drive flag is turned ON. While either the pre-drive flag or the cutter drive flag is ON, the drive control unit 155 does not perform control to change the speed of the motor to be controlled. Therefore, it is possible to prevent the cut surface C from being disturbed by adjusting the amount of sag of the second web W2 and the sheet S.
Moreover, the drive control part 155 drives the rotary cutter 901 periodically as shown in FIG. In this case, the period during which the drive control unit 155 can perform control to change the speed of the controlled motor is a period TE4 shown in FIG. Therefore, it can be said that the timing at which the control for changing the speed of the motor to be controlled is limited to the period TE4.

7 and 8 are flowcharts showing the operation of the sheet manufacturing apparatus 100. FIG.
When the power of the sheet manufacturing apparatus 100 is turned on, the control unit 150 starts the operation of FIG. The control unit 150 executes a startup sequence that initializes each unit of the sheet manufacturing apparatus 100 (step S11), and shifts to a state in which the sheet S can be manufactured. In the activation sequence, various motors and blowers controlled by the drive control unit 155 are appropriately activated in an appropriate order. Accordingly, when the activation sequence is completed, the second web W2 is supplied to the sheet forming unit 80.

  The control unit 150 drives the roller drive motor 334 at an appropriate timing when the second web W2 is conveyed to the sheet forming unit 80 and the sheet S is supplied from the sheet forming unit 80 to the cutting unit 90, and then the post-cutter roller 913. Rotate. The controller 150 starts counting the drive pulses of the roller drive motor 334 in order to detect the rotation amount of the roller drive motor 334 (step S12).

  In addition, the control unit 150 starts acquiring the detection values of the tension sensors 401 and 405 (step S13). The control unit 150 starts controlling the rotation speeds of the heating roller 86, the pre-cutter roller 911, and the post-cutter roller 913 (step S14). Here, the execution order of steps S12 to S14 is not limited to the example of FIG. 7, and may be performed simultaneously or in parallel.

  The control unit 150 refers to the count value of the drive pulse of the roller drive motor 334 that has started counting in step S12, and whether or not the timing for turning on the pre-drive flag (for example, times T1 and T4 in FIG. 6) has been reached. Is determined (step S15). When it is determined that it is not time to turn on the pre-drive flag (step S15; No), the control unit 150 returns to step S15.

  When it is determined that it is time to turn on the pre-drive flag (step S15; Yes), the control unit 150 changes the pre-drive flag to ON (step S16). The controller 150 refers to the count value of the drive pulse of the roller drive motor 334 that has started counting in step S12, and whether or not the timing for driving the rotary cutter 901 (for example, times T2 and T5 in FIG. 6) has been reached. Is determined (step S17). If it is determined that it is not time to drive the rotary cutter 901 (step S17; No), the control unit 150 returns to step S17.

  If it is determined that it is time to drive the rotary cutter 901 (step S17; Yes), the control unit 150 changes the cutter drive flag to ON (step S18), and changes the pre-drive flag to OFF (step S19). . The control unit 150 operates the cutter drive motor 335 to start the cutting operation of the rotary cutter 901 (step S20). In step S20, the control unit 150 may drive the cutter drive motor 335 after determining the rotation speed of the cutter drive motor 335 according to the rotation speed of the roller drive motor 334 or the roller drive motor 333.

  The control unit 150 monitors whether or not the cutting operation is completed (step S20), waits until the cutting operation is not completed (step S21; No), and completes the cutting operation (step S21; Yes). Is changed to OFF (step S22).

  The control unit 150 determines whether or not to end the operation of the sheet manufacturing apparatus 100 (step S23). When the operation is continued (Step S23; No), the control unit 150 returns to Step S15. Moreover, when stopping an operation (step S23; Yes), the control unit 150 executes a stop sequence (step S24).

  With the operation in FIG. 7, the pre-drive flag and the cutter drive flag are turned ON / OFF in accordance with the timing of driving the rotary cutter 901.

  FIG. 8 shows an operation for controlling the speed of the motor in accordance with the pre-drive flag and the cutter drive flag. The operation of FIG. 8 is started after step S13 of FIG. 7, and is executed in parallel with the operation of FIG.

  The control unit 150 starts acquiring the detection value of the sensor in step S13 of FIG. 7, and then acquires the detection value of the tension sensor 401 and the detection value of the tension sensor 405 according to a preset sampling cycle (see FIG. 7). Step S31). The detection value of the tension sensor 401 includes the detection values of the upper detection unit 402 and the lower detection unit 403. Specifically, it includes a value indicating whether or not the upper detection unit 402 has detected the second web W2, and a value indicating whether or not the lower detection unit 403 has detected the second web W2. Similarly, the detection value of the tension sensor 405 includes the detection values of the upper detection unit 406 and the lower detection unit 407. That is, the upper detection unit 406 and the lower detection unit 407 each include a value indicating whether or not the sheet S has been detected.

  The control unit 150 determines whether the second web W2 or the sheet S has interfered with the position of the tension sensor 401, 405 at any one of the tension sensors 401, 405 based on the detection value acquired at step S31 (step S31). S32). In determination of step S32, the control part 150 may apply and determine the period TE12 mentioned above with respect to the detection value of each detection part.

  When neither the second web W2 nor the sheet S interferes with the positions of the tension sensors 401 and 405 (step S32; No), the control unit 150 returns to step S31. When either the second web W2 or the sheet S interferes with the positions of the tension sensors 401 and 405 (step S32; Yes), the control unit 150 refers to the values of the pre-drive flag and the cutter drive flag (step S33). . The controller 150 determines whether or not the values of the pre-drive flag and the cutter drive flag are on (step S34), and if any of the flags is on (step S34; Yes), the process returns to step S31. On the other hand, when both the pre-drive flag and the cutter drive flag are OFF (step S34; No), the control unit 150 changes the rotation speed of each roller (step S35). In step S35, the control unit 150 adjusts the slack of the second web W2 or the sheet S in accordance with the interference position of the second web W2 or the sheet S in the tension sensors 401 and 405, so that the rotation speed of the motor to be controlled is adjusted. To control.

  The control unit 150 determines whether or not to end the operation of the sheet manufacturing apparatus 100 (step S36). When the operation is continued (Step S36; No), the control unit 150 returns to Step S31. Further, when the operation is stopped (step S36; Yes), the control unit 150 ends the operation of FIG.

  7 and 8, the control unit 150 may process the pre-drive flag and the cutter drive flag with one flag (for example, referred to as a restriction flag). In this case, the control unit 150 turns on the restriction flag at the timing when the pre-drive flag is turned on. Alternatively, the control unit 150 turns on the limit flag a predetermined time before the timing at which the cutter drive flag is turned off. Further, the control unit 150 turns off the restriction flag after a predetermined time has elapsed since the restriction flag was turned on. If the predetermined time from when the restriction flag is turned on to when it is turned off is set to be the period TE3 in FIG. 6 or longer, the same effect as in the above embodiment can be obtained. In this case, the operations in steps S18 and S19 in FIG. 7 can be omitted. Further, only one flag is processed in steps S33 and S34 of FIG. The predetermined time may be included in the setting data 121 as the actual time or the number of drive pulses of the roller drive motor 334.

  As described above, the sheet manufacturing apparatus 100 to which the present invention is applied includes the second web forming unit 70 that forms the second web W2 on which at least fibers are deposited, the first transport roller that transports the second web W2, and Is provided. Moreover, the 2nd conveyance roller which is located in the downstream in the conveyance direction F rather than the 1st conveyance roller and conveys the 2nd web W2 or the sheet | seat S is provided. In addition, the first cutting unit 92 that is located downstream of the second transport roller in the transport direction F and cuts the sheet S while moving the cutting position in a direction that intersects the transport direction of the sheet S is provided. Moreover, it has the control part 150 which controls a 1st and 2nd conveyance roller and the 1st cutting part 92, and the control part 150 of cutting operation | movement by the 1st cutting part 92 according to the speed of a 2nd conveyance roller. Control the speed.

  Here, the first transport roller corresponds to, for example, a calendar roller 85 that is a pair of rollers. In this case, for example, the second transport roller corresponds to the heating roller 86 that is a pair of rollers, but the pre-cutter roller 911 may correspond to the second transport roller. Further, the calendar roller 85 may be a first transport roller, the heating roller 86 may be a second transport roller, and the pre-cutter roller 911 may be a third transport roller. Further, the heating roller 86 may be a first transport roller, the pre-cutter roller 911 may be a second transport roller, and in this case, the post-cutter roller 913 may be a third transport roller.

  According to the sheet manufacturing apparatus 100 of the present invention and the sheet manufacturing apparatus 100 to which the control method of the sheet manufacturing apparatus is applied, even if the speed of the second conveying roller is changed, the sheet S is removed by the first cutting unit 92. It can cut appropriately and can prevent or control disorder of cut surface C.

  The control unit 150 performs control for controlling the slack of the web (second web W2 or sheet S) with the first transport roller (control for adjusting the slack of the web) by adjusting the speed of the second transport roller. . Thereby, the speed | rate of a 2nd conveyance roller can be changed, the slack of a web can be adjusted, and the fracture | rupture etc. of the web which are not intended can be prevented.

The sheet manufacturing apparatus 100 to which the present invention is applied includes a second web forming unit 70 that forms at least a second web W2 on which fibers are deposited, and a heating roller 86 that conveys the second web W2. Also, the pre-cutter roller 911 that conveys the sheet S and located downstream in the conveyance direction F from the heating roller 86, and the cutter that is located downstream in the conveyance direction F and conveys the sheet S from the pre-cutter roller 911. And a rear roller 913. Further, a rotary cutter 901 that cuts the sheet S while moving the cutting position between the pre-cutter roller 911 and the post-cutter roller 913 in a direction that intersects the conveyance direction F of the sheet S is provided. The control unit 150 adjusts the sag of the sheet S with the heating roller 86 by controlling the speed of the pre-cutter roller 911. In addition, the control unit 150 controls the speed of the post-cutter roller 913 according to the speed of the pre-cutter roller 911 and controls the rotation speed of the rotary cutter 901 according to the speed of the post-cutter roller 913.
Even when the speed of the pre-cutter roller 911 is changed to adjust the slack of the second web W2, the speed of the post-cutter roller 913 is changed according to the speed of the pre-cutter roller 911, and the speed of the post-cutter roller 913 is changed. Accordingly, the rotational speed of the rotary cutter 901 is changed, so that the sheet S can be appropriately cut to prevent or suppress the disturbance of the cut surface C of the sheet S.

  The control unit 150 maintains the speed of the post-cutter roller 913 while the sheet S is being cut by the rotary cutter 901. Thereby, since the speed of the post-cutter roller 913 is maintained while the sheet S is cut, the disturbance of the cut surface C can be prevented or suppressed more reliably.

  The control unit 150 maintains the speed of the pre-cutter roller 911 during a period including the time when the rotary cutter 901 cuts the sheet S and before the rotary cutter 901 starts cutting the sheet S. That is, adjustment of the slack of the sheet S by changing the speed of the pre-cutter roller 911 is not performed. Further, by maintaining the speed of the pre-cutter roller 911, the speed of the post-cutter roller 913 is also maintained. Accordingly, the speed of the pre-cutter roller 911 is stabilized before the sheet S is cut, and the speed of the post-cutter roller 913 is maintained during the cutting, so that the disturbance of the cut surface C of the web can be more reliably prevented or suppressed. .

  The control unit 150 changes the speed of the pre-cutter roller 911 during a predetermined period after the sheet S is cut by the rotary cutter 901. Thereby, by avoiding the timing at which the rotary cutter 901 cuts the sheet S, it is possible to prevent the cutting surface C from being disturbed and to adjust the slack of the sheet S by changing the speed of the pre-cutter roller 911.

  The predetermined period is a period during which the post-cutter roller 913 conveys the sheet S for a predetermined length. Accordingly, the speed of the pre-cutter roller 911 can be changed in accordance with a period in which the timing at which the rotary cutter 901 cuts the sheet S can be avoided with reference to the length of conveying the sheet S.

  The rotary cutter 901 includes a fixed shank 902 and a cutting blade 903 provided on the shank 902, and cuts the sheet S by rotating the rotary cutter 901 in a rotation direction R 1 corresponding to the conveyance direction F. The control unit 150 controls the rotation speed of the rotary cutter 901 according to the speed of the post-cutter roller 913. Thereby, in the structure which rotates the rotary cutter 901 in the direction corresponding to the conveyance direction F and cut | disconnects the sheet | seat S, disorder of the cut surface C can be prevented.

  In the above description, the second web W2 that has passed through the sheet forming unit 80 is distinguished and described as the sheet S. However, the sheet S can also be referred to as the second web W2 (or simply the web).

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

  For example, in the above embodiment, the control unit 150 has been described as limiting the control for changing the speed of the control target motor based on the values of the pre-drive flag and the cutter drive flag. Here, although the control target motor has been described as the heating unit driving motor 331, the pressing unit driving motor 332, and the roller driving motor 333, the present invention is not limited to this. For example, the effect of the present invention can be obtained by limiting the change in the speed of the motor that drives one or a predetermined number of rollers that are located upstream of the rotary cutter 901 and is closest to the rotary cutter 901. For example, the effect of the present invention can be obtained by limiting the change in the speed of the roller drive motor 333 that drives at least the pre-cutter roller 911 while the pre-drive flag and the cutter drive flag are ON. More preferably, the control target motor includes a heating unit driving motor 331, and more preferably, a pressurizing unit driving motor 332 is included.

  Moreover, in the said embodiment, the rotary cutter 901 was illustrated as a cutter which cut | disconnects the sheet | seat S. FIG. This invention is not limited to this, What is necessary is just to cut | disconnect the sheet | seat S, moving a cutting position along the width direction W of the sheet | seat S. FIG. For example, a cutter that cuts the sheet S by rotating a so-called round blade having a cutting edge formed on the outer peripheral portion of a metal disk may be provided. Moreover, you may provide the scissors-type cutter which moves the one blade part with respect to the other blade part, and cut | disconnects the sheet | seat S. FIG. Moreover, it is good also as a structure which cut | disconnects the sheet | seat S with an airflow or a laser.

  The sheet manufacturing apparatus 100 is not limited to the sheet S, and may be configured to manufacture a board-like or web-like product made of a hard sheet or a laminated 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, and the like.

  In addition, at least a part of the functional blocks shown in FIGS. 4 and 5 may be realized by hardware, or may be realized by cooperation of hardware and software. As described above, the present invention is not limited to a configuration in which independent hardware resources are arranged. The program executed by the control unit may be stored in a nonvolatile storage unit or another 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.

  2, 3, 7, 8, 23, 29 ... pipe, 9 ... chute, 10 ... supply unit, 12 ... crushing unit, 14 ... crushing blade, 20 ... defibrating unit, 22 ... introduction port, 24 ... discharge port , 26 ... Defibration part blower, 27 ... Dust collection part, 28 ... Collection blower, 40 ... Sorting part, 41 ... Drum part, 42 ... Inlet port, 43 ... Housing part, 44 ... Discharge port, 45 ... First web Forming 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 unit 61 ... Drum unit 62 ... Introducing port 63 ... Housing unit 70 ... Second web forming unit (web forming unit) 72 ... Mesh belt 74 74 Stretching roller 76 76 Suction mechanism 77 Suction Blower, 79 ... Conveying section, 79a ... Mesh belt, 9b ... Stretching roller, 79c ... Suction mechanism, 80 ... Sheet forming part, 81, 83 ... Range, 82 ... Pressing part, 84 ... Heating part, 85 ... Calendar roller (first transport roller), 86 ... Heating roller ( First transport roller, second transport roller), 87 ... first tension roller, 88 ... second tension roller, 90 ... cutting section, 92 ... first cutting section (cutting section), 94 ... second cutting section, 96 ... Discharge unit, 100 ... sheet manufacturing device, 110 ... control device, 111 ... main processor, 112 ... ROM, 113 ... RAM, 114 ... sensor I / F, 115 ... drive unit I / F, 120 ... nonvolatile storage unit, 121 ... setting data, 140 ... storage part, 150 ... control part, 151 ... operating system, 153 ... operation detection part, 154 ... detection control part, 155 ... drive control part 202, 204, 206, 208, 210, 212... Humidification section, 321 to 326... Drive IC, 331... Heating section drive motor, 332 ... pressurization section drive motor, 333 ... roller drive motor, 334 ... roller drive motor, 335 ... Cutter drive motor, 336 ... Cutter drive motor, 401 ... Tension sensor, 402 ... Upper detector, 403 ... Lower detector, 405 ... Tension sensor, 406 ... Upper detector, 407 ... Lower detector, 901 ... Rotary cutter ( Cutter), 902 ... shank (shaft), 903 ... cutting blade, 911 ... pre-cutter roller (second transport roller, third transport roller), 913 ... post-cutter roller (third transport roller), 920 ... side cutter, C ... cut surface, F ... conveying direction, R, R1, R2 ... rotational direction, S ... sheet ( Web), W1 ... first web, W2 ... second web (web).

Claims (8)

A web forming section for forming a web on which at least fibers are deposited;
A first transport roller for transporting the web;
A second transport roller that is positioned downstream of the first transport roller in the web transport direction and transports the web;
A cutting unit that is positioned downstream of the second transport roller in the web transport direction, and that cuts the web while moving a cutting position in a direction that intersects the web transport direction;
A control unit for controlling the first and second transport rollers and the cutting unit;
Have
The controller is
The sheet manufacturing apparatus which controls the speed of the cutting operation by the cutting unit according to the speed of the second transport roller. A web forming section for forming a web on which at least fibers are deposited;
A first transport roller for transporting the web;
A second transport roller that is positioned downstream of the first transport roller in the web transport direction and transports the web;
A third transport roller that is positioned downstream of the second transport roller in the web transport direction and transports the web;
A cutter that cuts the web between the second transport roller and the third transport roller while moving a cutting position in a direction that intersects the web transport direction;
A controller that controls the second and third transport rollers and the cutter;
Have
The controller is
By controlling the speed of the second transport roller, the slack of the web is adjusted with the first transport roller,
A sheet manufacturing apparatus that controls the speed of the third transport roller according to the speed of the second transport roller and controls the speed of the cutting operation by the cutter according to the speed of the third transport roller.   The sheet manufacturing apparatus according to claim 2, wherein the control unit maintains a speed of the third conveyance roller while the web is cut by the cutter.   The said control part maintains the speed of a said 2nd conveyance roller for the period including while the said cutter is cutting the said web, and before the said cutter starts the cutting | disconnection of the said web. The sheet manufacturing apparatus described.   5. The sheet manufacturing apparatus according to claim 2, wherein the control unit changes a speed of the second transport roller during a predetermined period after the web is cut by the cutter.   The sheet manufacturing apparatus according to claim 5, wherein the predetermined period is a period during which the third conveying roller conveys the web for a predetermined length. The cutter includes a fixed shaft and a cutting blade provided on the shaft, and cuts the web by rotating the cutter around the shaft corresponding to the transport direction,
The sheet manufacturing apparatus according to claim 2, wherein the control unit controls a rotation speed of the cutter according to a speed of the third transport roller. A web forming section for forming at least a web on which fibers are deposited, a first transport roller and a second transport roller for transporting the web, and the downstream of the second transport roller in the web transport direction; In a control method of a sheet manufacturing apparatus for controlling a sheet manufacturing apparatus comprising: a cutting unit that cuts the web while moving a cutting position in a direction intersecting with the web conveyance direction;
The control method of the sheet manufacturing apparatus which controls the speed of the cutting operation by the said cutting part according to the speed of the said 2nd conveyance roller.

Images