DE20003999U1 - Fastening anchor with bellows - Google Patents

Description

FIREIlO, Babb 03/09 B.

Fixing anchor with inflatable bellows

1. Technical application

Adhesive anchors are mainly used to attach frames, brackets, etc. to concrete, brick or other cement-bound surfaces. The dowel length and diameter, along with allowances for settings and manufacturing tolerances, determine the dimensions of the dowel hole. Rational overall construction is always required. Some examples:

- Building supports and pillars for house and hall construction

- Overall setup of a production plant from individual components

- Inserting brackets during installation

- Calling of equipment and machines

- Installation of railings and similar protection

2. Known versions

Injection anchoring FIS V 150 C, Fischer

Sieve sleeve with anchor rod, HIT injection technology, Hilti

3. Materials

Similar to the known designs, the anchor is made of soft steel; for special cases, it is made of stainless steel; of non-ferrous metals, plastics and much more; the bellows are made of foil-like plastic; in special cases, it is made of fabrics, metals and much more.

FIRERO, Babb 04/09 4. Meaning of ideas

Installation space is precious - minimal interventions in the reinforcement levels are particularly important - and therefore the design of the functional elements used in it must be such that a few individuals with an optimal fastening ratio of dowel hole diameter and depth ensure a clear fastening depending on the load criteria.

Precision is valuable and therefore the design of the functional elements must be such that the greatest possible tolerance specifications for the hole positions, this applies to the periphery as well as to the base, ensure a tension-free , clear and, if required, repeatable precise attachment to the fixed points.

Assembly time is precious and therefore the design of the functional elements must be such that one-off correct adjustment and alignment work, carried out before masking, is retained forever.

Quality is valuable and therefore the design of the functional elements must be such that the intended load possibilities are definitely achieved with the intended safety.

Simplicity is valuable and therefore the design of the functional elements must be such that anyone who works reasonably correctly can produce a reliable version - few work steps, light and easy to handle tools.

The invention is characterized in that:

- within a certain specified framework, positional discrepancies of the fastening holes (delta a) in the periphery and in the base are compensated during processing,

- within a certain specified framework, unevenness in the surfaces (delta f) is compensated, not only in the area of one element but in the area of all elements, in the periphery and the base,

- fixed positions specified by the periphery can be transferred to the base and maintained there,

- in the case of cavities or intentionally created hollow spaces in the base, no indefinable adhesive losses endanger the remaining fastening area, but a slight over-inflation into the hollow spaces (today's state of the art injection technology) provides the actual, mechanically overlapping hold,

FIRERO, Babb 05/09

the work and auxiliary elements to be used (screws, glue, etc.) can be inserted easily and clearly,
Position retention under load is ensured,

Depending on the adhesive, one component is applied to the element, the second and possibly further components are added for masking, this results in a correct sequence of the bonding process,
For the pure erection processes - almost no tensile, predominantly compressive load - a flat design (Figure 3 + 4) is possible, which in particular protects the reinforcement levels.

5. Use

When assembling and attaching individual components to a unit using connecting and fastening anchor elements to form a common base, dowel and hew anchor technology is a wide field and an important factor for function and quality. Tolerances in the area of the drilling and surface positions and additional clearances for alignment and adjustment work have a certain hatch. This must result in the correctly set fixed points for later use without limiting the load-bearing capacity of the whole. The invention enables this task by first attaching the elements to the periphery, then the entire periphery is finally aligned with the base and during the subsequent taping, different adhesive layer thicknesses compensate for the previous hatch differences.

- The elements can be manufactured in familiar production processes, just like the previous versions.

- The size classes depend on the fixing screws, the functions, the specified tolerance ranges, the loads and the load-bearing capacity of the base.

- The set, final position accuracy of the fixed points is retained during masking.

- The preparations etc. for the dowel holes remain essentially the same (slightly larger diameters, but less depth and fewer individuals).

- A clear separation point between the anchor thread and the adhesive hole in the form of a seal protects the thread.

- The provision for the case of need can be done as with screws, butter, standard parts, etc.

FIRERO, Babb 06/09 6. Advantages of the invention

- The dowel hole positions can be determined with simple smocks.

- The advantages and possibilities of crown drilling techniques find a further field of application.

- The elements can be attached to the peripheral frame itself - or to a corresponding device - using a screw, threaded rod or similar with an adhesive feed hole and a Hutter part at the respective fixing point, the whole is aligned together. The fixing position achieved in this way is retained when taping and forever.

- The adhesive can then compensate for the differences in layer thickness.

- In the case of cavities or intentionally created hollow spaces in the base, there is no indefinable loss of adhesive that endangers the adhesion of the remaining bonding surfaces; on the contrary, a deliberate swelling of the hollow edges has a clear hold-enhancing effect (current state of injection technology).

- Correct balancing and adjustment work eliminates the need for readjustment and tuning after gluing.

- Correct masking is possible by simply adding adhesive; one or more components may already be contained in the element and only those that trigger the actual bonding process are added during masking.

- Normally commercially available fasteners, e.g. screws of different designs and strength classes, can be used for final fixing.

- If the specifications are feasible, the clearances for the dowel holes can be correctly and sufficiently created at the time of formwork installation, e.g. in the case of precast concrete elements, etc.

FIRERO, Babb 07/09 7. Explanation of the statements

Figure 1:

The complete element is shown in section, connected to the peripheral frame by means of a tie rod and nut part, immersed in the intended dowel hole. The half-section on the left shows the state before taping, and the half-section on the right shows the state after taping. Delta a indicates the difference in position of the dowel and fastening holes in the peripheral frame. Delta f indicates the unevenness within the area of an element and, in connection with the information in Figure 3, also from element to element.

Figure 2:

The section situation is shown as shown in Figure 1. Delta a explains the position differences in the top view. The designation 2.5 shows a possible arrangement for the connecting holes from the center to the recess in the anchor.

Figure 3:

The same is shown as in Figure 1, only for the flatter element, which is preferably used for erection tasks while protecting the reinforcement. Axial bore and channel combinations according to 3.14 indicate how adhesive gets under the element 1.1 and thus the vertical pressure support can be improved.

Figure 4:

The section situation is shown as shown in Figure 3. Delta a explains the position differences in the top view. 4.5 shows a possibility for the connecting holes from the center to the recess in the anchor. 4.14 shows a possibility for the additional axial holes and channels to bring adhesive under the element 1.1

FIEERO, Babb 08/09

8. List of reference symbols:

1.1 Anchor body

1.2 Inflatable bellows, before taping

1.3 Inflatable bellows, after taping

1.4 reduced diameter central bore

1.5 radial connecting hole crossing the central hole

1.6 Bellows fastening to the anchor body

1.7 Perforation in the bellows skin

1.8 Introduction cone

1.9 closed immersion side

1.10 Glue in the bellows

1.11 Tie rods

1.12 Peripheral frame foot

1.13 Hutter part

2.5 Connecting hole in plan view

3.14 Axial bore and channel combination

4.5 Connecting hole in plan view

4.14 Axial bore combination in plan view

Claims (6)

1. Position offset (delta a) compensating, the set position and support position (delta f) when gluing - the internal volume of the belt-shaped bellows ( 1.2 ) in the external recess of the anchor body ( 1.1 ) increases until the bellows skin comes to rest against the associated bore wall, regardless of the uneven layer thicknesses of the adhesive (within the specified maximum values) - holding, suitable for setting up, attaching and removing objects on floors, walls and ceilings, fastening anchor with inflatable bellows characterized in that , - its central bore on one of the front surface sides has a fastening option for tie rods ( 1.11 ), in particular an internal thread, followed by a sealing area ( 1.3 ) towards the immersion side, after which the bore diameter becomes smaller and at least one radial bore ( 1.5 ) penetrating or crossing this - if there are several, arranged in a roughly star shape - acts as a connection to the penetration area of the outer diameter and thus to the interior of the bellows; the total bore depth is less than the anchor length, so that the other front immersion side is closed ( 1.9 ), - its thread-roll-like outer contour (cylindrical shape with external puncture) has the largest outer diameter on both of its beads, primarily on the surface side - in the non-inflated bellows - and is housed in the puncture area of the inflatable bellows in the shape of a ring belt, - that the front surface in shape and position has a special relationship to the central bore and a suitable approach for very precise, repeatable assembly and disassembly, - that a type of insertion cone, in particular a chamfer, is attached to the outer edge of the immersion side at the largest outer diameter. 2. Inflatable bellows ( 1.2 ) according to claim 1, characterized in that - it is firmly attached in the recess of the anchor body in the area of its front sides ( 1.6 ) in such a way as to withstand adhesive pressure, - in the shrunken, unglued state it is so wrinkled and stretchy that it can cope with the increase in volume when it expands due to the penetration of the adhesive when taping up to the specified frame, - it has numerous perforation points in the area of wall contact created during masking and in the front area on the immersion side for the penetration of a small amount of adhesive to the outer bellows side - a sieve sleeve character. 3. Sealing area ( 1.3 ) according to claim 1, characterized in that it is the separation point between the fastening possibility for the tension anchor ( 1.11 ) and the radial adhesive bore ( 1.4 ) and can also have, among other shapes, that of a flat ring seal. 4. Fastening anchor according to claim 1, characterized in that - its fastening element ( 1.11 ; 1.13 ) to the peripheral frame ( 1.12 ) has a possibility - in particular a central hole - for the introduction of adhesive, which is carried out with a simple pressing pressure depending on the consistency, - it has an anti-twisting device on both, but at least on one, bead of the thread-roll-like outer contour for the glued-in state in the form of notches, flats or other shapes that prevent rotation, - in the recess of the outer diameter in the area of greatest depth it has not only a cylindrical surface contour, but also a surface contour adapted to the adhesive to be used, enlarging the adhesive surface and mechanically gripping. 5. Fastening anchor according to claim 1 and 4, characterized in that - the crossing radial bore ( 1.5 ; 2.5 ) has at least one or more axial bores ( 2.14 ; 4.14 ) which cross or penetrate the latter and are located outside the centre, - the frontal immersion side, essentially in the flatter form which is gentler on the reinforcement planes and is used more for installation purposes, has a channel and penetration system in connection with the crossing axial bore ( 3.14 ; 4.14 ) which is adapted to the adhesive to be used and the application and serves to optimise the adhesive filling state under the anchor element. 6. Inflatable bellows ( 1.2 ) according to claim 1 and 2, characterized in that - when using two- or multi-component adhesives, it is possible to add all components that do not yet trigger the bonding beforehand, - when using two- or multi-component adhesives, it is possible to essentially bake all components that do not yet trigger the bonding to the anchor body, thus eliminating the need for the actual bellows skin.