Extraction device

Abstract

An extraction device (10) is provided with: a storage tank (11) for storing a solvent (MC); a plurality of transport rollers (20) disposed in the storage tank (11) and transporting the film (F); and a sheet feeding device (30) disposed in the storage tank (11) and used for winding the film (F) on the conveying roller (20). The sheet feeding device (30) is provided with: a plurality of sprockets (31) disposed on at least the wall surface (12) of the storage tank (11); a chain (40) wound around the plurality of sprockets (31) and connected to a rope (R) for winding the film (F) around the conveyance roller (20); and a tension adjustment unit (50) to which the adjustment sprocket (33) is attached, which supports the adjustment sprocket (33) so that the adjustment sprocket (33) can move in the direction in which the tension of the chain (40) is changed, and which has a spring (75) that applies a biasing force to the adjustment sprocket (33) in the direction in which the tension of the chain (40) is increased.

Description

Technical Field

[0001] This invention relates to an extraction device included in an extraction drying apparatus, and more particularly to an extraction device having a sheet introduction device for allowing a thin film to pass through. Background Technology

[0002] As a method for manufacturing porous films such as separators used in lithium-ion batteries, methods using plasticizers are known. For example, Patent Documents 1 and 2 describe methods in which a resin composition is mixed with a plasticizer, melted and kneaded at high temperature to form a sheet, stretched using a stretching machine, and the plasticizer is extracted using an extraction and drying device with a solvent, and the solvent is dried, thereby manufacturing a porous film.

[0003] Existing technical documents Patent documents Patent Document 1: Japanese Patent Application Publication No. 2005-239773 Patent Document 2: Japanese Patent Application Publication No. 2011-042805 Summary of the Invention

[0004] The problem that the invention aims to solve In the extraction apparatus of the extraction-drying device, when extracting plasticizers from a film obtained by molding a resin composition into a sheet and stretching it using a solvent, multiple conveyor rollers for winding the film are arranged in a solvent storage tank. The film is conveyed in the solvent using the conveyor rollers while the plasticizer is extracted using the solvent. In the extraction apparatus of the extraction-drying device, in order to convey the film using multiple conveyor rollers in this way, a sheet feeding device for winding the film onto the conveyor rollers is arranged in the solvent storage tank. The sheet feeding device has a chain for holding a rope for pulling the film and a sprocket for the conveyor chain. The chain is arranged on the side wall of the storage tank along the conveying path of the film conveyed by the conveyor rollers.

[0005] When winding the film onto the conveyor roller using the sheet feeding device, firstly, with one end of a rope hooked onto the chain, the chain is pulled along the conveyor path using the driving force of a motor or manually. This winds the rope onto the conveyor roller, arranging it along the film's conveyor path. After winding the rope onto the conveyor roller, one end of the rope is tied to the front end of the film, and the rope is pulled, pulling the film along the path where the rope is arranged, i.e., the film's conveyor path, arranging it along the film's conveyor path. Thus, the film is wound onto the conveyor roller located in the storage tank.

[0006] Here, the sprocket's rotation axis is supported by a bearing. Bearings typically use grease as a lubricant, but because a solvent is stored in the storage tank, the grease will flow into the solvent when the bearing is immersed in it. Therefore, in the sheet feeding device, the solvent itself is used for bearing lubrication, and the film is wound onto the conveyor roller by pulling the chain while the solvent is stored in the storage tank.

[0007] However, because solvents readily vaporize, the chain tends to shrink due to the heat of vaporization. When the chain shrinks, the tension of the chain wound around the sprocket increases, thus increasing the force with which the chain presses against the sprocket in a direction perpendicular to its axis of rotation. This increases the rotational resistance of the sprocket, making it difficult to turn the chain, or increases the load on the bearings supporting the sprocket's axis of rotation, making bearing failure more likely. Regarding chain tension adjustment, for example, the holes through which the bolts for mounting the sprocket's base pass can be elongated, allowing the position of the base to be adjusted. The tension can then be adjusted by adjusting the position of the sprocket along with the base.

[0008] However, the tension of the chain in the sheet feeding device changes due to the heat of vaporization accumulated in the storage tank, resulting in a relatively high frequency of tension changes. Therefore, in conventional extraction and drying devices, the chain tension must be adjusted by changing the position of the sprocket whenever the tension of the chain in the sheet feeding device that allows the film to pass through changes, making the chain tension adjustment rather cumbersome.

[0009] The present invention was made in view of the above circumstances, and its object is to provide an extraction device that allows for easy adjustment of the tension of the chain in the sheet feeding device.

[0010] Methods for solving problems To address the aforementioned issues and achieve the objective, the extraction apparatus of the present invention comprises: a storage tank for storing a liquid through which a film passes; a plurality of conveying rollers disposed in the storage tank and conveying the film; and a sheet feeding device disposed in the storage tank and used to wind the film onto the plurality of conveying rollers; the sheet feeding device comprises: sprockets, at least a plurality of which are disposed on the wall of the storage tank and have a portion disposed along a conveying path for conveying the film along the plurality of conveying rollers; a chain wound around the plurality of sprockets and connected to a rope for winding the film onto the plurality of conveying rollers; and a tension adjusting unit, on which a portion of the plurality of sprockets is mounted, supports the sprockets in such a way that the sprockets can move in a direction that changes the tension of the chain, and has a force-applying member that applies a force to the sprockets in a direction that increases the tension of the chain.

[0011] Invention Effects The extraction device of the present invention enables easy adjustment of the tension of the chain in the sheet feeding device. Attached Figure Description

[0012] Figure 1 This is a schematic diagram showing a portion of the apparatus structure of the extraction and drying apparatus according to the embodiment.

[0013] Figure 2 yes Figure 1 A detailed view of one of the multiple storage tanks shown.

[0014] Figure 3 yes Figure 2 The HH view.

[0015] Figure 4 yes Figure 2 A detailed view of the tension adjustment section is shown.

[0016] Figure 5 It means through Figure 4 A diagram illustrating the state of the sprocket in the tension adjustment section.

[0017] Figure 6 yes Figure 4 AA view.

[0018] Figure 7 yes Figure 4 BB view.

[0019] Figure 8 yes Figure 6 CC section view.

[0020] Figure 9 This is a detailed diagram of the configuration attachments in the chain.

[0021] Figure 10 yes Figure 9 DD view.

[0022] Figure 11 This is an explanatory diagram showing the state of the connection between the rope and the sheet material in the device.

[0023] Figure 12 This is an illustration of attaching a rope to a film and using the rope to wind the film onto a conveyor roller.

[0024] Figure 13 This is a front view of the tension adjustment section without a force-applying component.

[0025] Figure 14 yes Figure 13 EE view.

[0026] Figure 15This is a front view of the tension adjustment section of the extraction and drying apparatus of Embodiment 2.

[0027] Figure 16 yes Figure 15 The GG view.

[0028] Figure 17 This is a schematic diagram of the tension adjustment section of the extraction and drying apparatus of Embodiment 3. Detailed Implementation

[0029] Hereinafter, embodiments of the extraction apparatus of this disclosure will be described in detail with reference to the accompanying drawings. However, this is not intended to limit the invention through these embodiments. Furthermore, the constituent elements in the following embodiments include elements that can be substituted and readily conceived by those skilled in the art, or elements that are substantially the same.

[0030] [Implementation Method 1] Figure 1 This is a schematic diagram showing a portion of the structure of the extraction and drying apparatus 1 according to Embodiment 1. Figure 1 The main focus of the illustration is on the extraction device 10 included in the extraction and drying apparatus 1. Furthermore, in the following description, the vertical direction of the extraction and drying apparatus 1 in its normal operating state will be referred to as the vertical direction Z of the extraction and drying apparatus 1; the upper side of the extraction and drying apparatus 1 in its normal operating state will be referred to as the upper side of the extraction and drying apparatus 1; and the lower side of the extraction and drying apparatus 1 in its normal operating state will be referred to as the lower side of the extraction and drying apparatus 1. Additionally, the horizontal direction of the extraction and drying apparatus 1 in its normal operating state will also be referred to as the horizontal direction within the extraction and drying apparatus 1. Moreover, the direction in the horizontal direction in which the film F conveyed by the extraction and drying apparatus 1 travels will be defined as the length direction Y within the extraction and drying apparatus 1, and the direction in the horizontal direction orthogonal to the length direction Y will be defined as the width direction X within the extraction and drying apparatus 1.

[0031] <Extraction and Drying Apparatus 1> The extraction and drying apparatus 1 of Embodiment 1 is mainly used for manufacturing separator films used in lithium-ion batteries, and includes an extraction apparatus 10 and a drying apparatus (not shown). In the upstream process of the extraction and drying apparatus 1 during the manufacturing of the separator film, the resin material, which will become the raw material of the separator film, and the liquid plasticizer, which is a liquid plasticizer, are melt-blended and formed into a sheet to obtain a film F, which is a sheet-shaped film component. The extraction and drying apparatus 1 is an apparatus for removing the liquid plasticizer from the obtained film F.

[0032] Specifically, the resin material used as the raw material for the diaphragm film is, for example, a polyolefin resin such as polyethylene or polypropylene. Additionally, the liquid plasticizer is, for example, oil or liquid paraffin. In the upstream process of the extraction-drying apparatus 1 during diaphragm film manufacturing, these resin materials and the liquid plasticizer are melt-blended and then formed into sheets. These sheets are further stretched to produce a thin film F in the form of a polyolefin resin with numerous micropores and the liquid plasticizer incorporated within these micropores. The extraction-drying apparatus 1 is configured to extract and remove the liquid plasticizer impregnated in the film F, thereby causing the liquid plasticizer to detach from the numerous micropores in the polyolefin resin, resulting in a film F with numerous micropores.

[0033] The extraction drying apparatus 10 of the extraction drying apparatus 1 uses solvent MC to extract liquid plasticizer from the film F conveyed to the extraction drying apparatus 1. Therefore, the extraction apparatus 10 has a tank, namely a storage tank 11, for storing the liquid solvent MC. For example, dichloromethane is used as the solvent MC. A plurality of conveying rollers 20 are arranged in the storage tank 11. In the extraction apparatus 10, the film F is conveyed while being wound around the conveying rollers 20 in the storage tank 11 and immersed in the solvent MC in the storage tank 11, thereby extracting the liquid plasticizer and removing the liquid plasticizer from the film F. The storage tank 11 is a tank for storing the liquid through which the film F passes.

[0034] Furthermore, the extraction device 10 has a plurality of storage tanks 11. The plurality of storage tanks 11 are arranged in the longitudinal direction Y along the conveying direction of the film F. Regarding the plurality of storage tanks 11, adjacent storage tanks 11 are separated from each other near the lower end of the extraction device 10 in the vertical direction Z, and adjacent storage tanks 11 are connected to each other via a wall surface 14 integrally formed with the storage tank 11 near the upper end of the extraction device 10 in the vertical direction Z. Alternatively, the plurality of storage tanks 11 of the extraction device 10 may be such that adjacent storage tanks 11 are connected to each other via pipes near the upper end of the extraction device 10 in the vertical direction Z. In Embodiment 1, each storage tank 11 has two storage sections for storing solvent MC, and the two storage sections of one storage tank 11 are arranged in the longitudinal direction Y. The wall surface 14 integrally formed with the storage tank 11 is located on the upper side of the storage tank 11 in the vertical direction Z, and is continuously formed from the wall surfaces 12 on both sides of the storage tank 11 in the width direction X.

[0035] In other words, in the extraction device 10, adjacent storage tanks 11 in the longitudinal direction Y are connected to each other by a wall 14 located on the upper side of the storage tank 11, and each storage tank 11 is open to each other at its upper side in the vertical direction Z relative to the adjacent storage tanks 11 in the longitudinal direction Y. Therefore, regarding the plurality of storage tanks 11 in the extraction device 10, the inner spaces of adjacent storage tanks 11 in the longitudinal direction Y are interconnected. Thus, in the extraction device 10, adjacent storage tanks 11 are separated from each other in the longitudinal direction Y, and adjacent storage tanks 11 are connected to each other by a wall 14 disposed on the upper side of the storage tank 11. Therefore, the plurality of storage tanks 11 in the extraction device 10 are integrally provided.

[0036] In embodiment 1, the extraction device 10 has three storage tanks 11 arranged in the length direction Y. The number of storage tanks 11 in the extraction device 10 may be two or less, or four or more.

[0037] The drying device (not shown) of the extraction drying apparatus 1 is disposed downstream of the extraction apparatus 10 in the conveying direction of the film F, and is connected to the downstreammost storage tank 11 among the plurality of storage tanks 11 of the extraction apparatus 10 in the conveying direction of the film F. The drying device connected to the plurality of storage tanks 11 of the extraction apparatus 10 dries the solvent MC adhering to the film F in the extraction apparatus 10. That is, by drying the film F, the drying device removes the solvent MC adhering to the film F in the extraction apparatus 10 from the film F.

[0038] The drying apparatus includes, for example, a temperature-regulating roller (not shown) that raises the temperature of the film F while conveying the film F, and an air nozzle (not shown) that removes the solvent MC adhering to the film F by blowing gas onto the film F. In the drying apparatus, the film F is conveyed within the drying apparatus while the solvent MC is removed from the film F. The film F, after the solvent MC has been removed by the drying apparatus, is conveyed outside the drying apparatus, and thus conveyed to a process downstream of the extraction drying apparatus 1.

[0039] Figure 2 yes Figure 1 A detailed view of one of the plurality of storage tanks 11 shown. Each storage tank 11 is equipped with a plurality of conveying rollers 20, each formed in a cylindrical shape, with both ends of the conveying rollers 20 rotatably supported in the axial direction. Specifically, each storage tank 11 has a plurality of conveying rollers 20 disposed within the storage tank 11 and a conveying roller 20 disposed on the upper side of the storage tank 11. The conveying rollers 20 disposed on the upper side of the storage tank 11 are rotatably supported on two side walls 14 located on the upper side of the storage tank 11 in the width direction X.

[0040] Figure 3 yes Figure 2 The HH view shows the conveyor rollers 20 arranged within the storage tank 11, corresponding to each storage section of the storage tank 11. Therefore, in Embodiment 1, two conveyor rollers 20 are arranged within the storage tank 11, corresponding to each storage section of the storage tank 11. Each conveyor roller 20 arranged within the storage tank 11 is supported by a conveyor roller support member 21. The conveyor roller support member 21 is disposed within the storage tank 11 on the bottom surface 13 of the storage tank 11. The conveyor roller support member 21 is provided for each conveyor roller 20 arranged within the storage tank 11 and is disposed near both ends of the conveyor roller 20, corresponding to the length of the conveyor roller 20. The conveyor roller 20 arranged within the storage tank 11 is rotatably supported by the conveyor roller support member 21 disposed on the bottom surface 13 of the storage tank 11.

[0041] Each storage tank 11 is provided with a plurality of conveying rollers 20, which are rotatably supported by a wall 14 positioned on the upper side of the storage tank 11 or by a conveying roller support member 21 disposed within the storage tank 11. Furthermore, these plurality of conveying rollers 20 can rotate about the axis of a cylinder by power supplied from a power source such as a motor. Therefore, by rotating the conveying rollers 20 while the film F is wound around them, the film F can be conveyed. The conveying rollers 20 are arranged along a conveying path 25 when the film F is conveyed using the extraction device 10, and the film F is conveyed along the conveying path 25 by being wound around the plurality of conveying rollers 20 within the storage tank 11. In other words, the conveying path 25 of the film F is formed by arranging a plurality of conveying rollers 20 for each storage tank 11.

[0042] Of the plurality of conveying rollers 20 arranged in each storage tank 11, the conveying roller 20 supported by the conveying roller support member 21 is positioned below the liquid surface of the solvent MC in the storage tank 11, that is, disposed within the solvent MC. Thus, the conveying path 25 of the film F is also formed in the portion of the storage solvent MC within the storage tank 11, and the film F conveyed by the conveying roller 20 is conveyed while passing through the solvent MC stored in the storage tank 11.

[0043] The storage tank 11 is also equipped with a sheet feeding device 30 for winding the film F onto a plurality of conveyor rollers 20. The sheet feeding device 30 is disposed in each storage tank 11 of the extraction device 10. The sheet feeding device 30 is used to feed the rope R (refer to...) Figure 11 The sheet feeding device 30 has a rope R wound around a plurality of conveyor rollers 20 for feeding the film F onto the rollers 20. The sheet feeding device 30 has a plurality of sprockets 31 and a chain 40 wound around the sprockets 31. The chain 40 used in the sheet feeding device 30 is a so-called roller chain, and the sprockets 31 are sprockets for roller chains.

[0044] Of the multiple sprockets 31, one sprocket 31 is driven by a drive motor 35 (see reference 35) which serves as the power source. Figure 12 The drive sprocket 34 rotates under the driving force of the drive sprocket 34. In addition, among the multiple sprockets 31, the other sprockets 31 are driven sprockets 32. The chain 40 wound around the multiple sprockets 31 moves by the rotation of the drive sprocket 34, and the driven sprocket 32 ​​rotates along with the moving chain 40.

[0045] Multiple sprockets 31 are disposed at least on the wall surface 12 at the end of the storage tank 11 in the width direction X. In Embodiment 1, multiple sprockets 31 are disposed on the wall surface 12 of the storage tank 11 and on the wall surface 14 disposed on the upper side of the storage tank 11. That is, multiple sprockets 31 are respectively disposed on one of the two wall surfaces 14 on the upper side of the storage tank 11 that support the conveying roller 20 and are located on both sides in the width direction X, and on the wall surface 12 of the storage tank 11 that is continuous from the wall surface 14. Thus, when viewed along the width direction X, the multiple sprockets 31 disposed on the wall surface 12 of the storage tank 11 and the wall surface 14 integrally formed with the storage tank 11 are configured to have a portion disposed along the conveying path 25 for conveying the film F along the multiple conveying rollers 20.

[0046] In detail, a portion of the plurality of sprockets 31, when viewed along the width direction X, are arranged near the transport path 25 through which the film F is transported by the plurality of transport rollers 20, and are arranged approximately along the transport path 25 of the film F. Additionally, the other plurality of sprockets 31 are arranged at a position above the transport path 25 of the film F.

[0047] The chain 40 wound around the plurality of sprockets 31 in this configuration is wound in a manner that loops around the plurality of sprockets 31. Therefore, when viewed along the width direction X, the portion of the chain 40 wound around the plurality of sprockets 31 that is configured along the transport path 25 of the film F is configured approximately along the transport path 25. In addition, in the portion of the plurality of sprockets 31 that is configured above the transport path 25 of the film F, the chain 40 is configured throughout the entire range upstream and downstream of the transport path 25 of the film F in the storage tank 11.

[0048] Therefore, when the drive sprocket 34 rotates, the chain 40 wound around the plurality of sprockets 31 can circulate by moving along the conveying path 25 of the film F while moving between the upstream and downstream sides of the conveying path 25. Furthermore, the chain 40 circulates in the following direction: in the portion along the conveying path 25 of the film F, it moves from the upstream side to the downstream side in the conveying direction of the film F; in the portion located above the conveying path 25, it moves from the downstream side to the upstream side in the conveying direction of the film F.

[0049] Furthermore, in Embodiment 1, among the plurality of sprockets 31 of a sheet feeding device 30, a portion of the sprockets 31 are positioned along the longitudinal direction Y within a range along the longitudinal direction Y of the storage tank 11 adjacent to the downstream side of the storage tank 11 where the sheet feeding device 30 is located. Specifically, among the plurality of sprockets 31 of the sheet feeding device 30, a portion of the sprockets 31 located above the conveying path 25 of the film F are positioned on the upper wall 14 of the storage tank 11 adjacent to the downstream side of the storage tank 11 where the sheet feeding device 30 is located. Since the conveying path 25 of the film F is also formed across the storage tanks 11 adjacent to each other along the longitudinal direction Y, by positioning a portion of the sprockets 31 of a sheet feeding device 30 within a range along the longitudinal direction Y of adjacent storage tanks 11, the chain 40 wound around the sprockets 31 is also positioned near the conveying path 25 located between the storage tanks 11.

[0050] The sheet feeding device 30 also has a tension adjusting section 50 for adjusting the tension of the chain 40. A portion of a plurality of sprockets 31 are mounted in the tension adjusting section 50, and the tension adjusting section 50 adjusts the tension of the chain 40 by applying a force to the sprockets 31 mounted in the tension adjusting section 50 in a direction that increases the tension of the chain 40.

[0051] The tension adjustment unit 50 is disposed on the wall surface 12 of the storage tank 11 or on the wall surface 14 integrally formed with the storage tank 11, similar to the sprocket 31. In Embodiment 1, the tension adjustment unit 50 is disposed on the wall surface 14 integrally formed with the storage tank 11, near the upper surface 15 of the extraction device 10, located above the storage tank 11. Therefore, the tension adjustment unit 50 is disposed above the liquid level of the solvent MC stored in the storage tank 11.

[0052] Furthermore, the tension adjustment section 50 disposed on the upper wall 14 of the storage tank 11 is positioned upstream in the conveying direction of the film F. Additionally, on the upper wall 14 of the storage tank 11, a portion of the sprockets 31 of the sheet feeding device 30 of the storage tank 11 disposed on the upstream side of the storage tank 11 are positioned upstream in the conveying direction of the film F. Therefore, the tension adjustment section 50 is positioned near a portion of the sprockets 31 of the sheet feeding device 30 of the storage tank 11 disposed on the upstream side.

[0053] Furthermore, an operation port opening / closing door 16 is disposed on the upper surface 15 of the extraction device 10, near the tension adjustment section 50 disposed on the wall surface 14. An operation port (hatch) shaped like a hole extending through the upper surface 15 in the vertical direction Z is formed near the tension adjustment section 50 on the upper surface 15. The operation port opening / closing door 16 is the door for opening and closing the operation port. A portion of the sprockets 31 of the sheet feeding device 30 disposed on the upstream side of the storage tank 11 are disposed near the tension adjustment section 50; therefore, the operation port opening / closing door 16 is disposed to cover the area between the sprockets 31 and the tension adjustment section 50 in the longitudinal direction Y. Figure 1 In the diagram, the central storage tank 11 among the three storage tanks 11 is shown with the operating port and door 16 open, while the left and right storage tanks 11 are shown with the operating ports and doors 16 closed.

[0054] Figure 4 yes Figure 2 A detailed view of the tension adjustment section 50 shown. Figure 5 It means through Figure 4 Explanation diagram of the state of the sprocket 31 of the tension adjustment section 50 shown. Figure 6 yes Figure 4 AA view. Figure 7 yes Figure 4 View from angle BB. The tension adjustment unit 50 includes a base plate 51, a guide 53, a sliding base 60, and a tension adjustment unit 70. The base plate 51 is the component in the tension adjustment unit 50 that serves as the base. The tension adjustment unit 50 is disposed on the upper wall 14 of the storage tank 11 by mounting the base plate 51 to the upper wall 14 of the storage tank 11. The base plate 51 is formed into a generally rectangular plate shape and is mounted to the upper wall 14 of the storage tank 11 by a plurality of mounting bolts 52. Thus, the tension adjustment unit 50 is disposed on the upper wall 14 of the storage tank 11.

[0055] The guide member 53 is a component used to limit the direction of movement of the sliding base 60 on the base plate 51 and to guide the movement of the sliding base 60. Specifically, the sliding base 60 is a component disposed on the base plate 51 overlapping with it, and the guide member 53 is mounted to the base plate 51 by mounting bolts 54 at both ends of the sliding base 60 in the longitudinal direction Y. Thus, the guide member 53 can limit the movement of the sliding base 60 in the longitudinal direction Y.

[0056] Furthermore, guide members 53 are formed on both sides of the sliding base 60 along the longitudinal direction Y, respectively, extending along the vertical direction Z. Thus, the guide members 53 can guide the sliding base 60 when it moves along the vertical direction Z.

[0057] Elongated holes 61 extending in the vertical direction Z are formed near both ends of the sliding base 60 along its length Y direction. Mounting bolts 62 for fixing the sliding base 60 to the base plate 51 are inserted into the elongated holes 61. Therefore, when the mounting bolts 62 are loosened, the sliding base 60 can move relative to the mounting bolts 62 in the vertical direction Z along the extension direction of the elongated holes 61; when the mounting bolts 62 are tightened, the sliding base 60 can be fixed to the base plate 51 using the mounting bolts 62. Thus, by loosening the mounting bolts 62, the sliding base 60 can move in the vertical direction Z while being guided by the guide member 53; by tightening the mounting bolts 62, the current position of the sliding base 60 in the vertical direction Z can be fixed to the base plate 51.

[0058] An adjusting bolt 55 is connected to a sliding base 60 that can move relative to the base plate 51 in the vertical direction Z. The adjusting bolt 55 is configured such that it cannot move relative to the base plate 51 in the vertical direction Z, but is connected to the sliding base 60 in such a way that it can move relative to the sliding base 60 in the vertical direction Z by rotating the adjusting bolt 55. Therefore, regarding the sliding base 60, by rotating the adjusting bolt 55 while the mounting bolt 62 is loose, the sliding base 60 can be moved in the vertical direction Z, and by tightening the mounting bolt 62 at any position, the position of the sliding base 60 in the vertical direction Z can be adjusted.

[0059] The tension adjustment unit 70 includes a bracket 71, a sliding shaft 73, a spring 75, and a sliding component 80, and is mounted on a sliding base 60. The bracket 71, when viewed along its length Y direction, is roughly U-shaped. The bracket 71 is mounted to the sliding base 60 with the open side of the U-shape opposite to the side where the sliding base 60 is located, and the closed side of the U-shape opposite to the side where the sliding base 60 is located, via mounting bolts 72. Therefore, the bracket 71 is configured such that the upper and lower ends of the U-shape are respectively located on the upper and lower ends in the vertical direction Z, and the bracket 71 protrudes from the side where the sliding base 60 is located towards the opposite side along the width direction X. The tension adjustment unit 70 is mounted to the sliding base 60 by mounting the bracket 71 to the sliding base 60.

[0060] On the sliding base 60, guide members 63 are respectively arranged on both sides of the mounting bracket 71 in the longitudinal direction Y. The guide member 63 has a bolt that engages with a threaded hole (not shown) formed in the sliding base 60 and a tube member for the threaded portion of the bolt to enter the inside. With the threaded portion of the bolt inside the tube member, the bolt is screwed into the threaded hole of the sliding base 60, thereby mounting the guide member 63 to the sliding base 60. The bracket 71 of the tension adjustment unit 70 is mounted on the sliding base 60 by entering between the guide members 63 mounted on the sliding base 60, thereby aligning them in the longitudinal direction Y.

[0061] The sliding shaft 73 is arranged in a direction extending in the vertical direction Z, and is positioned between portions of the bracket 71 located at the upper and lower ends in the vertical direction Z and protruding in the width direction X. The sliding shaft 73 is mounted to the bracket 71 in a direction extending in the vertical direction Z by fixing the lower portion to the bracket 71 with a nut 74. Two such sliding shafts 73 are arranged on the bracket 71, and the two sliding shafts 73 are arranged in a direction separating in the length direction Y and extending in the vertical direction Z respectively.

[0062] The sliding member 80 is configured to move freely relative to the sliding shaft 73 disposed on the bracket 71 along the extending direction of the sliding shaft 73. Specifically, a through hole (not shown) extending in the vertical direction Z and through which the sliding shaft 73 passes is formed on the sliding member 80, and the sliding member 80 is configured such that the sliding shaft 73 passes through the through hole. Therefore, the sliding member 80 is freely movable relative to the sliding shaft 73 along the extending direction of the sliding shaft 73; that is, the sliding member 80 is configured to move freely relative to the bracket 71 on which the sliding shaft 73 is mounted in the vertical direction Z along the sliding shaft 73.

[0063] Spring 75 is a helical compression spring, positioned on the lower side of the sliding shaft 73 in the vertical direction Z, further down than the portion where the sliding member 80 is located. Spring 75 is provided on both sliding shafts 73. Spring 75 is positioned on the outer side of the sliding shaft 73, that is, the sliding shaft 73 passes through the inner side of the helical spring 75. The upper end of the spring 75, as a compression spring, abuts against the sliding member 80 in the vertical direction Z, and the lower end in the vertical direction Z abuts against the portion of the bracket 71 that protrudes in the width direction X from the side where the sliding base 60 is located.

[0064] Therefore, the spring 75 applies a force to the portion protruding along the width direction X at the lower end of the bracket 71 and to the sliding member 80, causing them to separate along the vertical direction Z. In other words, the spring 75 applies a force to the sliding member 80 from below in the upward direction of the vertical direction Z. The spring 75 is provided as a force-applying component that applies a force to the sliding member 80 in this way.

[0065] A sprocket support member 81, which rotatably supports the sprocket 31, is mounted on the sliding member 80. One of the multiple sprockets 31 of the sheet feeding device 30 is rotatably mounted on the sprocket support member 81. Therefore, the sprocket 31 is rotatably mounted on the sliding member 80 via the sprocket support member 81. The sprocket 31 mounted on the sliding member 80 via the sprocket support member 81 is a driven sprocket 32 ​​that rotates with the movement of the chain 40, which moves along with the rotation of the drive sprocket 34. Furthermore, the sprocket 31 mounted on the sliding member 80 via the sprocket support member 81 is also configured as an adjustment sprocket 33. When the sliding member 80 moves along the sliding shaft 73, the sprocket 31 also moves integrally with the sprocket support member 81 and the sliding member 80, thereby allowing the adjustment sprocket 33 to adjust the tension of the chain 40.

[0066] The sprocket support member 81 is disposed on the end side opposite to the side where the bracket 71 and the sliding base 60 are located in the width direction X, relative to the sliding member 80. Additionally, the adjusting sprocket 33 is disposed on the end side opposite to the side where the sliding member 80 is located in the width direction X, relative to the sprocket support member 81. The adjusting sprocket 33 is mounted on the sprocket support member 81 with its rotation axis aligned along the width direction X.

[0067] Figure 8 yes Figure 6 The CC cross-sectional view shows the adjusting sprocket 33 mounted to the sprocket support member 81 via the bearing 82. The bearing 82 is a so-called rolling bearing. The sprocket support member 81 enters the inner side of the inner ring of the bearing 82, and the inner ring of the bearing 82 is clamped from both sides axially by the sliding member 80 and the inner ring pressing member 85. The inner ring pressing member 85 is mounted to the sprocket support member 81 by mounting bolts 86 while clamping the inner ring of the bearing 82.

[0068] Furthermore, with the outer ring of the bearing 82 inside the adjusting sprocket 33, the adjusting sprocket 33 and the outer ring pressing member 83 clamp the outer ring of the bearing 82 from both sides axially. The outer ring pressing member 83 is mounted to the adjusting sprocket 33 via mounting bolts 84 while clamping the outer ring of the bearing 82. The adjusting sprocket 33 is thus mounted to the sprocket support member 81 via the bearing 82, thereby allowing the adjusting sprocket 33 to rotate relative to the sprocket support member 81 about the axis of the bearing 82.

[0069] Furthermore, the other driven sprockets 32 in the sheet feeding device 30 are also mounted on the support members that support the driven sprockets 32 via bearings 82, just like the adjusting sprockets 33. Thus, each driven sprocket 32 ​​in the sheet feeding device 30 is rotatably arranged.

[0070] An adjusting sprocket 33 is mounted on a sprocket support member 81 of the tension adjusting unit 70 via a bearing 82. The sprocket support member 81 is mounted on a sliding member 80, thereby allowing the adjusting sprocket 33 to be rotatably mounted on the sliding member 80 axially along the width direction X. That is, the sliding member 80 supports the adjusting sprocket 33 axially along the width direction X via the sprocket support member 81. A sliding shaft 73 extending through the sliding member 80 extends in the vertical direction Z, thus extending in a direction orthogonal to the axial direction of the adjusting sprocket 33, which is rotatably supported by the sliding member 80. Therefore, the adjusting sprocket 33, supported on the sliding member 80 via the sprocket support member 81, moves relative to the sliding shaft 73 in the vertical direction Z, thereby moving together with the sprocket support member 81 and the sliding member 80 in the vertical direction Z, which is orthogonal to the axial direction of the adjusting sprocket 33.

[0071] like Figure 5 As shown, the chain 40 is wound around the adjusting sprocket 33, which is supported by the sliding member 80. Therefore, when the sliding member 80 moves along the sliding shaft 73 in the vertical direction Z, the adjusting sprocket 33 around the chain 40 also moves in the vertical direction Z, thereby changing the tension of the chain 40. The sliding member 80 of the tension adjusting unit 70 supports the adjusting sprocket 33 in a manner that allows it to move in the direction that changes the tension of the chain 40.

[0072] On the other hand, the spring 75, as a force-applying component, applies a force from the lower side to the upper side to the sliding member 80 supporting the adjusting sprocket 33 along the sliding shaft 73. The chain 40 is wound around the upper side of the adjusting sprocket 33, so when the sliding member 80 moves upward due to the force from the spring 75, the movement of the adjusting sprocket 33, which moves upward together with the sliding member 80, acts on the chain 40 as an action to tension the chain 40.

[0073] In other words, when the adjusting sprocket 33, supported by the sprocket support member 81 and on the sliding member 80, moves upward together with the sliding member 80, the tension of the chain 40 wound around the upper side of the adjusting sprocket 33 increases. Therefore, in other words, the spring 75, as a force-applying member, applies a force to the sliding member 80 supporting the adjusting sprocket 33 in the direction of the extension of the sliding shaft 73, and in a direction that increases the tension of the chain 40 wound around the adjusting sprocket 33. By applying a force to the sliding member 80 in this way, the spring 75, through the sliding member 80, applies a force to the adjusting sprocket 33 in a direction that increases the tension of the chain 40.

[0074] Thus, the spring 75 that applies a force to the adjusting sprocket 33 in the direction of increasing the tension of the chain 40 is preferably a spring whose spring constant is appropriately set according to the downward force acting from the chain 40 on the adjusting sprocket 33 due to the tension of the chain 40.

[0075] Figure 9 This is a detailed diagram of the configuration attachment 41 in chain 40. Figure 10 yes Figure 9 DD view. The chain 40 of the sheet feeding device 30 can be connected to the rope R (see reference) for winding the film F onto the multiple conveyor rollers 20. Figure 11 Therefore, on the chain 40, which is a roller chain, an attachment 41 for connecting the rope R is installed on a portion of the chain links. The attachment 41 is disposed on one side in the width direction of the chain 40. The attachment 41 has a plate-shaped component protruding in the width direction of the chain 40, and a hole 42 is formed in the plate-shaped component that extends in the thickness direction of the plate.

[0076] The rope R is connected to the chain 40 by providing a connector (not shown) at the end of the rope R that engages with the hole 42 of the attachment 41 and engaging the connector with the attachment 41, or by passing the rope R through the hole 42 of the attachment 41 and attaching it to the attachment 41.

[0077] <Function of Extraction and Drying Device 1> The extraction and drying apparatus 1 of Embodiment 1 includes the structure described above, and its operation will be explained below. The extraction and drying apparatus 1 performs extraction and drying of the thin film F in the manufacturing process of porous thin films F, such as separator films used in lithium-ion batteries. When using the extraction and drying apparatus 1 to extract and dry the thin film F, before starting the extraction and drying apparatus 1, the thin film F is first wound onto each of the rollers, such as the conveying roller 20, provided in the extraction and drying apparatus 1, so that the thin film F can be conveyed using these rollers. Therefore, by rotating each roller, the thin film F can be continuously conveyed.

[0078] With the film F configured in this way, the extraction and drying apparatus 1 is started to operate, thereby conveying the film F, which was formed in the upstream process in the conveying direction of the film F, to the extraction and drying apparatus 1. The film F has a large number of micropores in the polyolefin resin and liquid plasticizer enters the micropores. The film F is first conveyed to the extraction device 10 of the extraction and drying apparatus 1. In the extraction device 10, while conveying the film F by the conveying roller 20 arranged in the storage tank 11, the film F is immersed in the solvent MC stored in the storage tank 11, thereby removing the liquid plasticizer from the film F.

[0079] After the liquid plasticizer is removed, the film F is conveyed from the extraction device 10 to the drying device (not shown). In the drying device, the film F is dried while being conveyed, and the solvent MC adhering to the film F is removed from the film F. The film F, which has had the liquid plasticizer extracted with solvent MC in the extraction device 10 and dried with solvent MC in the drying device, is sent out of the drying device and conveyed to the downstream side of the extraction-drying device 1.

[0080] In the extraction and drying apparatus 1, since the film F is conveyed by rollers such as the conveying roller 20, the film F is wound onto each roller during the extraction and drying of the film F using the extraction and drying apparatus 1, and multiple rollers are arranged in the extraction and drying apparatus 1. Regarding the multiple rollers arranged in the extraction and drying apparatus 1, in order to ensure the conveying path 25 of the film F during the extraction and drying of the film F using the extraction and drying apparatus 1, the rollers are arranged separately from each other. Therefore, it is difficult to wind the film F onto multiple rollers.

[0081] For example, the multiple conveyor rollers 20 arranged in the extraction device 10 are separated in the vertical direction Z to ensure the conveying path 25 of the film F across the multiple storage tanks 11, forming a conveying path 25 that travels back and forth in the vertical direction Z. Therefore, it is difficult to wind the film F onto the multiple conveyor rollers 20 in the extraction device 10. Therefore, in the extraction device 10, each storage tank 11 is provided with a sheet feeding device 30 for winding the film F onto the multiple conveyor rollers 20. When winding the film F onto the multiple conveyor rollers 20 arranged in the extraction device 10, the sheet feeding device 30 is used for winding.

[0082] Figure 11This is an explanatory diagram showing the connection between the rope R and the chain 40 of the sheet feeding device 30. When the film F is wound onto the conveyor roller 20 using the sheet feeding device 30, after the rope R is wound onto the conveyor roller 20 using the sheet feeding device 30, the film F is wound onto the conveyor roller 20 using the rope R already wound on the conveyor roller 20. When the rope R is wound onto the conveyor roller 20 using the sheet feeding device 30, firstly, the rope R is connected to the attachment 41 disposed on the chain 40. The rope R enters the storage tank 11 from the upstream side in the conveying direction of the film F relative to the storage tank 11, and the end of the rope R that has entered the storage tank 11, i.e., the end of the rope R located downstream in the conveying direction of the film F, is connected to the attachment 41 of the chain 40. For rope R, rope R is connected to attachment 41 by using a connector (not shown) for connecting rope R to attachment 41, or by passing rope R through the hole 42 formed in attachment 41 and tying rope R to attachment 41.

[0083] With the rope R connected to the attachment 41 of the chain 40, the sheet feeding device 30 drives the chain 40 to rotate by the drive motor 35. That is, by driving the drive motor 35, the drive sprocket 34 is rotated, and the rotation of the drive sprocket 34 is transmitted from the drive sprocket 34 to the chain 40, thereby causing the chain 40 to rotate along the plurality of sprockets 31 wound around the chain 40.

[0084] Here, the plurality of sprockets 31 have portions arranged along the transport path 25 of the film F when the extraction device 10 is observed in the width direction X. Therefore, when the extraction device 10 is observed in the width direction X, the chain 40 wound around the plurality of sprockets 31 also has portions arranged along the transport path 25 of the film F. When the chain 40 is wound by driving the drive motor 35, the winding direction of the chain 40 is such that the portions of the chain 40 arranged along the transport path 25 of the film F are wound in the direction along the transport direction of the film F.

[0085] As the chain 40 is wound, the attachment 41 disposed on the chain 40 also moves along the winding chain 40. Therefore, with regard to the rope R connected to the attachment 41, the portion connected to the attachment 41 also moves along the chain 40 wound around the plurality of sprockets 31. At this time, with the rope R connected to the attachment 41, the chain 40 is wound within the range that the attachment 41 moves from the upstream side to the downstream side in the conveying direction of the film F along the conveying path 25 of the film F.

[0086] The rope R, connected to the attachment 41 of the chain 40, enters the extraction device 10 from the upstream side of the film F in the conveying direction relative to the extraction device 10. Therefore, as the attachment 41 moves downstream along the conveying path 25 of the film F with the chain 40 surrounding it, the downstream end of the rope R in the conveying direction of the film F moves downstream together with the attachment 41 from the upstream side of the film F in the conveying direction. Thus, the rope R, entering the extraction device 10 from the upstream side of the film F in the conveying direction, is gradually pulled into the extraction device 10 while being pulled by the attachment 41, which moves with the chain 40 surrounding it.

[0087] At this time, since the attachment 41 moves along the conveying path 25 of the film F when viewed in the width direction X, the end of the rope R connected to the attachment 41 also moves along the conveying path 25 of the film F. Since the conveying path 25 of the film F is formed by arranging a plurality of conveying rollers 20 within the extraction device 10, as the end of the rope R connected to the attachment 41 moves along the conveying path 25 of the film F, the rope R moves between the plurality of conveying rollers 20. Thus, the rope R, moving from the upstream side to the downstream side in the conveying direction of the film F together with the attachment 41, moves while being wound around the conveying rollers 20, accompanied by the winding of the chain 40.

[0088] Thus, a sheet feeding device 30 capable of winding the rope R onto the conveyor roller 20 is provided for each storage tank 11, and the extraction device 10 has multiple storage tanks 11. When the rope R is wound onto the conveyor roller 20 disposed in the storage tank 11 using the sheet feeding device 30, the winding is performed sequentially starting from the conveyor roller 20 disposed in the storage tank 11 located upstream in the conveying direction of the film F.

[0089] When winding the rope R into the conveyor roller 20 in the storage tank 11 located at the upstream side in the conveying direction of the film F, the sheet feeding device 30 located in the storage tank 11 is used to wind it in the manner described above. Thus, in the storage tank 11 located at the upstream side, the rope R is wound onto the conveyor roller 20 from the upstream side to the downstream side in the conveying direction of the film F.

[0090] By winding a rope R around the chain 40 surrounding the sheet feeding device 30, a rope R is wound onto all the conveying rollers 20 within the longitudinal direction Y of the storage tank 11 on which the sheet feeding device 30 is disposed. After the attachment 41 connecting the rope R reaches the vicinity of the portion of the storage tank 11 that communicates with the storage tank 11 on its downstream side, the rope R is transferred to the sheet feeding device 30 on the downstream side of the storage tank 11. In detail, in Embodiment 1, among the plurality of sprockets 31 of a sheet feeding device 30, a portion of the sprockets 31 located above the conveying path 25 of the film F are disposed within the longitudinal direction Y of the storage tank 11 adjacent to the downstream side of the storage tank 11 on which the sheet feeding device 30 is disposed.

[0091] Therefore, when the attachment 41 with the rope R connected enters the range along the length Y of the adjacent storage tank 11 on the downstream side by winding the chain 40, the drive motor 35 is stopped, and the chain 40 stops winding, and the rope R connected to the attachment 41 is removed from the attachment 41. The rope R removed from the attachment 41 is then connected to the attachment 41 of the chain 40 of the sheet feeding device 30 located in the downstream storage tank 11. Thus, the rope R connected to the attachment 41 of the chain 40 of the sheet feeding device 30 located in the upstream storage tank 11 is transferred to the attachment 41 of the chain 40 of the sheet feeding device 30 located in the downstream storage tank 11.

[0092] The rope R is replaced through an operating port formed on the upper surface 15 of the extraction device 10. An operating port opening / closing door 16 is provided at the operating port; the rope R is replaced from outside the extraction device 10 by opening the operating port opening / closing door 16. The operating port opening / closing door 16 covers the area between the vicinity of the tension adjustment section 50 in the upper surface 15 of the extraction device 10 and the vicinity of a portion of the sprockets 31 of the plurality of sprockets 31 of the sheet feeding device 30 located in the upstream storage tank 11.

[0093] Therefore, by opening the operating port opening / closing door 16, both the chain 40 of the sheet feeding device 30 of the storage tank 11 located on one side of the operating port opening / closing door 16 and the chain 40 of the sheet feeding device 30 of the storage tank 11 located upstream can be accessed from the outside. Thus, when changing the rope R, the operator opens the operating port opening / closing door 16 and manually replaces the rope R located in the extraction device 10 with the accessory 41 of the chain 40 of the sheet feeding device 30 of the storage tank 11 located upstream, and then replaces it with the accessory 41 of the chain 40 of the sheet feeding device 30 of the storage tank 11 located downstream.

[0094] In the sheet feeding device 30 located downstream of the storage tank 11 where the attachment 41 of the chain 40 has been replaced with the rope R, the chain 40 is wound around the conveyor rollers 20 arranged within the length direction Y of the storage tank 11 in the same manner as the sheet feeding device 30 located upstream of the storage tank 11. Thus, in the storage tank 11 where the attachment 41 of the chain 40 of the sheet feeding device 30 has been replaced with the rope R, the rope R is wound around the conveyor rollers 20 from the upstream to the downstream side in the conveying direction of the film F, and the rope R is wound around all the conveyor rollers 20 within the length direction Y of the storage tank 11.

[0095] After the attachment 41 of the chain 40 connecting the rope R enters the range in the length direction Y of the storage tank 11 adjacent to the downstream side by wrapping the chain 40, the drive motor 35 is stopped, and the rope R connected to the attachment 41 is transferred to the attachment 41 of the chain 40 of the sheet feeding device 30 located in the storage tank 11 on the downstream side.

[0096] By repeating these operations, the rope R is wound around each of the multiple conveyor rollers 20 respectively disposed in the multiple storage tanks 11 of the extraction device 10. That is, in the extraction drying apparatus 1, when the film F is wound around the multiple conveyor rollers 20 of the extraction device 10, firstly, using the sheet feeding device 30 respectively disposed in the multiple storage tanks 11 of the extraction device 10, the rope R is wound around all the conveyor rollers 20 of the extraction device 10.

[0097] Figure 12 This diagram illustrates the process of attaching rope R to film F and winding film F around conveyor roller 20 using rope R. After winding rope R around conveyor roller 20 of extraction device 10, film F is wound around conveyor roller 20 using rope R wound on conveyor roller 20. Specifically, the upstream end of rope R wound on conveyor roller 20 in the conveying direction of film F is connected to the downstream end of film F. Regarding the connection of rope R to film F, for example, the connection is made by tying rope R near the center of film F in the width direction X and attaching rope R to film F. In addition, the downstream end of rope R in the conveying direction of film F is removed from attachment 41 of chain 40 of sheet feeding device 30. In this state, the operator performing the operation of winding film F around conveyor roller 20 pulls film F by pulling rope R from the downstream end side of rope R to the downstream side. As a result, film F, pulled by rope R, moves downstream.

[0098] At this time, the rope R is wound around the conveyor roller 20 disposed within the storage tank 11. Therefore, the film F, pulled downstream by the rope R, moves downstream while being wound around the conveyor roller 20, just like the rope R. In other words, because the film F moves downstream due to the pull of the rope R, it moves along the path of the rope R. The path of the rope R is the path along which it is wound onto the conveyor roller 20 disposed within the storage tank 11, that is, along the conveyor path 25 of the film F. Therefore, the film F, moved downstream by the pull of the rope R, moves downstream along the conveyor path 25 of the film F, which is substantially the same as the path of the rope R, and is wound sequentially starting from the upstream conveyor roller 20.

[0099] In addition, the rope R is wound across multiple storage tanks 11 by the sheet feeding device 30 configured for each storage tank 11 and the conveyor roller 20. Therefore, the film F, which is moved by the rope R, moves across multiple storage tanks 11 and is wound around the conveyor roller 20 in each storage tank 11.

[0100] Thus, while the film F is moved downstream along the conveying path 25 by pulling the rope R from the downstream side, the conveyor roller 20 rotates during the movement. That is, when the conveyor roller 20 is stopped, the film F is difficult to move due to friction between the film F and the conveyor roller 20, and friction between the rope R and the conveyor roller 20. Therefore, the conveyor roller 20 is rotated in a direction that allows the film F to move from the upstream side to the downstream side in the conveying direction. Thus, the film F moves downstream along the conveying path 25 not only through the force generated by the operator pulling the rope R connected to the film F, but also through the action of the conveyor roller 20 feeding the film F from the upstream side to the downstream side due to its rotation.

[0101] Thus, by pulling the rope R connected to the film F and arranged along the conveying path 25 of the film F from the downstream side in the conveying direction of the film F, the film F is moved, thereby gradually winding the film F around the conveying roller 20 from the upstream side to the downstream side. The film F is wound around the conveying roller 20 sequentially from the upstream side to the downstream side, and finally wound around all the conveying rollers 20 of the extraction device 10, arranged along the conveying path 25 of the film F in the plurality of storage tanks 11.

[0102] When the film F is wound onto the conveyor roller 20 using the sheet feeding device 30 configured for each storage tank 11 of the extraction device 10, after the rope R is wound onto the conveyor roller 20 using the sheet feeding device 30, the rope R is connected to the film F and pulled, thereby winding the film F onto the conveyor roller 20.

[0103] In the sheet feeding device 30, a chain 40, which winds between multiple sprockets 31, is used as a component for winding the rope R onto the conveyor roller 20. Since the chain 40 requires tension adjustment, the sheet feeding device 30 has a tension adjustment section 50 as a component for adjusting the tension of the chain 40. When adjusting the tension of the chain 40 via the tension adjustment section 50, with the chain 40 wound onto each sprocket 31 of the sheet feeding device 30, the mounting bolt 62 securing the sliding base 60 is loosened, and the adjusting bolt 55 is rotated. As a result, the sliding base 60 moves along the guide 53 in the vertical direction Z, and therefore the adjusting sprocket 33, supported by the tension adjustment unit 70 mounted on the sliding base 60, also moves together with the sliding base 60 in the vertical direction Z.

[0104] Since the tension of the chain 40 is changed by moving the adjusting sprocket 33 in the vertical direction Z, the mounting bolt 62 of the fixed sliding base 60 is tightened to achieve the appropriate tension on the chain 40 at the position of the adjusting sprocket 33. In the tension adjustment section 50, the position of the adjusting sprocket 33 in the vertical direction Z is adjusted by adjusting the position of the sliding base 60 in the vertical direction Z, thereby adjusting the tension of the chain 40.

[0105] Furthermore, the driven sprockets 32 of the winding chain 40 are each rotatably supported by bearings 82, and the storage tank 11 of the sheet feeding device 30 stores solvent MC. Therefore, when grease is used as the lubricant for the bearings 82, the grease will flow into the solvent MC when the bearings 82 are immersed in the solvent MC. Therefore, in the sheet feeding device 30 of Embodiment 1, the solvent MC is also used for lubricating the bearings 82 in the driven sprockets 32 disposed in the storage tank 11, and the drive motor 35 is driven to rotate the chain 40 while the storage tank 11 is filled with solvent MC.

[0106] On the other hand, the solvent MC readily vaporizes, so when the solvent MC is stored in the storage tank 11, the chain 40 is cooled by the heat of vaporization of the solvent MC, thus its length tends to shorten. With the chain 40 shortened, the tension of the chain 40 increases, thus increasing the rotational resistance of the sprocket 31. The adjusting sprocket 33, located in the tension adjusting section 50, is supported by a sliding member 80 that can move along the sliding shaft 73. Furthermore, the sliding member 80 is subjected to a force by a spring 75, which acts as a force-applying member, causing the adjusting sprocket 33 to move in the direction that increases the tension of the chain 40.

[0107] Therefore, when the chain 40 is cooled by the heat of vaporization of the solvent MC and its length shortens, the sliding member 80, which supports the adjusting sprocket 33 via the sprocket support member 81, moves along the sliding shaft 73 by the force acting on the adjusting sprocket 33 from the chain 40. This suppresses excessive tension in the shortened chain 40 and excessive rotational resistance during sprocket 31 rotation. Furthermore, since the spring 75 applies a force to the sliding member 80 supporting the adjusting sprocket 33 in the direction of increased chain tension, excessive movement of the sliding member 80 can be suppressed even when the chain 40 moves due to contraction.

[0108] Furthermore, since the spring 75 applies force to the sliding member 80 of the adjusting sprocket 33, even if the chain 40 stretches due to the removal of solvent MC from the storage tank 11, thus reducing the tension of the chain 40, the sliding member 80 will still move in the direction of increasing the tension of the chain 40. Therefore, even when the chain 40 stretches and its tension decreases, the tension of the chain 40 can be maintained by moving the adjusting sprocket 33 and the sliding member 80 together in the direction of increasing the tension of the chain 40. Thus, even when the chain 40 stretches, it can maintain appropriate tension.

[0109] <Effects of Implementation Method 1> In the extraction apparatus 10 of the extraction drying apparatus 1 of Embodiment 1 described above, the sheet feeding device 30 for winding the film F onto the conveying roller 20 of the storage tank 11 for storing the solvent MC has a tension adjusting section 50 for adjusting the tension of the chain 40. The tension adjusting section 50 supports the adjusting sprocket 33 in such a way that it can move in the direction that changes the tension of the chain 40, and has a spring 75 that applies a force to the adjusting sprocket 33 in the direction that increases the tension of the chain 40. Thus, the adjusting sprocket 33 can be moved according to the change in the tension of the chain 40, and the tension of the chain 40 can be continuously maintained at an appropriate level by the force applied to the adjusting sprocket 33 from the spring 75. Therefore, even when the length of the chain 40 is easily varied and the tension of the chain 40 is easily varied, the tension of the chain 40 can be maintained at an appropriate level without the operator manually adjusting the tension of the chain 40.

[0110] Figure 13 This is a front view of the tension adjustment section 150 without a force-applying component. Figure 14 yes Figure 13 The EE view. Unlike the tension adjustment unit 50 of the extraction device 10 in the extraction and drying apparatus 1 of Embodiment 1, as shown... Figure 13 , Figure 14As shown in the tension adjustment section 150, without a force-applying component such as a spring 75, it is difficult to maintain the tension of the chain 40 at an appropriate level. Figure 13 , Figure 14 The tension adjustment unit 150 shown has a base plate 151, a guide 153, and a sliding base 160. The base plate 151 is mounted on the wall 14 located on the upper side of the storage tank 11 by a plurality of mounting bolts 152.

[0111] Similar to Embodiment 1 described above, the sliding base 160 has an elongated hole 161 extending in the vertical direction Z, which is movably mounted to the base plate 151 in the vertical direction Z by mounting bolts 162. Guide members 153 are mounted to the base plate 151 on both sides of the sliding base 160 in the longitudinal direction Y by mounting bolts 154, enabling guidance when the sliding base 160 moves in the vertical direction Z. Furthermore, an adjusting bolt 155 is connected to the sliding base 160, allowing the sliding base 160 to be adjusted in the vertical direction Z by rotating the adjusting bolt 155.

[0112] in addition, Figure 13 , Figure 14 The tension adjustment section 150 shown differs from the tension adjustment section 50 in Embodiment 1. A fixed shaft 170 extending in the width direction X is disposed on the sliding base 160, and the adjustment sprocket 33 is rotatably supported by the fixed shaft 170. In this tension adjustment section 150, the tension of the chain 40 is adjusted by moving the sliding base 160 relative to the base plate 151 in the vertical direction Z. Thus, the fixed shaft 170 disposed on the sliding base 160 and the adjustment sprocket 33 supported by the fixed shaft 170 move together with the sliding base 160 in the vertical direction Z, thereby enabling the adjustment of the chain 40's tension.

[0113] Thus, with the fixed shaft 170 of the support adjustment sprocket 33 positioned in the tension adjustment section 150 of the sliding base 160, the tension adjustment of the chain 40 occurs not only when the chain 40 is wound around the sprocket 31, but also when the chain 40 shortens due to cooling by the solvent MC. The change in chain 40 length caused by the heat of vaporization of the solvent MC differs from the elongation of the chain 40 due to prolonged use, and is therefore prone to more frequent changes. Consequently, the tension of the chain 40 also tends to change frequently. Figure 13 , Figure 14 In the tension adjustment unit 150 shown, whenever the tension of the chain 40 changes, the operator moves the sliding base 160 in the vertical direction Z to adjust the position of the adjusting sprocket 33, thereby adjusting the tension of the chain 40. Therefore, in a system without force-applying components such as a spring 75... Figure 13 , Figure 14In the tension adjustment section 150 shown, the tension adjustment of the chain 40 is relatively complicated.

[0114] In contrast, in the extraction device 10 of the extraction and drying apparatus 1 of Embodiment 1, the tension adjustment section 50 of the sheet feeding device 30 has a tension adjustment unit 70 with a spring 75 as a force-applying component disposed on the sliding base 60, which applies a force to the adjustment sprocket 33 in a direction that increases the tension of the chain 40. Therefore, by applying a force while moving the adjustment sprocket 33 in accordance with the tension of the chain 40, even when the tension of the chain 40 is prone to change, the tension of the chain 40 can be maintained at an appropriate level without the operator manually adjusting it. As a result, the tension of the chain 40 in the sheet feeding device 30 can be easily adjusted.

[0115] Furthermore, the tension adjustment section 50 of the sheet feeding device 30 applies a force to the adjustment sprocket 33, which can move in the direction that changes the tension of the chain 40, in a direction that increases the tension of the chain 40. Therefore, the tension can be maintained at an appropriate level without the operator manually adjusting the tension of the chain 40. This prevents excessive load on the chain 40 due to excessive tension, thus ensuring the durability of the chain 40. Additionally, it prevents excessive load on the bearing 82, which rotatably supports the sprocket 31, due to increased chain tension, thus ensuring the durability of the bearing 82. As a result, the durability of the sheet feeding device 30 is improved.

[0116] Furthermore, the extraction device 10 is equipped with multiple storage tanks 11, and a sheet feeding device 30 is provided for each storage tank 11, thereby improving the durability of the sheet feeding device 30. That is, instead of providing a chain 40 for each storage tank 11, a long chain 40 is wound around the entire extraction device 10. In this case, the drive source of the sprocket 31 is located in one part, and due to the weight of the chain 40, the frictional resistance of the bearing 82 of the sprocket 31 under tension, and the frictional resistance between the rope R and the conveying roller 20, the load on the drive source easily becomes high. In this case, multiple drive sources are provided to distribute the load on the drive source and reduce its load. However, with multiple drive sources, high-precision speed matching between the drive sources is required. That is, if the speed matching accuracy between the multiple drive sources is not high, the tension of the chain 40 between the drive sprockets 34 is prone to differ, thus increasing the travel resistance of the portion of the chain 40 with higher tension, potentially preventing the chain 40 from being driven.

[0117] In contrast, by configuring a sheet feeding device 30 for each storage tank 11 and providing a chain 40 and a drive motor 35 for each storage tank 11, the drive motor 35 provided for each chain 40 can easily control the drive of the sprocket 34. This prevents excessive tension on the chain 40, thus improving the durability of the chain 40 and the bearing 82 of the sprocket 31. Furthermore, even in the event of a failure in the chain 40 or the bearing 82, since each storage tank 11 has its own chain 40, the risk of failure as a whole for the sheet feeding device 30 can be mitigated compared to winding a long chain 40 around the entire device. As a result, the durability of the sheet feeding device 30 is improved.

[0118] Furthermore, the tension adjustment unit 50 includes a sliding shaft 73 and a sliding member 80 that supports the adjustment sprocket 33 and is movably disposed relative to the sliding shaft 73. A spring 75 applies a force to the sliding member 80 in the direction that increases the tension of the chain 40. Therefore, the adjustment sprocket 33 can move in the extending direction of the sliding shaft 73 according to the tension of the chain 40 wound around the adjustment sprocket 33, and apply a force to the chain 40 in the direction of increasing tension. Thus, the tension of the chain 40 can be continuously maintained without adjustment by an operator. As a result, the tension of the chain 40 in the sheet feeding device 30 can be easily adjusted.

[0119] [Implementation Method 2] The extraction and drying apparatus 1 of Embodiment 2 has a structure that is substantially the same as that of the extraction and drying apparatus 1 of Embodiment 1, but is characterized in that the force-applying component of the tension adjustment unit 50 uses a cylinder 100. The other structures are the same as those of Embodiment 1, so their description is omitted and the same reference numerals are used.

[0120] Figure 15 This is a front view of the tension adjustment unit 50 of the extraction and drying apparatus 1 in Embodiment 2. Figure 16 yes Figure 15 The image shows a GG-view view. In the extraction and drying apparatus 1 of Embodiment 2, similarly to the extraction and drying apparatus 1 of Embodiment 1, a sheet feeding device 30 is provided for each storage tank 11 of the extraction apparatus 10. The sheet feeding device 30 has a tension adjusting section 50 for adjusting the tension of the chain 40. In Embodiment 2, the force-applying component of the tension adjusting section 50 differs from that of Embodiment 1; a cylinder 100 is used. The cylinder 100 of the tension adjusting section 50 in Embodiment 2 applies a force to the adjusting sprocket 33 in a direction orthogonal to the axial direction of the adjusting sprocket 33, and in a direction that increases the tension of the chain 40.

[0121] In detail, the cylinder 100 has a main body 101 and a rod 103 that protrudes from the main body 101 and is telescopically configured. A piping connection 102 is provided on the main body 101, and an air pipe (not shown) for supplying air for extending and retracting the rod 103 is connected to the piping connection 102. The main body 101 can extend and retract the rod 103 by supplying air from an external compressor (not shown) or the like through the air pipe from the piping connection 102.

[0122] The rod 103 is composed of a rod-shaped component and is configured to extend and retract freely relative to the main body 101. In Embodiment 2, the cylinder 100 is configured with the rod 103 extending in the vertical direction Z, and with the rod 103 protruding upward relative to the main body 101 in the vertical direction Z. Furthermore, in Embodiment 2, three rods 103 are provided, and the three rods 103 are arranged in the length direction Y.

[0123] A pedestal portion 104 is provided at the front end of the rod 103, that is, at the upper end of the rod 103 in Embodiment 2. The pedestal portion 104 is arranged such that one pedestal portion 104 spans the front ends of the three rods 103. The adjusting sprocket 33 is mounted to the pedestal portion 104 via the mounting member 105.

[0124] In other words, the adjusting sprocket 33 is rotatably supported on a fixed shaft 107 disposed on a base component 106, which is mounted on a mounting component 105. At this time, the base component 106 is mounted on the mounting component 105 with the fixed shaft 107 extending in the width direction X, and the direction in which the fixed shaft 107 extends is consistent with the rotation axis of the adjusting sprocket 33. Therefore, the adjusting sprocket 33 is disposed at the front end of the rod 103 with its axial direction orthogonal to the extension direction of the rod 103 of the cylinder 100.

[0125] In the extraction apparatus 10 of the extraction and drying apparatus 1 of Embodiment 2, the tension adjustment unit 50 includes a cylinder 100, which can extend and retract the rod 103 in the vertical direction Z by means of air supplied from the piping connection 102 of the main body 101. Since the adjustment sprocket 33 is disposed on the rod 103, the tension adjustment unit 50 can move the adjustment sprocket 33 in the vertical direction Z, which is orthogonal to the axial direction of the adjustment sprocket 33, by extending and retracting the rod 103.

[0126] The tension adjustment unit 50 can move the adjustment sprocket 33 in a direction orthogonal to the axis of the adjustment sprocket 33 via the cylinder 100, thus adjusting the tension of the chain 40 wound around the adjustment sprocket 33 by moving the adjustment sprocket 33. In embodiment 2, the chain 40 is also wound around the adjustment sprocket 33 from the top. Therefore, when the rod 103 extends and moves the adjustment sprocket 33 upward, the tension of the chain 40 increases, and when the rod 103 retracts and moves the adjustment sprocket 33 downward, the tension of the chain 40 decreases.

[0127] Furthermore, the adjusting sprocket 33 is positioned at the front end of the rod 103 of the cylinder 100. The cylinder 100 extends and retracts the rod 103 via air. Therefore, when a large force is applied to the rod 103 in the direction of its contraction, the air is compressed, causing the rod 103 to contract. Consequently, when the length of the chain 40 contracts due to the heat of vaporization of the solvent MC stored in the storage tank 11, the tension of the chain 40 increases. This increases the force exerted by the chain 40 on the adjusting sprocket 33, thus increasing the force in the direction of the rod 103's contraction. As a result, the rod 103 slightly contracts due to this force. Consequently, the adjusting sprocket 33 positioned at the front end of the rod 103 moves together with the rod 103 in the direction of easing the tension of the chain 40, thereby preventing excessive increase in tension in the shortened chain 40.

[0128] Furthermore, air supplied to the main body 101 of the cylinder 100 continuously applies a force to the adjusting sprocket 33 via the rod 103, increasing the tension of the chain 40. Therefore, even if the chain 40 stretches due to solvent MC extraction, causing a decrease in chain tension, the extension of the rod 103 causes the adjusting sprocket 33 and the rod 103 to move together in the direction of increasing chain tension, thus ensuring the chain 40 maintains appropriate tension. Thus, even when the chain 40 stretches, it maintains adequate tension.

[0129] In the extraction apparatus 10 of the extraction drying apparatus 1 of Embodiment 2 described above, the force-applying component in the tension adjustment unit 50 that applies a force to the adjustment sprocket 33 in a direction that increases the tension of the chain 40 is a cylinder 100. Therefore, when adjusting the tension of the chain 40, it can be easily adjusted by adjusting the pressure of the air supplied to the cylinder 100. In addition, when the length of the chain 40 shrinks due to the heat of vaporization of the solvent MC stored in the storage tank 11, and the tension of the chain 40 increases, the force acting on the rod 103 of the cylinder 100 from the chain 40 via the adjustment sprocket 33 increases, causing the rod 103 to slightly contract. As a result, excessive increase in the tension of the chain 40 can be mitigated, and the tension of the chain 40 can be maintained at an appropriate level without the need for operator adjustment. As a result, the tension of the chain 40 in the sheet feeding device 30 can be easily adjusted.

[0130] [Implementation Method 3] The extraction and drying apparatus 1 of Embodiment 3 has a structure that is substantially the same as that of the extraction and drying apparatus 1 of Embodiment 1, but is characterized in that the tension adjustment unit 50 uses a swing member 111 that swings around the swing shaft 110. The other structures are the same as those of Embodiment 1, so their description is omitted and the same reference numerals are used.

[0131] Figure 17 This is a schematic diagram of the tension adjustment section 50 of the extraction and drying apparatus 1 according to Embodiment 3. In the extraction and drying apparatus 1 of Embodiment 3, similar to the extraction and drying apparatus 1 of Embodiment 1, a sheet feeding device 30 is provided for each storage tank 11 of the extraction apparatus 10, and the sheet feeding device 30 has a tension adjustment section 50 for adjusting the tension of the chain 40. In Embodiment 3, it has a swing shaft 110 parallel to the axial direction of the sprocket 31, a swing member 111 that swings around the swing shaft 110, and a counterweight 115 connected to the swing member 111.

[0132] The swing member 111 is a member that extends in a predetermined direction and is connected to the swing shaft 110 between its two ends in the extending direction. Thus, the swing member 111 can swing freely about the swing shaft 110. Furthermore, an adjustment sprocket 33 is disposed at one end of the swing member 111.

[0133] The counterweight 115 is connected to the opposite side of one side of the sprocket 33 for adjusting the configuration of the oscillating member 111. As a result, the counterweight 115 applies a force to the oscillating member 111 in the direction that moves the adjusting sprocket 33 toward the direction that increases the tension of the chain 40, causing the oscillating member 111 to oscillate around the oscillating axis 110.

[0134] In detail, in embodiment 3, the chain 40 is also wound around the adjusting sprocket 33 from the top. On the other hand, the counterweight 115, which is connected to the other end of the sprocket 33 for adjusting the configuration of the swing member 111, applies a force to the swing member 111, pressing the end connected to the counterweight 115 downward. The swing member 111 swings about the swing axis 110 in a downward direction Z, with the force applied from the counterweight 115.

[0135] Therefore, the end opposite to the side of the connecting counterweight 115 of the swing member 111 moves upward in the Z direction due to the swing of the swing member 111, and the adjusting sprocket 33, which is located at the end opposite to the side of the connecting counterweight 115 of the swing member 111, moves upward due to the swing of the swing member 111. Since the chain 40 is wound around the adjusting sprocket 33 from the top, the tension of the chain 40 increases when the adjusting sprocket 33 moves upward.

[0136] Therefore, in other words, the force applied to the oscillating member 111 by the counterweight 115 functions as a force that causes the oscillating member 111 to oscillate about the oscillating axis 110 in a direction that increases the tension of the adjusting sprocket 33 on the chain 40. Thus, in Embodiment 3, the counterweight 115 is configured as a force-applying member that applies a force to the adjusting sprocket 33 via the oscillating member 111 in a direction that increases the tension of the chain 40.

[0137] Furthermore, the mass of the counterweight 115 is preferably set appropriately based on the downward force exerted by the chain 40 on the adjusting sprocket 33 due to the tension of the chain 40, the length of the swing member 111, and other factors.

[0138] In the extraction device 10 of the extraction and drying apparatus 1 of Embodiment 3, since the adjusting sprocket 33 is positioned at one end of the swing shaft 110 connected to the counterweight 115 at the other end, a force continuously acts on the adjusting sprocket 33 in the upward direction. As a result, the adjusting sprocket 33 continuously applies a force in the direction of increasing tension to the chain 40 wound from the upper side of the adjusting sprocket 33.

[0139] On the other hand, since the swinging component 111 of the mounting adjustment sprocket 33 swings around the swinging shaft 110, when a large force is applied to the adjustment sprocket 33 from the chain 40 in the direction of pressing the adjustment sprocket 33, the swinging shaft 110 swings due to the force, thereby causing the adjustment sprocket 33 to descend downward.

[0140] Therefore, when the chain 40 is cooled by the heat of vaporization of the solvent MC stored in the storage tank 11, and the length of the chain 40 shortens, thereby increasing the tension of the chain 40, the downward force acting on the adjusting sprocket 33 from the chain 40 increases, causing the swing shaft 110 to swing, thereby moving the adjusting sprocket 33 in the downward direction. This alleviates the tension of the chain 40 and prevents excessive increase in tension in the shortened chain 40.

[0141] Furthermore, when the shortened chain 40 is elongated, the adjusting sprocket 33 moves upward via the force applied from the counterweight 115 through the swing member 111, thus ensuring the tension of the chain 40. Therefore, even when the chain 40 is elongated, the chain 40 can maintain appropriate tension.

[0142] In the extraction apparatus 10 of the extraction and drying apparatus 1 of Embodiment 3 described above, the tension adjustment unit 50 has a swing member 111 that swings around a swing shaft 110. An adjustment sprocket 33 is disposed at one end of the swing member 111, and a counterweight 115 is connected to the other end of the swing member 111. Therefore, by swinging the swing member 111 around the swing shaft 110, the adjustment sprocket 33 can be moved in the direction of the change in tension of the chain 40, and a force that increases the tension of the chain 40 can be applied to the adjustment sprocket 33 with a simple structure. Thus, even if the length of the chain 40 shrinks due to the heat of vaporization of the solvent MC stored in the storage tank 11, and the tension of the chain 40 increases, the adjustment sprocket 33 can be pressed down by the downward force acting from the chain 40 on the adjustment sprocket 33, thereby reducing the tension of the chain 40. Therefore, excessive tension in chain 40 can be prevented, and the tension in chain 40 can be maintained at an appropriate level without the need for operator adjustment. As a result, the tension of chain 40 in sheet feeding device 30 can be easily adjusted.

[0143] [Variation Example] Furthermore, in Embodiment 1 described above, the sliding member 80 of the adjusting sprocket 33, supported by the sprocket support member 81, moves freely in the vertical direction Z along the sliding shaft 73 extending in the vertical direction Z. The spring 75 applies an upward force to the sliding member 80, but the direction of movement of the sliding member 80 and the direction of the force can also be other than these directions. In Embodiment 2, the cylinder 100 is arranged with the rod 103 extending in the vertical direction Z, and an upward force is applied to the adjusting sprocket 33 disposed at the front end of the rod 103. However, the orientation of the cylinder 100 and the direction of the force can also be other than these directions. The direction of movement of the adjusting sprocket 33 is only required to change the tension of the chain 40 by moving the adjusting sprocket 33, and the direction of the force is only required to increase the tension of the chain 40 wound around the adjusting sprocket 33.

[0144] In addition, in the above-described embodiment 2, the cylinder 100 uses a cylinder with three rods 103, but the cylinder 100 may also use a cylinder of other forms.

[0145] Furthermore, in embodiments 1 to 3 described above, the extraction apparatus 10 stores a solvent MC for extracting the liquid plasticizer immersed in the film F in its storage tank 11. However, the liquid stored in the storage tank 11 may also be a liquid other than the solvent MC. The extraction apparatus 10 may, for example, be a structure in which a storage tank 11 storing the solvent MC and a storage tank 11 located upstream of the film F in the conveying direction and storing water from which the solvent MC has been removed from the film F are arranged. In this case, it is preferable to provide a sheet introduction device 30 for both the storage tank 11 storing the solvent MC and the storage tank 11 storing the water.

[0146] Explanation of reference numerals in the attached figures 1…Extraction and drying apparatus 10…Extraction device 11… Storage tank 12…Wall 13…Bottom 14…Wall 15… Top surface 16…Opening and closing the door from the control port 20… conveyor rollers 21… Conveyor Roller Support Components 25…Conveying path 30…Sheet feeding device 31…sprocket 32…Driven sprocket 33… Adjustment sprocket 34…Drive sprocket 35… drive motor 40… chain 41… Attachment 42…hole 50…Tension Adjustment Section 51…base plate 52… Mounting bolts 53…guide 54… Mounting bolts 55… Adjusting bolt 60… Sliding base 61…long hole 62… Mounting bolts 63…Guide components 70…Tension Adjustment Unit 71… bracket 72… Mounting bolts 73… Sliding axis 74…nut 75… Spring 80… Sliding parts 81…Sprocket support components 82…bearing 83…Outer ring pressing component 84… Mounting Bolts 85…Inner ring pressing component 86… Mounting bolts 100… cylinders 101…Main Body 102… Piping Connection 103… pole 104…pedestal part 105… Installation components 106…base components 107… Fixed Shaft 110…Swing axis 111… Oscillating component 115… counterweight F…thin film R…rope MC…solvent

Claims

1. An extraction device, characterized in that, have: Storage tank, used to store liquid for the membrane to pass through; Multiple conveying rollers are arranged in the storage tank and convey the film; and A sheet feeding device is disposed in the storage tank and is used to wind the film onto a plurality of the conveying rollers; The sheet feeding device has the following features: Sprockets, at least a plurality of which are arranged on the wall of the storage tank, and have portions arranged along a conveying path for conveying the film along the plurality of conveying rollers; A chain, wound around a plurality of said sprockets, and connected to a rope for winding the film around a plurality of said conveyor rollers; as well as The tension adjustment unit is equipped with a portion of the sprockets among a plurality of sprockets, supports the sprockets in such a way that the sprockets can move in the direction that changes the tension of the chain, and has a force-applying component that applies a force to the sprockets in the direction that increases the tension of the chain.

2. The extraction device according to claim 1, characterized in that, The storage tank is provided in multiple ways. The sheet feeding device is configured for each of the storage tanks.

3. The extraction device according to claim 1 or 2, characterized in that, The tension adjustment unit has: The sliding shaft extends in a direction orthogonal to the axial direction of the sprocket; as well as A sliding component supports the sprocket and is configured to move freely relative to the sliding shaft in the extending direction of the sliding shaft; The force-applying component applies a force to the sliding component in the direction of extension of the sliding shaft and in the direction that increases the tension of the chain.

4. The extraction device according to claim 1 or 2, characterized in that, The force-applying component is a cylinder that applies a force to the sprocket in a direction orthogonal to the axial direction of the sprocket, and in a direction that increases the tension of the chain.

5. The extraction device according to claim 1 or 2, characterized in that, The tension adjustment unit has: The oscillating shaft is parallel to the axial direction of the sprocket; and The swinging component is connected to the swinging shaft between its two ends in the extending direction, swings about the swinging shaft, and has the sprocket disposed at one end. The force-applying component is a counterweight, which is connected to the other end of the swing component. The counterweight applies a force to the swing component, causing it to swing about the swing axis in a direction that increases the tension of the chain on the sprocket.

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