Protective seal stripping method and protective seal stripping device

Abstract

The invention provides a method for peeling a protective seal and a peeling device used in the method, wherein the protective seal with strong adhesion can be easily peeled by a simpler device. The method for peeling the protective seal is a method for peeling the protective seal from a protective workpiece in which the surface of the workpiece body is protected by the protective seal, and is provided with: a first step for pressing an adhesive tape sheet having an adhesive surface by means of a rotating roller; and a second step for holding the adhesive tape sheet on the roller surface of the rotating roller such that the adhesive surface is positioned on the outside, pressing the rotating roller holding the adhesive tape sheet against one end of the protective seal of the protective workpiece and attaching the adhesive surface of the adhesive tape sheet, and rotating the rotating roller in the reverse direction toward the other end of the protective seal. The protective seal is rolled up from the surface of the workpiece body. In addition, the peeling device is provided with the following components: a rotatable rotating roller which is provided with a roller surface with adhesive force; and a rotation restricting portion that restricts the rotation of the rotating roller.

Description

Technical Field

[0001] The present invention relates to a method for peeling off a protective seal from a workpiece whose surface is protected by the protective seal, and a device for peeling off the protective seal used in the method. Background Art

[0002] Glass films applied to smartphone LCD screens to protect them from damage, and semiconductor wafers used in semiconductor manufacturing processes, are traded with the surface of the glass films or semiconductor wafers protected by protective seals. These, and other protective seals, are widely used to protect the surfaces of electronic devices, electronic components, various substrates, and plate materials.

[0003] When using a component with a protective seal, it is necessary to remove the seal. Therefore, methods for removing protective seals are being extensively studied in the manufacturing processes of semiconductors and industrial products. Typically, protective seals adhere closely to the component, with the same size and shape as the component being protected. Therefore, mechanically removing them requires various considerations, including the device structure.

[0004] For example, a method is disclosed in which a hollow tube having an opening connecting the interior space and the exterior is used as a vacuum roller. The protective seal is sucked while the interior space is evacuated. The seal body to which the protective seal is affixed is moved to wrap the protective seal around the hollow tube, thereby peeling off the protective seal (see Patent Document 1).

[0005] In addition, a method is disclosed in which an adhesive tape is attached to one end of a protective film on a substrate surface so as to protrude toward the outside of the substrate, the protruding portion of the adhesive tape is detected by a sensor, and the adhesive tape is pulled while sucking the protruding portion with a suction drum, thereby peeling the protective film from the substrate surface (see Patent Document 2).

[0006] In addition, the following method is disclosed: the end of the adhesive tape pulled out from the adhesive tape roll is attached to the end edge of the covering film in close contact with the surface of the plate, and after pressing the attached portion with another mechanism, the rotation of the adhesive tape roll is restrained and the adhesive tape roll is retracted, thereby peeling the covering film from the surface of the plate (see Patent Document 3).

[0007] In addition, the following method is disclosed: when peeling off a covering sheet adhered to the surface of a plate from the surface of the plate together with an adhesive tape, an adhesive tape having an adhesive surface on at least one side is attached in a state where it is exposed from the end of the plate and in a direction intersecting with the conveying direction of the plate, and after pressing the exposed portion of the adhesive tape to make it adhere, a winding mechanism is swung in a direction in which the covering sheet is peeled off from the surface of the plate to thereby wind up the covering sheet (see Patent Document 4).

[0008] Furthermore, a peeling device is disclosed, which comprises a supply unit for supplying a rolled adhesive tape, a reciprocating component capable of unwinding the adhesive tape from the supply unit, and a winding unit for winding up the unwound adhesive tape. The winding unit comprises a torque motor having a braking function for limiting the rotation of a winding reel and a supply reel on which the adhesive tape is wound. By operating the braking component to impose a rotation restriction on the adhesive tape supply reel while rotating the torque motor until a set torque is reached, an amount of adhesive tape equivalent to the unwound length of the adhesive tape unwound from the supply reel, i.e., the slack of the adhesive tape, is wound up approximately accurately, thereby eliminating waste of the adhesive tape and peeling off the protective seal (see Patent Document 5).

[0009] Furthermore, a method is disclosed in which, when peeling off a protective seal protecting the surface of a polarizing plate constituting a liquid crystal display panel, a label is attached to a corner portion of the protective seal, the label is clamped and pulled, and a static-eliminating substance is supplied between the protective seal and the polarizing plate, thereby facilitating peeling off the protective seal (see Patent Document 6).

[0010] Prior art literature

[0011] Patent Literature

[0012] Patent Document 1: Japanese Patent Application Laid-Open No. 2004-338871

[0013] Patent Document 2: Japanese Patent Application Laid-Open No. 52-16538

[0014] Patent Document 3: Japanese Patent Application Laid-Open No. 3-61261

[0015] Patent Document 4: Japanese Patent Application Laid-Open No. 10-167560

[0016] Patent Document 5: Japanese Patent Application Laid-Open No. 2020-33171

[0017] Patent Document 6: Japanese Patent Application Laid-Open No. 2007-25651 Summary of the Invention

[0018] Problems to be solved by the invention

[0019] When peeling a protective seal from a protected workpiece protected by the protective seal on the surface of the workpiece body, the methods can be roughly divided into a method in which the protective seal is directly held and peeled off using a hollow tube, as in Patent Document 1 (a direct method), and a method in which a member such as a label or adhesive tape is attached to the protective seal, clamped, etc., and peeled off (an indirect method), as in Patent Documents 2 to 6.

[0020] The former direct method, while relatively simple in structure, can sometimes be difficult to remove if the seal adheres strongly to the workpiece. Furthermore, the latter indirect method can remove even relatively strong seals, but the device structure is complex, and the removal process itself becomes cumbersome.

[0021] Therefore, the inventors conducted in-depth research on a method for easily peeling off a protective seal with strong adhesion using a simpler device. As a result, they found that by pressing an adhesive tape sheet having an adhesive surface with a rotating roller and rotating it, with the adhesive surface facing outward while the adhesive tape sheet is held by the roller surface of the rotating roller, the adhesive surface of the adhesive tape sheet is adhered to the protective seal, and the rotating roller is rotated toward the other end of the protective seal. In this way, even a protective seal with strong adhesion can be reliably peeled off from the surface of the workpiece body, thereby completing the present invention.

[0022] Therefore, an object of the present invention is to provide a method for peeling off a protective seal that can easily peel off a protective seal having a strong adhesive force using a simpler device.

[0023] Another object of the present invention is to provide a protective seal peeling device capable of peeling a protective seal having a strong adhesion force more simply and reliably.

[0024] Solutions to Problems

[0025] That is, the present invention is a method for peeling off a protective seal, which is a method for peeling off a protective seal from a workpiece whose surface is protected by the protective seal, and is characterized in that:

[0026] The peeling method of the protective seal comprises:

[0027] A first step comprises pressing an adhesive tape piece having an adhesive surface with a rotating roller and rotating the rotating roller to hold the adhesive tape piece on the roller surface of the rotating roller with the adhesive surface facing outward; and

[0028] In the second step, a rotating roller holding an adhesive tape sheet is pressed against one end of a protective seal protecting the workpiece so that the adhesive surface of the adhesive tape sheet adheres to the workpiece, and the rotating roller is rotated to stick the adhesive tape sheet to the protective seal. Thereafter, the rotating roller is rotated in the opposite direction toward the other end of the protective seal to roll up the protective seal from the surface of the workpiece body.

[0029] Furthermore, the present invention is a device for peeling off a protective seal, which is used for peeling off a protective seal from a workpiece whose surface is protected by the protective seal, and is characterized in that:

[0030] The peeling device of the protective seal comprises:

[0031] A rotating roller that rotates freely and has an adhesive roller surface; and

[0032] a rotation limiting portion for limiting the rotation of the rotating roller;

[0033] The adhesive tape piece having the adhesive surface is pressed by the rotating roller and rotated so that the adhesive tape piece is held on the roller surface of the rotating roller with the adhesive surface facing outward, and then the rotation of the rotating roller is restricted by the rotation restriction portion.

[0034] Next, the rotating roller holding the adhesive tape is pressed against one end of the protective seal protecting the workpiece so that the adhesive surface of the adhesive tape adheres to it. The restriction of the rotating roller by the rotation limiting portion is released, and the rotating roller is rotated to stick the adhesive tape to the protective seal. Thereafter, the rotating roller is rotated in the opposite direction toward the other end of the protective seal to roll up the protective seal from the surface of the workpiece body.

[0035] First, the protective seal removal method of the present invention includes a first step of bringing a rotating roller into contact with an adhesive tape sheet having an adhesive surface. The rotating roller is then rotated while pressing the adhesive tape sheet with the rotating roller, thereby holding the adhesive tape sheet on the roller surface with the adhesive tape facing outward. The adhesive tape sheet used herein only needs to have an adhesive surface on at least one side. Preferably, the adhesive tape sheet is a tape substrate composed of paper, resin, or the like, with an adhesive surface applied to one side of the tape substrate. Furthermore, in this first step, the rotating roller is preferably pressed against the tape substrate side of the adhesive tape sheet and rotated, thereby holding the adhesive tape sheet on the roller surface with the adhesive surface of the tape substrate facing outward.

[0036] When the adhesive tape sheet is held against the roller surface by pressure using a rotating roller, adhesive force can be applied to the rotating roller side, or to one side of the adhesive tape. Specifically, in the former case, adhesive force is applied to the rotating roller side, and a rotating roller having an adhesive roller surface on a portion or the entire surface is used. In the latter case, adhesive force can be applied to the opposite side of the tape substrate having the adhesive surface. Preferably, a rotating roller having an adhesive roller surface can be used, as in the former case.

[0037] Specifically, part or all of the roller surface of the rotating roller is composed of a self-adhesive adhesive material. Preferred examples of such self-adhesive adhesive materials include materials made of resins such as silicone rubber, ethylene-propylene-diene rubber (EPDM), butyl rubber, fluorine-based resins, polyurethane resins, and acrylic resins. Of these, self-adhesive adhesive materials that generate van der Waals forces, a type of intermolecular force, at the interface with the workpiece to be adhered and retained are preferred.

[0038] Next, in the second step, a rotating roller is pressed against one end of the protective seal protecting the workpiece, causing the adhesive surface of the adhesive tape to adhere. The rotating roller is then rotated to adhere the adhesive tape to the surface of the protective seal. The rotating roller is then rotated in the opposite direction toward the other end of the protective seal, unwinding (peeling) the protective seal from the workpiece surface. This keeps the adhesive tape in close contact with the rotating roller and securely in place.

[0039] In this way, by rotating a rotating roller, with the adhesive tape piece held on its surface, while rolling against the surface of the workpiece to be protected and rotating toward the other end of the protective seal, the protective seal can be peeled from the workpiece, starting with the adhesive tape piece. Furthermore, because the circumferential (tangential) force acting on the adhesive tape piece and the protective seal, combined with the winding force of the rotating roller, acts on the adhesive tape piece and the protective seal, the adhesive tape piece and the protective seal adhere closely to (and are wound around) the rotating roller. This allows for reliable peeling of the protective seal from the workpiece, even with a protective seal that has a strong adhesion to the workpiece itself, without the adhesive tape piece peeling off from the rotating roller at the start of peeling. Furthermore, because the adhesive tape piece attached to one end of the protective seal was held on the roller surface by pressing and rotating the rotating roller in the previous first step, both the adhesive tape piece and the protective seal can be retained and peeled with a simple device structure.

[0040] Furthermore, in the present invention, the protective seal stripped in the second step can be recovered from the rotating roller in a third step. Specifically, in the third step, a clamping member is positioned near the rotating roller to press against the roller surface of the rotating roller, and a protective seal recovery station is provided to recover the protective seal stripped in the second step. Then, while the clamping member holds the protective seal stripped in the second step against the roller surface, the rotating roller is pressed against the protective seal recovery station to adhere the back of the protective seal. Depending on the situation, the clamping member releases the hold, and the rotating roller is rotated in the opposite direction to that of the second step, peeling the protective seal, along with the adhesive tape, from the roller surface of the rotating roller and recovering it at the protective seal recovery station. By clamping the protective seal stripped in the second step with the clamping member upon completion of the stripping process, the protective seal wound around the rotating roller can be maintained in its wound state, even if the adhesive strength of the back of the protective seal is weak.

[0041] This allows the first step to be repeated, allowing the protective seal to be peeled off from the protected workpiece. Furthermore, this process of collecting the protective seal can be repeated. After the initial protective seal is collected by the protective seal collection station, the next protective seal can be collected by stacking it on top of the collected protective seal. Furthermore, as described above, when collecting the protective seal from the rotating roller, if the adhesive strength of the back surface of the protective seal, which is in close contact with the workpiece body, is insufficient, additional adhesive strength can be applied to the protective seal collection station or the surface of the collected protective seal.

[0042] The peeling device for peeling the protective seal of the present invention is not particularly limited, but a peeling device including a rotatable roller having an adhesive roller surface and a rotation restricting portion for restricting the rotation of the roller can be preferably used.

[0043] In this peeling device, the adhesive tape sheet having an adhesive surface is first pressed against a rotating roller and rotated, holding the adhesive tape sheet against the roller surface with the adhesive surface facing outward. The rotation of the rotating roller is then restricted by the rotation restricting member. This corresponds to the first step in the protective seal peeling method described above.

[0044] Next, the rotating roller is pressed against one end of the protective seal, adhering the adhesive surface of the adhesive tape. After releasing the restraint on the rotating roller from the rotation limiter, the rotating roller is rotated, adhering the adhesive tape to the surface of the protective seal. The protective seal is then unwound from the workpiece surface while the rotating roller rotates in the opposite direction toward the other end of the protective seal. This also corresponds to the second step.

[0045] Furthermore, the peeling device may further include a clamping member that presses against the roller surface of the rotating roller, corresponding to the third step. As the clamping member, a guide roller having a smaller roller diameter than the rotating roller and disposed near the rotating roller with the roller surfaces facing each other can be preferably used.

[0046] Furthermore, the peeling device may also include a rotation position sensor for detecting the rotation position of the rotating roller. For example, when adhesive force is imparted to a portion of the roller surface of the rotating roller to hold the adhesive tape, the rotation position sensor can be used to detect the adhesive area of ​​the roller surface.

[0047] The peeling device of the present invention preferably further comprises at least a vertical movement member capable of moving the rotating roller in the vertical direction, and a forward and backward movement member capable of similarly moving the rotating roller in the forward and backward direction. The vertical movement member enables the rotating roller to be pressed against the adhesive tape or protective seal protecting the workpiece. Furthermore, the forward and backward movement member enables the freely rotatable rotating roller to roll and rotate on the adhesive tape or protective seal.

[0048] These vertical and horizontal moving components can be utilized using existing industrial robots such as multi-jointed robots or orthogonal robots. For example, an orthogonal robot equipped with a movable axis (xy axis) that moves not only forward and backward but also left and right, and a movable axis (z axis) that moves up and down, can be combined with a peeling unit having a rotating roller or a rotation limiting portion to form a protective seal peeling device.

[0049] In the present invention, examples of protected workpieces from which protective seals can be removed include sheets made of glass or PET (polyethylene terephthalate), such as smartphone films applied to smartphone LCD screens to prevent screen damage and reflection, where the workpiece itself is protected by a protective seal. Other examples include, without particular limitation, substrates used in semiconductor manufacturing processes or LCD panel assembly, such as metal materials like aluminum or copper, resin components like acrylic or polycarbonate, and glass substrates, for electronic devices and electronic components. Furthermore, structures made of various sheet materials, such as glass lenses, with curved surfaces protected by a protective seal can also be removed according to the present invention.

[0050] Effects of the Invention

[0051] According to the present invention, even a protective seal with strong adhesion can be easily peeled off with a simpler device. In addition, since the device structure is simpler, it is easy to combine with existing robots, etc., and can be used to peel off protective seals on various protective workpieces, and has excellent versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 This is a perspective view illustrating a device for peeling off a protective seal according to the present invention.

[0053] Figure 2 This is a side view illustrating a device for peeling off a protective seal according to the present invention.

[0054] Figure 3 This is a diagram illustrating an adhesive tape sheet used in the method for peeling off a protective seal according to the present invention.

[0055] Figure 4 (1) to (3) are diagrams for explaining a state in which the adhesive tape piece is held on the roller surface of the rotating roller when the protective seal is peeled off from the protected workpiece.

[0056] Figure 5 It is a figure explaining the protected workpiece from which the protective seal is to be peeled off.

[0057] Figure 6 (a1) to (a3) ​​are diagrams illustrating a state in which an adhesive tape piece held by a rotating roller is attached to a protective seal that protects the surface of a workpiece.

[0058] Figure 7 (b1) to (b3) are the explanations of Figure 6 Continuing with the state of FIG, the protective seal is peeled off from the surface of the workpiece body.

[0059] Figure 8 (1) to (3) are diagrams illustrating a state in which the peeled protective seal is attached to the protective seal collection table using a rotating roller and collected.

[0060] Figure 9 This is a diagram for explaining a state where a protective seal is peeled off from a long protective workpiece and then wound up by a rotating roller.

[0061] Figure 10 (a) to (c) are diagrams showing an example of a state in which a non-adhesive region is formed on the adhesive surface side of the adhesive tape sheet.

[0062] Figure 11 This is a diagram for explaining a state in which an adhesion region is locally formed on the roller surface of a rotating roller.

[0063] Figure 12 (b1) to (b3) are diagrams illustrating a state in which a protective seal is peeled off from the surface of a workpiece main body having a curved surface. DETAILED DESCRIPTION

[0064] Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

[0065] Figure 1 、 Figure 2 A peeling device X1 is shown for peeling a protective seal from a protected workpiece (not shown) whose surface is protected by the protective seal.

[0066] The peeling device X1 includes: a rotating roller 1, which has a roller surface 1a with adhesive force; a push-pull solenoid-type rotation limiting part 2, which can press the end stopper against the roller surface 1a of the rotating roller 1 to limit the rotation of the rotating roller 1; a guide roller 3, which has a roller diameter smaller than that of the rotating roller 1 and has a roller surface 3a facing the roller surface 1a of the rotating roller 1; a guide roller pressing mechanism 4, which can press the roller surface 3a of the guide roller 3 against the roller surface 1a of the rotating roller 1 through the force of a spring (not shown); and a rotation position sensor 5, which can detect the rotation position of the roller surface 1a of the rotating roller 1. These components form a peeling unit.

[0067] The rotating roller 1 and guide roller 3 are each formed from a cylindrical aluminum member and are rotatable via rotating shafts 1b and 3b equipped with bearings. Furthermore, an adhesive holding material is adhered to the entire surface of the rotating roller 1a using an acrylic adhesive. This adhesive holding material exhibits an adhesive force based on van der Waals forces, enabling repeated attachment and detachment of the adhesive tape sheet, as described below.

[0068] The peeling unit is assembled on an orthogonal robot (not shown) having an xy axis movable forward, backward, left, and right and a z axis movable upward and downward, thereby constituting a peeling device X1 of the present invention.

[0069] To remove the protective seal from the protected workpiece using the peeling device X1, first, use Figure 3 The adhesive tape piece 6 shown is held on the roller surface of the rotating roller. That is, the adhesive tape piece 6 has an adhesive surface 6a coated with an adhesive on one side of a tape base material 6b, and the adhesive surface 6a is arranged on a release sheet 7 having releasability.

[0070] like Figure 4 As shown in (1), in a state where the rotation direction reference position (origin position) of the rotating roller 1 is detected by the rotation position sensor, the rotation of the rotating roller 1 is restricted by the rotation restriction portion. Figure 4 As shown in (2), an orthogonal robot (not shown) is used to move the peeling unit together, so that the roller surface 1a of the rotating roller 1 contacts and presses the edge of the adhesive tape sheet 6. Figure 4 As shown in (3), the restriction by the rotation restriction portion is released, and the rotating roller 1 is moved backward by the robot, thereby rotating the roller surface 1a toward the other end of the adhesive tape sheet 6. As a result, the adhesive surface 6a of the adhesive tape sheet 6 is transferred to the rotating roller 1 side while being peeled off from the release sheet 7. In this way, the adhesive tape sheet 6 can be held on the roller surface 1a of the rotating roller 1 with the adhesive surface 6a facing outward (first step). Thereafter, in preparation for the next step, the rotation of the rotating roller 1 is restricted by the rotation restriction portion. In addition, in this first step, when the adhesive force of the roller surface 1a of the rotating roller 1 is efficiently utilized, in order to change the rotational position of the adhesive tape sheet 6 held on the roller surface 1a of the rotating roller 1, the rotating roller 1 is rotated by a predetermined amount after the rotational reference position (origin position) of the rotating roller 1 is detected by the rotation position sensor 5. This prevents the adhesive tape sheet 6 from being adhered only to a specific location on the rotating roller 1, and prevents the adhesive force of the rotating roller 1 from being reduced.

[0071] Then, from Figure 5 When the protective seal 8b is peeled off from the workpiece 8 whose surface is protected by the protective seal 8b, first, Figure 6 As shown in (a1), the rotating roller 1 whose rotation is restricted by the rotation restricting portion is moved to the adhesive tape piece 6 held on the roller surface 1a by the robot to become the attachment start position of the protective seal 8b. Figure 6 As shown in (a2), the rotating roller 1 is pressed against one end of the protective seal 8b of the protective workpiece 8 so that the adhesive surface 6a of the adhesive tape piece 6 is attached. Figure 6 As shown in (a3), the restriction by the rotation restricting portion is released, and the robot moves the rotating roller 1 forward in the y direction and rotates it (arrow i in the figure), so that the adhesive tape piece 6 is attached to the peeling start position of the protective seal 8b.

[0072] After the adhesive tape 6 is attached to the protective seal 8b, Figure 7 From the state shown in (b1), the rotation roller 1 is moved backward in the y direction while the restriction by the rotation restriction portion is released, so that the rotation roller 1 moves toward the other end of the protective seal 8b in the direction opposite to the previous direction. Figure 6 (a3) is rotated in the opposite direction (arrow ii in the figure). Figure 7 As shown in (b3), while rolling up the protective seal 8b from the surface of the workpiece body 8a, the protective seal 8b, along with the adhesive tape 6, is rolled onto the roller surface 1a of the rotating roller 1, thereby peeling the protective seal 8b from the protected workpiece 8 (second step). Subsequently, in preparation for the next step, the rotation of the rotating roller 1 is restricted by the rotation restriction unit.

[0073] Furthermore, a protective seal collection station is prepared for collecting the peeled protective seal 8b, and the peeled protective seal 8b can be collected using the protective seal collection station.

[0074] First, if Figure 8 As shown in (1), while the rotation of the rotating roller 1 is restricted by the rotation restricting portion, the guide roller 3 holds the peeled protective seal 8b between the roller surface 1a of the rotating roller 1. At this time, if the protective seal 8b is firmly attached, the guide roller pressing mechanism 4 may press the roller surface 3a of the guide roller 3 against the roller surface 1a of the rotating roller 1.

[0075] Then, if Figure 8 As shown in (2), the rotating roller 1 is pressed against the prepared protective seal collecting table 9 and the back of the protective seal 8b is attached. Figure 8 As shown in (3), the restriction by the rotation restriction portion is released, and the rotating roller 1 is moved forward in the y direction in the opposite direction to that in which the protective seal 8b was peeled off and rotated (arrow i in the figure), thereby attaching the protective seal 8b to the protective seal collection table 9 (third step). At this time, if the adhesive force of the protective seal 8b peeled off from the protected workpiece 8 is insufficient for adhesion, an adhesive or the like may be applied to the surface of the protective seal collection table 9 to impart adhesive force, or an adhesive sheet may be provided.

[0076] In this way, the protective seal 8b can be peeled off from the roller surface 1a of the rotating roller 1 along with the adhesive tape 6 and recovered. Therefore, the process can be returned to the first step and the protective seal 8b can be repeatedly peeled off from another protected workpiece 8. Furthermore, the protective seal 8b that has been peeled off again can be re-applied to the previously recovered protective seal using the protective seal recovery table 9, or another protective seal recovery table can be prepared for recovery.

[0077] The adhesive tape sheet 6 and the protective workpiece 8 may be fixed to the protective seal collecting station 9 by using a vacuum adsorption device or an electrostatic adsorption device (not shown).

[0078] Alternatively, a friction-type slip clutch or the like can be used to impart torque to the freely rotatable rotating roller 1. Specifically, when rotating the rotating roller 1 to hold the adhesive tape sheet on the roller surface or to remove the protective seal 8b, applying a constant force (tension) in the direction of rotation can absorb variations (unevenness) in the adhesion of the adhesive tape sheet 6 to the release sheet 7, variations (unevenness) in the adhesion of the protective seal 8b to the protected workpiece 8, variations (unevenness) in the adhesion of the roller surface 1a of the rotating roller 1, and variations (unevenness) in the moving speed of the rotating roller 1, thereby more reliably maintaining the adhesive tape sheet or removing the protective seal 8b.

[0079] On the other hand, Figure 9 As shown in FIG. 1 , even when the workpiece 8 protected by the protective seal 8b is a long object and the protective seal 8b wound on the rotating roller 1 overlaps the remaining adhesive surface 6a of the adhesive tape 6, the overlapping portion can be processed as a non-adhesive area in advance. For example, Figure 10 As shown in (a), in addition to locally providing the adhesive surface 6a by limiting the adhesive applied to one side of the tape base material 6b, it is also possible to Figure 10 As shown in (b), a sealing material 6c is attached to a portion of the adhesive surface 6a, or as shown in Figure 10 As shown in (c), the tape base material 6b is folded back onto the adhesive surface 6a to form a non-adhesive area.

[0080] When imparting adhesive force to the rotating roller 1, the adhesive holding material may be attached to the entire roller surface 1a so that the adhesive force acts on the entire roller surface 1a, or the adhesive holding material may be attached to a portion of the roller surface 1a, such as Figure 11 As shown, a localized adhesive region 1c is provided. This localized adhesive force prevents the protective seal 8b, which has rolled up after peeling, from adhering to the roller surface 1a of the rotating roller 1, thereby facilitating the recovery of the protective seal 8b in the third step described above. Furthermore, when the adhesive force is generated locally on the roller surface 1a of the rotating roller 1, the rotational position sensor 5 detects the rotational reference position (origin position) of the rotating roller 1, calculates the rotational distance from the previously known rotational reference position to the adhesive region 1c, and then rotates the roller 1 to adhere the adhesive tape 6 to the adhesive region 1c.

[0081] In addition, the peeling device X1 is not limited to workpieces with flat surfaces, but can also be applied to workpieces with curved surfaces. Figure 12 (b1)~(b3) show that it can be used in the same way as before. Figure 7 In the cases (b1) to (b3), the protective seal 8b protecting the surface of the workpiece main body 8a having a curved surface is peeled off in the same manner.

[0082] In summary, the present invention enables even highly adhesive protective seals to be easily removed from a workpiece using a simpler device structure. In particular, the present invention's relatively simple device structure allows for integration with existing robots and other devices, allowing for the removal of protective seals from a variety of workpieces, demonstrating excellent versatility.

[0083] Description of Reference Signs

[0084] 1: Rotating roller, 1a: Roller surface, 2: Rotation limiting portion, 3: Guide roller, 3a: Roller surface, 4: Guide roller pressing mechanism, 5: Rotation position sensor, 6: Adhesive tape sheet, 6a: Adhesive surface, 6b: Tape substrate, 7: Release sheet, 8: Protective workpiece, 8a: Workpiece body, 8b: Protective seal, 9: Protective seal recovery station.

Claims

1. A method for peeling off a protective seal, which is a method for peeling off a protective seal from a workpiece whose surface is protected by the protective seal, characterized in that: The peeling method of the protective seal comprises: A first step comprises pressing an adhesive tape piece having an adhesive surface with a rotating roller and rotating the rotating roller to hold the adhesive tape piece on the roller surface of the rotating roller with the adhesive surface facing outward; and In the second step, a rotating roller holding an adhesive tape sheet is pressed against one end of a protective seal protecting the workpiece so that the adhesive surface of the adhesive tape sheet adheres to the workpiece, and the rotating roller is rotated to stick the adhesive tape sheet to the protective seal. Thereafter, the rotating roller is rotated in the opposite direction toward the other end of the protective seal to roll up the protective seal from the surface of the workpiece body.

2. The method for peeling off the protective seal according to claim 1, characterized in that: The method for peeling off the protective seal further includes a third step, in which a clamping member is provided near the rotating roller to press on the roller surface of the rotating roller, and a protective seal recovery station is prepared for recovering the protective seal peeled off in the second step. While the protective seal peeled off in the second step is held on the roller surface of the rotating roller by the clamping member, the rotating roller is pressed against the protective seal recovery station to adhere to the back side of the protective seal, the rotating roller is rotated in a direction opposite to that of the second step, and the peeled protective seal is recovered by the recovery station.

3. The method for peeling off the protective seal according to claim 1, characterized in that: The adhesive tape sheet has an adhesive surface on one side of the tape substrate, and the rotating roller has an adhesive roller surface. In the first step, the adhesive tape sheet is held by pressing the roller surface of the rotating roller against the tape substrate and rotating the rotating roller.

4. A device for peeling off a protective seal, used for peeling off a protective seal from a workpiece whose surface is protected by the protective seal, characterized in that: The peeling device of the protective seal comprises: A rotating roller that rotates freely and has an adhesive roller surface; and a rotation limiting portion for limiting the rotation of the rotating roller; The adhesive tape piece having the adhesive surface is pressed by the rotating roller and rotated so that the adhesive tape piece is held on the roller surface of the rotating roller with the adhesive surface facing outward, and then the rotation of the rotating roller is restricted by the rotation restriction portion. Next, the rotating roller holding the adhesive tape is pressed against one end of the protective seal protecting the workpiece so that the adhesive surface of the adhesive tape adheres to it. The restriction of the rotating roller by the rotation limiting portion is released, and the rotating roller is rotated to stick the adhesive tape to the protective seal. Thereafter, the rotating roller is rotated in the opposite direction toward the other end of the protective seal to roll up the protective seal from the surface of the workpiece body.

5. The peeling device for the protective seal according to claim 4, characterized in that: The protective seal peeling device further includes a clamping member that is pressed against a roller surface of the rotating roller.

6. The peeling device for the protective seal according to claim 4 or 5, characterized in that: The protective seal peeling device further includes: a front-rear moving member that moves the rotating roller in the front-rear direction; and a vertical moving member that moves the rotating roller in the vertical direction.

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