Peeling device and laminate peeling method

Abstract

To provide a peeling device and a peeling method capable of surely separating each layer constituting a laminate.SOLUTION: The peeling device comprises: a conveyance unit 30 that includes a plurality of unit conveyance units 31 and conveys a laminate 20; a heating press unit 50 that heats and presses the laminate 20; a peeling unit 70 that peels a second layer 22 of the laminate 20 from a first layer 21; and a state changing unit 80 that changes a state between a first state where a surface 41A of one unit conveyance unit 41 of two adjacent unit conveyance units 31 and a surface 42A of the other unit conveyance unit 42 are the same in height and a second state where a step is generated between the surface 41A of the one unit conveyance unit 41 and the surface 42A of the other unit conveyance unit 42.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to a peeling device and a method for peeling a laminate. [Background technology]

[0002] Conventionally, in order to reuse a used laminate, it has been necessary to separate the layers that make up the laminate. The following Patent Document 1 describes a peeling method in which a laminate (tile carpet) comprising a backing layer and a base fabric is fixed by a pressing and fixing means, and the base fabric is peeled off from the backing layer by a peeling means (base fabric peeling means). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-147773 Summary of the Invention [Problem to be solved by the invention]

[0004] In the peeling method of Patent Document 1, the laminate is fixed by pressing the surface of the backing fabric, making it difficult to bring the peeling means into contact with the entire surface of the backing fabric. This raises concerns that part of the backing fabric may not peel off from the backing layer and remain on the backing layer side. Furthermore, in the method of fixing the laminate by pressing it, there is a concern that the laminate may move during peeling, hindering the peeling process.

[0005] The technology disclosed in this specification was developed based on the above circumstances, and aims to provide a peeling device and a method for peeling a laminate that can reliably separate each layer that makes up the laminate. [Means for solving the problem]

[0006] As a means for solving the above problem, the peeling device disclosed in this specification is characterized by comprising: a conveying section that conveys a laminate comprising a first layer containing a thermoplastic resin and a second layer, and that has a plurality of unit conveying sections arranged along the conveying direction of the laminate; a heating press section that heats and presses the laminate conveyed by the conveying section, thereby welding the first layer to the surface of each of the plurality of unit conveying sections; a peeling section that is arranged downstream of the heating press section in the conveying direction of the laminate by the conveying section, and peels the second layer from the first layer; and a state change section that can change between a first state in which the surface of one unit conveying section and the surface of the other unit conveying section are at the same height for two adjacent unit conveying sections among the plurality of unit conveying sections, and a second state in which a step is generated between the surface of the one unit conveying section and the surface of the other unit conveying section.

[0007] By welding the first layer to the multiple unit conveyance sections in the first state, the stack can be fixed to the unit conveyance sections, and the peeling section can reliably peel the second layer from the first layer. Furthermore, since there is no need to press the stack from the second layer side to fix it, the peeling section can be brought into contact with the entire surface of the second layer, preventing a portion of the second layer from remaining on the first layer side. Furthermore, by placing the multiple unit conveyance sections in the second state while the first layer is welded to the multiple unit conveyance sections, a step can be created on both surfaces of two adjacent unit conveyance sections. This allows a force to be applied to the first layer in a direction away from the surface of one of the two unit conveyance sections, making it easier to separate the first layer from that unit conveyance section. This allows the first layer to be easily removed and collected from the unit conveyance sections.

[0008] The state change unit may be an actuator that can move the one of the unit conveyance units up and down. By moving the one of the unit conveyance units up and down by the actuator, a step can be generated between the surface of the one unit conveyance unit and the surface of the other unit conveyance unit.

[0009] the state changing section comprises first and second guide rails extending along the conveying direction of the stack, and a pair of legs extending downward from each of the plurality of unit conveying sections and aligned along the conveying direction, the first guide rail and the second guide rail being aligned along a direction perpendicular to the conveying direction, one of the pair of legs arranged upstream in the conveying direction having a shorter extension length from the unit conveying section than the other leg, each of the plurality of unit conveying sections being displaceable along both the first and second guide rails with the one leg supported by the first guide rail and the other leg supported by the second guide rail, the first guide rail comprising a first upstream rail portion extending parallel to the surface of the unit conveying section, and a first downstream rail portion extending downstream from the first upstream rail portion and extending in a manner that slopes downward as it moves away from the first upstream rail portion, The second guide rail comprises a second upstream rail portion disposed at the same position as the first upstream rail portion in the conveying direction, and a second downstream rail portion disposed at the same position as the first downstream rail portion in the conveying direction, the second upstream rail portion extending parallel to the first upstream rail portion and disposed at a position lower by an amount corresponding to a difference in the extension lengths of the pair of legs, and the second downstream rail portion extending parallel to the first downstream rail portion and disposed at the same height, and in the first state, each of the one legs of the two unit conveying portions is supported by the first upstream rail portion, and each of the other legs of the two unit conveying portions is supported by the second upstream rail portion, The surface of the other unit conveying unit is parallel to the surface of the one unit conveying unit and is arranged at the same height, and in the second state, one of the legs of the one unit conveying unit arranged upstream of the two unit conveying units is supported on the first upstream rail portion and the other leg of the one unit conveying unit is supported on the second upstream rail portion, and the one leg of the other unit conveying unit is supported on the first downstream rail portion and the other leg of the other unit conveying unit is supported on the second downstream rail portion, so that the surface of the other unit conveying unit is parallel to the surface of the one unit conveying unit and is arranged at a lower position.

[0010] In the above configuration, by displacing the multiple unit conveyance units along both the first guide rail and the second guide rail, two adjacent unit conveyance units can be changed from a first state to a second state. More specifically, in the first state, both of the two unit conveyance units are supported by the first upstream rail portion and the second upstream rail portion. Here, of the two legs of the unit conveyance unit, one of the legs located upstream is set to have a shorter extension length from the unit conveyance unit than the other leg. The second upstream rail portion supporting the other leg is positioned lower than the first upstream rail portion supporting the one leg by the difference in the extension lengths of the pair of legs. Therefore, in the first state, the surface of the other unit conveyance unit is parallel to the surface of one unit conveyance unit and is positioned at the same height.

[0011] On the other hand, in the second state, one upstream unit conveying unit is supported by the first upstream rail portion and the second upstream rail portion, and the other downstream unit conveying unit is supported by the first downstream rail portion and the second downstream rail portion. The first downstream rail portion extends in a manner that slopes downward as it moves away from the first upstream rail portion, and the second downstream rail portion is arranged parallel to the first downstream rail portion. In other words, the second downstream rail portion also extends in a manner that slopes downward as it moves away from the first upstream rail portion. Therefore, the other unit conveying unit is arranged at a lower position than one unit conveying unit.

[0012] The second downstream rail portion supporting the other leg is disposed at the same height as the first downstream rail portion supporting one of the legs. Since the extension length of one leg is shorter than that of the other leg, in the second state, the surface of the other unit conveyance portion is disposed in a shape that slopes upward as it moves downstream relative to the extension direction of the first downstream rail portion and the second downstream rail portion. As a result, in the second state, the other unit conveyance portion can be configured to be lower than one unit conveyance portion, while the surface of the other unit conveyance portion can be disposed so as to be parallel to the surface of the one unit conveyance portion.

[0013] Furthermore, as a means for solving the above-mentioned problems, the method for peeling a laminate disclosed in this specification comprises a heat press process in which a laminate comprising a first layer containing a thermoplastic resin and a second layer is conveyed by a conveying section having a plurality of unit conveying sections, and the laminate is heated and pressed to weld the first layer to each surface of the plurality of unit conveying sections arranged along the conveying direction of the laminate; a peeling process that is performed after the heat press process, in which the second layer is peeled from the first layer; and a step formation process that is performed after the peeling process, in which a step is formed between the surface of one unit conveying section and the surface of the other unit conveying section in two adjacent unit conveying sections among the plurality of unit conveying sections.

[0014] In the heat pressing step, the first layer is welded to the multiple unit conveying sections, thereby fixing the laminate to the conveying sections, and in the peeling step, the second layer can be reliably peeled from the first layer. Furthermore, in the step forming step, with the first layer welded to the multiple unit conveying sections, steps are formed on both surfaces of two adjacent unit conveying sections, which allows a force to be applied to the first layer in a direction away from the surface of one of the unit conveying sections, making it easier to separate the first layer. This allows the first layer to be easily removed and collected from the unit conveying sections. [Effects of the Invention]

[0015] According to the present invention, it is possible to provide a peeling device and a peeling method that can reliably separate each layer that constitutes a laminate. [Brief explanation of the drawings]

[0016] [Figure 1] Cross-sectional view showing the structure of the laminate [Figure 2] FIG. 1 is a front view showing a state in which a vehicle interior material has been cut out from a plate material. [Figure 3] FIG. 1 is a side view showing a peeling device according to a first embodiment (a view showing a heat pressing step). [Figure 4] Side view showing the peeling process [Figure 5]A side view showing the state in which the first layer has been transported to the bottom of the transport section. [Figure 6] A side view showing the step forming process [Figure 7] Cross-sectional view of the peeling device (corresponding to the cross-sectional view taken along line VII-VII in Figure 3) [Figure 8] FIG. 10 is a side view showing a peeling device according to a second embodiment (a view showing a heat pressing step). [Figure 9] A side view showing the step forming process [Figure 10] Cross-sectional view showing the peeling device (corresponding to the cut view along line XX in Figure 8) DETAILED DESCRIPTION OF THE INVENTION

[0017] <Embodiment 1> A first embodiment of the present invention will be described with reference to Figures 1 to 7. As shown in Figure 3, a peeling device 10 of this embodiment includes a conveying section 30 that conveys a laminate 20, a heat press section 50 that heats and presses the laminate 20 conveyed by the conveying section 30, a peeling section 70 that peels the second layer 22 from the first layer 21, and a state changing section 80 that can change the state of the conveying section 30.

[0018] As shown in FIG. 1, the laminate 20 includes a first layer 21, a second layer 22, a third layer 23, and a fourth layer 24. The first layer 21 has the function of preferably absorbing vibrations such as sound (more so than the other layers 22 to 24), and is sometimes called a backing layer. The second layer 22 has the function of absorbing vibrations that the first layer 21 was not able to absorb. The third layer 23 functions as an adhesive for bonding the second layer 22 and the fourth layer 24 together. The fourth layer 24 is a layer that constitutes the surface of the vehicle interior material (described in detail below) that forms the basis of the laminate 20. The fourth layer 24 can improve the texture, feel, design, etc. of the surface of the laminate 20.

[0019] The first layer 21 to the fourth layer 24 are made of a thermoplastic resin. For example, polyethylene (PE) can be used as the thermoplastic resin making up the first layer 21 and the third layer 23, and polyethylene terephthalate (PET), which has a higher melting point than PE, can be used as the thermoplastic resin making up the second layer 22 and the fourth layer 24. The thermoplastic resin making up each of the layers 21 to 24 can be changed as appropriate, and in addition to the above-mentioned thermoplastic resins, for example, polypropylene (PP), polylactic acid (PLA), etc. can be used.

[0020] As shown in Fig. 2, the laminate 20 is scrap material generated when a vehicle interior material 26 is cut out from a plate material 25 having the same cross-sectional configuration as the laminate 20. Specifically, when a vehicle interior material 26 (such as a floor carpet for a vehicle) is manufactured by cutting a rectangular plate material 25 using a forming die or the like, a frame-shaped scrap material 27 is generated. By cutting this scrap material 27 at predetermined locations (dotted chain lines in Fig. 2), a plurality of longitudinal (strip-shaped) laminates 20 can be obtained.

[0021] As shown in FIG. 3, the conveying section 30 includes a plurality of unit conveying sections 31 arranged in the conveying direction of the laminate 20 by the conveying section 30. The plurality of unit conveying sections 31 are arranged in a ring shape. The unit conveying sections 31 are made of, for example, metal plates. As shown in FIG. 3, the hot press section 50 includes a belt 51, a pair of rollers 52, 52 that drive the belt 51, and a heating section 55. The belt 51 is made of, for example, a metal such as stainless steel. As shown in FIG. 7, the facing distance T1 between the lower surface of the belt 51 and the surface 31A of the unit conveying section 31 is set to a value smaller than the thickness L1 (see FIG. 1) of the laminate 20 before passing through the hot press section 50. As a result, the laminate 20 is pressed against the surface 31A of the unit conveying section 31 as it passes under the belt 51.

[0022] As shown in FIG. 3 , the heating unit 55 is disposed below one of the plurality of unit conveyance units 31 that faces the belt 51. The heating unit 55 is, for example, configured with an electric heater and is capable of heating the adjacent unit conveyance units 31. This makes it possible to heat the laminate 20 via the unit conveyance units 31 in the area where the heating unit 55 is disposed. Note that the heating method of the heating unit 55 is not limited to the above-described one. For example, the heating unit 55 may be configured to heat the unit conveyance units 31 by blowing hot air onto them. This makes it possible for the heat press unit 50 to weld the first layer 21 of the laminate 20 to the surfaces 31A (upper surfaces) of the plurality of unit conveyance units 31.

[0023] As shown in Fig. 3, the peeling unit 70 is disposed downstream of the heat pressing unit 50 in the direction in which the laminate 20 is conveyed by the conveying unit 30. Note that Figs. 3 and 4 show a simplified illustration of the portion of the laminate 20 consisting of the second layer 22 to the fourth layer 24. In the following description, the portion of the laminate 20 consisting of the second layer 22 to the fourth layer 24 will be referred to as a portion 28 of the laminate 20.

[0024] The peeling unit 70 includes three rollers 71 and a triangular wire 72 stretched across the three rollers 71. A plurality of blades 73 are formed on the surface of the wire 72. Each roller 71 can be rotated clockwise in FIG. 3 by a driving device (such as an electric motor) (not shown). As a result, by rotating the rollers 71, the wire 72 can be rotated clockwise in FIG. 3.

[0025] The protruding height of the plurality of blades 73 is set to a height that catches on a portion 28 of the laminate 20 when the laminate 20 passes underneath, but does not catch on the first layer 21. This allows the plurality of blades 73 to catch on the portion 28 (including the second layer 22) of the laminate 20, thereby peeling it off from the first layer 21.

[0026] Although not shown, a plurality of wires 72 are arranged along the axial direction of roller 71 (the direction penetrating the plane of the paper in FIG. 3). Rollers 74 are arranged between adjacent wires 72. Parts of rollers 74 are arranged so as to protrude from the surface of wire 72. As a result, as shown in FIG. 4, part 28 of laminate 20 peeled from first layer 21 rides on the surface of roller 74, and is separated by the plurality of blades 73.

[0027] The state changing section 80 is provided with a plurality of actuators 81 that are provided in each of the unit conveying sections 31 and are capable of moving each unit conveying section 31 up and down. The plurality of actuators 81 are arranged along the conveying direction of the stack 20 by the conveying section 30. Each actuator 81 is attached to a drive belt 82 that extends along the conveying direction of the unit conveying section 31. As a result, the unit conveying section 31 is fixed to the drive belt 82 via the actuators 81, and when the drive belt 82 is driven by a drive device (such as an electric motor) not shown, the plurality of unit conveying sections 31 are displaced along the arrangement direction.

[0028] As the actuator 81, for example, an electric motor, an air cylinder, a hydraulic cylinder, or the like can be used. As shown in Fig. 7, the actuator 81 includes a fixed part 83 attached to the drive belt 82, and a movable part 84 movable in the up-and-down direction (direction perpendicular to the extension direction of the drive belt 82) relative to the fixed part 83. As shown in Fig. 7, the actuator 81 and the drive belt 82 are provided as a pair so as to sandwich the unit conveying part 31 from both sides in the width direction (left-right direction in Fig. 7). An end of the unit conveying part 31 in the width direction is attached to the movable part 84.

[0029] The height of the unit conveyance part 31 can be changed by operating the actuator 81. As a result, the state change part 80 can change between a first state (see FIG. 5) in which the height of the surface 41A of one unit conveyance part 41 and the height of the surface 42A of the other unit conveyance part 42 are the same for two adjacent unit conveyance parts 31, 31 (hereinafter referred to as unit conveyance parts 41, 42) among the plurality of unit conveyance parts 31, and a second state (see FIG. 6) in which a step is generated between the surface 41A of one unit conveyance part 41 and the surface 42A of the other unit conveyance part 42.

[0030] Next, a description will be given of a method for peeling off the laminate 20 using the peeling device 10. The method for peeling off the laminate according to this embodiment includes a heat press step for welding the first layer 21 to the surface 31A of the unit conveying section 31, a peeling step that is performed after the heat press step for peeling off a part 28 (including the second layer 22) of the laminate 20 from the first layer 21, and a step forming step that is performed after the peeling step for creating a step between the surfaces of two adjacent unit conveying sections 41, 42.

[0031] (heat pressing process) 3 and 7, in the heat pressing step, with the heating unit 55 operating, the laminate 20 is conveyed by the conveying unit 30 and passed under the belt 51. In this way, the laminate 20 is heated and pressed, thereby welding the first layer 21 to the surface 31A (the surface on the belt 51 side) of the unit conveying unit 31. The heating temperature of the laminate 20 at this time is set to, for example, equal to or higher than the melting point of the PE constituting the first layer 21 and lower than the melting point of the PET constituting the second layer 22.

[0032] (peeling process) In the peeling step, as shown in Fig. 4, a portion 28 of the laminate 20 is caught by a plurality of blades 73 provided in the peeling unit 70, and is peeled off from the first layer 21. The peeled portion 28 is carried to a roller 74 by the plurality of blades 73, and then rides up onto the surface of the roller 74, where it is separated from the plurality of blades 73, and is then collected. Meanwhile, the first layer 21 passes below the peeling unit 70 while being welded to the conveying unit 30. Note that in the heat pressing step and the peeling step, the conveying unit 30 is in the first state, and the surfaces 31A of the plurality of unit conveying units 31 are arranged at the same height.

[0033] (Step formation process) In the step forming process, as shown in Fig. 5, the first layer 21 is conveyed by the conveying section 30, for example, to the lower part of the conveying section 30, and then, as shown in Fig. 6, an actuator 81 provided on a unit conveying section 42 to which one end of the first layer 21 in the conveying direction is welded is operated to lift the unit conveying section 42. This creates steps between the surfaces 41A of the two unit conveying sections 41 and the surfaces 42A of the unit conveying sections 42.

[0034] This allows a force to be applied to the first layer 21 in a direction away from the surface 42A of the unit conveying section 42, making it easier to separate the first layer 21 from this unit conveying section 42. Thereafter, the worker uses, for example, a tool to peel the first layer 21 off the unit conveying section 42, and then grasps a portion of the peeled first layer 21 to peel the remaining portion of the first layer 21 off the other unit conveying section 31. This allows the first layer 21 to be separated from the conveying section 30.

[0035] Next, the effects of this embodiment will be described. According to this embodiment, by welding the first layer 21 to the plurality of unit conveying parts 31 in the first state, the stack 20 can be fixed to the unit conveying parts 31, and the peeling part 70 can reliably peel a portion 28 (including the second layer 22) of the stack 20 from the first layer 21. Furthermore, because there is no need to press the stack 20 from the second layer 22 side to fix it, the peeling part 70 can be brought into contact with the entire surface of the portion 28, and it is possible to prevent a portion of the second layer 22 from remaining on the first layer 21 side.

[0036] Furthermore, by placing the conveying unit 30 in the second state while the first layer 21 is welded to the plurality of unit conveying units 31, a step can be created on both surfaces 41A, 42A of two adjacent unit conveying units 41, 42. This allows a force to be applied to the first layer 21 in a direction away from the surface 42A of the unit conveying unit 42 (the unit conveying unit arranged on the side away from the first layer 21 relative to the unit conveying unit 41) that is positioned higher than the unit conveying unit 41, making it easier to separate the first layer 21 from this unit conveying unit 42. This allows the first layer 21 to be easily removed from the unit conveying unit 42 and collected.

[0037] Moreover, the state changing unit 80 is an actuator 81 that can move the unit conveying unit 42 up and down. Therefore, by moving the unit conveying unit 42 up and down using the actuator 81, a step can be generated between the surface 41A of the unit conveying unit 41 and the surface 42A of the unit conveying unit 42.

[0038] <Embodiment 2> Next, a second embodiment of the present invention will be described with reference to Figures 8 to 10. The same parts as those in the above embodiment are designated by the same reference numerals, and redundant description will be omitted. In the peeling device 110 of this embodiment, the configuration of the state changing unit 180 is different from that in the above embodiment.

[0039] As shown in FIG. 8, the state change unit 180 includes a first guide rail 181 and a second guide rail 191 extending along the conveying direction of the stack 20, and a pair of legs 151, 152 extending downward from each of the multiple unit conveying units 131 constituting the conveying unit 130 and aligned along the conveying direction. As shown in FIG. 10, the first guide rail 181 and the second guide rail 191 are aligned along a direction perpendicular to the conveying direction (the left-right direction in FIG. 10, the width direction of the unit conveying unit 131). The first guide rails 181 are aligned in a pair in the direction perpendicular to the conveying direction, and the second guide rails 191 are aligned in a pair in the direction perpendicular to the conveying direction. The legs 151 are aligned in a pair corresponding to the pair of first guide rails 181, 181, and the legs 152 are aligned in a pair corresponding to the pair of second guide rails 191, 191.

[0040] 8, of the pair of legs 151, 152, one leg 151 arranged on the upstream side in the conveying direction is set to have a shorter extension length from the unit conveying section 131 than the other leg 152. Each of the plurality of unit conveying sections 131 is capable of displacement along both the first guide rail 181 and the second guide rail 191, with the leg 151 supported by the first guide rail 181 and the leg 152 supported by the second guide rail 191. Furthermore, each unit conveying section 31 can be driven by a drive device (not shown) (for example, a drive belt extending along the second guide rail 191).

[0041] The first guide rail 181 is annular and includes a first upstream rail portion 182 extending parallel to the surface 131A of the unit conveying section 131, and a first downstream rail portion 183 extending downstream from the first upstream rail portion 182 and sloping downward as it moves away from the first upstream rail portion 182.

[0042] The second guide rail 191 is annular and includes a second upstream rail portion 192 that is disposed at the same position as the first upstream rail portion 182 in the conveying direction, and a second downstream rail portion 193 that is disposed at the same position as the first downstream rail portion 183 in the conveying direction. The second upstream rail portion 192 extends parallel to the first upstream rail portion 182 and is disposed at a position lower by the difference in the extension lengths of the pair of legs 151, 152. In contrast, the second downstream rail portion 193 extends parallel to the first downstream rail portion 183 and is disposed at the same height. The first upstream rail portion 182 and the second upstream rail portion 192 are disposed opposite the heat pressing unit 50 and the peeling unit 70.

[0043] In the first state, as shown in Figure 8, of the multiple unit conveying sections 131, each of the legs 151 of two adjacent unit conveying sections 141, 142 is supported by the first upstream rail section 182, and each of the legs 152 of the two unit conveying sections 141, 142 is supported by the second upstream rail section 192, so that the surface 142A of the unit conveying section 142 is parallel to the surface 141A of the unit conveying section 141 and is at the same height.

[0044] In contrast, in the second state, as shown in Figure 9, the leg 151 of the unit conveying section 141, which is located upstream of the two unit conveying sections 141, 142, is supported by the first upstream rail section 182, and the leg 152 of the unit conveying section 141 is supported by the second upstream rail section 192, and the leg 151 of the unit conveying section 142 is supported by the first downstream rail section 183, and the leg 152 of the unit conveying section 142 is supported by the second downstream rail section 193, so that the surface 141A of the unit conveying section 141 is parallel to the surface 142A of the unit conveying section 142 and is located at a lower position.

[0045] As a result, in this embodiment, as shown in Fig. 8, after the hot pressing step is performed in the first state, the two unit conveying parts 141, 142 with the first layer 21 welded together can be displaced along both the first guide rail 181 and the second guide rail 191 to pass under the peeling section 70 and then transition to the second state as shown in Fig. 9, making it easier to separate the first layer 21 from the unit conveying parts 142. Note that because the first guide rail 181 and the second guide rail 191 are annular, the two unit conveying parts 141, 142 in the second state can again reach the first upstream rail part 182 and the second upstream rail part 192 in the process of being displaced along the first guide rail 181 and the second guide rail 191, and return to the first state.

[0046] Next, the effects of this embodiment will be described. According to this embodiment, by displacing the plurality of unit conveyance units 131 along both the first guide rail 181 and the second guide rail 191, it is possible to change the state of two adjacent unit conveyance units 141, 142 from a first state to a second state. More specifically, in the first state, as shown in FIG. 8 , both of the two unit conveyance units 141, 142 are supported by the first upstream rail portion 182 and the second upstream rail portion 192. Here, of the two legs 151, 152 that the unit conveyance unit 131 has, the leg 151 that is located on the upstream side is set to have a shorter extension length from the unit conveyance unit 131 than the leg 152. The second upstream rail portion 192 that supports the leg 152 is positioned lower than the first upstream rail portion 182 that supports the leg 151 by the difference in the extension lengths of the legs 151, 152. Therefore, in the first state, the surface 142A of the unit conveying section 142 is parallel to the surface 141A of the unit conveying section 141 and is disposed at the same height.

[0047] 9, the upstream unit conveyance section 141 is supported by the first upstream rail section 182 and the second upstream rail section 192, and the downstream unit conveyance section 142 is supported by the first downstream rail section 183 and the second downstream rail section 193. The first downstream rail section 183 extends in a manner that slopes downward as it moves away from the first upstream rail section 182, and the second downstream rail section 193 is disposed parallel to the first downstream rail section 183. In other words, the second downstream rail section 193 also extends in a manner that slopes downward as it moves away from the first upstream rail section 182. Therefore, the unit conveyance section 142 is disposed at a lower position than the unit conveyance section 141.

[0048] Second downstream rail portion 193 supporting leg portion 152 is disposed at the same height as first downstream rail portion 183 supporting leg portion 151. Leg portion 151 has a shorter extension length than leg portion 152, and therefore in the second state, surface 142A of unit conveyance portion 142 is disposed in a shape that inclines upward as it moves downstream relative to the extension direction of first downstream rail portion 183 and second downstream rail portion 193. As a result, in the second state, unit conveyance portion 142 is configured to be disposed at a lower position relative to unit conveyance portion 141, while surface 142A of unit conveyance portion 142 can be disposed so as to be parallel to surface 141A of unit conveyance portion 141.

[0049] <Other embodiments> The technology disclosed in this specification is not limited to the embodiments described above and illustrated in the drawings, and the following embodiments, for example, are also included in the technical scope. (1) In the above embodiment, the laminate has a four-layer structure, but the laminate is not limited to this and may have at least two layers. (2) In the above embodiment, the laminate is an offcut generated during the production of a vehicle interior material, but is not limited thereto. For example, the laminate may be the vehicle interior material itself, or a component part provided in the interior material (for example, a sound-absorbing material or a cushioning material provided in a door trim, etc.). [Explanation of symbols]

[0050] 10,110... peeling device, 20... laminate, 21... first layer, 22... second layer, 31,131... unit conveying section, 30,130... conveying section, 31A,131A... surface of unit conveying section, 41,141... one unit conveying section, 41A,141A... surface of one unit conveying section, 42,142... other unit conveying section, 42A,142A... surface of other unit conveying section, 50... heat pressing section, 70... peeling section, 80,180... state changing section, 81... actuator, 151... one leg section, 152... other leg section, 181... first guide rail, 182... first upstream rail section, 183... first downstream rail section, 191... second guide rail, 192... second upstream rail section, 193... second downstream rail section

Claims

1. a conveying section that conveys a laminate including a first layer containing a thermoplastic resin and a second layer, and that includes a plurality of unit conveying sections that are arranged along a conveying direction of the laminate; a heat press unit that heats and presses the laminate conveyed by the conveying unit to weld the first layer to each surface of the plurality of unit conveying units; a peeling unit that is disposed downstream of the heat press unit in a conveying direction of the laminate by the conveying unit and peels the second layer from the first layer; A peeling device comprising a state change unit that can change between a first state in which the surface of one unit conveying unit and the surface of the other unit conveying unit are at the same height in two adjacent unit conveying units among the plurality of unit conveying units, and a second state in which a step is generated between the surface of the one unit conveying unit and the surface of the other unit conveying unit.

2. The peeling device according to claim 1 , wherein the state changing unit is an actuator capable of moving the one unit transport unit up and down.

3. the state changing unit includes a first guide rail and a second guide rail extending along a conveying direction of the stack, and a pair of legs extending downward from each of the plurality of unit conveying units and aligned along the conveying direction, the first guide rail and the second guide rail are arranged side by side in a direction perpendicular to the conveying direction, one of the pair of legs arranged on the upstream side in the conveying direction is set to have a shorter extension length from the unit conveying unit than the other leg, each of the plurality of unit conveying units is displaceable along both the first guide rail and the second guide rail in a state in which the one leg portion is supported by the first guide rail and the other leg portion is supported by the second guide rail; the first guide rail includes a first upstream rail portion extending parallel to a surface of the unit conveying portion, and a first downstream rail portion extending from the first upstream rail portion to the downstream side and extending in a manner that slopes downward as it moves away from the first upstream rail portion, the second guide rail includes a second upstream rail portion disposed at the same position as the first upstream rail portion in the conveying direction, and a second downstream rail portion disposed at the same position as the first downstream rail portion in the conveying direction, the second upstream rail portion extends parallel to the first upstream rail portion and is positioned lower than the first upstream rail portion by an amount corresponding to a difference in extension lengths of the pair of legs, The second downstream rail portion extends parallel to the first downstream rail portion and is disposed at the same height as the first downstream rail portion, In the first state, each of the one leg portions of the two unit conveying units is supported by the first upstream rail portion, and each of the other leg portions of the two unit conveying units is supported by the second upstream rail portion, so that the surface of the other unit conveying unit is parallel to the surface of the one unit conveying unit and is arranged at the same height, 2. The peeling device of claim 1, wherein in the second state, one of the legs of one of the two unit conveying sections located upstream is supported on the first upstream rail section, and the other leg of one of the unit conveying sections is supported on the second upstream rail section, and one of the legs of the other unit conveying section is supported on the first downstream rail section, and the other leg of the other unit conveying section is supported on the second downstream rail section, so that the surface of the other unit conveying section is parallel to the surface of one of the unit conveying sections and is positioned at a lower position.

4. a heat pressing process in which a laminate including a first layer containing a thermoplastic resin and a second layer is conveyed by a conveying section including a plurality of unit conveying sections, while heating and pressing the laminate, thereby welding the first layer to each surface of the plurality of unit conveying sections arranged in a conveying direction of the laminate; a peeling step, which is performed after the heat pressing step, of peeling the second layer from the first layer; A method for peeling off a laminate, comprising: a step forming process that is performed after the peeling process and that creates a step between the surface of one unit conveying section and the surface of the other unit conveying section in two adjacent unit conveying sections among the plurality of unit conveying sections.

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