Sheet production apparatus

Abstract

To provide a sheet production apparatus having good operability and assembled with a lid part of a storage part having excellent sealing property and designability.SOLUTION: A sheet production apparatus has a storage part for storage of a paper piece and a processing part for producing a recycled paper by a dry process using the paper piece as a raw material, wherein the storage part is assembled with an openable lid part, the lid part includes an exterior cover and a sealing cover covering an input port of the storage part, and the exterior cover and the sealing cover are operatively connected with each other in open / close motions via an energization part.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a sheet manufacturing apparatus. [Background technology]

[0002] In sheet manufacturing equipment that produces sheets from scraps of paper such as waste paper using a dry process, paper pieces cut to a specified size by a shredder are stored in a storage area. When the paper pieces are fed in or stirred in the storage area, the storage area is humidified to prevent paper dust from flying around from the paper pieces or adhering to the inner walls due to static electricity. Recently, dry sheet manufacturing equipment has been installed in many places such as corporate offices, alongside office equipment such as copy machines.

[0003] For example, Patent Document 1 discloses a paper material supplying device that supplies paper material to a used paper recycling device. According to this document, paper material made up of paper pieces is stored in a hopper having a discharge outlet at the bottom, and a delivery means including a pair of delivery rollers is provided at the discharge outlet, and the delivery means can prevent the paper material from flowing back. The hopper corresponds to the storage section. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-149106 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the hopper of the waste paper recycling device in Patent Document 1 does not have a lid, which causes problems such as paper dust scattering outside the storage area. Furthermore, no consideration was given to maintaining humidity within the storage area. If a lid is provided for the storage area, it must be easy to open and close, have good sealing properties for the input port, and have a design that does not look out of place when installed in an office, etc. In other words, there has been a demand for a sheet manufacturing apparatus that is easy to operate and has a lid for a storage section that is excellent in sealing properties and design. [Means for solving the problem]

[0006] A sheet manufacturing apparatus according to one aspect of the present application has a storage section for storing paper scraps and a processing section for dry-processing recycled paper using the paper scraps as raw material, wherein the storage section is provided with an openable / closable lid section, and the lid section includes an outer cover and a sealing cover that covers an inlet of the storage section, and the outer cover and the sealing cover open and close in conjunction with each other via a biasing section. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 2 is a perspective view showing a schematic configuration of a storage section according to the first embodiment. [Figure 2] FIG. 4 is a perspective view of the storage unit with the lid open. [Figure 3] FIG. [Figure 4] FIG. 4 is a cross-sectional view of the lid portion taken along the bb cross section of FIG. 3. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. 10 is an enlarged perspective view of the periphery of the second engagement portion with the third member removed. [Figure 9] FIG. [Figure 10] FIG. 1 is a schematic diagram illustrating the configuration of a sheet manufacturing apparatus. DETAILED DESCRIPTION OF THE INVENTION

[0008] Embodiment 1 ***Storage section overview*** Fig. 1 is a perspective view showing a schematic configuration of a storage unit according to embodiment 1. Fig. 2 is a perspective view of the storage unit with the lid open. The storage unit 100 of this embodiment is a storage unit that stores paper scraps that serve as material in a sheet manufacturing apparatus 200 (FIG. 10) that dry-type produces sheets from paper scraps such as waste paper. The sheet manufacturing apparatus 200 will be described later.

[0009] The schematic configuration of the storage unit 100 according to this embodiment will be described with reference to the drawings. Each figure illustrates three mutually perpendicular axes: the X-axis, the Y-axis, and the Z-axis. In this embodiment, the height direction of the storage unit 100 is the Z-positive direction. The direction along the X-axis is referred to as the "X-direction," the direction along the Y-axis is referred to as the "Y-direction," and the direction along the Z-axis is referred to as the "Z-direction." For example, the Z-direction refers to both the Z-positive direction and the Z-negative direction. In this embodiment, the Z-direction coincides with the vertical direction. The Z-positive side is also referred to as "up," and the Z-negative side is also referred to as "down." In addition, in the following figures, dimensions and scales that differ from the actual dimensions may be used to make the explanation easier to understand.

[0010] As shown in Fig. 1, storage unit 100 has a rectangular parallelepiped shape and is provided with lid unit 50 along one side of its top surface 100a. When viewed from the X-minus side, lid unit 50 has a rectangular shape with its long side extending in the Y-direction, and has a handle 11 provided at its center. When viewed from the Y-minus side, lid unit 50 has a right-angled triangular shape, with a rotation axis 6 provided at one acute angle. When the lid portion 50 is closed, the surface that is flush with the top surface 100a of the storage portion 100 is referred to as the lid upper surface 10a, and the surface that is flush with the front surface 100b of the storage portion 100 is referred to as the lid front surface 10b.

[0011] As shown in Fig. 2, lid portion 50 is provided so as to be able to open and close around rotation axis 6. The user can open and close lid portion 50 by holding handle 11 and moving it up and down. In other words, storage portion 100 is provided with an openable and closable lid portion 50. When the lid 50 is open, a top plate 30 is provided on the top of the storage unit 100. The top plate 30 is a plate-like member made of a magnetic material, and in a preferred example, a steel plate is used. However, the top plate 30 is not limited to a steel plate, and any plate-like member made of a magnetic material will do. The top plate 30 is inclined with respect to the upper surface 100a of the storage unit 100, and a rectangular inlet 31 is provided in the top plate 30. The long side of the inlet 31 is aligned along the Y direction. The inside of the insertion port 31 is a storage chamber 32 for paper slips. The insertion port 31 is an opening for inserting paper slips into the storage chamber 32. In other words, the top plate portion 30 having the insertion port 31 is made of a magnetic material. The inside of the storage chamber 32 is humidified, as will be described in detail later.

[0012] The lid portion 50 is composed of an exterior cover 10, a sealing cover 20, and the like. As shown in Fig. 1, the exterior cover 10 has a design that is continuous with the outer shape of the storage section 100. The sealing cover 20 shown in Fig. 2 is an inner lid, and is provided along the base 10c of the right-angled triangular exterior cover 10. The sealing cover 20 has a rectangular shape that is slightly larger than the insertion port 31. When the lid part 50 is closed, the sealing cover 20 covers the insertion port 31, and its peripheral edge is in close contact with the top plate part 30. In other words, the lid part 50 includes the exterior cover 10 and the sealing cover 20 that covers the insertion port 31 of the storage part 100.

[0013] ***Lid configuration*** Fig. 3 is a perspective view of the lid seen from the sealing cover side, Fig. 4 is a cross-sectional view of the lid taken along the line bb in Fig. 3, and Fig. 5 is a perspective cross-sectional view of a main part of the lid. As shown in FIG. 3, the sealing cover 20 is composed of a flat plate portion 21 that covers the insertion port 31, a contact portion 23 provided around the flat plate portion 21 in a frame shape, a packing portion 22, and the like. In a preferred example, the flat plate portion 21 is a plate-like member made of resin. However, it is not limited to being made of resin, and any plate-like member that is lightweight and moisture-resistant may be used. The abutting portion 23 is provided in a square ring shape surrounding the flat plate portion 21 and abuts against the periphery of the insertion port 31. In other words, the sealing cover 20 includes the flat plate portion 21 that covers the insertion port 31, and the abutting portion 23 that is provided surrounding the flat plate portion 21 and abuts against the periphery of the insertion port 31. The abutting portion 23 and the packing portion 22 will be described in detail later.

[0014] Fig. 4 is a cross-sectional view of the lid portion 50 taken along the line bb in Fig. 3, and shows the structure for attaching the sealing cover 20 to the exterior cover 10. The cross section taken along the line cc in Fig. 3 is the same as the cross section taken along the line bb. As shown in Figure 4, a pair of triangular frames 40 are provided inside the exterior cover 10. The triangular frames 40 are shaped like a right triangle, one size smaller than the right-angled triangle of the exterior cover 10, and are composed of a frame 40a along the top surface 10a of the lid, a frame 40b along the front surface 10b of the lid, and a support frame 40c along the bottom edge 10c. The triangular frames 40 are fixed inside the exterior cover 10.

[0015] Two biasing members 3 are attached to the support frame 40c. In a preferred example, the biasing members 3 are coil springs. However, the biasing members 3 are not limited to coil springs and may be any elastic member, such as rubber or elastomer. As shown in Fig. 5, two triangular frames 40 are provided in the Y direction, and each has two urging portions 3. More specifically, as shown in Fig. 3, the urging portions 3 are arranged at positions corresponding to the four corners of the flat plate portion 21 of the sealing cover 20. Furthermore, the pair of triangular frames 40 are connected in the Y direction and are integrated.

[0016] As shown in FIG. 4, the support frame 40c and the flat plate portion 21 are connected by a first engagement portion 61 and a second engagement portion 62 via the biasing portion 3. The first engagement portion 61 is an L-shaped engagement fitting that engages with the support frame 40c so that the sealing cover 20 does not come off when pressed by the biasing portion 3. The second engagement portion 62 is an engagement portion that engages with the end portion of the sealing cover 20 on the opposite side to the first engagement portion 61, and an engagement shaft 66 is provided so as to be movable within an elongated hole 67.

[0017] FIG. 6 is an enlarged perspective view of the periphery of the first engagement portion. 6, one end of the first engagement portion 61 is fixed to the flat plate portion 21 with a screw, and the other end is provided with a return portion 61b. The return portion 61b is inserted into the through-hole 41 of the support frame 40c, and prevents the sealing cover 20 from falling off.

[0018] Fig. 7 is an enlarged perspective view of the periphery of the second engagement portion, and Fig. 8 is an enlarged perspective view of the periphery of the second engagement portion with the third member removed. As shown in FIG. 7, the second engagement portion 62 is made up of a first member 63, a second member 64, a third member 65, and the like. The first member 63 is an L-shaped engaging metal fitting, one end of which is fixed with a screw to the inner surface of the exterior cover 10. An engaging shaft 66 is attached to the other end of the first member 63.

[0019] 8, the second member 64 is an L-shaped engaging fitting that pairs with the first member 63, and one end thereof is fixed by a screw to the flat plate portion 21. The other end of the second member 64 is provided with a U-shaped groove into which the engaging shaft 66 is fitted. The third member 65 is a plate-like member having an elongated hole 67, and is placed on the second member 64 in the state shown in Fig. 8 and fixed with screws. This forms the second engagement portion 62 shown in Fig. 7. When attaching the sealing cover 20 to the exterior cover 10, first the return portion 61b of the first engagement portion 61 is inserted into the through-hole 41 of the support frame 40c, and then the second engagement portion 62 is assembled. As a result, when the lid portion 50 is opened, the exterior cover 10 and the sealing cover 20 move together, and when the lid portion 50 is closed, the sealing cover 20 can be brought into contact with the top plate portion 30 of the storage portion 100 with an appropriate pressure from the biasing portion 3. In particular, even if there is variation in the degree of contact of the sealing cover 20, the cushioning action of the biasing portions 3 arranged at the four corners of the flat plate portion 21 makes the degree of contact uniform. In other words, the exterior cover 10 and the sealing cover 20 open and close in conjunction with each other via the biasing portion 3. The biasing portion 3 is an elastic member provided between the exterior cover 10 and the sealing cover 20.

[0020] FIG. 9 is a perspective cross-sectional view of the packing portion and its surroundings. As shown in FIG. 9, the packing portion 22 has a three-stage structure consisting of a fitting portion 22a, a buffer portion 22b, and a square tube portion 22c. The fitting portion 22a is a portion that fits onto the end of the flat plate portion 21. The buffer portion 22b is a packing having a hollow diaphragm structure. The rectangular tube portion 22c is a hollow rectangular portion, and the magnet 8 is inserted therein. The lower surface of the rectangular tube portion 22c forms the abutment portion 23. The magnet 8 is a rod-shaped permanent magnet, and in a preferred example, a rubber magnet is used. In other words, the abutment portion 23 has the magnet 8.

[0021] The packing portion 22 is a packing made of an elastic material molded by extrusion molding of resin. In a preferred example, vinyl chloride is used as the material for the packing portion 22. However, the material is not limited to vinyl chloride, and any elastic material may be used for the packing portion 22, such as silicone resin or elastomer. As shown in FIG. 3, the packing portion 22 is attached in a rectangular ring shape surrounding the outer periphery of the flat plate portion 21, and the abutting portion 23 is also provided in a rectangular ring shape. In other words, the packing portion 22 made of an elastic member is provided between the flat plate portion 21 and the abutting portion 23 .

[0022] As a result, even if there is variation in the degree of contact of the sealing cover 20, the degree of contact is made more uniform because the cushioning effect of the packing part 22 is added to the cushioning effect of the biasing part 3. Furthermore, since the magnet 8 of the contact part 23 is attracted to the top plate part 30, the contact part 23 can be made to adhere tightly to the top plate part 30.

[0023] ***Application to sheet manufacturing equipment*** FIG. 10 is a schematic diagram of a sheet manufacturing apparatus. The above-described storage section 100 can be suitably applied to the sheet manufacturing apparatus 200.

[0024] The sheet manufacturing apparatus 200 manufactures sheets from scraps of paper such as waste paper using a dry process. Note that the sheet manufacturing apparatus to which the storage unit 100 can be applied is not limited to a dry process, and may be a wet process. In this embodiment, the dry process refers to a process that is carried out in air such as the atmosphere, rather than in a liquid.

[0025] 10, the sheet manufacturing apparatus 200 has a first unit group 111, a second unit group 112, and a third unit group 113. The first unit group 111, the second unit group 112, and the third unit group 113 are collectively referred to as a processing section 150. The first unit group 111, the second unit group 112, and the third unit group 113 are supported by a frame (not shown).

[0026] 10, the direction in which the pieces of paper C, sheet P3, slit pieces S, and unnecessary scraps move is indicated by white arrows. In the sheet manufacturing apparatus 200, the side ahead in the conveying direction of the pieces of paper C, web W, sheet P3, etc. is sometimes referred to as downstream, and the side going upstream in the conveying direction is sometimes referred to as upstream. In the following description, a collection of pieces of paper C made up of multiple pieces of paper C is also simply referred to as piece of paper C.

[0027] The sheet manufacturing apparatus 200 manufactures a sheet P3 from a piece of paper C. In the sheet manufacturing apparatus 200, a first unit group 111, a second unit group 112, and a third unit group 113 are arranged from the X-minus direction to the X-plus direction. The first unit group 111 is connected to the storage section 100. The pieces of paper C are supplied from the storage section 100 to the first unit group 111 via the discharge section 39, and then transported to the third unit group 113 via the pipe 92. The pieces of paper C are then defibrated in the third unit group 113 to become fibers, and then made into a mixture containing a binder and the like. The mixture is transported to the second unit group 112 via the pipe 94. The mixture is made into a web W in the second unit group 112, and then formed into a belt-shaped sheet P1. The belt-shaped sheet P1 is cut in the first unit group 111 to become a sheet P3.

[0028] The first unit group 111 includes a measuring unit 15, a junction unit 17, and a pipe 92. In the first unit group 111, these components are arranged in the above order from upstream to downstream. The first unit group 111 also includes a first cutting unit 81, a second cutting unit 82, a tray 91, and a shredding unit 95. The first cutting unit 81 and the second cutting unit 82 cut the strip-shaped sheet P1 into sheets P3 of a predetermined shape. The first unit group 111 also includes a water supply unit 87. The water supply unit 87 is a water storage tank. The water supply unit 87 supplies water for humidification to each of a first humidifier unit 85 and a second humidifier unit 86, which will be described later, via a water supply pipe (not shown).

[0029] The storage unit 100 stores scraps of paper C, which are the raw material for the sheets P3, and supplies them downstream via the discharge unit 39. The scraps of paper C contain fibers such as cellulose and are, for example, shredded waste paper. Humidified air is supplied into the storage unit 100 from the second humidifier 86 provided in the second unit group 112. The pieces of paper C are temporarily stored in the storage unit 100, and then transported to the measuring unit 15 via the discharge unit 39. The sheet manufacturing apparatus 200 may be provided with a shredder upstream of the storage unit 100 that shreds the pieces of paper C and the like.

[0030] The measuring unit 15 has a sensor unit 15a and a supply mechanism (not shown). The sensor unit 15a measures the mass of the pieces of paper C. The supply mechanism supplies the pieces of paper C weighed by the sensor unit 15a to the downstream junction 17. That is, the measuring unit 15 weighs the pieces of paper C by a predetermined mass using the sensor unit 15a, and supplies them to the downstream junction 17 using the supply mechanism. The sensor unit 15a can be either a digital or analog weighing mechanism. Specifically, the sensor unit 15a can be a physical sensor such as a load cell, a spring balance, or a balance. In this embodiment, a load cell is used as the sensor unit 15a. The predetermined mass at which the sensor unit 15a weighs the piece of paper C is, for example, several grams to several tens of grams.

[0031] The measuring unit 15 measures and supplies the pieces of paper C in batches. That is, the supply of the pieces of paper C from the measuring unit 15 to the junction 17 is performed intermittently. The measuring unit 15 may have multiple combinations of sensor units 15a and supply mechanisms, and the multiple sensor units 15a may be operated at staggered times to improve the efficiency of measuring and supply. The sheet manufacturing apparatus 200 has two sensor units 15a and a supply mechanism attached to each. As a result, the pieces of paper C are transported alternately to the junction 17 from the two sets of sensor units 15a and supply mechanisms.

[0032] At the confluence 17, the pieces of paper C supplied from the measuring unit 15 are combined with the fine fragments of the slit pieces S supplied from the shredding unit 95 and mixed together. The slit pieces S and the shredding unit 95 will be described later. The pieces of paper C mixed with the fine fragments flow from the confluence 17 into the pipe 92. The piping 92 transports the pieces of paper C from the first unit group 111 to the third unit group 113 via the second unit group 112 by means of the suction airflow generated by the downstream defibrating unit 33.

[0033] The third unit group 113 has a defibrating unit 33, which is a dry type defibrator, a separating unit 34, piping 93, a mixing unit 36, and piping 94. Furthermore, the third unit group 113 also has a piping 96 branching off from the separating unit 34, a waste powder collecting unit 46 to which the piping 96 is connected, and a power supply unit 69.

[0034] The pieces of paper C transported through the piping 92 flow into the defibrating unit 33. The defibrating unit 33 dry-defibrates the pieces of paper C supplied from the measuring unit 15 into fibers. A known defibrating mechanism can be applied to the defibrating unit 33. The defibrating unit 33 may have the following configuration, for example. The defibrating unit 33 includes a stator and a rotor. The stator has a substantially cylindrical inner surface. The rotor is installed inside the stator and rotates along the inner surface of the stator. The small pieces of paper C are sandwiched between the inner surface of the stator and the rotor and are defibrated by the shear force generated between them. This causes the tangled fibers contained in the paper pieces C to be untangled. The paper pieces C are converted into fibers and transported to the separation unit 34.

[0035] The separation unit 34 separates the defibrated fibers. More specifically, the separation unit 34 removes components contained in the fibers that are unnecessary for manufacturing the sheet P3. Specifically, the separation unit 34 separates relatively long fibers from relatively short fibers. Relatively short fibers are separated in the separation unit 34 because they may reduce the strength of the sheet P3. The separation unit 34 also separates and removes coloring materials and additives contained in the pieces of paper C. Known technologies such as a disk mesh method can be applied to the separation unit 34. Humidified air is supplied to the interior of the separation unit 34 from the second humidifier 86 of the second unit group 112. The defibrated fibers are removed of short fibers that are not suitable for recycling and waste powder such as coloring materials contained in the paper pieces, and are then transported to the mixing section 36 via piping 93 by an airflow generated by a blower (not shown) located at the tip of the airflow piping 35.

[0036] The gas containing the waste powder then flows into the filter section 37 of the waste powder collection section 46 via piping 96. After the waste powder is removed from the filter, the gas is discharged from the exhaust port. The waste powder is collected in the waste powder box 38. The waste powder collection section 46 is a bag filter, and is equipped with a blower 43 that generates an exhaust flow and a compressor 44 that generates compressed air to clean the filter.

[0037] The mixing unit 36 ​​mixes powder additives such as binders with the fibers in the air to form a mixture. The mixing unit 36 ​​includes a powder supply mechanism 19. The powder supply mechanism 19 has a built-in hopper. A powder supply container 29 is attached to the powder supply mechanism 19. Although not shown, the mixing unit 36 ​​also includes a flow path for transporting the fibers, a valve, and a fan in addition to the powder supply mechanism 19. The hopper sends binder powder supplied from the powder supply container 29 into the flow path. The sheet manufacturing apparatus 200 uses starch as a binder for the fibers. A valve (not shown) adjusts the flow rate, i.e., the mass, of the binder supplied from the hopper to the flow path. This adjusts the mixture ratio of the fibers and binder. In addition to the powder supply container 29 and powder supply mechanism 19 that supply the binder, the mixing section 36 may also include a similar configuration for supplying colorants, additives, etc. The fan in the mixing section 36 generates an airflow that transports the fibers downstream while mixing the binder, etc. into the air to form a mixture. The mixture flows from the mixing section 36 into the pipe 94.

[0038] The power supply unit 69 has a power supply device (not shown) that supplies power to the control unit 45 and the sheet manufacturing apparatus 200. The power supply unit 69 distributes power supplied from an external source to each component of the sheet manufacturing apparatus 200. The control unit 45 controls all the components of the sheet manufacturing apparatus 200. The control unit 45 may be connected to a computer 76. The computer 76 is, for example, a notebook computer.

[0039] The second unit group 112 deposits and compresses the mixture containing fibers to form a belt-shaped sheet P1, which is recycled paper. The second unit group 112 includes a depositing unit 48, a first conveying unit 83, a second conveying unit 84, a first humidifying unit 85, a second humidifying unit 86, a drainage unit 88, and a forming unit 70. In the second unit group 112, the deposition section 48, the first conveyance section 83, the second conveyance section 84, the first humidification section 85, and the forming section 70 are arranged in the above order from upstream to downstream. The second humidification section 86 is arranged below the first humidification section 85.

[0040] The deposition unit 48 deposits the mixture containing the separated fibers in the air to generate a web W. The deposition unit 48 has a drum member 53, blade members 55 installed inside the drum member 53, a housing 51 that houses the drum member 53, and a suction unit 59. The mixture is taken into the drum member 53 through a pipe 94. A first conveying unit 83 is disposed below the accumulation unit 48. The first conveying unit 83 has a mesh belt 83a and five tension rollers (not shown) that tension the mesh belt 83a. The suction unit 59 faces the drum member 53 in the direction along the Z axis, with the mesh belt 83a sandwiched between them.

[0041] The blade member 55 is located inside the drum member 53 and is driven to rotate by a motor (not shown). The drum member 53 is a semi-cylindrical sieve. A mesh that functions as a sieve is provided on the downward-facing side of the drum member 53. The drum member 53 allows particles such as fibers and mixtures that are smaller than the size of the mesh openings of the sieve to pass from the inside to the outside. The mixture is agitated by rotating blade members 55 inside drum member 53 and then discharged to the outside of drum member 53. Humidified air is supplied to the inside of drum member 53 from second humidifying section 86.

[0042] The suction unit 59 is disposed below the drum member 53. The suction unit 59 sucks air from inside the housing 51 through multiple holes in the mesh belt 83a. The multiple holes in the mesh belt 83a allow air to pass through but prevent fibers and binders contained in the mixture from passing through. As a result, the mixture discharged to the outside of the drum member 53 is sucked downward together with the air. The suction unit 59 is a known suction device such as a blower. The mixture is dispersed in the air within the housing 51 and is deposited on the upper surface of the mesh belt 83a by gravity and the suction of the suction section 59 to form the web W.

[0043] The mesh belt 83a is an endless belt stretched over five tension rollers. The mesh belt 83a rotates counterclockwise in FIG. 10 due to the rotation of the tension rollers. As a result, the mixture is continuously deposited on the mesh belt 83a, forming a web W. The web W contains a relatively large amount of air and is soft and inflated. The first conveying section 83 conveys the formed web W downstream by the rotation of the mesh belt 83a.

[0044] The second conveying section 84 is located downstream of the first conveying section 83 and conveys the web W in place of the first conveying section 83. The second conveying section 84 peels the web W from the upper surface of the mesh belt 83a and conveys it toward the forming section 70. The second conveying section 84 is located above the conveying path of the web W and slightly upstream of the starting point of the return side of the mesh belt 83a. The positive X side of the second conveying section 84 and the negative X side of the mesh belt 83a partially overlap in the vertical direction. The second conveying section 84 has a transport belt, multiple rollers, and a suction mechanism (not shown). The transport belt has multiple holes to allow air to pass through. The transport belt is stretched over multiple rollers and rotates with the rotation of the rollers. The second conveying section 84 adsorbs the upper surface of the web W to the lower surface of the transport belt by using negative pressure generated by the suction mechanism. When the transport belt rotates in this state, the web W is adsorbed to the transport belt and transported downstream.

[0045] The first humidifying section 85 humidifies the web W containing fibers deposited in the depositing section 48 of the second unit group 112. More specifically, the first humidifying section 85 is, for example, a mist-type humidifier, and humidifies the web W transported by the second conveying section 84 by supplying mist M from below. The first humidifying section 85 is disposed below the second conveying section 84 and faces the web W transported by the second conveying section 84 in the direction along the Z axis. A known humidifying device, for example, an ultrasonic type, can be used for the first humidifying section 85. By humidifying the web W with the mist M, the function of the starch as a binder is promoted, and the strength of the sheet P3 is improved. In addition, since the web W is humidified from below, droplets from the mist are prevented from falling onto the web W. Furthermore, since the web W is humidified from the side opposite the contact surface between the transport belt and the web W, sticking of the web W to the transport belt is reduced. The second transport section 84 transports the web W to the forming section 70.

[0046] The forming unit 70 has processing rollers 71 and 72. The processing rollers 71 and 72 compress the web W containing fibers and form it into a strip-shaped sheet P1. The processing rollers 71 and 72 form a pair, and each has an electric heater built in to increase the temperature of the roller surface. The processing rollers 71 and 72 are each a substantially cylindrical member. The rotation axis of the processing roller 71 and the rotation axis of the processing roller 72 are arranged along the Y axis. With respect to the transport path of the web W, the processing roller 71 is arranged substantially above, and the processing roller 72 is arranged substantially below. A gap is provided between the side surface of the processing roller 71 and the side surface of the processing roller 72 according to the thickness of the sheet P3 to be manufactured.

[0047] The processing rollers 71 and 72 are driven to rotate by a stepping motor (not shown). The web W is sandwiched between the processing rollers 71 and 72 and sent downstream while being heated and pressurized. That is, the web W continuously passes through the forming unit 70 and is press-formed while being heated. By using the processing rollers 71 and 72 as a pair of forming members, the web W can be efficiently heated and pressurized.

[0048] By passing through the forming section 70, the web W, which is soft and contains a relatively large amount of air, has the air contained therein reduced and the fibers are bound together by the binder, so that the web W is formed into a belt-shaped sheet P1. The belt-shaped sheet P1 is transported to the first unit group 111 by transport rollers (not shown).

[0049] Second humidifier 86 is disposed below first humidifier 85. A known evaporative humidifier can be used for second humidifier 86. An example of an evaporative humidifier is one that blows air onto a moistened nonwoven fabric or the like to evaporate the moisture and generate humidified air.

[0050] The second humidifying section 86 humidifies a predetermined area of ​​the sheet manufacturing apparatus 200. The predetermined area is one or more of the storage section 100, the separation section 34, and the inside of the drum member 53 of the accumulation section 48. Specifically, humidified air is supplied to the above-mentioned area from the second humidifying section 86 via multiple pipes (not shown). In each of the above-mentioned configurations, the humidified air suppresses the electrostatic charge on the paper pieces C, fibers, etc., and prevents them from adhering to the members due to static electricity.

[0051] The drainage unit 88 is a drainage tank. The drainage unit 88 is used in the first humidifying unit 85, the second humidifying unit 86, etc., and collects and stores old water. The drainage unit 88 can be removed from the sheet manufacturing apparatus 200 as needed, allowing the accumulated water to be discarded.

[0052] The strip-shaped sheet P1 transported to the first unit group 111 reaches the first cutting section 81. The first cutting section 81 cuts the strip-shaped sheet P1 in a direction intersecting the transport direction, for example, along the Y axis. The strip-shaped sheet P1 is cut into single sheets P2 at the first cutting section 81. The single sheets P2 are transported from the first cutting section 81 to the second cutting section 82. The second cutting section 82 cuts the single sheet P2 in the conveyance direction. Specifically, the second cutting section 82 cuts the single sheet P2 near both sides in the direction along the X axis. As a result, the single sheet P2 becomes a sheet P3 of a predetermined shape, such as A4 size or A3 size.

[0053] When the second cutting section 82 cuts the single sheets P2 into sheets P3, slit pieces S, which are scraps, are generated. The slit pieces S are transported downward to the shredding section 95, which is a shredder. The shredding section 95 shreds the slit pieces S into small pieces and supplies them to the junction 17. A mechanism may be installed between the shredding section 95 and the junction 17 to weigh the small pieces of the slit pieces S and supply them to the junction 17. The sheet P3 is conveyed substantially upward and accumulated on the tray 91. In this manner, the sheet P3 is manufactured by the sheet manufacturing apparatus 200. The sheet P3 can be used as a substitute for, for example, copy paper.

[0054] In other words, the sheet manufacturing apparatus 200 has a storage unit 100 that stores the paper pieces C, and a processing unit 150 that uses the paper pieces C as raw material to produce recycled paper by a dry process.

[0055] As described above, the sheet manufacturing apparatus 200 of this embodiment can provide the following effects. The sheet manufacturing apparatus 200 has a storage section 100 for storing paper scraps C, and a processing section 150 for dry-processing recycled paper using the paper scraps C as raw material, and the storage section 100 has an openable / closable lid section 50, which includes an outer cover 10 and a sealing cover 20 that covers the inlet 31 of the storage section 100, and the outer cover 10 and the sealing cover 20 open and close in conjunction with each other via the biasing section 3.

[0056] This provides good operability because the exterior cover 10 and the sealing cover 20 open and close in conjunction with each other. Also, good sealing performance is achieved by covering the insertion port 31 with the sealing cover 20 biased by the biasing unit 3. Furthermore, because the exterior cover 10 is separate from the sealing cover 20, there is a high degree of freedom in exterior design. Therefore, it is possible to provide a sheet manufacturing apparatus 200 that is easy to operate and has a lid portion 50 for the storage portion 100 that has excellent sealing properties and design.

[0057] Moreover, the biasing portions 3 are elastic members provided between the exterior cover 10 and the sealing cover 20. With this, even if there is variation in the degree of contact of the sealing cover 20 when the lid portion 50 is closed, the degree of contact can be made uniform by the cushioning effect of the biasing portions 3 arranged at the four corners of the flat plate portion 21.

[0058] The sealing cover 20 also has a flat plate portion 21 that covers the insertion port 31, and an abutment portion 23 that surrounds the flat plate portion 21 and abuts against the periphery of the insertion port 31, and a gasket portion 22 made of an elastic material is provided between the flat plate portion 21 and the abutment portion 23. With this, even if there is variation in the contact state of the sealing cover 20, the packing portion 22 acts as a buffer member to absorb the variation, thereby improving the sealing performance.

[0059] Moreover, the top plate portion 30 having the insertion port 31 is made of a magnetic material, and the contact portion 23 has a magnet 8. According to this, the contact portion 23 can be brought into close contact with the top plate portion 30 around the insertion opening 31 by the attraction of the magnet 8, and therefore the sealing performance of the sealing cover 20 can be improved. [Explanation of symbols]

[0060] 3... biasing portion, 6... rotating shaft, 8... magnet, 10... exterior cover, 10a... top surface of lid, 10b... front surface of lid, 10c... bottom, 11... handle, 15... measuring portion, 15a... sensor portion, 17... confluence portion, 19... powder supply mechanism, 20... sealing cover, 21... flat plate portion, 22... packing portion, 22a... joint portion, 22b... buffer portion, 22c... square tube portion, 23... abutment portion, 29... powder supply container, 30... top plate portion, 31... inlet, 32 ...Storage chamber, 33...Fiber defibration section, 34...Separation section, 35...Air flow piping, 36...Mixing section, 37...Filter section, 38...Waste powder box, 39...Discharge section, 40...Triangular frame, 40a...Frame, 40b...Frame, 40c...Support frame, 41...Through hole, 43...Blower, 44...Compressor, 45...Control section, 46...Waste powder collection section, 48...Deposition section, 50...Lid section, 51...Housing, 53...Drum member, 55 ...blade member, 59...suction section, 61...first engagement section, 61b...returning section, 62...second engagement section, 63...first member, 64...second member, 65...third member, 66...engagement shaft, 67...long hole, 69...power supply section, 70...forming section, 71...processing roller, 72...processing roller, 76...computer, 81...first cutting section, 82...second cutting section, 83...first conveying section, 83a...mesh belt, 84...second conveying section, 85... First humidification section, 86...second humidification section, 87...water supply section, 88...drainage section, 91...tray, 92...piping, 93...piping, 94...piping, 95...shredding section, 96...piping, 100...storage section, 100a...top, 100b...front, 111...first unit group, 112...second unit group, 113...third unit group, 150...processing section, 200...sheet manufacturing device, C...paper piece, P1...sheet, P2...sheet, P3...sheet.

Claims

1. a storage section for storing paper slips; a processing unit for producing recycled paper using the paper scraps as raw material in a dry process, The storage section includes an openable / closable lid section, The lid portion includes an exterior cover and a sealing cover that covers the inlet of the storage portion, The exterior cover and the sealing cover open and close in conjunction with each other via a biasing portion. Sheet manufacturing equipment.

2. The biasing portion is an elastic member provided between the exterior cover and the sealing cover. The sheet manufacturing apparatus according to claim 1 .

3. The sealing cover is A flat plate portion covering the insertion port; a contact portion provided around the flat plate portion and contacting the periphery of the insertion port; A packing made of an elastic material is provided between the flat plate portion and the abutment portion. The sheet manufacturing apparatus according to claim 1 or 2.

4. the top plate portion having the insertion port is made of a magnetic material, The abutment portion has a magnet. The sheet manufacturing apparatus according to claim 3 .

Images