JP2020172404A - Laminated glass for vehicles - Google Patents

Abstract

To provide laminated glass for vehicles which can be destroyed easily, while being laminated glass for vehicles where the pair of glass plates are constituted of strengthened glass.SOLUTION: Laminated glass 10 for vehicles of the present invention comprises: a pair of strengthened glass plates 100 and 102; and an interlayer 104 interposed between the pair of strengthened glass plates 100 and 102, with the pair of strengthened glass plates 100 and 102 bonded together via the interlayer 104. The interlayer 104 has a region to be struck 106 which is struck by a hammer 112 and the region to be struck 106 has arranged a member to be struck 108 which breaks at least one of the strengthened glass plates 100 and 102.SELECTED DRAWING: Figure 5

Description

The present invention relates to laminated glass for vehicles.

In an emergency of a car (for example, a vehicle fire, a natural disaster, a traffic accident, a fall into a river, etc.), the occupant may need to escape from the car. At this time, if the door does not open or the power window does not operate, the occupant must break the window glass and escape from the vehicle.

It is conceivable to use a high-strength single-plate tempered glass as the window glass. In this case, when the glass surface is hit with a sharp tool (for example, a hammer) and the cracks on the glass surface reach the inside of the glass (tensile stress layer), the cracks self-propell to the entire window glass due to the tensile stress. Can be easily destroyed.

On the other hand, in order to improve the sound insulation in the vehicle interior, laminated glass is being adopted as the window glass. In the case of laminated glass, since a pair of glass plates are joined by an interlayer film (for example, PVB (polyvinyl butyral)), it has extremely high performance not only in sound insulation but also in safety.

Therefore, Patent Document 1 discloses a laminated glass having improved sound insulation and reduced difficulty in escaping. This laminated glass is a laminated glass in which a pair of glass plates are joined by an interlayer film, and when one glass plate breaks one point, a crack is self-propelled from the one point in a mesh pattern. Yes, the other glass plate is a glass plate having a lower strength than one glass plate.

According to the laminated glass disclosed in Patent Document 1, by using an untempered glass plate or a glass plate having a low degree of strengthening as the other glass plate arranged on the outside of the vehicle, it is difficult to break the glass through the interlayer film. It is mitigating.

Japanese Unexamined Patent Publication No. 11-116258

However, the laminated glass of Patent Document 1 has a problem that the strength is insufficient as a laminated glass for a vehicle because the glass plate on the outside of the vehicle is an untempered glass plate or a glass plate having a low degree of strengthening.

The above problem can be solved by using a tempered glass plate having a degree of strengthening equal to or higher than a predetermined level for the glass plate on the outside of the vehicle, for example, a tempered glass plate having a degree of strengthening equal to or higher than the glass plate on the inside of the vehicle. There was a problem that the tempered glass could not be easily broken.

That is, conventionally, although there is a laminated glass for vehicles (see Patent Document 1) in which the outdoor glass plate is made of an untempered glass plate or a glass plate having a low degree of strengthening, a pair of glass plates are made of a tempered glass plate. There was no laminated glass for vehicles that had high strength and could be easily broken.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a vehicle laminated glass that can be easily broken even if the pair of glass plates is a vehicle laminated glass composed of tempered glass plates. And.

The present invention includes a pair of tempered glass plates and an interlayer film interposed between the pair of tempered glass plates, and the pair of tempered glass plates are joined via the interlayer film in order to achieve the object of the present invention. Provided is a laminated glass for a vehicle, wherein the interlayer film has a hit region, and the hit region is provided with a hit member for crushing at least one of the tempered glass plates.

According to the present invention, even a laminated glass for a vehicle in which a pair of glass plates is made of tempered glass can be easily broken.

Front view of the laminated glass for vehicles according to the embodiment applied to the door glass of an automobile. Front view showing the state of moving the laminated glass for vehicles downward Front view of laminated glass for vehicles Enlarged cross-sectional view of the main part of the laminated glass for vehicles along the 4-4 line of FIG. Explanatory drawing showing the state where the hit area is hit by a hammer from the interior side of the vehicle Explanatory drawing that hides the hit area by the mark attached to the laminated glass for vehicles

Hereinafter, preferred embodiments of the laminated glass for vehicles according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a front view of the front seat door 12 in which the vehicle laminated glass 10 according to the embodiment of the present invention is applied to the door glass of the front seat door 12 of an automobile. Here, the door glass is an example of the window glass of the present invention.

First, the front seat door 12 will be described. The front seat door 12 has a door body 16, and is configured by attaching a door module 18 to the door body 16. The door body 16 is provided with connecting portions 14 and 14 on the front side, and can be opened and closed on the vehicle body body (not shown) via the connecting portions 14 and 14. Further, the door body 16 includes an inner panel 20 and an outer panel 22, and the inner panel 20 and the outer panel 22 are integrated by welding or the like so that a storage portion 24 is formed between the inner panel 20 and the outer panel 22.

At the upper end of the door body 16, an elevating port 26 for raising and lowering the laminated glass 10 for a vehicle constituting the door module 18 is provided, and the elevating port 26 is provided along the belt line 28. Further, in the storage portion 24 of the door body 16, a lower sash 30 for holding the front side portion of the vehicle laminated glass 10 and a lower sash 32 for holding the rear side portion of the vehicle laminated glass 10 are provided. There is.

The door module 18 has a belt line frame 34 extending in the front-rear direction inside the vehicle from the laminated glass 10 for vehicles, and the laminated glass 10 for vehicles and door mounting parts such as an elevating device 36 are attached to the belt line frame 34. It is held integrally.

Many of the parts of the door module 18 are arranged above the belt line frame 34 when the window is fully closed. The external dimensions of the door module 18 are substantially equal to the outer diameter dimensions of the laminated glass 10 for vehicles. As shown by an arrow in FIG. 1, the door module 18 is attached to the door body 16 from above via an elevating port 26.

FIG. 2 is a front view of the front seat door 12 showing a state in which the motor 38 is driven to move the vehicle laminated glass 10 downward.

Next, the laminated glass 10 for a vehicle of the embodiment will be described.

FIG. 3 is a front view of the laminated glass 10 for a vehicle. FIG. 4 is an enlarged cross-sectional view of a main part of the laminated glass 10 for a vehicle along the line 4-4 of FIG.

As shown in FIG. 4, the laminated glass 10 for a vehicle includes a pair of tempered glass plates 100 and 102 and an interlayer film 104 interposed between the pair of tempered glass plates 100 and 102, and the pair of tempered glasses. The plates 100 and 102 are joined via an interlayer film 104.

The laminated glass 10 for a vehicle of the embodiment is configured as a laminated glass to improve sound insulation, and a pair of glass plates are provided by providing the impacted region 106 and the impacted member 108 on the interlayer film 104 as described later. Even the laminated glass 10 for vehicles composed of the tempered glass plates 100 and 102 has achieved a structure that can be easily broken.

Here, inorganic glass is preferable as the tempered glass plates 100 and 102 constituting the laminated glass 10 for vehicles of the embodiment. As the inorganic glass, for example, soda lime glass, borosilicate glass, non-alkali glass, quartz glass and the like are used without particular limitation. Of these, soda lime glass is particularly preferable from the viewpoint of bend moldability, physical properties, cost and the like. The tempered glass may be either physically tempered glass represented by wind-cooled tempered glass or chemically tempered glass. In the case of physically tempered glass, the glass surface that has been uniformly heated in bending molding is rapidly cooled from a temperature near the softening point, and a compressive stress is generated on the glass surface due to the temperature difference between the glass surface and the inside of the glass. May be strengthened. In the case of chemically tempered glass, the glass surface may be strengthened by generating compressive stress on the glass surface by an ion exchange method or the like after bending molding. Further, glass that absorbs ultraviolet rays or infrared rays may be used, and more preferably, it is transparent, but a glass plate colored to such an extent that the transparency is not impaired may be used. As the bending molding of the glass plate, gravity molding, press molding, roller molding and the like are used. The method for forming the glass plate is not particularly limited, but for example, a glass plate formed by a float method or the like is preferable. The surface compressive stress of the pair of tempered glass plates 100 and 102, which is an index of the degree of strengthening, is preferably 15 MPa or more and 60 MPa, more preferably 20 MPa or more and 55 MPa or less, and 25 MPa at the center of the glass plate. It is more preferably 50 MPa or less. When the surface compressive stress is within the above range, it is easily crushed by impact, and the strength of the laminated glass is high, which is excellent in safety. Here, the surface compressive stress in the present specification is measured at the central portion of the glass plate by a method according to JIS R3222: 2003. The outer plate (for example, tempered glass plate 102) arranged on the outdoor side of the vehicle may be equal to the stress of the inner plate (for example, tempered glass plate 100) arranged on the indoor side of the vehicle, and the stress of the vehicle may be equal. The outer plate arranged on the outdoor side may be equal to or higher than the stress of the inner plate arranged on the indoor side of the vehicle.

The thickness of the tempered glass plates 100 and 102 is preferably 0.5 mm or more and 2.3 mm or less, more preferably 0.7 mm or more and 2.0 mm or less, and further preferably 0.9 mm or more and 1.8 mm or less. preferable. The thicknesses of the tempered glass plates 100 and 102 may be the same or different. When the thicknesses of the tempered glass plates 100 and 102 are different from each other, it is preferable that the thickness of the inner plate is thinner than the thickness of the outer plate from the viewpoint of vehicle safety and weight reduction. When the outer plate is 0.7 mm or more and 2.3 mm or less, the strength as a window glass and the easiness of cracking from the inside of the vehicle are particularly well-balanced and preferable.

A thermoplastic resin is often used as the interlayer film 104. Examples of the thermoplastic resin include a plasticized polyvinyl acetal resin typified by a PVB resin, a plasticized polyvinyl chloride resin, a saturated polyester resin, a plasticized saturated polyester resin, a polyurethane resin, and a plasticized polyurethane resin. , Ethylene-vinyl acetate copolymer resin, ethylene-ethyl acrylate copolymer resin, and other thermoplastic resins that have been conventionally used in this type of application. Further, a resin composition containing a modified block copolymer hydride described in JP-A-2015-821 can also be preferably used. As the interlayer film 104, a plasticized polyvinyl acetal-based resin is preferable in terms of adhesiveness, durability, and the like, and polyvinyl butyral (PVB) is particularly preferable.

The thickness of the interlayer film 104 is usually 0.2 mm or more and 2.3 mm or less, but it is preferably 0.3 mm or more and 1.5 mm or less in consideration of light weight and handleability. Further, when the escape property is taken into consideration, the thinner one is preferable, but as long as the impacted member 108 is provided inside, it is preferable to have a certain appropriate thickness. Further, when the interlayer film 104 has a multilayer structure in which two or more resin layers are laminated, it is preferable that at least one layer is a sound insulation layer having sound insulation. The sound insulation layer is not particularly limited, and examples thereof include a layer containing 40 parts by weight or more of a plasticizer with respect to 100 parts by weight of the polyvinyl acetal resin. Further, an interlayer film having excellent sound insulation may be used, in which two layers having a relatively high shore hardness sandwich a low layer.

Next, the impacted region 106 and the impacted member 108 provided on the interlayer film 104 will be described.

As shown by the alternate long and short dash line in FIGS. 3 and 4, the interlayer film 104 has an impacted region 106 that is impacted by a striking means such as a hammer 112 (see FIG. 5). The hit region 106 is provided with a hit member 108 that is hit by a hammer 112 and crushes the tempered glass plate 102.

As an example, the impacted region 106 is a disk-shaped region surrounded by a circle 110 indicated by a two-dot chain line, and the impacted member 108 is provided at the center of this region. That is, the impacted region 106 refers to an region that surrounds the impacted member 108 at the center and can effectively transmit the impact force of the hammer 112 (see FIG. 5) to the impacted member 108. For example, although it depends on the size of the impacted member 108, the diameter D of the impacted region 106 is preferably 2 cm or less, and more preferably 1 cm or less. With the impacted region 106 of this size, the above-mentioned impacting force can be effectively transmitted to the impacted member 108.

Further, the circle 110 may be lightly marked with ink or the like, or the intermediate film 104 in the impacted region 106 may be lightly colored in order to distinguish it from other transparent intermediate films 104. As a result, the interlayer film 104 is provided with the impacted region 106 that can be easily visually confirmed.

As shown in FIG. 1, such a hit region 106 is provided on the peripheral edge of the transparent region 10A of the vehicle laminated glass 10 when the vehicle laminated glass 10 completely seals the opening 54. Specifically, the impacted region 106 is provided on the upper peripheral edge portion 10B (see FIG. 3) located on the rear side of the vehicle in the peripheral edge portion. The fluoroscopic region 10A is an region surrounded by the sash 46a, the sash 46b, the sash 46c, and the belt line frame 34 in the entire region of the laminated glass 10 for the vehicle.

As shown in FIG. 4, the impacted member 108 includes a sharpened portion 108A that is sharpened from one tempered glass plate 100 of the pair of tempered glass plates 100 and 102 toward the other tempered glass plate 102. As an example, the impacted member 108 is a conical member made of metal and having a bottom surface diameter of about 3 mm, has a length L equal to or less than the thickness T of the interlayer film 104, and is intermediate in the impacted region 106. It is embedded in the membrane 104. The impacted member 108 may be directly embedded in the interlayer film 104, or may have a bottom surface fixed to one of the tempered glass plates 100 and the whole thereof may be inserted into the interlayer film 104.

Here, the length L of the impacted member 108 refers to the length of the interlayer film 104 along the thickness T direction, that is, the length of the tempered glass plates 100 and 102 along the normal direction. The length L of the impacted member 108 is preferably equal to the thickness T of the interlayer film 104, but it is practically difficult to make it equal to the thickness T of the interlayer film 104 having an error. Therefore, as an example, the interlayer film The length is preferably 60% or more and 95% or less, more preferably 70% or more and 90% or less, and 80% or more and 90% or less with respect to the standard value of the thickness T of 104. Is even more preferable. As a result, the sharpened portion 108A does not protrude from the surface of the interlayer film 104, so that the tempered glass plate 102 can be prevented from being damaged by the sharpened portion 108A. Further, as will be described later, the striking force of the hammer 112 (see FIG. 5) carried out from the tempered glass plate 100 side can be effectively transmitted to the tempered glass plate 102. Further, the area of the impacted member 108 when the laminated glass 10 for a vehicle is viewed from the front side is preferably 1 cm ² or less, more preferably 0.5 cm ² or less, and 0.3 cm ² or less. It is more preferable to have.

In the laminated glass 10 for vehicles configured as described above, one tempered glass plate 100 is arranged on the indoor side of the vehicle as an inner plate, and the other tempered glass plate 102 is arranged on the outdoor side of the vehicle as an outer plate. ..

Next, an example of the action of the laminated glass 10 for a vehicle configured as described above will be described.

FIG. 5 is an explanatory view showing a state in which the hit area 106 is hit by the hammer 112 from the interior side of the vehicle.

As shown in FIG. 5, when the impacted region 106 is hit by the hammer 112 from the interior side of the vehicle via the tempered glass plate 100, cracks on the glass surface of the tempered glass plate 100 reach the inside of the tempered glass plate 100. As a result, the cracks run on the entire tempered glass plate 100. As a result, the tempered glass plate 100 is destroyed.

Then, since the striking force of the hammer 112 is transmitted to the impacted region 106 (see FIG. 4) via the tempered glass plate 100, the interlayer film 104 in the impacted region 106 is connected to the tempered glass plate 100. It is sandwiched between the tempered glass plate 102 and compressed in the thickness direction. As a result, the sharp portion 108A of the impacted member 108 protrudes from the surface of the interlayer film 104 and collides with the surface of the tempered glass plate 102, causing cracks on the glass surface of the tempered glass plate 102. Then, when the crack reaches the inside of the tempered glass plate 102, the crack self-propells over the entire tempered glass plate 102. As a result, the tempered glass plate 100 is destroyed. Therefore, the pair of tempered glass plates 100 and 102 are simultaneously destroyed by the impact of the hammer 112.

Therefore, according to the vehicle laminated glass 10 of the embodiment, the pair of tempered glass plates 100 and 102 are joined to each other via the interlayer film 104, and the interlayer film 104 is hit by the hammer 112. Since the impacted region 106 is provided with the impacted member 108 that crushes at least one of the tempered glass plates 100 and 102, the pair of glass plates is the tempered glass plate 100. Even the vehicle laminated glass 10 made of 102 can be easily destroyed.

Further, according to the laminated glass 10 for a vehicle of the embodiment, as shown in FIG. 1, since the impacted region 106 is provided on the peripheral edge of the perspective region 10A, the following effects can be obtained.

The impacted region 106 may be provided at any position within the fluoroscopic region 10A. For example, when the impacted region 106 is provided in the central portion of the fluoroscopic region 10A that is easily bent, the impacted region 106 may be provided. When the hit area 106 is hit with the hammer 112, the see-through area 10A is easily bent, so that the hitting force of the hammer 112 may not be effectively transmitted to the hit member 108.

On the other hand, since the laminated glass 10 for a vehicle of the embodiment is provided with the impacted region 106 on the peripheral edge portion that is hard to bend, the impacting force of the hammer 112 can be effectively transmitted to the impacted member 108. Further, since the upper peripheral edge portion 10B located on the rear side of the vehicle in the peripheral edge portion of the perspective region 10A is provided with the impacted region 106, the hammer 112 can easily strike the impacted region 106 (easiness of hitting). improves.

To reiterate, according to the laminated glass 10 for vehicles of the embodiment, since the impacted region 106 and the impacted member 108 are provided on the interlayer film 104, the vehicle in which a pair of glass plates is composed of tempered glass plates 100 and 102. Even the laminated glass 10 can be easily broken. Since the impacted region 106 is provided on the peripheral edge of the perspective region 10A, the impacting force of the hammer 112 can be effectively transmitted to the impacted member 108. Further, since the upper peripheral edge portion 10B is provided with the hit area 106, the ease of hitting the hit area 106 by the hammer 112 is improved. By providing the impacted region 106 on the peripheral edge of the transparent region 10A, the impacted region 106 becomes inconspicuous from the outside, so that the design of the laminated glass 10 for vehicles is also improved.

In the above embodiment, the upper peripheral edge portion 10B is exemplified as a preferable arrangement position of the impacted region 106, but for example, as shown in FIG. 3, the lower peripheral edge portion 10C located on the rear side of the vehicle is impacted. Region 106 may be provided.

The vehicle laminated glass 10 of the embodiment may include the mark 114 illustrated in FIG. The mark 114 indicates, for example, the manufacturer of the laminated glass 10 for vehicles, but is not limited thereto. The lower peripheral edge portion 10C is generally a position provided with a mark (“AGC” in FIG. 6) 114 indicating the manufacturer name of the laminated glass 10 for vehicles. The mark 114 (mark “C” in FIG. 6) and the impacted region 106 are arranged at overlapping positions in the thickness direction of the vehicle laminated glass 10. As a result, the impacted area 106 is hidden by the mark 114, so that the design of the laminated glass 10 for vehicles is improved. Here, as an example, the mark 114 is provided on the surface of the tempered glass plate 100 or the tempered glass plate 102 in contact with the interlayer film 104.

Further, in the embodiment, a metal conical member has been exemplified as a preferred embodiment of the impacted member 108, but the present invention is not limited thereto. For example, the material of the impacted member 108 may be ceramics, glass, metal oxides, minerals, stones such as diamond, or wood. The impacted member 108 is preferably harder than the resin. Hardness in the present specification refers to Young's modulus. The Young's modulus of the impacted member 108 is, for example, preferably 10 GPa or more, more preferably 20 GPa or more, and even more preferably 30 GPa or more. The shape of the impacted member 108 is a shape having a sharp portion such as a polygonal pyramid shape, a needle shape or a nail shape, or a sharp portion such as a ball shape, a shape having a curvature at the tip portion, a rectangular parallelepiped shape or a cylindrical shape. It may be a shape that does not include.

Further, in the embodiment, an example in which the laminated glass 10 for a vehicle is applied to a door glass which is an example of a window glass has been described, but the window glass to which the laminated glass for a vehicle of the present invention can be applied is an opening provided in the vehicle. It can be applied as long as it is a window glass that seals the part. For example, it can be applied to window glass attached to an opening such as rear glass, quarter glass, roof glass and the like.

Further, in the embodiment, the impacted region 106 that can be visually confirmed has been described, but when it is not necessary to visually confirm the impacted region 106, the interlayer film 104 is provided with the impacted member 108. Just need it. That is, in this case, the hit member 108 is visually confirmed, and the peripheral portion including the hit member 108 is hit with the hammer 112.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above examples, and it goes without saying that various improvements and modifications may be made without departing from the gist of the present invention. ..

10 ... Tempered glass for vehicles, 12 ... Front seat door, 14 ... Connecting part, 16 ... Door body, 18 ... Door module, 20 ... Inner panel, 22 ... Outer panel, 24 ... Storage part, 26 ... Elevating port, 28 ... Belt line, 30 ... Lower sash, 32 ... Lower sash, 34 ... Belt line frame, 36 ... Lifting device, 38 ... Motor, 100 ... Tempered glass plate, 102 ... Tempered glass plate, 104 ... Intermediate film, 106 ... Impact area , 108 ... hit member, 110 ... circle, 112 ... hammer, 114 ... mark

Claims (15)

A laminated glass for a vehicle comprising a pair of tempered glass plates and an interlayer film interposed between the pair of tempered glass plates, and the pair of tempered glass plates joined via the interlayer film.
The interlayer film has a hit area and has a hit area.
The impacted region is provided with a impacted member that crushes at least one of the tempered glass plates.
Laminated glass for vehicles. The laminated glass for a vehicle is configured as a window glass for sealing an opening provided in the vehicle.
The laminated glass for a vehicle according to claim 1. The window glass is configured as an opening / closing glass that opens and closes the opening.
The laminated glass for a vehicle according to claim 2. The window glass is configured as a vehicle door glass.
The laminated glass for vehicles according to claim 2 or 3. When the window glass seals the opening, the impacted area is provided on the peripheral edge of the see-through area of the window glass.
The laminated glass for a vehicle according to claim 4. The impacted region is provided on the peripheral portion of the peripheral portion of the perspective region located on the rear side of the vehicle.
The laminated glass for a vehicle according to claim 5. The impacted member includes a sharp portion that is sharpened from one tempered glass plate of the pair of tempered glass plates toward the other tempered glass plate.
The laminated glass for a vehicle according to any one of claims 1 to 6. One tempered glass plate of the pair of tempered glass plates is arranged on the indoor side of the vehicle, and the other tempered glass plate is arranged on the outdoor side of the vehicle.
The laminated glass for a vehicle according to claim 7. The impacted member has a conical shape or a polygonal pyramid shape.
The laminated glass for a vehicle according to any one of claims 1 to 8. The impacted member is metal, ceramics, glass, metal oxide, mineral, stone, or wood.
The laminated glass for a vehicle according to any one of claims 1 to 9. The impacted member has a length equal to or less than the thickness of the interlayer film.
The laminated glass for a vehicle according to any one of claims 1 to 10. Both of the pair of tempered glass plates have a thickness of 0.5 mm or more and 2.3 mm or less.
The laminated glass for a vehicle according to any one of claims 1 to 11. The pair of tempered glass plates are composed of a first glass plate located on the outdoor side of the vehicle and a second glass plate located on the indoor side of the vehicle, and surface compression of the in-plane central portion of the first glass plate. The stress is greater than the surface compressive stress of the second glass plate,
The laminated glass for a vehicle according to any one of claims 2 to 6. The interlayer film is a sound insulating film having a multilayer structure.
The laminated glass for a vehicle according to any one of claims 1 to 13. The laminated glass for vehicles is provided with a mark.
The mark and the impacted area are provided at positions where they overlap in the thickness direction of the laminated glass for a vehicle.
The laminated glass for a vehicle according to any one of claims 1 to 14.

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