Window structure and method for manufacturing the same

Abstract

To provide a window structure which can suppress the complexity of a manufacturing process and an increase in manufacturing cost, and which can inhibit an adhesive for attaching organic glass from spoiling appearance.SOLUTION: A window structure includes: an outer panel 4 having a window hole 4a; organic glass 3 attached to the outer panel 4 so as to close the window hole 4a; and an adhesive 6 positioned between the organic glass 3 and the outer panel 4. In a direction from the outer peripheral edge of the organic glass 3 toward the center side thereof, the following regions are positioned side by side in order: a first region 5a in which the adhesive 6 adheres closely to the organic glass 3 and the outer panel 4; a second region 5b which is made narrower than the first region 5a by a first protrusion 3c, and in which the adhesive 6 adheres closely to the first protrusion 3c and the outer panel 4; a third region 5c in which a space 8 separating the organic glass 3 from the adhesive 6 is interposed between the organic glass 3 and the adhesive 6; and a fourth region 5d in which the tip of a second protrusion 3e abuts on the outer panel 4 without interposing the adhesive 6 therebetween.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a window structure and a method for manufacturing the same.

Background Art

[0002] In the windows of vehicles such as automobiles, in order to mainly reduce the weight, a plate-like member made of a transparent or translucent resin (referred to as organic glass or resin glass) may be used instead of glass. Patent Document 1 discloses a configuration in which a window provided with a panel body made of a resin mainly composed of polycarbonate is provided on a sliding door of an automobile. Usually, an adhesive is used to attach organic glass made of a synthetic resin such as polycarbonate or acrylic resin to a vehicle body panel (outer panel) of an automobile.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] It is difficult to form an adhesive for adhering organic glass to an outer panel in a neat outer shape. If the adhesive that has spread in an irregular shape is visible from the outside of the vehicle, the aesthetic appearance may be impaired. Also, in some cases, it is not preferable that a part of a structure such as an outer panel is visible through the organic glass. Therefore, as shown in FIG. 5, a colored layer 14 made of black ceramic or the like is provided on the organic glass 11 so as to cover the adhesive 13 for adhering the organic glass 11 to the outer panel 12 and its periphery. A coating layer 15 that blocks ultraviolet rays and enhances weather resistance is provided on the surface of the organic glass 11. By disposing the colored layer 14 made of black ceramic or the like between the organic glass 11 and the adhesive 13, it is possible to suppress the impairment of the aesthetic appearance, but the manufacturing process becomes complicated and the manufacturing cost increases.

[0005] Therefore, an object of the present invention is to provide a window structure and a manufacturing method thereof that can suppress deterioration of aesthetics due to an adhesive for attaching an organic glass while suppressing the complexity of the manufacturing process and an increase in manufacturing cost.

Means for Solving the Problems

[0006] The window structure of the present invention includes an outer panel having a window hole, a synthetic resin-made organic glass having translucency and attached to the outer panel so as to close the window hole, and an adhesive located between the organic glass and the outer panel. The organic glass is provided with a first convex portion and a second convex portion that protrude toward the outer panel. In a portion where the organic glass and the outer panel overlap, in a direction from the outer peripheral edge of the organic glass toward the center side, there are a first region where the adhesive is in close contact with the organic glass and the outer panel, a second region where the dimension in the overlapping direction of the organic glass and the outer panel due to the first convex portion is narrower than that of the first region, and the adhesive is in close contact with the first convex portion and the outer panel, a third region where the outer panel is in close contact with the adhesive and a space for isolating the organic glass and the adhesive is interposed between the organic glass and the adhesive, and a fourth region where the tip of the second convex portion abuts on the outer panel without interposing the adhesive, which are arranged in order.

[0007] In a portion where the organic glass and the outer panel overlap, a fifth region where a space where no adhesive exists is formed between the organic glass and the outer panel may be further provided on the center side of the organic glass than the fourth region.

[0008] The organic glass may be provided with a first concave portion constituting the first region, the first convex portion constituting the second region, a second concave portion constituting the third region, the second convex portion constituting the fourth region, and a third concave portion constituting the fifth region arranged in order in a direction from the outer peripheral edge toward the center side.

[0009] The third recess may have a curved concave shape.

[0010] The first convex portion and the second convex portion may have a semicircular, semi-elliptical or semi-oval cross-sectional shape.

[0011] The outer panel may be provided with a first opposing convex portion facing the first convex portion and a second opposing convex portion facing the second convex portion.

[0012] The surface of the outer panel facing the organic glass may be a flat plane.

[0013] The adhesive is colored. The first region is a region where the color of the adhesive can be seen from the outside of the organic glass. The second region is a region for adjusting the flow of the adhesive from the first region to the third region. The third region is a region where a lighter color than the first region and the second region can be seen from the outside of the organic glass. The fourth region may be a region that does not exhibit the color of the adhesive.

[0014] The window structure may constitute a filler window for the back door of an automobile.

[0015] The manufacturing method of a window structure having an organic glass made of a synthetic resin with translucency according to the present invention includes a step of attaching the organic glass to an outer panel so as to close a window hole provided in the outer panel using an adhesive. The organic glass is provided with a first convex portion and a second convex portion protruding toward the outer panel. In a portion where the organic glass and the outer panel overlap, in a direction from the outer peripheral edge of the organic glass toward the center side, a first region where the adhesive is brought into close contact with the organic glass and the outer panel, a dimension in the direction in which the organic glass and the outer panel overlap due to the first convex portion is made narrower than that of the first region, a second region where the adhesive is brought into close contact with the first convex portion and the outer panel, a third region where the outer panel is brought into close contact with the adhesive but a space for isolating the organic glass and the adhesive is formed between the organic glass and the adhesive, and a fourth region where the tip of the second convex portion is brought into contact with the outer panel without interposing the adhesive are provided in order.

[0016] In a portion where the organic glass and the outer panel overlap, a fifth region for forming a space where no adhesive exists between the organic glass and the outer panel may be further provided on the central side of the organic glass with respect to the fourth region.

Effect of the Invention

[0017] According to the present invention, it is possible to provide a window structure and a manufacturing method thereof that can suppress the complexity of the manufacturing process and an increase in manufacturing cost, and can suppress the impairment of aesthetics by an adhesive for attaching the organic glass.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0019] Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a part of an automobile 1 which is an example of a vehicle equipped with the window structure according to the present invention. A back door 2 that can be opened and closed is provided at the rear of the automobile 1. The state where the back door 2 is closed is shown by a solid line, and the state where it is open is shown by a two-dot chain line. FIG. 2 is a schematic front view of this back door 2. The back door 2 is provided with a flush window, and the window structure according to the present invention is adopted for this flush window. In this window structure, a transparent or translucent organic glass 3 made of polycarbonate, acrylic resin, or the like is joined to an outer panel 4 which is one of the vehicle body panels.

[0020] FIG. 3(A) is a cross-sectional view showing an enlarged main part of the window structure of the present embodiment, which is an enlarged cross-sectional view of a joint portion 5 where the organic glass 3 and the outer panel 4 overlap, cut along the line A-A in FIG. 2. FIG. 3(B) is an enlarged plan view of the joint portion 5 viewed in the direction of arrow B in FIG. 3(A), and is a view seen from the outside of the vehicle toward the inside of the vehicle. As schematically shown in FIG. 2, the joint portion 5 having the configuration shown in FIG. 3 is provided over the entire circumference of the organic glass 3. A window hole 4a (see FIG. 2) is provided in the outer panel 4, and the organic glass 3 is attached so as to close the window hole 4a to form a window. The outer peripheral portion 3g of the organic glass 3 is joined to the inner peripheral portion 4d of the window hole 4a of the outer panel 4 by an adhesive 6 to form the joint portion 5, and the central side of the organic glass 3 rather than the outer peripheral portion 3g is not adhered to the outer panel 4. The central side referred to here means the central side when viewed in a plan view. In the present embodiment, in the direction from the outer peripheral edge 3h of the organic glass 3 toward the central side (direction C in FIG. 3(A)), the outermost edge convex portion 3a, the first concave portion 3b, the first convex portion 3c, the second concave portion 3d, the second convex portion 3e, and the third concave portion 3f are formed in order. The outer peripheral portion 3g referred to here is a region located on the outer periphery and having a certain range, and the outer peripheral edge 3h is the outermost edge of the outer peripheral portion 3g. Similarly, the inner peripheral portion 4d is a region located on the inner periphery and having a certain range. In the inner peripheral portion 4d of the window hole 4a of the outer panel 4, a first opposing convex portion 4b is formed at a position opposing the first convex portion 3c, and a second opposing convex portion 4c is formed at positions opposing the second convex portion 3e and the third concave portion 3f. A coating layer 7 for blocking ultraviolet rays and enhancing weather resistance is provided on the surface of the organic glass 3. As the adhesive 6, a colored adhesive having high light-shielding properties such as black is used.

[0021] When joining the organic glass 3 to the outer panel 4, the outer peripheral portion 3g of the organic glass 3 and the inner peripheral portion 4d of the window hole 4a of the outer panel 4 are overlapped mainly with a large amount of adhesive 6 applied to the position of the first recess 3b. The adhesive 6 is pressed against the inner peripheral portion 4d of the window hole 4a and protrudes from the first recess 3b, and the protruding adhesive 6 enters the second recess 3d through the narrow space between the first protrusion 3c and the first opposing protrusion 4b. The second recess 3d is not completely filled with the adhesive 6, and there is a space 8 in which only air exists between the bottom surface of the second recess 3d and the surface of the adhesive 6. The second protrusion 3e is in direct contact with the second opposing protrusion 4c. The third recess 3f faces the second opposing protrusion 4c without the intervention of the adhesive 6, and a space 9 in which the adhesive 6 does not exist is formed between the third recess 3f and the second opposing protrusion 4c. As a result, as shown in FIGS. 3(A) and 3(B), from the outermost edge protrusion 3a of the outer peripheral portion 3g of the organic glass 3 toward the center side, there is a first region 5a where the organic glass 3 and the outer panel 4 are adhesively joined without a gap by the adhesive 6, a second region 5b where the adhesive 6 is interposed between the first protrusion 3c and the first opposing protrusion 4b, a third region 5c where the adhesive 6 and the organic glass 3 face each other with a space 8 in which air exists in between, a fourth region 5d where the second protrusion 3e and the second opposing protrusion 4c are in direct contact without the intervention of the adhesive 6, and a fifth region 5e where a space 9 in which the adhesive 6 does not exist is formed between the third recess 3f and the second opposing protrusion 4c are positioned in order. Note that most of the adhesive 6 that tries to protrude from the first recess 3b toward the outer peripheral edge 3h side is blocked by the outermost edge protrusion 3a. Even if there is some adhesive 6 flowing to the outer peripheral edge 3h side through the space between the outermost edge protrusion 3a and the outer panel 4, it is a small amount and thus hardly affects the appearance and does not pose a problem.

[0022] According to this configuration, mainly in the first region 5a, the adhesive 6 closely adheres to the organic glass 3 and the outer panel 4 without any gaps, thereby firmly joining the organic glass 3 and the outer panel 4. In the first region 5a, when viewed from the outside of the organic glass 3, the color of the adhesive 6 (for example, black) can be clearly seen as it is. On the other hand, in the third region 5c, a space 8 intervenes between the organic glass 3 and the adhesive 6, and in this part, the organic glass 3 does not contact the adhesive 6. Since the organic glass 3 does not contact the adhesive 6 and air intervenes, in the third region 5c, when viewed from the outside of the organic glass 3, it appears as a less distinct and blurred color than the first region 5a, that is, a lighter color (for example, gray) than the first region 5a. And the second region 5b is a region for flowing an appropriate amount of the adhesive 6 that has overflowed from the first region 5a into the third region 5c, and the dimension in the direction in which the organic glass 3 and the outer panel 4 overlap due to the first convex portion 3c is narrower than that of the first region 5a. In order for a space 8 to intervene between the organic glass 3 and the adhesive 6 in the third region 5c, it is necessary to make the amount of the adhesive 6 flowing into the third region 5c an appropriate amount. Therefore, by appropriately setting the height of the first convex portion 3c in the second region 5b, an appropriate amount of the adhesive 6 flows from the first region 5a through the second region 5b into the third region 5c. As a result, as described above, in the third region 5c, a space 8 intervenes between the organic glass 3 and the adhesive 6 so that the organic glass 3 does not contact the adhesive 6, and it is realized that it appears as a lighter color than the first region 5a. In this second region 5b, the adhesive 6 closely adheres to the first convex portion 3c and the outer panel 4, and appears at least darker than the third region 5c. In the fourth region 5d, the second convex portion 3e and the second opposing convex portion 4c are in contact with each other to block the flow of the adhesive 6. Therefore, the fourth region 5d and the fifth region 5e on the downstream side (center side) of the portion where the second convex portion 3e and the second opposing convex portion 4c are in contact do not have the adhesive 6, and are the transparent or translucent portions of the organic glass 3 itself that do not exhibit the color of the adhesive 6.Thus, according to this embodiment, at least, a first region 5a where the color of the adhesive 6 is clearly visible (e.g., black), a third region 5c where the color of the adhesive 6 appears light (e.g., gray), and fourth and fifth regions 5d and 5e where the color of the adhesive 6 is invisible (transparent or translucent) are arranged in a direction from the outer peripheral edge 3h of the organic glass 3 toward the center side (direction C in FIG. 3(A)). Here, the light color mainly refers to a color with high brightness.

[0023] Furthermore, the first convex portion 3c and the second convex portion 3e of the organic glass 3 are preferably ridges with curved surfaces at their tips. As an example, they are ridges with a semi-circular, semi-elliptical, or semi-oval cross-sectional shape. When the tip of the first convex portion 3c has a curved surface, the refractive index of light partially decreases. Therefore, when looking at the second region 5b where the first convex portion 3c is provided from the outside, the color of the adhesive 6 appears lighter than that in the first region 5a. However, this second region 5b appears darker than the third region 5c where the space 8 exists and the organic glass 3 does not contact the adhesive 6. In this case, in the direction from the outer peripheral edge 3h of the organic glass 3 toward the center side (direction C in FIG. 3(A)), a first region 5a where the color of the adhesive 6 is clearly visible (e.g., black), a second region 5b where the color of the adhesive 6 appears light (e.g., gray), a third region 5c where the color of the adhesive 6 appears even lighter (e.g., lighter gray), and fourth and fifth regions 5d and 5e where the color of the adhesive 6 is invisible (transparent or translucent) are arranged in order.

[0024] Also, when the tip of the second convex portion 3e has a curved surface, the refractive index of light partially decreases in the same way as the first convex portion 3c. Therefore, in front of (the upstream side of) the portion where the tip of the second convex portion 3e and the outer panel 4 (the second opposing convex portion 4c) come into contact and block the flow of the adhesive 6, the color of the adhesive 6 appears lighter in the curved surface portion of the second convex portion 3e.

[0025] When the third concave portion 3f has a curved surface, the refractive index of light partially decreases in the same way as the first and second convex portions 3c and 3e. Therefore, when the inside of the vehicle seen through the transparent or translucent organic glass appears slightly unclear (blurred), it is effective when it is not preferable for the vehicle interior structure to be visible through the window.

[0026] Thus, according to this embodiment, the color tone (brightness) changes gradually from the region where the color of the adhesive 6 can be clearly seen to the transparent or translucent region where the color of the adhesive 6 cannot be seen in the direction from the outer peripheral edge 3h of the organic glass 3 toward the center side (direction C in FIG. 3(A)). In particular, when the tips of the first convex portion 3c and the second convex portion 3e and the bottom of the third concave portion 3f are each curved, the color tone (brightness) when viewed from the outside changes more finely, so that a smoother color gradation is formed, and the aesthetic appearance can be further enhanced. However, it is also possible to form the tips of the first convex portion 3c and the second convex portion 3e and the bottom of the third concave portion 3f in flat planar shapes, respectively.

[0027] Further, according to the present embodiment, when the tip of the second convex portion 3e of the fourth region 5d abuts against the outer panel 4, the adhesive 6 does not flow toward the central side (downstream side) from the abutting position. That is, since the flow of the adhesive 6 in the direction from the outer peripheral edge 3h of the organic glass 3 toward the central side (direction C in FIG. 3(A)) ends at the position of the tip of the second convex portion 3e, the edge portion of the adhesive 6 spreading between the organic glass 3 and the outer panel 4 becomes linear along the tip of the second convex portion 3e, and the contour of the adhesive 6 has a neat shape. Therefore, the adhesive 6 has a regular shape and does not impair the aesthetic appearance even when viewed from the outside. In this way, in order to ensure that the flow of the adhesive 6 in the direction from the outer peripheral edge 3h of the organic glass 3 toward the central side (direction C in FIG. 3(A)) ends at the position of the tip of the second convex portion 3e, the presence of the space 8 intervening between the organic glass 3 and the adhesive 6 in the third region 5c contributes. If an excessive amount of the adhesive 6 reaches the position of the tip of the second convex portion 3e, there is a risk that the adhesive 6 will push and spread between the tip of the second convex portion 3e and the outer panel 4 and flow further toward the central side (side of the fifth region 5e). However, in the present embodiment, since there is the space 8 that can hold the excessive adhesive 6 in the third region 5c, an excessive amount of the adhesive 6 does not reach the position of the tip of the second convex portion 3e, and the adhesive 6 does not flow toward the central side (downstream side) from that position. Also, the amount of the adhesive 6 held in the third region 5c is adjusted so that the adhesive 6 does not fail to reach the position of the tip of the second convex portion 3e. In this way, an appropriate amount of the adhesive 6 is held in the third region 5c, and the size of the passage through which the adhesive 6 in the second region 5b passes, that is, the height of the first convex portion 3c, is appropriately set so that the space 8 of an appropriate size is provided between the organic glass 3 and the adhesive 6.

[0028] Here, the conventional window structure will be described. As shown in FIG. 5, when attempting to bond the flat organic glass 11 (or glass) to the flat outer panel 12 with an adhesive 13 interposed therebetween while pressing the organic glass 11 against the outer panel 12, the adhesive 13 is pushed and spread. It is difficult to evenly push and spread the adhesive 13 in all directions, and the contour of the pushed and spread adhesive 13 does not become linear but an irregular shape. Therefore, when viewed from the outside of the organic glass 11, irregularly spreading portions of the color of the adhesive 13 (for example, black) are visible, which impairs the aesthetics. Thus, in order to prevent the irregularly spreading adhesive 13 from impairing the aesthetics, a colored layer 14 such as a black ceramic covering the adhesive 13 may be provided. Further, the colored layer 14 is formed entirely in the portion facing the outer peripheral portion of the organic glass 11, but is formed in a plurality of dot shapes on the central side, and the size and density of the dots are changed as going further toward the central side so as to gradually reduce the range occupied by the colored layer 14 so that the colored layer 14 gradually transitions step by step from the colored portion where the colored layer 14 exists to the transparent or translucent portion where the colored layer 14 does not exist. Thereby, a gradation is formed such that the color of the colored layer 14 gradually appears lighter from the portion where the color of the colored layer 14 is clearly visible as it is, further enhancing the aesthetics.

[0029] In contrast, in the present embodiment, an uneven shape is formed on the outer peripheral portion 3g of the organic glass 3 to control the spread of the adhesive 6, thereby eliminating the need for a colored layer such as a black ceramic. Specifically, as described above, a first concave portion 3b (first region 5a) that holds the adhesive 6 and brings the adhesive 6 into close contact with the organic glass 3, and a space 8 that holds the adhesive 6 but isolates the organic glass 3 and the adhesive 6 from each other are interposed between the organic glass 3 and the adhesive 6, so that the adhesive 6 does not contact the organic glass 3 at that portion. A second concave portion 3d (third region 5c) is formed. And a space (second region 5b) serving as a passage through which the adhesive protruding from the first concave portion 3b flows toward the second concave portion 3d is provided between the first concave portion 3b and the second concave portion 3d. As described above, it is necessary to adjust the flow rate of the adhesive from the first concave portion 3b to the second concave portion 3d so that an amount of the adhesive 6 that does not contact the bottom surface of the second concave portion 3d flows into the second concave portion 3d. Therefore, the size of the first convex portion 3c of the organic glass 3 is set so that the space serving as the passage has an appropriate size. And in order to prevent the adhesive from flowing further toward the center side from the second concave portion 3d, a second convex portion 3e is provided on the center side of the second concave portion 3d (fourth region 5d). A portion that blocks the flow of the adhesive 6 is formed by the tip of the second convex portion 3e abutting against the outer panel 4.

[0030] In this configuration, the edges of the first recess 3b and the second recess 3d, and the tips of the first protrusion 3c and the second protrusion 3e (especially the tip of the second protrusion 3e) clearly demarcate the boundaries and contours of the first to fourth regions 5a to 5d. By appropriately setting the internal volumes of the first recess 3b and the second recess 3d and the protrusion heights of the first protrusion 3c and the second protrusion 3e, the flow of the adhesive 6 is controlled. As a result, the adhesive 6 does not spread irregularly and forms a relatively orderly shape, so even if the adhesive 6 is visible from the outside without being hidden by the colored layer, it hardly impairs the aesthetics. Moreover, since the first recess 3b, the first protrusion 3c, the second recess 3d, and the second protrusion 3e are formed in sequence on the organic glass 3, a gradation is formed such that the adhesive 6 gradually appears thinner from its own color (e.g., black) to colorless (transparent or translucent). There is no need to provide a colored layer such as a black ceramic in addition to the adhesive 6, which does not complicate the manufacturing process and can keep the manufacturing cost low. Since the organic glass 3 is a resin molded product, the first recess 3b, the first protrusion 3c, the second recess 3d, the second protrusion 3e, and the third recess 3f can be easily formed with high precision, and the manufacturing process does not become complicated.

[0031] FIG. 4(A) shows an enlarged cross-sectional view of the joint portion 5 between the organic glass 3 and the outer panel 10, which is a main part of the window structure of another embodiment of the present invention, and FIG. 4(B) shows an enlarged plan view of the joint portion 5. In this embodiment, an outer panel 10 whose inner peripheral portion 10a constituting the joint portion 5 is flat and has no first opposing protrusion and second opposing protrusion is used, and accordingly, the protrusion heights of the first protrusion 3c and the second protrusion 3e of the organic glass 3 are formed to be large. In this way, by forming the first protrusion 3c and the second protrusion 3e of the organic glass 3 to be appropriate sizes, even if the inner peripheral portion 10a of the outer panel 10 is flat, the same effects as those of the above-described embodiment can be obtained. In particular, when the outer panel 10 is made of metal, the effect of facilitating manufacturing due to the flat shape of the inner peripheral portion 10a of the outer panel 10 is significant. Regarding other configurations and effects, since they are the same as those of the above-described embodiment, the description is omitted.

[0032] As described above, in the present invention, at least in the direction (C direction) from the outer peripheral edge 3h of the organic glass 3 toward the center side, there are: a first region 5a of the color of the adhesive itself (for example, black) where the adhesive 6 is in close contact with the organic glass 3 and the outer panel 4; a second region 5b that serves as a passage for the adhesive and adjusts the flow of the adhesive 6 from the first region 5a to the third region 5c; a third region 5c that is thinner in color (for example, gray) than the first region 5a and the second region 5b, with a space 8 interposed between the organic glass 3 and the adhesive to isolate the organic glass 3 and the adhesive 6; and a fourth region 5d that is transparent or translucent and does not exhibit the color of the adhesive 6 on the center side (downstream side) of the contact position where the second convex portion 3e of the organic glass 3 contacts the outer panel 4 without the adhesive 6 intervening. By appropriately setting the dimensions of each part including the first convex portion 3c and the second convex portion 3e, the flow of the adhesive 6 can be controlled to form each of the regions 5a to 5d in an orderly shape. Thereby, even if the adhesive 6 is visible through the organic glass 3, the aesthetic appearance is not impaired. Therefore, it is not necessary to provide a colored layer such as a black ceramic, and the complexity of the manufacturing process and the increase in manufacturing cost can be suppressed. Note that, further, a fifth region 5e may be provided on the center side of the fourth region 5d, where a space 9 where no adhesive 6 exists is formed between the organic glass 3 and the outer panel 4. If the bottom of the third concave portion 3f of the organic glass 3 constituting this fifth region 5e is curved, the structure inside the vehicle can be made less visible. Also, between the third region 5c and the fourth region 5d, a region having a convex portion similar to the first convex portion 3c and similar to the second region 5b, and a region similar to the third region 5c with a space 8 interposed between the organic glass 3 and the adhesive 6 to isolate the organic glass 3 and the adhesive 6 may be further provided.

[0033] In one embodiment of the manufacturing method of the window structure of the present invention, a step is included in which an organic glass 3 made of a synthetic resin having translucency (such as polycarbonate or acrylic resin) is attached to an outer panel 4 using an adhesive 6 so as to close a window hole 4a provided in the outer panel 4. The organic glass 3 is provided with a first convex portion 3c and a second convex portion 3e that protrude toward the outer panel 4. In a portion (joint portion 5) where the organic glass 3 and the outer panel 4 overlap, in a direction (C direction) from the outer peripheral edge 3h of the organic glass 3 toward the center side, a first region 5a in which the adhesive 6 is brought into close contact with the organic glass 3 and the outer panel 4, a dimension in the direction in which the organic glass 3 and the outer panel 4 overlap due to the first convex portion 3c is made narrower than that of the first region 5a, a second region 5b in which the adhesive 6 is brought into close contact with the first convex portion 3c and the outer panel 4, a third region 5c in which the outer panel 4 is brought into close contact with the adhesive 6 but a space 8 for isolating the organic glass 3 and the adhesive 6 is formed between the organic glass 3 and the adhesive 6, and a fourth region 5d in which the tip of the second convex portion 3e is brought into contact with the outer panel 4 without interposing the adhesive 6 are provided in order. In a portion (joint portion 5) where the organic glass 3 and the outer panel 4 overlap, a fifth region 5e for forming a space in which the adhesive 6 does not exist between the organic glass 3 and the outer panel 4 may be further provided on the center side of the organic glass 3 than the fourth region 5d.

Explanation of Reference Numerals

[0034] 1 Automobile 2 Back door 3 Organic glass 3a Outermost edge convex portion 3b First recess 3c First convex portion 3d Second recess 3e Second convex portion 3f Third recess 3h Outer peripheral edge 3g Outer peripheral portion 4,10 Outer panel (body panel) 4a Window hole 4b First opposing convex portion 4c Second opposing convex portion 4d,10a Inner peripheral portion 5 Joint portion 5a First region 5b Second region 5c Third region 5d Fourth region 5e Fifth region 6 Adhesive 7 Coating layer 8 Space

Claims

1. An outer panel having a window hole, a synthetic resin-made organic glass having translucency and attached to the outer panel so as to close the window hole, and an adhesive located between the organic glass and the outer panel, wherein the organic glass is provided with a first convex portion and a second convex portion protruding toward the outer panel, in a portion where the organic glass and the outer panel overlap, in a direction from the outer peripheral edge of the organic glass toward the center side, a first region where the adhesive is in close contact with the organic glass and the outer panel, a dimension in a direction in which the organic glass and the outer panel overlap due to the first convex portion is narrower than the first region, a second region where the adhesive is in close contact with the first convex portion and the outer panel, the outer panel is in close contact with the adhesive, and a third region where a space for isolating the organic glass and the adhesive intervenes between the organic glass and the adhesive, and a fourth region where the tip of the second convex portion contacts the outer panel without intervening the adhesive are arranged in order. A window structure characterized by this.

2. In a portion where the organic glass and the outer panel overlap, further having a fifth region where a space where the adhesive does not exist is formed between the organic glass and the outer panel on the center side of the organic glass rather than the fourth region. The window structure according to claim 1.

3. The organic glass is provided with a first concave portion constituting the first region, the first convex portion constituting the second region, a second concave portion constituting the third region, the second convex portion constituting the fourth region, and a third concave portion constituting the fifth region in order in a direction from the outer peripheral edge toward the center side. The window structure according to claim 2.

4. The third concave portion has a curved concave shape. The window structure according to claim 3.

5. The first convex portion and the second convex portion have a semi-circular, semi-elliptical or semi-oval cross-sectional shape. The window structure according to any one of claims 1 to 4.

6. The outer panel is provided with a first opposing convex portion opposing the first convex portion and a second opposing convex portion opposing the second convex portion. The window structure according to any one of claims 1 to 5.

7. The window structure according to any one of claims 1 to 5, wherein the surface of the outer panel facing the organic glass is a flat planar surface.

8. The adhesive is colored, the first region is a region where the color of the adhesive can be seen from the outside of the organic glass, the second region is a region for adjusting the flow of the adhesive from the first region to the third region, the third region is a region where a lighter color than the first region and the second region can be seen from the outside of the organic glass, and the fourth region is a region where the color of the adhesive is not exhibited. The window structure according to any one of claims 1 to 7.

9. The window structure according to any one of claims 1 to 8, which constitutes a fitting window of a back door of an automobile.

10. A method for manufacturing a window structure having an organic glass made of a synthetic resin having translucency, including a step of attaching the organic glass to the outer panel using an adhesive so as to close a window hole provided in the outer panel, wherein the organic glass is provided with a first convex portion and a second convex portion protruding toward the outer panel, In a portion where the organic glass and the outer panel overlap, in a direction from the outer peripheral edge of the organic glass toward the center side, a first region in which the adhesive is brought into close contact with the organic glass and the outer panel, and a dimension in the direction in which the organic glass and the outer panel overlap due to the first convex portion is made narrower than the first region, and a second region in which the adhesive is brought into close contact with the first convex portion and the outer panel, and a third region in which the outer panel is brought into close contact with the adhesive but a space for separating the organic glass and the adhesive is formed between the organic glass and the adhesive, and a fourth region in which the tip of the second convex portion is brought into contact with the outer panel without interposing the adhesive are provided in order. A method for manufacturing a window structure, characterized by this.

11. In a portion where the organic glass and the outer panel overlap, a fifth region for forming a space in which no adhesive exists between the organic glass and the outer panel is further provided on the center side of the organic glass than the fourth region. The method for manufacturing a window structure according to claim 10.

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