DE102021003062B4 - Anchor nail for fiber wool insulation mats - Google Patents

Abstract

Anchor nail for fiber wool insulation mats, which comprises a nail shaft (2) and a head plate (3) at one end and a tip (1) at the other end of the nail shaft (2), wherein the nail shaft (2) has four anchor wings (4) at a distance from the head plate (3) of at least 3.0 cm, which are aligned and beveled towards the tip (1) and extend in pairs away from the nail shaft (2) in opposite directions, characterized in that in plan view the nail shaft (2) is cross-shaped and the anchor wings (4) appear as cross arms.

Description

Field of the invention

The present invention relates to an anchor nail for fiber wool insulation mats, a kit, the use of the anchor nail and a composite comprising a carrier, a fiber wool insulation mat, an adhesive and the anchor nail.

State of the art

One type of pitched roof insulation is between-rafter insulation, where an insulating mat in the form of a clamping felt is arranged between the rafters of a roof. The clamping felt is cut from a roll to match the spacing of the rafters with an excess required for clamping. The mats thus formed are clamped between the rafters. The clamping felt is usually made of soft mineral wool, preferably glass or rock wool, or another material with the same or similar insulating and clamping effect. The thickness of the clamping felt often corresponds to the height of the rafters, so that the clamping felt used for between-rafter insulation is relatively thick. This means that it can be held between the rafters almost entirely by its tension without the use of fastening devices. However, the problem often arises here that the insulating mat does not hold and falls out of the gap. It is similar with under-rafter insulation, where a support batten is used, which is formed by battens arranged at a distance from one another and attached to the rafters. The insulation mat is inserted into the gaps between the supporting battens. As with insulation between the rafters, the insulation mats can fall out here too. This problem occurs not only when insulating sloping roofs, but also when insulating vertical walls or horizontal ceilings.

Various types of fastening have been proposed to solve this problem. For example, plate dowels are suitable for fastening insulation mats. A second method is adhesive mounting. For this, the adhesive is applied to the entire surface of the support with light pressure, and then the insulation mat is placed on top and pressed down evenly. Other methods include holding elements such as fixing screws, anchoring elements placed on the rafters, for example flexible retaining plates, profile strips with holding elements for the interior insulation and the like.

US 4 512 130 A and WO 2012/053 689 A1 disclose an anchor nail for fiber wool insulation mats comprising a nail shaft and a head plate at one end and a tip at the other end of the nail shaft, the nail shaft having an anchor wing aligned and beveled towards the tip.

Problems to be solved by the invention

The problem of securing insulation mats against falling, slipping or bulging during installation is known in the state of the art. However, all known systems and methods for solving this problem are cumbersome and expensive.

The object of the present invention is therefore to provide a fastening element which fixes an insulation mat to a support in a simple manner. The installation of the insulation mat should thus be faster, easier and safer in order to facilitate the execution of the insulation work and to avoid poor installation of the insulation.

Summary of the invention

The task was accomplished by providing an anchor nail equipped with beveled anchor wings.

The subject of the present invention is an anchor nail for fiber wool insulation mats, which comprises a nail shaft (2) and a head plate (3) at one end and a tip (1) at the other end of the nail shaft (2), wherein the nail shaft (2) has four anchor wings (4) at a distance from the head plate (3) of at least 3.0 cm, which are aligned and beveled towards the tip (1) and extend in pairs away from the nail shaft (2) in opposite directions, characterized in that in plan view the nail shaft (2) is cross-shaped and the anchor wings (4) appear as cross arms.

Further objects of the present invention are a kit containing anchor nails and fiber wool insulation boards according to the invention, the use of the anchor nail according to the invention for fastening a fiber wool insulation mat to a carrier and a composite of a carrier, a fiber wool insulation mat and anchor nails according to the invention, wherein the anchor nails anchor the fiber wool insulation mat and are fastened to the carrier with an adhesive.

Preferred subject matter is defined in the dependent claims.

Advantages of the invention

The anchor nail according to the invention is suitable not only for securing a fiber wool insulation mat in its position against falling down, but also for firmly fixing it in position without damaging the insulation material. Subsequent slipping of the insulation material is no longer possible. The anchor nail according to the invention is therefore a safe and reliable fastening means for fiber wool insulation mats.

The installation of the anchor nail according to the invention is simple and does not require any special tools, so that it can also be carried out by laypeople.

Description of the characters

1A shows the side view of an anchor nail according to the invention with a tip (1), a nail shaft (2), a head plate (3) and anchor wings (4). 1B shows the top view of the 1A shown and cut off immediately below the tip of the anchor nail according to the invention.

Embodiments of the invention

The anchor nail according to the invention has several parts, namely a nail shaft (2) with at least one anchor wing (4), a head plate (3) at one end of the nail shaft and a tip (1) at the end of the nail shaft opposite the head plate (3).

Herein, the tip or the orientation towards the tip is also referred to as "front" and the head plate or the orientation towards the head plate is also referred to as "rear". The nail shank is elongated and the longitudinal direction of the nail shank is the direction from one end of the shank where the head plate is arranged to the other end of the shank where the tip begins. A plan view of the anchor nail according to the invention is obtained by looking in the longitudinal direction. A direction that is perpendicular to the longitudinal direction is referred to as the transverse direction. A side view is obtained by looking in the transverse direction. An element that extends in a direction other than the longitudinal direction in a side view of the anchor nail points away from the nail shank and thus "outwards".

The length of the anchor nail is preferably 4.0 to 12.0 cm, more preferably 5.0 to 8.0 cm.

The parts of the anchor nail can be made of any solid material. Possible materials are metals, such as aluminum, or plastics. To avoid thermal bridges caused by the anchor nail, plastic parts are advantageous over metals.

However, the effect of the anchor nail according to the invention on the insulation is comparatively small due to potential thermal bridge effects, so that corresponding metal is also suitable. Preferably, all parts of the anchor nail are made of plastic, more preferably of the same plastic. Examples of suitable plastics are polyurethanes, polyolefins or polystyrene. To adapt the properties, fillers can be added to the plastic, for example, which can influence the thermal conductivity and other properties.

The parts of the nail shaft can be separately manufactured parts that are connected to each other, for example by gluing. However, the anchor nail is preferably formed in one piece and can be manufactured, for example, by injection molding.

The anchor nail can be solid or foamed. For reasons of thermal insulation, a foamed anchor nail may be preferred. Since a fiber wool insulation mat, for which the anchor nail is intended to be suitable, is relatively soft and light, the forces acting on the anchor nail, namely the force when pressing the insulation mat and the tensile force when holding the insulation mat, are relatively low, so that the requirements for the strength and load-bearing capacity of the anchor nail are not very high. For this reason, an anchor nail can also be made in foamed form without affecting its function.

Nail shaft

The nail shaft is elongated and extends from the head plate to the tip. The term "elongated" here means that the ratio of the length of the nail shaft, i.e. its dimension from the head plate to the tip, to the width of the nail shaft, i.e. the dimension in the transverse direction, is at least 4, preferably at least 8. The length of the anchor shaft can be in the range from 3.0 to 10.0 cm, more preferably 4.5 to 7.0 cm. Preferably, the width of the nail shaft increases towards the head plate. The smaller width of the nail shaft immediately adjacent to the tip makes it easier for the anchor nail to penetrate the material of the insulation mat when the insulation mat is pressed on. The larger width towards the head plate means that the nail shaft represents a wider support leg for the connection to the head plate, which leads to a stronger connection between the nail shaft and the head plate and thus to a more resilient anchor nail. In addition, the soft material of the insulation mat is more compressed in the area of the head plate, so that the anchor wings have a firmer hold.

The shape of the nail shaft in the top view can be any, for example rectangular, square, cross-shaped or star-shaped. A cross shape (cf. 1A and 1B) may be preferred because this shape requires less material and the shaft still has a high mechanical strength, for example against bending, and at the same time represents a broader support leg for the connection to the head plate.

Headstock

The head plate is plate-shaped, i.e. its length and width are large compared to its thickness. The head plate has a nail shaft-side surface and a rear surface. The nail shaft-side surface and the nail shaft are connected to one another or are preferably one piece. The nail shaft-side surface preferably forms a right angle with the longitudinal direction of the nail shaft.

The anchor nail according to the invention can be connected to a support via its head plate. Suitable methods are described below. For all types of connection, it is advantageous if the back has a larger flat surface that is suitable for flat and thus stable connection to the flat surface of a support. Therefore, the diameter of the head plate is preferably at least 3.0 cm, more preferably at least 4.0 cm and even more preferably at least 5.0 cm.

Here, the diameter of the head plate refers to the longest possible distance on the head plate surface in plan view, for example in the case of a square head plate the longest existing diagonal. A head plate surface can be a rectangle or square with side lengths of 2.0 to 8.0 cm. The thickness of the head plate can be in the range of 1.0 to 5.0 mm. The ratio of the length or width of the head plate to its thickness is preferably at least 5, more preferably at least 10. A typical head plate is a rectangle with a length in the range of 4.0 to 8.0 cm, a width of 2.0 to 4.0 cm and a thickness in the range of 1.0 to 3.0 mm, whereby a width to thickness ratio of at least 10 can be preferred. An elongated rectangular shape may be preferred because, on the one hand, it makes it easier to attach it to a support, for example by stapling, and, on the other hand, the anchor nail is given great strength against the gravitational forces acting due to the anchoring of the insulation mats when used in pitched roof insulation by aligning the long side in the direction of the roof's inclination.

Anchor wing

The anchor nail according to the invention has four anchor wings, that is, it has at least four anchor wings.

The anchor wings are arranged on the nail shaft. The nail shaft and the anchor wing consist either of one piece or of several pieces that are connected to each other, for example by gluing.

The anchor wings are plate-shaped, i.e. their length and width are large compared to their thickness. The anchor wings are aligned towards the tip of the anchor nail. Preferably, one side of the surface of each anchor wing is connected to the nail shaft in the longitudinal direction. This means that the plate or wing surface extends in the longitudinal direction of the nail shaft. The anchor wings are bevelled towards the tip of the anchor nail, i.e. towards the front, so that the dimension of the wing decreases in the transverse direction towards the tip. The wing surface preferably represents a triangle. A bevelled quadrilateral is also possible, i.e. a quadrilateral with a bevelled side or a pentagon. Preferably, the triangle is a right-angled triangle and the quadrilateral is a rectangle, with the right angle of the triangle or a right angle of the quadrilateral on the nail shaft in the direction of the head plate, i.e. at the back. The anchor wings extend outwards. The direction of extension preferably points radially away from the nail shaft. The distance of the outermost point of the anchor wing from the nail shaft is the length of the anchor wing. It is preferably at least 0.8 cm, more preferably at least 1.0 cm, even more preferably at least 1.5 cm. The thickness of the anchor wing is preferably 0.8 mm to 3.0 mm. The ratio of the length of the anchor wing to its thickness is preferably at least 5, more preferably at least 8. A preferred anchor wing has a length in the range of 0.8 to 1.5 cm, a thickness of 0.8 mm to 3.0 mm and a ratio of the length to the thickness of at least 5. In a preferred embodiment, the anchor wings are designed such that the wing plane represents a right-angled triangle, the hypotenuse of which represents the beveled side of the anchor nail, one leg of which is connected to the nail shaft and the other leg of which has a length of at least 0.8 cm. It is sufficient if a right angle mentioned here, for example in the right-angled triangle, is approximately right-angled, i.e. in the range of 80° to 100°, preferably 85° to 95°. A typical anchor wing is at least approximately right-angled triangle with a length of the cathetus pointing outwards from the nail shaft in the range of 0.8 cm to 1.5 cm, a thickness of 0.8 mm to 3.0 mm and a ratio of the length to the thickness of at least 5, whereby the right-angled triangle can be isosceles.

In one embodiment, the angle between the side of the triangle adjacent to the nail shaft and the side pointing outwards can be substantially greater than 90°, so that the tip of the triangle points backwards and the anchor wing essentially represents a barb.

The anchor wings are thin and bevelled towards the tip of the anchor nail so that they can easily penetrate the fibre wool insulation mats.

The anchor nail has four anchor wings, which extend in pairs from the nail shaft in opposite directions, so that a cross shape is formed in the top view, whereby in the top view the nail shaft is cross-shaped and the anchor wings appear as cross arms (cf. 1A and 1B) .

The anchor wings are preferably located close to the tip of the anchor nail so that the distance between the anchor wings and the head plate is as large as possible and the anchor wings therefore hold as large a proportion of the insulation mat thickness as possible. The distance is at least 3.0 cm, more preferably at least 5.0 cm.

Regardless of the number of anchor wings on an anchor nail according to the invention, in all embodiments each of the anchor wings preferably has the same distance from the head plate. It is sufficient if the distances are approximately the same, i.e. they differ from each other by no more than 10%.

In a preferred embodiment, the nail shaft has at most one anchor wing on each line in the longitudinal direction. In other words, there is no second anchor wing on a line on which an anchor wing is arranged in the longitudinal direction of the nail shaft. More preferably, in this embodiment, regardless of the number of anchor wings on the nail shaft, each of the anchor wings has at least approximately the same distance from the head plate. This also distinguishes the anchor nail according to the invention of this design from commercially available lightweight panel anchors, which have at least two rows of barbs and thus have the shape of fir trees in side view. A two- or multi-row arrangement of anchor nails would also not be useful in the present invention for the desired function as an anchor nail for soft fiber wool insulation mats. In fact, such an arrangement would even be disadvantageous, since it would reduce the distance between the anchor wings and the head plate and consequently impair the anchoring effect.

Fiber wool insulation mat

The fiber wool insulation mats mentioned here are, on the one hand, so soft that an anchor nail according to the invention can penetrate them when pressed manually by a user, and, on the other hand, so compact that the anchor wings of the anchor nail hold them firmly enough to prevent them from coming off or falling down due to the effect of gravity. Commercially available fiber wool insulation mats meet this requirement. They can be made of any fiber wool, for example mineral wool, such as glass wool and rock wool, or natural wool made from hemp or flax or sheep's wool. The insulation mats are made of a soft nonwoven fabric that is created by bundling the raw material fibers. The mats can be in the form of separate panels or a rolled-up sheet, from which individual panels of a desired length can be cut if necessary. The mat can be a clamping felt. The thickness of the mats is not restricted and can be, for example, from 12 to 30 cm.

carrier

The anchor nail according to the invention is suitable for use in all areas where a fiber wool insulation mat is to be fixed to a support during installation. Examples of supports are roof sheathing in the case of insulation between the rafters, the roof rafters or a film in the case of insulation under the rafters, a ceiling or an interior wall. The material of the support is not restricted and can therefore be wood, concrete, plastic, bricks or plaster. The nature of the support must be such that there are reasonably flat areas to which the head plate of the anchor nail can be attached using an adhesive.

Kit

A fiber wool insulation mat to be assembled can be provided as a kit together with a plurality of anchor nails according to the invention. The properties and the number of anchor nails can be adapted to the requirements with regard to the fiber wool insulation mat in the kit. For example, the mechanical properties of the anchor nails provided in the kit or their number can be adapted depending on the thickness of the fiber wool insulation mat.

Fastening method

The method for attaching fiber wool insulation mats comprises the steps of (a) attaching anchor nails according to the invention to a support and (b) pressing a fiber wool insulation mat onto the anchor nails.

In step (a), the anchor nails are connected to the carrier. An adhesive is used for this purpose. Examples of adhesives are adhesives, adhesive strips, nails, screws, needles and staples. The type of fastening can be selected depending on the carrier material and the nature of the carrier surface. Suitable methods include gluing the head plate to a carrier, for example by means of hot glue, as well as stapling needles or staples or nailing or screwing through the head plate into the carrier. In one embodiment, the head plate of the anchor nail according to the invention can already have short nails, so that no additional adhesive is required to connect the anchor nail to the carrier, but only a hammer as a tool. In another embodiment, an adhesive tape with peel-off strips can be attached to the head plate of the anchor nail according to the invention, so that neither another adhesive nor a tool is required to connect the anchor nail to the carrier. For example, if the carrier is made of wood, the anchor nail can be glued, nailed, stapled or screwed. Preferably, the support is the underside of a roof structure of a building, for example the roof sheathing on the rafters.

In step (b), a fiber wool insulation mat is pressed onto the anchor nails so that the anchor nails penetrate the insulation material. Due to the above-described design of the anchor nail according to the invention with the tip and the thin anchor wings that are beveled towards the tip, the user can press it on manually and without the use of tools. Due to the further design of the anchor nail according to the invention with the anchor wings that point far outwards, the fiber wool insulation mat is anchored to the support after it has been pressed on and is connected sufficiently firmly to prevent the fiber wool insulation mat from falling down or bulging. This anchoring therefore also does not require any tools.

Network

The fastening method produces a composite that includes a carrier, a fiber wool insulation mat, an adhesive and the anchor nails according to the invention. In this composite, the fiber wool insulation mat is connected to the anchor nails by anchoring. The anchor nails are attached to the carrier with an adhesive. The composite according to the invention can be produced in a simple manner using the anchor nails according to the invention.

List of reference symbols

1

Great

2

Nail shaft

3

Headstock

4

Anchor wing

Claims (9)

Anchor nail for fiber wool insulation mats, which comprises a nail shaft (2) and a head plate (3) at one end and a tip (1) at the other end of the nail shaft (2), wherein the nail shaft (2) has four anchor wings (4) at a distance from the head plate (3) of at least 3.0 cm, which are aligned and beveled towards the tip (1) and extend in pairs away from the nail shaft (2) in opposite directions, characterized in that in plan view the nail shaft (2) is cross-shaped and the anchor wings (4) appear as cross arms. Anchor nail after Claim 1 , whereby the length of the anchor nail is 4.0 to 12.0 cm. Anchor nail after Claim 1 or 2 , whereby the nail shaft (2) becomes wider towards the head plate (3). Anchor nail according to one of the preceding claims, wherein the anchor wings (4) are arranged close to the tip (1) of the anchor nail. Anchor nail according to one of the preceding claims, wherein the anchor wings (4) are at most 3.0 mm thick and they extend at least 0.8 cm from the nail shaft (2). Anchor nail according to one of the preceding claims, wherein the surface of each of the anchor wings (4) is at least approximately a right-angled triangle, the hypotenuse of which represents the bevel towards the tip, the anchor wings (4) are at most 3.0 mm thick and they extend at least 0.8 cm away from the nail shaft (2) and the diameter of the head plate (3) is at least one third of the length of the anchor nail. Kit that includes the anchor nails according to one of the Claims 1 until 6 and fiber wool insulation mats. Use of the anchor nail according to one of the Claims 1 until 6 or the kit according to Claim 7 for attaching a fibre wool insulation mat to a support. Composite of a carrier, a fibre wool insulation mat and anchor nails according to one of the Claims 1 until 6 , whereby the anchor nails anchor the fiber wool insulation mat and are attached to the carrier with an adhesive.

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