FI109111B - Glass pane, in particular for motor vehicles, ready to mount by bonding - Google Patents

Description

109111

FIELD OF THE INVENTION The present invention relates to a glass pane specifically for motor vehicles which is ready to be mounted by means of an adhesive fastener. to this end, is provided with a frame profile made of soft resilient plastic which has a U-shaped cross-sectional shape and which receives the 10 fastening strips required for installation, and a frame profile and a hardened fastening joint secured by mechanical locking between retaining tabs and cured mounting mass.

This type of motor vehicle glass pane, ready to be mounted with an adhesive fastener, is described in patent application EP-A-0 620 134. This 15 motor vehicle glass pane, already known, has a U-shaped frame structure with a groove in the U-shaped section of the profile. : · ·: Looking like a spruce tree, with the groove actually reaching the bottom of the groove towards its mouth.

• * 'Prefabricated glass panes such as those described above have one of the most useful features. After installing the glass panes, they can actually be easily - '.:. • remove them by pulling them upwards without damaging the mounting strip, as is usually the case with other adhesive glass panes. In this case, the flanges of the U-shaped profile move apart due to mechanical puffing and easily detach from the hardened fitting strip.

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'* 25 After removal, the glass pane can then be reused, which is noteworthy:' · an advantage in the motor vehicle manufacturing process when it is necessary to repair: for example, painting a chassis near a window frame, whereupon '·, the glass pane must be removed.

. ,,: However, in this case, it is necessary, first of all, to reinstall the cured fastener, which is glued to the edge of the window frame, with the help of a mechanical cutting tool, and then to the groove of the U-shaped profile. , fit a new mounting strip before installing the glass pane. Next, it is considered that the glass pane will not be subjected to the slightest load immediately after its installation; in particular, it is strongly recommended that it should not be subjected to any mechanical stress while the new fastening compound is curing, this being a major limitation.

It is an object of the invention to provide a motor vehicle glazing panel of the type described above to facilitate its reinstallation after the first disassembly, and that the waiting time, which is essential for the fitted glass pane to achieve its maximum strength after reinstallation, is significantly shorter.

This object can be achieved in accordance with the present invention by a window pane to be mounted and detached from the window aperture 10, in particular a motor vehicle window pane with a frame made of soft flexible plastic with a groove receiving an attachment strip attached thereto as a window. at the edge of the aperture and which cures when the glass pane is mounted, in said groove having at least one projection 15 which holds the fastening strip in place and the fastening between the soft elastic plastic frame and the fastening strip secured by a mechanical central locking mechanism; as well as the shape of the groove, such that, once the fastening strip has cured, it can be removed from the groove without any damage. In the most preferred embodiment of the invention, the ': 1': 20 has a widened cross-section in the groove of the frame and has at least one protrusion near its mouth. The depth of the groove below the projection is preferably greater: ':': than the thickness of the projection. Preferably, the circumference also has at least one recess near the bottom of the groove.

"Thus, in the present invention, the transverse structure of the profile, which is designed to receive the adhesive required for the installation of the glass pane, is geometrically designed to saturate the soft flexible plastic." The elastic profile of the sealed profile, i.e. the elastic flexibility of the U-shaped profile flanges and the retaining projections therein, can not only be removed from the cured fastening strip, but can also be later reinstalled in the same fastening strip already in place by locking they are interconnected by mechanical compression, as already mentioned.

This way, the glass pane can be reinstalled in a very short period of time, with the joint having its original strength as soon as the glass pane is installed 3,109,111! so that it can be handled or subjected to other types of load immediately after installation.

Naturally, the geometry of the transverse structure of the frame may be subject to a variety of variations. It may be adapted to the elastic properties of the used soft and flexible plastic and may also depend on the dimensions of the profiled frame used. In some cases, it may be necessary to perform several tests to obtain a favorable transverse structure. The same applies to geometry, dimensions and the number of retaining projections. Sometimes it may be sufficient to use only one retaining bracket. However, for reasons of symmetry, it is recommended that both flanges of the U-shaped profile 10 be provided with one or more such projections.

Other features and advantages of the present invention will be apparent from the appended claims and from the following description which illustrates various designs which are also shown in the figures.

Of the following cross-sectional patterns, Figure 1 shows a frame according to the present invention which is provided with . ·. a retaining projection on a U-shaped profile on one flange; * * Fig. 2 shows a frame according to the present invention having a retaining projection ': on both flanges of a U-shaped profile, and finally; Fig. 3 shows another frame model according to the present invention.

For the operation of the assembly according to the present invention, it is important that:, '.: The two parts of the joint, namely, first, a U-shaped profile provided with retaining projections and, on the other hand, a mounting mass used for mounting the glass pane. not attached to each other, but that the glass pane attaches to the window frame of the frame only by mechanically securing the cured fastening strip * ·; 25 grooves in the profile and the projections therein. In this case, it is clear that material which is not attached to the profile material when installing the glass: '': panel is used as the attachment mass. EP-A-0 620 134 mentions substances suitable for this purpose. In addition, it is possible to use a thermoplastic polyolefin elastomer based on isotactic polypropylene and ethylene propylene diene rubber such as Santoprene made by Advanced Elastomer Systems for the frame profile, while the material used as the adhesive may be made from a one-component polyurethane , such as Betaseal from Gurit-Essex. Due to the elastic properties of these two materials and the fact that they do not adhere to other surfaces, their use in fact achieves very favorable conditions.

5 In each of the following examples, a U-shaped profiled frame is mounted on a glass pane. However, the principle of the invention can also be applied so that, on the contrary, the U-shaped profiled frame is placed at the mounting edge, while the mounting adhesive itself adheres to the glass pane. However, for technical reasons, it is generally preferable to equip the glass pane with a second profile of U-form 10. In addition, frames are often stored in the same factory where the glass panes are also manufactured or packaged.

In addition, the process of manufacturing the profiled frames is not very important with respect to the functionality of the glass pane fitting system of the present invention. Thus, in the case where the grooved profile is first fitted to the mounting edge of the motor vehicle body 15, a prefabricated frame made of a suitable one may be provided. of elastomer and having a U-shaped cross-section according to the invention, simply attaches by adhesive to the attachment edge, after which the adaptable attachment strip can be extruded to this same edge by its U-shaped *. · Using a suitable extrusion tool. The glass pane is attached '*' ': 20 then to this mounting strip at the factory where the glass pane is fitted. On the other hand, if a profiled frame has to be attached to a glass pane, it must be pre-fabricated: '; *; and then glue it to the glass pane, or else extrude it into the glass. However, it is also possible to make a profiled frame of a glass pane with a cap. : Selection or injection molding technology, or alternatively using the RRV process. 25 (reaction injection molding). Note that all these processes are part of the '! 'Techniques that are well known today.

Fig. 1 illustrates one type of elastomeric frame / attachment-mastic combination according to the present invention. This view is a cross-sectional view of the peripheral region of the motor vehicle glass pane 1 and the window of the body. · 30 fixing holes 2 for the nail frame, to which the glass pane 1 is fastened with an adhesive fastening.

In this presentation, glass pane 1 is shown in its monolithic form, i.e., as a tempered safety glass plate. However, it can, of course, be a glass pane consisting of several components, for example laminated glass. In the region where the edge of the glass pane 1 is 5,109,111 against the mounting edge 2, the glass pane 1 is provided with a coating 3 which forms the frame and is made of colored oven enamel. When the coating 3 has been suitably treated with suitable adhesion promoters, the profiled elastomeric frame 4 will adhere firmly to the frame coating 3.

For example, the profiled frame 4 may be manufactured using an extrusion process with a suitable thermoplastic elastomer extruded into a glass pane 1. This process, as well as a device suitable for performing it, is described in the aforementioned patent application E-A-0 620 134.

The profiled frame 4 has substantially, with respect to the model shown herein, a transverse-10 structure provided with a U-shaped groove having a base 5 and two flanges 6 and 7. The groove is expanded, i.e., the inside 8 of the flange 6 and the flange 7. the inner side 9 being inclined outwardly so that the width b of the base 5 is substantially less than the opening B which separates the upper ends of the flanges 6 and 7 at a point where they are furthest apart. The inwardly inclined retaining projection 10, i.e. the inclined retaining projection 10 inclined towards the recess U-shaped in the profile 15, is disposed at the edge of the flange 7.

; In order to accomplish the installation by adhesive mounting, the mounting strip connecting the glass pane to the mounting edge of the window aperture 2 is injected in a paste-like form into a 4 U-shaped recess of the profiled frame.

When the U-shaped recess is filled with mounting mass, the glass pane 1 ';;; * 20 to the 2 mounting edges of the window opening. This mass then expands and completely fills the profiled frame • '· 4 U and at the same time attaches to the window frame edge 2. However, no adhesion occurs between the mounting mass and the profiled frame 4, · · · 4. Once the mass has cured, the joint 't' is achieved by merely locking the retaining tab 10 into the corresponding notch 12 in the cured attachment strip 13.

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', ..: In the case shown in Fig. 1, the glass pane can be removed from its mounting position,. when the fastening strip 13 is completely cured. During this removal, the materials of the perimeter, · ·, and the hinges, as well as the material of the fastening strip and the grooves, are such that, after curing, the fastening strip can be pulled out of the groove without damage. This same glass pane will later be reinstalled at this same location simply by applying mechanical pressure. Since the transverse structure of the cured fastening strip 13 corresponds to the internal transverse structure of the profiled frame 4, the fastening strip 13 is mounted so that its protruding narrow edge is introduced into an upwardly extending U-shaped recess of the profiled frame 4. During this operation, the retaining projection 4 and / or flange 7 elastically yields until the attachment strip 13 and the profiled frame 4 are completely aligned with one another. The retaining projection 10 then returns to the recessed notch 12, again making the original joint 5 between the glass pane and the attachment edge of the window aperture 2. It can be seen that the thickness of the projection 10 is not equal to the depth of the channel below it. This feature is important because it follows that the projection in the groove of the profile attached to the glass pane (if the two materials have the same modulus of elasticity) is more easily twisted than that portion of the hardened fastener below the notch 12 10 (exactly matching the projection in the groove) It follows that, when the two elastomers are separated, the more flexible projection 10 is elastically deformed, thereby preventing any continuous deformation and / or tearing of the fastening strip 13, which would occur if the projection were substantially thicker.

Figure 2 shows a profiled frame 16 of the model shown, with which the glass pane 1 is provided, 15 also having a groove of transverse construction. Further, in this case, this frame 16 is also provided with an element consisting of a lip-shaped profile 17 which extends beyond the periphery of the glass pane 1 and acts as a sealing and centering lip when the glass pane is mounted in the window opening.

This lip 17 also allows the glass pane 1 to remain firmly in place in the window frame 20 during curing of the fastening strip so that it is not necessary A: to use other additional means to keep the glass pane in place.

Also, in this case, the groove of the profile 16 consists of a bottom 18 and two flanges 19A and 20. The inside of these, 21 and 22, are inclined, also here, so that the U-shaped recess extends upwards. The flanges 19 and 20 are each provided with retaining-25 projections, which are inwardly directed and provided with reference numerals 23 and 24, respectively. These projections 23 and 24 form a mechanical connection between the profiled frame 16 and the hardened fastening strip 25 because they protrude; 1. 1; into the notches, which are provided with reference numerals 26 and 27 respectively.

»» «I · '·; · 'The dimensions of the retaining projections 23 and 24, the flanges 19 and 20 and the profiled frame 16 and:': the geometrical shape of the 30, as well as the elastic self-components of the two elements 30, 37; again, the fittings are defined in this respect so that, on the one hand, the locking joint is formed when the glass pane 1 is mounted on a window frame provided with a cured fastening strip 25 and, on the other hand, the formed joint has the desired strength. 7 109111 of two interconnected elements exposed to continuous distortion or breakage.

With respect to the pattern shown in Figure 3, the flanges 31 and 32 of the profiled frame 30, including the projections 33 and 34, are theoretically the same dimensions and the same geometric shape 5 as the pattern shown in Figure 2. However, this time the base 35 is provided with a hollow space 36. This hollow space is shown in the figure below the bottom of the groove in a square cross-section, but may also be of other shapes. It is there only to increase the flexibility of the frame as the side walls 31, 32 of the groove move apart to lower the cured fastening strip 37 into the groove.

In fact, this hollow space makes the bottom 35 easier to yield when the profiled frame 30 is pushed against the cured fastening strip 37. Thus, it is thus possible to facilitate the insertion of the retaining projections 33 and 34 into the corresponding recesses (38 and 39).

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Claims (7)

109111 i j i 8 | ! Claims i i * A glass pane (1) intended to be mounted on and removed from a window opening, in particular for a motor vehicle, provided with an elastomeric perimeter frame (4; 16; 30) having a groove -5 receives a mounting adhesive tape (13; 25; 37) which adheres to the edge of the window opening (2) and cures when the glass pane (1) is mounted with at least one projection in the groove to hold the adhesive tape in place. the connection being secured by mechanical form locking, whereby the material of the adhesive tape (13; 25; 37) does not adhere to the material of the perimeter frame (4; 10 16; 30), characterized in that the groove is extended and the perimeter frame (4; 16; 30) (13; 25; 37) The materials are such that once the mounting tape has dried, it can be pulled out of the groove without being damaged. Glass pane according to Claim 1, characterized in that the frame groove has at least one projection (10; 23, 24; 33, 34) close to its mouth. Glass pane according to claim 2, characterized in that the depth of the groove below the projection is greater than the thickness of the projection (10; 23, 24; 33, 34). A glass pane according to any one of the preceding claims, characterized in that. the peripheral frame has at least one hollow space (36) in the vicinity of the groove bottom (35). "*: 20 Glass pane according to any one of the preceding claims, characterized in that: the frame (16) has a lip (17) which extends beyond the periphery of the glass pane. A glass pane according to any one of the preceding claims, characterized in that the perimeter frame is based on a thermoplastic elastomer and that the mounting adhesive tape is based on a reactive polymer. ,. , 25 A glass pane according to claim 6, characterized in that the perimeter frame 'is based on isotactic polypropylene and ethylene propylene diene rubber and that the adhesive tape * ·; ·' is based on moisture-polymerizable one-component polyurethane:. I - <i 109111 s