Apparatus for producing sheet

Abstract

To dispose efficiently a plurality of boards while suppressing noise.SOLUTION: An apparatus for producing a sheet includes: a processing part for producing a sheet by processing used paper; a frame for supporting the processing part; and boards attached to the frame so that at least one part is covered by the frame, where the boards include a control board for processing the processing part, and a power supply board for supplying voltage to the processing part and the control board, and the control board and the power supply board are attached to the frame while scattering with such a posture as to be arranged in a space not to interfere the processing part.SELECTED DRAWING: Figure 3

Description

[Technical Field]

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

[0002] Conventionally, as shown in Patent Document 1, a device that can be divided into several substrates has been disclosed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-235289 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the above-mentioned device does not take into consideration the efficient arrangement of multiple substrates while suppressing noise such as radio waves. [Means for solving the problem]

[0005] The sheet manufacturing apparatus comprises a processing section that processes waste paper to produce sheets, a frame that supports the processing section, and a base plate that is attached to the frame so that at least a portion of the base plate is covered by the frame, and the base plate includes a control board that processes the processing section and a power supply board that supplies voltage to the processing section and the control board, and the control board and the power supply board are attached to the frame in a distributed manner in an orientation that positions them in a space that does not interfere with the processing section. [Brief explanation of the drawings]

[0006] [Figure 1] FIG. 2 is a block diagram showing the configuration of each unit of the sheet manufacturing apparatus. [Figure 2] 3 is a diagram showing the layout of substrates in each unit of the sheet manufacturing apparatus. [Figure 3]FIG. 10 is a schematic diagram showing the mounting of a substrate to a frame. DETAILED DESCRIPTION OF THE INVENTION

[0007] 1. Structure of sheet manufacturing equipment The configuration of a sheet manufacturing apparatus 1 according to an embodiment will be described with reference to Fig. 1. Directions in each drawing will be described using a three-dimensional coordinate system. For ease of explanation, the positive direction of the Z axis will be referred to as the upward direction or simply "up," and the negative direction will be referred to as the downward direction or simply "down," the positive direction of the X axis will be referred to as the rightward direction or simply "right," and the negative direction will be referred to as the leftward direction or simply "left," and the positive direction of the Y axis will be referred to as the backward direction or simply "backward," and the negative direction will be referred to as the forward direction or simply "front."

[0008] 1, the sheet manufacturing apparatus 1 is a device that manufactures a cut-sheet shaped sheet S3 by a so-called dry method from a raw material G. The raw material G may contain various fibers, various fiber materials, and the like. In the embodiment, the dry method means that the production of the sheet S3 from the raw material G is not carried out in a liquid but in air such as the atmosphere. Note that the sheet manufacturing apparatus 1 is not limited to a dry method, and may be a so-called wet method.

[0009] In the following description, in the sheet manufacturing apparatus 1, the raw material G is assumed to move from upstream to downstream along the white arrows shown in Fig. 1 while sequentially changing form from web W to sheet S1, sheet S2, and sheet S3. Note that in the following description, each step of manufacturing the sheet S3 from the raw material G will be collectively referred to as "processing," and each component performing the processing will be collectively referred to as "processing section."

[0010] 1, the sheet manufacturing apparatus 1 is configured so as to be divisible into a plurality of units such as a first unit 101, a second unit 102, and a third unit 103. In each unit, processing sections are disposed in a distributed manner. Each unit is covered by a case (not shown). Casters (not shown) are attached to the bottom of each case. Each unit can be moved individually when separated. The sheet manufacturing apparatus 1 may be made up of two units, or may be made up of four or more units.

[0011] In the sheet manufacturing apparatus 1, the raw material G is subjected to processes such as defibration in the first unit 101, and then conveyed to the second unit 102 via the pipe 24. The raw material G is made into a web W in the second unit 102, and then formed into a belt-shaped sheet S1. The belt-shaped sheet S1 is cut in the third unit 103 and manufactured into a sheet S3 of a predetermined size.

[0012] First, a description will be given of the third unit 103. The third unit 103 includes a processing section on the most upstream side where the raw material G is input, and a processing section on the most downstream side where the sheet S3 is produced. Specifically, the third unit 103 has, on its upstream side, a buffer tank 13, a constant volume supply unit 15, a junction unit 17, and a pipe 21. The third unit 103 also has, on its downstream side, a first cutting unit 81, a second cutting unit 82, and a tray 91.

[0013] The raw material G is fed into the buffer tank 13 through the raw material inlet 11. The raw material G contains fibers such as cellulose, and is, for example, pieces of shredded waste paper. Note that the third unit 103 may be provided with a shredder, such as a shredding unit 95 (described later), upstream of the buffer tank 13 for shredding waste paper. The raw material G is temporarily stored in the buffer tank 13 and then transported to the constant quantity supply unit 15. Note that humidified air is supplied to the inside of the buffer tank 13 from the second humidifying unit 66 provided in the second unit 102.

[0014] The constant-quantity supply unit 15 has a measuring device 15a and a supply mechanism (not shown). The measuring device 15a measures the mass of the raw material G. The supply mechanism supplies the raw material G measured by the measuring device 15a to the downstream junction 17. That is, the constant-quantity supply unit 15 can measure the raw material G by a predetermined mass using the measuring device 15a and supply it to the downstream junction 17 by the supply mechanism.

[0015] The weighing device 15a is, for example, a physical sensor such as a load cell, a spring balance, a balance, etc. The predetermined mass measured by the weighing device 15a of the raw material G is, for example, about several grams to several tens of grams. The supply mechanism is, for example, a vibrating feeder. The measurement and supply of the raw material G in the constant quantity supply unit 15 is a batch process. That is, the supply of the raw material G from the constant quantity supply unit 15 to the confluence unit 17 is carried out intermittently.

[0016] The confluence section 17 can combine and mix the raw material G supplied from the quantitative supply section 15 with the fine fragments of the slit pieces R supplied from the shredding section 95. The slit pieces R and the shredding section 95 will be described later. The raw material G mixed with the fine fragments of the slit pieces R flows from the confluence section 17 into the pipe 21. The raw material G mixed with fine fragments of the slit pieces R is transported from the third unit 103 to the first unit 101 via a pipe 21 that crosses the second unit 102. A blower (not shown) is provided in the pipe 21. The raw material G is transported through the pipe 21 by the airflow generated by the blower.

[0017] Next, the first unit 101 will be described. In the first unit 101, from upstream to downstream, a defibrating unit 31, a separating unit 32, a piping 23, a mixing unit 33, and a piping 24 are arranged. In addition, the first unit 101 also has a piping 25 connected to the separating unit 32, a collecting unit 35, a compressor 38, and a power supply box 39 arranged therein.

[0018] The raw material G transported through the pipe 21 flows into the defibrating section 31 of the first unit 101. The defibrating section 31 defibrates the raw material G in a dry manner. The defibrating unit 31 includes, for example, a stator and a rotor (both not shown). The stator has a cylindrical inner surface. The rotor is installed inside the stator and rotates along the inner surface of the stator. The small pieces of raw material G are sandwiched between the inner surface of the stator and the rotor and are defibrated by the shear force generated between them. The fibers of the paper pieces and the like are loosened from the raw material G, resulting in fibrous raw material G. The fibrous raw material G is transported to the separation unit 32.

[0019] The separation unit 32 removes components contained in the fibrous raw material G that are unnecessary for producing the sheet S3. Specifically, the separation unit 32 separates the raw material G into long fibers and short fibers. The short fibers are separated in the separation unit 32 because they may reduce the strength of the sheet S3. The separation unit 32 can also separate coloring materials and additives contained in the waste paper. The separation unit 32 can be, for example, a disk mesh system. Humidified air is supplied to the inside of the separation section 32 from the second humidifying section 66 of the second unit 102. The raw material G is transported to the mixing section 33 via the pipe 23, after short fibers and the like are removed.

[0020] The short fibers and the like removed in the separation section 32 are discharged to the recovery section 35 via the pipe 25. The recovery section 35 includes a filter (not shown) and filters out unnecessary parts of the raw material G including the short fibers and the like. The compressor 38 generates compressed air. The filter may become clogged with fine particles contained in the unnecessary portion of the raw material G. The compressor 38 generates compressed air and blows it onto the filter, thereby blowing away the particles adhering to the filter and cleaning it.

[0021] Returning to the explanation of the mixing unit 33, the mixing unit 33 adds a binder and the like to the raw material G containing long fibers and mixes them in the air to form a mixture. Although not shown in the figure, the mixing unit 33 includes a flow path for transporting the raw material G, a fan, a hopper, a supply pipe, a valve, and the like. The hopper communicates with the flow path for the raw material G via a supply pipe and supplies a binder such as starch or resin into the flow path. A valve is provided in the supply pipe between the hopper and the flow path to adjust the mass of binder supplied from the hopper to the flow path, thereby adjusting the mixing ratio of the raw material G and the binder. In addition to the configuration for supplying the binder as described above, the mixing unit 33 may also be configured to supply coloring materials, additives, etc. The fan in the mixer 33 generates an air current, and mixes the raw material G containing long fibers, the binder, etc. in the air. The mixture thus obtained flows from the mixer 33 into the pipe 24.

[0022] The power supply box 39 provided in the first unit 101 converts an external AC voltage such as 100 V or 200 V into a DC voltage such as 24 V or 48 V. As will be described later, the power supply box 39 supplies the converted DC voltage to each unit of the sheet manufacturing apparatus 1.

[0023] Next, the second unit 102 will be described. The second unit 102 has, arranged from upstream to downstream, a deposition section 50, a first transfer section 61, a second transfer section 62, a first humidifying section 65, and a forming section 70. The second unit 102 also has a second humidifying section 66. The deposition unit 50 has a drum member 53, a housing 51 that houses the drum member 53, a blade member 55 installed inside the drum member 53, and a suction unit 59. The deposition unit 50 deposits the mixture in the air to generate the web W.

[0024] Specifically, the mixture is taken into the interior of drum member 53 through pipe 24. A first conveying unit 61 is disposed below deposition unit 50. First conveying unit 61 has a mesh belt 61a and five tension rollers that tension mesh belt 61a. Suction unit 59 is positioned opposite drum member 53 in the vertical direction, with mesh belt 61a sandwiched therebetween.

[0025] The blade member 55 is configured to rotate inside the drum member 53. The drum member 53 is configured to include a semi-cylindrical sieve. Specifically, the drum member 53 has a mesh that functions as a sieve in the lower part. The drum member 53 allows mixture particles that are smaller than the size of the mesh openings of the sieve to pass from the upper interior to the lower exterior. The mixture is taken into the drum member 53 and, while being agitated by the rotating blade member 55, is discharged downward through the mesh of the sieve of the drum member 53. Humidified air is also supplied to the inside of the drum member 53 from the second humidifying section 66.

[0026] The suction unit 59 is disposed below the drum member 53. The suction unit 59 sucks air from inside the housing 51 through a plurality of mesh-like holes in the mesh belt 61a. The plurality of holes in the mesh belt 61a allow air to pass through while blocking fibers, binders, and the like contained in the mixture. The mixture discharged to the outside of the drum member 53 is sucked downward together with air by the suction unit 59. The suction unit 59 is configured, for example, with a suction device such as a blower. After being discharged into the air from the drum member 53 inside the housing 51, the mixture falls due to gravity and the suction force of the suction unit 59 and accumulates on the upper surface of the mesh belt 61a to form a strip-shaped web W.

[0027] The mesh belt 61a is an endless belt stretched over a plurality of tension rollers. The mesh belt 61a rotates counterclockwise as shown in FIG. 1 due to the rotation of the tension rollers. The mixture is deposited on the rotating mesh belt 61a, forming a web W. The web W contains a relatively large amount of air and is soft and inflated. The first conveying section 61 conveys the web W downstream by the mesh belt 61a.

[0028] As will be described later, the second conveying section 62 can convey the web W upward against gravity while adsorbing it. At this time, the second conveying section 62 can receive the web W downstream of the first conveying section 61 while peeling it off from the mesh belt 61a of the first conveying section 61. The second conveying section 62 is disposed above the web W and slightly upstream of the starting point of the return side of the mesh belt 61a. The right side of the second conveying section 62 and the left side of the mesh belt 61a are disposed so as to partially overlap in the vertical direction. As a result, the web W is smoothly transferred from a state in which its lower surface is in contact with the first conveyor section 61 to a state in which its upper surface is in contact with the second conveyor section 62.

[0029] The second conveying section 62 has a transport belt (not shown), multiple rollers, and a suction mechanism (a suction device). The transport belt has multiple holes for air passage. The transport belt is stretched over multiple rollers and rotates with the rotation of the rollers. The transport belt may be an endless mesh belt or may be configured to rotate around rollers. The second conveying section 62 can adsorb the upper surface of the web W to the lower surface of the transport belt by using negative pressure generated by the suction mechanism. The web W is adsorbed to the transport belt against gravity and conveyed to the downstream forming section 70.

[0030] The first humidifying section 65 is disposed below the second conveying section 62 and is positioned opposite the web W conveyed by the second conveying section 62. The first humidifying section 65 is, for example, an ultrasonic humidifier, and supplies mist M from below toward the web W conveyed by the second conveying section 62 to humidify the web W. The air containing the mist M can pass from below to above the web W via the transport belt due to negative pressure created by the suction mechanism.

[0031] By humidifying the web W with the mist M, bonding between the binder contained in the web W and the fibers is promoted when the web W is formed in the downstream forming section 70, thereby improving the strength of the sheet S3. In addition, since the web W is humidified from below, droplets caused by the mist M do not fall onto the web W, preventing uneven moisture in the web W. Furthermore, since the web W is humidified from the side opposite to the surface that contacts the transport belt, the web W is prevented from sticking to the transport belt.

[0032] The forming unit 70 has a pair of heating rollers 71 and 72. Each of the pair of heating rollers 71 and 72 has a built-in electric heater and can heat the roller surface. The web W transported to the forming unit 70 by the second transport unit 62 is heated and pressurized by the heating rollers 71 and 72 of the forming unit 70. At this time, the air contained in the soft web W is reduced, and the fibers are bonded together by the binder, forming a belt-shaped sheet S1. The sheet S1 is transported to the third unit 103 by transport rollers or the like.

[0033] The second humidifying section 66 is disposed below the first humidifying section 65. The second humidifying section 66 is, for example, an evaporative humidifier. The second humidifying section 66 supplies humidified air to various locations, such as the buffer tank 13, the separating section 32, and the interior of the drum member 53, via multiple pipes. The humidified air suppresses the charging of fibers and particles in the raw material G, thereby preventing adhesion due to static electricity.

[0034] The third unit 103 will now be described. The sheet S1 is transported to the first cutting section 81 of the third unit 103. The first cutting section 81 cuts the sheet S1 along a direction intersecting the transport direction, that is, along the front-to-rear direction in FIG. 1. The strip-shaped sheet S1 is cut into sheets S2 of a predetermined length by the first cutting section 81. The sheets S2 of the predetermined length are transported from the first cutting section 81 to the second cutting section 82.

[0035] The second cutting section 82 cuts both ends of the sheet S2 of a predetermined length along the conveyance direction, which is the left-right direction in Fig. 1. As a result, the sheet S2 of a predetermined length has both ends cut off to a predetermined width, and is formed into a sheet S3 of a predetermined size, such as A4 size or A3 size. Sheet S3 is conveyed obliquely upward and placed on tray 91. Sheet S3 can be used as a substitute for copy paper, for example.

[0036] When both ends of the sheet S2 are cut in the second cutting section 82, slit pieces R, which are scraps, are generated. The slit pieces R are transported to the shredding section 95, which is a shredder. The shredding section 95 shreds the slit pieces R into small pieces and supplies them again to the junction 17. Note that a mechanism may be installed between the shredding section 95 and the junction 17 to weigh the small pieces of the slit pieces R and supply them to the junction 17.

[0037] 2.Placement of the board As shown in FIG. 2, the power supply box 39 of the first unit 101, which is one unit of the sheet manufacturing apparatus 1, can generate voltages such as a first voltage V1 of 24 V, a second voltage V2 of 48 V, and earth V3, which is ground potential. These voltages are supplied via cables from the power supply box 39 of the first unit 101 to the other units, the second unit 102 and the third unit 103. Note that the first voltage V1 and the second voltage V2 may be other voltages such as 6 V or 12 V, or may be logic voltages described below.

[0038] The first unit 101 has a first connector CN1, the second unit 102 has second connectors CN21 and CN23, and the third unit 103 has a third connector CN3. The units can be electrically connected to each other via these connectors. The first voltage V1, the second voltage V2, and the ground V3 are supplied from the first unit 101 to the second unit 102 and the third unit 103 via the first connector CN1 of the first unit 101, the second connectors CN21 and CN23 of the second unit 102, and the third connector CN3 of the third unit 103. The ground V3 serves as the reference potential for each unit. It is preferable that at least the first voltage V1 and the ground V3 are supplied from the power supply box 39 of the first unit 101 to the second unit 102 and the third unit 103. The earth V3 may be connected to the first unit 101, the second unit 102, and the third unit 103 independently, without being connected via a connector as described above.

[0039] In the following, for ease of explanation, in each unit, the board that controls the processing unit will be collectively referred to as the control board C, the board that supplies voltage to the processing unit, control board C, etc. will be collectively referred to as the power supply board P, and further, the control board C and power supply board P will be collectively referred to as board B. The power supply substrate P supplies a first voltage V1, a second voltage V2, a ground V3, etc. to the processing unit and the control substrate C. The power supply substrate P may have switching elements such as transistors that turn on and off the supply of the first voltage V1, the second voltage V2, etc. The power supply board P may also have a so-called DC-DC converter to generate a logic voltage such as 3.3V or 5V from the first voltage V1 or the like and supply it to the control board C having a logic circuit. The control board C may also have a DC-DC converter to generate a logic voltage from the first voltage V1 or the like.

[0040] As shown in Fig. 2, control boards C11, C12, and C13 and power supply boards P11 and P12 are attached to the first unit 101. Specifically, the control boards C11, C12, and C13 are attached with their board surfaces facing the Y direction, the power supply board P11 is attached with its board surface facing the X direction, and the power supply board P12 is attached with its board surface facing the Z direction to a frame F shown in Fig. 3 (described below). The board surfaces are surfaces onto which electronic components can be mounted, and are surfaces onto which components can be mounted by soldering or the like. In this way, in the first unit 101, the control boards C11, C12, C13 and the power supply boards P11, P12 are installed in a distributed manner within the first unit 101 in an appropriate orientation that allows them to be efficiently arranged in a space that does not interfere with the processing unit.

[0041] Explaining this with reference to FIG. 1, the first unit 101 includes a processing section including a defibrating section 31, a separating section 32, a mixing section 33, and the like. The first unit 101 can be configured such that the control board C11 controls the defibrating unit 31, the control board C12 controls the separating unit 32, and the control board C13 controls the mixing unit 33, for example. For example, the power supply board P11 can be configured to supply the first voltage V1 to the defibrating unit 31, the separating unit 32, the mixing unit 33, and the control boards C11, C12, and C13. Also, the power supply board P12 can be configured to supply the first voltage V1 to the compressor 38.

[0042] The number of control boards C and power supply boards P in the first unit 101 can be any number. Furthermore, the combination of processing units controlled by each control board C in the first unit 101, and the combination of each control board C and processing unit to which each power supply board P supplies voltage can be any number.

[0043] An openable and closable first cover D1 is attached to the front side of the first unit 101. The control boards C11, C12, and C13 and the power supply boards P11 and P12 are attached to a frame F at a position adjacent to the first cover D1, that is, to a frame F on the front side within the first unit 101. When the worker opens the first cover D1, he or she can access these boards from the front of the first unit 101, facilitating maintenance and other work.

[0044] Next, the control boards C21, C22, C23, and C24 and the power supply board P21 are attached to the second unit 102. Specifically, the control boards C22 and C24 are attached to the frame F with their board surfaces facing the Y direction, the control boards C21 and C23 with their board surfaces facing the Z direction, and the power supply board P21 with its board surface facing the X direction. In this way, in the second unit 102, the control boards C21, C22, C23, C24 and the power supply board P21 are installed in a distributed manner within the second unit 102 in an appropriate orientation that allows them to be efficiently arranged in a space that does not interfere with the processing unit.

[0045] Explaining this with reference to FIG. 1, the second unit 102 includes a processing section including a depositing section 50, a first conveying section 61, a second conveying section 62, a forming section 70, and the like. In the second unit 102, for example, the control board C21 can be configured to control the deposition section 50, the control board C22 to control the first conveying section 61, the control board C23 to control the second conveying section 62, and the control board C24 to control the molding section 70. For example, the power supply board P21 can be configured to supply a first voltage V1 to the deposition unit 50, the first transfer unit 61, the second transfer unit 62, the forming unit 70, and the control boards C21, C22, C23, and C24. The power supply board P21 can also be configured to supply the first voltage V1 to the first humidifier 65 and the second humidifier 66.

[0046] The number of control boards C and power supply boards P in the second unit 102 can be any number. In addition, the combination of processing units controlled by each control board C in the second unit 102, and the combination of each control board C and processing unit to which the power supply board P supplies voltage can be any number.

[0047] An openable second cover D2 is attached to the front side of the second unit 102. The control boards C22, C23, C24 and the power supply board P21 are attached to the front frame F within the second unit 102, which is located adjacent to the second cover D2. When the worker opens the second cover D2, he or she can access these boards from the front of the second unit 102, making it easy to perform maintenance and other work.

[0048] Additionally, an openable and closable top cover E2 is attached to the top side of the second unit 102. The control board C21 is attached to a frame F located adjacent to the top cover E2, that is, to an upper frame F within the second unit 102. When the top cover E2 is opened, an operator can access the control board C21 from above the second unit 102, facilitating work such as maintenance.

[0049] A second unit side cover (not shown) may be provided on the right side of the second unit 102, facing the first unit 101. The power supply board P21 may be attached to the frame F on the right side of the second unit 102, in a position adjacent to the second unit side cover. When an operator separates the second unit 102 from the first unit 101 and opens the second unit side cover, the operator can access the power supply board P21 from the right side of the second unit 102. Alternatively, the worker may open the second cover D2 without separating the second unit 102 and the first unit 101, and access the power supply board P21 from the front of the second unit 102.

[0050] Next, the control boards C31 and C32 and the power supply boards P31 and P32 are attached to the third unit 103. Specifically, the control board C31 and the power supply boards P31 and P32 are attached to the frame F with their board surfaces facing the Y direction, and the control board C32 is attached to the frame F with its board surface facing the X direction. In this way, in the third unit 103, the control boards C31, C32 and the power supply boards P31, P32 are installed in a distributed manner within the third unit 103 in an appropriate orientation that allows them to be efficiently arranged in a space that does not interfere with the processing unit.

[0051] Explaining this with reference to FIG. 1, the third unit 103 includes a processing section including a constant volume supply section 15, a first cutting section 81, a second cutting section 82, and the like. In the third unit 103, for example, the control board C31 can be configured to control the sheet manufacturing apparatus 1 as a main board, and the control board C32 can be configured to control the constant quantity supply unit 15, the first cutting unit 81, and the second cutting unit 82. For example, the power supply board P31 can be configured to supply the first voltage V1 to the constant volume supply unit 15, the first cutting unit 81, the second cutting unit 82, and the control boards C31 and C32. The power supply board P32 can be configured to supply the first voltage V1 to the blower.

[0052] The control board C31 may be configured to be supplied with the second voltage V2 directly from the third connector CN3 or via the power supply board P32. The control board C31 can supply the second voltage V2 to a predetermined processing unit. The number of control boards C and power supply boards P in the third unit 103 can be any. Furthermore, the combination of processing units controlled by each control board C and the combination of control boards C and processing units to which each power supply board P supplies voltage can be any. Furthermore, any control board C may be configured as a main board.

[0053] An openable third cover D3 is attached to the front side of the third unit 103. The control boards C31, C32 and the power supply boards P31, P32 are attached to the front frame F within the third unit 103, which is located adjacent to the third cover D3. When the worker opens the third cover D3, he or she can access these boards from the front of the third unit 103, making it easy to perform maintenance and other work.

[0054] A third unit side cover (not shown) may be provided on the left side of the third unit 103. The control board C32 may be attached to the left frame F within the third unit 103, near the third unit side cover. When the operator opens the third unit side cover, he or she can access the control board C32 from the left side of the third unit 103.

[0055] 3. Installing the board The first unit 101, the second unit 102, and the third unit 103 each include a frame F and a substrate B as shown in Fig. 3. The frame F is configured to support a processing unit and mechanisms attached to the processing unit. The substrates B, such as the control substrate C and the power supply substrate P, are attached to the frame F. The frame F is preferably made of a material that is conductive and has the property of blocking radio waves. Specifically, the frame F is preferably made of a metal such as aluminum, iron, or an alloy.

[0056] The frame F mounts the substrate B in a configuration that covers at least a portion of the substrate B. As shown in Fig. 3, for example, the frame F has a first surface F1 that is the bottom surface that covers the substrate B from below, a second surface F2 that is one side surface that covers the substrate B from the left, a third surface F3 that is the other side surface that covers the substrate B from the right, and a substrate cover F4 that covers the substrate B from above. In the example of Figure 3, the substrate B is oriented with its substrate surface facing in the Z direction, and one of the surfaces of the substrate, the lower surface, is covered by the first surface F1 of the frame F, the other surface of the substrate, the upper surface, is covered by the substrate cover F4, one cross section of the substrate B is covered by the second surface F2, and the other cross section of the substrate B is covered by the third surface F3. With the substrate B sandwiched between them, the first surface F1 of the frame F faces the substrate cover F4, and the second surface F2 of the frame F faces the third surface F3.

[0057] 3, the frame F is configured to have a small gap below and in the front-to-rear direction from the substrate B to prevent interference between the substrate B and the processing section. If there is no risk of interference, the first surface F1, second surface F2, and third surface F3 of the frame F may be configured to extend further below and in the front-to-rear direction, so as to cover the entire substrate B, including the substrate surface and cross section, in a box-like shape. Such a frame F allows a plurality of boards B, such as the control board C and the power supply board P, to be arranged efficiently.

[0058] The second surface F2 and the third surface F3 of the frame F extend a distance T in the vertical direction so that the board B on which the electronic components are mounted can be attached with the board surface facing the Z direction. The distance T is longer than the thickness of the board B plus the height of the electronic components. Board holes H2 are formed in the four corners of the rectangular board B. Furthermore, frame holes H1 are formed in the first surface F1 of the frame F at positions corresponding to the board holes H2 of the board B. Four screws N are passed through the board holes H2 and fastened into the frame holes H1 to attach the four corners of the board B to the frame F. Metal spacers may be sandwiched between the board B and the frame F.

[0059] Furthermore, a board cover F4, which forms part of the frame F, is attached from above to cover the board B. Holes (not shown) may also be formed in the four corners of the board cover F4, allowing four screws N to be fastened through the board cover F4 and board holes H2 into frame holes H1. A metal spacer may be sandwiched between the board B and the board cover F4.

[0060] It is preferable that the screws N and the board cover F4 are also made of a metal such as aluminum, iron, or an alloy. Furthermore, it is preferable that a circuit ground is wired to the board hole H2 of the board B. The circuit ground of the board B can be electrically connected to the ground V3 via the board hole H2, the screws N, the board cover F4, the frame F, etc. In other words, these can be electrically connected.

[0061] In this way, the frame F made of metal is configured to cover at least a part of the substrate B, thereby blocking radio wave noise caused by high frequency signals such as clock signals of the circuit of the substrate B from the outside. As a result, each unit constituting the sheet manufacturing apparatus 1 can be prevented from emitting radio wave noise to the outside. Furthermore, as described above, the earth of the circuit of the substrate B, the substrate hole H2, the screw N, the substrate cover F4, the frame F, and the earth V3 can be electrically connected, which further reduces the radiation of radio noise to the outside from each unit of the sheet manufacturing apparatus 1. These components constituting the sheet manufacturing apparatus 1 can also prevent the circuit of the substrate B from being damaged or malfunctioning due to noise caused by external high voltage discharge such as static electricity.

[0062] In the example of FIG. 3, the substrate B is attached to the front frame F in the sheet manufacturing apparatus 1 with the substrate surface facing the Z direction. The substrate B may be oriented such that the substrate surface faces the X direction, Y direction, etc., differently from the orientation shown in Fig. 3. In this case, the frame F including the substrate cover F4 can be adapted to the orientation of the substrate B, and can cover and attach the substrate B, similar to the case shown in Fig. 3. Such a frame F allows multiple substrates B to be arranged efficiently while suppressing noise. Furthermore, even if the substrate B is in a position different from that shown in FIG. 3, the substrate B can be attached to the frame F at the front of each unit. An operator can access the substrate B by opening a cover such as the first cover D1 from the front.

[0063] 3, the frame F covers the substrate B, whose surface faces the Z direction, with the first surface F1 from below, the second surface F2 from the left, and the third surface F3 from the right, and is covered by the substrate cover F4 from above. Even if the substrate B is in a position different from that shown in FIG. 3, these surfaces of the frame F, including the substrate cover F4, can be configured to cover the substrate B in accordance with the position of the substrate B. Furthermore, even if the board B is in a position different from that shown in Figure 3, the board B can be attached to the frame F adjacent to the top cover E2, the second unit side cover, the third unit side cover, etc. An operator can open these covers and access the board B from directions other than the front.

[0064] As described above, the sheet manufacturing apparatus 1 according to the embodiment includes a processing section that processes raw material G such as waste paper to produce a sheet S3, a frame F that supports the processing section, and a substrate B that is attached to the frame F so as to be at least partially covered by the frame F. The substrate B includes a control substrate C that processes the processing section, and a power supply substrate P that supplies voltage to the processing section and the control substrate C, and the control substrate C and the power supply substrate P are attached to the frame F while being dispersed and in an orientation that allows them to be positioned in a space that does not interfere with the processing section.

[0065] As a result, the sheet manufacturing apparatus 1 can efficiently arrange a plurality of boards B, such as the control board C and the power supply board P, while suppressing external radiation of radio wave noise. In addition, the sheet manufacturing apparatus 1 can also suppress the effects of static electricity and the like. With such a configuration, the sheet manufacturing apparatus 1 can be made smaller, and furthermore, can easily pass EMC (Electromagnetic Compatibility) tests.

[0066] These embodiments have been described in detail above with reference to the drawings, but the specific configurations are not limited to these embodiments, and may be changed, replaced, deleted, etc., as long as they do not deviate from the gist of the present invention. [Explanation of symbols]

[0067] 1...sheet manufacturing equipment, 39...power supply box, 101...first unit, 102...second unit, 103...third unit, B...board, C, C11, C12, C13, C21, C22, C23, C24, C31, C32...control board, CN1...first connector, CN21, CN23...second connector, CN3...third connector, D1...first cover, D2...second cover, D3...third cover, E2...top cover, F...frame, F1...first surface, F2...second surface, F3...third surface, F4...board cover, G...raw material, H1...frame hole, H2...board hole, N...screw, P, P11, P12, P21, P31, P32...power supply board, S1, S2, S3...sheet, V1...first voltage, V2...second voltage, V3...ground.

Claims

1. a processing section for processing waste paper to produce sheets; a frame supporting the processing section; a substrate attached to the frame so as to be at least partially covered by the frame; The boards include a control board that processes the processing unit and a power supply board that supplies voltage to the processing unit and the control board, The control board and the power supply board are attached to the frame in a distributed manner in a position such that they are disposed in a space that does not interfere with the processing section.

2. the frame has a first surface, a substrate cover facing the first surface, a second surface, and a third surface facing the second surface; 2. The sheet manufacturing apparatus according to claim 1, wherein one surface of the substrate surface of the substrate is covered by the first surface, the other surface of the substrate surface is covered by the substrate cover, one cross section of the substrate is covered by the second surface, and the other cross section of the substrate is covered by the third surface.

3. a substrate hole is formed in the substrate, and a frame hole is formed in the first surface of the frame at a position corresponding to the substrate hole; The sheet manufacturing apparatus of claim 2 , wherein screws are fastened through the substrate holes into the frame holes to attach the substrate to the frame.

4. the sheet manufacturing apparatus is configured by a plurality of separable units, and the plurality of units can be electrically connected by connectors; 2. The sheet manufacturing apparatus according to claim 1, wherein one of the units has a power supply box that converts AC voltage to DC voltage, and the power supply box supplies at least a first voltage and a ground to the other of the units via the connector.

5. The sheet manufacturing apparatus according to claim 4 , wherein an openable and closable cover is attached to the unit, and the substrate is attached to the frame at a position adjacent to the cover.

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