Sheet production apparatus

Abstract

To provide a sheet production apparatus capable of preventing insertion of a waste liquid tank into a tank holding part in an erroneous manner.SOLUTION: A sheet production apparatus 1 includes an exhaust port 44 through which water used in a process for forming a fiber-containing material into a sheet P1 is exhausted as waste liquid, a waste liquid tank 42 that receives the waste liquid through a reception port 421, a tank holding part 41 that detachably holds the waste liquid tank 42 at a loading position where the waste liquid can be received, a lid 46 attached to the reception port 421 for covering the reception part 421, and a first contact part 412 that contacts the lid 46 to prevent the waste liquid tank 42 with the lid 46 attached to the reception port 421 from being installed at a loading position. The reception port 421 projects from the top face 42u of the waste liquid tank 42, and the first contact part 412 is provided above the reception part 421.SELECTED DRAWING: Figure 6

Description

[Technical Field]

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

[0002] Patent Document 1 discloses a humidifier including a drain tank with a drain supply port that receives drainage from a water tank, and a pull-out tray on which the drain tank is removably placed. The pull-out tray is guided so that it can move from a retracted position to a pulled-out position. The drain tank receives drainage from the water tank when the pull-out tray is retracted. The drain tank is an example of a waste liquid tank that receives drainage as waste liquid. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-72318 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the humidifier of Patent Document 1, for example, it is possible to push in the pull-out tray on which the drain tank is placed with the front and back facing backwards. In this case, there is a risk that drained water will be discharged from the water tank when the pull-out tray on which the drain tank is placed is pushed in in a state where it cannot receive the drained water. As a result, there is a risk that the drained water will not be received in the drain tank. [Means for solving the problem]

[0005] The sheet manufacturing apparatus includes an outlet for discharging water used in the process of forming a fiber-containing material into a sheet as waste liquid, a waste liquid tank for receiving the waste liquid through a receiving port, a tank holding portion for detachably holding the waste liquid tank in a loading position where it can receive the waste liquid, a lid that is attached to the receiving port to cover the receiving port, and a first contact portion that contacts the lid to prevent the waste liquid tank with the lid attached to the receiving port from being installed in the loading position, wherein the receiving port protrudes from the top surface of the waste liquid tank and the first contact portion is located at a position above the receiving port. [Brief explanation of the drawings]

[0006] [Figure 1] FIG. 1 is a schematic diagram illustrating a configuration of a sheet manufacturing apparatus according to an embodiment. [Figure 2] FIG. [Figure 3] FIG. 10 is a perspective view showing the drainage section with the waste tank in the loaded position. [Figure 4] FIG. 10 is a cross-sectional view showing the drainage section with the waste tank in the loaded position. [Figure 5] FIG. [Figure 6] 10 is a perspective view showing the drainage section when the lid attached to the receiving port of the waste liquid tank comes into contact with the first contact portion. FIG. [Figure 7] 10 is a partial cross-sectional view showing the drainage portion when the lid attached to the receiving port of the waste liquid tank comes into contact with the first contact portion. FIG. [Figure 8] 10 is a perspective view showing the drainage portion when the receiving port of the waste liquid tank is in contact with the second contact portion in an incorrect configuration. FIG. [Figure 9] FIG. 10 is a partial cross-sectional view showing the drainage portion when the receiving port of the waste liquid tank in an incorrect configuration comes into contact with the second contact portion. DETAILED DESCRIPTION OF THE INVENTION

[0007] In the following embodiments, a sheet manufacturing apparatus 1 that recycles fibrous materials such as waste paper into sheets by a dry process will be exemplified as the sheet manufacturing apparatus of the present invention. The sheet manufacturing apparatus 1 will be described below with reference to the drawings. The sheet manufacturing apparatus of the present invention is not limited to a dry process and may be a wet process. In this specification, the term "dry process" refers to a process that is carried out in air such as the atmosphere, rather than in a liquid.

[0008] In each drawing, the same components are denoted by the same reference numerals, and redundant explanations are omitted. In the present specification, the terms "same," "identical," and "simultaneous" do not only refer to being completely identical. For example, in the present specification, when the terms "same," "identical," and "simultaneous" are used, they also include cases where the components are identical taking into account measurement errors. In addition, in the present specification, when the terms "same," "identical," and "simultaneous" are used, they also include cases where the components are identical taking into account manufacturing variations.

[0009] In this specification, the terms "same," "identical," and "simultaneous" are intended to include cases where the same is true to the extent that the functionality is not impaired. For example, "the dimensions of both are the same" means that, taking into account measurement errors and manufacturing variations of components, the difference in the dimensions of both is within ±5% of one dimension, and more preferably within ±3%.

[0010] In each figure, X, Y, and Z represent three spatial axes that are orthogonal to one another. In this specification, the directions along these axes are referred to as the X-axis direction, the Y-axis direction, and the Z-axis direction. When specifying a direction, the positive direction is indicated by "+" and the negative direction by "-", and both positive and negative signs are used to indicate the direction, with the direction indicated by the arrow in each figure being the + direction and the direction opposite the arrow being the - direction.

[0011] The Z-axis direction indicates the direction of gravity, the +Z direction indicates the vertically upward direction, and the -Z direction indicates the vertically downward direction. The plane containing the X-axis and Y-axis is described as the XY plane, the plane containing the X-axis and Z-axis as the XZ plane, and the plane containing the Y-axis and Z-axis as the YZ plane. The XY plane is a horizontal plane. The three spatial axes of X, Y, and Z, which are not limited to positive and negative directions, will be described as the X-axis, Y-axis, and Z-axis.

[0012] The X-axis direction is the horizontal direction along the installation surface, which is a horizontal plane on which the sheet manufacturing apparatus 1 is installed. The Y-axis direction is the horizontal direction along the installation surface on which the sheet manufacturing apparatus 1 is installed. The Z-axis direction is the normal direction to the installation surface on which the sheet manufacturing apparatus 1 is installed, and is the height direction of the sheet manufacturing apparatus 1.

[0013] In the following description, the +Z direction may be referred to as "upward" and the -Z direction may be referred to as "downward." In the following description, in the sheet manufacturing apparatus 1, the end of the conveying direction of the raw material, web W, sheets P1, P2, P3, etc. may be referred to as "downstream," and the upstream side of the conveying direction may be referred to as "upstream." For convenience of illustration, the sizes of each component are different from the actual sizes.

[0014] 1. Embodiment 1 1, the sheet manufacturing apparatus 1 according to this embodiment includes a first unit group 101, a second unit group 102, and a third unit group 103. The first unit group 101, the second unit group 102, and the third unit group 103 are supported by a frame (not shown).

[0015] 1, the directions in which the pieces of paper C, the sheet P3, the slit pieces S, and the unnecessary scraps move are indicated by white arrows. In the following description, a collection of pieces of paper C consisting of multiple pieces of paper C will also be simply referred to as a piece of paper C.

[0016] The sheet manufacturing apparatus 1 manufactures a sheet P3 from paper scraps C, which are a material containing fibers such as waste paper. The paper scraps C are an example of a raw material. In the sheet manufacturing apparatus 1, a first unit group 101, a third unit group 103, and a second unit group 102 are arranged from the -Y direction to the +Y direction in a side view from the -X direction.

[0017] According to the sheet manufacturing apparatus 1 of this embodiment, the sheet P3 can be manufactured from the paper scraps C, and therefore the amount of paper scraps C that is discarded can be reduced by recycling the paper scraps C. Therefore, the sheet manufacturing apparatus 1 of this embodiment can contribute to achieving the Sustainable Development Goals (SDGs) such as Goal 12 "Ensure sustainable consumption and production patterns."

[0018] The pieces of paper C are transported from the first unit group 101 to the second unit group 102 via a pipe 21 that traverses the third unit group 103. The pieces of paper C are then defibrated in the second unit group 102 to become fibers, and then formed into a mixture containing a binder and the like. The mixture is transported via a pipe 24 to the third unit group 103. The mixture is formed into a web W in the third unit group 103, and then formed into a belt-shaped sheet P1. The belt-shaped sheet P1 is cut in the first unit group 101 to become a sheet P3.

[0019] The first unit group 101 includes a raw material supply device 13, a measuring unit 15, a junction unit 17, and a pipe 21. In the first unit group 101, these components are arranged in the above order from upstream to downstream. The first unit group 101 also includes a downstream transport unit 82 of the transport unit 80, a discharge tray 191, and a shredding unit 913.

[0020] The downstream conveying unit 82 has a first cutting section 832 and a second cutting section 834. The first cutting section 832 cuts the strip-shaped sheet P1 into single sheets P2. The second cutting section 834 cuts the single sheets P2 into sheets P3 of a predetermined shape. The first cutting section 832 and the second cutting section 834 are examples of cutters.

[0021] The first unit group 101 has a water supply unit 67. The water supply unit 67 is a water storage tank. The water supply unit 67 supplies water for humidification to each of a first humidifying unit 65 and a second humidifying unit 66 (described later) via a water supply pipe (not shown).

[0022] The raw material supply device 13 stores paper pieces C, which are raw materials for the sheet P3, and supplies them downstream. The raw material supply device 13 has a raw material inlet 131, a storage section 132, and a discharge section 140.

[0023] The pieces of paper C are fed into the storage section 132 from the raw material feed port 131. The pieces of paper C include fibers such as cellulose, and are, for example, shredded waste paper. Humidified air is supplied into the storage section 132 from the second humidifier 66 provided in the third unit group 103.

[0024] The pieces of paper C are temporarily stored in the storage unit 132, and then transported to the measuring unit 15 via the discharge unit 140. The sheet manufacturing apparatus 1 may be provided with a shredder upstream of the storage unit 132 that shreds the pieces of paper C and the like.

[0025] 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.

[0026] 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, a balance, or the like. 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.

[0027] The supply mechanism may be an openable / closable feeder, etc. The supply mechanism may be included in the sensor unit 15a.

[0028] The measurement unit 15 measures and supplies the pieces of paper C in a batch process. That is, the supply of pieces of paper C from the measurement unit 15 to the junction 17 is carried out intermittently. The measurement unit 15 may have multiple combinations of sensor unit 15a and supply mechanism, and multiple sensor units 15a may be operated at staggered times to improve the efficiency of measurement and supply.

[0029] The sheet manufacturing apparatus 1 has two sensor units 15a and a supply mechanism attached to each of them, whereby pieces of paper C are conveyed to the junction 17 alternately from the two sets of sensor units 15a and supply mechanisms.

[0030] 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 913 and mixed together. The slit pieces S and the shredding unit 913 will be described later. The pieces of paper C mixed with the fine fragments flow from the confluence 17 into the pipe 21.

[0031] The pipe 21 transports the pieces of paper C from the first unit group 101 to the second unit group 102 by the suction airflow generated by the downstream defibrating unit 31.

[0032] The second unit group 102 has a defibrating unit 31, which is a dry type defibrator, a separating unit 32, piping 23, a mixing unit 33, and piping 24. In the second unit group 102, these components are arranged in the above order from upstream to downstream. The second unit group 102 also has a piping 25 connected to the separating unit 32, a collecting unit 35, a compressor 38, and a power supply unit 39.

[0033] The paper pieces C transported through the pipe 21 flow into the defibrating unit 31. The defibrating unit 31 dry-defibrates the paper pieces C supplied from the measuring unit 15 into fibers. A defibrating mechanism that uses a rotating rotor or the like can be applied to the defibrating unit 31.

[0034] The defibrating unit 31 of this embodiment defibrates the paper pieces C into fibers in a dry manner, which reduces the amount of water used and the amount of wastewater discharged compared to wet defibration methods in which defibration is performed in water. Therefore, the defibrating unit 31 of this embodiment can contribute to achieving the Sustainable Development Goals (SDGs) such as Goal 6, "Ensure availability and sustainable management of water and sanitation for all." The defibrating unit 31 of this embodiment can contribute to achieving the Sustainable Development Goals (SDGs) such as Goal 14, "Conserve and sustainably use the oceans and marine resources for sustainable development."

[0035] The defibrating unit 31 of this embodiment eliminates the need to dry the defibrated material, thereby reducing the amount of carbon dioxide generated in the process of defibrating the paper pieces C. Therefore, the defibrating unit 31 of this embodiment can contribute to achieving the Sustainable Development Goals (SDGs) such as Goal 13 "Take urgent action to combat climate change and its impacts."

[0036] The defibrating unit 31 may have the following configuration, for example. The defibrating unit 31 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. Small pieces of paper C are sandwiched between the inner surface of the stator and the rotor and 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 made into fibers and transported to the separation unit 32.

[0037] The separation unit 32 separates the defibrated fibers. More specifically, the separation unit 32 removes components contained in the fibers that are unnecessary for the production of the sheet P3. Specifically, the separation unit 32 separates relatively long fibers from relatively short fibers. Relatively short fibers are separated in the separation unit 32 because they may reduce the strength of the sheet P3. The separation unit 32 also separates and removes coloring materials, additives, and the like contained in the pieces of paper C. Technologies such as a disk mesh method can be applied to the separation unit 32.

[0038] Humidified air is supplied to the inside of the separation section 32 from the second humidifying section 66 of the third unit group 103.

[0039] The defibrated fibers, from which relatively short fibers and the like are removed, are transported to a mixing section 33 via a pipe 23. Unnecessary materials such as relatively short fibers and coloring materials are discharged to a recovery section 35 via a pipe 25.

[0040] The mixer 33 mixes the defibrated material with a binder and the like in the air to form a mixture. Although not shown, the mixer 33 is equipped with a flow path for transporting the defibrated material, a fan, a hopper, a supply pipe, and a valve.

[0041] The hopper communicates with the flow path for the defibrated material via a supply pipe. A valve is provided in the supply pipe between the hopper and the flow path. The hopper supplies a binder such as starch into the flow path. The valve adjusts the mass of the binder supplied from the hopper to the flow path. This adjusts the mixing ratio of the fibers and the binder.

[0042] The mixing section 33 may have a similar configuration for supplying coloring materials, additives, etc. in addition to the above-described configuration for supplying the binder.

[0043] The fan of the mixer 33 generates an airflow that transports the defibrated material containing fibers downstream while mixing it with a binder and other materials in the air to form a mixture. The mixture flows from the mixer 33 into the piping 24.

[0044] The collecting section 35 is provided with a filter (not shown) that filters out unnecessary materials such as relatively short fibers carried through the pipe 25 by the air current.

[0045] The compressor 38 generates compressed air. The filter may become clogged with fine particles among the unwanted matter. The filter can be cleaned by blowing the compressed air generated by the compressor 38 onto the filter to blow away the particles that have adhered to it.

[0046] The power supply unit 39 has a power supply device (not shown) that supplies power to the control unit 5 and the sheet manufacturing apparatus 1. The power supply unit 39 distributes power supplied from an external source to each component of the sheet manufacturing apparatus 1.

[0047] Although not shown, the control unit 5 includes a CPU (Central Processing Unit). The control unit 5 also includes a storage unit including a RAM (Random Access Memory), a ROM (Read Only Memory), etc. Various programs for controlling the sheet manufacturing apparatus 1 are stored in the storage unit.

[0048] The control unit 5 may include one or more processors that execute various processes according to a program, one or more dedicated hardware circuits such as an application specific integrated circuit (ASIC), or a combination thereof. The application specific integrated circuit (ASIC) executes at least some of the various processes.

[0049] The processor includes a CPU and memory such as RAM and ROM. The memory stores program code or instructions configured to cause the CPU to perform processes. Memory, i.e., computer-readable media, includes anything that can be accessed by a general-purpose or special-purpose computer.

[0050] The control unit 5 is electrically connected to each component such as a sheet forming unit 70 and a conveying unit 80, which will be described later, and controls the operation of these components in an integrated manner.

[0051] The third unit group 103 deposits a mixture of fibrous material and then compresses it to form a strip-shaped sheet P1. The third unit group 103 includes a depositing section 50, a first conveying section 61, a second conveying section 62, a first humidifying section 65, a second humidifying section 66, a drainage section 40, a sheet forming unit 70, and an upstream conveying unit 81 of the conveying units 80.

[0052] In the third unit group 103, the deposition unit 50, the first conveying unit 61, the second conveying unit 62, the first humidifying unit 65, the sheet forming unit 70, and the upstream conveying unit 81 are arranged in the above order from upstream to downstream. The second humidifying unit 66 is arranged below the first humidifying unit 65.

[0053] The deposition unit 50 deposits the mixture containing the separated fibers in the air to generate the web W. The deposition unit 50 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 from the pipe 24.

[0054] A first conveying unit 61 is disposed below the deposition unit 50. The first conveying unit 61 has a mesh belt 61a and five tension rollers (not shown) that tension the mesh belt 61a. The suction unit 59 faces the drum member 53 in the direction along the Z axis, with the mesh belt 61a sandwiched therebetween.

[0055] 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.

[0056] 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 66.

[0057] 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 61a. The multiple holes in the mesh belt 61a 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 suction device such as a blower.

[0058] The mixture is dispersed in the air within the housing 51 and is deposited on the upper surface of the mesh belt 61a by gravity and the suction of the suction section 59 to form the web W.

[0059] The mesh belt 61a is an endless belt stretched over five tension rollers. The mesh belt 61a rotates counterclockwise in FIG. 1 due to the rotation of the tension rollers. As a result, the mixture is continuously deposited on the 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 formed web W downstream by the rotation of the mesh belt 61a.

[0060] The second conveying unit 62 is located downstream of the first conveying unit 61 and conveys the web W in place of the first conveying unit 61. The second conveying unit 62 peels the web W from the upper surface of the mesh belt 61a and conveys it toward the sheet forming unit 70. The second conveying unit 62 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 61a. The +Y direction of the second conveying unit 62 and the -Y direction of the mesh belt 61a partially overlap in the vertical direction.

[0061] The second conveyor 62 includes a transport belt, multiple rollers, and a suction mechanism (not shown). 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.

[0062] The second conveying section 62 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.

[0063] The first humidifying section 65 humidifies the web W containing fibers deposited in the deposition section 50 of the third unit group 103. More specifically, the first humidifying section 65 is, for example, a mist-type humidifier, and humidifies the web W transported by the second conveying section 62 by supplying mist M from below. The first humidifying section 65 is disposed below the second conveying section 62 and faces the web W transported by the second conveying section 62 in the direction along the Z axis. For example, an ultrasonic humidifying device can be used for the first humidifying section 65.

[0064] 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 conveying section 62 conveys the web W to the sheet forming unit 70.

[0065] The sheet forming unit 70 compresses the web W formed by depositing a mixture of fibrous material to form a strip-shaped sheet P1. The sheet forming unit 70 has processing rollers 71 and 72. 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.

[0066] 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 X 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.

[0067] 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 passes continuously through the sheet 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.

[0068] By passing through the sheet forming unit 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-like sheet P1. The belt-like sheet P1 is transported to the first unit group 101 by the upstream transport unit 81.

[0069] An evaporative humidifier can be applied to second humidifier section 66. 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.

[0070] The second humidifying section 66 humidifies a predetermined area of ​​the sheet manufacturing apparatus 1. The predetermined area is one or more of the storage section 132, the separation section 32, and the inside of the drum member 53 of the accumulation section 50. Specifically, humidified air is supplied to the above-mentioned area from the second humidifying section 66 through 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.

[0071] The drainage unit 40 collects old water as waste liquid after it has been used in the first humidifying unit 65, the second humidifying unit 66, etc. Old water is, for example, water in which bacteria have increased over time or in which precipitates such as calcium carbonate have formed.

[0072] The drainage unit 40 has a waste liquid tank 42, a tank holder 41, a drain pipe 45, a discharge port 44, and a tray 43. The waste liquid tank 42 collects water used in the process of forming the fiber-containing material into the sheet P1 as waste liquid via the drain pipe 45 and the discharge port 44. The waste liquid tank 42 has a receiving port 421 that receives the water discharged from the discharge port 44 as waste liquid. The drainage unit 40 will be described later.

[0073] The strip-shaped sheet P1 transported to the first unit group 101 reaches the first cutting section 832 via the downstream transport unit 82. The first cutting section 832 cuts the strip-shaped sheet P1 in a direction intersecting the transport direction, for example, along the X-axis. The strip-shaped sheet P1 is cut into single sheets P2 by the first cutting section 832. The single sheets P2 are transported from the first cutting section 832 to the second cutting section 834.

[0074] The second cutting unit 834 cuts the single sheet P2 in the conveyance direction, for example, along the Y axis. More specifically, the second cutting unit 834 cuts the single sheet P2 near both sides in the direction along the X axis. The size of the sheet P3 to be manufactured can be adjusted by the first cutting unit 832 and the second cutting unit 834. This cuts the single sheet P2 into sheets P3 of a predetermined shape, such as A4 size or A3 size.

[0075] When the second cutting section 834 cuts the single sheets P2 into sheets P3, slit pieces S, which are scraps, are generated. The slit pieces S are transported in the approximately -Y direction to the shredding section 913, which is a shredder. The shredding section 913 shreds the slit pieces S into small pieces and supplies them to the junction 17. A mechanism may be installed between the shredding section 913 and the junction 17 to weigh the small pieces of the slit pieces S and supply them to the junction 17.

[0076] The sheet P3 is conveyed substantially upward and accumulated on the discharge tray 191. In this manner, the sheet P3 is manufactured by the sheet manufacturing apparatus 1. The sheet P3 can be used as a substitute for, for example, copy paper.

[0077] Next, a description will be given of the drainage unit 40. The drainage unit 40 includes the waste liquid tank 42, the tank holder 41, the drain pipe 45, the discharge port 44, and the tray 43.

[0078] 2 to 5, the waste liquid tank 42 has the above-mentioned receiving port 421 and gripping portions 428 and 429. The waste liquid tank 42 receives the waste liquid through a receiving opening 422 provided in the receiving port 421 when in a loading position (the position shown in FIGS. 3 and 4) where the waste liquid can be received.

[0079] The receiving port 421 protrudes upward from the upper surface 42u of the waste liquid tank 42. When the waste liquid tank 42 is attached to the tank holder 41 in the correct manner as shown in Figures 3 and 4, the receiving port 421 is provided on the -X direction side of the center of the waste liquid tank 42 in the X axis direction.

[0080] The insertion direction of the waste liquid tank 42 into the tank holder 41 (see the white arrow in FIG. 2) is along the X-axis direction, and the -X direction side is the rear side in the insertion direction of the waste liquid tank 42 into the tank holder 41.

[0081] When the waste liquid tank 42 is correctly attached to the tank holding portion 41, the rear end of the waste liquid tank 42 in the insertion direction becomes the grip portion 429. Note that when the waste liquid tank 42 is correctly attached to the tank holding portion 41, the side surface in the +X direction that becomes the front end of the waste liquid tank 42 in the insertion direction is referred to as the front surface 42f.

[0082] The receiving opening 422 opens upward. The sheet manufacturing apparatus 1 is provided with a lid 46 (see FIG. 2) that is attached to the receiving opening 421 to cover the upper part of the receiving opening 422 of the receiving opening 421. For example, the lid 46 and the receiving opening 421 are provided with a spiral groove, and the lid 46 is attached to the receiving opening 421 by screwing it into the receiving opening 421.

[0083] Attaching the lid 46 to the receiving opening 421 prevents the waste liquid in the waste liquid tank 42 from leaking to the outside through the receiving opening 422 due to vibration or the like. When the waste liquid tank 42 is inserted into the tank holding part 41, the lid 46 is removed from the receiving opening 421.

[0084] The tank holder 41 is provided at a loading position where it can receive waste liquid and can hold the waste liquid tank 42. The tank holder 41 detachably holds the waste liquid tank 42 at the loading position. The tank holder 41 has a fixing member 411 to which the discharge port 44 is fixed.

[0085] The fixing member 411 constitutes the -X direction end side from the center in the X axis direction of the upper wall, which is the side wall in the +Z direction of the tank holding portion 41. The fixing member 411 is made of a metal plate-like member.

[0086] The discharge port 44 is attached to a base along the XY plane of the fixed member 411. The discharge port 44 is provided at a position vertically above the receiving opening 422 of the waste liquid tank 42 in the loading position.

[0087] The lower end of the outlet 44, which is the end in the -Z direction from which the waste liquid is discharged at the outlet 44, protrudes in the -Z direction from the base of the fixing member 411. The lower end of the outlet 44 is located in the +Z direction from the receiving opening 422 of the waste liquid tank 42 inserted inside the tank holding part 41.

[0088] A first contact portion 412 is provided at the −X direction end of the fixed member 411. The first contact portion 412 is provided at a rearward bent portion formed by bending the −X direction end of the fixed member 411. The first contact portion 412 is provided so as to extend in the Y axis direction.

[0089] The lower end of the first contact portion 412, which is the end in the -Z direction of the first contact portion 412, is located on the -Z direction side of the discharge port 44. The lower end of the first contact portion 412 is located in the +Z direction from the receiving port 421 of the waste liquid tank 42 inserted inside the tank holding portion 41.

[0090] 7, the lower end of the first contact portion 412 is located in the -Z direction from the upper end of the lid 46 attached to the receiving port 421 of the waste liquid tank 42 inserted inside the tank holding portion 41. The upper end of the lid 46 is the end of the lid 46 attached to the receiving port 421 of the waste liquid tank 42 in the +Z direction.

[0091] Therefore, when an operator attempts to insert the waste liquid tank 42 with the lid 46 attached to the receiving port 421 into the tank holding portion 41, the first contact portion 412 comes into contact with the side of the lid 46 attached to the receiving port 421, as shown in Figures 6 and 7.

[0092] At this time, the waste liquid tank 42 is positioned rearward in the -X direction from the loading position (see FIGS. 3 and 4) in terms of the insertion direction of the waste liquid tank 42. This prevents the waste liquid tank 42 with the lid 46 attached to the receiving opening 421 from being attached to the loading position.

[0093] 4, a second contact portion 413 is provided at the +X direction end of the fixed member 411. The second contact portion 413 is provided at a forward bent portion formed by bending the +X direction end of the fixed member 411.

[0094] The second contact portion 413 is provided on the surface on the −X direction side of the forward bent portion. The second contact portion 413 is provided so as to extend in the Y axis direction. The second contact portion 413 is provided on the +X direction side of the outlet 44.

[0095] The second contact portion 413 is located on the -Z direction side of the discharge port 44. The lower end of the second contact portion 413, which is the -Z direction end of the second contact portion 413, is located in the -Z direction from the upper end of the receiving port 421 of the waste liquid tank 42 inserted inside the tank holding portion 41. The upper end of the receiving port 421 of the waste liquid tank 42 inserted inside the tank holding portion 41 is the +Z direction end of the receiving port 421 of the waste liquid tank 42 inserted inside the tank holding portion 41.

[0096] The waste liquid tank 42 is inserted into the tank holder 41 in the correct position, with the gripping portion 429 of the waste liquid tank 42 at the rear end in the insertion direction of the waste liquid tank 42. When the waste liquid tank 42 is attached to the loading position, as shown in Figures 3 and 4, the receiving port 421 of the waste liquid tank 42 is positioned vertically below the discharge port 44.

[0097] At this time, the gripping portion 429, which is the end of the waste liquid tank 42 in the -X direction, is located in the +X direction from the rear end, which is the end of the tank holding portion 41 in the -X direction. In other words, when the waste liquid tank 42 is inserted into the tank holding portion 41 in the correct manner and attached to the loading position, the waste liquid tank 42 is housed inside the tank holding portion 41.

[0098] Suppose that the waste liquid tank 42 is inserted into the tank holding portion 41 in an incorrect manner, with the front surface 42f of the waste liquid tank 42 being the rear end in the insertion direction of the waste liquid tank 42. Then, as shown in Figures 8 and 9, when the side surface of the receiving opening 421 is in a position where it contacts the second contact portion 413, the front surface 42f, which is the end in the -X direction of the waste liquid tank 42, is located further in the -X direction than the rear end, which is the end in the -X direction of the tank holding portion 41.

[0099] That is, when the side of the receiving port 421 of the waste liquid tank 42 is incorrectly inserted into the tank holding portion 41 and is in a position where it contacts the second contact portion 413, the waste liquid tank 42 protrudes from the tank holding portion 41 in the -X direction.

[0100] Therefore, the operator can easily recognize that the waste liquid tank 42 has been inserted in an incorrect manner into the tank holding portion 41. Therefore, the second contact portion 413 comes into contact with the side surface of the receiving port 421 of the waste liquid tank 42 that is inserted in an incorrect manner into the tank holding portion 41, thereby preventing the waste liquid tank 42 from being erroneously attached to the tank holding portion 41.

[0101] In this embodiment, the second contact portion 413 is provided at a distance in the +X direction from the discharge port 44. This distance is smaller than the dimension in the X-axis direction, which is the diameter of the receiving opening 422 of the receiving port 421.

[0102] Therefore, even when the side of the receiving port 421 of the waste liquid tank 42 is in a position where it contacts the second contact portion 413 when it is inserted incorrectly into the tank holding portion 41, the receiving port 421 is positioned vertically below the discharge port 44.

[0103] For this reason, for example, suppose that the waste liquid tank 42 is inserted incorrectly and left in a position where the side surface of the receiving port 421 of the waste liquid tank 42 contacts the second contact portion 413. Then, even if the waste liquid adhering to the lower end of the discharge port 44 falls due to vibration or the like, the falling waste liquid is received in the waste liquid tank 42 via the receiving port 421.

[0104] 5, the waste liquid tank 42 is provided with grips 428, 429 that an operator can grasp when carrying the waste liquid tank 42. The grip 428 is provided at the center of the top surface 42u of the waste liquid tank 42 and extends in the X-axis direction. The grip 429 is provided at the end in the -X direction, which is the rear end of the waste liquid tank 42 in the insertion direction, and extends in the Z-axis direction. The grip 429 is provided at the center of the waste liquid tank 42 in the Y-axis direction.

[0105] In order to grasp the gripping portion 428, a surface along the XY plane that defines the position in the -Z direction of the space provided vertically below the gripping portion 428 is used as a lid rest 427 that can support the lid 46. In this case, as shown in FIG. 4, when the waste liquid tank 42 is inside the tank holding portion 41, the lid 46 supported by the lid rest 427 is located below the first contact portion 412 and the second contact portion 413.

[0106] It is assumed that the waste liquid tank 42 is inserted into the tank holding part 41 in the correct manner so that the gripping part 429 of the waste liquid tank 42 is at the rear end in the insertion direction of the waste liquid tank 42. Then, as shown in FIG. 4 , when the waste liquid tank 42 is attached to the loading position, the gripping part 428 is located in the +X direction of the discharge port 44, and the gripping part 429 is located in the −X direction of the discharge port 44.

[0107] Suppose that the waste liquid tank 42 is inserted into the tank holding part 41 in an incorrect manner, with the front surface 42f of the waste liquid tank 42 being the rear end in the insertion direction of the waste liquid tank 42. Then, as shown in FIG. 9 , when the side surface of the receiving port 421 of the waste liquid tank 42 is in contact with the second contact part 413, the gripping part 428 is located in the −X direction of the discharge port 44, and the gripping part 429 is located in the +X direction of the discharge port 44.

[0108] In other words, when the side of the receiving port 421 of the waste liquid tank 42 inserted into the tank holding portion 41 is in a position where it contacts the second contact portion 413, the gripping portions 428, 429 are positioned away from the vertically below the discharge port 44.

[0109] For this reason, for example, suppose that waste liquid tank 42 is inserted in an incorrect manner and left in a position where the side surface of receiving port 421 of waste liquid tank 42 contacts second contact portion 413. Then, even if waste liquid adhering to the lower end of discharge port 44 falls due to vibration or the like, gripping portions 428, 429 are unlikely to be contaminated by the falling waste liquid.

[0110] 7, it is assumed that the lid 46 attached to the receiving port 421 of the waste liquid tank 42 inserted into the tank holding part 41 is in a position where it contacts the first contact part 412. At this time, the gripping parts 428, 429 are also located at a position away from the vertically below the discharge port 44.

[0111] 4, the tray 43 has a base portion 431, a handle 434, a mounting portion 435, a tank detection portion 438, a weight detection portion 439, and a receiving portion 432. The waste liquid tank 42 is attached to the tank holding portion 41 in a state where it is placed on the mounting portion 435 of the tray 43.

[0112] The tray 43 is provided so as to be slidable in the X-axis direction relative to the tank holding part 41 with the waste liquid tank 42 placed on the placement part 435. The handle 434 is provided on the side wall of the base part 431 in the -X direction. The tray 43 slides relative to the tank holding part 41 by grasping the handle 434 and moving it in the X-axis direction.

[0113] The tank detection unit 438 detects that the waste liquid tank 42 is placed on the placement unit 435. The tank detection unit 438 is provided, for example, on the side wall of the placement unit 435 in the +X direction. The tank detection unit 438 is provided in the center of the placement unit 435 in the Y-axis direction.

[0114] The tank detection unit 438 comes into contact with the front surface 42f of the waste liquid tank 42 placed on the placement portion 435, thereby detecting that the waste liquid tank 42 is placed on the placement portion 435 of the tray 43. The tank detection unit 438 of this embodiment is a contact sensor.

[0115] If it is possible to detect whether or not the waste liquid tank 42 is placed on the placement portion 435, the tank detection portion 438 may be a non-contact sensor such as a reflective or transmissive photosensor.

[0116] Placement unit 435 is attached to base unit 431 so as to be rotatable around an axis along the Y-axis direction of rotation shaft 436 located at the −X-direction end of placement unit 435. Placement unit 435 maintains its posture by being supported by tension spring 437 attached to base unit 431, which pulls the +X-direction end of placement unit 435 upward.

[0117] When the weight of the waste liquid tank 42 increases due to the receipt of the waste liquid, the mounting portion 435 rotates around the axis of the rotation shaft 436. As a result, the end of the mounting portion 435 in the +X direction is displaced downward in the −Z direction.

[0118] The weight detection unit 439 detects that a predetermined weight of waste liquid has been received in the waste liquid tank 42. In this embodiment, the predetermined weight is the upper limit of the weight of waste liquid that can be received in the waste liquid tank 42.

[0119] The weight detection unit 439 is provided on the base unit 431 on the -Z direction side, below a contacted portion provided on the mounting unit 435. The contacted portion of the mounting unit 435 is a portion near the end of the mounting unit 435 in the +X direction. The weight detection unit 439 comes into contact with the contacted portion of the mounting unit 435 when the waste liquid tank 42 placed thereon contains the upper limit amount of waste liquid.

[0120] The weight detection unit 439 of this embodiment is a contact sensor that detects that a predetermined weight of waste liquid has been received in the waste liquid tank 42 by coming into contact with a contactable portion of the placement unit 435. The weight detection unit 439 may be a non-contact sensor such as a reflective or transmissive photosensor, as long as it can detect that a predetermined weight of waste liquid has been received in the waste liquid tank 42.

[0121] The receiving portion 432 receives waste liquid from above. The receiving portion 432 is provided in a position on the base portion 431 that is below the placing portion 435. The receiving portion 432 is located vertically below the discharge port 44. The receiving portion 432 has a gutter shape that extends in the X-axis direction and whose width in the Y-axis direction narrows toward the +X direction.

[0122] The inner bottom of the tub-shaped receiver 432 has a slope that slopes downward toward the +X direction. This causes the waste liquid received by receiver 432 to move in the +X direction along the inner bottom of the tub-shaped receiver 432. The waste liquid that has moved in the +X direction along the inner bottom of the tub-shaped receiver 432 is collected in a waste liquid storage unit (not shown) via outlet 433 provided at the end of receiver 432 in the +X direction.

[0123] As described above, the sheet manufacturing apparatus 1 according to the first embodiment can provide the following effects.

[0124] The sheet manufacturing apparatus 1 is provided with an outlet 44 that discharges water used in the process of forming a fiber-containing material into a sheet P1 as waste liquid. The sheet manufacturing apparatus 1 is provided with a waste liquid tank 42 that receives the waste liquid through a receiving port 421. The sheet manufacturing apparatus 1 is provided with a tank holding unit 41 that detachably holds the waste liquid tank 42 at a loading position where it can receive the waste liquid. The sheet manufacturing apparatus 1 is provided with a lid 46 that is attached to the receiving port 421 to cover the receiving port 421. The sheet manufacturing apparatus 1 is provided with a first contact portion 412 that comes into contact with the lid 46 to prevent the waste liquid tank 42 attached to the receiving port 421 from being installed in the loading position. The receiving port 421 protrudes from an upper surface 42u of the waste liquid tank 42, and the first contact portion 412 is provided at a position above the receiving port 421.

[0125] This prevents the waste liquid tank 42 with the lid 46 attached to the receiving opening 421 from being held in the tank holding part 41. This makes it possible to provide the sheet manufacturing apparatus 1 that can receive waste liquid in the waste liquid tank 42.

[0126] The sheet manufacturing apparatus 1 further includes a second contact portion 413 that prevents an incorrectly configured waste liquid tank 42 from being attached to the loading position by contacting the side surface of the receiving opening 421. When a correctly configured waste liquid tank 42 is attached to the tank holding portion 41, the receiving opening 421 is located rearward of the center of the waste liquid tank 42 in the insertion direction of the waste liquid tank 42 into the tank holding portion 41.

[0127] This makes it possible to prevent an incorrect type of waste liquid tank from being attached to the tank holding portion 41. This makes it possible to provide a sheet manufacturing apparatus 1 that can receive waste liquid in the waste liquid tank .

[0128] When the side surface of the receiving opening 421 is in a position where it contacts the second contact portion 413, the receiving opening 421 is located vertically below the discharge opening 44. This allows the waste liquid from the discharge opening 44 to be received in the waste liquid tank 42 even if the waste liquid tank 42 is left after being incorrectly inserted into the tank holding portion 41.

[0129] The waste liquid tank 42 has gripping portions 428, 429, which are provided at positions away from the vertically downward direction of the discharge port 44 when the lid 46 attached to the receiving port 421 is in a position where it contacts the first contact portion 412. This makes it difficult for the gripping portions 428, 429 to be contaminated by the waste liquid from the discharge port 44.

[0130] The waste liquid tank 42 has gripping portions 428, 429, which are provided at positions away from the vertically downward direction of the discharge port 44 when the side surface of the receiving port 421 is in a position where it contacts the second contact portion 413. This makes it difficult for the gripping portions 428, 429 to be contaminated by the waste liquid from the discharge port 44.

[0131] The waste liquid tank 42 has a lid rest 427 that can support the lid 46, and when the waste liquid tank 42 is inside the tank holding part 41, the lid 46 supported by the lid rest 427 is positioned below the first contact part 412 and the second contact part 413. This allows the lid 46 removed from the discharge port 44 to be stored near the waste liquid tank 42.

[0132] The sheet manufacturing apparatus 1 further includes a tray 43 on which the waste liquid tank 42 is placed, and the waste liquid tank 42 is attached to the tank holding part 41 while being placed on the tray 43. This makes it easy to attach the waste liquid tank 42 to the tank holding part 41.

[0133] The tray 43 has a receiving portion 432 capable of receiving the waste liquid. This makes it possible to prevent the sheet manufacturing apparatus 1 or the outside of the sheet manufacturing apparatus 1 from being contaminated by the waste liquid.

[0134] The tray 43 has a tank detection unit 438 that detects that the waste liquid tank 42 is placed on the tray 43, and a weight detection unit 439 that detects that a predetermined weight of waste liquid has been received in the waste liquid tank 42.

[0135] This makes it possible to prevent the sheet manufacturing apparatus 1 and the outside of the sheet manufacturing apparatus 1 from being contaminated by the waste liquid discharged from the discharge port 44 or the waste liquid overflowing from the waste liquid tank .

[0136] The sheet manufacturing apparatus 1 according to the first embodiment of the present disclosure is basically configured as described above, but it is of course possible to modify or omit some of the configuration without departing from the gist of the present disclosure. The first embodiment and other embodiments described below can be combined with each other within the scope of technical compatibility. Other embodiments will be described below.

[0137] In the above embodiment, the sheet manufacturing apparatus 1 may not include the second contact unit 413. In this case, the sheet manufacturing apparatus 1 may include a configuration in which the tank detection unit 438 does not detect a waste liquid tank 42 that is placed on the tray 43 in an incorrect manner.

[0138] In the waste liquid tank 42 of the first embodiment, both outer portions in the Y-axis direction of the gripping portion 429 are recessed in the +X direction from the gripping portion 429. In this case, for example, the tank detection unit 438 in the other embodiments may be provided at a position shifted from the center of the mounting portion 435 in the Y-axis direction. As a result, the sheet manufacturing apparatus 1 of the other embodiments has a configuration in which the tank detection unit 438 does not come into contact with the gripping portion 429 of the waste liquid tank 42 placed on the tray 43 with the front-rear direction reversed.

[0139] In this case, the tank detection unit 438 will not detect the waste liquid tank 42 that has been placed in the wrong position on the tray 43, with the front and rear directions reversed. Then, the control unit 5 may cause a notification unit (not shown) to notify the fact that the waste liquid tank 42 may not be placed or may be placed in the wrong position, for example.

[0140] This makes it possible to prevent an incorrect type of waste liquid tank from being attached to the tank holding portion 41. This makes it possible to provide a sheet manufacturing apparatus 1 that can receive waste liquid in the waste liquid tank .

[0141] In the above embodiment, as long as the upper end of the lid 46 on the lid rest portion 427 is positioned below the upper surface 42u of the waste liquid tank 42, the lid rest portion 427 does not need to be positioned vertically below the grip portion 428. For example, the lid rest portion 427 may be provided closer to the front surface 42f, which is the forward side of the grip portion 428 in the insertion direction of the waste liquid tank 42.

[0142] In the above embodiment, the waste liquid tank 42 may be placed on the tray 43 and not attached to the tank holding unit 41. In this case, the waste liquid tank 42 is directly inserted into the tank holding unit 41. In this case, the sheet manufacturing apparatus 1 may not include the tray 43. In this case, the tank detection unit 438 and the weight detection unit 439 may be provided in the tank holding unit 41.

[0143] In the above embodiment, when the side of the receiving port 421 of the waste liquid tank 42 that is incorrectly inserted into the tank holding portion 41 is in a position where it contacts the second contact portion 413, the receiving port 421 does not have to be located vertically below the discharge port 44.

[0144] In the above embodiment, the lid 46 attached to the receiving port 421 of the waste liquid tank 42 inserted into the tank holding part 41 is positioned so as to contact the first contact part 412. At this time, either of the gripping parts 428, 429 may be positioned vertically below the discharge port 44.

[0145] In the above embodiment, it is assumed that the side surface of the receiving port 421 of the waste liquid tank 42 that is incorrectly inserted into the tank holding portion 41 is in a position where it contacts the second contact portion 413. In this case, either of the gripping portions 428, 429 may be located vertically below the discharge port 44.

[0146] In the above embodiment, the waste liquid tank 42 may not have either the gripping portions 428, 429 or one of the gripping portions 428, 429. [Explanation of symbols]

[0147] 1...sheet manufacturing apparatus, 5...control section, 13...raw material supply device, 15...measuring section, 15a...sensor section, 17...junction section, 21, 23, 24, 25...piping, 31...defibrating section, 32...separating section, 33...mixing section, 35...recovery section, 38...compressor, 39...power supply section, 40...drainage section, 41...tank holding section, 42...waste liquid tank, 42f...front surface, 42u...top surface, 43...tray, 44...discharge outlet, 45...drainage pipe, 46...lid, 50...accumulation section, 51...housing, 53...drum member, 55...blade member, 59...suction section, 61...first conveying section, 61a...mesh belt, 62...second conveying section, 65...first humidifying section, 66...second humidifying section, 67...water supply section, 70...sheet forming unit, 71, 72...treatment rollers, 80...conveying unit Knit, 81...upstream conveying unit, 82...downstream conveying unit, 101...first unit group, 102...second unit group, 103...third unit group, 131...raw material inlet, 132...storage section, 140...discharge section, 191...discharge tray, 411...fixing member, 412...first contact section, 413...second contact section, 421...receiving port, 422...receiving opening, 427... Lid rest portion, 428, 429...gripping portion, 431...base portion, 432...receiving portion, 433...flow outlet, 434...handle, 435...placing portion, 436...rotating shaft, 438...tank detection portion, 439...weight detection portion, 832...first cutting portion, 834...second cutting portion, 913...shredding portion, C...paper pieces, M...mist, P1, P2, P3...sheet, S...slit pieces, W...web.

Claims

1. an outlet for discharging water used in the process of forming the fiber-containing material into a sheet as waste liquid; a waste liquid tank that receives the waste liquid through a receiving port; a tank holder that detachably holds the waste liquid tank at a loading position that can receive the waste liquid; a cover that is attached to the receiving opening to cover the receiving opening; a first contact portion that contacts the lid to prevent the waste liquid tank with the lid attached to the receiving port from being attached to the loading position; Equipped with the receiving port protrudes from the upper surface of the waste liquid tank; The first contact portion is provided at a position above the receiving opening. A sheet manufacturing apparatus characterized by:

2. a second contact portion that contacts a side surface of the receiving port to prevent the waste liquid tank from being attached to the loading position in an incorrect manner; When the waste liquid tank in the correct configuration is inserted into the tank holding portion, the receiving port is located rearward of the center of the waste liquid tank in the direction of insertion of the waste liquid tank into the tank holding portion. The sheet manufacturing apparatus according to claim 1 .

3. When the side surface of the receiving opening is in contact with the second contact portion, the receiving opening is positioned vertically below the discharge opening. The sheet manufacturing apparatus according to claim 2 .

4. the waste tank has a grip portion, the gripping portion is provided at a position away from a position vertically below the discharge port when the lid attached to the receiving port is in a position contacting the first contact portion. The sheet manufacturing apparatus according to claim 1 .

5. the waste tank has a grip portion, the gripping portion is provided at a position away from a position vertically below the discharge port when the side surface of the receiving port is in contact with the second contact portion; The sheet manufacturing apparatus according to claim 2 .

6. the waste liquid tank has a lid rest portion capable of supporting the lid, When the waste liquid tank is located inside the tank holding portion, the lid supported by the lid rest portion is located below the first contact portion and the second contact portion. The sheet manufacturing apparatus according to claim 2 .

7. Further provided is a tray on which the waste liquid tank is placed, The waste liquid tank is mounted on the tray and attached to the tank holder. The sheet manufacturing apparatus according to claim 1 .

8. The tray has a receiving portion capable of receiving the waste liquid. The sheet manufacturing apparatus according to claim 7 .

9. The tray is a tank detection unit that detects whether the waste liquid tank is placed on the tray; a weight detection unit that detects that a predetermined weight of the waste liquid has been received in the waste liquid tank; having The sheet manufacturing apparatus according to claim 7 .

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