JP2010229344A - Adhesion method of positioning spacer in automotive glass - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an adhesion method for satisfactorily adhering the whole adhesion surface with an adhesive without reducing working efficiency in adhesion while satisfactorily maintaining a thickness of the adhesive when adhering a positioning spacer to a black ceramic component in automobile glass. <P>SOLUTION: In the adhesion surface 14 of the positioning spacer, while providing a projection 15 at a position which satisfies the relation, s>0.9d, when it is assumed that the minimum separation distance between the projection 15 and a periphery of the adhesion surface 14 is s, and that the major axis of the projection 15 is d, a coating area of the adhesive is considered as an area except between the periphery of the adhesion surface 14 and the projection 15. The coating is performed such that the total coating amount of the adhesive exceeds a product of a height of the projection 15 and an area of the adhesion surface 14. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for bonding positioning spacers (also called clips) in automobile glass.

  Conventionally, when positioning spacers are attached to the front window glass and rear window glass in automobiles, a spacer primer is applied to the entire adhesion surface of the positioning spacers, adhesive is applied to the adhesion surface, and then black ceramics in the automobile glass. A procedure is adopted in which the adhesive is pressed against the region and the adhesive is spread between the adhesion surface of the spacer and the automobile glass to be adhered. When adopting such an adhesive form, it is difficult to make the thickness of the adhesive layer uniform, so a protrusion for maintaining the adhesive thickness is provided at the peripheral edge of the adhesive surface, and the tip of this protrusion is It has been proposed to maintain the distance between the adhesive surface and the surface of the automobile glass by contacting the surface of the automobile glass (see, for example, Patent Documents 1 and 2).

However, when such a protrusion is provided, in a simple application form such as bead application, the adhesive B does not completely wrap around the protrusion 15 and remains separated in two hands as shown in FIG. It protrudes from the peripheral edge portion 14 of the bonding surface, and a gap is formed between the peripheral edge portion of the bonding surface 14 and the automobile glass surface from the outside. And when such a gap is formed, when the automobile glass is attached to the vehicle body, the glass primer may enter the gap, and the positioning spacer and the black ceramic on the glass surface may be adhered by the glass primer. . In particular, curved glass, which is often used at present, has a concave portion on the bonding portion of the positioning spacer, so the peripheral edge of the positioning spacer and the glass surface are located closer together, and such glass primer adhesion occurs. easy.
And when such a situation occurs, most of the adhesion surface of the positioning spacer is adhered to the black ceramic on the glass surface by the adhesive, but the glass primer that has entered the gap in the area where the adhesive in the vicinity does not spread When glass is bonded to the black ceramic on the glass surface and undergoes a certain temperature change, the glass primer may peel off the black ceramic due to the difference in thermal shrinkage between the adhesive and the glass primer. It was. Such peeling of the black ceramic is not preferable because the glass appears to be broken when viewed from the outside of the vehicle.
This problem can be solved by adopting a wide and careful application form such as pre-applying an adhesive around the protrusions, but this is not preferable because it reduces the work efficiency.

Japanese Utility Model Publication No. 6-8023 JP 2008-127439 A

  Therefore, a main problem of the present invention is to provide an adhesion method that can favorably adhere the entire adhesion surface with an adhesive without deteriorating the efficiency of adhesion work, while maintaining the thickness of the adhesive favorably.

The present invention that has solved the above problems is as follows.
<Invention of Claim 1>
A spacer for positioning that has three or more protrusions spaced apart in the circumferential direction on the periphery of the bonding surface is coated with an adhesive on the bonding surface, and then pressed against the black ceramic part of the automobile glass. It is an adhesion method that spreads and adheres between the adhesion surface and the automobile glass,
The spacer has the protrusion at a position satisfying the relationship of s> 0.9d, where s is the minimum separation distance between the protrusion and the peripheral edge of the adhesive surface, and the long diameter of the protrusion is d.
The application area of the adhesive is an area excluding the gap between the peripheral edge and the protrusion on the adhesive surface,
Applying the adhesive such that the total application amount is greater than the product of the height of the protrusion and the area of the adhesive surface;
A method for adhering a spacer for positioning in an automobile glass.

(Function and effect)
The present invention not only simply provides protrusions on the adhesive surface, but also separates the position sufficiently inward from the periphery of the adhesive surface to ensure the wraparound distance of the adhesive, and the adhesive application area on the adhesive surface. The application work is facilitated as a region excluding the gap between the peripheral edge and the protrusion, and the adhesive is applied in an amount that reliably protrudes from the entire peripheral edge of the bonding surface. As a result, while maintaining ease of application, the adhesive wraps around both sides of the projections and merges, and evenly protrudes from the entire periphery of the adhesive surface. No gap is formed between the glass surface. As a result, while the thickness of the adhesive can be maintained due to the presence of the protrusions, it is possible to prevent the black ceramic from peeling off due to the penetration of the glass primer when the automobile glass is attached to the vehicle body.

<Invention of Claim 2>
The spacer has a shape in which the adhesion surface is rectangular with four corners rounded into a circular arc with a predetermined radius of curvature,
The adhesive surface is a rectangle having a longitudinal length of 5.0 to 50.0 mm and a lateral length of 10.0 to 100 mm, and the protrusions are provided near the four corners of the adhesive surface. It is provided between each projection near the four corners and the central part in the longitudinal direction,
When the lateral length of the adhesive surface is x, the longitudinal length is y, and the curvature radius is r, the following relational expression is satisfied:
y / 4 ≦ r ≦ y / 2 (1)
y / 4>s> y / 7 (2)
The adhesive is bead-applied along the lateral direction at the longitudinal center of the adhesive surface, and at the time of application, a separation distance between both ends of the bead and a position where the extension line intersects the peripheral edge of the adhesive surface is set. , Apply so that the distance between the bead and the lateral edge is less than
A method for bonding a positioning spacer in an automobile glass according to claim 1.

(Function and effect)
The problems of equalizing the adhesive thickness and insufficient adhesive wrapping described above are significant problems when beads are applied to a horizontally long spacer. Therefore, the present invention is suitable in such a case, and in that case, it is particularly preferable that the size / shape of the spacer and the bead coating region are as described above.

<Invention of Claim 3>
The adhesion method of the spacer for positioning in the motor vehicle glass of Claim 1 or 2 whose SOD viscosity of the said adhesive agent is 30-80 Pa.s.

(Function and effect)
The viscosity of the adhesive can be determined as appropriate, but is preferably in the above range in consideration of viscoelasticity and workability until curing.

  As described above, according to the present invention, although the thickness of the adhesive can be maintained satisfactorily, the entire bonding surface can be satisfactorily bonded with the adhesive without a decrease in the bonding work efficiency, and thus after the vehicle body is mounted. Advantages such as prevention of peeling of the black ceramic are brought about.

It is a perspective view which shows automobile glass. It is a perspective view of the spacer for positioning. It is a bottom view of the spacer for positioning. It is a bottom view of the spacer for positioning which shows the application state of an adhesive agent. It is a principal part enlarged view which shows how the adhesive agent spreads. It is sectional drawing which shows a vehicle body attachment state. It is a photograph of each step of the experiment.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 shows an example of an automobile glass G. This automobile glass G is provided with a black ceramic print C on its peripheral edge as is often seen in a front window glass and a rear window glass, and is positioned at predetermined positions C1 and C2 in the black ceramic print portion C. The spacer 10 is bonded. The automobile glass G may have a flat bonding surface C1 or C2, but may have a three-dimensional curved surface. The latter case is particularly suitable for the present invention because it is difficult to keep the thickness of the adhesive uniform.

  2 and 3 show a tenth example of the positioning spacer (clip) for the front window glass. As can be seen from FIG. 6, the positioning spacer 10 protrudes from the center of the substrate portion 11 to the indoor side and is attached to the glass G to the mounting hole 12 of the automobile body. It is a component having a latching projection 13 to be latched, and the bottom surface of the substrate portion 11 constitutes an adhesive surface 14. Although the material of the positioning spacer 10 can be determined as appropriate, engineering plastics such as polyester resin and polyamide resin can be suitably used.

  The dimension and shape of the positioning spacer 10 can be determined as appropriate. For front and rear window glass, the longitudinal length y is 5.0 to 50.0 mm, particularly 10.0 to 20.0 mm, and the lateral length x in order to provide sufficient glass support. Is in the range of 10.0 to 100 mm, particularly 20.0 to 80.0 mm, and x> 2y, and has an oblong adhesive surface 14. In the case of such a horizontally long shape, the four corners are preferably rounded in an arc shape, and the curvature radius r in that case is preferably y / 4 or more and y / 2 or less.

  Protrusions 15 are juxtaposed on the peripheral edge of the bonding surface 14 of the positioning spacer 10 at intervals in the circumferential direction. Although the shape of the protrusion 15 can be determined as appropriate, it is preferable that the protrusion 15 has a spherical shape in that it can satisfactorily come into contact with the curved glass. Although the dimension of the protrusion 15 can be determined as appropriate, if the long diameter (the diameter of the longest part) d of the protrusion 15 is excessively large, the wraparound distance of the adhesive B becomes long. Is preferred. Moreover, although the height h of the protrusion 15 can be appropriately determined according to the thickness of the adhesive to be maintained, it is usually preferably about 0.2 to 1.0 mm.

  The position of the protrusion 15 is sufficiently inwardly spaced from the periphery of the bonding surface 14 so that the adhesive B surely wraps around both sides and merges. That is, the relationship of s> 0.9d is satisfied, where s is the minimum separation distance between the protrusion 15 and the periphery of the bonding surface 14 (the separation distance in the direction in which the separation distance is minimum), and d is the major diameter of the protrusion. A protrusion 15 is provided at the position. A position that satisfies the relationship of s> 1.2d is more preferable.

  Specifically, when the above dimensional conditions are satisfied, the protrusions 15 are provided in the vicinity of the four corners of the bonding surface 14, and protrusions are also provided between the protrusions 15 in the vicinity of the four corners and the central portion in the longitudinal direction. Thereby, it can be made to contact stably with respect to the glass G surface, and the attitude | position of the spacer for positioning can be stabilized. In that case, the aforementioned separation distance s is preferably larger than y / 7 and smaller than y / 4.

  In bonding, spacer primer P1 is applied to the entire bonding surface 14 of the positioning spacer 10, and adhesive B is applied to a predetermined portion of the bonding surface 14, and then pressed against the black ceramic portion C of the automobile glass G. Adhesive B is spread and adhered between the adhesive surface 14 of the spacer 10 and the automobile glass G. At this time, the application area of the adhesive B is an area excluding the periphery of the bonding surface 14 and the protrusion 15 so that the adhesive can be easily applied. In particular, as shown in FIG. 4, bead coating is preferably performed along the longitudinal direction of the bonding surface 14. Specifically, in the case of a horizontally long adhesive surface 14 as illustrated, the adhesive B is separated from the bead B by a separation distance j between the both ends of the bead B and the position where the extension line intersects the periphery of the adhesive surface 14. It is particularly preferable to bead-apply along the horizontal direction at the center in the vertical direction of the bonding surface 14 so that the distance k from the horizontal edge is equal to or less. A particularly preferable bead coating length is 0.9 × k ≦ j ≦ 0.2 × k. When performing bead application, the application width (thickness) w of the bead B can be determined as appropriate, but is preferably about 3 to 10 mm, particularly about 4 to 8 mm.

  The total application amount of the adhesive B is made larger than the product of the height h of the protrusion 15 and the area of the bonding surface 14 (substantially equal to the volume of the gap between the bonding surface 14 and the glass G surface). Thereby, when crimping | bonding with respect to the glass G, the adhesive agent B can be reliably made to protrude from the whole periphery of the adhesion surface 14. FIG.

  When the automobile glass G in which the positioning spacer 10 is bonded to the black ceramic portion C is attached to the vehicle body, a glass primer P2 is applied to a portion adjacent to or adjacent to the positioning spacer 10, and the primer application portion is as shown in FIG. It adheres to the vehicle body via an adhesive 20 for direct glazing. As this glass primer, an isocyanate-containing primer or the like can be used. In addition, the code | symbol 21 in FIG. 6 has each shown the dam sea run rubber.

  By adhering the positioning spacer 10 as described above, the adhesive B applied to the adhesive surface 14 is maintained while maintaining the ease of application work, as shown by the two-dot chain line in FIGS. 4 and 5A. While merging around both sides of the protrusion 15, the protrusion 15 uniformly protrudes from the entire periphery of the bonding surface 14, and no gap is formed between the periphery of the bonding surface 14 and the surface of the automobile glass G. As a result, while the thickness of the adhesive B can be maintained due to the presence of the protrusions 15, it is possible to prevent the black ceramic from peeling due to the penetration of the glass primer when the automobile glass G is attached to the vehicle body. On the other hand, as shown in FIG. 5 (b), in a state where the adhesive B completely wraps around the protrusion 15 and cannot be merged, it is branched into two hands, and each branch portion is once from the peripheral portion 14 of the bonding surface. If it sticks out after that, no matter how much it is pressed, the two branch portions cannot merge, and a gap 15s is formed between the outer peripheral portion of the adhesive surface 14 and the surface of the automobile glass G from the outside. When such a gap is formed, when the automobile glass G is attached to the vehicle body, the glass primer enters the gap 15s, and the positioning spacer 10 and the black ceramic C on the surface of the glass G are bonded together by the glass primer. End up. As can be seen from these comparisons, it is important that the minimum separation distance s between the protrusion 15 and the peripheral edge of the adhesive surface 14 is longer than the minimum separation distance s1 between the protrusion 15 and the joining point of the adhesive. The condition s> 0.9d corresponds to the relationship between s and s1.

  On the other hand, as an adhesive B for adhering the positioning spacer to the glass G and an adhesive 20 for adhering the automobile glass and the automobile body, there are known epoxy-type, urethane-type, silicone-type, modified silicone-type, etc. An adhesive can be used, and it can be used regardless of one-pack type or two-pack type. Since various vibrations are applied to the automobile, a relatively soft adhesive is preferable, and urethane and silicone are particularly preferable.

  In particular, the SOD viscosity of the adhesive B for adhering the positioning spacer to the glass G is preferably 30 to 80 Pa · s, and particularly preferably 60 to 70 Pa · s. If it is an adhesive of such a viscosity range, the effect of this invention will be exhibited fully.

  In order to examine the relationship between the diameter d of the protrusion and the minimum separation distance s1 between the protrusion 15 and the joining point of the adhesive B, the following experiment was performed. FIG. 7 is a photograph of each step of the experiment. First, as shown in FIG. 7 (a), a lower plate 30 having a flat upper surface and having a round bar 31 (diameter 1.8 mm) as if projecting 15 is projected vertically from the upper surface is prepared. Adhesive B was applied to one side of the round bar 31 on the upper surface of the lower plate 30. As the adhesive B, Hamatite manufactured by Yokohama Rubber Co., Ltd. was used. The thickness of the adhesive B was 6.0 mm, the coating length was 30 mm, and the center of the bead in the longitudinal direction was perpendicular to the radial direction of the round bar 31. As shown in FIG. 7B, an upper plate 32 having a through hole having the same diameter as the round bar 31 and having a flat bottom surface is prepared, and the round bar protruding from the lower plate 30 into the through hole of the upper plate 32. 31 is inserted, the upper plate 32 is lowered to the upper surface of the lower plate 30, and the upper plate 32 and the lower plate 30 are moved until the adhesive B wraps around the round bar 31 and joins as shown in FIG. 7C. The adhesive B was crushed between. At this time, the minimum separation distance s1 between the protrusion 15 and the joining point of the adhesive B was measured with a ruler. Table 1 shows the results of performing this test 10 times. From the table, the maximum value of the minimum separation distance s1 is 1.6 mm, and the ratio of this to the diameter d of the projection d = 1.8 mm is 1.6 / 1.8 = 0.88≈0.9. Become. Therefore, from this result, it was estimated that the adhesive B wraps around the protrusion 15 and reliably joins if the minimum separation distance s between the protrusion 15 and the peripheral edge of the bonding surface is greater than 0.9d.

Samples similar to those shown in FIGS. 2 and 3 were made.
The longitudinal length y of the adhesive surface 14 was 14 mm, the lateral length x was 40 mm, the radius of curvature of the chamfering was 7.0 mm, and the protrusion 15 was a spherical spherical shape with a diameter d of 1.8 mm. The minimum separation distance s between the protrusion 15 and the periphery of the adhesive surface 14 was 2.77 mm for four corners and 2.15 mm for four points near the center in the longitudinal direction. Hereinafter, this is referred to as sample A.

  A sample A was prepared in which the position of the protrusion 15 was moved in the vertical direction so that the minimum separation distance s was 0 mm. Hereinafter, this is referred to as sample B.

  Adhesive B was bead-coated along the lateral direction as shown in FIG. 4 at the center in the longitudinal direction of the adhesion surface of these samples, and then pressed and adhered to the flat glass surface until the protrusions 15 contacted. As the adhesive B, Hamatite manufactured by Yokohama Rubber Co., Ltd. was used. A circular nozzle was used to apply the adhesive B. The width w of the adhesive was applied with a target of 4 mm and 6 mm. The application conditions (j, k: see FIG. 4) were changed to evaluate whether or not the adhesive B wraps around the protrusion and merges.

  The coating conditions and evaluation results are shown in Table 2. In the evaluation results of Table 2, ○ indicates that the adhesive B wraps around all the protrusions 15 as shown by a two-dot chain line in FIG. X means that the adhesive does not merge in the projection 15 while being separated into two hands, but protrudes from the peripheral portion of the adhesive surface and communicates between the peripheral portion of the adhesive surface and the glass surface from the outside. This means that there is a gap formed. In the case where the distance from the protrusion of the adhesive around the protrusion was 2 mm (y / 7) or more, the evaluation was “good”.

  Further, the development radius r1 of the adhesive at the corner was measured as follows. That is, with respect to the peripheral edge of the adhesive B at each corner of the sample, as shown in FIG. 4, the tangent line L1 parallel to the lateral direction and in contact with the peripheral edge of the adhesive, and the peripheral edge of the adhesive parallel to the vertical direction. A tangent line L2 is defined, and a distance rx between a contact point between the tangent line L1 and the peripheral edge of the adhesive and an intersection point between the tangent line L1 and the tangent line L2 is measured, and a contact point between the tangent line L2 and the peripheral edge of the adhesive is measured. And the distance ry between the intersection point and the tangent L2 is measured, and an average ra ((rx + ry) / 2) is obtained, and an average of all corners is set to r1 (4ra / 4).

  The results are shown in Table 2. From the table, it can be seen that the adhesive development radius r1 is between (1/2) y and (1/4) y. Therefore, if the radius of curvature r of the four corners of the rectangular bonding surface is an appropriate radius between them, the adhesive can cover the bonding surface.

  The present invention can be used when a positioning spacer (clip) is attached to a black ceramic portion of an automobile glass.

  DESCRIPTION OF SYMBOLS 10 ... Positioning spacer, 14 ... Adhesive surface, 15 ... Protrusion, 20 ... Adhesive, 21 ... Dam sea run rubber, G ... Front window glass for motor vehicles, C ... Black ceramic, B ... Adhesive.

Claims (3)

A spacer for positioning that has three or more protrusions spaced apart in the circumferential direction on the periphery of the bonding surface is coated with an adhesive on the bonding surface, and then pressed against the black ceramic part of the automobile glass. It is an adhesion method that spreads and adheres between the adhesion surface and the automobile glass,
The spacer has the protrusion at a position satisfying the relationship of s> 0.9d, where s is the minimum separation distance between the protrusion and the peripheral edge of the bonding surface, and the long diameter of the protrusion is d.
The application area of the adhesive is an area excluding the gap between the peripheral edge and the protrusion on the adhesive surface,
Applying the adhesive such that the total application amount is greater than the product of the height of the protrusion and the area of the adhesive surface;
A method for adhering a spacer for positioning in an automobile glass. The spacer has a shape in which the adhesion surface is rectangular with four corners rounded into a circular arc with a predetermined radius of curvature,
The adhesive surface is a rectangle having a longitudinal length of 5.0 to 50.0 mm and a lateral length of 10.0 to 100 mm. The protrusions are provided in the vicinity of the four corners of the adhesive surface. It is provided between each protrusion in the vicinity and the central part in the longitudinal direction,
When the lateral length of the adhesive surface is x, the longitudinal length is y, and the curvature radius is r, the following relational expression is satisfied:
y / 4 ≦ r ≦ y / 2 (1)
y / 4>s> y / 7 (2)
The adhesive is bead-applied along the lateral direction at the longitudinal center of the adhesive surface, and at the time of application, a separation distance between both ends of the bead and a position where the extension line intersects the peripheral edge of the adhesive surface is set. , Apply so that the distance between the bead and the lateral edge is less than
A method for bonding a positioning spacer in an automobile glass according to claim 1.   The adhesion method of the spacer for positioning in the motor vehicle glass of Claim 1 or 2 whose SOD viscosity of the said adhesive agent is 30-80 Pa.s.

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