MXPA99010780A - Bulletproof glass window for use as a windscreen in a motor vehicle - Google Patents

Abstract

The present invention relates to a bulletproof glass window, in particular for use as a windscreen of a motor vehicle, fitted into a frame (9), the bulletproof glass window comprising several laminated glass panes (1,2) in a compound, of which at least one glass pane (1) juts out above the other glass pane(s) (2) with a projecting section (12) within a marginal area of the bulletproof glass window, to form a grading or stepped portion (14) from the projecting section to the other glass pane(s) in the direction of the inner side of the bulletproof glass window;the bulletproof glass window with theprojecting section (12) of the at least one glass pane (1) is fixed to the frame (9), wherein the surface in the area of the grading or stepped portion (14) is fitted with an edging (10) made of synthetic material that holds back glass splinters.

Description

GLASS WINDOW PROOF OF BULLETS FOR USE LIKE A WINDSHIELD IN AN ENGINE VEHICLE DESCRIPTION OF THE INVENTION The present invention relates to a bulletproof glass window or laminated safety glass window, in particular for use as a glass shield in the front of a motor vehicle or the windshield of a motor vehicle or a car, which is mounted on a frame of the motor vehicle, according to the preamble of claim 1. DE 195 39 607 A1 discloses such a bulletproof glass window for a motor vehicle. The known bulletproof glass window is manufactured as a laminated glass sheet of several layers of glass or glass sheets, eight in total, with the circumferential edge of one of the glass sheets protruding beyond the other sheets of glass. glass along the edge of the bulletproof glass window, so they form a projection. Between the surfaces of the glass sheets, which are of identical area, there are connecting layers made of a polycarbonate film that bind to the glass sheets. The bulletproof glass window is mounted in a window frame of a vehicle body in the projection, ie, in the protruding section of the protruding glass sheet, the assembly is provided on the glass surfaces of the glass. the projection In the interior direction of the motor vehicle, the known bulletproof glass window has a stepped or staggered portion from the projecting section towards the faces of the forward surfaces of the following glass sheets. However, practical tests, in particular, crash tests, have shown that from the area of the protruding section, splinters of glass can be projected into the interior of the motor vehicle, which creates a potential danger for passengers in the motor vehicle. Therefore, the object of the invention is to provide a bullet-proof glass window from which the glass chips of the protruding section no longer enter the interior of the motor vehicle. This problem is solved by the bulletproof glass window of claim 1. Accordingly, the bulletproof glass window of the invention or the safety glass sheet, which is mainly constructed to be used as a windshield of a motor vehicle and which can be mounted in a frame, comprises several sheets of laminated glass, with at least one of the glass sheets projecting over the other sheets of glass with a projecting section within a marginal area of the bulletproof glass window to form a stepped or stepped portion from the projecting section towards the other glass sheets in the direction of the inner side of the bulletproof glass window, eg, towards the interior of the motor vehicle, the bulletproof glass window with the protruding section of at least one sheet of glass is mounted on the frame, and the surface in the area of the stepped or stepped orifice is provided with an edge made of a synthetic material to hold the glass chips back. , i In the case of mechanical impact even in the marginal area or in the regularized area of the bulletproof glass window, the edge, the cover, the layer or the frame made of synthetic material to retain the glass splinters towards back reliably prevents any sliver of glass from penetrating the edge. This means that, if the bulletproof glass window according to the invention is used as a windshield, the glass splinters can not penetrate through the synthetic material bordering and therefore can not enter the interior of the vehicle of the vehicle. motor. This also means that passengers in the motor vehicle are protected from glass splinters even if the glass sheet breaks or explodes in its marginal area. In consecuense, the present invention has a considerable advantage of reliability in terms of protection of passengers in the vehicle preventing damage by the glass chips that project to the interior. The edge of the bulletproof glass window, according to the invention, is preferably placed with a layer of synthetic material made of polycarbonate (PC) and / or a layer of synthetic material made of polyurethane (PU), polyvinylbutyral ( PVB), ethylene vinyl acetate (EVA) or polyethylene terephthalate (PET). The edge can be made from a series of layers, with several layers of synthetic material being laminated on part of the surface or on the entire surface of the level part and / or on the face of the projection. The laminated edge structure means that the connection between the edge and the glass is improved and that the edge is more durable. The edge is preferably constructed as two layers, the layer contacting the surface of the level part being made of polyurethane, which in turn rests on a layer of polycarbonate. The polyurethane establishes a safe compound between the glass surface of the projecting section and the polycarbonate layer or the polycarbonate film. The edge preferably extends over that part of the edge surface which is parallel to the inside of the bulletproof glass window to avoid complicated production and to avoid unnecessary production costs for the edge.

The face of the edge or the protective layer can be extended and can therefore be adhered by overcoming at least one projecting glass sheet. This is particularly an advantage in cases where the seat in the body of the vehicle is constructed so that the spaces remain in the frame where the bulletproof glass window is placed and that, otherwise, splinters could enter. inside the vehicle through the spaces. These spaces are closed or blocked by means of the protruding part of the edge, from the edge or the projection of the bulletproof glass window so that splinters do not penetrate into the interior of the motor vehicle in the case of, for example , an accident. For this, the edge may have an outstanding edge, fragment or protrusion which, in the edge area, at least partially rims the bulletproof glass window. The edge can be easily manufactured, when, during the production of, for example, a series of uniform and flat layers of polyurethane and polycarbonate as edge, extend beyond the edge of the sheet. The edge can be manufactured to be flexible and / or elastic. Additional advantageous embodiments of the present invention are mentioned in the dependent claims. The additional advantages, advantageous modalities and possibilities of application of the present invention are mentioned in the following description of the preferred embodiments in relation to the drawings, wherein: Figure 1 shows a partial view as a cross section of a first embodiment of a bulletproof glass window, according to the invention, wherein the mounting of the bulletproof glass window in the frame is indicated; and Figure 2 shows a second embodiment of the bulletproof glass window of the present invention. Figure 1 shows a first embodiment of the bulletproof glass window according to the invention which is constructed as a sheet of laminated glass and comprising several sheets of glass placed in layers 1, 2, a laminate 3 or composite layer between the two glass sheets 1, 2 and a series of layers such as an edge 10 made of a layer of polyurethane 7 and a layer of polycarbonate 8 in the marginal area of the bulletproof glass window, according to the invention . Below, the construction of the bulletproof glass window according to the invention, in the manner shown in Figure 1, is explained in detail by means of an example such as a windshield or glass shield in the front of a motor vehicle. The shown mode of the bulletproof glass window, however, can be used, for example, as a rear window of a motor vehicle, or as a sheet of safety glass on an aircraft or a boat, etc. The glass sheet 1 on the outside, in relation to the interior of the motor vehicle, is attached to the glass sheet 2 on the inside, in relation to the interior of the motor vehicle, by means of a laminate 3 made of polyurethane or a film or polyurethane sheet. In the marginal area, the outer glass sheet 1 protrudes above the inner glass sheet 2 circumferentially along the entire bulletproof glass window, thereby forming a projecting section 12 of the window. of bulletproof glass, according to the invention. With this section 12 or protruding projection, the bulletproof glass window is mounted in a frame 9 (in figure 1 is indicated by dashed lines) of the body of a vehicle, or is fixed in place with a track 11 adhesive, the frame 9 is formed by the columns A, the transverse beam of the roof and the lower transverse beam, and has a circumferential housing for accommodating the projecting section 12. On the inner surface 13 of the protruding section 12 of the outer glass sheet 1 within the circumferential level part 14 or adjacent groove, of the bulletproof glass window shown, a layer of a polyurethane layer 7 and a layer of polycarbonate 8 is formed, as an edge 10 or covering as a protection against glass splinters and the penetration of glass chips into the interior of the motor vehicle, wherein the polyurethane layer 7 makes contact with the interior glass surface 13 and the polycarbonate layer 8 rests. Layers 3 and 7 of polyurethane form a continuous layer and are manufactured in one step. The inner glass sheet 2 which is placed at the rear in relation to the outer glass sheet 1, is placed on the face with a sealing layer 6 made of polyurethane.

In the entire area of the inner surface of the glass sheet 2, a series of layers is applied with a layer 4 of polyurethane and a layer 5 of polycarbonate, wherein the layer 4 of polyurethane on the inner surface of the sheet 2 of glass, while the layer polycarbonate is formed on the polyurethane layer. In the production of the bulletproof glass window according to the invention shown in FIG. 1, first and second glass sheets 1 and 2 are washed and dried on a transport production line. Subsequently, an interposed construction (sandwich) is prepared in a dust-free and air-conditioned room. During this process, a polyurethane film having a thickness of 1 mm from a typical range of sheet thickness between approximately 0.3 mm and 5 mm - is placed manually, is automatically or fully automatic, and is aligned over the entire area interior of the surface 13 of the outer glass sheet 1, such that the applied polyurethane film covers the entire interior surface 13 of the glass sheet 1 to form the layers 3 and 7 of polyurethane. Subsequently, the inner glass sheet 2 is placed on the polyurethane layer 3 and aligned so that the marginal area of the bulletproof glass window to be worked out, a uniform circumferential edge or a portion is formed 14 stepped, or the outer glass sheet 1 protrudes into the marginal area on the inner glass sheet 2 with a section 12 projecting. On the bare or exposed surface of the polyurethane film or the polyurethane layer 7, which runs circumferentially along the edge, a polycarbonate frame that has previously been trimmed from or has been punched from polycarbonate film, now is placed in the step 14 of the polyurethane layer 7, the width of the polycarbonate frame corresponds to the width of the layer 7 of polyurethane similar to the exposed frame, and this in turn is covered by the polycarbonate frame. The thickness of the layer of the frame or the polycarbonate strip is, for example, 1 mm. The thickness of the polycarbonate layer, however, may depend on the application, and one may choose between approximately 0.5 mm and 5 mm. For the interposition construction prepared in this manner, a prelaminate is subsequently produced with partial plasticized films upon heating and pressing in what is called a pre-rolling oven. In the development of the preparation treatment, the enclosed air is removed by pressure almost completely from the interposition construction. Subsequently, the interposition structure that has been pretreated in this way is placed in an autoclave. In this autoclave, precisely defined pressure and temperature cycles are generated and the unique components of the pretreated interposer construction are joined or connected together. During the autoclave cycle, the interior of the autoclave is first heated to a temperature between 120 ° C and 150 ° C, preferably 130 ° C, under a pressure of 12 to 15 bar, preferably 14 bar. Once the set points or the desired values for pressure and temperature have been reached, they are maintained for a retention time in the autoclave. Subsequently, first the temperature in the autoclave is reduced and then the pressure. In the next step, a polyurethane film, such as the polyurethane layer 4, is placed and aligned on the now exposed surface of the inner glass sheet 2, and on this lined polyurethane film, a film of polycarbonate as the layer 5 of polycarbonate over the entire area, the series of layers constituting the polyurethane and polycarbonate film completely cover the exposed inner surface of the inner glass sheet 2. On the surface of the face of the inner glass sheet 2 that is not yet covered, a circumferential strip of polyurethane forming the sealing layer 6 is placed. The interposition construction that is prepared in this way is now heated and pressed again in a pre-rolling oven in order to remove almost completely the air inside the inner glass sheet 2 and the series of layers which constitute the polyurethane and polycarbonate that have been applied to it and to obtain a partial plasticization of the films from the series of layers. The prelaminated glass sheet obtained in this way is then treated again in an autoclave, the pressure and temperature cycle explained previously is carried out again, in order to obtain a durable and firm union of the whole of the prelaminated glass sheet. In the case of a bulletproof glass window manufactured in this manner, the circumferential polycarbonate layer 8 in the marginal area of the bulletproof glass window prevents glass chips from the edge of the glass sheet from reaching inside the motor vehicle in the event of an accident or a crash test. The methods for producing laminated glass sheets from bulletproof glass windows are basically explained, for example, in DE 197 45 160 A1 under the title "Verfahren und Vorrichtung zur Herstung von Verbundslcherheitsglas" (Method and apparatus for the manufacture of laminated glass), and in the nt application open to the public, not examined DE 197 114 59 Al under the title "Verfahren zur Herstellung einer gebogenen Verbundslcher-heitsglasscheibe" (Method for the production of a sheet of curved laminated glass) , to which reference is made. Figure 2 shows a second embodiment of the bulletproof glass window according to the invention. The bulletproof glass window shown, which can also be used as a windshield for a motor vehicle, comprises the same series of layers as the first embodiment explained previously, as shown in FIG. 1, specifically a sheet 24 of exterior glass, a continuous layer 25 of polyurethane, a sheet 28 of interior glass, a layer 27 of polyurethane and a layer 26 of polycarbonate. The edge here again comprises a layer 22 of polyurethane and a layer 21 of polycarbonate, wherein the layers 22 and 25 of polyurethane are produced as a layer. A sealing layer 29 also exists in this sample. The essential difference with respect to the first embodiment of Figure 1 is that the series of layers with the polyurethane layer 22 and the polycarbonate layer 21, ie the edge, extend beyond the face 30 of the glass sheet 24 outside to form a circumferential edge 20 along and on the edge of the bulletproof glass window. In the chaos of a collision, the resulting glass chips are reliably retained in a space 31 of the frame 32 (indicated in Figure 2 by the broken line) preventing them from entering the interior of the motor vehicle along the edge 20. The elaboration process follows the stages that have been explained here with respect to the first modality. During the individual steps, however, the edge 20 is maintained in the proposed position by suitable supports and spacers. In additional embodiments, three or more sheets of glass can be joined together in an interposition construction, instead of two sheets of glass as in the first and second embodiments. It is possible, for example, that at least two inner glass sheets are additionally placed in the rear part and / or several, for example two outer glass sheets of identical area are used to form the protruding section of the glass window bulletproof . In a further embodiment of the invention, an edge of the layer which, for example, may comprise a series of layers made of polyurethane and polycarbonate, may cover the interior surface of the protruding glass sheet (referred to with the number 13 in figure 1), Y in addition, also the face of the protruding glass sheet (referred to with the number 30 in Figure 2) completely or partially. This cover or layer made of synthetic material on the face of a projection can also be used in combination with the edges of the embodiment of the invention shown in Figure 2.

Claims (10)

1. A bulletproof glass window, in particular for use as a windshield of a motor vehicle, which is mounted on a frame, the bulletproof glass window comprises several sheets of glass laminated in a composite structure, of the which at least one sheet of glass protrudes beyond the other glass sheets with a projection section within a marginal area of the bulletproof glass window, to form a staggered step or position from the section of projection with the other sheets of glass in the direction of the inner side of the bulletproof glass window, the bulletproof glass window with the projection section of at least one sheet of glass is fixed to the frame, characterized because the surface in the stepped area or stepped portion is provided with an elaborate edge of synthetic material that keeps the glass chips in the back.

2. The bulletproof glass window, as described in claim 1, characterized in that the edge comprises at least one layer of synthetic material.

3. The bulletproof glass window, as described in claim 2, characterized in that the edge comprises an elaborated layer of polycarbonate.

4. The bulletproof glass window, as described in claim 2 or 3, characterized in that the edge comprises a layer made of polyurethane, polyvinyl butyral, ethylene vinyl acetate or polyethylene terephthalate.

5. The bulletproof glass window, as described in claims 2 to 4, characterized in that the edge is formed by a series of layers with several layers of synthetic material as laminates on the surface of the step.

6. The bulletproof glass window, as described in claim 5, characterized in that the series of layers comprises two layers of synthetic material, the outer exposed layer being made of polycarbonate.

7. The bulletproof glass window, as described in claim 5 or 6, characterized in that the layer contacting the surface of the stepped or staggered portion is made of polyurethane that supports a layer of polycarbonate.

8. The bulletproof glass window, as described in any of claims 1 to 7, characterized in that the edge extends over the partial surface area of the staggered step or portion, which extends parallel to the inner side of the Bulletproof glass window.

9. The bulletproof glass window, as described in any of claims 1 to 8, characterized in that the edge extends beyond one face of at least one projecting glass sheet.

10. The bulletproof glass window, as described in claim 9, characterized in that the edge has a protruding edge which, in the area of the staggering, rims the bulletproof glass window at least partially.