Note: Descriptions are shown in the official language in which they were submitted.
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Adhesive anchor for insertion into a lightweight building panel
The present invention relates to an adhesive anchor having a screw-in channel
for a fastening
screw for insertion into a lightweight building panel which comprises a first
and second cover
panel made of wood or wood-like material, and an interposed center layer in a
honeycomb
structure, wherein the adhesive anchor can be fixed in the lightweight
building panel in the
mounted state by means of an adhesive and penetrates a bore in a cover panel
and rests on the
cover panel opposite the drilled-through cover panel with a front end thereof,
and is
positioned flush inside the bore with the other end thereof.
Adhesive anchors of the kind mentioned above are known and are used to enable
the fixing of
fitting parts or the like also to a lightweight building panel, with the loads
in the connection
area usually being static and relatively low.
The present invention is based on the object of providing an adhesive anchor
of the kind
mentioned above which also enables the secure connection of components in
lightweight
building panels which are exposed and highly loaded both dynamically as well
as statically,
especially the secure connection of a table-leg of a lightweight building
panel used as a table
top.
This object is achieved in accordance with the invention in such a way that
the front end
resting on a cover panel has a support edge protruding in the direction of the
longitudinal axis
of the adhesive anchor, and the adhesive anchor is provided with flow channels
which rise
from said front side and open into radially extending discharge openings in
the region which
rests flush within the bore.
As a result of the fact that the adhesive anchor is provided with a support
edge in its front
region resting on the cover panel and a front area which is set back in
relation to said support
edge, virtually the entire diametrical area of the adhesive anchor can be used
for tightly
gluing on the non-drilled cover panel. As a result of the possibility to
provide an adhesive
starting from here up to the upper section on the circumferential side of the
adhesive anchor,
this upper region which is disposed in the bore in the mounted state can be
glued additionally
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in the bore, thus achieving extremely high stability of the adhesive anchor in
the mounted
state.
Since the screw-in bore is only used in the adhesive anchor in accordance with
the invention
to screw in a fastening screw, this screw-in bore can be dimensioned under
consideration of
the material employed for producing the adhesive anchor in such a way that the
secure
automatic cutting in of the fastening screw within the adhesive anchor is
ensured. This
measure too considerably increases high strength and stability of a desired
connection.
Further features are the subject matter of sub-claims.
Embodiments of the invention are shown in the enclosed drawings and will be
explained
below in closer detail, wherein:
Fig. 1 shows a sectional view through an adhesive anchor in accordance with
the invention
perpendicularly to its longitudinal axis, which anchor has been inserted in a
corner region of a
lightweight building panel;
Fig. 2 shows a sectional view along the line II-II in Fig. 1 with an indicated
table-leg which is
fixed to the adhesive anchor in preliminary mounting;
Fig. 3 shows a sectional view along the line III-III in Fig. 1;
Fig. 4 shows a perspective view of the adhesive anchor in a preliminary
mounting position,
which anchor consists of a sleeve-like component and a plug-in peg;
Fig. 5 shows a bottom view of the adhesive anchor in the direction of arrow V
in Fig. 4;
Fig. 6 shows a sectional view along line VI-VI in Fig. 5;
Fig. 7 shows a sectional view along line VII-VII in Fig. 5 which is rotated by
90 ;
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Fig. 8 shows a perspective view of an adhesive anchor in accordance with the
invention
which is inserted in the corner region of a lightweight building panel with a
table-leg
disposed in the preliminary mounting position;
Fig. 9 shows a view in the direction of arrow IX in Fig. 8;
Fig. 10 shows a sectional view along the line X-X in Fig. 9;
Figs. II a to l ld show different perspective views of a sleeve-like component
of the adhesive
anchor according to the embodiment according to Figs. 8 to 10;
Figs. 12a to 12d show different perspective views of a plug-in peg of the
adhesive anchor
according to the embodiment according to Figs. 8 to 10;
Fig. 13 shows a sectional view through an adhesive anchor in accordance with
the invention
with a table-leg fastened thereto, which dowel is inserted in the corner
region of a lightweight
building panel;
Fig. 14 shows an axial sectional view through the adhesive anchor according to
Fig. 13;
Fig. 15 shows a perspective view of a sleeve-like component of the adhesive
anchor
according to the Figs. 13 and 14;
Figs. 16a and 16b show different perspective views of a plug-in peg of the
adhesive anchor
according to Figs. 13 and 14;
Fig. 17 shows a top view of the corner region of a lightweight building panel,
to which a
table-leg is fixed by means of an adhesive anchor according to a further
embodiment of the
invention;
Fig. 18 shows a sectional view along line XVIII-XVIII in Fig. 17;
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Fig. 19 shows a perspective view of the corner region of the lightweight
building panel
according to Fig. 17 with inserted adhesive anchor;
Fig. 20 shows a perspective view of the lightweight building panel according
to Fig. 18 with
fixed table-leg;
Figs. 21 a and 21 b show different perspective views of the adhesive anchor
according to the
embodiment according to Figs. 17 to 20;
Fig. 22 shows a top view of the adhesive anchor according to Figs. 21 a and 21
b;
Fig. 23 shows a view in the direction of arrow 23 in Fig. 22;
Fig. 24 shows a perspective top view of the adhesive anchor according to Figs.
22 and 23;
Fig. 25 shows a bottom view of the adhesive anchor according to Figs. 22 to
24;
Fig. 26 shows a sectional view along line XXVI-XXVI in Fig. 25;
Fig. 27 shows a view in the direction of arrow XXVII in Fig. 26, shown partly
in a sectional
view;
Fig. 28 shows a bottom view of the adhesive anchor which is rotated by 45 in
relation to Fig.
25;
Fig. 29 shows a sectional view along line XXIX-XXIX in Fig. 28;
Fig. 30 shows a sectional view along line XXX-XXX in Fig. 28.
The drawings show a total of four different embodiments of adhesive anchors in
accordance
with the invention, with these adhesive anchors being provided consistently
with reference
numeral 1.
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Figs. 1 to 7, 8 to 12 and 13 to 16 each show a two-part adhesive anchor 1,
whereas the
embodiment according to Figs. 17 to 30 shows a one-piece adhesive anchor 1.
Such an adhesive anchor I is generally determined for being inserted into a
lightweight
building panel which is designated in its entirety with reference numeral 2.
The lightweight building panel 2 consists in the known manner of a first and
second cover
panel 3, 4 and an interposed center layer 5 which has a honeycomb structure in
the known
manner. For reasons of clarity, the more detailed view of this honeycomb
structure in the
region of the center layer 5 has been omitted.
The two cover panels 3 and 4 are preferably made of wood or a wood-like
material.
Every adhesive anchor 1 is provided with a screw-in channel 6 which is used
for
accommodating a fastening screw 7, by means of which a table-leg 8 shall be
fastened for
example to a lightweight building panel 2 which is used as a table top.
In order to ensure secure fixing of the table-leg 8 which can be subjected
both to high static
and dynamic loads, it is very important that an adhesive anchor 1 can be fixed
in a very
secure manner within the lightweight building panel 2.
In order to achieve this goal, it is provided in all adhesive anchors 1 which
are inserted
through a bore 9 in one of the cover panels 4 into the lightweight building
panel 2 and rest on
the inside of the other cover panel 3 opposite of the bore 9 that the front
end resting on the
cover panel 3 comprises a support edge 10 protruding in the direction of the
longitudinal axis
of the adhesive anchor 1, so that a chamber 12 is formed between the cover
panel 3 and the
front end of the adhesive anchor 1 which is set back by the protruding support
edge 10, with
the area of the chamber corresponding to virtually the entire area of the
adhesive anchor 1.
Said chamber 12 can now be filled completely with an adhesive, glue or the
like, so that
every adhesive anchor 1 is glued together with the cover panel 3 over its
entire surface area.
Furthermore, every adhesive anchor 1 is provided at its end opposite of the
support edge 10
with a circumferential collar 13 which rests at least partly flush within the
bore 9. An
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adhesive, glue or the like is also used in the region of this mutual contact
in order to securely
fix the adhesive anchor 1 within the bore 9.
The features as described above are provided in all illustrated embodiments,
so that only the
special design features of the different embodiments will be explained below
in closer detail.
Notice must be taken with respect to Figs. 1 to 7 that the adhesive anchor 1
illustrated there
can also be fixed to the trimming strips 14 of a lightweight building panel 2
which is used as
a table top. For this purpose, the adhesive anchor 1 is equipped with grooves
15 which are
preferably arranged to be offset at an angle of 90 with respect to one
another according to
the mentioned Figs. 1 to 7, which grooves offer the possibility in the support
region of the
adhesive anchor 1 in relation to the trimming strips 14 to anchor the adhesive
anchor 1 in
addition in relation to the trimming strips 14 by adhesive or glue or the like
introduced into
these grooves 15. This is shown especially in the illustration according to
Fig. 1.
Moreover, the adhesive anchor 1 according to the Figs. I to 7 consists of a
sleeve-like
component 16 and a plug-in peg 17 that can be introduced into said component
16. As is
shown especially in the perspective illustration according to Fig. 4, the plug-
in peg 17 is
equipped at one end with a cover 18 whose area corresponds to the area of the
sleeve-like
component 16. After the introduction of the plug-in peg 17 into component 16,
the cover
forms the upper end of the two-part adhesive anchor 1.
The plug-in peg 17 comprises the mentioned screw-in channel 6 for a fastening
screw 7.
The plug-in peg 17 is provided on the outside with longitudinal grooves 19
which extend in
the direction of the longitudinal axis of the plug-in peg 17, of which several
longitudinal
grooves 19, but at least two thereof, are distributed over the circumference
of the plug-in peg
17. The elevated sections of the plug-in peg 17 which delimit the longitudinal
grooves 19 rest
in a virtually sealing manner on the walls of an insertion opening 20 of the
sleeve-like
component 16. The longitudinal grooves 19 extend in the axial direction up to
the region of
the bottom face 11 of the sleeve-like component 16 and extend on the other
hand up to the
upper side of the component 16 and converge there into radially extending
outlet openings
which are disposed in the region of the collar 13.
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The screw-in channel 6 of the plug-in peg 17 is sealed in the axial direction
in its bottom end
disposed away from the cover 18. In this bottom region, there are two lateral,
radially
extending filling openings 21 which each open into a longitudinal groove 19 of
the plug-in
peg 17.
As a result of the described construction, the transport of a fluid adhesive
or glue to all
relevant and desired points is not easily possible. A suitable tool is
immersed to such an
extent into the screw-in channel 6 that this tool lies with its bottom end in
the region of the
filling openings 21 of the plug-in peg 17. This tool is used to convey fluid
adhesive, glue or
the like via the filling openings into the region of the longitudinal grooves
19. These
longitudinal grooves 19 form flow channels with the respectively opposite wall
regions of the
insertion opening 20, which flow channels open at the bottom side into the
region of the
chamber 12 disposed there and at the upper side into radially extending outlet
openings, so
that the fluid adhesive, glue or the like can be introduced into the region of
the chamber 12 as
reliably as into the opposite upper region of collar 13 which is disposed
within the bore 9.
Since the grooves 15 further extend up to the region of the chamber 12 in the
jacket region of
the sleeve-like component, these grooves 15 are also filled in a rising manner
with adhesive
or glue, so that a reliable gluing of the adhesive anchor 1 can be made within
the non-drilled
cover panel 3, the trimming strips 14 and the bore 9 of the upper cover panel
4.
This ensures optimal fixing of the adhesive anchor in relation to the
lightweight building
panel 2. The upper region of the screw-in channel 6 which is used for twisting
in the
fastening screw 7 is completely free of glue and is dimensioned in its
entirety in such a way
that a fastening screw 7 will tightly anchor in this screw-in channel 6 in the
manner of a self-
cutting screw.
The adhesive anchor 1 is made in its entirety of plastic, which means both the
sleeve-like
component 16 and the plug-in peg 17 with its cover 18 are made of a suitable
plastic.
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As a result of this construction and fixing of the adhesive anchor 1, a table-
leg 8 can be
connected in a fixed and compensating manner to the lightweight building panel
despite the
use of an inexpensive lightweight building panel 2.
As is shown especially clearly in Figs. 6 and 7, the outlet openings 22 which
have already
been mentioned above and extend radially to the outside are disposed between
the upper side
of the sleeve-like component 16 and the bottom side of the cover 18 of the
plug-in peg 17, so
that any adhesive, glue or the like that reaches there can not only reach the
region of the
collar 13 disposed within the bore 9 but can also glue and connect the cover
18 with the
sleeve-like component 16.
The adhesive anchor 1 according to Figs. 8 to 12 differs from the adhesive
anchor 1
according to the aforementioned embodiment according to Figs. I to 7 by a
smaller diameter
on the one hand, and by the fact on the other hand that no grooves 15 are
provided in the
circumferential region of the sleeve-like component 16 and especially by the
fact that the
screw-in channel 6 extends offset from the center in relation to the
longitudinal axis of the
adhesive anchor 1.
In all other respects, the configuration of the adhesive anchor 1 according to
the Figs. 8 to 12
functionally corresponds to the aforementioned embodiment, i.e. in this case
too flow
channels are formed by the arrangement of the plug-in peg 17 with its
longitudinal grooves
19, by means of which adhesive, glue or the like can be introduced securely
into the bottom
region of the adhesive anchor 1 which rests on a cover panel and into an upper
region of the
adhesive anchor 1 which rests in the region of the bore 6 of the other cover
panel 4, so that an
optimal connection is ensured between the adhesive anchor 1 and the respective
contact
regions of said adhesive anchor 1 in relation to a lightweight building panel
2.
As is shown especially clearly in Figs. 11b and 1 ld, the sleeve-like
component 16 is provided
on the bottom side again with an axially protruding support edge 10, so that
the respective
front end 11 of this component 16 is set back in relation to the contact plane
of the support
edge 10. A chamber is thus formed again by the front end 11, the support edge
10 and the
area of the cover plate 3 on which the support edge 10 rests, to which
adhesive or glue can be
supplied for gluing the adhesive anchor 1 over the entire surface area in the
contact region to
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the non-drilled cover panel 3. As a result of the analogously formed flow
channels, the upper
region of the adhesive anchor 1 which forms a collar 13 is securely glued in
the bore 9.
Furthermore, the cover 18 of the plug-in peg 17 is tightly connected with the
sleeve-like
component 16 by gluing, sizing or the like.
An adhesive anchor 1 is also realized in the embodiment according to the Figs.
13 to 16,
which anchor is formed in two parts and made of a sleeve-like component 16 and
a plug-in
peg 17. The insertion opening 20 for the plug-in peg 17 is arranged centrally
again and flow
channels are formed again by the longitudinal grooves 19 of the plug-in peg 17
in the above
described manner in conjunction with the walls of the insertion opening 20,
which flow
channels extend from the bottom side of the adhesive anchor 1 to the upper
region and open
there into radial outlet openings 22.
An adhesive anchor which is arranged in a comparatively simple way according
to Figs. 13 to
16 and also has a relatively small diameter will preferably be used when
components are to
be connected to a lightweight building panel which is not subjected to
extremely high loads.
Figs. 17 to 30 show an adhesive anchor 1 in a single-piece configuration. It
can be seen that
this single-piece configuration comprises a separate filling bore 23 for an
adhesive or glue in
addition to the screw-in channel 6 for accommodating a fastening screw 7. Said
filling bore
23 extends through the entire adhesive anchor I and opens on the bottom side
into the
chamber 12 which is delimited by the axially protruding support edge 10, the
non-drilled
cover panel 3 and the front end 11 of the adhesive anchor 1 which is not set
back in relation
to the support edge 10. Glue can be introduced into said chamber 12 from the
upper side of
the adhesive anchor 1. Starting from this chamber 12, rising bores 24 which
form flow
channels extend to the upper side of the adhesive anchor 1 up to the region of
the radial outlet
openings 22 which are disposed in the region of an upper circumferential
collar 13 which is
disposed in the bore 9 of the drilled-through cover panel 4 in the mounted
state of the
adhesive anchor 1.
In this construction, the guidance for the adhesive or glue occurs in the
manner that the
adhesive or glue pressed at first through the filling opening 23 into the
region of the bottom
front end 11 of the adhesive anchor, is pressed upwardly from there via the
risers 24 and into
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the region of the collar 13 via the radially extending outlet openings 22 and
thus into the
perforated wall region of bore 9 of the drilled-through cover panel 4.
It is therefore also ensured in this single-piece embodiment that the adhesive
anchor 1 is
glued together over its entire area with a non-drilled cover panel 3 and
additionally in the
perforated wall region of the bore 9 of the drilled-through cover panel 4.
Notice shall be taken by reference to Fig. 25 that guide ribs 25 are provided
in the region of
the bottom end of adhesive anchor 1 which is covered by the support edge 10,
which guide
ribs ensure an even distribution of the glue or an adhesive over the area of
the adhesive
anchor 1.
Comparable guide ribs 25 in other geometrical arrangements can also be
provided in the
adhesive anchors 1 according to the embodiments as described above.
There is the possibility in the two-piece arrangements to provide the cover 18
of the plug-in
peg 17 at least in sections with such a thin configuration that a certain
transparency is
achieved, so that it is clearly recognizable to the fitter when the filled-in
adhesive or glue has
reached up to the region of the radial outlet openings 22. The further supply
with adhesive or
glue can then be stopped immediately and the undesirable leakage of adhesive
or glue can be
prevented.
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List of reference numerals
1 Adhesive anchor
2 Lightweight building panel
3 Cover panel
4 Cover panel
Center layer
6 Screw-in channel
7 Fastening screw
8 Table-leg
9 Bore
Support edge
11 Front end
12 Chamber
13 Collar
14 Trimming strips
Grooves
16 Sleeve-like component
17 Plug-in peg
18 Cover
19 Longitudinal grooves
Insertion opening
21 Filling opening
22 Outlet opening
23 Filling bore
24 Riser bores
Guide ribs
