Fastening system and method for mounting in a subsoil

Description

[0001] The present invention generally relates to a fastening system and a method for mounting it in a substrate. The invention further relates to a method for manufacturing a fastening system according to the invention.

[0002] Numerous systems for mounting in a substrate are known in the prior art, enabling objects to be fastened relative to the substrate. These known systems are characterized by a multi-step anchoring 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 receive 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 deformation of the dowel sleeve. Such known systems can be used, for example, to fasten insulation materials relative to a substrate or to fasten heavy loads to a substrate.

[0003] However, the known systems have the disadvantage that the installation process consists of several 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, moving a fastener relative to the dowel sleeve to deform the sleeve and thereby create a force-fit connection between the substrate and the fastening system. While creating the blind hole is typically the same for the known systems, the other two steps can differ for each system.For example, in a system for fastening insulation to a substrate, a dowel sleeve may first be inserted into the blind hole, followed by the insertion of a fastener into the sleeve. The fastener deforms at least part of the sleeve to create sufficient anchorage in the substrate. The load-bearing capacity is generated by the friction of the deformed part of the sleeve against the walls of the blind hole. Alternatively, in the case of a typical heavy-duty anchor, a system consisting of a dowel sleeve and a fastener located within the sleeve is inserted into the blind hole. The fastener is then rotated relative to the dowel sleeve to partially withdraw it. This relative movement expands a portion of the sleeve to create an undercut, which provides the necessary 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.

[0004] Furthermore, known installation processes typically require several tools: first, a tool for creating the blind hole, and second, at least one other tool for moving the fastener and the anchor sleeve relative to each other. In the case of the aforementioned system for fastening insulation materials, a drill is generally used to create the blind hole, and, for example, a screwdriver is used to insert the fastener into the anchor sleeve. 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 additionally employed. In some cases, additional tools may also be necessary for removing drilling dust produced during the creation of the blind hole.

[0005] Other fastening systems known in the prior art are described in documents GB 2 310 700 A, EP 1 645 758 A2 and US 2019 / 219084 A1.

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

[0007] This problem is solved 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 manufacturing a fastening system, as described in the independent claims. Preferred and advantageous embodiments are found in the dependent claims and in the following description.

[0008] The fastening system according to the invention is configured for mounting on a substrate. The substrate can be an anchoring base or a multi-layered substrate, for example, consisting of one or more insulating materials and an anchoring base. The fastening system according to the invention comprises a sleeve and an inner element. The sleeve has a holding area and an expansion zone. Furthermore, the sleeve has a drill hole at one of its two ends and a tool opening at the other end. During the installation process, the holding area exerts a force at a specific point during installation to prevent further penetration of the sleeve into the substrate. Within the scope of the present invention, there are various possibilities for how the holding area can be designed. For example, the holding area can be implemented as a projection extending circumferentially at the first end.With reference to further preferred embodiments, additional possibilities for designing the holding area will be shown later. The spreading zone is located at least partially between the holding area and the bore opening. The sleeve can essentially be formed by a hollow cylinder, with the bore opening and the tool opening then being located, for example, on the top and bottom of the hollow cylinder, respectively.

[0009] During assembly, the inner element is at least partially positioned within the sleeve and movable relative to the sleeve. This positioning of the inner element, at least partially within the sleeve, can preferably occur during manufacturing, or alternatively, immediately before assembly. Furthermore, the inner element comprises a drilling area and an expansion area. The drilling area includes at least one cutting element. This at least one cutting element is designed to cut into the substrate when the fastening system is used. The drilling area protrudes at least partially from the borehole 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 it can be located outside the sleeve to allow contact between the drilling area and the substrate during the assembly process.As the expert will recognize, the term "drilling area" is not to be understood as meaning that the drilling area is exclusively limited to drilling processes.

[0010] Rather, the drilling area can also be designed to enable chiseling. For example, at least one cutting element of the drilling area can be adapted for cutting into a substrate, or at least one cutting element can be adapted for chiseling into a hard substrate.

[0011] The expansion zone of the inner element is designed to expand the sleeve's expansion zone when the expansion zone moves within the sleeve and relative to the sleeve in the direction from the tool opening to the borehole, i.e., further towards the substrate during installation. This means that the inner element moves relative to the sleeve during the installation process, and this movement causes the expansion zone, which is at least partially located inside the sleeve, to move in the direction from the tool opening to the borehole. This movement exerts a force on the sleeve's expansion zone. This force can cause the sleeve to move along with the inner element. Furthermore, if a minimum force is exceeded, the expansion zone can cause the expansion zone to expand further. Since the retention area opposes further penetration of the sleeve into the substrate, it can be designed as a setting depth limiter.

[0012] The advantage of the described fastening system over the prior art is that it can be mounted to a substrate in a single step. For this purpose, at least one cutting element of the inner element can be inserted into the substrate (for example, by rotating the inner element and thus the cutting element), thereby creating a blind hole in the substrate. The inner element then guides the sleeve, drawing the sleeve into the blind hole. This movement of the inner element continues until the sleeve's retaining area prevents further penetration into the substrate. The retaining area prevents further penetration by resisting this movement.Within the scope of the present invention, the holding area can be configured in a variety of ways. One possibility is that the holding area has a projection that prevents it from penetrating the ground. Other configurations are also possible, and examples of such configurations are described below. The force exerted by the holding area to oppose further penetration of the sleeve into the ground is directed against the thrust and prevents the sleeve from being carried along by the movement of the inner element, thus preventing further penetration of the sleeve into the ground. This results in a relative movement between the inner element and the sleeve. As a consequence of this relative movement, the spreading area of ​​the inner element expands the spreading zone of the sleeve, thereby creating a force-fit 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., the anchoring) are all accomplished in a single step by driving the inner element into the subsoil. Furthermore, the entire installation process of the fastening element in the subsoil requires only a single setting tool capable of driving at least one cutting element of the inner element, for example, by rotation and / or impact, thereby driving the inner element into the subsoil. This not only simplifies the installation process of 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] The expanding zone of the sleeve has a first outer diameter in its unexpanded 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 foremost end, which first contacts the substrate, and widens towards its rear end. This causes the outer diameter of the drilling area to change depending on the distance from the tip. Furthermore, the at least one cutting element of the drilling area can be configured as one or more projections formed on the circumferential surface of the drilling area, which do not necessarily extend over the entire circumference. Therefore, the maximum outer diameter of the drilling area is referred to below. In a preferred embodiment, this is the diameter of the largest circumcircle of the drilling area.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 zone of the sleeve, or larger than the first outer diameter of the sleeve. This allows the sleeve to slide into the blind hole with minimal resistance during the assembly process until the holding area prevents further penetration.

[0016] The expert 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 manufacturing tolerances are permissible. What is relevant is that the first and second outer diameters are matched in such a way that they allow the sleeve to penetrate the blind hole – particularly by being carried along by the movement of the inner element – ​​and also allow the expansion of the sleeve's expansion zone to provide sufficiently strong anchoring of the sleeve in the blind hole.

[0017] In a further preferred embodiment, the spreading section of the inner element is designed such that it 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 ground without impairing its ability to carry the sleeve along during advance into the ground. This can be achieved, for example, by a conical design of the spreading section. Alternatively, it can be achieved by ensuring that the cross-sections of the spreading section and the interior of the sleeve do not have complementary geometries. Furthermore, the conical design allows the spreading section to engage the spreading zone during advance of the inner element and a successive expansion of the spreading zone during further advancement of the inner element.In other preferred embodiments, the spreading area can also be formed in steps, with the steps having a larger outer diameter with increasing distance from the drilling area. In still other preferred embodiments, the spreading area can also be formed as a thread or as knurling.

[0018] Consequently, the inner element preferably has a shape with varying outer diameters. The drilling area has the largest outer diameter. The spreading area has an outer diameter that varies depending on its distance from the drilling area. Preferably, the outer diameter of the spreading area is largest at the point furthest from the drilling area. This largest, i.e., maximum, outer diameter of the spreading area is, however, preferably smaller than the outer diameter of the drilling area. Between the drilling area and the spreading area, the diameter of the inner element is smaller than both the outer diameter of the drilling area and the maximum outer diameter of the spreading area. This results in a kind of indentation, which can also be described as a trough, between the drilling area and the spreading area.The recess allows the expanding zone of the unexpanded sleeve to grip the inner element in the area of ​​the recess. This becomes further clear with reference to the attached drawings, in particular the [reference to drawing]. Figure 1 and 4 .

[0019] In a further preferred embodiment, the at least one cutting element can be configured as a cutting edge. Furthermore, in a preferred embodiment, the drilling area can have several cutting elements, each configured as a cutting edge. Preferably, these multiple 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 (i.e., the tip of the drilling area). Preferably, three cutting elements configured as cutting edges are provided. More preferably, the three cutting edges are at an angle of 120° to each other.

[0020] In a further preferred embodiment, the inner element can be at least partially formed from a metal. For example, forming at least part of the drilling area—in particular the at least one cutting element—from a metal can enable drilling in hard substrates such as concrete or masonry. The drilling area, or at least the at least one cutting element, can, for example, be made of hardened steel. Alternatively, the at least one cutting element can also be formed by applying sintered material to a drilling area made of stainless steel.

[0021] Alternatively or additionally, the sleeve can be made at least partially of metal. A metal sleeve can be advantageous, for example, for heavy-duty anchors, where the expansion of a metallic expansion zone in the sleeve creates an undercut in the substrate, thus providing a particularly high pull-out force. Steel would be a suitable metal. However, it is also possible to manufacture at least the sleeve from plastic, which can be advisable, for example, for a fastening system used to secure insulation materials, in order to avoid thermal bridges.

[0022] In further preferred embodiments, the sleeve and / or the inner element are designed to allow the removal of drilling dust generated during assembly. Removal of drilling dust can be facilitated, 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.

[0023] For example, openings can be provided laterally in the sleeve through which drilling dust generated during the installation process can enter the interior of the sleeve. Preferably, the drilling dust can be removed from the fastening system from there, for example, via a suction device on a setting tool or by forces generated during the installation process as 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.

[0024] The channel can be formed within the sleeve. In another preferred embodiment, the channel can be formed on an outer surface 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 connects to the channel inside the inner element when the setting tool engages. This allows, for example, the extraction of drilling dust if the setting tool is equipped with a dust extraction device.

[0025] The drilling area of ​​the inner element, in the case of one or more additional openings or a channel, 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. 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 to engage with the receptacle and establish a connection there 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 dust offer the advantage that the drilling dust cannot accumulate in the drilling area and impede the advancement of the inner element and / or the sleeve. As the inner element advances, the drilling dust can enter the interior of the sleeve or the channel and be removed from there.

[0027] The retaining area is designed to prevent further penetration of the sleeve into the substrate by resisting this penetration. Thus, as the inner element is driven further into the substrate, the retaining area causes the expansion zone to spread. Several examples of the design of such a retaining area are described within the scope of the present invention. However, those skilled in the art will recognize that this function can also be achieved by other means. For example, the retaining area can be designed as a projection on the sleeve. In a preferred embodiment, the retaining area of ​​the sleeve can also be designed as a retaining 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-layered substrate, which, for example, includes an anchoring base and an insulating material. In this case, the retaining plate can serve to fasten 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 have, in addition to a first holding area, a further holding area designed as a retaining plate. In this case, the further holding area designed as a retaining plate serves only to hold an insulating material relative to the substrate, while the first holding area applies the force at a specific point during installation to allow the sleeve to penetrate further into the substrate, thus causing the expansion zone to expand. In this case, the first holding area is preferably positioned between the borehole and the retaining plate.

[0029] 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 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 a drive in the subsurface. Alternatively, the inner element can also be designed such that it has a passage to allow the setting tool to engage directly in a receptacle located at the drilling area. For example, the inner element can be hollow, at least in sections, or have guide rails for the setting tool.

[0030] In another 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, for example, be applied 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, for example, be injection-molded 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.

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

[0032] Furthermore, the present problem is also solved 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 comprises a sleeve and an inner element. The sleeve further comprises a holding area, an expansion zone, and at one of its two ends a drilled opening and at the other end a tool opening, wherein the expansion zone is arranged at least partially between the holding area and the drilled opening. The inner element is arranged at least partially inside the sleeve and is movable relative to the sleeve. The inner element comprises a drilled area and an expansion zone, wherein the drilled area has at least one cutting element and the drilled area projects at least partially from the drilled opening of the sleeve.

[0033] The method involves driving in at least one cutting element of the inner element and simultaneously moving the sleeve with the movement of the inner element until the holding area of ​​the sleeve opposes further movement of the sleeve, as well as further driving of 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 area of ​​the inner element through the relative movement.

[0034] The fastening system used in the assembly method according to the invention can be one of the fastening systems described above. If a fastening system is used for mounting 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 problem is also solved by a method according to the invention for manufacturing a fastening system for mounting on a substrate. The method according to the invention comprises providing a plurality of embossing and / or stamping tools and a sleeve blank, wherein the sleeve blank has a substantially cylindrical shape, as well as providing an inner element, wherein the inner element has a drilling area and an expanding 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 an expanding zone in the pressed-in section. The section of the inner element that is placed in the sleeve blank has at least a part of the expanding area.The person skilled in the art will understand that the fastening system can be joined by rolling in addition to pressing using embossing and / or stamping tools, without deviating from the teaching of the present invention.

[0036] The main advantage offered by the manufacturing process according to the invention is the relative arrangement of a sleeve and an inner element, wherein the drilling area can be arranged at least partially outside the sleeve and the spreading area of ​​the inner element is arranged at least partially inside the sleeve.

[0037] In the manufacturing process according to the invention, the spreading area of ​​the inner element is conically shaped and the circumferential pressing in of the section of the sleeve blank takes place on the conically shaped spreading area of ​​the inner element.

[0038] In a further preferred embodiment, the circumferential pressing in 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 in. Expanding the expansion zone can then be achieved, for example, by separating the predetermined separation point. Advantageously, the predetermined separation point is formed directly during the formation of the expansion zone by the embossing or stamping 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 pressing preferably creates 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 with three predetermined separation points, each predetermined separation point can be located after one-third of the circumference.

[0039] The previously described embodiments of the manufacturing process for the fastening element are not exclusive, but can be combined, thereby combining their technical effects and allowing them to 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: Figure 1a, b, c Cross-sections of a fastening system according to the invention in 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 from Figure 1, 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 driving of the fastening system and (c) the spreading of the spreading zone of the sleeve of the fastening system by further driving of the fastening system.Figure 3 Cross-section of a fastening system according to the invention in another exemplary embodiment with a retaining plate for an insulating panel. Figures 4a, b, c Schematic representation of a manufacturing process for a fastening system according to the invention, wherein (a) shows an initial state at the beginning of the manufacturing process with embossing and / or stamping tools in their starting position, (b) shows an intermediate step during the manufacturing process with embossing and / or stamping tools in a state pressed into a sleeve blank, and (c) shows the end of the manufacturing process, in which the embossing and / or stamping tools have returned to their starting position. Each of the three drawing components shows a top view and a cross-sectional view.

[0041] Figure 1Figure 1 shows cross-sections of a fastening system 100 according to the invention, based on an exemplary embodiment. The fastening system 100 according to the invention comprises a sleeve 110 and an inner element 150. The sleeve 110 is shown by way of example in Figure 1(a) The sleeve 110 forms a hollow cylinder 120 and has two open ends 125a, 125b, one end 125a being referred to as the bore opening and the other end 125b as the tool opening. In the embodiment shown here, the bore opening is located at end 125a (first end). Furthermore, the sleeve has a spreading zone 130 at the first end 125a. At the end 125b, where the tool opening is located (second end), the sleeve has a retaining area 140. In the embodiment shown here Figure 1(a)The holding area 140 is formed as a circumferential projection 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) which separate when the expansion zone 130 is expanded, thus enabling the expansion of the expansion zone 130.

[0042] Figure 1(b)Figure 1 shows an inner element 150 of the fastening system 100 according to the invention. The inner element 150 has an expansion area 180 and a drilling area 170. According to the invention, the expansion area 180 is conical. The drawing shows a preferred embodiment in which the drilling area 170 has a larger diameter than the expansion area 180. Additionally, the area 160 between the drilling area 170 and the expansion area 180 has a diameter that is smaller than both the outer diameter of the drilling area 170 and the maximum outer diameter of the expansion area 180. This allows the expansion zone 130 to be pressed onto the area 160 between the drilling area 170 and the expansion area 180, for example, during the manufacture of the fastening system 100.In other words, the area 160 between the drilling area 170 and the spreading area 180 forms a trough 160 and the unspread spreading zone 130 of the sleeve 110 can engage in the trough 160.

[0043] Figure 1(c) The fastening system 100 according to the invention consists of the sleeve 110 made of Figure 1(a) and the inner element 150 located at least partially inside the sleeve 110 Figure 1(b)It turns out that the maximum outer diameter of the bore 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 considering the holding area). This allows the expansion area 180 of the inner element to guide the sleeve 110 into the ground during its advance, and the sleeve 110 to slide into the blind hole until the holding area 140 of the sleeve 110 encounters the ground. Further advancement 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 an expansion of the expansion zone 130 by the expansion area 180 of the inner element 150.

[0044] Figure 2 shows an illustration of an assembly process of a fastening system 100 according to the embodiment shown Figure 1Figure (a) shows an initial position of a fastening system 100 located in front of a substrate 200. This means that Figure 2(a) shows the state before the start of the assembly process when the fastening system 100 is provided.

[0045] As the drilling area penetrates the subsoil, a blind hole is created, which in Figure 2(b)As shown, simultaneously with the creation of the blind hole, the inner element 150 is driven into the forming blind hole. It is clear to those skilled in the art that either the inner element is already in a position where the expansion zone 180 of the inner element 150 meets the expansion zone 130 of the sleeve 110, and the sleeve 110 is immediately driven into the ground by the movement of the inner element 150, 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 zone 180 of the inner element 150 meets the expansion zone 130 of the sleeve 110. The expansion zone 130 acts as a barrier for the expansion zone 180 and prevents further relative movement.As a result, the sleeve 110 is carried along by the impact of the spreading area 180 of the inner element 150 on the spreading zone 130 of the sleeve, as the inner element 150 undergoes further thrust into the subsoil 200.

[0046] Once the sleeve 110 has been advanced with the inner element 150 to the point where the retaining area 140 contacts and rests on the ground 200, this support exerts a force that prevents the sleeve 110 from advancing further into the blind hole. If the inner element 150 experiences sufficient advancement due to the driving of the drilling section 170 into the ground, the inner element 150 begins to move again relative to the sleeve 110. The expanding area 180 gradually penetrates the expanding zone 130, thereby expanding the expanding zone 130. This expansion forces material from the expanding zone 130 of the sleeve 110 outwards against the walls of the blind hole in the ground.This displacement of the expansion zone 130 of the sleeve 110 results in 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. For example, the displacement of the material of the expansion zone 130 of the sleeve 110 can create an undercut, which further increases the anchoring force. This is particularly preferred if the expansion zone 130 of the sleeve 110 is at least partially made of metal. In another embodiment, the displacement of the expansion zone 130 of the sleeve 110 can be achieved by compressing 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.

[0047] Figure 3Figure 1 shows a cross-section of a fastening system according to the invention in another exemplary embodiment with a retaining plate for an insulation board. In this case, the substrate consists of an anchoring base 500 and an insulation board 550.

[0048] The fastening system in Figure 3The sleeve has a substantially cylindrical element 420. At a front end of the cylindrical element 420, there is an expansion zone 430 and a bore opening through which an inner element of the fastening system partially protrudes. While an expansion area 480 of the inner element lies within the cylindrical element 420 of the sleeve, a bore area 470 of the inner element is located outside the bore opening of the sleeve. At a rear end, the cylindrical area 420 has a retaining area designed as a retaining plate 440. This retaining plate 440 is adapted to fasten an insulation board 550 to the anchoring base 500 when the Figure 3 The mounting system shown is installed.

[0049] The functionality of the fastening system made of Figure 3 is similar to the fastening system made of Figure 1However, the retaining area is designed as a retaining plate 440 for an insulation board. As soon as the retaining plate contacts the insulation board of the substrate, the contact of the retaining plate on the insulation board exerts a force against further penetration of the sleeve into the substrate, which causes the expansion zone of the inner element to expand as the inner element is further driven into the substrate.

[0050] Figure 4 shows an illustration of a manufacturing process for a fastening process according to the invention. Figure 4(a)Figure 700a-f shows exemplary embossing and punching tools suitable for circumferentially pressing in a sleeve blank and thereby creating an expansion zone 630 in the pressed-in section of the sleeve. Those skilled in the art will understand that, during circumferential pressing of the sleeve, the embossing and / or punching tools 700a-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. By cutting, for example, one or more predetermined separation points 635 can be created.

[0051] Figure 4(a)The upper part of the drawing shows a top view of the embossing and / or punching tools 700a-f, which are arranged circularly around a sleeve blank with an inserted inner element. This view shows three cutting elements 675 of the bore area 670 of the inner element, as well as the spreading zone 630 in the blank state and the holding area 640. A cross-section along line AA in the upper part of the drawing is shown in the lower part of the drawing. The cross-section shows how the embossing and / or punching tools can engage in the front area of ​​the sleeve (i.e., at the end that has the bore opening) to form a spreading zone 630. Figure 4(a) The embossing and / or stamping tools 700a-f are in their starting position.

[0052] Figure 4(b)This shows the state during the manufacturing process in which the embossing and / or stamping 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 top view and the lower part a cross-section along line AA.

[0053] Figure 4(c) This shows the state at the end of the manufacturing process, that is, after the embossing and / or stamping tools 700a-f have pressed in the front part of the sleeve blank to form the expansion zone 630. Now the embossing and / or stamping tools 700a-f are back in their starting position. It can be seen in Figure 4(c)that the embossing and / or stamping 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 stamping 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 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 line AA.

[0054] One of the advantages of the described manufacturing process is that the expansion zone 630 is pressed onto the inner element, thus enabling the inner element to be positioned within the sleeve. Due to the areas of the inner element with varying diameters, this results in the expansion zone of the sleeve engaging in the area between the bore area 670 and the expansion area of ​​the inner element (see recess 160 in [reference missing]). Figure 1(b) ).

[0055] Those skilled in the art will understand that the holding area 640 can also be formed by embossing and / or stamping tools. This can be done before, after, or simultaneously with the formation of the spreading zone. Alternatively, the holding area 640 can be formed before or after the formation of the spreading zone via a machining process.

[0056] The above description contains exemplary embodiments of one or more embodiments of the invention. Naturally, 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 further combinations of other embodiments. 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

1. A fastening system (100) for mounting at a substrate (200, 500), the fastening system (100) comprising a sleeve (110) and an inner element (150), wherein the sleeve (110) comprises a holding portion (140, 440, 640), a spreading zone (130, 430, 630) as well as a drill opening (125a) at one of the two ends of the sleeve (110) and a tool opening (125b) at the other end, wherein the spreading zone (130, 430, 630) is arranged at least partially between the holding portion (140, 440, 640) and the drill opening (125a), and wherein the inner element (150) is arranged at least partially within the sleeve (110) and is movable relative to the sleeve (110), and wherein the inner element (150) comprises a drilling portion (170, 470, 670) and a spreading portion (180, 480), wherein the drilling portion (170, 470, 670) comprises at least one cutting element and the drilling portion (170, 470, 670) projects at least partially out of the drill opening (125a) of the sleeve (110) and the spreading portion (180, 480) of the inner element (150) is adapted to spread the spreading zone (130, 430, 630) of the sleeve (110) upon a movement of the spreading portion (180, 480) in the sleeve (110) and relative to the sleeve (110) in the direction from the tool opening (125b) to the drill opening (125a); characterized in that the spreading portion (180, 480) of the inner element (150) is conically shaped.

2. The fastening system according to claim 1, wherein the spreading zone (130, 430, 630) of the sleeve (110) comprises a first outer diameter in the unspread state and the drilling portion (170, 470, 670) of the inner element (150) comprises a maximum second outer diameter and wherein the maximum second outer diameter and the first outer diameter are of equal size or the maximum second outer diameter is larger than the first outer diameter.

3. The fastening system according to any one of the preceding claims, wherein the inner element (150) is formed at least partially from a metal.

4. The fastening system according to claim 3, wherein the drilling portion (170, 470, 670) of the inner element (150) is formed at least partially from a metal.

5. The fastening system according to any one of the preceding claims, wherein the sleeve (110) is formed at least partially from a metal or a plastic.

6. The fastening system according to any one of the preceding claims, wherein at least a portion of the holding portion (140, 440, 640) of the sleeve (110) is formed as one of: a circumferential projection, a holding plate (440) for holding insulating material, or a conical portion.

7. The fastening system according to any one of the preceding claims, wherein the inner element (150) comprises a receptacle (190) for a setting tool (300).

8. A method for mounting a fastening system (100) at a substrate (200, 500), wherein the fastening system (100) is a fastening system according to any of claims 1 to 7, and wherein the method comprises the steps of: driving the inner element (150) into the substrate and simultaneously carrying the sleeve (110) along with the movement of the inner element (150) until the holding portion (140, 440, 640) of the sleeve (110) opposes a force to further carry the sleeve (110) along; and further driving the inner element (150) into the substrate, whereby a relative movement is generated between the inner element (150) and the sleeve (110), and simultaneously spreading the spreading zone (130, 430, 630) of the sleeve (110) with the spreading portion (180, 480) of the inner element (150) by the relative movement.

9. A method for manufacturing a fastening system (100) for mounting at a substrate (200, 500), the method comprising: providing a plurality of embossing and / or punching tools; providing a sleeve blank, the sleeve blank having a substantially cylindrical shape, a holding portion (140, 440, 640) as well as a drill opening (125a) at one of the two ends of the sleeve (110) and a tool opening (125b) at the other end; providing an inner element (150), wherein the inner element (150) comprises a drilling portion (170, 470, 670) and a spreading portion (180, 480) and wherein the drilling portion (170, 470, 670) comprises at least one cutting element arranged thereon and the spreading portion (180, 480) of the inner element (150) is conically shaped; placing the first end of the inner element (150) in the sleeve blank; circumferentially pressing, by using the plurality of embossing and / or punching tools, at least a portion of the sleeve blank onto the inner element (150) and thereby forming a spreading zone (130, 430, 630) in the pressed portion, wherein said portion of the sleeve blank is located between the drill opening (125a) and the tool opening (125b), and wherein the drilling portion (170, 470, 670) of the inner element (150) extends at least partially through the drill opening (125a) of the sleeve (110), and wherein the spreading portion (180, 480) of the inner element (150) is adapted to spread the spreading zone (130, 430, 630) of the sleeve (110) upon a movement of the spreading portion (180, 480) in the sleeve (110) and relative to the sleeve (110) in the direction from the tool opening (125b) to the drill opening (125a); and during the circumferentially pressing, generating at least one predetermined separation point in the spreading zone formed by the pressing using at least one embossing or punching tool.