This invention relates to an arrangement for closing an opening of a motor vehicle with a pane and a shatterproofing element, especially a glass cover for a roof opening.
In order to provide a glass cover of a motor vehicle roof with a shatterproofing function, cementing a shatterproofing film on the underside of the glass pane of the cover is known; the film in its edge area dips for example into the peripheral foam of the pane, by means of which the inside sheet metal of the cover is connected to the pane, see for example DE 43 23 140 A1. When the pane breaks, the shards remain cemented to the shatterproofing film, which in its peripheral area is attached in the peripheral foam of the cover and in this way remains tensioned by the peripheral foam, by which penetration of shards into the vehicle interior or hurling of articles out of the vehicle interior can be prevented.
A similar pane structure is described in DE 101 55 168 A1. Furthermore, similar covers are also described in DE 101 51 156 A1 and DE 102 06 717 A1, in these publications a modification also being described in which the peripheral edge area of the shatterproofing film is turned down and screwed to the inside sheet metal of the cover.
DE 41 05 396 A1 discloses a solar cover for a vehicle roof in which solar cells embedded between two cement layers are attached to the underside of the pane, by which a solar cell film combination is formed which projects in the edge area into the peripheral foam of the cover.
The older German patent application 103 06 957.7 which was not published beforehand furthermore describes a glass cover in which on the underside of the pane a shatterproofing film is cemented which in its edge area projects into the permanently elastic cementing, by means of which a retaining element for linking the cover to the vehicle body is cemented to the pane.
The disadvantage in these known glass covers is that attachment parts such as the frame parts, inside cover sheet metal or visors must be joined to the glass pane with additional cement materials, for example peripheral polyurethane foam or a cement bead, and furthermore for joining the edge area of the shatterproofing film to the peripheral foam or cement or to the inside cover sheet metal complex measures must often be carried out, for example a perforation or a special surface configuration of the edge area of the shatterproofing film.
U.S. Pat. No. 6,675,550 B1 discloses glazing of a building, one layer of ethylene/methacrylic acid copolymers as a shatterproofing element being located between two panes of glass to join them.
U.S. Pat. No. 6,237,306 B1 discloses glazing of a building, one layer of ethylene/methacrylic acid copolymers as a shatterproofing element being cemented to the glass pane and being enclosed together with it in a window frame, on the other side of the shatterproofing element a protective layer which is not enclosed in the frame being cemented.
The object of this invention is to devise an arrangement for closing the opening of a motor vehicle, especially a cover for a roof opening, a shatterproofing element will be provided and still the production of the arrangement should be as economical as possible.
This object is achieved as claimed in the invention by an arrangement as claimed in claim 1. In this connection it is advantageous that there is one layer of cement material which on the one hand itself acts as a flat shatterproofing element, i.e. without an additional film or sheet, and which on the other is used to directly cement a structural attachment part, for example a reinforcing element, a retaining element, or a visor, directly to the pane, especially simple and economical production of the arrangement is enabled.
Preferred configurations of the invention will become apparent from the dependent claims.
The invention is detailed below using the attached drawings.
Furthermore the layer 14 as shown in
A shatterproofing function need not be performed by the cover film 16 since the cement layer 14 alone already has the required strength. The cover film 16 is necessarily relieved in the area of the reinforcing sections 18 and the retaining angles 20 so that the attachment parts 18, 20 directly adjoin the cement layer 14 and thus a nonpositive connection is established.
In the area of the reinforcing sections 18 and the retaining angles 20, on the underside of the glass pane 12 there can be frit imprinting 22.
The retaining angles 20 are used for mechanical joining of the cover 10 to the vehicle body, the retaining angles 20 conventionally being linked to a corresponding positioning mechanism for the cover 10 by means of a screw connection.
In the embodiment as shown in
The attachment part or parts can also be a visor instead of a reinforcing element for the pane 12 or a retaining element for connecting the pane 12 to the vehicle body or an element connected to the vehicle body. Preferably the attachment part or parts are the inside cover sheet metal, a reinforcing section or a section which is used as a contact surface for a seal or a cement connection to a body-mounted frame. Preferably the attachment part or parts are located in the edge area of the pane 12, the layer 14 of cement material preferably completely covering at least the central area of the pane 14.
The invention is advantageous insofar as an additional cementing or foaming process for connecting the attachment parts to the glass pane 12 can be omitted, since the attachment parts can be linked in the same process as application of the cement layer 14 acting as the shatterproofing element and of the cover layer 16, by which process time and material can be saved. In this connection, a full-coverage shatterproofing function can be implemented without interruption by attachment parts or retaining means. Furthermore, because the cement layer 14 itself is already acting as a shatterproofing element and is cemented to the corresponding retaining element or frame elements, complex shaping or working of the edge area of a shatterproofing film or sheet according to the prior art for better linkage to the peripheral foam or cementing can be omitted.
In all embodiments the material of the cement layer acting as a shatterproofing element can have a tear strength of at least 15 MJ/m3, preferably at least 25 MJ/m3, and a tensile strength of at least 10 MPa, preferably at least 20 MPa, each measured according to US test ASTM D-638. The modulus of elasticity can be at least 50 MPa, preferably at least 150 MPa, measured according to the US test ASTM D-5026.
Preferably the material of the cement layer acting as a shatterproofing element is ethylene/methacrylic acid copolymers. This material is sold under the trademark SentryGlass Plus from DuPont, Wilmington, USA. It is an ionomer material. The layer thickness is preferably between 1.5 and 2.3 mm.
Number | Date | Country | Kind |
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10 2004 015 920.3 | Mar 2004 | DE | national |
Filing Document | Filing Date | Country | Kind | 371c Date |
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PCT/EP05/03011 | 3/22/2005 | WO | 10/2/2006 |