MXPA96004580A - Window glass for vehicle prepared parasujecion adhes - Google Patents

Abstract

The present invention relates to glass sheet for adhesive fastening to a rim of a window opening, the glass sheet has an elastomer profile frame that extends around the periphery of the glass sheet and has a profile section in channel form, to face the flange and have internal and external ribs to define a channel with an anchoring surface defined by at least one of the anchoring cuts and projections on the anchoring surface, the channel contains an adhesive composition for establishing an adhesive bond with respect to the rim of the window opening, the connection of the adhesive composition with the profile section is made only by the mechanical interlocking of the adhesive composition with the anchoring surface of the profile section in the form of a channel , the improvement where a flexible rope is placed on the bottom of the channel of the profile section, the rope is extended by the or less on a part of the profile frame and having opposite end sections, with at least one end section extending out of the channel to be clamped and pulled along the channel to release the mechanical interlocking between the composition adhesive and at least one rib of the profile section in the shape of a

Description

WINDOW GLASS FOR VEHICLE PREPARED FOR ADHESIVE CLAMPING DESCRIPTION OF THE INVENTION The invention relates to a glass sheet intended for adhesive fastening, with a profile frame that is made of an elastomer and has on the opposite side of the adhesive flange of the window opening a profile section in cross section shaped of channel, provided with skewed cuts and / or anchoring projections, to receive the adhesive composition by establishing the adhesive connection with respect to the adhesive flange of the window opening, the connection of which with the profile frame takes place without adhesive bonding by mechanically locking the hardened adhesive composition with the skewed cuts and / or anchoring projections of the profile section in the shape of a channel. A glass sheet of this type, for use in an automotive vehicle can be observed in DE 4301026 Al. Said glass sheet has the advantage that, on the one hand, its assembly in the automotive vehicle is carried out by adhesive methods, treated and usual tests, but that, on the other hand, in case of needing it, it can be freed again from window sickness relatively quickly and easily. This is because, since the adhesive composition and the profile frame do not enter an adhesive bond and the profile frame consists of an elastically compliant polymer, the glass sheet can be removed by pressing after hardening the adhesive, the bands laterals of the channel-shaped profile section, producing and separating themselves from the hardened adhesive composition. However, in the case of automotive vehicles, the resistance of the connection between the glass panes and the body window frame is. subject to certain minimum requirements. For example, the connection must be strong enough that, in rear-end collisions, the occupants of the vehicle are not thrown from the vehicle through the opening of the front window even at relatively high speeds. For this reason, the windshields must be sheets of laminated glass with high resistance to penetration, and their connection with the window frame must also not be released. This represents for automotive glass sheets of the generic type that the required resistance of the connection must be achieved by a corresponding adjustment of the hardness of the elastomer and / or by the corresponding geometric design of the profile frame, which is specific to the section cross section of the profile section with channel shape, which is possible without difficulties. On the other hand, however, as a result, the deliberate release of the glass sheet, if necessary, becomes more difficult to a greater or lesser degree. Although the removal of the sheet during the work can be done without any problem, using appropriate tools, the connection with the window frame is so solid that it is not possible for a vehicle occupant to press the window leaf from the inside in an emergency , in order to free himself from the vehicle, for example after an accident. The invention is based on the object of developing a glass sheet of the generic type so that, without significantly damaging the resistance of the connection, it can be released from its connection from the inside of the vehicle if necessary, for example in particular after an accident, with the purpose of exposing an emergency escape opening, without requiring excessive forces. According to the first embodiment, the object on which the invention is based is achieved by arranging, on the bottom of the depression in the form of a channel, at least on part of the profile frame, a flexible cord, of which less an end section is driven and can be clamped on the side facing the inner compartment, and with the help of said mechanical clamping between the hardened adhesive bed and the inner band of the channel shaped profile form, it can be released .

Although the arrangement of a release rope in or directly close to a bed of adhesive is known in principle, from EP 0121480 Al, in the case of known solutions, the release rope always serves to cut the bed of the same adhesive. Considerable forces have to be exerted for this purpose, special devices generally being required for this. the release of the sheet of glass with the help of the release rope by an occupant of the vehicle in an emergency, is not possible in the case of known connections of adhesive, since they can not perform the function of an emergency escape window . In contrast to the known forms of glazing, in the case of the glass sheet according to the invention, the flexible cord does not serve the purpose of cutting the adhesive connection, since it is merely intended to specifically assist the operation of the release of the profile frame of the hardened bed of adhesive, since the rope between the hardened bed of adhesive and the inner band of the channel-shaped profile section is continuously expelled. Since the rope is not embedded in the adhesive composition, large forces are not required to release the rope from the adjacent adhesive composition. The forces for releasing the rope from the adhesive composition can be further reduced by providing the rope with a suitable anti-adhesive agent, which prevents the rope from adhering to the adhesive composition. According to another embodiment, the object on which the invention is based, is achieved by reducing the mechanical anchoring by the biased cuts and / or anchoring projections in a locally limited section of the profile frame in such a way that the beginning of the Operation of release of the glass sheet is possible in this section without the help of tools. In the case of this embodiment, the resistance of the mechanical locking is specifically weakened by the change of the geometrical shape of the anchoring projections and / or of the biased cuts in a locally limited region, preferably in a corner region. At this site, the release of the profile frame from the cured adhesive bed can be achieved relatively easily and quickly by applying pressure to the limiting region of the glass sheet from the inside. If the release operation is initiated in this way in said site, it can be continued relatively easily also in the regions of union with increased mechanical locking, whereby the complete release of the glass sheet only by force applied by an occupant of the vehicle, it is also possible in the case of this modality.

If this embodiment according to the invention is used in the case of a windshield, the weakening of the mechanical locking is preferably performed in the lower corner of the windshield along the driver's seat. In this way, the effect is achieved because, despite the local weakening of the connection, the windshield remains in the frame in a rear end collision, since the kinetic energy of the driver is intercepted by the airbag and does not push over the windshield. According to a preferred embodiment of the invention, the profile frame does not have anchoring projections and / or slanted cuts over a length of 10 to 30 cm in each case for the corner of the sheet. Other details and advantages of the invention arise from the claims and from the following description of the various embodiments with reference to the drawings, in which: Figure 1 shows a windshield with a profile frame and a rope that lies in the frame of profile, in a total view; Figure 2 shows a section along the line II-II in Figure 1 in an enlarged representation; Figure 3 shows the windshield shown in Figure 1 in the fixed state, as a section in the limiting region in an elongated representation; Figure 4 shows the windshield shown in Figure 3, in the release phase with the help of the rope; Figure 5 shows the windshield shown in Figure 3, at the end of the release operation; Figure 6 shows a windshield with a regionally different cross section profile frame, in a total view; Figure 7A shows a section along line A-A of Figure 6, in the case of a first embodiment of the cross section of the profile; Figure 7B shows a section along line B-B of Figure 6, in the case of the first embodiment of the cross section of the profile; Figure 8A shows a section along line A-A of Figure 6, in the case of a second profile cross sectional mode; and Figure 8B shows a section along the line B-B of Figure 6, in the case of the second embodiment of the profile cross-section. In the following description, the invention is described with reference to illustrative embodiments of a windshield for automotive vehicles. It is obvious that the invention can also be used for other glass sheets of an automotive engine, provided that the fastening of the glass sheets is present in the same way in the frame of the vehicle body. The invention is also not restricted to the application in the case of automotive vehicles, but it can also be used in other vehicles, as well as to make crystals in the construction sector, if the possibility of an exhaust opening is to be provided. of emergency. As shown in Figure 1, the glass sheet 1 is provided along its entire periphery of sheet with a profile frame 2 made of an elastomer. This is preferably a profile sheet that has been extruded onto the surface of the glass sheet with the aid of a known method, for example, that presented in DE 4301026 Al, on page 6. In the case of the windshield, the glass sheet 1 by itself consists of laminated glass. However, it is obvious that it can also consist of a monolithic glass, thermally tempered glass, so-called single-layer safety glass. As can be seen in particular in Figures 2 to 5, the profile frame 2 has a profile section 3 substantially in the shape of a U and a lip 4 extending outwardly beyond the limit of the window sheet. The U-shaped profile section 3 is composed of the lower section 5, the inner side strip 6 and the outer side strip 7, which form a depression in the form of a channel. The channel type depression widens towards the bottom section 6, and the side strips 6 and 7 are respectively provided on its inner side with biased cuts, whereby anchoring projections 8 are formed. Arranged in the depression of type of channel. channel along the line formed by the lower part 5 and the inner side band 6 is a flexible cord 10, to be precise throughout the entire profile frame. The two end sections 11, 12 of the rope 10 are brought from the channel type depression of the profile section 3 towards a suitable location, preferably at the bottom of the center of the profile frame 2. Up to the assembly of the sheet glass, the ends of the rope 11, 12 are fastened on the glass sheet in a suitable manner and, after assembly of the glass sheet, they are brought to their final position, where they can be easily grasped if necessary. The fixing of the glass pane in the window frame 15 takes place by a strand of adhesive 16 which is placed in the channel type depression of the profile section 3 with the aid of a suitable injection nozzle and the sheet glass thus prepared being inserted towards the window frame under the application of pressure. As this occurs, the adhesive composition 16 completely fills the channel type cavity and adhesively attaches to the adhesive flange 17 of the window frame. The adhesive composition 16 does not enter into the adhesive bond with the profile section 3, nor with the rope 10. If, in an emergency, the glass sheet is to be hit, the rope end 11 is grasped by hand and the rope 10 pulled from the profile frame 3 pulling in the direction of the arrow F , while at the same time, the glass sheet 1 is pressed from the frame 15 in the direction of the arrow P. After the removal of the glass sheet 1, made in this way, the glass sheet is completely released from the frame of window 15, as shown in figure 5. If, as is generally the case with tempered, single-layer safety glass sheets, the glass sheet 1 does not break during this removal, the glass sheet provided with the profile frame 2 can be fixed once more in the window frame. For this purpose, the previously hardened adhesive thread 16 is removed from the adhesive flange 17, and the channel of the profile section 3 is again filled with a new adhesive composition. The solutions depicted in Figures 6 to 8 are based on the principle that the glass sheet 20 is provided with a profile frame 21, which, because of its cross-sectional design, can be released from the hardened bed of adhesive in the 22 corner region with very little qasfo de tuerza, while ot? \? to ma has a relatively solid connection with respect to the adhesive flange of the window frame as a result of a strong fit between the profile frame and the hardened bed of adhesive. The distance S with little lace should be approximately 20 to 30 cm in both directions respectively. In principle, different variants are possible for the transversal design of the profile frame. For example, Figure 7A shows a cross-sectional shape, as is known and usual for glass sheets of the generic type. The profile frame has approximately the same cross section as that of the profile frame shown in Figures 2 to 5, and has a lower section 23 and also two lateral strips 24 and 25, which are provided on the inner side with projections of anchor 26. In the corner region 22, however, the sidebands 24 'and 25' have no anchoring projections, but also have smooth, limiting walls on the interior wall. As a result, in this corner region 22 the forces required to release the glass sheet are significantly less in the region of the remaining frame. In the case of the profile frame embodiment shown in Figures 8A and 8B, the biased cuts required for engagement are not provided on the inner side of sidebands 28 and 29, but are located on an additional center band 00. . This central band 30 has at the upper end side projections 31, which perform the anchoring function. In the corner region 22, on the other hand, these anchor projections 31 are not presented on the central band 30, as revealed in Figure 8B, which shows a section along the line B-B. The profile frames shown in Figures 6 to 8 are also preferably produced by extruding a suitable polymer onto the glass sheet. The change of the cross section in the corner region 22 can, in this case, be carried out during the extrusion operation in a relatively simple manner using an extrusion die from which the cross section of the die can be changed in the form desired during the extrusion operation on the distance S by means of a slide. An extrusion die suitable for this purpose is found, for example, in DE 4031236 Bl.

Claims (8)

1. A glass sheet intended for adhesive fastening, with a profile frame that is made of an elastomer and has on the opposite side of the adhesive flange of the window opening a profile section in the shape of a channel, in cross section, provided with slanted cuts and / or anchoring projections, to receive the adhesive composition by establishing the adhesive bond with respect to the adhesive flange of the window opening, the connection in which with the profile frame takes place if adhesive bond by mechanical locking of the hardened adhesive composition with the biased cuts and / or anchoring projections of the profile section in the shape of a channel, characterized in that it is disposed on the bottom of the channel type depression of the profile section, provided with biased cuts and / or anchorage projections, at least on part of the profile frame, a flexible rope, of which at least one end section, is at and it can be fastened on the side facing the inner compartment, and with the aid of which the mechanical locking between the hardened adhesive bed and the inner band of the channel-shaped profile section can be released.

2. The sheet of glass in accordance with LC Lvindieaeión 1, caterized poique cord tb-xibLe is arranged at the base of the inner band of the profile section of channel type.

3. The glass sheet according to claim 1 or 2, characterized in that the flexible cord is arranged together with the entire periphery of the window sheet.

4. The glass sheet according to claim 3, characterized in that both end sections of the flexible rope lie on the profile frame and can be secured on the inside. The glass sheet according to one of claims 1 to 4, characterized in that the flexible cord is provided with a coating that reduces or prevents adhesion with respect to the adhesive composition. 6. A glass sheet intended to be used for adhesive fastening, with a profile frame that is made of an elastomer and has on the opposite side of the adhesive flange of the window opening, a profile section in the shape of a channel in cross section, provided with skewed cuts and / or anchoring projections, to receive the adhesive composition by establishing the adhesive bond with respect to the adhesive flange of the window opening, the connection of which with the profile frame, takes place without union adhesive by mechanically locking the hardened adhesive composition with the biased cuts and / or anchoring projections of the profile section in channel form, characterized in that the mechanical anchoring by the biased cuts and / or anchoring projections is reduced in one section locally limited profile frame such that the start of the glass sheet release operation is possible in this section without the help of tools. The glass sheet according to claim 6, characterized in that the locally limited section of the profile frame is provided with a reduced anchorage in the case of a windshield in the lower corner region along the vehicle driver. 8. A glass sheet according to claim 6 or 7, characterized in that the region with a reduced anchor has a longitudinal extension of 20 to 60 cm.