JP2020152283A - Opening/closing panel for vehicle - Google Patents

Abstract

To provide an opening/closing panel for a vehicle which can suppress heat strain generated in a resin panel without improving rigidity of the resin panel even when a frame member having a small coefficient of heat expansion is bonded to a resin panel having a large coefficient of heat expansion.SOLUTION: In an opening/closing panel for a vehicle that includes a resin panel 11 and a frame member 12 which is formed of a carbon fiber-reinforced resin having a smaller coefficient of heat expansion than that of the resin panel 11 and is bonded to inside the resin panel 11, an adhesive part 36 that bonds the resin panel 11 and the frame member 12 is provided, and in the adhesive part 36, a direction of a load acting on the adhesive part 36 along with heat expansion of the resin panel 11 is set at a position oriented to a shear center S of the frame member 12.SELECTED DRAWING: Figure 3

Description

The present invention relates to an opening / closing panel for a vehicle, for example, a panel that can be opened / closed in a vehicle such as a door panel or a window panel.

As a conventional technique for an opening / closing panel for a vehicle, for example, in Patent Document 1, even if members having different coefficients of thermal expansion are bonded to each other, a member for a vehicle capable of suppressing thermal strain generated on the member side having a large coefficient of thermal expansion can be suppressed. The adhesive structure of the back door and the adhesive structure of the back door are disclosed.

The adhesive structure of the vehicle member of Patent Document 1 is a panel-like structure made of resin, and a first member having a ridge line formed by uneven portions divided by the curvature of other portions on the surface, and a first member. It has a panel-shaped second member made of a resin having a coefficient of thermal expansion smaller than that of one member. Further, the adhesive structure of the vehicle member is provided on the outer edge side of the first member, and is provided inside the outer adhesive portion for adhering the first member and the second member and the outer adhesive portion in the surface direction of the first member. It has an inner adhesive portion for adhering the first member and the second member. In the inner bonding portion, at least one of the plurality of tops adjacent to the outer bonding portion overlaps with the ridgeline when viewed from the outside of the vehicle.

According to the adhesive structure of the vehicle member of Patent Document 1, the rigidity of the first member can be improved by forming a ridge line by the uneven portion on the first member. As a result, even if members having different coefficients of thermal expansion are adhered to each other, thermal strain generated on the member side having a large coefficient of thermal expansion can be suppressed.

Japanese Unexamined Patent Publication No. 2015-116930

However, in the adhesive structure of the vehicle member of Patent Document 1, the rigidity of the first member is improved by forming a ridge line due to the uneven portion on the first member, and even if members having different coefficients of thermal expansion are bonded to each other. It is just a technical idea to suppress the thermal strain that occurs on the member side with a large coefficient of thermal expansion. In a vehicle opening / closing panel provided with a resin panel and a frame member bonded to the inside of the resin panel, measures other than improving the rigidity of the resin panel are taken in order to suppress thermal distortion that occurs in the resin panel having a large coefficient of thermal expansion. It is also desired to use.

The present invention has been made in view of the above problems, and an object of the present invention is to improve the rigidity of the resin panel even if a frame member having a small coefficient of thermal expansion is bonded to a resin panel having a large coefficient of thermal expansion. The present invention is to provide an opening / closing panel for a vehicle that can suppress thermal strain generated in a resin panel.

In order to solve the above problems, the present invention is formed of a resin panel formed of a resin material and a carbon fiber reinforced resin having a thermal expansion coefficient smaller than that of the resin panel, and is adhered to the inside of the resin panel. In the vehicle opening / closing panel including the frame member, an adhesive portion for adhering the resin panel and the frame member is provided, and the adhesive portion acts on the adhesive portion as the resin panel heats and contracts. It is characterized in that the direction of the load to be applied is set to a position in which the shear center of the frame member is directed.

In the present invention, when thermal expansion and contraction occurs in the resin panel, the frame member receives the load generated by thermal expansion and contraction through the adhesive portion. Since the direction of the load acting on the adhesive portion due to the thermal expansion and contraction of the resin panel is set at a position in which the direction of the load acting on the adhesive portion is directed to the shear center of the frame member, the moment around the shear center generated in the frame member is suppressed. To. Therefore, it is possible to suppress the thermal strain of the resin panel without improving the rigidity of the resin panel.

Further, in the above-mentioned opening / closing panel for a vehicle, the frame member includes a frame main body portion having a U-shaped cross section defining the shear center and a frame extending portion extending from the frame main body portion to the shear center side. The resin panel comprises a panel main body portion facing the opening side of the U-shaped cross section of the frame main body portion, and a panel extending from the panel main body portion and facing the frame extending portion. An extending portion may be provided, and the bonding portion may be provided at a position where the frame extending portion and the panel extending portion are bonded to each other.
In this case, the frame main body of the frame member has a U-shaped cross section, and the panel main body faces the opening side of the U-shaped cross section of the frame main body, so that the shear center is defined with respect to the frame main body. Will be done. When thermal expansion and contraction occurs in the resin panel, the frame body receives a load generated by thermal expansion and contraction through the adhesive portion. Since the adhesive portion that adheres the frame extension portion and the panel extension portion is located near the shear center that faces the shear center, the shear center that occurs in the frame body even if the frame member receives a load due to thermal expansion and contraction The surrounding moment is suppressed.

Further, in the above-mentioned vehicle opening / closing panel, when the adhesive portion is projected in a direction parallel to the direction of the load generated on the frame member due to thermal expansion and contraction of the resin panel, the shear center is included in the projection surface of the adhesive portion. It may be configured to be

In this case, since the shear center is included in the projection surface of the bonded portion, the moment around the shear center generated in the frame member is further suppressed.

Further, the present invention includes a resin panel formed of a resin material and a frame member formed of a carbon fiber reinforced resin having a thermal expansion coefficient smaller than that of the resin panel and bonded to the inside of the resin panel. In the opening / closing panel for use, the frame member has a U-shaped cross section that defines the shear center, and is between the shear center and the frame member in a direction intersecting the direction of the load generated on the resin panel by heat shrinkage. Is provided with an adhesive portion for adhering the resin panel and the frame member.

In the present invention, since the frame member has a U-shaped cross section, a shear center is defined with respect to the frame member. When thermal expansion and contraction occurs on the resin panel, a load is generated on the resin panel due to thermal expansion and contraction. Even if a load due to thermal expansion and contraction is generated, the adhesive portion that adheres the frame member and the resin panel is located between the shear center and the frame member, and is therefore located near the shear center. Therefore, the moment around the shear center generated in the frame member is suppressed without adding a member or the like to the resin panel and the frame member. Therefore, the thermal strain of the resin panel can be suppressed without improving the rigidity of the resin panel and the frame member.

According to the present invention, even if a frame member having a small coefficient of thermal expansion is adhered to a resin panel having a large coefficient of thermal expansion, an opening / closing panel for a vehicle capable of suppressing thermal strain generated in the resin panel without improving the rigidity of the resin panel. Can be provided.

It is an exploded perspective view of the opening / closing panel for a vehicle which concerns on 1st Embodiment of this invention. It is a front view of the main part of the opening / closing panel for a vehicle which concerns on 1st Embodiment of this invention. It is an arrow view of the line AA of FIG. It is an exploded perspective view of the opening / closing panel for a vehicle which concerns on 2nd Embodiment of this invention. It is a front view of the main part of the opening / closing panel for a vehicle which concerns on 1st Embodiment of this invention. It is an arrow view of the line BB of FIG.

(First Embodiment)
Hereinafter, the vehicle opening / closing panel according to the first embodiment will be described with reference to the drawings. The vehicle opening / closing panel of the present embodiment is a back door panel provided at the rear of the vehicle body of the automobile. The "front and back", "left and right", and "up and down" that specify the direction are shown based on the state in which the driver sits on the driver's seat in the driver's seat of the vehicle and faces the forward side of the vehicle.

As shown in FIG. 1, the back door panel 10 as an opening / closing panel for a vehicle is a door panel that opens / closes an opening (not shown) formed at the rear portion of a vehicle body (not shown). The back door panel 10 includes a resin panel 11 formed of a resin material and a frame member 12 bonded to the inside of the resin panel 11.

The resin panel 11 includes a first resin molded body 13 having transparency and a second resin molded body 14 having opacity or translucency laminated on the first resin molded body 13. The first resin molded body 13 is made of a transparent resin, and the second resin molded body 14 is made of an opaque or translucent resin. The first resin molded body 13 and the second resin molded body 14 are integrally formed by two-color resin molding by injection molding. The first resin molded body 13 and the second resin molded body 14 are made of polycarbonate.

The first resin molded body 13 has a substantially rectangular shape corresponding to the opening provided in the vehicle body. The surface of the first resin molded body 13 constitutes the surface of the resin panel 11 (the surface on the outside of the vehicle). A part of the back surface of the first resin molded body 13 on which the second resin molded body 14 is not laminated constitutes a part of the back surface (the surface on the vehicle interior side) of the resin panel 11. The outer peripheral edge of the first resin molded body 13 is mainly formed by an upper edge 15, a lower edge 16, a right edge 17, and a left edge 18. The upper edge 15 and the right edge 17 (or the left edge 18) are formed by an arc-shaped arc edge 19, and the lower edge 16 and the right edge 17 (or the left edge 18) are formed by an arc-shaped arc edge 19. It is formed by the arc edge 20. The upper edge 15 and the lower edge 16 are longer than the right edge 17 and the left edge 18.

The second resin molded body 14 is formed in a band shape along the outer peripheral edge on the back surface of the first resin molded body 13. The frame member 12 is adhered to the second resin molded body 14. The second resin molded body 14 has a portion covered by the adhesion of the frame member 12 and a portion not covered by the frame member 12. In FIG. 1, in the second resin molded body 14, the portion inside the alternate long and short dash line L is covered by the frame member 12, and in the second resin molded body 14, the portion outside the alternate long and short dash line L is not covered by the frame member 12. .. The portion of the second resin molded body 14 that is not covered by the frame member 12 constitutes a part of the back surface of the resin panel 11.

The resin panel 11 includes a panel-shaped panel main body 21 formed by the second resin molded body 14 in the first resin molded body 13, and a panel extending extending from the panel main body 21 toward the frame member 12. It is equipped with a part 22 and. The panel body 21 occupies most of the resin panel 11.

The panel extending portion 22 extends from the right edge 17 and the left edge 18 of the panel main body 21 toward a direction substantially orthogonal to the panel surface of the panel main body 21. The panel extending portion 22 is a portion provided for adhesion to the frame member 12, and faces the frame member 12. The panel extending portion 22 is formed over the right edge 17 and the left edge 18. The panel extending portion 22 is formed by the first resin molded body 13 and the second resin molded body 14.

Next, the frame member 12 will be described. The frame member 12 is made of a carbon fiber reinforced resin having a coefficient of thermal expansion smaller than that of the resin panel 11. Therefore, the coefficient of linear expansion of the resin panel 11 is larger than the coefficient of linear expansion of the frame member 12. The frame member 12 includes a frame body portion 23 having a substantially rectangular frame shape corresponding to the shape of the resin panel 11. The frame main body portion 23 has an upper side portion 24, a lower side portion 25, a right side portion 26, and a left side portion 27.

As shown in FIG. 2, an arcuate side portion 28 formed in an arc shape is formed between the upper side portion 24 and the right side portion 26 (or the left side portion 27). An arcuate side portion 29 formed in an arc shape is formed between the lower side portion 25 and the right side portion 26 (or the left side portion 27). The upper side portion 24 and the lower side portion 25 are longer than the right side portion 26 and the left side portion 27.

A pair of left and right hinge portions 30 for connecting the back door panel 10 to the vehicle body are provided on the back surface (inner side surface) of the upper side portion 24. The hinge portion 30 is formed in a substantially C shape, and the tip of the hinge portion 30 is supported by a shaft portion (not shown) provided on the vehicle body. The back door panel 10 is supported by the vehicle body via a pair of left and right hinge portions 30, and can be opened and closed with respect to the opening of the vehicle body.

A lock striker 31 is provided on the lower side portion 25. The lock striker 31 is fixed by a door notch (not shown) provided on the vehicle body. By fixing the lock striker 31 to the door notch provided in the vehicle body, the back door panel 10 is fixed to the vehicle body in a state where the opening of the vehicle body is closed. When the door notch releases the lock striker 31, the back door panel 10 can open the opening of the vehicle body.

The upper side portion 24, the lower side portion 25, the right side portion 26, the left side portion 27, and the arc side portions 28, 29 of the frame member 12 have a U-shaped cross section. As shown in FIG. 3, for example, the right side portion 26 includes a back plate portion 32, a side plate portion 33 formed at the right end (outer end) of the back plate portion 32 in the width direction, and a back plate portion 32 in the width direction. A side plate portion 34 formed at the left end (inner end) is provided.

The surface of the back plate portion 32 faces the back surface of the resin panel 11. The side plate portions 33 and 34 extend from the back plate portion 32 toward the panel main body portion 21. Therefore, the back plate portion 32 and the side plate portions 33, 34 form a U-shaped cross section of the right side portion 26, and the opening side of the U-shaped cross section faces the back surface of the resin panel 11. Although not shown, the upper side portion 24, the lower side portion 25, the left side portion 27, and the arc side portions 28, 29 are the back plate portion and the side plate portion corresponding to the back plate portion 32 and the side plate portions 33, 34 of the right side portion 26. Has.

The side plate portion 33 faces the panel extending portion 22. The right side portion 26 includes a plate portion 35 extending from the side plate portion 33 side of the back plate portion 32 in a direction opposite to the extending direction of the side plate portion 33. The plate portion 35 corresponds to a frame extending portion and is integrally formed with the frame main body portion 23. Further, the plate portion 35 has a surface that is flush with the surface of the side plate portion 33 that faces the panel extending portion 22. An adhesive portion 36 having an adhesive interposed between the plate portion 35 and the panel extending portion 22 is formed. The adhesive portion 36 adheres the plate portion 35 and the panel extending portion 22. The adhesive in the present embodiment is a thermosetting urethane-based adhesive, but an adhesive other than the urethane-based adhesive may be used. The left side portion 27 also has an adhesive portion 36 (not shown) for adhering the panel extending portion 22 and the plate portion 35.

In the back door panel 10 of the present embodiment, in addition to the adhesive portion 36, an adhesive portion (not shown) for adhering the resin panel 11 and the frame member 12 is formed between the resin panel 11 and the upper side portion 24 and the lower side portion 25. It is formed. The resin panel 11 and the frame member 12 are mutually fixed by the adhesion between the plate portion 35 and the panel extending portion 22 by each of the adhesive portions including the adhesive portion 36.

By the way, since the back plate portion 32 and the side plate portions 33, 34 form a U-shaped cross section of the right side portion 26, there is a shear center S defined by the U-shaped cross section (see FIG. 3). The shear center S exists at a position away from the surface of the back plate portion 32 opposite to the surface facing the panel main body portion 21. The adhesive portion 36 formed on the plate portion 35 is located near the shear center S in the front-rear direction. The plate portion 35 as the frame extending portion on which the adhesive portion 36 is formed extends from the frame main body portion 23 to the shear center S in the front-rear direction.

Since the upper edge 15 and the lower edge 16 of the resin panel 11 of the present embodiment are longer than the right edge 17 and the left edge 18, when the resin panel 11 is thermally shrunk, the amount of shrinkage of the resin panel 11 in the left-right direction becomes the largest. Since the frame member 12 is adhered to the resin panel 11, a load in the left-right direction that brings the right side portion 26 and the left side portion 27 closer to each other is generated on the frame member 12 due to the heat shrinkage of the resin panel 11 in the left-right direction. .. In FIG. 3, the direction of the load generated during heat shrinkage is indicated by a white arrow.

In the present embodiment, when the adhesive surface of the adhesive portion 36 with the plate portion 35 is projected in a direction parallel to the direction of the load generated on the resin panel 11 due to heat shrinkage, the shear center S is included in the projection surface of the adhesive portion 36. .. FIG. 3 shows the length E of the bonded portion 36 in the front-rear direction, and the shear center S is included in the range of the length E in the front-rear direction. The fact that the shear center S is included in the range of the length E indicates that the shear center S is included in the projection plane of the bonding portion 36. By including the shear center S in the projection surface of the adhesive portion 36, even if a load in the left-right direction due to heat shrinkage of the resin panel 11 acts on the frame member 12, the moment around the shear center S generated in the frame member 12 is suppressed. ..

Although not shown, the left side portion 27 is provided with a plate portion 35 similar to the right side portion 26, and the plate portion 35 and the adhesive portion 36 bonded to the panel extending portion 22 on the left side portion 27 side are provided. It is formed. The adhesive portion 36 of the plate portion 35 of the left side portion 27 adheres the plate portion 35 and the left panel extending portion 22 of the resin panel 11. Although not shown, the shear center S defined by the U-shaped cross section of the left side portion 27 is included in the projection surface of the adhesive portion 36.

Next, the operation of the back door panel 10 of the present embodiment will be described. For example, at a low temperature of about −30 ° C. below freezing point, the back door panel 10 heat-shrinks more than at room temperature. Due to the difference in linear expansion coefficient between the resin panel 11 and the frame member 12 in the back door panel 10, the heat shrinkage of the resin panel 11 in the left-right direction is larger than the heat shrinkage of the frame member 12. Therefore, a load is generated on the frame member 12 in the direction of attracting the right side portion 26 and the left side portion 27 to each other.

When the adhesive surface of the adhesive portion 36 is projected in a direction parallel to the direction of the load generated on the resin panel 11 by heat shrinkage, the shear center S is included in the projected surface of the adhesive portion 36. Therefore, even if the frame member 12 receives a load through the adhesive portion 36, the moment of the shear center S generated in the frame member 12 is suppressed. Therefore, the deformation of the resin panel 11 due to the moment caused by the heat shrinkage generated in the resin panel 11 is suppressed. That is, even if the frame member 12 having a small coefficient of thermal expansion is adhered to the resin panel 11 having a large coefficient of thermal expansion, the thermal strain generated in the resin panel 11 is suppressed without improving the rigidity of the resin panel 11.

In the case of high temperature, the back door panel 10 thermally expands from the state of normal temperature, and a load is generated on the frame member 12 in the direction of separating the right side portion 26 and the left side portion 27 from each other. Since the shear center S is included in the projection surface of the adhesive portion 36, even if the frame member 12 receives a load through the adhesive portion 36, the moment of the shear center S generated in the frame member 12 is suppressed. Therefore, the deformation due to the moment caused by the thermal expansion generated in the resin panel 11 is suppressed.

The back door panel 10 of the present embodiment has the following effects.
(1) When thermal expansion and contraction occurs in the resin panel 11, the frame member 12 receives a load generated by thermal expansion and contraction through the adhesive portion 36. Since the direction of the load acting on the adhesive portion 36 due to the thermal expansion and contraction of the resin panel 11 is set at the position where the adhesive portion 36 points to the shear center S of the frame member 12, the shear center S generated in the frame member 12 The surrounding moment is suppressed. Therefore, the thermal strain of the resin panel 11 can be suppressed without improving the rigidity of the resin panel 11.

(2) The frame main body 23 of the frame member 12 has a U-shaped cross section, and the panel main body 21 faces the opening side of the U-shaped cross section of the frame main body 23. The shear center S is defined. When thermal expansion and contraction occurs in the resin panel 11, the frame main body 23 receives a load generated by thermal expansion and contraction through the adhesive portion 36. Since the adhesive portion 36 that adheres the plate portion 35 as the frame extending portion and the panel extending portion 22 is located near the shear center S that points to the shear center S, the frame member 12 receives a load due to heat shrinkage. However, the moment generated in the frame main body 23 is suppressed.

(3) When the adhesive portion 36 is projected in a direction parallel to the direction of the load generated on the resin panel 11, the shear center S is included in the projection surface of the adhesive portion 36. Therefore, the moment of the shear center S generated in the frame member 12 is further suppressed.

(4) The frame member 12 has a plate portion 35 as a frame extending portion with respect to the frame main body portion 23. Therefore, the rigidity of the frame member 12 is improved as compared with the case where the frame member 12 includes only the frame main body portion 23. Therefore, the frame member 12 can withstand the load generated by the heat shrinkage of the resin panel 11 not only by suppressing the moment of the shear center S but also by the rigidity of the frame member 12.

(5) The direction of the load due to heat shrinkage of the resin panel 11 received by the frame member 12 through the adhesive portion 36 is the direction in which the adhesive portion 36 and the adhesive surface intersect. Therefore, there is almost no load component acting in the direction parallel to the adhesive surface of the adhesive portion 36, and excessive deformation of the adhesive portion 36 due to the load acting in the direction parallel to the adhesive surface of the adhesive portion 36 does not occur.

(Second Embodiment)
Next, the vehicle opening / closing panel according to the second embodiment will be described. The vehicle opening / closing panel of the present embodiment is a back door panel provided at the rear portion of the vehicle body of the automobile as in the first embodiment. In the present embodiment, the description of the first embodiment is incorporated for the same configuration as that of the first embodiment, and a common reference numeral is used.

As shown in FIG. 4, the back door panel 40 as an opening / closing panel for a vehicle is a door panel that opens / closes an opening (not shown) formed at the rear portion of a vehicle body (not shown). The back door panel 10 includes a resin panel 41 formed of a resin material and a frame member 42 adhered to the inside of the resin panel 41.

The resin panel 41 includes a transparent first resin molded body 13 and an opaque or translucent second resin molded body 14 laminated on the first resin molded body 13. The surface of the first resin molded body 13 constitutes the surface of the resin panel 41 (the surface on the outside of the vehicle). A part of the back surface of the first resin molded body 13 on which the second resin molded body 14 is not laminated constitutes a part of the back surface (the surface on the vehicle interior side) of the resin panel 41.

The frame member 42 is adhered to the second resin molded body 14. The second resin molded body 14 has a portion covered by the adhesion of the frame member 12 and a portion not covered by the frame member 42. In FIG. 4, in the second resin molded body 14, the portion inside the alternate long and short dash line L is covered by the frame member 42, and in the second resin molded body 14, the portion outside the alternate long and short dash line L is not covered by the frame member 42. .. The portion of the second resin molded body 14 that is not covered by the frame member 42 constitutes a part of the back surface of the resin panel 41.

Next, the frame member 42 will be described. The frame member 42 is made of a carbon fiber reinforced resin having a coefficient of thermal expansion smaller than that of the resin panel 41. Therefore, the coefficient of linear expansion of the resin panel 41 is larger than the coefficient of linear expansion of the frame member 42. The frame member 42 is formed in a substantially rectangular frame shape corresponding to the shape of the resin panel 41. The frame member 42 has an upper side portion 43, a lower side portion 44, a right side portion 45, and a left side portion 46. As shown in FIG. 5, an arcuate side portion 47 formed in an arc shape is formed between the upper side portion 43 and the right side portion 45 (or the left side portion 46). An arcuate side portion 48 formed in an arc shape is formed between the lower side portion 44 and the right side portion 45 (or the left side portion 46). The upper side portion 43 and the lower side portion 44 are longer than the right side portion 45 and the left side portion 46.

A pair of left and right hinge portions 30 for connecting the back door panel 10 to the vehicle body are provided on the back surface (inner side surface) of the upper side portion 43. A lock striker 31 is provided on the lower side portion 44.

The upper side portion 43, the lower side portion 44, the right side portion 45, the left side portion 46, and the arc side portions 47, 48 of the frame member 42 have a U-shaped cross section. As shown in FIG. 6, for example, the right side portion 45 is the back plate portion 49, the side plate portion 50 formed at the right end (outer end) of the back plate portion 49 in the width direction, and the back plate portion 49 in the width direction. It includes a side plate portion 51 formed at the left end (inner end).

The surface of the back plate portion 49 approaches and faces the back surface of the resin panel 41. The side plate portions 50 and 51 extend from the back plate portion 49 in a direction away from the resin panel 41. Therefore, the back plate portion 49 and the side plate portions 50, 51 form a U-shaped cross section of the right side portion 45, and the opening side of the U-shaped cross section faces the opposite direction to the resin panel 41. Although not shown, the upper side portion 43, the lower side portion 44, the left side portion 46, and the arc side portions 47, 48 are the back plate portion and the side plate portion corresponding to the back plate portion 49 and the side plate portions 50, 51 of the right side portion 45. Has.

An adhesive portion 52 is formed between the back surface of the resin panel 41 and the back plate portion 49 with an adhesive interposed therebetween. The adhesive portion 52 adheres the resin panel 41 and the frame member 42. The adhesive is a thermosetting urethane-based adhesive, but an adhesive other than the urethane-based adhesive may be used. In the back door panel 10 of the present embodiment, in addition to the adhesive portion 52, an adhesive portion (not shown) for adhering the resin panel 41 and the frame member 42 is formed between the resin panel 41 and the upper side portion 43 and the lower side portion 44. It is formed. The resin panel 41 and the frame member 42 are fixed to each other by adhering the resin panel 41 and the frame member 42 by each of the adhesive portions including the adhesive portion 52.

By the way, since the back plate portion 49 and the side plate portions 50 and 51 form a U-shaped cross section of the right side portion 45, there is a shear center S defined by the U-shaped cross section. The shear center S exists at a position away from the surface of the back plate portion 49 facing the resin panel 41. Therefore, the adhesive portion 52 is located between the shear center S and the back plate portion 49 in the front-rear direction, and is located near the shear center S.

Since the upper edge 15 and the lower edge 16 of the resin panel 41 of the present embodiment are longer than the right edge 17 and the left edge 18, when the resin panel 41 is thermally shrunk, the amount of shrinkage of the resin panel 41 in the left-right direction becomes the largest. Since the frame member 42 is adhered to the resin panel 41, a load in the left-right direction that brings the right side portion 45 and the left side portion 46 closer to each other is generated on the frame member 42 due to the heat shrinkage of the resin panel 41 in the left-right direction. .. In FIG. 6, the direction of the load during heat shrinkage is indicated by a white arrow.

In the present embodiment, since the adhesive portion 52 is located near the shear center S, even if a load in the left-right direction due to heat shrinkage of the resin panel 41 acts on the frame member 42, the area around the shear center S generated in the frame member 42 The moment is suppressed. Although not shown, the left side portion 46 is formed with an adhesive portion 52 that adheres the resin panel 41 and the back plate portion in the same manner as the right side portion 45.

Next, the operation of the back door panel 40 of the present embodiment will be described. For example, at a low temperature of about −30 ° C. below freezing point, the back door panel 40 heat-shrinks more than at room temperature. Due to the difference in linear expansion coefficient between the resin panel 41 and the frame member 42 in the back door panel 40, the heat shrinkage of the resin panel 41 in the left-right direction is larger than the heat shrinkage of the frame member 42. Therefore, a load is generated on the frame member 42 in the direction of attracting the right side portion 45 and the left side portion 46 to each other.

The adhesive portion 52 is located between the shear center S and the back plate portion 49 in the front-rear direction, and is located near the shear center S. Therefore, even if the frame member 42 receives a load through the adhesive portion 52, the moment of the shear center S generated in the frame member 42 is suppressed. Therefore, deformation due to the moment caused by the heat shrinkage that occurs in the resin panel 41 is suppressed. That is, even if the frame member 42 having a small coefficient of thermal expansion is adhered to the resin panel 41 having a large coefficient of thermal expansion, the thermal strain generated in the resin panel 41 is suppressed without improving the rigidity of the resin panel 41 and the frame member 42. To.

In the case of high temperature, the back door panel 40 thermally expands, and a load is generated on the frame member 42 in a direction in which the right side portion 45 and the left side portion 46 are separated from each other. The adhesive portion 52 is located between the shear center S and the back plate portion 49 in the front-rear direction, and is located near the shear center S. Therefore, even if the frame member 42 receives a load through the adhesive portion 52, the moment of the shear center S generated in the frame member 42 is suppressed without adding a member or the like to the resin panel 41 and the frame member 42, and the resin panel. Deformation due to the moment caused by the thermal expansion generated in 41 is suppressed. That is, the thermal strain of the resin panel 41 can be suppressed without improving the rigidity of the resin panel 41 and the frame member 42.

Further, in the present embodiment, the adhesive portion 52 is formed between the resin panel 41 and the frame member 42 in the front-rear direction. Therefore, the configurations of the resin panel 41 and the frame member 42 can be simplified as compared with the case where the adhesive portion is formed between the resin panel and the frame member in the left-right direction. By simplifying the configurations of the resin panel 41 and the frame member 42, the work of adhering the frame member 42 to the resin panel 41 becomes easy.

The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the gist of the invention. For example, the present invention may be modified as follows.

〇 In the first and second embodiments described above, the back door panel is exemplified as the opening / closing panel for the vehicle, but the opening / closing panel for the vehicle is not limited to the back door panel. The opening / closing panel for a vehicle may be, for example, a panoramic roof that can be opened / closed on the ceiling of the vehicle body, or a side window or side panel that can be opened / closed on the side of the vehicle body. In particular, it is effective to apply the present invention to an opening / closing panel that is relatively large and requires weight reduction.
〇 In the first embodiment described above, when the adhesive portion is projected in a direction parallel to the direction of the load generated by the frame member due to the thermal expansion and contraction of the resin panel, the shear center is included in the projection surface of the adhesive portion. This is not the case. For example, when the adhesive portion is projected in a direction parallel to the direction of the load generated by the frame member due to thermal expansion and contraction of the resin panel, the shear center may not be included in the projection surface of the adhesive portion. In this case, it is preferable that the shear center is close to the projection surface of the bonded portion, and even if a moment of the shear center is generated by the load received by the frame member, the deformation of the resin panel is kept within the allowable range suppressed more than the conventional deformation. Just do it.
〇 In the first embodiment described above, the panel extending portion is provided on a part of the resin panel and the frame extending portion is provided on a part of the frame member, but this is not the case. For example, the panel extending portion is provided over the entire resin panel and the frame extending portion is provided over the entire frame member so that the panel extending portion and the frame extending portion do not interfere with the hinge portion and the lock striker. May be good. Then, the adhesive portion may be formed over the frame extending portion and the entire frame member.

10, 40 Back door panel (opening and closing panel for vehicles)
11, 41 Resin panel 12, 42 Frame member 21 Panel body 22 Panel extension 23 Frame body 30 Hinge 31 Lock striker 32, 49 Back plate 33, 51 Side plate (right)
34, 52 Side plate (left)
35 Plates 36, 52 Adhesive S Shear center

Claims (4)

With a resin panel made of resin material,
In a vehicle opening / closing panel including a frame member formed of a carbon fiber reinforced resin having a coefficient of thermal expansion smaller than that of the resin panel and adhered to the inside of the resin panel.
An adhesive portion for adhering the resin panel and the frame member is provided, and the direction of the load acting on the adhesive portion due to thermal expansion and contraction of the resin panel is the shear center of the frame member. An opening / closing panel for vehicles characterized by being set in a pointing position. The frame member
A frame body having a U-shaped cross section that defines the shear center,
A frame extending portion extending from the frame main body portion to the shear center side is provided.
The resin panel is
A panel main body facing the opening side of the U-shaped cross section of the frame main body,
A panel extending portion extending from the panel main body portion and facing the frame extending portion is provided.
The opening / closing panel for a vehicle according to claim 1, wherein the adhesive portion is provided at a position where the frame extending portion and the panel extending portion are adhered to each other. The first aspect of the present invention, wherein when the adhesive portion is projected in a direction parallel to the direction of the load generated on the frame member due to thermal expansion and contraction of the resin panel, the shear center is included in the projection surface of the adhesive portion. Opening and closing panel for vehicles. With a resin panel made of resin material,
In a vehicle opening / closing panel including a frame member formed of a carbon fiber reinforced resin having a coefficient of thermal expansion smaller than that of the resin panel and adhered to the inside of the resin panel.
The frame member has a U-shaped cross section that defines the shear center and has a U-shaped cross section.
A vehicle characterized in that an adhesive portion for adhering the resin panel and the frame member is provided between the shear center and the frame member in a direction intersecting the direction of the load generated on the resin panel by heat shrinkage. Opening and closing panel for.

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