JP2011162021A - Member joining structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress galvanic corrosion by reliably avoiding any contact of members with each other while reducing cost by dispensing with any cation electrodeposition coating of the joining pretreatment when joining the members formed by forming metals different from each other. <P>SOLUTION: In the member joining structure in which an inner panel 4 and an outer panel 5 formed of metals different from each other are joined with each other, a spacer member 20 formed in a predetermined shape is interposed between the inner panel 4 and the outer panel 5. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a joining structure for joining a plurality of members formed by molding different metals, and particularly belongs to the technical field of a structure for suppressing electrolytic corrosion.

  In general, two members formed by molding different metals are joined (for example, see Patent Documents 1 and 2). Patent Document 1 discloses a vehicle door. The outer panel of the door is formed of aluminum, and the inner panel is formed of a steel plate, which are joined to form a door. On the other hand, Patent Document 2 discloses a vehicle roof. The roof panel is formed of aluminum, and the roof side panel is formed of a steel plate, which are joined to form a roof.

  In the structures disclosed in Patent Documents 1 and 2, electrolytic corrosion becomes a problem. In other words, if rainwater or the like adheres to the contact area between aluminum and iron, a local battery is constructed with aluminum at a lower potential than iron as a positive electrode and iron at a higher potential as a negative electrode, and the positive side aluminum is ionized. And corrodes.

  In order to suppress this electrolytic corrosion, in Patent Document 1, a liquid adhesive is filled between two members. In Patent Document 2, a liquid sealing material is filled between two members.

  In addition, as a method of suppressing electrolytic corrosion, it is possible to prevent different metals from contacting each other by applying cationic electrodeposition coating as a pre-bonding treatment to one member and joining the other member. Yes.

JP 2009-35178 A JP 2007-23841 A

  However, when a liquid adhesive or the like is filled between two members as in Patent Documents 1 and 2, since the adhesive has fluidity, the adhesive is used when the two members are joined. Or the like is pushed away from between the two members and escapes, and as a result, the two members may come into contact with each other. When both members are in contact, the possibility of causing electrolytic corrosion increases as described above.

  Thus, it is conceivable to apply a cationic electrodeposition coating as a pre-bonding treatment to one of the members. However, in this case, the cost is significantly increased.

  The present invention has been made in view of the above points, and the object of the present invention is to eliminate the need for cationic electrodeposition coating as a pre-bonding treatment when joining members formed of different metals. While aiming at cost reduction, it is in preventing contact between members reliably and suppressing electrolytic corrosion.

  In order to achieve the above object, in the present invention, a preformed spacer member is interposed between members to be joined.

  According to a first aspect of the present invention, there is provided a joining structure for joining a first member and a second member formed by molding different metals, and a predetermined shape is previously provided between the first member and the second member. A spacer member that is molded and suppresses electrolytic corrosion is interposed.

  According to this configuration, the first member and the second member are joined and integrated with the spacer member interposed. The spacer member is molded in a predetermined shape in advance and has no fluidity like the adhesive of the conventional example, so that it does not escape from between the first member and the second member at the time of joining. Is avoided. This eliminates the need for cationic electrodeposition coating as a pre-bonding treatment.

  A second invention is characterized in that, in the first invention, the spacer member is formed of the same type of metal as the first member or the second member, and is subjected to electrolytic corrosion suppression treatment. .

  According to this configuration, for example, when the first member or the second member is baked after the first member and the second member are joined, the spacer member is prevented from being deteriorated or damaged by heat. It becomes possible to do.

  According to a third invention, in the first invention, the spacer member is formed by molding a resin material.

  According to this configuration, the spacer member can be easily deformed so as to correspond to the shape of the first member or the second member.

  According to a fourth invention, in any one of the first to third inventions, the spacer member is configured to sandwich the first member.

  According to this configuration, the spacer member is attached to the first member, and thereafter, the first member and the second member can be joined. During this joining, the spacer member is prevented from being displaced.

  According to a fifth invention, in any one of the first to fourth inventions, a slit is formed in the spacer member.

  According to this structure, since the rigidity of a spacer member falls by formation of a slit, a spacer member becomes easy to deform | transform. Thereby, the spacer member can be easily deformed so as to correspond to the shape of the first member or the second member.

  In a sixth aspect based on any one of the first to fifth aspects, the first member is an inner panel of the vehicle door, the second member is an outer panel of the vehicle door, and the periphery of the inner panel. The portion is hemmed to the outer panel, and the spacer member is disposed at the peripheral edge of the inner panel.

  According to this configuration, when the vehicle door is manufactured by hemming and joining the peripheral portion of the inner panel to the outer panel, the spacer member can be held by the outer panel together with the peripheral portion of the inner panel.

  According to the first aspect of the invention, since the spacer member formed in advance in a predetermined shape is interposed between the first member and the second member, it is possible to reliably avoid contact between both members and suppress electrolytic corrosion. . Moreover, since the cationic electrodeposition coating for the pre-bonding treatment is not required, the cost can be reduced.

  According to the second invention, since the spacer member is formed of the same type of metal as the first member or the second member, for example, when baking coating is applied, deterioration and damage of the spacer member are avoided and the expected electric power is supplied. A food suppression effect can be obtained.

  According to the third invention, by molding the spacer member with the resin material, the spacer member can be easily deformed so as to correspond to the shape of the first member or the second member, and workability at the time of joining is increased. Will improve.

  According to the fourth invention, since the first member and the second member can be joined with the spacer member attached to the first member, the spacer member is prevented from being displaced before and during joining. It can arrange | position in the site | part as aimed, and can fully acquire the expected electric corrosion suppression effect.

  According to the fifth invention, since the slit is formed in the spacer member, the spacer member can be easily deformed so as to correspond to the shape of the first member or the second member, and workability at the time of joining is improved. .

  According to the sixth aspect of the invention, when the inner panel and the outer panel of the vehicle door are hemmed and joined, the spacer member can be sandwiched by the outer panel together with the peripheral edge of the inner panel, thereby preventing the spacer member from being displaced. In this way, it is possible to obtain the expected electric corrosion suppression effect.

It is the figure which looked at the door for vehicles concerning an embodiment from the room inner side. It is the II-II sectional view taken on the line of FIG. It is a perspective view of a spacer member. It is a top view of a spacer member. It is an end view of a spacer member. FIG. 5 is a view corresponding to FIG. 4 in a state where the spacer member is bent in a direction in which the slit becomes narrower. FIG. 5 is a view corresponding to FIG. 4 in a state where the spacer member is bent in a direction in which the slit becomes wider. It is the figure which looked at the spacer member bent in the thickness direction from the bending part side. It is a figure explaining the point which attaches a spacer member to an inner panel. FIG. 3 is a view corresponding to FIG. 2 before hemming. FIG. 3 is a view corresponding to FIG. 2 according to Modification 1; FIG. 6 is a view corresponding to FIG. 5 according to Modification 2. FIG. 10 is a view corresponding to FIG. 3 according to Modification 3.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  FIG. 1 shows a vehicle door 1 to which a joining structure of members according to the present invention is applied. The vehicle door 1 is disposed on a side portion of an automobile and includes a door main body portion 2 constituting a substantially lower half portion and a sash 3 constituting a substantially upper half portion.

  The door main body 2 includes an inner panel 4 that constitutes the vehicle interior side and an outer panel 5 that constitutes the vehicle exterior side. The inner panel 4 is formed by forming a steel plate. The outer panel 5 is formed by molding a plate made of an aluminum alloy. On the center side of the inner panel 4, a bulging portion 4a is formed so as to bulge into the vehicle interior. As shown in FIG. 2, a space 10 is formed between the bulging portion 4 a and the outer panel 5. The space 10 accommodates window glass, a window glass lifting device, and the like. As shown in FIG. 1, openings 4b and 4b such as service holes are formed in the bulging portion 4a. Although not shown, the door 1 is provided with various reinforcing members.

  The vehicle front edge (the left edge in FIG. 1), the rear edge (the right edge in FIG. 1), and the lower edge of the inner panel 4 are joined to the outer panel 5 by a hemming joint 4c (in FIG. 2). Are also shown). The upper edge portion of the inner panel 4 is separated from the upper edge portion of the outer panel 5 toward the interior of the vehicle interior, and a wind glass at the time of raising and lowering passes between the upper edge portion of the inner panel 4 and the upper edge portion of the outer panel 5. A slit (not shown) is formed.

  The vehicle compartment side of the inner panel 4 is covered with a door trim (not shown).

  A to-be-processed part 5 a that is hemmed is provided on the front edge part, the rear edge part, and the lower edge part of the outer panel 5. As shown in FIG. 2, the processed portion 5a is bent (hemming) so that the cross section is U-shaped, and the inner panel is interposed between the processed portion 5a and the outer peripheral portion of the outer panel main body 5b. 4 to-be-joined parts 4c are located and clamped.

  A spacer member 20 is interposed between the sandwiched portion 4 c of the inner panel 4 and the outer panel 5. The spacer member 20 is for preventing electric corrosion by preventing the inner panel 4 and the outer panel 5 from contacting each other.

  As shown in FIGS. 3 to 5, the spacer member 20 is formed by bending a steel plate thinner than the inner panel 4 and the outer panel 5. The spacer member 20 is long in the longitudinal direction of the bonded portion 4c of the inner panel 4, and has a substantially U-shaped cross section so as to sandwich the bonded portion 4c in the thickness direction.

  The spacer member 20 includes a first plate portion 20a that contacts a vehicle outer surface (outer surface) of the bonded portion 4c of the inner panel 4, and a second plate portion 20b that contacts a vehicle interior side surface (inner surface) of the bonded portion 4c. And a bent portion 20c extending so as to connect the first plate portion 20a and the second plate portion 20b.

  As shown in FIG. 5, the second plate portion 20 b includes a proximal end portion 20 e and a distal end portion 20 f. The proximal end portion 20e is formed so as to approach the first plate portion 20a toward the distal end side. On the other hand, the tip portion 20f of the second plate portion 20b is formed so as to move away from the first plate portion 20a as it approaches the tip. Accordingly, the distal end portion of the proximal end portion 20e is closest to the first plate portion 20a. A separation dimension a between the distal end portion of the proximal end portion 20 e and the first plate portion 20 a is set to be shorter than a plate thickness dimension b of the bonded portion 4 c of the inner panel 4. Moreover, the separation dimension c between the tips of the first plate part 20a and the second plate part 20b is set to be longer than the plate thickness dimension b of the joined part 4c.

  As shown in FIG. 2, the 1st board part 20a is formed so that the outer surface of the to-be-joined part 4c may be met. As shown in FIGS. 3 and 4, a plurality of first slits 20 d, 20 d,... Are formed in the first plate portion 20 a at intervals in the longitudinal direction of the spacer member 20. Each first slit 20d has a shape extending from an edge of the first plate portion 20a opposite to the bent portion 20c to the vicinity of the bent portion 20c, and is substantially U-shaped in plan view. Further, the second plate portion 20b is also formed with a second slit 20g having the same shape as the first slit 20d of the first plate portion 20a at a corresponding position.

  By forming the first slit 20d and the second slit 20g in the first plate portion 20a and the second plate portion 20b, the rigidity of the spacer member 20 is lowered. Moreover, since the spacer member 20 is made of a steel plate, it has elasticity.

  The steel plates constituting the spacer member 20 are subjected to cationic electrodeposition coating (electrolytic corrosion suppression treatment). Since the spacer member 20 is much smaller than the inner panel 4 and the outer panel 5, the cost of applying the cationic electrodeposition coating to the spacer member 20 is the same as that for the inner panel 4 and the outer panel 5 by the cation electrodeposition coating for the pre-bonding treatment. Low compared to applying.

  Next, the manufacturing procedure of the spacer member 20 will be described. First, a steel plate is punched to punch out a plate material constituting the spacer member 20. At this time, the first slit 20d and the second slit 20g are formed. Further, the length of the plate material is made longer than the length shown in FIG.

  The punched plate material is rolled by a roll forming machine and bent into a U shape to form the spacer member 20.

  Thereafter, a cationic electrodeposition coating is applied. Since the first slit 20d and the second slit 20g are formed at the time of coating, the paint easily reaches and adheres to the inner surfaces of the first plate portion 20a and the second plate portion 20b through the slits 20d and 20g. As a result, it is possible to perform coating with less unevenness as a whole.

  The spacer member 20 manufactured in this way is longer than the length shown in FIG. At the time of use, it cuts and uses so that it may become required length. That is, the spacer member 20 having a different length may be cut at the site of use without being separately manufactured, so that the cost is low.

  Next, the case where the inner panel 4 and the outer panel 5 are joined using the spacer member 20 configured as described above will be described. First, the spacer member 20 is attached to the inner panel 4.

  That is, as shown in FIG. 9, the open side of the spacer member 20 is opposed to the edge of the bonded portion 4 c of the inner panel 4. Then, the spacer member 20 is moved in the arrow direction so that the joined portion 4c is inserted between the first plate portion 20a and the second plate portion 20b of the spacer member 20. At this time, as shown in FIG. 5, the separation dimension c between the front end portion 20f of the second member 20b and the first plate part 20a is longer than the plate thickness dimension b of the joined part 4c. Can be smoothly inserted between the first plate portion 20a and the second plate portion 20b.

  When attaching the spacer member 20, since the first slit 20d and the second slit 20g are formed in the spacer member 20 and the overall rigidity is lowered, so as to correspond to the shape of the joined portion 4c, It can be easily deformed.

  For example, when the inner panel 4 is viewed from the side, the portion 4c to be joined located at the lower corner of the inner panel 4 has a portion extending in the vertical direction and a portion extending in the vehicle front-rear direction intersecting at a substantially right angle. . Moreover, the other joined part 4c of the inner panel 4 may have a shape that is loosely curved in a side view. When the spacer member 20 is attached to such a bent portion, if the bending angle is loose, for example, as shown in FIG. 6, the spacers are formed so that the widths of the first slit 20d and the second slit 20g are narrowed. The member 20 may be bent and plastically deformed. Further, according to the shape of the joined portion 4c, on the contrary, as shown in FIG. 7, it is possible to bend the spacer member 20 so that the widths of the first slit 20d and the second slit 20g are widened. is there. Furthermore, as shown in FIG. 8, the spacer member 20 can be easily bent in the thickness direction. Therefore, the spacer member 20 can be deformed into various shapes to correspond to the shape of the joined portion 4c. In addition, when the bending angle of the joined portion 4c is almost a right angle like the lower corner of the inner panel 4, the spacer member 20 may be cut to cope with it.

  The spacer member 20 is moved to the position shown in FIG. Then, since the separation dimension a (shown in FIG. 5) between the first plate portion 20a of the spacer member 20 and the distal end of the proximal portion 20e is shorter than the plate thickness dimension b of the bonded portion 4c, the spacer member 20 As a result, the spacer member 20 is elastically deformed by the elastic force, and the joined portion 4c is sandwiched. Therefore, the spacer member 20 does not fall off from the inner panel 4 when the inner panel 4 is transported, and the positional deviation does not occur.

  After attaching the spacer member 20, the inner panel 4 and the outer panel 5 are overlapped in the thickness direction. And the to-be-processed part 5a of the outer panel 5 is bend | folded with a hemming processing apparatus, and the to-be-joined part 4c of the inner panel 4 is clamped with the spacer member 20, as shown in FIG. Thereby, the inner panel 4 and the outer panel 5 are joined together with the spacer 20 interposed.

  At the time of hemming, the spacer member 20 is a member formed in advance, and has no fluidity such as the adhesive of the conventional example. Therefore, the spacer member 20 does not escape from between the inner panel 4 and the outer panel 5, and the inner panel 4 and the outer panel. It is possible to avoid contact with 5.

  The vehicle body color paint is baked on the inner panel 4 and the outer panel 5 joined as described above. At this time, the inner panel 4 and the outer panel 5 are heated to about 180 ° C., for example. However, since the spacer member 20 is made of a steel plate, the spacer member 20 is not deteriorated or damaged. Contact between 4 and the outer panel 5 is avoided.

  Since the spacer 20 is subjected to the cationic electrodeposition coating as described above, the electrolytic corrosion of the inner panel 4 and the outer panel 5 is suppressed.

  As described above, according to this embodiment, since the spacer member 20 previously formed in a predetermined shape is interposed between the inner panel 4 and the outer panel 5, the two panels 4 and 5 are reliably in contact with each other. By avoiding, electric corrosion can be suppressed. In addition, since the inner panel 4 and the outer panel 5 do not require cationic electrodeposition coating for pre-bonding, cost reduction can be achieved.

  In addition, since the spacer member 20 is formed of the same kind of metal as the material of the inner panel 4, even if baking coating is performed, deterioration and damage of the spacer member 20 can be avoided and an expected electrolytic corrosion suppression effect can be obtained. it can.

  In addition, since the inner panel 4 and the outer panel 5 can be joined with the spacer member 20 attached to the inner panel 4, the positional displacement of the spacer member 20 is prevented before joining and at the time of joining. It can arrange | position and can fully obtain the expected electric corrosion suppression effect.

  Further, since the first slit 20d and the second slit 20g are formed in the spacer member 20, the spacer member 20 can be easily deformed so as to correspond to the shape of the joined portion 4c of the inner panel 4, and at the time of joining Workability is improved.

  Moreover, since the spacer member 20 can be clamped by the outer panel 5 together with the joined portion 4c of the inner panel 4, the positional deviation of the spacer member 20 can be prevented.

  The spacer member 20 can also be formed using a metal material other than a steel plate.

  Further, as in Modification 1 shown in FIG. 11, an adhesive sealer 25 is applied between the inner panel 4 and the outer panel 5, and a sealer 26 is applied so as to cover the processed portion 5 a of the outer panel 5. May be. Adhesive sealer 25 is applied for the purpose of rust prevention and adhesion, and is applied before hemming. The sealer 26 is mainly for waterproofing purposes.

  Further, the spacer member 20 may be formed by molding a resin material. In this case, the resin material preferably has elasticity. Further, the resin material is preferably a heat-resistant material that can withstand the heat during baking coating, such as nylon. When the spacer 20 is made of a resin material, it is preferable to form the first slit 20d and the second slit 20g by punching after extrusion molding so as to have a U-shaped cross section.

  Further, as in Modification 2 shown in FIG. 12, the second plate portion 20b of the spacer member 20 may be formed substantially flat like the first plate portion 20a. In the second modification, the separation dimension c between the tip portions of the first plate portion 20a and the second plate portion 20b is set to be shorter than the plate thickness dimension b of the bonded portion 4c of the inner panel 4. Thereby, the to-be-joined part 4c of the inner panel 4 can be clamped by the spacer member 20.

  Further, the shape of the spacer member is not limited to the above-described shape, and may be, for example, a shape as in Modification 3 shown in FIG. That is, the spacer member 30 of the third modification is formed in a U-shaped cross section, and extends in the outer surface of the joined portion 4c of the inner panel 4 and a plurality of pieces connected to the plate portion 30a. 30b, 30b,... The piece portions 30b are arranged at substantially equal intervals in the longitudinal direction of the plate portion 30a.

  In the plate part 30a, a slit 30c is formed at a portion corresponding to the space between the adjacent piece parts 30b and 30b. Thereby, the spacer member 30 becomes a structure which deform | transforms easily like the said spacer member 20. FIG. Moreover, the piece part 30b is formed so that the inner surface of the to-be-joined part 4c of the inner panel 4 may be followed. Further, the tip of each piece 30b is formed in an arc shape.

  In the above embodiment, the spacer member 20 is provided only in the hemming portion. However, the spacer member 20 is not limited to this, and may be provided in a portion other than the hemming portion.

  Moreover, the material of the inner panel 4 and the outer panel 5 is not limited to the above-described combination, and the present invention can be applied to any combination of materials that can cause electrolytic corrosion.

  Moreover, in this embodiment, although the case where the spacer members 20 and 30 were provided between the inner panel 4 and the outer panel 5 was demonstrated, it is not restricted to this, For example, between a reinforcing member and the outer panel 5, a reinforcing member and an inner Spacer members 20 and 30 may be provided between the panel 4 and the panel 4. Further, when a plurality of members constituting a vehicle trunk lid, a back door, a slide door, a bonnet hood, a roof, or the like are joined, spacer members 20 and 30 can be interposed.

  Further, the present invention can be applied to the case of joining various members other than the case of joining the members constituting the vehicle.

  As described above, the member joining structure according to the present invention can be used, for example, when joining an inner panel and an outer panel of a vehicle door.

DESCRIPTION OF SYMBOLS 1 Vehicle door 2 Door main-body part 3 Sash 4 Inner panel (1st member)
5 Outer panel (second member)
20, 30 Spacer member 20d First slit 20g Second slit 30c Slit

Claims (6)

In the joining structure of the member that joins the first member and the second member formed by molding different metals,
A member joining structure characterized in that a spacer member that is molded in a predetermined shape and suppresses electrolytic corrosion is interposed between the first member and the second member. In the joining structure of the member of Claim 1,
The spacer member is formed by molding the same kind of metal as the first member or the second member, and is subjected to electrolytic corrosion suppression treatment. In the joining structure of the member of Claim 1,
The spacer member is formed by molding a resin material. In the joining structure of the member as described in any one of Claim 1 to 3,
The spacer member is configured to sandwich the first member. In the joining structure of the member as described in any one of Claim 1 to 4,
A member joining structure, wherein a slit is formed in the spacer member. In the joining structure of the member as described in any one of Claim 1 to 5,
The first member is an inner panel of a vehicle door,
The second member is an outer panel of a vehicle door,
The peripheral portion of the inner panel is hemmed to the outer panel,
The spacer member is disposed at a peripheral edge portion of the inner panel, and is a member joining structure.

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