JP6521135B2 - Bonding structure of vehicle members and method of bonding vehicle members - Google Patents

Description

  The present invention relates to a joining structure of vehicle members and a joining method of vehicle members.

  Patent Document 1 discloses a metal frame member and an FRP made of CFRP (carbon fiber reinforced resin composite material) as a joint structure in which a metal member (metal member) and a resin member (resin member) are joined. A structure in which the plate is fastened with a bolt is described. In addition, a metal reinforcing plate is bonded onto the FRP plate by an adhesive, and a technique is disclosed in which the bonding area between the reinforcing plate and the FRP plate is changed to adjust the bonding strength. On the other hand, Patent Document 2 describes a structure in which an aluminum alloy roof panel is joined on a steel side member outer panel via a resin layer. In addition, a technology is disclosed that uses a resin layer having a tensile shear strength of 2 MPa or less as the resin layer to reduce the thermal strain generated in the bonding portion during heating in the manufacturing process of the vehicle.

JP, 2013-208861, A JP, 2004-130986, A

  However, in the technology disclosed in Patent Document 1, the linear expansion difference (the difference between the linear expansion of the frame member and the linear expansion of the FRP plate) when heated in the manufacturing process of the vehicle or the like is not taken into consideration. For this reason, thermal strain may occur in the joint between the frame member and the FRP plate due to the difference in linear expansion. On the other hand, in the technique disclosed in Patent Document 2, since only the tensile shear strength of the resin layer is set, when the difference in linear expansion between the steel side member outer panel and the roof panel is large, the adhesive may be peeled off. is there.

  In the present invention, in consideration of the above fact, in a structure in which a metal member and a resin member are joined by an adhesive, the heat distortion due to the difference in linear expansion between the metal member and the resin member is suppressed, and the metal member and the resin member are heated. It is an object of the present invention to provide a joining structure for a vehicle member and a joining method for a vehicle member, which can maintain a good joining state with the above.

The joint structure for a vehicle member according to the present invention according to the first aspect of the present invention includes a metal member constituting the vehicle member, a resin member joined to the metal member, and the metal member and the resin member. And a bonding agent having a lower modulus of elasticity than the metal member and the resin member, and a first through hole is formed in the metal member; A second through hole is formed coaxially with the first through hole, and a fastening member for fastening the metal member and the resin member is inserted through the first through hole and the second through hole, A gap between the first through hole and the fastening member is smaller than a linear expansion difference between the metal member and the resin member, and is smaller in diameter than the second through hole, and the second through hole is formed. In the hole, the gap with the fastening member is formed larger than the linear expansion difference It has been.

  In the joint structure of vehicle members according to the present invention as set forth in claim 1, an adhesive is provided between the metal member and the resin member, and both are joined by the adhesive. Here, since the modulus of elasticity of the adhesive is lower than the modulus of elasticity of the metal member and the modulus of elasticity of the resin member, when the metal member and the resin member are heated, depending on the difference in linear expansion between the metal member and the resin member. The adhesive is elastically deformed, and the thermal strain due to the linear expansion difference can be suppressed.

  Further, at the time of heating in the drying step after coating, the adhesive extends in accordance with the relative displacement between the metal member and the resin member so as to satisfy the above relational expression. For this reason, when the metal member and the resin member are heated, the adhesive extends in accordance with the relative displacement due to the difference in linear expansion between the metal member and the resin member. Thereby, it is possible to suppress peeling of the adhesive at the time of heating, and the bonding state of the metal member and the resin member at the time of heating can be favorably maintained.

  Furthermore, the metal member and the resin member are joined by an adhesive and fastened by a fastening member. Thereby, compared with the structure which joined the metal member and the resin member only by the adhesive agent, joint strength can be improved.

  Furthermore, the clearance between at least one of the first through hole and the second through hole and the fastening member is larger than the linear expansion difference.

  Therefore, even when the metal member and the resin member are relatively displaced due to the difference in linear expansion during heating, the clearance between the first through hole and the fastening member or the clearance between the second through hole and the fastening member is a relief portion Become. As a result, thermal strain can be suppressed.

  The joint structure for a vehicle member according to the present invention as set forth in claim 2 is the invention according to claim 1, wherein the fastening member is a shaft portion inserted through the metal member and the resin member, and the shaft portion A first head extending along the resin member from one end to lock the resin member, and extending from the other end of the shaft along the metal member to engage the metal member And the second head to be stopped, the metal viewed from the axial direction of the fastening member rather than the area of the area where the resin member and the first head overlap when viewed from the axial direction of the fastening member The area of the region where the member and the second head overlap is larger.

  In the joint structure for a vehicle member according to the present invention, the contact area between the metal member and the second head is larger than the contact area between the resin member and the first head. Here, since the fastening force of the fastening member depends on the contact area with the metal member, the fastening force of the fastening member can be improved by increasing the contact area between the metal member and the second head.

  According to a third aspect of the present invention, there is provided a joint structure for a vehicle member according to the third aspect of the present invention, in the second aspect, between the shaft portion and the metal member and between the shaft portion and the resin member And the adhesive is provided.

  In the joint structure for a vehicle member according to the present invention as set forth in claim 3, the metal member and the resin member contact the fastening member by interposing the adhesive between the metal member and the resin member and the fastening member. Can be suppressed. As a result, even when the fastening member is formed of metal, electrolytic corrosion of the metal member and the resin member can be suppressed.

In the method for joining vehicle members according to the present invention as set forth in claim 4, the elastic modulus of at least one of the metal member and the resin member is lower than that of the metal member and the resin member, and An adhesive applying step of applying an adhesive which extends in accordance with a relative displacement due to a difference in linear expansion between the metal member and the resin member at the time of heating, a first through hole formed in the metal member and the resin member A joining step of overlapping and joining the metal member and the resin member with the adhesive in a state in which the second through hole is opposed, and a fastening member in the first through hole and the second through hole inserted to have a, a fastening step of fastening the said resin member and the metal member, the first through-hole, than the linear expansion difference gap between the metal member and the resin member and said fastening member Small and said Is formed smaller in diameter than the through hole, the second through-hole, a gap between the fastening member is larger to form than the linear expansion difference.

  In the method for joining vehicle members according to the present invention, the adhesive is applied to at least one of the metal member and the resin member in the adhesive application step. Further, in the bonding step, the metal member and the resin member are bonded by an adhesive. Furthermore, in the fastening step, the fastening member is inserted into the first through hole and the second through hole to fasten the metal member and the resin member. Here, as the adhesive, an adhesive which has an elastic modulus lower than that of the metal member and the resin member, and which extends in accordance with the relative displacement caused by the difference in linear expansion between the metal member and the resin member during heating in the drying step after coating By using, the thermal distortion by the linear expansion difference of a metal member and a resin member can be suppressed. In addition, when the metal member and the resin member are heated, the adhesive is extended according to the relative displacement due to the difference in linear expansion between the metal member and the resin member, so that peeling of the adhesive can be suppressed at the time of heating. .

  As described above, according to the joint structure of vehicle members according to claim 1, in the structure in which the metal member and the resin member are joined by the adhesive, the heat due to the difference in linear expansion between the metal member and the resin member It has the outstanding effect that the joining state of a metallic member and a resin member can be maintained satisfactorily at the time of heating, controlling distortion.

  Moreover, it has the outstanding effect that the joint strength of a metallic member and a resin member can be improved, controlling heat distortion.

  According to the joint structure of the vehicle member of the second aspect, there is an excellent effect that the fastening force by the fastening member can be improved.

  According to the joint structure of the member for vehicles of a 3rd mode, it has the outstanding effect that electrolytic corrosion of a metallic member and a resin member can be controlled.

  According to the method of bonding vehicle members as set forth in claim 4, while the thermal strain due to the linear expansion difference between the metal member and the resin member is suppressed, the bonding state between the metal member and the resin member is well maintained at the time of heating. It has the excellent effect of being able to

It is a perspective view showing the member for vehicles concerning an embodiment. It is sectional drawing which expands and shows the state cut | disconnected by 2-2 line of FIG. It is sectional drawing which expands and shows the state cut | disconnected by line 3-3 in FIG. It is the figure which looked at the rivet in FIG. 3 from the axial direction, (A) shows the figure seen from the Rockinna side, (B) shows the figure seen from the resin panel side. It is a figure which shows the vibration model in which the metal member and the resin member were joined by the adhesive agent. It is a figure which shows the model for calculating the elongation rate calculated | required by an adhesive agent, (A) shows the state before a heating, (B) shows the state at the time of a heating. It is a figure corresponding to Drawing 3 which shows the 1st modification of the member for vehicles concerning an embodiment. It is a figure corresponding to Drawing 3 which shows the 2nd modification of the member for vehicles concerning an embodiment.

  Hereinafter, with reference to Drawing 1-Drawing 3, an embodiment of a joined structure of a member for vehicles concerning the present invention is described. In addition, arrow FR suitably shown by each figure has shown the vehicle front side in the vehicle with which the member for vehicles was assembled | attached, arrow UP has shown the vehicle upper side, and arrow OUT shows the vehicle width direction outer side. There is. Further, in the following description, when the front, rear, top, bottom, left, and right directions are used unless otherwise specified, the left, right, top, bottom, top, bottom, left, right when traveling in the vehicle vertical direction are indicated.

(Joint structure of vehicle members)
As shown in FIG. 1, the vehicle member according to the present embodiment includes a metal frame 10 as a metal member formed in a substantially rectangular frame shape in plan view, and a resin member assembled to the metal frame 10 from above the vehicle And the resin panel 12 as it is comprised. The metal frame 10 is a member constituting a member for a vehicle, and includes a pair of left and right rockers 14 extended in the vehicle longitudinal direction, and a cross member inner 16 connecting the rockers 14 in the vehicle width direction.

  The rocker 11 is a metal member, and is located between the panel mounting portion 22 having a substantially L-shaped cross section located at the upper portion, the inclined portion 18 located at the lower portion, and the panel mounting portion 22 and the inclined portion 18. And a vertical wall portion 20 connecting the two.

  The inclined portion 18 is inclined outward in the vehicle width direction as it goes downward from above. Further, a lower flange portion 18A is extended from the lower end portion of the inclined portion 18 downward in the vehicle. The lower flange portion 18A extends downward from the vehicle except for the front end portion and the rear end portion of the inclined portion 18, and is joined to a rocker outer (not shown).

  A vertical wall portion 20 is provided at the upper end portion of the inclined portion 18. The vertical wall portion 20 has a length in the vehicle longitudinal direction substantially equal to that of the upper end portion of the inclined portion 18, and extends from the inclined portion 18 toward the vehicle upper side. Further, the vertical wall 20 of one locker 14 and the vertical wall 20 of the other locker 14 are substantially parallel.

  At the upper end of the vertical wall portion 20, a panel mounting portion 22 is provided. The panel mounting portion 22 includes a horizontal portion 22A extended outward in the vehicle width direction from the upper end portion of the vertical wall portion 20, and an upper flange portion of the horizontal portion 22A in the vehicle width direction extends upward from the vehicle 22B has been extended. Then, the upper flange portion 22B is joined to a rocker outer (not shown).

  The rocker 11 is configured as described above, and is formed in a substantially hat shape whose cross-sectional shape as viewed from the front side of the vehicle is opened outward in the vehicle width direction. Further, a rocker outer (not shown) having a substantially hat-shaped cross section, which is opened inward in the vehicle width direction, is joined to the outside in the vehicle width direction of the rocker 14. Specifically, the upper flange portion 22B and the lower flange portion 18A of the rocker 11 are joined to the upper flange and the lower flange of the rocker outer, so that a rocker having a closed cross section is constructed.

  Here, the pair of left and right rockers 14 are disposed substantially in parallel, and the front end portions of the rockers 14 are connected by the cross member inner 16. The rear end portions of the locker 14 are also connected by the same cross member inner 16. In the following description, the front cross member inner 16 will be described in detail, but the rear cross member inner 16 has a similar configuration.

  The cross member inner 16 connecting the front ends of the locker 14 is a metal member. Further, the cross member inner 16 is positioned between the panel mounting portion 28 having a substantially L-shaped cross section located at the upper portion, the inclined portion 24 located at the lower portion, and the panel mounting portion 28 and the inclined portion 24 It is comprised including the vertical wall part 26 to connect.

  The inclined portion 24 is inclined toward the vehicle front side as it goes downward from above. Further, a lower flange portion 24A extends from the lower end portion of the inclined portion 24 to the lower side of the vehicle. The lower flange portion 24A extends downward from the vehicle except for the front end portion and the rear end portion of the inclined portion 24, and is joined to a cross member outer (not shown).

  A vertical wall portion 26 is provided at the upper end portion of the inclined portion 24. The vertical wall portion 26 is formed in substantially the same length as the upper end portion of the inclined portion 24 in the vehicle width direction, and extends from the inclined portion 24 to the vehicle upper side. Further, the vertical wall portion 26 of one cross member inner 16 and the vertical wall portion 26 of the other cross member inner 16 are substantially parallel.

  A panel mounting portion 28 is provided at the upper end of the vertical wall portion 26. The panel mounting portion 28 includes a horizontal portion 28A extended from the upper end portion of the vertical wall portion 26 to the vehicle front side, and the upper flange portion 28B extends from the end portion on the vehicle front side of the horizontal portion 28A to the vehicle upper side. It has been extended. The upper flange portion 28B is joined to a rocker outer (not shown).

  The cross member inner 16 is configured as described above, and has a cross-sectional shape as viewed from the front side of the vehicle that is substantially in the shape of a hat opened to the front side of the vehicle. Further, on the vehicle front side of the cross member inner 16, a cross member outer (not shown) having a substantially hat-shaped cross section opened to the rear side of the vehicle is joined. Specifically, the upper flange portion 28B and the lower flange portion 24A of the cross member inner 16 are joined to the upper flange and the lower flange of the cross member outer, so that a cross member having a closed cross section is configured.

  Further, the end on the vehicle right side of the cross member inner 16 is joined with the rocker 11 disposed on the right side of the vehicle by welding or the like, and the end on the vehicle left side of the cross member inner 16 is on the left of the vehicle. It is joined with 14 by welding etc.

  The cross member inner 16 connecting the rear end portions of the locker 14 is formed in a substantially hat shape with the rear side of the vehicle open, and is joined to the pair of left and right locker 14 by welding or the like. Thus, the frame-shaped metal frame 10 is configured.

  Here, the panel mounting portion 22 of the rocker 11 and the panel mounting portion 28 of the cross member inner 16 are integrally formed in a frame shape. The horizontal portion 22A of the panel mounting portion 22 and the horizontal portion 28A of the panel mounting portion 28 form a continuous plane, and the adhesive 30 is applied on the flat surface. Details of the adhesive 30 will be described later.

  Through holes (first through holes) 28C are formed in the horizontal portion 22A and the horizontal portion 28A. The through holes 28C are respectively formed at the four corners of this surface and the middle portions of the four sides when the horizontal portion 22A and the horizontal portion 28A are regarded as a continuous rectangular frame-like surface. For this reason, eight through holes 28C are formed in the horizontal portion 22A and the horizontal portion 28A (only two through holes 28C on diagonal lines are illustrated in FIG. 1).

  Here, the resin panel 12 is joined from the vehicle upper side of the metal frame 10. The resin panel 12 is formed of a resin, and in the present embodiment, is formed of CFRP (carbon fiber reinforced resin composite material) as an example. The resin panel 12 is formed in a substantially rectangular plate shape in a plan view.

  Furthermore, at the four corners of the resin panel 12, through holes (second through holes) 12A penetrating in the plate thickness direction are formed. Further, through holes 12A are also formed in the middle portions of the four sides of the resin panel 12, respectively. For this reason, eight through holes 12A are formed in the resin panel 12. Then, the resin panel 12 is joined to the horizontal portion 22A and the horizontal portion 28A via the adhesive 30. Further, a rivet 32 as a fastening member is inserted through the through hole 28C formed in the horizontal portion 22A and the horizontal portion 28A and the through hole 12A formed in the resin panel 12, and both rivets 32 mechanically It is concluded. Details of the rivet 32 will be described later.

  FIG. 2 shows an enlarged cross-sectional view of the joint portion between the resin panel 12 and the rocker 11. And the structure of the junction part of this resin panel 12 and Rockinna 14 is explained below. In addition, since the junction part of the resin panel 12 and the cross member inner 16 is made into the structure similar to FIG. 2, description is abbreviate | omitted.

  The adhesive 30 is provided between the panel mounting portion 22 of the locker 14 and the resin panel 12 to join them. The adhesive 30 is continuously provided in a region from the outer peripheral end of the resin panel 12 to the rear end of the horizontal portion 22A, and is in surface contact with the panel mounting portion 22 and the resin panel 12.

  Here, the outer peripheral end of the resin panel 12 is covered by the sealer 34. The sealer 34 is provided continuously along the outer peripheral end of the resin panel 12. This prevents the infiltration of water from between the resin panel 12 and the panel mounting portion 22. In this manner, electrolytic corrosion due to the corrosion potential difference between the resin panel 12 and the panel mounting portion 22 is prevented. Further, similarly, the electrolytic corrosion due to the corrosion potential difference between the resin panel 12 and the panel mounting portion 28 of the cross member inner 16 is prevented.

  Here, in the present embodiment, an epoxy-based one-component heat-curable adhesive is used as the adhesive 30. The curing conditions are set at a temperature of 170 ° C. and a time of 20 minutes. Furthermore, an adhesive whose shear strength is set to 1 to 5 MPa is used. In addition, it is not limited to this, You may use another adhesive. For example, a urethane-based or elastomer-based adhesive may be used, or a modified silicone-based adhesive may be used. The curing type may be a two-component heat curing type or a room temperature curing type, or a moisture curing type. Furthermore, the curing conditions may be changed by an adhesive. For example, in the case of a room temperature curing type, the temperature may be set to 20 ° C. and the time may be set to one day.

  Also, the adhesive 30 has a lower elastic modulus than the lockiner 14 and the resin panel 12, and the relative displacement caused by the difference in linear expansion between the lockiner 14 (metal frame 10) and the resin panel 12 when heated in the drying step after painting. It has the characteristic of extending according to the Therefore, even when the resin panel 12 and the horizontal portion 22A are relatively displaced due to the difference in linear expansion when heated to a predetermined temperature (for example, 150 ° C. to 200 ° C.) in the drying step after coating, The adhesive 30 is configured to be able to suppress thermal distortion by elastically deforming and extending. In the present embodiment, although the elastic modulus is set to 100 MPa, the present invention is not limited to this, and an adhesive having a lower elastic modulus may be used, and an adhesive having an elastic modulus of 1 MPa may be used. Moreover, in this embodiment, although the thing whose heat-resistant temperature is 215 degreeC or more is used as the adhesive agent 30, it is not limited to this, If it is higher than the temperature of the drying furnace after painting, the heat-resistant temperature is higher than 215 degreeC. Low adhesives may be used.

Here, the preferable conditions of the adhesive agent 30 which can suppress heat distortion are considered. First, the elastic modulus of the adhesive 30 will be considered based on the vibration model shown in FIG. Incidentally, each of the K _M and X _M in the figure, the displacement amount at the time of heating of the spring constant (elastic modulus) and the metal member of the metal member. Further, K _A and X _A in the figure are the spring constant (elastic modulus) of the adhesive and the displacement of the adhesive upon heating, respectively. Furthermore, K _P and X _P in the figure are respectively a spring constant (elastic modulus) of the resin member and a displacement amount at the time of heating of the resin member.

  Assuming that the force acting at the time of heating is F, and the linear expansion difference is ΔL, F and ΔL are expressed as the following equation (1) and equation (2) using the parameters described above.

... (1)

... (2)

  Substituting the equation (1) into the equation (2) gives the following equation (3).

... (3)

Here, in order to absorb the linear expansion difference ΔL by the adhesive, it is preferable to satisfy ΔL ≒ X _A. That is, from the above equation (3),


In this case, it is understood that the adhesive can be elastically deformed to absorb the linear expansion difference ΔL effectively. That is, the spring constant K _A of the adhesive is preferably extremely smaller than the spring constant K _M of the metal member and the spring constant K _{P of the} resin member. In other words, it is preferable to make the elastic modulus of the adhesive extremely lower than the elastic modulus of the metal member and the elastic modulus of the resin member. In the adhesive 30 according to the present embodiment, the elastic modulus of the metal frame 10 is an example. And with respect to the elastic modulus of the resin panel 12, it is set as the elastic modulus (100 Mpa) of 1/1000 or less.

  Next, the elongation required for the adhesive will be considered with reference to the model shown in FIG. Here, FIG. 6 shows a state before and after heating of a model diagram in which the metal plate 102 and the resin plate 100 are joined by the adhesive 104. Further, the heating temperature is not particularly limited, but in this embodiment, a temperature (for example, 180 ° C.) in a drying process after painting of a vehicle is assumed. In addition, the thickness of the adhesive agent 104 is exaggerated and drawn for convenience of explanation.

As shown in FIG. 6A, in the state before heating, the end face of the metal plate 102 and one end face of the adhesive 104 are continuous, and the end face of the resin plate 100 and the other end face of the adhesive 104 are It is continuous. In addition, the thickness of the adhesive 104 is T ₀ .

  As shown in FIG. 6B, during heating, the metal plate 102 and the resin plate 100 are relatively displaced by ΔL in the direction orthogonal to the thickness direction due to the difference in linear expansion between the metal plate 102 and the resin plate 100. Further, the adhesive 104 is elastically deformed and extended in accordance with the relative displacement of the metal plate 102 and the resin plate 100.

The thickness of the adhesive 104 (thickness in the direction perpendicular to the bonding surface) has the same T ₀ state before heating. Further, assuming that the length in the direction from the metal plate 102 to the resin plate 100 at the end face of the adhesive 100 is the end face length, the length of the end face of the adhesive 104 is T1. By this, the following equation (4) is established.

... (4)

  From the above equation (4), the elongation at heating required for the adhesive 104 is the following equation (5).

... (5)

From the above, it is preferable to use an adhesive having a modulus of elasticity satisfying ΔL ≒ X _A in the above equation (3). Moreover, the adhesive agent provided with the elongation rate which satisfy | fills the said Numerical formula (5) is used.

  Next, the rivet 32 will be described. As shown in FIG. 3, the through holes 12A formed in the resin panel 12 are formed coaxially with the through holes 28C formed in the panel mounting portion 22 of the rocker 14. That is, the through holes 12A and the through holes 28C are provided at positions facing each other in the vehicle vertical direction. Further, in the present embodiment, as an example, the through holes 12A and the through holes 28C are formed with substantially the same diameter. The rivet 32 is inserted through the through holes 12A and the through holes 28C.

  The rivet 32 is provided with a shaft 32B, a first head 32A, and a second head 32C in a state after fastening. The shaft portion 32B is formed in a substantially cylindrical shape whose axial direction is the vertical direction of the vehicle, and is inserted into the resin panel 12 and the horizontal portion 22A. The first head portion 32A is provided at the upper end of the shaft portion 32B, and is formed in a substantially truncated cone shape having a diameter larger than that of the shaft portion 32B and being flat. The lower surface of the peripheral end of the first head 32A is in contact with the upper surface of the resin panel 12, and the resin panel 12 is locked by the first head 32A.

  On the other hand, the second head 32C is provided at the lower end portion of the shaft portion 32B, and is formed in a substantially disc shape with a diameter larger than that of the shaft portion 32B. The second head 32C is larger in diameter than the first head 32A. The upper surface of the peripheral end of the second head 32C is in contact with the lower surface of the horizontal portion 22A, and the panel mounting portion 22 is locked by the second head 32C.

  Further, in the present embodiment, the gap between the through hole 12A formed in the resin panel 12 and the shaft portion 32B is substantially the same as the gap between the through hole 28C formed in the panel mounting portion 22 of the rocker 11 and the shaft portion 32B. It is formed in size. And these clearances are formed larger than the linear expansion difference of the resin panel 12 and the panel attachment part 22 (Lockaina 14).

  Furthermore, as shown in FIG. 4, in the region where the horizontal portion 22A of the panel mounting portion 22 and the second head 32C overlap with each other when viewed from the axial direction of the rivet 32 (the region of the hatched portion in FIG. The area S1 is larger than the area S2 of the area where the resin panel 12 and the first head 32A overlap with each other as viewed in the axial direction of the rivet 32 (the area of the hatched portion in FIG. 4B).

(Method of bonding vehicle parts)
Next, an example of the method for joining vehicle members according to the present embodiment will be described. First, as shown in FIG. 1, an adhesive 30 is applied to at least one of the metal frame 10 made of metal and the resin panel 12 (adhesive application step).

  Here, in the present embodiment, the adhesive 30 is applied to the metal frame 10 side. Specifically, the horizontal portion 22A of the panel mounting portion 22 to which the resin panel 12 is attached and the horizontal portion 28A of the panel mounting portion 28 An adhesive 30 is applied to the upper surface of the. The method for applying the adhesive 30 is not particularly limited. For example, a method of applying the adhesive 30 from a nozzle of a coating machine in which the adhesive 30 is accommodated, or a method of applying the adhesive 30 by a spray or the like may be adopted.

  Next, as shown in FIG. 3, in a state where the through holes 12A formed in the resin panel 12 and the through holes 28C formed in the metal frame 10 (the panel attachment portion 22 of the locker 14) are opposed, The frame 10 and the resin panel 12 are stacked and bonded by an adhesive 30 (bonding step).

  Finally, the rivet 32 is inserted into the through hole 12A and the through hole 28C from the upper side of the resin panel 12 to fasten the metal frame 10 and the resin panel 12 (fastening step). Here, in a state before the rivet 32 is inserted into the through hole 12A and the through hole 28C, as shown in FIG. 1, only the first head 32A is formed, and the second head 32C is formed. Not. Then, after the shaft portion 32B of the rivet 32 is inserted into the through hole 12A and the through hole 28C, the second head portion is crushed by crushing the lower end portion of the shaft portion 32B with the first head portion 32A pressed against the resin panel 12. 32C is formed.

(Action and effect)
Next, the operation and effects of the joint structure for vehicle members according to the present embodiment will be described.

  In the present embodiment, the elastic modulus of the adhesive 30 is lower than the elastic modulus of the metal frame 10 and the elastic modulus of the resin panel 12. As a result, considering the case where coating is performed in a state where the resin panel 12 is joined to the metal frame 10, the coating is transported to a drying step to heat the metal frame 10 and the resin panel 12 after coating. At this time, the metal frame 10 and the resin panel 12 are thermally expanded (linearly expanded) by being heated. And a linear expansion difference arises between the metal frame 10 and the resin panel 12 (panel attachment part 22). Here, since the adhesive 30 is extended according to the relative displacement between the resin panel 12 and the panel mounting portion 22 due to the difference in linear expansion, it is possible to suppress the peeling of the adhesive 30.

  Further, by setting the elastic modulus of the adhesive 30 to be lower than the elastic modulus of the metal frame 10 and the elastic modulus of the resin panel 12, even when the difference in linear expansion between the resin panel 12 and the metal frame 10 is large, adhesion The elastic deformation of the agent 30 can suppress the thermal strain due to the difference in linear expansion.

  Furthermore, in the present embodiment, the gap between the through hole 12A formed in the resin panel 12 and the shaft portion 32B is formed larger than the linear expansion difference between the metal frame 10 and the resin panel 12. Thereby, even when the metal frame 10 and the resin panel 12 are relatively displaced due to the linear expansion difference, the clearance between the through hole 12A and the shaft portion 32B becomes a relief portion, and thermal distortion can be suppressed. In the present embodiment, the gap between the through hole 28C formed in the panel mounting portion 22 of the rocker 11 and the shaft portion 32B is also formed larger than the linear expansion difference between the metal frame 10 and the resin panel 12 . Therefore, the relative displacement between the metal frame 10 and the resin panel 12 due to the difference in linear expansion can be effectively released.

  Further, in the present embodiment, since the metal frame 10 and the resin panel 12 are joined by the adhesive 30 and the rivet 32, the joint strength can be improved as compared with a configuration in which the metal frame 10 and the resin panel 12 are joined by the adhesive 30 alone. . In particular, in the present embodiment, as shown in FIG. 4, the second head 32C of the rivet 32 and the panel mounting portion 22 (metals) are more than the contact area S2 of the first head 32A of the rivet 32 and the resin panel 12 The contact area S1 with the frame 10) is larger. Here, since the fastening force of the rivet 32 depends on the contact area with the metal frame 10 made of metal, the fastening force by the rivet 32 can be improved by increasing the contact area S1.

  As mentioned above, although embodiment of this invention was described, of course in the range which does not deviate from the summary of this invention, it can implement in a various aspect. For example, in the present embodiment, as shown in FIG. 3, the adhesive 30 is not provided between the through hole 12A and the shaft 32B and between the through hole 28C and the shaft 32B. It is not limited. For example, as in the first modified example shown in FIG. 7, the adhesive 30 may be applied to the wall of the through holes 12A and the through holes 28C.

  As shown in FIG. 7, in the present modification, the adhesive 30A is applied to the hole wall of the through hole 28C formed in the horizontal portion 22A of the panel mounting portion 22. The adhesive 30A is similarly applied to the hole wall of the through hole 12A formed in the resin panel 12. The adhesive 30A is integrated with the adhesive 30 provided between the panel mounting portion 22 and the resin panel 12. The other configuration is the same as that shown in FIG.

  According to this modification, the adhesive 30 intervenes between the shaft portion 32B of the rivet 32 and the panel mounting portion 22 and between the shaft portion 32B and the resin panel 12 so that the panel mounting portion 22 and the resin panel The contact of the rivet 12 with the rivet 12 can be suppressed. As a result, even when the rivets 32 are formed of metal, electrolytic corrosion of the panel mounting portion 22 and the resin panel 12 can be suppressed. Although the adhesive 30A is applied to the hole wall of the through hole 28C and the hole wall of the through hole 12A in the present modification, the present invention is not limited to this, and the adhesive is applied to the outer peripheral surface of the shaft portion 32B of the rivet 32. Even the same effect can be obtained.

  Further, in the present embodiment, as shown in FIG. 3, the through holes 28C formed in the panel mounting portion 22 and the through holes 12A formed in the resin panel 12 are formed to have substantially the same diameter. It is not limited to. For example, as in the second modified example shown in FIG. 8, the through holes 28C and the through holes 12A may be formed with different diameters.

  As shown in FIG. 8, in the present modification, a through hole 28 </ b> C is formed in the panel attachment portion 22. Further, through holes 12A are formed in the resin panel 12 coaxially with the through holes 28C.

  Here, the through holes 28 </ b> C of the panel mounting portion 22 have a smaller diameter than the through holes 12 </ b> A of the resin panel 12. Further, in the present modification, the gap between the hole wall of the through hole 28C and the shaft portion 32B of the rivet 32 is formed smaller than the linear expansion difference between the panel mounting portion 22 and the resin panel 12. Further, the gap between the hole wall of the through hole 12A and the shaft portion 32B of the rivet 32 is formed larger than the linear expansion difference between the panel mounting portion 22 and the resin panel 12. The other configuration is the same as that shown in FIG.

  According to this modification, the contact area between the second head 32C of the rivet 32 and the panel mounting portion 22 is increased by reducing the gap between the hole wall of the through hole 28C and the shaft 32B of the rivet 32. The fastening force of the rivet 32 can be improved.

  Further, since the gap between the hole wall of through hole 12A and shaft portion 32B of rivet 32 is formed larger than the linear expansion difference between panel mounting portion 22 and resin panel 12, through hole 12A and shaft portion 32B at the time of heating The gap between the two is a relief. As a result, the relative displacement due to the difference in linear expansion between the panel mounting portion 22 and the resin panel 12 can be absorbed, and thermal distortion can be suppressed.

  Moreover, in this embodiment, although the heating temperature in the drying process after painting is assumed, it is not limited to this, and the case where it heats at the temperature higher than the heating temperature in a drying process is assumed. Elastic modulus and elongation may be designed.

  Furthermore, in the present embodiment, the bonding structure between the metal frame 10 and the resin panel 12 has been described. However, the present invention is not limited to this, and the present invention may be applied to a bonding structure between another metal member and a resin member. For example, the present invention may be applied to a pillar, a stack frame or the like, and in particular, it can be applied to a junction structure in which a difference in linear expansion between a metal member and a resin member is concerned when heating in a drying step after painting.

  Moreover, although the rivet 32 was used as a fastening member in this embodiment, it is not limited to this, You may use another fastening member. For example, bolts and nuts may be used. In this case, the head of the bolt corresponds to the first head of the present invention, and the nut screwed into the bolt corresponds to the second head.

10 Metal frame (metal member)
12 Resin panel (resin member)
12A through hole (second through hole)
28C through hole (first through hole)
30 adhesive 30A adhesive 32 rivet (fastening member)
32A first head 32B shaft portion 32C second head 100 resin plate (resin member)
102 Metal plate (metal member)
104 Adhesive S1 area (area of area where metal member and second head overlap)
S2 area (area of area where resin member and first head overlap)

Claims (4)

A metal member that constitutes a vehicle member;
A resin member joined to the metal member;
An adhesive which is provided between the metal member and the resin member to join them and has a lower elastic modulus than the metal member and the resin member,
Have
A first through hole is formed in the metal member, and a second through hole is formed in the resin member coaxially with the first through hole.
A fastening member for fastening the metal member and the resin member is inserted into the first through hole and the second through hole,
A gap between the first through hole and the fastening member is smaller than a linear expansion difference between the metal member and the resin member, and the diameter of the first through hole is smaller than that of the second through hole.
The joint structure of a member for vehicles in which a crevice between the 2nd penetration hole and the fastening member is formed larger than the difference in linear expansion . The fastening member includes: a shaft portion inserted into the metal member and the resin member; and a first head portion extending from the one end of the shaft portion along the resin member to lock the resin member. A second head extending along the metal member from the other end of the shaft and locking the metal member;
More than the area of the area where the resin member and the first head overlap when viewed in the axial direction of the fastening member, the area where the metal member and the second head overlap when viewed from the axial direction of the fastening member The joint structure of the member for vehicles according to claim 1 whose area is larger.   The joint structure for vehicle members according to claim 2, wherein the adhesive is provided between the shaft portion and the metal member and between the shaft portion and the resin member. In at least one of a metal member and a resin member, the elastic modulus is lower than that of the metal member and the resin member, and at the time of heating in a drying step after coating, relative displacement due to difference in linear expansion between the metal member and the resin member An adhesive applying step of applying an adhesive extending accordingly;
In a state in which the first through hole formed in the metal member and the second through hole formed in the resin member are opposed to each other, bonding is performed so that the metal member and the resin member are overlapped and joined by the adhesive. Process,
A fastening step of inserting a fastening member into the first through hole and the second through hole to fasten the metal member and the resin member;
Have
The first through hole is formed such that a gap with the fastening member is smaller than a linear expansion difference between the metal member and the resin member and smaller in diameter than the second through hole,
A method of joining a member for a vehicle, wherein a gap between the second through hole and the fastening member is formed larger than the linear expansion difference .