CN107002402B - Assembly comprising component parts - Google Patents

Abstract

The invention relates generally to an assembly (1) having a component (2) and an anchor plate (4) that can be at least partially consolidated into a concrete component (3). The anchoring plate (4) has at least one anchoring element which can be consolidated into the concrete part (3) in order to transmit transverse forces (5). Furthermore, the anchoring plate (4) is detachably connected to the component (2) with at least one threaded joint (6), wherein the threaded joint (6) comprises at least one screw (7) and a nut (8) with a protective cover (9). The invention is characterized in that the protective cover (9) is designed as a cover which can be slipped over the nut (8) and can be cemented into the concrete. The protective cover (9) has an outer anti-rotation element (11) on its outer side (10) and an inner anti-rotation element (13) on its inner side (12).

Description

components including components

technical field

The present invention relates to an assembly having a component such as a structural support or a steel foundation and an anchor plate capable of being at least partially incorporated into a concrete element to fasten the component to the concrete element. Here, the anchoring plate has at least one anchoring element capable of being fastened into the concrete element to transmit shearing forces and connected to the component parts by means of at least one threaded joint, wherein the threaded joint has at least one One screw and one nut with protective cover.

Background technique

An assembly here refers in particular to a multi-part arrangement consisting of an anchor plate and corresponding component parts interacting with the anchor plate. Such components may be formed, for example, from structural supports, steel bases, or also from feet. Structural supports are commonly used to support a single concrete member in a defined manner into any building such as bridges, trusses, houses, towers or parts thereof, etc. which are preferably unrestricted. In order to connect the component parts to the concrete element, such an assembly has an anchoring plate which establishes an interconnection with the concrete element by means of at least one anchoring element, for example by means of fixing bolts. An anchoring element as referred to in the present invention should be understood as any element suitable for transmitting horizontal loads or shear forces, respectively, in a building. If the component part is required to be replaceable, the component part is connected to the anchoring plate via at least one detachable threaded joint. Since the anchor plate needs to be at least partially consolidated into the concrete element, a part of the threaded joint is located on the side of the anchor plate facing the concrete in the installed state. Typically, this part is the nut of the threaded joint, but can also be the head of a screw.

In order for the component parts to be replaced even after prolonged use, it must be ensured that the threaded joint can always be removed during the service life of the building. It is therefore necessary to prevent concrete from penetrating into the threads of the threaded joint or the threaded joint from being corroded and can no longer be removed during the consolidation of the anchoring plate to the member. To prevent this, known assemblies have protective caps made of steel or another metal - sometimes also referred to as anti-corrosion caps - over the nut of the threaded joint and ultimately welded to the anchor plate. Thereby, the gap between the anchor plate and the metal protective cover is sealed.

In addition, the protective cover serves as a twist preventing portion for the nut of the threaded joint. When the threaded joint is removed or tightened, respectively, the welded protective cover prevents the nuts from co-rotating due to the torque applied when removing or tightening, respectively. For this reason, the known protective cover is formed like a socket wrench so that the nut cannot be turned on its inside. Co-rotation of the protective cover is prevented by welding with the anchor plate.

SUMMARY OF THE INVENTION

It has been found that the known assemblies have the disadvantage that deformations and/or forces acting on the anchoring plate from the components may not only be absorbed by the at least one anchoring element provided for this purpose. Due to the large cross-sectional dimensions of the protective cover, it is conceivable that the deformations and/or forces are also transferred via the protective cover into the threaded joint. This can be a problem if these deformations or forces extend transversely to the axis of the threaded joint, since the threaded joint, which is a high strength threaded joint (HV), is usually already loaded to its load limit.

It is known from WO 2010/061192 A1 that a protective cover is designed as a cover which can be slipped on a nut and which can be fastened into the concrete and has an outer torsion protection on the outside and an inner anti-twist on the inside Twist prevention part.

To remove or tighten a threaded joint, torque is applied to the screw head of the screw. In order to prevent the nut from rotating, the nut must be held by the holding torque. In the assembly according to the invention, the holding torque is applied to the nut by the inner twist preventing portion of the corrosion protection cover. The holding torque is output from the anti-corrosion cover to the concrete member via the outer torsion preventing portion on the outer side thereof. Therefore, the outer twist preventing portion of the outer side of the anti-corrosion cover prevents the anti-corrosion cover from rotating relative to the concrete member when the threaded joint is removed or fastened. The inner twist preventing portion of the anti-corrosion cover prevents the nut from rotating relative to the anti-corrosion cover.

It is therefore an object of the present invention to provide an assembly in which the threaded joint between the anchoring plate and the structural support is not damaged, regardless of the forces present in the member, and in which the assembly is inexpensive to manufacture, The assembly has a more compact size and enables the threaded joint to be removed even after a period of time, wherein the protective cover is securely fastened against loosening.

According to the invention, the solution of the problem is achieved by the assembly according to claim 1 . Appropriate implementations of this component are described in the dependent claims.

The assembly according to the invention is distinguished over the assemblies known from the prior art in that the protective cover has an inner lip, wherein the lip holds the protective cover self-clamping so that the protective cover is firmly fixed against loosening . Corresponding loosening, eg when transporting or installing nuts or screws, can be prevented.

Suitably, the protective cover is selectively adjusted according to its deformability such that it consists of a material which is more easily deformable than the concrete of the concrete element, and/or which is formed such that in the installed state Next, it selectively yields to deformations and/or forces transverse to the axis of the threaded joint such that the resulting force is transmitted into at least one anchoring element of the anchoring plate instead of the threaded joint. Furthermore, the maximum deformation capacity of the anti-corrosion cover is limited so that the nut can be retightened after the threaded joint has been removed.

The deformation capability of the anti-corrosion cover is such that the force or deformation acting on the anti-corrosion cover does not cause a reaction force in the screwing. Instead, the anti-corrosion cover yields, which is why the last applied deformation or force can act on and ultimately dissipate from at least one anchoring element of the anchoring plate. In addition to loads acting on concrete elements, changes in the volume of concrete due to shrinkage, expansion, or also creep deformation are responsible for deformations or forces within concrete elements. Even though the deformations due to these actions are relatively low, the forces they generate are correspondingly large due to the high elastic modulus of concrete. By providing a protective cover of a material that is more easily deformable, eg, a material with a lower modulus of elasticity than concrete, it is possible to selectively control how strongly the material of the protective cover deforms. On the other hand, the maximum deformability of the protective cover must be limited or its material must not deform too easily. This ensures that the protective cover can be protected from the holding torque that occurs when the threaded joint is removed and tightened by means of the inner and outer torsion preventing portions, without the resulting deformation causing the nut to rotate.

That is, in other words, it is achieved that shear forces are mainly absorbed in the anchoring element and do not act on the threaded joint.

Furthermore, the deformability of the protective cover can be influenced by the thickness of the wall thickness. In the case of a protective cover with a thicker wall thickness, there are more accessible ways to yield to the direction transverse to the axis of the thread due to the deformation of the material than in the case of a protective cover with a thinner wall thickness deformation and/or force.

Instead of being fitted over the nut, the protective cover can also be fitted over a suitably shaped screw head of the screw. After the anchor plate and the protective cover have been secured, the screws are prevented from co-rotating when the nut is removed.

It is appropriate if the protective cover prevents the screws and/or nuts from coming into contact with the concrete. Thus, it is guaranteed that the threaded joint remains removable and does not form a connection which cannot practically be removed anymore due to the penetration of the concrete.

It is advantageous if the protective cover has an inner lip, wherein the lip keeps the protective cover self-clamping so that the protective cover is fixed and cannot be removed. For example, the protective cover can be prevented from falling off during transport or when installing nuts or screws.

In this context, it is appropriate if the protective cover has a lower rim, wherein the lip protrudes on the inside of the lower rim. Here, the inner diameter of the lip is smaller than the maximum outer diameter of the nut. Thus, the protective cover is prevented from disengaging from the nut of the threaded joint when concrete is being filled in the formwork. Due to this, concrete can penetrate into the threaded joint and damage it. Furthermore, the lip holds the protective cover in place to ensure that the nut does not co-rotate by means of a form-fit engagement.

Preferably, the lip is configured so thin that it can bend flexibly. Since the inner diameter of the lip is smaller than the maximum outer diameter of the nut, the lip flexes when the anti-corrosion cover is placed over the nut.

It is particularly suitable if the lip is located under the nut after the protective cover has been fully fitted over the nut, since then the lip can return to its original shape. Here, the tight fitting of the lip around the threaded joint ensures a tight fit of the protective cover on the nut and effectively prevents the penetration of concrete or corrosive substances during the entire service life of the building.

In an advantageous implementation of the assembly, the protective cover consists of an elastically and/or plastically deformable material, preferably a plastic, in particular a thermoplastic. The use of elastically and/or plastically deformable materials compared to materials with brittle material properties ensures that when deformations and/or forces act on the protective cover, the protective cover deforms without forming cracks in the protective cover. In this way, the nut of the threaded joint in the protective cover is further protected against the ingress of moisture or corrosive substances, even if the protective cover has been deformed.

The use of plastic to produce the protective cover additionally provides a wider selection of more or less deformable materials compared to the concrete of the concrete elements. In this way, the ratio between the force required to deform the protective cover and the holding torque required to remove and tighten the threaded joint can be adjusted.

Depending on the screw size, the force that can be removed in a direction transverse to the screw axis is also lower than with a larger screw size. On the other hand, the holding torque that occurs with a threaded joint with a smaller thread diameter is also lower than that of a threaded joint with a larger thread diameter. Therefore, it is conceivable to make a protective cover for a threaded joint with a smaller thread diameter from a plastic that is more deformable than the plastic for the protective cover for a threaded joint with a larger diameter.

Furthermore, the use of thermoplastics offers the possibility of producing protective covers in various embodiments in an economically advantageous manner.

Preferably, the component as a protective cover has at least one projection or the like for the outer torsion prevention part to be held in the concrete in a form-fitting manner. Here, the term raised should not be interpreted too narrowly. It also means the surface structure of the protective cover in the form of corners, beams, polymorphs or any other structure that allows anchoring in concrete. When the assembly is installed in a concrete element, first, the liquid concrete is poured into the formwork, wherein the anchoring plates of the assembly are also arranged such that the anchoring plates at least partially contact the liquid concrete. Here too, the liquid concrete surrounds the torsion preventing portion with protrusions attached to the outer side of the protective cover, so that the protective cover, which is placed over the nut of the at least one threaded joint after hardening of the concrete, is positively connected to the concrete Thereby, the rotation of the protective cover relative to the concrete member is easily and effectively prevented.

In a preferred implementation of the assembly, there is a gap between the nut and the protective cover that fits over the nut. Said clearance allows selective yielding of the protective cover due to deformations and/or forces acting transversely to the axis of the threaded engagement and thus particularly effectively protects the at least one threaded engagement from deformations and/or forces acting Impact.

In another implementation, as an inner twist prevention portion, the assembly has at least one opposing element that at least partially contacts the side surface of the nut after the protective cover is placed over the nut. When a protective cover is used, it must be ensured that the threaded joint can be removed without any problems even after long-term use and to prevent co-rotation of the nut when the threaded joint is removed or tightened. These are ensured in the present invention due to the twist prevention achieved by the form-fitting engagement between the side surfaces of the nut and the opposing elements located inside the protective cover. The side surface of the nut should be a flat portion on the edge of the nut extending almost parallel to the axis of the screw. This opposing element is a structure located on the surface of the inner side of the protective cover, which protrudes towards the axis of the nut after the anti-corrosion cover is placed over the nut and engages with the nut or the side surface of the nut in a positive or non-positive manner, respectively. . The opposing element may be, for example, a mating surface, a web, a rib or another suitable profile.

For example, when using a hexagonal nut as the nut, the inner twist preventing portion may preferably have opposing elements in the form of three mating surfaces which are arranged in the protective cover such that the protective cover is placed After slipping over the hex nut, preferably every other hex surface of the hex nut is at least partially in contact with one of the mating surfaces. Since the protective cover preferably consists of a material that is more easily deformable than concrete, point loads on one side lead to force peaks and, therefore, deformation of the material of the protective cover. This effect can also occur when the holding torque is transmitted from the protective cover to the nut on only one side through the contact of the mating surface with the side surface when the threaded joint is removed or tightened.

In order to avoid selective unilateral overloading of the protective cover by the holding torque, it has proven to be advantageous if the protective cover has several opposing elements evenly distributed on its inner side. Preferably, these elements are in uniform contact with one of the side surfaces of the nut.

That is, when a commercially available hex nut with six side surfaces is utilized, so for example, a protective cover with three mating surfaces can be utilized. Thus, for example, when a square nut is used, a protective cover with two mating surfaces can be utilized. In this way, a uniform transmission of the holding torque through the protective cover to the nut is achieved.

It is also conceivable that several opposing elements arranged inside the protective cover are arranged to engage correspondingly with the nut or one or more side surfaces of the nut, so that further rotation is effectively prevented. For example, multiple webs or ribs may be provided, thereby also facilitating the placement of the protective cover on the nut.

Furthermore, this arrangement has the advantage that the gap present between the protective cover and the nut is distributed uniformly over the side surface of the nut, wherein the uniform distribution of the gap is first also achieved by the lips. Thus, the protective cover of the assembly according to the invention can uniformly yield to forces and/or deformations acting from different directions transverse to the axis of the threaded joint.

In a preferred embodiment of the assembly, the protective cover in the region of the at least one opposing element has a free inner diameter which is smaller than the largest outer diameter of the nut and larger than the smallest outer diameter of the nut.

In a conventional hexagon nut, the smallest inner diameter is obtained by the distance between the two opposing side surfaces of the hexagon, and the largest outer diameter corresponds to the distance between the two opposing edges of the hexagon nut. Here, the free inner diameter of the anti-corrosion cover corresponds to the diameter of the circle located on the inside of the protective cover, correspondingly tangent to the inside of the protective cover or to at least one opposing element. In other words, the free inner diameter corresponds to the size with which the phantom body inside the protective cover can still be rotated without the rotation of the phantom body being restricted by the twist preventing portion of the protective cover. Therefore, by changing the free inner diameter, it is possible to adjust the size of the gap that exists between the nut and the protective cover after the protective cover is fitted over the nut. If the free inner diameter corresponds to the minimum outer diameter of the nut, there is no clearance. If the measurement of the free inner diameter exceeds the dimension of the maximum outer diameter of the nut, this will lead to the fact that the nut will rotate when removing or tightening the threaded joint. Because the maximum holding torque that can be transmitted is greatest in the case of zero-backlash holding of the nut by the protective cover, and the ability to yield to forces or deformations acting transversely to the axis of the threaded joint is greatest in the case of maximum backlash Yes, these parameters of the protective cover can be influenced particularly easily by variations in the free inner diameter.

In another implementation of the assembly, the guard cover has an anti-tilt guard for the nut. If a structural support needs to be replaced in a building, the structural support can be removed from the building by removing the threaded joint connecting the structural support to the anchor plate. When the new structural support is installed, it occurs that the nut present in the protective cover is tilted to one side from the axis of the screw. This leads to the fact that the screws of the threaded joint can no longer be screwed into the threaded holes and threads. Since the nut is inaccessible together with the protective cover and the anchoring plate into the concrete of the building, the nut of the threaded joint can only be accessed or lifted again by mortising in the concrete. Due to the need to avoid such situations, the assembly according to the invention has in its protective cover an anti-tilt guard. The anti-tilting guard can be, for example, a protrusion on the inner surface of the guard cover, which can easily and effectively avoid tilting of the nut and hold it in place.

In a preferred implementation of the assembly, the protective cover is filled with an anti-corrosion agent, so that the free surface of the nut is wetted by the anti-corrosion agent after the protective cover is placed over the nut. As the corrosion inhibitor, greases and other substances suitable for preventing the penetration of moisture and corrosive substances into the threaded joint are particularly suitable. At the same time, the anti-corrosion agent enables the threaded joint to be easily removed even after the service life of the component parts has expired.

Description of drawings

The invention will be described in more detail below by means of examples of components illustrated in the accompanying drawings. In the attached image:

Figure 1 schematically shows a cross-sectional view of a first example of an assembly according to the invention;

Figure 2 schematically shows details of the components shown in Figure 1;

Figure 3 schematically shows a perspective view of the protective cover of the assembly shown in Figures 1 and 2;

Figure 4 schematically shows a longitudinal cross-sectional view of the protective cover of the assembly shown in Figure 3, taken along section line A-A;

Figure 5 schematically shows a cross-sectional view of the protective cover of the assembly shown in Figures 3 and 4, taken along section line B-B;

Figure 6 schematically shows a plan view of a nut of a threaded joint used in the assembly shown in Figure 1;

Fig. 7 schematically shows a cross-sectional view of the protective cover shown in Fig. 3, wherein the protective cover is sleeved on the nut;

Fig. 8 schematically shows a cross-sectional view of the protective cover as in Fig. 7, wherein the protective cover is fitted over the nut; and

Figure 9 schematically shows an alternative embodiment of the opposing elements of the protective cover.

Throughout the drawings, the same reference numerals are used to refer to the same parts.

Detailed ways

Figure 1 shows an example of an assembly 1 with component parts 2 according to the invention. Assembly 1 in this example is support assembly 1 . It has two anchor plates 4, each of which is connected by means of two threaded joints 6 to a component which in this example is configured as a structural support 2 . In each anchoring plate 4, four anchoring elements 5 in the form of fixing bolts 5 can be observed. Each threaded joint 6 consists of a screw 7 and a nut 8 . The lower anchoring plate 4 is consolidated into the concrete element 3 as indicated by hatching in FIG. 1 . Here, the four fixing bolts 5 provide the interconnection between the concrete element 3 and the anchoring plate 4 . Each of the two illustrated nuts 8 of the threaded joint 6 between the lower anchoring plate 4 and the structural support 2 is prevented from contact with the concrete of the concrete element 3 by a protective cover configured as an anti-corrosion cover 9 . In addition, it is clear that the two nuts 8 of the threaded joint 6 are located below the anchoring plate 4 and therefore inaccessible after the anchoring plate 4 has been consolidated into the concrete of the concrete element 3 .

The last of the two anchor plates 4 shown in FIG. 1 is shown in a state before the anchor plate 4 is fixed into the concrete element 3 . At this time, the anti-corrosion cover 9 is still not sleeved on the two nuts 8 of the threaded joint 6 .

FIG. 2 shows a detailed view of the embodiment of the support assembly 1 shown in FIG. 1 . Therein is shown the lower anchor plate 4 connected to the structural support 2 by means of threaded joints 6 . The threaded joint 6 consists of a screw 7 and a nut 8 . The anti-corrosion cover 9 is sleeved on the nut 8 . The anti-corrosion cover 9 prevents the threaded joint 6 from contaminating the concrete during the consolidation of the concrete element 3 . The anti-corrosion cover 9 has at its lower edge 23 a lip 24 which contains the threaded joint 6 under the nut 8, thereby holding the anti-corrosion cover 9 in place on the screw joint. In addition, the lip 24 seals the threaded joint 6 against ingress of corrosive substances. In addition, the anti-corrosion cover 9 has an outer torsion preventing portion 11 which is in positive contact with the concrete of the concrete element and prevents the anti-corrosion cover from rotating after the concrete has consolidated.

FIG. 3 shows a perspective view of the anti-corrosion cover 9 . On the outer side 10 four projections 17 of the outer torsion preventing part 11 are shown, which prevent the anti-corrosion cover from rotating in the concrete after the concrete has consolidated. In addition, on the inner side 12 of the anti-corrosion cover, it can be observed that it has a counter element in the form of a mating surface 18 of the inner twist prevention portion 13 . In addition, the anti-corrosion cover 9 has a lip 24 at its lower edge 23 .

FIG. 4 shows a side vertical projection of the corrosion protection cover 9 shown in FIG. 3 in partial section. This sectioning is carried out along section line A-A drawn in FIG. 5 . From the point of view of the anti-corrosion cover 9 , two projections 17 of the outer twist preventing portion 11 can be seen on the outer side 10 . In the longitudinal section of the anti-corrosion cover 9 , the lip 24 arranged at the lower edge 23 of the anti-corrosion cover 9 is shown on the inner side 12 . The lip 24 is configured as a narrow lug so that the lip can be elastically pushed back. In addition, it can be seen in the longitudinal section that the projections 17 of the outer torsion protection 11 are designed as reinforcements of the wall 27 . The same applies to the structure of the mating surface 18 on the inner side 12 . It is evident that this mating surface 18 penetrates into the projections 17 of the outer torsion prevention part 11 via the housing as a reinforcement of the wall 27 by adhesion.

FIG. 5 shows a cross-sectional view of the anti-corrosion cover 9 taken along the section line B-B illustrated in FIG. 4 . Here, it is apparent that the anti-corrosion cover 9 has six protrusions 17 as the outer twist preventing portion 11 . In addition, the anti-corrosion cover 9 is shown with three opposing elements configured as mating surfaces 18 of the inner twist preventing portion 13 , which are uniformly distributed on the inner side 12 of the anti-corrosion cover 9 . It is evident that one protrusion 17 of the outer twist preventing portion on the outer side 10 is opposite a corresponding one of the mating surfaces 18 arranged on the inner side 12 . In addition, the free inner diameter 20 is drawn as a theoretical diameter allowing full rotation within the protective cover 9 .

Figure 6 shows the nut 8 which is an embodiment of a hexagon nut. The hexagonal nut has six side surfaces 19 on the outside thereof, and each of the six side surfaces 19 forms a rim 26 on its section line. In the center of the nut 8, there is a threaded threaded hole 25. Furthermore, the illustration of the nut shown in FIG. 6 clarifies that the maximum outer diameter 21 of the nut 8 is greater than the minimum outer diameter 22 of the nut 8 . Here, the minimum outer diameter 22 is the distance between the two opposing side surfaces, wherein the maximum outer diameter 21 is the distance between the two opposing edges 26 .

FIG. 7 shows a cross-sectional view of the anti-corrosion cover 9 already illustrated in FIG. 5 , however, where the anti-corrosion cover 9 is fitted over the nut 8 . Here, the illustrated embodiment of the nut 8 corresponds to a hexagonal nut as illustrated in FIG. 6 . Arranged on the inner side 12 of the anti-corrosion cover 9 are three opposing elements of the inner twist prevention 13 which are configured as mating surfaces 18 . The three mating surfaces 18 are evenly distributed on the inner surface 12 of the anti-corrosion cover such that one mating surface 18 is opposite or in contact with every other of the six side surfaces 19 of the nut 8 . Furthermore, there is a gap 16 between the mating surface 18 and the side surface 19 . Said clearance allows the anti-corrosion cover 9 to yield to the deformation or force 15, respectively, in the event of a force 15 or deformation acting transversely to the screw axis 14.

The cross section of the anti-corrosion cover 9 shown in FIG. 8 corresponds to the cross section shown in FIG. 7 . Furthermore, a state in which a momentum M for removing or tightening the threaded joint 6 is applied is illustrated. Due to the momentum M, the nut 8 rotates slightly in the anti-corrosion cover 9 until every other edge of the six edges 26 comes into contact with one of the three mating surfaces 18 of the inner twist preventing portion 13 . The anti-corrosion cover 9 is prevented from being rotated by the holding torque HM acting uniformly on the six protrusions 17 of the outer twist preventing portion 11 .

In Figure 9, three further alternative embodiments for opposing elements are illustrated. All three figures have in common that the nut 8 is shown in dashed lines. In the above figure, the opposing element 18a is configured in the form of a web or rib, wherein the side surface 19 is tangent to each of the two webs 18a. The middle view also shows the opposite element in the form of a web or rib 18b, wherein said web 18b has a trapezoidal outer contour. In the lower view of Figure 9, a third alternative for the opposing element is illustrated. In this alternative, the opposing elements are formed in the form of teeth 18c. What all the illustrated alternatives have in common is that the anti-corrosion cover 9 fits well over the nut 8 because the anti-corrosion cover 9 can only be turned on the nut 8 slightly.

For these rib-like opposing elements 18a, 18b, the lack of coaxial centering feature is also achieved by the lip 24 in terms of the relative movability of the geometry between the protective cover 9 and the nut 8. In the case of increased mobility by deformation, this requirement is no longer necessary.

List of reference numerals:

1 Assembly/Support Assembly

2 Components/Structural Supports

3 Concrete elements

4 Anchor plate

5 Anchor elements/fixing bolts

6 Threaded joints

7 screws

8 Nuts

9 Protective cover/anti-corrosion cover

10 Outside

11 External torsion prevention part

12 inside

13 Internal twist prevention part

14 Axis of threaded joint

15 Deformation/Force

16 gap

17 Raised

18 Opposing element/mating surface

18a Opposing element/web or rib

18b Opposing element/web or rib

18c Opposing element/teeth

19 side surface

20 free inner diameter

21 Maximum outer diameter

22 Minimum outer diameter

23 Bottom edge

24 Lips

25 Threaded hole with thread

26 edges

27 walls

M Momentum (Tightening/Removing Momentum)

HM holding torque

Claims (15)

1. An assembly (1) comprising a component part (2) and an anchoring plate (4) capable of being at least partially consolidated into a concrete element (3) to attach the component part ( 2) Fastening to the concrete element (3), wherein the anchoring plate (4) has at least one anchoring element (5) capable of being fastened to the concrete element ( 3) to transmit shearing forces, and the anchoring plate (4) is detachably connected to the component part (2) by means of at least one threaded joint (6), wherein the threaded joint (6) ) has at least one screw (7) and at least one nut (8) with a protective cover (9), Therein, the protective cover (9) is configured as a cover which can be slipped over the nut (8) and can be fastened into concrete, and the outer side (10) of the cover is provided with an external torsion prevention part (11), the inner side (12) of the cover has an inner twist preventing portion (13), It is characterized in that, The protective cover (9) has an inner lip (24), wherein the lip (24) is formed so thin that it can be flexibly bent and the lip (24) holds the protective cover as Self-clamping enables the protective cover (9) to be securely fixed against loosening. 2. Assembly (1) according to claim 1, characterized in that the component part (2) is a structural support or a steel base. 3. Assembly (1) according to claim 1, characterized in that the at least one anchoring element (5) is a fixing bolt. 4. Assembly (1) according to claim 1, It is characterized in that, With regard to the deformability of the protective cover (9), the protective cover (9) is selectively adjusted such that the material constituting the protective cover (9) is more easily deformed than the concrete of the concrete element (3) and/or the protective cover (9) is formed such that in the mounted state the protective cover (9) selectively yields to deformations and/or forces ( 15) so that the generated force is transmitted into the at least one anchoring element (5) of the anchoring plate (4) and not into the threaded joint (6), wherein the protective cover (9) The maximum deformability of the nut is limited so that the nut (8) can be tightened again after the threaded joint (6) has been removed. 5. The assembly (1) according to any one of claims 1 to 4, It is characterized in that, The protective cover (9) prevents the screw (7) and/or the nut (8) from coming into contact with the concrete. 6. Assembly (1) according to any of claims 1 to 4, It is characterized in that, The protective cover (9) has a lower edge (23), wherein the lip (24) protrudes on the inner side (12) of the lower edge (23), wherein the lip (24) The inner diameter is smaller than the maximum outer diameter (21) of the nut (8). 7. Assembly (1) according to any of claims 1 to 4, It is characterized in that, The protective cover (9) consists of an elastically and/or plastically deformable material. 8. Assembly (1) according to claim 7, It is characterized in that, The protective cover (9) consists of plastic. 9. Assembly (1) according to claim 8, It is characterized in that, The protective cover (9) consists of thermoplastic. 10. Assembly (1) according to any of claims 1 to 4, It is characterized in that, The outer twist prevention portion (11) of the protective cover (9) has at least one projection (17) for form-fit retention in the concrete. 11. Assembly (1) according to any one of claims 1 to 4, It is characterized in that, There is a gap (16) between the protective cover (9) which is fitted over the nut (8) and the nut (8). 12. Assembly (1) according to any one of claims 1 to 4, It is characterized in that, The inner torsion preventing portion (13) has at least one opposing element capable of engaging with the side surface of the nut (8) after the protective cover (9) is fitted over the nut (8). (19) At least partially contact. 13. Assembly (1) according to claim 12, It is characterized in that, The protective cover (9) has a free inner diameter (20) in the region of the at least one opposing element, the free inner diameter (20) being smaller than the maximum outer diameter (21) of the nut (8) and larger than the nut (8) minimum outer diameter (22). 14. Assembly (1) according to any of claims 1 to 4, It is characterized in that, The protective cover (9) has an anti-tilt guard for the nut (8). 15. Assembly (1) according to any of claims 1 to 4, It is characterized in that, The protective cover (9) is filled with an anti-corrosion agent, so that the free surface of the nut (8) is wetted by the anti-corrosion agent after the protective cover (9) is put on the nut (8).

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