panel

Abstract

To provide a panel that is able to prevent peeling of an adhesive injected between the panel and a counterpart panel after the panel is bonded to the counterpart panel.SOLUTION: A panel 1 of the present disclosure includes a first recess 11 on a bonding surface 10 between this panel and a counterpart panel, the first recess having a shape recessed in a direction opposite to the counterpart panel, and the panel is bonded to the counterpart panel via an adhesive injected on the first recess 11. The panel 1 includes a second recess 12 on the bonding surface 10, the second recess having a shape recessed in a direction opposite to the counterpart panel, having a shape communicating with the first recess 11, and serving as a route that allows for flowing of the adhesive injected on the recess 11 according to an increase / decrease in a distance from the counterpart panel after the panel is bonded to the counterpart panel.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] This disclosure relates to panels.

Background Art

[0002] In the technology according to Patent Document 1, a method of joining two panels constituting an automobile using an adhesive is known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the technology according to Patent Document 1, in the manufacturing process of an automobile (for example, handling in a welding process, drying process of painting, etc.), after a panel is adhered to a mating panel, the panel is subjected to an external force or expands due to heat, etc., causing the gap between the panels to narrow, and the adhesive previously filled between the panels is crushed and thinly stretched along the adhesive surface of the panel. Then, when the gap between the panels returns to its original state, there is a problem that the adhesive breaks and the adhesive peels off.

[0005] In view of such problems, an object of this disclosure is to provide a panel that can prevent the peeling of an adhesive filled between the panel and a mating panel after the panel is adhered to the mating panel.

Means for Solving the Problems

[0006] The panel of this disclosure is a panel that is bonded to an opposing panel via an adhesive filling in the first recess, wherein the first recess has a shape that is recessed in the opposite direction to the opposing panel and is in communication with the first recess, and the second recess has a shape that is recessed in the opposite direction to the opposing panel and is in communication with the first recess, and after being bonded to the opposing panel, the adhesive filling in the first recess can flow through it in accordance with the increase or decrease in the distance between the two panels.

[0007] With this configuration, in the panel of the present disclosure, after bonding with the mating panel, a space is secured in which the adhesive can flow, such as the second recess. This makes it less likely for the adhesive to collapse and spread thinly along the bonding surface, and thus the adhesive is less likely to break. Therefore, the panel of the present disclosure can prevent the adhesive from peeling off.

[0008] Furthermore, the panel of this disclosure has a shape that protrudes toward the mating panel, and the adhesive surface is provided with one or more protrusions capable of supporting the mating panel so as to maintain a predetermined distance between them.

[0009] With this configuration, the panel of the present disclosure has a wider space for the adhesive to flow through one or more protrusions after it has been bonded to the mating panel. Therefore, the panel of the present disclosure is better able to prevent the adhesive from peeling off.

[0010] Furthermore, the panel of this disclosure has the protrusions on the adhesive surface without being connected to either the first recess or the second recess.

[0011] With this configuration, the panel of the present disclosure has protrusions located outside the first recess and outside the second recess, thereby reducing the possibility of the protrusions trapping the adhesive.

[0012] Furthermore, in the panel of this disclosure, the maximum depth of the first recess from the adhesive surface is greater than the maximum depth of the second recess from the adhesive surface.

[0013] With this configuration, the panel of the present disclosure allows the adhesive to flow more easily into the second recess after it has been bonded to the mating panel.

[0014] Furthermore, the panel of this disclosure is used in the hood of a vehicle. [Effects of the Invention]

[0015] This disclosure makes it possible to provide a panel that can prevent the adhesive filling between the panel and the mating panel from peeling off after the panel has been bonded to the mating panel. [Brief explanation of the drawing]

[0016] [Figure 1] This figure shows an example of the panel configuration according to a comparative example of this embodiment. [Figure 2] This figure shows an example of the panel configuration according to the first embodiment. [Figure 3] This figure shows an example of the panel configuration according to the second embodiment. [Modes for carrying out the invention]

[0017] (Specific description of the problems that this embodiment aims to solve) First, the problems that this embodiment aims to solve will be specifically explained using Figure 1. Figure 1 is a diagram showing an example of the configuration of panel C1 in a comparative example of this embodiment. Figure 1(A) is a plan view showing an example of the configuration of panel C1 according to a comparative example of this embodiment. As shown in Figure 1(A), panel C1 is a sheet metal part, such as the inner panel of a vehicle's hood. Panel C1 is bonded to a mating panel by adhesive. The mating panel is a sheet metal part, such as the outer panel of a vehicle's hood. The adhesive is a material such as mastic sealant.

[0018] Panel C1 has a first recess C11 on an adhesive surface C10, which is one side that adheres to the mating panel. The first recess C11 has a shape that is recessed in the direction opposite to the mating panel. Panel C1 is adhered to the mating panel through an adhesive filled in the first recess C11. At this time, Panel C1 and the mating panel are adhered so that the distance (gap) between the two is the reference distance.

[0019] FIG. 1(B) is a diagram showing an example of a change in the adhesion state when the A-A cross-section of FIG. 1(A) is viewed from one side after Panel C1 according to the comparative example of the present embodiment is adhered to the mating panel. In FIG. 1(B), the mating panel is indicated by reference numeral C200, the adhesive is indicated by reference numeral C300, and the reference distance is indicated by reference numeral L1. As shown in FIG. 1(B), after Panel C1 is adhered to the mating panel C200 with the adhesive C300, (I) when the gap between Panel C1 and the mating panel C200 is clogged more than the reference distance L1 due to an external force, thermal expansion, etc., the adhesive C300 is crushed, and the crushed adhesive C300 is thinly extended along the adhesive surface C10. Then, (II) when the gap between Panel C1 and the mating panel 200 returns to the reference distance L1, the adhesive C300 is cut because it has been thinly extended along the adhesive surface C10. Therefore, the adhesive C300 peels off.

[0020] In the following First and Second Embodiments, an object is to provide a panel that can prevent the adhesive filled between the panel and the mating panel from peeling off after being adhered to the mating panel.

[0021] (First Embodiment) Subsequently, the configuration of Panel 1 according to the first embodiment will be described using FIG. 2. FIG. 2 is a diagram showing an example of the configuration of Panel 1 according to the first embodiment.

[0022] FIG. 2(A) is a plan view showing an example of the configuration of Panel 1 according to the first embodiment. As shown in Figure 2(A), panel 1 is a sheet metal part, such as the inner panel of a vehicle's hood. Panel 1 is bonded to a mating panel by adhesive. The mating panel is a sheet metal part, such as the outer panel of a vehicle's hood. The adhesive is a material such as mastic sealant.

[0023] Panel 1 has a first recess 11 on the adhesive surface 10, which is the side that adheres to the mating panel. The first recess 11 has a shape that is recessed in the direction opposite to that of the mating panel. Panel 1 is bonded to the mating panel via adhesive filled in the first recess 11. At this time, Panel 1 and the mating panel are bonded so that the distance (gap) between them is a reference distance.

[0024] Furthermore, panel 1 has one or more second recesses 12 (e.g., second recesses 12a and second recesses 12b) on the bonding surface 10. The second recesses 12 have a shape that is recessed in the opposite direction from the mating panel and communicates with the first recesses 11. Here, the second recesses 12 serve as a path for the adhesive filled in the first recesses 11 to flow in accordance with the increase or decrease in the distance between panel 1 and the mating panel after panel 1 has been bonded to the mating panel. Note that the second recesses 12 are not limited to the shape described above, and may, for example, have a shape that surrounds the first recesses 11.

[0025] Preferably, the maximum depth of the first recess 11 from the adhesive surface 10 is greater than the maximum depth of the second recess 12 from the adhesive surface 10. By doing so, the adhesive filled in the first recess 11 flows more easily in response to increases or decreases in the gap between panel 1 and the mating panel after panel 1 has been bonded to it.

[0026] Figure 2(B) shows an example of the change in the bonding state when viewing the AA cross-section of Figure 2(A) from one side after panel 1 according to the first embodiment has been bonded to the mating panel. In Figure 2(B), the mating panel is indicated by reference numeral 200, the adhesive by reference numeral 300, and the reference distance by reference numeral L2.

[0027] As shown in Figure 2(B), after panel 1 is bonded to the mating panel 200, (I) if the gap between panel 1 and the mating panel 200 becomes smaller than the reference distance L2 due to external force, thermal expansion, etc., the adhesive 300 filled in the first recess 11 flows into the second recess 12. Subsequently, (II) if the gap between panel 1 and the mating panel 200 returns to the reference distance L2, the adhesive 300 that flowed into the second recess 12 returns to the first recess 11.

[0028] In panel 1, the first recess 11, which is deeper than the second recess 12, prevents the adhesive from slipping. Furthermore, even when the bonding state changes as in (I) to (II), a space is secured in the second recess 12 that allows the adhesive 300 to flow, making it less likely for the adhesive 300 to collapse and spread thinly along the bonding surface 10, as in the comparative example described above. Therefore, in panel 1, the peeling of the adhesive 300 due to the adhesive 300 breaking can be prevented.

[0029] (Second embodiment) Next, the configuration of panel 2 according to the second embodiment will be described using Figure 3. Figure 3 is a diagram showing an example of the configuration of panel 2 according to the second embodiment.

[0030] Figure 3(A) is a plan view showing an example of the configuration of panel 2 according to the second embodiment. As shown in Figure 3(A), panel 2 further comprises the following configuration in addition to the configuration of panel 1 according to the first embodiment.

[0031] Panel 2 further comprises one or more protrusions 21 (e.g., protrusions 21a and 21b) on the adhesive surface 10. The protrusions 21 have a shape that projects toward the mating panel. The protrusions 21 are members capable of supporting the mating panel so as to maintain a predetermined distance between them.

[0032] It is preferable that multiple protrusions 21 are installed so as to sandwich the first recess 11. This ensures stable support for the opposing panel. Furthermore, it is preferable that the protrusions 21 be positioned on the panel 1 outside the first recess 11 and outside the second recess 12. This is because if the protrusions 21 are positioned inside the first recess 11 and outside the second recess 12, there is a risk that the adhesive 300 may cover the apex of the protrusions 21 when the adhesive 300 flows, but this problem can be avoided if the protrusions 21 are positioned outside the first recess 11 and outside the second recess 12.

[0033] Figure 3(B) shows an example of the change in the bonding state when the AA cross section of Figure 3(A) is viewed from one side after the panel 2 according to the second embodiment has been bonded to the mating panel. As shown in Figure 3(B), after panel 2 is bonded to the mating panel 200, (I) if the gap between panel 2 and the mating panel 200 becomes smaller than the reference distance L2 due to external force, thermal expansion, etc., the adhesive 300 filled in the first recess 11 flows into the second recess 12. However, the gap between panel 2 and the mating panel 200 will only be filled to a predetermined distance L3, which is the height of the protrusion 21 from the bonding surface 10. Subsequently, (II) if the gap between panel 2 and the mating panel 200 returns to the reference distance L2, the adhesive 300 that flowed into the second recess 12 returns to the first recess 11.

[0034] In panel 2, the first recess 11, which is deeper than the second recess 12, prevents the adhesive from slipping. Furthermore, even when the bonding state changes as in (I) to (II), a space for the adhesive 300 to flow, such as the second recess 12, is secured, making it less likely for the adhesive 300 to collapse and spread thinly along the bonding surface 10, as in the comparative example described above. In addition, the protrusion 21 secures an even wider space for the adhesive 300 to flow. In this way, panel 2 can better prevent the adhesive 300 from peeling off due to the adhesive 300 breaking.

[0035] This disclosure is not limited to the embodiments described above, and may be modified as appropriate without departing from its intent. For example, the embodiments described above are not limited to the above, and panel C1, panel 1, panel 2, and mating panel 200 may be made of resin. [Explanation of symbols]

[0036] C1,1,2 Panel, C10,10 Adhesive surface, C11,11 First recess, 12,12a,12b Second recess, 21,21a,21b Protrusion, C200,200 Opposing panel, C300,300 Adhesive

Claims

1. A panel having a first recess on its bonding surface with the mating panel, which is recessed in the opposite direction to the mating panel, and which is bonded to the mating panel via an adhesive filled in the first recess, The bonding surface is provided with a second recess having a shape that is recessed in the opposite direction from the mating panel and communicates with the first recess, and which serves as a path through which the adhesive filled in the first recess can flow in accordance with the increase or decrease in the distance between the mating panel and the bonding surface after bonding to the mating panel. The adhesive surface is provided with one or more protrusions having a shape that protrudes toward the mating panel, and capable of supporting the mating panel so as to maintain a predetermined distance between them, The protrusion is provided on the adhesive surface without being connected to either the first recess or the second recess. panel.

2. The maximum depth of the first recess from the adhesive surface is greater than the maximum depth of the second recess from the adhesive surface. The panel according to claim 1.

3. Used in the hood of a vehicle The panel according to claim 1.

Images