JP2016047977A - Sheet production device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively mix a defibrated product with an additive.SOLUTION: A sheet production device comprises a fibrillation part capable of fibrillating a product to be fibrillated including fiber, a cylindrical part having a plurality of holes on a surface thereof and making a defibrated product subjected to fibrillation treatment in the fibrillation part pass through the plurality of holes by rotating, a housing surrounding the plurality of holes, a supply part disposed at a lower position than the cylindrical part, for supplying an additive for binding the plurality of pieces of fiber to the inside of the housing, and a binding part for forming a sheet by binding the fiber and the additive together.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a sheet manufacturing apparatus.

  Conventionally, waste paper fibers obtained by dry defibration of waste paper and a binder (additive) made of synthetic resin are mixed in advance to form a mixed raw material. After this mixed raw material is temporarily formed, it is heated and pressurized to form. A method for producing a waste paper fiber molded product for obtaining a product is known (see, for example, Patent Document 1).

JP-A-7-3603

  However, in the manufacturing method of the above-mentioned waste paper fiber molded product, waste paper and a binder (additive) are allowed to flow into and mixed with a waste paper defibrator. For this reason, when the temperature inside the used paper defibrator rises due to the operation of the used paper defibrator, the binder starts to melt, the binder is not sufficiently dispersed between the fibers, and the binder partially gathers. It was.

  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] A sheet manufacturing apparatus according to this application example includes a defibrating unit capable of defibrating an object to be defibrated including fibers and a plurality of holes on the surface, and is defibrated at the defibrating unit. A cylindrical portion that allows the defibrated material to pass through the plurality of holes by rotating, a housing portion that surrounds the plurality of holes, and an addition that binds the plurality of fibers disposed below the cylindrical portion It is characterized by comprising a supply part for supplying an object into the housing part, and a binding part for binding the fibers and the additive to form a sheet.

  According to this configuration, since the additive is supplied to the defibrated material in a dispersed state by supplying the additive below the cylindrical portion, it is easy to mix the defibrated material and the additive. Can do.

  Application Example 2 In the sheet manufacturing apparatus according to the application example, the housing portion includes an inclined portion below the cylindrical portion, and the supply portion supplies the additive to the inclined portion. Features.

  According to this configuration, since the additive is supplied in the process in which the defibrated material is collected by the inclined portion, it can be easily mixed.

  Application Example 3 In the sheet manufacturing apparatus according to the application example, the supply unit supplies the additive from above the inclined unit.

  According to this configuration, the additive easily adheres to the dispersed defibrated material and is easily mixed.

  Application Example 4 In the sheet manufacturing apparatus according to the application example described above, the inclined portion has a protruding portion positioned outside the housing portion in the horizontal direction, and supplies the additive in the supply portion. Is arranged in the projecting portion.

  According to this configuration, since the supply port is disposed outside the range in which the defibrated material descends from the cylindrical portion, it is possible to suppress the fibers from adhering to the supply port.

  Application Example 5 In the sheet manufacturing apparatus according to the application example described above, the sheet manufacturing apparatus includes a blower unit that blows air to the inclined portion.

  According to this structure, it can suppress that an additive and a fiber adhere to an inclined part by blowing. Moreover, an additive can be spread | diffused by blowing and it can make it easy to mix with a fiber.

Schematic which shows the structure of a sheet manufacturing apparatus. Schematic which shows the structure of a selection part and a supply part. Schematic which shows the structure of a selection part. Schematic which shows the structure of a selection part and a supply part. The schematic diagram which shows operation | movement of a selection part and a supply part. Schematic which shows the structure around the selection part concerning the modification 1. FIG. Schematic which shows the structure of the conveyance part concerning the modification 2. FIG.

  Hereinafter, 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, the configuration of the sheet manufacturing apparatus will be described. The sheet manufacturing apparatus is based on a technology for forming a raw material (defibrated material) Pu such as a pure pulp sheet or used paper on a new sheet Pr, for example. The sheet manufacturing apparatus according to the present embodiment includes a defibrating unit capable of defibrating a material to be defibrated including fibers, a defibrated material having a plurality of holes on the surface and defibrated at the defibrating unit, A cylindrical portion that passes through a plurality of holes by rotating, a housing portion that surrounds the plurality of holes, and a supply portion that is disposed below the cylindrical portion and supplies an additive that binds a plurality of fibers to the inside of the housing And a binding part that binds the fiber and the additive to form a sheet. Hereinafter, the configuration of the sheet manufacturing apparatus will be specifically described.

  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 1 of the present embodiment includes a supply unit 10, a crushing unit 20, a defibrating unit 30, a classification unit 40, a sorting unit 50, a supply unit 60, and a deposit. Part 70, binding part 200, and the like. And the control part which controls these members is provided.

  The supply unit 10 supplies waste paper Pu or the like as a raw material to the crushing unit 20. The supply unit 10 includes, for example, a tray 11 that accumulates and stores a plurality of used paper Pu, and an automatic feeding mechanism 12 that can continuously input the used paper Pu in the tray 11 to the crushing unit 20. The used paper Pu supplied to the sheet manufacturing apparatus 1 is, for example, A4 size paper that is currently mainstream in offices.

  The crushing unit 20 cuts the supplied used paper Pu into pieces of several centimeters square. The crushing unit 20 includes a crushing blade 21 and constitutes an apparatus in which the cutting width of a normal shredder blade is widened. Thereby, the supplied used paper Pu can be easily cut into pieces of paper. Then, the divided coarsely crushed paper is supplied to the defibrating unit 30 via the pipe 201.

  The defibrating unit 30 is capable of defibrating objects to be defibrated including fibers. Specifically, the defibrating unit 30 includes a rotating blade (not shown) that rotates, and performs defibrating to loosen the crushed paper supplied from the crushing unit 20 into fibers. Here, in this application, what is defibrated by the defibrating unit 30 is called a defibrated material, and what has passed through the defibrating unit 30 is called a defibrated material. In addition, the defibrating unit 30 of the present embodiment performs defibrating in a dry manner in the air. As a result of the defibrating process of the defibrating unit 30, the printed ink, toner, and the material applied to the paper such as the anti-bleeding material become fibers of several tens of μm or less (hereinafter referred to as “ink particles”). And separate. Therefore, the defibrated material that comes out from the defibrating unit 30 is fibers and ink particles obtained by defibrating a piece of paper. The airflow is generated by the rotation of the rotary blade, and the fibers defibrated via the pipe 202 are carried on the airflow and conveyed to the classification unit 40 in the air. In addition, you may provide separately the airflow generator which produces | generates the airflow for conveying the fiber disentangled in the defibrating part 30 via the piping 202 to the classification part 40 as needed.

  The classifying unit 40 classifies the introduced material by airflow. In this embodiment, the defibrated material as the introduced material is classified into ink particles and fibers. For example, the classifying unit 40 can classify the conveyed fibers into ink particles and fibers (defibrated material) by applying a cyclone. Note that other types of airflow classifiers may be used instead of the cyclone. In this case, as an airflow classifier other than the cyclone, for example, an elbow jet or an eddy classifier is used. The airflow classifier generates a swirling airflow, which is separated and classified by the difference in centrifugal force received depending on the size and density of the defibrated material, and the classification point can be adjusted by adjusting the speed and centrifugal force of the airflow. . As a result, the ink particles are divided into relatively small and low density ink particles and fibers larger than the ink particles and high density.

  The classifying unit 40 of the present embodiment is a tangential input type cyclone, and includes an introduction port 40a through which an introduced material is introduced from the defibrating unit 30, a cylinder unit 41 in which the introduction port 40a is tangentially arranged, The conical part 42 that follows, the lower outlet 40b provided at the lower part of the conical part 42, and the upper exhaust port 40c for discharging fine powder provided at the upper center of the cylindrical part 41 are configured. The diameter of the conical portion 42 decreases toward the lower side in the vertical direction.

  In the classification process, the airflow on which the defibrated material introduced from the introduction port 40a of the classification unit 40 is changed into a circumferential motion by the cylindrical part 41 and the conical part 42, and is subjected to centrifugal force and classified. Then, the fibers larger than the ink particles and having a high density move to the lower outlet 40b, and the relatively small and low density ink particles are led to the upper exhaust port 40c as fine powder together with air. Then, ink particles are discharged from the upper exhaust port 40 c of the classification unit 40. Then, the discharged ink particles are collected in the receiving unit 80 via the pipe 206 connected to the upper exhaust port 40c of the classifying unit 40. On the other hand, a classified product containing fibers classified through the pipe 203 from the lower outlet 40b of the classifying unit 40 is conveyed toward the sorting unit 50 in the air. From the classification unit 40 to the sorting unit 50, it may be transported by an air current when it is classified, or may be transported from the classification unit 40 located above to the sorting unit 50 located below by gravity. Note that a suction part or the like for efficiently sucking the short fiber mixture from the upper exhaust port 40c may be disposed in the upper exhaust port 40c, the pipe 206, or the like of the classification unit 40. Classification is not exactly divided at a certain size or density. Further, it is not exactly divided into fibers and ink particles. Among the fibers, relatively short fibers are discharged from the upper exhaust port 40c together with the ink particles. A relatively large ink particle is discharged from the lower outlet 40b together with the fiber.

  The sorting unit 50 has a plurality of holes on the surface, and the defibrated material that has been defibrated by the defibrating unit 30 is rotated to pass through the plurality of holes, and the plurality of cylindrical units 300 And a housing part 400 surrounding the hole. The sorting unit 50 sorts the classified product (defibrated material) including the fibers classified by the classifying unit 40 from the cylindrical unit 300 having a plurality of holes. More specifically, the classified product including the fibers classified by the classification unit 40 is sorted into a passing material that passes through the holes and a residue that does not pass through the holes. The sorting unit 50 according to the present embodiment includes a mechanism for dispersing the classified material in the air by rotational movement. Then, the passing material that has passed through the holes by sorting by the sorting unit 50 is conveyed from the lower frame 350 to the deposition unit 70 via the pipe 204. On the other hand, the residue that has not passed through the holes due to the sorting by the sorting unit 50 is returned to the defibrating unit 30 again as the defibrated material via the pipe 205. Thereby, the residue is reused (reused) without being discarded. The detailed configuration of the sorting unit 50 will be described later.

  In addition, a supply unit 60 that supplies an additive for binding a plurality of fibers to the inside of the housing unit 400 is disposed below the cylindrical unit 300. Examples of the additive include at least a binder resin (thermoplastic resin or thermosetting resin). In addition to the binder resin, the additive may include, for example, a flame retardant, a whiteness improver, a sheet strength enhancer, a sizing agent, and the like. Note that the entire supply unit 60 does not have to be disposed below the cylindrical part 300, and the supply port 63 for supplying the additive toward the inside of the housing part 400 is positioned below the cylindrical part 300. That's fine. The detailed configuration of the supply unit 60 will be described later.

  The material containing the passing material and the additive that has passed through the holes by the sorting unit 50 is conveyed to the deposition unit 70 through the pipe 204 in the air. The sorting unit 50 may be transported from the sorting unit 50 to the deposition unit 70 by a blower (not shown) that generates an air flow, or may be transported by gravity from the sorting unit 50 located above to the deposition unit 70 located below.

  The depositing section 70 deposits using a material containing a passing material containing fibers introduced from the pipe 204 and a binder resin to form the web W. The depositing unit 70 has a mechanism for uniformly dispersing the fibers in the air and a mechanism for depositing the dispersed fibers on the mesh belt 73. In addition, the web W concerning this embodiment says the structure form of the object containing a fiber and binder resin. Therefore, even when the shape or the like changes during heating, pressurizing, cutting, or conveying the web, the web is shown.

  First, as a mechanism for uniformly dispersing the fibers in the air, a forming drum 71 into which the fibers and the binder resin are charged is disposed in the deposition unit 70. Then, by rotating the forming drum 71, the binder resin (additive) can be uniformly mixed in the passing material (fiber). The forming drum 71 is provided with a screen having a plurality of small holes. Then, the forming drum 71 is driven to rotate, and the binder resin (additive) is uniformly mixed in the passing material (fiber), and the mixture of the fiber and the fiber and the binder resin that have passed through the small holes is uniformly in the air. Can be dispersed.

  Below the forming drum 71, an endless mesh belt 73 in which a mesh stretched by a stretch roller 72 is formed is disposed. The mesh belt 73 is moved in one direction by rotating at least one of the stretching rollers 72.

  In addition, a suction device 75 as a suction unit that generates an airflow directed vertically downward is provided below the forming drum 71 via a mesh belt 73. The suction device 75 can suck the fibers dispersed in the air onto the mesh belt 73.

  The fibers and the like that have passed through the small hole screen of the forming drum 71 are deposited on the mesh belt 73 by the suction force of the suction device 75. At this time, by moving the mesh belt 73 in one direction, it is possible to form a web W that includes fibers and a binder resin and is deposited in a long shape. By continuously dispersing from the forming drum 71 and moving the mesh belt 73, a continuous belt-like web W is formed. The mesh belt 73 may be metallic, resinous, or non-woven fabric, and may be any material as long as fibers can be deposited and an air stream can pass therethrough. Note that if the mesh hole diameter of the mesh belt 73 is too large, fibers enter between the meshes, resulting in unevenness when the web W (sheet) is formed. On the other hand, if the mesh hole diameter is too small, the suction device 75. It is difficult to form a stable airflow. For this reason, it is preferable to adjust the hole diameter of a mesh suitably. The suction device 75 can be configured by forming a sealed box with a window of a desired size opened under the mesh belt 73, and sucking air from other than the window to make the inside of the box have a negative pressure from the outside air. In addition, the web W concerning this embodiment says the structure form of the object containing a fiber and binder resin. Accordingly, the web W is shown even when the form or the like is changed when the web W is heated, pressurized, cut or transported.

  The web W formed on the mesh belt 73 is transported by the transport unit 100. The conveyance unit 100 according to the present embodiment illustrates a conveyance process of the web W from when the mesh belt 73 is finally put into the stacker 160 as a sheet Pr (web W). Therefore, in addition to the mesh belt 73, various rollers and the like function as a part of the transport unit 100. As the transport unit, there may be at least one of a transport belt, a transport roller, and the like. Specifically, first, the web W formed on the mesh belt 73 which is a part of the transport unit 100 is transported according to the transport direction (arrow in the figure) by the rotational movement of the mesh belt 73. Next, the web W is conveyed from the mesh belt 73 according to the conveyance direction (arrow in the figure). In the present embodiment, the range in which the sheet Pr is formed from the web W deposited by the deposition unit 70 on the downstream side of the deposition unit 70 in the conveyance direction of the web W is that the sheet is formed by binding fibers and additives. It belongs to the binding part 200 to be formed.

  A pressure unit is disposed on the downstream side of the deposition unit 70 in the web W conveyance direction. In addition, the pressurization part of this embodiment is the pressurization part 140 which has the roller 141 which pressurizes the web W. FIG. By passing the web W between the roller 141 and the stretching roller 72, the web W can be pressurized. Thereby, the strength of the web W can be improved.

  On the downstream side of the pressure unit 140 in the conveyance direction of the web W, a roller 120 in front of the cutting unit is disposed. The front cutting unit roller 120 has a pair of rollers 121. One of the pair of rollers 121 is a drive control roller, and the other is a driven roller.

  Further, a one-way clutch is used for a drive transmission unit that rotates the front cutting unit roller 120. The one-way clutch has a clutch mechanism that transmits rotational force only in one direction, and is configured to idle in the opposite direction. As a result, when an excessive tension is applied to the web W due to the speed difference between the post-cutting section roller 125 and the pre-cutting section roller 120, the web W is idled on the pre-cutting section roller 120 side, so that the tension on the web W is suppressed. The web W can be prevented from being torn off.

  A cutting unit 110 that cuts the web W in a direction that intersects the transport direction of the web W to be transported is disposed on the downstream side of the front roller 120 in the transport direction of the web W. The cutting unit 110 includes a cutter, and cuts the continuous web W into sheets (sheets) according to a cutting position set to a predetermined length. For the cutting unit 110, for example, a rotary cutter can be applied. According to this, it becomes possible to cut while conveying the web W. Accordingly, since the conveyance of the web W is not stopped at the time of cutting, the manufacturing efficiency can be improved. The cutting unit 110 may apply various cutters in addition to the rotary cutter.

  A cutting portion rear roller 125 is disposed downstream of the cutting portion 110 in the web W conveyance direction. The cutting portion rear roller 125 has a pair of rollers 126. One of the pair of rollers 126 is a drive control roller, and the other is a driven roller.

  In the present embodiment, tension can be applied to the web W due to the speed difference between the roller 120 before the cutting portion and the roller 125 after the cutting portion. And it is comprised so that the cutting part 110 may be driven in the state with tension applied to the web W, and the web W may be cut | disconnected.

  A pair of heating and pressing rollers 151 constituting the heating and pressing unit 150 are arranged downstream of the cutting unit rear roller 125 in the conveyance direction of the web W. The heating and pressurizing unit 150 binds fibers included in the web W through a binder resin. A heating member such as a heater is provided at the center of the rotating shaft of the heating and pressing roller 151, and the web W being conveyed is heated by passing the web W between the pair of heating and pressing rollers 151. Can be pressurized. The web W is heated and pressurized by the pair of heating and pressing rollers 151, so that the binder resin is melted and easily entangled with the fibers, and the fiber interval is shortened and the contact point between the fibers is increased. Thereby, a density increases and the intensity | strength as the web W improves. In the heating and pressing unit 150, heating and pressing are performed so that the web W has a thickness of about 1/5 to 1/10 of the thickness of the web W before the heating and pressing process.

  A rear cutting unit 130 that cuts the web W along the conveyance direction of the web W is disposed downstream of the heating and pressurization unit 150 in the conveyance direction of the web W. The rear cutting unit 130 includes a cutter and cuts according to a predetermined cutting position in the conveyance direction of the web W. Thereby, a sheet Pr (web W) having a desired size is formed. Then, the cut sheet Pr (web W) is stacked on the stacker 160 or the like.

  In addition, the sheet | seat concerning the said embodiment mainly says what used the thing containing fibers, such as used paper and a pure pulp, as a raw material, and was made into the sheet form. However, the shape is not limited to that, and may be a board shape or a web shape (or a shape having irregularities). The raw material may be plant fibers such as cellulose, chemical fibers such as PET (polyethylene terephthalate) and polyester, and animal fibers such as wool and silk. In the present application, the sheet is divided into paper and non-woven fabric. The paper includes a thin sheet form, and includes recording paper for writing and printing, wallpaper, wrapping paper, colored paper, Kent paper, and the like. Nonwoven fabrics are thicker or lower in strength than paper and include nonwoven fabrics, fiber boards, tissue paper, kitchen paper, cleaners, filters, liquid absorbents, sound absorbers, cushioning materials, mats, and the like.

  In the present embodiment, the used paper mainly refers to printed paper. However, if used as a raw material, it is regarded as used paper regardless of whether it is used.

  Next, the configuration of the selection unit and the supply unit will be described. 2 and 4 are schematic diagrams showing the configuration of the sorting unit and the supply unit, and FIG. 3 is a schematic diagram showing the configuration of the sorting unit. 2 is a perspective view of the selection unit and the supply unit, FIG. 3A is a schematic diagram showing the configuration of the cylindrical unit, and FIG. 3B is a schematic diagram showing the configuration of a part of the housing unit. It is. FIG. 4 is a schematic side view of the selection unit and the supply unit. As shown in FIG. 2, the sorting unit 50 includes a cylindrical part 300, a housing part 400, and the like. In addition, the supply unit 60 is disposed in a part of the housing unit 400.

  As shown in FIG. 3A, the cylindrical portion 300 of the sorting portion 50 has a hole portion 310 having a plurality of holes 311 through which a material containing fibers passes in the air. The cylindrical portion 300 of the present embodiment has a drum shape. The cylindrical portion 300 can pass the material (classified product) from the hole 311 by rotating around the rotation center axis R. At both ends of the hole 310 in the direction of the rotation center axis R, a cylindrical part 315 having no hole 311 is provided. The hole 310 and the cylindrical portion 315 are fastened by welding, screws, or the like, and rotate integrally. The cylindrical portion 300 is formed in a cylindrical shape using a metal plate such as stainless steel having a uniform thickness, and open ports 306 are provided at both ends thereof.

  The hole 310 is provided with a plurality of holes 311 (punching metal). The material containing the fiber dispersed from the hole 311 is configured to pass through, and the size, formation region, and the like of the hole 311 are appropriately set depending on the size and type of the material containing the fiber. The hole 310 is not limited to punching metal, and may be a wire mesh material. The plurality of holes 311 have the same size (area) and are arranged at equal intervals. Thereby, the dimension of the material which passed the hole 311 becomes substantially uniform. Moreover, the entangled fiber is loosened when passing through the hole 311. The cylindrical portion 315 is a portion that does not have the hole 311 and the like, and is a portion that contacts the housing portion 400.

  The housing part 400 surrounds the plurality of holes 311 of the cylindrical part 300. As shown in FIG. 2, the housing part 400 includes an upper frame body 340 disposed above, a lower frame body 350 disposed below, and a connection disposed between the upper frame body 340 and the lower frame body 350. And a plate portion 390. A part of the cylindrical portion 300 is surrounded so that the hole 310 of the cylindrical portion 300 comes to the inside of the upper frame 340. Therefore, the hole 310 of the cylindrical portion 300 is disposed in the space inside the housing portion 400. A part of the upper frame 340 of the housing part 400 is in contact with the cylindrical part 315. In this way, the upper frame 340 of the housing part 400 and both of the cylindrical parts 315 are in contact with each other, thereby suppressing the diffusion of the material including the fiber that has passed through the hole 311 from the inside to the outside of the housing part 400. Can do. Further, since the housing part 400 is arranged inside the cylindrical part 300 in the rotational axis direction R of the cylindrical part 300, the width dimension of the housing part 400 is larger than the width dimension of the cylindrical part 300 in the rotational axis direction R of the cylindrical part 300. Therefore, it is possible to obtain a configuration in which the length is shorter, and the device configuration can be reduced in size. Note that a pile seal or the like is provided at a portion where the upper frame 340 of the housing portion 400 and both the cylindrical portions 315 are in contact with each other. Thereby, the frictional force between the upper frame 340 and the cylindrical portions 315 and 315 when the cylindrical portion 300 rotates with respect to the upper frame 340 is reduced, and the rotational load on the cylindrical portion 300 can be reduced. Moreover, diffusion of fibers and the like from the inside of the upper frame 340 of the housing part 400 to the outside can be suppressed. An open opening 401 is formed on the lower side of the upper frame body 340, and the passing material that has passed through the hole 311 of the cylindrical portion 300 can move to the lower frame body 350 side through the open opening 401. It has become.

  Further, as shown in FIG. 2, two end portions 500 (500a, 500b) that do not rotate are provided at both ends of the cylindrical portion 300 in the extending direction of the rotation center axis R. The sorting unit 50 is provided on one side 500a and is provided on the inlet 560 for introducing the material into the cylindrical part 300 and on the other side 500b, and is positioned on the lower side in the vertical direction than the inlet 560. And a discharge port 570 that discharges a residue that is a material that has not passed through the hole 311. The cylindrical portion 300 is rotatably supported by a support portion (not shown). The cylindrical part 300 and the side part 500 are configured to contact the cylindrical part 315 of the cylindrical part 300. Note that a pile seal or the like is provided at a portion where the side portion 500 and both the cylindrical portions 315 are in contact with each other. Thereby, the frictional force between the side part 500 and the cylindrical part 315 when the cylindrical part 300 rotates with respect to the side part 500 is reduced, and the rotational load on the cylindrical part 300 can be reduced. Further, it is possible to suppress diffusion of fibers and the like from the inside of the cylindrical portion 300 to the outside through the side portion 500. The side portions 500a and 500b are fixed to an external frame (not shown). The introduction port 560 is connected to the pipe 203 and the discharge port 570 is connected to the pipe 205.

  The upper frame body 340 and the lower frame body 350 of the housing part 400 are connected via a connection plate part 390. The connection plate 390 is provided with an opening 391 that is the same size as the opening 401 provided in the upper frame 340 or larger than the opening 401, and the opening 401 and the connection plate 390 provided in the upper frame 340. The upper frame 340 is connected to one surface of the connection plate 390 so as to correspond to the opening 391. In addition, a lower frame body 350 is connected to the other surface of the connection plate portion 390. The lower frame body 350 has an open port 352 whose upper end side is open, is located below the cylindrical portion 300, and is formed so that the cross-sectional area of the internal space in the horizontal direction becomes smaller toward the lower side. . In other words, the lower frame body 350 has an inclined portion 350a in which the inner wall surface of the lower frame body 350 is inclined from the upper side to the lower side. Therefore, the passing material sent to the lower frame body 350 side is directed from the upper side to the lower side of the lower frame body 350 along the inner wall surface having the inclined portion 350a in the process of passing through the lower frame body 350 from the opening 352. It is conveyed while being collected. The opening 352 of the lower frame 350 is larger than the opening 401 of the upper frame 340 and the opening 391 of the connection plate 390. A discharge port 355 having an opening for discharging the passing material is provided at the lowermost part of the lower frame body 350, and the discharge port 355 is connected to the pipe 204.

  As shown in FIG. 3 (b), the lower frame 350 forms a substantially quadrangular pyramid. More specifically, an inner wall surface of the inclined portion 350a of the lower frame body 350 has an inner surface portion 351a having four flat surfaces. And between the inner surface parts 351a, the curved surface part 351b which has a curved surface convex toward the outer side of the lower frame 350 is provided. By having the curved surface portion 351b between the inner surface portions 351a, when the fiber or the like is conveyed into the lower frame body 350, the fiber or the like can be smoothly conveyed. Further, the lower frame body 350 has a substantially quadrangular pyramid corresponding to the square shape of the housing portion 400, and can be reduced in size as compared with the conical conveyance portion.

Moreover, it is preferable that the lower frame body 350 in which the fiber etc. are conveyed is shape | molded with the material which has electroconductivity. For example, it can be molded from a binder resin to which a metal, a conductive filler or the like is added. Further, an electrostatic film may be attached to the inner surface portion 351a or the curved surface portion 351b, or surface treatment for imparting conductivity to the surface of the inner surface portion 351a or the curved surface portion 351b may be performed. Note that the surface resistance values of the inner surface portion 351a and the curved surface portion 351b are preferably 10 ⁸ (Ω / □) or less. Thereby, the adhesion to the inner surface part 351a and the curved surface part 351b due to charging of the conveyed fiber is reduced, and the fiber or the like can be conveyed more efficiently.

  Further, as shown in FIG. 2, a supply unit 60 that supplies an additive to the inclined portion 350 a of the lower frame body 350 is disposed. In the present embodiment, the additive can be supplied from above the inclined portion 350a. The supply unit 60 includes a storage unit 61 that stores the additive, a supply port 63 that supplies the additive to the inclined portion 350a, and a transport unit 62 that is disposed between the storage unit 61 and the supply port 63. ing. The transport unit 62 includes, for example, a screw feeder having a helical screw, and transports the additive stored in the storage unit 61 by rotating the screw, and the additive is directed from the supply port 63 toward the inclined unit 350a. Can be supplied. Accordingly, the passing material and the additive are mixed and conveyed to the discharge port 355 side of the lower end portion of the lower frame 350.

  The supply port 63 of the supply unit 60 is located above the central portion of the lower frame body 350 in the vertical direction. In the present embodiment, the lower frame body 350 is disposed on the surface of the connection plate portion 390 corresponding to the uppermost side in the vertical direction. Therefore, the connection plate portion 390 may also be regarded as a part of the lower frame 350. Further, in the horizontal direction, the lower frame 350 has a protruding portion 395 located outside the upper frame 340 of the housing portion 400, and the supply port 63 for supplying the additive in the supply portion 60 is disposed in the protruding portion 395. Is done. Accordingly, since the supply port 63 is disposed outside the inner wall surface of the upper frame 340 of the housing part 400, the passing material falling from the cylindrical part 300 does not collect in the supply port 63. Further, the supply port 63 does not protrude into the lower frame body 350. This also prevents the passing material falling from the cylindrical part 300 from accumulating in the supply port 63.

  Specifically, as shown in FIG. 4, the size of the cross-sectional area of the inner space at the upper end in the vertical direction of the lower frame body 350 (the opening 391 of the connection plate 390) is the vertical of the upper frame body 340. It is larger than the size of the cross-sectional area of the internal space at the lower end in the direction (the size of the opening 401). Specifically, as shown in the side sectional view of FIG. 4, the width L2 of the innermost space at the uppermost end of the lower frame 350 is wider than the width L1 of the innermost space at the lowermost end of the upper frame 340. wide. Also in the direction perpendicular to the paper surface of FIG. 4, the width of the internal space at the uppermost end of the lower frame 350 is wider than the width of the internal space at the lowermost end of the upper frame 340. Since the lower frame body 350 is wider and larger than the upper frame body 340, the passing material can be conveyed downward without being caught by the lower frame body 350. On the contrary, when the width of the lower frame body 350 is smaller than that of the upper frame body 340, a step is formed on the inner side of the upper frame body 340, and passing objects accumulate at the step. In addition, even if the supply port 63 protrudes into the lower frame body 350, the tip end portion only needs to be disposed outside the inner wall surface of the upper frame body 340.

  Furthermore, in this embodiment, as shown in FIG. 2, the ventilation part 360 which ventilates the inclination part 350a is provided. The air blowing from the air blowing unit 360 generates an air current that swirls inside the lower frame body 350. As the air blowing means of the air blowing unit 360, a fan is mounted and the fan is rotated by a rotating means such as a motor to generate air blowing, or compressed air is generated using a pump. May be. One air blower 360 may be provided, or a plurality of air blowers 360 may be provided. The air blowing port 361 of the air blowing unit 360 is located above the central portion of the lower frame body 350 in the vertical direction. In the present embodiment, the lower frame body 350 is disposed on the surface of the connection plate portion 390 corresponding to the uppermost side in the vertical direction. Therefore, the connection plate portion 390 may also be regarded as a part of the lower frame 350. The blower 360 is disposed on the surface of the connection plate 390 corresponding to one corner of the opening 391 of the lower frame 350. And the ventilation port 361 of the ventilation part 360 is arrange | positioned so that ventilation is possible along the inner surface part 351a provided in the same side with respect to the inside of the lower frame 350. FIG. As described above, by providing the blower 360, it is possible to blow air over a wide range inside the lower frame 350. In the present embodiment, the airflow that swirls flows inside the lower frame 350 by the blower 360. Specifically, as shown in FIG. 5, the air discharged from the air blowing port 361 of the air blowing unit 360 rotates around the inner surface part 351a and the curved surface part 351b of the lower frame body 350 as if spiraling, It flows to the lower side of the lower frame body 350 and finally flows to the discharge port 355 at the lower end of the lower frame body 350. It rides on the airflow swirling inside the lower frame body 350, and follows the inclined inner surface part 351a and curved surface part 351b, and the material including fibers (passage material) and additives is directed from the upper side to the lower side of the lower frame body 350. Can be transported smoothly. In order to flow the swirling airflow, when the trajectory where the ball falls due to gravity along the inclination of the inner surface portion 351a or the curved surface portion 351b is defined as an inclined line, the airflow may flow so as to cross the inclined line. On the contrary, when the airflow is made to flow along the inclined line, a large range of airflow is required, so a large number of air blowing sections are required. Even if it does in this way, although a fiber etc. can be conveyed, the number of ventilation parts can be reduced by making it the air current which turns.

  Further, as shown in FIG. 4, the air discharged from the air blowing port 361 of the air blowing unit 360 has a smaller cross-sectional area of the internal space in the horizontal direction from the upper end to the lower end of the lower frame 350. The air discharged from the air blowing port 361 of the air blowing unit 360 generates a large swirling air flow at the upper end of the lower frame 350, and is gradually discharged from the upper end of the lower frame 350 to the lower end. It flows to the exit 355.

  Further, in the horizontal direction, the lower frame body 350 is provided with the air blowing port 361 of the air blowing unit 360 at the protruding portion 395 located outside the housing portion 400. In the present embodiment, a protruding portion 395 is provided at the end of the connection plate portion 390, and the air blowing port 361 of the air blowing portion 360 is provided in the protruding portion 395. Accordingly, since the air blowing port 361 is arranged outside the inner wall surface of the housing part 400, the passing material that falls from the cylindrical part 300 does not collect in the air blowing port 361. Further, the air blowing port 361 does not protrude into the lower frame body 350. This also prevents the passing material falling from the cylindrical portion 300 from accumulating in the air blowing port 361. Note that even if the air blowing port 361 protrudes into the lower frame body 350, the tip end portion only needs to be disposed outside the inner wall surface of the upper frame body 340.

  Next, operations of the selection unit and the supply unit will be described. FIG. 5 is a schematic diagram illustrating the operation of the sorting unit and the supply unit. FIG. 5A is a schematic diagram when the sorting unit and the supply unit are viewed from the side, and FIG. It is a schematic diagram when the part is viewed in plan.

  First, a classified product including fibers conveyed from the classification unit 40 through the pipe 203 is introduced into the cylindrical unit 300 from the introduction port 560 of the sorting unit 50. Then, by the rotation of the cylindrical portion 300 around the rotation center axis R, the classified product introduced into the cylindrical portion 300 is sorted into a passing material that passes through the hole 311 of the cylindrical portion 300 and a residue that does not pass through the hole 311. . The residue that does not pass through the hole 311 is conveyed to the defibrating unit 30 via the pipe 205 (see FIGS. 1 and 2).

  The passing material that has passed through the hole 311 of the cylindrical portion 300 descends toward the opening 401 at the lower end of the upper frame 340 (the opening 391 of the lower frame 350). On the other hand, as shown in FIGS. 5A and 5B, the additive is supplied from the supply port 63 of the supply unit 60 of the lower frame 350 toward the inclined portion 350 a. Further, wind is sent from the air blowing port 361 of the air blowing unit 360 of the lower frame body 350 to the inside of the lower frame body 350. Specifically, the wind is sent in a direction intersecting the inclined surface and directed horizontally or downward. The wind discharged from the blower port 361 turns (turns) around the inner surface part 351a and the curved surface part 351b inside the lower frame body 350 and turns (turns) to the lower discharge port 355 of the lower frame body 350. It will flow. As a result, the passing material that has passed through the hole 311 of the cylindrical portion 300 and the additive supplied from the supply portion 60 flow to the discharge port 355 while turning inside the lower frame body 350 in accordance with the airflow generated by the blower portion 360. Is done. Then, the material including the passing material and the additive discharged from the discharge port 355 is conveyed to the deposition unit 70 side through the pipe 204. Thereafter, the sheet Pr is manufactured through the binding part 200.

  As described above, according to this embodiment, at least one of the following effects can be obtained.

  For the defibrated material (passed material) that has passed through the hole 311 of the cylindrical part 300, the additive is supplied from the supply part 60 toward the inclined part 350a below the cylindrical part 300. The additive binds the fibers to each other, but if the additive is not dispersed and arranged between the fibers, the strength of the sheet is insufficient. However, when the additive is simply supplied, there is a case where the additive is not dispersed and arranged between the fibers. However, according to the configuration of the present application, the defibrated material is dispersed by passing through the holes 311 of the rotating cylindrical portion 300. Then, by supplying the additive below the cylindrical portion 300, the defibrated material and the additive can be easily mixed with the dispersed defibrated material. In addition, by supplying the additive to the inclined portion, the additive is likely to diffuse along the inclination, or even if the additive does not move along the inclination, the additive easily adheres to the defibrated material that moves along the inclination. Become. Further, by supplying the additive from above the inclined portion, it is easy to diffuse using gravity in addition to the inclination. Furthermore, the air blower 360 generates an air flow that swirls the inner surface 351a and the curved surface 351b of the lower frame 350, thereby preventing the additive and defibrated material from adhering to the inclined portion 350a. Can be diffused to facilitate mixing with the defibrated material.

  The present invention is not limited to the above-described embodiment, and various modifications and improvements can be added to the above-described embodiment. A modification will be described below.

  (Modification 1) In the above embodiment, the outlet 355 of the lower frame 350 and the pipe 204 are connected, but the present invention is not limited to this configuration. For example, a blower may be further provided between the discharge port 355 and the pipe 204. This blower is for sending the collected passing material downstream. In addition, even if it provides a blower without providing the shape of the lower frame body 350 of this application, or the ventilation part 360, conveyance of a passing material cannot be performed efficiently. Even if the air is sucked downward by the blower, it is not possible to generate a swirling air flow in the transport unit. In addition, the airflow passing through the internal space is larger than the airflow along the inner wall surface, and adhesion of passing materials on the inner wall surface cannot be reduced. FIG. 6 is a schematic diagram illustrating a configuration around the sorting unit according to the first modification. As shown in FIG. 6, a blower 600 that generates an air flow from the discharge port 355 to the pipe 204 side is provided between the discharge port 355 of the lower frame 350 of the sorting unit 50 and the pipe 204. The passing material collected (conveyed) at the discharge port 355 side of the lower frame 350 by the generation of the air flow by the blower 600 can be efficiently conveyed to the pipe 204 side without being retained in the vicinity of the discharge port 355. it can. In this case, the air volume by the blower 360 is set in a range that does not exceed the air volume of the blower 600. For example, the air volume by the blower 360 is set to about 1/10 of the air volume of the blower 600. In this way, it is possible to reduce the retention of the passing material at the discharge port 355 and to suppress the generation of fiber lumps and the like. Furthermore, in addition to the blowing means of the blowing unit 360, a mixing means for mixing the defibrated material and the additive may be provided. In this case, a blower unit including a fan blade or the like can be applied. If it does in this way, a defibrated material, an additive, etc. can be mixed more efficiently.

  (Modification 2) In the above embodiment, the shape of the lower frame 350 is a substantially quadrangular pyramid, but is not limited to this shape. FIG. 7 is a schematic diagram illustrating a configuration of a transport unit according to the second modification. For example, as shown to Fig.7 (a), the lower frame 650 which has a substantially cone shape may be sufficient. Moreover, as shown in FIG.7 (b), the lower frame body 651 which made arcuate the 2 sides of 1 set of opposing sides of a general | schematic square pyramid may be sufficient. Moreover, as shown in FIG.7 (c), it may be the lower frame 652 (rounded hopper) which has a substantially rounded shape and the inclination angle is not constant. Even if it does in this way, the effect similar to the said effect can be acquired.

  (Modification 3) In the sheet manufacturing apparatus 1 of the above embodiment, the single supply unit 60 is provided, but the present invention is not limited to this configuration. For example, a plurality of supply units 60 may be arranged. In this way, the additive can be supplied in a wider range. In addition, when the remaining amount of the additive in one supply unit 60 decreases, the supply of the additive from the other supply unit 60 can be switched, and continuous operation is possible. Moreover, the structure provided with the supply part 60 which each supplies a flame retardant and a white agent other than binder resin as an additive may be sufficient. If it does in this way, a flame retardant, a white agent, etc. can be mixed with a defibrated material (passing material) besides a binder resin.

  (Modification 4) Although the normal air was discharged in the ventilation part 360 of the said embodiment, it is not limited to this. For example, ionized air may be blown. If it does in this way, the ionized air will be sprayed on a fiber, and the charged fiber will be neutralized. Thereby, the adhesion of the fibers to the inner surface part 351a and the curved surface part 351b of the lower frame 350 is reduced, and the conveyance efficiency can be increased.

  (Modification 5) In the sheet manufacturing apparatus 1 of the above embodiment, the single air blowing unit 360 is provided, but the configuration is not limited thereto. For example, you may arrange | position the several ventilation part 360. FIG. According to this configuration, the blast volume is increased, and the defibrated material and the additive can be mixed efficiently. In addition, even if there is no ventilation part 360, if mixing is possible by supply of the additive from the supply part 60, the ventilation part 360 may be omitted.

  (Modification 6) In the inclined portion 350a of the above embodiment, the wall surface is always inclined downward from the opening 352 of the lower frame 350 to the outlet 355. However, the present invention is not limited to this, and a vertical portion or a horizontal portion may be provided on a part of the inner wall surface.

  (Modification 7) In the above embodiment, the housing part 400 covers a part of the cylindrical part 300, but may cover the entire cylindrical part 300.

  (Modification 8) In the housing part 400 of the above embodiment, the upper frame body 340 and the lower frame body 350 are connected via the connection plate part 390. However, the present invention is not limited to this, and the upper frame body 340 and the lower frame body 350 may be directly connected without using the connection plate portion 390. For example, the upper frame 340 and the connection plate 390 may be integrated.

  DESCRIPTION OF SYMBOLS 1 ... Sheet manufacturing apparatus, 10 ... Supply part, 20 ... Crushing part, 21 ... Crushing blade, 30 ... Defibration part, 40 ... Classification part, 50 ... Sorting part, 60 ... Supply part, 61 ... Reservation part, 62 DESCRIPTION OF SYMBOLS Conveying part, 63 ... Supply port, 70 ... Depositing part, 80 ... Receiving part, 100 ... Conveying part, 200 ... Binding part, 300 ... Cylindrical part, 310 ... Hole part, 311 ... Hole, 340 ... Upper frame, 350 ... Lower frame, 350a ... Inclined part, 360 ... Air blowing part, 361 ... Air blowing port, 390 ... Connection plate part, 395 ... Projection part, 400 ... Housing part.

Claims (5)

A defibrating unit capable of defibrating objects to be defibrated including fibers;
A cylindrical part that has a plurality of holes on the surface and passes the defibrated material that has been defibrated by the defibrating part through the plurality of holes by rotation;
A housing portion surrounding the plurality of holes;
A supply unit that is disposed below the cylindrical part and supplies an additive that binds the plurality of fibers into the housing part;
A sheet manufacturing apparatus comprising: a binding unit that binds the fibers and the additive to form a sheet. In the sheet manufacturing apparatus according to claim 1,
The housing part has an inclined part below the cylindrical part,
The sheet manufacturing apparatus, wherein the supply section supplies the additive to the inclined section. In the sheet manufacturing apparatus according to claim 1 or 2,
The sheet manufacturing apparatus, wherein the supply unit supplies the additive from above the inclined unit. In the sheet manufacturing apparatus according to claim 2 or 3,
The inclined part has a protruding part located outside the housing part in the horizontal direction, and a supply port for supplying the additive in the supplying part is disposed in the protruding part. manufacturing device. In the sheet manufacturing apparatus according to claim 4,
A sheet manufacturing apparatus comprising a blower for blowing air to the inclined part.

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