Bonding pin for light building board and light building board

Abstract

The utility model relates to a bonding pin (1) for a light building board (20). The bonding pin (1) comprises a hollow cylindrical pin body (2) with a closed side surface (12); a central bore (3) extending from an upper end face (5) of the pin body (2) to a lower end face (4) of the pin body (2) for receiving a fastening element (30) and introducing an adhesive; a plurality of dispensing channels (6) extending from the central bore (3) for conveying the applied adhesive from the central bore (3); a plurality of outlet channels (7, 9) adjoining the distribution channel (6) for conveying the applied adhesive to the outside of the pin body (2), the adhesive pin (1) being designed in one piece. Due to the one-piece design of the bonding pin, the bonding pin is easy to manufacture and can be easily inserted into a blind hole drill hole of a light building board in a single step.

Description

Technical Field

[0001] The utility model relates to a bonding pin.

[0002] The utility model also relates to a lightweight building board with adhesive pins. Background Art

[0003] Such adhesive dowels are used to form anchoring / screwing points in lightweight construction panels. Such lightweight construction panels essentially consist of two relatively strong outer layers with a softer inner core between them.

[0004] An adhesive pin of the same type is known, for example, from DE 20 2008 013 067 U1.

[0005] A disadvantage of the universal adhesive dowel described therein is the relatively complex structure of the multi-component adhesive dowel, which results in relatively high production costs. Utility Model Content

[0006] The object of the utility model is to develop an adhesive dowel for lightweight building panels, which has a relatively simple structure and can be installed in the lightweight building panels in a simple manner.

[0007] This object is achieved by an adhesive dowel for lightweight building panels according to one aspect of the present invention.

[0008] This object is also achieved by a lightweight building panel according to another aspect of the present invention.

[0009] The adhesive pin for lightweight building panels according to the present invention comprises a hollow cylindrical pin body with a closed side surface and a central hole extending from the upper end surface of the pin body to the lower end surface of the pin body for receiving a screw and applying adhesive.

[0010] The adhesive pin also includes a plurality of dispensing channels extending from the central bore for conveying the applied adhesive from the central bore, and a plurality of outlet channels adjacent the dispensing channels for conveying the applied adhesive to an exterior side of the pin body.

[0011] The bonded pins are designed as one piece.

[0012] The one-piece design of the adhesive dowel according to the invention results in an adhesive dowel that is simple to produce and can also be easily inserted into blind bores of lightweight building panels in a single step.

[0013] The possibility of feeding the adhesive through the central hole makes it easy to feed the adhesive to the intended outlet of the adhesive pin.

[0014] Advantageous embodiments of the invention are further aspects of the invention.

[0015] According to an advantageous embodiment variant, the distribution channel is introduced into the lower end face of the pin body.

[0016] The introduction of such a distribution channel into the lower end face of the pin body can be realized very easily, for example by milling.

[0017] According to yet another advantageous embodiment variant, at least one recess is formed in the side surface of the pin body close to below the upper end face, into which recess the first outlet channel opens.

[0018] The recess in the side surface makes it possible to deliver adhesive in an easy manner into the area directly below the upper covering layer of the lightweight building board.

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

[0020] According to yet another advantageous further development, the first outlet channel extends through the pin body parallel to the central bore and can therefore be introduced into the pin body in a simple manner by drilling a hole in the lower end face.

[0021] According to yet another advantageous further development, at least one hole is formed in the upper end face of the pin body, said at least one hole extending through the pin body into the at least one recess in the side surface.

[0022] The holes make it extremely easy to determine whether enough adhesive has been applied to the pin. This can be easily detected by a small amount of adhesive leaking from the holes or multiple holes on the top side of the pin body.

[0023] The holes also advantageously ventilate the adhesive in the recesses to accelerate curing of the adhesive.

[0024] According to another advantageous embodiment variant, the distribution channel extends radially from the central opening.

[0025] According to a further advantageous embodiment variant, the second outlet channel connects radially outside at the opening of the first outlet channel into the distribution channel, whereby the through-cross section of the second outlet channel is smaller than the through-cross section of the distribution channel.

[0026] Reducing the through-cross section of the second outlet channel allows the adhesive introduced through the central hole to easily enter the first outlet channel.

[0027] According to another advantageous embodiment variant, a cavity is formed at the lower end face of the pin body in a region close to the side surface, the second outlet channel opening into the cavity.

[0028] Preferably, the chambers are separated from one another in the circumferential direction of the pin body by supporting webs.

[0029] The supporting web ensures, on the one hand, a stable mechanical support of the pin body on the covering layer of the lightweight building board near the lower end face of the pin body and, on the other hand, a central and perpendicular positioning to the lightweight building board.

[0030] In another preferred embodiment variant, the pin body consists of a sustainable fiber-reinforced composite material.

[0031] Particularly in the case of lightweight building panels also made from sustainable fiber-reinforced composite materials, this has the advantage of sustainable disposal, since in this case the lightweight building panels and the adhesive dowels consist of the same material.

[0032] Another advantage of using fiber-reinforced composite materials is that instead of expensive specialized adhesives, for example, cheap white glue can be used to bond adhesive dowels to lightweight building panels.

[0033] The lightweight building panel according to the invention comprises a first covering layer, a second covering layer, an inner core connecting the covering layers to one another, and at least one adhesive dowel glued to the covering panel for screwing to furniture fittings, the adhesive dowel being inserted into a blind hole drilled through the first covering layer and the inner core and ending in the second covering layer, the at least one adhesive dowel being an adhesive dowel as described above.

[0034] In an advantageous embodiment variant, both the cover layers and the core of the lightweight building board are made of a sustainable fiber-reinforced composite material, and furthermore, the at least one adhesive dowel is also made of the same fiber-reinforced synthetic material as the lightweight building board, which has the advantages described above.

[0035] According to another embodiment of the lightweight building board according to the present invention, when the adhesive pin is inserted into the lightweight building board, the recessed portion in the side surface of the pin body close to below the upper end surface of the pin body is directly adjacent to the inner side of the first covering layer facing the inner core, and thus adhesive can be reliably provided to the bottom side of the first covering layer to reliably bond the adhesive pin to the first covering layer.

[0036] In a further preferred embodiment variant, in the state of the adhesive dowel inserted into the lightweight building board, the cavity in the side surface of the dowel body directly adjoins the inner side of the second covering layer facing the inner core.

[0037] This enables the adhesive pin to be reliably bonded to the second covering layer, since the lower end face of the pin body is arranged directly on the slightly milled second covering layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

[0039] Figure 1 Schematic isometric view showing an embodiment of an adhesive pin according to the invention,

[0040] Figure 2 Show Figure 1 Another schematic isometric view of the bonding pin shown from a different perspective,

[0041] Figure 3 Show Figure 1 and Figure 2 A side view of the bonding pin is shown,

[0042] Figure 4 A plan view showing the lower end face of the pin body,

[0043] Figure 5 Shown along the Figure 1 and Figure 2 A cross-sectional view of a vertical cutting plane of the bonding pin shown,

[0044] Figure 6 shows a schematic isometric view of a lightweight building panel with adhesive dowels arranged therein,

[0045] Figure 7 shows a schematic cross-sectional view of a lightweight building panel with adhesive dowels inserted therein,

[0046] Figure 8 Shown with Figure 6 a corresponding isometric schematic view of a lightweight building panel into which adhesive dowels are inserted and into which screws are inserted, and

[0047] Figure 9 Shown with Figure 7 Corresponding cross-section through a lightweight building panel with screws inserted into adhesive dowels. DETAILED DESCRIPTION

[0048] In the following description of the figures, terms such as top, bottom, left, right, front, rear, etc. refer exclusively to exemplary representations and positions of adhesive pins, lightweight building panels, pin bodies, central holes, distribution channels, outlet channels, etc., selected in the corresponding figures. These terms should not be understood restrictively, i.e., these references may vary due to different working positions or mirror-symmetrical embodiments, etc.

[0049] exist Figure 1 and Figure 2 1, the reference numeral 1 represents an embodiment of the adhesive pin according to the present invention.

[0050] Adhesive dowels 1 are used to form screw points in lightweight building panels 20, such as Figure 6 As shown in the example.

[0051] like Figure 1 and Figure 2 As shown, the adhesive dowel 1 comprises a hollow cylindrical dowel body 2 with a closed side surface 12 .

[0052] In order to receive a fastening element 30 , preferably a screw, such as e.g. Figure 8 and Figure 9 As shown, the adhesive pin 1 comprises a central hole 3 which extends from an upper end face 5 of the pin body 2 to a lower end face 4 of the pin body 2 .

[0053] like Figure 5 As shown, in the embodiment example shown, the center hole 3 includes a screw receiving portion 3a, which extends vertically from the upper end face 5 into the pin body 2 in the direction z; and a glue channel 3b, which is adjacent to the screw receiving portion 3a and extends to the lower end face 4, and the cross-section of the glue channel is reduced compared to the hole cross-section of the screw receiving portion 3a.

[0054] like Figure 2 、 Figure 4 and Figure 5 As shown, the adhesive pin 1 further comprises a plurality of dispensing channels 6 extending from the central hole 3 for conveying the applied adhesive from the central hole 3 .

[0055] These distribution channels 6 are adjoined by outlet channels 7 , 9 which serve to convey the applied adhesive to the outside of the pin body 2 .

[0056] In contrast to adhesive dowels known from the prior art, adhesive dowel 1 is formed completely in one piece.

[0057] If you can Figure 2 、 Figure 4 and Figure 5 As can be clearly seen in FIG, the distribution channel 6 is preferably introduced into the lower end face 4 of the dowel body 2 , so that bonding of the dowel body 2 to the lightweight building panel 20 can already take place in the region of the lower end face 4 of the dowel body 2 .

[0058] The distribution channel 6 preferably extends radially from the central hole 3 in the direction of the side surface 12 of the pin body 2 .

[0059] If you can Figure 5 It can be clearly seen in FIG that the first of the outlet channels 7 , 9 , 7 , extends through the pin body 2 parallel to the central bore 3 on a radially offset pitch circle.

[0060] The first outlet channel 7 connects the distribution channel 6 upward in the vertical direction z to a recess 10 in the side surface 12 of the pin body 2, which is arranged close to the bottom of the upper end face 5 of the pin body 2 and extends radially inward in the direction r (i.e., in the direction of the central hole 3).

[0061] The recess 10 is preferably formed as a U-shaped circumferential groove extending parallel to the upper end face 5 of the pin body 2 .

[0062] The lightweight building panel 20 preferably consists of a first covering layer 21 and a second covering layer 22 as well as an inner core 23 connecting the covering layers 21 , 22 and at least one adhesive dowel 1 , which is bonded to the covering layers 21 , 22 for screwing to the furniture fitting and is inserted into a blind bore 24 passing through the first covering layer 21 , the inner core 23 and ending in the second covering layer 22 .

[0063] The position of the recess 10 is selected in the following manner: Figure 7 and Figure 9 As can be clearly seen in FIG, the recess 10 is directly adjacent to the inner side of the first cover layer 21 of the lightweight building board 20, which side faces the inner core 23 of the lightweight building board 20, so that the adhesive dowel 1 is bonded to the first cover layer 21 (at Figure 7 and Figure 9 at the top of the ).

[0064] If you can Figure 2 、 Figure 4 and Figure 5 As can be clearly seen in FIG, the second outlet channel 9 preferably extends radially further outwards in the radial extension of the distribution channel 6 from the junction with the first outlet channel 7 .

[0065] like Figure 5 As shown, the through-cross section of these second outlet channels 9 is smaller than the through-cross section of the distribution channel 6 .

[0066] In the embodiment shown here, the vertical depth of the distribution channel 6 is significantly greater than the vertical depth of the second outlet channel 9 .

[0067] This has the following effect: when injecting adhesive, part of the amount of adhesive pressed in through the dispensing channel 6 is pressed into the first outlet channel 7 due to the reduced cross-section of the second outlet channel 9 and thus reaches the recess 10. This makes it possible to guide a sufficient amount of adhesive to the upper cover layer 21 in order to ensure that the adhesive pin 1 also adheres to the upper cover layer 21.

[0068] like Figure 2 and Figure 4 As further shown, the second outlet channel 9 preferably opens into chambers 8 which are separated from one another in the circumferential direction by supporting webs 13 and are formed at the transition between the side surface 12 and the lower end face 4 of the pin body 2 .

[0069] In the state where the adhesive dowel 1 is inserted into the lightweight building board 20, as shown in FIG. Figure 7 and Figure 9As shown, the cavity 8 in the side surface 12 of the pin body 2 directly adjoins the inner side of the second cover layer 22 facing the inner core 23 .

[0070] The adhesive introduced into the cavity 8 thus ensures that the adhesive dowel 1 is bonded to the lower covering layer 22 around its entire circumference and also ensures precise positioning of the adhesive dowel 1 within the lightweight building panel.

[0071] The supporting web 13 provides mechanical support for the adhesive dowel 1 on the lower cover layer 22 .

[0072] In order to be able to easily detect that a sufficiently large amount of adhesive has been injected into the adhesive pin 1 , a plurality of holes 11 or at least one such hole 11 is formed in the pin body 2 from its upper end face 5 .

[0073] The hole 11 ends in the recess 10 so that after the adhesive has been introduced, when the recess 10 is filled with adhesive, a portion of the adhesive is pressed upward through the hole 11 or holes 11, making it easy to identify that a sufficient amount of adhesive has been filled into the adhesive pin 1.

[0074] The holes 11 in the upper end face 5 of the pin body 2 fulfil the further purpose of venting during curing of the adhesive.

[0075] To install such an adhesive dowel 1 in a lightweight building panel 20, the following process steps are preferably performed:

[0076] First, a blind hole 24 is drilled through the first cover layer 21 and the inner core 23 to the inner side of the second cover layer 22 facing the inner core 23 .

[0077] During drilling, the lower cover layer 22 is slightly milled.

[0078] The adhesive dowel 1 is then inserted into the blind bore 24 in the lightweight building panel 20 .

[0079] The adhesive is then filled into the central hole 3 of the adhesive pin 1 until the adhesive fills the cavity 8 in the side surface 12 of the pin body 2 and the at least one recess 10 in the side surface area 12 of the pin body 2 close to below the upper end face 5 of the pin body 2.

[0080] The adhesive can then be allowed to cure.

[0081] In a preferred embodiment, the pin body 2 is constructed from a sustainable fiber-reinforced composite material.

[0082] Furthermore, the lightweight building panel 20 , in particular the cover layers 21 and 22 and the core 23 of the lightweight building panel 20 , preferably also consists of a sustainable fiber-reinforced composite material.

[0083] In particular, the combination of lightweight building panels 20 and adhesive dowels 1 consisting of the same fiber-reinforced composite material makes it possible to improve the handling and processing of the raw materials used, since the materials do not have to be separated.

[0084] Sustainable fiber-reinforced composite materials preferably consist of biomaterials, preferably predominantly or completely of plant-based materials, in particular pressed fiber materials.

[0085] For example, the biomaterial may include wood components, cores, shells, natural polymers or compressed fiber materials.

[0086] Instead of expensive special adhesives, for example, cheap white glue is used to bond adhesive dowels to lightweight building panels, which is particularly advantageous when using fiber-reinforced composite materials.

[0087] Reference Signs List

[0088] 1 adhesive dowel

[0089] 2 pin body

[0090] 3 center holes

[0091] 3a Screw receiving portion

[0092] 3b Adhesive channel

[0093] 4 Lower end surface

[0094] 5 Upper end surface

[0095] 6 distribution channels

[0096] 7First Exit Channel

[0097] 8 chambers

[0098] 9 Second Exit Channel

[0099] 10 recesses

[0100] 11 holes

[0101] 12 Side surface

[0102] 13 Supporting web

[0103] 20 Lightweight building panels

[0104] 21 First covering layer

[0105] 22 Second covering layer

[0106] 23 inner core

[0107] 24 Blind hole drilling

[0108] 30 Fastening elements

[0109] r direction

[0110] z direction.

Claims

1. An adhesive dowel (1) for a lightweight building panel (20), comprising: - a hollow cylindrical pin body (2) with a closed side surface (12), a central hole (3) extending from the upper end face (5) of the pin body (2) to the lower end face (4) of the pin body (2) for receiving a fastening element (30) and introducing an adhesive, - a plurality of dispensing channels (6) extending from the central hole (3) for conveying the applied adhesive from the central hole (3), - a plurality of outlet channels (7, 9) adjoining the dispensing channel (6) for transporting the applied adhesive to the outside of the pin body (2), It is characterized by: The adhesive pin (1) is designed in one piece.

2. The adhesive pin (1) according to claim 1, characterized in that The distribution channel (6) is introduced into the lower end face (4) of the pin body (2).

3. The adhesive pin (1) according to claim 1 or 2, characterized in that At least one recess (10) is provided in the side surface (12) below the upper end surface (5) of the pin body (2), and a first outlet channel (7) opens into the recess.

4. The adhesive pin according to claim 3, characterized in that The recess (10) is formed as a circumferential groove extending parallel to the upper end surface (5) of the pin body (2).

5. The adhesive pin (1) according to claim 3, characterized in that The first outlet channel (7) extends through the pin body (2) parallel to the central hole (3).

6. The adhesive pin (1) according to claim 3, characterized in that At least one hole (11) is formed in the upper end surface (5) of the pin body (2), and the hole extends through the pin body (2) into the at least one recess (10) in the side surface (12).

7. The adhesive pin (1) according to claim 1, characterized in that The distribution channel (6) extends radially from the central hole (3).

8. The adhesive pin (1) according to claim 3, characterized in that A second outlet channel (9) is radially connected to the distribution channel (6) outside the opening of the first outlet channel (7), and the through-section of the second outlet channel (9) is smaller than the through-section of the distribution channel (6).

9. The adhesive dowel (1) according to claim 8, characterized in that A chamber (8) is formed at the lower end surface (4) of the pin body (2) in an area close to the side surface (12), and the second outlet channel (9) leads to the chamber.

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

11. The adhesive dowel (1) according to claim 1, characterized in that The pin body (2) is made of a sustainable biofiber reinforced composite material.

12. The adhesive dowel (1) according to claim 1, characterized in that The adhesive is white glue.

13. A lightweight building panel (20) comprising a first covering layer (21) and a second covering layer (22), an inner core (23) connecting the first covering layer (21) and the second covering layer (22) to one another, and at least one adhesive dowel (1) glued to the covering layers (21, 22) for screwing furniture fittings to the covering layers (21, 22), the adhesive dowel being inserted into a blind bore (24) passing through the first covering layer (21) and the inner core (23) and ending in the second covering layer (22), characterized in that The at least one adhesive dowel (1) is an adhesive dowel according to claim 1.

14. The lightweight building board (20) according to claim 13, characterized in that The first covering layer (21) and the second covering layer (22) and the inner core (23) of the lightweight building panel (20) are composed of a sustainable biofiber-reinforced composite material, and the at least one adhesive dowel (1) is composed of the same fiber-reinforced composite material as the lightweight building panel (20).

15. The lightweight building board (20) according to claim 13 or 14, characterized in that When the adhesive pin (1) is inserted into the lightweight building board (20), the recess (10) provided in the side surface (12) of the pin body (2) below the upper end surface (5) of the pin body (2) is directly adjacent to the inner side of the first covering layer (21) facing the inner core (23).

16. The lightweight building board (20) according to claim 13, characterized in that In the state where the adhesive dowel (1) is inserted into the lightweight building panel (20), the cavity (8) in the side surface (12) of the dowel body (2) is directly adjacent to the inner side of the second covering layer (22) facing the inner core (23).

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