ADHESIVE DOWEL FOR A LIGHTWEIGHT PANEL, LIGHTWEIGHT PANEL AND METHOD FOR MOUNTING AN ADHESIVE DOWEL INTO A LIGHTWEIGHT PANEL

Description

[0001] The present invention relates to an adhesive dowel 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] These adhesive anchors are used to create a fixed / screw point in a lightweight panel. Such lightweight panels essentially consist of two relatively rigid outer layers and a softer inner core in between.

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

[0005] A disadvantage of the generic adhesive dowel is the relatively complicated structure of the multi-part adhesive dowel described therein, 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 its construction and can be easily mounted into a lightweight panel.

[0007] The stated tasks are solved by an adhesive dowel for a lightweight panel with the features of claim 1.

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

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

[0010] The adhesive dowel also has several distribution channels extending from the central bore to convey the adhesive applied from the central bore, as well as several outlet channels adjoining the distribution channels to convey the adhesive applied to the outside of the dowel body.

[0011] The adhesive dowel is formed in one piece.

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

[0013] The option of supplying the adhesive through the central bore allows for easy application of the adhesive to the designated outlets of the adhesive dowel.

[0014] Advantageous embodiments of the invention are the subject of the dependent claims.

[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 made very easy, for example by milling.

[0017] According to another advantageous embodiment, at least one recess is provided in the outer surface near below the upper end face of the dowel body, into which first exit channels open.

[0018] The recess in the surface of the casing allows for the easy application of adhesive to an area directly below the top 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 manufacturing.

[0020] According to a further advantageous embodiment, the first exit channels extend parallel to the central bore through the dowel body and can thus be easily introduced into the dowel body by drilling into the lower end face.

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

[0022] This hole makes it extremely easy to determine whether enough adhesive has been applied to the dowel. This can be easily seen by observing whether a small amount of adhesive oozes out of the hole or holes on the top of the dowel body.

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

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

[0025] According to another advantageous embodiment, second outlet channels are radially connected to the outside of the opening of the first outlet channels into the distribution channels, wherein the cross-sectional area of ​​the second outlet channels is smaller than the cross-sectional area of ​​the distribution channels.

[0026] Reducing the cross-sectional area of ​​the second exit channels allows adhesive introduced through the central bore to easily enter the first exit channels.

[0027] According to another advantageous embodiment, chambers are formed in a region of the outer surface near the lower end face of the dowel body, into which the second exit 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 ribs ensure, firstly, stable mechanical support of the dowel body on a cover layer of the lightweight panel near the lower end face of the dowel body, and secondly, positioning centrally and perpendicular to the lightweight panel.

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

[0031] This has the advantage of sustainable disposal, especially when manufacturing the lightweight panel from a sustainable fiber composite material, since in this case the lightweight panel including the adhesive dowel consists 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 can be used to bond the adhesive dowel to the lightweight panel.

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

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

[0035] According to a further embodiment of the lightweight panel according to the invention, the recess in the outer surface of the dowel body borders directly on an inner surface of the first cover layer facing the inner core when the adhesive dowel is inserted into the lightweight panel, close to the upper end face of the dowel body, thus enabling 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 another preferred embodiment, the chambers in the outer surface of the dowel body, when the adhesive dowel is inserted into the lightweight panel, are directly adjacent to an inner surface of the second cover layer facing the inner core.

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

[0038] The inventive method for mounting an adhesive dowel 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 surface of the second cover layer facing the inner core, inserting the adhesive dowel into the blind hole, filling the central bore of the adhesive dowel with adhesive until the adhesive fills both the chambers in the outer surface of the dowel body and at least one recess in the outer surface of the dowel body close to the upper end face of the dowel 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. These show: Figure 1 is a schematic isometric representation of an embodiment of an adhesive dowel according to the invention, Figure 2 is a further schematic isometric representation of the in Figure 1 shown adhesive dowel from a different perspective, Figure 3 a side view of the one in the Figure 1 and 2 shown adhesive dowel, Figure 4 a top view of a lower end face of the dowel body, Figure 5 a sectional view along a vertical section plane through the Figure 1 and 2 shown adhesive dowel, Figure 6 a schematic isometric representation of a lightweight panel with an adhesive dowel arranged therein, Figure 7 a schematic cross-sectional view through the lightweight panel with the adhesive dowel inserted therein, Figure 8 one of the Figure 6corresponding isometric schematic representation of the lightweight panel with adhesive dowel inserted therein and 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 dowel.

[0040] In the following figure descriptions, terms such as top, bottom, left, right, front, back, etc., refer exclusively to the exemplary representation and position of the adhesive anchor, lightweight panel, anchor body, central bore, distribution channels, exit channels, and the like as chosen in the respective figures. These terms are not to be understood as restrictive; that is, these references may change due to different working positions, mirror-symmetrical design, or similar factors.

[0041] In the Figure 1 and 2Reference numeral 1 denotes a total embodiment of an adhesive dowel according to the invention.

[0042] The adhesive dowel 1 serves to create a screw-in point in a lightweight panel 20, as exemplified in Figure 6 is shown.

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

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

[0045] This central borehole 3 shows, as in Figure 5In the illustrated embodiment, 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 extending to 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 dowel 1 further has several distribution channels 6 extending from the central bore 3 for conveying the adhesive applied from the central bore 3, as can be clearly seen in the Figures 2 , 4 and 5 is shown.

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

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

[0049] The distribution channels 6 are, as in the Figures 2 , 4 and 5 which can be clearly seen, is preferably inserted into the lower end face 4 of the dowel body 2, so that bonding of the dowel body 2 with 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] The first exit channels 7 of the exit channels 7, 9 extend as shown in Figure 5 It can be clearly seen that the dowel body 2 runs parallel to the central bore 3 on a radially offset partial circle.

[0052] The first exit channels 7 connect the distribution channels 6 in a vertical direction z upwards with a recess 10 in the outer surface 12 of the dowel body 2, provided close below the upper end face 5 of the dowel body 2 and extending radially in a direction r inwards, i.e. 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 together and at least one adhesive dowel 1 glued to the cover layers 21, 22 for screwing a furniture fitting to the cover layers 21, 22, which is inserted in a blind hole 24 ending in the second cover layer 22 through the first cover layer 21 and the inner core 23.

[0055] The position of the recess 10 is chosen such that, as in the Figure 7 and 9 It can be clearly seen that the recess 10 is directly adjacent to the inner side of the first cover layer 21 of the lightweight panel 20, which faces the inner core 23 of the lightweight panel 20, in order to align the adhesive dowel 1 with the (in the Figure 7 and 9 to bond the upper) first cover layer 21.

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

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

[0058] In the embodiment 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 causes a portion of the adhesive injected through the distribution channels 6 to be forced into the first outlet channels 7 due to the reduced cross-section of the second outlet channels 9, thus reaching the recess 10. This ensures that a sufficient quantity of adhesive is also delivered to the upper cover layer 21 to guarantee bonding of the adhesive dowel 1 to the upper cover layer 21.

[0060] The second exit channels 9 lead, as further on, into the Figures 2 and 4 is shown, preferably in chambers 8 separated from each other 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 surface 4.

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

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

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

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

[0065] The holes 11 end in the recess 10, so that after the adhesive is applied, when filling the recess 10 with adhesive, a portion of the adhesive is forced upwards through the hole 11(s) when a certain amount of adhesive is used, making it easy to see that a sufficient amount of adhesive has been poured into the adhesive dowel 1.

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

[0067] To mount such an adhesive dowel 1 in a lightweight panel 20, the following process steps are preferably carried out: First, a blind hole 24 is drilled through the first cover layer 21 and the inner core 23 to the inside of the second cover layer 22 facing the inner core 23.

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

[0069] Then the adhesive dowel 1 is 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 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 near below the upper end face 5 of the dowel body 2.

[0071] Then you can let the adhesive 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 made of the same fiber composite material and adhesive dowel 1 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, for example, include wood components, kernels, shells, natural polymers, or pressed fiber materials.

[0077] Instead of an expensive special adhesive, a cost-effective white glue is used to bond the adhesive dowel to the lightweight panel, which is particularly advantageous when using fiber composite material. Reference symbol list

[0078] 1 Adhesive dowel 2 Dowel body 3 Central bore 3a Screw receptacle 3b Adhesive channel 4 Lower end face 5 Upper end face 6 Distribution channel 7 First exit channel 8 Chamber 9 Second exit channel 10 Recess 11 Hole 12 Sheath surface 13 Support web 20 Lightweight panel 21 First cover layer 22 Second cover layer 23 Inner core 24 Blind hole 30 Fastener r Direction z Direction

Claims

1. Adhesive dowel (1) for a lightweight building board (20), comprising - a hollow cylindrical dowel body (2) with a closed surface area (12), - a central bore (3) extending from an upper front face (5) of the dowel body (2) to a lower front face (4) of the dowel body (2) for the reception of a fastening element (30) and for the introduction of an adhesive, - several distribution channels (6) extending from the central bore (3) for forwarding the applied adhesive from the central bore (3), - several outlet channels (7, 9) adjoining the distribution channels (6) for forwarding the adhesive applied to the outside of the dowel body (2), characterized in that - the adhesive dowel (1) is formed in one piece.

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

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

4. Adhesive dowel according to claim 3, characterized in that the recess (10) is formed as a circumferential groove extending parallel to the upper front 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 front 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 area (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) connect radially on the outside to the opening of the first outlet channels (7) into the distribution channels (6), a through-section of the second outlet channels (9) being smaller than a through-section of the distribution channels (6).

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

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 fibre reinforced composite material.

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

13. Lightweight building board (20) with 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 layers (21, 22) for screwing a furniture fitting to the cover layers (21, 22), which is inserted in a blind hole drilling (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 formed according to one of the preceding claims.

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

15. Lightweight building board (20) according to claim 13 or 14, characterized in that the recess (10) in the lateral surface area (12) of the dowel body (2) close below the upper front face (5) of the dowel body (2) is directly adjacent to an inner side of the first cover layer (21) facing the inner core (23) when the adhesive dowel (1) is inserted in the lightweight building board (20).

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

17. Method for mounting an adhesive dowel (1) into a lightweight building board (20) according to one of claims 13 to 16, with the method steps: - Drilling a blind hole (24) through the first cover layer (21) and the inner core (23) up to the inner side of the second cover layer (22) facing towards toe 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 the chambers (8) in the lateral surface area (12) of the dowel body (2) as well as the at least one recess (10) in the lateral surface area (12) of the dowel body (2) close below the upper front face (5) of the dowel body (2), - Letting the adhesive harden.