Adhesive dowel for a lightweight construction board, lightweight construction board and method for mounting an adhesive dowel in a lightweight construction board

Abstract

An adhesive anchor (1) for a lightweight panel (20) has a hollow cylindrical anchor body (2) with a closed outer surface (12), a central bore (3) extending from an upper end face (5) of the anchor body (2) to a lower end face (5) of the anchor body (2) for receiving a screw and for introducing adhesive, several distribution channels (6) extending from the central bore (3) for conveying the introduced adhesive from the central bore (3), and several outlet channels (7, 9) adjoining the outlet channels (6) for conveying the introduced adhesive to the outside of the anchor body (2), wherein the adhesive anchor (1) is formed in one piece. Furthermore, a lightweight panel (20) and a method for mounting an adhesive anchor (1) in the lightweight panel (20) are described.

Description

[0001] The present invention relates to an adhesive anchor according to the preamble of claim 1.

[0002] The invention further relates to a lightweight panel with an adhesive dowel and a method for mounting an adhesive dowel in a lightweight panel.

[0003] Such adhesive anchors are used to create a fixed point / screwing point in a lightweight panel. These lightweight panels essentially consist of two relatively strong outer layers and a softer inner core between them.

[0004] A generic adhesive anchor is known, for example, from DE 20 2008 013 067 U1.

[0005] A disadvantage of the generic adhesive anchor is the relatively complicated structure of the multi-part adhesive anchor described there, which is associated with relatively high manufacturing costs.

[0006] The object of the present invention is to further develop an adhesive dowel for a lightweight panel in such a way that it is relatively simple in construction and can be easily mounted into a lightweight panel.

[0007] The stated objects are achieved by an adhesive dowel for a lightweight panel having the features of claim 1.

[0008] The object is also achieved by a lightweight panel having the features of claim 13 and by a method for mounting an adhesive dowel in a lightweight panel having the features of claim 17.

[0009] The adhesive anchor for a lightweight construction panel according to the invention comprises a hollow cylindrical anchor body with a closed outer surface. The adhesive anchor further comprises a central bore extending from an upper end face of the anchor body to a lower end face of the anchor body for receiving a screw and for introducing an adhesive.

[0010] The adhesive anchor also has several distribution channels emanating from the central bore for forwarding the introduced adhesive from the central bore as well as several outlet channels adjoining the distribution channels for forwarding the introduced adhesive to the outside of the anchor body.

[0011] The adhesive dowel is made of one piece.

[0012] The one-piece design of the adhesive dowel according to the invention creates an adhesive dowel that is easy to manufacture and can also be easily inserted into a blind hole in a lightweight panel in one step.

[0013] The ability to feed the adhesive through the central hole allows the adhesive to be easily fed to the designated outlets of the adhesive dowel.

[0014] Advantageous embodiments of the invention are the subject of the subclaims.

[0015] According to an advantageous embodiment, the distribution channels are incorporated into a lower end face of the dowel body.

[0016] The introduction of such distribution channels into the lower end face of the dowel body is very easy, for example, by milling.

[0017] According to a further advantageous embodiment variant, at least one recess is made in the outer surface close below the upper end face of the dowel body, into which first outlet channels open.

[0018] The recess in the shell surface allows for the easy supply of adhesive to an area directly below the upper covering layer of the lightweight panel.

[0019] According to an advantageous further development, the recess is designed as a circumferential groove extending parallel to the upper end face of the dowel body, which also allows for extremely simple production.

[0020] According to a further advantageous development, the first outlet channels extend parallel to the central bore through the dowel body and can thus be introduced into the dowel body in a simple manner by drilling into the lower end face.

[0021] According to a further advantageous development, at least one hole is made in the upper end face of the dowel body, which hole extends through the dowel body into the at least one recess in the lateral surface.

[0022] This hole makes it extremely easy to determine whether sufficient adhesive has been applied to the anchor. This can be easily determined by a small amount of adhesive oozing from the hole or holes in the top of the anchor body.

[0023] The holes also advantageously provide ventilation for the adhesive placed in the recess, thus accelerating the curing of the adhesive.

[0024] According to a further advantageous embodiment, the distribution channels extend radially from the central bore.

[0025] According to a further advantageous embodiment variant, second outlet channels adjoin radially outwardly the junction of the first outlet channels into the distribution channels, wherein a passage cross-section of the second outlet channels is smaller than a passage cross-section of the distribution channels.

[0026] The reduction of the passage cross-section of the second outlet channels enables the adhesive introduced through the central bore to easily enter the first outlet channels.

[0027] According to a further advantageous embodiment, chambers are formed in an area of ​​the lateral surface close to the lower end face of the dowel body, into which the second outlet channels open.

[0028] Preferably, the chambers are separated from each other in the circumferential direction of the dowel body by support webs.

[0029] The support webs ensure, on the one hand, stable mechanical support of the dowel body on a covering layer of the lightweight panel close to the lower end face of the dowel body and, on the other hand, a central positioning perpendicular to the lightweight panel.

[0030] In another preferred embodiment, the dowel body is made of a sustainable fiber composite material.

[0031] This has the advantage of sustainable disposal, especially when the lightweight panel is manufactured from a sustainable fiber composite material, since in this case the lightweight panel including the adhesive dowel is made of the same material.

[0032] The use of the fiber composite material has the further advantage that instead of an expensive special adhesive, for example a cost-effective white glue, it can be used to bond the adhesive dowel to the lightweight panel.

[0033] The lightweight construction panel according to the invention with a first cover layer and a second cover layer as well as an inner core connecting the cover layers to one another and at least one adhesive dowel glued to the cover panels for screwing a furniture fitting, which is inserted into a blind hole ending in the second cover layer through the first cover layer and the inner core, has at least one adhesive dowel which is designed in the manner described above.

[0034] In an advantageous embodiment, both the cover layers and the inner core of the lightweight panel are made of a sustainable fiber composite material and, furthermore, at least one adhesive dowel is made of the same fiber composite material as the lightweight panel, which brings with it the advantage mentioned above.

[0035] According to a further embodiment of the lightweight panel according to the invention, the recess in the lateral surface of the dowel body, close to below the upper end face of the dowel body, in the state of the adhesive dowel inserted into the lightweight panel, directly adjoins an inner side of the first cover layer facing the inner core and thus enables a reliable supply of adhesive to the underside of the first cover layer for reliable bonding of the adhesive dowel to the first cover layer.

[0036] In a further preferred embodiment, the chambers in the outer surface of the dowel body, when the adhesive dowel is inserted into the lightweight panel, directly adjoin an inner side of the second cover layer facing the inner core.

[0037] This enables reliable bonding of the adhesive anchor to the second cover layer, since the lower end face of the anchor body rests directly on the slightly milled second cover layer.

[0038] The method according to the invention for mounting an adhesive anchor in a lightweight panel comprises the following process steps: Drilling a blind hole through the first cover layer and the inner core into the inner side of the second cover layer facing the inner core, inserting the adhesive anchor into the blind hole, filling an adhesive into the central bore of the adhesive anchor until the adhesive fills both the chambers in the outer surface of the anchor body and the at least one recess in the outer surface of the anchor body close below the upper end face of the anchor body and allowing the adhesive to harden.

[0039] Preferred embodiments of the invention are explained in more detail below with reference to the accompanying drawings. They show: Figure 1 is a schematic isometric representation of an embodiment variant of an adhesive anchor according to the invention, Figure 2 is a further schematic isometric representation of the Figure 1 shown adhesive anchor from a different perspective, Figure 3 a side view of the Figures 1 and 2 shown adhesive anchor, Figure 4 a plan view of a lower end face of the anchor body, Figure 5 a sectional view along a vertical section plane through the Figures 1 and 2 shown adhesive dowel, Figure 6 a schematic isometric representation of a lightweight panel with adhesive dowel arranged therein, Figure 7 a schematic cross-sectional view through the lightweight panel with adhesive dowel inserted therein, Figure 8 one of the Figure 6corresponding isometric schematic representation of the lightweight panel with the adhesive dowel inserted into it and the screw inserted into the adhesive dowel and Figure 9 one of the Figure 7 corresponding cross-sectional view through the lightweight panel with the screw inserted into the adhesive anchor.

[0040] In the following description of the figures, terms such as top, bottom, left, right, front, rear, etc., refer exclusively to the exemplary representation and position of the adhesive anchor, lightweight panel, anchor body, central bore, distribution channels, outlet channels, and the like chosen in the respective figures. These terms are not to be understood as limiting; i.e., these references may change due to different working positions or the mirror-symmetrical design, etc.

[0041] In the Figures 1 and 2The reference number 1 designates an embodiment of an adhesive anchor according to the invention.

[0042] The adhesive anchor 1 is used to create a screwing point in a lightweight panel 20, as shown for example in Figure 6 is shown.

[0043] As in the Figures 1 and 2 As shown, the adhesive anchor 1 has a hollow cylindrical anchor body 2 with a closed outer surface 12.

[0044] For receiving a fastening element 30, preferably a screw, as shown for example in the Figures 8 and 9 As shown, the adhesive anchor 1 has a central bore 3 extending from an upper end face 5 of the anchor body 2 to a lower end face 4 of the anchor body 2.

[0045] This central hole 3 has, as shown in Figure 5is shown, in the embodiment shown, a screw receptacle 3a extending vertically in a direction z from the upper end face 5 into the dowel body 2 and an adhesive channel 3b adjoining the screw receptacle 3a and reaching as far as the lower end face 4 with a reduced through cross-section compared to a bore cross-section of the screw receptacle 3a.

[0046] The adhesive anchor 1 further comprises several distribution channels 6 extending from the central bore 3 for the forwarding of the introduced adhesive from the central bore 3, as can be seen in the Figures 2 , 4 and 5 is shown.

[0047] These distribution channels 6 are followed by outlet channels 7, 9, which serve to convey the introduced adhesive to the outside of the dowel body 2.

[0048] In contrast to the adhesive dowel known from the prior art, the adhesive dowel 1 is designed as a single piece.

[0049] The distribution channels 6 are, as shown in the Figures 2 , 4 and 5 can be clearly seen, preferably introduced into the lower end face 4 of the dowel body 2, so that bonding of the dowel body 2 to the lightweight panel 20 can already take place in the area of ​​the lower end face 4 of the dowel body 2.

[0050] The distribution channels 6 preferably extend radially from the central bore 3 in the direction of the outer surface 12 of the dowel body 2.

[0051] First outlet channels 7 of the outlet channels 7, 9 extend, as shown in Figure 5 can be clearly seen, parallel on a radially offset pitch circle to the central bore 3 through the dowel body 2.

[0052] The first outlet channels 7 connect the distribution channels 6 in the vertical direction z upwards with a recess 10 in the outer surface 12 of the dowel body 2, which recess is provided close below the upper end face 5 of the dowel body 2 and extends radially inwards in a direction r, ie in the direction of the central bore 3.

[0053] This recess 10 is preferably designed as a U-shaped circumferential groove extending parallel to the upper end face 5 of the dowel body 2.

[0054] The lightweight panel 20 preferably consists of a first cover layer 21 and a second cover layer 22 as well as an inner core 23 connecting the cover layers 21, 22 to one another and at least one adhesive dowel 1 glued to the cover plates 21, 22 for screwing a furniture fitting, which is inserted into a blind hole 24 ending through the first cover layer 21 and the inner core 23 in the second cover layer 22.

[0055] The position of the recess 10 is chosen so that, as shown in the Figures 7 and 9 can be clearly seen, the recess 10 is directly adjacent to the inner side of the first cover layer 21 of the lightweight board 20 facing the inner core 23 of the lightweight board 20, in order to fix the adhesive dowel 1 with the (in the Figures 7 and 9 upper) first cover layer 21.

[0056] The second outlet channels 9 extend, as in Figure 2 , Figure 4 and Figure 5 can be clearly seen, preferably in radial extension of the distribution channels 6 from the mouth of the first outlet channels 7 further radially outwards.

[0057] As in Figure 5 As shown, the passage cross-section of these second outlet channels 9 is smaller than a passage cross-section of the distribution channels 6.

[0058] In the design variant shown here, the vertical depth of the distribution channels 6 is significantly greater than the vertical depth of the second outlet channels 9.

[0059] This means that when the adhesive is injected, a portion of the adhesive quantity pressed through the distribution channels 6 is pressed into the first outlet channels 7 due to the reduced cross-section of the second outlet channels 9 and thus reaches the recess 10. This makes it possible to also supply a sufficient amount of adhesive to the upper cover layer 21, thus ensuring that the adhesive anchor 1 is also bonded to the upper cover layer 21.

[0060] The second outlet channels 9 open, as further into the Figures 2 and 4 is shown, preferably in chambers 8 separated from one another in the circumferential direction by support webs 13, which are formed at the transition between the outer surface 12 of the dowel body 2 and the lower end face 4.

[0061] The chambers 8 in the outer surface 12 of the anchor body 2 border in the state of the adhesive anchor 1 inserted into the lightweight panel 20, as shown in the Figures 7 and 9 is shown, directly to an inner side of the second cover layer 22 facing the inner core 23.

[0062] The adhesive fed into the chambers 8 thus ensures a comprehensive bonding of the adhesive dowel 1 to the lower cover layer 22 and also an exact positioning of the adhesive dowel 1 within the lightweight panel.

[0063] The support webs 13 provide mechanical support for the adhesive anchor 1 on the lower cover layer 22.

[0064] In order to be able to easily recognize that a sufficiently large amount of adhesive has been injected into the adhesive anchor 1, several holes 11 or at least one such hole 11 are made in the anchor body 2 from the upper end face 5 of the anchor body 2.

[0065] The holes 11 end in the recess 10, so that after the introduction of the adhesive when filling the recess 10 with adhesive, from a certain amount of adhesive onwards, a partial amount of adhesive is pressed upwards through the hole 11 or the holes 11 and it can thus be easily recognized that a sufficient amount of adhesive has been filled into the adhesive dowel 1.

[0066] The holes 11 in the upper end face 5 of the dowel body 2 serve the further purpose of venting during the curing of the adhesive.

[0067] For mounting such an adhesive anchor 1 in a lightweight panel 20, the following method steps are preferably carried out: First, a blind hole 24 is drilled through the first cover layer 21 and the inner core 23 into the inner side of the second cover layer 22 facing the inner core 23.

[0068] During drilling, the lower cover layer 22 is slightly milled.

[0069] The adhesive dowel 1 is then inserted into the blind hole 24 in the lightweight panel 20.

[0070] The adhesive is then poured into the central bore 3 of the adhesive anchor 1 until the adhesive fills both the chambers 8 in the outer surface 12 of the anchor body 2 and the at least one recess 10 in the outer surface 12 of the anchor body 2 close below the upper end face 5 of the anchor body 2.

[0071] You can then let the glue harden.

[0072] In a preferred embodiment, the dowel body 2 consists of a sustainable fiber composite material.

[0073] Furthermore, the lightweight panel 20, in particular the cover layers 21 and 22 and the inner core 23 of the lightweight panel 20, preferably also consists of a sustainable fiber composite material.

[0074] In particular, the combination of a lightweight panel 20 and adhesive dowel 1 made of the same fiber composite material enables an improvement in the disposal and processing of the raw materials used, because there is no need to separate the materials.

[0075] The sustainable fiber composite material preferably consists of a biogenic material, preferably predominantly or entirely of a plant material, in particular a pressed fiber material.

[0076] The biogenic material can include, for example, wood components, cores, shells, natural polymers or pressed fiber materials.

[0077] As an adhesive, a cost-effective white glue is used, for example, to bond the adhesive dowel to the lightweight panel, instead of an expensive special adhesive, which is particularly advantageous when using the fiber composite material. List of reference symbols

[0078] 1 Adhesive anchor 2 Anchor body 3 Central bore 3a Screw receptacle 3b Adhesive channel 4 Lower end face 5 Upper end face 6 Distribution channel 7 First outlet channel 8 Chamber 9 Second outlet channel 10 Recess 11 Hole 12 Shell surface 13 Support web 20 Lightweight panel 21 First cover layer 22 Second cover layer 23 Inner core 24 Blind hole 30 Fastening element rDirection zDirection

Claims

1. Adhesive anchor (1) for a lightweight building panel (20), comprising - a hollow cylindrical anchor body (2) with a closed outer surface (12), - a central bore (3) extending from an upper end face (5) of the anchor body (2) to a lower end face (4) of the anchor body (2) for receiving a fastening element (30) and for introducing an adhesive, - a plurality of distribution channels (6) extending from the central bore (3) for conveying the introduced adhesive from the central bore (3), - a plurality of outlet channels (7, 9) adjoining the distribution channels (6) for conveying the introduced adhesive to the outside of the anchor body (2), characterized in that - the adhesive dowel (1) is made in one piece.

2. Adhesive dowel (1) according to claim 1, characterized in that the distribution channels (6) are incorporated into a lower end face (4) of the dowel body (2).

3. Adhesive dowel (1) according to claim 1 or 2, characterized in thatclose to below the upper end face (5) of the dowel body (2) at least one recess (10) is made in the lateral surface (12), into which first outlet channels (7) open.

4. Adhesive anchor according to claim 3, characterized in that the recess (10) is designed as a circumferential groove extending parallel to the upper end face (5) of the dowel body (2).

5. Adhesive dowel (1) according to claim 3 or 4, characterized in that the first outlet channels (7) extend parallel to the central bore (3) through the dowel body (2).

6. Adhesive dowel (1) according to one of claims 3 to 5, characterized in that at least one hole (11) is made in the upper end face (5) of the dowel body (2), which hole extends through the dowel body (2) into the at least one recess (10) in the lateral surface (12).

7. Adhesive dowel (1) according to one of the preceding claims, characterized in that the distribution channels (6) extend radially from the central bore (3).

8. Adhesive dowel (1) according to one of the preceding claims, characterized in that second outlet channels (9) adjoin radially outwardly the junction of the first outlet channels (7) into the distribution channels (6), wherein a passage cross-section of the second outlet channels (9) is smaller than a passage cross-section of the distribution channels (6).

9. Adhesive dowel (1) according to claim 8, characterized in that Chambers (8) are formed on a region of the lateral surface (12) close to the lower end face (4) of the dowel body (2), into which the second outlet channels (9) open.

10. Adhesive dowel (1) according to claim 9, characterized in that the chambers (8) are separated from one another in the circumferential direction of the dowel body (2) by support webs (13).

11. Adhesive dowel (1) according to one of the preceding claims, characterized in that the dowel body (2) consists of a sustainable, biogenic fiber composite material.

12. Adhesive dowel (1) according to one of the preceding claims, characterized in thatthe glue is a white glue.

13. Lightweight panel (20) with a first cover layer (21) and a second cover layer (22) and an inner core (23) connecting the cover layers (21, 22) to one another and at least one adhesive dowel (1) glued to the cover plates (21, 22) for screwing a furniture fitting, which is inserted into a blind hole (24) ending through the first cover layer (21) and the inner core (23) in the second cover layer (22), characterized in that the at least one adhesive dowel (1) is designed according to one of the preceding claims.

14. Lightweight panel (20) according to claim 13, characterized in that the cover layers (21, 22) and the inner core (23) of the lightweight panel (20) consist of a sustainable, biogenic fiber composite material and that the at least one adhesive dowel (1) consists of the same fiber composite material as the lightweight panel (20).

15. Lightweight panel (20) according to claim 13 or 14, characterized in thatthe recess (10) in the outer surface (12) of the dowel body (2) close to below the upper end face (5) of the dowel body (2) in the state of the adhesive dowel (1) inserted into the lightweight panel (20) directly borders on an inner side of the first cover layer (21) facing the inner core (23).

16. Lightweight panel (20) according to one of claims 13 to 15, characterized in that the chambers (8) in the outer surface (12) of the dowel body (2) directly adjoin an inner side of the second cover layer (22) facing the inner core (23) when the adhesive dowel (1) is inserted into the lightweight panel (20).

17. A method for mounting an adhesive dowel (1) in a lightweight building panel (20) according to one of claims 13 to 16, comprising the method steps: - drilling a blind hole (24) through the first cover layer (21) and the inner core (23) into the inner side of the second cover layer (22) facing the inner core (23), - inserting the adhesive dowel (1) from the first cover layer (21) into the blind hole (24), - filling an adhesive into the central bore (3) of the adhesive dowel (1) until the adhesive fills both the chambers (8) in the outer surface (12) of the dowel body (2) and the at least one recess (10) in the outer surface (12) of the dowel body (2) close below the upper end face (5) of the dowel body (2), - allowing the adhesive to harden.