JP2019163587A - Sheet manufacturing installation - Google Patents

Abstract

To improve conveyance characteristics of web and to reduce disorder of the web in conveying.SOLUTION: A sheet manufacturing installation comprises: a conveying unit having a depositional surface that materials containing fiber deposit as web and conveying the web; and a first roller facing to the depositional surface of the conveying unit, contacting with the web conveyed by the conveying unit, and having a shaft of a crossing direction to the conveying direction of the web by the conveying unit. The radius of the first roller is bigger than the thickness of the web before contacting with the first roller.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a sheet manufacturing apparatus.

  Conventionally, a sheet including a drum section having an opening, a transport section that transports a web on which material that has passed through the opening of the drum section is transported, a housing section that covers the drum section, and a roller that is provided in the housing section and contacts the web A manufacturing apparatus is known (see, for example, Patent Document 1).

JP2015-120999A

  In the above apparatus, for example, when a relatively thick sheet is manufactured, it is necessary to increase the thickness of the web to be deposited in the transport unit in accordance with the thickness of the sheet. However, when the thickness of the web is increased, there is a problem that the web is difficult to pass through the roller of the housing portion, and the web is disturbed.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  [Application Example 1] The sheet manufacturing apparatus according to this application example has a deposition surface on which a material containing fibers is deposited as a web, and is opposed to the conveyance unit that conveys the web, and the deposition surface of the conveyance unit, A first roller abutting on the web conveyed by the conveying unit, the first roller having a rotation axis in a direction intersecting a web conveying direction by the conveying unit, and a radius of the first roller Is larger than the thickness of the web before coming into contact with the first roller.

  According to this configuration, since the radius of the first roller is larger than the thickness of the web before coming into contact with the first roller, the transportability of the web is improved and the disturbance of the web when passing through the first roller is suppressed. be able to.

  Application Example 2 A sheet manufacturing apparatus according to this application example includes a housing portion that covers a sieve portion having a plurality of openings, and a deposition surface on which a material including fibers that have passed through the openings is deposited as a web. A first roller abutting on a web conveyed by the conveying unit, and a seal unit provided on a side wall of the housing unit and in contact with an outer peripheral surface of the first roller, In one roller, the interval between the outer peripheral surface of the first roller and the deposition surface is smaller than the smaller one of the interval between the housing portion and the deposition surface and the interval between the seal portion and the deposition surface, The spacing between the rotation axis of the first roller and the deposition surface is arranged to be larger than the smaller of the spacing between the housing portion and the deposition surface and the spacing between the seal portion and the deposition surface. It is characterized in that is.

  According to this configuration, when the web deposited on the deposition surface is transported, it passes through the gap (gap) between the housing portion or the seal portion and the deposition surface, so the thickness of the web does not become larger than the gap. . Therefore, by disposing the rotation axis of the first roller above the interval, the transportability of the web can be improved and the web disturbance when passing through the first roller can be suppressed.

  [Application Example 3] The sheet manufacturing apparatus according to this application example has a deposition surface on which a material containing fibers is deposited as a web, and is opposed to the conveyance unit that conveys the web, the deposition surface of the conveyance unit, A first roller abutting on a web conveyed by the conveyance unit, the first roller having a rotation axis in a direction intersecting a web conveyance direction by the conveyance unit; and a web on the deposition surface of the conveyance unit A control unit that changes a position of the first roller with respect to the deposition surface according to a thickness of the web, and the control unit has a height of the rotation shaft with respect to the deposition surface that is greater than a thickness of the web. The position of the first roller is changed so as to be higher.

  According to this configuration, the height of the rotating shaft with respect to the deposition surface is controlled to be higher than the thickness of the web. For this reason, irrespective of the thickness of the web, the transportability of the web is improved, and the disturbance of the web when passing through the first roller can be suppressed.

  Application Example 4 The sheet manufacturing apparatus according to the application example includes a control unit that changes the load of the first roller according to the thickness of the web on the deposition surface of the transport unit, and the control unit Is characterized in that when the thickness of the web is large, the load of the first roller is made smaller than when the thickness of the web is small.

  According to this structure, the load of the 1st roller with respect to a web is controlled according to the thickness of a web. For this reason, irrespective of the thickness of the web, the transportability of the web is improved, and the disturbance of the web when passing through the first roller can be suppressed.

  Application Example 5 The sheet manufacturing apparatus according to the application example includes a detector that detects the thickness of the web on the deposition surface of the transport unit, and the control unit is based on a detection result by the detector. And controlling the first roller.

  According to this configuration, since the web thickness is detected, the position and load of the first roller can be changed (controlled) with higher accuracy.

  Application Example 6 The sheet manufacturing apparatus according to the application example includes a reception unit that receives input of information regarding the thickness of a sheet to be manufactured, and the control unit is configured to perform the above operation based on the information regarding the thickness of the sheet. The first roller is controlled.

  According to this configuration, when the thickness of the sheet corresponds to the thickness of the web to be deposited, the first roller can be used based on the thickness information of the sheet to be manufactured without using a detector or the like that detects the thickness of the web. The position and load can be changed (controlled).

  Application Example 7 In the sheet manufacturing apparatus according to the application example, the control unit controls the first roller based on a web conveyance speed by the conveyance unit.

  According to this configuration, when the conveyance speed by the conveyance unit corresponds to the thickness of the web to be deposited, the first roller is based on the conveyance speed by the conveyance unit without using a detector or the like that detects the thickness of the web. The position and load can be changed (controlled).

  Application Example 8 In the sheet manufacturing apparatus according to the application example, the material includes fibers obtained by defibrating the raw material supplied from the supply unit, and the control unit is based on a supply rate of the raw material by the supply unit. The first roller is controlled.

  According to this configuration, when the supply speed by the supply unit corresponds to the thickness of the web to be deposited, the first roller can be used based on the supply speed by the supply unit without using a detector or the like that detects the thickness of the web. The position and load can be changed (controlled).

  Application Example 9 The sheet manufacturing apparatus according to the application example includes a second roller that faces the accumulation surface, is positioned downstream of the first roller in the transport direction, and contacts a web. The distance between the second roller and the deposition surface is smaller than the distance between the first roller and the deposition surface.

  According to this configuration, since the web comes into contact with the second roller disposed on the downstream side in the transport direction with respect to the first roller, the density of the web is further increased, and problems such as tearing can be suppressed.

  Application Example 10 The sheet manufacturing apparatus according to the application example includes a second roller that faces the accumulation surface, is positioned downstream of the first roller in the transport direction, and contacts a web. The control unit is configured to control the second roller based on the position of the first roller so that a distance between the second roller and the deposition surface is smaller than a distance between the first roller and the deposition surface. The position relative to the deposition surface is changed.

  According to this configuration, since the position of the second roller is set according to the thickness of the web that has passed through the first roller, the density can be increased by pressing the web stepwise. Moreover, the disturbance of the conveyed web can be suppressed.

  Application Example 11 In the sheet manufacturing apparatus according to the application example described above, the radius of the second roller is smaller than the radius of the first roller.

  According to this configuration, the configuration of the sheet manufacturing apparatus can be reduced in size.

  Application Example 12 A sheet manufacturing apparatus according to this application example has a deposition surface on which a material containing fibers is deposited as a web, and is opposed to the deposition surface of the conveyance unit, a conveyance unit that conveys the web, Input of information relating to the thickness of a sheet to be manufactured, and a first roller that is in contact with a web conveyed by the conveyance unit and has a rotation axis in a direction that intersects the conveyance direction of the web by the conveyance unit And a control unit that changes the position of the first roller with respect to the deposition surface based on information on the thickness of the sheet received by the receiving unit, the control unit, When the thickness of the sheet is the first thickness, the first roller is positioned at the first height, and when the thickness of the sheet is the second thickness larger than the first thickness, In front of the first roller Characterized in that is positioned in the second height higher than the first height.

  According to this configuration, when the thickness of the web also changes according to the thickness of the sheet to be manufactured, the web is prevented from being disturbed when passing through the first roller by controlling the height of the first roller. Can do.

Schematic which shows the structure of the sheet manufacturing apparatus concerning 1st Embodiment. Schematic which shows the structure around the deposition part concerning 1st Embodiment. The partial enlarged view which shows the structure around the deposit part concerning 1st Embodiment. The partially expanded view which shows the structure of the deposition part periphery concerning 2nd Embodiment. The partial enlarged view which shows the structure of the deposition part periphery concerning 3rd Embodiment. Schematic which shows the structure of the position change mechanism concerning 3rd Embodiment. Schematic which shows the structure of the other position change mechanism concerning 3rd Embodiment. Schematic which shows the structure of the other detector concerning 3rd Embodiment. The partially expanded view which shows the structure of the deposition part periphery concerning 4th Embodiment. Schematic which shows the structure of the other load change mechanism concerning 4th Embodiment. The partially expanded view which shows the structure of the deposit part periphery concerning 5th Embodiment. The partially expanded view which shows the structure of the humidity control part periphery concerning 6th Embodiment. Schematic which shows the structural example of the reception part concerning the modification 2. FIG. Schematic which shows the structural example of the reception part concerning the modification 3. FIG. Schematic which shows the structural example of the reception part concerning the modification 3. FIG.

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

(First embodiment)
First, a sheet manufacturing apparatus according to the present embodiment will be described with reference to the drawings. FIG. 1 is a schematic diagram illustrating a configuration of a sheet manufacturing apparatus according to the present embodiment.

  As shown in FIG. 1, the sheet manufacturing apparatus 100 includes a supply unit 10, a manufacturing unit 102, and a control unit 104. The manufacturing unit 102 manufactures a sheet. The manufacturing unit 102 includes 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, and a second web forming unit. 70, a sheet forming unit 80, and a cutting unit 90.

  The supply unit 10 supplies raw materials to the crushing unit 12. The supply unit 10 is, for example, an automatic input unit for continuously supplying raw materials to the crushing unit 12. The raw material supplied by the supply part 10 contains fibers, such as a used paper and a pulp sheet, for example.

  The crushing unit 12 cuts the raw material supplied by the supply unit 10 into air into pieces. The shape and size of the strip is, for example, a strip of several cm square. In the illustrated example, the crushing unit 12 has a crushing blade 14, and the charged raw material can be cut by the crushing blade 14. As the crushing part 12, a shredder is used, for example. The raw material cut by the crushing unit 12 is received by the hopper 1 and then transferred (conveyed) to the defibrating unit 20 through the pipe 2.

  The defibrating unit 20 defibrates the raw material cut by the crushing unit 12. 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 materials, and paper strength enhancing agents 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. As the defibrating unit 20, an impeller mill is used in the present embodiment. The defibrating unit 20 has a function of generating an air flow that sucks the raw material and discharges the defibrated material. As a result, the defibrating unit 20 can suck the raw material together with the airflow from the introduction port 22 with the airflow generated by itself, defibrate, and transport the defibrated material to the discharge port 24. The defibrated material that has passed through the defibrating unit 20 is transferred to the sorting unit 40 via the tube 3. In addition, the airflow for conveying a defibrated material from the defibrating unit 20 to the sorting unit 40 may use an airflow generated by the defibrating unit 20, or an airflow generation device such as a blower is provided, May be used.

  The sorting unit 40 introduces the defibrated material defibrated by the defibrating unit 20 from the introduction port 42 and sorts the defibrated material according to the length of the fiber. As the selection unit 40, for example, a sieve (drum unit) 41 is used. The sieve 41 of the sorting unit 40 has a mesh (filter, screen), and has fibers or particles smaller than the mesh size of the mesh (things that pass through the mesh, the first sorted matter) and the mesh size of the mesh. Large fibers, undefibrated pieces, and lumps (those that do not pass through the net, second selection) can be separated. For example, the first selection is transferred to the mixing unit 50 via the pipe 7. The second selected item is returned to the defibrating unit 20 from the discharge port 44 through the pipe 8. Specifically, the sieve 41 of the sorting unit 40 is a cylinder and is rotationally driven by a motor. As the net of the sorting unit 40, for example, a metal net, an expanded metal obtained by extending a cut metal plate, or a punching metal in which a hole is formed in the metal plate by a press machine or the like is used.

  The first web forming unit 45 conveys the first sorted product that has passed through the sorting unit 40 to the mixing unit 50. The first web forming unit 45 includes a mesh belt 46, a tension roller 47, and a suction unit (suction mechanism) 48.

  The suction unit 48 can suck the first sorted matter dispersed in the air through the opening (opening of the mesh) of the sorting unit 40 onto the mesh belt 46. The first selection is deposited on the moving mesh belt 46 to form the web V. Basic configurations of the mesh belt 46, the stretching roller 47, and the suction unit 48 are the same as those of the mesh belt 72, the stretching roller 74, and the suction mechanism 76 of the second web forming unit 70 to be described later.

  The web V is formed in a soft and swelled state containing a lot of air by passing through the sorting unit 40 and the first web forming unit 45. The web V deposited on the mesh belt 46 is put into the tube 7 and conveyed to the mixing unit 50.

  The rotating body 49 can cut the web V before the web V is conveyed to the mixing unit 50. In the illustrated example, the rotator 49 has a base 49a and a protrusion 49b protruding from the base 49a. The protrusion 49b has, for example, a plate shape. In the illustrated example, four protrusions 49b are provided, and four protrusions 49b are provided at equal intervals. When the base 49a rotates in the direction R, the protrusion 49b can rotate around the base 49a. By cutting the web V with the rotator 49, for example, the variation in the amount of defibrated material per unit time supplied to the deposition unit 60 can be reduced.

  The rotating body 49 is provided in the vicinity of the first web forming portion 45. In the illustrated example, the rotating body 49 is provided in the vicinity of the stretching roller 47a located on the downstream side in the path of the web V (next to the stretching roller 47a). The rotating body 49 is provided at a position where the protrusion 49b can come into contact with the web V and not in contact with the mesh belt 46 on which the web V is deposited. Thereby, it is possible to suppress the mesh belt 46 from being worn (damaged) by the protrusion 49b. The shortest distance between the protrusion 49b and the mesh belt 46 is, for example, not less than 0.05 mm and not more than 0.5 mm. This is the distance at which the web V can be cut without the mesh belt 46 being damaged.

  The mixing unit 50 mixes the first sorted product that has passed through the sorting unit 40 (the first sorted product conveyed by the first web forming unit 45) and the additive containing resin. The mixing unit 50 includes an additive supply unit 52 that supplies the additive, a pipe 54 that conveys the first selected product and the additive, and a blower 56. In the illustrated example, the additive is supplied from the additive supply unit 52 to the pipe 54 via the hopper 9. The tube 54 is continuous with the tube 7.

  In the mixing unit 50, an air flow is generated by the blower 56, and the first selection product and the additive can be mixed and conveyed in the pipe 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. There may be.

  As the additive supply unit 52, a screw feeder as shown in FIG. 1 or a disk feeder (not shown) is used. The additive supplied from the additive supply unit 52 includes a resin for binding a plurality of fibers. At the time when the resin is supplied, the plurality of fibers are not bound. The resin melts when passing through the sheet forming portion 80 and binds a plurality of fibers.

  The resin supplied from the additive supply unit 52 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, polybutylene terephthalate, nylon, polyamide, polycarbonate, polyacetal, polyphenylene sulfide, polyether ether ketone, and the like. These resins may be used alone or in combination. The additive supplied from the additive supply unit 52 may be fibrous or powdery.

  In addition to the resin that binds the fibers, the additive supplied from the additive supply unit 52 includes a colorant for coloring the fibers, a fiber agglomeration, and a resin, depending on the type of sheet to be manufactured. An agglomeration inhibitor for suppressing agglomeration of the resin and a flame retardant for making the fiber difficult to burn may be included. The mixture (mixture of the first selection product and the additive) that has passed through the mixing unit 50 is transferred to the deposition unit 60 via the pipe 54.

  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.

  As the deposition unit 60, a rotating cylindrical sieve unit 61 is used. The sieve of the deposition unit 60 has a net, and allows fibers or particles (those that pass through the net) included in the mixture that has passed through the mixing unit 50 to be smaller than the mesh opening size. The configuration of the deposition unit 60 is the same as the configuration of the sorting unit 40, for example.

  It should be noted that the “sieving” of the depositing unit 60 may not have a function of selecting a specific object. That is, the “sieving” used as the depositing unit 60 means that the net is provided, and the depositing unit 60 may drop all of the mixture introduced into the depositing unit 60.

  The second web forming unit 70 forms the web W by depositing the passing material (material containing fibers) that has passed through the deposition unit 60. The second web forming unit 70 has a deposition surface 72a on which the passing material is deposited as the web W, and a mesh belt 72 constituting a transport unit 700 (see FIG. 2) for transporting the deposited web W, and a stretching roller 74. And a suction mechanism 76 as a suction portion.

  While moving, the mesh belt 72 accumulates the passing material that has passed through the opening of the accumulation unit 60 (the opening of the mesh). The mesh belt 72 is stretched by a stretching roller 74, and is configured to allow air to pass therethrough. The mesh belt 72 moves as the stretching roller 74 rotates. While the mesh belt 72 continuously moves, the passing material that has passed through the accumulation section 60 is continuously piled up, whereby the web W is formed on the mesh belt 72. The mesh belt 72 is made of, for example, metal, resin, cloth, or non-woven fabric.

  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 can generate an air flow directed downward (air flow directed from the accumulation unit 60 toward the mesh belt 72). By the suction mechanism 76, the mixture dispersed in the air by the deposition unit 60 can be sucked onto the mesh belt 72. Thereby, the discharge speed from the deposition part 60 can be increased. 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.

  As described above, by passing through the deposition part 60 and the second web forming part 70, the web W in a state of being soft and swelled with a lot of air is formed. The web W deposited on the mesh belt 72 is conveyed to the sheet forming unit 80.

  In the illustrated example, a humidity control unit 78 that adjusts the humidity of the web W is provided. The humidity control unit 78 can adjust the quantity ratio between the web W and water by adding water or water vapor to the web W.

  The sheet forming unit 80 forms the sheet S by pressurizing and heating the web W deposited on the mesh belt 72. In the sheet forming unit 80, heat is applied to the mixture of the defibrated material and the additive mixed in the web W to bind the plurality of fibers in the mixture to each other via the additive (resin). Can do.

  The sheet forming unit 80 includes a pressurizing unit 82 that pressurizes the web W, and a heating unit 84 that heats the web W pressed by the pressurizing unit 82. The pressurizing unit 82 includes a pair of calendar rollers 85 and applies pressure to the web W. When the web W is pressed, its thickness is reduced, and the density of the web W is increased. As the heating unit 84, for example, a heating roller (heater roller), a hot press molding machine, a hot plate, a hot air blower, an infrared heater, or a flash fixing device is used. In the illustrated example, the heating unit 84 includes a pair of heating rollers 86. By forming the heating unit 84 as the heating roller 86, the sheet S is formed while the web W is continuously conveyed as compared to the case where the heating unit 84 is configured as a plate-like pressing device (flat plate pressing device). Can do. Here, the calendar roller 85 (pressure unit 82) can apply a pressure higher than the pressure applied to the web W by the heating roller 86 (heating unit 84). The number of calendar rollers 85 and heating rollers 86 is not particularly limited.

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

  Thus, a single-sheet sheet S having a predetermined size is formed. The cut sheet S is discharged to the discharge unit 96.

  Next, a detailed configuration around the deposition part will be described. FIG. 2 is a schematic view showing a configuration around the deposition portion according to the present embodiment, and FIG. 3 is a partially enlarged view showing a configuration around the deposition portion according to the present embodiment.

  As shown in FIGS. 2 and 3, the sheet manufacturing apparatus 100 includes a sieve part 61 having a plurality of openings, and a first housing part 600 (housing part) that covers the sieve part 61. Further, below the depositing unit 60, a conveyance unit 700 is arranged in which a material containing fibers that have passed through the opening of the sieve unit 61 accumulates as a web W and conveys the deposited web W. A first roller 650 that contacts the web W conveyed by the conveyance unit 700 is disposed. Further, a suction mechanism 76 for sucking the material containing the fibers onto the mesh belt 72 is disposed.

  The sieve portion 61 has a rotatable cylindrical portion, and a plurality of openings through which a material containing at least fibers passes in the air are formed in the cylindrical portion. The plurality of openings are arranged at equal intervals with the same size (area). When passing through the opening, the entangled fibers are loosened, and the material passing through the opening is deposited on the mesh belt 72 with a uniform thickness and density. The size of the opening and the like can be appropriately set depending on the size and type of the material to be passed.

  The first housing part 600 has a frame body 601 and has a space part inside. The sieve part 61 is covered (enclosed) by the first housing part 600 by being disposed in the frame body 601. Further, the lower portion of the first housing portion 600 has no wall surface and is provided with an open port 602.

  The transport unit 700 is a partial configuration of the second web forming unit 70 and includes a mesh belt 72 and a stretching roller 74.

  A first roller 650 that contacts the web W conveyed by the mesh belt 72 is provided downstream of the first housing portion 600 in the conveyance direction of the web W (the white arrow in FIG. 2). The first side wall 600 a of the first housing portion 600 is provided with a first seal portion 610 that contacts the outer peripheral surface of the first roller 650. The first side wall 600a includes an outer surface, an inner surface, and an end surface (a surface facing the mesh belt 72). In addition, the 1st seal | sticker part 610 of this embodiment is provided in the outer surface of the 1st side wall 600a.

  The first roller 650 faces the accumulation surface 72 a of the mesh belt 72 and abuts on the web W conveyed by the conveyance unit 700. The first roller 650 has a rotation axis A in a direction that intersects the conveyance direction of the web W by the conveyance unit 700. In this embodiment, the 1st roller 650 is arrange | positioned so that the rotating shaft A may become the direction orthogonal to the conveyance direction of the web W (width direction of the web W). The first roller 650 has a length equivalent to the width of the mesh belt 72 (the length in the direction perpendicular to the conveyance direction of the web W). Thereby, the 1st roller 650 can contact | abut over the whole width direction of the web W. FIG. The first roller 650 is connected to a drive unit (not shown) such as a motor that drives the first roller 650. The first roller 650 can be rotated about the rotation center axis (counterclockwise in FIG. 2) by driving the drive unit. The first roller 650 is movable in the vertical direction (the direction intersecting the deposition surface 72a of the mesh belt 72 or the thickness direction of the web W) and is moved downward (mesh belt) by a biasing member (not shown). 72 side).

  The first seal portion 610 is, for example, a pile seal, and a plurality of fibers are densely planted on one side of the base portion. In the first seal portion 610, the other surface of the base portion is bonded to the outer surface of the first side wall 600 a of the first housing portion 600, and the tip portion of the fiber is in contact with the outer peripheral surface of the first roller 650. Here, a region where the first roller 650 and the first seal portion 610 are in contact with each other is a straight line (plane) parallel to the deposition surface 72a through the rotation axis A of the first roller 650 and the outer peripheral surface of the first roller 650. A region including a contact (tangent). As a result, the gap between the outer surface of the first side wall 600 a of the first housing part 600 and the first roller 650 is substantially closed by the first seal part 610. Further, even when the first roller 650 rotates and the first roller 650 and the first seal portion 610 slide, generation of wear and frictional force are generated as compared with the case where a foamed sponge or the like is used as the first seal portion 610. It is suppressed and the drive load of the 1st roller 650 can be reduced. The fiber length of the first seal portion 610 is set so that the first seal portion 610 is surely in contact with the first roller 650. For example, the distance is set to be longer than the distance between the first side wall 600 a of the first housing part 600 and the outer peripheral surface of the first roller 650.

  Further, a roller 651 is disposed on the upstream side of the first roller 650 in the conveyance direction of the web W. A second seal portion 620 that contacts the roller 651 is provided on the second side wall 600 b facing the first side wall 600 a of the first housing portion 600. The second seal portion 620 of the present embodiment is configured in the same manner as the first seal portion 610, and is provided on the outer surface of the second side wall 600b. The fiber tip of the second seal portion 620 is in contact with the outer peripheral surface of the roller 651.

  As shown in FIG. 2, the roller 651 has a rotation center axis in a direction that intersects the conveyance direction of the web W. In the present embodiment, the roller 651 is arranged so that the rotation center axis thereof is parallel to the rotation axis A of the first roller 650. The roller 651 has a length equivalent to the width of the mesh belt 72.

  The roller 651 is connected to a drive unit (not shown) such as a motor that drives the roller 651. Then, by driving the drive unit, the roller 651 can be rotated around the rotation center axis (counterclockwise direction in FIG. 2). The roller 651 is disposed so as to be in contact with the accumulation surface 72a of the mesh belt 72.

  Further, side seal portions (not shown) in contact with the mesh belt 72 are provided on the side surfaces of the first housing portion 600 other than the first side wall 600a and the second side wall 600b. The side seal portion is a pile seal, for example, and is configured in the same manner as the seal portions 610 and 620. Thereby, the periphery of the opening 602 of the first housing part 600 is almost closed.

  The suction mechanism 76 has a second housing part 760 for defining a suction region for sucking the material that has passed through the opening of the sieve part 61. A roller 652 that abuts on the mesh belt 72 is provided at a position facing the first roller 650 with the mesh belt 72 interposed therebetween. Furthermore, a third seal portion 630 that is provided in the second housing portion 760 and is in contact with the outer peripheral surface of the roller 652 is provided.

  The third seal portion 630 is provided on the side wall 760 a on one side (downstream side in the conveyance direction of the web W) of the second housing portion 760, and is in contact with the outer peripheral surface of the roller 652. The side wall 760a includes an outer surface, an inner surface, and an end surface (a surface facing the mesh belt 72) of the second housing part 760. In addition, the 3rd seal | sticker part 630 of this embodiment is provided in the outer surface of the side wall 760a.

  The roller 652 has a rotation center axis in a direction intersecting with the conveyance direction of the web W. The roller 652 has a length equivalent to the width of the mesh belt 72. The roller 652 is a driven roller that rotates around the rotation center axis (clockwise in FIG. 2) as the mesh belt 72 moves.

  Further, the roller 652 is disposed with the position of the rotation center axis fixed so as to contact the inner side surface 72b of the mesh belt 72 (the back surface of the accumulation surface 72a). As a result, the first roller 650 is supported by the roller 652 via the web W and the mesh belt 72 even when a load is applied in the direction of gravity. Further, the position of the mesh belt 72 is regulated by the roller 652. Accordingly, the mesh belt 72 does not fall downward due to the pressure by the first roller 650 or gravity, and the posture of the accumulation surface 72a of the mesh belt 72 is maintained in a substantially horizontal direction.

  A roller 653 that contacts the mesh belt 72 is provided at a position facing the roller 651 with the mesh belt 72 interposed therebetween. In addition, a fourth seal portion 640 provided in the second housing portion 760 and in contact with the outer peripheral surface of the roller 653 is provided.

  The fourth seal portion 640 is provided on the side wall 760 b (on the upstream side in the conveyance direction of the web W) facing the side wall 760 a of the second housing portion 760, and is in contact with the outer peripheral surface of the roller 653. The side wall 760b includes an outer surface, an inner surface, and an end surface (a surface facing the mesh belt 72) of the second housing part 760. In addition, the 4th seal | sticker part 640 of this embodiment is provided in the outer surface of the side wall 760b.

  The roller 653 has a rotation center axis in a direction that intersects the conveyance direction of the web W. The roller 653 has a length equivalent to the width of the mesh belt 72. The roller 653 is a driven roller that rotates around the rotation center axis (clockwise direction in FIG. 2) as the mesh belt 72 moves.

  Further, the roller 653 is disposed with the position of the rotation center axis fixed so as to contact the inner surface 72 b of the mesh belt 72. Accordingly, the roller 651 is supported by the roller 653 via the mesh belt 72 even when a load is applied in the direction of gravity. Further, the position of the mesh belt 72 is regulated by the roller 653. Therefore, the mesh belt 72 does not fall downward due to the pressure by the roller 651 or gravity, and the posture of the accumulation surface 72a of the mesh belt 72 is maintained in a substantially horizontal direction.

  Here, as shown in FIG. 3, the radius R <b> 1 of the first roller 650 is set to be larger than the thickness L <b> 1 of the web W before contacting the first roller 650. The passing material that has passed through the opening of the sieve portion 61 is accumulated on the accumulation surface 72a of the mesh belt 72. However, since the mesh belt 72 is moving, the inside of the first housing portion 600 including the first seal portion 610 is moved. The thickness of the web W on the downstream side in the transport direction is the largest. That is, the thickness L1 of the web W immediately before contacting the first roller 650 is the largest. Further, since the thickness L1 of the web W corresponds to the thickness of the sheet S to be manufactured, for example, when manufacturing a thick sheet S used for a business card or the like, plain paper (for example, a general copy machine or a printer) It is necessary to increase the thickness L1 of the web W by increasing the deposition amount of the material in the deposition portion 60, compared with the case of manufacturing a relatively thin sheet S equivalent to general purpose paper. At this time, for example, if the radius R1 of the first roller 650 is smaller than the thickness L1 of the web W, it becomes difficult to transport the upper portion of the deposited web W, and the first housing portion 600 has In some cases, the web W may stay or jump up, and the web W may be disturbed during conveyance. In the present embodiment, by making the radius R1 of the first roller 650 larger than the thickness L1 of the web W, the transportability of the web W can be improved and the disturbance of the web W can be suppressed.

  Next, the conveyance operation of the web W will be described. As shown in FIG. 3, when the sheet manufacturing apparatus 100 is driven, a material including fibers that have passed through the opening of the sieve unit 61 of the deposition unit 60 is deposited on the mesh belt 72. The deposited material (web W) is conveyed by the movement of the mesh belt 72 and comes into contact with the first roller 650. The web W in contact with the first roller 650 is sandwiched and conveyed by the mesh belt 72 and the first roller 650. Here, since the radius R1 of the first roller 650 is larger than the thickness L1 of the web W, the upper portion of the web W that is in contact with the first roller 650 is drawn by the first roller 650 downstream in the transport direction. It becomes easy and it can convey, without disturbing the web W. And the web W which passed the 1st roller 650 becomes thickness corresponding to the space | interval L2 of the outer peripheral surface of the 1st roller 650, and the deposition surface 72a, and is thicker than thickness L1 of the web W in the inside of the 1st housing part 600. It is transported in a thin and dense state.

  As described above, according to the present embodiment, the following effects can be obtained.

Since the radius R1 of the first roller 650 is larger than the thickness L1 of the web W before contacting the first roller 650, the thickness when the web W deposited by the deposition unit 60 contacts the first roller 650 is thicker. The material above the web W at the length L1 is easily drawn by the rotation of the first roller 650. Accordingly, the stay of the web W on the upstream side in the transport direction of the first roller 650 can be prevented, the transportability of the web W can be improved, and the disturbance of the web W when passing through the first roller 650 can be suppressed.
Further, only in the first roller 650, the radius R1 was made larger than the thickness L1 of the web W, and the radii of the other rollers 651, 652, 653 were made smaller than the radius R1 of the first roller 650. Thereby, the stacking unit 60 and the second web forming unit 70 can be downsized, and the sheet manufacturing apparatus 100 can be downsized.

(Second Embodiment)
Next, a second embodiment will be described. Since the basic configuration of the sheet manufacturing apparatus is the same as that of the first embodiment, a description thereof will be omitted, and a different configuration, that is, a configuration around the deposition unit will be described. FIG. 4 is a partially enlarged view showing a configuration around the deposition portion according to the present embodiment.

  As shown in FIG. 4, the sheet manufacturing apparatus 100 a includes a sieve unit 61 (see FIG. 2), a first housing unit 600, and a transport unit 700, as with the sheet manufacturing apparatus 100 of the first embodiment. ing.

  As shown in FIG. 4, in the first roller 650a in the present embodiment, the distance L2 between the outer peripheral surface of the first roller 650a and the deposition surface 72a is equal to the distance L3 between the first housing portion 600 and the deposition surface 72a. It arrange | positions so that it may become smaller than the smaller one of the space | interval L4 of the seal part 610 and the deposition surface 72a.

  Specifically, the interval L2 is the outer peripheral surface of the first roller 650a and is the interval between the lowermost end portion of the first roller 650a and the deposition surface 72a. The interval L3 is an interval between the lowermost end portion of the frame body 601 of the housing portion 600 and the deposition surface 72a. The interval L4 is the interval between the lowermost end portion of the first seal portion 610 and the deposition surface 72a.

  The thickness L1 of the web W immediately before coming into contact with the first roller 650a is defined (regulated) by the lowermost end portion of the frame body 601 of the first housing portion 600 or the lowermost end portion of the first seal portion 610, and is the maximum. However, it is the same as the smaller one of the intervals L3 and L4. By making the interval L2 smaller than the intervals L3 and L4, the thickness of the web W conveyed by the first roller 650a can be reduced and the density can be increased.

  Further, the first roller 650a has an interval L5 (the height from the accumulation surface 72a) L5 between the rotation axis A and the accumulation surface 72a, an interval L3 between the first housing portion 600 and the accumulation surface 72a, and the first seal portion 610. And the distance L4 between the surface and the deposition surface 72a, which is larger than the smaller one. That is, the rotation axis A of the first roller 650a is located above the top (upper surface) of the web W having a thickness L1. For this reason, the material of the upper part of the web W which contact | abutted to the 1st roller 650 becomes easy to be drawn in the conveyance direction downstream by the 1st roller 650a, and it can convey without disturbing the web W. The web W that has passed through the first roller 650a has a thickness corresponding to the distance L2 between the outer peripheral surface of the first roller 650a and the deposition surface 72a, and is greater than the thickness L1 of the web W inside the first housing portion 600. It is transported in a thin and dense state.

  As described above, according to the present embodiment, the following effects can be obtained.

  Since the rotation axis A of the first roller 650a is positioned above the thickness L1 of the web W immediately before contacting the first roller 650a, the web W deposited by the deposition unit 60 contacts the first roller 650a. When it does, the material above the web W in thickness L1 becomes easy to be drawn in by rotation of the 1st roller 650a. Accordingly, the stay of the web W on the upstream side in the transport direction of the first roller 650a can be prevented, the transportability of the web W can be improved, and the disturbance of the web W when passing through the first roller 650a can be suppressed.

(Third embodiment)
Next, a third embodiment will be described. Since the basic configuration of the sheet manufacturing apparatus is the same as that of the first embodiment, a description thereof will be omitted, and a different configuration, that is, a configuration around the deposition unit will be described. FIG. 5 is a partially enlarged view showing a configuration around the deposition portion according to the present embodiment.

  As shown in FIG. 5, the sheet manufacturing apparatus 100 b includes a sieve unit 61 (see FIG. 2), a first housing unit 600, and a conveyance unit 700, as with the sheet manufacturing apparatus 100 of the first embodiment. ing.

  In the present embodiment, the control unit 104 (see FIG. 1) changes the position of the first roller 650b with respect to the deposition surface 72a according to the thickness L1 of the web W on the deposition surface 72a of the transport unit 700. The control unit 104 changes the position of the first roller 650b so that the height L5 of the rotation axis A is higher than the thickness L1 of the web W just before contacting the first roller 650b.

  The sheet manufacturing apparatus 100b includes a detector 800 that detects the thickness L1 of the web W on the deposition surface 72a. That is, the detector 800 is disposed in the vicinity of the first roller 650b and on the upstream side in the transport direction, and detects the thickness L1 of the web W immediately before coming into contact with the first roller 650b. The detector 800 is electrically connected to the control unit 104 and transmits data relating to the detected thickness of the web W (hereinafter referred to as thickness data) to the control unit 104. The control unit 104 controls the first roller 650b based on the detection result (thickness data) by the detector 800 and changes its position (height).

  The detector 800 can use various sensors such as an ultrasonic level sensor and a line laser sensor. When an ultrasonic level sensor is used, the ultrasonic wave is arranged on the side surface of the web W on which the ultrasonic wave oscillating portion is deposited, the ultrasonic wave is oscillated toward the web W, and the ultrasonic wave reflected from the web W is received. The thickness L1 can be detected. When a line laser sensor is used, a light emitting unit that emits laser light is arranged on one side in the width direction of the web W, and a receiving unit that receives laser light emitted from the light emitting unit is arranged on the other side. The thickness L1 of the web W can be detected by the reception state of the laser beam by the receiving unit.

  Next, the configuration of the position changing mechanism that changes the position of the first roller 650b will be described. FIG. 6 is a schematic diagram showing the configuration of the position changing mechanism according to the present embodiment. As shown in FIG. 6, the position changing mechanism 900 according to the present embodiment includes a cam mechanism 901. The cam mechanism 901 includes a rotatable rotating shaft 902 and a disc portion 904 that is attached to the rotating shaft 902 and has a curved surface 903 corresponding to the rotation angle of the rotating shaft 902. And the curved surface 903 and the rotating shaft part 690 of the 1st roller 650b contact | abut, and the curved surface 903 supports the rotating shaft part 690 of the 1st roller 650b. When the disc portion 904 rotates, the rotation shaft portion 690 of the first roller 650b moves in the vertical direction (perpendicular to the deposition surface 72a) along the curved surface 903 of the disc portion 904. Note that the first roller 650b and the first seal portion 610 are in contact with each other within a range in which the first roller 650b can move. That is, the first seal portion 610 passes between the rotation axis A of the first roller 650b and is parallel to the deposition surface 72a and the outer peripheral surface of the first roller 650b regardless of the position of the first roller 650b. It is provided so that it may contact in the area | region containing a contact (tangent). As a result, the gap between the outer surface of the first side wall 600 a of the first housing part 600 and the first roller 650 b is almost closed by the first seal part 610.

  The control unit 104 controls the first roller 650b based on the detection result (thickness data) by the detector 800. Specifically, the position of the first roller 650b is changed so that the position of the first roller 650b (the height L5 of the rotation axis A) is higher than the thickness L1 of the web W. As shown in FIG. 6, when the rotating shaft 902 of the cam mechanism 901 is driven to rotate the disc portion 904, the rotating shaft portion 690 of the first roller 650b is moved along the curved surface 903 of the disc portion 904, and The position of one roller 650b is changed. For example, when the thickness L1 of the web W is thick, the control unit 104 drives the cam mechanism 901 to change the position of the rotation axis A from the height L5b to the upper height L5a. As a result, when the web W accumulated inside the first housing portion 600 comes into contact with the first roller 650b, the material of the upper portion of the web W is drawn by the first roller 650b to the downstream side in the transport direction by the first roller 650b. It becomes easy and it can convey, without disturbing the web W.

  As described above, according to the present embodiment, the following effects can be obtained.

The height L5 of the rotation axis A with respect to the deposition surface 72a is controlled to be higher than the thickness L1 of the web W. For this reason, the conveyance property of the web W improves and the disorder of the web W at the time of passing the 1st roller 650b can be suppressed.
Further, by detecting the thickness L1 of the web W by the detector 800, the position of the first roller 650b can be changed (controlled) with higher accuracy.

In the present embodiment, the position changing mechanism 900 that changes the position of the first roller 650b has been described as the cam mechanism 901, but is not limited to this configuration. FIG. 7 is a schematic diagram showing the configuration of another position changing mechanism. As shown in FIG. 7, the position changing mechanism 900 may be a slide mechanism 910. The slide mechanism 910 includes a ball screw shaft 911, a ball nut 912, an arm portion 913 connected to the ball nut 912, and the ball nut 912 in a moving direction (vertical direction in the present embodiment) with respect to the ball screw shaft 911. And a guide portion (not shown) for guiding. In addition, a motor (not shown) is connected to the ball screw shaft 911. In addition, one end portion of the arm portion 913 is connected to the rotation shaft portion 690 of the first roller 650b. The motor is driven and controlled by the control unit 104 and is transmitted to the ball screw shaft 911 by driving the motor. Thereby, the ball screw shaft 911 rotates, and the arm portion 913 connected to the ball nut 912 moves in the direction of the ball screw shaft 911 (vertical direction). In connection with this, the 1st roller 650b connected to the arm part 913 can be moved to an up-down direction. Even with such a configuration, the same effect as described above can be obtained.
In addition, the position changing mechanism 900 according to the present embodiment is configured to move the rotation shaft portion 690 of the first roller 650b. However, the position changing mechanism 900 is configured to move the holding portion (not shown) that holds the rotation shaft portion 690. You may comprise so that the position of the roller 650b may be changed.

  In addition, the detector 800 of the present embodiment is configured to detect the side surface portion of the deposited web W, but is not limited to this configuration. FIG. 8 is a schematic diagram showing the configuration of another detector. As shown in FIG. 8, the detector 801 may be a displacement sensor. In this case, the detector 801 is disposed between the housing part 600 and the first seal part 610. And the detector 801 can acquire the data regarding the distance of the detector 801 and the top part of the web W by irradiating a laser beam toward the top part (upper surface) of the web W, and receiving the reflected laser beam. it can. The control unit 104 can obtain the thickness L1 of the web W by subtracting the distance between the detector 801 and the top of the web W from the distance between the detector 801 and the deposition surface 72a. Even with such a configuration, the same effect as described above can be obtained.

(Fourth embodiment)
Next, a fourth embodiment will be described. Since the basic configuration of the sheet manufacturing apparatus is the same as that of the first embodiment, a description thereof will be omitted, and a different configuration, that is, a configuration around the deposition unit will be described. FIG. 9 is a partially enlarged view showing the configuration around the deposition portion according to the present embodiment.

  As shown in FIG. 9, the sheet manufacturing apparatus 100 c includes a sieve unit 61 (see FIG. 2), a first housing unit 600, and a conveyance unit 700, as with the sheet manufacturing apparatus 100 of the first embodiment. ing.

  In the present embodiment, the control unit 104 (see FIG. 1) changes the load of the first roller 650c according to the thickness L1 of the web W on the deposition surface 72a of the transport unit 700. When the thickness L1 of the web W is large, the control unit 104 makes the load of the first roller 650c smaller than when the thickness L1 of the web W is small.

  Similar to the sheet manufacturing apparatus 100b of the third embodiment, the sheet manufacturing apparatus 100c includes a detector 800 that detects the thickness L1 of the web W on the deposition surface 72a of the transport unit 700. The control unit 104 controls the first roller 650c based on the detection result (thickness data) by the detector 800 and changes the load (pressing force).

  Next, the configuration of the load changing mechanism that changes the load of the first roller 650c will be described. As shown in FIG. 9, the load changing mechanism 950 according to this embodiment includes a cam mechanism 901 and a spring 920. Since the basic structure of the cam mechanism 901 is the same as that of the third embodiment, description thereof is omitted. The spring 920 is, for example, a compression coil spring. One end of the spring 920 is disposed so as to be able to always contact the curved surface 903 of the cam mechanism 901, and the other end of the spring 920 is fixed to the rotating shaft 690 of the first roller 650c. When the disc portion 904 rotates, the spring 920 compresses or extends, and the load (biasing force) on the rotating shaft portion 690 increases or decreases. Thereby, the load (pressing force) with respect to the web W of the 1st roller 650c can be changed. By driving the cam mechanism 901 so that the spring 920 is compressed, the force for urging the rotating shaft portion 690 of the first roller 650c upward increases. Thereby, the load with respect to the web W of the 1st roller 650c reduces. On the other hand, by driving the cam mechanism 901 so that the spring 920 extends, the force for urging the rotating shaft portion 690 of the first roller 650c upward is reduced (the force for urging downward is increased). Thereby, the load with respect to the web W of the 1st roller 650c increases.

  The control unit 104 controls the first roller 650c based on the detection result (thickness data) by the detector 800. Specifically, when the thickness L1 of the web W is large, the load of the first roller 650c is changed so that the load on the web W of the first roller 650c is smaller than when the thickness L1 of the web W is small. . For example, when the thickness L1 of the web W is thick, the cam mechanism 901 is driven in the direction in which the spring 920 compresses to reduce the load on the web W of the first roller 650c. Accordingly, the web W is easy to pass by pushing up the first roller 650c, and is conveyed without being disturbed.

  As described above, according to the present embodiment, the following effects can be obtained.

Since the load of the first roller 650c on the web W is controlled according to the thickness L1 of the web W, the disturbance of the web W when passing through the first roller 650c is suppressed regardless of the thickness L1 of the web W. be able to.
Further, by detecting the thickness of the web W, the load of the first roller 650c can be changed (controlled) with higher accuracy.

  In the present embodiment, the load changing mechanism 950 that changes the load of the first roller 650c has been described as a configuration including the cam mechanism 901 and the spring 920, but is not limited to this configuration. FIG. 10 is a schematic diagram showing the configuration of another load changing mechanism. As shown in FIG. 10, the load changing mechanism 950 may include a slide mechanism 910 and a spring 920. Note that the slide mechanism 910 has the same configuration as that of the third embodiment, and a description thereof will be omitted. The spring 920 is, for example, a tension coil spring, and one end portion of the spring 920 is connected to the arm portion 913, and the other end portion of the spring 920 is connected to the rotating shaft portion 690 of the first roller 650c. When the slide mechanism 910 is driven to move the arm portion 913 in the vertical direction, the spring 920 is compressed or extended, and the load on the rotating shaft portion 690 increases or decreases. Thereby, the load with respect to the web W of the 1st roller 650c can be changed. By moving the arm portion 913 upward so that the spring 920 extends, the force that biases the rotating shaft portion 690 of the first roller 650c upward increases. Thereby, the load with respect to the web W of the 1st roller 650c reduces. On the other hand, by moving the arm portion 913 downward so that the spring 920 compresses, the force that biases the rotating shaft portion 960 of the first roller 650c downward increases. Thereby, the load with respect to the web W of the 1st roller 650c increases. Even with such a configuration, the same effect as described above can be obtained.

(Fifth embodiment)
Next, a fifth embodiment will be described. Since the basic configuration of the sheet manufacturing apparatus is the same as that of the first embodiment, a description thereof will be omitted, and a different configuration, that is, a configuration around the deposition unit will be described. FIG. 11 is a partially enlarged view showing the configuration around the deposition portion according to the present embodiment.

  As illustrated in FIG. 11, the sheet manufacturing apparatus 100 d includes a sieve unit 61 (see FIG. 2), a first housing unit 600, and a conveyance unit 700, similarly to the sheet manufacturing apparatus 100 of the first embodiment. ing.

  In this embodiment, it has the 2nd roller 654 which opposes the deposition surface 72a, is located in the downstream of a conveyance direction rather than the 1st roller 650d, and contact | abuts the web W, and has the 2nd roller 654 and the deposition surface 72a. The interval L6 is smaller than the interval L2 between the first roller 650d and the deposition surface 72a. The configuration of the first roller 650d is the same as that of the first roller 650 of the first embodiment, and a description thereof will be omitted.

  The second roller 654 has a rotation axis B in a direction intersecting the conveyance direction of the web W by the conveyance unit 700. In the present embodiment, the second roller 654 is disposed so that the rotation axis A thereof is parallel to the rotation axis A of the first roller 650. The second roller 654 has a length equivalent to the width of the mesh belt 72. Thereby, the second roller 654 can come into contact with the entire width direction of the web W. The second roller 654 is connected to a drive unit (not shown) such as a motor that drives the second roller 654. Then, the second roller 654 can be rotated around the rotation center axis (counterclockwise in FIG. 11) by driving the drive unit.

  Further, a support roller 655 that contacts the mesh belt 72 is provided at a position facing the second roller 654 with the mesh belt 72 interposed therebetween. The support roller 655 has a rotation center axis in a direction intersecting with the web W conveyance direction. Further, the support roller 655 has a length equivalent to the width of the mesh belt 72. The support roller 655 is a driven roller that rotates around the rotation center axis (clockwise in FIG. 11) as the mesh belt 72 moves.

  Further, the support roller 655 is arranged with the position of the rotation center axis fixed so as to contact the inner side surface 72 b of the mesh belt 72. As a result, the second roller 654 is supported by the support roller 655 via the web W and the mesh belt 72 even when a load is applied in the direction of gravity. Further, the position of the mesh belt 72 is regulated by the support roller 655. Accordingly, the mesh belt 72 does not fall downward due to the pressure by the second roller 654 or gravity, and the posture of the accumulation surface 72a of the mesh belt 72 is maintained in a substantially horizontal direction.

  In the present embodiment, the radius R2 of the second roller 654 is smaller than the radius R1 of the first roller 650d. Thereby, the stacking unit 60 and the second web forming unit 70 can be downsized, and the sheet manufacturing apparatus 100d can be downsized.

  In the present embodiment, the control unit 104 (see FIG. 1) changes the position of the second roller 654 relative to the deposition surface 72a based on the position of the first roller 650d. The controller 104 changes the position of the second roller 654 so that the distance L6 between the second roller 654 and the deposition surface 72a is smaller than the distance L2 between the first roller 650d and the deposition surface 72a.

  The sheet manufacturing apparatus 100d includes a detector 800a that detects the thickness L2 of the web W on the deposition surface 72a. The detector 800a is disposed between the first roller 650d and the second roller 654 in the conveyance path of the web W, and detects the thickness of the web W conveyed by the first roller 650d. The detector 800 a is electrically connected to the control unit 104, and transmits the detected web W thickness data to the control unit 104. The control unit 104 controls the second roller 654 based on the detection result (thickness data) by the detector 800a and changes its position (height). The configuration of the detector 800a is the same as that of the detector 800 of the third embodiment, and a description thereof will be omitted.

  In addition, a position changing mechanism (not shown) that changes the position of the second roller 654 is disposed in the sheet manufacturing apparatus 100d. Note that the position changing mechanism for changing the position of the second roller 654 is the same as the position changing mechanism 900 of the third embodiment, and thus the description thereof is omitted.

  Next, the conveyance operation of the web W of this embodiment is demonstrated. As shown in FIG. 11, when the sheet manufacturing apparatus 100 d is driven, a material containing fibers is deposited on the mesh belt 72 from the opening of the sieve unit 61 of the deposition unit 60. The deposited material (web W) is conveyed by the movement of the mesh belt 72 and comes into contact with the first roller 650d. The web W in contact with the first roller 650d is sandwiched and conveyed by the mesh belt 72 and the first roller 650d. The web W having the thickness L1 immediately before coming into contact with the first roller 650d is pressed by the first roller 650d, and has a thickness corresponding to the distance L2 between the outer peripheral surface of the first roller 650d and the deposition surface 72a. Densified and conveyed downstream. The thickness of the web W that has passed through the first roller 650d is detected by the detector 800a, and the control unit 104 controls the second roller 654 based on the detection result (thickness data) by the detector 800a. Specifically, the position changing mechanism is driven so that the distance L6 between the second roller 654 and the deposition surface 72a is smaller than the distance L2 between the first roller 650d and the deposition surface 72a, and the second roller 654 is driven. (The position of the rotation axis B of the second roller 654) is changed. The web W pressed and conveyed by the first roller 650d is further pressed by the second roller 654 to have a thickness corresponding to the distance L6 between the second roller 654 and the deposition surface 72a, and is conveyed after being densified. The

  As described above, according to the present embodiment, the following effects can be obtained.

  When the web W comes into contact with the second roller 654 disposed downstream of the first roller 650d in the transport direction, the density of the web W is increased, and problems such as tearing can be suppressed.

  Moreover, since the position of the 2nd roller 654 is set according to the thickness of the web W which passed the 1st roller 650d, the web W can be pressurized in steps and a density can be raised. Moreover, the disturbance of the web W conveyed can be suppressed.

In the present embodiment, the second roller 654 is disposed on the downstream side in the transport direction with respect to the first roller 650d. However, the third roller may be disposed on the downstream side in the transport direction with respect to the second roller 654. Good. By arranging the third roller such that the distance between the third roller and the deposition surface 72a is smaller than the distance L6 between the second roller 654 and the deposition surface 72a, the density of the web W can be further increased. it can.
In the present embodiment, the thickness of the web W that has passed through the first roller 650d is obtained using the detector 800a. Instead, the height of the first roller 650d (for example, the height of the rotation axis A) is obtained. ) May be provided, and the second roller 654 may be controlled based on the height of the first roller 650d. Since the height of the first roller 650d (interval L2 with the deposition surface 72a) corresponds to the thickness of the web W that has passed through the first roller 650d, the height data of the first roller 650d is the thickness data of the web W. Can be substituted.

(Sixth embodiment)
Next, a sixth embodiment will be described. In 5th Embodiment, although the 1st roller and the 2nd roller were applied to the structure around a deposition part, this embodiment demonstrates the structure which applied the 1st roller etc. to the humidity control part. FIG. 12 is a partially enlarged view showing the configuration around the humidity control unit according to the present embodiment. Note that FIG. 12 shows a configuration in which the deposition portion is omitted.

  The humidity control unit 78 of the sheet manufacturing apparatus 100 e humidifies the web W deposited by the deposition unit 60. The humidity control unit 78 includes a generator 170, a third housing unit 172, a first airflow generation unit 176, and the like.

  The generator 170 is provided on the deposition surface 72 a side of the mesh belt 72. In FIG. 12, the generator 170 is provided outside the region surrounded by the mesh belt 72. The generator 170 generates droplets or high humidity gas. The generator 170 may generate droplets by ultrasonic waves. For example, the generator 170 may apply ultrasonic waves having a frequency of 20 kHz to several MHz to the solution (water) to generate minute droplets of several nm to several μm. The generator 170 may generate water vapor to generate a high humidity gas. Here, “high humidity gas” refers to a gas having a relative humidity of 70% to 100%.

  The third housing part 172 is connected to the generator 170 via a pipe 171. The third housing part 172 is provided on the deposition surface 72a side. The third housing portion 172 has, for example, a box shape and has an opening facing the deposition surface 72 a of the mesh belt 72. The third housing part 172 defines a humidification region for humidifying the web W. The humidity control unit 78 can humidify the web W deposited on the deposition surface 72a in the humidification region.

  A first roller 650d that contacts the web W conveyed by the mesh belt 72 is provided on the upstream side of the third housing portion 172 in the conveyance direction of the web W. A seal portion K1 is provided on the side wall of the third housing portion 172, and the seal portion K1 and the first roller 650d are in contact with each other.

  A second roller 654 is disposed on the downstream side of the first roller 650d in the conveyance direction of the web W. The second roller 654 is disposed on the downstream side of the third housing portion 172 so as to contact the web W conveyed by the mesh belt 72. A seal portion K2 is provided on the side wall of the third housing portion 172, and the seal portion K2 and the second roller 654 are in contact with each other. In the present embodiment, the distance L8 between the second roller 654 and the deposition surface 72a is smaller than the distance L7 between the first roller 650d and the deposition surface 72a. In addition, since the structure of the 1st roller 650d and the 2nd roller 654 is substantially the same as the structure of 5th Embodiment, description is abbreviate | omitted.

The first air flow generation unit 176 is provided on the inner side surface 72 b side of the mesh belt 72. In FIG. 12, the first airflow generation unit 176 is provided inside the region surrounded by the mesh belt 72. The first air flow generation unit 176 is disposed to face the third housing unit 172 with the mesh belt 72 interposed therebetween. The first airflow generation unit 176 generates an airflow that passes through the web W in the thickness direction. The airflow is an airflow in a direction intersecting with the deposition surface 72a, for example, an airflow in a direction orthogonal to the deposition surface 72a. For example, the first airflow generation unit 176 includes a fourth housing part 177 that is disposed below the mesh belt 72 and has an opening facing the inner side surface 72b, and a suction blower that sucks air inside the fourth housing part 177. Have. The first airflow generation unit 176 sucks the droplets generated by the generator 170 or the high-humidity gas from the inner surface 72b side.
The humidity control unit 78 can supply droplets or high-humidity gas to the web W by the air flow generated by the first air flow generation unit 176. Due to the airflow, the droplets or the high humidity gas passes through the web W in the thickness direction. The mass of the droplets supplied to the web W by the humidity control unit 78 is, for example, 0.1% or more and 3% or less of the mass of the web W per unit volume of the web W.

  A roller Pa that contacts the mesh belt 72 is provided at a position facing the first roller 650d with the mesh belt 72 interposed therebetween. The roller Pa is in contact with a seal portion K3 provided in the fourth housing portion 177. In addition, a roller Pb that contacts the mesh belt 72 is provided at a position facing the second roller 654 with the mesh belt 72 interposed therebetween. The roller Pb is in contact with a seal portion K4 provided in the fourth housing portion 177.

  As described above, according to the present embodiment, the following effects can be obtained.

  Since the web W comes into contact with the second roller 654 disposed downstream of the first roller 650d in the transport direction, the density of the conditioned web W is increased, and problems such as tearing can be suppressed.

  In addition, the structure of the 1st roller 650d and the 2nd roller 654 is not limited to the said structure, For example, the 1st roller 650d is arrange | positioned in the conveyance direction of the 1st housing part 600 of the deposition part 60, and humidity control is carried out. The structure which arrange | positions the 2nd roller 654 in the upstream of the conveyance direction of the 3rd housing part 172 of the part 78 may be sufficient. In this way, the configuration of the sheet manufacturing apparatus 100e can be simplified.

  In addition, this invention is not limited to embodiment mentioned above, It is possible to combine embodiment mentioned above and to add a various change, improvement, etc. A modification will be described below. Modifications may be combined.

  (Modification 1) In the third embodiment, the first roller 650b is controlled according to the thickness L1 of the web W deposited on the deposition surface 72a. However, the present invention is not limited to this. The sheet manufacturing apparatus according to the present modification has a deposition surface 72a on which a material containing fibers is deposited as a web W, and conveys the web W so as to face the deposition surface 72a of the conveyance unit 700. A first roller 650b that comes into contact with the web W conveyed by the unit 700, and has a rotation axis A in a direction that intersects the conveyance direction of the web W by the conveyance unit 700, and the thickness of the sheet S to be manufactured And a control unit 104 that changes the position of the first roller 650b with respect to the deposition surface 72a based on the information about the thickness of the sheet S received by the reception unit. When the thickness of the sheet S is the first thickness, the portion 104 positions the first roller 650b at the first height, and the thickness of the sheet S is thicker than the first thickness. When two thick, is positioned second height higher than the first roller 650b first height. The reception unit transmits information regarding the thickness of the sheet S to the control unit 104, and the configuration is not particularly limited. The reception unit is an input device such as a touch panel on which a user can input information related to the thickness of the sheet S, for example. In this way, when the thickness of the web W changes according to the thickness of the sheet S to be manufactured, the height of the first roller 650b is controlled. Thereby, disorder of the web W at the time of passing the 1st roller 650b can be suppressed.

  (Modification 2) In the third and fourth embodiments, the configuration in which the first rollers 650b and 650c are controlled based on the detection result by the detector 800 has been described as an example, but the present invention is not limited to this configuration. For example, a receiving unit that receives input of information regarding the thickness of the sheet to be manufactured may be included, and the control unit may control the first roller based on information regarding the thickness of the sheet. FIG. 13 is a schematic diagram illustrating a configuration example of a receiving unit according to the present modification.

  As illustrated in FIG. 13, the sheet manufacturing apparatus 100f includes a receiving unit 104a. The accepting unit 104a accepts input of information related to the thickness of the sheet S to be manufactured. The receiving unit 104a of the present embodiment is a touch panel that includes an input unit and an output unit (display unit). The accepting unit 104 a is electrically connected to the control unit 104.

  The information regarding the thickness of the sheet S according to this modification is input by inputting the manufacturing mode of the sheet S to be manufactured based on a preset control program. The production mode is prepared according to the thickness of the sheet S to be produced. In the example of FIG. 13, “plain paper mode” and “thick paper mode” are displayed on the touch panel as selectable manufacturing modes. Note that there may be three or more manufacturing modes. The user selects a desired mode and inputs it from the touch panel.

  The control unit 104 controls the first rollers 650b and 650c based on the input mode. For example, according to the selection of “plain paper mode” or “thick paper mode”, the position of the first roller 650b is moved to a specified position, or the load of the first roller 650c is set to a specified load.

  The thickness of the web W varies depending on the thickness of the sheet S to be manufactured. For example, when a thick paper thicker than plain paper is manufactured as the sheet S, the thickness L1 of the web W deposited on the deposition surface 72a is increased. Thus, since the thickness of the sheet S and the thickness L1 of the web W are correlated, even without the detector 800 that detects the thickness L1 of the web W, based on the thickness of the sheet S to be manufactured, The positions and loads of the first rollers 650b and 650c can be changed (controlled).

(Modification 3) In the third and fourth embodiments, the configuration in which the first rollers 650b and 650c are controlled based on the detection result by the detector 800 has been described as an example, but the present invention is not limited to this configuration. For example, the control unit 104 may control the first rollers 650b and 650c based on the conveyance speed of the web W by the conveyance unit 700.
When the moving speed of the mesh belt 72 decreases, the thickness L1 of the web W increases, and when the moving speed of the mesh belt 72 increases, the thickness L1 of the web W decreases. Therefore, when the moving speed of the mesh belt 72 is slow, the position of the first roller 650b is increased or the load of the first roller 650c is reduced. On the other hand, when the moving speed of the mesh belt 72 is fast, the position of the first roller 650b is lowered or the load of the first roller 650c is increased.
Thus, since the conveyance speed by the conveyance unit 700 and the thickness L1 of the web W to be accumulated are correlated, the conveyance speed by the conveyance unit 700 can be increased without the detector 800 or the like that detects the thickness L1 of the web W. Based on this, the positions and loads of the first rollers 650b and 650c can be changed (controlled).

In this case, since the conveyance speed (movement speed of the mesh belt 72) by the conveyance unit 700 and the production speed of the sheet S (ppm: the number of sheets that can be manufactured per minute) are correlated, based on the production speed information of the sheet S, The first rollers 650b and 650c may be controlled.
The production speed of the sheet S may affect the quality (basis weight, texture, etc.) of the sheet S. When the production speed is increased, the sheet quality is lowered, and when the production speed is lowered, the sheet quality is increased. Therefore, the reception unit 104a similar to the first and second modifications enables the selection and input of the quality of the sheet S from “low”, “medium”, and “high” as shown in FIG. The production rate of the sheet S is, for example, 16 sheets per minute (quality “low”), 12 sheets per minute (quality “medium”), and 8 sheets per minute (quality “high”).
In addition, the production speed of the sheet S may affect power consumption. Increasing the production speed increases the power consumption, and decreasing the production speed decreases the power consumption. Therefore, the receiving unit 104a similar to the first and second modifications enables the input mode of the sheet manufacturing apparatus to be selected from “low”, “medium”, and “high” as shown in FIG. The production rate of the sheet S is, for example, 8 sheets per minute (power consumption “low”), 12 sheets per minute (power consumption “medium”), and 16 sheets (power consumption “high”).
In this way, the information regarding the production speed of the sheet S (the quality of the sheet S to be manufactured and the power mode of the sheet manufacturing apparatus) is received by the receiving unit 104a and used instead of the transport speed of the web W by the transport unit 700. be able to. Note that the receiving unit 104a may be configured so that a numerical value (the number of sheets produced per unit time) can be input as information regarding the production speed of the sheet S.

(Modification 4) In the third and fourth embodiments, the configuration in which the first rollers 650b and 650c are controlled based on the detection result by the detector 800 has been described as an example, but the present invention is not limited to this configuration. For example, the material may include fibers obtained by defibrating the raw material supplied from the supply unit 10, and the control unit 104 may control the first rollers 650 b and 650 c based on the supply speed of the raw material by the supply unit 10. .
When the supply speed of the material by the supply unit 10 increases, the material to be supplied increases. Therefore, the thickness L1 of the web W increases, and when the supply speed of the material by the supply unit 10 decreases, the material to be supplied decreases. The thickness L1 of the web W is reduced. Therefore, when the supply speed is increased, the position of the first roller 650b is increased or the load of the first roller 650c is reduced. On the other hand, when the supply speed is slow, the position of the first roller 650b is lowered or the load of the first roller 650c is increased.
Thus, since the supply speed of the raw material by the supply unit 10 correlates with the thickness L1 of the web W to be deposited, the supply by the supply unit 10 is possible without the detector 800 or the like that detects the thickness L1 of the web W. Based on the speed, the positions and loads of the first rollers 650b and 650c can be changed (controlled).

  (Modification 5) In the second to fifth embodiments, the radius R1 of the first rollers 650a, 650b, 650c, 650d is larger than the radius of the other rollers 651, 652, 653, but is not limited thereto. The size of the radius R1 of the first rollers 650a, 650b, 650c, and 650d may be the same size as the other rollers 651, 652, and 653. Even if it does in this way, the effect similar to the above can be acquired.

  72 ... Mesh belt, 72a ... Stacking surface, 78 ... Humidity control unit, 100, 100a, 100b, 100c, 100d, 100e, 100f ... Sheet manufacturing apparatus, 102 ... Manufacturing unit, 104 ... Control unit, 104a ... Reception unit, 600 ... 1st housing part (housing part), 610 ... 1st sealing part (sealing part), 650, 650a, 650b, 650c, 650d ... 1st roller, 654 ... 2nd roller, 700 ... conveying part, 800, 800a, 801 ... Detector, 900 ... Position change mechanism, 950 ... Load change mechanism, W ... Web, A, B ... Rotating shaft, R1, R2 ... Radius.

According to this configuration, when the web deposited on the deposition surface is transported, it passes through the gap (gap) between the housing portion or the seal portion and the deposition surface, so the thickness of the web does not become larger than the gap. . Therefore, by disposing the rotation axis of the first roller above the interval, the transportability of the web can be improved and the web disturbance when passing through the first roller can be suppressed.
The sheet manufacturing apparatus according to this application example includes a housing portion that covers a sieve portion having a plurality of openings, and a deposition surface on which a material containing fibers that have passed through the openings is deposited as a web, and conveys the web. A conveying unit; a first roller that contacts the web conveyed by the conveying unit; and a driving unit that drives the first roller, wherein the first roller includes an outer peripheral surface of the first roller and the accumulation. The distance between the housing part and the deposition surface is smaller than the distance between the housing part and the deposition surface, and the distance between the rotation axis of the first roller and the deposition surface is larger than the distance between the housing part and the deposition surface. It is arranged so that it may be arranged.

According to this configuration, when the thickness of the web also changes according to the thickness of the sheet to be manufactured, the web is prevented from being disturbed when passing through the first roller by controlling the height of the first roller. Can do.
Further, in the sheet manufacturing apparatus according to the application example, the transport unit includes a mesh belt that transports the web, and the mesh belt has a mesh belt on a side opposite to the first roller, and the web includes the first belt. And a third roller disposed so as to be sandwiched between the rollers, and the third roller is a driven roller that rotates as the mesh belt moves.

Claims (12)

A material having a deposition surface on which a material containing fibers is deposited as a web, and a conveyance unit for conveying the web;
A first roller facing the deposition surface of the transport unit and contacting a web transported by the transport unit, the first roller having a rotation axis in a direction intersecting a web transport direction by the transport unit; Have
The radius of the said 1st roller is larger than the thickness of the web before contact | abutting to the said 1st roller, The sheet manufacturing apparatus characterized by the above-mentioned. A housing portion covering a sieve portion having a plurality of openings;
A material containing a fiber that has passed through the opening has a deposition surface on which the material is deposited as a web, and a transport unit that transports the web;
A first roller that contacts the web conveyed by the conveying unit;
A seal portion provided on a side wall of the housing portion and in contact with an outer peripheral surface of the first roller;
The first roller is
The distance between the outer peripheral surface of the first roller and the deposition surface is smaller than the smaller one of the spacing between the housing portion and the deposition surface and the spacing between the seal portion and the deposition surface,
The interval between the rotation shaft of the first roller and the deposition surface is arranged to be larger than the smaller one of the spacing between the housing portion and the deposition surface and the spacing between the seal portion and the deposition surface. A sheet manufacturing apparatus. A material having a deposition surface on which a material containing fibers is deposited as a web, and a conveyance unit for conveying the web;
A first roller facing the deposition surface of the transport unit and contacting a web transported by the transport unit, the first roller having a rotation axis in a direction intersecting a web transport direction by the transport unit; ,
A control unit that changes the position of the first roller relative to the deposition surface according to the thickness of the web on the deposition surface of the transport unit;
The control unit changes the position of the first roller so that the height of the rotation shaft with respect to the deposition surface is higher than the thickness of the web. In the sheet manufacturing apparatus according to any one of claims 1 to 3,
In accordance with the thickness of the web on the deposition surface of the transport unit, it has a control unit that changes the load of the first roller,
The control unit reduces the load of the first roller when the web is thicker than when the web is thin. In the sheet manufacturing apparatus according to claim 3 or 4,
A detector for detecting the thickness of the web on the deposition surface of the transport unit;
The said control part controls a said 1st roller based on the detection result by the said detector, The sheet manufacturing apparatus characterized by the above-mentioned. In the sheet manufacturing apparatus according to claim 3 or 4,
A reception unit that receives input of information on the thickness of the sheet to be manufactured;
The said control part controls the said 1st roller based on the information regarding the thickness of the said sheet | seat, The sheet manufacturing apparatus characterized by the above-mentioned. In the sheet manufacturing apparatus according to claim 3 or 4,
The said control part controls the said 1st roller based on the conveyance speed of the web by the said conveyance part, The sheet manufacturing apparatus characterized by the above-mentioned. In the sheet manufacturing apparatus according to any one of claims 3 or 4 or claim 7,
The material includes fibers obtained by defibrating the raw material supplied from the supply unit,
The said control part controls the said 1st roller based on the supply speed | rate of the raw material by the said supply part, The sheet manufacturing apparatus characterized by the above-mentioned. In the sheet manufacturing apparatus according to any one of claims 1 to 8,
A second roller that faces the deposition surface, is located downstream of the first roller in the transport direction and contacts the web;
The sheet manufacturing apparatus, wherein a distance between the second roller and the deposition surface is smaller than a distance between the first roller and the deposition surface. In the sheet manufacturing apparatus according to any one of claims 3 to 8,
A second roller that faces the deposition surface, is located downstream of the first roller in the transport direction and contacts the web;
The controller controls the second roller based on the position of the first roller so that a distance between the second roller and the deposition surface is smaller than a distance between the first roller and the deposition surface. The sheet manufacturing apparatus is characterized in that the position of the sheet with respect to the deposition surface is changed. In the sheet manufacturing apparatus according to claim 9 or 10,
The sheet manufacturing apparatus according to claim 1, wherein a radius of the second roller is smaller than a radius of the first roller. A material having a deposition surface on which a material containing fibers is deposited as a web, and a conveyance unit for conveying the web;
A first roller facing the deposition surface of the transport unit and contacting a web transported by the transport unit, the first roller having a rotation axis in a direction intersecting a web transport direction by the transport unit; ,
A reception unit that receives input of information on the thickness of the sheet to be manufactured;
A control unit that changes a position of the first roller with respect to the deposition surface based on information on the thickness of the sheet received by the receiving unit;
The controller is
When the thickness of the sheet is the first thickness, the first roller is positioned at a first height,
When the thickness of the sheet is a second thickness that is greater than the first thickness, the first roller is positioned at a second height that is higher than the first height. apparatus.

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