JP2017185911A - Dissimilar material adhesion structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dissimilar material adhesion structure capable of efficiently dispersing a stress applied to a joint part upon heat expansion or heat shrinkage of a joint part and capable of preventing exposure of an adhesion part to a joint part external part.SOLUTION: A dissimilar material adhesion structure allows end regions of first and second joint members which have thermal expansion coefficients different from each other and are arranged along a first direction to be joined to each other by using an adhesion part containing an adhesive. In such a structure, the end region of the first joint member is bent in an L-shape or J-shape so as to have a base part elongated in the first direction and a flange part elongated from a tip of the base part, the end region of the second joint member is bent so as to have a base part elongated in the second direction intersecting the first direction and a flange part arranged along the first direction, and the adhesion part is sandwiched between the base part of the L-shaped end region and the flange part of the second joint member or the flange part of the second joint member is embedded into an adhesion part arranged in a concave space of the J-shaped end region on the first joint member.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a dissimilar material bonding structure in which two bonding members having different coefficients of thermal expansion are bonded by an adhesive.

  For parts such as transport machines and devices used in various industrial fields, a dissimilar material bonding structure in which two bonding members having different coefficients of thermal expansion are bonded with an adhesive is employed. Sometimes. For example, a dissimilar material adhesion in which a sheet metal inner panel and a plastic outer panel are bonded to each other with a bonding agent on a vehicle part such as an automobile, particularly a part having a large area such as an engine hood of an automobile. A structure may be adopted.

  However, in the dissimilar material bonding structure, when a joined body obtained by joining two joining members thermally expands or shrinks due to a temperature change in the external environment, the deformation amounts of the two joining members are different. In this case, stress concentration due to the formation of wrinkles or the like may occur in the joint portion, and as a result, the joint portion may be peeled off. Accordingly, various dissimilar material bonding structures have been proposed to disperse such stress.

  As an example of the dissimilar material bonding structure, a sheet metal inner panel and a plastic outer panel that are disposed along the back door (rear gate body) on the rear surface of the vehicle body and that face each other are provided. An end region of the outer panel formed in an L shape so as to have a base portion extending along the door and a flange portion (projection portion) projecting from the longitudinal tip of the base portion toward the end region of the outer panel. Is a dissimilar material bonding structure formed so as to have a base portion extending along the back door and a groove portion that is located at a longitudinal tip of the base portion and opens toward an end region of the inner panel. The adhesive is made of an adhesive in which the flange portion of the inner panel is inserted into the groove portion of the outer panel through the opening and filled in the groove portion. In a state of being embedded in the (sealing member), the end regions of the inner panel and the outer panel are joined together, and dissimilar materials bonded structure. (For example, see Patent Document 1.)

  As another example of the dissimilar material bonding structure, a sheet metal inner panel and a plastic outer panel which are disposed along the automobile hood and face each other, and a bracket including a groove portion having an L-shaped cross section. Provided, and the end region of the inner panel is formed in a crank shape so as to have a base portion extending along the hood and a tip portion arranged to be shifted to the outer panel side with respect to the base portion. The dissimilar material bonding structure is formed so as to extend along the hood, and the bracket is opened to open the groove toward the vehicle upper side and the end region of the inner panel, and the upper end of the bracket is bonded It is joined to the end area of the outer panel by the agent, and the tip of the inner panel is connected to the groove of the outer panel and the bracket. Inserted into the enclosed space through the opening and embedded in an adhesive portion made of an adhesive filled in the space, the end regions of the inner panel and the outer panel are joined to each other. Examples include a material adhesion structure. (For example, see Patent Document 2.)

JP 2013-141877 A JP 2007-118852 A

  However, in an example of the dissimilar material bonding structure, when the flange portion in the end region of the inner panel is bent due to a load based on a difference in deformation amount between the two joining members generated during thermal expansion or shrinkage of the joined body, There is a possibility that the flange part may come off from the bonded part. Further, in another example of the dissimilar material adhesion structure, there is a possibility that the adhesion between the end region of the outer panel and the bracket is peeled off due to the load described above. Therefore, it is desired that the dissimilar material adhesion structure be further improved in that it efficiently absorbs the load described above.

  Furthermore, in an example of the dissimilar material bonding structure, the bonding portion between the inner panel and the outer panel is exposed outside the joined body obtained by bonding the inner panel and the outer panel. In another example of the dissimilar material bonding structure, the bonding portion between the outer panel and the bracket is exposed to the outside of the joined body obtained by bonding the inner panel, the outer panel, and the bracket. Thus, when the operator etc. who handle a conjugate | zygote touch the adhesion part exposed to the exterior of a conjugate | zygote, there exists a possibility that the adhesive agent of an adhesion part may adhere to a worker etc. Therefore, it is also desired to prevent the adhesion part from being exposed to the outside of the joined body.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to efficiently disperse the stress applied to the joint portion when the joined body is thermally expanded or contracted, and the joined body. An object of the present invention is to provide a dissimilar material bonding structure capable of preventing the adhesion portion from being exposed to the outside.

  In order to solve the problem, according to the dissimilar material adhesion structure according to the first or second aspect of the present invention, the first and second joining members having different thermal expansion coefficients are provided. In the dissimilar material bonding structure, the bonding members are arranged along the first direction so as to face each other, and the end regions of the first and second bonding members are bonded to each other using an adhesive. The end region of the first joining member is bent in an L shape so as to have a base portion extending in the first direction and a flange portion protruding from the tip in the first direction in the base portion, An end region of the second joining member is bent so as to have a base portion extending in a second direction intersecting the first direction and a flange portion disposed along the first direction; The bonding portion including the adhesive is the first bonding member. While being sandwiched between the flange portion of the base portion and the second joint members, the end regions of the first and second joint members are joined by the adhesive portion. Therefore, the load caused by the difference in deformation amount in the first and second joining members generated at the time of thermal expansion or contraction of the joined body, the bending of the base portion in the second joining member, the base portion of the first joining member, and It can absorb efficiently by the deformation | transformation of the adhesion part which joined the flange part of the 2nd joining member. As a result, the stress applied to the joint portion at the time of thermal expansion or contraction of the joined body can be efficiently dispersed. When the coefficient of thermal expansion of the first bonding member is larger than that of the second bonding member, the first bonding member is made of plastic and the second bonding member is made of metal. In this case, it is possible to more efficiently disperse the stress applied to the bonded portion when the bonded body is thermally expanded or contracted. Furthermore, since the adhesion part which joins the 1st and 2nd joining members is hidden by the base part and flange part of the 1st joining member, and the flange part of the 2nd joining member, exposure of the adhesion part to the exterior of a joined object is carried out. Can be prevented. That is, according to the dissimilar material bonding structure according to the first or second aspect of the present invention, it is possible to efficiently disperse the stress applied to the bonded portion when the bonded body is thermally expanded or contracted, and the bonded body exterior. It is possible to prevent the adhesion part from being exposed to.

  According to the dissimilar material adhesion structure according to the first aspect of the present invention, the flange portion of the second joining member is arranged such that the first joining member is disposed at the base of the second joining member from the tip in the second direction. Extending along the base. Therefore, the load resulting from the difference in deformation amount between the first and second joining members as described above can be more efficiently absorbed by the bending of the base portion and the deformation of the bonding portion in the second joining member.

  According to the dissimilar material bonding structure according to the second aspect of the present invention, the flange portion of the second joining member is folded back from the center side wall extending from the tip of the base portion of the second joining member, and the tip of the center side wall. And the adhesive portion extends in the U-shape so as to have a folded area that is curved in such a manner and an end side wall that extends from the tip of the folded area along the base of the first joining member. The end regions of the first and second joining members are joined by the adhesive portion in a state sandwiched between the base portion of the member and the end side wall of the flange portion of the second joining member. Therefore, the load resulting from the difference in deformation amount between the first and second joining members as described above is added to the bending of the base portion and the deformation of the bonding portion in the second joining member, and the U in the second joining member. It can absorb more efficiently by deformation | transformation of a letter-shaped flange part.

  According to the dissimilar material bonding structure according to the first or second aspect of the present invention, the bonding portion is formed on the entire outer surface of the flange portion of the second bonding member facing the base portion of the first bonding member. It is arranged to spread. Therefore, the load resulting from the difference in deformation amount between the first and second joining members as described above can be received by the entire outer surface of the flange portion of the second joining member.

  In order to solve the problem, according to the dissimilar material bonding structure according to the third or fourth aspect of the present invention, the first and second joining members having different thermal expansion coefficients are provided. In the dissimilar material bonding structure, the bonding members are arranged along the first direction so as to face each other, and the end regions of the first and second bonding members are bonded to each other using an adhesive. The end region of the first joining member is bent in a J shape so as to have a base portion extending in the first direction and a flange portion extending in an L shape from the tip of the base portion in the first direction. And an end region of the second joining member is bent so as to have a base portion extending in a second direction intersecting the first direction and a flange portion disposed along the first direction. At the flange portion of the second joining member. The tip section in the first direction is inserted into the interior of the concave space through the opening of the concave space defined by the base and the flange portion in the first joining member, and includes an adhesive. Is disposed in the concave space, and the end region of the first and second joining members is joined by the adhesive portion in a state where the tip end area of the flange portion of the second joining member is embedded in the adhesive portion. Has been. Therefore, the load caused by the difference in deformation amount in the first and second joining members generated at the time of thermal expansion or contraction of the joined body is applied to the deformation of the L-shaped flange portion in the first joining member and the second Absorption can be efficiently absorbed by the bending of the base portion of the joining member and the deformation of the adhesive portion that is disposed in the concave space of the first joining member and embeds the distal end area of the flange portion of the second joining member. As a result, the stress applied to the joint portion at the time of thermal expansion or contraction of the joined body can be efficiently dispersed. When the coefficient of thermal expansion of the first bonding member is larger than that of the second bonding member, the first bonding member is made of plastic and the second bonding member is made of metal. In this case, it is possible to more efficiently disperse the stress applied to the bonded portion when the bonded body is thermally expanded or contracted. Furthermore, since the adhesion part which joined the 1st and 2nd joining member is hidden by the base part and flange part of a 1st joining member, exposure of the adhesion part to a joining body exterior can be prevented. That is, according to the dissimilar material adhesion structure according to the third or fourth aspect of the present invention, it is possible to efficiently disperse the stress applied to the bonded portion when the bonded body is thermally expanded or contracted, and to the outside of the bonded body. It is possible to prevent the adhesion part from being exposed to.

  According to the dissimilar material adhesion structure according to the third aspect of the present invention, the flange portion of the second joining member extends from the tip in the second direction at the base portion of the second joining member in the first direction. Extending along. Therefore, the load caused by the difference in deformation amount between the first and second joining members as described above is applied to the deformation of the flange portion in the first joining member, the deflection of the base portion in the second joining member, and the bonding portion. More efficient absorption can be achieved by deformation.

  According to the dissimilar material adhesion structure according to the fourth aspect of the present invention, the flange portion of the second joining member extends in a U shape from the tip in the second direction at the base of the second joining member. Yes. Therefore, the load caused by the difference in deformation amount between the first and second joining members as described above is applied to the deformation of the flange portion in the first joining member, the deflection of the base portion in the second joining member, and the bonding portion. In addition to the deformation, the U-shaped flange portion of the second joining member can be more efficiently absorbed by the deformation.

  According to the dissimilar material adhesion structure according to the third or fourth aspect of the present invention, a plurality of notches are formed in the bent portion in the end region of the second joining member. Therefore, the residual stress generated when the bent portion is formed can be efficiently dispersed by the plurality of cutout portions of the bent portion in the end region of the second bonding member.

  According to the dissimilar material adhesion structure according to the first to fourth aspects of the present invention, it is possible to efficiently disperse the stress applied to the joined portion during thermal expansion or thermal contraction of the joined body, and adhesion to the outside of the joined body. The exposure of the part can be prevented.

It is sectional drawing which shows typically the edge area | region of the conjugate | zygote containing the dissimilar-materials adhesion structure which concerns on 1st Embodiment of this invention. It is sectional drawing which shows typically the edge area | region of the conjugate | zygote containing the dissimilar-materials adhesion structure which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows typically the edge area | region of the conjugate | zygote containing the dissimilar-materials adhesion structure which concerns on 3rd Embodiment of this invention. It is sectional drawing which shows typically the edge area | region of the conjugate | zygote containing the dissimilar-materials adhesion structure which concerns on 4th Embodiment of this invention.

  The dissimilar material adhesion structure according to the first to fourth embodiments of the present invention will be described below. In addition, the dissimilar-material joining structure which concerns on each embodiment is applicable to joined bodies like components, such as a machine and an apparatus utilized in various industrial fields. For example, such a joined body is preferably a part of a vehicle such as an automobile, and in particular, the joined body is preferably a part having a large area such as an engine hood or a back door of an automobile.

[First Embodiment]
The joined body including the dissimilar material adhesion structure according to the first embodiment of the present invention will be described.

[Basic configuration]
The basic configuration of the components of the joined body will be described. As shown in FIG. 1, the joined body includes a first joining member 1 made using a resin and a second joining member 2 made using a metal, and the first joining member The thermal expansion coefficient of 1 is higher than the thermal expansion coefficient of the second bonding member 2. In particular, the first joining member 1 is preferably a plastic member produced by injection molding, and the second joining member 2 is preferably a sheet metal member produced by press molding. The first and second joining members 1 and 2 are also disposed along the first direction (indicated by arrow A) in a state of facing each other. Such 1st and 2nd joining members 1 and 2 are joined using adhesion part 3 which consists of adhesives.

  However, the basic structure of the joined body including the dissimilar material adhesion structure of the present invention is not limited to this, and may be as follows. As long as the first and second joining members have different coefficients of thermal expansion, the coefficient of thermal expansion of the first joining member 1 may be lower than the coefficient of thermal expansion of the second joining member. Moreover, the 1st joining member may be produced using materials other than resin, for example, the 1st joining member may be produced using the metal. The 2nd joining member may be produced using materials other than a metal, for example, the 2nd joining member may be produced using resin. The adhesive portion may contain other materials such as a curing agent, impurities, and the like in addition to the adhesive.

[Specific configuration]
Specific configurations of the first bonding member 1, the second bonding member 2, and the bonding portion 3 will be described. As shown in FIG. 1, an end region 4 that is at least a part of the outer peripheral edge region of the first joining member 1 protrudes from a base 5 extending in the first direction and a tip of the base 5 in the first direction. It is formed to be bent in a substantially L shape so as to have a flange portion 6 that performs. The base part 5 and the flange part 6 in the first joining member 1 are integrated. The flange portion 6 extends in a direction intersecting the first direction, and in particular, the flange portion 6 is preferably extended in a direction substantially orthogonal to the first direction.

  An end region 7 which is at least a part of the outer peripheral edge region of the second joining member 2 includes a base portion 8 extending in a second direction (indicated by an arrow B), and a flange portion 9 disposed along the first direction. Are bent into a substantially L shape so that The second direction intersects with the first direction, and in particular, the second direction is preferably substantially orthogonal to the first direction. The base portion 8 and the flange portion 9 in the second joining member 2 are integrated. Specifically, the flange portion 9 extends from the distal end of the base portion 8 in the second direction along the base portion 5 of the first joining member 1.

  The outer side surface 9 a of the flange portion 9 in the second bonding member 2 faces the inner side surface 5 a of the base portion 5 in the first bonding member 1. Further, the tip end section 9 b in the first direction in the flange portion 9 of the second joining member 2 is spaced from the flange portion 6 of the first joining member 1 in the first direction. However, this invention is not limited to this, The front end area of the flange part in a 2nd joining member may contact | abut to the flange part in a 1st joining member.

  In particular, the bent portion 10 of the end region 7 located between the base portion 8 and the flange portion 9 of the second bonding member 2 is preferably formed to be curved. It is preferable that a plurality of notches 10b that are recessed in the direction from the inner periphery to the outer periphery of the bent portion 10 are formed on the inner peripheral surface 10a of the bent portion 10 that is curved. The notch 10b is also preferably extended along the outer circumferential direction of the second bonding member 2. In FIG. 1, only two notches 10b are shown. The plurality of cutout portions 10b are preferably arranged at intervals in the circumferential direction of the bent portion 10 extending while being curved.

  The bonding portion 3 is disposed on a part of the outer surface 9 a of the flange portion 9 in the second bonding member 2, and in particular, the bonding portion 3 is formed on the outer surface 9 a of the flange portion 9 in the second bonding member 2. It is preferable that they are arranged so as to spread throughout. Further, the bonding portion 3 is sandwiched between the inner surface 5 a of the base portion 5 in the first bonding member 1 and the outer surface 9 a of the flange portion 9 in the second bonding member 2.

  In such a state that the adhesive portion 3 is in contact with the inner side surface 5a of the base portion 5 in the first bonding member 1 and the outer side surface 9a of the flange portion 9 in the second bonding member 2, the first and second bonding members. The end regions 4 and 7 of 1 and 2 are joined by the bonding part 3.

[Action and effect]
As described above, according to the dissimilar material adhesion structure according to the present embodiment, the load caused by the difference in the deformation amount in the first and second joining members 1 and 2 generated at the time of thermal expansion or thermal contraction of the joined body, It is efficiently absorbed by the bending of the base portion 8 in the second bonding member 2 and the deformation of the bonding portion 3 where the base portion 5 of the first bonding member 1 and the flange portion 9 of the second bonding member 2 are bonded. it can. As a result, the stress applied to the joint portion at the time of thermal expansion or contraction of the joined body can be efficiently dispersed. In particular, since the first bonding member 1 is made of a resin and the second bonding member 2 is made of a metal, the stress applied to the bonded portion at the time of thermal expansion or thermal contraction of the bonded body is efficiently obtained. Can be dispersed. Furthermore, the adhesive portion 3 that joins the first and second joining members 1 and 2 is hidden by the base portion 5 and the flange portion 6 of the first joining member 1 and the flange portion 9 of the second joining member 2. It is possible to prevent the adhesion part 3 from being exposed to the outside of the joined body. That is, according to the dissimilar material bonding structure according to the present embodiment, the stress applied to the bonded portion when the bonded body thermally expands or contracts can be efficiently dispersed, and the bonding portion 3 to the outside of the bonded body can be dispersed. Exposure can be prevented.

  According to the dissimilar material bonding structure according to the present embodiment, the load due to the difference in deformation amount between the first and second joining members 1 and 2 as described above is caused by the bending of the base portion 8 in the second joining member 2. And it can absorb more efficiently by the deformation | transformation of the adhesion part 3. FIG.

  According to the dissimilar material bonding structure according to the present embodiment, when the bonding portion 3 is arranged so as to spread over the entire outer surface 9a of the flange portion 9 in the second bonding member 2, the first bonding member The load resulting from the deformation of 1 can be received by the entire outer surface 9 a of the flange portion 9 in the second joining member 2.

[Second Embodiment]
The joined body including the dissimilar material adhesion structure according to the second embodiment of the present invention will be described.

  As shown in FIG. 2, the joined body including the dissimilar material adhesion structure according to the present embodiment includes a first joining member 1, a second joining member 11, and an adhesive portion 12. The basic configuration and specific configuration of the first joining member 1 in the present embodiment are the same as those in the first embodiment. The basic configurations of the second bonding member 11 and the bonding portion 12 in the present embodiment are the same as the basic configurations of the second bonding member 2 and the bonding portion 3 in the first embodiment, respectively. The specific configurations of the second bonding member 11 and the bonding portion 12 in the embodiment are different from the specific configurations of the second bonding member 2 and the bonding portion 3 in the first embodiment, as described below. Yes.

[Specific configuration]
Specific configurations of the second bonding member 11 and the bonding portion 12 will be described. As shown in FIG. 2, an end region 13 that is at least a part of the outer peripheral region of the second joining member 11 includes a base portion 14 extending in a second direction (indicated by an arrow B) and a first direction. And is formed so as to be bent. The second direction intersects with the first direction (indicated by arrow A), and in particular, the second direction is preferably substantially orthogonal to the first direction. The base portion 14 and the flange portion 15 in the second joining member 11 are integrated. Specifically, the flange portion 15 includes a central side wall 16 extending from the distal end of the base 14 in the second joining member 11, a folded area 17 that is bent so as to be folded back from the distal end of the central side wall 16, and the folded area 17. And an end side wall 18 extending along the base portion 5 of the first joining member 1.

  The outer side surface 18 a of the end side wall 18 in the flange portion 15 of the second bonding member 11 faces the inner side surface 5 a of the base portion 5 in the first bonding member 1. The front end region in the first direction in the flange portion 15 of the second joining member 11, that is, the folded region 17 is spaced from the flange portion 6 of the first joining member 1 in the first direction. However, the present invention is not limited to this, and the folded-back area of the flange portion in the second joining member may abut on the flange portion in the first joining member.

  In particular, the bent portion 19 of the end region 13 located between the base portion 14 of the second joining member 11 and the central side wall 16 of the flange portion 15 is preferably formed to be curved. It is preferable that a plurality of notches 19 b that are recessed in the direction from the inner periphery to the outer periphery of the bent portion 19 are formed on the inner peripheral surface 19 a of the bent portion 19. The notch 19b is also preferably extended along the outer peripheral direction of the second bonding member 11. In FIG. 2, only two notches 19b are shown. The plurality of notches 19b are preferably arranged at intervals in the circumferential direction of the bent portion 19 that extends while being curved.

  The folded area 17 formed by bending as described above also corresponds to a bent portion of the end region 13 in the second bonding member 11. It is preferable that a plurality of notches 17b that are recessed in the direction from the inner circumference to the outer circumference of the folded area 17 are formed on the inner circumferential surface 17a of the curved folded area 17. The notch 17b is also preferably extended along the outer peripheral direction of the second bonding member 11. In FIG. 2, only two notches 17b are shown. The plurality of notches 17b are preferably arranged at intervals in the circumferential direction of the folded area 17 extending while being curved.

  The bonding portion 12 is disposed on a part of the outer surface 18 a of the end side wall 18 in the flange portion 15 of the second bonding member 11. In particular, the bonding portion 12 is in the flange portion 15 of the second bonding member 11. It is preferable that the end wall 18 is disposed so as to spread over the entire outer surface 18a. Further, the bonding portion 12 is sandwiched between the inner surface 5 a of the base portion 5 in the first bonding member 1 and the outer surface 18 a of the end side wall 18 of the flange portion 15 in the second bonding member 11.

  In such a state that the adhesive portion 12 is in contact with the inner side surface 5 a of the base portion 5 in the first joining member 1 and the outer side surface 18 a of the end side wall 18 in the flange portion 15 of the second joining member 11. The end regions 4 and 13 of the two joining members 1 and 11 are joined by the adhesive portion 12.

[Action and effect]
As described above, according to the dissimilar material bonding structure according to the present embodiment, except for the action and effect based on the bending of the base 8 and the deformation of the bonding portion 3 in the second bonding member 2 of the first embodiment, Functions and effects similar to those of the embodiment can be obtained.

  Furthermore, according to the dissimilar material bonding structure according to the present embodiment, the load caused by the difference in deformation amount of the first and second bonding members 1 and 11 generated at the time of thermal expansion or thermal contraction of the bonded body In addition to the bending of the base portion 14 and the deformation of the bonding portion 12 in the bonding member 11, the deformation can be more efficiently absorbed by the deformation of the substantially U-shaped flange portion 15 in the second bonding member 11.

[Third Embodiment]
A joined body including a dissimilar material adhesion structure according to a third embodiment of the present invention will be described.

  As shown in FIG. 3, the joined body including the dissimilar material adhesion structure according to the present embodiment includes a first joining member 21, a second joining member 22, and an adhesion portion 23. The basic configurations of the first joining member 21, the second joining member 22, and the bonding portion 23 in the present embodiment are respectively the first joining member 1, the second joining member 2, and the first embodiment. Although it is the same as the basic structure of the adhesion part 3, the specific structure of the 1st joining member 21, the 2nd joining member 22, and the adhesion part 23 in this embodiment is respectively described as follows. It differs from the specific structure of the 1st joining member 1, the 2nd joining member 2, and the adhesion part 3 in 1st Embodiment.

[Specific configuration]
Specific configurations of the first bonding member 21, the second bonding member 22, and the bonding portion 23 will be described. As shown in FIG. 3, an end region 24 that is at least a part of the outer peripheral edge region of the first joining member 21 includes a base portion 25 that extends in a first direction (indicated by an arrow A), and a first portion in the base portion 25. And bent in a substantially J shape so as to have a flange portion 26 extending in a substantially L shape from the tip in the direction of. The base portion 25 and the flange portion 26 in the first joining member 21 are integrated. The flange portion 26 extends from the distal end of the base portion 25 in the direction intersecting the first direction, and extends from the distal end of the proximal end portion 26a in the direction intersecting the first direction and extends from the distal end of the base portion 25. And a distal end side area 26b. In particular, the proximal end area 26a preferably extends in a direction substantially orthogonal to the first direction, and the distal end area 26b preferably extends substantially parallel to the first direction.

  An end region 27 that is at least a part of the outer peripheral edge region of the second joining member 22 includes a base portion 28 extending in a second direction (indicated by an arrow B), and a flange portion 29 disposed along the first direction. Are bent into a substantially L shape so that The second direction intersects with the first direction, and in particular, the second direction is preferably substantially orthogonal to the first direction. The base portion 28 and the flange portion 29 in the second joining member 22 are integrated. Specifically, the flange portion 29 extends from the distal end of the base portion 28 in the second direction along the first direction. A concave space 24 a defined by the base portion 25 and the flange portion 26 is formed in the end region 24 of the first joining member 21.

  The flange portion 29 of the second joining member 22 is spaced apart from the base 25 and the distal end side region 26b of the flange portion 26 of the first joining member 21 in the second direction. However, this invention is not limited to this, The flange part in a 2nd joining member may contact | abut either one of the base part in a 1st joining member, and the front end side area of a flange part. A distal end area 29 a in the first direction in the flange portion 29 of the second bonding member 22 is inserted into the concave space 24 a through the opening of the concave space 24 a of the first bonding member 21. The distal end area 29 a in the first direction in the flange portion 29 of the second joining member 22 is spaced in the first direction from the proximal end side area 26 a of the flange portion 26 in the first joining member 21. . However, the present invention is not limited to this, and the tip end region in the first direction in the flange portion of the second joining member may abut on the proximal end side region of the flange portion in the first joining member.

  The bent portion 30 of the end region 27 located between the base portion 28 and the flange portion 29 in the second bonding member 22 is formed to be curved. A plurality of notches 30b that are recessed in the direction from the inner periphery to the outer periphery of the bent portion 30 are formed on the inner peripheral surface 30a of the bent portion 30 that is curved. The notch 30 b also extends along the outer peripheral direction of the second bonding member 22. In FIG. 3, only two notches 30b are shown. The plurality of notches 30b are arranged at intervals in the circumferential direction of the bent portion 30 that extends while curving.

  The bonding portion 23 is disposed in the concave space 24 a of the first bonding member 21. In particular, the bonding portion 23 is preferably arranged so as to occupy the bottom portion of the concave space 24a. Note that the bottom of the concave space 24 a is formed by the proximal-side area 26 a of the flange portion 26 of the first joining member 21 that faces the opening.

  The tip region 29a of the flange portion 29 of the second bonding member 22 is embedded in the bonding portion 23, and the end regions 24 and 27 of the first and second bonding members 21 and 22 are bonded to the bonding portion 23. Are joined by.

[Action and effect]
As described above, according to the dissimilar material adhesion structure according to the present embodiment, the load caused by the difference in the deformation amount of the first and second joining members 21 and 22 generated at the time of thermal expansion or thermal contraction of the joined body, The first joint member 21 is disposed in the substantially L-shaped flange portion 26, the base member 28 is bent in the second joint member 22, and the concave space 24 a in the first joint member 21. It can absorb efficiently by the deformation | transformation of the adhesion part 23 which embedded the front-end | tip area | region 29a of the flange part 29 in the joining member 22. FIG. As a result, the stress applied to the joint portion at the time of thermal expansion or contraction of the joined body can be efficiently dispersed. In particular, since the first bonding member 21 is made of plastic and the second bonding member 22 is made of metal, the stress applied to the bonded portion during thermal expansion or contraction of the bonded body can be more efficiently dispersed. Can do. Furthermore, since the adhesion part 23 which joined the 1st and 2nd joining members 21 and 22 is hidden by the base 25 and the flange part 26 of the 1st joining member 21, exposure of the adhesion part 23 to the exterior of a joined body is prevented. be able to. That is, according to the dissimilar material bonding structure according to the present embodiment, the stress applied to the bonded portion when the bonded body thermally expands or contracts can be efficiently dispersed, and the bonding portion 23 to the outside of the bonded body can be dispersed. Exposure can be prevented.

  According to the dissimilar material adhesion structure according to the present embodiment, the load caused by the difference in deformation amount between the first and second joining members 21 and 22 as described above is applied to the flange portion 26 of the first joining member 21. The deformation, the bending of the base 28 in the second bonding member 22, and the deformation of the bonding portion 23 can be absorbed more efficiently.

  According to the dissimilar material bonding structure according to the present embodiment, the residual stress generated when the bent portion 30 is formed by the plurality of notches 30b of the bent portion 30 in the end region 27 of the second joining member 22 is efficiently generated. Can be dispersed.

[Fourth Embodiment]
A joined body including a dissimilar material adhesion structure according to a fourth embodiment of the present invention will be described.

  As shown in FIG. 4, the joined body including the dissimilar material adhesion structure according to the present embodiment includes a first joining member 21, a second joining member 31, and an adhesion part 23. The basic configuration and specific configuration of the first joining member 21 and the bonding portion 23 in the present embodiment are the same as those in the third embodiment. The basic configuration of the second bonding member 31 in the present embodiment is the same as the basic configuration of the second bonding member 22 in the third embodiment, but the second bonding member 31 in the present embodiment. Each of the specific configurations is different from the specific configuration of the second bonding member 22 in the third embodiment, as described below.

[Specific configuration]
A specific configuration of the second bonding member 31 will be described. As shown in FIG. 4, an end region 32 that is at least a part of the outer peripheral region of the second joining member 31 includes a base portion 33 that extends in a second direction (indicated by an arrow B), and a first direction. And a flange portion 34 arranged in a bent manner. The second direction intersects with the first direction (indicated by arrow A), and in particular, the second direction is preferably substantially orthogonal to the first direction. The base portion 33 and the flange portion 34 in the second joining member 31 are integrated. Specifically, the flange portion 34 includes a central side wall 35 extending from the distal end of the base portion 33 in the second joining member 31, a folded area 36 that is bent so as to be folded back from the distal end of the central side wall 35, and the folded area 36. It extends in a substantially U shape so as to have an end side wall 37 extending in the first direction from the tip of the first end.

  The end side wall 37 of the flange portion 34 in the second joining member 31 is spaced from the base portion 25 in the first joining member 21 in the second direction, and the center of the flange portion 34 in the second joining member 31. The side wall 35 is spaced apart from the distal end side region 26 b of the flange portion 26 in the first joining member 21 in the second direction. However, this invention is not limited to this, The end side wall of the flange part in a 2nd joining member may contact | abut with the base part in a 1st joining member. Further, the central side wall 35 of the flange portion 34 in the second joining member 31 may abut on the distal end side area 26 b of the flange portion 26 in the first joining member 21. The front end area in the first direction in the flange portion 34 of the second joining member 31, that is, the folded area 36 is inserted into the recessed space 24 a through the opening of the recessed space 24 a of the first joining member 21. Yes. Further, the folded area 36 in the flange portion 34 of the second joining member 31 is spaced in the first direction with respect to the proximal end side area 26 a of the flange portion 26 in the first joining member 21. However, the present invention is not limited to this, and the folded-back area of the flange portion in the second joining member may abut on the proximal end side area of the flange portion in the first joining member.

  A bent portion 38 of the end region 32 located between the base 33 and the central side wall 35 of the flange portion 34 in the second joining member 31 is formed to be curved. A plurality of cutout portions 38 b that are recessed in the direction from the inner periphery to the outer periphery of the bent portion 38 are formed on the inner peripheral surface 38 a of the bent portion 38. The notch 38 b also extends along the outer peripheral direction of the second bonding member 31. In FIG. 4, only two notches 38b are shown. The plurality of notches 38b are arranged at intervals in the circumferential direction of the bent portion 38 that extends while being curved.

  The folded area 36 formed by bending as described above also corresponds to a bent portion of the end region 32 in the second joining member 31. A plurality of notches 36 b that are recessed in the direction from the inner periphery to the outer periphery of the folded region 36 are formed on the inner circumferential surface 36 a of the curved folded region 36. The notch 36 b also extends along the outer peripheral direction of the second bonding member 31. In FIG. 5, only two notches 36b are shown. The plurality of notches 36b are arranged at intervals in the circumferential direction of the folded area 36 that extends while being curved.

  The end regions 24 and 32 of the first and second bonding members 21 and 31 are bonded to the bonding portion 23 in a state in which the folded area 36 in the flange portion 34 of the second bonding member 31 is embedded in the bonding portion 23. Are joined by.

[Action and effect]
As described above, according to the dissimilar material bonding structure according to this embodiment, the flange portion 26 of the first bonding member 21 of the third embodiment is deformed, the base portion 28 of the second bonding member 22 is bent, and bonded. Except for the action and effect based on the deformation of the portion 23, the same action and effect as the action and effect of the third embodiment can be obtained.

  Furthermore, according to the dissimilar material adhesion structure according to the present embodiment, the load caused by the difference in deformation amount between the first and second joining members 21 and 31 generated at the time of thermal expansion or thermal contraction of the joined body is reduced to the first. In addition to the deformation of the flange portion 26 in the joining member 21, the deflection of the base portion 33 in the second joining member 31, and the deformation of the adhesive portion 23, the deformation of the substantially U-shaped flange portion 34 in the second joining member 31 Furthermore, it can absorb efficiently.

  Although the embodiment of the present invention has been described so far, the present invention is not limited to the above-described embodiment, and the present invention can be modified and changed based on its technical idea.

DESCRIPTION OF SYMBOLS 1 1st joining member, 2nd 2nd joining member, 3 adhesion part, 4 end area | region, 5 base part, 6 flange part, 7 end area | region, 8 base part, 9 flange part, 9a outer side surface, 9b tip area, 10 bending Part, 10b Notch part 11 2nd joining member, 12 Adhesive part, 13 End region, 14 Base part, 15 Flange part, 16 Central side wall, 17 Folded area, 17b Notch part, 18 End side wall, 18a Outer side face, 19 Bent part , 19b Notch portion 21 First joining member, 22 Second joining member, 23 Adhesive portion, 24 End region, 24a Concave space, 25 Base portion, 26 Flange portion, 27 End region, 28 Base portion, 29 Flange portion, 29a Tip Area, 30 bent portion, 30b cutout portion 31 second joining member, 32 end region, 33 base portion, 34 flange portion, 36 folded region, 36b cutout portion, 38 bent portion, 38b cutout portion , B arrow

Claims (8)

Comprising first and second joining members having different coefficients of thermal expansion;
The first and second joining members are disposed along the first direction in a state of facing each other;
In the dissimilar material bonding structure in which end regions of the first and second bonding members are bonded to each other using an adhesive,
An end region of the first joining member is bent in an L shape so as to have a base portion extending in the first direction and a flange portion projecting from a tip of the base portion in the first direction;
An end region of the second joining member is bent so as to have a base portion extending in a second direction intersecting the first direction and a flange portion disposed along the first direction;
In a state where the adhesive portion including the adhesive is sandwiched between the base portion of the first joining member and the flange portion of the second joining member, the end regions of the first and second joining members are formed by the adhesive portion. Bonded dissimilar material bonding structure.   2. The heterogeneity according to claim 1, wherein a flange portion of the second joining member extends along a base portion of the first joining member from a tip in the second direction at a base portion of the second joining member. Material adhesion structure. The flange portion of the second joining member has a central side wall extending from the distal end of the base portion of the second joining member, a folded area that is bent so as to be folded back from the distal end of the central side wall, and the first side from the distal end of the folded area. Extending in a U shape so as to have an end side wall extending along the base of one joining member,
In a state where the bonding portion is sandwiched between the base portion of the first bonding member and the end side wall of the flange portion of the second bonding member, the end regions of the first and second bonding members are bonded by the bonding portion. The dissimilar material adhesion structure according to claim 1, wherein   The said adhesion part is arrange | positioned so that it may spread over the whole outer surface of the flange part in the said 2nd joining member facing the base of the said 1st joining member. The dissimilar material adhesion structure described. Comprising first and second joining members having different coefficients of thermal expansion;
The first and second joining members are disposed along the first direction in a state of facing each other;
In the dissimilar material bonding structure in which end regions of the first and second bonding members are bonded to each other using an adhesive,
The end region of the first joining member is bent in a J shape so as to have a base portion extending in the first direction and a flange portion extending in an L shape from the tip of the base portion in the first direction. And
An end region of the second joining member is bent so as to have a base portion extending in a second direction intersecting the first direction and a flange portion disposed along the first direction;
The tip region in the first direction in the flange portion of the second joining member is inserted into the concave space through an opening in the concave space defined by the base and the flange portion in the first joining member. And
The ends of the first and second joining members are disposed in a state in which the adhesive portion including the adhesive is disposed in the concave space and the tip end area of the flange portion of the second joining member is embedded in the adhesive portion. A dissimilar material bonding structure in which regions are joined by the bonding portion.   The dissimilar material adhesion structure according to claim 5, wherein the flange portion of the second joining member extends along the first direction from a tip in the second direction at the base portion of the second joining member. .   The dissimilar material bonding structure according to claim 5, wherein the flange portion of the second joining member extends in a U shape from a tip in the second direction at a base portion of the second joining member.   The dissimilar-materials adhesion structure as described in any one of Claims 5-7 in which the some notch part is formed in the bending part in the edge area | region of the said 2nd joining member.

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