Method for manufacturing film-attached part and film pasting device

Abstract

To provide a method for manufacturing a film-attached part and a film pasting device, which are capable of efficiently pasting one piece of film over a plurality of surfaces while maintaining quality.SOLUTION: There is provided a method for manufacturing a film-attached part, comprising: a positioning step of positioning a film 8 facing a bottom surface portion 3 at a position on a side of an open portion 6 of a bent part 2; a holding step of holding both end portions 8c and 8d of the film 8 in a state where the film 8 is opened and stretched; a pressing step of pressing the film 8 from the side of the open portion 6 toward the bottom surface portion 3 at a pressing position 8e set between both end portions 8c and 8d of the film 8; a bottom surface pasting step of adjusting a tension of the film 8 when pasting the film 8 between two standing walls 5a and 5b to the bottom surface part 3 from the pressing position 8e as a starting point, and pasting the film 8 to the bottom surface portion 3; and a standing wall pasting step in which the end portions 8c and 8d of the film 8 are released from a holding state and the film 8 is pasted along inner surfaces of the standing walls 5a and 5b, respectively.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a method for manufacturing a film-attached part and a film bonding device. [Background technology]

[0002] Various methods and devices for laminating a resin film onto a flat member, etc., have been known in the past. For example, Patent Document 1 discloses a method and device for laminating a film pulled out from a film roll onto a flat unvulcanized rubber sheet transported by a supply conveyor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-46071 A Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, there has been a demand for attaching a continuous film to a part having multiple surfaces, such as a bottom surface and a side surface. For example, in a vehicle battery part, it may be required to attach an insulating resin film not only to the bottom surface but also to the vertical wall. However, when a film is attached to a flat member and then molded, the film tends to be torn or have holes, making it difficult to maintain quality. In addition, when a film is manually attached to a molded part, it is time-consuming to align the film attachment position and prevent air from entering between the part and the film. Therefore, a method for efficiently attaching a film to a part having multiple surfaces and an apparatus for doing so have been required.

[0005] The present invention was devised in consideration of these points, and the problem that the present invention aims to solve is to provide a method for manufacturing a film-coated part and a film application device that can efficiently apply a single film to multiple surfaces while maintaining quality. [Means for solving the problem]

[0006] One feature of the manufacturing method for a film-fitted part that solves the above-mentioned problems is that the film-fitted part is a folded part having a planar bottom portion, two upright walls extending upward from each of opposite side ends of the bottom portion, and an opening portion that is open on the upper side of the bottom portion, and a film is attached via adhesive or pressure-sensitive adhesive to the bottom portion and the inner faces of the two upright walls that are on the side of the opening portion. The manufacturing process for the part with film includes an arrangement process in which the film is arranged facing the bottom portion at a position on the open portion side of the folded part while being spaced apart from the bottom portion; a holding process in which both end edges of the film are held in a stretched state at respective positions above the two upright walls; a pressing process in which the stretching tension of the film is adjusted at a pressing position that is set on a straight line between both end edges of the film and parallel to the both end edges, and the film is pressed from the open portion side toward the bottom portion; a bottom attachment process in which the stretching tension of the film is adjusted to attach the film between the two upright walls to the bottom portion starting from the pressing position; and a vertical wall attachment process in which the both end edges of the film are released from the held state and the film is attached along the inner surfaces of each of the two upright walls.

[0007] One feature and advantage of the above process is that the film arranged facing the inner surface of the bottom surface of the bent part at a distance from the inner surface is held at both end edges of the film in a stretched state. A pressing position is set on the film between both end edges on a straight line parallel to both end edges. In the pressing process, the stretched film is pressed from the open part side toward the bottom surface at the pressing position. At this time, both end edges of the film held are pulled to the pressing position, so that the stretching tension is adjusted. The position at the bottom surface where the pressing position of the film is pressed is set as the starting point for starting attachment of the film. This makes it easy to determine the position at which the film is to be attached to the part, and can prevent the film from being misaligned. In the bottom surface attachment process, the stretching tension of the held film is adjusted when attaching the film between the two upright walls to the bottom surface, starting from the pressing position. This prevents the film from being pulled excessively, allows the film to be attached to the bottom surface without difficulty, and can prevent air from entering between the film attachment surface and the bottom surface. In the vertical wall attachment process, both end edges of the film are released from their respective holding states and attached to the vertical walls. Therefore, for a folded component having multiple surfaces, a single film can be efficiently attached from the bottom surface to the vertical walls, and a component with a film can be provided in which deviation in the attachment position of the film and infiltration of air are suppressed.

[0008] Regarding the above-mentioned method for manufacturing a part with a film, the holding step may be a manufacturing method in which both end edges of the film are held by holding parts that clamp and hold the end edges of the film from both sides, the pressing step may be a manufacturing method in which a bottom surface attachment part presses the pressing position against the bottom surface part, and the force with which the holding part clamps the end edges of the film is set to be greater than the force with which the end edges of the film are pulled toward the pressing position in the bottom surface attachment step, and the bottom surface attachment step may be a manufacturing method in which the bottom surface attachment part is moved along the bottom surface part to attach a film to the bottom surface part, and as the bottom surface attachment part moves, the holding part moves toward the pressing position while holding the end edges of the film.

[0009] One feature and advantage of the above process is that each edge of the film is held by being clamped from both sides by the holding parts. The pressing position of the film is pressed against the bottom part by the bottom attachment part. The bottom attachment part moves from the pressing position toward the standing wall along the bottom part, thereby attaching the film to the bottom part. In addition, as the bottom attachment part moves, the holding part moves to the pressing position side. At this time, the force with which the holding part clamps the edge of the film is set to be greater than the force with which the edge of the held film is pulled toward the pressing position side. This prevents the film from falling off the holding part in the bottom attachment process, and allows the tension of the film to be adjusted.

[0010] Regarding the above-mentioned method for manufacturing a part with a film, the vertical wall attachment process may be a manufacturing method in which a film is attached by a vertical wall attachment portion extending in a direction parallel to both side ends of the bottom surface portion and having a side portion facing the inner surface of the vertical wall, the force with which the holding portion clamps the edge portion of the film is set to be smaller than the force with which the edge portion of the film is pulled toward the pressing position in the vertical wall attachment process, and the vertical wall attachment process may be a manufacturing method in which the vertical wall attachment portion approaches the vertical wall while the holding portion moves toward the outside of the vertical wall while clamping the film between the vertical wall and the side portion, so that the edge portion of the film that is held comes out of the holding portion and the film is attached to the vertical wall.

[0011] One feature and advantage of the above process is that in the vertical wall attachment process, the side portion of the vertical wall attachment portion approaches the vertical wall, and the holding portion that holds the edge portion of the film moves outward from the vertical wall. At this time, the force that pulls the edge portion of the film toward the pressing position is greater than the force with which the holding portion clamps the edge portion of the film. As a result, the edge portion of the film that is being held comes out of the holding portion, and the remaining portion of the film that has been attached up to the bottom surface portion is attached to the vertical wall. Therefore, the film can be attached neatly up to the vertical wall while preventing the attached film from wrinkling or air from getting in.

[0012] Regarding the above-mentioned method for manufacturing a part with a film, the pressing position on the film may be set in the center between both end edges of the film, and the attachment start position of the bottom surface portion where attachment of the film begins may be located in the center between the two upright walls.

[0013] One feature and advantage of the above process is that the pressing position of the film is set in the center between both edge portions of the film. The application start position on the bottom surface portion is located in the center between the two upright walls. This allows the center of the held film to be pressed against the bottom surface portion while the force holding both edge portions of the film is uniform and the film is stretched. Therefore, the position of the held film is more stable, and the positioning for application can be more easily determined.

[0014] One feature of a film application device that solves the above problem is that, for a folding component having a planar bottom portion, two standing walls extending upward from opposite side ends of the bottom portion, and an opening portion that is open at the upper side of the bottom portion, a film is applied across the bottom portion and the inner faces of the two standing walls that are on the side of the opening portion, via an adhesive or pressure-sensitive adhesive. The film application device includes a positioning mechanism that positions the film facing the bottom portion at a position on the opening portion side of the folding component while being spaced apart from the bottom portion, a holding mechanism that holds both end edges of the film in a stretched state at respective positions above the two standing walls, and an application mechanism that applies the film across the bottom portion and the inner faces of the two standing walls. The attachment mechanism is configured to include a bottom attachment section that adjusts the tension of the film at a holding position that is set between both end edges of the film and on a straight line parallel to the both end edges to press the film from the open portion side toward the bottom portion, and moves along the bottom portion from the attachment start position of the bottom portion where the holding position is attached toward one of the vertical walls, and moves along the bottom portion toward the other vertical wall, and a vertical wall attachment section that attaches the film along the inner surfaces of each of the two vertical walls after the both end edges of the film have been released from the state where they are held by the holding mechanism.

[0015] One feature and advantage of the above configuration is that the film is arranged to face the inner surface of the bottom part of the folding component by the arrangement mechanism, and both end edges of the film are held by the holding mechanism in a stretched state. The pressing position is set on the film between both end edges on a straight line parallel to both end edges. The bottom surface attaching part presses the pressing position of the film in the stretched state from the open part side toward the bottom surface part. The position where the pressing position of the film is attached on the bottom surface part is set as the attachment start position. This makes it easy to determine the attachment position of the film on the folding component and prevents the attachment position of the film from shifting. The bottom surface attaching part moves toward one of the standing walls while pressing the film toward the bottom surface part. Accordingly, the film on one end edge side from the pressing position is attached to the bottom surface part. At this time, the tension of the film 8 is adjusted so that the held film is not pulled excessively. This allows the film to be attached to the bottom surface part without difficulty, and prevents air from entering between the attachment surface of the film and the bottom surface part. Furthermore, the edge portion of the film held by the holding mechanism is released from the held state, and the remaining portion of the film including the edge portion is attached to the inner surface of the standing wall. Similarly, the film on the other edge side from the holding position is attached to the bottom surface portion and the other standing wall. Therefore, it is possible to provide a film attachment device that can automatically and efficiently attach a single film to a folding component having multiple surfaces from the bottom surface portion to the standing wall, and can suppress deviation of the attachment position of the film and infiltration of air.

[0016] In the above-mentioned film application device, the holding mechanism is equipped with holding portions that clamp and hold the edge portion of the film from both sides, and is configured to move toward the holding position in conjunction with the movement of the bottom application portion when the bottom application portion presses the holding position of the film against the bottom application portion and when it moves from the application start position toward the upright wall, and the force with which the holding portions clamp the edge portion of the film may be greater than the force with which the edge portion of the film is pulled toward the holding position when the bottom application portion attaches the film to the bottom application portion.

[0017] One feature and advantage of the above configuration is that the film is held by clamping both end edge portions of the film by the holding portions. When the bottom attachment portion presses the pressing position of the film against the bottom portion, and when it moves from the attachment start position toward the standing wall, the holding portions move to the pressing position side in response to the movement of the bottom attachment portion. The force with which the holding portions clamp the edge portion of the film is set to be greater than the force with which the bottom attachment portion pulls the edge portion of the held film toward the pressing position side. This prevents the film from falling off the holding portions while the film is being attached to the bottom portion, and allows the tension of the film to be adjusted.

[0018] In the above-mentioned film attachment device, the holding portion is configured to maintain a constant force for clamping the edge portion of the film, and when the vertical wall attachment portion approaches the vertical wall, the holding portion moves outward from the vertical wall as the vertical wall attachment portion moves, and the force with which the holding portion clamps the edge portion of the film may be smaller than the force with which the edge portion of the film is pulled toward the pressing position when the vertical wall attachment portion attaches the film to the vertical wall.

[0019] One feature and advantage of the above configuration is that when the vertical wall attachment portion approaches the vertical wall, the holding portion that holds the edge of the film moves outward from the vertical wall. At this time, the holding portion moves in the opposite direction to the direction in which the edge is pulled by the vertical wall attachment portion while maintaining the force that pinches the edge of the film. As a result, the force that pulls the edge of the film toward the pressing position exceeds the force with which the holding portion pinches the edge of the film. Therefore, the edge of the film comes out of the holding portion and is attached to the vertical wall. Therefore, the film can be attached neatly up to the vertical wall while preventing the attached film from wrinkling or air from getting in.

[0020] In the above film bonding device, the bonding surface of the film may be adhesive, and the holding portion may have a lower clamping surface that contacts the bonding surface of the film and is made of fluororesin.

[0021] One feature and advantage of the above configuration is that the lower clamping surface of the holding portion is made of fluororesin. This can reduce the adhesion of the application surface of the film to the lower clamping surface. Therefore, when the edge of the film sandwiched in the holding portion is pulled out, the frictional resistance acting between the application surface of the film and the lower clamping surface can be reduced. This allows the film to be smoothly pulled out of the holding portion, and can suppress the occurrence of wrinkles and displacement of the film.

[0022] In the above-mentioned film application device, the holding portion may be configured so that peaks and valleys are alternately arranged along both side ends of the bottom portion on the lower clamping surface, and the peaks and valleys have a wave-like shape extending in a direction intersecting with both side ends of the bottom portion.

[0023] One feature and advantage of the above configuration is that a wave shape is formed on the lower clamping surface of the holding part. The wave shape has peaks and valleys alternately arranged along both side edges of the bottom part. The peaks and valleys extend in a direction intersecting with both side edges of the bottom part, i.e., in the direction in which the edge of the film is pulled. This reduces the contact area between the application surface of the film and the lower clamping surface, and reduces the frictional resistance acting between the application surface of the film and the lower clamping surface. This allows the film to be pulled out smoothly from the holding part.

[0024] In the film bonding device, the holding portion may be configured such that the peak of the mountain portion on the lower clamping surface has an R-shape.

[0025] One feature and advantage of the above configuration is that the wavy shape on the clamping surface of the holding part has peaks that are rounded, which makes it possible to prevent streaks from appearing in the contact areas between the peaks of the peaks on the application surface of the film when the film is pulled out from the holding part.

[0026] In the above-mentioned film joining device, the vertical wall joining portion may be configured to have a corner portion at its lower end portion formed at an angle smaller than that of the corner between the bottom portion and the vertical wall or at the same angle as that of the corner.

[0027] One feature and advantage of the above configuration is that the vertical wall attachment portion has a corner at the lower end. The corner is formed at an angle smaller than or equal to the angle of the corner between the bottom portion and the vertical wall. By pressing the corner against the corner between the bottom portion and the vertical wall of the component, the film can be attached to the component without creating a gap between the film and the corner.

[0028] In the above-mentioned film bonding device, the bonding mechanism may be configured such that the bottom surface bonding portion functions as the standing wall bonding portion.

[0029] One feature and advantage of the above configuration is that the bottom attachment portion and the vertical wall attachment portion are made of the same member, which can reduce the number of parts in the entire device. Effect of the Invention

[0030] By using the above-described steps and configuration, the present invention can provide a method for manufacturing a film-attached component and a film application device that can efficiently apply a single film to multiple surfaces while maintaining quality. [Brief description of the drawings]

[0031] [Figure 1] FIG. 2 is a perspective view showing a part with a film according to the embodiment. [Diagram 2] 1A to 1C are schematic diagrams showing the configuration of a film bonding device according to an embodiment, illustrating a process of placing a film. [Diagram 3] 1A and 1B are schematic diagrams showing the configuration of a film bonding device according to an embodiment, and are diagrams showing a process of bonding a pressing position of a film to a bottom surface portion. [Figure 4] 5A and 5B are diagrams showing the cross-sectional shape of a clamping surface of a holding portion according to the embodiment; [Diagram 5]5A to 5C are schematic diagrams showing the movement of a wall joining section and the movement of a holding section of the film joining device according to the embodiment. [Figure 6] 5A to 5C are schematic diagrams illustrating a film holding step according to an embodiment. [Figure 7] 5A to 5C are schematic diagrams illustrating a film pressing step according to the embodiment. [Figure 8] 4A to 4C are schematic diagrams illustrating a bottom surface attachment step in a first attachment step of the film according to the embodiment. [Figure 9] 6A to 6C are schematic diagrams illustrating a first standing wall attachment step of the film according to the embodiment. [Figure 10] 10A and 10B are schematic diagrams illustrating a bottom surface attachment step in a second attachment step of the film according to the embodiment. [Figure 11] 6A to 6C are schematic diagrams illustrating a second wall attaching step of the film according to the embodiment. [Figure 12] 13 is a schematic diagram showing a modified example of the joining mechanism of the film joining device. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] <Configuration of film-coated parts> Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the film-attached part 1 according to this embodiment is a part in which an insulating film 8 is attached to multiple surfaces of a bent part 2 formed, for example, from a metal plate-like member in a hat-shaped shape, and is used, for example, as a part for an automobile battery or the like. The bent part 2 has, for example, a bottom part 3 which is a flat surface of a substantially rectangular shape, a first standing wall 5a and a second standing wall 5b (two standing walls) which extend upward from both opposing side ends of the bottom part 3, and an opening part 6 which opens the upper side of the bottom part 3. Here, the side end part of the bottom part 3 is the outer periphery of the flat bottom part 3 having a certain area, and in this embodiment, two opposing sides of the four sides of the bottom part 3 which is a quadrangle correspond to both side ends. A flange part 7 extending outward is formed at the upper ends of the first standing wall 5a and the second standing wall 5b. In the part 1 with the film attached, for example, the film 8 is attached via an adhesive or a pressure sensitive adhesive across the bottom portion 3 and the inner surfaces of the first standing wall 5a and the second standing wall 5b on the side of the opening 6. For ease of explanation, the direction along both side ends of the bottom portion 3 is defined as the front-rear direction, and the direction intersecting both side ends of the bottom portion 3 is defined as the left-right direction.

[0033] The film 8 is a resin film, and is cut to a predetermined length so that it can be attached to the area extending between the bottom surface portion 3 and the inner surfaces of both standing walls 5a, 5b. As shown in FIG. 2, the left and right end edges 8c, 8d in the width direction (left and right direction) of the film 8 are attached to the standing walls 5a, 5b of the folding part 2, respectively. A pressing position 8e is set in the center between both end edges 8c, 8d on a straight line parallel to both end edges 8c, 8d. The area to the right of the pressing position 8e is the first film area 8a, and the area to the left of the pressing position 8e is the second film area 8b. The position of the bottom surface portion 3 where the pressing position 8e of the film 8 is pressed is the attachment start position 3a. The attachment start position 3a is located in the center between the first standing wall 5a and the second standing wall 5b.

[0034] <Film application device configuration> Next, the configuration of the film pasting device 10 will be described. The film pasting device 10 is a device that pastes the film 8 over the inner surface of the folding component 2 via an adhesive or a pressure sensitive adhesive. As shown in FIG. 2, the film pasting device 10 includes a base 12 on which the folding component 2 is placed, a placement mechanism that pulls out the film 8 from a roll R on which the strip-shaped film 8 is wound and places it on the open part 6 side of the folding component 2, a holding mechanism that holds both end parts 8c, 8d of the placed film 8, and a pasting mechanism that pastes the film 8 on the inner surface of the folding component 2. Although not shown, the placement mechanism, the holding mechanism, and the pasting mechanism each include a drive mechanism such as a motor or a cylinder, and a guide mechanism such as a shaft or a rail that guides the operation and movement of each part. FIGS. 2 to 12 are schematic diagrams in which the drive mechanism and the guide mechanism are omitted, and show the technical concept of the configuration and movement of each part described later.

[0035] The base 12 has a mounting surface 13 on which the folded part 2 is placed. The mounting surface 13 has a planar support surface 14 that supports the bottom part 3, and side surfaces 15 that support the standing walls 5a, 5b on the left and right of the support surface 14. By forming the mounting surface 13 in a shape that matches the folded part 2, the position of the placed folded part 2 is stabilized while the film 8 is attached to the folded part 2. The base 12 is positioned so that both end edges 8c, 8d in the width direction of the film 8 pulled out from the original roll R are located above both side surfaces 15 of the mounting surface 13.

[0036] The arrangement mechanism includes a clamping unit 16 that is configured with a pair of upper and lower plate-like members that extend in the left-right direction. The clamping unit 16 is configured to be movable in the front-rear direction by a driving mechanism such as a motor or a cylinder. The clamping unit 16 clamps the beginning end of the film 8 in the original roll R from both sides and pulls out the film 8 in a direction intersecting the width direction of the film 8 (front-rear direction). In this embodiment, the back side of the film 8 is adhesively processed and a release paper 9 is attached thereto, and when the film 8 is pulled out, the film 8 is arranged in a state in which the release paper 9 is peeled off. By moving the clamping unit 16 in the forward direction, the film 8 held by the holding units 20a and 20b is arranged facing the bottom part 3 at a position on the open part 6 side of the folding component 2 in a state of being separated from the bottom part 3. As a result, the attached surface 8g of the film 8 faces the inner surface of the bottom part 3. A cutter (not shown) that cuts the pulled out film 8 to a predetermined length is arranged behind the base 12.

[0037] 2 and 3, the holding mechanism includes holding parts 20a and 20b that sandwich and hold both sides that intersect with the pulled-out starting end, i.e., left and right end edges 8c and 8d of film 8, from both sides. Holding parts 20a and 20b are respectively disposed on the upper sides of left and right side surfaces 15 of base 12. Holding parts 20a and 20b are composed of a pair of upper and lower clamping members that extend in the front-to-rear direction, and open and close when upper holding part 21 moves up and down by a driving mechanism such as a cylinder.

[0038] The holding parts 20a and 20b have clamping surfaces 21a and 22a that clamp and support the film 8 from the front and back sides (attachment surface 8g), respectively. With reference to FIG. 4, the clamping surface 21a of the upper holding part 21 is formed as a flat surface. The clamping surface 22a (lower clamping surface) of the lower holding part 22 that contacts the attachment surface 8g of the film 8 is made of a fluororesin such as PTFE resin, and has a wave shape in which peaks 24 and valleys 25 are alternately arranged (in the front-rear direction) along both side ends of the bottom part 3. The peaks 24 and valleys 25 each extend in the left-right direction intersecting with both side ends of the bottom part 3, in other words, in the direction in which the edge parts 8c and 8d of the film 8 are pulled. The apex of the peaks 24 is formed in an R shape.

[0039] The right and left holding parts 20a, 20b hold the edge 8c of the first film region 8a located above the first standing wall 5a with the right holding part 20a, and hold the edge 8d of the second film region 8b located above the second standing wall 5b with the left holding part 20b, thereby holding the film 8 in a stretched state. Then, the pressing position 8e of the film 8 is pressed against the bottom part 3 by the bottom surface attachment part 30 described later, and while moving along the bottom surface part 3, the edge parts 8c, 8d of the film 8 are held and the stretching force of the film 8 is adjusted. The force with which the holding parts 20a, 20b hold the edge parts 8c, 8d of the film 8 is maintained constant until the film 8 is attached to each of the standing walls 5a, 5b.

[0040] Each of the holding portions 20a, 20b is connected via a support member to a guide mechanism such as a shaft extending in the left-right direction, and is configured to be movable in the left-right direction by a drive mechanism such as a motor or a cylinder. The holding portions 20a, 20b can move in the left-right direction while the upper holding portion 21 and the lower holding portion 22 hold the edge portions 8c, 8d of the film 8.

[0041] For example, when the bottom attachment part 30 presses the pressing position 8e of the film 8 against the bottom part 3 and when the bottom attachment part 30 moves from the attachment start position 3a toward the first standing wall 5a, the right holding part 20a moves toward the pressing position 8e (center side) in association with the movement of the bottom attachment part 30. Also, when the first standing wall attachment part 31 described later approaches the first standing wall 5a, the right holding part 20a moves toward the outside of the first standing wall 5a in association with the movement of the first standing wall attachment part 31. The force with which the right holding part 20a pinches the edge part 8c of the film 8 is set in advance to be greater than the force with which the edge part 8c of the film 8 is pulled toward the pressing position 8e when the bottom attachment part 30 attaches the film 8 to the bottom part 3, and smaller than the force with which the edge part 8c of the film 8 is pulled toward the pressing position 8e when the first standing wall attachment part 31 attaches the film 8 to the first standing wall 5a.

[0042] The left holding part 20b has a configuration similar to that of the right holding part 20a, and moves toward the pressing position 8e as the bottom surface attaching part 30 moves, and moves outward from the second standing wall 5b as the second standing wall attaching part 32 moves, which will be described later. The force with which the left holding part 20b clamps the edge part 8d of the film 8 is also set similarly to that of the right holding part 20a.

[0043] 3, the attachment mechanism includes a bottom attachment section 30, a first standing wall attachment section 31, and a second standing wall attachment section 32. The attachment mechanism attaches the first film region 8a on the right side (one edge 8c side) of a pressing position 8e set on a straight line parallel to both end edges 8c, 8d between both end edges 8c, 8d of the film 8, from the bottom surface section 3 to the first standing wall 5a. Also, the attachment mechanism attaches the second film region 8b on the left side (the other edge 8d side) of the pressing position 8e, from the bottom surface section 3 to the second standing wall 5b.

[0044] The bottom sticking unit 30 is, for example, a roller extending in a direction (front-rear direction) parallel to both side ends of the bottom part 3, and is configured to be rotatable around a rotation axis along the front-rear direction. The bottom sticking unit 30 is supported so as to be movable in the up-down direction and the left-right direction by a driving mechanism such as a motor or a cylinder. The bottom sticking unit 30 is disposed so as to follow the pressing position 8e of the film 8, and descends from a standby position above the base 12 to press the pressing position 8e of the film 8 against the bottom part 3 from the open part 6 side to stick the film to the bottom part 3. Thereafter, the bottom sticking unit 30 moves while rotating along the bottom part 3 from the sticking start position 3a where the pressing position 8e is pressed against the bottom part 3 toward the first standing wall 5a. As a result, the film first region 8a is stuck to the region on the right side of the sticking start position 3a of the bottom part 3. After the first region 8a of the film is attached to the bottom surface portion 3, the bottom surface attachment part 30 moves while rotating along the bottom surface portion 3 toward the second standing wall 5b. As a result, the second region 8b of the film is attached to the region of the bottom surface portion 3 to the left of the attachment start position 3a.

[0045] When the bottom attachment part 30 presses the pressing position 8e of the film 8 against the bottom part 3, and when it moves from the attachment start position 3a toward the first standing wall 5a, the edge part 8c of the film first region 8a is pulled toward the center. As a pulling force acts on the edge part 8c of the film, the right-side holding part 20a moves toward the center (leftward), and the tension of the film 8 is adjusted. This prevents the film 8 from being pulled excessively, and the film 8 can be attached to the bottom part 3 without difficulty. Similarly, when the bottom attachment part 30 presses the pressing position 8e of the film 8 against the bottom part 3, and when it moves from the attachment start position 3a toward the second standing wall 5b, the left-side holding part 20b moves toward the center (rightward), and the tension of the film 8 is adjusted.

[0046] The first standing wall attachment part 31 is made of a plate-like member extending in a direction (front-rear direction) parallel to both side ends of the bottom surface part 3, and is configured to be movable in the up-down direction and the left-right direction by a driving mechanism such as a motor or a cylinder. The lower end part of the first standing wall attachment part 31 is thin, and the corner part 31a is set at an angle smaller than the corner part 4 between the bottom surface part 3 and the first standing wall 5a, or at the same angle as the corner part 4. Furthermore, the right side of the lower end part has a side part 31b extending in the front-rear direction. The side part 31b faces the inner surface of the first standing wall 5a when the lower end part abuts against the bottom surface part 3. When the bottom surface attachment part 30 moves to the first standing wall 5a and turns back, the first standing wall attachment part 31 descends from a standby position above the first standing wall 5a. After the lower end part abuts against the bottom surface part 3, the first standing wall attachment part 31 moves to the right. The side surface portion 31b is in close proximity to the inner surface of the first standing wall 5a. By the side surface portion 31b being in close proximity to the first standing wall 5a, the edge portion 8c of the film 8 is pulled out from the holding portion 20a (holding mechanism) and the film first region 8a is attached along the surface of the first standing wall 5a.

[0047] The second standing wall attachment part 32 is made of a plate-like member extending in the front-rear direction like the first standing wall attachment part 31, and is configured to be movable in the up-down direction and the left-right direction by a driving mechanism such as a motor or a cylinder. The second standing wall attachment part 32 is configured and arranged symmetrically with the first standing wall attachment part 31, has a corner part 32a at the lower end, and has a side part 32b on the left side of the lower end. The side part 32b faces the inner surface of the second standing wall 5b when the lower end abuts against the bottom part 3. The second standing wall attachment part 32 descends from a standby position above the second standing wall 5b when the bottom surface attachment part 30 moves to the second standing wall 5b and turns back. The second standing wall attachment part 32 moves to the left after the lower end abuts against the bottom part 3. The side part 32b is close to the inner surface of the second standing wall 5b. As the side surface portion 32b approaches the second standing wall 5b, the edge portion 8d of the film 8 is pulled out from the holding portion 20b (holding mechanism), and the second film region 8b is attached along the surface of the second standing wall 5b.

[0048] When the first standing wall attachment part 31 approaches the first standing wall 5a, the right-side holding part 20a moves outward (to the right) from the first standing wall 5a in accordance with the movement of the first standing wall attachment part 31. At this time, a force pulling the edge part 8c of the film first region 8a toward the pressing position 8e side (center side) acts on the edge part 8c of the film first region 8a. In addition, frictional resistance acts on the holding surfaces 21a, 22a of the holding part 20a by being clamped by the holding part 20a. The force clamping the edge part 8c of the film 8 is set in advance so that the frictional resistance acting on the edge part 8c of the film 8 is not greater than the force pulling the edge part 8c of the film 8, and is maintained constant from the start of the attachment of the film 8. Then, as the holding part 20a moves outward from the first standing wall 5a, the force pulling the edge part 8c of the film 8 toward the pressing position 8e side acting on the edge part 8c of the film 8 exceeds the frictional resistance. When the second standing wall attachment part 32 approaches the second standing wall 5b, the left holding part 20b moves outward (to the left) from the second standing wall 5b in accordance with the movement of the second standing wall attachment part 32. At this time, the force clamping the edge part 8d of the second film region 8b is maintained constant from the start of attachment of the film 8.

[0049] <Manufacturing process for parts with film> Next, a method for manufacturing the film-attached component according to this embodiment will be described. The film-attached component 1 is formed by attaching one resin film 8 to multiple surfaces of the bent component 2 by the film attachment device 10 described above.

[0050] The folding part 2 is made of, for example, a metal plate-like member and is formed into a hat shape. The folding part 2 has, for example, a bottom surface 3 which is a substantially rectangular flat surface, a first standing wall 5a and a second standing wall 5b extending upward from opposite side ends of the bottom surface 3, and an opening 6 which is open on the upper side of the bottom surface 3. The first standing wall 5a and the second standing wall 5b have flanges 7 extending outward at their upper ends.

[0051] The manufacturing process of the film-attached part 1 includes a placement step, a holding step, a pressing step, a first attachment step, and a second attachment step. The first attachment step and the second attachment step each include a bottom attachment step and a standing wall attachment step.

[0052] In the arrangement step, referring to FIG. 2, a pair of clamping parts 16 (arrangement mechanism) clamps the start end of the strip-shaped film 8 along the width direction from the original roll R and pulls it out in the forward direction. When pulling out the film 8, the release paper 9 attached to the back surface of the film 8 is peeled off. Then, the film 8 is arranged facing the bottom surface part 3 at a position on the open part 6 side of the folding part 2 while being spaced apart from the bottom surface part 3. As a result, the attachment surface 8g of the film 8 faces the inner surface of the bottom surface part 3. A pressing position 8e is set in the center between both end edges 8c, 8d of the arranged film 8 on a straight line parallel to both end edges 8c, 8d. The area to the right of the pressing position 8e is the first film area 8a, and the area to the left of the pressing position 8e is the second film area 8b.

[0053] In the holding step, referring to Fig. 6, both end edge portions 8c, 8d of the arranged film 8 are held by the left and right holding portions 20a, 20b (holding mechanism). The holding portions 20a, 20b clamp and hold both end edge portions 8c, 8d of the film 8 from both the front and back sides at positions above the first standing wall 5a and the second standing wall 5b, respectively. Once the holding portions 20a, 20b have held the film 8, the clamping portion 16 releases the clamping of the starting end portion of the film 8. The film 8 is cut to a predetermined length by a cutter. The film 8 is held in a stretched state by the holding portions 20a, 20b.

[0054] The force with which the holding portions 20a, 20b clamp the edge portions 8c, 8d of the film 8 is set so as to be greater than the force with which the edge portions of the film 8 are pulled toward the pressing position 8e (toward the center) in the bottom surface attachment process and less than the force with which the edge portions 8c, 8d of the film 8 are pulled toward the pressing position 8e in the vertical wall attachment process, and is maintained constant until the film is attached to each of the vertical walls 5a, 5b.

[0055] In the pressing step, referring to FIG. 7, the tension of the film 8 is adjusted at the pressing position 8e of the film 8, and the film 8 is pressed from the open portion 6 side toward the bottom portion 3 by the bottom attachment part 30. Specifically, the bottom attachment part 30 is lowered from above the pressing position 8e of the film 8 in a stretched state. The bottom attachment part 30 is lowered to the bottom portion 3 while abutting against the pressing position 8e of the film 8, so that the pressing position 8e of the film 8 is attached to the bottom portion 3. At this time, the holding parts 20a and 20b move toward the pressing position 8e, and the tension of the film 8 is adjusted. The position where the film 8 is first attached on the bottom portion 3 is set as the attachment start position 3a. The attachment start position 3a is located in the center between the first standing wall 5a and the second standing wall 5b.

[0056] In the first attaching step, the film first region 8a is attached from the bottom surface portion 3 to the inner surface of the first standing wall 5a. Referring to FIG. 8, in the bottom attaching step in the first attaching step, the bottom attaching part 30 is moved from the attachment start position 3a of the bottom surface portion 3 toward the first standing wall 5a. As the bottom attaching part 30 moves, the right-side holding part 20a follows and moves toward the pressing position 8e (center side) while holding the edge part 8c of the film 8. This adjusts the stretching force so that the film first region 8a is not pulled excessively, and the film first region 8a is attached to the bottom surface portion 3 with the pressing position 8e of the film 8 as the starting point. The bottom attaching part 30 that has reached the vicinity of the first standing wall 5a changes its direction of movement to the left and returns to the attachment start position 3a.

[0057] In the first standing wall attaching step (standing wall attaching step in the first attaching step), the first film region 8a, which has been released from the state in which the edge portion 8c of the film 8 is held by the holding portion 20a, is attached along the inner side surface of the first standing wall 5a. Referring to FIG. 9, when the bottom surface attaching portion 30 turns back and returns to the attachment start position 3a, the first standing wall attaching portion 31 descends from the upper standby position toward the vicinity of the first standing wall 5a. After the corner portion 31a reaches the bottom surface portion 3 via the film 8, the first standing wall attaching portion 31 moves rightward while sandwiching the film 8 between the side surface portion 31b of the first standing wall attaching portion 31 and the first standing wall 5a, and approaches the first standing wall 5a. Accordingly, the right-side holding portion 20a also moves rightward.

[0058] In the bottom surface attachment step and the first standing wall attachment step, the force of the right-side holding part 20a clamping the edge part 8c of the film first region 8a is kept constant. As the first standing wall attachment part 31 and the right-side holding part 20a both move rightward, the force of pulling the edge part 8c of the film 8 toward the first standing wall attachment part 31 exceeds the frictional resistance acting by clamping with the right-side holding part 20a. As a result, the edge part 8c of the film 8 being held is pulled out of the holding part 20a, and the remaining part of the film first region 8a is attached along the inner surface of the first standing wall 5a by the first standing wall attachment part 31. In addition, the corner part 31a of the first standing wall attachment part 31 is aligned with the corner part 4 between the bottom surface part 3 and the second standing wall 5b, so that the film 8 is attached without any gaps up to the corner part 4. After the film 8 is attached to the first standing wall 5a, the first standing wall attaching section 31 rises and returns to the standby position.

[0059] In the second attaching step, the second film region 8b is attached from the bottom surface portion 3 to the inner surface of the second standing wall 5b. Referring to FIG. 10, in the bottom attaching step in the second attaching step, the bottom attaching part 30 is moved from the attachment start position 3a of the bottom surface portion 3 toward the second standing wall 5b. As the bottom attaching part 30 moves, the left holding part 20b follows and moves toward the pressing position 8e (center side) while holding the edge part 8d of the film 8. This adjusts the stretching force so that the second film region 8b is not pulled excessively, and the second film region 8b is attached to the bottom surface portion 3 with the pressing position 8e of the film 8 as the starting point. The bottom attaching part 30 that has reached the vicinity of the second standing wall 5b changes its direction of movement to the right and retreats.

[0060] In the second standing wall attaching step (standing wall attaching step in the second attaching step), the second film region 8b, which has been released from the state in which the edge portion 8d of the film 8 is held by the holding portion 20b, is attached along the inner side surface of the second standing wall 5b. Referring to FIG. 11, when the bottom surface attaching portion 30 is folded back and retreated, the second standing wall attaching portion 32 descends from the upper standby position. After the corner portion 32a of the second standing wall attaching portion 32 reaches the bottom surface portion 3 via the film 8, the second standing wall attaching portion 32 moves leftward while sandwiching the film 8 between the side surface portion 32b of the second standing wall attaching portion 32 and the second standing wall 5b, and approaches the second standing wall 5b. Accordingly, the left holding portion 20b also moves leftward.

[0061] In the bottom surface attachment step and the second standing wall attachment step, the force of the left holding part 20b clamping the edge part 8d of the film second region 8b is maintained constant. As the second standing wall attachment part 32 and the left holding part 20b both move leftward, the force of pulling the edge part 8d of the film 8 toward the second standing wall attachment part 32 exceeds the frictional resistance acting by clamping the edge part 8d of the film 8 with the left holding part 20b. As a result, the edge part 8d of the held film 8 is pulled out of the holding part 20b, and the remaining part of the film second region 8b is attached along the inner surface of the second standing wall 5b. In addition, the corner part 32a of the second standing wall attachment part 32 is aligned with the corner part 4 between the bottom surface part 3 and the second standing wall 5b, so that the film 8 is attached without any gaps up to the corner part 4. After the film 8 is attached to the second standing wall 5b, the second standing wall attaching section 32 rises and returns to the standby position.

[0062] As shown in FIG. 12, the sticking mechanism of the film sticking device 10 may be configured such that the bottom sticking part functions as the standing wall sticking part. That is, the bottom sticking part and the standing wall sticking part are integrally formed by one and the same member. The integrated sticking part 40 has a corner part 40a formed at the lower end, and the thickness of the lower end is thin. The corner part 40a is set at an angle smaller than the corner part 4 between the bottom part 3 and the standing walls 5a, 5b, or at the same angle as the corner part 4. In addition, the lower end of the sticking part 40 has a side part 40b that faces the inner side surface of the first standing wall 5a or the second standing wall 5b.

[0063] When the film 8 is attached to the folding part 2 by the integrated attachment unit 40, in the pressing step, the attachment unit 40 descends from an upper standby position and attaches the pressing position 8e of the film 8 to the attachment start position 3a of the bottom surface portion 3. In the first attachment step, the attachment unit 40 moves along the bottom surface portion 3 from the attachment start position 3a toward the first standing wall 5a, and the right-side holding unit 20a moves leftward. This causes the first film region 8a to be attached to the bottom surface portion 3. When the attachment unit 40 reaches the vicinity of the first standing wall 5a, both the attachment unit 40 and the holding unit 20a move rightward. This causes the remaining portion of the first film region 8a to be attached to the first standing wall 5a.

[0064] In the second attaching step, the attaching portion 40, which was retracted after the first attaching step, is changed in orientation so that the side portion 40b faces the inner surface of the second standing wall 5b, and then returned to the attaching start position 3a and moved toward the second standing wall 5b. When the attaching portion 40 reaches the vicinity of the second standing wall 5b, both the attaching portion 40 and the holding portion 20b move leftward. This causes the second film region 8b to be attached to the bottom portion 3 and the second standing wall 5b.

[0065] <Effects of the embodiment> According to the film pasting device 10 of the embodiment, the film 8 is placed facing the inner surface of the bottom surface portion 3 of the folding component 2 by the placement mechanism, and the both end edges 8c, 8d of the film 8 are held by the holding mechanism in a stretched state. The pressing position 8e is set on the film 8 between the both end edges 8c, 8d on a straight line parallel to the both end edges 8c, 8d. The pressing position 8e of the film 8 in the stretched state is pressed against the bottom surface portion 3 from the open portion 6 side by the bottom surface pasting unit 30. The position where the pressing position 8e of the film 8 is pressed against the bottom surface portion 3 is set as the pasting start position 3a. This makes it easy to determine the position of the pasting position of the film 8 with respect to the folding component 2, and can prevent the pasting position of the film 8 from shifting. The bottom surface pasting unit 30 moves toward one of the standing walls (for example, the first standing wall 5a) while pressing the film 8 against the bottom surface portion 3. Accordingly, the film 8 (for example, the film first region 8a) on one edge portion 8c side from the pressing position 8e is attached to the bottom surface portion 3. At this time, the tension of the film 8 is adjusted so that the held film 8 is not pulled excessively. This allows the film 8 to be attached to the bottom surface portion 3 without difficulty, and prevents air from entering between the attachment surface 8g of the film 8 and the bottom surface portion 3. Furthermore, the edge portion 8c of the film 8 held by the holding mechanism (holding portion 20a) is released from the held state, and the remaining part of the film 8 including the edge portion 8c is attached to the inner surface of the standing wall 5a. In the same manner, the film 8 (for example, the film second region 8b) on the other edge portion 8d side from the pressing position 8e is also attached to the bottom surface portion 3 and the other standing wall (for example, the second standing wall 5b). Therefore, a film application device 10 can be provided that can automatically and efficiently apply a sheet of film 8 to a folded part 2 having multiple surfaces from the bottom portion 3 to the vertical walls 5a, 5b, while suppressing deviation in the application position of the film 8 and the intrusion of air.

[0066] In the film pasting device 10, both end edge portions 8c, 8d of the film 8 are sandwiched by the holding portions 20a, 20b from both sides, so that the film 8 is held. When the bottom pasting portion 30 presses the pressing position 8e of the film 8 against the bottom portion 3, and when the bottom pasting portion 30 moves from the pasting start position 3a toward the standing walls 5a, 5b, the holding portions 20a, 20b move to the pressing position 8e side in accordance with the movement of the bottom pasting portion 30. The force with which the holding portions 20a, 20b sandwich the end edge portions 8c, 8d of the film 8 is set to be larger than the force with which the bottom pasting portion 30 pulls the held end edge portions 8c, 8d of the film 8 toward the pressing position 8e side. This prevents the film 8 from falling off the holding portions 20a, 20b while the film 8 is pasted to the bottom portion 3, and allows the tension of the film 8 to be adjusted.

[0067] In the film pasting device 10, when the vertical wall pasting parts 31, 32 approach the vertical walls 5a, 5b, the holding parts 20a, 20b holding the edge parts 8c, 8d of the film 8 move outward from the vertical walls 5a, 5b. At this time, the holding parts 20a, 20b move in the opposite direction to the direction in which the edge parts 8c, 8d are pulled by the vertical wall pasting parts 31, 32 while maintaining the force of pinching the edge parts 8c, 8d of the film 8. As a result, the force of pulling the edge parts 8c, 8d of the film 8 toward the pressing position 8e exceeds the force of the holding parts 20a, 20b pinching the edge parts 8c, 8d of the film 8. Therefore, the edge parts 8c, 8d of the film 8 come out of the holding parts 20a, 20b and are pasted to the vertical walls 5a, 5b. Therefore, the film 8 can be neatly pasted up to the vertical walls 5a, 5b while preventing the pasted film 8 from wrinkling or air from entering.

[0068] In the holding parts 20a and 20b of the film bonding device 10, the clamping surface 22a of the lower holding part 22 is made of fluororesin. This can reduce the adhesion of the application surface 8g of the film 8 to the clamping surface 22a of the lower holding part 22. Therefore, when the edge parts 8c and 8d of the film 8 sandwiched between the holding parts 20a and 20b are pulled out, the frictional resistance acting between the application surface 8g of the film 8 and the clamping surface 22a of the lower holding part 22 can be reduced. Therefore, the film 8 can be smoothly pulled out from the holding parts 20a and 20b (removed from the held state).

[0069] The holding parts 20a and 20b of the film sticking device 10 have a corrugated shape formed on the clamping surface 22a of the lower holding part 22. In the corrugated shape, peaks 24 and valleys 25 are alternately arranged along both side ends of the bottom part 3. The peaks 24 and valleys 25 extend in a direction intersecting with both side ends of the bottom part 3, that is, along a direction in which the edge parts 8c and 8d of the film 8 are pulled. This reduces the contact area between the sticking surface 8g of the film 8 and the clamping surface 22a of the lower holding part 22, and reduces the frictional resistance acting between the sticking surface 8g of the film 8 and the clamping surface 22a of the lower holding part 22. This allows the film 8 to be smoothly pulled out from the holding parts 20a and 20b (removed from the held state).

[0070] In the holding parts 20a and 20b of the film bonding device 10, the apex of the peak 24 on the clamping surface 22a of the lower holding part 22 is formed in an R shape. This can prevent streaks from being generated in the contact part between the apex of the peak 24 and the bonding surface 8g of the film 8 when the film 8 is pulled out from the holding parts 20a and 20b.

[0071] The first standing wall attaching section 31 and the second standing wall attaching section 32 of the film attaching device 10 have corners 31a, 32a at their lower ends. By pressing the corners 31a, 32a against the bottom surface 3 of the folding component 2 and the corners 4 of the standing walls 5a, 5b, the film 8 can be attached to the folding component 2 without creating a gap between the film 8 and the corners 4.

[0072] The application mechanism of the film application device 10 may be configured so that the bottom application section functions as the standing wall application section. For example, the integrated application section 40 has the bottom application section and the standing wall application section configured from the same member. This can reduce the number of parts in the entire device.

[0073] According to the manufacturing process of the film-attached part 1 according to the embodiment, the film 8 arranged to face the inner surface of the bottom part 3 of the bent part 2 is held at both end edges 8c, 8d of the film 8 in a stretched state. A pressing position 8e is set on the film 8 between both end edges 8c, 8d on a straight line parallel to both end edges 8c, 8d. In the pressing process, the stretched film 8 is pressed against the bottom part 3 from the open part 6 at the pressing position 8e. At this time, both end edges 8c, 8d of the film 8 held are pulled to the pressing position 8e, so that the stretching force is adjusted. The position at the bottom part 3 where the pressing position 8e of the film 8 is pressed is set as the attachment start position 3a. This makes it easy to determine the attachment position of the film 8 relative to the bent part 2, and prevents the attachment position of the film 8 from being shifted. In the bottom surface attachment step, the tension of the held film 8 is adjusted when attaching the film 8 between the two standing walls 5a, 5b to the bottom surface portion 3, starting from the pressing position 8e. This prevents the film 8 from being pulled excessively, allowing the film 8 to be attached to the bottom surface portion 3 without difficulty, and also prevents air from entering between the attachment surface 8g of the film 8 and the bottom surface portion 3. In the standing wall attachment step, both end edges 8c, 8d of the film 8 are released from their respective held states and attached to the standing walls 5a, 5b. Therefore, a film-attached component 1 can be provided in which a single film 8 can be efficiently attached to a bent component 2 having multiple surfaces from the bottom surface portion 3 to the standing walls 5a, 5b, and deviation of the attachment position of the film 8 and infiltration of air are suppressed.

[0074] In the manufacturing process of the film-attached part, the edge portions 8c, 8d of the film 8 are sandwiched and held by the holding portions 20a, 20b from both sides. The pressing position 8e of the film 8 is pressed against the bottom portion 3 by the bottom attachment portion 30. The bottom attachment portion 30 moves along the bottom portion 3 from the pressing position 8e toward the standing walls 5a, 5b, so that the film 8 is attached to the bottom portion 3. In addition, as the bottom attachment portion 30 moves, the holding portions 20a, 20b move to the pressing position 8e side. At this time, the force with which the holding portions 20a, 20b sandwich the edge portions 8c, 8d of the film 8 is set to be larger than the force with which the edge portions 8c, 8d of the film 8 being held are pulled toward the pressing position 8e side. This prevents the film 8 from falling off the holding portions 20a, 20b in the bottom attachment process, and allows the tension of the film 8 to be adjusted.

[0075] In the manufacturing process of the film-attached part, for example, in the vertical wall attaching step in the first attaching step, the side portion 31b of the first vertical wall attaching portion 31 approaches the vertical wall 5a, and the holding portion 20a holding the edge portion 8c of the film 8 moves outward from the first vertical wall 5a. At this time, the force pulling the edge portion 8c of the film 8 toward the pressing position 8e acts greater than the force with which the holding portion 20a clamps the edge portion 8c of the film 8. As a result, the held edge portion 8c of the film 8 comes out of the holding portion 20a, and the remaining portion of the film first region 8a attached to the bottom portion 3 is attached to the first vertical wall 5a. In the vertical wall attaching step in the second attaching step, the remaining portion of the film second region 8b attached to the bottom portion 3 is attached to the second vertical wall 5b in the same manner. Therefore, the film 8 can be neatly attached to the vertical walls 5a and 5b while preventing the attached film 8 from wrinkling or air from entering.

[0076] In the manufacturing process for the film-attached part, the pressing position 8e of the film 8 is set in the center between both end edges 8c, 8d of the film 8. The attachment start position 3a on the bottom surface portion 3 is located in the center between the two standing walls 5a, 5b. This makes it possible to press the vicinity of the center of the held film 8 against the bottom surface portion 3 while the force holding both end edges 8c, 8d of the film 8 is uniform and the film 8 is stretched. Therefore, the position of the held film 8 becomes more stable, and the positioning for attachment can be determined more easily.

[0077] The holding mechanism of the film bonding device 10 is configured such that both end edge portions 8c, 8d of the film 8 are held by being sandwiched from both sides by the holding portions 20a, 20b, respectively. For example, the force for holding the end edge portion 8c of the film 8 is preset so that the frictional resistance acting on the end edge portion 8c of the film 8 is not greater than the force pulling the end edge portion 8c of the film 8, and is maintained constant from the start of bonding of the film 8. Then, as the holding portion 20a moves outward from the standing walls 5a, 5b, the force acting on the end edge portion 8c of the film 8 to pull it toward the pressing position 8e exceeds the frictional resistance. In this way, by adjusting and setting in advance the force for holding the end edge portions 8c, 8d of the film 8, the film 8 can be smoothly pulled out from the holding portions 20a, 20b (released from the held state), and the occurrence of wrinkles, displacement, etc. of the film 8 can be suppressed.

[0078] The method for manufacturing a film-attached part according to the present invention is not limited to the appearance, configuration, etc. described in the above embodiment, but can be embodied in various other forms by various modifications, additions, deletions, and combinations of configurations without changing the gist of the present invention.

[0079] The material of the clamping surface 22a of the lower holding part 22 according to the above embodiment is not limited to PTFE resin, and other types of fluororesin may be selected. The entire lower holding part 22 including the clamping surface 22a may be made of fluororesin. The shape of the clamping surface 22a of the lower holding part 22 is not limited to a corrugated shape, and may be other shapes as long as the shape reduces the frictional resistance when the film 8 is pulled out.

[0080] In the standing wall attaching step, the film 8 may be attached to the first standing wall 5a and the second standing wall 5b in a state where the holding mechanism is released from holding the edge portions 8c, 8d of the film 8. The first standing wall attaching unit 31 and the second standing wall attaching unit 32 may be configured to attach the film 8 to the first standing wall 5a and the second standing wall 5b, respectively, when descending from the standby position. The corner portions 31a, 32a or the side portions 31b, 32b may be configured to rise along the inner side surfaces of the first standing wall 5a and the second standing wall 5b, thereby attaching the film 8.

[0081] The pressing position 8e for starting attachment of the film 8 and the attachment start position 3a on the bottom surface portion 3 are not limited to the centers of the film 8 and the bottom surface portion 3, respectively, and may be set at positions shifted to the left or right. For example, a position closer to the first standing wall 5a or the second standing wall 5b on the bottom surface portion 3 may be set as the attachment start position 3a.

[0082] In the manufacturing process of the film-attached part, after the pressing step, the first attaching step of attaching the film first region 8a may be performed first, or the second attaching step of attaching the film second region 8b may be performed first.

[0083] The film bonding process may be performed by, for example, a robot having a hand unit that moves three-dimensionally, without being limited to the film bonding device 10 according to the above embodiment.

[0084] The arrangement mechanism in the film bonding device 10 may be configured to pull out the film while holding it by suction, instead of using the clamping section 16 that pulls out the film.

[0085] The bottom surface bonding section 30 in the film bonding device 10 may be configured, for example, of a member having a spatula-shaped tip instead of a roller.

[0086] The shape of the part with the film is not limited to a hat shape, and may be, for example, a shape without a flange portion. Furthermore, the shape of the bottom surface is not limited to a substantially rectangular shape, and may be, for example, a quadrilateral shape such as a square, a parallelogram, or a trapezoid, or a polygon, or other shape. [Explanation of symbols]

[0087] 1 Parts with film 2 Bent parts 3 Bottom part 3a Starting position for application 4 Corner 5a 1st standing wall 5b Second Standing Wall 6 Open area 7 Flange 8. Film 8a Film 1st Area 8b Film 2nd Area 8c Edge of film 8d Film edge 8e Pressing position 10 Film application device 12 Foundation 13 Placement surface 14 Support surface 15 Side 16 Clamping part (placement mechanism) 20a Holding part (holding mechanism) 20b Holding part (holding mechanism) 21 Upper holding part 21a Clamping surface 22 Lower holding part 22a Clamping surface 24 Yamabe 25 Valley 30 Bottom attachment part (attachment mechanism) 31 First vertical wall attachment section (attachment mechanism) 31a Corner 31b Side part 32 Second vertical wall attachment section (attachment mechanism) 32a Corner 32b Side part 40 Pasting section (pasting mechanism) 40a Corner 40b Side face

Claims

1. A flat bottom surface portion; Two upright walls extending upward from opposite side ends of the bottom surface portion, and a bent part having an opening portion that is open on the upper side of the bottom surface part, A method for manufacturing a film-attached part, comprising the steps of: attaching a film to the bottom surface portion and to an inner surface of one of the two upright walls that is on the open portion side, using an adhesive or a pressure-sensitive adhesive; a positioning step of positioning the film facing the bottom surface portion at a position on the opening side of the bent component while being spaced apart from the bottom surface portion; a holding step of holding both end edges of the film in a stretched state at positions above the two upright walls, respectively; a pressing step of pressing the film from the open portion toward the bottom portion by adjusting the tension of the film at a pressing position set on a straight line between both end edges of the film and parallel to the both end edges; A bottom attachment process in which, when attaching the film between the two standing walls to the bottom portion starting from the pressing position, the tension of the film is adjusted to attach the film; and a standing wall attachment step of releasing both end edges of the film from the held state and attaching the film along the inner side surfaces of each of the two standing walls.

2. A method for producing a film-attached part according to claim 1, The holding step includes holding both end edges of the film by holding portions that sandwich and hold the end edges of the film from both sides, The pressing step includes pressing the pressing position against the bottom surface portion by a bottom surface attachment unit, a force with which the edge portion of the film is pinched by the holding portion is set to be greater than a force with which the edge portion of the film is pulled toward the pressing position in the bottom surface attaching step; The bottom surface attachment process is a method for manufacturing a part with a film, in which a film is attached to the bottom surface by moving the bottom surface attachment part along the bottom surface, and as the bottom surface attachment part moves, the holding part moves toward the pressing position while holding an edge portion of the film.

3. A method for producing a film-attached part according to claim 2, comprising the steps of: The upright wall attaching step includes attaching a film by an upright wall attaching portion that extends in a direction parallel to both side ends of the bottom surface portion and has a side surface portion that faces an inner surface of the upright wall, a force with which the edge portion of the film is pinched by the holding portion is set to be smaller than a force with which the edge portion of the film is pulled toward the pressing position in the standing wall attaching step, The vertical wall attachment process is a method for manufacturing a part with a film, in which the vertical wall attachment portion approaches the vertical wall while the holding portion moves outward from the vertical wall while sandwiching the film between the vertical wall and the side portion, thereby causing an edge portion of the held film to come out of the holding portion and the film to be attached to the vertical wall.

4. A method for producing a film-attached part according to any one of claims 1 to 3, A method for manufacturing a part with a film, wherein the pressing position on the film is set in the center between both end edges of the film, and the attachment start position of the bottom surface portion where the attachment of the film begins is located in the center between the two upright walls.

5. A flat bottom surface portion; Two upright walls extending upward from opposite side ends of the bottom surface portion, and a bent part having an opening portion that is open on the upper side of the bottom surface part, A film pasting device that pastes a film across the bottom surface portion and the inner surfaces of the two standing walls that are on the open portion side, using an adhesive or a pressure-sensitive adhesive, a positioning mechanism for positioning the film facing the bottom surface portion at a position on the opening side of the folding component while being spaced apart from the bottom surface portion; a holding mechanism for holding both end edges of the film in a stretched state at positions above the two upright walls; a bonding mechanism for bonding the film to the bottom surface portion and to the inner surfaces of the two standing walls, The attachment mechanism includes: a bottom attachment section that adjusts the tension of the film at a pressing position that is set between both end edges of the film and on a straight line parallel to the both end edges to press the film from the open portion side toward the bottom section, and moves along the bottom section from a sticking start position of the bottom section where the pressing position is attached toward one of the standing walls, and moves along the bottom section toward the other standing wall; and a standing wall attachment section that attaches the film along the inner surfaces of each of the two standing walls after both end portions of the film have been released from the state in which they are held by the holding mechanism.

6. The film bonding device according to claim 5, the holding mechanism includes holding portions that hold the edge portions of the film by clamping them from both sides, the holding portion is configured to maintain a constant force for pinching the edge portion of the film, and to move toward the pressing position in accordance with the movement of the bottom surface attaching portion when the bottom surface attaching portion presses the pressing position of the film against the bottom surface portion and when the bottom surface attaching portion moves from the attachment start position toward the standing wall, A film joining device, wherein the force with which the holding portion clamps the edge portion of the film is greater than the force with which the edge portion of the film is pulled toward the pressing position when the bottom joining portion joins the film to the bottom portion.

7. 7. The film bonding device according to claim 6, The holding portion is The force clamping the edge of the film is maintained constant; When the standing wall attachment portion approaches the standing wall, the standing wall attachment portion moves outward from the standing wall in accordance with the movement of the standing wall attachment portion, a force with which the holding portion pinches the edge portion of the film is smaller than a force with which the edge portion of the film is pulled toward the pressing position when the standing wall attaching portion attaches the film to the standing wall.

8. The film bonding device according to claim 7, The application surface of the film has adhesive properties, The holding portion has a lower clamping surface that contacts the application surface of the film and is made of fluororesin.

9. 9. The film bonding device according to claim 8, The holding portion has a lower clamping surface having alternating peaks and valleys arranged along both side ends of the bottom portion, and the peaks and valleys have a wave-like shape extending in a direction intersecting with both side ends of the bottom portion.

10. 10. The film bonding device according to claim 9, A film joining device, wherein the holding portion has an apex of the peak portion on the lower clamping surface that is rounded.

11. The film bonding device according to any one of claims 5 to 10, The vertical wall attachment portion has a corner portion at a lower end portion thereof formed at an angle smaller than or equal to the angle of the corner portion between the bottom portion and the vertical wall.

12. The film bonding device according to claim 11, The application mechanism is configured such that the bottom surface application portion functions as the standing wall application portion.

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