[0001] In NL-C 178 531 (NL-A 82 00 970) of the same applicant a plural glass pane has been
described, comprising an assembly of at least two glass panes which are held at a
desired distance by means of distance ledges arranged along the border portions and
joining each other, and, at the outer side of said distance ledges, a cement layer
is provided for preventing penetration of moisture, and in at least one of said glass
panes holes are formed which do not communicate with the air space between said panes,
in which holes fastening means such as nails or bolts are provided for fastening fitting
elements. The holes and the nails or bolts are, then, surrounded by distance ledge
portions and cement, so that the holes open in the interspace filled with cement.
[0002] Plural glass panes constructed in this manner effectively avoid that, along the
fastening nails or bolts, leak passages are formed as a consequence of the substantial
forces acting thereon, through which passages moisture can penetrate into the interspace
between the glass panes.
[0003] According to this patent the distance ledges are provided, in the vicinity of said
holes, with re-entrant portions being led,at the inner side, along said holes, thus
defining a cement space enclosing the nails or bolts arranged therein, said space,
when providing the circumferential cement layer, also being completely filled with
cement. A consequence thereof is, however, that, on the one hand, special distance
ledges are to be used, and that, on the other hand, a cement layer is present between
said nails or bolts and the edge of the plural glass pane, said layer being visible
through the panes, which, in particular in the vicinity of handles or similar fitting
elements situated at some distance from the edge, can be objectionable. Moreover it
is not possible to arrange, in this manner, fitting elements at a larger distance
from the edge, and in particular in the centre of the glass pane.
[0004] The invention provides an improvement of the above-mentioned plural glass pane,
allowing to avoid said objections, and being characterised in that, near a hole or
several adjacent holes for the fastening means, a distance piece is provided comprising
an annular closed outer rim surrounding a chamber to be filled with cement around
the or each nail or bolt.
[0005] Said distance pieces can have such dimensions that they will be substantially covered
by the fitting elements fastened by the nails or bolts in question, so that the cement
layer is not or hardly visible, and in that, in the case of fitting elements situated
near the edge of the glass pane, a cement layer extending to the edge is no longer
present. Moreover normal straight distance ledges can be used at the edge of the
plural glass pane. It will, for the rest, be clear that in the case of a fitting element
such as a hinge arranged near the edge and in particular in the corners, the above-mentioned
known distance ledges can be used without any objection.
[0006] Such a distance piece can be filled with cement through a hole in one of the glass
panes, before the nail or bolt in question is provided therein or has been completely
inserted.
[0007] In particular the distance piece according to the invention has a circular outer
edge, so that, when being put in place, it is not necessary to pay attention to the
orientation thereof, and a rotation caused by, for instance, tensioning forces, is
not objectionable.
[0008] In order to obtain a good location, the distance piece of the invention is preferably
provided with one or more central sleeves each being connected by spokes with the
rim, and being provided with a central bore for accommodating a nail or bolt, passages
communicating with the cement receiving chamber being provided for allowing the cement
chamber to be filled with cement.
[0009] Preferably said sleeves are extended at both ends beyond the end faces of the outer
rim by end portions fitting into the holes of the glass panes.
[0010] The invention will be elucidated below by reference to a drawing, showing in:
Fig. 1 a partial section through a plural glass pane according to the invention; and
Fig. 2 a representation in perspective with partially removed portions of a distance
piece for such a glass pane.
[0011] In Fig. 1 a part of a plural glass pane according to the invention is shown. It comprises
two glass panes 1 being held at a given distance in the edge portions by means of
profile ledges in the manner described in NL-C 178 531, the internal air space 2 providing
the desired insulation. These circumferential profile edges are sealed against moisture
by means of an uninterrupted external cement layer.
[0012] For fastening fitting elements, according to the invention use is made of a distance
piece 3 separately shown in Fig. 2. It comprises an outer ring 4 surrounding an inner
space 5, and in the centre thereof a central sleeve 6 with a bore 7 is provided which
is connected with said ring 4 by means of spokes 8. One or more openings 9 in the
sleeve 6 provide a connection between the bore 7 and the cement chamber 5. The sleeve
6 has at both sides end portions 6′ extending beyond the respective end face of the
ring 4 as clearly follows from Fig. 1. This distance piece 3 consists of a suitable
plastics material, and can be produced as a unitary element.
[0013] As shown in Fig.1, the end portions 6′ of the distance piece 3 are inserted into
holes 10 of the glass panes 1, so that the ring 4 is kept centered in respect of said
holes 10. Before inserting a fastening bolt or the like into the bore 7 of the sleeve
6, cement is injected through the bore 7 of the sleeve 6, the cement then penetrating
through the opening or openings 9 into the chamber 5 and filling the latter completely.
Before or during the insertion of a fastening nail or bolt, surplus cement is removed,
and then the interspace between the nail or bolt and the inner wall of the bore 7
can be filled with cement.
[0014] As shown the end portions 6′ of the sleeve 6 have a length which is equal to the
thickness of a glass pane 1. When mounting a fitting element, a washer or filler plate
can be placed against the glass pane 1 in question, said washer or plate having an
opening in which the end portion 6′ of the sleeve is fitting, the sleeve then remaining
unstressed. It will be clear, however, that sometimes also shorter or longer end portions
6′ can be used.
[0015] The advantage of a round distance piece is that, when being put in place, it is not
necessary to pay attention to its orientation, and a possible rotation thereof during
arranging or by other causes has no visible consequences, and also a better force
distribution is obtained.
[0016] It is, of course, also possible to use distance pieces of this kind adapted to surround
two or more holes in the glass panes 1 at a relatively small mutual distance, and
having a single continuous cement chamber. It is, of course, also possible to omit
the central sleeve 6, if a precise alignment on a hole 10 is not required.
1. A plural glass pane, comprising an assembly of at least two glass panes being held
at the desired distance by means of distance ledges extending along the edge portions
and joining each other, at the outer side of said distance ledges a cement layer being
provided for preventing penetration of moisture, holes being formed in at least one
of said glass panes which do not communicate with the air space between the glass
plates, in which holes fastening means for fastening fitting elements are provided,
which holes and fastening means are surrounded by distance ledge portions and cement,
so that said holes open into the interspace filled with cement, characterised in that near a hole (10) or a plurality of adjacent holes for fastening means a
distance piece (3) is provided, which comprises an annular closed outer rim (4) surrounding
a chamber (5) filled with cement around the or each fastening means.
2. The glass pane of claim 1, characterised in that the distance piece (3) has a circular outer rim (4).
3. The glass pane of claim 1 or 2, characterised in that the distance piece (3) comprises one or more central sleeves (6) connected
by means of spokes (8) with the rim (4), and being provided with a central bore (7)
for accommodating a fastening means, passages (9) communicating with the cement receiving
chamber (5) being provided for allowing the cement chamber (5) to be filled with cement.
4. The glass pane of claim 3, characterised in that the or each sleeve (6) is extended at both ends beyond the end faces of the
outer rim by means of end portions (6′) fitting into corresponding holes (10) of the
glass panes (1).
5. A distance piece adapted to be used in a plural glass pane of any one of claims
1..4.