Unwanted film winding device and method for winding unwanted film

Abstract

This invention provides a waste film winding device and a waste film winding method that can efficiently separate and recover waste film from the core. [Solution] The waste film winding device 1 comprises a winding roller 50 and a bearing that supports it rotatably and while pressing it along the axis of rotation. The winding roller 50 comprises a cylindrical cylinder 51, a shaft diameter changing bar 52 that is movable between a first position close to the surface and a second position spaced radially outward from the surface and extends along the axis of rotation, a push bar 55 that is movable along the axis of rotation and extends along the axis of rotation, and a link portion that connects the shaft diameter changing bar 52 and the push bar 55. When the push bar 55 moves in the pressing direction due to the pressing when the winding roller 50 is attached to the bearing portion, the shaft diameter changing bar 52 is displaced from the first position to the second position via the link portion.

Description

Technical Field

[0001] The present invention relates to an apparatus for winding up unnecessary film remaining on a core when a roll of base fabric wound in a roll shape is used up.

Background Art

[0002] In various applications, it is sometimes necessary to handle rolls of resin or paper films wound around a winding core. By supplying such a roll-shaped film to a processing apparatus, the film can be cut to an arbitrary length, increasing the degree of freedom in processing. However, when the roll-shaped film is used up, a film of a short length that is less than the unit length used in the processing apparatus cannot be supplied as it is. Therefore, it is discarded as unnecessary film after being replaced with a new roll. However, the material of the roll core and the material of the film are usually different. For example, the core may be made of paper and the film may be made of resin. In such a case, if the core with the unnecessary film wound around it is discarded, it is not possible to separate and recycle the materials, which is not preferable in terms of environmental response. On the other hand, although it may be possible to unwind the unnecessary film from the core and discard it separately, the work load of manually unwinding the film wound under tension from the core is large.

[0003] Examples of devices that separate unwanted film remaining on a core without adding extra work load include those described in Patent Documents 1 and 2. Patent Document 1 describes a web winding device comprising a roll onto which a strip of web is wound, a drive unit for rotating the roll, and an insertion rod provided separately from the roll and attachable to the outer surface of the roll. In this web winding device, when the roll is rotated by the drive unit, the strip of web is wound onto the combination of the roll and the insertion rod attached to the outer surface of the roll. Patent Document 2 describes a paper winding device comprising at least two support members, contact parts that abut the ends of the two support members, a flange, a means for adjusting the distance between the support members, and a rotating means. In this paper winding device, the flange is provided midway between the two support members and arranged substantially vertically. The means for adjusting the distance between the support members widens the distance when the two support members are advanced and narrows the distance when they are retracted. Furthermore, the rotating mechanism rotates the two support members via a support member spacing adjustment mechanism.

[0004] In Patent Document 1, after attaching an insertion rod to the outer surface of a roll, the roll is rotated to wind a strip-shaped web onto the combination of the roll and the insertion rod attached to its outer surface. Then, after the strip-shaped web is wound onto the combination of the roll and the insertion rod, the insertion rod located between the roll and the web is removed from the outer surface of the roll, creating a gap between the outer surface of the roll and the web. In this document, the work of attaching and removing the insertion rod to the outer surface of the roll is required, which tends to make the work efficiency poor.

[0005] Furthermore, in Patent Document 2, since the two support members are rotated via a means for adjusting the distance between the support members, there are safety concerns, such as the possibility of an object interfering with the space between the two support members and getting caught in the object. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2017-1787 [Patent Document 2] Japanese Patent Application Publication No. 5-193795 [Overview of the project] [Problems that the invention aims to solve]

[0007] This disclosure is made in view of the above circumstances, and aims to provide a waste film winding device and a waste film winding method that can efficiently separate and recover waste film, which is residue remaining on the core of a roll of film, from the core. [Means for solving the problem]

[0008] The first configuration of the waste film winding device according to this embodiment comprises a winding roller for winding waste film, and a bearing portion that rotatably supports the winding roller while pressing it along the axis of rotation, wherein the winding roller comprises a cylindrical cylinder, a shaft diameter changing bar that is movable between a first position close to the surface of the cylinder and a second position further radially outward from the surface of the cylinder than the first position and extends along the axis of rotation, a push bar that is movable inside the cylinder along the axis of rotation and extends along the axis of rotation, and a link portion that connects the shaft diameter changing bar and the push bar, wherein when the push bar moves in the direction of the pressure received in the axis of rotation when the winding roller is attached to the bearing portion, the shaft diameter changing bar is displaced from the first position to the second position via the link portion.

[0009] Furthermore, a second configuration of the waste film winding device according to another embodiment of this invention is such that, in the first configuration described above, the link portion includes at least a first link portion and a second link portion of the same shape, and the first link portion and the second link portion may be arranged toward each other along the axis of rotation.

[0010] Furthermore, a third configuration of the waste film winding device according to another form of this embodiment further comprises a supply unit for unwinding the waste film in the first or second configuration described above, wherein the supply unit may rotatably support a roller on which the waste film is wound.

[0011] Furthermore, a fourth configuration of the waste film winding device according to another form of this embodiment may be configured such that, in any of the first to third configurations described above, the link portion includes a first link, a second link, a second joint that rotatably connects one end of the first link and the second link to the push bar, a first joint that rotatably connects the other end of the first link opposite to the second joint to the shaft diameter changing bar, and a third joint that rotatably connects the other end of the second link opposite to the second joint to the cylinder.

[0012] A fifth configuration of the method for winding up unwanted film according to this embodiment includes a step of preparing a winding roller comprising: a cylindrical cylinder; a shaft diameter changing bar that is movable between a first position close to the surface of the cylinder and a second position further radially outward from the surface of the cylinder than the first position and extends along the axis of rotation; a push bar that is movable inside the cylinder along the axis of rotation and extends along the axis of rotation; and a link portion connecting the shaft diameter changing bar and the push bar; and a bearing that rotatably supports the winding roller while pressing it along the axis of rotation. The process includes: setting the unit in the bearing; moving the push bar in the direction of the pressing due to the pressure received in the direction of the rotation axis when the winding roller is attached to the bearing, thereby displacing the shaft diameter changing bar from a first position to a second position via the link; winding the unwanted film onto the winding roller so that it passes outside the top of the shaft diameter changing bar; removing the winding roller from the bearing when there is no more unwanted film to be wound; and removing the unwanted film from the winding roller using the gap between the winding roller and the unwanted film. [Effects of the Invention]

[0013] According to this embodiment, it is possible to provide a waste film winding device and a waste film winding method that can efficiently separate and recover waste film, which is residue remaining on the core of a roll of film, from the core. [Brief explanation of the drawing]

[0014] [Figure 1] This is a schematic perspective view illustrating an example of an unwanted film winding device according to the present disclosure. [Figure 2] This is a front view from the Y direction, illustrating the configuration and operation of the waste film winding device. [Figure 3] This is a side view from the +X direction illustrating the configuration and operation of the waste film winding device. [Figure 4] This is a side view from the Y direction illustrating the displacement of the shaft diameter changing bar in a winding roller. [Figure 5] This flowchart illustrates an example of a method for winding up unwanted film using the unwanted film winding device according to the embodiment of this disclosure. [Modes for carrying out the invention]

[0015] Hereinafter, an example of the waste film winding device and waste film winding method of this disclosure will be described with reference to the drawings, etc. However, the waste film winding device and waste film winding method of this disclosure are not limited to the devices and methods of the embodiments described below.

[0016] The following figures are schematic representations. Therefore, the size, shape, and thickness of each layer in the cross-sectional view are exaggerated as appropriate to facilitate understanding. In addition, hatching indicating the cross-section of members is omitted as appropriate in each figure. The numerical values ​​such as dimensions and material names of each member described herein are examples of embodiments and are not limiting; they can be selected and used as appropriate. In this specification, terms that specify shape and geometric conditions, such as parallel, orthogonal, and perpendicular, are used not only in their strict sense but also to include substantially the same state. Furthermore, for the sake of explanation, terms such as "above" or "below" may be used in explanations, but the vertical direction may be reversed, and the same applies to the left-right direction.

[0017] 1. Embodiments of the Disclosure A typical embodiment of the unnecessary film winding device of the present disclosure will be described. Here, for the sake of convenience in explaining the unnecessary film winding device 1, an XYZ coordinate system is provided. In the unnecessary film winding device 1, a Y-axis is provided along the rotation axis direction of the winding roller 50, and a Z-axis is provided along the vertical direction. Also, an X-axis orthogonal to the Y-axis and the Z-axis is provided. Regarding the X-axis, the direction in which the film 110 is conveyed from the supply unit 20 toward the winding roller 50 is taken as the +X direction side, and the opposite direction is taken as the -X direction side. Also, when looking at the +X direction with the right hand, the direction toward the front side is taken as the -Y direction side, the opposite direction is taken as the +Y direction side, the vertically upward direction is taken as the +Z direction side, and the vertically downward direction is taken as the -Z direction side.

[0018] FIG. 1 is a schematic perspective view of the unnecessary film winding device 1 according to the present embodiment. FIG. 2 is a front view seen from the -Y direction for explaining the configuration and operation of the unnecessary film winding device 1. FIG. 2(a) is a view showing a state in which the film 110 indicated by a thick line fed out from the original roll 100 set in the supply unit 20 is wound around the winding roller 50 that is rotationally driven by the motor unit 40. FIG. 2(b) is a view showing a state in which the film 110 wound around the winding roller 50 is wound around the winding roller 50 so as to pass outside the apex of the shaft diameter changing bar 52 as the unnecessary film 120.

[0019] FIG. 2(c) is a view for explaining the process until the unnecessary film 120 wound around the winding roller 50 is removed from the winding roller 50. Also, FIG. 3 is a side view seen from the +X direction for explaining the internal state of the winding roller 50 before and after setting the winding roller 50 in the motor unit 40 and the winding unit 30 of the unnecessary film winding device 1. FIG. 3(a) is a view showing the internal state of the winding roller 50 before setting the winding roller 50, and FIG. 3(b) is a view showing the internal state of the winding roller 50 after setting the winding roller 50. Note that both FIG. 3(a) and FIG. 3(b) are cross-sectional views obtained by cutting the cylinder 51, the shaft diameter changing bar 52, and the fixing bar 54 along the XZ plane for easy viewing of the inside of the winding roller 50.

[0020] [a]Supply Unit The unnecessary film winding device 1, as an example, efficiently separates and recovers the unnecessary film, which is the residue remaining on the core, from the core in the raw roll of the film wound in a roll shape. Here, the raw roll 100 of the film wound in a roll shape is supplied to a processing device that performs some processing. The film includes all kinds of thin films such as resin, paper, metal, etc. to thick sheets, but typically targets thin resin films.

[0021] Such a raw roll 100 is composed of a core 130 and a film 110 wound around the core 130. When the film 110 unwound from the raw roll 100 approaches near the end, the short length of the film that is less than the unit length used in the processing device cannot be supplied as it is, so it is replaced with a new roll-shaped object. At that time, the residue of the raw roll 100 that has been used so far is discarded as unnecessary film. The raw roll 100 to be discarded is set in the supply unit 20 attached to the plate-shaped base frame 10 of the unnecessary film winding device 1. The supply unit 20 can rotatably support the raw roll 100, which is a roller around which the unnecessary film is wound. For example, the supply unit 20 may include two body receiving rollers 21 and 22 that can freely rotate around a rotation axis along the X-axis direction, and support bases 23 and 24 that rotatably support them at both ends along the X-axis.

[0022] Also, the supply unit 20 may be configured to directly support the raw roll 100 rotatably from both ends in the rotation axis direction. For example, a freely rotating chucking unit may be inserted and pressed from both ends of the raw roll 100, or a shaft rod that allows the raw roll 100 to rotate freely may be inserted into the raw roll 100. By the supply unit 20 having the above configuration, the film 110 is pulled from the raw roll 100 toward the winding roller 50 by the rotational force of the drive shaft 43 of the motor unit 40 described later. As a result, the film 110 of the raw roll 100 is efficiently wound by the winding roller 50. Note that the supply unit 20 is not an essential component of the unnecessary film winding device 1.

[0023] [b]Winding Unit The film 110, which is the waste film unwound from the raw material roll 100 set in the supply unit 20, is wound up by a winding roller 50 that is rotatably positioned downstream in the direction of the rotation axis. Typically, as shown in Figures 3(a) and 3(b), one end of the winding roller 50 is detachably connected to a bearing unit 41 that transmits the rotational force of the drive shaft 43 of the motor unit 40 to the winding roller 50, causing it to rotate. In this embodiment, the winding roller 50 has a winding shaft 56 protruding from one end on the +Y direction side along the rotation axis, which has a smaller diameter than the cylinder 51 of the winding roller 50, while the other end on the -Y direction side, which is connected to the bearing unit 41 that rotates together with the drive shaft 43 of the motor unit 40, does not have such a winding shaft protrusion.

[0024] Accordingly, the winding section 30 of this embodiment consists of a bearing section 31, which is a plate material with a U-shaped opening facing upwards and is attached to a plate-shaped base frame 10. By lowering the winding shaft 56, which is one end of the winding roller 50, into the U-shaped opening of the bearing section 31 from above, one end of the winding roller 50 can be rotatably supported. Typically, the winding roller 50 set in the winding section 30 is positioned so that its axis of rotation is approximately parallel to the raw material roll 100 set in the supply section 20. This makes the tension applied to the film 110 approximately uniform in the width direction of the film 110, and stabilizes the transport of the film 110. As a result, as shown in Figures 2(a) and 2(b), the film 110 from the raw material roll 100 can be wound up by the winding roller 50 set in the winding section 30.

[0025] [c] Motor section On the other hand, the other end of the winding roller 50 is detachably connected to a bearing portion 41 that transmits the rotational force of the drive shaft 43 of the motor unit 40 to the winding roller 50, causing the winding roller 50 to rotate. As shown in Figure 3(a), the motor unit 40 transmits the rotational force of the motor generated in the drive unit 42 to the drive shaft 43, and the bearing portion 41 provided at the +Y direction end of the drive shaft 43 rotates together with the drive shaft 43. Here, the bearing portion 41 has a coupling portion 44 formed therein for chucking the winding roller 50. The coupling portion 44 consists of a recess 44a that supports the outer surface of the cylinder 51 of the winding roller 50 from the outside, and a protrusion 44b that presses the side surface of the cylinder 51 of the winding roller 50 in the +Y direction.

[0026] In this way, the bearing portion 41 allows the rotational force of the drive shaft 43 to be directly transmitted to the winding roller 50 via a coupling portion 44 that can fit the winding roller 50 to its outer surface and side surface, thereby allowing the winding roller 50 to rotate. In this embodiment, the rotation of the winding roller 50 has been described as being caused by the rotation of the motor in the motor portion 40, but the winding roller 50 may be rotated by other means other than the electrical force of such a motor. For example, an air motor that utilizes air pressure may be used, or the winding roller 50 may be rotated manually using a hand crank or the like. According to the latter method, the entire waste film winding device 1 can be operated without using electricity or air power, and the waste film winding work can be performed anywhere.

[0027] [d] winding roller The winding roller 50 comprises a cylindrical cylinder 51 and a shaft diameter changing bar 52 extending along the rotation axis direction, i.e., the Y-axis direction, of the winding roller 50. The winding roller 50 also comprises a push bar 55 extending along the rotation axis direction, i.e., the Y-axis direction, which is movable inside the cylinder 51 along the rotation axis direction of the winding roller 50, and a link portion 53 connecting the shaft diameter changing bar 52 and the push bar 55. The shaft diameter changing bar 52 is movable between a first position close to the surface of the cylinder 51 and a second position further radially outward from the surface of the cylinder 51 than the first position.

[0028] The first position refers to position D, where the shaft diameter changing bar 52 is closest to the surface of the cylinder 51 when the winding roller 50 is not set in the winding section 30 or motor section 40, as shown in Figure 3(a). The second position refers to position E, where the shaft diameter changing bar 52 is furthest from the surface of the cylinder 51 when the winding roller 50 is set in the winding section 30 or motor section 40, as shown in Figure 3(b). Thus, depending on the conditions, the shaft diameter changing bar 52 can take on a first position close to the surface of the cylinder 51 and a second position further outward from the surface of the cylinder 51.

[0029] Furthermore, as shown in Figures 3(a) and 3(b), a push bar 55 is positioned inside the cylinder 51 of the winding roller 50, approximately parallel to the shaft diameter changing bar 52. In addition, the shaft diameter changing bar 52 and the push bar 55 are rotatably connected to link sections provided at three locations along the rotation axis. Specifically, the link section 53 comprises a first link 53a connecting the upper first joint 53c and the lower second joint 53d, and a second link 53b connecting the second joint 53d and the lower third joint 53e. The first joint 53c rotatably connects the shaft diameter changing bar 52 and the first link 53a. The second joint 53d rotatably connects the first link 53a and the second link 53b. The third joint 53e rotatably connects the second link 53b and the cylinder 51.

[0030] Specifically, the link section 53 comprises a first link 53a and a second link 53b. The link section 53 also includes a second joint 53d that rotatably connects one end each of the first link 53a and the second link 53b to the push bar 55. Furthermore, the link section 53 includes a first joint 53c that rotatably connects the other end of the first link 53a, opposite to the second joint 53d, to the shaft diameter changing bar 52. Furthermore, the link section 53 includes a third joint 53e that rotatably connects the other end of the second link 53b, opposite to the second joint 53d, to the cylinder 51.

[0031] In this embodiment, a first link section 53p, a second link section 53q, and a third link section 53r, all of the same structure, are provided at the left end, center, and right end of the winding roller 50 along the rotation axis. The number of sets of the same structure as the link section 53 is arbitrary, but it is preferable to have at least two sets. That is, it is preferable that the winding roller 50 is composed of at least a first link section and a second link section of the same shape, and that the first link section and the second link section are arranged relative to each other along the rotation axis. This allows the raising and lowering of the shaft diameter changing bar 52 to be performed uniformly along the rotation axis of the winding roller 50, and the gap between the excess film 120 and the outer surface of the cylinder 51 can be appropriately maintained.

[0032] The cylinder 51 is provided with a first hole 51a equal to the number of link portions 53. A first joint 53c is provided at the lower end of the shaft diameter changing bar support portion 52a that extends upward, and the upper end of the shaft diameter changing bar support portion 52a is joined to the shaft diameter changing bar 52. The shaft diameter changing bar support portion 52a is positioned to pass through the first hole 51a. On the other hand, the cylinder 51 is provided with a fixing bar 54 on its outer surface opposite to the shaft diameter changing bar 52, which is fixed to the cylinder 51. Furthermore, a second hole 51b is provided equal to the number of link portions 53. A third joint 53e is provided on the fixing bar 54, which is the lower end of the second link 53b, and the lower end of the second link 53b and the third joint 53e are positioned to pass through the second hole 51b. Note that the fixing bar 54 is not required, in which case the third joint 53e may be directly attached to the inner surface of the cylinder 51.

[0033] Here, the link section 53 is a two-joint link mechanism consisting of a first link 53a and a second link 53b, with a third joint 53e fixed to the cylinder 51, and the first joint 53c and second joint 53d being pairs whose positions fluctuate relative to the cylinder 51. By appropriately selecting the lengths of the first link 53a and the second link 53b, the horizontal movement of the second joint 53d (along the X-axis) is converted into vertical movement of the first joint 53c (along the Z-axis). That is, when a horizontal displacement is applied to the push bar 55 to which the second joint 53d is provided, a vertical displacement can be generated in the shaft diameter changing bar 52, which is integrally connected to the shaft diameter changing bar support section 52a to which the first joint 53c is provided.

[0034] For example, consider the case where the winding roller 50 is not set in the motor unit 40 or winding unit 30, as shown in Figure 3(a), with the shaft diameter changing bar 52 positioned above the winding roller 50. In this case, the shaft diameter changing bar 52 is displaced by its own weight to the first position closest to the outer surface of the cylinder 51 (position D). At this time, the second joint 53d is displaced to the leftmost position (-Y direction) compared to the first joint 53c and the third joint 53e, and the tip of the push bar 55 is displaced to a position where it protrudes to the left of the side surface of the cylinder 51.

[0035] On the other hand, as shown in Figure 3(b), when the winding roller 50 is set on the motor unit 40 or the winding unit 30, the bearing unit 41 of the motor unit 40 is connected to the left side of the cylinder 51, as described above. At this time, the push bar 55 moves in the direction of the pressure received in the direction of the rotation axis when the winding roller 50 is attached to the bearing unit 41. The direction of the pressure is to the right (+Y direction). Here, the second joint 53d is displaced to the far right (+Y direction side) compared to the first joint 53c and the third joint 53e, and the left tip of the push bar 55 is displaced to a position to the right of the left side of the cylinder 51.

[0036] At this time, the first joint 53c rises to its highest position, and the shaft diameter changing bar 52 is displaced to a second position (position E) that is radially spaced outward from the outer surface of the cylinder 51. In other words, when the push bar 55 moves in the direction of the pressure received in the direction of the rotation axis when the winding roller 50 is attached to the bearing part 41, the shaft diameter changing bar 52 is displaced from the first position to the second position via the link part 53.

[0037] Figure 4 is a side view of the winding roller 50 as seen from the -Y direction, illustrating the displacement of the shaft diameter changing bar 52. The shaft diameter changing bar 52 in the first position is shown by a dashed line, and the shaft diameter changing bar 52 in the second position is shown by a solid line. The vertex 52b of the shaft diameter changing bar 52 in the first position is displaced to the vertex 52c of the shaft diameter changing bar 52 in the second position. In this embodiment, the vertices 52b and 52c of the shaft diameter changing bar 52 are flat, but this also includes cases where the tip is a convex curved surface or a pointed tip, etc.

[0038] In Figure 4, the difference in the positions of the vertices 52b and 52c of the shaft diameter changing bar 52 at the first and second positions, i.e., the displacement amount, is h. Preferably, h is 5 mm or more and 30 mm or less. When h is 5 mm or more, a sufficient gap can be secured between the excess film 120 wound around the winding roller 50 and the outer surface of the cylinder 51, allowing the excess film 120 to be easily removed from the winding roller 50. Furthermore, when h is 30 mm or less, it is possible to prevent the excess film 120 wound around the winding roller 50 from shifting relative to each other and becoming difficult to remove.

[0039] [e] Method for winding up unwanted film using an unwanted film winding device Next, a method for winding up unwanted film using the unwanted film winding device 1 will be described. Figure 5 is a flowchart illustrating an example of a method for winding up unwanted film using the unwanted film winding device 1 according to this embodiment. First, the raw roll 100, with the film 110 wound around the core 130, is set in the supply unit 20 (step S201 in Figure 5). Next, the winding roller 50 is set in the bearing unit 41 of the motor unit 40 (step S202). In other words, the winding roller 50 is set in the bearing unit 41, which supports it so that it can rotate and is pressed along the axis of rotation. Prior to this, the following predetermined winding roller 50 is prepared.

[0040] In other words, the winding roller 50 comprises a cylindrical cylinder 51, a shaft diameter changing bar 52 extending along the axis of rotation, a push bar 55 extending along the axis of rotation inside the cylinder 51, and a link portion 53. The shaft diameter changing bar 52 is movable between a first position close to the surface of the cylinder 51 and a second position further radially outward from the surface of the cylinder 51 than the first position. The push bar 55 is movable along the axis of rotation inside the cylinder 51. The link portion 53 connects the shaft diameter changing bar 52 and the push bar 55.

[0041] Next, the axial pressure from the bearing portion 41 of the motor portion 40 causes the push bar 55 to be displaced in the axial direction away from the motor portion 40 (step S203). Next, the shaft diameter changing bar 52 is displaced via the link portion 53 in the radial direction of the winding roller 50, away from the surface of the winding roller 50 (step S204). In other words, the pressure received in the direction of the rotation axis when the winding roller 50 is attached to the bearing portion 41 causes the push bar 55 to move in the direction of the pressure, and the shaft diameter changing bar 52 is displaced from the first position to the second position via the link portion 53.

[0042] Next, the film 110 unwound from the raw material 100 is wound onto the take-up roller 50 so that it passes outside the apex of the shaft diameter changing bar 52 (step S205). That is, the film 110 is wound onto the take-up roller 50, including the shaft diameter changing bar 52 which is displaced most radially outward from the cylinder 51. Refer to Figures 2(a) and 2(b) for the winding method. Once the raw material 100 is gone, the take-up roller 50 is removed from the bearing part 41 of the motor unit 40 (step S206). The state of the take-up roller 50 and the excess film 120 when set in the bearing part 41 is state A in Figure 2(c). In this state, since the shaft diameter changing bar 52 is in the second position, the tension on the excess film 120 is high, making it difficult to remove the excess film 120.

[0043] Subsequently, the shaft diameter changing bar 52 returns to its original position along the axial direction (step S207). That is, by removing the winding roller 50 from the bearing portion 41 of the motor unit 40, the pressure on the push bar 55 from the bearing portion 41 is eliminated, and the push bar 55 becomes free. At this time, due to the tension of the wound waste film 120 and the weight of the shaft diameter changing bar 52, the shaft diameter changing bar 52 is displaced from the second position to the first position. The state of the winding roller 50 and the waste film 120 at this time is state B in Figure 2(c). In this state, the shaft diameter changing bar 52 is in the first position, and a suitable gap is created between the outer surface of the cylinder 51 and the waste film 120, making it easy to remove the waste film 120.

[0044] Finally, the excess film 120 is removed from the winding roller 50 and discarded using the gap between the winding roller 50 and the excess film 120 (step S208). The state of the excess film 120 at this time is shown as state C in Figure 2(c). In this state, the excess film 120 can be easily removed using the gap between the outer surface of the cylinder 51 and the excess film 120.

[0045] As described above, the waste film winding device 1 and the waste film winding method using the same of this disclosure provide a waste film winding device and a waste film winding method that can efficiently separate and recover waste film, which is residue remaining on the core of a roll of film, from the core. [Explanation of symbols]

[0046] 1. Unwanted film winding device 10 Base Frames 20 Supply section 21, 22 Body support roller 23, 24 Support stand 30 Winding section 31 Bearing section 40 Motor section 41 Bearing section 42 Drive unit 43 Drive shaft 44 Joint 44a recess 44b Convex part 50 reel rollers 51 cylinders 51a 1st hole 51b 2nd hole 52 Shaft diameter changing bar 52a Support part for changing shaft diameter 52b, 52c vertices 53 Link section 53a Link 1 53b Second Link 53c 1st joint 53d Second joint 53e Third Joint Page 53, Section 1 of Links 53q Second Link Section 53r Third Link Section 54 Fixed Bar 55 Push bar 56 Winding shaft 100 Original fabric 110 film 120 Unnecessary Film 130 cores

Claims

1. A winding roller for winding up unwanted film, The winding roller is supported by a bearing portion that allows it to rotate and presses against it along the axis of rotation, The winding roller comprises a cylindrical cylinder, a shaft diameter changing bar that is movable between a first position close to the surface of the cylinder and a second position further radially outward from the surface of the cylinder than the first position and extends along the axis of rotation, a push bar that is movable inside the cylinder along the axis of rotation and extends along the axis of rotation, and a link portion connecting the shaft diameter changing bar and the push bar. A waste film winding device wherein, when the push bar moves in the direction of the pressing force received in the direction of the rotation axis when the winding roller is attached to the bearing portion, the shaft diameter changing bar is displaced from a first position to a second position via the link portion.

2. The unwanted film winding device according to claim 1, wherein the link portion comprises at least a first link portion and a second link portion having the same shape, and the first link portion and the second link portion are arranged toward each other along the axis of rotation.

3. The system further includes a supply unit for unwinding the aforementioned unwanted film, The waste film winding device according to claim 1, wherein the supply unit rotatably supports the roller on which the waste film is wound.

4. The unwanted film winding device according to any one of claims 1 to 3, wherein the link portion comprises a first link, a second link, a second joint that rotatably connects one end of the first link and the second link to the push bar, a first joint that rotatably connects the other end of the first link opposite to the second joint to the shaft diameter changing bar, and a third joint that rotatably connects the other end of the second link opposite to the second joint to the cylinder.

5. A method for winding up unwanted film, A step of preparing a winding roller comprising: a cylindrical cylinder; a shaft diameter changing bar that is movable between a first position close to the surface of the cylinder and a second position further radially outward from the surface of the cylinder than the first position and extends along the axis of rotation; a push bar that is movable inside the cylinder along the axis of rotation and extends along the axis of rotation; and a link portion connecting the shaft diameter changing bar and the push bar; A step of setting the winding roller in a bearing that supports it while pressing it along the axis of rotation, The process of attaching the winding roller to the bearing portion, the pressing bar moving in the direction of the pressing force when the roller is pressed in the direction of the rotation axis, and the shaft diameter changing bar being displaced from the first position to the second position via the link portion, The process of winding the aforementioned unnecessary film onto the winding roller so that it passes outside the apex of the shaft diameter changing bar, When there is no more of the unnecessary film to be wound up, the winding roller is removed from the bearing, A method comprising the step of removing the unwanted film from the winding roller by utilizing the gap between the winding roller and the unwanted film.

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