JP4985114B2 - Adhesive bonding member and method for manufacturing the member - Google Patents

Description

  The present invention relates to an adhesive joint member in which the first and second adherend members are joined to each other by a chain-curing adhesive at the adherend joint portions respectively extended to the two adherend members, and the manufacture of the member It belongs to the technical field related to methods.

Conventionally, for example, as shown in Patent Document 1, when light or heat energy is applied, the energy application part undergoes a curing reaction to generate a curing reaction heat, and the curing reaction part is generated by the curing reaction heat. A chain-curing polymer that undergoes a chain-curing reaction by causing a curing reaction of a portion adjacent to the surface to generate a curing reaction heat is known. This chain-cured polymer contains, for example, an epoxy resin, a light / thermosetting initiator such as an aromatic sulfonium salt, and a thermosetting initiator such as a sulfonium salt. By continuously generating heat, the resin is subjected to a chain curing reaction. Patent Document 1 shows that the chain-cured polymer can be used as an adhesive.
JP-A-11-193322

  By the way, it is conceivable to use the chain-curing polymer as an adhesive so that the first and second adherends constituting the vehicle body of the vehicle are adhesively bonded to each other. That is, the first and second adherend members are each provided with an adhesion joining portion such as a flange portion, and a chain-curing polymer as an adhesive is provided between the adhesion joining portions of the two adherend members. A chain curing adhesive is disposed, light or heat energy is applied to a part of the chain curing adhesive, and the chain curing adhesive is subjected to a chain curing reaction, whereby the entire chain curing adhesive is cured. In this way, the time from the application of energy to the curing of the entire chain-curing adhesive can be shortened to about several tens of seconds and the bonding process can be shortened. It is not necessary to heat, and the equipment for joining can be simplified. In addition, by continuously joining the two adherent members, the rigidity of the adhesive joining member in which the two adherent members are joined to each other can be improved as compared to the case of spot joining. Accordingly, the vehicle body member can be thinned to reduce the weight.

  However, when the first and second adherends are bonded to each other by the chain-curing adhesive as described above, the chain-curing adhesive is applied to at least one of the adhering joints of the both adherends, so Assuming that there is a break in a portion of the chain-curing adhesive in the extending direction of the bonded joint when the bonded joints of the adhesive members are combined, the chain curing reaction stops halfway at the cut. The problem arises that the entire chain-curing adhesive cannot be cured. Further, even if there is no break in the chain-curing adhesive, there is a possibility that the curing reaction heat is lost to the adherent member or the clamp member that clamps the adherent member, and the chain-curing reaction stops midway. . In particular, when the gap between the bonded joints is small, the amount of chain-cured adhesive between the bonded joints is small, so that there is a break in a part of the chain-cured adhesive in the extending direction of the bonded joints. This is likely to occur, or much of the curing reaction heat is taken away by the adherend member or the clamp member. As a result, the possibility that the chain curing reaction stops in the middle is increased. When the chain curing reaction stops in the middle as described above, an unbonded portion is generated, and a desired adhesive strength cannot be obtained.

  The present invention has been made in view of such points, and the object of the present invention is to use the chain-curing adhesive when the first and second adherends are joined to each other by the chain-curing adhesive. It is to ensure that the entire chain curing adhesive is cured by preventing the chain curing reaction from stopping midway.

In order to achieve the above-mentioned object, in the present invention, it extends continuously along the extending direction of the adherend joint portion in the vicinity of the adherend joint portion of at least one of the two adherent members. A concave portion is formed, and a first chain-curing adhesive is continuously provided along the extending direction of the adherend joining portion between the adherend joining portions of the two adherend members. a second chain curing adhesive different from the first chain curing adhesive, the deposition of the first contact to the adherend junction entire extension direction of the chain curing adhesive and the second chain curing adhesive The bonded joint extending direction is such that the capacity per unit length in the bonded portion extending direction is greater than the capacity per unit length in the adhered bonded portion extending direction of the first chain-curing adhesive. as it provided continuously along the further the first and second chain-curing adhesive, the start cured epoxy resin And those containing bets, and the epoxy equivalent of the second chain curing adhesive less than epoxy equivalent of the first chain curing adhesive.

  Specifically, in the first aspect of the invention, the first and second adherends are bonded to each other by an adhesive at the bonded joints extending from the two adherends. Target members.

When the energy is applied to a part of the adhesive, the adhesive is subjected to a curing reaction to generate a curing reaction heat, and a part adjacent to the curing reaction part by the curing reaction heat. Is a chain-curing adhesive that undergoes a chain-curing reaction by generating a curing reaction heat by curing reaction, and is cured by applying the energy, and is attached to at least one of the two adherend members. A concave portion extending continuously along the extending direction of the bonded joint portion is formed in the vicinity of the bonded joint portion of the member, and the first chain hardening is performed between the bonded joint portions of the two bonded members. An adhesive is continuously provided along the extending direction of the adherend joint, and a second chain-curing adhesive different from the first chain-curing adhesive is provided in the concave portion. Contact the entire extending direction of the bonded joint of the cured adhesive and The capacity per unit length of the chain-cured adhesive in the direction of extension of the adherend-bonded portion is larger than the capacity per unit length of the first chain-cured adhesive in the direction of extension of the adherend-bonded portion. The first and second chain-curing adhesives include an epoxy resin and a curing initiator, and the second chain-curing adhesion is provided continuously along the extending direction of the adherend joint part. The epoxy equivalent of the agent is smaller than the epoxy equivalent of the first chain-curing adhesive .

  With the above configuration, the second chain-curing adhesive disposed in the concave portion is larger than the first chain-curing adhesive, and the second chain-curing adhesive is the first chain-curing adhesive. Since it is in contact with the entire extending direction of the adherend joint, the first chain hardening is performed by the second chain hardening adhesive even if the gap between the adherent joints is small and the first chain hardening adhesive is small. The chain curing reaction of the adhesive is reliably performed without stopping in the middle, and the entire first chain cured adhesive can be reliably cured together with the second chain cured adhesive.

In addition, the first and second chain-curing adhesives contain an epoxy resin and a curing initiator, and the epoxy equivalent of the second chain-curing adhesive is more than the epoxy equivalent of the first chain-curing adhesive. by shall also small, in the second chain-curing adhesives, curing reaction (cationic polymerization) will exist many epoxy groups necessary, a chain curing reaction in the second chain curing adhesive stably To be done. Therefore, the chain curing reaction of the first chain curing adhesive can be surely performed.

In the invention of claim 2, in the invention of claim 1 , the first chain curing adhesive contains a bisphenol A type epoxy resin and a curing initiator, and the second chain curing adhesive is an alicyclic ring. It shall contain a formula epoxy resin and a curing initiator.

  Thus, in the second chain-curing adhesive, the curing reaction (cationic polymerization) is favorably performed, and the chain curing reaction of the second chain-curing adhesive is stably performed. In addition, the adhesive strength of the first chain-curing adhesive is higher than the adhesive strength of the second chain-curing adhesive, and the bisphenol A type epoxy resin has a hydroxyl group and a benzene ring that have good adhesion to the metal. Therefore, particularly high adhesive strength can be obtained when both adherends are made of metal.

According to a third aspect of the present invention, in the first or second aspect of the invention, each of the adherend members has a flange portion that is overlapped with each other by joining the two adherend members. The joint portions are respectively provided in a part of the width direction of the mating surfaces of the flange portions in the both adherend members so as to extend along the length direction of the flange portions, and the concave portions are It is assumed that it is formed on the mating surface of the flange portion of at least one of the two adherent members so as to extend along the adherend joint portion of the flange portion.

  Thus, the concave portion can be easily formed in the vicinity of the adherend joint portion in the flange portion, and the second chain-cured adhesive is applied to the first joint-cured adhesive in the extending direction of the joint portion. It can be easily brought into contact with the whole.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the concave portion is formed on the mating surface of the flange portion of only one of the two adherend members.

  By doing so, the manufacturing cost of the adherend can be reduced.

According to a fifth aspect of the present invention, in the third or fourth aspect of the present invention, the concave portion is located at the center in the width direction of the mating surface of the flange portion where the concave portion is formed.

  This makes it possible to improve the adhesive strength by providing adherend joints on both sides of the concave portion on the mating surface of the flange portion. In addition, when the adherend joining parts of both adherends are brought together, the second chain-curing adhesive disposed in the concave part normally flows out to both sides of the concave part, but the concave part is the flange part. By being located in the width direction center part, it can prevent that the 2nd chain hardening adhesive agent protrudes outside the flange part. As a result, when at least one of the adherend members is an appearance member, it is possible to prevent the appearance from deteriorating due to the protrusion of the adhesive.

According to a sixth aspect of the present invention, there is provided a method for producing an adhesive bonding member in which the first and second adherent members are joined to each other by an adhesive at the adherend joining portions respectively extended from the adherend members. In the present invention, when the energy is imparted to a part of the adhesive, the adhesive imparts a curing reaction heat by the energy imparting part, and the curing reaction heat causes the curing. A chain-curing adhesive that undergoes a chain-curing reaction when a portion adjacent to the reaction portion undergoes a curing reaction to generate a curing reaction heat, and at least one of the two adherend members includes the adherend. A concave portion extending continuously along the extending direction of the bonded joint portion is formed in the vicinity of the bonded bonded portion of the member, and the bonded bonded portions of the two bonded members are combined with each other. The first chain-curing adhesive between the adherend joints of the two adherends A and the concave portions are arranged continuously along the adherend joint extension direction, the second chain curing adhesive different from the first chain curing adhesive, the first chain curing adhesive The capacity of the second chain-curing adhesive in contact with the entire extending direction of the adherend joining portion and the unit length of the second chain-curing adhesive in the extending direction of the adherend joining portion is the extension of the adherent joined portion of the first chain-curing adhesive An adhesion joining portion matching step that is continuously arranged along the extending direction of the adherend joining portion so as to be larger than the capacity per unit length in the installation direction, and the adherend joining portion matching step Later, by applying the energy to a predetermined portion of the second chain-curing adhesive, the first chain-curing adhesive is chain-cured while the second chain-curing adhesive is subjected to a chain-curing reaction. look contains a chain curing reaction step, the first and second chain-curing adhesive, et Carboxymethyl are those containing a resin and a curing initiator, an epoxy equivalent weight of the second chain curing adhesive is assumed to be smaller than the epoxy equivalent of the first chain curing adhesive.

According to the present invention, the first and second chain-curing adhesives are arranged in the same manner as in the first aspect of the invention when the adherend joint portions of both adherends are brought together, and then the second By applying light or heat energy to a predetermined part of the chain-curing adhesive, the second chain-curing adhesive undergoes a chain-curing reaction, and accordingly, the first chain-curing adhesive also undergoes a chain-curing reaction. At this time, since the second chain-curing adhesive disposed in the concave portion is larger than the first chain-curing adhesive, the chain-curing reaction of the second chain-curing adhesive does not stop halfway. In addition, since the second chain-curing adhesive is in contact with the entire extending direction of the adherend / bonding portion of the first chain-curing adhesive, the gap between the adherend / joining portions is small and the first Even if the amount of the one chain-curing adhesive is small, the chain-curing reaction of the first chain-curing adhesive is surely performed without stopping in the middle, and the entire first chain-curing adhesive is cured. Further, in the second chain-curing adhesive, many epoxy groups necessary for the curing reaction (cationic polymerization) are present, and the chain curing reaction of the second chain-curing adhesive is stably performed. Therefore, the chain curing reaction of the first chain curing adhesive can be surely performed.

In the invention of claim 7, in the invention of claim 6 , the first chain-curing adhesive contains a bisphenol A type epoxy resin and a curing initiator, and the second chain-curing adhesive is Suppose that it contains an alicyclic epoxy resin and a curing initiator. Thus, the same effect as that attained by the 2nd aspect can be attained.

In the invention of claim 8, in the invention of claim 6 or 7 , the concave portion, or a portion corresponding to the concave portion in the adherend member in which the concave portion is not formed before the adherend joining portion matching step. An adhesive placement step of placing at least a second chain-cured adhesive of the two chain-cured adhesives, wherein the chain-cured adhesion disposed in the adhesive placement step in the adherend joining step A part of the agent is allowed to flow between the adherend joint portions of the two adherend members.

Thus, if example embodiment, an adhesive arranging process, on at least one of the adherend member of both deposition member, the first chain curing adhesive disposed, the second chain curing adhesive recess It arrange | positions and it is made to flow into a 2nd chain | linkage by making a part of 2nd chain hardening adhesive agent arrange | positioned at a concave part flow in between the adherence joint parts of both adherends in an adhesion joining part matching process. It can be ensured that the cured adhesive is in contact with the first chain cured adhesive.

According to a ninth aspect of the present invention, in the invention according to any one of the sixth to eighth aspects, each of the adherend members has a flange portion that is overlapped with each other in the adherend joining portion aligning step. The adherend joining portions of the members are respectively provided in part of the width direction of the mating surfaces of the flange portions of the two adherend members so as to extend along the length direction of the flange portions, The part is formed on the mating surface of the flange part of at least one of the two adherent members so as to extend along the adherend joint part of the flange part. Thus, the same effect as that attained by the 3rd aspect can be attained.

In the invention of claim 10, in the invention of claim 9 , the concave portion is formed on the mating surface of the flange portion of only one of the two adherend members. Thus, the same effect as that attained by the 4th aspect can be attained.

According to an eleventh aspect of the present invention, in the ninth or tenth aspect of the present invention, the concave portion is located at the center in the width direction of the mating surface of the flange portion where the concave portion is formed. Thus, the same effect as that attained by the 5th aspect can be attained.

As described above, according to the adhesive bonding member of the present invention and the method for manufacturing the member, the bonded bonding portion is extended in the vicinity of the bonded bonding portion of at least one of the two bonded members. A concave portion extending continuously along the direction is formed, and the first chain-curing adhesive is continuously provided along the extending direction of the bonded joint portion between the bonded joint portions of the two adherend members, the aforementioned recessed portion, the different second chain curing adhesive and the first chain curing adhesive, contacts the adherend junction entire extension direction of the first chain curing adhesive and the second The capacity per unit length of the chain-cured adhesive in the direction of extension of the adherend-bonded portion is larger than the capacity per unit length of the first chain-cured adhesive in the direction of extension of the adherend-bonded portion. , as provided continuously along the adherend joint extension direction, further, the first and second linkage curing adhesive The, and those containing an epoxy resin and a curing initiator, by an epoxy equivalent weight of the second chain curing adhesive it is smaller than the epoxy equivalent of the first chain curing adhesive, the second chain curing The entire first chain-curing adhesive can be reliably cured together with the adhesive, and the desired adhesive strength can be reliably obtained.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, first, a reference form in which first and second chain-curing adhesives 8 and 9 to be described later are the same will be described, and thereafter, the second chain-curing adhesive 9 is the first chain-curing adhesive 8. This embodiment different from FIG.

FIG. 1 shows an adhesive bonding member 1 according to a reference embodiment, in which first and second adherend members 2 and 3 are bonded to each other by an adhesive (a chain curing adhesive described later). It will be. In this preferred embodiment, the first attached member 2 is a metal of the vehicle body outer panel made of steel or aluminum, the second adherend member 3 is a vehicle body inner panel made of metal made of steel or aluminum, The adhesive joining member 1 formed by joining both the adherend members 2 and 3 constitutes a part of a vehicle body of a vehicle (automobile or the like), and is continuous in the length direction of the adherend members 2 and 3. And has a closed cross-sectional portion 4 extending in the direction. Note that at least one of the adherend members 2 and 3 may be made of resin.

  The first adherent member 2 includes a main body 2a extending along the closed cross section 4 and forming a half of the periphery of the closed cross section 4; and the main body 2a on both sides in the width direction of the main body 2a. The second adherend member 3 extends along the closed cross-section portion 4 and the closed cross-section portion 4. A main body part 3a constituting the other half of the periphery, and two left and right flange parts 3b and 3b provided on both sides in the width direction of the main body part 3a so as to continuously extend along the main body part 3a. Have. Then, the flange portion 2b of the first adherend member 2 and the flange portion 3b of the second adherend member 3 are overlapped with each other (the left flange portions 2b and 3b are overlapped with each other and the right flange portion is overlapped). 2b and 3b are superposed on each other), and both flange portions are formed by an adhesive (first and second chain-curing adhesives 8 and 9 described later) disposed between the mating surfaces of both flange portions 2b and 3b. The first and second adherend members 2 and 3 are joined to each other at 2b and 3b. Since the left and right flange portions 2b and 2b have the same configuration, and the left and right flange portions 3b and 3b have the same configuration, one flange portion 2b and a flange overlapped with the flange portion 2b will be described below. The part 3b will be described.

As shown in FIGS. 1 and 2, the length direction of the flange portion 2b (see FIG. 2) is provided at the center portion in the width direction (left-right direction in FIG. 2) of the mating surface of the flange portion 2b in the first adherend member 2. A concave portion 5 extending continuously along the flange portion 2b is formed over the entire surface (in the direction perpendicular to the paper surface of FIG. 2). In this reference embodiment, since the thickness of the first adherend member 2 is small, a bead that protrudes corresponding to the concave portion 5 is formed on the side surface opposite to the mating surface of the flange portion 2b. become. The cross-sectional shape of the concave portion 5 is constant over the entire length direction of the flange portion 2b, but is not necessarily constant.

  In the above adhesive, when light (ultraviolet light or the like) or heat energy is applied to a part of the adhesive, the energy applying portion undergoes a curing reaction to generate a curing reaction heat, and the curing reaction heat causes the curing reaction. A chain-curing adhesive that undergoes a chain-curing reaction when a part adjacent to the part undergoes a curing reaction to generate a curing reaction heat, and is cured by applying the energy. This chain-curing adhesive contains an epoxy resin and a curing initiator. Examples of the epoxy resin include an alicyclic epoxy resin and a bisphenol A type epoxy resin. The curing initiator includes a light / thermosetting initiator such as an aromatic sulfonium salt and a thermosetting initiator such as a sulfonium salt. Then, by applying the above-mentioned energy to a predetermined portion of the adhesive, the adhesive is chain-cured by generating a cation and a curing reaction heat inside the adhesive, thereby curing the entire adhesive. Let

Part of the mating surface of the flange portion 2b of the first adherend member 2 in the width direction, specifically, portions located on both sides of the concave portion 5 on the mating surface (the concave portion 5 on the mating surface). 2) are the adhesion joining portions 6 and 6 (see FIG. 2) of the first adherent member 2, and the first adherend is formed on the mating surface of the flange portion 3b of the second adherend member 3. The portions of the member 2 that oppose the adherend joint portions 6 and 6 are the adherend joint portions 7 and 7 (see FIG. 2) of the second adherend member 3. Thus, the adherend joint portion 6 is continuously extended along the length direction of the flange portion 2b to the flange portion 2b of the first adherend member 2, and the adherend joint portion 7 is The two adherend members 3 and the flange portion 3b are continuously extended along the length direction of the flange portion 3b. Further, the concave portion 5, (in this preferred embodiment, a portion adjacent to the adherend bonded part 6) first in the vicinity of the adherend bonded part 6 of the deposition member 2, along the deposition junction extension direction Thus, it is formed so as to extend continuously.

As shown in FIG. 2, the first chain-curing adhesive 8 is continuously provided along the extending direction of the adherend joining portion between the adherend joining portions 6 and 7 of the adherend members 2 and 3. It has been. Further, in the concave portion 5, the adhesion joining portion extending direction is such that the second chain curing adhesive 9 is in contact with the entire adhesion joining portion extending direction of the first chain curing adhesive 8. It is provided continuously along. The capacity per unit length of the second chain-cured adhesive 9 in the direction of extension of the adherend joint portion is the capacity per unit length of the first chain-cured adhesive 8 in the direction of extension of the adherend joint portion ( More than the total of the first chain-cured adhesive 8 located on both sides of the second chain-cured adhesive 9, in other words, both the chain-cured adhesives 8, 9 are disposed in the direction in which the adherend joined portions extend. The cross-sectional area of the second chain-curing adhesive 9 is larger than the cross-sectional area of the first chain-curing adhesive 8 when simultaneously cut along any one surface perpendicular to the surface. In this reference embodiment, the second chain-curing adhesive 9 is the same as the first chain-curing adhesive 8, and the first chain-curing adhesive 8 is located between the adherend joints 6, 7. The second chain-curing adhesive is located between the concave portion 5 on the mating surface of the flange portion 2b and the concave portion 5 (more precisely, the opening of the concave portion 5) on the mating surface of the flange portion 3b. Agent 9 is used. The adherend joining parts 6 and 7 and the chain curing adhesives 8 and 9 are provided over the entire length direction of the flange parts 2b and 3b.

  The amount of gap between the adherend joining portions 6 and 7 of the adherend members 2 and 3 (the thickness of the first chain-curing adhesive 8) is constant over the entire length of the flange portion 2b (3b). It is set to a predetermined value (preferably 0.01 mm or more and 10 mm or less). It is preferable that the total width of the adherend joint portions 6 (or adherend joint portions 7) located on both sides of the concave portion 5 is 1 mm or more and 30 mm or less. The gap amount need not be constant over the entire length of the flange portion 2b (3b).

Bottom of the concave portion 5 the flange portion 2b part of the length direction of the (bead projecting tip of) (in this preferred embodiment, the central portion of the flange portion 2b length direction), the opening 11 (see FIG. 1 ) And the first and second chain-curing adhesives 8 and 9 apply the energy to the second chain-curing adhesive 9 through the opening 11 as will be described later. Both are cured.

  Next, a method for manufacturing the adhesive bonding member 1 will be described with reference to FIGS.

  First, the first and second adherent members 2 and 3 having the flange portions 2b and 3b and the concave portion 5 formed as described above are prepared. As shown in FIG. 3A, the second adherend member is prepared. 3 is set on the support base 15. At this time, the mating surface of the flange portion 3b of the second adherend member 3 faces upward, and the side surface opposite to the mating surface is on the upper surface of the support portion 15b protruding upward from the base portion 15a of the support base 15. It is in contact.

Then, on the mating surface of the flange portion 3b of the second adherend member 3, a portion corresponding to the concave portion 5 of the flange portion 2b of the first adherend member 2 (of the flange portion 2b of the first adherend member 2). The first and second chain-curing adhesives 8 and 9 (this reference embodiment) are applied to a portion facing the concave portion 5 of the flange portion 2b, that is, the center portion in the width direction of the flange portion 3b when combined with the mating surface. Then, since both are the same, they cannot be distinguished from each other) are continuously applied along the extending direction of the adherend joint. This application is performed, for example, by continuously discharging the adhesive from a nozzle configured to move along the length of the flange portion 3b at a constant speed by a robot. It is applied over the entire length of the flange portion 3b. The maximum height of the applied chain-cured adhesives 8 and 9 is larger than the value obtained by adding the depth of the concave portion 5 to the gap amount.

Subsequently, as shown in FIG. 3 (b), the mating surfaces of the flange portions 2b and 3b in the first and second adherend members 2 and 3 are matched with each other (the adherend joint portions 6 and 7). The flange portions 2 b and 3 b are clamped by the clamp member 16 a of the clamp means 16. That is, the flange portions 2b and 3b are pressed against the support portion 15b by the clamp member 16a. At this time, for example, the first and second adherend members 2 and 3 are brought into contact with each other so that the gap between the adherend joining portions 6 and 7 of the adherend members 2 and 3 becomes the predetermined value. A contact portion is provided. In the present reference embodiment, the clamp member 16a is pressed is brought into contact with the projecting distal end portion of the bead in the flange portion 2b (portion excluding the opening 11). Even if it presses in this way, since the rigidity of the flange portion 2b is increased by the bead, the flange portion 2b does not bend and the adherend joint portions 6 and 7 are stretched over the entire extending direction of the adherend joint portion. Can be maintained at the predetermined value.

  When aligning the mating surfaces of the flange portions 2b and 3b, as shown in FIGS. 4 (a) to 4 (d), a part of both the chain-curing adhesives 8 and 9 is attached to both the adherend members 2 and 3. It is caused to flow between the adherend joints 6 and 7. That is, when the first adherent member 2 is lowered from the upper side of the second adherend member 3, both chain-curing adhesives 8, 9 are applied to the concave portion 5 of the flange portion 2 b of the first adherend member 2. When the first adherend member 2 is further lowered, a part of the chain curing adhesives 8 and 9 flows between the adherend joint portions 6 and 7 of the adherend members 2 and 3. In this way, the first chain-cured adhesive 8 that flows between the adherend joint portions 6 and 7 becomes the first chain-cured adhesive 8, and the one that is disposed in the concave portion 5 becomes the second chain-cured adhesive 9. This second chain-curing adhesive 9 is in contact with the entire extending direction of the bonded joint portion of the first chain-curing adhesive 8. Further, due to the depression of the concave portion 5, the capacity per unit length in the direction in which the second chain-cured adhesive 9 is adhered is extended in the direction in which the first chain-cured adhesive 8 is adhered. More than the capacity per unit length. When the mating surfaces of the flange portions 2b and 3b are matched, it is preferable to close the opening 11 with a closing member.

  Before joining the mating surfaces of the flange portions 2b and 3b, both chain-curing adhesives 8 and 9 are applied to the mating surfaces of the flange portion 3b of the second adherend member 3 (this coating method is the first method). Instead of the chain curing adhesives 8 and 9 may be applied to the concave portion 5 of the flange portion 2b of the first adherend 2 (this application method is referred to as the second application method). Called). In this second coating method, the first adherend member 2 is set on the support base 15 so that the mating surface of the flange portion 2b faces upward, and both chain-curing adhesives 8 and 9 are placed on the concave portion 5. (The opening 11 is not provided on the bottom surface of the concave portion 5, but is provided in a portion corresponding to the concave portion 5 in the flange portion 3b of the second adherend 3). The maximum height of the applied chain cured adhesives 8 and 9 is the same as that in the first application method. Then, by matching the mating surfaces of the flange portions 2b and 3b, as shown in FIGS. 5 (a) to 5 (d), a part of the chain-curing adhesives 8 and 9 arranged in the concave portion 5 is used as described above. It is caused to flow between the adherend joints 6 and 7 of the adherend members 2 and 3.

  Alternatively, the first chain-curing adhesive 8 is applied to the adherend joint portion 6 of the flange portion 2b of the first adherend member 2 and the concave portion 5 of the flange portion 2b of the first adherend member 2 2 may be applied (this application method is referred to as a third application method). In this third coating method, when the mating surfaces of the flange portions 2b and 3b are matched, a part of the second chain-curing adhesive 9 disposed in the concave portion 5 is applied to both the adherend members 2 and 3. It is preferable that the second chain-cured adhesive 9 is brought into contact with the first chain-cured adhesive 8 reliably (see the following fourth). The same applies to the sixth coating method).

  Alternatively, the first chain-curing adhesive 8 is applied to the adherend joint portion 7 of the flange portion 3 b of the second adherend member 3, and the concave portion 5 is applied to the flange portion 3 b of the second adherend member 3. You may make it apply | coat the 2nd chain hardening adhesive agent 9 to a corresponding part (this application method is called 4th application method).

  Alternatively, the first chain-curing adhesive 8 is applied to the adherend joint portion 6 of the flange portion 2 b of the first adherend member 2, and the concave portion 5 is formed in the flange portion 3 b of the second adherend member 3. You may make it apply | coat the 2nd chain hardening adhesive agent 9 to a corresponding part (this coating method is called a 5th coating method).

  Alternatively, the first chain-curing adhesive 8 is applied to the adherend joint portion 7 of the flange portion 3b of the second adherend member 3, and the concave portion 5 of the flange portion 2b of the first adherend member 2 is applied first. 2 may be applied (this application method is referred to as a sixth application method).

When the 2nd chain hardening adhesive 9 is the same as the 1st chain hardening adhesive 8 like this reference form, the said 1st or 2nd coating method is especially preferable. By doing so, the adhesive placement step can be simplified. Next, the third or fourth coating method is preferable. In addition, even when the second chain-curing adhesive 9 is different from the chain-curing adhesive 8 as in the embodiment described later, the first to sixth coating methods can be adopted. From the viewpoint of reliably arranging the first chain-curing adhesive 8 between the joint portions 6 and 7, the third or fourth coating method is preferable.

  In this way, by matching the mating surfaces of the flange portions 2b and 3b (matching the adherend joining portions 6 and 7 of both adherend members 2 and 3), the first chain is formed between the adherend joining portions 6 and 7. The cured adhesive 8 is continuously arranged along the extending direction of the adherend joint portion, and the second chain cured adhesive 9 is adhered to the concave portion 5 by the adhesion of the first chain cured adhesive 8. The capacity per unit length of the second chain-curing adhesive 9 in contact with the entire extension direction is equal to the extension direction of the adhesion-bonding portion of the first chain-curing adhesive 8. It is set as the state arrange | positioned continuously along the to-be-joined part extension direction so that it may exceed the capacity | capacitance per unit length.

  Next, as shown in FIG. 3 (c), light or heat energy is passed through the opening 11 to a predetermined portion (a portion corresponding to the opening 11) of the second chain-curing adhesive 9 of the concave portion 5. The first chain-curing adhesive 8 is subjected to a chain curing reaction while the second chain-curing adhesive 9 is subjected to a chain curing reaction. At this time, since the second chain-curing adhesive 9 in the concave portion 5 is larger than the first chain-curing adhesive 8, sufficient curing reaction heat is generated, and the clamp member 16a of the clamping means 16 Even if a part of the curing reaction heat is taken away, the chain curing reaction of the second chain curing adhesive 9 is surely performed without stopping on the way. Further, since the second chain-curing adhesive 9 is in contact with the entire extending direction of the bonded joint portion of the first chain-curing adhesive 8, even if the first chain-curing adhesive 8 is adhered to the joint portion. Even if there is a break in a part of the installation direction, the chain curing reaction of the first chain curing adhesive 8 is reliably performed without stopping on the way. Accordingly, the entire first chain-cured adhesive 8 is cured together with the second chain-cured adhesive 9.

  In addition, the said opening part 11 for providing energy to the 2nd chain hardening adhesive agent 9 does not need to be one place about one concave-shaped part 5, but several places (clamp member in the adhesion joining part extension direction). 16a), and energy may be applied to the second chain-curing adhesive 9 from each opening 11.

The flange portion 2b of both deposition members 2,3, 3b is basically are bonded together by a first chain curing adhesive 8 between the adherend joint 6, in the present reference embodiment, The second chain-curing adhesive 9 in the concave portion 5 of the flange portion 2b is in contact with the flange portion 3b and serves to bond the flange portions 2b and 3b together.

  Here, the specific example of the vehicle body as the said adhesive joining member 1 is shown. FIG. 6 shows a side body 21 of the vehicle body, and the side body 21 includes an outer panel 22 and an inner panel 23 as shown in FIG. On the entire periphery of the peripheral edge of the door opening 24 of the side body 21, the flange 22a of the outer panel 22 (the concave portion 5 is formed at the center in the width direction) and the flange 23a of the inner panel 23 are bonded to each other. It is joined. The outer panel 22 corresponds to the first adherent member 2, the inner panel 23 corresponds to the second adherent member 3, and the configuration of the joint portion of the flange portions 22 a and 23 a is configured by both adherent members 2, 2. 3 (the illustration of the first and second chain-curing adhesives 8 and 9 is omitted).

  FIG. 8 shows a joint portion between the roof panel 26 and the roof side rail 27. That is, the flange portion 28a of the inner panel 28 of the roof side rail 27 (the concave portion 5 is formed in the center in the width direction) and the flange portion 29a of the outer panel 29 of the roof side rail 27 are bonded and bonded together. The flange portion 26a of the roof panel 26 (the concave portion 5 is formed at the center in the width direction) and the flange portion 29a of the outer panel 29 of the roof side rail 27 are bonded to each other. In the joining of the inner panel 28 and the outer panel 29 of the roof side rail 27, the inner panel 28 corresponds to the first adherend member 2, the outer panel 29 corresponds to the second adherent member 3, and the joining portion. This configuration is the same as the joint portion of the two adherend members 2 and 3. Further, when the roof panel 26 and the outer panel 29 of the roof side rail 27 are joined, the roof panel 26 corresponds to the first adherend member 2, and the outer panel 29 of the roof side rail 27 corresponds to the second adherend member 3. The structure of the joint portion is the same as that of the joint portions of the two adherend members 2 and 3 (the illustration of the first and second chain-curing adhesives 8 and 9 is omitted).

  FIG. 9 shows a joint portion between the side sill 31 and the floor panel 32. That is, the end portion in the vehicle width direction of the floor panel 32 is a vertically extending portion 32a that is bent upward and extends vertically, and the vertically extending portion 32a and the lower end portion of the side sill 31 (the portion of the portion facing the vertically extending portion 32a) A concave portion 5 is formed at the center in the vertical direction). In this example, the side sill 31 corresponds to the first adherend member 2, the floor panel 32 corresponds to the second adherend member 3, and the configuration of the joint portion thereof includes both the adherend members 2 and 3. It is the same as a joining part (illustration of the 1st and 2nd chain hardening adhesives 8 and 9 is abbreviate | omitted).

Here, the embodiment of the present invention will be described only with respect to differences from the reference embodiment. In the above reference embodiment, the second chain-curing adhesive 9 is the same as the first chain-curing adhesive 8, but in the present embodiment, the second chain-curing adhesive 9 is the first chain-curing adhesive 8. and Ru der different from what is. The epoxy equivalent of the second chain curing adhesive 9 is less than the epoxy equivalent of the first chain-curing adhesive 8. In to Rukoto this, in the second chain-curing adhesive 9, the curing reaction will exist many epoxy groups necessary (cationic polymerization), the chain curing reaction in the second chain curing adhesive 9 is stably To be done. As a result, the chain curing reaction of the first chain curing adhesive 8 can be surely performed. The first chain-curing adhesive 8 preferably contains a bisphenol A type epoxy resin and a curing initiator, and the second chain-curing adhesive 9 includes an alicyclic epoxy resin and a curing initiator. What is contained is preferable. In this way, the second chain-curing adhesive 9 can satisfactorily perform the curing reaction (cationic polymerization), and the first chain-curing adhesive 8 has the same adhesive strength as the second chain-curing adhesive. It can be higher than the adhesive strength of 9. Since the bisphenol A type epoxy resin has a hydroxyl group and a benzene ring that have good adhesion to the metal, particularly high adhesion strength can be obtained when both the adherend members 2 and 3 are made of metal as in the above reference embodiment. .

In the reference embodiment and the embodiment described above, the concave portion 5 is provided in the center portion in the width direction of the mating surface of the flange portion 2b of the first adherent member 2. The concave portion 5 is the first adherend member. 2 may be provided at one or both end portions in the width direction of the mating surface of the flange portion 2b (the adherend joining portion 6 is provided at the center portion in the width direction of the mating surface of the flange portion 2b). You may provide in the vicinity part (adjacent part) of the flange part 2b in the main-body part 2a. Further, instead of providing the concave portion 5 on the first adherend member 2, the concave portion 5 may be provided on the mating surface of the flange portion 3b of the second adherend member 3 or in the vicinity of the flange portion 3b on the main body portion 3a. You may provide in both the 1st and 2nd adherend members 2 and 3. FIG. In short, the concave portion 5 is provided in the vicinity of the adherend joint portion of at least one of the adherend members 2 and 3 so as to continuously extend along the extending direction of the adherend joint portion. Just do it.

  Furthermore, even if both the adherend members 2 and 3 do not have a flange portion, the present invention can be applied as long as the adherend joining portion and the concave portion can be extended.

Furthermore, in the above reference embodiment and embodiment, the case where the present invention is applied to the body of a vehicle such as an automobile has been shown. However, the present invention is applicable to any object that can be adhesively bonded. be able to.

  The present invention is useful when the first and second adherends are joined to each other with a chain curing adhesive.

It is a perspective view which shows the adhesive bonding member which concerns on a reference form. It is the II-II sectional view taken on the line of FIG. It is a perspective view which shows the manufacturing method of an adhesive joining member, (a) shows the state which set the 2nd to-be-adhered member to the support stand, (b) shows the flange part of the 1st and 2nd to-be-adhered member. The state clamped by the clamp member of the clamp means is shown, and (c) shows the state where light or heat energy is applied to the second chain-curing adhesive through the opening. It is sectional drawing which shows the mode of the flow of the chain hardening adhesive agent at the time of matching the mating surfaces of the flange part of a 1st and 2nd to-be-adhered member. FIG. 5 is a view corresponding to FIG. 4 when the first and second chain-curing adhesives are applied to the concave portion of the flange portion of the first adherend. It is the figure seen from the vehicle body side which shows the side body of a vehicle body. It is the VII-VII sectional view taken on the line of FIG. It is sectional drawing which shows the junction part of a roof panel and a roof side rail. It is sectional drawing which shows the junction part of a side sill and a floor panel.

DESCRIPTION OF SYMBOLS 1 Adhesive joining member 2 1st to-be-adhered member 2b Flange part 3 of 1st to-be-adhered member 2nd to-be-adhered member 3b Flange part 5 of 2nd to-be-adhered member Recessed part 6 Cover of 1st to-be-adhered member Adhesion bonding part 7 Adhesion bonding part 8 of second adherend member 1st chain hardening adhesive 9 2nd chain hardening adhesive

Claims (11)

The first and second adherent members are adhesive joint members that are joined to each other by an adhesive at the adherend joint portions that are respectively extended to the two adherend members,
In the above adhesive, when energy is applied to a part of the adhesive, the energy application part undergoes a curing reaction to generate a curing reaction heat, and the part adjacent to the curing reaction part is cured by the curing reaction heat. A chain curing adhesive that undergoes a chain curing reaction by generating a curing reaction heat by reaction, which is cured by the application of the energy,
A concave portion extending continuously along the extending direction of the bonded joint portion is formed in the vicinity of the bonded joint portion of at least one of the two bonded members.
Between the adherend joint portions of the two adherend members, a first chain-curing adhesive is continuously provided along the adherend joint extension direction,
A second chain-curing adhesive different from the first chain-curing adhesive is in contact with the entire extending direction of the bonded joint portion of the first chain-curing adhesive and the second portion is in the concave portion. The capacity per unit length of the chain-cured adhesive in the direction of extension of the adherend-bonded portion is larger than the capacity per unit length of the first chain-cured adhesive in the direction of extension of the adherend-bonded portion. , Provided continuously along the direction of extension of the adherend joint ,
The first and second chain curing adhesives contain an epoxy resin and a curing initiator,
The adhesive joining member, wherein an epoxy equivalent of the second chain-curing adhesive is smaller than an epoxy equivalent of the first chain-curing adhesive . The adhesive bonding member according to claim 1 ,
The first chain curing adhesive contains a bisphenol A type epoxy resin and a curing initiator,
The second chain-curing adhesive contains an alicyclic epoxy resin and a curing initiator, and is an adhesive bonding member. In the adhesive bonding member according to claim 1 or 2 ,
The both adherend members each have a flange portion that is overlapped with each other by joining the adherend members,
The adherend joining portions of the two adherend members are respectively provided in part of the width direction of the mating surfaces of the flange portions of the two adherend members so as to extend along the length direction of the flange portions. Yes,
The concave portion is formed on the mating surface of the flange portion of at least one of the two adherent members so as to extend along the adherend joint portion of the flange portion. Adhesive joint member. In the adhesive bonding member according to claim 3 ,
The adhesive bonding member, wherein the concave portion is formed on the mating surface of the flange portion of only one of the two adherent members. In the adhesive bonding member according to claim 3 or 4 ,
The adhesive joint member according to claim 1, wherein the concave portion is located in a center portion in the width direction of the mating surface of the flange portion where the concave portion is formed. The first and second adherend members are manufacturing methods of an adhesive joining member in which the first and second adherend members are joined to each other by an adhesive at the adherend joining portions respectively extended to the both adherend members,
In the above adhesive, when energy is applied to a part of the adhesive, the energy application part undergoes a curing reaction to generate a curing reaction heat, and the part adjacent to the curing reaction part is cured by the curing reaction heat. It is a chain-curing adhesive that reacts by chain reaction by generating heat of curing reaction.
At least one of the two adherend members has a concave portion extending continuously along the extending direction of the adherend joint portion in the vicinity of the adherend joint portion of the adherent member. Is,
By aligning the adherend joints of the two adherent members, the first chain-curing adhesive is continuously disposed between the adherend joints of the two adherent members along the extending direction of the adherend joints. to and having the recess is, the first second chain curing adhesive different from the chain-curing adhesive, contacts the entire adherend joint extending direction of the first chain curing adhesive and said 2 so that the capacity per unit length of the chain-cured adhesive in the direction of extension of the adherend-bonding portion is larger than the capacity per unit length of the first chain-cured adhesive in the direction of extension of the adherend-joint portion. In addition, the adherend bonded portion matching step to be continuously arranged along the extending direction of the bonded bonded portion,
The first chain curing is performed while the second chain-curing adhesive is subjected to a chain-curing reaction by applying the energy to a predetermined portion of the second chain-curing adhesive after the adherend joining step. the adhesive saw including a chain curing reaction step of the chain curing reaction,
The first and second chain curing adhesives contain an epoxy resin and a curing initiator,
The method for producing an adhesive bonding member, wherein an epoxy equivalent of the second chain-curing adhesive is smaller than an epoxy equivalent of the first chain-curing adhesive . In the manufacturing method of the adhesive joining member according to claim 6 ,
The first chain curing adhesive contains a bisphenol A type epoxy resin and a curing initiator,
Said 2nd chain hardening adhesive agent contains an alicyclic epoxy resin and a hardening initiator, The manufacturing method of the adhesive joining member characterized by the above-mentioned. In the manufacturing method of the adhesive joining member according to claim 6 or 7 ,
At least the second chain curing of the two chain curing adhesives on the concave portion or the portion corresponding to the concave portion in the adherend member in which the concave portion is not formed before the adherend joining portion matching step. Further comprising an adhesive placement step of placing an adhesive;
In the adherend joining portion matching step, a part of the chain-cured adhesive disposed in the adhesive disposing step is caused to flow between the adherend joining portions of the both adherend members. Method. In the manufacturing method of the adhesive joining member according to any one of claims 6 to 8 ,
The both adherend members each have a flange portion that is overlapped with each other in the adherend joining portion matching step,
The adherend joining portions of the two adherend members are respectively provided in part of the width direction of the mating surfaces of the flange portions of the two adherend members so as to extend along the length direction of the flange portions. Yes,
The concave portion is formed on the mating surface of the flange portion of at least one of the two adherent members so as to extend along the adherend joint portion of the flange portion. The manufacturing method of the adhesive joining member. In the manufacturing method of the adhesive joining member according to claim 9 ,
The method for manufacturing an adhesive bonding member, wherein the concave portion is formed on a mating surface of a flange portion of only one of the two adherent members. In the manufacturing method of the adhesive joining member according to claim 9 or 10 ,
The method for manufacturing an adhesive bonding member, wherein the concave portion is located in a center portion in the width direction of the mating surface of the flange portion where the concave portion is formed.

Images