WO2019012962A1 - Window glass for automobiles - Google Patents

Window glass for automobiles Download PDF

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Publication number
WO2019012962A1
WO2019012962A1 PCT/JP2018/023873 JP2018023873W WO2019012962A1 WO 2019012962 A1 WO2019012962 A1 WO 2019012962A1 JP 2018023873 W JP2018023873 W JP 2018023873W WO 2019012962 A1 WO2019012962 A1 WO 2019012962A1
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WO
WIPO (PCT)
Prior art keywords
low radiation
layer
glass
radiation layer
window glass
Prior art date
Application number
PCT/JP2018/023873
Other languages
French (fr)
Japanese (ja)
Inventor
時彦 青木
拓樹 平尾
Original Assignee
Ａｇｃ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ａｇｃ株式会社 filed Critical Ａｇｃ株式会社
Priority to CN201880045768.7A priority Critical patent/CN110869228B/en
Priority to JP2019529030A priority patent/JP7040526B2/en
Publication of WO2019012962A1 publication Critical patent/WO2019012962A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J1/00—Windows; Windscreens; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60S—SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR
    • B60S1/00—Cleaning of vehicles
    • B60S1/02—Cleaning windscreens, windows or optical devices
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/06—Surface treatment of glass, not in the form of fibres or filaments, by coating with metals
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/06—Surface treatment of glass, not in the form of fibres or filaments, by coating with metals
    • C03C17/09—Surface treatment of glass, not in the form of fibres or filaments, by coating with metals by deposition from the vapour phase
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C03C17/22—Surface treatment of glass, not in the form of fibres or filaments, by coating with other inorganic material

Definitions

  • the present invention relates to a window glass for automobiles.
  • Patent Document 1 an on-vehicle system having an information device such as a camera is mounted in a car to transmit and receive information signals such as road conditions via a window glass (for example, a windshield of a vehicle) (Patent Document 1) reference).
  • Patent Document 1 An on-vehicle system having an information device such as a camera is mounted in a car to transmit and receive information signals such as road conditions via a window glass (for example, a windshield of a vehicle)
  • Patent Document 1 Patent Document 1
  • These in-vehicle systems are becoming more advanced each year, and by analyzing the photographed image of the subject acquired by the camera, it recognizes oncoming vehicles, vehicles in front, pedestrians, traffic signs, lane boundaries, etc. Support for various driving such as
  • the camera of this on-vehicle system is often installed at a position having a shielding layer, such as near the upper center of the windshield.
  • the shielding layer corresponding to the imaging range of the camera is provided with an optical opening as a transmission area for transmitting and receiving the information signal. That is, in many cases, a shielding layer is provided around the transmission region for transmitting and receiving the information signal (see Patent Document 2).
  • the load on the information processing apparatus due to the amount of information to be processed becoming high speed and huge becomes a problem.
  • the problem of heat generation due to an increase in the load on the information processing apparatus can not be avoided. Therefore, in addition to the heat generated by the process, if the heat entering from the outside of the window glass of the car is further received, the camera and the information processing apparatus may overheat, causing a malfunction or failure to operate. .
  • An object of the present invention is to provide a window glass for an automobile capable of reducing a load due to heat to an on-vehicle system including an information transmitting / receiving device such as a camera and an information processing device.
  • the window glass for an automobile is a window glass for an automobile capable of mounting an in-vehicle system for transmitting and receiving signals of radio waves and / or light to the outside of a vehicle.
  • a shielding layer provided along the outer periphery of the plate-like glass member on the inner surface of the vehicle, and the shielding layer has a projecting portion projecting in the in-plane direction from the center of the upper side of the plate-like glass member
  • the projection has an opening including a signal transmission area through which the signal is transmitted as the signal is transmitted and received, and a low radiation layer is formed on the inner surface of the plate-like glass member on the inner surface of the opening. And at least a part of the signal transmission area.
  • the window glass for motor vehicles which can reduce the load by the heat with respect to the vehicle-mounted system provided with an information transmission / reception apparatus including a camera, an information processing apparatus, etc. can be provided.
  • FIG. 2 is a cross-sectional view of the windshield shown in FIG. 1 taken along line XX. It is an enlarged plan view of the upper side center vicinity of another embodiment of the windshield concerning the present invention. It is a top view explaining the example of composition of the low radiation layer of the windshield concerning an embodiment of the present invention. It is a top view explaining another example of composition of a low radiation layer of a windshield concerning an embodiment of the present invention. It is a top view explaining another example of composition of a low radiation layer of a windshield concerning an embodiment of the present invention. It is a sectional view explaining an example of composition of a low radiation layer of a windshield concerning an embodiment of the present invention.
  • composition of a low radiation layer of a windshield concerning an embodiment of the present invention. It is a sectional view explaining another example of composition of a low radiation layer of a windshield concerning an embodiment of the present invention. It is a sectional view explaining another example of composition of a low radiation layer of a windshield concerning an embodiment of the present invention. It is a sectional view explaining another example of composition of a low radiation layer of a windshield concerning an embodiment of the present invention. It is a sectional view explaining another example of composition of a low radiation layer of a windshield concerning an embodiment of the present invention.
  • FIG. 1 is a plan view of an embodiment of a windshield according to the present invention.
  • FIG. 2 is a cross-sectional view of the windshield shown in FIG. 1 taken along line XX.
  • the window glass for an automobile according to the present invention is a window glass for an automobile in which an in-vehicle system for transmitting and receiving radio waves and / or light signals outside the vehicle can be mounted in the vehicle, and applied to front glass, rear glass, side glass, roof glass, etc. Possible, application to the windshield is preferred.
  • the expressions “upper” and “lower” indicate upper and lower sides, respectively, when the window glass for an automobile is mounted on a vehicle.
  • the “upper part” of the automotive window glass is the upper part when the automotive window glass is mounted on the vehicle, and the “lower part” is the automotive window glass mounted on the vehicle The lower part of the case.
  • the "periphery part" of a plate-like glass member means the area
  • the outer peripheral side of the main surface of the plate-like glass member is referred to as the outer side
  • the central side is referred to as the inner side as viewed from the outer periphery.
  • the "end face” of the low radiation layer and the shielding layer means a face connecting one main surface to the other main face, and the "end” means from the end face to the central part of the main surface It refers to the part having a certain width toward the head.
  • the windshield 1 shown in FIG. 1 and FIG. 2 is provided on the plate-like glass member 2 and the inner surface Sa of the plate-like glass member 2 along the outer periphery of the plate-like glass member 2 and visible light And a shielding layer 5 for shielding the
  • the shielding layer 5 has a projection 7 formed to project in the in-plane direction (downward) from the center of the upper side of the plate-like glass member 2.
  • the projecting portion 7 has an opening 4 provided in the central portion with a signal transmission area 3 through which the signal is transmitted in accordance with transmission and reception of the signal of the on-vehicle system.
  • FIG. 1 is a plan view of the windshield 1 as viewed from the inside of the vehicle.
  • the attachment part A of the in-vehicle system is shown by a dotted line in FIG.
  • the attachment portion A is located around the opening 4 of the shielding layer 5.
  • the outline configuration of the in-vehicle system 40 when the in-vehicle system is attached to the windshield 1 is shown by dotted lines in FIG.
  • the in-vehicle system 40 includes an information transmission / reception device 41, an information processing device 42, and a housing 43 that accommodates these.
  • the housing 43 may be attached to the attachment portion A via the adhesive layer 44.
  • the housing 43 may be attached to a bracket (not shown), in which case the bracket may be attached to the attachment portion A via the adhesive layer 44.
  • the shielding layer 5 is provided in a region including at least the mounting portion A of the in-vehicle system of the vehicle inner surface Sa of the plate-like glass member 2.
  • the mount A of the in-vehicle system is usually located at the top of the windshield.
  • the shielding layer 5 includes the mounting portion A and is provided in an area that does not obstruct the driver's view.
  • the shielding layer 5 is provided on the periphery of the sheet glass member 2 on the inner surface Sa of the vehicle. And the shielding layer 5 which has the opening part 4 and which includes the attaching part A is continuously provided with the shielding layer 5 of a peripheral part as the protrusion part 7.
  • FIG. The shielding layer 5 having the peripheral portion 5 and the opening 4 and including the attachment portion A may be separated from each other.
  • the shielding layer 5 may be provided in the form of a band, for example, in the entire peripheral portion for the purpose of concealing the vehicle mounting portion of the windshield 1, but the shielding layer 5 does not necessarily have to be all four sides of the peripheral portion.
  • the shielding layer 5 may be formed on part of the portion.
  • the shielding layer 5 may be made of a conventionally known material such as a black ceramic layer.
  • the thickness of the shielding layer 5 is not particularly limited as long as there is no problem in the visibility.
  • the thickness of the shielding layer 5 is preferably about 8 to 20 ⁇ m, and more preferably 10 to 15 ⁇ m.
  • the plate-like glass member 2 which the windshield 1 has is a laminated glass.
  • the laminated glass which is the plate-like glass member 2 is configured such that the in-vehicle glass plate 2A and the out-of-vehicle glass plate 2B are bonded via the intermediate adhesive layer 2C.
  • symbol of 2 is attached
  • the interior glass plate 2A and the exterior glass plate 2B are also referred to as a glass plate 2A and a glass plate 2B, respectively.
  • the shielding layer 5 is provided on the main surface of the in-vehicle glass plate 2A opposite to the intermediate adhesive layer 2C, that is, on the inner surface Sa of the laminated glass 2.
  • the shielding layer 5 may be provided on the main surface of the outer glass plate 2B on the side of the intermediate adhesive layer 2C, as necessary.
  • the shielding layer 5 may be provided on both the main surface of the in-vehicle glass plate 2A opposite to the intermediate adhesive layer 2C and the main surface on the intermediate adhesive layer 2C side of the external glass plate 2B.
  • the glass plates 2A and 2B in the laminated glass 2 conventionally known glass plates used for window glass of automobiles can be used.
  • the glass plates 2A and 2B are preferably, for example, glass plates manufactured by a known float method. In the float method, a molten glass substrate is floated on a molten metal such as tin, and a glass plate of uniform thickness and width is formed by precise temperature control.
  • the thickness of the glass plates 2A and 2B is not particularly limited, but is preferably 0.5 mm or more and 3.0 mm or less.
  • the thickness of the glass plates 2A and 2B may be the same or different.
  • the thickness of the in-vehicle glass plate 2A is preferably 0.3 mm or more and 2.3 mm or less.
  • the thickness of the in-vehicle glass plate 2A is 0.3 mm or more, the handling property is good, and when it is 2.3 mm or less, the mass of the windshield 1 does not become too large.
  • glass quality (for example, residual stress) can be maintained by making board thickness of glass plate 2A in a car into 0.3 mm or more and 2.3 mm or less.
  • Setting the thickness of the in-vehicle glass plate 2A to 0.3 mm or more and 2.3 mm or less is particularly effective for maintaining the glass quality (e.g., residual stress) in a deeply curved glass plate.
  • 0.5 mm or more and 2.1 mm or less are more preferable, and, as for the plate
  • board thickness of the glass plate 2B outside a vehicle is 1.8 mm or more and 3 mm or less.
  • the thickness of the outside glass plate 2B is 1.8 mm or more, the strength such as anti-flying performance is sufficient, and when it is 3 mm or less, the mass of the windshield 1 does not become too large, and the vehicle fuel efficiency is improved.
  • the plate thickness of the glass plate 2B outside a vehicle 1.8 mm or more and 2.8 mm or less are more preferable, and 1.8 mm or more and 2.6 mm or less are more preferable.
  • the thickness of the glass plates 2A and 2B is not always constant, and may be changed depending on the place as needed.
  • one or both of the glass plates 2A and 2B may be provided with a region in the form of a ridge in cross section in which the thickness on the upper end side in the vertical direction when the windshield 1 is attached to the vehicle is thicker than the lower end side.
  • Glass plate 2A as an example of the composition of glass constituting the 2B is a composition that is displayed in mole percent on the oxide basis, of SiO 2 50 ⁇ 80%, the B 2 O 3 0 ⁇ 10% , Al 2 O 3 0.1 to 25%, Li 2 O + Na 2 O + K 2 O 3 to 30%, MgO 0 to 25%, CaO 0 to 25%, SrO 0 to 5%, BaO 0 to 5%, ZrO
  • the glass include 0 to 5% of 2 and 0 to 5% of SnO 2 , but are not particularly limited.
  • the composition of the intermediate adhesive layer 2C may be one generally used for conventional laminated glass, and for example, polyvinyl butyral (PVB), ethylene vinyl acetal (EVA) or the like can be used.
  • PVB polyvinyl butyral
  • EVA ethylene vinyl acetal
  • a thermosetting resin that is liquid before heating may be used as a constituent material of the intermediate adhesive layer 2C.
  • the information transmitting and receiving device 41 illustrated in FIG. 2 is, for example, a camera or a sensor.
  • the opening 4 in the protrusion 7 is a signal transmission area 3 through which a signal is transmitted when the information transmitting / receiving device 41 transmits / receives a signal of radio waves (300 MHz-10 GHz) and / or light (380 nm-1100 nm).
  • a signal of radio waves 300 MHz-10 GHz
  • 380 nm-1100 nm 380 nm-1100 nm.
  • Provided to secure the Radio waves include millimeter waves (30 to 300 GHz).
  • the signal transmission area 3 is also applicable to applications in which the information transmitting and receiving device 41 transmits and receives millimeter wave signals.
  • the shape and area of the signal transmission area 3 are determined by the information transmission / reception device 41.
  • the signal transmission region 3 has a configuration in which the shielding layer 5 is not provided on the plate-like glass member 2, and the transmission characteristics of radio waves, light and the like are the transmission characteristics of the plate-like glass member 2 such as radio waves and light Is the same as
  • the solar light transmittance (Te) of the plate-like glass member 2 is 60% or less and the visible light transmittance (Tv) is 70% or more.
  • the solar radiation transmittance (Te) is more preferably 55% or less, and particularly preferably 48% or less.
  • the solar reflectance (Re) is more preferably 5% or more, and particularly preferably 7% or more.
  • the visible light transmittance (Tv) is more preferably 72% or more, and particularly preferably 73% or more.
  • the haze value of the signal transmission region 3 is preferably 1.0% or less, more preferably 0.8% or less, and particularly preferably 0.6% or less.
  • the solar radiation transmittance (Te), the solar radiation reflectance (Re), and the visible light transmittance (Tv) are measured with a spectrophotometer or the like for the transmittance and reflectance in a wavelength range including at least 300 to 2100 nm, These are values calculated from the formulas defined in JIS R3106 (1998) and JIS R3212 (1998), respectively.
  • the solar radiation transmittance, the solar radiation reflectance and the visible light transmittance are the solar radiation transmittance (Te), the solar radiation reflectance (Re) and the visible light measured and calculated by the above-mentioned method. Permeability (Tv).
  • visible light transmittance (Tv), solar radiation transmittance (Te), solar radiation reflectance (Re), and haze value are not particularly limited, and can be the same as the plate-like glass member 2 as described above.
  • the infrared transmittance specifically, the average transmittance at 600 to 1100 nm measured by a spectrophotometer or the like is preferably 30% or more, and more preferably 40% or more. .
  • the infrared transmittance is a characteristic required for the signal transmission area 3. Therefore, only the signal transmission region 3 of the plate-like glass member 2 may be changed to a characteristic different from the region other than the signal transmission region 3 in accordance with the characteristics required for the signal transmission region 3.
  • the constituent material of the intermediate adhesive layer 2C can be changed from the above-described materials as appropriate.
  • the intermediate adhesive layer 2C at a portion corresponding to the signal transmission region 3 may be hollowed out to be an intermediate adhesive layer different from the region other than the signal transmission region 3.
  • the signal transmission area 3 of the plate-like glass member 2 may be coated with a water repellent function, a hydrophilic function, an antifogging function, a heat shielding function, an electrothermal function, and the like.
  • the opening 4 is provided so as to include the entire area of the signal transmission area 3 in the area of the opening 4.
  • the opening 4 is an area larger than the signal transmission area 3.
  • the size of the opening 4 is such that the low radiation layer 6 described below can be disposed between the outer circumference of the opening 4 and the outer circumference of the signal transmission region 3.
  • the shape of the opening 4 is not particularly limited.
  • the shape of the opening 4 may be, for example, a similar shape to the shape of the signal transmission region 3 or a shape different from the similar shape.
  • FIG. 3 shows an enlarged plan view of the vicinity of the center on the upper side in a modification of the windshield 1 in which the shielding layer 5 is not present below the opening 4.
  • the region surrounded by the phantom line connecting the lowermost ends of both sides of the opening 4 and the shielding layer 5 is the region of the opening 4 It is. That is, even if there is no lower shielding layer 5 in the opening 4, the region surrounded by the phantom line connecting the lowermost ends of both sides of the opening 4 and the shielding layer 5 The whole area is included in the area.
  • the protrusion part 7 in which the opening part 4 is formed should just have the opening part 4, and the area and the shape in particular are not limited.
  • the low radiation layer 6 is provided along at least a part of the periphery of the opening 4 and provided so as to surround at least a part of the signal transmission area 3.
  • the low radiation layer 6 has the effect of suppressing the propagation of heat to the in-vehicle system 40.
  • the in-vehicle system 40 is fixed on the shielding layer 5 by, for example, the housing 43 being bonded to the mounting portion A. This is to improve the design by concealing the place where the in-vehicle system 40 is fixed, to prevent the deterioration of the adhesive layer 44 used in the place to be fixed, and further to shield more than the surface of the plate-like glass member 2. It is because it can be fixed more stably on the surface of 5.
  • the in-vehicle system 40 when the in-vehicle system 40 is fixed on the shielding layer 5 as described above, the distance between the in-vehicle system 40 and the shielding layer 5 becomes short, and the thermal energy absorbed by the shielding layer 5 passes through the opening 4. It becomes easy to propagate to 40.
  • the information transmitting / receiving device 41 is a camera
  • the closer the camera is to the plate-like glass member 2 the larger the viewing angle of the camera with respect to the opening 4 of the same size.
  • a means for making the space between the camera and the plate-like glass member 2 a sealed structure is realistic, but then the heat does not escape from the space. It becomes a factor which gives a load. Therefore, the opening 4 needs measures to suppress such heat propagation to the in-vehicle system 40.
  • the low radiation layer 6 By providing the low radiation layer 6 so as to surround at least a part of the signal transmission region 3, the heat energy absorbed by the shielding layer 5 is prevented from propagating to the information transmission / reception device 41 or the information processing device 42 through the opening 4. it can.
  • the low radiation layer 6 is preferably provided in a region corresponding to 10 to 100% of the entire circumference of the signal transmission region 3 so as to surround the signal transmission region 3. More preferably, they are provided so as to surround the entire circumference of the region 3.
  • the low radiation layer 6 is provided to surround the signal transmission region 3 and along at least a part of the periphery of the opening 4 of the shielding layer 5.
  • the heat propagation suppressing effect by the low radiation layer 6 is larger as the area of the low radiation layer 6 is the same when the thickness of the low radiation layer 6 is the same. Therefore, in order to exert the maximum effect, it is preferable to provide the low radiation layer 6 in the entire region between the outer periphery of the signal transmission region 3 and the outer periphery of the opening 4. On the other hand, in order to ensure the signal transmission area 3 reliably, it is preferable that the low radiation layer 6 be provided at a predetermined distance from the outer periphery of the signal transmission area 3.
  • the low radiation layer 6 is preferably, for example, a low radiation layer configured as shown in plan view in FIG.
  • the low radiation layer 6 shown in FIG. 4 is configured to surround the entire periphery of the signal transmission region 3, the outer periphery of the low radiation layer 6 is in contact with the outer periphery of the opening 4, and the inner periphery of the low radiation layer 6 is a signal transmission region It is provided at a predetermined distance from the outer periphery of 3.
  • the shielding layer 5 does not exist under the opening 4 as in the windshield 1 shown in FIG. 3, the low radiation layer 6 is provided along three sides of the boundary of the opening 4 with the shielding layer 5. It is also good.
  • the low radiation layer 6 is configured to surround the outer periphery other than the lower part of the signal transmission region 3.
  • the width w of the low radiation layer 6 is preferably 3 to 20 mm.
  • the width w is more preferably 5 to 15 mm.
  • the width w of the low radiation layer 6 refers to the distance between the outer circumference and the inner circumference of the low radiation layer 6, and matches the width from the outer circumference of the opening 4 of the shielding layer 5 toward the signal transmission region 3.
  • the distance L between the inner periphery of the low radiation layer 6 and the outer periphery of the signal transmission region 3 is preferably 5 mm or more as the distance L min at the shortest distance, and the distance L at the longest distance is 20 mm or less is preferable as max .
  • the thickness T of the low radiation layer 6 depends on the constituent material or manufacturing method of the low radiation layer 6.
  • the thickness of the low radiation layer 6 is preferably 150 to 250 nm in the case of a vapor deposition film typically manufactured by sputtering, and is preferably 3 to 20 ⁇ m in the case of a silver paste fired film. In the present specification, the thickness of the low radiation layer 6 is the maximum thickness in the region where the low radiation layer 6 is provided.
  • the emissivity of the low radiation layer 6 is preferably 0.8 or less, more preferably 0.5 or less, still more preferably 0.2 or less, and particularly preferably 0.1 or less.
  • the emissivity of the low radiation layer 6 can be measured by the method defined in JIS R3106.
  • the low emission layer 6 is preferably made of metal or metal oxide. Silver is preferred as the metal.
  • the metal oxide is preferably tin-doped indium oxide (ITO).
  • the low radiation layer 6 is preferably made of, for example, a low radiation film such as a silver paste fired film or an ITO film.
  • the low emission layer 6 may be formed of a silver-based multilayer film laminated so that a metal layer containing silver as a main component (hereinafter, also referred to as a silver layer) is sandwiched between dielectric layers.
  • the dielectric layer in the silver-based multilayer film is a layer made of a material mainly composed of metal oxides, nitrides, oxynitrides and the like.
  • the ITO film or the silver-based multilayer film is, for example, a film manufactured by a sputtering method.
  • the low radiation layer 6 can be suitably used if it is a low radiation film.
  • the low radiation layer 6 is preferably a silver paste fired film from the viewpoint of easy formation of a film selectively in a desired region and in terms of cost.
  • the low radiation layer 6 may be provided in a frame shape so as to surround the entire circumference of the signal transmission region 3 in order to enhance the heat propagation suppressing effect as in the low radiation layer 6 shown in FIG. 4. Further, as shown in the plan view of FIG. 5, as a shape in which one part of the frame shape of the low radiation layer 6 shown in FIG. 4 is cut, it is possible to conduct electricity by connecting with an energizing mechanism such as an external power source. It is also good.
  • the low radiation layer 6 shown in FIG. 5 is, for example, in an environment where the outside temperature is low and the sheet glass member 2 is easily fogged and / or easily iced by connecting the two ends to an external power supply.
  • the low radiation layer 6 shown in FIG. 5 for example, when the two end portions are connected to the external power supply and held in the energized state, the plate-like glass member 2 around the signal transmission region 3 is broken. In this case, it is preferable that the low radiation layer 6 is broken because the breakage can be detected.
  • the low radiation layer 6 is formed such that the film thickness of the region near the signal transmission region 3 is thinner than the film thickness of the other regions, or the region near the signal transmission region 3 is formed by a dot pattern. It does not matter.
  • FIG. 6 is a plan view showing an example of the low emission layer 6 formed so that the area near the signal transmission area 3 is formed by a dot pattern.
  • the low radiation layer 6 shown in FIG. 6 can be made the same as the low radiation layer 6 shown in FIG. 4 except that the region near the signal transmission region 3 is formed by a dot pattern.
  • the shape of the dots in the dot pattern is not limited to a circle, but may be an ellipse, a rectangle, a polygon, a star, or the like.
  • the dot portion may be transparent to form a dot pattern in which the low emission layer is provided in the other portion.
  • the windshield 1 shown in FIGS. 1, 2 and 3 is an example in which the low radiation layer 6 is formed in contact with the inner surface Sa of the plate-like glass member 2.
  • the low radiation layer 6 is formed on the inner surface Sa of the sheet glass member 2 as long as it is provided along at least a part of the periphery of the opening 4 and surrounding at least a part of the signal transmission region 3. It may be formed to be in contact with the inner surface of the shielding layer 5 as described above. That is, in the present invention, "the low radiation layer is provided on the inner surface of the plate glass member" includes the case where another layer is present between the low radiation layer and the inner surface of the plate glass member. .
  • the planar shape is a frame shape or a shape in which a frame shape is cut at one place as in FIGS. 4 and 5, but the low radiation layer 6 having a size whose inner periphery matches the outer periphery of the opening 4 May be provided on the inner surface of the shielding layer 5 so that the inner circumference matches the outer circumference of the opening 4.
  • the low radiation layer 6 shown in FIG. 6 may be provided on the inner surface of the shielding layer 5 so that the inner circumference thereof coincides with the outer circumference of the opening 4, but the effect of the dot pattern is not exhibited. Unfavorable from the point of productivity.
  • the dot pattern is provided on the outside as shown in FIG. Is preferred.
  • FIGS. 7, 8, 9, 10 and 11 show vertical cross-sectional views in the vicinity of the opening 4 in the upper part of the windshield 1 in each configuration example.
  • the planar shape of the low radiation layer 6 is, for example, a frame-like shape similar to that shown in FIG. 4.
  • the low radiation layer 6 shown in FIG. 7 is provided such that the inner end face faces the outer periphery of the signal transmission region 3 such that the outer end face is in contact with the end face of the shielding layer 5.
  • the low radiation layer 6 shown in FIG. 7 is configured to have a substantially uniform thickness T throughout the layer.
  • the thickness T, the width w, and the distance L between the inner end face of the low radiation layer 6 shown in FIG. 7 and the outer periphery of the signal transmission region 3 can be the same as described above.
  • the windshield 1 shown in FIG. 8 is a configuration example in which the low radiation layer 6 is provided to cover the end of the shielding layer 5.
  • the low radiation layer 6 shown in FIG. 8 is positioned such that the outer end face is located on the inner surface of the shielding layer 5 beyond the end surface of the shielding layer 5, in other words, the outer end is the inner end of the shielding layer 5
  • the inner end face is provided to face the outer periphery of the signal transmission area 3.
  • the portion provided on the inner end of the shielding layer 5 of the low radiation layer 6 is formed to have a thickness t1 substantially the same as the thickness T of the other portions.
  • the planar shape of the low radiation layer 6 shown in FIG. 8 is, for example, a frame-like shape, and is wider than the low radiation layer 6 shown in FIG. When the low radiation layer 6 has the cross-sectional shape shown in FIG. 8, the shape of the plane viewed from the vehicle outer side looks the same as the low radiation layer 6 having the cross-sectional shape shown in FIG. Is the same.
  • the thickness T of the low radiation layer 6 shown in FIG. 8 and the distance L between the inner end face and the outer periphery of the signal transmission region 3 can be the same as described above.
  • the width w of the low radiation layer 6 shown in FIG. 8 can be made larger than the above width by the width ws of the overlapping portion of the end.
  • the width ws of the overlapping portion of the end is preferably, for example, about 2 to 5 mm.
  • the thickness t1 of the low radiation layer 6 at the overlapping portion of the end portions is preferably about 3 to 20 ⁇ m as in the case of the thickness T.
  • the low radiation layer 6 shown in FIG. 8 is provided so as to cover the end of the shielding layer 5 so that the thermal energy absorbed by the shielding layer 5 can be more effectively transmitted through the opening 4 to the camera or the like. It is possible to suppress propagation to the on-vehicle system 40 including the above.
  • the outer end face of the low radiation layer 6 may be in contact with the end face of the shielding layer 5 as described above.
  • the outer end may be superimposed on the inner end of the shielding layer 5.
  • the planar shape of the low radiation layer 6 is, for example, a frame-like shape similar to that shown in FIG. The sizes are approximately the same.
  • the low radiation layer 6 shown in FIG. 9 is provided on the inner surface of the shielding layer 5 so that the position of the inner end face substantially coincides with the position of the inner end face of the shielding layer 5 and the whole overlaps the shielding layer 5. ing. That is, in the configuration shown in FIG. 9, the low radiation layer 6 is not provided in the opening 4. That is, when the low radiation layer 6 has the cross-sectional shape shown in FIG. 9, the low radiation layer 6 can not be visually recognized from the vehicle outer side, which is preferable in terms of design.
  • the opening 4 and the signal transmission region 3 may have substantially the same area.
  • the low radiation layer 6 be provided at a predetermined distance L from the outer periphery of the signal transmission region 3. Therefore, also in the configuration shown in FIG. 9, the distance L between the inner periphery of the low radiation layer 6 and the outer periphery of the signal transmission region 3 is preferably 5 mm or more as the distance L min at the shortest distance. 20 mm or less is preferable as distance Lmax of the location of the largest distance.
  • the width w of the low radiation layer 6 is the distance between the outer circumference and the inner circumference of the low radiation layer 6, and can be appropriately adjusted according to the formation region of the shielding layer 5.
  • the width w of the low radiation layer 6 can be preferably 3 to 50 mm, more preferably 5 to 30 mm.
  • the width w of the low radiation layer 6 may be the same or different throughout the frame shape.
  • the width w of the low radiation layer 6 in the lower part may be set smaller than the width w of the low radiation layer 6 in the upper part and the left and right sides according to the formation region of the shielding layer 5.
  • the attachment part A of the vehicle-mounted system 40 and the formation area of the low radiation layer 6 do not overlap from an adhesive viewpoint.
  • the thickness T of the low radiation layer 6 is preferably 150 to 250 nm in the case of the vapor deposition film as described above, and is preferably 3 to 20 ⁇ m in the case of the silver paste fired film.
  • the low radiation layer 6 needs to be provided on the vehicle inner side than the shielding layer 5. For example, in the configuration in which the low radiation layer 6 is interposed between the two shield layers 5, thermal energy is transmitted from the vehicle outer shield layer 5 to the vehicle inner shield layer 5 via the low radiation layer 6. is there.
  • the planar shape of the low radiation layer 6 is, for example, a frame shape, and the inner periphery thereof has a size that substantially matches the outer periphery of the opening 4.
  • the low radiation layer 6 shown in FIG. 10 is provided on the inner surface of the shielding layer 5 so that the position of the inner end face substantially coincides with the position of the inner end face of the shielding layer 5 and the whole overlaps the shielding layer 5. ing.
  • the low radiation layer 6 shown in FIG. 10 is an example in which a region separated from the outer periphery of the opening 4 is formed in a dot pattern.
  • the shape of the dots in the dot pattern can be the same as described above.
  • the dot pattern has a configuration in which the width of the dots decreases (w4 ⁇ w3 ⁇ w2) as the distance from the outer periphery of the opening 4 increases and the distance between the dots increases.
  • the area indicated by the width w1 in the low radiation layer 6 is an area where no dot is formed. That is, in the low radiation layer 6 shown in FIG. 10, the area of the dot formation area decreases as the distance from the outer periphery of the opening 4 increases, and the area of the area in which the dots are not formed increases. In other words, the low emission layer 6 shown in FIG.
  • the 10 is configured such that the proportion of the area in which the low emission layer 6 covers the shielding layer 5 decreases as the distance from the outer periphery of the opening 4 increases.
  • the reduction of the area percentage may be gradual or continuous.
  • the width w and thickness T of the low radiation layer 6 shown in FIG. 10, and the distance L between the inner end face and the outer periphery of the signal transmission region 3 can be the same as those described for the low radiation layer 6 shown in FIG.
  • the planar shape of the low radiation layer 6 is, for example, a frame shape in which the outer periphery and the inner periphery substantially match the low radiation layer 6 shown in FIG. Similar to the radiation layer 6, it is provided on the inner surface of the shielding layer 5.
  • the thickness of the low radiation layer 6 shown in FIG. 11 is configured such that the area away from the opening 4 is smaller than the area closer to the opening 4. Specifically, when the height (thickness) of the inner end face of the low radiation layer 6 is T and the height (thickness) of the outer end face is t2, the relationship of T> t2 is satisfied.
  • the low radiation layer 6 shown in FIG. 11 has a configuration in which the thickness decreases with distance from the outer periphery of the opening 4.
  • the reduction of the thickness of the low radiation layer 6 may be stepwise or continuous.
  • the width w of the low radiation layer 6 shown in FIG. 11 and the distance L between the inner end face and the outer periphery of the signal transmission region 3 can be the same as those described for the low radiation layer 6 shown in FIG.
  • the area where the low radiation layer 6 is separated from the outer periphery of the opening 4 is constituted by a dot pattern, and the area ratio of the low radiation layer 6 covering the shielding layer 5 is the area of the opening 4.
  • the configuration in which the thickness of the low-emission layer 6 decreases with distance from the outer periphery of the opening 4 may be combined with the configuration in which the distance decreases with distance from the outer periphery.
  • the ratio of the area covering the shielding layer 5 of the low radiation layer 6 formed on the inner surface of the shielding layer 5 is formed so as to decrease with distance from the outer periphery of the opening 4
  • the configuration or the thickness of the low radiation layer 6 formed on the inner surface of the shielding layer 5 may be reduced as the distance from the outer periphery of the opening is reduced, or by combining these configurations.
  • the radiation of heat energy can be effectively prevented.
  • even if there exists a thermal expansion coefficient difference of the shielding layer 5 and the low radiation layer 6, the residual stress which arises in the plate-like glass member 2 is reduced by applying to the windshield 1 these structures individually or in combination. And impact resistance can be improved.
  • the attachment of the in-vehicle system to the automobile window glass of the present invention can be performed as described above, for example, as shown in FIG. That is, the in-vehicle system 40 is fixed on the shielding layer 5 by, for example, an adhesive or the like by means such as engagement.
  • a sealing portion may be provided to seal the space between the information transmitting and receiving device 41 such as a camera and the inner main surface of the flat glass member 2.
  • the sealing portion may be shaped according to the outer diameter width of the information transmission / reception device 41, or may be shaped so as to seal the entire space formed between the in-vehicle system 40 and the sheet glass member 2 .
  • the space between the information transmitting / receiving device 41 and the plate-like glass member 2 is a sealed space, there is no circulation of air with the outside, and the temperature of the vehicle interior
  • the environment is not affected by changes in humidity. Therefore, fogging such as condensation does not easily occur on the lens surface of the information transmitting / receiving device 41 such as a camera or the signal transmission region 3.
  • it is very important to suppress the propagation of thermal energy to the space itself, since thermal energy from the outside does not escape.
  • the vehicle window glass of the present embodiment can effectively suppress the propagation of thermal energy by providing the low radiation layer around the opening of the shielding layer.
  • the sealed space obtained by sealing by a sealing part is desirable for the sealed space obtained by sealing by a sealing part to be pressure-reduced. Depressurization can reduce the moisture that may be present in the enclosed space.
  • a liquid or gel body having a refractive index of ⁇ 10% or less with respect to the plate-like glass member 2 may be filled in a sealed space obtained by being sealed by a seal portion.
  • the liquid or gel is, for example, a matching oil or gel, and is a refractive index matching agent. By filling a liquid or gel, it is possible to remove moisture in the enclosed space.
  • the automotive glazing of the present invention can be manufactured by commonly known techniques.
  • the method of manufacturing a window glass for an automobile according to the present invention will be described below with reference to a windshield 1 shown in FIG. 1 as an example.
  • the plate-like glass member 2 is a laminated glass.
  • the intermediate adhesive layer 2C is inserted between the in-vehicle glass plate 2A and the out-of-vehicle glass plate 2B to prepare a laminated glass precursor which is laminated glass before pressure bonding.
  • the laminated glass precursor is placed in a vacuum bag, such as a rubber bag, and the vacuum bag is connected to an exhaust system.
  • this pre-bonded laminated glass precursor is placed in an autoclave, and heat and pressure are applied under the conditions of a temperature of about 120 to 150 ° C. and a pressure of about 0.98 to 1.47 MPa to perform main bonding (main pressure bonding) Thereby, the laminated glass 2 can be obtained.
  • the shielding layer 5 made of black ceramic is formed by a conventionally known method. Specifically, a black ceramic paste obtained by adding a powder of heat-resistant black pigment to a resin and a solvent together with a low melting point glass powder and kneading it by printing etc. And a black ceramic layer formed by heating and baking.
  • the black pigment used to form the black ceramic layer also includes a combination of pigments that turns black by the combination of a plurality of colored pigments.
  • the thickness of the shielding layer 5 is as described above.
  • the low radiation layer 6 When using a silver paste fired film as the low radiation layer 6, it can be formed by applying the silver paste to a predetermined region of the inner surface Sa of the laminated glass 2 by printing or the like, and heating and baking it.
  • the silver paste can be prepared, for example, by adding silver powder and low melting point glass powder to a resin and a solvent and kneading them. In the silver paste, the ratio of the silver powder to the low melting point glass powder is appropriately adjusted so as to obtain the emissivity required for the low radiation layer 6 to be obtained.
  • the shielding layer 5 and the low radiation layer 6 can be simultaneously subjected to heating and baking after printing a black ceramic paste to be the shielding layer 5 and a silver paste to be the low radiation layer 6 respectively.
  • the printing of the black ceramic paste and the printing of the silver paste may be performed first if the low radiation layer 6 and the shielding layer 5 do not have an overlapping portion according to the above-described embodiment, but usually First perform printing of the black ceramic paste.
  • the black ceramic paste and the printing of the silver paste can be simultaneously performed, they may be performed simultaneously. If necessary, the black ceramic paste may be printed and fired to form the shielding layer 5, and then the silver paste may be printed and fired to form the low emission layer 6.
  • the silver-based multilayer film and the ITO film can be typically formed by sputtering.
  • a film forming method for example, physical vapor deposition (vacuum vapor deposition, ion plating) other than sputtering, chemical vapor deposition (thermal CVD, plasma CVD, photo CVD), ion beam sputtering, etc. May apply.
  • the shielding layer 5 is formed, masking is performed to selectively form the low emission layer 6 in a predetermined region, and then the low emission layer 6 is formed.
  • a viscous silver paste can be easily applied to a predetermined region without masking, which is preferable.
  • the window glass according to the embodiment of the present invention has been described by taking the windshield as an example using the drawings and the like, the window glass of the present invention is not limited thereto.
  • the design may be changed or modified without departing from the spirit and scope of the present invention.
  • the window glass for vehicles of the present invention is a window glass for vehicles which transmits / receives an information signal, and is suitably used for a window glass for vehicles which carries an information processor inside a vehicle, especially a windshield.

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Abstract

Provided is a windshield for automobiles capable of reducing the load that is caused by heat and that is exerted on information processing devices and information transmission/reception devices such as a camera. This window glass is for automobiles and enables installation of, within the cabin, an in-vehicle system for performing transmission and reception of electrical-wave signals and/or optical signals with the outside of the vehicle. The window glass for automobiles is characterized by having a plate-like glass member and a shielding layer disposed on the cabin-side surface of the plate-like glass member so as to be positioned along the outer perimeter of the plate-like glass member, wherein: the shielding layer has a projecting part that projects in an in-plane direction from the center of the upper edge of the plate-like glass member; the projecting part has an opening having a signal transmission region for allowing the aforementioned signals to pass therethrough during the transmission/reception of said signals; and a low radiation layer is disposed on the cabin-side surface of the plate-like glass member so as to be positioned along at least a part of the outer perimeter of the opening and to enclose at least a part of the signal transmission region.

Description

自動車用窓ガラスAutomotive window glass
　本発明は、自動車用窓ガラスに関する。 The present invention relates to a window glass for automobiles.
　近年、カメラ等の情報デバイスを有する車載システムを車内に搭載して窓ガラス（例えば車両のフロントガラス）を介して、道路状況等の情報信号の送受信を行うことが知られている（特許文献１参照）。これらの車載システムは年々高度化しており、カメラにより取得した被写体の撮影画像を解析することで、対向車、前走車、歩行者、交通標識、車線境界線等を認識し、運転者に危険を知らせる等の様々な運転の支援を行うことができる。 In recent years, it has been known that an on-vehicle system having an information device such as a camera is mounted in a car to transmit and receive information signals such as road conditions via a window glass (for example, a windshield of a vehicle) (Patent Document 1) reference). These in-vehicle systems are becoming more advanced each year, and by analyzing the photographed image of the subject acquired by the camera, it recognizes oncoming vehicles, vehicles in front, pedestrians, traffic signs, lane boundaries, etc. Support for various driving such as
　また、この車載システムのカメラは、フロントガラスの中央上部近傍等、遮蔽層を有する位置に設置されるケースが多い。その場合、カメラの撮影範囲に対応する遮蔽層には、情報信号を送受信するための透過領域として、光学的開口部が設けられる。すなわち、情報信号を送受信するための透過領域の周囲には遮蔽層が設けられている場合が多い（特許文献２参照）。 In addition, the camera of this on-vehicle system is often installed at a position having a shielding layer, such as near the upper center of the windshield. In that case, the shielding layer corresponding to the imaging range of the camera is provided with an optical opening as a transmission area for transmitting and receiving the information signal. That is, in many cases, a shielding layer is provided around the transmission region for transmitting and receiving the information signal (see Patent Document 2).
特開２０１６－１０７７５５号公報JP, 2016-107755, A 特開２００６－３２７３８１号公報JP, 2006-327381, A
　ところで、特許文献１や特許文献２のようにカメラ等の情報デバイスを車内に搭載する場合、カメラで得られた画像情報等を計算処理したり、通信を行ったりするためにカメラに加えて情報処理装置を併せて設けた車載システムとする場合が多い。近年はカメラで得られた情報から瞬時に衝突を抑制する機構を作動させたり、運転者の運転操作を補助する機能を持たせたり、とカメラで得られた情報の処理は益々重要かつ高度になってきている。 Incidentally, when an information device such as a camera is mounted in a car as in Patent Document 1 and Patent Document 2, information is added to the camera in order to perform calculation processing and communication of image information obtained by the camera and the like. In many cases, an in-vehicle system is provided in which a processing device is also provided. In recent years, processing of the information obtained by the camera to activate the mechanism that suppresses the collision instantaneously from the information obtained by the camera, and to provide the function to assist the driver's driving operation, and more importantly and highly It has become to.
　その一方で、処理する情報量が高速かつ膨大になってくることによる情報処理装置への負荷が問題となってくる。他の家庭用のコンピュータと同様に、情報処理装置の負荷が大きくなることによる発熱の問題は避けられない。そのため、処理により発生した熱に加え、自動車の窓ガラスの外側から入り込む熱をさらに受けてしまった場合、カメラや情報処理装置がオーバーヒートし、誤作動を起こしたり動作しなくなったりする問題があった。 On the other hand, the load on the information processing apparatus due to the amount of information to be processed becoming high speed and huge becomes a problem. As with other home-use computers, the problem of heat generation due to an increase in the load on the information processing apparatus can not be avoided. Therefore, in addition to the heat generated by the process, if the heat entering from the outside of the window glass of the car is further received, the camera and the information processing apparatus may overheat, causing a malfunction or failure to operate. .
　本発明は、カメラをはじめとする情報送受信装置および情報処理装置等を備える車載システムへの熱による負荷を低減可能な自動車用窓ガラスを提供することを目的とする。 An object of the present invention is to provide a window glass for an automobile capable of reducing a load due to heat to an on-vehicle system including an information transmitting / receiving device such as a camera and an information processing device.
　本発明の自動車用窓ガラスは、車外と電波および／または光の信号の送受信を行う車載システムを車内に取り付け可能な自動車用窓ガラスであって、板状ガラス部材と、前記板状ガラス部材の車内面上に、前記板状ガラス部材の外周に沿って設けられた遮蔽層と、を有し、前記遮蔽層は、前記板状ガラス部材の上辺中央から面内方向に突出する突出部を有し、前記突出部は、前記信号の送受信にともない該信号が透過する信号透過領域を備える開口部を有し、低放射層が、前記板状ガラス部材の車内面上に、前記開口部の外周の少なくとも一部に沿うように、かつ前記信号透過領域の少なくとも一部を取り囲むように設けられていることを特徴とする。 The window glass for an automobile according to the present invention is a window glass for an automobile capable of mounting an in-vehicle system for transmitting and receiving signals of radio waves and / or light to the outside of a vehicle. A shielding layer provided along the outer periphery of the plate-like glass member on the inner surface of the vehicle, and the shielding layer has a projecting portion projecting in the in-plane direction from the center of the upper side of the plate-like glass member The projection has an opening including a signal transmission area through which the signal is transmitted as the signal is transmitted and received, and a low radiation layer is formed on the inner surface of the plate-like glass member on the inner surface of the opening. And at least a part of the signal transmission area.
　本発明によれば、カメラをはじめとする情報送受信装置および情報処理装置等を備える車載システムへの熱による負荷を低減可能な自動車用窓ガラスを提供できる。 ADVANTAGE OF THE INVENTION According to this invention, the window glass for motor vehicles which can reduce the load by the heat with respect to the vehicle-mounted system provided with an information transmission / reception apparatus including a camera, an information processing apparatus, etc. can be provided.
本発明に係るフロントガラスの一実施形態の平面図である。It is a top view of one embodiment of a windshield concerning the present invention. 図１に示すフロントガラスのＸ－Ｘ線における断面図である。FIG. 2 is a cross-sectional view of the windshield shown in FIG. 1 taken along line XX. 本発明に係るフロントガラスの別の実施形態の上辺中央付近の拡大平面図である。It is an enlarged plan view of the upper side center vicinity of another embodiment of the windshield concerning the present invention. 本発明の実施形態に係るフロントガラスの低放射層の構成例を説明する平面図である。It is a top view explaining the example of composition of the low radiation layer of the windshield concerning an embodiment of the present invention. 本発明の実施形態に係るフロントガラスの低放射層の別の構成例を説明する平面図である。It is a top view explaining another example of composition of a low radiation layer of a windshield concerning an embodiment of the present invention. 本発明の実施形態に係るフロントガラスの低放射層の別の構成例を説明する平面図である。It is a top view explaining another example of composition of a low radiation layer of a windshield concerning an embodiment of the present invention. 本発明の実施形態に係るフロントガラスの低放射層の構成例を説明する断面図である。It is a sectional view explaining an example of composition of a low radiation layer of a windshield concerning an embodiment of the present invention. 本発明の実施形態に係るフロントガラスの低放射層の別の構成例を説明する断面図である。It is a sectional view explaining another example of composition of a low radiation layer of a windshield concerning an embodiment of the present invention. 本発明の実施形態に係るフロントガラスの低放射層の別の構成例を説明する断面図である。It is a sectional view explaining another example of composition of a low radiation layer of a windshield concerning an embodiment of the present invention. 本発明の実施形態に係るフロントガラスの低放射層の別の構成例を説明する断面図である。It is a sectional view explaining another example of composition of a low radiation layer of a windshield concerning an embodiment of the present invention. 本発明の実施形態に係るフロントガラスの低放射層の別の構成例を説明する断面図である。It is a sectional view explaining another example of composition of a low radiation layer of a windshield concerning an embodiment of the present invention.
　以下に、本発明の実施の形態を説明する。なお、本発明は、これらの実施形態に限定されるものではなく、これらの実施形態を、本発明の趣旨および範囲を逸脱することなく、変更または変形することができる。 Hereinafter, embodiments of the present invention will be described. The present invention is not limited to these embodiments, and these embodiments can be modified or changed without departing from the spirit and scope of the present invention.
　図１は本発明に係るフロントガラスの一実施形態の平面図である。図２は図１に示すフロントガラスのＸ－Ｘ線における断面図である。本発明の自動車用窓ガラスは、車外と電波および／または光の信号の送受信を行う車載システムを車内に取り付け可能な自動車用窓ガラスであって、フロントガラス、リヤガラス、サイドガラス、ルーフガラス等に適用可能であり、フロントガラスへの適用が好適である。 FIG. 1 is a plan view of an embodiment of a windshield according to the present invention. FIG. 2 is a cross-sectional view of the windshield shown in FIG. 1 taken along line XX. The window glass for an automobile according to the present invention is a window glass for an automobile in which an in-vehicle system for transmitting and receiving radio waves and / or light signals outside the vehicle can be mounted in the vehicle, and applied to front glass, rear glass, side glass, roof glass, etc. Possible, application to the windshield is preferred.
　本明細書において「上」および「下」の表記は、自動車用窓ガラスを車両に搭載した際のそれぞれ上および下を示す。自動車用窓ガラスの「上部」とは、自動車用窓ガラスが車両に搭載された場合の上側の部分のことであり、また、その「下部」とは、自動車用窓ガラスが車両に搭載された場合の下側の部分のことである。 In the present specification, the expressions "upper" and "lower" indicate upper and lower sides, respectively, when the window glass for an automobile is mounted on a vehicle. The "upper part" of the automotive window glass is the upper part when the automotive window glass is mounted on the vehicle, and the "lower part" is the automotive window glass mounted on the vehicle The lower part of the case.
　また、本明細書において、板状ガラス部材の「周縁部」とは、板状ガラス部材の外周から主面の中央部に向かって、ある一定の幅を有する領域を意味する。本明細書において、板状ガラス部材の主面において中央部から見て外周側を外側、外周からみて中央部側を内側という。本明細書において、低放射層および遮蔽層の「端面」とは、一方の主面と他方の主面とを接続する面をいい、「端部」とは、端面から主面の中央部に向かってある一定の幅を有する部分をいう。 Moreover, in this specification, the "periphery part" of a plate-like glass member means the area | region which has a certain fixed width toward the center part of the main surface from the outer periphery of a plate-like glass member. In the present specification, the outer peripheral side of the main surface of the plate-like glass member is referred to as the outer side, and the central side is referred to as the inner side as viewed from the outer periphery. In the present specification, the "end face" of the low radiation layer and the shielding layer means a face connecting one main surface to the other main face, and the "end" means from the end face to the central part of the main surface It refers to the part having a certain width toward the head.
　図１および図２に示す、フロントガラス１は、板状ガラス部材２と、板状ガラス部材２の車内面Ｓａ上であって、板状ガラス部材２の外周に沿って設けられた、可視光を遮蔽する遮蔽層５を有する。遮蔽層５は、板状ガラス部材２の上辺中央から面内方向（下方）に向けて突出するように形成された突出部７を有する。突出部７は、中央部に車載システムの信号の送受信にともない該信号が透過する信号透過領域３を備える開口部４を有する。開口部４の車内面Ｓａ上には、開口部４の外周の少なくとも一部に沿うように、かつ、信号透過領域３の少なくとも一部を取り囲むように低放射層６が設けられている。なお、図１は、フロントガラス１の車内側から見た平面図である。 The windshield 1 shown in FIG. 1 and FIG. 2 is provided on the plate-like glass member 2 and the inner surface Sa of the plate-like glass member 2 along the outer periphery of the plate-like glass member 2 and visible light And a shielding layer 5 for shielding the The shielding layer 5 has a projection 7 formed to project in the in-plane direction (downward) from the center of the upper side of the plate-like glass member 2. The projecting portion 7 has an opening 4 provided in the central portion with a signal transmission area 3 through which the signal is transmitted in accordance with transmission and reception of the signal of the on-vehicle system. A low radiation layer 6 is provided on the inner surface Sa of the opening 4 along at least a part of the outer periphery of the opening 4 and surrounding at least a part of the signal transmission region 3. FIG. 1 is a plan view of the windshield 1 as viewed from the inside of the vehicle.
　図１に車載システムの取り付け部Ａを点線で示す。取り付け部Ａは遮蔽層５の開口部４の周辺に位置する。図２にフロントガラス１に車載システムが取り付けられた場合の車載システム４０の概略の構成を点線で示す。車載システム４０は、情報送受信装置４１、情報処理装置４２、およびこれらを収容する筐体４３を有する。車載システム４０は、例えば、筐体４３が取り付け部Ａに接着層４４を介して取り付けられていてもよい。筐体４３は不図示のブラケットに取り付けられていてもよく、その場合、ブラケットが接着層４４を介して取り付け部Ａに取り付けられていてもよい。 The attachment part A of the in-vehicle system is shown by a dotted line in FIG. The attachment portion A is located around the opening 4 of the shielding layer 5. The outline configuration of the in-vehicle system 40 when the in-vehicle system is attached to the windshield 1 is shown by dotted lines in FIG. The in-vehicle system 40 includes an information transmission / reception device 41, an information processing device 42, and a housing 43 that accommodates these. In the in-vehicle system 40, for example, the housing 43 may be attached to the attachment portion A via the adhesive layer 44. The housing 43 may be attached to a bracket (not shown), in which case the bracket may be attached to the attachment portion A via the adhesive layer 44.
　遮蔽層５は、板状ガラス部材２の車内面Ｓａの少なくとも車載システムの取り付け部Ａを含む領域に設けられる。フロントガラスにおいて、車載システムの取り付け部Ａは、通常、フロントガラスの上部に位置する。遮蔽層５は取り付け部Ａを含み、かつ運転者の視界を妨げない領域に設けられる。 The shielding layer 5 is provided in a region including at least the mounting portion A of the in-vehicle system of the vehicle inner surface Sa of the plate-like glass member 2. In the windshield, the mount A of the in-vehicle system is usually located at the top of the windshield. The shielding layer 5 includes the mounting portion A and is provided in an area that does not obstruct the driver's view.
　フロントガラス１において、遮蔽層５は、板状ガラス部材２の車内面Ｓａ上の周縁部に設けられている。そして、開口部４を有し取り付け部Ａを含む遮蔽層５が、突出部７として、周縁部の遮蔽層５と連続的に設けられている。なお、周縁部の遮蔽層５と開口部４を有し取り付け部Ａを含む遮蔽層５は離間して設けられていても構わない。また、遮蔽層５は、例えば、フロントガラス１の車体取り付け部分を隠蔽する目的でその周縁部の全部に帯状に設けられることがあるが、必ずしも周縁部の４辺全部である必要はなく、周縁部の一部に遮蔽層５が形成されることもある。 In the windshield 1, the shielding layer 5 is provided on the periphery of the sheet glass member 2 on the inner surface Sa of the vehicle. And the shielding layer 5 which has the opening part 4 and which includes the attaching part A is continuously provided with the shielding layer 5 of a peripheral part as the protrusion part 7. FIG. The shielding layer 5 having the peripheral portion 5 and the opening 4 and including the attachment portion A may be separated from each other. In addition, the shielding layer 5 may be provided in the form of a band, for example, in the entire peripheral portion for the purpose of concealing the vehicle mounting portion of the windshield 1, but the shielding layer 5 does not necessarily have to be all four sides of the peripheral portion. The shielding layer 5 may be formed on part of the portion.
　遮蔽層５は、黒色セラミックス層等の従来公知の材料からなってよい。遮蔽層５の厚みは、視認性に問題のない範囲であれば特に制限されない。遮蔽層５の厚みは、８～２０μｍ程度が好ましく、１０～１５μｍがより好ましい。 The shielding layer 5 may be made of a conventionally known material such as a black ceramic layer. The thickness of the shielding layer 5 is not particularly limited as long as there is no problem in the visibility. The thickness of the shielding layer 5 is preferably about 8 to 20 μm, and more preferably 10 to 15 μm.
　フロントガラス１が有する板状ガラス部材２は合わせガラスである。板状ガラス部材２である合わせガラスは、車内ガラス板２Ａと、車外ガラス板２Ｂが、中間接着層２Ｃを介して接着された構成である。以下、板状ガラス部材２である合わせガラスに２の符号を付して説明する。車内ガラス板２Ａおよび車外ガラス板２Ｂは、それぞれ、ガラス板２Ａおよびガラス板２Ｂともいう。 The plate-like glass member 2 which the windshield 1 has is a laminated glass. The laminated glass which is the plate-like glass member 2 is configured such that the in-vehicle glass plate 2A and the out-of-vehicle glass plate 2B are bonded via the intermediate adhesive layer 2C. Hereinafter, the code | symbol of 2 is attached | subjected and demonstrated to the laminated glass which is the plate-like glass member 2. FIG. The interior glass plate 2A and the exterior glass plate 2B are also referred to as a glass plate 2A and a glass plate 2B, respectively.
　板状ガラス部材２が合わせガラスの場合、遮蔽層５は車内ガラス板２Ａの中間接着層２Ｃとは反対側の主面、すなわち合わせガラス２の車内面Ｓａ上に設けられる。ただし、遮蔽層５は、必要に応じて、車外ガラス板２Ｂの中間接着層２Ｃ側の主面に設けられてもよい。遮蔽層５は、車内ガラス板２Ａの中間接着層２Ｃとは反対側の主面と、車外ガラス板２Ｂの中間接着層２Ｃ側の主面の両方に設けられていてもよい。 When the sheet glass member 2 is a laminated glass, the shielding layer 5 is provided on the main surface of the in-vehicle glass plate 2A opposite to the intermediate adhesive layer 2C, that is, on the inner surface Sa of the laminated glass 2. However, the shielding layer 5 may be provided on the main surface of the outer glass plate 2B on the side of the intermediate adhesive layer 2C, as necessary. The shielding layer 5 may be provided on both the main surface of the in-vehicle glass plate 2A opposite to the intermediate adhesive layer 2C and the main surface on the intermediate adhesive layer 2C side of the external glass plate 2B.
　合わせガラス２における２枚のガラス板２Ａ、２Ｂとしては、自動車の窓ガラスに用いられる従来公知のガラス板が使用可能である。ガラス板２Ａ、２Ｂは、例えば、公知のフロート法で製造されたガラス板が好ましい。フロート法では、溶かしたガラス素地を錫等の溶融金属の上に浮かべ、厳密な温度操作で厚み、板幅の均一なガラス板を成型する。 As the two glass plates 2A and 2B in the laminated glass 2, conventionally known glass plates used for window glass of automobiles can be used. The glass plates 2A and 2B are preferably, for example, glass plates manufactured by a known float method. In the float method, a molten glass substrate is floated on a molten metal such as tin, and a glass plate of uniform thickness and width is formed by precise temperature control.
　ガラス板２Ａ、２Ｂの板厚は特に限定されないが、０．５ｍｍ以上３．０ｍｍ以下であることが好ましい。ガラス板２Ａ、２Ｂの板厚は同じであってもよいし、異なっていてもよい。ガラス板２Ａ、２Ｂの板厚が異なる場合、車内ガラス板２Ａの板厚は、０．３ｍｍ以上２．３ｍｍ以下であることが好ましい。車内ガラス板２Ａの板厚が０．３ｍｍ以上であることによりハンドリング性がよく、２．３ｍｍ以下であることによりフロントガラス１の質量が大きくなり過ぎない。 The thickness of the glass plates 2A and 2B is not particularly limited, but is preferably 0.5 mm or more and 3.0 mm or less. The thickness of the glass plates 2A and 2B may be the same or different. When the thickness of the glass plates 2A and 2B is different, the thickness of the in-vehicle glass plate 2A is preferably 0.3 mm or more and 2.3 mm or less. When the thickness of the in-vehicle glass plate 2A is 0.3 mm or more, the handling property is good, and when it is 2.3 mm or less, the mass of the windshield 1 does not become too large.
　また、車内ガラス板２Ａの板厚を０．３ｍｍ以上２．３ｍｍ以下とすることで、ガラス品質（例えば、残留応力）を維持できる。車内ガラス板２Ａの板厚を０．３ｍｍ以上２．３ｍｍ以下とすることは、曲がりの深いガラス板におけるガラス品質（例えば、残留応力）の維持に特に有効である。車内ガラス板２Ａの板厚は、０．５ｍｍ以上２．１ｍｍ以下がより好ましく、０．７ｍｍ以上１．９ｍｍ以下がさらに好ましい。 Moreover, glass quality (for example, residual stress) can be maintained by making board thickness of glass plate 2A in a car into 0.3 mm or more and 2.3 mm or less. Setting the thickness of the in-vehicle glass plate 2A to 0.3 mm or more and 2.3 mm or less is particularly effective for maintaining the glass quality (e.g., residual stress) in a deeply curved glass plate. 0.5 mm or more and 2.1 mm or less are more preferable, and, as for the plate | board thickness of 2 A of vehicle interior glass plates, 0.7 mm or more and 1.9 mm or less are still more preferable.
　車外ガラス板２Ｂの板厚は、１．８ｍｍ以上３ｍｍ以下であることが好ましい。車外ガラス板２Ｂの板厚が１．８ｍｍ以上であると、耐飛び石性能等の強度が十分であり、３ｍｍ以下であると、フロントガラス１の質量が大きくなり過ぎず、車両の燃費の点で好ましい。車外ガラス板２Ｂの板厚は、１．８ｍｍ以上２．８ｍｍ以下がより好ましく、１．８ｍｍ以上２．６ｍｍ以下がさらに好ましい。ただし、ガラス板２Ａ、２Ｂの板厚は常に一定ではなく、必要に応じて場所毎に変わってもよい。例えば、ガラス板２Ａ、２Ｂの一方または両方が、フロントガラス１を車両に取り付けたときの垂直方向の上端側の厚さが下端側よりも厚い断面視楔状の領域を備えていてもよい。 It is preferable that the plate | board thickness of the glass plate 2B outside a vehicle is 1.8 mm or more and 3 mm or less. When the thickness of the outside glass plate 2B is 1.8 mm or more, the strength such as anti-flying performance is sufficient, and when it is 3 mm or less, the mass of the windshield 1 does not become too large, and the vehicle fuel efficiency is improved. preferable. As for the plate thickness of the glass plate 2B outside a vehicle, 1.8 mm or more and 2.8 mm or less are more preferable, and 1.8 mm or more and 2.6 mm or less are more preferable. However, the thickness of the glass plates 2A and 2B is not always constant, and may be changed depending on the place as needed. For example, one or both of the glass plates 2A and 2B may be provided with a region in the form of a ridge in cross section in which the thickness on the upper end side in the vertical direction when the windshield 1 is attached to the vehicle is thicker than the lower end side.
　ガラス板２Ａ、２Ｂを構成するガラスの組成の一例としては、酸化物基準のモル％で表示した組成で、ＳｉＯ２を５０～８０％、Ｂ２Ｏ３を０～１０％、Ａｌ２Ｏ３を０．１～２５％、Ｌｉ２Ｏ＋Ｎａ２Ｏ＋Ｋ２Ｏを３～３０％、ＭｇＯを０～２５％、ＣａＯを０～２５％、ＳｒＯを０～５％、ＢａＯを０～５％、ＺｒＯ２を０～５％およびＳｎＯ２を０～５％含むガラスが挙げられるが、特に限定されない。 Glass plate 2A, as an example of the composition of glass constituting the 2B is a composition that is displayed in mole percent on the oxide basis, of SiO 2 50 ~ 80%, the B 2 O 3 0 ~ 10% , Al 2 O 3 0.1 to 25%, Li 2 O + Na 2 O + K 2 O 3 to 30%, MgO 0 to 25%, CaO 0 to 25%, SrO 0 to 5%, BaO 0 to 5%, ZrO Examples of the glass include 0 to 5% of 2 and 0 to 5% of SnO 2 , but are not particularly limited.
　中間接着層２Ｃの組成は、従来の合わせガラスに一般に用いられるものでよく、例えばポリビニルブチラール（ＰＶＢ）やエチレンビニルアセタール（ＥＶＡ）等を用いることができる。また、加熱前は液状である熱硬化性樹脂を中間接着層２Ｃの構成材料として用いてもよい。 The composition of the intermediate adhesive layer 2C may be one generally used for conventional laminated glass, and for example, polyvinyl butyral (PVB), ethylene vinyl acetal (EVA) or the like can be used. A thermosetting resin that is liquid before heating may be used as a constituent material of the intermediate adhesive layer 2C.
　図２に示される情報送受信装置４１は、例えば、カメラまたはセンサである。遮蔽層５において、突出部７における開口部４は、情報送受信装置４１が電波（３００ＭＨｚ－１０ＧＨｚ）および／または光（３８０ｎｍ－１１００ｎｍ）の信号の送受信を行う際に信号が透過する信号透過領域３を確保するために設けられる。電波には、ミリ波（３０－３００ＧＨｚ）が含まれる。信号透過領域３は、情報送受信装置４１がミリ波の信号を送受信する用途にも適用可能である。 The information transmitting and receiving device 41 illustrated in FIG. 2 is, for example, a camera or a sensor. In the shielding layer 5, the opening 4 in the protrusion 7 is a signal transmission area 3 through which a signal is transmitted when the information transmitting / receiving device 41 transmits / receives a signal of radio waves (300 MHz-10 GHz) and / or light (380 nm-1100 nm). Provided to secure the Radio waves include millimeter waves (30 to 300 GHz). The signal transmission area 3 is also applicable to applications in which the information transmitting and receiving device 41 transmits and receives millimeter wave signals.
　信号透過領域３の形状、面積は、情報送受信装置４１による。信号透過領域３は、具体的には、板状ガラス部材２上に遮蔽層５を有しない構成であり、電波、光等の透過特性は、板状ガラス部材２の電波、光等の透過特性と同様である。 The shape and area of the signal transmission area 3 are determined by the information transmission / reception device 41. Specifically, the signal transmission region 3 has a configuration in which the shielding layer 5 is not provided on the plate-like glass member 2, and the transmission characteristics of radio waves, light and the like are the transmission characteristics of the plate-like glass member 2 such as radio waves and light Is the same as
　フロントガラス１おいて、板状ガラス部材２の日射透過率（Ｔｅ）は６０％以下であり、かつ、可視光透過率（Ｔｖ）は７０％以上であることが好ましい。日射透過率（Ｔｅ）は５５％以下がより好ましく、４８％以下が特に好ましい。また、日射反射率（Ｒｅ）は、５％以上がより好ましく、７％以上が特に好ましい。さらに、熱吸収の量を表すＡｅ（Ａｅ＝１００－Ｔｅ－Ｒｅ）は、２０％以上が好ましく、４０％以上がより好ましく、４５％以上が特に好ましい。 In the windshield 1, it is preferable that the solar light transmittance (Te) of the plate-like glass member 2 is 60% or less and the visible light transmittance (Tv) is 70% or more. The solar radiation transmittance (Te) is more preferably 55% or less, and particularly preferably 48% or less. Further, the solar reflectance (Re) is more preferably 5% or more, and particularly preferably 7% or more. Further, Ae (Ae = 100-Te-Re) representing the amount of heat absorption is preferably 20% or more, more preferably 40% or more, and particularly preferably 45% or more.
　可視光透過率（Ｔｖ）は７２％以上がより好ましく、７３％以上が特に好ましい。また、信号透過領域３のヘイズ値は１．０％以下であることが好ましく、０．８％以下がより好ましく、０．６％以下が特に好ましい。 The visible light transmittance (Tv) is more preferably 72% or more, and particularly preferably 73% or more. The haze value of the signal transmission region 3 is preferably 1.0% or less, more preferably 0.8% or less, and particularly preferably 0.6% or less.
　なお、日射透過率（Ｔｅ）、日射反射率（Ｒｅ）および可視光透過率（Ｔｖ）は、分光光度計等により、少なくとも３００～２１００ｎｍが含まれる波長域の透過率、反射率を測定し、それぞれＪＩＳ　Ｒ３１０６（１９９８年）およびＪＩＳ　Ｒ３２１２（１９９８年）で規定される計算式から算出される値である。本明細書において、特に断りのない限り、日射透過率、日射反射率および可視光透過率は、上記の方法で測定、算出される日射透過率（Ｔｅ）、日射反射率（Ｒｅ）および可視光透過率（Ｔｖ）をいう。 In addition, the solar radiation transmittance (Te), the solar radiation reflectance (Re), and the visible light transmittance (Tv) are measured with a spectrophotometer or the like for the transmittance and reflectance in a wavelength range including at least 300 to 2100 nm, These are values calculated from the formulas defined in JIS R3106 (1998) and JIS R3212 (1998), respectively. In the present specification, unless otherwise specified, the solar radiation transmittance, the solar radiation reflectance and the visible light transmittance are the solar radiation transmittance (Te), the solar radiation reflectance (Re) and the visible light measured and calculated by the above-mentioned method. Permeability (Tv).
　信号透過領域３において、可視光透過率（Ｔｖ）、日射透過率（Ｔｅ）、日射反射率（Ｒｅ）やヘイズ値は、特に制限されず、上記のとおり板状ガラス部材２と同様とできる。ここで、信号透過領域３においては、赤外線透過率、具体的には、分光光度計等により測定される６００～１１００ｎｍにおける平均透過率が３０％以上であることが好ましく、４０％以上がより好ましい。 In the signal transmission region 3, visible light transmittance (Tv), solar radiation transmittance (Te), solar radiation reflectance (Re), and haze value are not particularly limited, and can be the same as the plate-like glass member 2 as described above. Here, in the signal transmission region 3, the infrared transmittance, specifically, the average transmittance at 600 to 1100 nm measured by a spectrophotometer or the like is preferably 30% or more, and more preferably 40% or more. .
　上記赤外線透過率は信号透過領域３に求められる特性である。したがって、このような信号透過領域３に求められる特性に応じて、板状ガラス部材２の信号透過領域３のみを信号透過領域３以外の領域と異なる特性に変更してもよい。例えば、板状ガラス部材が合わせガラス２である場合、適宜、中間接着層２Ｃの構成材料を上記の材料から変更することができる。また、信号透過領域３に対応する箇所の中間接着層２Ｃをくり抜き、信号透過領域３以外の領域と別の中間接着層にしても構わない。また、板状ガラス部材２の信号透過領域３には撥水機能、親水機能、防曇機能、遮熱機能、電熱機能等を付与するコーティングが施されていてもよい。 The infrared transmittance is a characteristic required for the signal transmission area 3. Therefore, only the signal transmission region 3 of the plate-like glass member 2 may be changed to a characteristic different from the region other than the signal transmission region 3 in accordance with the characteristics required for the signal transmission region 3. For example, when the plate-like glass member is the laminated glass 2, the constituent material of the intermediate adhesive layer 2C can be changed from the above-described materials as appropriate. In addition, the intermediate adhesive layer 2C at a portion corresponding to the signal transmission region 3 may be hollowed out to be an intermediate adhesive layer different from the region other than the signal transmission region 3. In addition, the signal transmission area 3 of the plate-like glass member 2 may be coated with a water repellent function, a hydrophilic function, an antifogging function, a heat shielding function, an electrothermal function, and the like.
　開口部４は信号透過領域３の全域を開口部４の領域内に含むように設けられる。図１、図２に示されるフロントガラス１おいて、開口部４は信号透過領域３より面積の大きい領域である。開口部４の大きさは、開口部４の外周と信号透過領域３の外周の間に以下の低放射層６が配設できる大きさとする。開口部４の形状は特に限定されない。開口部４の形状は、例えば、信号透過領域３の形状の相似形状であってもよく、相似形状とは異なる形状であってもよい。 The opening 4 is provided so as to include the entire area of the signal transmission area 3 in the area of the opening 4. In the windshield 1 shown in FIGS. 1 and 2, the opening 4 is an area larger than the signal transmission area 3. The size of the opening 4 is such that the low radiation layer 6 described below can be disposed between the outer circumference of the opening 4 and the outer circumference of the signal transmission region 3. The shape of the opening 4 is not particularly limited. The shape of the opening 4 may be, for example, a similar shape to the shape of the signal transmission region 3 or a shape different from the similar shape.
　なお、フロントガラス１おいて、開口部４の下部には遮蔽層５がなくてもよい。図３に、開口部４の下部に遮蔽層５がない、フロントガラス１の変形例における、上辺中央付近の拡大平面図を示す。図３に示すように、開口部４において、下部の遮蔽層５がない場合、開口部４の両側部の最下端を結ぶ仮想線と、遮蔽層５とで囲まれる領域が開口部４の領域である。すなわち、開口部４において、下部の遮蔽層５がない場合であっても、開口部４の両側部の最下端を結ぶ仮想線と、遮蔽層５とで囲まれる領域は、信号透過領域３の全域をその領域内に含む。開口部４が形成されている突出部７は、開口部４を有してればよく、その面積、形状は特に限定されない。 In the front glass 1, the shielding layer 5 may not be present in the lower part of the opening 4. FIG. 3 shows an enlarged plan view of the vicinity of the center on the upper side in a modification of the windshield 1 in which the shielding layer 5 is not present below the opening 4. As shown in FIG. 3, in the opening 4, when there is no lower shielding layer 5, the region surrounded by the phantom line connecting the lowermost ends of both sides of the opening 4 and the shielding layer 5 is the region of the opening 4 It is. That is, even if there is no lower shielding layer 5 in the opening 4, the region surrounded by the phantom line connecting the lowermost ends of both sides of the opening 4 and the shielding layer 5 The whole area is included in the area. The protrusion part 7 in which the opening part 4 is formed should just have the opening part 4, and the area and the shape in particular are not limited.
　低放射層６は開口部４の外周の少なくとも一部に沿うように設けられ、かつ、信号透過領域３の少なくとも一部を取り囲むように設けられる。低放射層６は、車載システム４０への熱の伝搬を抑制する効果を有する。 The low radiation layer 6 is provided along at least a part of the periphery of the opening 4 and provided so as to surround at least a part of the signal transmission area 3. The low radiation layer 6 has the effect of suppressing the propagation of heat to the in-vehicle system 40.
　上記のとおり車載システム４０は、例えば、筐体４３が取り付け部Ａに接着されることで遮蔽層５上に固定される。これは、車載システム４０を固定する場所を隠ぺいすることによって意匠性を向上させること、固定する場所に用いられる接着層４４の劣化を防ぐこと、さらに板状ガラス部材２の面上よりも遮蔽層５の面上の方が安定して固定できることによる。 As described above, the in-vehicle system 40 is fixed on the shielding layer 5 by, for example, the housing 43 being bonded to the mounting portion A. This is to improve the design by concealing the place where the in-vehicle system 40 is fixed, to prevent the deterioration of the adhesive layer 44 used in the place to be fixed, and further to shield more than the surface of the plate-like glass member 2. It is because it can be fixed more stably on the surface of 5.
　一方で、上記のように車載システム４０を遮蔽層５上に固定すると、車載システム４０と遮蔽層５との距離が近くなり、遮蔽層５が吸収した熱エネルギーが開口部４を介して車載システム４０に伝搬しやすくなる。また、情報送受信装置４１がカメラの場合、カメラを板状ガラス部材２に近づければ近づけるほど同じ大きさの開口部４に対してカメラの視野角が大きくなる。カメラを板状ガラス部材２に近づける場合、カメラと板状ガラス部材２との間の空間を密閉構造にする手段が現実的であるが、そうするとその空間から熱が逃げずに、車載システム４０に負荷を与える要因となる。したがって、開口部４には車載システム４０へのこのような熱の伝搬を抑制する方策が必要になる。 On the other hand, when the in-vehicle system 40 is fixed on the shielding layer 5 as described above, the distance between the in-vehicle system 40 and the shielding layer 5 becomes short, and the thermal energy absorbed by the shielding layer 5 passes through the opening 4. It becomes easy to propagate to 40. When the information transmitting / receiving device 41 is a camera, the closer the camera is to the plate-like glass member 2, the larger the viewing angle of the camera with respect to the opening 4 of the same size. When bringing the camera close to the plate-like glass member 2, a means for making the space between the camera and the plate-like glass member 2 a sealed structure is realistic, but then the heat does not escape from the space. It becomes a factor which gives a load. Therefore, the opening 4 needs measures to suppress such heat propagation to the in-vehicle system 40.
　低放射層６を信号透過領域３の少なくとも一部を取り囲むように設けることにより遮蔽層５が吸収した熱エネルギーが開口部４を介して情報送受信装置４１や情報処理装置４２に伝搬するのを抑制できる。熱伝搬抑制効果を高めるために、低放射層６は信号透過領域３の全周の１０～１００％に対応する領域に、信号透過領域３を取り囲むように設けられていることが好ましく、信号透過領域３の全周を取り囲むように設けられていることがより好ましい。 By providing the low radiation layer 6 so as to surround at least a part of the signal transmission region 3, the heat energy absorbed by the shielding layer 5 is prevented from propagating to the information transmission / reception device 41 or the information processing device 42 through the opening 4. it can. In order to enhance the heat propagation suppressing effect, the low radiation layer 6 is preferably provided in a region corresponding to 10 to 100% of the entire circumference of the signal transmission region 3 so as to surround the signal transmission region 3. More preferably, they are provided so as to surround the entire circumference of the region 3.
　低放射層６は、信号透過領域３を取り囲むように、かつ、遮蔽層５の開口部４の外周の少なくとも一部に沿って設けられる。低放射層６による上記熱伝搬抑制効果は、低放射層６の厚みが同じ場合その面積が大きいほど大きい。したがって、最大限の効果を発揮するためには、信号透過領域３の外周と開口部４の外周の間の領域全体に低放射層６を設けることが好ましい。一方、信号透過領域３を確実に確保するためには、信号透過領域３の外周から所定の距離をおいて低放射層６が設けられることが好ましい。 The low radiation layer 6 is provided to surround the signal transmission region 3 and along at least a part of the periphery of the opening 4 of the shielding layer 5. The heat propagation suppressing effect by the low radiation layer 6 is larger as the area of the low radiation layer 6 is the same when the thickness of the low radiation layer 6 is the same. Therefore, in order to exert the maximum effect, it is preferable to provide the low radiation layer 6 in the entire region between the outer periphery of the signal transmission region 3 and the outer periphery of the opening 4. On the other hand, in order to ensure the signal transmission area 3 reliably, it is preferable that the low radiation layer 6 be provided at a predetermined distance from the outer periphery of the signal transmission area 3.
　上記観点から、低放射層６は、例えば、図４に平面図示す構成の低放射層が好ましい。図４に示す低放射層６は、信号透過領域３の全周を取り囲む構成であり、低放射層６の外周が開口部４の外周に接するとともに、低放射層６の内周は信号透過領域３の外周から所定の距離をおいて設けられている。なお、図３に示すフロントガラス１のように開口部４の下部に遮蔽層５がない場合、低放射層６は、開口部４の遮蔽層５との境界の３辺に沿って設けられてもよい。この場合、低放射層６は、信号透過領域３の下部以外の外周を取り囲む構成である。 From the above point of view, the low radiation layer 6 is preferably, for example, a low radiation layer configured as shown in plan view in FIG. The low radiation layer 6 shown in FIG. 4 is configured to surround the entire periphery of the signal transmission region 3, the outer periphery of the low radiation layer 6 is in contact with the outer periphery of the opening 4, and the inner periphery of the low radiation layer 6 is a signal transmission region It is provided at a predetermined distance from the outer periphery of 3. When the shielding layer 5 does not exist under the opening 4 as in the windshield 1 shown in FIG. 3, the low radiation layer 6 is provided along three sides of the boundary of the opening 4 with the shielding layer 5. It is also good. In this case, the low radiation layer 6 is configured to surround the outer periphery other than the lower part of the signal transmission region 3.
　低放射層６の幅ｗは、３～２０ｍｍであることが好ましい。幅ｗは、より好ましくは５～１５ｍｍである。ここで、低放射層６の幅ｗとは、低放射層６の外周と内周の距離を指し、遮蔽層５の開口部４の外周から信号透過領域３の方向に向かう幅と一致する。また、低放射層６の内周と信号透過領域３の外周の距離Ｌは、該距離が最も短い箇所の距離Ｌｍｉｎとして、５ｍｍ以上であることが好ましく、該距離が最大の箇所の距離Ｌｍａｘとして、２０ｍｍ以下が好ましい。 The width w of the low radiation layer 6 is preferably 3 to 20 mm. The width w is more preferably 5 to 15 mm. Here, the width w of the low radiation layer 6 refers to the distance between the outer circumference and the inner circumference of the low radiation layer 6, and matches the width from the outer circumference of the opening 4 of the shielding layer 5 toward the signal transmission region 3. In addition, the distance L between the inner periphery of the low radiation layer 6 and the outer periphery of the signal transmission region 3 is preferably 5 mm or more as the distance L min at the shortest distance, and the distance L at the longest distance is 20 mm or less is preferable as max .
　低放射層６の厚みＴは、低放射層６の構成材料または製造方法による。低放射層６の厚みは、典型的にはスパッタリング法により製造される蒸着膜の場合、１５０～２５０ｎｍが好ましく、銀ペースト焼成膜の場合、３～２０μｍが好ましい。なお、本明細書における低放射層６の厚みとは低放射層６が設けられている領域における最大厚みのことである。 The thickness T of the low radiation layer 6 depends on the constituent material or manufacturing method of the low radiation layer 6. The thickness of the low radiation layer 6 is preferably 150 to 250 nm in the case of a vapor deposition film typically manufactured by sputtering, and is preferably 3 to 20 μm in the case of a silver paste fired film. In the present specification, the thickness of the low radiation layer 6 is the maximum thickness in the region where the low radiation layer 6 is provided.
　低放射層６の放射率は０．８以下が好ましく、より好ましくは０．５以下、さらに好ましくは０．２以下、特に好ましくは０．１以下である。なお、低放射層６の放射率は、ＪＩＳ　Ｒ３１０６に規定された方法で測定できる。 The emissivity of the low radiation layer 6 is preferably 0.8 or less, more preferably 0.5 or less, still more preferably 0.2 or less, and particularly preferably 0.1 or less. The emissivity of the low radiation layer 6 can be measured by the method defined in JIS R3106.
　低放射層６は、金属または金属酸化物からなることが好ましい。金属としては銀が好ましい。金属酸化物としては、錫ドープ酸化インジウム（ＩＴＯ）が好ましい。低放射層６は、例えば、銀ペースト焼成膜、ＩＴＯ膜等の低放射性の膜からなることが好ましい。低放射層６は、銀を主成分とする金属層（以下、銀層ともいう）が誘電体層の間に挟み込まれるように積層された銀系多層膜からなってもよい。銀系多層膜における誘電体層は、金属の酸化物、窒化物、酸窒化物等を主成分とする材料からなる層である。ＩＴＯ膜や銀系多層膜は、例えば、スパッタリング法により製造される膜である。 The low emission layer 6 is preferably made of metal or metal oxide. Silver is preferred as the metal. The metal oxide is preferably tin-doped indium oxide (ITO). The low radiation layer 6 is preferably made of, for example, a low radiation film such as a silver paste fired film or an ITO film. The low emission layer 6 may be formed of a silver-based multilayer film laminated so that a metal layer containing silver as a main component (hereinafter, also referred to as a silver layer) is sandwiched between dielectric layers. The dielectric layer in the silver-based multilayer film is a layer made of a material mainly composed of metal oxides, nitrides, oxynitrides and the like. The ITO film or the silver-based multilayer film is, for example, a film manufactured by a sputtering method.
　低放射層６は、低放射性の膜であれば適宜使用することができる。所望の領域へ選択的に成膜し易い点や、コスト的な観点から低放射層６は銀ペースト焼成膜が好ましい。 The low radiation layer 6 can be suitably used if it is a low radiation film. The low radiation layer 6 is preferably a silver paste fired film from the viewpoint of easy formation of a film selectively in a desired region and in terms of cost.
　低放射層６は、図４に示す低放射層６のように熱伝搬抑制効果を高めるために信号透過領域３の全周を取り囲むように枠状に設けられてもよい。また、図５に平面図を示すように、図４に示す低放射層６の枠形状の一か所が切断された形状として、外部電源等の通電機構と接続することで通電可能な構成としてもよい。図５に示す、低放射層６は、例えば、２つの端部を外部電源に接続することで、外気温が低く板状ガラス部材２が曇り易いおよび／または氷結し易い環境下にある場合に、通電することで加熱して信号透過領域３が曇るおよび／または氷結することを抑制することが可能である。なお、外気温が低い場合には、低放射層６を加熱しても、車載システム４０にかかる熱の負荷は殆どない。 The low radiation layer 6 may be provided in a frame shape so as to surround the entire circumference of the signal transmission region 3 in order to enhance the heat propagation suppressing effect as in the low radiation layer 6 shown in FIG. 4. Further, as shown in the plan view of FIG. 5, as a shape in which one part of the frame shape of the low radiation layer 6 shown in FIG. 4 is cut, it is possible to conduct electricity by connecting with an energizing mechanism such as an external power source. It is also good. The low radiation layer 6 shown in FIG. 5 is, for example, in an environment where the outside temperature is low and the sheet glass member 2 is easily fogged and / or easily iced by connecting the two ends to an external power supply. By heating, it is possible to suppress fogging and / or freezing of the signal transmission area 3 by energizing. When the outside air temperature is low, even if the low radiation layer 6 is heated, there is almost no heat load applied to the in-vehicle system 40.
　また、図５に示す、低放射層６は、例えば、２つの端部を外部電源に接続して通電状態に保持していれば、信号透過領域３の周辺の板状ガラス部材２が破損した場合に、低放射層６が断線することで、該破損を検知できるため好ましい。 Further, in the low radiation layer 6 shown in FIG. 5, for example, when the two end portions are connected to the external power supply and held in the energized state, the plate-like glass member 2 around the signal transmission region 3 is broken. In this case, it is preferable that the low radiation layer 6 is broken because the breakage can be detected.
　なお、低放射層６は、信号透過領域３に近い領域の膜厚が他の領域の膜厚よりも薄くなっていたり、信号透過領域３に近い領域がドットパターンで構成されるように形成されたりしても構わない。図６は信号透過領域３に近い領域がドットパターンで構成されるように形成された低放射層６の例を示す平面図である。図６に示す低放射層６は、信号透過領域３に近い領域がドットパターンで構成される以外、図４に示す低放射層６と同様にできる。低放射層６を図６のように構成することで信号透過領域３との境界部をシームレスに形成し外部から信号透過領域３を目立ち難くすることができる。ドットパターンにおけるドットの形状は、円形に限定されず、楕円、長方形、多角形、星形等とすることもできる。また、ドットの部分を透明にして、他の部分に低放射層を設けるドットパターンとすることもできる。 The low radiation layer 6 is formed such that the film thickness of the region near the signal transmission region 3 is thinner than the film thickness of the other regions, or the region near the signal transmission region 3 is formed by a dot pattern. It does not matter. FIG. 6 is a plan view showing an example of the low emission layer 6 formed so that the area near the signal transmission area 3 is formed by a dot pattern. The low radiation layer 6 shown in FIG. 6 can be made the same as the low radiation layer 6 shown in FIG. 4 except that the region near the signal transmission region 3 is formed by a dot pattern. By forming the low radiation layer 6 as shown in FIG. 6, the boundary with the signal transmission area 3 can be formed seamlessly, and the signal transmission area 3 can be made less noticeable from the outside. The shape of the dots in the dot pattern is not limited to a circle, but may be an ellipse, a rectangle, a polygon, a star, or the like. Alternatively, the dot portion may be transparent to form a dot pattern in which the low emission layer is provided in the other portion.
　図１、図２および図３に示すフロントガラス１は、低放射層６が板状ガラス部材２の車内面Ｓａに接するように形成されている例である。低放射層６は、開口部４の外周の少なくとも一部に沿うように、かつ、信号透過領域３の少なくとも一部を取り囲むように設けられる限り、板状ガラス部材２の車内面Ｓａ上に形成された遮蔽層５の車内面に接するように形成されてもよい。すなわち、本発明において、「低放射層が板状ガラス部材の車内面上に設けられる」とは、低放射層と板状ガラス部材の車内面との間に別の層が存在する場合を含む。 The windshield 1 shown in FIGS. 1, 2 and 3 is an example in which the low radiation layer 6 is formed in contact with the inner surface Sa of the plate-like glass member 2. The low radiation layer 6 is formed on the inner surface Sa of the sheet glass member 2 as long as it is provided along at least a part of the periphery of the opening 4 and surrounding at least a part of the signal transmission region 3. It may be formed to be in contact with the inner surface of the shielding layer 5 as described above. That is, in the present invention, "the low radiation layer is provided on the inner surface of the plate glass member" includes the case where another layer is present between the low radiation layer and the inner surface of the plate glass member. .
　例えば、平面形状は図４や図５と同様に枠形状または枠形状の一か所が切断された形状であるが、その内周が開口部４の外周と一致する大きさの低放射層６を、該内周が開口部４の外周と一致するように遮蔽層５の車内面上に設けてもよい。図６に示す低放射層６を同様に、その内周が開口部４の外周と一致するように、遮蔽層５の車内面上に設けてもよいが、ドットパターンの効果が発揮されないため、生産性の点から好ましくない。低放射層６を、その内周が開口部４の外周と一致するように、遮蔽層５の車内面上に設ける場合、ドットパターンは、例えば、後述の図１０に示すように外側に設けるのが好ましい。 For example, the planar shape is a frame shape or a shape in which a frame shape is cut at one place as in FIGS. 4 and 5, but the low radiation layer 6 having a size whose inner periphery matches the outer periphery of the opening 4 May be provided on the inner surface of the shielding layer 5 so that the inner circumference matches the outer circumference of the opening 4. Similarly, the low radiation layer 6 shown in FIG. 6 may be provided on the inner surface of the shielding layer 5 so that the inner circumference thereof coincides with the outer circumference of the opening 4, but the effect of the dot pattern is not exhibited. Unfavorable from the point of productivity. When the low radiation layer 6 is provided on the inner surface of the shielding layer 5 so that the inner periphery thereof coincides with the outer periphery of the opening 4, the dot pattern is provided on the outside as shown in FIG. Is preferred.
　低放射層６の断面の構成例を図７、図８、図９、図１０および図１１を参照して説明する。図７、図８、図９、図１０および図１１は、各構成例におけるフロントガラス１の上部の開口部４付近における上下方向の断面図を示す。 A configuration example of the cross section of the low radiation layer 6 will be described with reference to FIGS. 7, 8, 9, 10 and 11. 7, 8, 9, 10 and 11 show vertical cross-sectional views in the vicinity of the opening 4 in the upper part of the windshield 1 in each configuration example.
　図７に示すフロントガラス１の構成例において、低放射層６の平面形状は、例えば、図４で示されるのと同様の枠状の形状である。図７に示す低放射層６は、外側の端面が、遮蔽層５の端面と接するように、内側の端面が信号透過領域３の外周を臨むように設けられる。図７に示す低放射層６は、層内全体において略均一の厚みＴを有する構成である。図７に示す低放射層６の、厚みＴ、幅ｗ、内側の端面と信号透過領域３の外周の距離Ｌは、上記で説明したのと同様にできる。 In the configuration example of the windshield 1 shown in FIG. 7, the planar shape of the low radiation layer 6 is, for example, a frame-like shape similar to that shown in FIG. 4. The low radiation layer 6 shown in FIG. 7 is provided such that the inner end face faces the outer periphery of the signal transmission region 3 such that the outer end face is in contact with the end face of the shielding layer 5. The low radiation layer 6 shown in FIG. 7 is configured to have a substantially uniform thickness T throughout the layer. The thickness T, the width w, and the distance L between the inner end face of the low radiation layer 6 shown in FIG. 7 and the outer periphery of the signal transmission region 3 can be the same as described above.
　図８に示すフロントガラス１は、低放射層６が遮蔽層５の端部を覆うように設けられた構成例である。図８に示す低放射層６は、外側の端面が遮蔽層５の端面を超えて遮蔽層５の車内面上に位置するように、言い換えれば、外側の端部が遮蔽層５の内側の端部の上に重なるように設けられ、内側の端面は信号透過領域３の外周を臨むように設けられる。低放射層６の遮蔽層５の内側の端部に重ねて設けられる部分は、それ以外の部分の厚みＴと略同じ厚みｔ１に形成される。図８に示す低放射層６の平面形状は、例えば、枠状の形状であって、図７に示す低放射層６よりも車内側から見て幅が大きい構成である。なお、低放射層６が図８に示す断面形状である場合、車外側から見た平面の形状は、図７に示す断面形状の低放射層６と同様に見え、意匠性の点では２者は同様である。 The windshield 1 shown in FIG. 8 is a configuration example in which the low radiation layer 6 is provided to cover the end of the shielding layer 5. The low radiation layer 6 shown in FIG. 8 is positioned such that the outer end face is located on the inner surface of the shielding layer 5 beyond the end surface of the shielding layer 5, in other words, the outer end is the inner end of the shielding layer 5 The inner end face is provided to face the outer periphery of the signal transmission area 3. The portion provided on the inner end of the shielding layer 5 of the low radiation layer 6 is formed to have a thickness t1 substantially the same as the thickness T of the other portions. The planar shape of the low radiation layer 6 shown in FIG. 8 is, for example, a frame-like shape, and is wider than the low radiation layer 6 shown in FIG. When the low radiation layer 6 has the cross-sectional shape shown in FIG. 8, the shape of the plane viewed from the vehicle outer side looks the same as the low radiation layer 6 having the cross-sectional shape shown in FIG. Is the same.
　図８に示す低放射層６の、厚みＴ、内側の端面と信号透過領域３の外周の距離Ｌは、上記で説明したのと同様にできる。図８に示す低放射層６の幅ｗは、上記の幅より端部の重なり部分の幅ｗｓの分だけ大きくできる。端部の重なり部分の幅ｗｓは、例えば、２～５ｍｍ程度が好ましい。また、端部の重なり部分における低放射層６の厚みｔ１は、銀ペースト焼成膜の場合、上記厚みＴと同様３～２０μｍ程度が好ましい。 The thickness T of the low radiation layer 6 shown in FIG. 8 and the distance L between the inner end face and the outer periphery of the signal transmission region 3 can be the same as described above. The width w of the low radiation layer 6 shown in FIG. 8 can be made larger than the above width by the width ws of the overlapping portion of the end. The width ws of the overlapping portion of the end is preferably, for example, about 2 to 5 mm. In the case of a silver paste fired film, the thickness t1 of the low radiation layer 6 at the overlapping portion of the end portions is preferably about 3 to 20 μm as in the case of the thickness T.
　図８に示す、低放射層６は、遮蔽層５の端部を覆うように設けられていることによって、より効果的に遮蔽層５が吸収した熱エネルギーが開口部４を介してカメラ等を含む車載システム４０に伝搬するのを抑制できる。 The low radiation layer 6 shown in FIG. 8 is provided so as to cover the end of the shielding layer 5 so that the thermal energy absorbed by the shielding layer 5 can be more effectively transmitted through the opening 4 to the camera or the like. It is possible to suppress propagation to the on-vehicle system 40 including the above.
　なお、図５および図６に示す平面形状の低放射層６においても、上記同様に低放射層６の外側の端面を遮蔽層５の端面に接するような構成としてもよく、低放射層６の外側の端部を遮蔽層５の内側の端部の上に重ね合わせて設けた構成としてもよい。 In the low radiation layer 6 having the planar shape shown in FIGS. 5 and 6 as well, the outer end face of the low radiation layer 6 may be in contact with the end face of the shielding layer 5 as described above. The outer end may be superimposed on the inner end of the shielding layer 5.
　図９に示すフロントガラス１の構成例において、低放射層６の平面形状は、例えば、図４で示されるのと同様の枠状の形状であるが、その内周が開口部４の外周と略一致する大きさである。図９に示す低放射層６は、内側の端面の位置が遮蔽層５の内側の端面の位置と略一致し、全体が遮蔽層５と重なるように、遮蔽層５の車内面上に設けられている。すなわち、図９に示す構成においては、低放射層６は、開口部４内に設けられていない。つまり、低放射層６が図９に示す断面形状である場合、車外側から低放射層６を視認できず、意匠性の点で好ましい。 In the configuration example of the windshield 1 shown in FIG. 9, the planar shape of the low radiation layer 6 is, for example, a frame-like shape similar to that shown in FIG. The sizes are approximately the same. The low radiation layer 6 shown in FIG. 9 is provided on the inner surface of the shielding layer 5 so that the position of the inner end face substantially coincides with the position of the inner end face of the shielding layer 5 and the whole overlaps the shielding layer 5. ing. That is, in the configuration shown in FIG. 9, the low radiation layer 6 is not provided in the opening 4. That is, when the low radiation layer 6 has the cross-sectional shape shown in FIG. 9, the low radiation layer 6 can not be visually recognized from the vehicle outer side, which is preferable in terms of design.
　図９に示す構成においては、開口部４と信号透過領域３とは略同じ面積としてもよい。一方、図４に示されるのと同様に信号透過領域３を確実に確保するためには、信号透過領域３の外周から所定の距離Ｌをおいて低放射層６が設けられることが好ましい。そのため、図９に示す構成においても、低放射層６の内周と信号透過領域３の外周の距離Ｌは、該距離が最も短い箇所の距離Ｌｍｉｎとして、５ｍｍ以上であることが好ましく、該距離が最大の箇所の距離Ｌｍａｘとして、２０ｍｍ以下が好ましい。 In the configuration shown in FIG. 9, the opening 4 and the signal transmission region 3 may have substantially the same area. On the other hand, in order to ensure the signal transmission region 3 in the same manner as shown in FIG. 4, it is preferable that the low radiation layer 6 be provided at a predetermined distance L from the outer periphery of the signal transmission region 3. Therefore, also in the configuration shown in FIG. 9, the distance L between the inner periphery of the low radiation layer 6 and the outer periphery of the signal transmission region 3 is preferably 5 mm or more as the distance L min at the shortest distance. 20 mm or less is preferable as distance Lmax of the location of the largest distance.
　図９に示す構成において、低放射層６の幅ｗは、低放射層６の外周と内周の距離であり、遮蔽層５の形成領域に応じて適宜調整できる。低放射層６の幅ｗは、好ましくは３～５０ｍｍ、より好ましくは５～３０ｍｍとできる。低放射層６の幅ｗは、枠形状の全体で同じであってもよく、異なってもよい。例えば、下部における低放射層６の幅ｗを、遮蔽層５の形成領域に合わせて上部や左右の側部における低放射層６の幅ｗに比べて小さく設定してもよい。なお、車載システム４０の取り付け部Ａと低放射層６の形成領域は、接着性の観点から重ならないことが好ましい。図９に示す構成において、低放射層６の厚みＴは、上記と同様に蒸着膜の場合、１５０～２５０ｎｍが好ましく、銀ペースト焼成膜の場合、３～２０μｍが好ましい。 In the configuration shown in FIG. 9, the width w of the low radiation layer 6 is the distance between the outer circumference and the inner circumference of the low radiation layer 6, and can be appropriately adjusted according to the formation region of the shielding layer 5. The width w of the low radiation layer 6 can be preferably 3 to 50 mm, more preferably 5 to 30 mm. The width w of the low radiation layer 6 may be the same or different throughout the frame shape. For example, the width w of the low radiation layer 6 in the lower part may be set smaller than the width w of the low radiation layer 6 in the upper part and the left and right sides according to the formation region of the shielding layer 5. In addition, it is preferable that the attachment part A of the vehicle-mounted system 40 and the formation area of the low radiation layer 6 do not overlap from an adhesive viewpoint. In the configuration shown in FIG. 9, the thickness T of the low radiation layer 6 is preferably 150 to 250 nm in the case of the vapor deposition film as described above, and is preferably 3 to 20 μm in the case of the silver paste fired film.
　なお、低放射層６は遮蔽層５よりも車内側に設けられていることが必要である。例えば、遮蔽層５を２層にしてその間に低放射層６を挟む構成では低放射層６を介して車外側の遮蔽層５から車内側の遮蔽層５に熱エネルギーが伝搬してしまうためである。 The low radiation layer 6 needs to be provided on the vehicle inner side than the shielding layer 5. For example, in the configuration in which the low radiation layer 6 is interposed between the two shield layers 5, thermal energy is transmitted from the vehicle outer shield layer 5 to the vehicle inner shield layer 5 via the low radiation layer 6. is there.
　図１０に示すフロントガラス１の構成例において、低放射層６の平面形状は、例えば、枠状の形状であり、その内周が開口部４の外周と略一致する大きさである。図１０に示す低放射層６は、内側の端面の位置が遮蔽層５の内側の端面の位置と略一致し、全体が遮蔽層５と重なるように、遮蔽層５の車内面上に設けられている。図１０に示す低放射層６は、開口部４の外周からに離れた領域がドットパターンで構成される例である。ドットパターンにおけるドットの形状は、上記で説明したのと同様にできる。 In the configuration example of the windshield 1 shown in FIG. 10, the planar shape of the low radiation layer 6 is, for example, a frame shape, and the inner periphery thereof has a size that substantially matches the outer periphery of the opening 4. The low radiation layer 6 shown in FIG. 10 is provided on the inner surface of the shielding layer 5 so that the position of the inner end face substantially coincides with the position of the inner end face of the shielding layer 5 and the whole overlaps the shielding layer 5. ing. The low radiation layer 6 shown in FIG. 10 is an example in which a region separated from the outer periphery of the opening 4 is formed in a dot pattern. The shape of the dots in the dot pattern can be the same as described above.
　図１０に示す低放射層６では、ドットパターンは開口部４の外周からに離れるほどドットの幅が小さく（ｗ４＜ｗ３＜ｗ２）、ドット間の距離が大きい構成である。低放射層６のうち幅ｗ１で示される領域はドットが形成されていない領域である。すなわち、図１０に示す低放射層６では、開口部４の外周から離れるほどドットの形成領域の面積が小さく、ドットが形成されていない領域の面積が大きくなる構成である。言い換えれば、図１０に示す低放射層６は、低放射層６が遮蔽層５を覆う面積の割合が、開口部４の外周から離れるにつれて減少する構成である。該面積の割合の減少は段階的であってもよく連続的であってもよい。図１０に示す低放射層６の、幅ｗ、厚みＴ、内側の端面と信号透過領域３の外周の距離Ｌは、図９に示す低放射層６で説明したのと同様にできる。 In the low radiation layer 6 shown in FIG. 10, the dot pattern has a configuration in which the width of the dots decreases (w4 <w3 <w2) as the distance from the outer periphery of the opening 4 increases and the distance between the dots increases. The area indicated by the width w1 in the low radiation layer 6 is an area where no dot is formed. That is, in the low radiation layer 6 shown in FIG. 10, the area of the dot formation area decreases as the distance from the outer periphery of the opening 4 increases, and the area of the area in which the dots are not formed increases. In other words, the low emission layer 6 shown in FIG. 10 is configured such that the proportion of the area in which the low emission layer 6 covers the shielding layer 5 decreases as the distance from the outer periphery of the opening 4 increases. The reduction of the area percentage may be gradual or continuous. The width w and thickness T of the low radiation layer 6 shown in FIG. 10, and the distance L between the inner end face and the outer periphery of the signal transmission region 3 can be the same as those described for the low radiation layer 6 shown in FIG.
　図１１に示すフロントガラス１の構成例において、低放射層６の平面形状は、例えば、図１０に示す低放射層６と外周と内周が略一致する枠形状であり、図１０に示す低放射層６と同様に遮蔽層５の車内面上に設けられている。図１１に示す低放射層６の厚みは、開口部４に近い領域より開口部４からに離れた領域が小さくなるように構成される。具体的には、低放射層６の内側の端面の高さ（厚み）をＴとし、外側の端面の高さ（厚み）をｔ２としたときに、Ｔ＞ｔ２の関係を満たす。このように、図１１に示す低放射層６は、厚みが、開口部４の外周から離れるにつれて減少する構成である。低放射層６の厚みの減少は段階的であってもよく連続的であってもよい。 In the configuration example of the windshield 1 shown in FIG. 11, the planar shape of the low radiation layer 6 is, for example, a frame shape in which the outer periphery and the inner periphery substantially match the low radiation layer 6 shown in FIG. Similar to the radiation layer 6, it is provided on the inner surface of the shielding layer 5. The thickness of the low radiation layer 6 shown in FIG. 11 is configured such that the area away from the opening 4 is smaller than the area closer to the opening 4. Specifically, when the height (thickness) of the inner end face of the low radiation layer 6 is T and the height (thickness) of the outer end face is t2, the relationship of T> t2 is satisfied. Thus, the low radiation layer 6 shown in FIG. 11 has a configuration in which the thickness decreases with distance from the outer periphery of the opening 4. The reduction of the thickness of the low radiation layer 6 may be stepwise or continuous.
　図１１に示す低放射層６の幅ｗ、内側の端面と信号透過領域３の外周の距離Ｌは、図９に示す低放射層６で説明したのと同様にできる。なお、図１０に示すように、低放射層６が開口部４の外周からに離れた領域がドットパターンで構成され、低放射層６が遮蔽層５を覆う面積の割合が、開口部４の外周から離れるにつれて減少する構成に、低放射層６の厚みが、開口部４の外周から離れるにつれて減少する構成を組み合わせてもよい。 The width w of the low radiation layer 6 shown in FIG. 11 and the distance L between the inner end face and the outer periphery of the signal transmission region 3 can be the same as those described for the low radiation layer 6 shown in FIG. As shown in FIG. 10, the area where the low radiation layer 6 is separated from the outer periphery of the opening 4 is constituted by a dot pattern, and the area ratio of the low radiation layer 6 covering the shielding layer 5 is the area of the opening 4. The configuration in which the thickness of the low-emission layer 6 decreases with distance from the outer periphery of the opening 4 may be combined with the configuration in which the distance decreases with distance from the outer periphery.
　図１０や図１１に示すように遮蔽層５の車内面上に形成されている低放射層６の遮蔽層５を覆う面積の割合が、開口部４の外周から離れるにつれて減少するように形成する構成や、遮蔽層５の車内面上に形成されている低放射層６の厚みが、開口部の外周から離れるにつれて減少するように形成する構成とすることで、またはこれらの構成を組み合わせることで効果的に熱エネルギーの輻射を防ぐことができる。また、これらの構成を単独でまたは組み合わせてフロントガラス１に適用することで、遮蔽層５と低放射層６の熱膨張率差があったとしても、板状ガラス部材２に生じる残留応力を減らし、耐衝撃性を向上させることができる。 As shown in FIG. 10 and FIG. 11, the ratio of the area covering the shielding layer 5 of the low radiation layer 6 formed on the inner surface of the shielding layer 5 is formed so as to decrease with distance from the outer periphery of the opening 4 The configuration or the thickness of the low radiation layer 6 formed on the inner surface of the shielding layer 5 may be reduced as the distance from the outer periphery of the opening is reduced, or by combining these configurations. The radiation of heat energy can be effectively prevented. Moreover, even if there exists a thermal expansion coefficient difference of the shielding layer 5 and the low radiation layer 6, the residual stress which arises in the plate-like glass member 2 is reduced by applying to the windshield 1 these structures individually or in combination. And impact resistance can be improved.
　本発明の自動車窓ガラスへの車載システムの取り付けは、上記のとおり、例えば、図２に示すように行うことができる。すなわち、車載システム４０は遮蔽層５上に、例えば、接着剤等を介して係合等の手段により固定される。なお、車載システム４０の取り付けに際して、カメラ等の情報送受信装置４１と板状ガラス部材２の車内側主面との間の空間を密封する封止部が設けられていてもよい。封止部は、情報送受信装置４１の外径幅に合わせた形状であってもよく、車載システム４０と板状ガラス部材２との間に形成される空間全体を密封する形状であってもよい。 The attachment of the in-vehicle system to the automobile window glass of the present invention can be performed as described above, for example, as shown in FIG. That is, the in-vehicle system 40 is fixed on the shielding layer 5 by, for example, an adhesive or the like by means such as engagement. When mounting the in-vehicle system 40, a sealing portion may be provided to seal the space between the information transmitting and receiving device 41 such as a camera and the inner main surface of the flat glass member 2. The sealing portion may be shaped according to the outer diameter width of the information transmission / reception device 41, or may be shaped so as to seal the entire space formed between the in-vehicle system 40 and the sheet glass member 2 .
　上記のように封止部で密封した場合、情報送受信装置４１と板状ガラス部材２との間が密閉空間であり、該空間内は、外部との空気の流通がなく、車室内の温度や湿度の変化に影響されない環境である。したがって、カメラ等の情報送受信装置４１のレンズ表面や信号透過領域３で、結露等の曇りが生じにくくなる。その一方で、外部からの熱エネルギーが逃げることもないため、該空間への熱エネルギーの伝搬自体を抑えることが非常に重要である。本実施形態の自動車窓ガラスは、遮蔽層の開口部の周囲に低放射層が設けられていることで熱エネルギーの伝搬が効果的に抑制できる。 When sealed by the sealing portion as described above, the space between the information transmitting / receiving device 41 and the plate-like glass member 2 is a sealed space, there is no circulation of air with the outside, and the temperature of the vehicle interior The environment is not affected by changes in humidity. Therefore, fogging such as condensation does not easily occur on the lens surface of the information transmitting / receiving device 41 such as a camera or the signal transmission region 3. On the other hand, it is very important to suppress the propagation of thermal energy to the space itself, since thermal energy from the outside does not escape. The vehicle window glass of the present embodiment can effectively suppress the propagation of thermal energy by providing the low radiation layer around the opening of the shielding layer.
　また、封止部内の一例として、封止部で密封されて得られる密閉空間が減圧されていることが望ましい。減圧することにより密閉空間内に存在し得る湿気を減らすことができる。 Moreover, as an example in a sealing part, it is desirable for the sealed space obtained by sealing by a sealing part to be pressure-reduced. Depressurization can reduce the moisture that may be present in the enclosed space.
　さらに、別の一例として、封止部で密封されて得られる密閉空間内に、板状ガラス部材２に対して屈折率が±１０％以内の液体またはゲル体が充填されていてもよい。液体またはゲル体は、例えばマッチングオイルやジェルなどであり、屈性率整合剤などである。液体やゲル体を充填させることにより、密閉空間内の湿気を除去することが可能である。 Furthermore, as another example, a liquid or gel body having a refractive index of ± 10% or less with respect to the plate-like glass member 2 may be filled in a sealed space obtained by being sealed by a seal portion. The liquid or gel is, for example, a matching oil or gel, and is a refractive index matching agent. By filling a liquid or gel, it is possible to remove moisture in the enclosed space.
（自動車用窓ガラスの製造方法）
　本発明の自動車用窓ガラスは一般的に用いられる公知の技術により製造できる。本発明の自動車用窓ガラスの製造方法を図１に示すフロントガラス１を例に以下に説明する。フロントガラス１において板状ガラス部材２は合わせガラスである。 (Manufacturing method of window glass for automobiles)
The automotive glazing of the present invention can be manufactured by commonly known techniques. The method of manufacturing a window glass for an automobile according to the present invention will be described below with reference to a windshield 1 shown in FIG. 1 as an example. In the windshield 1, the plate-like glass member 2 is a laminated glass.
　合わせガラス２の製造に際して、まず、車内ガラス板２Ａおよび車外ガラス板２Ｂの間に中間接着層２Ｃを挿入して、圧着前の合わせガラスである合わせガラス前駆体を準備する。この合わせガラス前駆体をゴムバッグのような真空バッグの中に入れ、この真空バッグを排気系に接続する。真空バッグ内の圧力が約－６５～－１００ｋＰａの減圧度（絶対圧力約３６～１ｋＰａ）となるように減圧吸引（脱気）しながら温度約７０～１１０℃で予備接着（予備圧着）を行った後、この予備接着された合わせガラス前駆体をオートクレーブの中に入れ、温度約１２０～１５０℃、圧力約０．９８～１．４７ＭＰａの条件で加熱加圧して本接着（本圧着）を行うことにより、合わせガラス２を得ることができる。 In the production of the laminated glass 2, first, the intermediate adhesive layer 2C is inserted between the in-vehicle glass plate 2A and the out-of-vehicle glass plate 2B to prepare a laminated glass precursor which is laminated glass before pressure bonding. The laminated glass precursor is placed in a vacuum bag, such as a rubber bag, and the vacuum bag is connected to an exhaust system. Perform pre-adhesion (pre-compression bonding) at a temperature of about 70 to 110 ° C while performing vacuum suction (degassing) so that the pressure in the vacuum bag is reduced to about -65 to -100 kPa (absolute pressure: about 36 to 1 kPa). After that, this pre-bonded laminated glass precursor is placed in an autoclave, and heat and pressure are applied under the conditions of a temperature of about 120 to 150 ° C. and a pressure of about 0.98 to 1.47 MPa to perform main bonding (main pressure bonding) Thereby, the laminated glass 2 can be obtained.
　この合わせガラス２の車内面Ｓａ上に、例えば、黒色セラミックスからなる遮蔽層５を従来公知の方法で形成する。黒色セラミックス層５としては、具体的には、耐熱性黒色顔料の粉末を低融点ガラス粉末とともに樹脂および溶剤に加えて混練した黒色セラミックスペーストを印刷等によって合わせガラス２の車内面Ｓａの所定の領域に塗布し、加熱して焼き付けることで形成された黒色セラミックス層が挙げられる。また、黒色セラミックス層の形成に用いる黒色顔料には、複数の有色顔料の組み合わせにより黒色となる顔料の組み合わせも含まれる。遮蔽層５の厚みは、上記のとおりである。 On the inner surface Sa of the laminated glass 2, for example, the shielding layer 5 made of black ceramic is formed by a conventionally known method. Specifically, a black ceramic paste obtained by adding a powder of heat-resistant black pigment to a resin and a solvent together with a low melting point glass powder and kneading it by printing etc. And a black ceramic layer formed by heating and baking. In addition, the black pigment used to form the black ceramic layer also includes a combination of pigments that turns black by the combination of a plurality of colored pigments. The thickness of the shielding layer 5 is as described above.
　低放射層６として銀ペースト焼成膜を用いる場合、銀ペーストを印刷等によって合わせガラス２の車内面Ｓａの所定の領域に塗布し、加熱して焼き付けることで形成することができる。銀ペーストは、例えば、銀粉末と低融点ガラス粉末を樹脂および溶剤に加えて混練して調製できる。銀ペーストにおいては、得られる低放射層６において求められる放射率が得られるように、銀粉末と低融点ガラス粉末の割合が適宜調整される。 When using a silver paste fired film as the low radiation layer 6, it can be formed by applying the silver paste to a predetermined region of the inner surface Sa of the laminated glass 2 by printing or the like, and heating and baking it. The silver paste can be prepared, for example, by adding silver powder and low melting point glass powder to a resin and a solvent and kneading them. In the silver paste, the ratio of the silver powder to the low melting point glass powder is appropriately adjusted so as to obtain the emissivity required for the low radiation layer 6 to be obtained.
　遮蔽層５および低放射層６は、遮蔽層５となる黒色セラミックスペーストと低放射層６となる銀ペーストをそれぞれ印刷後、加熱焼き付けを同時に行うことも可能であり、生産性の観点からこの方法が好ましい。この場合、黒色セラミックスペーストの印刷と銀ペーストの印刷は、上記実施形態に応じて低放射層６と遮蔽層５が重なり部分を有しない場合は、いずれが先に行われてもよいが、通常は、黒色セラミックスペーストの印刷を先に行う。黒色セラミックスペーストの印刷と銀ペーストの印刷を同時に行える場合は、同時に行ってもよい。なお、必要に応じて、黒色セラミックスペーストを印刷、焼成して遮蔽層５を形成後、銀ペーストを印刷、焼成して低放射層６を形成してもよい。 The shielding layer 5 and the low radiation layer 6 can be simultaneously subjected to heating and baking after printing a black ceramic paste to be the shielding layer 5 and a silver paste to be the low radiation layer 6 respectively. Is preferred. In this case, the printing of the black ceramic paste and the printing of the silver paste may be performed first if the low radiation layer 6 and the shielding layer 5 do not have an overlapping portion according to the above-described embodiment, but usually First perform printing of the black ceramic paste. When the printing of the black ceramic paste and the printing of the silver paste can be simultaneously performed, they may be performed simultaneously. If necessary, the black ceramic paste may be printed and fired to form the shielding layer 5, and then the silver paste may be printed and fired to form the low emission layer 6.
　低放射層６として、銀系多層膜およびＩＴＯ膜を用いる場合、銀系多層膜およびＩＴＯ膜は、典型的にはスパッタリング法により成膜できる。成膜方法としては、例えば、スパッタリング法以外の物理的蒸着法（真空蒸着法、イオンプレーティング法）、化学的蒸着法（熱ＣＶＤ法、プラズマＣＶＤ法、光ＣＶＤ法）、イオンビームスパッタリング法等を適用してもよい。 When a silver-based multilayer film and an ITO film are used as the low emission layer 6, the silver-based multilayer film and the ITO film can be typically formed by sputtering. As a film forming method, for example, physical vapor deposition (vacuum vapor deposition, ion plating) other than sputtering, chemical vapor deposition (thermal CVD, plasma CVD, photo CVD), ion beam sputtering, etc. May apply.
　この場合、遮蔽層５を形成後、低放射層６を所定の領域に選択的に形成するためにマスキングを行った後に低放射層６の成膜を行う。これに比べて、銀ペースト焼成膜の場合は、粘性のある銀ペーストをマスキングなしに所定の領域に簡便に塗布することができるため好ましい。 In this case, after the shielding layer 5 is formed, masking is performed to selectively form the low emission layer 6 in a predetermined region, and then the low emission layer 6 is formed. In contrast, in the case of a silver paste fired film, a viscous silver paste can be easily applied to a predetermined region without masking, which is preferable.
　以上、図面等を用いてフロントガラスを例に本発明の実施形態に係る自動車用窓ガラスについて説明したが、本発明の自動車用窓ガラスはこれに限定されない。本発明の趣旨および範囲を逸脱することのない範囲で、設計を変更または変形することができる。 As mentioned above, although the window glass according to the embodiment of the present invention has been described by taking the windshield as an example using the drawings and the like, the window glass of the present invention is not limited thereto. The design may be changed or modified without departing from the spirit and scope of the present invention.
　本発明の自動車用窓ガラスは、情報信号の送受信を行う自動車用窓ガラスにおいて、車内側に情報処理装置を搭載する自動車用窓ガラス、特にはフロントガラスに好適に用いられる。 The window glass for vehicles of the present invention is a window glass for vehicles which transmits / receives an information signal, and is suitably used for a window glass for vehicles which carries an information processor inside a vehicle, especially a windshield.
　１　　　フロントガラス
　２　　　板状ガラス部材
　３　　　信号透過領域
　４　　　開口部
　５　　　遮蔽層
　６　　　低放射層。 1 Front glass 2 Flat glass member 3 Signal transmission area 4 Opening 5 Shielding layer 6 Low radiation layer.

Claims (13)

  1. 　車外と電波および／または光の信号の送受信を行う車載システムを車内に取り付け可能な自動車用窓ガラスであって、
    　板状ガラス部材と、
    　前記板状ガラス部材の車内面上に、前記板状ガラス部材の外周に沿って設けられた遮蔽層と、を有し、
    　前記遮蔽層は、前記板状ガラス部材の上辺中央から面内方向に突出する突出部を有し、
    　前記突出部は、前記信号の送受信にともない該信号が透過する信号透過領域を備える開口部を有し、
    　低放射層が、前記板状ガラス部材の車内面上に、前記開口部の外周の少なくとも一部に沿うように、かつ前記信号透過領域の少なくとも一部を取り囲むように設けられていることを特徴とする自動車用窓ガラス。     An automotive window glass that can be mounted in a car system for transmitting and receiving radio waves and / or light signals to the outside of the car,
    A plate-like glass member,
    A shielding layer provided along an outer periphery of the plate-like glass member on an inner surface of the plate-like glass member;
    The shielding layer has a projection which protrudes in the in-plane direction from the center of the upper side of the plate-like glass member,
    The protrusion has an opening having a signal transmission area through which the signal is transmitted as the signal is transmitted and received.
    A low radiation layer is provided on the inner surface of the sheet glass member along at least a portion of the periphery of the opening and surrounding at least a portion of the signal transmission region. Automotive window glass.
  2. 　前記低放射層は、金属または金属酸化物からなることを特徴とする請求項１に記載の自動車用窓ガラス。 The window glass for an automobile according to claim 1, wherein the low emission layer is made of metal or metal oxide.
  3. 　前記低放射層は、銀ペースト焼成膜により形成されていることを特徴とする請求項１または２に記載の自動車用窓ガラス。 The window glass for automobiles according to claim 1 or 2, wherein the low radiation layer is formed of a silver paste fired film.
  4. 　前記低放射層は、ＩＴＯ膜により形成されていることを特徴とする請求項１～３のいずれかに記載の自動車用窓ガラス。 The automobile window glass according to any one of claims 1 to 3, wherein the low radiation layer is formed of an ITO film.
  5. 　前記低放射層は、前記遮蔽層の端部を覆うように設けられていることを特徴とする請求項１～４のいずれかに記載の自動車用窓ガラス。 The window glass for an automobile according to any one of claims 1 to 4, wherein the low radiation layer is provided to cover an end of the shielding layer.
  6. 　前記低放射層は、前記信号透過領域に近い領域がドット状に設けられていることを特徴とする請求項１～５のいずれかに記載の自動車用窓ガラス。 The window glass for an automobile according to any one of claims 1 to 5, wherein the low radiation layer is provided in a dot shape in a region close to the signal transmission region.
  7. 　前記板状ガラス部材は合わせガラスであり、フロントガラスであることを特徴とする請求項１～６のいずれかに記載の自動車用窓ガラス。 The window glass for an automobile according to any one of claims 1 to 6, wherein the plate-like glass member is a laminated glass and a windshield.
  8. 　前記低放射層は、前記信号透過領域の全周を取り囲むように設けられていることを特徴とする請求項１～７のいずれかに記載の自動車用窓ガラス。 The window glass for an automobile according to any one of claims 1 to 7, wherein the low radiation layer is provided so as to surround the entire circumference of the signal transmission area.
  9. 　前記低放射層は、前記板状ガラス部材の曇りおよび／または氷結を防止するための加熱可能な通電機構に接続されていることを特徴とする請求項１～８のいずれかに記載の自動車用窓ガラス。 The automobile according to any one of claims 1 to 8, wherein the low radiation layer is connected to a heatable current-carrying mechanism for preventing fogging and / or freezing of the plate-like glass member. Window glass.
  10. 　前記低放射層は、前記板状ガラス部材が破損した際に検知可能とする通電機構に接続されていることを特徴とする請求項１～９のいずれかに記載の自動車用窓ガラス。 The window glass for an automobile according to any one of claims 1 to 9, wherein the low radiation layer is connected to a current-carrying mechanism which can detect when the plate-like glass member is broken.
  11. 　前記低放射層の放射率は０．８以下であることを特徴とする請求項１～１０のいずれかに記載の自動車用窓ガラス。 The automotive window glass according to any one of claims 1 to 10, wherein the emissivity of the low radiation layer is 0.8 or less.
  12. 　前記低放射層は、前記遮蔽層の車内面上に、前記低放射層の前記遮蔽層を覆う面積の割合が、前記開口部の外周から離れるにつれて減少するように形成されていることを特徴とする請求項１～１１のいずれかに記載の自動車用窓ガラス。 The low emission layer is formed on the inner surface of the shielding layer so that the proportion of the area covering the shielding layer of the low emission layer decreases with distance from the outer periphery of the opening. An automotive window glass according to any one of the preceding claims.
  13. 　前記低放射層は、前記遮蔽層の車内面上に、前記低放射層の厚みが、前記開口部の外周から離れるにつれて減少するように形成されていることを特徴とする請求項１～１２のいずれかに記載の自動車用窓ガラス。 The low radiation layer is formed on the inner surface of the shielding layer so that the thickness of the low radiation layer decreases with distance from the outer periphery of the opening. Automotive window glass according to any of the above.
PCT/JP2018/023873 2017-07-13 2018-06-22 Window glass for automobiles WO2019012962A1 (en)

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JP7486504B2 (en) 2019-02-13 2024-05-17 エージーシー グラス ユーロップ Automotive glass with excellent optical quality

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CN112208310A (en) * 2020-09-28 2021-01-12 福耀玻璃工业集团股份有限公司 Laminated glass provided with camera

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JP7486504B2 (en) 2019-02-13 2024-05-17 エージーシー グラス ユーロップ Automotive glass with excellent optical quality
DE102020106388A1 (en) 2020-03-10 2021-09-16 Audi Aktiengesellschaft Windshield assembly for a vehicle

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CN110869228B (en) 2023-05-23
JP7040526B2 (en) 2022-03-23

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