Glass plate for vehicle and method for producing a glass plate for vehicle

Abstract

For providing a glass panel for a vehicle that allows an optical component to be appropriately mounted on a glass panel. A glass panel for a vehicle according to one aspect of the present disclosure includes a glass panel (10) and an optical component (21) having a first main surface (31) located on one surface side of the glass panel (10). The optical component (21) is formed using a transparent resin material having softness, and light (71) introduced into the optical component (21) is introduced into the glass panel (10) through the optical component (21).

Description

background

[0001] The present disclosure relates to a glass panel for a vehicle and a method of manufacturing a glass panel for a vehicle.

[0002] Recently, a technique of introducing an irradiation light into a glass panel for a vehicle from an end portion side of the glass panel for a vehicle using a light source such as a light-emitting diode (LED) and scattering the light at a surface of or in the glass panel for a vehicle to take out the light has been developed.

[0003] Patent Literature 1 discloses a technique of attaching an optical component to a glass panel in an automobile using an adhesive member.

[0004] Patent Literature 1: International Patent Publication No. WO 2021 / 198262 Brief description

[0005] For introducing light into a glass panel for a vehicle, an optical component is provided on the glass panel for a vehicle, and light emitted from a light source is introduced into the glass panel for a vehicle through this optical component. Patent Literature 1 discloses a technique of attaching an optical component to a glass panel using an adhesive member.

[0006] However, in a case where the optical component is provided on a surface of the glass plate, there are cases where air bubbles are trapped in the interface between the glass plate and the optical component. In a case where air bubbles are trapped in the interface between the glass plate and the optical component as described above, there are cases where it is not possible to efficiently introduce light from the optical component into the glass plate. Therefore, it has been considered that a technique of properly attaching an optical component to a surface of a glass plate is needed.

[0007] In consideration of the above-described problem, an object of the present disclosure is to provide a glass panel for a vehicle that allows an optical component to be appropriately attached to a glass panel and a method for manufacturing a glass panel for a vehicle.

[0008] A glass panel for a vehicle and a method of manufacturing a glass panel for a vehicle according to one aspect of the present disclosure are as described below. [1] A glass panel for a vehicle, comprising: a glass plate; and an optical component having a first main surface arranged on a surface side of the glass plate, in which the optical component is formed using a transparent resin material having softness, and Light introduced into the optical component, introduced through the optical component into the glass plate. [2] The glass panel for a vehicle according to [1], in which the optical component has a flexural modulus of 1400 MPa or less. [3] The glass panel for a vehicle according to [1], in which a product of a flexural modulus (MPa) and a thickness (mm) of the optical component is 2700 MPa · mm or less. [4] The glass panel for a vehicle according to any one of [1] to [3], in which the optical component is arranged in close contact with the glass panel. [5] The glass panel for a vehicle according to any one of [1] to [4], wherein the optical component is adhered to the glass panel using an adhesive member. [6] The glass panel for a vehicle according to any one of [1] to [5], wherein the optical member is configured using a resin material containing 10 mass % or more and 50 mass % or less of a plasticizer. [7] The glass panel for a vehicle according to any one of [1] to [6], in which the optical component is designed using polyvinyl chloride. [8] The glass panel for a vehicle according to any one of [1] to [7], in which the glass plate has a refractive index of 1.48 or more and 1.56 or less, and the optical component has a refractive index of 1.46 or more and 1.58 or less. [9] The glass panel for a vehicle according to any one of [1] to [8], wherein a sealing material is provided at a periphery of a contact surface between the optical member and the glass panel.

[10] The glass panel for a vehicle according to any one of [1] to [9], in which a support element is adhered to a second main surface on a side opposite to the first main surface of the optical component, and the light is introduced into the optical component from a side surface of the optical component.

[11] The glass panel for a vehicle according to any one of [1] to

[10] , in which a substrate is provided on a second main surface side on a side opposite to the first main surface of the optical component, a light source for extending toward the glass plate side of the substrate is arranged on the substrate, and Light emitted by the light source is introduced into the optical component from a side surface of the optical component.

[12] The glass panel for a vehicle according to any one of [1] to

[11] , further comprising a casing designed to cover the optical component, wherein the housing transmits a force pressing the optical component against the glass plate to a second main surface on a side opposite to the first main surface of the optical component.

[13] The glass panel for a vehicle according to

[12] , in which the housing comprises: a flat plate portion which is in direct or indirect contact with the second main surface of the optical component; and a column portion disposed at a periphery of the flat plate portion, extending toward the glass plate side from the flat plate portion, and adhered to the glass plate.

[14] The glass panel for a vehicle according to any one of [1] to

[13] , wherein the glass panel is a laminated glass comprising a first glass panel, a second glass panel, and an intermediate adhesive layer disposed between the first glass panel and the second glass panel.

[15] A method of manufacturing a glass panel for a vehicle, in which an optical member formed of a transparent resin material having softness is arranged on a glass panel, and the optical component is in close contact with the glass plate while the optical component is pressed against the glass plate using a roller.

[0009] The present disclosure makes it possible to provide a glass panel for a vehicle that allows an optical component to be appropriately attached to a glass panel and a method for manufacturing a glass panel for a vehicle.

[0010] The above and other objects, features and advantages of the present disclosure will be more fully understood from the detailed description provided below and the accompanying drawings. Short description of drawings Fig. 1 is a cross-sectional view showing a configuration example of a glass panel for a vehicle according to a first embodiment; Fig. 2 is a plan view showing the configuration example of the glass panel for a vehicle according to the first embodiment; Fig.3 is a cross-sectional view showing another configuration example of the glass panel for a vehicle according to the first embodiment; Fig. 4 is a cross-sectional view showing another configuration example of the glass panel for a vehicle according to the first embodiment; Fig. 5 is a plan view showing another configuration example of the glass panel for a vehicle according to the first embodiment; Fig. 6 is a cross-sectional view showing another configuration example of the glass panel for a vehicle according to the first embodiment; Fig. 7 is a cross-sectional view showing another configuration example of the glass panel for a vehicle according to the first embodiment; Fig. 8 is a flowchart for describing a method of manufacturing the glass panel for a vehicle according to the first embodiment; Fig.9 is a cross-sectional view showing a configuration example of a glass panel for a vehicle according to a second embodiment; Fig. 10 is a cross-sectional view showing another configuration example of the glass panel for a vehicle according to the second embodiment; Fig. 11 is a cross-sectional view showing another configuration example of the glass panel for a vehicle according to the second embodiment; and Fig. 12 is a cross-sectional view showing another configuration example of the glass panel for a vehicle according to the second embodiment. Description of embodiments<Erste Ausführungsform>

[0011] An embodiment will be described below with reference to drawings.

[0012] Fig.1 is a cross-sectional view showing a configuration example of a glass panel for a vehicle according to a first embodiment, and is a cross-sectional view taken along a section line II in Fig. 2. Fig. Fig. 2 is a plan view showing the design example of the glass panel for a vehicle according to the first embodiment. As shown in Fig. 1 and Fig. As shown in FIG. 2, a glass panel for a vehicle 1 according to the present embodiment includes a glass panel 10 and an optical member 21 having a first main surface 31 located on one surface side of the glass panel 10. The optical member 21 is formed using a transparent resin material having softness. A light source 22 is provided on the optical member 21, and light 71 introduced from the light source 22 into the optical member 21 is introduced into the glass panel 10 through the optical member 21.

[0013] The glass panel for a vehicle 1 according to the present embodiment can be used as, for example, a vehicle window. Examples of the vehicle window include a roof glass, a windshield, a side window, a rear side window, and a rear window. The glass panel for a vehicle 1 can be configured such that the irradiation light 71 is introduced into the glass panel for a vehicle from one end portion side of the glass panel for a vehicle 1 using the light source 22 such as an LED, and the light is diffused on a surface of or in the glass panel for a vehicle to extract light 72 to the outside. In a case where such a glass panel for a vehicle 1 is used as a roof glass, it is possible to illuminate the ceiling part in a vehicle in a predetermined color and improve designability in the vehicle.In addition, the glass panel for a vehicle can also be used as an information notification device for passengers in the vehicle or people outside the vehicle. At this time, the information to be notified is, for example, information about a hazard or information about a vehicle condition, but is not limited thereto. The light 72 projected to the exterior of the glass panel for a vehicle 1 can be used in a variety of applications in vehicles according to the mounting sections of the glass panel for a vehicle 1.

[0014] The glass plate for a vehicle 1, which is in Fig. 1 includes a laminated glass as the glass plate 10. The laminated glass has a first glass plate 11, a second glass plate 12, an intermediate adhesive layer 13 disposed between the first glass plate 11 and the second glass plate 12, and a diffusion pattern 15.

[0015] The glass panel for a vehicle 1 according to the present embodiment may have a flat shape or a curved shape. In addition, the glass panel for a vehicle may have both a flat shape and a curved shape. The first glass panel 11 and the second glass panel 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. For example, the three-dimensional shape may be a double-curved shape curved in two directions orthogonal to each other. In the following example, a case will be described where both the first glass panel 11 and the second glass panel 12 are configured to be flat plates, but the same description can be applied to a case where at least one of them is configured to be a curved plate.

[0016] The outer edge shapes of the first glass plate 11 and the second glass plate 12 in a plan view may be any shapes, but are preferably, for example, rectangular, trapezoidal and triangular. Fig. 2 shows a design example of a case where the glass panel 10 is rectangular. For example, the first glass panel 11 is arranged inside an automobile, and the second glass panel 12 is arranged outside the automobile.

[0017] The first and second glass plates 11 and 12 can be formed using, for example, transparent inorganic glass. For the first and second glass plates 11 and 12, soda-lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, or quartz glass can also be used. The first and second glass plates 11 and 12 are manufactured using, for example, a float method or a fusion method, but the manufacturing method is not limited thereto.

[0018] The thickness of each of the first and second glass panels 11 and 12 is, for example, 0.1 mm to 10 mm, 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, in view of the tolerance against stone chipping. The thicknesses of the first and second glass panels 11 and 12 may be the same or may be different from each other. For example, the thickness of the second glass panel 12 disposed outside an automobile may be thicker than the thickness of the first glass panel 11 disposed inside the automobile. In a case where the thickness of the second glass panel 12 disposed outside the automobile is thicker, the strength of the glass panel for a vehicle 1 against an object flying toward the glass panel for a vehicle 1 improves.

[0019] The intermediate adhesive layer 13 is arranged 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 and is preferably, for example, 2.4 mm or less. In addition, the thickness of the intermediate adhesive layer 13 is preferably 0.38 mm or more, more preferably 0.50 mm or more, and even more preferably 0.76 mm or more. By setting the thickness of the intermediate adhesive layer 13 within this range, it is possible to ensure the transparency of the glass plate for a vehicle and suppress the weight of the glass plate for a vehicle from becoming excessive.

[0020] The intermediate adhesive layer 13 can be formed using, for example, materials including polyvinyl butyral (PVB), ethylene vinyl acetate (EVA), a cycloolefin polymer, a urethane resin, and an ionomer resin. Of these, PVB and EVA can be suitably used.

[0021] The diffusion pattern 15 is a pattern that scatters light. That is, the light 71 introduced into the optical component 21 from the light source 22 is introduced into the glass plate 10 through the optical component 21. Then, a part of the light introduced into the glass plate 10 is scattered by the diffusion pattern 15, thereby extracting the light 72 to the outside of the glass plate 10. A position at which the diffusion pattern 15 is provided may be a position other than the position shown in Fig.1. For example, the scattering pattern may be provided on a surface of the second glass plate 12 on the side of the intermediate adhesive layer 13. The scattering pattern 15 may be formed by, for example, physically or chemically etching the glass plate 11 to roughen the surface of the glass plate 11 or printing a scattering material containing inorganic or organic fine particles onto a surface of the glass plate. In addition, the scattering pattern 15 may be formed by printing a scattering material containing inorganic or organic fine particles onto the intermediate adhesive layer 13.

[0022] As in Fig. 2, the optical component 21 is provided on one end portion side of the glass plate 10. In the design example shown in Fig.2, the optical component 21 has a rectangular shape. A plurality of light sources 22 are provided on one side surface of the optical component 21. The number of light sources 22 can be adjusted depending on the amount of light to be introduced into the glass plate 10 or the like. As shown in Fig. As shown in Figure 1, the light 71 introduced into the optical member 21 from the light source 22 is introduced into the glass plate 10 through the optical member 21. The optical member 21 is a polyhedron in the present design example and is generally classified as a prism, but is not limited to a prism as long as the optical member is capable of changing the propagation direction of the light source 22.

[0023] The optical component 21 in the present embodiment is formed using a transparent resin material that has softness. The optical component 21 may be formed using, for example, a resin material containing 10 mass percent or more and 50 mass percent or less of a plasticizer. In this case, the rigidity, heat resistance, refractive index, or the like of the optical component 21 can be adjusted by adjusting the amount of the plasticizer.

[0024] In the present embodiment, the flexural modulus can be used as a physical property value indicating softness, and the value is preferably 1400 MPa or less, more preferably 1000 MPa or less, even more preferably 500 MPa or less, further more preferably 100 MPa or less, and particularly preferably 70 MPa or less. The lower limit of the flexural modulus is not particularly limited, and 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. In the test environment, the temperature may be 23°C and the relative humidity may be 50%, which are the standard environments regulated by ISO 291. The optical component 21 is preferably formed using a polyvinyl chloride having softness.

[0025] In the present embodiment, the product of the flexural modulus (MPa) and the thickness of the optical component can also be used as a physical property value indicating softness, and the value is preferably 2700 MPa mm or less, more preferably 1400 MPa mm or less, and even more preferably 100 MPa mm or less. The lower limit of the value is not particularly limited and can be 10 MPa mm or more.

[0026] The refractive index of the glass plate 10 (the first glass plate 11) in the present embodiment 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. In addition, the refractive index of the optical member 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. When the refractive index of the first glass plate 11 and the refractive index of the optical member 21 are set within these ranges, it is possible to properly introduce the light 71 from the optical member 21 into the first glass plate 11.

[0027] In a case where glass or an acrylic material is used as the optical component, since this material is a hard material with a high flexural modulus, there have been cases where air bubbles are trapped in the interface between the glass plate and the optical component. In a case where air bubbles are trapped in the interface between the glass plate and the optical component as described above, there have been cases where it is not possible to efficiently introduce light from the optical component into the glass plate. Therefore, it has been considered that a technique of properly attaching the optical component to the surface of the glass plate is needed.

[0028] In the present embodiment, a resin material having softness is used as the optical component 21. Therefore, it is possible to suppress air bubbles from being trapped in the contact surface between the first glass plate 11 and the optical component 21. Therefore, it is possible to efficiently introduce light from the optical component 21 into the first glass plate 11.

[0029] The operation and effect of the present disclosure will be described in detail below. As a result of studies by the present inventors, in the glass panel for a vehicle 1 according to the present embodiment, the optical member 21 was formed using a resin material having softness, thereby successfully bonding the first glass panel 11 and the optical member 21 directly without interposing adhesive layers therebetween. That is, in the present embodiment, the optical member 21 is formed using a resin material having softness, allowing the optical member 21 to be in close contact with the first glass panel 11.Here, “close contact” refers to a state of the optical component in contact with an object in which an adsorption effect resulting from a difference in atmospheric pressure is exhibited and the optical component is attached so strongly that the optical component does not fall off even if the object is turned downward.

[0030] In the present embodiment, the optical component 21 has softness and therefore comes into contact with the first glass plate 11 in a state where it is elastically deformed to a small extent. It is considered that a small elastically deformed portion acts as a small sucker, and thus the optical component is capable of being in close contact with the first glass plate. At this time, the close contact between the first glass plate 11 and the optical component 21 can be improved by attempting to prevent air from intruding between the first main surface 31 of the optical component 21 and a main surface of the first glass plate 11.In addition, at the contact surface between the first glass plate 11 and the optical component 21, an interface due to air bubbles is substantially not generated or is small enough to be ignored, and thus, it is possible to efficiently introduce light from the optical component 21 into the first glass plate 11. In addition, there is a difference in a linear expansion coefficient between the first glass plate 11 and the optical component 21, and even in a case where a stress resulting from a temperature change acts between the first glass plate 11 and the optical component 21, the influence of the stress resulting from a temperature change can be reduced due to the softness of the optical component 21.

[0031] In the present embodiment, the first main surface 31 of the optical component 21 may be uneven. When the first main surface 31 of the optical component 21 is uneven as described above, the close contact between the first glass plate 11 and the optical component 21 is improved. In this case, the first main surface is uneven to an extent that the optical properties in the contact surface between the optical component 21 and the glass plate 10 are not affected.

[0032] In the present embodiment, the optical component 21 may be adhered 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 component 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 set to 0.1 mm or less. In particular, in the present embodiment, since the optical component 21 is formed using a resin material having softness, it is possible to make the thickness of the adhesive member thin. The lower limit of the thickness of the adhesive member is approximately 10 μm.As an example, a variety of adhesives such as an acrylic resin, a nylon resin, a polyester resin, a silicone resin, an epoxy resin, and a urethane resin can be used as the adhesive member, but the material is not limited thereto.

[0033] The glass panel 10 used in the present embodiment is not limited to laminated glass and may be a single glass panel. That is, like a glass panel for a vehicle 2 used in Fig. 3, the glass panel for a vehicle can be designed by providing the optical component 21 on a single glass panel 10. In Fig. 3, a light source is not shown to simplify the drawing. An example will be described below in which a single glass plate is used as the glass plate 10, but the laminated glass shown in Fig.1 can also be used as the glass plate 10 in the present embodiment.

[0034] In the present embodiment, as in the glass panel for a vehicle 3 shown in a cross-sectional view shown in Fig. 4 and a plan view shown in Fig. 5, a sealing material 23 may be provided at the periphery of the contact surface between the optical component 21 and the glass plate 10. The cross-sectional view shown in Fig. 4 is a cross-sectional view taken along the section line IV-IV in Fig.5. As the sealing material 23, it is preferable to use a material that is elastic and highly adhesive to the glass plate 10. In addition, the color of the sealing material 23 is preferably transparent or white. For example, moisture-curable, UV-curable, thermosetting, and other adhesives can be used as the sealing material. For example, a variety of adhesives such as acrylic resin, nylon resin, polyester resin, silicone resin, epoxy resin, and urethane resin can be used as the sealing material. In a case where the sealing material 23 is provided as described above, it is possible to suppress air from entering the contact surface between the optical component 21 and the glass plate 10 from the outside. Therefore, the tight contact between the optical component 21 and the glass plate 10 is improved.In addition, when the sealing material 23 is provided at the periphery of the optical component 21, it is possible to fix the optical component 21 to the glass plate 10 without affecting the optical properties in the contact area between the optical component 21 and the glass plate 10. Therefore, the optical component 21 can be properly attached to the glass plate 10.

[0035] In the present embodiment, a support member 25 may be adhered to a second main surface 32 of the optical member 21 on a side opposite to the first main surface 31, as in a glass panel for a vehicle 4 shown in a cross-sectional view of Fig. 6. That is, the support member 25 may be adhered to the second main surface 32 of the optical component 21 with an adhesive layer 24 interposed therebetween. In this case, light is introduced into the optical component 21 from a side surface of the optical component 21.

[0036] The support member 25 has a function of supporting the optical component 21. As the support member 25, a material having higher rigidity than the optical component 21 is preferably used. For example, a glass plate, a metal plate such as an aluminum plate or a stainless steel plate, or a ceramic plate such as an alumina plate can be used as the material of the support member 25.

[0037] The thickness of the support member 25 is preferably set to approximately 0.1 mm to 1 mm. When the thickness of the support member 25 is set within this range, it is possible to suppress the support member 25 from interfering with the optical component 21 when light is introduced from the light source 22. In addition, the linear expansion coefficient of the support member 25 is preferably close to the linear expansion coefficient of the glass plate 10. The thickness of the adhesive layer 24 can be set to approximately 0.1 mm to 0.5 mm.

[0038] If the support element 25 is provided on the optical component 21, as in Fig.6, it is possible to suppress the deformation of the optical component 21. That is, the optical component 21 is formed using a resin material that has softness, and thus there is a concern that the close contact state may be released due to deformation by an external force or the like. In contrast, in the design shown in Fig. 6, the support member 25 is provided on the optical component 21 and thus it is possible to suppress the deformation of the optical component 21.

[0039] For example, in a case where a shiny metal material is provided on a surface of the support member 25 on the side of the optical component 21 and a transparent adhesive is used as the material of the adhesive layer 24, the surface of the support member 25 on the side of the optical component 21 can be used as a reflective surface.

[0040] In addition, in the present embodiment, a substrate 27 may be provided on the side of the second main surface 32 of the optical member 21, as in a glass panel for a vehicle 5 shown in a cross-sectional view of Fig. 7. That is, the substrate 27 may be adhered to the support member 25, which has been adhered to the optical component 21, with an adhesive layer 26 interposed therebetween. The substrate 27 is a printed circuit board (PCB) or a flexible substrate, and a circuit for controlling a light source 28 may also be provided on the substrate 27. The thickness of the adhesive layer 26 may be set to approximately 0.1 mm to 0.5 mm.

[0041] As in Fig.As shown in Fig. 7, the light source 28 is arranged to extend toward the glass panel 10 from the substrate 27. Light emitted from the light source 28 is introduced into the optical component 21 from a side surface of the optical component 21. When the substrate 27 including the light source 28 is provided on the second main surface 32 side of the optical component 21, it is possible to integrate the optical component 21, the substrate 27, and the light source 28, and save the space in the glass panel for a vehicle.

[0042] In the design example shown in Fig.7, a configuration was shown in which the substrate 27 is adhered to the support member 25 with the adhesive layer 26 interposed therebetween, but it is possible that the support member 25 is not provided. For example, in a case where a printed circuit board is used as the substrate 27, since the substrate 27 itself has rigidity, the substrate 27 also functions as the support member 25. In this case, the substrate 27 may be directly adhered to the second main surface 32 of the optical component 21 without providing the support member 25.

[0043] Next, a method for manufacturing a glass panel for a vehicle according to the present embodiment will be described. Fig.Fig. 8 is a flowchart for describing the method for manufacturing a glass panel for a vehicle according to the present embodiment. The method for manufacturing a glass panel for a vehicle will be described below with reference to Fig. 4 and Fig. 5 described.

[0044] First, the optical component 21 is arranged on the glass plate 10 (step S1: Fig. 4 and Fig.5). The optical component 21 is formed of a transparent resin material having softness and can be formed using the material described above. Next, the optical component 21 is preheated (step S2). The optical component 21 can be preheated by, for example, placing the optical component 21 on the glass plate 10 and then placing the glass plate 10 including the optical component 21 in a heating furnace. The optical component 21 disposed on the glass plate 10 can also be heated using a heater or the like.

[0045] Next, the optical component 21 is in close contact with the glass plate 10, while the preheated optical component 21 is pressed against the glass plate 10 with a roller (step S3). The preheated optical component 21 has flexibility. Therefore, when the optical component 21 is pressed against the glass plate 10 with the roller, the optical component 21 elastically deforms, and it is possible to bring the optical component 21 into close contact with the glass plate 10 while removing the air in the contact area between the optical component 21 and the glass plate 10. It is not necessary to always use the roller, and any alternative tool for bringing the optical component 21 into close contact with the glass plate 10 can be used as appropriate.

[0046] Next, the sealing material 23 is applied to the periphery of the contact surface between the optical component 21 and the glass plate 10 (step S4: Fig. 4 and Fig. 5). The sealing material 23 can be used as the sealing material 23. The sealing material 23 provided makes it possible to suppress air from entering the contact surface between the optical component 21 and the glass plate 10 from the outside. Therefore, it is possible to improve the tight contact between the optical component 21 and the glass plate 10. The step of preheating the optical component 21 (step S2) and the step of applying the sealing material 23 (step S4) are not essential steps and can thus be omitted as appropriate.

[0047] The present embodiment described above makes it possible to provide a glass panel for a vehicle that allows an optical component to be appropriately attached to a glass panel and a method for manufacturing a glass panel for a vehicle. <Zweite Ausführungsform>

[0048] Next, a second embodiment will be described.

[0049] Fig. 9 is a cross-sectional view showing a configuration example of a glass panel for a vehicle according to the second embodiment. A glass panel for a vehicle 6 according to the second embodiment shown in Fig. 9 is different from the glass panel for a vehicle 5 according to the first embodiment shown in Fig. 7, regarding the fact that a housing 40 is provided. Regarding other points, the glass panel for a vehicle is the same as the glass panel for a vehicle 5 according to the first embodiment, and thus, a repeated description will not be provided by assigning the same reference numeral to the same design element.

[0050] As in Fig.9, the glass panel for a vehicle 6 according to the present embodiment further includes the casing 40 in addition to the glass panel for a vehicle 5 shown in Fig. 7. The housing 40 is provided to cover the optical component 21. For example, the housing 40 is provided to cover the entire optical component 21 in a plan view. The housing 40 can be configured to enclose the optical component 21 or can be configured to be partially open. The housing 40 transmits a force that presses the optical component 21 against the glass plate 10 to the second main surface 32 of the optical component 21.

[0051] The housing 40 includes a flat plate portion 41 and column portions 42. The flat plate portion 41 is adhered to the substrate 27 with an adhesive layer 44 interposed therebetween. The column portions 42 are disposed at the periphery of the flat plate portion 41, extend toward the glass plate 10 side from the flat plate portion 41, and are adhered to the glass plate 10. The flat plate portion 41 and the column portions 42, which constitute the housing 40, may be integrally formed. The housing 40 may be formed using, for example, a resin material. Polypropylene, polyethylene, polycarbonate, and the like can be used as the material constituting the housing 40.

[0052] The column portion 42 of the housing 40 is adhered to the glass plate 10 with an adhesive layer 43 interposed therebetween. The adhesive layer 43 is preferably formed of an elastic material. For example, urethane, a silicone resin, or an epoxy resin can be used as the material of the adhesive layer 43. When the adhesive layer 43 is formed of an elastic material, it is possible to transmit a force toward the glass plate 10 to the optical component 21 from the housing 40.

[0053] Additionally, in the present embodiment, the housing 40 may also be formed of an elastic material. In a case where the housing 40 is formed of an elastic material as described above, it is possible to transmit a force that presses the optical component 21 against the glass plate 10 to the second main surface 32 of the optical component 21 of the housing 40. Specifically, in the present embodiment, an elastic material is used for the column portions 42 of the housing 40, whereby it is possible to effectively transmit a force that presses the optical component 21 against the glass plate 10 to the second main surface 32 of the optical component 21 of the housing 40.

[0054] Fig.Fig. 10 is a cross-sectional view showing another configuration example of the glass panel for a vehicle according to the present embodiment. In the present embodiment, a pin 46 penetrating the substrate 27 may be provided in the housing 40, as in the glass panel for a vehicle 7 shown in Fig. 10. The pin 46 extends toward the glass plate 10 from the flat plate portion 41 of the housing 40 and is adhered to the glass plate 10 with the adhesive layer 43 interposed therebetween. The flat plate portion 41, the column portions 42, and the pin 46 that constitute the housing 40 may be integrally formed. In the present embodiment, a plurality of the pins 46 may be installed at predetermined intervals along the column portions 42 when the housing 40 is viewed from a plan view.

[0055] The pin 46 penetrates the substrate 27, and the position of the substrate 27 is thus determined by the pin 46. In addition, the provided pin 46 maintains the strength when the flat plate portion 41 is pressed against the glass plate 10.

[0056] Fig. Fig. 11 is a cross-sectional view showing another configuration example of the glass panel for a vehicle according to the present embodiment. In the present embodiment, a hole portion 48 may be formed at a part of the pillar portion 42 of the housing 40, as in a glass panel for a vehicle 8 shown in Fig. 11. The hole portion 48 is formed to penetrate the column portion 42 of the housing 40 from the outside to the inside. The hole portions 48 may be formed at predetermined intervals in the depth direction of Fig. 11 be trained. Fig.11 shows a configuration example in which the hole portion 48 is provided in the right column portion 42, but the hole portion 48 may be provided in the left column portion 42 or may be provided in both the left column portion 42 and the right column portion 42.

[0057] In a case where the hole portion 48 is provided in the column portion 42, it is possible to improve the elastic properties of the column portion 42. Therefore, it is possible to effectively transmit a force that presses the optical component 21 against the glass plate 10 to the second main surface 32 of the optical component 21 from the housing 40. In addition, in a case where the hole portion 48 is provided in the column portion 42, the column portion 42 can be attached to the glass plate 10 to conform to the surface shape of the glass plate 10. For example, in a case where the surface of the glass plate 10 is a curved surface, the column portion 42 can be attached along the curved surface of the glass plate 10 by providing the hole portion 48 in the column portion 42.In addition, in a case where the hole portion 48 is provided in the column portion 42, it is possible to disperse stress acting between the glass plate 10 and the column portion 42 and suppress the stress from concentrating on the column portion 42. Therefore, it is possible to improve the strength of the column portion 42.

[0058] The design examples shown in Fig. 9 to Fig. 11, design examples have been described in which the flat plate portion 41 is adhered to the substrate 27. However, in the present embodiment, the flat plate portion 41 of the housing 40 simply needs to be in direct or indirect contact with the second main surface 32 of the optical component 21.

[0059] For example, the housing 40 can also be used in the glass plate for a vehicle 2 or 3, which Fig. 3 or Fig.4 may be provided. That is, the flat plate portion 41 of the housing 40 may also be directly adhered to the second main surface 32 of the optical component 21 with an adhesive layer interposed therebetween.

[0060] In addition, the housing 40 can be used in, for example, the glass plate for a vehicle 4, which Fig. 6 may be provided. That is, the support member 25 may be adhered to the second main surface 32 of the optical component 21 with the adhesive layer 24 interposed therebetween, and the flat plate portion 41 of the housing 40 may be adhered to the support member 25 with an adhesive layer interposed therebetween.

[0061] That is, in the present embodiment, any configuration can be adopted as long as a force pressing the optical component 21 against the glass plate can be transmitted from the housing 40 to the optical component 21.

[0062] Fig. Fig. 12 is a cross-sectional view showing another configuration example of the glass panel for a vehicle according to the present embodiment. In the present embodiment, a light source 52 may be mounted on the column portion 42 of the housing 40, as in a glass panel for a vehicle 9 shown in Fig. 12. In this case, light emitted from the light source 52 is introduced into the optical component 21 from a side surface of the optical component 21.

[0063] Specifically, the flat plate portion 41 of the housing 40 is adhered to the optical component 21 with an adhesive layer 49 interposed therebetween, as shown in Fig.12. In addition, a substrate 51 is attached to the inner wall surface of the column portion 42 of the housing 40 with an adhesive layer 53 interposed therebetween. The light source 52 is provided on the substrate 51. In addition, a pin 54 is provided on the inner wall surface of the column portion 42 of the housing 40. The pin 54 penetrates the substrate 51. The position of the substrate 51 is determined by the pin 54 penetrating the substrate 51, as described above. When the glass panel for a vehicle is configured as described above, it is possible to dispose the light source 52 on a side surface of the optical component 21, while a force pressing the optical component 21 against the glass panel 10 is transmitted to the optical component 21 from the housing 40. Examples

[0064] Next, examples are described. The relationship between the flexural modulus and adhesive strength of each resin material was investigated. (Samples)

[0065] As samples, samples were prepared according to Example 1 to Example 17 shown in Table 1 below. Specifically, a float glass plate with a thickness of 2.0 mm was prepared as Example 1, and an acrylic plate with a thickness of 3.0 mm was prepared as Example 2. Soft polyvinyl chlorides (hereinafter, PVCs) with a thickness of 2.0 mm or 4.0 mm were prepared as Example 3 and Example 4, respectively. PVCs with a thickness of 1.0 mm, 2.0 mm, or 3.0 mm were prepared as Example 5 to Example 7, respectively. Polycarbonates (hereinafter, PCs) with a thickness of 1.0 mm, 2.0 mm, or 3.0 mm were prepared as Example 8 to Example 10, respectively. A polystyrene (hereinafter, PS) with a thickness of 1.0 mm was prepared as Example 11. Polypropylenes (hereinafter PPs) with a thickness of 0.75 mm, 1.0 mm, 2.0 mm or 3.0 mm were prepared as Example 12 to Example 15, respectively.An expanded polyethylene (hereinafter expanded PE) with a thickness of 2.4 mm was prepared as Example 16. A polyethylene (hereinafter PE) with a thickness of 1.0 mm was prepared as Example 17. (Measurement of flexural modulus)

[0066] The flexural modulus was measured by a three-point bending test in accordance with ISO 178. In the test environment, the temperature was set at 23 °C and the relative humidity was set at 50%, which are the standard environments regulated in ISO 291. (Calculation of flexural modulus × thickness)

[0067] As a numerical value for evaluating softness, a value obtained by multiplying the flexural modulus (MPa) of the resin material by the thickness (mm) of the resin material (hereinafter also referred to as the softness index) was used. The softness index is an index taking into account both the flexural modulus of the resin material and the thickness of the resin material. (Assessment of adhesion)

[0068] Adhesion was assessed by the presence of bubbles between an adhesive and the resin material. Adhesion was assessed based on the following standards. Excellent ... no remaining bubbles Good ... few bubbles remained on less than 5% of an adhesive surface Fair ... a small amount of bubbles remained on 5% to less than 10% of the adhesive surface bad ... bubbles remained on 10% or more of the adhesive surface (Test results)

[0069] The relationship between the flexural modulus and adhesive strength of each resin material is shown in Table 1. As shown in Table 1, in Example 3, Example 4, Example 12, Example 16, and Example 17, which used a resin material with a flexural modulus of 1400 MPa or less, the adhesive strength was evaluated as satisfactory. Specifically, in Example 3, which used soft PVC with a thickness of 2.0 mm, the flexural modulus reached 27.1 MPa, and the adhesive strength was satisfactory. In addition, in Example 4, which used soft PVC with a thickness of 3.0 mm, the flexural modulus reached 14.1 MPa, and the adhesive strength was satisfactory.

[0070] On the other hand, in the samples using resin materials other than these, since the flexural modulus values ​​were high and the resin materials were hard, the adhesion was not satisfactory.

[0071] In addition, considering the softness index (flexural modulus × thickness), in Example 3, Example 4, Example 12, Example 16, and Example 17, which used a resin material with a softness index of 1300 MPa·mm or less, the adhesiveness was evaluated as satisfactory. Specifically, in Example 3, which used soft PVC with a thickness of 2.0 mm, the softness index reached 54.2 MPa·mm, and the adhesiveness was satisfactory. In addition, in Example 4, which used soft PVC with a thickness of 3.0 mm, the softness index reached 42.3 MPa·mm, and the adhesiveness was satisfactory.

[0072] On the other hand, in the samples using resin materials other than these, since the values ​​of the softness indices were high and the resin materials were hard, the adhesion was not satisfactory. Table 1 sample Flexural modulus [MPa] Flexural modulus[MPa] × thickness[mm] Adhesion Example 1 Glass_2.0 mm 60436,9 120873,8 bad Example 2 acrylic_3.0 mm 3153,4 9460,2 bad Example 3 soft PVC_2.0 mm 27,1 54,2 excellent Example 4 soft PVC_3.0 mm 14,1 42,3 excellent Example 5 PVC_1.0 mm 3452,5 3452,5 mediocre Example 6 PVC_2.0 mm 3303,0 6606,0 bad Example 7 PVC_3.0 mm 3350,8 10052,4 bad Example 8 PC_1.0 mm 2632,6 2632,6 mediocre Example 9 PC_2.0 mm 2264,1 4528,2 bad Example 10 PC_3.0 mm 2288,7 6866,1 bad Example 11 PS_1.0 mm 2244,5 2244,5 mediocre Example 12 PP_0.75 mm 1302,1 976,6 good Example 13 PP_1.0 mm 1508,5 1508,5 mediocre Example 14 PP_2.0 mm 1774,2 3584,4 mediocre Example 15 PP_3.0 mm 1615,6 4846,8 bad Example 16 expanded PE_2.4 mm 10,1 24,2 good Example 17 PE_1.0 mm 1278,9 1278,9 good

[0073] From the disclosure thus described, it will be apparent that the embodiments of the disclosure may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the disclosure, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] WO 2021 / 198262

[0004]

Claims

[1] Glass panel for a vehicle, comprising: a glass plate; and an optical component having a first main surface arranged on a surface side of the glass plate, wherein the optical component is formed using a transparent resin material having softness, and Light introduced into the optical component, introduced through the optical component into the glass plate. [2] A glass panel for a vehicle according to claim 1, wherein the optical member has a flexural modulus of 1400 MPa or less. [3] A glass panel for a vehicle according to claim 1, wherein a product of the flexural modulus (MPa) and a thickness (mm) of the optical member is 2700 MPa · mm or less. [4] A glass panel for a vehicle according to any one of claims 1 to 3, wherein the optical member is arranged in close contact with the glass panel. [5] A glass panel for a vehicle according to any one of claims 1 to 4, wherein the optical component is adhered to the glass panel using an adhesive member. [6] A glass panel for a vehicle according to any one of claims 1 to 5, wherein the optical member is configured using a resin material containing 10 mass % or more and 50 mass % or less of a plasticizer. [7] A glass panel for a vehicle according to any one of claims 1 to 6, wherein the optical member is constructed using polyvinyl chloride. [8] Glass plate for a vehicle according to one of claims 1 to 7, wherein the glass plate has a refractive index of 1.48 or more and 1.56 or less, and the optical component has a refractive index of 1.46 or more and 1.58 or less. [9] A glass panel for a vehicle according to any one of claims 1 to 8, wherein a sealing material is provided at a periphery of a contact surface between the optical member and the glass panel. [10] Glass plate for a vehicle according to one of claims 1 to 9, wherein a support element is adhered to a second main surface on a side opposite to the first main surface of the optical component, and the light is introduced into the optical component from a side surface of the optical component. [11] Glass plate for a vehicle according to one of claims 1 to 10, wherein a substrate is provided on a second main surface side on a side opposite to the first main surface of the optical component, a light source for extending toward the glass plate side of the substrate is arranged on the substrate, and Light emitted by the light source is introduced into the optical component from a side surface of the optical component. [12] A glass panel for a vehicle according to any one of claims 1 to 11, further comprising a housing configured to cover the optical component, the housing transmitting a force pressing the optical component against the glass panel to a second major surface on a side opposite to the first major surface of the optical component. [13] A glass panel for a vehicle according to claim 12, wherein the housing comprises: a flat plate portion which is in direct or indirect contact with the second main surface of the optical component; and a column portion disposed at a periphery of the flat plate portion, extending toward the glass plate side from the flat plate portion, and adhered to the glass plate. [14] A glass panel for a vehicle according to any one of claims 1 to 13, wherein the glass panel is a laminated glass comprising a first glass panel, a second glass panel, and an intermediate adhesive layer disposed between the first glass panel and the second glass panel. [15] A method for producing a glass panel for a vehicle, wherein an optical component formed of a transparent resin material having softness is arranged on a glass plate, and the optical component is in close contact with the glass plate while the optical component is pressed against the glass plate using a roller.

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