Tape application device

Abstract

The technical concept of the present invention is to provide a tape attachment device. The tape attachment device is configured to attach a first tape to a first surface of a workpiece and a second tape to a second surface of the workpiece. The tape attachment device includes a tape holder configured to attach the center of the first tape and the center of the second tape to the workpiece, respectively, and to attach the outer edge of the first tape to the outer edge of the second tape, the tape holder including a first holder that supports the first tape and a second holder that supports the second tape.

Description

Technical Field

[0001] The present invention relates to a tape attaching apparatus.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2024-0021738 filed on February 15, 2024, and all contents disclosed in the literature of said Korean patent application are incorporated as a part of the present specification.

Background Art

[0003] With technological development and increasing demand for mobile devices, the demand for secondary batteries is also rapidly increasing. Among them, lithium secondary batteries are widely used as an energy source not only for various mobile devices but also for various electronic products because of their high energy density, high operating voltage, and excellent storage and lifespan characteristics. In recent years, as application fields for secondary batteries have expanded, demand for higher-capacity secondary batteries has increased sharply. In such secondary batteries, a taping operation of attaching a protective tape to the secondary battery is performed to improve the safety of the secondary battery.

Summary of the Invention

Problem to be Solved by the Invention

[0004] The technical problem to be achieved by the present invention is to provide a tape attaching apparatus.

Means for Solving the Problem

[0005] To solve the above-mentioned problems, the technical concept of the present invention provides a tape attachment device configured to attach a first tape to a first surface of a workpiece and a second tape to a second surface of the workpiece, comprising a first holder for supporting the first tape and a second holder for supporting the second tape, wherein the tape holder is configured to attach the center of the first tape and the center of the second tape to the workpiece, and the outer edge of the first tape to the outer edge of the second tape, wherein the first holder comprises a central part for supporting the center of the first tape and an outer edge for supporting the outer edge of the first tape, wherein the second holder comprises a central part for supporting the center of the second tape and an outer edge for supporting the outer edge of the second tape, and the support surface of the outer edge of the first holder includes a portion that protrudes from the support surface of the central part of the first holder.

[0006] In an exemplary embodiment, the support surface of the central part of the first holder is characterized by having a greater degree of flatness than the support surface of the outer part of the first holder.

[0007] In an exemplary embodiment, the support surface of the outer casing of the second holder is characterized by including a portion that protrudes from the support surface of the central part of the second holder.

[0008] In an exemplary embodiment, the support surface of the central part of the second holder is characterized by having a greater degree of flatness than the support surface of the outer part of the second holder.

[0009] In an exemplary embodiment, the support surface of the outer casing of the first holder includes a plurality of first protrusions, and the support surface of the outer casing of the second holder includes a plurality of second protrusions.

[0010] In an exemplary embodiment, the plurality of first protrusions are not aligned perpendicularly to the plurality of second protrusions.

[0011] In an exemplary embodiment, the support surface of the outer casing of the first holder includes a plurality of first protrusions, the support surface of the outer casing of the second holder includes a plurality of grooves, and the plurality of first protrusions are each aligned perpendicularly to the corresponding groove among the plurality of grooves.

[0012] In an exemplary embodiment, the outer casing of the first holder is characterized by including a first foam pad that contacts the first tape.

[0013] In an exemplary embodiment, the outer casing of the second holder is characterized by including a second foam pad that contacts the second tape.

[0014] In an exemplary embodiment, at least one of the outer casing of the first holder and the outer casing of the second holder is characterized by including a heater.

[0015] To solve the above-mentioned problems, the technical concept of the present invention provides a tape attachment device configured to attach a first tape to a first surface of a workpiece and a second tape to a second surface of the workpiece, comprising a first holder for supporting the first tape and a second holder for supporting the second tape, wherein the tape holder is configured to attach the center of the first tape and the center of the second tape to the workpiece, and the outer edge of the first tape to the outer edge of the second tape, and the first holder comprises a first center block for supporting the center of the first tape and a first outer block for supporting the outer edge of the first tape, wherein the first center block and the first outer block are configured to move independently.

[0016] In exemplary embodiments, the first pressing device is further characterized by being configured to pressurize the first outer block toward the second holder.

[0017] In an exemplary embodiment, the first outer block is characterized by including a first heater.

[0018] In an exemplary embodiment, the second holder includes a second central block that supports the central part of the second tape and a second outer block that supports the outer part of the second tape, wherein the second central block and the second outer block are configured to move independently.

[0019] In an exemplary embodiment, the first outer block includes a first heater, and the second outer block includes a second heater. [Effects of the Invention]

[0020] According to an exemplary embodiment of the present invention, the adhesive pressure between the first tape and the second tape in the section where the first tape and the second tape are directly bonded together can be strengthened.

[0021] According to an exemplary embodiment of the present invention, the workpiece may be the joint between the electrode tabs and electrode leads of a battery cell joined by welding, and the first and second tapes can be attached to the joint between the electrode tabs and electrode leads of the battery cell and configured to protect the joint between the electrode tabs and electrode leads of the battery cell. Since the adhesion between the first and second tapes is strengthened, damage to the battery cell due to poor adhesion between the first and second tapes can be prevented, and ultimately the reliability of the battery cell can be improved.

[0022] The effects obtained from exemplary embodiments of the present invention are not limited to those mentioned above, and other effects not mentioned can be clearly derived and understood by a person ordinary in the art to which the exemplary embodiments of this disclosure belong from the following description. That is, unintended effects associated with carrying out exemplary embodiments of this disclosure can also be derived by a person ordinary in the art to which the exemplary embodiments of this disclosure belong from the exemplary embodiments of this disclosure. [Brief explanation of the drawing]

[0023] [Figure 1a] It is a cross-sectional view showing a tape attaching apparatus according to an exemplary embodiment of the present invention. [Figure 1b] It is a cross-sectional view showing a tape attaching apparatus according to an exemplary embodiment of the present invention. [Figure 2a] It is a cross-sectional view showing a tape attaching apparatus according to an exemplary embodiment of the present invention. [Figure 2b] It is a cross-sectional view showing a tape attaching apparatus according to an exemplary embodiment of the present invention. [Figure 3a] It is a cross-sectional view showing a tape attaching apparatus according to an exemplary embodiment of the present invention. [Figure 3b] It is a cross-sectional view showing a tape attaching apparatus according to an exemplary embodiment of the present invention. [Figure 4a] It is a cross-sectional view showing a tape attaching apparatus according to an exemplary embodiment of the present invention. [Figure 4b] It is a cross-sectional view showing a tape attaching apparatus according to an exemplary embodiment of the present invention. [Figure 5a] It is a cross-sectional view showing a tape attaching apparatus according to an exemplary embodiment of the present invention. [Figure 5b] It is a cross-sectional view showing a tape attaching apparatus according to an exemplary embodiment of the present invention. MODE FOR CARRYING OUT THE INVENTION

[0024] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. As a premise, terms and words used in the present specification and claims should not be construed as being limited to their ordinary or dictionary meanings, and may be interpreted as meanings and concepts consistent with the technical idea of the present invention based on the principle that the inventor can properly define the concept of terms in order to describe the inventor's own invention in the best manner.

[0025] Accordingly, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiment of the present invention, and do not represent all the technical ideas of the present invention. Therefore, various equivalents and modifications that can substitute for these are possible as of the filing date of the present application.

[0026] Furthermore, in describing the present invention, if it is determined that a specific description of a related known configuration or function may obscure the gist of the present invention, such detailed description will be omitted.

[0027] Since embodiments of the present invention are provided to give a more complete explanation to an ordinary person, the shapes and sizes of the components in the drawings may be exaggerated, omitted, or shown schematically for the sake of clarity. Accordingly, the sizes and proportions of each component do not fully reflect the actual sizes and proportions.

[0028] (First Embodiment) Figures 1a and 1b are cross-sectional views showing a tape application device 10 according to an exemplary embodiment of the present invention.

[0029] Referring to Figures 1a and 1b, the tape attachment device 10 may include a tape holder 100 configured to support the tape and attach the tape to the workpiece 310, and a stage 200 that supports the workpiece 310.

[0030] The tape holder 100 can attach the first tape 320 to the first surface 311 of the workpiece 310 and the second tape 330 to the second surface 313 of the workpiece 310. The first surface 311 and the second surface 313 of the workpiece 310 may be opposite to each other. The length of the first tape 320 along the horizontal direction (e.g., the X direction) may be greater than the length of the workpiece 310 along the horizontal direction (e.g., the X direction), and the first tape 320 may include a central part 321 that is attached to the first surface 311 of the workpiece 310 and an outer part 323 that is not attached to the workpiece 310. The first tape 320 may include a pair of outer parts 323 that are separated horizontally (e.g., in the X direction) with the central part 321 in between. The length of the second tape 330 along the horizontal direction (e.g., the X direction) may be greater than the length of the workpiece 310 along the horizontal direction (e.g., the X direction), and the second tape 330 may include a central portion 331 that adheres to the second surface 313 of the workpiece 310 and an outer portion 333 that does not adhere to the workpiece 310. The second tape 330 may include a pair of outer portions 333 that are separated horizontally (e.g., in the X direction) with the central portion 331 in between. The tape holder 100 can attach the central portion 321 of the first tape 320 and the central portion 331 of the second tape 330 to the workpiece 310, and the outer portion 323 of the first tape 320 to the outer portion 333 of the second tape 330.

[0031] The tape holder 100 may include a first holder 110 that supports a first tape 320 and a second holder 150 that supports a second tape 330. The first holder 110 may be positioned above the workpiece 310, and the second holder 150 may be positioned below the workpiece 310. The first holder 110 may be called the upper holder, and the second holder 150 may be called the lower holder. The first holder 110 and the second holder 150 may be aligned vertically (e.g., in the Z direction) and separated vertically (e.g., in the Z direction) with the workpiece 310 mounted on the stage 200 in between.

[0032] At least one of the first holder 110 and the second holder 150 may be configured to move vertically (e.g., in the Z direction). The vertical movement of the first holder 110 and / or the vertical movement of the second holder 150 may be controlled by a lifting actuator. The vertical movement of the first holder 110 and / or the vertical movement of the second holder 150 may adjust the distance between the first holder 110 and the second holder 150.

[0033] The first holder 110 may be configured to support the first tape 320 by suction. The first tape 320 has an adhesive surface and a non-adhesive surface opposite to each other, and the support surface of the first holder 110 can support the non-adhesive surface of the first tape 320. The first holder 110 may include a plurality of suction holes extending from the support surface that supports the non-adhesive surface of the first tape 320. A vacuum pump connected to the first holder 110 can depressurize the plurality of suction holes of the first holder 110 so that the first tape 320 adheres to the support surface of the first holder 110. The vacuum suction to the first tape 320 can be discarded by releasing the vacuum evacuation from the plurality of suction holes of the first holder 110 using the vacuum pump connected to the first holder 110.

[0034] The second holder 150 may be configured to suction-support the second tape 330. The second tape 330 has an adhesive surface and a non-adhesive surface opposite to each other, and the support surface of the second holder 150 can support the non-adhesive surface of the second tape 330. The second holder 150 may include a plurality of suction holes extending from the support surface that supports the non-adhesive surface of the second tape 330. A vacuum pump connected to the second holder 150 depressurizes the plurality of suction holes of the second holder 150 so that the second tape 330 adheres to the support surface of the second holder 150. The vacuum suction to the second tape 330 can be discarded by releasing the vacuum evacuation from the plurality of suction holes of the second holder 150, which is performed by the vacuum pump connected to the second holder 150.

[0035] The first holder 110 may include a central part 111 that supports the central part 321 of the first tape 320 and an outer part 113 that supports the outer part 323 of the first tape 320. The first holder 110 may include a pair of outer parts 113 that are spaced horizontally (for example, in the X direction) with the central part 111 in between. The central part 111 and the outer parts 113 of the first holder 110 may be called the first central block and the first outer block, respectively.

[0036] The support surface 123 of the outer casing 113 of the first holder 110 may include a portion that protrudes from the support surface 121 of the central part 111 of the first holder 110. In exemplary embodiments, the support surface 121 of the central part 111 of the first holder 110 may be a flat surface, and the support surface 123 of the outer casing 113 of the first holder 110 may include a non-flat surface. In exemplary embodiments, the flatness of the support surface 121 of the central part 111 of the first holder 110 may be greater than the flatness of the support surface 123 of the outer casing 113 of the first holder 110. In exemplary embodiments, the support surface 123 of the outer casing 113 of the first holder 110 may have a step at its boundary with the support surface 121 of the central part 111 of the first holder 110.

[0037] The second holder 150 may include a central part 151 that supports the central part 331 of the second tape 330 and an outer part 153 that supports the outer part 333 of the second tape 330. The second holder 150 may include a pair of outer parts 153 that are spaced horizontally (for example, in the X direction) with the central part 151 in between. The central part 151 and the outer parts 153 of the second holder 150 may be called the second central block and the second outer block, respectively.

[0038] The support surface 163 of the outer casing 153 of the second holder 150 may include a portion that protrudes from the support surface 161 of the central part 151 of the second holder 150. In exemplary embodiments, the support surface 161 of the central part 151 of the second holder 150 may be a flat surface, and the support surface 163 of the outer casing 153 of the second holder 150 may include a non-flat surface. In exemplary embodiments, the flatness of the support surface 161 of the central part 151 of the second holder 150 may be greater than the flatness of the support surface 163 of the outer casing 153 of the second holder 150. In exemplary embodiments, the support surface 163 of the outer casing 153 of the second holder 150 may have a step at its boundary with the support surface 161 of the central part 151 of the second holder 150.

[0039] In exemplary embodiments, the support surface 123 of the outer casing 113 of the first holder 110 may include a plurality of first protrusions 131 and may have an overall uneven structure. In exemplary embodiments, the support surface 163 of the outer casing 153 of the second holder 150 may include a plurality of second protrusions 171 and may have an overall uneven structure. In exemplary embodiments, the plurality of second protrusions 171 may be arranged so as not to be aligned perpendicularly (e.g., in the Z direction) with respect to the plurality of first protrusions 131. For example, the plurality of first protrusions 131 may be offset horizontally (e.g., in the X and / or Y directions) with respect to the plurality of second protrusions 171.

[0040] An exemplary tape application method using the tape application device 10 will be described below with reference to Figures 1a and 1b.

[0041] Referring to Figure 1a, the first holder 110 suction-supports the non-adhesive surface of the first tape 320, and the second holder 150 suction-supports the non-adhesive surface of the second tape 330.

[0042] The suction support of the first tape 320 by the first holder 110 may include the steps of: gripping the first tape fabric provided from the first tape supply unit with the first tape dispenser; moving the first tape fabric with the first tape dispenser so that the first tape fabric is positioned below the first holder 110; applying vacuum pressure to the suction hole of the first holder 110 to suction the first tape fabric to the support surface of the first holder 110; and cutting the portion of the first tape fabric between the first holder 110 and the first tape supply unit with the first cutter.

[0043] The suction support of the second tape 330 by the second holder 150 may include the steps of: gripping the second tape fabric provided from the second tape supply unit with the second tape dispenser; moving the second tape fabric with the second tape dispenser so that the second tape fabric is positioned on the second holder 150; applying vacuum pressure to the suction hole of the second holder 150 to suction the second tape fabric to the support surface of the second holder 150; and cutting the portion of the second tape fabric between the second holder 150 and the second tape supply unit with the second cutter.

[0044] Referring to Figure 1b, the first holder 110 is lowered so that the first tape 320 comes into contact with the workpiece 310 mounted on the stage 200, and the second holder 15 is raised so that the second tape 330 comes into contact with the workpiece 310 mounted on the stage 200. The tape holder 100 adheres the center 321 of the first tape 320 and the center 331 of the second tape 330 to the workpiece 310, and the outer edge 323 of the first tape 320 to the outer edge 333 of the second tape 330, so that an appropriate adhesive pressure is formed between the first holder 110 and the second holder 150.

[0045] In the tape application apparatus according to the comparative example, the support surfaces of the upper holder and the lower holder may be flat overall. In this case, during the tape application process in which two tapes (i.e., the upper tape and the lower tape) are applied to the workpiece, the adhesive pressure formed between the upper and lower holders in the section where the two tapes are directly bonded may be insufficient, potentially leading to unstable adhesion between the two tapes.

[0046] According to an exemplary embodiment of the present invention, since the support surface 123 of the outer casing 113 of the first holder 110 and / or the support surface 163 of the outer casing 153 of the second holder 150 have protruding portions, the adhesive pressure between the first tape 320 and the second tape 330 can be strengthened in the section where the first tape 320 and the second tape 330 are directly bonded, without changing the adhesive pressure between the first tape 320 and the workpiece 310 and the adhesive pressure between the second tape 330 and the workpiece 310. Therefore, since the adhesive force between the first tape 320 and the second tape 330 is strengthened, it is possible to suppress the failure of the bond between the first tape 320 and the second tape 330.

[0047] In exemplary embodiments, the multiple first projections 131 on the support surface 123 of the outer casing 113 of the first holder 110 and the multiple second projections 171 on the support surface 163 of the outer casing 153 of the second holder 150 may be misaligned in the vertical direction (e.g., the Z direction). In this case, during the tape application process, the adhesive pressure between the outer casing 323 of the first tape 320 and the outer casing 333 of the second tape 330 can be increased, thereby strengthening the adhesive force between the first tape 320 and the second tape 330.

[0048] In exemplary embodiments, at least one of the outer casing 113 of the first holder 110 and the outer casing 153 of the second holder 150 may include a heater configured to apply heat in order to enhance the adhesive pressure between the outer casing 323 of the first tape 320 and the outer casing 333 of the second tape 330.

[0049] In exemplary embodiments, the workpiece 310 may be the joint between the electrode tabs and electrode leads of a battery cell joined by welding. The first tape 320 and the second tape 330 may be attached to the joint between the electrode tabs and electrode leads of the battery cell and configured to protect the joint between the electrode tabs and electrode leads of the battery cell. According to exemplary embodiments of the present invention, the adhesion between the first tape 320 and the second tape 330 is enhanced, so that damage to the battery cell due to poor adhesion between the first tape 320 and the second tape 330 can be prevented, ultimately improving the reliability of the battery cell.

[0050] (Second Embodiment) Figures 2a and 2b are cross-sectional views showing a tape application device 11 according to an exemplary embodiment of the present invention. The tape application device 11 shown in Figures 2a and 2b will be described below, focusing on the differences from the tape application device 10 described with reference to Figures 1a and 1b.

[0051] Referring to Figures 2a and 2b, in the tape holder 100A of the tape application device 11, the support surface 123A of the outer casing 113 of the first holder 110A may include a plurality of first protrusions 131, and the support surface 163A of the outer casing 153 of the second holder 150A may include a plurality of grooves 173. Each of the plurality of first protrusions 131 may be aligned perpendicularly (for example, in the Z direction) to a corresponding groove 173 among the plurality of grooves 173. In this case, during the tape application process, the adhesive pressure between the outer casing 323 of the first tape 320 and the outer casing 333 of the second tape 330 can be strengthened, thereby strengthening the adhesive force between the first tape 320 and the second tape 330.

[0052] (Third embodiment) Figures 3a and 3b are cross-sectional views showing a tape application device 12 according to an exemplary embodiment of the present invention. The tape application device 12 shown in Figures 3a and 3b will be described below, focusing on the differences from the tape application device 10 described with reference to Figures 1a and 1b.

[0053] Referring to Figures 3a and 3b, in the tape holder 100B of the tape attachment device 12, at least one of the outer casing 113 of the first holder 110B and the outer casing 153 of the second holder 150B may include a foam pad. The foam pad may have pores inside. The foam pad has compressible properties, and when an external force is applied, the thickness of the foam pad decreases from its initial thickness, and when the external force is removed, the thickness of the foam pad returns to its initial thickness.

[0054] In an exemplary embodiment, the outer casing 113 of the first holder 110B may include a first foam pad 135 that contacts the outer casing 323 of the first tape 320. For example, the first holder 110B may include a body comprising a central part and an outer casing, and a first foam pad 135 connected to the outer casing of the body of the first holder 110B. In this case, when vacuum pressure is applied to the suction hole of the body of the first holder 110B, the first tape 320 can be adhered to the first foam pad 135 by the suction force provided through the first foam pad 135. The support surface 123B of the outer casing 113 of the first holder 110B may include the surface of the first foam pad 135.

[0055] In an exemplary embodiment, the outer casing 153 of the second holder 150B may include a second foam pad 175 that contacts the outer casing 333 of the second tape 330. For example, the second holder 150B may include a body comprising a central part and an outer casing, and a second foam pad 175 connected to the outer casing of the body of the second holder 150B. In this case, when vacuum pressure is applied to the suction hole of the body of the second holder 150B, the second tape 330 can be adhered to the second foam pad 175 by the suction force provided through the second foam pad 175. The support surface 163B of the outer casing 153 of the second holder 150B may include the surface of the second foam pad 175.

[0056] During the tape application process, the adhesive pressure between the outer edge 323 of the first tape 320 and the outer edge 333 of the second tape 330, which are sandwiched between the first foam pad 135 and the second foam pad 175, is strengthened, thereby enhancing the adhesive strength between the first tape 320 and the second tape 330.

[0057] (Fourth embodiment) Figures 4a and 4b are cross-sectional views showing a tape application device 13 according to an exemplary embodiment of the present invention. The tape application device 13 shown in Figures 4a and 4b will be described below, focusing on the differences from the tape application device 10 described with reference to Figures 1a and 1b.

[0058] Referring to Figures 4a and 4b, in the tape holder 100C of the tape attachment device 13, the first holder 110C may include an independently movable and separated central part 111A and outer part 113A, and the second holder 150C may include an independently movable and separated central part 151A and outer part 153A. The central part 111A and outer part 113A of the first holder 110C may be called the first central block and the first outer part block, respectively, and the central part 151A and outer part 153A of the second holder 150C may be called the second central block and the second outer part block, respectively.

[0059] The tape application device 13 may include a pressing device 180 located between the outer casing 113A of the first holder 110C and the outer casing 153A of the second holder 150C, configured to adjust the adhesive pressure between the outer casing 323 of the first tape 320 and the outer casing 333 of the second tape 330. The pressing device 180 may be connected to the outer casing 113A of the first holder 110C and configured to apply pressure to the outer casing 113A of the first holder 110C toward the support surface of the second holder 150C.

[0060] During the tape application process, the pressing device 180 can apply pressure to the outer portion 113A of the first holder 110C facing the second holder 150C so as to strengthen the adhesive pressure between the outer portion 323 of the first tape 320 and the outer portion 333 of the second tape 330, thereby strengthening the adhesive force between the first tape 320 and the second tape 330.

[0061] (Fifth embodiment) Figures 5a and 5b are cross-sectional views showing a tape application device 14 according to an exemplary embodiment of the present invention. The tape application device 14 shown in Figures 5a and 5b will be described below, focusing on the differences from the tape application device 13 described with reference to Figures 4a and 4b.

[0062] Referring to Figures 5a and 5b, in the tape holder 100D of the tape attachment device 14, at least one of the outer casing 113A of the first holder 110D and the outer casing 153A of the second holder 150D may include a heater. For example, the heater may be an electrical resistance heater and may include a heating electrode configured to be heated by a heating power supply applied by an external heating power supply unit.

[0063] In an exemplary embodiment, the outer casing 113A of the first holder 110D may include a first heater 137. For example, the first heater 137 may be embedded within the outer casing 113A of the first holder 110D.

[0064] In exemplary embodiments, the outer casing 153A of the second holder 150D may include a second heater 177. For example, the second heater 177 may be embedded within the outer casing 153A of the second holder 150D.

[0065] During the tape application process, at least one of the first heater 137 and the second heater 177 can apply heat to the outer perimeter 323 of the first tape 320 and the outer perimeter 333 of the second tape 330, thereby strengthening the adhesive force between the first tape 320 and the second tape 330.

[0066] The present invention has been described in more detail above with reference to the drawings and embodiments. However, the configurations described in the drawings or embodiments described herein are merely one embodiment of the present invention and do not represent the entire technical concept of the present invention. Therefore, there may be a variety of equivalents and modifications that can be substituted for them at the time of filing.

Claims

1. A tape application device configured to apply a first tape to a first surface of a workpiece and a second tape to a second surface of the workpiece, A tape holder comprising a first holder supporting the first tape and a second holder supporting the second tape, wherein the center of the first tape and the center of the second tape are attached to the workpiece, and the outer edge of the first tape is attached to the outer edge of the second tape. Includes, The first holder includes a central part that supports the central part of the first tape and an outer part that supports the outer part of the first tape, The second holder includes a central part that supports the central part of the second tape and an outer part that supports the outer part of the second tape, A tape application device wherein the support surface of the outer casing of the first holder includes a portion that protrudes from the support surface of the central part of the first holder.

2. The tape attachment device according to claim 1, wherein the support surface of the central part of the first holder has a greater degree of flatness than the support surface of the outer part of the first holder.

3. The tape attachment device according to claim 1, wherein the support surface of the outer casing of the second holder includes a portion that protrudes from the support surface of the central part of the second holder.

4. The tape attachment device according to claim 3, wherein the support surface of the central part of the second holder has a greater degree of flatness than the support surface of the outer part of the second holder.

5. The support surface of the outer casing of the first holder includes a plurality of first protrusions, The tape attachment device according to claim 1, wherein the support surface of the outer casing of the second holder includes a plurality of second protrusions.

6. The tape attachment device according to claim 5, wherein the plurality of first protrusions are not aligned perpendicularly to the plurality of second protrusions.

7. The support surface of the outer casing of the first holder includes a plurality of first protrusions, The support surface of the outer casing of the second holder includes a plurality of grooves, The tape attachment device according to claim 1, wherein each of the plurality of first protrusions is aligned perpendicularly to a corresponding groove among the plurality of grooves.

8. The tape attachment device according to claim 1, wherein the outer casing of the first holder includes a first foam pad that contacts the first tape.

9. The tape attachment device according to claim 8, wherein the outer casing of the second holder includes a second foam pad that contacts the second tape.

10. The tape application device according to claim 1, wherein at least one of the outer casing of the first holder and the outer casing of the second holder includes a heater.

11. A tape application device configured to apply a first tape to a first surface of a workpiece and a second tape to a second surface of the workpiece, A tape holder comprising a first holder supporting the first tape and a second holder supporting the second tape, wherein the center of the first tape and the center of the second tape are attached to the workpiece, and the outer edge of the first tape is attached to the outer edge of the second tape. Includes, The first holder includes a first central block that supports the central part of the first tape and a first outer block that supports the outer part of the first tape. A tape attachment device in which the first central block and the first outer block are configured to move independently.

12. The tape application apparatus according to claim 11, further comprising a first pressing device configured to pressurize the first outer block toward the second holder.

13. The tape application device according to claim 11, wherein the first outer block includes a first heater.

14. The second holder includes a second central block that supports the central part of the second tape and a second outer block that supports the outer part of the second tape. The tape attachment device according to claim 11, wherein the second central block and the second outer block are configured to move independently.

15. The first outer block includes a first heater, The tape application apparatus according to claim 14, wherein the second outer block includes a second heater.

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