AT507449A2 - DÄMMSTOFFBEFESTIGER - Google Patents

Description

Description Insulation fastener

The invention relates to a Dämmstoffbefestiger with the features of the preamble of claim 1.

For attachment of insulation boards to substrates such as walls, ceilings and the like. Insulating fasteners are often used instead of or in addition to a bond. In this context, the term "insulation board" not only an intrinsically solid plate, for example, polystyrene, meant, but it is also less solid material, for example, mineral wool, meant, which actually does not act as a plate before the introduction, but as a role may be present. As Dämmstoffbefestiger dowels are very often used as anchors, which have an elongated shaft with a retaining plate and a spreader or a spreading screw for spreading the anchor. To attach an insulation board to a substrate, a hole is created through the insulation board in the underground. The Dämmstoffbefestiger is inserted through the insulation plate into the well, until the holding plate rests on the side facing away from the substrate side of the insulation board. Then the anchor is braced and thus secured the insulation board. The document EP 1 767 794 B1 shows an example of such an insulating anchor. Instead of a dowel with expansion screw, the anchor can also be designed as a screw, nail, screw nail, plug, chemical anchor or the like.

However, such insulation dowels have the disadvantage that they require a lot of space. On the other hand, different insulation dowels with correspondingly long shafts must be provided for different insulation board thicknesses. Space requirements and variant diversity cause high logistical efforts. The document EP 1 691 086 A1 therefore proposes an insulating fastener which spreads in the insulating panel. Instead of a retaining plate, the Dämmstoffbefestiger on several holding webs which are pivotally mounted at the rear end of the spreader and before setting substantially parallel to the longitudinal axis ······················································································. English:. In this context, the term "front" in the direction of introduction of Dämmstoffbefestigers meant front and with "rear" the opposite end. The holding webs each have at their front ends cutting. By introducing these cutting edges in the Dämmstoffptatte the holding webs are to be deflected to the outside 5 and thereby expand. Also, the document proposes that arranged on a dowel shaft obliquely to the longitudinal axis sliding surfaces guide the holding webs outward as soon as the spreader is introduced with the retaining webs in the dowel. Through the use of retaining webs that can rest against the insulator fastener prior to insertion, this has a significantly lower storage space than insulation fastener with retaining plate. In addition, a length of Dämmstoffbefestigers can be used for a variety of insulation board thicknesses, since the insulation boards are not kept outside but in their interior. However, the correct spreading of the retaining webs depends very much on the respective Dämmstoffplattenmaterial. With very soft material, it can occur that the retaining webs do not grip and therefore do not spread completely. With harder material, in turn, there is the risk that the holding webs spread over or the spreader can not be easily inserted into the dowel.

The object of the invention is therefore to provide a Dämmstoffbefestiger, which has little space and can be used for a wide variety of insulation board thickness, but also ensures a secure spreading in the insulation material.

This object is achieved by the features of claim 1. The Dämmstoffbefestiger invention has an anchor and a holding device 25 for holding an insulating plate, wherein the holding device comprises a plurality of holding webs instead of a retaining plate. In contrast to the known Dämmstoffbefestiger the holding webs are designed as toggle. The holding webs can therefore buckle specifically between two pivoting shoulders. In this case, the head of a spreading element, a dowel shaft, the ground or other elements serve as an abutment for the 30 pivot bearings. It is crucial that the anchoring leads to an approximation of the two pivot bearings, so that there is a forced spreading of the holding webs, so that the holding webs hold in a spread state holding plate-like. As a result, the spreading of the retaining webs is at least largely independent of the insulating material. In addition, the holding device is designed such that the 35 holding webs buckle in the insulating material, so that the holding webs sunk in the spread state in the insulating material and are spaced from the outside. ·· ♦ ·· ♦ • · ··· # · · · 4 • · · · · ·

According to the invention, the entire Dämmstoffbefestiger is thus essentially retractable in the insulating material. Essentially means that the essential components of the Dämmstoffbefestigers, in particular the holding webs, are sunk in the insulating material, wherein in the spread state, for example, a Setziefenmarkierung 5 may still be visible. By such a mounting arrangement of insulation board and Dämmstoffbefestiger Wärmeveriuste be avoided, which can be caused by a penetration of the insulation board by the Dämmstoffbefestiger. In addition, the fully recessed Dämmstoffbefestiger does not interfere with supernatant plates or the like when plastering the insulation board. The holding device 10 may also be designed in such a way that the holding webs in the spread state are sufficiently far away from the voltage applied to the ground inside of the insulation board. As a result, it is prevented that the insulating material does not break due to its relatively small material thickness in the area between the holding device and substrate there even at low tensile load and the insulation holder 15 ausknüpft from the insulation material.

Preferably, the holding webs on the front and / or rear on a common sleeve-like abutment. In addition to a simple construction, a uniform spreading of the holding webs can be ensured better than individual abutments.

In a preferred embodiment, the holding webs are connected to the head of a nail or a screw. In this case, the nail or the screw can be the expansion element of a dowel, that is part of the anchor, or alone form the anchor, 25 when the ground is, for example, made of wood. Through the connection with the nail or the screw, the holding webs during transport or the like. Not lost but remain firmly associated with the screw or the nail. The connection can be tension and rotation resistant. However, in particular with a screw, it is advisable that the connection is only tensile and the holding webs are rotatably mounted relative to the screw 30. As a result, the retaining webs do not need to rotate in the insulation board when introducing the Dämmstoffbefestigers.

If a dowel forms the anchor, it is preferably connected to the retaining webs. In particular, an integral connection, for example as a plastic injection molded part, is recommended. For the dowel again different forms come into question, for example, expansion dowel with expansion element, plug-in dowels, chemical dowels with a correspondingly diverse setting method. By connecting dowels and retaining bars a transportable, solid unit is formed. In particular, the one-piece production allows a low-cost production without additional assembly costs.

In order to be able to hold in particular soft insulating materials safely, it is important to span the largest possible area with the retaining webs. In this case, on the one hand, the area spanned by the spread holding webs, that is, for example, a hexagon, is important. On the other hand, however, the surface of the individual retaining webs itself is important. The decisive factor is the area projected in the direction of the ground. If this is too low, the holding webs could inadvertently cut through the insulating material with this surface. Preferably, therefore, the holding webs at least partially on a concave outer surface. The outer surface is in the non-set state of the Dämmstoffbefestigers radially outwardly facing surface. Concave outer surfaces cause that the cross-sectional area of the holding webs may be small, whereby the Dämmstoffbefestiger can be made slim and easily in an insulating board can be introduced. Nevertheless, however, a large projected area in the spread state and a good rigidity of the holding webs can be achieved with low material usage.

The holding webs can be bent according to the invention purely arcuate outward. Such a bulge should be taken under the term "toggle". However, the holding webs preferably have a predetermined break point, which divides the respective holding web into two subsections. Compared with an arcuate buckling without a predetermined break point, the forces necessary for bracing can be significantly reduced as a result. Without departing from the spirit of the invention, several break points per holding web can be provided. Also, regardless of how clearly a break point is pronounced, the sections can also be respectively beyond this, comparable to the pursuit of an umbrella.

In a preferred embodiment, the insulation holder holding webs with a break point and two sections, wherein the front portion is shorter than the rear portion. Preferably, it has about 70 to 90 percent of the length of the rear section. The insulation holder can be designed in such a way that the front sections are pivoted during setting so far that they in ♦······················································································ The vertical sections are approximately perpendicular to the longitudinal axis, while the rear sections are supporting struts at an angle of approximately 45 to 60 degrees protrude. This results in a particularly stable construction. 5 The invention is illustrated below with reference to two embodiments.

Show it:

Figure 1 shows a first embodiment in longitudinal section in the ready 10 state;

Figure 2 shows a cross section of the first embodiment according to arrow II of Figure 2; and FIG. 3 is a perspective view of a second embodiment according to the invention

Sectional view in the installed state.

Figures 1 and 2 show a Dämmstoffbefestiger 1 according to the invention based on a screw as anchor 2. The anchor 2 has a front end 3 with a wood screw thread 4 on. To the wood screw thread 4 is followed by a cylindrical, unthreaded shaft 5 axially with approximately the same length. The front end 3 opposite to the shaft 5 at the rear end 6 is followed by a cylindrical head 7 with a tool holder 8 in the form of a hexagon socket. Around the shaft 5 of the armature 2 around a holding device 9 is arranged. This consists of a 25 sleeve-like compression bearing 10, which is supported on the front side of the head 7 and corresponds in outer diameter to the outer diameter of the head 7. On its inside, the compression bearing 10 has a circumferential groove 11 into which engages a bead 12 of the armature 2 arranged in the corresponding region of the shaft 5. As a result, the holding device 9 is axially fixed to the armature 2. In the axial direction, 30 are integrally connected to the compression bearing 10 a plurality of retaining webs 13 at. In the illustrated ready-to-use, still uninstalled state of Dämmstoffbefestigers 1, the holding webs 13 extend axially, ie parallel to the shaft 5. They each consist of a rear portion 14, which faces the head 7, and a front portion 15, which faces the wood screw thread 4 is. At the transition from the rear 35 section 14 to the front section 15, the holding webs 13 a break point 16 in the form of a narrow connection. Otherwise, the cross section of the · · · · · · • • • • • • • t t · · · · · · · · · · · · · «« «·. ··· ·· ··· ·· · * t ·· -6-

Holding webs 13 over the length of the holding webs 13 substantially constant. Figure 2 shows this cross section of the holding webs 13. The holding webs 13 each have a base body 17 which has the shape of a quarter-circle in cross-section and facing the armature 2 with its inside. The four main body 17 of the four 5 holding webs 13 are arranged together around the armature 2 and form an almost closed ring, which is divided only by narrow slots 18 in the individual segments. Towards the slots 18, the retaining webs 13 have radially outwardly directed ribs 19 at their respective ends. Due to the ribs 19, the outer surface 20 of the holding webs 13 may be referred to as at least partially concave. 10 The front sections 15 are connected in one piece to a common sleeve-like abutment 21 in the direction of the wood screw thread 4.

To mount the Dämmstoffbefestigers 1 shown, first, not shown insulation board is placed on a substrate 15, also not shown, and introduced a cylindrical bore through the insulation board through to the ground. The Dämmstoffbefestiger 1 is particularly suitable for a background made of wood. Subsequently, the Dämmstoffbefestiger 1 is inserted into the borehole, with the ribs 19 of the retaining webs 13 already buried in the insulating material and this is also urged radially outward in the region of the holding device 9. Thereafter, the armature 2 is screwed rotating into the ground. The borehole is designed with respect to its diameter corresponding to the wood screw thread 4, so that it comes in the course of Eintreibvorgangs to create the abutment 21 on the ground. Since the head 7 moves further in the direction of the ground, the holding device 9 is compressed axially. This is done by radial buckling of the two sections 14, 15, whereby kinking takes place at the break point 16 and at the transitions of the sections 14, 15 on the abutment 21 as well as on the compression bearing 10. This results in that the holding webs 13 act as a toggle lever 22. The radial buckling, which can also be referred to as spreading, causes a displacement or compression of the insulating material in this area. Due to the concave outer surface 20, the holding webs 13 have a high stability and at the same time displace the insulating material over a large area. The armature 2 is driven so far into the ground until its rear end is sunk with the tool holder 8 substantially completely in the insulating material. The setting process can be stopped, for example, by a stop of the rotary tool on the outside of the insulation board. The front part section 15 then extends approximately radially or slightly inclined backwards and thus acts as a holding surface similar to the one that ······· ··········································································.

Holding plate known insulation dowel. The rear sections 14 act as support struts for the front sections 15. Since the length of the front section 15 is approximately 0.7 times the rear section 14, the rear sections 14 are inclined from the compression bearing 10 at an angle of approximately five 30 ° to the longitudinal axis of the Dämmstoffbefestigers 1 from.

Due to the described forced spreading of the holding device 9 a secure spreading in the insulating material is ensured. At the same time the Dämmstoffbefestiger 1 is slim in the illustrated ready-to-use state, so that there is only a small footprint for storage of a variety 10 such Dämmstoffbefestiger 1.

Figure 3 shows a similar Dämmstoffbefestiger 1a in already set state. It is also an insulation panel 23 shown, which is placed on a substrate 24 made of concrete and secured to the Dämmstoffbefestiger 1 a. To avoid 15 repetitions, only the distinction to the first exemplary embodiment will be discussed below. The same reference numbers are otherwise used for the same components. An essential difference from the first exemplary embodiment is that the armature 2 a is designed as an expansion dowel. Integral to this armature 2a is the holding device 9a with an upsetting bearing 2010 and a center bearing 21, between which the holding webs 13a are arranged. in the

Contrary to the first embodiment, the holding device 9a a total of eight retaining webs 13a, of which, however, only half is shown due to the insulation board 23. The holding webs 13a also have only a rectangular cross-section. In turn, a head 7 adjoins the compression bearing 10, but this 25 belongs to an expansion screw 25, which passes through the armature 2 a axially. It serves to spread the armature 2a, ie the expansion anchor, and the axial compression of the holding device 9a.

To set the Dämmstoffbefestigers 1a, first the insulating plate 23 is placed on the substrate 30, then a cylindrical hole 26 through the insulation board 23 passes into the ground 24 and further inserted the Dämmstoffbefestiger 1a so far into the hole 26 until a slide 27th in the form of a short circumferential average extension between anchor 2a and abutment 21 is seated on the substrate 24. In the illustrated fastening example, the compression bearing 10 still looks out of the insulation panel 23 in this state, but this is not the case with thicker insulation panels. For the actual anchorage and ♦ · · · · · · · · · · · · · · · · · · · · · · • • • · · · · · · · ································

Verspreizung the holding device 9a, the expansion screw 25 is screwed. It spreads the armature 2a and thereby ensures a support in the ground 24. By pressing the head 7 on the rear end of the compression bearing 10, it comes as described above for spreading the retaining webs 13a. The Dämmstoffbefestiger 1a is sunk completely in the expanded 5 state in the insulation board 23. This means that the rear end in the insertion direction of the Dämmstoffbefestigers 1a does not protrude from the insulation board. In addition, the Dämmstoffbefestiger 1a is designed such that the front portion 15 of the holding web 13a is spaced in the spread state of the substrate 24. The distance is several centimeters, whereby 10 is achieved that the insulation board unties only at a sufficiently high tensile load. Retaining device 9a and anchor 2a would not have to be formed in one piece for the function, but results from the illustrated one-piece a particularly simple, inexpensive herzusteilender structure. 15 5 List of approvals Insulation fastener 1,1a Insulation fastener 2,2a Anchor 10 3 Front end 4 Wood screw thread 5 Shaft 6 Rear end 7 Head 15 8 Tool holder 9,9a Holding device 10 Compression bearing 11 Groove 12 Bead 20 13,13a Holding web 14 Rear section 15 Front section 16 Break point 17 Base 25 18 Slot 19 Rib 20 Outer surface 21 Abutment 22 Knee lever 30 23 Insulation plate 24 Underground 25 Expansion screw 26 Drill hole 27 Insertion protection 35

Claims (2)

Dämmstoffbefestiger (1) with an anchor (2, 2a) for anchoring in a substrate (24), and with a holding device (9, 9a) for holding an insulating plate (23), wherein the holding means (9, 9a) instead of a retaining plate a plurality of retaining webs (13, 13a), and wherein the Dämmstoffbefestiger (1) in the insulation board substantially (23) is completely retractable, characterized in that the holding webs (13, 13a) as a toggle (22) are executed. Dämmstoffbefestiger according to claim 1, characterized in that the holding webs (13, 13a) front a common sleeve-like abutment (21). Dämmstoffbefestiger according to claim 1 or 2, characterized in that the holding webs (13, 13a) behind a common sleeve-like compression bearing (10). Dämmstoffbefestiger according to any one of the preceding claims, characterized in that the holding webs (13) are connected to the head of a nail or a screw (2). Dämmstoffbefestiger according to any one of the preceding claims, characterized in that the holding webs (13a) with a dowel (2a), in particular in one piece, is connected. Dämmstoffbefestiger according to any one of the preceding claims, characterized in that the holding webs (13) at least partially a concave outer surface (20) aulweisen. · · · · · · · • · • · · · • · · · · • · · · · · · · · · · · · · · • · • · • · »· ·· -10 7. Dämmstoffbefestiger according to any one of the preceding claims, characterized in that the Haitestege (13, 13a) aulweisen a predetermined break point (16) which divides the holding web into two sections (14, 15). 5. 8. Dämmstoffbefestiger according to claim 1, characterized in that the front portion (15) has approximately the 0.7 to 0.9 times the length of the rear portion (14). PUCHEN A-1010 Wj phone 7NER aces 13 37 09 Oct 20, 2009 t