Glass plate for vehicle, and method for manufacturing glass plate for vehicle

Abstract

To provide a glass plate for a vehicle which can appropriately mount an optical element onto a glass plate.SOLUTION: A glass plate for a vehicle includes a glass plate 10, and an optical element 21 where a first main surface 31 is disposed on a surface side of the glass plate 10. The optical element 21 is composed of a transparent resin material having softness, and light 71 introduced to the optical element 21 is introduced to the glass plate 10 through the optical element 21.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a glass plate for a vehicle and a method for manufacturing a glass plate for a vehicle. [Background technology]

[0002] In recent years, a technology has been developed in which light is introduced into the interior of a vehicle glass plate from an end side of the vehicle glass plate using a light source such as a light-emitting diode (LED), and the light is scattered on the surface or inside the vehicle glass plate to extract the light to the outside.

[0003] Patent Document 1 discloses a technique for attaching an optical element to a glass plate on the inside of a vehicle using an adhesive member. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2021 / 198262 Summary of the Invention [Problem to be solved by the invention]

[0005] When introducing light into a glass plate for a vehicle, an optical element is provided on the glass plate for a vehicle, and light emitted from a light source is introduced into the glass plate for a vehicle through the optical element. Patent Document 1 discloses a technique for attaching an optical element to a glass plate using an adhesive member.

[0006] However, when an optical element is provided on the surface of a glass plate, air bubbles may be trapped at the interface between the glass plate and the optical element. When air bubbles are trapped at the interface between the glass plate and the optical element, light may not be efficiently guided from the optical element to the glass plate. Therefore, a technology for appropriately attaching an optical element to the surface of a glass plate has been required.

[0007] In view of the above-mentioned problems, an object of the present disclosure is to provide a glass plate for a vehicle that allows an optical element to be appropriately attached to the glass plate, and a method for manufacturing the glass plate for a vehicle. [Means for solving the problem]

[0008] A glass plate for a vehicle according to one aspect of the present disclosure and a method for manufacturing the glass plate for a vehicle are as follows.

[0009] [1] A glass plate and an optical element having a first main surface disposed on the front surface side of the glass plate, the optical element is made of a soft, transparent resin material, The light introduced into the optical element is introduced into the glass plate via the optical element. Vehicle glass panels.

[0010] [2] The glass plate for a vehicle according to [1], wherein the optical element has a flexural modulus of 1,400 MPa or less.

[0011] [3] The glass plate for a vehicle according to [1], wherein the product of the flexural modulus (MPa) and the thickness (mm) of the optical element is 2,700 MPa·mm or less.

[0012] [4] The glass plate for a vehicle according to any one of [1] to [3], wherein the optical element is disposed so as to be in close contact with the glass plate.

[0013] [5] The glass plate for a vehicle according to any one of [1] to [4], wherein the optical element is bonded to the glass plate using an adhesive member.

[0014] [6] The glass plate for a vehicle according to any one of [1] to [5], wherein the optical element is made of a resin material containing 10% by mass or more and 50% by mass or less of a plasticizer.

[0015] [7] The glass plate for a vehicle according to any one of [1] to [6], wherein the optical element is made of polyvinyl chloride.

[0016] [8] The refractive index of the glass plate is 1.48 or more and 1.56 or less, The refractive index of the optical element is 1.46 or more and 1.58 or less. The glass plate for a vehicle according to any one of [1] to [7].

[0017] [9] The glass plate for a vehicle according to any one of [1] to [8], wherein a sealant is provided around the periphery of a contact surface between the optical element and the glass plate.

[0018]

[10] a support member is bonded to a second main surface of the optical element opposite to the first main surface, The light is introduced into the optical element from a side surface of the optical element. The glass plate for a vehicle according to any one of [1] to [9].

[0019]

[11] a substrate is provided on a second main surface side of the optical element opposite to the first main surface, a light source is disposed on the substrate so as to extend from the substrate toward the glass plate; The light emitted from the light source is introduced into the optical element from a side surface of the optical element. The glass plate for a vehicle according to any one of [1] to

[10] .

[0020]

[12] Further, a case for covering the optical element is provided. the case applies a force to a second principal surface of the optical element opposite to the first principal surface in a direction pressing the optical element against the glass plate; The glass plate for a vehicle according to any one of [1] to

[11] .

[0021]

[13] The case is a flat plate portion that is in direct or indirect contact with the second main surface of the optical element; and a column portion disposed around the flat plate portion, extending from the flat plate portion toward the glass plate, and bonded to the glass plate.

[12] The vehicle glass plate according to

[12] .

[0022]

[14] [1] to

[13] , wherein the glass plate is a laminated glass including a first glass plate, a second glass plate, and an intermediate adhesive layer disposed between the first glass plate and the second glass plate. The glass plate for a vehicle according to any one of claims 1 to 4.

[0023]

[15] an optical element made of a soft, transparent resin material is disposed on a glass plate; The optical element is pressed against the glass plate with a roller to bring the optical element into close contact with the glass plate. A method for manufacturing glass sheets for vehicles. [Effects of the Invention]

[0024] The present disclosure provides a glass plate for a vehicle that allows an optical element to be appropriately attached to the glass plate, and a method for manufacturing the glass plate for a vehicle. [Brief explanation of the drawings]

[0025] [Figure 1] 1 is a cross-sectional view showing an example of the configuration of a glass plate for a vehicle according to a first embodiment. [Figure 2] 1 is a plan view showing an example of the configuration of a glass plate for a vehicle according to a first embodiment. [Figure 3] FIG. 4 is a cross-sectional view showing another example of the configuration of the glass plate for a vehicle according to the first embodiment. [Figure 4] FIG. 4 is a cross-sectional view showing another example of the configuration of the glass plate for a vehicle according to the first embodiment. [Figure 5] FIG. 4 is a plan view showing another example of the configuration of the glass plate for a vehicle according to the first embodiment. [Figure 6]FIG. 4 is a cross-sectional view showing another example of the configuration of the glass plate for a vehicle according to the first embodiment. [Figure 7] FIG. 4 is a cross-sectional view showing another example of the configuration of the glass plate for a vehicle according to the first embodiment. [Figure 8] 1 is a flowchart illustrating a method for manufacturing a glass plate for a vehicle according to the first embodiment. [Figure 9] FIG. 10 is a cross-sectional view showing an example of the configuration of a glass plate for a vehicle according to a second embodiment. [Figure 10] FIG. 10 is a cross-sectional view showing another example of the configuration of a glass plate for a vehicle according to the second embodiment. [Figure 11] FIG. 10 is a cross-sectional view showing another example of the configuration of a glass plate for a vehicle according to the second embodiment. [Figure 12] FIG. 10 is a cross-sectional view showing another example of the configuration of a glass plate for a vehicle according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0026] <First Embodiment> Hereinafter, an embodiment will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing an example of the configuration of a vehicle glass plate according to a first embodiment, and is a cross-sectional view taken along a cutting line II in FIG. 2. FIG. 2 is a plan view showing the example of the configuration of a vehicle glass plate according to the first embodiment. As shown in FIGS. 1 and 2, a vehicle glass plate 1 according to the present embodiment includes a glass plate 10 and an optical element 21 having a first main surface 31 disposed on the front surface side of the glass plate 10. The optical element 21 is made of a soft resin material. A light source 22 is provided in the optical element 21, and light 71 introduced from the light source 22 to the optical element 21 is introduced into the glass plate 10 via the optical element 21.

[0027] The vehicle glass plate 1 according to this embodiment can be used, for example, as a vehicle window. Examples of vehicle windows include roof glass, windshields, side windows, quarter windows, and rear windows. The vehicle glass plate 1 can be configured to use a light source 22, such as an LED, to introduce irradiated light 71 into the interior of the vehicle glass plate from an end side of the vehicle glass plate 1, and then scatter the light on the surface or inside the vehicle glass plate to extract light 72 to the outside. When such a vehicle glass plate 1 is used as a roof glass, the ceiling portion of the vehicle can be illuminated in a predetermined color, thereby improving the interior design of the vehicle. The vehicle glass plate 1 can also be used as an information notification device for vehicle occupants and people outside the vehicle. The information to be notified includes, for example, danger information and information regarding the vehicle condition, but is not limited thereto. The light 72 extracted to the outside of the vehicle glass plate 1 can be used for various purposes depending on the location of the vehicle glass plate 1 installed in the vehicle.

[0028] The vehicle glass plate 1 shown in Fig. 1 includes a laminated glass as a glass plate 10. The laminated glass includes a first glass plate 11, a second glass plate 12, an intermediate adhesive layer 13 sandwiched between the first glass plate 11 and the second glass plate 12, and a scattering pattern 15.

[0029] The vehicle glass plate 1 according to this embodiment may have a flat shape or a curved shape. It may also have a shape including both flat and curved surfaces. The first glass plate 11 and the second glass plate 12 may each be a flat plate or a curved plate. The curved plate may have a single-curved shape curved in one direction, or a three-dimensional shape curved in two or more directions. The three-dimensional shape may be, for example, a complex-curved shape curved in two orthogonal directions. In the following example, a case will be described in which both the first glass plate 11 and the second glass plate 12 are flat plates, but the same explanation can be applied to the case in which at least one of them is a curved plate.

[0030] The outer edge shapes of the first glass sheet 11 and the second glass sheet 12 in a plan view may be any shape, but are preferably rectangular, trapezoidal, or triangular, for example. Fig. 2 shows an example configuration in which the glass sheet 10 is rectangular. For example, the first glass sheet 11 is disposed on the interior side of the vehicle, and the second glass sheet 12 is disposed on the exterior side of the vehicle.

[0031] The first and second glass plates 11, 12 can be made of, for example, transparent inorganic glass. For example, soda-lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, quartz glass, etc. may also be used for the first and second glass plates 11, 12. The first and second glass plates 11, 12 are manufactured using, for example, the float method, the fusion method, etc., but are not limited to these manufacturing methods.

[0032] The thickness of each of the first and second glass sheets 11, 12 is, for example, 0.1 mm to 10 mm, and from the viewpoint of resistance to stone chipping, is preferably 0.3 mm to 3.0 mm, more preferably 1.1 mm to 2.6 mm, and even more preferably 1.7 mm to 2.1 mm. The thicknesses of the first and second glass sheets 11, 12 may be the same as or different from each other. For example, the thickness of the second glass sheet 12 located on the vehicle exterior side may be thicker than the thickness of the first glass sheet 11 located on the vehicle interior side. Increasing the thickness of the second glass sheet 12 located on the vehicle exterior side in this way improves the strength of the vehicle glass sheet 1 against objects flying toward the vehicle glass sheet 1.

[0033] The intermediate adhesive layer 13 is disposed so as to be sandwiched between the first glass plate 11 and the second glass plate 12. The thickness of the intermediate adhesive layer 13 is not particularly limited, but is preferably, for example, 2.4 mm or less. The thickness of the intermediate adhesive layer 13 is preferably 0.38 mm or more, preferably 0.50 mm or more, and more preferably 0.76 mm or more. By setting the thickness of the intermediate adhesive layer 13 within this range, the transparency of the vehicle glass plate can be ensured and the weight of the vehicle glass plate can be prevented from becoming excessively large.

[0034] The intermediate adhesive layer 13 can be made of a material containing, for example, polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), cycloolefin polymer, urethane resin, ionomer resin, etc. Among these, PVB and EVA are preferably used.

[0035] The scattering pattern 15 is a pattern that scatters light. That is, light 71 introduced from the light source 22 to the optical element 21 is introduced into the glass plate 10 via the optical element 21. A portion of the light introduced into the glass plate 10 is scattered by the scattering pattern 15, and light 72 is extracted to the outside of the glass plate 10. The scattering pattern 15 may be provided at a position other than that shown in FIG. 1. For example, the scattering pattern may be provided on the surface of the second glass plate 12 facing the intermediate adhesive layer 13. The scattering pattern 15 can be formed, for example, by physically or chemically etching the glass plate 11 to roughen the surface of the glass plate 11, or by printing a scattering material containing inorganic or organic fine particles on the surface of the glass plate. Alternatively, the scattering pattern 15 can be formed by printing a scattering material containing inorganic or organic fine particles on the intermediate adhesive layer 13.

[0036] As shown in FIG. 2, the optical element 21 is provided on the edge side of the glass plate 10. In the configuration example shown in FIG. 2, the optical element 21 is rectangular. A plurality of light sources 22 are provided on one side of the optical element 21. The number of light sources 22 can be adjusted depending on the amount of light to be introduced into the glass plate 10, etc. As shown in FIG. 1, light 71 introduced from the light sources 22 to the optical element 21 is introduced into the glass plate 10 via the optical element 21.

[0037] In this embodiment, the optical element 21 is made of a soft, transparent resin material. For example, the optical element 21 may be made of a resin material containing 10% by mass to 50% by mass of a plasticizer. In this case, the rigidity, heat resistance, refractive index, etc. of the optical element 21 may be adjusted by adjusting the amount of the plasticizer.

[0038] In this embodiment, the flexural modulus may be used as a physical property indicating flexibility, and this value is preferably 1,400 or less, more preferably 1,000 or less, even more preferably 500 or less, even more preferably 100 or less, and particularly preferably 70 MPa or less. There is no particular limit to the lower limit of the flexural modulus, but the flexural modulus may be 5 MPa or more, or 10 MPa or more. The flexural modulus can be measured by a three-point bending test in accordance with ISO 178. The test atmosphere may be the standard atmosphere specified in ISO 291, which is a temperature of 23°C and a relative humidity of 50%. It is preferable to construct the optical element 21 using flexible polyvinyl chloride.

[0039] In this embodiment, the physical property indicating flexibility may be the product of the flexural modulus (MPa) and thickness (mm) of the optical element, and this value is preferably 2,700 MPa mm or less, more preferably 1,400 MPa mm or less, and even more preferably 100 MPa mm or less. The lower limit of this value is not particularly limited, but may be 10 MPa mm or more.

[0040] In this embodiment, the refractive index of glass plate 10 (first glass plate 11) is preferably 1.46 or more and 1.58 or less, more preferably 1.48 or more and 1.56 or less, and even more preferably 1.49 or more and 1.55 or less. The refractive index of optical element 21 is preferably 1.46 or more and 1.58 or less, more preferably 1.48 or more and 1.56 or less, and even more preferably 1.50 or more and 1.56 or less. By setting the refractive index of first glass plate 11 and the refractive index of optical element 21 within these ranges, light 71 can be appropriately introduced from optical element 21 to first glass plate 11.

[0041] When glass or acrylic materials are used as optical elements, these materials have a high flexural modulus and are hard, so when the optical element is attached to the glass plate, air bubbles may be trapped at the interface between the glass plate and the optical element. When air bubbles are trapped at the interface between the glass plate and the optical element, light may not be efficiently guided from the optical element to the glass plate. Therefore, a technology for properly attaching an optical element to the surface of a glass plate is needed.

[0042] In the present embodiment, a soft resin material is used for the optical element 21. This makes it possible to prevent air bubbles from being mixed into the contact surface between the first glass plate 11 and the optical element 21. This allows light to be efficiently introduced from the optical element 21 to the first glass plate 11.

[0043] The effects of the present invention will be described in detail below. As a result of the inventor's investigations, in the vehicle glass plate 1 according to this embodiment, by forming the optical element 21 using a flexible resin material, it has been possible to successfully attach the first glass plate 11 and the optical element 21 directly without an adhesive layer. That is, in this embodiment, by forming the optical element 21 using a flexible resin material, the optical element 21 can be closely attached to the first glass plate 11. Here, "close contact" refers to a state in which, when in contact with an object, an adsorption effect is exerted due to the air pressure difference, and the optical element 21 is strongly attached to the object so that it will not fall even if the object is turned upside down.

[0044] In this embodiment, the optical element 21 has flexibility, which allows it to contact the first glass plate 11 while undergoing slight elastic deformation. This slight elastic deformation acts as a tiny suction cup, resulting in close contact. By preventing air from entering between the first main surface 31 of the optical element 21 and the main surface of the first glass plate 11, the adhesion between the first glass plate 11 and the optical element 21 can be improved. Furthermore, since there is essentially no interface due to air bubbles at the contact surface between the first glass plate 11 and the optical element 21, or the bubbles are negligibly small, light can be efficiently introduced from the optical element 21 to the first glass plate 11. Furthermore, even if there is a difference in the linear expansion coefficient between the first glass plate 11 and the optical element 21 and stress due to temperature change acts between the first glass plate 11 and the optical element 21, the flexibility of the optical element 21 reduces the effect of the stress due to temperature change.

[0045] In the present embodiment, unevenness may be provided on the first main surface 31 of the optical element 21. By providing unevenness on the first main surface 31 of the optical element 21 in this way, the adhesion between the first glass plate 11 and the optical element 21 is improved. In this case, the unevenness is set to a degree that does not affect the optical properties of the contact surface between the optical element 21 and the glass plate 10.

[0046] In this embodiment, the optical element 21 may be bonded to the first glass plate 11 using an adhesive member (not shown). In other words, an adhesive member (not shown) may be provided between the first main surface 31 of the optical element 21 and the main surface of the first glass plate 11. In this case, the thickness of the adhesive member is preferably 1 mm or less, more preferably 0.5 mm or less, and even more preferably 0.3 mm or less. The thickness of the adhesive member may be 0.1 mm or less. In particular, in this embodiment, the optical element 21 is formed using a soft resin material, so the thickness of the adhesive member can be thin. The lower limit of the thickness of the adhesive member is approximately 10 μm. As an example, various adhesives such as acrylic resin, nylon resin, polyester resin, silicone resin, epoxy resin, and urethane resin can be used as the adhesive member, but the adhesive member is not limited to these.

[0047] The glass plate 10 used in this embodiment is not limited to laminated glass, and may be a single glass plate. That is, a single glass plate 10 may be provided with an optical element 21, as in the vehicle glass plate 2 shown in Fig. 3. Note that in Fig. 3, the light source is not shown to simplify the drawing. Furthermore, although an example in which a single glass plate is used as the glass plate 10 will be shown hereinafter, in this embodiment, the laminated glass shown in Fig. 1 may also be used as the glass plate 10.

[0048] In this embodiment, as in the vehicle glass plate 3 shown in the cross-sectional view of FIG. 4 and the plan view of FIG. 5, a sealant 23 may be provided around the contact surface between the optical element 21 and the glass plate 10. Note that the cross-sectional view of FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 5. The sealant 23 is preferably made of a material that is elastic and has high adhesion to the glass plate 10. The sealant 23 is preferably transparent or white. For example, moisture-curing, UV-curing, or heat-curing adhesives can be used. For example, various adhesives such as acrylic resin, nylon resin, polyester resin, silicone resin, epoxy resin, and urethane resin can be used. Providing the sealant 23 in this manner can prevent air from entering the contact surface between the optical element 21 and the glass plate 10 from the outside. This improves adhesion between the optical element 21 and the glass plate 10. Furthermore, providing the sealant 23 around the optical element 21 allows the optical element 21 to be fixed to the glass plate 10 without affecting the optical properties of the contact surface between the optical element 21 and the glass plate 10. Therefore, the optical element 21 can be attached to the glass plate 10 appropriately.

[0049] In this embodiment, as in the vehicle glass plate 4 shown in the cross-sectional view of Fig. 6, the support member 25 may be adhered to the second main surface 32 of the optical element 21 opposite to the first main surface 31. In other words, the support member 25 may be adhered to the second main surface 32 of the optical element 21 via an adhesive layer 24. In this case, light is introduced into the optical element 21 from the side surface of the optical element 21.

[0050] The support member 25 has a function of supporting the optical element 21. The support member 25 is preferably made of a material having higher rigidity than the optical element 21. For example, the support member 25 can be made of a glass plate, a metal plate such as an aluminum plate or a stainless steel plate, or a ceramic plate such as alumina. The thickness of the support member 25 is preferably about 0.1 to 1 mm. By setting the thickness of the support member 25 within this range, the support member 25 can be prevented from interfering with the introduction of light from the light source 22 to the optical element 21. Furthermore, the linear expansion coefficient of the support member 25 is preferably close to that of the glass plate 10. Furthermore, the thickness of the adhesive layer 24 may be about 0.1 to 0.5 mm.

[0051] As shown in Fig. 6, by providing a support member 25 to the optical element 21, deformation of the optical element 21 can be suppressed. That is, since the optical element 21 is made of a soft resin material, there is a risk that the optical element 21 will deform due to an external force or the like, causing the tight contact state to be released. In contrast, in the configuration shown in Fig. 6, since the support member 25 is provided to the optical element 21, deformation of the optical element 21 can be suppressed.

[0052] For example, if a glossy metal material is provided on the surface of the support member 25 facing the optical element 21 and a transparent adhesive is used as the material for the adhesive layer 24, the surface of the support member 25 facing the optical element 21 can be used as a reflective surface.

[0053] In this embodiment, a substrate 27 may be provided on the second main surface 32 side of the optical element 21, as in the vehicle glass plate 5 shown in the cross-sectional view of Fig. 7. That is, the substrate 27 may be bonded to a support member 25 that is bonded to the optical element 21 via an adhesive layer 26. The substrate 27 is a printed circuit board (PCB) or a flexible substrate, and a circuit for controlling the light source 28 may be provided on the substrate 27. The thickness of the adhesive layer 26 may be approximately 0.1 mm to 0.5 mm.

[0054] 7, the light source 28 is disposed so as to extend from the substrate 27 toward the glass plate 10. Light emitted from the light source 28 is introduced into the optical element 21 from the side surface of the optical element 21. By providing the substrate 27 including the light source 28 on the second main surface 32 side of the optical element 21, the optical element 21, the substrate 27, and the light source 28 can be integrated, thereby realizing space-saving of the vehicle glass plate.

[0055] 7 shows a configuration in which substrate 27 is bonded to support member 25 via adhesive layer 26, but support member 25 may be omitted. For example, if a printed circuit board is used for substrate 27, substrate 27 itself has rigidity, and therefore substrate 27 also functions as support member 25. In this case, substrate 27 may be bonded directly to second main surface 32 of optical element 21 without providing support member 25.

[0056] Next, a method for manufacturing a glass plate for a vehicle according to this embodiment will be described. Fig. 8 is a flowchart for explaining the method for manufacturing a glass plate for a vehicle according to this embodiment. The method for manufacturing a glass plate for a vehicle will be described below with reference to Figs. 4 and 5 as well.

[0057] First, the optical element 21 is placed on the glass plate 10 (step S1: FIGS. 4 and 5). The optical element 21 is made of a soft, transparent resin material, and can be made using the materials described above. Next, the optical element 21 is preheated (step S2). For example, after the optical element 21 is placed on the glass plate 10, the glass plate 10 with the optical element 21 thereon may be placed in a heating furnace to preheat the optical element 21. Alternatively, the optical element 21 placed on the glass plate 10 may be heated using a heater or the like.

[0058] Next, the preheated optical element 21 is pressed against the glass plate 10 with a roller, and the optical element 21 is brought into close contact with the glass plate 10 (step S3). The preheated optical element 21 is flexible. Therefore, by pressing the optical element 21 against the glass plate 10 with the roller, the optical element 21 is elastically deformed, and the optical element 21 can be brought into close contact with the glass plate 10 while removing air from the contact surface between the optical element 21 and the glass plate 10. It should be noted that it is not always necessary to use a roller, and an alternative jig for bringing the optical element 21 into close contact with the glass plate 10 may be used as appropriate.

[0059] Next, a sealant 23 is applied to the periphery of the contact surface between the optical element 21 and the glass plate 10 (step S4: FIGS. 4 and 5). The materials described above can be used for the sealant 23. By providing the sealant 23, it is possible to prevent air from entering the contact surface between the optical element 21 and the glass plate 10 from the outside. This improves the adhesion between the optical element 21 and the glass plate 10. Note that the step of preheating the optical element 21 (step S2) and the step of applying the sealant 23 (step S4) are not essential steps and may be omitted as appropriate.

[0060] According to the present embodiment described above, it is possible to provide a glass plate for a vehicle on which an optical element can be appropriately attached, and a method for manufacturing the glass plate for a vehicle.

[0061] <Embodiment 2> Next, a second embodiment will be described. Fig. 9 is a cross-sectional view showing an example of the configuration of a vehicle glass plate according to embodiment 2. The vehicle glass plate 6 according to embodiment 2 shown in Fig. 9 differs from the vehicle glass plate 5 according to embodiment 1 shown in Fig. 7 in that it includes a case 40. Other than this, it is the same as the vehicle glass plate 5 according to embodiment 1, and therefore the same components are designated by the same reference numerals and redundant explanations will be omitted.

[0062] As shown in FIG. 9, the vehicle glass plate 6 according to this embodiment further includes a case 40 in addition to the vehicle glass plate 5 shown in FIG. 7. The case 40 is provided so as to cover the optical element 21. For example, the case 40 is provided so as to cover the entire optical element 21 when viewed in a plan view. The case 40 may be configured to seal the optical element 21, or may be configured so as to be partially open. The case 40 applies a force to the second main surface 32 of the optical element 21 in a direction that presses the optical element 21 against the glass plate 10.

[0063] The case 40 has a flat plate portion 41 and pillar portions 42. The flat plate portion 41 is bonded to the substrate 27 via an adhesive layer 44. The pillar portions 42 are arranged around the flat plate portion 41, extend from the flat plate portion 41 toward the glass plate 10, and are bonded to the glass plate 10. The flat plate portion 41 and pillar portions 42 that constitute the case 40 may be integrally formed. For example, the case 40 may be made of a resin material. Polypropylene, polyethylene, polycarbonate, etc. can be used as the material that constitutes the case 40.

[0064] The pillars 42 of the case 40 are adhered to the glass plate 10 via an adhesive layer 43. The adhesive layer 43 is preferably made of an elastic material. For example, the adhesive layer 43 can be made of urethane, silicone resin, epoxy resin, or the like. By making the adhesive layer 43 out of an elastic material, a force can be applied from the case 40 to the optical element 21 in a direction toward the glass plate 10.

[0065] Furthermore, in this embodiment, the case 40 may be made of an elastic material. When the case 40 is made of an elastic material in this way, a force can be applied from the case 40 to the second main surface 32 of the optical element 21 in a direction pressing the optical element 21 against the glass plate 10. In particular, in this embodiment, by using an elastic material for the pillar portions 42 of the case 40, a force can be effectively applied from the case 40 to the second main surface 32 of the optical element 21 in a direction pressing the optical element 21 against the glass plate 10.

[0066] Fig. 10 is a cross-sectional view showing another example of the configuration of a vehicle glass plate according to this embodiment. In this embodiment, as in the vehicle glass plate 7 shown in Fig. 10, a pin 46 penetrating the substrate 27 may be provided on the case 40. The pin 46 extends from the flat portion 41 of the case 40 toward the glass plate 10 and is bonded to the glass plate 10 via an adhesive layer 43. The flat portion 41, the pillar portions 42, and the pin 46 that constitute the case 40 may be integrally formed. In this embodiment, when the case 40 is viewed from above, a plurality of pins 46 may be arranged at predetermined intervals along the pillar portions 42.

[0067] The pins 46 penetrate the substrate 27, and therefore the substrate 27 is positioned by the pins 46. Furthermore, by providing the pins 46, the strength of the flat plate portion 41 can be maintained when pressed against the glass plate 10.

[0068] Fig. 11 is a cross-sectional view showing another example of the configuration of a vehicle glass plate according to this embodiment. In this embodiment, as in a vehicle glass plate 8 shown in Fig. 11 , hole portions 48 may be formed in some of the pillar portions 42 of the case 40. The hole portions 48 are formed so as to penetrate the pillar portions 42 of the case 40 from the outside toward the inside. The hole portions 48 may be formed at predetermined intervals in the depth direction of Fig. 11 . Fig. 11 shows an example of a configuration in which the hole portions 48 are provided in the right-side pillar portion 42, but the hole portions 48 may also be provided in the left-side pillar portion 42, or may be provided in both the left-side pillar portion 42 and the right-side pillar portion 42.

[0069] When the holes 48 are provided in the column portions 42, the elastic properties of the column portions 42 can be improved. Therefore, a force can be effectively applied from the case 40 to the second main surface 32 of the optical element 21 in a direction pressing the optical element 21 against the glass plate 10. Furthermore, when the holes 48 are provided in the column portions 42, the column portions 42 can be attached to the glass plate 10 so as to conform to the surface shape of the glass plate 10. For example, if the surface of the glass plate 10 is curved, providing the holes 48 in the column portions 42 allows the column portions 42 to be attached to the glass plate 10 so as to conform to the curved shape of the glass plate 10. Furthermore, when the holes 48 are provided in the column portions 42, the stress acting between the glass plate 10 and the column portions 42 can be dispersed, and stress concentration on the column portions 42 can be suppressed. Therefore, the strength of the column portions 42 can be improved.

[0070] 9 to 11 show configuration examples in which the flat plate portion 41 is bonded to the substrate 27. However, in the present embodiment, it is sufficient that the flat plate portion 41 of the case 40 is in direct or indirect contact with the second main surface 32 of the optical element 21.

[0071] For example, the case 40 may be provided on the vehicle glass plates 2 and 3 having the configurations shown in Figures 3 and 4. That is, the flat plate portion 41 of the case 40 may be directly bonded to the second main surface 32 of the optical element 21 via an adhesive layer.

[0072] 6, the case 40 may be provided on the vehicle glass plate 4 having the configuration shown in Fig. 6. That is, the support member 25 may be bonded to the second main surface 32 of the optical element 21 via the adhesive layer 24, and the flat plate portion 41 of the case 40 may be bonded to the support member 25 via the adhesive layer.

[0073] That is, in this embodiment, any configuration may be used as long as it is possible to apply a force from the case 40 to the optical element 21 in a direction pressing it against the glass plate 10.

[0074] Fig. 12 is a cross-sectional view showing another example of the configuration of a vehicle glass plate according to this embodiment. In this embodiment, as in the vehicle glass plate 9 shown in Fig. 12, a light source 52 may be attached to a pillar portion 42 of a case 40. In this case, light emitted from the light source 52 is introduced into the optical element 21 from the side surface of the optical element 21.

[0075] Specifically, as shown in FIG. 12 , the flat plate portion 41 of the case 40 is bonded to the optical element 21 via an adhesive layer 49. Furthermore, a substrate 51 is attached to the inner wall surface of the pillar portion 42 of the case 40 via an adhesive layer 53. A light source 52 is provided on the substrate 51. Furthermore, a pin 54 is provided on the inner wall surface of the pillar portion 42 of the case 40. The pin 54 penetrates the substrate 51. By having the pin 54 penetrate the substrate 51 in this way, the substrate 51 is positioned. With this configuration, the case 40 applies a force to the optical element 21 in a direction pressing the optical element 21 against the glass plate 10, and the light source 52 can be disposed on the side of the optical element 21. [Example]

[0076] Next, examples will be described below. The relationship between the flexural modulus of each resin material and the adhesiveness was investigated.

[0077] (sample) Samples according to Examples 1 to 17 shown in Table 1 below were prepared. Specifically, a 2.0 mm thick float glass plate was prepared as Example 1, and a 3.0 mm thick acrylic plate was prepared as Example 2. Soft polyvinyl chloride (hereinafter, PVC) plates were prepared with thicknesses of 2.0 mm and 4.0 mm, respectively, as Examples 3 and 4. PVC plates were prepared with thicknesses of 1.0 mm, 2.0 mm, and 3.0 mm, respectively, as Examples 5 to 7. Polycarbonate (hereinafter, PC) plates were prepared with thicknesses of 1.0 mm, 2.0 mm, and 3.0 mm, respectively, as Examples 8 to 10. Polystyrene (hereinafter, PS) plates were prepared with thicknesses of 1.0 mm, 1.0 mm, and 3.0 mm, respectively, as Example 11. Polypropylene (hereinafter, PP) plates were prepared with thicknesses of 0.75 mm, 1.0 mm, 2.0 mm, and 3.0 mm, respectively, as Examples 12 to 15. Foamed polyethylene (hereinafter, PE) plates with thicknesses of 2.4 mm were prepared as Example 16. As Example 17, polyethylene (hereinafter referred to as PE) having a thickness of 1.0 mm was prepared.

[0078] (Measurement of flexural modulus) The flexural modulus was measured by a three-point bending test in accordance with ISO 178. The test atmosphere was the standard atmosphere specified in ISO 291, at a temperature of 23°C and a relative humidity of 50%.

[0079] (Calculation of bending modulus x thickness) The flexibility was evaluated by multiplying the flexural modulus (MPa) of the resin material by its thickness (mm) (hereinafter referred to as the flexibility index). The flexibility index takes into account both the flexural modulus and the thickness of the resin material.

[0080] (Evaluation of adhesiveness) The adhesion was evaluated based on the presence of bubbles between the adhesive and the resin material, and was evaluated according to the following criteria. ◎ No residual bubbles ○...Slight bubbles remaining (less than 5% of the adhesive surface) △: Slight bubbles remain on less than 5-10% of the adhesive surface × More than 10% of bubbles remain on the adhesive surface

[0081] (Test results) Table 1 shows the relationship between the flexural modulus of each resin material and adhesion. As shown in Table 1, Examples 3, 4, 12, 16, and 17, which used resin materials with flexural moduli of 1,400 MPa or less, were evaluated as having good adhesion. In particular, Example 3, which used a 2.0 mm thick soft PVC, had a flexural modulus of 27.1 MPa, and adhesion was good. Furthermore, Example 4, which used a 3.0 mm thick soft PVC, had a flexural modulus of 14.1 MPa, and adhesion was good.

[0082] On the other hand, samples using resin materials other than these had high flexural modulus values ​​and hard resin materials, and therefore did not adhere well.

[0083] Furthermore, when focusing on the flexibility index (flexural modulus × thickness), Examples 3, 4, 12, 16, and 17, which used resin materials with a flexibility index of 1,300 MPa·mm or less, were evaluated as having good adhesion. In particular, Example 3, which used a 2.0 mm thick flexible PVC, had a flexibility index of 54.2 MPa·mm, indicating good adhesion. Furthermore, Example 4, which used a 3.0 mm thick flexible PVC, had a flexibility index of 42.3 MPa·mm, indicating good adhesion.

[0084] On the other hand, the samples using resin materials other than these had high softness index values ​​and poor adhesion due to the hardness of the resin materials.

[0085] [Table 1]

[0086] The present invention has been described above in accordance with the above-mentioned embodiment, but the present invention is not limited to the configuration of the above-mentioned embodiment, and naturally includes various modifications, alterations, and combinations that a person skilled in the art can make within the scope of the invention as defined in the claims of this application. [Explanation of symbols]

[0087] 1, 2, 3, 4, 5, 6, 7, 8, 9 Vehicle glass panels 10 Glass Plate 11 First glass plate 12 Second glass plate 13 Intermediate adhesive layer 15 patterns 21 Optical Elements 22 Light source 23 Encapsulating material 24, 26 Adhesive layer 25 Support member 27 Circuit Board 28 light source 31 First main surface 32 Second main surface 40 cases 41 Flat plate part 42 Column section 43, 44, 49 Adhesive layer 46 pins 48 Hole 51 PCB 52 Light source 53 Adhesive layer 54 pin

Claims

1. A glass plate and an optical element having a first main surface disposed on the front surface side of the glass plate, the optical element is made of a soft, transparent resin material, The light introduced into the optical element is introduced into the glass plate via the optical element. Vehicle glass panels.

2. 2. The glass plate for a vehicle according to claim 1, wherein the optical element has a flexural modulus of 1,400 MPa or less.

3. 2. The glass plate for a vehicle according to claim 1, wherein the product of the flexural modulus (MPa) and the thickness (mm) of the optical element is 2,700 MPa·mm or less.

4. The glass plate for a vehicle according to any one of claims 1 to 3, wherein the optical element is disposed so as to be in close contact with the glass plate.

5. The glass plate for a vehicle according to claim 4 , wherein the optical element is adhered to the glass plate using an adhesive member.

6. 3. The glass plate for a vehicle according to claim 1, wherein the optical element is made of a resin material containing 10% by mass to 50% by mass of a plasticizer.

7. 3. The glass plate for a vehicle according to claim 1, wherein the optical element is made of polyvinyl chloride.

8. The refractive index of the glass plate is 1.48 or more and 1.56 or less, The refractive index of the optical element is 1.46 or more and 1.58 or less. The glass plate for a vehicle according to claim 1 or 2.

9. The glass plate for a vehicle according to claim 1 or 2, wherein a sealant is provided around a periphery of a contact surface between the optical element and the glass plate.

10. a support member is bonded to a second main surface of the optical element opposite to the first main surface, The light is introduced into the optical element from a side surface of the optical element. The glass plate for a vehicle according to claim 1 or 2.

11. a substrate is provided on a second main surface side of the optical element opposite to the first main surface, a light source is disposed on the substrate so as to extend from the substrate toward the glass plate; The light emitted from the light source is introduced into the optical element from a side surface of the optical element. The glass plate for a vehicle according to claim 1 or 2.

12. Further, a case for covering the optical element is provided. the case applies a force to a second principal surface of the optical element opposite to the first principal surface in a direction pressing the optical element against the glass plate; The glass plate for a vehicle according to claim 1 or 2.

13. The case is a flat plate portion that is in direct or indirect contact with the second main surface of the optical element; and a column portion disposed around the flat plate portion, extending from the flat plate portion toward the glass plate, and bonded to the glass plate. The glass plate for a vehicle according to claim 12.

14. 3. The vehicle glass plate according to claim 1, wherein the glass plate is a laminated glass including a first glass plate, a second glass plate, and an intermediate adhesive layer disposed between the first glass plate and the second glass plate.

15. an optical element made of a soft, transparent resin material is disposed on a glass plate; The optical element is pressed against the glass plate with a roller to bring the optical element into close contact with the glass plate. A method for manufacturing glass sheets for vehicles.

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