JP3978045B2 - Bending tempered glass joined with transparent resin plate - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bent tempered glass made of a laminate of a tempered glass plate and a transparent resin plate, for example, joined with a transparent resin plate used as a window glass for a front door of a vehicle.
[0002]
[Prior art]
Conventionally, as a tempered glass to which a transparent resin plate is bonded, a curved laminated window obtained by a method of laminating a plastic material disclosed in JP-A-48-38372 on a hard transparent material is known. This curved laminated window is formed by laminating a glass sheet as a tempered glass plate and a thermoplastic resin sheet as a transparent resin plate.
[0003]
The laminated curved window is used, for example, as a window glass for a front door of a vehicle. An opening that is opened and closed by a window glass is formed in a front door of a vehicle to which the laminated curved window is attached. The window frame provided along the opening of the front door is formed in a substantially U-shaped cross section as a whole, and a rubber glass run having a substantially U-shaped cross section is attached along the extending direction of the window frame. Yes.
[0004]
The curved laminated window is attached to the front door so that the glass sheet is exposed to the outer surface side of the car and the thermoplastic resin sheet is exposed to the vehicle interior side, and the window can be moved up and down to open and close the opening. It has been. Further, when the opening is closed by the curved laminated window, the peripheral edge of the curved laminated window enters the inside of the glass run of the window frame.
[0005]
[Problems to be solved by the invention]
However, the conventional curved laminated window is formed by joining and laminating a glass sheet pre-formed to be bent and a thermoplastic resin sheet pre-bent to be the same shape as the glass sheet. Yes. Therefore, the total value of the impact strength of the glass sheet and the impact strength of the thermoplastic sheet is the impact strength of the curved laminated window, and there is a problem that the impact resistance of the glass sheet is particularly low. In addition, since the thermoplastic resin sheet is previously formed in the same shape as the glass sheet, there is a problem that when the glass sheet is broken and broken down, the thermoplastic resin sheet remains in a curved state. It was.
[0006]
As a result, when the curved laminated window is attached to the front door of the vehicle, if an impact is applied from the outer surface side of the curved laminated window, the glass sheet having low impact resistance is easily broken. It was. Further, when the glass sheet breaks and breaks down, the thermoplastic resin sheet remains in a curved state, so that the peripheral edge portion of the thermoplastic resin sheet enters in a state inclined to the vehicle cabin side in the glass run. . Therefore, when an impact is further applied from the outer surface side of the thermoplastic resin sheet, the thermoplastic resin sheet is easily detached from the inner side of the glass run, and the opening of the front door may be opened.
[0007]
The present invention has been made paying attention to the problems existing in the above-described prior art. The purpose of this is to bend tempered glass joined with a transparent resin plate that can increase the impact strength of the tempered glass plate and return the transparent resin plate to a flat shape when the tempered glass plate is damaged. It is to provide.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the invention according to claim 1 is a laminate formed by joining a tempered glass plate bent in advance and a transparent resin plate having a flat plate shape, and the transparent By joining the resin plate in an elastically deformed state along the tempered glass plate, the force of the transparent resin plate trying to return to the flat plate shape from the elastically deformed state in the laminate is applied to the tempered glass plate , The laminate includes a sandwiching tool that sandwiches a peripheral edge of the laminate, and a lower surface of the sandwiching tool includes an extending portion that extends in a plate shape from an end on the side where the transparent resin plate is elastically deformed. It is a summary.
[0010]
According to a second aspect of the invention, the bending tempered glass bonding the transparent resin plate according to claim 1, wherein the end face protection process at the peripheral portion of the laminated body is subjected, the end face which has been subjected by the end face protection process The gist is that the surface of the protective material is formed to have a circular arc cross section .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment in which a bending tempered glass to which a transparent resin plate of the present invention is bonded is embodied in a window glass of a front door of an automobile will be described with reference to FIGS.
[0012]
As shown in FIG. 1, the window glass 11 is formed by joining a tempered glass plate 12 bent in advance in an arc shape when viewed from the side and a transparent resin plate 13 having a flat plate shape by a transparent adhesive resin sheet 14. The laminated body 10 is made up of.
[0013]
As the tempered glass plate 12, a tempered glass that has been bent into a gentle arc by a self-weight bending method, a press bending method, an air forming method, or the like is used. In addition, in the side view of the tempered glass plate 12, the right side surface in FIG. 1 is one surface (concave surface) that is recessed leftward in FIG. 1 as one side of the tempered glass plate 12, and the left side surface in FIG. The other surface (convex surface) of the tempered glass plate 12 swells to the left. Moreover, you may use the tempered glass board 12 which gave films | membranes, such as a heat | fever reflective film, an electroconductive film, and a colored film. The tempered glass plate 12 preferably has a thickness of 3.5 to 5 mm.
[0014]
As the transparent resin plate 13, a plate made of a thermoplastic resin material such as polycarbonate, methacrylate, polyvinyl chloride, polyurethane or the like is used. Among the thermoplastic resin materials, polycarbonate is a material having a high impact absorption capacity and higher impact strength than glass and can be obtained at low cost. Therefore, it is preferable to form the transparent resin plate 13 from polycarbonate. The thickness of the transparent resin plate 13 is preferably 2 to 3 mm in order to effectively exhibit the impact resistance.
[0015]
The transparent adhesive resin sheet 14 uses a trade name “Clear Fit” manufactured by Mitsubishi Plastics, Inc., and has a thickness of 0.5 mm. As shown in FIG. 5, when the transparent adhesive resin sheet 14 is not used, release films 14 a are attached to both surfaces of the transparent adhesive resin sheet 14. Moreover, as the transparent adhesive resin sheet 14, in addition to the above-mentioned clear fit, an adhesive formed by joining polyvinyl butyral, ethylene-vinyl acetate copolymer (EVA), urethane resin and silicone resin by heating and pressing. A functional resin material may be used.
[0016]
And as shown in FIG. 1, the window glass 11 is the laminated body joined by the transparent adhesive resin sheet 14 in the state by which the said transparent resin board 13 was elastically deformed along the circular arc of the concave surface of the said tempered glass board 12. 10. In the laminated body 10, a force is applied to the transparent resin plate 13 to return to a flat plate shape from the state of being elastically deformed in an arc shape, and the force of the transparent resin plate 13 is applied to the tempered glass plate 12.
[0017]
In the laminate 10, the tempered glass plate 12 is flattened from a circular arc shape to the convex surface side of the tempered glass plate 12 by the force of the elastically deformed transparent resin plate 13, that is, the surface where the transparent resin plate 13 is not joined. The force which tries to make it deform | transform into a shape is acting. Therefore, a stress that compresses the convex surface side acts on the convex surface side of the tempered glass plate 12, and a stress that pulls the concave surface acts on the concave surface side of the tempered glass plate 12.
[0018]
Therefore, compared with the case where the transparent resin plate 13 bent and deformed in advance is joined to the concave surface of the tempered glass plate 12, the impact resistance on the convex surface side of the tempered glass plate 12 is enhanced. On the other hand, on the concave surface side of the tempered glass plate 12, the impact is supported by the transparent resin plate 13 by joining the transparent resin plate 13 to the concave surface via the transparent adhesive resin sheet 14.
[0019]
As shown in FIG. 2, holding tools 15 are attached to both end portions of the lower end edge of the laminate 10 having the above-described configuration. As shown in FIG. 3, each holding tool 15 has a substantially U-shaped side sectional view made of a synthetic resin material, and includes a holding part 15 a into which the edge of the laminate 10 can be inserted. Moreover, in the clamping tool 15, the extension part 15b extended in plate shape from the lower surface of the clamping part 15a is formed. And the said clamping tool 15 is the adhesive 15c applied between the inner surface of the said clamping part 15a, and both surfaces of the laminated body 10 in the state in which the lower end edge of the laminated body 10 was inserted inside the clamping part 15a. It is joined to the laminated body 10 by this.
[0020]
Silicone 17 for polycarbonate is applied to the peripheral portion of the laminate 10, and end face protection treatment is applied to the peripheral portion of the laminate 10. The polycarbonate silicone 17 is applied over the periphery of each of the tempered glass plate 12, the transparent resin plate 13 and the transparent adhesive resin sheet 14.
[0021]
As shown in FIG. 2, the window glass 11 is attached and supported at the lower end edge of the laminated body 10 by attaching the holding tool 15 to a support member (not shown) provided on the front door 19. Yes. Moreover, the window glass 11 is provided in the front door 19 so that raising / lowering is possible so that the opening part 19a of the front door 19 of a vehicle may be opened and closed. Moreover, as shown in FIG. 3, in the installation state with respect to the front door 19 of the window glass 11, the convex surface of the tempered glass plate 12 is exposed to the outer surface side of the vehicle, and the transparent resin plate 13 is exposed to the vehicle interior side. It has become.
[0022]
The window frame 20 provided along the opening 19a of the front door 19 has a substantially U-shaped cross section as a whole, and the mounting groove 20a formed along the direction in which the window frame 20 extends has a substantially cross-sectional shape. A rubber glass run 21 having a letter shape is attached. The glass run 21 has seal lips 21a and 21b extending on opposite inner surfaces thereof, and the window glass 11 is slidably inserted between the seal lips 21a and 21b. The
[0023]
Next, the manufacturing method of the window glass 11 is demonstrated.
First, under the conditions of room temperature 20 ± 5 ° C. (range of 5 ° C. before and after 20 ° C.), as shown in FIG. 5, one side of the transparent adhesive resin sheet 14 is formed on one side of the transparent resin plate 13 having a flat plate shape. Arrange the faces to correspond. Next, the transparent resin plate 13 and the transparent adhesive resin sheet 14 are passed between the pair of nip rolls 30 while peeling the release film 14 a on one surface of the transparent adhesive resin sheet 14. At this time, the passing speed between the transparent resin plate 13 and the transparent adhesive resin sheet 14 between the nip rolls 30 is set to 0.5 m / min, and the linear pressure between the pair of nip rolls 30 is set to 0.88 MPa (9.0 kgf / cm ² ). Is preferred. As a result, one surface of the transparent adhesive resin sheet 14 is pressure-bonded to one surface of the transparent resin plate 13 having a flat plate shape, and the transparent resin plate 13 and the transparent adhesive resin sheet 14 are laminated.
[0024]
Next, as shown in FIG. 6, it arrange | positions so that the other surface of the transparent adhesive resin sheet 14 may respond | correspond to the concave surface of the tempered glass board 12 previously bent and formed in circular arc shape. Next, the tempered glass plate 12 and the transparent adhesive resin sheet 14 are passed between the pair of nip rolls 30 while peeling the release film 14 a on the other surface of the transparent adhesive resin sheet 14. Also at this time, the passing speed between the tempered glass plate 12, the transparent resin plate 13, and the transparent adhesive resin sheet 14 between the nip rolls 30 is set to 0.5 m / min and a linear pressure of 0.88 MPa (9.0 kgf / cm ² ). Is preferred.
[0025]
Then, as the transparent adhesive resin sheet 14 is crimped along the concave surface of the tempered glass plate 12, the transparent resin plate 13 crimped to the transparent adhesive resin sheet 14 is elastic along the arc of the tempered glass plate 12. It is crimped to the tempered glass plate 12 while being deformed. As a result, the transparent resin plate 13 is pressure-bonded to the tempered glass plate 12 in a state in which a force for returning to the original flat plate shape from the state in which the transparent resin plate 13 is elastically deformed in an arc shape, and the laminate 10 is pressed. The window glass 11 is manufactured.
[0026]
In addition, in each process which manufactures the window glass 11, the passage speed between the nip rolls 30, linear pressure, room temperature, etc. are not limited to the said setting, The transparent resin board 13, the transparent adhesive resin sheet 14, and the transparent adhesive resin sheet 14 As long as the conditions are such that the tempered glass plate 12 and the tempered glass plate 12 are pressure bonded, they may be changed as appropriate. In particular, the linear pressure is changed depending on the surface accuracy of the tempered glass plate 12.
[0027]
Next, as shown in FIG. 3, end face protection treatment is performed by applying polycarbonate silicone 17 to the peripheral edge of the laminate 10. Subsequently, both outer surfaces of both side portions in the length direction of the lower end edge of the laminate 10 and the inner surfaces of the clamping portions 15a of the respective clamps 15 are joined by the adhesive 15c, and the pair of clamps 15 are joined to the laminate 10. Attach to. Then, both side parts of the lower end edge part of the laminated body 10 are clamped by the clamping part 15a. Furthermore, the window glass 11 is attached to the front door 19 of the vehicle so as to be movable up and down.
[0028]
Next, the operation of the obtained window glass 11 will be described.
Since the window glass 11 is formed by joining the tempered glass plate 12 and the transparent resin plate 13 with the transparent adhesive resin sheet 14, the weight is reduced from the laminated glass formed by joining the tempered glass plates 12 together. The Further, when the window glass 11 is exposed to a high temperature state and the transparent resin plate 13 is thermally expanded, the transparent adhesive resin sheet 14 extends following the transparent resin plate 13. Therefore, the joining state of the tempered glass plate 12 and the transparent resin plate 13 by the transparent adhesive resin sheet 14 is maintained.
[0029]
Now, as shown in FIG. 3, the opening 19 a of the front door 19 of the vehicle is closed by the window glass 11, and the peripheral edge of the window glass 11 is inserted between the opposed seal lips 21 a and 21 b of the glass run 21. It is assumed that an impact is applied to the window glass 11 from the outside in the state where it is applied.
[0030]
At this time, on the convex surface side of the tempered glass plate 12, the stress in the compression direction is applied by the force of the transparent resin plate 13 and the impact resistance is enhanced. Further, the polycarbonate forming the transparent resin plate 13 has high impact resistance, and the impact acting on the tempered glass plate 12 is supported by the transparent resin plate 13. Therefore, the tempered glass plate 12 is not easily broken by an impact and is prevented from being easily broken.
[0031]
In the unlikely event that the tempered glass plate 12 is broken due to impact and cracked, the transparent resin plate 13 retains the plate shape without breaking and is crushed into a transparent adhesive resin sheet 14 that is crimped to the transparent resin plate 13. The remaining glass piece remains pressed. Therefore, the glass pieces are not scattered and are not dropped from the front door 19.
[0032]
Further, when the glass piece is dropped from the transparent adhesive resin sheet 14 and the bonding of the transparent resin plate 13 to the tempered glass plate 12 through the transparent adhesive resin sheet 14 is lost, the state is elastically deformed in an arc shape. It returns to the original flat plate shape by the force of returning to the flat plate shape. That is, as shown by a two-dot chain line in FIG. 4, the transparent resin plate 13 curved toward the vehicle interior side is deformed into a flat plate shape as shown by a solid line in FIG. As a result, the transparent resin plate 13 is locked to the inside of the glass run 21, that is, the inner part of the mounting groove 20 a as compared with the state in which the transparent resin plate 13 is curved toward the vehicle interior side, and is firmly attached to the inner side surface of the glass run 21 on the vehicle outer surface side. Lock to.
[0033]
Therefore, even if an impact is further applied to the transparent resin plate 13 that has returned to the flat plate shape, the peripheral portion of the transparent resin plate 13 is made of glass compared to the case where the transparent resin plate 13 is bent into an arc shape. It becomes difficult to come off easily from the run 21.
[0034]
According to the window glass 11 of the said embodiment, the following characteristics can be acquired.
(1) The window glass 11 is formed by bonding a flat transparent resin plate 13 to the concave surface of the tempered glass plate 12 while elastically deforming the plate in a circular arc shape. Therefore, stress that compresses the convex surface acts on the convex surface side of the tempered glass plate 12 by the force of the transparent resin plate 13 that tries to return to the flat plate shape from the elastically deformed state. Therefore, compared with the case where the transparent resin plate 13 that has been bent and deformed in advance is joined to the tempered glass plate 12, the impact strength on the convex surface side of the tempered glass plate 12 can be increased, and the window glass 11 can be easily formed. It can be made difficult to break or break.
[0035]
(2) In the unlikely event that the tempered glass plate 12 is cracked, the transparent resin plate 13 returns to a flat plate shape from the state of being elastically deformed in an arc shape. As a result, when the window glass 11 is attached to the front door 19 of the vehicle, the transparent resin plate 13 can be firmly locked to the glass run 21. Therefore, unlike the conventional case where the transparent resin plate 13 is bent in advance, the risk that the transparent resin plate 13 is easily detached from the glass run 21 when a further impact is applied to the transparent resin plate 13 can be eliminated.
[0036]
(3) When the tempered glass plate 12 is broken, the transparent resin plate 13 is firmly locked inside the glass run 21 by returning to the flat plate shape from the elastically deformed state. Therefore, the opening 19a of the front door 19 is closed by the transparent resin plate 13, so that the opening 19a is not easily opened, and crime prevention can be improved.
[0037]
(4) Since the polycarbonate forming the transparent resin plate 13 is a material having high impact resistance among the transparent resin materials, the window glass 11 is broken by supporting the impact acting on the tempered glass plate 12 by the transparent resin plate 13. Can be difficult. Moreover, since the said polycarbonate can be obtained cheaply, manufacturing cost can be restrained compared with the case where the window glass 11 is manufactured with the laminated glass which joined glass.
[0038]
(5) The window glass 11 is formed by joining the tempered glass plate 12 and the transparent resin plate 13, and the polycarbonate forming the transparent resin plate 13 is a material having higher impact resistance than glass. Therefore, in order to improve the impact resistance of the window glass 11, the weight and thickness of the window glass 11 can be suppressed as compared with the case where the thickness of the laminated glass is increased. Therefore, it is not necessary to change the front door 19 and the lifting device so as to correspond to the weight and thickness of the laminated glass, and the change work can be easily performed while slightly changing the parts.
[0039]
(6) Since the sandwiching tool 15 is attached to both sides of the lower edge of the window glass 11, and the laminated body 10 is sandwiched by the sandwiching part 15a of each sandwiching tool 15, the tempered glass plate 12 and the transparent resin plate 13 are used. Can be prevented. Further, the window glass 11 can be easily attached to the front door 19 by using the holding tool 15.
[0040]
(7) The peripheral surface of the window glass 11 is subjected to end face protection treatment with polycarbonate silicone 17. Therefore, it is possible to prevent a problem that moisture penetrates between the tempered glass plate 12 and the transparent resin plate 13 by the polycarbonate silicone 17. Accordingly, it is possible to prevent the adhesive force from being lowered due to moisture absorption by the transparent adhesive resin sheet 14 and maintain the bonding between the tempered glass plate 12 and the transparent resin plate 13. Further, the end surface of the window glass 11 can be protected by the polycarbonate silicone 17.
[0041]
In addition, you may change the said embodiment as follows.
In the embodiment, the end face treatment of the window glass 11 is performed using the polycarbonate silicone 17, but a soft or high-viscosity liquid rubber composition such as a sealant may be applied to the peripheral portion of the laminate 10. Or you may stick a moisture-proof tape to the peripheral part of the laminated body 10, and perform an end surface protection process to the window glass 11. FIG.
[0042]
-In embodiment, although a pair of clamping tool 15 was joined to the laminated body 10 with the adhesive agent 15c, and it attached to the window glass 11, you may change as follows. For example, after the clamping tool 15 is attached to the laminate 10 with the adhesive 15c, the clamping part 15a may be further tightened with screws. Alternatively, the holding tool 15 is formed of a metal material, and an interposed member made of a rubber material is interposed between the inner surface of the holding portion 15a and the outer surface of the lower end edge of the laminated body 10, and the holding portion 15a, the interposed member, and The clamping tool 15 may be attached to the laminated body 10 by tightening a screw penetrating the laminated body 10. In addition, it is good also as the clamping tool 15 which consists only of the clamping part 15a which abbreviate | omitted the extension part 15b.
[0043]
In the embodiment, the window glass 11 of the front door 19 is embodied as a transparent resin plate laminated bending tempered glass. However, the windshield of the vehicle, the window glass of the rear door, the vehicle for construction, the window glass of the railway, and the building It may be embodied in a window glass or the like. In particular, by adopting the window glass 11 in a cash transport vehicle or the like, the crime prevention property of the cash transport vehicle can be enhanced.
[0044]
If the transparent resin plate 13 having a flat plate shape can be bonded to the pre-curved tempered glass plate 12, the tempered glass plate 12 and the transparent resin plate 13 are bonded by a method other than the transparent adhesive resin sheet 14. May be.
[0045]
Next, technical ideas that can be grasped from the above-described embodiment and other examples will be described below together with their effects.
(1) The transparent resin plate is bonded to one surface of a tempered glass plate that is bent and deformed so as to be recessed in one direction, and the tempered glass plate is caused by the force of the transparent resin plate to return to a flat shape from the elastically deformed state. the other, which is bent so as to expand to the one of the forming surface, bending tempered glass stress compressing the other side is joined to transparency resin plate you characterized in that it acts. When comprised in this way, the impact strength of the other surface of a tempered glass board, ie, the surface where the transparent resin board is not joined, can be raised.
[0046]
(2) the transparent resin plate is bent tempered glass bonding the transparency resin plate you characterized in that it is formed of polycarbonate. When configured in this way, among the transparent resin materials, polycarbonate is a material having high impact resistance, so that it can effectively support impacts acting on the tempered glass plate and make it difficult to break by impact. be able to.
[0047]
(3) One surface of the transparent adhesive resin sheet is bonded to a transparent resin plate having a flat plate shape, and the transparent adhesive resin sheet is formed along one surface formed so as to be recessed in a tempered glass plate that is bent in advance. As the other surface of the laminate was bonded, the transparent resin plate bonded to the transparent adhesive resin sheet was bonded while elastically deforming along the tempered glass plate to form a laminate, and the laminate was elastically deformed. The manufacturing method of the bending tempered glass which joined the transparent resin plate characterized by providing the force of the transparent resin plate which tries to return to a flat form from a state to a tempered glass plate. When comprised in this way, while improving the impact strength of a tempered glass board, a transparent resin board can be returned to flat form, when a tempered glass board is damaged.
[0048]
【The invention's effect】
As described in detail above, the present invention has the following effects.
According to invention of Claim 1, while being able to raise the impact strength of a tempered glass board, a transparent resin board can be returned to flat form when a tempered glass board is damaged.
[0049]
Moreover , peeling of the tempered glass plate and the transparent resin plate can be prevented.
According to the invention described in claim 2 , in addition to the effect of the invention described in claim 1, it is possible to prevent a problem that moisture permeates between the tempered glass plate and the transparent resin plate by the end face protection treatment. Accordingly, it is possible to maintain the bonding between the tempered glass plate and the transparent resin plate by preventing a decrease in the bonding force between the tempered glass plate and the transparent resin plate due to moisture.
[Brief description of the drawings]
FIG. 1 is a side sectional view showing a window glass of an embodiment.
FIG. 2 is a front view showing a front door to which a window glass is attached.
3 is a cross-sectional view taken along line 3-3 in FIG.
FIG. 4 is a side sectional view showing a window glass in which a tempered glass plate is broken.
FIG. 5 is a schematic diagram showing a state in which a transparent adhesive resin sheet is pressure-bonded to a transparent resin plate.
FIG. 6 is a schematic diagram showing a state in which a transparent resin plate is pressure-bonded to a tempered glass plate.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Laminated body, 11 ... Window glass as bending tempered glass which joined the transparent resin board, 12 ... Tempered glass board, 13 ... Transparent resin board, 15 ... Clamp, 17 ... Silicone for polycarbonate as an end surface protection process.

Claims (2)

It consists of a laminate formed by joining a tempered glass plate bent in advance and a transparent resin plate having a flat plate shape, and the transparent resin plate is joined in an elastically deformed state along the tempered glass plate. Thus, the force of the transparent resin plate that tries to return to the flat plate shape from the elastically deformed state in the laminated body is applied to the tempered glass plate, and the laminated body includes a sandwiching tool that sandwiches the peripheral portion of the laminated body. The bent tempered glass having a transparent resin plate joined thereto , wherein the lower surface of the clamping tool includes an extending portion extending in a plate shape from an end portion on the side where the transparent resin plate is elastically deformed . The peripheral surface of the laminated body is subjected to end face protection treatment, and the surface of the end face protection material subjected to the end face protection treatment is formed so as to form an arcuate cross section. Bending tempered glass with transparent resin plates bonded together.

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