Fastening system and method for mounting in a substrate

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

[0001] Fastening system and method for mounting in a substrate

[0002] The present invention generally relates to a fastening system and a method for mounting it in a substrate. Furthermore, the invention also relates to a method for producing a fastening system according to the invention.

[0003] Numerous systems for installation in a substrate are known in the prior art, which enable objects to be fastened 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 inserting the dowel sleeve into the blind hole, the fastening element is screwed into the dowel sleeve and typically anchored by deforming the dowel sleeve. Such known systems can be used, for example, to fasten insulating materials relative to a substrate or to attach heavy loads to a substrate.

[0004] However, the known systems have the disadvantage that the installation process consists of multiple steps. Typically, at least three steps are required to anchor the system in the substrate: first, creating a blind hole, second, placing a dowel sleeve in the blind hole, and third, the relative movement between a fastener 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 vary for each system.For example, in the case of a system for fastening an insulation material to a substrate, only an anchor sleeve can first be inserted into the blind hole and then a fastener can be inserted into the anchor sleeve, whereby the fastener deforms at least a portion of the anchor sleeve in order to create a sufficient anchoring effect in the substrate. The load-bearing capacity is generated by the friction of the deformed portion of the sleeve against the walls of the blind hole. On the other hand, in the case of a typical heavy-duty anchor, a system consisting of an anchor sleeve and a fastener arranged in the anchor sleeve is inserted into the blind hole. The fastener is then rotated relative to the anchor sleeve in order to partially withdraw it from the anchor sleeve, whereby the relative movement spreads a portion of the anchor 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.

[0005] In addition, known assembly processes typically require multiple tools: first, a tool to create the blind hole, and second, at least one other tool for the relative movement of the fastener and the anchor sleeve. In the case of the aforementioned system for fastening insulation materials, a drill is typically used to create the blind hole and, for example, a screwdriver is used to insert the fastener into the anchor sleeve. While in the case of the aforementioned system for fastening heavy loads, a drill is also used to create the blind hole, along with a wrench or socket wrench. In some cases, additional tools may also be required to remove drilling dust generated during the creation of the blind hole.

[0006] The object of the present invention is therefore to overcome the aforementioned disadvantages and to provide a system that simplifies the assembly process.

[0007] 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 each of which is 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 assembly to 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 region and an expansion zone. The expansion zone has at least one expansion segment which 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 may also be possible for the at least one expansion segment to initially extend outward from the sleeve in the initial state and only be pushed 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.

[0008] Furthermore, the sleeve has a drill opening at a first of its two ends and a tool opening at the other end. During the assembly process, the holding region exerts a force at a specific 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 region can be designed. The holding region can generally be formed by the diameter of the sleeve increasing in a specific section. For example, the holding region can be realized as a projection formed circumferentially at the first end. Likewise, the holding region can be formed by a thickening of the sleeve, wherein a thickening of the sleeve can be formed either by a region with increased wall thickness or by shaping the sleeve, i.e. the sleeve can have a bulge, for example.Further embodiments may comprise a holding region in the form of a holding plate, for example for holding insulation material, or in the form of a conical or step-like enlarging section. With reference to further preferred embodiments, further possibilities for designing the holding region 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 region and the drill opening. The sleeve can essentially be formed by a hollow cylinder, with the drill opening and the tool opening then being located, for example, on the cover and the base of the hollow cylinder, respectively.

[0009] During assembly, the inner element is at least partially arranged within the sleeve and 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. Furthermore, the inner element has a drilling area and an expansion area. The drilling area has at least one cutting element. The at least one cutting element is suitable for cutting into the substrate when the fastening system is used. The drilling area protrudes at least partially from the drill opening in 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 those 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 configured to enable chiseling. For example, the at least one cutting element of the drilling area can be adapted for cutting into a substrate, or the at least one cutting element can be adapted for chiseling into a hard substrate.

[0010] 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 drill 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 drill 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 area can cause the expansion zone to expand due to the expansion area. Since the holding area exerts a force against further penetration of the sleeve into the substrate, the holding area can be designed as a setting depth limiter.

[0011] The expansion zone can be expanded, for example, using at least one expansion segment. In the following description, particularly the description of the figures, the functionality of such expansion segments is explained using multiple expansion segments; however, within the scope of the invention, only one expansion segment can also be used. The expansion segments are designed such that they extend into the interior of the sleeve during installation, particularly when the expansion zone of the sleeve is located underground. The movement of the inner element pushes the expansion segments at least partially out of the sleeve, thus expanding the expansion zone.

[0012] The advantage that the described fastening system offers over the prior art is that the fastening system can be mounted to a substrate in a single step. For this purpose, 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 along 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 exerting a force opposing the further penetration.Within the scope of the present invention, the holding area can be designed in a variety of ways. One possibility is for the holding area to have a projection that prevents the holding area from penetrating the ground. Other designs are also possible, and examples of such other designs are described further below. The force that the holding area opposes to further penetration of the sleeve into the ground is directed counter to the forward propulsion and prevents the sleeve from being carried further along with the movement of the inner element, 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 spreads the expansion zone of the sleeve, thus creating a force-locking anchoring of the sleeve in the ground.

[0013] Thus, the creation of a blind hole in the subsoil, the insertion of the sleeve into the subsoil, and the expansion of the sleeve's expansion zone (i.e., anchoring) all take place in a single step by driving the inner element into the subsoil. Furthermore, the complete installation process of the fastening element in the subsoil requires only a single setting tool that is capable of driving the 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 installing a fastening system, but also reduces the number of tools required.

[0014] Preferred embodiments of the fastening system according to the invention are described below.

[0015] In the unspread state, the expansion zone of the sleeve has a first outer diameter, and the drilling region of the inner element has a maximum second outer diameter. In a preferred embodiment, the drilling region is substantially pointed at its foremost end, which first impacts the ground, and widens towards its rear end. As a result, the outer diameter of the drilling region changes depending on the distance from the tip. Furthermore, the at least one cutting element of the drilling region can be designed as one or more projections formed on the circumferential surface of the drilling region, which projections do not necessarily extend over the entire circumference. Therefore, the term "maximum outer diameter" is used below. In a preferred embodiment, this is the diameter of the largest circumferential circle of the drilling region.To distinguish it from the outer diameter of the sleeve's expansion zone, 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 retaining area prevents further penetration.

[0016] Those skilled in the art will understand that equality of diameters in this context means that the diameters can be substantially equal. "Substantially equal" 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 the blind hole—in particular by being driven along with the movement of the inner element—but also that the expansion of the sleeve's expansion zone can provide sufficiently strong anchoring of the sleeve in the blind hole.

[0017] 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, such that rotating 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 subsurface without impairing the ability of the inner element to carry the sleeve along during advance into the subsurface. 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 impact the expansion zone as the inner element advances and allows the expansion zone to gradually expand as the inner element advances further.In other preferred embodiments, however, the expansion region can also be designed in a step-like manner, wherein the steps have a larger outer diameter with increasing distance from the drilling region. In yet other preferred embodiments, the expansion region can also be designed as a thread or as knurling. Consequently, the inner element preferably has a shape with different outer diameters. The drilling region has the largest outer diameter. The expansion region has an outer diameter that varies depending on the distance from the drilling region. Preferably, the outer diameter of the expansion region is largest at the point furthest from the drilling region. However, this largest, i.e. maximum, outer diameter of the expansion region is preferably smaller than the outer diameter of the drilling region.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 creates a kind 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 grip the inner element in the area of ​​the trough. This is further illustrated by reference to the attached drawings, particularly Figures 1 and 4.

[0018] 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, wherein 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. Those skilled in the art will recognize that geometric shapes other than a cylinder are also possible and can be combined with recesses or projections.

[0019] During the described movement of the inner element relative to the sleeve, the at least one expansion segment of the sleeve can interact with the at least one recess or the at least one projection such 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 such that a section of the expansion segment projects into the sleeve, wherein this section can also be referred to as the free end of the expansion segment. The other end of the expansion segment can be fastened to the sleeve. During 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 during a movement of the inner element, whereby the expansion segment is deformed.During this deformation, a central section located between the fixed end and the free end can be deformed and displaced from the sleeve. In this way, the expansion segment is deformed and pushed out of the sleeve against the substrate, enabling anchoring of the sleeve. This anchoring occurs during the installation process by a movement of the inner element relative to the sleeve toward the substrate, thus simplifying the installation process.

[0020] 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. Because of 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 remain independent of the rotational position. Furthermore, it should be noted that a rotationally symmetrical recess or a rotationally symmetrical projection can be used to spread a plurality of expansion segments, for example if the plurality of 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.

[0021] 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 region can have a plurality of cutting elements, each of which is designed as cutting edges. Preferably, these plurality of cutting edges are arranged on the surface of the drilling region such that they extend radially outwards along the surface from the center of the surface (i.e. the tip of the drilling region). Preferably, three cutting elements are provided, which are designed as cutting edges. More preferably, the three cutting edges are at 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, at least partially forming the drilling area—in particular 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 of hardened steel, for example. Alternatively, the at least one cutting element can also be formed by applying sintered material to a drilling area made of stainless steel.

[0022] 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, where expanding a metallic expansion zone of the sleeve creates an undercut in the substrate 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 attaching insulation materials in order to avoid thermal bridges. Forming the sleeve from a metal is particularly preferred—but not limited to—for embodiments in which the expansion zone is formed from at least one expansion segment and the expansion region of the inner element has at least one recess and / or at least one projection.If the at least one expansion segment, which in this case is made of metal, is deformed by the movement of the inner element and is thereby pushed out of the sleeve, the deformation of the expansion segment made of metal causes a particularly advantageous anchoring in the ground, whereby even heavy loads can be carried.

[0023] In further preferred embodiments, the sleeve and / or the inner element are designed to allow the removal of drilling dust that arises during assembly. The 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 laterally in the sleeve through which drilling dust that arises can reach 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 these one or more additional openings to remove the drilling debris.

[0024] The channel can be formed within the sleeve. In another preferred embodiment, the channel can be formed on an outer side of the sleeve. Alternatively, the channel for removing drilling dust can also be formed within the inner element. If the channel is formed within 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 removal of drilling dust if the setting tool is equipped with a suction device.

[0025] In the case of one or more additional openings or a channel, the drilling region of the inner element can preferably be designed such that the drilling region forms a suction drill to which a suction device of a setting tool can be connected. Particularly preferably, the inner element has a receptacle that 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. Preferably, the setting tool is designed such that it is adapted to be able to engage in the receptacle and there to establish a connection between a suction device of the setting tool and the path formed in the inner element.

[0026] One or more additional openings or a channel for removing drilling debris offer the advantage of preventing the debris from accumulating in the drilling area and preventing advancement of the inner element and / or sleeve. During advancement of the inner element, the debris can enter the interior of the sleeve or the channel and be removed from there.

[0027] The holding region is adapted to prevent further penetration of the sleeve into the ground by opposing further penetration of the sleeve into the ground with a force. Thus, as the inner element is driven further into the ground, the holding region causes the expansion zone to expand. Within the scope of the present invention, several examples of the design of such a holding region are described. Generally, the holding region can be formed by the diameter of the sleeve increasing in one section. However, a 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 region can be designed circumferentially as a projection on the sleeve. In a preferred embodiment, however, the holding region of the sleeve can also be designed as a holding plate.A retaining plate can form a flat ring, an annular projection, or an annular disc that is arranged circumferentially on the sleeve. Preferably, the retaining plate can be arranged at the end of the sleeve that has the tool opening. Such a retaining plate is particularly suitable for use with a multi-layer substrate that comprises, for example, an anchoring base and an insulating material. In this case, the retaining plate can serve to attach the insulating material to the anchoring base. Those skilled in the art will understand that an additional component, such as a waterproofing membrane resting on the insulating material, can also be held relative to the substrate by the retaining plate.

[0028] In a further preferred embodiment, the sleeve can, in addition to a first holding area, also have a further holding area which is designed as a holding plate. In this case, the further holding area designed as a holding plate serves merely to hold an insulating material relative to the substrate, while the first holding area applies the force at a certain point during installation to prevent further penetration of the sleeve into the substrate and thus to cause 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 inserted 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 to generate advancement in the subsurface. Alternatively, the inner element can also be designed to have a passage to allow 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.

[0029] 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, for example, in the area of ​​the expansion zone between the inner element and the sleeve. In the case of a sleeve made of plastic, a predetermined separation point can be sprayed on between the inner element and the sleeve. A predetermined separation point offers the advantage of preventing premature expansion of the expansion zone, which can occur, for example, on hard substrates due to strong vibrations of the setting tool.

[0030] Furthermore, those skilled in the art will understand that in some of the aforementioned embodiments, multiple expansion regions and / or multiple 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 regions. The positions of the expansion zones and expansion regions on the sleeve or the inner element are preferably coordinated with one another, which means that during assembly, each expansion region with one expansion zone brings about a corresponding expansion. In the case of multiple expansion regions and multiple expansion zones, those skilled in the art will understand that the individual expansion regions can be designed differently.If the spreading regions are formed, for example, from depressions and projections as described above, a first spreading region may have a depression, while a second spreading region may have a projection.

[0031] The previously described embodiments of the fastening element are not exclusive, but can be combined, whereby their technical effects can be combined and interact.

[0032] Furthermore, the present object is also achieved by a method according to the invention for mounting a fastening system to 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. Furthermore, the sleeve has a holding region, 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 arranged at least partially between the holding region 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 arranged at least partially within the sleeve and is movable relative to the sleeve.The inner element has a drilling region and a spreading region, wherein the drilling region has at least one cutting element and the drilling region protrudes at least partially from the drilling opening of the sleeve.

[0033] The method comprises driving in the at least one cutting element of the inner element and simultaneously carrying the sleeve along with the movement of the inner element until the holding region of the sleeve opposes a force to further carry the sleeve along, as well as further driving of the inner element into the ground, whereby a relative movement between the inner element and the sleeve is generated, and simultaneously spreading the expansion zone of the sleeve with the expansion region of the inner element by the relative movement.

[0034] The fastening system used in the installation method according to the invention can be one of the fastening systems described above. If a fastening system is used for installing an insulating material, it is understood that the substrate comprises both an anchoring base and the insulating material, so that the fastening system is first driven into the insulating material and then into the anchoring base.

[0035] 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 stamping 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 region and an expansion region, and wherein the drilling region 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 circumferentially pressed onto the section of the inner element, thereby forming an expansion zone in the pressed-in section. The section of the inner element that is placed in the sleeve blank has at least part of the expansion region.The person skilled in the art will understand that the fastening system can be joined by rolling in addition to being pressed by means of embossing and / or punching tools, without deviating from the teachings of the present invention.

[0036] 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.

[0037] 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.

[0038] In a further preferred embodiment, the circumferential press-in of a section of the sleeve blank further comprises creating at least one predetermined separation point in the expansion zone formed by the press-in. Spreading of the expansion zone can then be possible, for example, by separating the predetermined separation point. Advantageously, the formation of the predetermined separation point occurs directly during formation of the expansion zone by the embossing or punching tools that form the expansion zone on the inner element, so that the fastening system can be manufactured in as few steps as possible. Furthermore, the circumferential press-in preferably forms a plurality of predetermined separation points, in a preferred example three predetermined separation points. Preferably, the plurality of 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.

[0039] The previously described embodiments of the manufacturing method of the fastener are not exclusive, but can be combined, whereby their technical effects can be combined and interact.

[0040] The accompanying drawings illustrate the fastening system according to the invention, as well as the assembly method and the manufacturing method according to the invention, using exemplary embodiments in comparison to the prior art. They show:

[0041] Figures 1a,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,

[0042] Figure 2 Illustration of an assembly process of a fastening system according to the embodiment of Figure i, wherein (a) a starting 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,

[0043] 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 pressed into a sleeve blank, and (c) shows the completion of the manufacturing process, in which the embossing and / or punching tools have returned to the initial position. In each of the three drawing components, a top view and a cross-sectional view are shown.

[0044] 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.

[0045] Figure 1 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 comprises 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 drill opening and the other end 125b is referred to as the tool opening. In the embodiment shown here, the drill 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 where 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 running 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 a plurality of predetermined separation points (not shown) that separate when the expansion zone 130 is expanded, enabling the expansion zone 130 to expand. Figure 1 (b) shows an inner element 150 of the fastening system 100 according to the invention. The inner element 150 has an expansion region 180 and a drilling region 170. In the embodiment shown in Figure 1 (b), the expansion region 180 is conical. The drawing shows a preferred embodiment in which the drilling region 170 has a larger diameter than the expansion region 180. In addition, the region 160 between the drilling region 170 and the expansion 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 expansion region 180.This makes it possible for the expansion zone 130 to be pressed, for example, onto the region 160 between the drilling region 170 and the expansion 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 recess 160, and the unspread expansion zone 130 of the sleeve 110 can engage into the recess 160.

[0046] 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), which is located at least partially within the sleeve 110. It can be seen that the maximum outer diameter of the drilling region 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 region into account). This enables the expansion region 180 of the inner element to guide the sleeve 110 during advance into the subsurface, and the sleeve 110 to slide into the blind hole until the holding region 140 of the sleeve 110 hits the subsurface. Further propulsion of the inner element 150 into the subsoil then leads to a relative movement between the inner element 150 and the sleeve 110 and thereby to a spreading of the expansion zone 130 by the spreading area 180 of the inner element 150.

[0047] 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 located in front of a substrate 200. This means that Figure 1 (a) shows the state before the start of the assembly process when the fastening system 100 is provided.

[0048] By penetrating the drilling area into the subsurface, a blind hole is created, as shown in Figure 3 (b). Simultaneously with the creation of the blind hole, the inner element 150 is driven into the forming blind hole. It will be clear to a 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 subsurface, or the inner element is in a different position such 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.

[0049] 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 ground 200 and rests on it, this support counteracts any further movement of the sleeve 110 with the inner element 150 with a force that prevents the sleeve 110 from 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 ground, the inner element 150 begins to move again relative to the sleeve 110, with the expansion region 180 successively 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 ground.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, thereby generating a sufficiently high anchoring force of the fastening system 100 in the substrate 200. During the displacement of the material of the expansion zone 130 of the sleeve 110, for example, an undercut can be created, which further increases the anchoring force. This is particularly preferred if the expansion zone 130 of the sleeve 110 is made at least partially 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.

[0050] Figure 3 shows a cross-section of a fastening system according to the invention according to another exemplary embodiment with a retaining plate for an insulation board. The substrate in this case consists of an anchoring base 500 and an insulation board 550.

[0051] The fastening system in Figure 3 comprises a sleeve having a substantially cylindrical element 420. At a front end of the cylindrical element 420 is an expansion zone 430 and a drilled 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 drilled region 470 of the inner element is located outside the drilled 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.

[0052] The functionality of the fastening system shown in Figure 3 is similar to the fastening system shown in 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 contact 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 driven further into the substrate.

[0053] Figure 4 shows an illustration of a manufacturing method for a fastening process according to the invention. Figure 4 (a) shows exemplary stamping and punching tools ooa-f suitable for circumferentially pressing in a sleeve blank and, in the process, creating an expansion zone 630 in the pressed-in section of the sleeve. Those skilled in the art will understand that, during the circumferential pressing in of the sleeve, the stamping and / or punching tools ooa-f can, on the one hand, press the outer wall of the sleeve into the interior of the sleeve and, on the other hand, cut into the outer walls. For example, one or more predetermined separation points 635 can be created by the cutting.

[0054] Figure 4 (a) in the upper part of the drawing shows a plan view of the stamping and / or punching tools 00a-f arranged in a circle around a sleeve blank with an inserted inner element. In this view, three cutting elements 675 of the drilling area 670 of the inner element can be seen, as well as the expansion zone 630 in the blank state and the holding area 640. A cross-section along the line AA in the upper part of the drawing is shown in the lower part of the drawing. The cross-section shows how the stamping and / or punching tools can engage the front area of ​​the sleeve (i.e., the end having the drilling opening) to form an expansion zone 630. In Figure 4 (a), the stamping and / or punching tools 700a-f are in the starting position.

[0055] 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 shows a cross-section along line AA.

[0056] Figure 4 (c) shows the state at the end of the manufacturing process, i.e., after the stamping and / or punching tools 700a-f have pressed in the front part of the sleeve blank to form the expansion zone 630. The stamping and / or punching tools 700a-f are now back in their starting position. Figure 4 (c) shows that the stamping 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 stamping 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 plan view, and the lower part shows a cross-section along line AA.One of the advantages of the described manufacturing method is that the expansion zone 630 is pressed onto the inner element, thereby enabling the inner element to be arranged within the sleeve. Due to the different diameter regions of the inner element, this results in the expansion zone of the sleeve engaging the area between the bore region 670 and the expansion region of the inner element (see recess 160 in Figure 1 (b)).

[0057] Those skilled in the art will understand that the holding region 640 can also be formed using stamping and / or punching tools. This can occur 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 using a machining process.

[0058] Figure 5 shows a schematic representation of another embodiment of the fastening system, wherein (a) shows a side view, (b) and (c) show cross-sectional views and (d) shows a detailed view.

[0059] 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 thickened portion. If this thickened portion penetrates the substrate during the assembly process, it exerts a force opposing the further retraction 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. Those skilled in the art will recognize that in addition to a thickened portion 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 in Figure 5, the holding region can also be located at a different position between the expansion zone 730 and the tool opening 725b, for example, near the tool opening 725b. For example, the holding region can be designed as a circumferential projection or holding plate around the tool opening 725b. The positioning of the holding region can vary depending on the application. In the embodiment shown in Figure 5, the expansion zone 730 has a plurality of expansion segments 735. Located at least partially 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).

[0060] The expansion segments 735 of the expansion zone 730 can, for example, be designed as tabs, as shown in Figure 5 (b). The expansion segments 735 partially protrude into the sleeve 720. In Figures 5 (b) and (c), this is illustrated by the fact that the tab-shaped expansion segments 735 have the free end of the tab in the direction toward the tool opening 725b, which protrudes into the sleeve 720.

[0061] 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. For this purpose, the expansion segments 735 engage in the recess. If the inner element 750 is moved from the tool opening 725b of the sleeve 720 towards the drill 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.

[0062] While Figure 5 shows an embodiment in which the expansion region 780 has a circumferential recess, those skilled in the art will recognize that, instead of a circumferential recess, a projection can also be provided that can interact with the expansion segments 735. This projection can be pressed against the expansion segments 735 during the relative movement, thereby deforming them and thus at least partially pushing them out of the sleeve 720.

[0063] 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 is shown. 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, wherein the metal sheet is rolled into the shape of a cylinder, wherein the metal sheet forms the outer surface of the cylinder. In this case, the gap 725 designates the point at which the rolled 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.

[0064] 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 inventive components and methods in the aforementioned exemplary embodiments. Rather, one skilled in the art will recognize that numerous further combinations of further embodiments exist. Accordingly, the described exemplary embodiments are intended to encompass all such further 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 drill 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 drill 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 arranged at least partially 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 area (170, 470, 670, 770) has at least one cutting element and the drilling area (170, 470, 670, 770) protrudes at least partially from the drilling opening (125a) of the sleeve (110, 720) and the expansion area (180, 480, 780) of the inner element (150, 750) is adapted to the expansion zone (130, 430, 630, 730) of the sleeve (110, 720) upon movement of the expansion area (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 drilling opening (125a) to spread., 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 area (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 the same size 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 formed at least partially 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 formed at least partially from a metal.

7. The fastening system according to one of the preceding claims, wherein the sleeve (110, 720) is formed at least partially 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), wherein the fastening system (100) comprises a sleeve (110, 720) and an inner element (150, 750), wherein the sleeve (110, 720) has a holding region (140, 440, 640, 740), an expansion zone (130, 430, 630, 730) and a drill opening (125a) at one of its two ends and a tool opening (125b, 725b) at the other end, wherein the expansion zone (130, 430, 630, 730) is arranged at least partially between the holding region (140, 440, 640, 740) and the drill opening (125a), and wherein 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 arranged at least partially within the sleeve (110, 720) and is movable relative to the sleeve (110, 720), and wherein the inner element (150, 750) has a drilling area (170, 470, 670,770) and a spreading 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 carrying 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 a force preventing further carrying of the sleeve (110, 720); and further driving the inner element (150, 750) into the ground, thereby generating a relative movement between the inner element (150, 750) and the sleeve (110, 720), and simultaneously spreading the spreading zone (130, 430, 630, 730) of the sleeve (110) with the spreading region (180, 480, 780) of the inner element (150, 750) by the relative movement.

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