JP2005105233A - Junction structure, its joining method, and joining device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joining method assuring inhibition of positional displacement of an energy-curing type adhesive caused by shrinkage on curing and capable of highly precise positioning. <P>SOLUTION: A joining method comprises curing an energy-curing type adhesive 14 placed between two members 11 and 12 to give a cured layer 14b in a layer form of the energy-curing type adhesive 14 leaving an uncured layer 14a in the energy-curing type adhesive 14 not so as to bridge the two members 11 and 12 followed by curing the uncured layer 14a. The curing process of the energy-curing type adhesive 14 is carried out to secure an uncured layer by placing a plate separator material 15 to separate the adhesive layer 14a and the uncured adhesive layer 14b for the cured layer followed by curing the energy-curing type adhesive 14. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a joint structure in which the two members are joined by curing of an energy curable adhesive between two members that are aligned to be joined to each other, a joining method thereof, and a joining device.

  Conventionally, curable adhesives such as thermosetting type, anaerobic curable type, light (ultraviolet ray, visible light, etc.) curable type are known as adhesives for bonding two members to each other by component bonding, Some of these have several properties. Among them, energy curable adhesives typified by thermosetting resin adhesives and light curable resin adhesives have a high reaction rate and greatly shorten the curing time. It is used in various fields for the purpose.

  By the way, in this energy curable adhesive, volume shrinkage (curing shrinkage) occurs during curing, and stress (curing shrinkage force) is generated along with the curing shrinkage. Generally, an acrylic ultraviolet curable resin is cured and shrunk by about 5 to 10%, and an epoxy ultraviolet curable resin is about 2 to 5%, and a curing shrinkage force is generated in proportion to the amount of curing shrinkage. This curing shrinkage force causes a slight decrease in strength in terms of adhesive strength, and does not have a significant effect. However, in terms of causing displacement between two members to be joined, it is particularly high in component joining. This is a major problem in precision assembly that requires precise position adjustment. That is, in the precision assembly process, after precisely adjusting the alignment of the adhesive member with respect to the adherend member, the adjusted position is affected by the curing shrinkage of the energy curable adhesive that joins the adherend member and the adhesive member. If the deviation occurs, the function of the precision assembly may be hindered.

  In order to avoid such a problem, the following has been proposed.

  One is to reduce the amount of curing shrinkage by interposing an intermediate holding member between the adherend member and the adhesive member to make the energy curable adhesive thin and small (for example, Patent Document 1). reference).

  The second one is to uniformize the amount of curing shrinkage by controlling the UV (ultraviolet) light to be irradiated to eliminate variations in irradiation (see, for example, Patent Document 2 and Patent Document 3).

  The third is to condense and temporarily fix the UV light to be irradiated and then fix it as divergent light, or to cure each time a photo-curing adhesive is applied to suppress deviation due to thermal deformation (for example, Patent Document 4 and Patent Document 5).

In addition, the fourth is to reduce the amount of cure shrinkage by modifying the energy curable adhesive itself, adding ceramic fine particles or adding fillers, and heat shrinkable resin to UV curable resin. Is added to control curing and shrinkage separately (see, for example, Patent Document 6 to Patent Document 8).
JP-A-10-309801 JP 2001-350072 A Japanese Patent Laid-Open No. 08-72300 Japanese Patent Laid-Open No. 09-243966 JP-A-10-7991 Japanese Patent Application Laid-Open No. 07-201028 JP-A-10-121013 JP 05-41408 A

  However, the invention described in Patent Document 1 assumes surface adhesion, and cannot be used when, for example, a large amount of energy-curable adhesive is required for multi-axis adjustment, etc. There is a problem of being limited. In addition, an intermediate holding member is required and the number of parts is increased. In addition, it is necessary to consider an energy curable adhesive having good adhesion for the three members of the adherend member, the adhesive member, and the intermediate holding member. There is also a problem that the number of adhesion points increases.

  Also, the invention described in Patent Document 2 and the invention described in Patent Document 3 are basically limited to the surface bonding. Furthermore, when there is uneven application of the UV curable adhesive, there is a possibility that misalignment due to curing shrinkage cannot be avoided.

  Moreover, in the invention described in Patent Document 4, there is a problem that even if temporary fixing is first performed by condensing, since the curing shrinkage force at the time of main fixing by diverging light is large, the positional deviation becomes large. On the other hand, in the invention described in Patent Document 5, no consideration is given to cure shrinkage other than thermal deformation, and the amount of cure shrinkage accumulates each time it is cured, and eventually a large misalignment appears. Become.

  Further, in the inventions described in Patent Documents 6 to 8, if the amount of the energy curable adhesive is increased, the amount of curing shrinkage is increased in proportion to the amount of the energy curable adhesive. It is not suitable for adhesive forms that require a large amount of mold adhesive, and the addition of an additive reduces the light transmittance, which necessitates an increase in the amount of energy for curing. There is a case.

  Therefore, in view of such problems, the inventor of the present application previously disclosed in Japanese Patent Application No. 2003-185663, an energy curable adhesive between an adherend member and an adhesive member aligned with the adherend member. Energy-curing adhesive leaving an uncured layer so that the cured layer of the energy-curing adhesive does not bridge the adherend and the adhesive member when joining the adherend and the adhesive member by curing the agent After curing a part of the agent in a layer form, the uncured remaining part is cured, so that the curing shrinkage force in the adhesive layer that is cured first is absorbed by the uncured layer, and the adhesive member and the adherend member An adhesion technique that can reduce the relative misalignment due to the transmission of curing shrinkage force generated during the process is proposed.

  However, in order to make an uncured layer, it is not easy to apply adhesives with different curing speeds or adhesives with different absorption energy bands in layers, and when the adhesive layers are mixed, the adherend member and the adhesive member are cured. There is a problem in that the layers are bonded together at an early stage, the components are displaced due to the contraction force, and the desired effect is reduced. Moreover, even when a cured layer is formed by selectively irradiating an energy beam to the adhesive and an uncured layer is left, the energy beam is scattered between the bonded member and the bonded member inside the adhesive. There is a problem that the cured layer is partially connected and the desired effect is reduced.

  Accordingly, an object of the present invention is to provide a bonding structure, a bonding method, and a bonding apparatus that can reliably suppress misalignment due to curing shrinkage of an energy curable adhesive and that enable easy and highly accurate alignment. It is to provide.

  In the present invention, when the two members are bonded by basically curing the energy curable adhesive between the two members to be bonded, a cured layer of the energy curable adhesive is suspended between the two members. After curing a part of the energy curable adhesive in layers, leaving the uncured layer so that there is no uncured layer, the uncured remaining part is cured, so that the curing shrinkage force in the adhesive layer that hardens first is uncured This suppresses the relative displacement caused by the curing shrinkage force generated between the two members, and further includes an adhesive layer that is cured first and an adhesive layer that is cured after the adhesive layer is cured. A separation member for reliably preventing the two from being mixed with each other before curing is disposed between the two adhesive layers.

  That is, in the invention according to claim 1, the cured layer cured in a layer form of the energy curable adhesive is used to join two members by curing the energy curable adhesive disposed between the two members. A bonding structure formed by curing the uncured layer after forming the cured layer leaving an uncured layer in the energy curable adhesive so as not to bridge between the two members. The cured portion of the curable adhesive is characterized in that a plate-shaped separating member for separating the uncured layer and the adhesive layer for the cured layer is disposed before the curing.

  According to a second aspect of the present invention, in the joining structure according to the first aspect, the adhesive layers separated by the separation member of the energy curable adhesive are made of adhesives having different curing speeds. Features.

  According to a third aspect of the present invention, in the joining structure according to the first aspect, the adhesive layers separated by the separation member of the energy curable adhesive are made of adhesives having different absorption energy bands. It is characterized by.

  According to a fourth aspect of the present invention, in the joining structure according to the first to third aspects, the separating member is disposed so as to surround either one of the two members to be joined to each other.

  According to a fifth aspect of the present invention, in the joining structure according to the fourth aspect, any one of the two members to be joined to each other has a column part, and the other receives the column part at an interval. The energy curable adhesive is filled in a gap between the support column and the peripheral wall of the hole, and the separating member is used to separate the energy curable adhesive into each adhesive layer in the hole. The adhesive layer located inside the separating member of the energy curable adhesive has a curing rate smaller than the curing rate of the adhesive layer located outside the separating member. It is characterized by showing.

  According to a sixth aspect of the present invention, in the joining structure according to any one of the first to fifth aspects, the separating member is made of a material that allows transmission of energy rays irradiated to cure the energy curable adhesive. Features.

  According to a seventh aspect of the present invention, in the joining structure according to the first to sixth aspects, the separating member is made of a stretchable material.

  According to an eighth aspect of the present invention, in order to join two members by curing an energy curable adhesive disposed between the two members, a cured layer cured in a layer form of the energy curable adhesive is the two members. A joining method of curing the uncured layer after forming the cured layer leaving an uncured layer in the energy curable adhesive so as not to bridge between the members, and curing the energy curable adhesive In order to secure the uncured layer in the process, the energy curable adhesive is disposed with a plate-shaped separating member for separating the adhesive layer for the uncured layer and the adhesive layer for the cured layer. It is characterized by curing the agent.

  According to a ninth aspect of the present invention, in the joining method according to the eighth aspect, the curing process of the energy curable adhesive is caused by different curing rates of the adhesive layers separated by the separating member. The cured layer and the uncured layer are formed by the method described above.

  The invention according to claim 10 is the bonding method according to claim 8, wherein the energy curable adhesive is cured by the absorption energy bands of the adhesive layers separated by the separating member being different from each other. The cured layer and the uncured layer are formed in the process.

  The invention according to claim 11 is the joining method according to claim 8, wherein the curing of the energy curable adhesive is performed by selectively irradiating the adhesive layers separated by the separating member. The cured layer and the uncured layer are formed in the process.

  A twelfth aspect of the present invention is the joining method according to the eleventh aspect, wherein the separation member is made of a material that blocks transmission of energy rays irradiated to cure the energy curable adhesive. And

  According to a thirteenth aspect of the present invention, in the joining method according to the eighth aspect, either one of the two members to be joined to each other has a support portion, and the other accepts the support portion at an interval. The energy curable adhesive is filled in a gap between the support column and the peripheral wall of the hole, and the separating member is used to separate the energy curable adhesive into each adhesive layer in the hole. The adhesive layer is disposed in an annular shape around the portion, and the adhesive layer located inside the separation member of the energy curable adhesive is cured after the adhesive layer located outside the separation member is cured.

  According to a fourteenth aspect of the present invention, in the joining method according to the thirteenth aspect, the separation member is a tubular member, and after the energy curable adhesive is applied to the inner peripheral surface of the tubular member, the tubular member Is inserted into the support column, and an energy curable adhesive is filled between the outer peripheral surface of the tubular member and the peripheral wall of the hole.

  The invention according to claim 15 is characterized in that each holding means for handling the members to be joined to each other, a supply means for supplying an energy curable adhesive between the two members, and a positional deviation between the two members. Detecting means for detecting, control means for controlling the operation of at least one of the holding means to align the two members based on the detection result from the detecting means, and the supply means between the two members. The cured layer cured in the form of a layer of energy curable adhesive is formed by leaving the uncured layer on the curable adhesive so that the cured layer is not bridged between the two members, and then curing the uncured layer. In order to join the two members, energy beam irradiating means for irradiating the energy curable adhesive with energy rays after alignment of the two members, and separating the adhesive layer before curing between the two members of Characterized in that it comprises an insertion means for inserting the release member.

  According to the first aspect of the present invention, since the energy curable adhesive between the two members to be bonded to each other is separated into layers by the separation member, the uncured layer separated by the separation member It is possible to reliably prevent the hardened layer that has been hardened from being formed between the two members beyond the separating member until the hardened material is cured. Since the force can be absorbed reliably, the displacement between the two members due to the transmission of the shrinkage force of the energy curable adhesive is reliably reduced, so a highly accurate joint structure can be obtained relatively easily. Can do.

  According to invention of Claim 2, since each joining layer from which the cure rate of an energy curable adhesive mutually differs is isolate | separated reliably by the said separation member, one type of energy beam is used as both joining layers. By irradiating simultaneously, in the curing process of the energy curable adhesive, the cured layer formed on the energy curable adhesive is surely prevented from bridging between the two members. This uncured layer can easily absorb the shrinkage force due to curing shrinkage of the hardened layer that has been hardened first, so that the contraction force is transmitted between the two members. Since the positional deviation is reliably reduced, a highly accurate joining structure can be obtained relatively easily.

  According to the third aspect of the present invention, since the bonding layers having different absorption energy bands of the energy curable adhesive are reliably separated by the separating member, energy lines having different energy bands are separated from the energy lines. By irradiating each of the two bonding layers suitable for the belt at different irradiation timings, the cured layer formed on the energy curable adhesive is bridged between the two members in the curing process of the energy curable adhesive. The uncured layer to be prevented can be made reliably, and the uncured layer can absorb the contraction force due to the curing shrinkage of the cured layer that has been cured earlier, so both members by transmitting this contraction force Therefore, a highly accurate joining structure can be obtained relatively easily.

  According to the invention of claim 4, the separation member is disposed between the two members in a stable state by being arranged so as to surround one of the two members to be joined to each other. This makes it easy to apply the energy curable adhesive, and in the curing process of the energy curable adhesive, a cured layer formed on the energy curable adhesive is bridged between the two members. Therefore, an uncured layer can be reliably and easily made, and the displacement between the two members due to the shrinkage of the energy curable adhesive can be reliably reduced. It can be obtained relatively easily.

  According to the fifth aspect of the present invention, the gap between the support column and the peripheral wall of the hole is filled with the energy curable adhesive, and the energy curable adhesive is arranged to surround the support column. Since the separating member of the separation member reliably separates the adhesive layers having different curing speeds on the inner side and the outer side of the separating member, and the adhesive layer having a smaller curing rate than the outer curing rate is disposed on the inner side, the uncured layer is not cured. Since the layer can be formed with a smaller adhesive application amount, the amount of shrinkage when the uncured layer on the inner side of the separation member is cured after the adhesive layer on the outer side of the separating member is reduced is reduced, so that more accurate bonding is achieved. The structure can be obtained relatively easily.

  According to the invention of claim 6, since the separation member is formed of a material that transmits energy rays, the separation member does not block the energy rays, and the separation member prevents energy curing. In the end, unexpected uncured parts remain in the adhesive and the time required for curing does not increase, and the displacement between the two members due to the shrinkage of the energy curable adhesive is reduced. An accurate joining structure can be obtained.

  According to the seventh aspect of the present invention, the separating member having stretchability is deformed in accordance with the cure shrinkage of the adhesive layer that cures first due to the stretchability, and thus is formed by curing first. The internal residual stress of the hardened layer is reduced, and as a result, it is possible to obtain a highly accurate joining structure in which the change due to internal residual stress with time is small and the positional deviation between both members due to the shrinkage of the energy curable adhesive is reduced. .

  According to the eighth aspect of the present invention, since the energy curable adhesive between the two members to be bonded to each other is separated into layers by the separation member, one of the bonding layers separated by the separation member Since the other bonding layer separated by the separation member can be cured in a state in which the fluidity is ensured while maintaining the uncured state, the arrangement of the separation member makes it possible to cure the other bonding layer. The one bonding layer can be reliably left in an uncured state, and thereby, it is possible to reliably prevent a cured layer formed by curing of the other bonding layer from being formed over both the members. Since the uncured layer can absorb the contraction force due to the curing shrinkage of the cured layer with certainty, the displacement between the two members due to the transmission of the contraction force can be reliably reduced, and high accuracy It can be joined both members.

  According to the ninth aspect of the present invention, since both the adhesive layers separated by the separation member have different curing speeds, one type of energy beam is simultaneously irradiated to the two adhesive layers separated by the separation member. This makes it possible to easily create an uncured layer that reliably prevents the cured layer from being formed on both members, so that the displacement between the two members due to the shrinkage of the energy curable adhesive is ensured. It can reduce, and both members can be joined with high precision.

  According to the invention of claim 10, since the absorption energy bands of the two adhesive layers separated by the separation member are different, the cured layer is obtained by irradiating each adhesive layer by switching energy beams having different energy bands. It is possible to easily create an uncured layer that reliably prevents the material from being formed on both members, so that it is possible to reliably reduce misalignment between the two members due to the shrinkage of the energy curable adhesive. Both members can be joined with high accuracy.

  According to the invention of claim 11, by selectively irradiating each adhesive layer separated by the separation member with an energy ray, using one kind of adhesive without changing the kind of the adhesive layer, Since an uncured layer can be easily made to reliably prevent the cured layer from being formed on both members, the displacement between the two members due to the shrinkage of the energy curable adhesive can be reliably reduced. Both members can be joined with high accuracy.

  According to invention of Claim 12, since the said separation member is formed with the material which does not permeate | transmit an energy ray, when hardening one adhesive layer separated by the said separation member, inside an adhesive agent Since the curing of the other adhesive layer due to the scattering of the energy beam is reliably prevented, the cured layer formed by the curing of the one adhesive layer is reliably prevented from being formed on both the members. Since the hardened layer can be easily formed, it is possible to reliably reduce the positional deviation between the two members due to the shrinkage of the energy curable adhesive, and to join the two members with high accuracy.

  According to a thirteenth aspect of the present invention, the gap between the support column and the peripheral wall of the hole is filled with an energy curable adhesive, and the energy curable adhesive is arranged so as to surround the support column. Since the separating member of the separation member reliably separates the adhesive layers having different curing speeds on the inner side and the outer side of the separating member, and the adhesive layer having a smaller curing rate than the outer curing rate is disposed on the inner side, the uncured layer is not cured. Since the layer can be formed with a smaller adhesive application amount, the amount of shrinkage when the uncured layer on the inner side of the separating member is cured after the outer adhesive layer is cured is reduced. The members can be joined.

  According to the fourteenth aspect of the present invention, a tubular separation member having an inner peripheral surface coated with an energy curable adhesive in advance is simply inserted into the support column, so that it is substantially between the support column and the separation member. Since a uniform thin uncured layer can be easily formed, a cured layer formed by curing an adhesive layer filled between the separation member and the peripheral wall of the hole is formed over both the members. Since an uncured layer that reliably prevents this can be easily produced, misalignment between the two members due to the shrinkage of the energy curable adhesive can be reliably reduced, and both members can be joined with high accuracy. be able to.

  According to the fifteenth aspect of the present invention, there is provided means for inserting the separation member between the two members to be joined, and the separation member can be disposed between the two members by the insertion means. The arrangement of the separating member allows the hardened layer that has been hardened first to exceed the separating member and between the two members until the uncured layer separated by the separating member is cured. The uncured layer can surely absorb the shrinkage force due to cure shrinkage of the cured layer, so that the energy cure adhesive can transmit the shrinkage force. It is possible to obtain a joining apparatus that can relatively easily perform highly accurate joining in which positional deviation between both members is reliably reduced.

  The features of the present invention will become more apparent from the following description along with the illustrated embodiments.

FIG. 1 schematically shows a joining structure 10 formed by a joining method according to the present invention.
In the example shown in FIG. 1, for example, an optical base member 11 such as a glass plate, a ceramic plate, or a metal plate, and an optical element such as a lens, a diffraction grating, or a mirror on the optical base member, a light receiving element, a light emitting element, or a CCD. A rectangular optical member 12 such as a solid-state image pickup element is joined to each other by adhesive portions 13 at the four corners of the optical member after the mutual alignment.

  Each adhesive portion 13 is cured with energy such as a photo-curing adhesive such as UV (ultraviolet) curing or visible light curing, or a radiation curing adhesive such as X-ray curing. A mold adhesive 14 (14a, 14b) is applied, and a separating member 15 is disposed in a cured portion of the energy curable adhesive. The separation member 15 can basically be formed of a plate-like member such as a metal or a synthetic resin material as long as it can separate the two energy curable adhesives 14a and 14b before curing.

  In the example shown in FIG. 1, the separation member 15 is spaced on the optical base member 11 at two corners of the optical member at four corners of the rectangular optical member 12 arranged on the optical base member. And the chamfered sides 15b formed between the right-angled sides 15a and 15a. The chamfered side 15b of the separating member 15 is unnecessary, and an angle-shaped separating member formed by the two right-angled sides 15a and 15a that are continuous with each other can be used.

  In order to join the optical base member 11 and the optical member 12, first, the optical member 12 is arranged at a predetermined position on the optical base member 11 by mutual alignment of the members 11 and 12. After the mutual alignment of the members 11 and 12, each separating member 15 has an optical base member such that the right side 15a and 15a are spaced from the right side of each corner of the optical member 12 along the corner. 11 is arranged.

  Depending on the arrangement of the separation member 15, the separation member 15 is divided into an inner side of the separation member 15, that is, each corner side of the optical member 12, and an outer side of the separation member 15. After the separation member 15 is arranged, an adhesive 14a is supplied in a piled shape between the separation member and the optical member 12 inside the separation member, and on the outside of the separation member 15 the Adhesive 14b is supplied between the optical member 12 and the optical base member 11 so as to join the outer peripheral surface of the separating member and the optical base member 11 together.

  For example, a coating syringe can be used to supply the adhesives 14a and 14b, and instead of this, for example, a spray method, a mist method, or the like can be appropriately employed. By supplying the adhesives 14a and 14b, as shown in FIG. 2, each separating member 15 is positioned between the adhesive layers (14a and 14b) so as to partition the adhesives 14a and 14b. In the example shown in FIG. 2, the adhesive layer (14 a) made of one adhesive 14 a is in contact with the upper surface of the optical base member 11, but is slightly between the one adhesive layer (14 a) and the optical base member 11. It is desirable to provide an interval. However, since the bonding surface of the adhesive layer (14a) to the optical base member 11 and the bonding surface of the bonding layer (14a) to the optical member 12 and the bonding surface to the separation member 15 are extremely small, The direct bonding between the adhesive layer (14a) and the optical base member 11 can be substantially ignored. In the illustrated example, the thickness dimension of one adhesive layer (14a), that is, the thickness dimension along the distance direction between the optical member 12 and the separating member 15 is larger than that of the other adhesive layer (14b). small.

  For example, the same energy curable adhesive can be used for both the adhesives 14a and 14b, and they are reliably separated from each other regardless of the fluidity before curing by the arrangement of the separating member 15 described above.

  Each layer of the two adhesives 14a and 14b partitioned in layers is simultaneously cured while being prevented from being mixed with each other by the separating member 15 by, for example, selective light irradiation as shown in FIGS. For example, until the other adhesive, that is, the other adhesive layer (14b) has been cured, the fluidity of the one adhesive, that is, the adhesive layer (14a) is ensured without completing the curing.

  In FIG. 3, the energy curable adhesives 14a and 14b are selected by the rotation of the scanning reflection mirror 17 or the horizontal driving of the irradiation light from the irradiation light source 16 for curing both adhesive layers (14a, 14b). The example which irradiates automatically.

  When the other adhesive layer (14b) receives the irradiation light from the irradiation light source 16 by driving the scanning reflection mirror 17, the one adhesive layer (14a) is not irradiated. By this selective irradiation, the other adhesive layer (14b) is first cured. By curing the other adhesive layer (14b), the adhesive layer, that is, the cured layer (14a) has a curing shrinkage force accompanying the curing, but is not irradiated with the other adhesive layer (14a), that is, the uncured layer. Since the fluidity is maintained in (14a), the curing shrinkage force of the cured layer (14b) is absorbed by the fluidity of the uncured layer (14a). Therefore, although the separating member 15 is slightly pulled away from the optical member 12 by the hardening of the hardened layer (14b), an uncured layer (14a) having fluidity exists between the separating member 15 and the optical member 12. Therefore, the optical member 12 is not displaced on the optical base member 11 by the curing shrinkage force of the cured layer, that is, the other adhesive layer (14b).

  After the other adhesive layer (14 b) is cured, as shown in FIG. 3, one adhesive layer (14 a) that is an uncured layer is selectively irradiated with scanning light from the scanning reflection mirror 17. To cure. When the one adhesive layer (14a) is cured, the other adhesive layer (14b) is already cured, and the thickness dimension of the one adhesive layer (14a) is smaller than that of the other adhesive layer (14b). Therefore, when this one adhesive layer (14a) is cured, a small curing shrinkage force acts only as a tensile stress between the optical member 12 and the separating member 15, and in the illustrated example, both sides of the optical member 12 are provided. Thus, since the small curing shrinkage force of each of the other adhesive layers (14b) acts so as to be substantially balanced, the optical member 12 is not displaced by the curing shrinkage force of the one adhesive layer (14a).

  FIG. 4 shows an example of selectively irradiating both adhesive layers (14a, 14b) using a light control member 18 such as a transmitted light amount variable filter that makes the amount of light transmitted from the irradiation light source 16 variable. .

  Specifically, for example, a liquid crystal filter is used for the light control member 18, and the transmitted light region is adjusted by voltage adjustment. Instead of the liquid crystal filter, a polarizing filter may be combined, and the transmitted light region may be adjusted by changing the polarization axis from the irradiation light source 16.

  In any case, as shown in FIG. 4A, the light control member 18 has a light shielding region 18a at the center of the light control member 18 so that the other adhesive layer (14b) can be selectively irradiated. A light-transmitting region 18b is formed that surrounds the light-shielding region and allows light transmission to the other adhesive layer (14b). In this state, when the other adhesive layer (14b) is selectively irradiated with light from the irradiation light source 16 through the light control member 18, the other adhesive layer (14b) is selectively cured.

  Curing of the other adhesive layer (14b) causes a curing shrinkage force accompanying the curing of the other adhesive layer, but one adhesive layer (14a) that is not irradiated is left uncured and has fluidity. Since it is in the held state, the curing shrinkage force of the other adhesive layer (14b) is absorbed by the fluidity of the uncured adhesive layer (14a). Therefore, due to the presence of the uncured adhesive layer (14a), the optical member 12 is not displaced on the optical base member 11 when the other adhesive layer (14b) is cured.

  Thereafter, as shown in FIG. 4B, the light shielding region 18a and the light transmitting region 18b of the light control member 18 are switched, and thereby one of the adhesive layers (14a) is selectively irradiated with light. At this time, as described with reference to FIG. 3, when the one adhesive layer (14 a) is cured, the optical member 12 is moved on the optical base member 11 by the curing shrinkage force of the adhesive layer. There is no displacement.

  As described with reference to FIGS. 3 and 4, the energy curable adhesives 14 (14 a, 14 b) are separated from each other by the separating member 15, so that the other adhesive layer (14 b) is selectively cured. It is possible to reliably prevent the adhesive layer (14a) of the optical member 12 from being cured, and due to the fluidity of the uncured one adhesive layer (14a), the optical member 12 of the other adhesive layer (14b) is cured. Displacement can be reliably prevented. Further, the arrangement of the separating member 15 can reliably prevent the cured portion from reaching the one adhesive layer (14a) beyond the separating member 15 when the other adhesive layer (14b) is cured.

  When the adhesive is selectively irradiated with energy rays for selective curing of the energy curable adhesive 14b, scattered light generated inside the irradiated energy curable adhesive 14b is separated. If one energy curable adhesive 14a passes through 15 and reaches one energy curable adhesive 14a, this one adhesive 14a may be partially cured. In order to surely prevent the one adhesive 14a from being unexpectedly cured, it is desirable that the separation member 15 is made of a material that does not transmit energy rays.

  Further, the separation member 15 for separating the energy curable adhesives 14 (14a, 14b) from each other can be formed of a rectangular frame surrounding the optical member 12, as shown in FIG. By using the separation member 15 made of a rectangular frame, the separation member can be positioned at a predetermined position on the optical base member 11 in a stable state. Further, the energy curable adhesive 14 (14a, 14b) can be easily applied by the stable arrangement of the separating member 15.

  Further, as shown in FIG. 6, each adhesive layer (14 a, 14 b) of the energy curable adhesive 14 is built up on the inner and outer peripheries of the separating member 15 made of a rectangular frame surrounding the optical member 12. As a result, the adhesive member 13 can be formed by surrounding the optical member 12, so that both the members 11 and 12 can be joined more firmly.

  In the above description, the same energy curable adhesive is used for both adhesive layers (14a, 14b) of the energy curable adhesive 14, but the other adhesive layer (14a) with fluidity secured in the other adhesive layer (14a). In order to cure the adhesive layer (14b), it is possible to use, as the adhesives 14a and 14b, adhesives having different absorption energy bands or adhesives having different curing speeds as in the examples described later. .

  In the joining structure 110 shown in FIGS. 7 to 9, the optical base member 11 is formed with a column portion 11a, and the optical member 12 is formed with a hole 12a for receiving the column portion spaced from the column portion 11a. In addition, an adhesive portion 13 that joins both the members 11 and 12 is formed in association with the hole and the column portion 11a.

  FIG. 7 shows the entire joining structure 110 of both members 11 and 12, and the bonding portions 13 are formed at the four corners of the optical member 12, respectively. One of the bonding portions 13 is shown enlarged in FIG. 8, and FIG. 9 shows a cross section of one bonding portion 13.

  As clearly shown in FIG. 9, the optical member 12 is held on the optical base member 11 at a distance from the optical base member, and in the hole 12 a of the optical member, a support portion of the optical base member 11 is provided. 11a is inserted. A separation member 15 made of an annular member is disposed on the support column 11a at a distance from the peripheral surface of the support column 11a. The outer peripheral surface of the separating member 15 is spaced from the peripheral wall of the hole 12a. The interval between the separation member 15 and the support column 11a is set smaller than the interval between the hole 12a and the peripheral wall.

  One adhesive 14a is filled between the separating member 15 and the support 11a, that is, inside the separating member 15, and between the separating member 15 that is outside the separating member 15 and the peripheral wall of the hole 12a. The other adhesive 14b is filled, and by the hardening of the adhesive layers (14a, 14b) made of these adhesives 14a, 14b, the separating member 15 is partially separated in the adhesive layers (14a) by the adhesive portions 13. 14b).

  In order to form the bonding structure 110, as shown in FIG. 10A, first, the column portion 11 a of the optical base member 11 is formed in the hole of the optical member 12 by the mutual alignment of the optical base member 11 and the optical member 12. The optical member 12 is disposed at a predetermined location on the optical base member 11 so as to be positioned in the region 12a. After the mutual alignment of the members 11 and 12, the separation member 15 formed of an annular member surrounds the support column 11a in the hole 12a so as to be spaced from the outer peripheral surface of the support column 11a and the peripheral wall of the hole 12a. Be placed. Due to the arrangement of the separation member 15, with the separation member as a boundary, a gap is formed between the support member 11 a on the inner side of the separation member 15 and a peripheral wall of the hole 12 a on the outer side of the separation member 15. Each is formed.

  As shown in FIG. 10B, one energy curable adhesive 14a is filled in the gap inside the separating member 15 by using, for example, a coating syringe 19a, and one adhesive layer is filled by filling the adhesive. (14a) is formed.

  Thereafter, as shown in FIG. 10 (c), the gap on the outside of the separating member 15 is filled with the other energy curable adhesive 14b using another application syringe 19b. The adhesive layer (14b) is formed.

  Prior to disposing the separating member 15 so as to surround the support column 11a, as shown in FIG. 11A, an adhesive 14a is previously applied to the inner wall surface of the separating member 15 made of an annular member using, for example, a coating syringe 19a. Can be applied. In the application of the adhesive 14a, it is desirable to supply the adhesive 14a from the application syringe 19a to the inner peripheral surface of the separation member 15 while rotating the annular separation member 15 about the axis thereof, whereby the separation member 15 is supplied. The uniform adhesive layer (14a) can be formed relatively easily over the entire inner peripheral surface of the fifteen.

  As shown in FIG. 11 (b), the separation member 15 to which one adhesive 14a is applied is inserted into the column portion 11a of the optical base member 11, and then, as shown in FIG. 11 (c), the application syringe 19b. The other adhesive layer (14b) can be formed by filling the space between the separating member 15 and the peripheral wall of the hole 12a with the other adhesive 14b.

  As shown in FIGS. 11A to 11C, one adhesive 14a is applied to the separating member 15 in advance, and the separating member 15 on which the adhesive layer (14a) is formed is inserted into the support column 11a. Then, by forming the other adhesive layer (14b), it is possible to relatively easily form the adhesive layer (14a) having a uniform thickness between the separating member 15 and the support column 11a. . Also, one adhesive 14a can be applied to the separating member 15 in advance in an off-line state, and the bonding process time can be shortened.

  Energy curable adhesives having different curing speeds can be used for the energy curable adhesives 14a and 14b forming both the adhesive layers (14a and 14b). Different energy curable adhesives can be used.

  When energy curable adhesives having different curing speeds are used, for example, one adhesive 14a constituting one adhesive layer (14a) has a slower curing speed than that of the other adhesive layer (14b). It is done. In this case, for example, an acrylic adhesive (3033B manufactured by ThreeBond Co., Ltd.) can be used for the other energy curable adhesive 14b, and an epoxy adhesive can be used for the energy curable adhesive 14a. (AT9290F manufactured by NTT Advanced Technology Co., Ltd.) can be used.

  Here, the photocurable adhesive is composed of a photopolymerizable oligomer, a photopolymerizable monomer, a photoinitiator, a curing agent, and other additives, but the difference in curing speed differs in the type of the curing agent. It depends. Examples of the curing agent include aliphatic amines, cycloaliphatic amines, aromatic amines, acid anhydrides, and the like.

  When energy curable adhesives having different curing speeds are used, the light from the irradiation light source 16 is uniformly applied to both the energy curable adhesives 14a and 14b from above the bonding portion 13 as shown in FIG. By irradiating, that is, without using the scanning reflection mirror 17 or the light control member 18, the other adhesive layer (14b) is cured without curing one adhesive layer (14a), and then one adhesive layer is cured. (14a) can be cured.

  FIG. 13 shows the relationship between the energy ray irradiation time of the irradiation light source 16 and the on / off state of the irradiation, and the curing rate of the energy curable adhesive 14 (14a, 14b) by the energy ray irradiation from the irradiation light source 16. The relationship between change and time is shown by a graph having a common time axis (X axis).

  A characteristic line 20 shown in the graph of FIG. 13 indicates that energy rays are continuously emitted from the irradiation light source 16 at time t1. After the start of irradiation of this energy ray, as shown by the characteristic line 21, first, the curing of the other adhesive layer (14b) constituted by the other adhesive layer 14b starts, and the curing rate increases toward the saturation value 100. To do. After the other adhesive layer (14b) starts to cure, as shown by the characteristic line 22, one adhesive layer (14a) constituted by one adhesive 14a begins to cure. At time t2 when a predetermined time has elapsed from time t1, the curing rate of the other adhesive layer (14b) reaches a substantially saturated value, but at this time, the curing rate of one adhesive layer (14a) is in a low state, The fluidity of the adhesive layer is maintained. Furthermore, at the time t3 when a predetermined time has elapsed from the time t2, the curing rate of the one adhesive layer (14a) also approaches the saturation value. Between the time t2 and the time t3, the other adhesive layer (14b) is almost completely cured, but the one adhesive layer (14a) is cured but the curing is not completed, and its fluidity Is held.

  Here, the completion of the curing of each layer of the energy curable adhesive 14 (14a, 14b) refers to a state in which the fluidity is lost in the entire area of the target layer of the adhesive portion 13. Therefore, it does not necessarily indicate a state where the polymerization rate is 100%.

  As described with reference to the graph of FIG. 13, the curing speed of the energy curable adhesive 14 (14 a, 14 b) is made different from each other so that the fluidity of one adhesive layer (14 a) is maintained while the other is maintained. The adhesive layer (14b) can be cured, and even if tensile stress is generated due to curing shrinkage by the cured layer (14b), the tensile stress is absorbed by the uncured layer (14a) having fluidity. . In addition, since the energy curable adhesives 14a and 14b having different curing speeds are reliably separated by the separating member 15, both of the uncured states are not mixed. The cured portion of the layer 14b does not reach the support column 11a beyond the separating member 15, and when the one adhesive layer (14a) is uncured, the cured portion of the energy curable adhesive 14 is the optical member 12 and the optical base member. It is not formed so as to hang over the 11 pillar portions 11a.

  As a result, it is possible to reliably prevent the occurrence of displacement between the optical base member 11 and the optical member 12 due to the curing shrinkage of the cured layer 14b which is the other adhesive layer.

  After the other adhesive layer 14b is cured, curing of the one adhesive layer (14a), which is an uncured layer, causes curing shrinkage in the adhesive layer, but the thickness dimension of the one adhesive layer (14a) is the same as that of the other adhesive layer (14a). Since it is smaller than that of the layer 14b, the optical member 12 is only affected by slight curing shrinkage of the one adhesive layer (14a). Therefore, the conventional large displacement due to the curing shrinkage of the adhesive layers 14a and 14b does not occur between the optical base member 11 and the optical member 12, and the bonding structure 10 bonded with higher accuracy than in the past. Is provided.

  Further, by using the separating member 15, mixing of the two energy curable adhesives 14a and 14b before curing can be surely prevented, and an application operation that does not cause mixing of the adhesives 14a and 14b can be easily performed. It can be carried out.

  When energy curable adhesives 14 (14 a, 14 b) having different curing speeds are used, each separating member 15 is preferably formed of a material that transmits energy rays from the irradiation light source 16. More specifically, when a UV curable adhesive is used as the energy curable adhesive 14 (14 a, 14 b), polypropylene, trifluoride ethylene, polyvinyl alcohol, high pressure, which allows the ultraviolet light from the irradiation light source 16 to pass therethrough. It is desirable to form the separating member 15 from polyethylene or the like made by the method, thereby preventing uneven irradiation of the irradiation light by the separating member 15, and partial energy curing type adhesive 14 (14a, 14b) due to the uneven irradiation. Thus, it is possible to reliably prevent a decrease in the curing rate or a remaining uncured portion.

  When energy curable adhesives having different absorption energy bands are used for the energy curable adhesives 14a and 14b forming both adhesive layers (14a and 14b), for example, visible light curing is applied to the energy curable adhesive 14b. Type adhesive (3170B manufactured by Three Bond Co., Ltd.) is used, and UV (ultraviolet) curable adhesive (3033B manufactured by Three Bond Co., Ltd.) is used for the energy curable adhesive 14a. The difference in the absorption energy band is due to the difference in the absorption wavelength of the photoinitiator contained in the energy curable adhesive. Photoinitiators include, for example, benzyl, benzophenone, mifillarzketone, 2-chlorothioxanthone, 2,4-diethylthioxanthone, benzoin ethyl ether, diethoxyacetophenone, benzyldimethyl ketal, 2-hydroxy-2-methylpropiophenone, 1-hydroxycyclohexyl phenyl ketone, aromatic iodonium salt, aromatic sulfonium salt and the like are used. Here, the visible light curable adhesive and the UV curable adhesive are taken as examples. However, the present invention is not limited to this. For example, radiation curable adhesives, X-ray curable adhesives, etc. having different absorption energy bands Any combination may be used.

  The other adhesive layer (14b) made of a visible light curable adhesive and the one adhesive layer (14a) made of a UV curable adhesive are separated by a separating member 15 made of an annular member. As shown in FIG. 14, a UV light irradiation light source 16 a and a visible light irradiation light source 16 b are used for curing the bonding portion 13.

  FIG. 15 shows the relationship between the irradiation time of each UV light irradiation light source 16a and the visible light irradiation light source 16b and on / off of the irradiation, and each energy curable adhesive 14a, 14b by each energy beam irradiation from each irradiation light source 16a, 16b. The relationship between the change in the curing rate and the time is shown by a graph having a common time axis (X axis). In order to control irradiation of irradiation light from each irradiation light source 16a, 16b, a shutter 16c is incorporated in each.

  The characteristic line 23 shown in the graph of FIG. 15 indicates that the shutter 16c of the visible light irradiation light source 16b is released at time t1, and the visible light from the visible light irradiation light source 16b is continuously irradiated onto the bonding portion 13. After the start of the irradiation of visible light, as indicated by the characteristic line 24, the shutter 16c of the UV light irradiation light source 16a is released at a time t2 after the elapse of a predetermined time, and in addition to the previous visible light, the UV light irradiation light source The UV light from 16a is irradiated onto the bonding portion 13 in an overlapping manner.

  As shown by the characteristic line 25 in the graph of FIG. 15, by the irradiation of visible light at time t1, first, curing of the other adhesive layer (14b) constituted by the other adhesive layer 14b starts, and the curing rate is It rises towards a saturation value of 100. After the start of curing of the other adhesive layer (14b), as shown by the characteristic line 26, curing of the one adhesive layer (14a) constituted by the one adhesive 14a starts after irradiation with UV light. At time t2 when a predetermined time has elapsed from time t1, the curing rate of the other adhesive layer (14b) reaches a substantially saturated value, but at this time, the curing rate of one adhesive layer (14a) is in a low state, The fluidity of the adhesive layer is maintained. Furthermore, at the time t3 when a predetermined time has elapsed from the time t2, the curing rate of the one adhesive layer (14a) also approaches the saturation value. Between this time t2 and time t3, as in the example shown in FIG. 13, the other adhesive layer (14b) is almost completely cured, but one adhesive layer (14a) is cured, Curing is not completed and its fluidity is maintained.

  Therefore, by using energy curable adhesives having different absorption energy bands as the energy curable adhesives 14a and 14b, the other adhesive layer (14a) can be maintained while maintaining the fluidity of the other adhesive layer (14a). 14b) can be cured, and even if tensile stress is generated due to curing shrinkage by the other adhesive layer, that is, the cured layer (14b), this tensile stress is applied to one uncured adhesive layer having fluidity, that is, not yet cured. It can be absorbed by the hardened layer (14a). In addition, since the other adhesive layer (14b) is reliably separated from the one adhesive layer (14a) by the separating member 15, both of the uncured states are not mixed, and this mixing prevents the other adhesive layer from adhering to the other adhesive layer (14b). The cured portion of the layer 14b does not reach the support column 11a beyond the separating member 15, and when the one adhesive layer (14a) is uncured, the cured portion of the energy curable adhesive 14 is the optical member 12 and the optical base member. It is not formed so as to hang over the 11 pillar portions 11a.

  As a result, the occurrence of displacement due to the curing shrinkage of the other adhesive layer 14b is reliably prevented between the optical base member 11 and the optical member 12, and thereby the curing of the one adhesive layer (14a) is compared with the conventional one. Thus, a highly accurate joining structure 10 is obtained.

  Each separation member 15 described in the first and second embodiments can be formed of a stretchable material. When the one adhesive layer (14a) is cured after the other adhesive layer (14b) is cured, a contracting force due to the curing of the adhesive layer acts on the separating member 15. By imparting stretchability to the separating member 15, by allowing deformation of the separating member itself, it is possible to prevent residual stress following the curing shrinkage of the adhesive layer from remaining in one of the cured adhesive layers (14a). It is possible to reduce the positional shift of the optical member 12 due to a change with time and a change in temperature due to the residual stress.

  FIG. 16 schematically shows a joining apparatus suitable for carrying out the joining method of the present invention.

  As shown in FIG. 16, the joining device 30 includes holding means 31 and 32 for handling the members 11 and 12 to be joined to each other, and an energy curable adhesive 14 (14 a) between the members 11 and 12. , 14b), supply means 19a, 19b for supplying, detection means 33 for detecting misalignment between the two members 11, 12, and the detection result from the detection means to align both members 11, 12 The control means 34 for controlling the operation of the holding means 32, the energy beam irradiation means 16a, 16b for irradiating the energy curable adhesive 14 (14a, 14b) with the energy beam, and the separation member 15 between the members 11, 12. Insertion means 35 for insertion. The control unit 34 includes a control circuit, and controls the operation of each operation unit in addition to the operation of the holding unit 32. As shown in the second specific example, the separation member 15 is formed of a tubular member that is inserted between the column portion 11a of the optical base member 11 and the optical member 12 in which the hole 12a for receiving the column portion is formed. In the illustrated example, the supply means 19a and 19b are formed of application syringes 19a and 19b that supply energy curable adhesives 14a and 14b having different absorption energy bands to the adhesive portions 13 of both members 11 and 12, respectively. Both application syringes 19a and 19b are operated by each operation circuit 19c operating under the control of the control circuit 34 so as to supply the energy curable adhesives 14a and 14b to the inside and the outside of the separating member 15, respectively. The The energy beam irradiation means 16a and 16b are composed of light irradiation light sources 16a and 16b for curing the energy curable adhesives 14a and 14b having different absorption energy bands. A shutter 16c similar to that described above is provided. The shutter 16c of each light source 16a, 16b is controlled in its opening / closing operation by the control circuit 34.

  One holding means 31 includes a gripping device for gripping the optical base member 11 on the work table 36. The other holding means 32 includes a gripping device provided on an arm 37 that can be adjusted in a multi-axis (x-axis, y-axis, .gamma.-axis) direction by a control circuit 34 on the work table 36. 36, the optical member 12 is positioned in a predetermined posture and position with respect to the optical base member 11 held by the gripping device 31. The position information of both the members 11 and 12 positioned on the work table 36 is detected by, for example, a detection unit 33 including an imaging device, and this position information is sent to the control circuit 34.

  The insertion means 35 is provided on the head portion, a guide portion 35a extending from the outside of the work table 36 to the upper side of the work table, a head portion 35b movable on the guide portion 35a under the control of the control circuit 34, and the head portion. And a gripping device 35c capable of moving up and down, holding the separating member 15 and releasing the same under the control of the control circuit 34.

  When the control circuit 34 positions both the members 11 and 12, the control circuit 34 converts the separating member 15 into the column portion 11 a of the optical base member 11 and the hole 12 a of the optical member 12 based on the positional information from the detection means 33. The insertion means 35 is actuated in order to insert it. When the separation member 15 is inserted at a predetermined position by the operation of the insertion means 35 so as to be spaced from the peripheral wall of the support column 11a and the hole 12a, the operation of the application syringe 19a causes the separation member 15 and the support column 11a to move. One energy curable adhesive 14a is supplied to the gap, and the other energy curable adhesive 14b is supplied to the gap between the separation member 15 and the peripheral wall of the hole 12a by the operation of the application syringe 19b.

  After the supply of both energy curable adhesives 14 (14a, 14b), the shutter 16c of one light source 16b is opened, and first the curing of the other energy curable adhesive 14b starts. When the curing of the other adhesive 14b is almost completed, the shutter 16c of the other light source 16a is opened, whereby the curing of the one energy curable adhesive 14a starts.

  Therefore, according to the joining device 30, as described above, the energy curable adhesives 14a and 14b supplied from the application syringes 19a and 19b, which are supply means, between the members 11 and 12 are cured in layers. After the cured layer (14b) is formed leaving the cured layer (14a) so that the cured layer (14b) is not bridged between the members 11 and 12, the uncured layer (14a) is cured to form the both members 11 , 12 can be joined.

  Moreover, since the separating member 15 for separating the both energy curable adhesives 14 (14a, 14b) can be automatically arranged at an appropriate position, the method according to the present invention can be easily carried out, Thereby, it is possible to easily obtain a highly accurate joining structure as compared with the conventional case.

  In the above description, an example in which a photocurable adhesive is used as the energy curable adhesive has been described. However, the energy curable adhesive is not limited thereto, and examples thereof include a thermosetting adhesive and an anaerobic curable adhesive. Can be used. In the case of a thermosetting adhesive, a cured layer can be formed while leaving an uncured layer by curing each adhesive layer by applying thermal energy while shifting the timing of initiation of curing.

  However, in the case of a thermosetting adhesive, it is necessary to apply heat partially in an oven or the like in order to cure it, which may hinder the improvement of production efficiency or depending on the materials of the members to be joined to each other. It may not be acceptable. In the case of an anaerobic curable adhesive, it is necessary to block air in order to cure the adhesive, which may limit the bonding form.

  On the other hand, as shown in the specific examples, the photocurable adhesive does not have such a problem, is easy to handle, and is practical. Therefore, it is desirable to use the photocurable adhesive.

It is a perspective view which shows the joining structure formed by the joining method which concerns on this invention. It is sectional drawing obtained along line II-II shown in FIG. It is sectional drawing which shows typically the hardening process by the selective energy irradiation in the junction structure using the same adhesive agent. FIG. 4A and FIG. 4B are cross-sectional views schematically showing the respective curing steps of the two adhesives, showing another curing step by selective energy irradiation. It is a perspective view which shows the other joining structure which concerns on this invention. It is a perspective view which shows the other joining structure which concerns on this invention. It is a perspective view which shows the other joining structure which concerns on this invention. It is a perspective view which expands and shows the junction part shown in FIG. It is sectional drawing obtained along the IX-IX line shown in FIG. FIG. 10 (a) is a cross-sectional view showing a separation member arranging step, and FIG. 10 (b) is an application of an adhesive to the inside of the separation member. It is sectional drawing which shows a process, FIG.10 (c) is sectional drawing which shows the application | coating process of the adhesive agent to the outer side of a separation member. 7 shows another assembling procedure of the joining structure shown in FIG. 7, FIG. 11 (a) is a cross-sectional view showing an adhesive applying process to the inside of the separating member, and FIG. 11 (b) is an adhesive applied. FIG. 11C is a cross-sectional view showing a step of applying an adhesive to the outside of the separation member. It is sectional drawing which shows typically the hardening process in the joining structure using the adhesive agent from which hardening rate differs. It is a graph which shows the change of the hardening rate of the adhesive agent accompanying the energy irradiation in the hardening process shown in FIG. It is sectional drawing which shows typically the hardening process in the joining structure using the adhesive agent from which an absorbed energy zone differs. It is a graph which shows the change of the hardening rate of the adhesive agent accompanying the energy irradiation in the hardening process shown in FIG. It is explanatory drawing which shows roughly the structure of the joining apparatus which enforces the joining method which concerns on this invention.

Explanation of symbols

10, 110 Joining structure 11, 12 Two members (optical base member, optical member)
11a Supporting part 12a Hole 13 Adhesive part 14 Energy curable adhesive 14a Uncured layer (one adhesive layer)
14b Hardened layer (the other adhesive layer)
15 Separation member 16 (16a, 16b) Irradiation light source 19 (19a, 19b) Supply means (coating syringe)
30 Joining device 31, 32 Holding means (gripping device)
33 Detection means (imaging device)
34 Control means (control circuit)
35 Insertion means

Claims (15)

  In order to join the two members by curing of the energy curable adhesive disposed between the two members, the cured layer cured in a layer shape of the energy curable adhesive is not bridged between the two members. It is a joint structure formed by curing the uncured layer after forming the cured layer leaving an uncured layer in the energy curable adhesive, and the cured portion of the energy curable adhesive includes A plate-like separating member for separating the adhesive layers for the uncured layer and the cured layer before curing is disposed.   The joining structure according to claim 1, wherein the adhesive layers separated by the separation member of the energy curable adhesive are made of adhesives having different curing rates.   The joining structure according to claim 1, wherein each of the adhesive layers separated by the separation member of the energy curable adhesive is made of adhesives having different absorption energy bands.   The joining structure according to any one of claims 1 to 3, wherein the separating member is disposed so as to surround either one of the two members joined to each other.   Either one of the two members to be joined to each other has a column part, and the other has a hole for receiving the column part at an interval, and the energy curable adhesive is formed between the column part and the hole. The separation member is formed of an annular member disposed around the support in order to separate the energy curable adhesive into each adhesive layer in the hole. The bonding structure according to claim 4, wherein the adhesive layer positioned inside the separating member exhibits a curing rate smaller than a curing rate of the adhesive layer positioned outside the separating member.   6. The joining structure according to claim 1, wherein the separating member is made of a material that allows transmission of energy rays irradiated to cure the energy curable adhesive.   The joining structure according to claim 1, wherein the separating member is made of a stretchable material.   In order to join the two members by curing of the energy curable adhesive disposed between the two members, the cured layer cured in a layer shape of the energy curable adhesive is not bridged between the two members. A bonding method of curing the uncured layer after forming the cured layer leaving an uncured layer on the energy curable adhesive, and securing the uncured layer in the curing process of the energy curable adhesive Therefore, the energy curable adhesive is cured in a state where a plate-shaped separation member for separating the adhesive layer for the uncured layer and the adhesive layer for the cured layer is disposed. Joining method.   The cured layer and the uncured layer are formed in the curing process of the energy curable adhesive by curing rates of the adhesive layers separated by the separating member from each other. Item 9. The joining method according to Item 8.   The cured layer and the uncured layer are formed in the curing process of the energy curable adhesive by the absorption energy bands of the adhesive layers separated by the separation member being different from each other. The joining method according to claim 8.   The cured layer and the uncured layer are formed in the curing process of the energy curable adhesive by irradiating each of the adhesive layers separated by the separation member with selective energy rays. Joining method.   The joining method according to claim 11, wherein the separating member is made of a material that blocks transmission of energy rays irradiated to cure the energy curable adhesive.   Either one of the two members to be joined to each other has a column part, and the other has a hole for receiving the column part at an interval, and the energy curable adhesive is formed between the column part and the hole. The separation member is filled in a gap with a peripheral wall, and the separation member is arranged in an annular shape around the support column so as to separate the energy curable adhesive into each adhesive layer in the hole. The separation member of the energy curable adhesive The bonding method according to claim 8, wherein the adhesive layer located inside is cured after the adhesive layer located outside the separation member is cured.   The separation member is a tubular member, and after the energy curable adhesive is applied to the inner peripheral surface of the tubular member, the tubular member is inserted into the support column, and the outer peripheral surface of the tubular member and the hole The joining method according to claim 13, wherein an energy curable adhesive is filled between the peripheral wall and the peripheral wall.   Respective holding means for handling the members to be joined to each other, supply means for supplying an energy curable adhesive between the two members, detection means for detecting misalignment between the two members, and the detection means A control means for controlling the operation of at least one of the holding means to align the two members based on the detection results from the above, and a layer of energy curable adhesive supplied from the supply means between the two members. In order to bond the both members by curing the uncured layer after forming the cured layer leaving the uncured layer in the curable adhesive so that the cured layer is not bridged between the members. In addition, an energy ray irradiating means for irradiating the energy curable adhesive with an energy ray after alignment of the two members, and an inserting means for inserting a separating member for separating the adhesive layer before hardening between the two members Welding apparatus comprising: a.

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