Scar repair methods

Abstract

The present invention provides a method for repairing scars that allows for easy and subtle adjustments in resin replacement of scars. [Solution] The present invention comprises a suction cup abutment step in which liquid resin is poured into the suction cup chamber of the suction cup jig, and the periphery of the suction cup jig is abutted in alignment with the scar; a suction cup suction step in which the suction cup jig is pulled while maintaining an airtight state of the suction cup jig to reduce the pressure in the suction cup chamber and extract air remaining in cracks in the scar; a suction cup pressurization step in which the suction cup jig is pushed while maintaining an airtight state of the suction cup jig to pressurize the suction cup chamber and cause the resin in the suction cup chamber to penetrate into the cracks; and a suction cup release step in which the suction cup jig is released from the scar, and the air inside the scar is replaced with resin by pressurizing and depressurizing the suction cup jig.

Description

[Technical Field]

[0001] The present invention relates to a method for scar repair. [Background technology]

[0002] BACKGROUND ART Conventionally, a known method for making scratches, such as impact marks, on objects such as glass less noticeable is a scratch repair method in which a repair agent such as resin (hereinafter referred to as "resin") is filled into the scratches.

[0003] For example, Figure 1 of Patent Document 1 discloses a scar repair method that includes "an injector consisting of a cylindrical syringe and a plunger, and an injection tube connected to the injector that covers the scar, and by operating the injector's piston (pressing and suction), the air inside the scar is replaced with resin." [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-276433 Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-mentioned Patent Document 1, it is necessary to inject resin to the tip of various minute cracks that differ for each scar, which requires the worker to make delicate adjustments to the resin injection that differ for each scar.

[0006] However, the syringe barrel of the injector in Patent Document 1 has an excess air volume compared to the amount of resin to be injected into the microcrack. This excess air volume significantly compresses and expands in response to pressure changes when the operator operates the piston, acting as a relatively loose air spring. This loose air spring always exists between the operator's piston operation and the actual amount of resin injected, acting as a delay element. Therefore, the operator must adjust the force of the piston operation (pressure and suction of the plunger) while predicting the delay time in the amount of resin injected due to compression of the loose air spring, making it difficult to fine-tune the resin injection.

[0007] Furthermore, friction and rattle act on the sliding surface between the syringe barrel and plunger of the injector. This friction and rattle in the sliding direction changes discontinuously when the plunger moves from a stationary state to a sliding state. This discontinuous change acts as a kind of backlash (so-called play). Therefore, the operator must carefully adjust the force of the piston operation (pressure and suction of the plunger) while anticipating the occurrence of discontinuous backlash, making it even more difficult to fine-tune the resin injection.

[0008] Therefore, an object of the present invention is to provide a scar repair method that allows easy and subtle adjustment of resin injection. [Means for solving the problem]

[0009] The present invention is a scar repair method for replacing the air inside a scar on an object with liquid resin, and includes the following steps (a suction cup contact step, a suction cup suction step, and a suction cup pressure step).

[0010] The suction cup abutment process involves preparing a flexible suction cup-shaped jig (hereinafter referred to as the "suction cup jig"), pouring liquid resin into the space between the recessed inner wall of the suction cup jig and the object (hereinafter referred to as the "suction cup recessed chamber"), and abutting the periphery of the suction cup jig against the object while aligning it with the scar.

[0011] In the suction cup suction process, the suction cup jig is pulled toward the scar while maintaining an airtight state with the periphery of the suction cup jig in contact with the object, thereby reducing the pressure in the suction cup recess of the suction cup jig and drawing out any air remaining in the cracks in the scar.

[0012] In the suction cup pressurization process, the suction cup jig is pressed against the scar while maintaining an airtight state with the periphery of the suction cup jig in contact with the object, thereby pressurizing the suction cup chamber of the suction cup jig and causing the resin in the suction cup chamber to penetrate into the crack. [Effects of the Invention]

[0013] In the scar repair method of the present invention, the resin is pressurized using a suction cup jig, making it possible to easily make delicate adjustments to the resin injection.

[0014] Problems, configurations, and effects other than those described above will be explained in more detail in the following description of the embodiments. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 1 is a diagram illustrating the procedure of the scar repair method of Example 1. [Figure 2] FIG. 2 is a diagram showing a scar 120 to be repaired in Example 2. [Figure 3] FIG. 3 is a diagram illustrating the procedure (first half) of the scar repair method of Example 2. [Figure 4] FIG. 4 is a diagram illustrating the procedure (second half) of the scar repair method of Example 2. [Figure 5] FIG. 5 is a diagram showing the arrangement of magnifying glass 210 and lighting unit 210A (as viewed from outside vehicle 100) in the magnifying glass installation process. [Figure 6] FIG. 6 is a diagram showing the arrangement of the magnifying glass 210 and the lighting unit 210A (as viewed from inside the vehicle 100) in the magnifying glass installation process. [Figure 7] FIG. 7 is a diagram illustrating the illumination state by the illumination unit 210A. [Figure 8]Fig. 8[A] is a diagram illustrating the scar confirmation step (part 1), and Fig. 8[B] is a diagram illustrating the scar confirmation step (part 2). [Figure 9] Figure 9[A] is a diagram illustrating the scar shaping step (part 1), and Figure 9[B] is a diagram illustrating the scar shaping step (part 2). [Figure 10] Fig. 10[A] is a diagram illustrating the scar cleaning step, and Fig. 10[B] is a diagram illustrating the crack opening step (part 1). [Figure 11] Fig. 11[A] is a diagram illustrating the crack opening step (part 2), and Fig. 11[B] is a diagram illustrating the suction cup contact step. [Figure 12] Fig. 12[A] is a diagram illustrating the suction cup suction process (part 1), and Fig. 12[B] is a diagram illustrating the suction cup suction process (part 2). [Figure 13] Fig. 13[A] is a diagram illustrating the suction cup suction step (part 3), and Fig. 13[B] is a diagram illustrating the suction cup suction step (part 4). [Figure 14] Fig. 14[A] is a diagram illustrating the suction cup pressing step (part 1), and Fig. 14[B] is a diagram illustrating the suction cup pressing step (part 2). [Figure 15] Fig. 15[A] is a diagram illustrating the suction cup pressing step (part 3), and Fig. 15[B] is a diagram illustrating the suction cup pressing step (part 4). [Figure 16] Fig. 16[A] is a diagram illustrating the suction cup pressurizing step (part 5), and Fig. 16[B] is a diagram illustrating the resin hardening step (part 1). [Figure 17] Figure 17[A] is a diagram illustrating the resin hardening step (part 2), and Figure 17[B] is a diagram illustrating the resin hardening step (part 3). [Figure 18] Fig. 18[A] is a diagram illustrating the resin hardening step (part 4), and Fig. 18[B] is a diagram illustrating the resin hardening step (part 5). [Figure 19]Fig. 19[A] is a diagram illustrating the surface shaping step (part 1), and Fig. 19[B] is a diagram illustrating the surface shaping step (part 2). DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. [Example]

[0017] In Example 1, a method for repairing a scar that replaces the air inside a scar that has occurred on an object with liquid resin will be described.

[0018] <<Explanation of the Process of Example 1>> FIG. 1 is a diagram illustrating the procedure of the scar repair method of Example 1. Below, each step of the scar repair method will be explained in accordance with the step numbers shown in Figure 1.

[0019] ■ Step S101 (suction cup contact process) The worker prepares a flexible suction cup jig. The worker pours liquid resin into a suction cup chamber that is sandwiched between the object and the inner wall of the suction cup jig, which is roughly conical or dome-shaped. The worker aligns the suction cup jig with the scar and, in this state, brings the periphery of the suction cup jig into contact with the object.

[0020] ■ Step S102 (suction cup suction process) While keeping the periphery of the suction cup jig in airtight contact with the object, the worker pulls the central protrusion of the suction cup jig in a direction approximately perpendicular to the object. By doing so, the worker reduces the pressure in the suction cup recess of the suction cup jig and draws out any air remaining inside the crack in the scar.

[0021] ■ Step S103 (suction cup pressure process) While keeping the periphery of the suction cup jig in airtight contact with the object, the worker presses the central protrusion of the suction cup jig in a direction approximately perpendicular to the object. By doing so, the worker applies pressure to the suction cup chamber of the suction cup jig, causing the resin in the suction cup chamber to penetrate into the crack.

[0022] By following the procedure of steps S101 to S103 described above, the operator completes the scar repair by resin replacement.

[0023] Effect of Example 1 The scar repair method of the first embodiment described above has the following effects.

[0024] (1) In Example 1, because the suction cup jig is shaped like a suction cup, the suction cup recess formed when it comes into contact with the object has a flat shape. Therefore, the air volume of the suction cup jig is significantly smaller than that of the injector (long, cylindrical shape) of Patent Document 1. As a result, the suction cup jig, unlike an injector, is less likely to generate a loose air spring. Therefore, when pressurizing the suction cup jig, the operator hardly needs to predict the delay time in the resin injection amount caused by a loose air spring. In this way, Example 1 is advantageous in that there is almost no delay time in resin injection when pressurizing, making it easy to make subtle adjustments to the resin injection.

[0025] (2) Furthermore, in Example 1, the flexible suction cup jig itself is pushed and pulled against the scar, so there is almost no friction or wobble in the sliding direction, which was a problem in Patent Document 1. As a result, the suction cup jig is significantly different from an injector with a sliding plunger, and discontinuous backlash is less likely to occur. In this way, Example 1 is superior in that it is structurally almost free of backlash, making it even easier to make subtle adjustments to the resin injection. [Example]

[0026] Next, in Example 2, the scar repair method will be explained with the addition of pre- and post-treatments.

[0027] <<Explanation of the Process of Example 2>> FIG. 2 is a diagram showing a scar 120 to be repaired in Example 2. The scratch 120 is a strike mark caused on the front side of the vehicle window 110 (corresponding to the object) of the vehicle 100 by an impact such as a flying stone.

[0028] 3 and 4 are diagrams illustrating the procedure of the scar repair method of Example 2. The steps of the scar repair method will be described below in accordance with the step numbers shown in FIGS.

[0029] ■ Step S201 (Equipment installation: Magnifying glass installation process) Fig. 5 is a diagram showing the arrangement of magnifying glass 210 and lighting unit 210A in the magnifying glass installation process (as viewed from outside vehicle 100). Fig. 6 is a diagram showing the arrangement of magnifying glass 210 and lighting unit 210A in the magnifying glass installation process (as viewed from inside vehicle 100).

[0030] The worker marks the scar 120 from the outside of the vehicle window 110 with a removable marking pen, a sticky note, or the like. Next, the worker plans the placement of the magnifying glass 210 while checking the marking from inside the vehicle 100. At this time, by placing the scar 120 closer than the focal length of the magnifying glass 210, an erect virtual image 120A (magnified glass image) of the scar 120 is projected onto the magnifying glass 210. The worker fixes the suction tool 220 and adjusts the bending of the flexible arm 230 so as to maintain the position of the magnifying glass 210.

[0031] Illumination units 210A are arranged, for example, in a ring shape or approximately evenly around the periphery of the magnifying glass 210. When performing scar repair outside the vehicle 100, the worker can operate a wireless remote control 210B (or an alternative remote control using a smartphone and an app function) to remotely turn on / off the illumination units 210A from outside the vehicle 100 as needed.

[0032] FIG. 7 is a diagram illustrating the lighting conditions by the lighting unit 210A. 7, illumination light L is irradiated from almost all directions around the periphery of magnifying glass 210 toward central scar 120. Therefore, regardless of the direction of the cracks in scar 120, illumination light L reliably penetrates into the gaps between the cracks from various directions, and almost all of the cracks are magnified and reflected in erect virtual image 120A. This reduces the chance of cracks in scar 120 being overlooked.

[0033] It is preferable that the worker checks whether there is any problem with the visibility of the erect virtual image 120A of the scar 120 when returning to the outside of the vehicle 100. If there is any problem such as vignetting or distortion in the erect virtual image 120A, the worker returns to S201 and corrects the position of the magnifying glass 210.

[0034] ■ Step S202 (Pre-processing: scar confirmation process) The worker confirms the position of the impact point by touching the scar 120 with the probe. If there are any fragments that look like they might come off from the scar 120, the worker removes the fragments as necessary (see FIG. 8[A]).

[0035] Furthermore, if there is moisture, dirt, sand or other foreign matter inside the scar 120, the worker cleans the scar 120 with a detergent or the like as necessary to make it clean (see FIG. 8[B]).

[0036] ■ Step S203 (Pre-treatment: scar shaping process) To improve the flow of resin when it is injected, the worker grinds off an appropriate position of the scar 120 with a drilling bit (such as a router) to widen the resin injection port (see FIG. 9[A]).

[0037] If the contour shape of the injection port of the scar 120 is irregular, the contour shape of the injection port is smoothed by grinding with a drilling bit (such as a router) so that the resin can penetrate evenly (see FIG. 9[B]).

[0038] ■ Step S204 (Pre-processing: scar cleaning process) To remove foreign matter such as debris generated during the excavation of the scar 120, the worker drips resin onto the scar 120 to wash away the foreign matter, and if necessary, cleans the scar 120 with a cleaning stick or the like (see Figure 10[A]).

[0039] ■ Step S205 (Pre-processing: Crack opening process) The worker applies a film to the underside of the scar 120 and drips resin onto the scar 120. In this state, the worker covers the surface of the scar 120 with a film to make the scar 120 in a degassed state (a state that does not contain air bubbles) (see FIG. 10[B]).

[0040] Next, the worker applies pressure from above the film to give an appropriate distortion to the scar 120, opening up the closed part of the crack in the scar 120. This crack-opening process not only allows the resin to penetrate into the opened closed part, but also allows the resin to penetrate through the closed part to the end of the divided crack (see Figure 11[A]).

[0041] ■ Step S206 (suction cup contact process) The worker prepares a flexible suction cup-shaped jig (hereinafter referred to as "suction cup jig 300"). With the suction cup jig 300 placed under the scar 120, the worker pours liquid resin into the space (hereinafter referred to as "suction cup recessed chamber 300A") between the vehicle window 110 and the inner wall of the suction cup jig 300, which is recessed in a generally conical or dome shape, and aligns it with the scar 120. In this state, the worker brings the periphery of the suction cup jig 300 into contact with the object (see FIG. 11[B]). At this time, it is preferable that the worker presses the suction cup jig 300 to remove as much excess air as possible from the suction cup recessed chamber 300A. By removing excess air from the suction cup recessed chamber 300A in this way, it is possible to further reduce the unnecessary air spring effect in the suction cup recessed chamber 300A.

[0042] ■ Step S207 (suction cup suction process) While maintaining an airtight state in which the periphery of the suction cup jig 300 is in contact with the vehicle window 110, the worker pulls the central protrusion of the suction cup jig 300 toward the scar 120. By this action, the worker reduces the pressure in the suction cup recessed chamber 300A of the suction cup jig 300 and draws out the air remaining inside the crack in the scar 120 (see FIG. 12[A]). Note that while this air is being drawn out, a small amount of resin in the suction cup recessed chamber 300A seeps into the crack.

[0043] During this decompression operation, the worker checks whether the air in the crack has been sucked out by observing the change in the shadow of the erect virtual image 120A of the magnifying glass 210 (see FIG. 12[B]). Sufficient evacuation of the air in the crack will ensure the subsequent resin injection (see FIG. 13[A]).

[0044] The worker checks whether the air in the crack has been sucked in by checking for changes in the shadow of the upright virtual image 120A (such as the disappearance of the black shadow). If sufficient suction is confirmed, the worker aligns the center of the suction cup jig 300 with the scar 120 in preparation for the next suction cup pressure application step (see FIG. 13[B]).

[0045] ■ Step S208 (suction cup pressure process) While keeping the periphery of the suction cup jig 300 in an airtight state with the periphery abutting against the vehicle window 110, the worker presses the central protrusion of the suction cup jig 300 toward the scar 120. By this action, the worker applies pressure to the suction cup recess 300A of the suction cup jig 300, widening the crack and causing the resin in the suction cup recess 300A to penetrate into the interior of the crack (see FIG. 14[A]).

[0046] During this pressurizing operation, the worker checks the state of penetration of the resin into the crack by observing the change in the shade of the erect virtual image 120A of the magnifying glass 210 (see FIG. 14[B]).

[0047] Because the refractive index of the resin is close to that of the vehicle window 110, the shadows (shadows, refraction, diffuse reflection, etc.) that appear on the erect virtual image 120A are reduced as the resin penetrates into the crack. During this pressure application, depending on the direction of the force, the suction cup jig 300 may slip and become displaced. Therefore, the worker continues to apply pressure to prevent the suction cup jig 300 from becoming displaced (see FIG. 15[A]).

[0048] If the shadow of the erect virtual image 120A remains even after the pressure is continued, the worker returns to the crack opening step (see FIG. 15[B]).

[0049] In some cases, the shadow remaining on the erect virtual image 120A disappears by releasing the pressure of the suction cup jig 300. In that case, there is no need to return to the crack opening step (see FIG. 16[A]).

[0050] By carrying out the steps up to this point, the work of replacing the air in the scar 120 with resin is completed.

[0051] ■ Step S209 (suction cup release process) After completing the application of pressure to the suction cup jig 300, the worker releases the suction cup jig 300 by, for example, moving it away from the scar 120, and removes it from the vehicle window 110.

[0052] ■ Step S210 (Post-processing: Resin hardening process) The worker applies a film to the underside of the scar 120 and drips resin onto the scar 120. In this state, the worker covers the surface of the scar 120 with a film to degas the scar 120 (see FIG. 16[B]).

[0053] At this time, the worker adjusts the state of attachment of the film and the amount of resin to prevent air bubbles from getting mixed into the resin. The worker visually checks that there are no air bubbles between the film and the vehicle window 110 (see FIG. 17[A]).

[0054] If the resin is an ultraviolet curing resin, the worker places a UV lamp (ultraviolet light source) for curing the resin on top of the film and irradiates it with ultraviolet light (see Figure 17[B]).

[0055] Incidentally, the vehicle window 110 has a shatterproof layer as an intermediate layer of glass. Because this shatterproof layer may block ultraviolet rays, it is preferable to irradiate ultraviolet rays mainly from the front side of the vehicle window 110 where the scratch 120 has occurred. However, depending on the type of object to be repaired, irradiating ultraviolet rays from the back side may also be effective. In that case, ultraviolet rays for curing the resin may be irradiated from the back side of the scratch 120 by, for example, switching the illumination unit 210A from visible light to ultraviolet light.

[0056] Also, depending on the curing shrinkage of the resin and the amount used, the resin may thin out after curing, causing a dent (see Figure 18[A]). In this case, the worker adds liquid resin and repeats the resin curing process (see Figure 18[B]).

[0057] By the way, if the resin is a thermosetting resin, the worker can simply heat and harden the resin using a heat gun or similar.

[0058] Here, the resin is hardened after the suction cup jig 300 is replaced with the film, but the replacement step may be omitted by hardening the resin while the suction cup jig 300 remains attached.

[0059] ■ Step S211 (Post-processing: Surface shaping process) After the resin has hardened, the worker peels off the film (or suction cup jig 300). Next, if necessary, the worker cuts off any excess resin that has protruded onto the surface of the scar 120 with a blade or the like (see FIG. 19[A]).

[0060] Furthermore, if necessary, the worker may use an abrasive (such as a compound) and an abrasive tool (such as a puff) to polish the surface of the scar 120, thereby smoothing out the repair marks of the scar 120 so that they are less noticeable (see FIG. 19[B]). Through the above-described series of steps, the worker completes the repair of the scar 120.

[0061] Effect of Example 2

[0062] (1) In Example 2, the suction cup jig 300 is suction cup-shaped, so the suction cup recess 300A formed when it contacts the object has a relatively flat shape. Therefore, the air volume of the suction cup jig 300 is significantly smaller than that of the injector (long cylindrical shape) of Patent Document 1. As a result, the suction cup jig 300, unlike an injector, is less likely to generate a loose air spring. Therefore, when pressurizing the suction cup jig 300, the operator hardly needs to anticipate the delay in the resin injection amount caused by a loose air spring. Thus, Example 2 is advantageous in that there is almost no delay in resin injection when pressurizing, making it easy to make subtle adjustments to the resin injection rate.

[0063] (2) Furthermore, in Example 2, the flexible suction cup jig 300 itself is pushed and pulled against the scar 120, so there is almost no friction or rattle in the sliding direction, which was a problem in Patent Document 1. As a result, the suction cup jig 300 is significantly different from an injector with a sliding plunger, and discontinuous backlash is less likely to occur. Thus, Example 2 is superior in that it is structurally almost free of backlash, making it even easier to make subtle adjustments to the resin injection.

[0064] (3) In Example 2, a magnifying glass 210 is placed to face the back side of the scar 120. By reflecting the scar 120 onto the magnifying glass 210, an erect virtual image 120A that is an enlarged image of the back side of the scar 120 is reflected on the magnifying glass 210. Therefore, Example 2 is advantageous in that the scar 120 can be viewed as an enlarged erect virtual image 120A.

[0065] (4) In Example 2, the scar 120 is illuminated by turning on the illumination unit 210A in the peripheral space of the magnifying mirror 210 inside the dark vehicle 100. Therefore, the erect virtual image 120A reflected in the magnifying mirror 210 can be brightened. Therefore, Example 2 is superior in that even if the scenery outside the vehicle window 110 is reflected, the bright erect virtual image 120A can be easily recognized by the worker.

[0066] (5) In Example 2, the resin injection port is shaped to allow the resin to penetrate evenly and efficiently. Therefore, Example 2 is superior in that it can promote the replacement of the air in the crack with the resin during the suction cup suction process and the suction cup pressure application process.

[0067] (6) In Example 2, the resin can penetrate efficiently by opening up the blocked area in the crack of the scar 120 in advance. Therefore, Example 2 is superior in that it can promote the replacement of the air in the crack with the resin in the suction cup suction step and the suction cup pressure step.

[0068] Supplementary Notes on Embodiments In the above-described second embodiment, the explanation is based on the premise of a method for repairing scratches 120 that have occurred on a glass vehicle window 110. However, the object of the present invention is not limited to the vehicle window 110. For example, the scratch repair method of the present invention may be applied to an object made of acrylic or the like. Furthermore, the scratch repair method of the present invention may be applied to an object such as a building or furniture.

[0069] In the above-described embodiment, the explanation is given on the assumption that each process is performed by a worker. However, the present invention is not limited to this. For example, some or all of the processes performed by a worker may be automated by replacing them with an NC control device, a work robot, or the like.

[0070] The present invention is not limited to the above-described embodiments, but includes various modifications.

[0071] In particular, the above-described embodiments have been described in more detail than necessary to make the present invention easier to understand, and therefore the present invention is not limited to all of the configurations, steps, and explanations of the embodiments.

[0072] It is also possible to replace a part of one embodiment with a part of another embodiment, or to add a part or all of another embodiment to one embodiment. For example, one or more of the steps described above may be combined into one cycle, and the cycle may be repeated or repeated as necessary.

[0073] Furthermore, it is possible to add, delete, or replace other configurations or steps in some of the embodiments. [Explanation of symbols]

[0074] 100...vehicle, 110...vehicle window, 120...scar, 120A...erect virtual image, 210...magnifying glass, 210A...lighting unit, 210B...wireless remote control, 220...suction device, 230...flexible arm, 300...suction cup jig, 300A...suction cup recess, L...illumination light

Claims

1. A scar repair method for replacing air inside a scar that has occurred on an object with resin, comprising: As a pre-processing step, a scar shaping step of shaping the scar with a drilling bit; a scar cleaning step of dropping the resin onto the scar to clean it; a crack opening process in which the scar wetted with the resin is covered with a film to create a degassed state, and pressure is applied from above the film to open the closed crack in the scar, As a process to be performed after the pre-processing, a suction cup contact step of preparing a flexible suction cup-shaped jig (hereinafter referred to as the "suction cup jig"), pouring the liquid resin into a space (hereinafter referred to as the "suction cup recess") between the recessed inner wall of the suction cup jig and the object, and contacting the periphery of the suction cup jig with the object while aligning it with the scar; a suction cup suction step of reducing the pressure in the suction cup recess by pulling the suction cup jig toward the scar while maintaining an airtight state in which the periphery of the suction cup jig is in contact with the object, thereby drawing out any air remaining in the crack of the scar; a suction cup pressurizing step of pressing the suction cup jig against the scar to pressurize the suction cup recessed chamber while maintaining an airtight state in which the periphery of the suction cup jig is in contact with the object, thereby causing the resin in the suction cup recessed chamber to penetrate into the crack, By carrying out the pre-treatment in advance, the replacement of the air inside the scar with the resin in the suction cup suction step and the suction cup pressurization step is facilitated. A method for repairing scars.

2. A scar repair method for replacing air inside a scar that has occurred on an object with resin, comprising: a magnifying glass installation step in which, in a situation where the scar occurs on the transparent object and the scar can be seen through the object from the back, a magnifying glass and an illumination unit are arranged on the back side of the object on which the scar occurs (hereinafter referred to as the "front side"), and the scar is illuminated from the back side, thereby projecting an enlarged erect virtual image of the back side of the scar onto the magnifying glass; a suction cup contact step of preparing a flexible suction cup-shaped jig (hereinafter referred to as the "suction cup jig"), pouring the liquid resin into a space (hereinafter referred to as the "suction cup recess") between the recessed inner wall of the suction cup jig and the object, and contacting the periphery of the suction cup jig with the object while aligning it with the scar; a suction cup suction step of reducing the pressure in the suction cup recess by pulling the suction cup jig toward the scar while maintaining an airtight state in which the periphery of the suction cup jig is in contact with the object, thereby drawing out any air remaining in the crack in the scar; a suction cup pressurizing step of pressing the suction cup jig against the scar to pressurize the suction cup recessed chamber while maintaining an airtight state in which the periphery of the suction cup jig is in contact with the object, thereby causing the resin in the suction cup recessed chamber to penetrate into the crack, In the suction cup suction step, when the suction cup jig is pulled against the scar, a suction state of the air remaining in the crack is confirmed based on a change in the shadow of the erect virtual image; In the suction cup pressurizing step, the penetration state of the resin into the crack is confirmed based on a change in the shadow of the erect virtual image when the suction cup jig is pressed against the scar. A method for repairing scars.

3. The scar repair method according to any one of claims 1 to 2, As a post-processing step, a resin hardening process for hardening the resin replaced inside the scar; and a surface shaping step of shaping the repaired scar by cutting and / or polishing the resin that has hardened and protruded onto the surface of the scar. A method for repairing scars.

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