WO2024251508A1 - Fastening system and method for mounting in a substrate - Google Patents

Abstract

A fastening system for mounting has a bushing (720) and an inner element (750), wherein: the bushing has a holding region (740), an expansion zone (730) and a drill hole at one end and a tool opening at the other end; the expansion zone comprises at least one expansion segment (735) which is designed to extend at least partially into the bushing; and the inner element is at least partially arranged within the bushing and is movable relative to the bushing; and the inner element has a drilling region (770) and an expansion region (780); the drilling region has at least one cutting element, and the drilling region at least partially projects out of the drill hole in the bushing, and the expansion zone of the inner element is adapted to expand the expansion zone of the bushing in a direction from the tool opening to the drill hole during a movement of the expansion zone in the bushing and relative to the bushing.

Description

Fastening system and method for mounting in a substrate

The present invention relates generally to a fastening system and a method for mounting in a substrate. Furthermore, the invention also relates to a method for producing a fastening system according to the invention.

In the state of the art, numerous systems for mounting in a substrate are known that make it possible to fasten objects relative to the substrate. What these known systems have in common is that they are anchored in the substrate in a multi-step process. For example, systems consisting of a dowel sleeve and a fastening element are known in which a blind hole is first created in the substrate to accommodate the dowel sleeve. After the dowel sleeve has been inserted into the blind hole, the fastening element is screwed into the dowel sleeve and anchored typically by deforming the dowel sleeve. Such known systems can be used, for example, to fasten insulating materials relative to a substrate or to fasten heavy loads to a substrate.

However, the known systems have the disadvantage that the assembly process consists of several steps. As a rule, at least three steps are required to anchor the system in the substrate, namely firstly the creation of a blind hole, secondly the placement of a dowel sleeve in the blind hole and thirdly the relative movement between a fastening element and the dowel sleeve to deform the dowel sleeve and thereby create a force-fit connection between the substrate and the fastening system. While the creation of the blind hole is typically the same for the known systems, the other two steps can be different for each system. For example, in the case of a system for fastening an insulating material to a substrate, first only a dowel sleeve can be inserted into the blind hole and then a fastening element can be inserted into the dowel sleeve, wherein the fastening element deforms at least a partial area of the dowel sleeve in order to achieve a sufficient anchoring effect in the substrate. The load-bearing capacity is generated by the friction of the deformed part of the sleeve on the walls of the blind hole. On the other hand, in the case of a typical heavy-duty anchor, a system consisting of a dowel sleeve and a fastener arranged in the dowel sleeve is inserted into the blind hole. The fastener is then rotated relative to the dowel sleeve to partially pull it out of the dowel sleeve, whereby the relative movement spreads a portion of the dowel sleeve to create an undercut that applies the load-bearing capacity. Even if the explicit steps of the known assembly processes are different or can be varied, the known assembly processes in any case require several clearly separated steps.

In addition, known assembly processes typically require several tools, namely firstly a tool for creating the blind hole and secondly at least one other tool for moving the fastener and the dowel sleeve relative to each other. In the case of the aforementioned system for fastening insulation materials, a drill is usually used to create the blind hole and, for example, a screwdriver is used to insert the fastener into the dowel sleeve, while in the case of the aforementioned system for fastening heavy loads, a drill is also used to create the blind hole and a wrench or socket wrench is also used. In addition, in some cases additional tools may also be necessary to remove drilling dust that arises when creating the blind hole.

The object of the present invention is therefore to overcome the aforementioned disadvantages and to provide a system that simplifies the assembly process.

This object is achieved by a fastening system according to the invention, a method according to the invention for assembling a fastening system and a method according to the invention for producing a fastening system, as described in the independent claims. Preferred and advantageous embodiments can be found in the dependent claims and in the following description. The fastening system according to the invention is configured for mounting on a substrate. The substrate can be an anchoring base or a multi-layer substrate, for example consisting of one or more insulating materials and an anchoring base. The fastening system according to the invention has a sleeve and an inner element. The sleeve has a holding area and an expansion zone. The expansion zone has at least one expansion segment that is designed to extend at least partially into the sleeve. The at least one expansion segment can extend into the sleeve in an initial state, i.e. before the sleeve is expanded. However, it can also be possible for the at least one expansion segment to initially extend outwards from the sleeve in the initial state and only be pressed into the interior of the sleeve when the sleeve penetrates the substrate, so that it can be expanded during the assembly process by a movement of the inner element as described below.

The sleeve also has a drilling opening at a first of its two ends and a tool opening at the other end. During the assembly process, the holding area applies a force at a certain point during assembly to prevent the sleeve from penetrating further into the substrate. Within the scope of the present invention, there are various ways in which the holding area can be designed. The holding area can generally be formed by the diameter of the sleeve increasing in a certain section. For example, the holding area can be realized as a projection formed circumferentially at the first end. The holding area can also be formed by a thickening of the sleeve, whereby a thickening of the sleeve can be formed both by an area with increased wall thickness or can be achieved by shaping the sleeve, i.e. the sleeve can have a bulge, for example. Further embodiments can include a holding area in the form of a holding plate, for example for holding insulation material, or in the form of a conical or step-shaped increasing section. With reference to further preferred embodiments, further possibilities as to how the holding area can be designed will be shown later, without the disclosure being limited to one of these variants. The expansion zone is arranged at least partially between the holding area and the drilling opening. The sleeve can essentially be formed by a hollow cylinder, with the drilling opening and the tool opening then being located, for example, on the cover and the bottom of the hollow cylinder, respectively.

During assembly, the inner element is at least partially arranged within the sleeve and is movable relative to the sleeve. A corresponding arrangement of the inner element at least partially within the sleeve can preferably already take place during production, or alternatively only immediately before assembly. The inner element also has a drilling area and a spreading area. The drilling area has at least one cutting element. The at least one cutting element is suitable for cutting into the substrate when using the fastening system. The drilling area protrudes at least partially from the drilling opening of the sleeve. This means that at least a section of the drilling area is located outside the sleeve. For example, the entire drilling area or a section of the drilling area can be located outside the sleeve in order to allow contact between the drilling area and the substrate during the assembly process. As the person skilled in the art will recognize, the term "drilling area" is not to be understood as meaning that the drilling area is exclusively limited to drilling processes. Rather, the drilling area can also be designed to enable chiseling. For example, the at least one cutting element of the drilling region can be adapted for cutting into a substrate or the at least one cutting element can be adapted for chiseling into a hard substrate.

The expansion area of the inner element is adapted to expand the expansion zone of the sleeve when the expansion area moves in the sleeve and relative to the sleeve in the direction from the tool opening to the drilling opening, i.e. during assembly further towards the substrate. This means that the inner element moves relative to the sleeve during assembly and this movement moves the expansion area, which is at least partially located inside the sleeve, in a direction from the tool opening to the drilling opening. As a result, the expansion area exerts a force on the expansion zone of the sleeve. This force can cause the sleeve to be carried along with the movement of the inner element. Furthermore, if a minimum force is exceeded, the expansion zone can cause the expansion zone to expand. Since the holding area counteracts the further penetration of the sleeve into the subsoil with a force, the holding area can be designed as a setting depth limiter.

The spreading of the spreading zone can be achieved, for example, with the help of at least one spreading segment. In the following description, in particular the description of the figures, the functionality of such spreading segments is explained using several spreading segments, but within the scope of the invention only one spreading segment can be used. The spreading segments are designed in such a way that they extend into the interior of the sleeve during assembly, in particular when the spreading zone of the sleeve is located underground. The movement of the inner element pushes the spreading segments at least partially out of the sleeve and thus spreads the spreading zone.

The advantage that the fastening system described offers over the prior art is that the fastening system can be mounted on a substrate in a single step. To do this, the at least one cutting element of the inner element can be introduced into the substrate (for example by rotating the inner element and thus the at least one cutting element) and thereby create a blind hole in the substrate. The inner element carries the sleeve with it, whereby the sleeve is drawn into the blind hole by the movement of the inner element. The sleeve is carried along with the movement of the inner element until the holding area of the sleeve prevents further penetration into the substrate. The holding area prevents the sleeve from penetrating the substrate further by applying a force to oppose further penetration. Within the scope of the present invention, the holding area can be designed in a wide variety of ways. One possibility is that the holding area has a projection that prevents the holding area from penetrating the substrate. Other designs are also possible and examples of such other designs are described further below. The force that the holding area exerts to prevent the sleeve from penetrating further into the ground is directed against the forward thrust and prevents the sleeve from being carried along with the movement of the inner element and thus preventing the sleeve from penetrating further into the ground. This results in a Relative movement between the inner element and the sleeve. As a result of this relative movement, the expansion area of the inner element expands the expansion zone of the sleeve and thus creates a force-locking anchoring of the sleeve in the substrate.

Thus, the creation of a blind hole in the subsoil, the insertion of the sleeve into the subsoil and the expansion of the expansion zone of the sleeve (i.e. anchoring) all take place in one step by driving the inner element into the subsoil. Furthermore, the complete installation process of the fastening element in the subsoil only requires a single setting tool that is suitable for driving at least one cutting element of the inner element, for example by rotation and/or impact, and thereby driving the inner element into the subsoil. This not only simplifies the process for assembling a fastening system, but also reduces the number of tools to be used.

Preferred embodiments of the fastening system according to the invention are described below.

The expansion zone of the sleeve has a first outer diameter in the unspread state and the drilling area of the inner element has a maximum second outer diameter. In a preferred embodiment, the drilling area is essentially pointed at its front end, which first hits the ground, and widens towards its rear end. As a result, the outer diameter of the drilling area changes depending on the distance from the tip. In addition, the at least one cutting element of the drilling area can be designed as one or more projections formed on the peripheral surface of the drilling area, which do not necessarily extend over the entire circumference. Therefore, the following refers to a maximum outer diameter of the drilling area. In a preferred embodiment, this is the diameter of the largest circumferential circle of the drilling area. To distinguish it from the outer diameter of the expansion zone of the sleeve, this maximum diameter of the drilling area is referred to as the maximum second outer diameter. This maximum second outer diameter of the drilling area defines the inner diameter of the blind hole. Preferably, the maximum second outer diameter is equal to the first outer diameter, i.e. the outer diameter of the unspread expansion area of the sleeve, or larger than the first outer diameter of the sleeve. This allows the sleeve to slide into the blind hole with little resistance during the assembly process until the holding area prevents further penetration.

The person skilled in the art will understand that equality of diameters in this context means that the diameters can be essentially the same. Essentially the same in this context means that certain processing tolerances are permitted. What is relevant is that the first and second outer diameters are matched to one another in such a way that they allow the sleeve to penetrate into the blind hole - in particular by being carried along with the movement of the inner element - but also allow the expansion of the expansion zone of the sleeve to provide sufficiently strong anchoring of the sleeve in the blind hole.

In a further preferred embodiment, the expansion region of the inner element is designed such that the expansion region can rotate freely within the sleeve, so that rotation of the inner element does not necessarily lead to rotation of the sleeve. This allows the inner element to be driven to create a blind hole in the subsoil without impairing the ability of the inner element to take the sleeve with it when driving into the subsoil. This can be achieved, for example, by a conical design of the expansion region. However, this can also be achieved by the cross sections of the expansion region and the interior of the sleeve not having a complementary geometry. Furthermore, the conical design allows the expansion region to hit the expansion zone when the inner element is driven forward and a successive expansion of the expansion zone as the inner element is driven further. In other preferred embodiments, however, the expansion region can also be designed in a step-like manner, with the steps having a larger outer diameter as the distance from the drilling area increases. In still other preferred embodiments, the expansion region can also be designed as a thread or as a knurling. Consequently, the inner element preferably has a shape with different outer diameters. The drilling area has the largest outer diameter. The expansion area has an outer diameter that varies depending on the distance from the drilling area. Preferably, the outer diameter of the expansion area is largest at the point furthest from the drilling area. However, this largest, i.e. maximum, outer diameter of the expansion area is preferably smaller than the outer diameter of the drilling area. Between the drilling area and the expansion area, the diameter of the inner element is smaller than the outer diameter of the drilling area and the maximum outer diameter of the expansion area. This results in a type of notch, which can also be referred to as a trough, between the drilling area and the expansion area. The trough allows the expansion zone of the unexpanded sleeve to encircle the inner element in the area of the trough. This becomes clearer with reference to the attached drawings, in particular Figures 1 and 4.

In some embodiments, the expansion region of the inner element can be formed by at least one recess or at least one projection, whereby combinations of recesses and projections are also included. For example, the inner element behind the drilling region can be cylindrical, whereby the cylinder has the at least one recess or the at least one projection. In other words, the advantageous change in the diameter of the inner element described in the above embodiments can also be achieved via recesses and/or projections. The person skilled in the art will recognize that geometric shapes other than a cylinder are also possible and can be combined with recesses or projections.

The at least one expansion segment of the sleeve can interact with the at least one recess or the at least one projection during the described movement of the inner element relative to the sleeve in such a way that the at least one expansion segment is at least partially pressed out of the sleeve. The at least one expansion segment can be designed in such a way that a section of the expansion segment protrudes into the sleeve, whereby this section can also be referred to as the free end of the expansion segment. The other end of the expansion segment can be attached to the sleeve. the interaction of the expansion segment and the recess or projection, the free end of the expansion segment is carried along by the recess or projection when the inner element moves, causing the expansion segment to deform. During this deformation, a middle section located between the fixed end and the free end can be deformed and thereby displaced out of the sleeve. In this way, the expansion segment is deformed and pressed out of the sleeve against the substrate, enabling the sleeve to be anchored. This anchoring takes place during the setting process by a movement of the inner element relative to the sleeve in the direction of the substrate, thereby simplifying the setting process.

Preferably, the at least one recess or the at least one projection is rotationally symmetrical, i.e. is designed to run all the way around the (cylindrical) body. This is advantageous if the movement of the inner element relative to the sleeve is achieved by setting the inner element in rotation. Due to the rotational symmetry, the at least one expansion segment can engage in the recess or the projection can press against the at least one expansion segment and this interaction can continue regardless of the rotational position. In addition, it should be noted that a rotationally symmetrical recess or a rotationally symmetrical projection can be used to spread several expansion segments, for example if the several expansion segments are located at the same height at circumferential positions on the outer surface of the sleeve, as is shown for example in Figure 5.

In a further preferred embodiment, the at least one cutting element can be designed as a cutting edge. Furthermore, in a preferred embodiment, the drilling area can have several cutting elements, each of which is designed as cutting edges. Preferably, these several cutting edges are arranged on the surface of the drilling area such that they extend radially outwards along the surface from the center of the surface (ie the tip of the drilling area). Preferably, three cutting elements are provided, which are designed as cutting edges. Further preferably, the three cutting edges have an angle of 120° to one another. In a further preferred embodiment, the inner element can be formed at least partially from a metal. For example, the at least partial formation of the drilling area - in particular of the at least one cutting element - from a metal can enable advancement in hard substrates such as concrete or masonry. The drilling area or at least the at least one cutting element can be made from hardened steel, for example. Alternatively, the at least one cutting element can also be formed by applying sintered material to a drilling area made from stainless steel.

Alternatively or additionally, the sleeve can be formed at least partially from a metal. Forming the sleeve from a metal can be recommended, for example, for heavy-duty anchors, in which a spreading of a metallic spreading zone of the sleeve creates an undercut in the subsurface and thus provides a particularly high pull-out force. A suitable metal would be steel, for example. However, it is also possible to manufacture at least the sleeve from a plastic, which can be recommended, for example, for a fastening system for fastening insulating materials in order to avoid thermal bridges. Forming the sleeve from a metal is particularly preferred - but not limited to - for the embodiments in which the spreading zone is formed from at least one spreading segment and the spreading area of the inner element has at least one recess and/or at least one projection. If the at least one spreading segment, which in this case is formed from metal, is deformed by the movement of the inner element and is thereby pushed out of the sleeve, the deformation of the spreading segment formed from metal causes a particularly advantageous anchoring in the subsurface, which means that even heavy loads can be carried.

In further preferred embodiments, the sleeve and/or the inner element are designed in such a way as to allow removal of drilling dust that arises during assembly. Removal of drilling dust can be made possible, for example, by providing one or more additional openings in the sleeve and/or the inner element or by forming a channel, for example, between the sleeve and the inner element. For example, openings can be provided on the side of the sleeve through which drilling dust can enter the interior of the sleeve during the assembly process. The drilling dust can preferably be removed from the fastening system from here, for example via a suction device of a setting tool or by forces during the assembly process that arise when the fastening system is driven into the substrate. Alternatively or additionally, one or more additional openings can be formed in the drilling area of the inner element. In this case too, a setting tool with a suction device can be used, which interacts with this one or more additional openings to remove the drilling dust.

The channel can be formed inside the sleeve. In another preferred embodiment, the channel can be formed on an outside of the sleeve. Alternatively, the channel for removing drilling dust can also be formed inside the inner element. If the channel is formed inside the inner element, the setting tool used to drive the inner element can have a corresponding channel that is connected to the channel inside the inner element when the setting tool engages the inner element. This enables, for example, the suction of drilling dust if the setting tool is equipped with a suction device.

In the case of one or more additional openings or a channel, the drilling area of the inner element can preferably be designed such that the drilling area forms a suction drill to which a suction device of a setting tool can be connected. The inner element particularly preferably has a receptacle which is connected to at least one of the additional openings or the channel, for example by forming a path through which the drilling dust can pass through the inner element. The setting tool is preferably designed such that it is adapted to be able to engage in the receptacle and to be able to establish a connection there between a suction device of the setting tool and the path formed in the inner element.

One or more additional openings or a channel for the removal of drilling dust offer the advantage that the drilling dust does not collect in the area of the drilling area and prevents the advance of the inner element and/or the sleeve. When the inner element is driven forward, the drilling dust can get into the interior of the sleeve or into the channel and be transported away from there.

The holding area is adapted to prevent further penetration of the sleeve into the substrate by opposing further penetration of the sleeve into the substrate with a force. Thus, the holding area causes the expansion zone to expand when the inner element is driven further into the substrate. Several examples of the design of such a holding area are described within the scope of the present invention. In general, the holding area can be formed by the diameter of the sleeve increasing in one section. However, the person skilled in the art will recognize that this function can also be achieved by means other than those described below. For example, the holding area can be designed as a projection on the sleeve around the circumference. In a preferred embodiment, the holding area of the sleeve can also be designed as a holding plate. A holding plate can form a flat ring, an annular projection or an annular disk that is arranged around the circumference of the sleeve. Preferably, the holding plate can be arranged at the end of the sleeve that has the tool opening. Such a holding plate is particularly suitable for use with a multi-layer substrate that has, for example, an anchoring base and an insulating material. In this case, the retaining plate can be used to attach the insulation material to the anchoring base. The expert will understand that an additional component, such as a waterproofing membrane resting on the insulation material, can also be held relative to the base by the retaining plate.

In a further preferred embodiment, the sleeve can also have, in addition to a first holding area, a further holding area which is designed as a holding plate. In this case, the further holding area designed as a holding plate only serves to hold an insulating material relative to the substrate, while the first holding area applies the force at a certain point during assembly to prevent the sleeve from penetrating further into the substrate and thus causing the expansion zone to expand. In this case, the first holding area is preferably placed between the drill opening and the holding plate. In a further preferred embodiment, the inner element can have a receptacle for a setting tool. Preferably, a setting tool can be introduced through the tool opening into the interior of the sleeve and there engage in the receptacle on the inner element. Such a design has the advantage that the inner element can be driven directly by the setting tool in order to generate propulsion in the subsoil. Alternatively, the inner element can also be designed in such a way that it has a passage to enable the setting tool to engage directly in a receptacle arranged in the drilling area. For example, the inner element can be hollow at least in sections or have guide rails for the setting tool.

In a further preferred embodiment, the inner element and the sleeve can be connected in the unexpanded state via a predetermined separation point. If the sleeve and the inner element are made of metal, a thin weld seam can be applied in the area of the expansion zone between the inner element and the sleeve, for example. In the case of a sleeve made of plastic, a predetermined separation point can be sprayed on between the inner element and the sleeve, for example. A predetermined separation point offers the advantage of preventing premature expansion of the expansion zone, which can be possible, for example, on hard surfaces due to strong vibrations of the setting tool.

In addition, the person skilled in the art will understand that in some of the embodiments mentioned, several expansion areas and/or several expansion zones can be provided. For example, a sleeve of a system according to the invention can have two expansion zones and an inner element of this system according to the invention can have two expansion areas. The positions of the expansion zones and expansion areas on the sleeve or the inner element are preferably coordinated with one another, which means that during assembly, one expansion area with one expansion zone each causes a corresponding expansion. In the case of several expansion areas and several expansion zones, the person skilled in the art will understand that the individual expansion areas can be designed differently. If the expansion areas are formed from recesses and projections, for example, as described above, a first spreading region may have a recess, while a second spreading region may have a projection.

The previously described embodiments of the fastening element are not exclusive, but can be combined, whereby their technical effects can be combined and interact.

Furthermore, the present object is also achieved by a method according to the invention for mounting a fastening system on a substrate. The method according to the invention is suitable for anchoring a fastening system in a substrate, wherein the fastening system has a sleeve and an inner element. The sleeve also has a holding area, an expansion zone and a drill opening at one of its two ends and a tool opening at the other end, wherein the expansion zone is at least partially arranged between the holding area and the drill opening. The expansion zone has at least one expansion segment. The expansion segment is designed to extend at least partially into the sleeve, as described above in connection with the fastening system. The inner element is at least partially arranged within the sleeve and movable relative to the sleeve. The inner element has a drilling area and an expansion area, wherein the drilling area has at least one cutting element and the drilling area protrudes at least partially from the drill opening of the sleeve.

The method comprises driving in the at least one cutting element of the inner element and simultaneously moving the sleeve along with the movement of the inner element until the holding region of the sleeve opposes a force to further moving the sleeve along, as well as further driving the inner element into the substrate, thereby generating a relative movement between the inner element and the sleeve, and simultaneously spreading the spreading zone of the sleeve with the spreading region of the inner element by the relative movement.

The fastening system used in the method according to the invention for assembly can be one of the fastening systems described above. If a fastening system is used for the assembly of an insulating material, Ensure that the substrate includes both an anchoring base and the insulation material, so that the fastening system is first driven into the insulation material and then into the anchoring base.

Furthermore, the present object is also achieved by a method according to the invention for producing a fastening system for mounting on a substrate. The method according to the invention comprises providing a plurality of embossing and/or punching tools and providing a sleeve blank, wherein the sleeve blank has a substantially cylindrical shape, and providing an inner element, wherein the inner element has a drilling area and a spreading area and wherein the drilling area has at least one cutting element arranged thereon. A section of the inner element is placed in the sleeve blank and at least a section of the sleeve blank is pressed circumferentially onto the section of the inner element, thereby forming a spreading zone in the pressed section. The section of the inner element that is placed in the sleeve blank has at least part of the spreading area. The person skilled in the art will understand that the fastening system can also be joined by rolling in addition to pressing using embossing and/or punching tools without deviating from the teaching of the present invention.

The essential advantage offered by the manufacturing method according to the invention is the relative arrangement of a sleeve and an inner element, wherein the drilling region can be arranged at least partially outside the sleeve and the expansion region of the inner element is arranged at least partially inside the sleeve.

In a preferred embodiment of the manufacturing method according to the invention, the expansion region of the inner element is conically shaped and the circumferential pressing of the section of the sleeve blank takes place on the conically shaped expansion region of the inner element.

In a further preferred embodiment, the circumferential pressing of a section of the sleeve blank further comprises the creation of at least one predetermined separation point in the expansion zone formed by the pressing. The expansion zone can then be expanded, for example, by separating the predetermined separation point be possible. The formation of the predetermined separation point advantageously takes place directly when the expansion zone is formed by the embossing or punching tools that form the expansion zone on the inner element, so that the fastening system can be produced in as few steps as possible. Furthermore, the circumferential pressing preferably forms several predetermined separation points, in a preferred example three predetermined separation points. Preferably, the several predetermined separation points are located circumferentially around the entire circumference of the sleeve, preferably in a symmetrical manner. In a case of three predetermined separation points, one predetermined separation point can be located after one third of the circumference.

The previously described embodiments of the manufacturing method of the fastening element are not exclusive, but can be combined, whereby their technical effects can be combined and interact.

The accompanying drawings illustrate the fastening system according to the invention and the assembly method according to the invention and the manufacturing method according to the invention using exemplary embodiments in comparison with the prior art. They show:

Figure ia,b,c show cross sections of a fastening system according to the invention according to an exemplary embodiment, wherein (a) shows a sleeve according to the invention, (b) an inner element according to the invention and (c) a composite fastening system,

Figure 2 Illustration of an assembly process of a fastening system according to the embodiment of Figure i, showing (a) an initial position of a fastening system in front of a substrate, (b) the creation of a blind hole in the substrate and simultaneous advance of the fastening system and (c) the spreading of the expansion zone of the sleeve of the fastening system by further advance of the fastening system, Figure 3 Cross section of a fastening system according to the invention according to another exemplary embodiment with a holding plate for an insulation board,

Figure 4a,b,c Schematic representation of a manufacturing process of a fastening system according to the invention, wherein (a) shows an initial state at the beginning of the manufacturing process with embossing and/or punching tools in the initial position, (b) shows an intermediate step during the manufacturing process with embossing and/or punching tools in a state pressed into a sleeve blank and (c) shows the end of the manufacturing process in which the embossing and/or punching tools have returned to the initial position. In all three drawing components, a top view and a cross-sectional view are shown,

Figure 5 Schematic representation of another embodiment of the fastening system, wherein (a) shows a side view, (b) and (c) cross-sectional views and (d) a detailed view.

Figure i shows cross sections of a fastening system too according to the invention according to an exemplary embodiment. The fastening system too according to the invention has a sleeve no and an inner element 150. The sleeve 110 is shown as an example in Figure 1 (a). The sleeve 110 forms a hollow cylinder 120 and has two open ends 125a, 125b, wherein one end 125a is referred to as the drilling opening and the other end 125b is referred to as the tool opening. In the embodiment shown here, the drilling opening is located at the end 125a (first end). Furthermore, the sleeve has an expansion zone 130 at the first end 125a. At the end 125b at which the tool opening is located (second end), the sleeve has a holding region 140. In the embodiment from Figure 1 (a), the holding region 140 is formed as a projection that runs circumferentially around the second end 125b of the sleeve. The projection is suitable for resting on a substrate. The expansion zone 130 of the sleeve 110 has several predetermined separation points (not shown in the picture) which separate when the expansion zone 130 is expanded and enable the expansion zone 130 to be expanded. Figure 1 (b) shows an inner element 150 of the fastening system 100 according to the invention. The inner element 150 has a spreading region 180 and a drilling region 170. In the embodiment shown in Figure 1 (b), the spreading region 180 is conical. The drawing shows a preferred embodiment in which the drilling region 170 has a larger diameter than the spreading region 180. In addition, the region 160 between the drilling region 170 and the spreading region 180 has a diameter that is smaller than both the outer diameter of the drilling region 170 and the maximum outer diameter of the spreading region 180. This makes it possible for the spreading zone 130 to be pressed, for example, onto the region 160 between the drilling region 170 and the spreading region 180 during the manufacture of the fastening system 100. In other words, the region 160 between the drilling region 170 and the expansion region 180 forms a trough 160 and the unspread expansion zone 130 of the sleeve 110 can engage in the trough 160.

Figure 1 (c) shows the fastening system 100 according to the invention, consisting of the sleeve 110 from Figure 1 (a) and the inner element 150 from Figure 1 (b) located at least partially within the sleeve 110. It can be seen that the maximum outer diameter of the drilling area 170 of the inner element 150, i.e. the diameter that determines the inner diameter of the blind hole, is essentially equal to the outer diameter of the sleeve 110 (without taking the holding area into account). This makes it possible for the expansion area 180 of the inner element to guide the sleeve 110 during advance into the ground and for the sleeve 110 to slide into the blind hole until the holding area 140 of the sleeve 110 hits the ground. A further advance of the inner element 150 into the ground then leads to a relative movement between the inner element 150 and the sleeve 110 and thus to a spreading of the spreading zone 130 by the spreading region 180 of the inner element 150.

Figure 2 shows an illustration of an assembly process of a fastening system 100 according to the embodiment of Figure 1. Here, (a) shows an initial position of a fastening system 100 which is located in front of a substrate 200. That is, Figure i (a) shows the state before the start of the assembly process when providing the fastening system 100.

By penetrating the drilling area into the subsoil, a blind hole is created, which is shown in Figure 3 (b). At the same time as the blind hole is created, the inner element 150 is driven into the blind hole that is being formed. It is clear to the person skilled in the art that either the inner element is already in a position in which the expansion region 180 of the inner element 150 meets the expansion zone 130 of the sleeve 110 and the sleeve 110 is immediately carried along with a movement of the inner element 150 into the subsoil, or the inner element is in a different position, so that the inner element 150 initially moves relative to the sleeve 110 until the expansion region 180 of the inner element 150 meets the expansion zone 130 of the sleeve 110. The expansion zone 130 serves as a barrier for the expansion region 180 and prevents further relative movement. As a result, the sleeve 110 is carried along by the impact of the expansion region 180 of the inner element 150 on the expansion zone 130 of the sleeve as the inner element 150 experiences further propulsion into the ground 200.

As soon as the sleeve 110 has been carried along with the inner element 150 to such an extent that the holding region 140 hits the substrate 200 and rests on it, this support counteracts any further carrying of the sleeve 110 with the inner element 150 with a force that results in the sleeve 110 not moving further into the blind hole. If the inner element 150 experiences a sufficiently large advance as a result of the drilling region 170 being driven into the substrate, the inner element 150 begins to move again relative to the sleeve 110, with the expansion region 180 gradually penetrating the expansion zone 130 and thereby expanding the expansion zone 130. As a result of the expansion, material of the expansion zone 130 of the sleeve 110 is forced outwards against the walls of the blind hole in the substrate. This displacement of the expansion zone 130 of the sleeve 110 leads to friction between the expanded expansion zone 130 of the sleeve 110 and the walls of the blind hole, whereby a sufficiently high anchoring force of the fastening system 100 in the substrate 200 is generated. When the material of the expansion zone 130 of the sleeve 110 is displaced, an undercut can be generated, for example, which further increases the anchoring force. This is particularly preferred if the expansion zone 130 of the sleeve 110 is at least partially is made of metal. In another embodiment, the displacement of the expansion zone 130 of the sleeve 110 can be achieved by squeezing the expansion zone 130 against the walls of the blind hole. This is particularly preferred if the expansion zone 130 of the sleeve 110 is made of plastic.

Figure 3 shows a cross section of a fastening system according to the invention according to another exemplary embodiment with a holding plate for an insulation board. The substrate in this case consists of an anchoring base 500 and an insulation board 550.

The fastening system in Figure 3 has a sleeve which has a substantially cylindrical element 420. At a front end of the cylindrical element 420 there is an expansion zone 430 and a drilling opening through which an inner element of the fastening system partially protrudes. While an expansion region 480 of the inner element lies within the cylindrical element 420 of the sleeve, a drilling region 470 of the inner element is located outside the drilling opening of the sleeve. At a rear end, the cylindrical region 420 has a holding region designed as a holding plate 440. This holding plate 440 is adapted to fasten an insulation panel 550 to the anchoring base 500 when the fastening system shown in Figure 3 is mounted.

The functionality of the fastening system from Figure 3 is similar to the fastening system from Figure 1. However, the holding area is designed as a holding plate 440 for an insulation board. As soon as the holding plate hits the insulation board of the substrate, the support of the holding plate on the insulation board counteracts further penetration of the sleeve into the substrate with a force that causes the expansion area of the inner element to expand as the inner element is pushed further into the substrate.

Figure 4 shows an illustration of a manufacturing process of a fastening process according to the invention. Figure 4 (a) shows exemplary stamping and punching tools ooa-f which are suitable for circumferentially pressing a sleeve blank and thereby creating an expansion zone 630 in the pressed-in section of the sleeve. The person skilled in the art will understand that the stamping and/or Punching tools ooa-f can, when pressing the sleeve in all its circumference, press the outer wall of the sleeve into the interior of the sleeve and can also cut into the outer walls. By cutting, one or more predetermined separation points 635 can be created, for example.

Figure 4 (a) shows in the upper part of the drawing a top view of the embossing and/or punching tools ooa-f arranged in a circle around a sleeve blank with an inserted inner element. In this view one can see three cutting elements 675 of the drilling area 670 of the inner element as well as the expansion zone 630 in the blank state and the holding area 640. A cross section along the line A-A in the upper part of the drawing is shown in the lower part of the drawing. In the cross section one can see how the embossing and/or punching tools can engage the front area of the sleeve (i.e. at the end that has the drilling opening) to form an expansion zone 630. In Figure 4 (a) the embossing and/or punching tools 700a-f are in the starting position.

Figure 4 (b) shows the state during the manufacturing process in which the stamping and/or punching tools 700a-f are pressed onto the front area of the sleeve blank to form the expansion zone. Again, the upper part of the drawing shows a plan view and the lower part a cross-section along the line A-A.

Figure 4 (c) shows the state at the end of the manufacturing process, i.e. after the embossing and/or punching tools 700a-f have pressed in the front part of the sleeve blank to form the expansion zone 630. The embossing and/or punching tools 700a-f are now back in their starting position. It can be seen in Figure 4 (c) that the embossing and/or punching tools 700a-f have formed predetermined separation points 635 in the area of the expansion zone 630. At the predetermined separation points 635, the embossing and/or punching tools 700a-f have displaced the material of the sleeve blank in such a way that depressions have formed in which the material is tapered and can tear open when the expansion area of the inner element is pressed against the expansion zone during assembly. Again, the upper part of the drawing shows a top view and the lower part a cross section along the line AA. One of the advantages of the described manufacturing method is that the expansion zone 630 is pressed onto the inner element, which enables the inner element to be arranged within the sleeve. Due to the areas of the inner element with the different diameters, this results in the expansion zone of the sleeve engaging in the area between the drilling area 670 and the expansion area of the inner element (cf. recess 160 in Figure 1 (b)).

Those skilled in the art will understand that the holding region 640 can also be formed by embossing and/or punching tools. This can be done before, after or simultaneously with the formation of the expansion zone. Alternatively, the holding region 640 can be formed before or after the formation of the expansion zone via a machining process.

Figure 5 shows a schematic representation of another embodiment of the fastening system, wherein (a) shows a side view, (b) and (c) cross-sectional views and (d) shows a detailed view.

The side view of Figure 5 (a) shows an exemplary sleeve 720 of a fastening system according to another embodiment. The sleeve 720 has a first end and a second end 725b. The sleeve 720 has an expansion zone 730 at the first end. The second end 725b provides a tool opening. The sleeve 750 also has a holding area. In the embodiment shown, the holding area is shown at 740 as a change in diameter in the form of a thickening. If this thickening penetrates into the substrate during the assembly process, it applies a force to the further pulling of the sleeve into the substrate, whereby further driving of the fastening system into the substrate causes the relative movement between the inner element 750 and the sleeve 720. The person skilled in the art will recognize that in addition to a thickening as shown at 740 in Figure 5, a holding area in the form of a projection or holding plate can also be provided. Instead of position 740 from Figure 5, the holding area can also be located at a different position between the spreading zone 730 and the tool opening 725b, for example near the tool opening 725b. For example, the holding area can be designed as a circumferential projection or holding plate around the tool opening 725b. The positioning of the holding area can vary depending on the application. In the embodiment shown in Figure 5, the expansion zone 730 has a plurality of expansion segments 735. At least partially located within the sleeve 720 is an inner element 750, the drilling region 770 of which protrudes from the sleeve 720 at the first end of the sleeve 720, as shown in Figure 5 (a).

The expansion segments 735 of the expansion zone 730 can be designed as tabs, for example, as shown in Figure 5 (b). The expansion segments 735 partially protrude into the sleeve 720. In Figures 5 (b) and (c), this is shown in that the tab-shaped expansion segments 735 have the free end of the tab in the direction of the tool opening 725b, which protrudes into the sleeve 720.

Figure 5 (d) shows a detailed view of the front section of the system from Figure 5 (a). This detailed view shows how the expansion segments 735 protrude into the interior of the sleeve 720. The inner element 750 has an expansion region 780, which in this embodiment has a recess. The recess and the expansion segments 735 interact when the inner element 750 moves relative to the sleeve 720. To do this, the expansion segments 735 engage in the recess. If the inner element 750 is moved from the tool opening 725b of the sleeve 720 in the direction of the drilling opening, the expansion segments 735 are deformed and at least partially pressed out of the sleeve 720. When the fastening system is mounted in a substrate, the expansion segments 735 are pressed against the boundaries of the hole created by the drilling area 770 of the inner element 750 in order to enable anchoring of the fastening system.

While Figure 5 shows an embodiment in which the expansion region 780 has a circumferential recess, the person skilled in the art will recognize that instead of a circumferential recess, a projection can also be provided which can interact with the expansion segments 735. This projection can be pressed against the expansion segments 735 during the relative movement and can thereby deform them and thus at least partially push them out of the sleeve 720.

Figure 5 (c) shows the fastening system in a cross-section from a different angle than Figure 5 (b). In this cross-sectional view, a gap 725. This gap 725 represents an interruption in the sleeve 720. In such a case, the sleeve can be produced, for example, by forming a metal sheet, the metal sheet being rolled into the shape of a cylinder, the metal sheet forming the outer surface of the cylinder. The gap 725 in this case designates the point at which the rolled-up sections of the metal sheet meet. If the sleeve is produced in this way, the expansion segments can, for example, preferably be designed as tabs that can be cut or punched into the metal sheet before the metal sheet is formed.

The above description contains exemplary embodiments of one or more embodiments of the invention. Of course, it is not possible to describe every conceivable combination of the components and methods according to the invention in the aforementioned exemplary embodiments. Rather, a person skilled in the art will recognize that there are numerous other combinations of further embodiments. Accordingly, the described exemplary embodiments are intended to include all such other combinations, modifications, variations and embodiments that fall within the scope of the appended claims.

Claims

claims 1. A fastening system (100) for mounting on a substrate (200, 500), the fastening system (100) comprising a sleeve (110, 730) and an inner element (150, 750), the sleeve (110, 720) comprising a holding region (140, 440, 640, 740), an expansion zone (130, 430, 630, 730) and a drilling opening (125a) at one of its two ends and a tool opening (125b, 725b) at the other end, the expansion zone (130, 430, 630, 730) being arranged at least partially between the holding region (140, 440, 640, 740) and the drilling opening (125a), and the expansion zone (130, 430, 630, 730) has at least one expansion segment (735) which is designed to extend at least partially into the sleeve (110, 720), and wherein the inner element (150, 750) is at least partially arranged within the sleeve (110, 720) and is movable relative to the sleeve (110, 720), and wherein the inner element (150, 750) has a drilling region (170, 470, 670, 770) and an expansion region (180, 480, 780), wherein the drilling region (170, 470, 670, 770) has at least one cutting element and the drilling region (170, 470, 670, 770) protrudes at least partially from the drilling opening (125a) of the sleeve (110, 720) and the expansion region (180, 480, 780) of the inner element (150, 750) is adapted to expand the expansion zone (130, 430, 630, 730) of the sleeve (110, 720) upon movement of the expansion region (180, 480, 780) in the sleeve (110, 720) and relative to the sleeve (110, 720) in the direction from the tool opening (125b, 725b) to the drill opening (125a). 2. The fastening system according to claim 1, wherein the expansion zone (130, 430, 630, 730) of the sleeve (110, 720) in the unspread state has a first outer diameter and the drilling region (170, 470, 670, 770) of the inner element (150, 750) has a maximum second outer diameter and wherein the maximum second outer diameter and the first outer diameter are equal or the maximum second outer diameter is larger than the first outer diameter. 3. The fastening system according to one of the preceding claims, wherein the expansion region (180, 480, 780) of the inner element (150, 750) has at least one recess or at least one projection, and wherein the at least one expansion segment (735) is designed to cooperate with the at least one recess or the at least one projection during the movement of the inner element (150, 750) relative to the sleeve (110, 720), whereby the at least one expansion segment (735) is at least partially pressed out of the sleeve (110, 720). 4. The fastening system according to claim 3, wherein the at least one expansion segment (735) forms a tab which, in the unspread state, projects into the sleeve (110, 720). 5. The fastening system according to one of the preceding claims, wherein the inner element (150, 750) is at least partially formed from a metal. 6. The fastening system according to claim 5, wherein the drilling region (170, 470, 670, 770) of the inner member (150, 750) is at least partially formed from a metal. 7. The fastening system according to one of the preceding claims, wherein the sleeve (110, 720) is at least partially formed from a metal or a plastic. 8. The fastening system according to one of the preceding claims, wherein the holding region (140, 440, 640, 740) of the sleeve (110, 720) is formed by an enlargement of a diameter of the sleeve. 9. The fastening system according to one of the preceding claims, wherein the inner element (150, 750) has a receptacle (190) for a setting tool (300). io. A method for mounting a fastening system (100) on a substrate (200, 500), the fastening system (100) comprising a sleeve (110, 720) and an inner element (150, 750), the sleeve (110, 720) comprising a holding region (140, 440, 640, 740), an expansion zone (130, 430, 630, 730) and a drilling opening (125a) at one of its two ends and a tool opening (125b, 725b) at the other end, the expansion zone (130, 430, 630, 730) being arranged at least partially between the holding region (140, 440, 640, 740) and the drilling opening (125a), and the expansion zone (130, 430, 630, 730) has at least one expansion segment (735) which is designed to extend at least partially into the sleeve (110, 720), and wherein the inner element (150, 750) is at least partially arranged within the sleeve (110, 720) and is movable relative to the sleeve (110, 720), and wherein the inner element (150, 750) has a drilling region (170, 470, 670, 770) and an expansion region (180, 480, 780), wherein the drilling region (170, 470, 670, 770) has at least one cutting element and the drilling region (170, 470, 670, 770) protrudes at least partially from the drilling opening (125a) of the sleeve (110, 720); and wherein the method comprises the steps of: Driving the inner element (150, 750) into the ground and simultaneously moving the sleeve (110, 720) along with the movement of the inner element (150, 750) until the holding region (140, 440, 640, 740) of the sleeve (110, 720) opposes further movement of the sleeve (110, 720); and further driving the inner element (150, 750) into the ground, whereby a relative movement is generated between the inner element (150, 750) and the sleeve (110, 720), and simultaneously spreading the expansion zone (130, 430, 630, 730) of the sleeve (110) with the expansion region (180, 480, 780) of the inner element (150, 750) by the relative movement.