DE202020003758U1 - Wall mounting for flat objects by means of a magnetic device, especially for the area of removable wall decorations - Google Patents

Abstract

Magnetic fastening system characterized in that a magnetic functional part is fastened to the object to be fastened with an adhesive which exerts an attractive force on a further magnetic functional part as a counterpart, which is attached to a plastic plate or film by means of an adhesive, and the plastic plate / film can be attached to the outer or inner wall of a building or piece of furniture by an adhesive.

Description

The invention relates to a magnetic fastening system, wherein a magnetic strip or a magnetic metal plate (each magnet) is attached to an adhesive surface which has a larger surface than the magnet (magnet holder). The magnetic holder is mounted on a support element e.g. attached to a wall.

Wall mountings based on the magnet principle and workpieces and materials suitable for them are available in various designs and are described in brochures and patents. There are always two holding parts used for the object to be fastened, between which there is a magnetic force.
One of the holding parts is attached to the object, the other to the wall or a piece of furniture by screws, gluing, form-fitting plug-in connections and the like. attached.
The magnetic effect is based on strontium ferrite or neodymium-iron-boron alloys (ferrite or neodymium magnets) in the form of thin disc magnets or adhesive foils containing these alloys. Either 2 magnets are used in each case or a magnet and an opposite pole made of ferromagnetic material, preferably steel.

1. a) Patentanmeldungen/Gebrauchsmuster
   • DE202009009724U1 Darin wird beschrieben, dass zwischen einem Befestigungspunkt einer Wand und einem Magneten ein dünnes Material „klemmend gehalten“ wird, wobei nach einem Unteranspruch der Befestigungspunkt magnetisierbares Material beinhalten kann.
   • DE202014009445U1 Befestigung von Objekten mittels einer Teleskopverstellung aus mehreren durch Gewinde verbundenen Bauteilen, bei dem diese Bauteile durch einen Magneten und ein Verbindungsblech kraftschlüssig gehalten wird.
   • DE102004042526A1 Halterung aus einem an einer Wand anbringbarem Basiselement (10) und einem mit diesem Basiselement schraubenlos zusammenwirkendes Halterungselement, wobei an dem Basiselement gem. einem Unteranspruch ein Magnet angebrachten sein kann welcher mit einem in einer Aufnahme des Halterungselements angebrachten Metallteil zusammenwirkt.
   • DE102008019959A1 Magnethaftende Fläche zur Befestigung von leichten Gegenständen an einer Fläche aus transluzentem Drahtgewebe.
2. b) Werbebroschüren:
   • In Broschüren zu entsprechenden Produkten wird die Befestigung von Bildern und Fotografien mittels Magnetkraft zwischen einem metallischen Untergrund und einem das Bild/ Foto klemmend haltenden Magneten beschrieben.

The closest prior art to the utility model application presented here is described in the following publications:

1. a) Patent applications / utility models
   • DE202009009724U1 It is described therein that a thin material is “clamped” between a fastening point of a wall and a magnet, wherein, according to a dependent claim, the fastening point can contain magnetizable material.
   • DE202014009445U1 Attachment of objects by means of a telescopic adjustment from several components connected by thread, in which these components are held in a force-fit manner by a magnet and a connecting plate.
   • DE102004042526A1 Bracket comprising a base element (10) that can be attached to a wall and a bracket element which cooperates screwlessly with this base element, the base element according to FIG. According to a dependent claim, a magnet can be attached which interacts with a metal part attached in a receptacle of the mounting element.
   • DE102008019959A1 Magnetic surface for attaching light objects to a surface made of translucent wire mesh.
2. b) Advertising brochures:
   • In brochures for corresponding products, the attachment of pictures and photographs by means of magnetic force between a metallic surface and a magnet holding the picture / photo is described.

Insofar as the aforementioned publications and prior uses describe the attachment of the small-area magnets or film strips to the object and to the room wall or to the piece of furniture by gluing, it is necessary there to use an effective adhesive in order to achieve the necessary holding force on vertical or steeply inclined surfaces to ensure where tensile loads, shear loads and "gap loads" occur in combination. Advertising statement for Gauder magnetic strips: "Extremely strong adhesive - ... a long-lasting and firm hold on any surface (is) guaranteed"

Such adhesives have e.g. An adhesive force (measured perpendicular to the bonding surface) of typically more than 100 Newtons per square centimeter and penetrates into porous substrates such as wallpaper or plaster.

• - Kleberrückstände, welche durch Lichteinwirkung Verfärbungen wie Vergilbung hervorrufen.
• - Ablösung von Untergrundmaterial wie etwa Tapeten, Putzablösungen
• - Beeinträchtigung von Farbe und Glanz der Beschichtungen von Möbeln u.ä.

The present invention is based on the problem that the disadvantage of such adhesives and magnetic market products precoated with them is that they leave behind one or more of the following damage when removed:

• - Adhesive residues that cause discoloration such as yellowing when exposed to light.
• - Removal of substrate material such as wallpaper, plaster removal
• - Impairment of the color and gloss of the coatings on furniture, etc.

• Es war daher ein Befestigungssystem und dafür geeignete Materialien zu finden, welche diese Nachteile nicht aufweisen.

Task definition and solution of the task:

• It was therefore necessary to find a fastening system and materials suitable for it that do not have these disadvantages.

• - Eine auf das zu befestigende Objekt durch Verklebung aufzubringende magnetische Folie oder ein Scheibenmagnet
• - Ein Zwischenelement in Form einer dünnen Kunststoff-Platte oder Kunststoff-Folie (im Folgenden nur „Zwischenplatte“ genannt), auf der, auf der Seite des später zu über Magnetkraft zu befestigenden Objektes ebenfalls eine magnetische Folie oder ein Blech aus ferromagnetischem Material (Gegenpol) aufgeklebt wird und auf der (bei der folgenden Montage) zur Wand gerichteten Seite der „Zwischenplatte“ eine Schicht eines Klebers aufgebracht wird.

Je nach Untergrund, z.B. Putz, lackierte Möbeloberflächen, Tapete, kann es erforderlich sein, den Adhäsivstoff zu variieren. So ist es für melaminharzbeschichtete Möbelfronten vorteilhaft, Haftstoffe zu verwenden die im Finat-TM1 Test (Schältest auf Stahl geprüft) Abzugswerte um 10 Newton/25mm Klebkraft oder mehr (Test auf rostfreiem Stahl Abzugswinkel /-geschwindigkeit von 180° bei 300 mm/min) erreichen während für saugende mineralische Untergründe eher Adhäsivstoffe mit Werten von ungefähr 3 Newton/25mm im Finat-TM1 Test vorteilhaft sind.
Dadurch, dass die Klebefläche des Magnetelements größer ist, als die des auf ihr angebrachten, magnetischen Materials, kann der Kleber etwas schwächer gewählt werden.
Dies ermöglicht es, dass der Aufkleber rückstandslos entfernt und so mehrfach repositioniert werden kann.The task could be solved with the presented invention by a combined arrangement of the following components and materials:

• - A magnetic film or a disc magnet to be applied to the object to be attached by gluing
• - An intermediate element in the form of a thin plastic plate or plastic film (im In the following only called "intermediate plate"), on which, on the side of the object to be fastened later using magnetic force, a magnetic foil or a sheet of ferromagnetic material (opposite pole) is also glued and on the side facing the wall (in the following assembly) a layer of an adhesive is applied to the "intermediate plate".

Depending on the substrate, e.g. plaster, painted furniture surfaces, wallpaper, it may be necessary to vary the adhesive. For melamine-resin-coated furniture fronts, it is advantageous to use adhesives which in the Finat-TM1 test (peel test tested on steel) peel values of 10 Newtons / 25 mm adhesive force or more (test on stainless steel peel angle / speed of 180 ° at 300 mm / min) achieve while for absorbent mineral substrates more adhesive materials with values of about 3 Newtons / 25mm in the Finat-TM1 test are more advantageous.
Because the adhesive surface of the magnetic element is larger than that of the magnetic material attached to it, the adhesive can be chosen to be somewhat weaker.
This enables the sticker to be removed without leaving any residue and thus repositioned several times.

This combined arrangement avoids the disadvantages of damage to the wall or the piece of furniture described above (which a screwed or glued magnet would cause), but still exerts sufficient holding force due to the freely selectable surface of the "intermediate plate" (compared to the magnet / magnetic strip) .

This combined arrangement also enables e.g. a picture attached to the wall can be adjusted with millimeter precision at any time.

The fastening system according to the invention can be marketed together in a set with the carrier objects or also isolated.

Embodiments

1. a) Eine weiß beschichtete Möbelbauplatte (nach DIN EN 309) oder eine Wand als beispielhafter Prüfuntergrund wird mit folgenden Schichten des erfindungsgemäßen Magnethaltesystems versehen: Eine Adhäsivstoffschicht wie in den Ansprüchen näher charakterisiert, eine Zwischenfolie, eine Kleberschicht und einer Magnetfolie wie ebenfalls in den Ansprüchen beschrieben.
2. b) Auf der Rückseite einer Grafik (Testobjekt) wird durch Verklebung ebenfalls eine Magnetfolie befestigt.
3. c) Auf der senkrecht positionierten vorbereiteten Möbelbauplatte oder Wand wird die Grafik unter Ausnutzung der magnetischen Anziehungskraft angebracht. Das befestigte Objekt lässt sich nach Lage und Winkel lässt leicht ausrichten oder gegen eine weitere „magnetisch“ vorbereitete Grafik austauschen. Nach entfernen der Zwischenfolie hinterbleibt keine Beschädigung, sehr geringe Kleberreste lassen sich mit Alkohol leicht entfernen.“

The following description of a particularly typical application is intended to explain the fastening system further:

1. a) A white-coated furniture board (according to DIN EN 309) or a wall as an exemplary test substrate is provided with the following layers of the magnetic holding system according to the invention: An adhesive layer as characterized in more detail in the claims, an intermediate film, an adhesive layer and a magnetic film as also described in the claims .
2. b) A magnetic film is also attached to the back of a graphic (test object) by gluing.
3. c) The graphic is attached to the vertically positioned, prepared furniture construction board or wall using the magnetic force of attraction. The attached object can be easily aligned according to position and angle or exchanged for another "magnetically" prepared graphic. After removing the intermediate film, there is no damage, very little adhesive residue can be easily removed with alcohol. "

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 202009009724 U1 [0003]
• DE 202014009445 U1 [0003]
• DE 102004042526 A1 [0003]
• DE 102008019959 A1 [0003]

Claims (7)

Magnetic fastening system, characterized in that a magnetic functional part is fastened to the object to be fastened with an adhesive which exerts an attractive force on another magnetic functional part as a counterpart, which is attached to a plastic plate or film by means of an adhesive, and the plastic plate / film can be attached to the outer or inner wall of a building or piece of furniture by an adhesive. Fastening system according to Claim 1 characterized in that one of the magnetic functional parts is a disk magnet and the counterpart consists of sheet steel. Fastening system according to Claim 1 characterized in that at least one of the magnetic functional parts is a magnetic film with embedded ferrite or neodymium magnetic material. Fastening system according to Claim 1 characterized in that the adhesive for fastening to the wall of the fastening location is a pressure sensitive adhesive with a glass transition temperature of below -10 ° C. Fastening system according to Claim 1 characterized in that the adhesive for fastening to the wall of the fastening location is a pressure-sensitive adhesive which, in the Finat-TM1 test (peel test tested on steel), peel values of 10 Newtons / 25mm adhesive force or more (test on stainless steel peel angle / speed of 180 ° at 300 mm / min) (use with melamine resin-coated furniture fronts). Fastening system according to Claim 1 characterized in that the adhesive for fastening to the wall of the fastening location is a pressure-sensitive adhesive which, in the Finat-TM1 test (peel test tested on steel), peel values of 3 Newtons / 25mm bond strength or more (test on stainless steel peel angle / speed of 180 ° at 300 mm / min) achieved (use on absorbent mineral substrates). Fastening system according to Claim 1 characterized by an area ratio of between 0.35 and 0.75 - between the adhesive surface of the actual magnetic functional element with the intermediate plate / intermediate film on the one hand, and the adhesive surface of this with the fastening wall on the other.