Connection system for connecting at least two, in particular plate-like, elements; assembly comprising such a connection system

Abstract

The invention relates to a connection system (10) for connecting at least two, in particular plate-like, elements, comprising a bolt (12), a nut (14) corresponding to the bolt (12) and having a screwing channel (17) extending along a screwing axis (15) into which the bolt (12) can be screwed, and a holder (16) for receiving the nut (14), wherein the nut (14) has a foot portion (22) and a head portion (20) adjoining the foot portion along the screwing axis (15), the foot portion (22) at least partially projecting beyond the head portion (20) in a direction perpendicular to the screwing axis (15). The invention also relates to an assembly (11) comprising such a connection system (10).

Description

Technical Field

[0001] The present invention relates to a connection system for connecting at least two, particularly plate-shaped, components having the features of the preamble of claim 1, and to an assembly having the features of the preamble of claim 15. Background Technology

[0002] Various connection and fastening systems are known. It may be desirable to design a threaded connection comprising a bolt and an associated nut, such that the connection links two elements together and requires only access from one side for this purpose. This is particularly desirable when it is difficult to apply tools to the nut, as there is insufficient space available. Such connection systems are used, for example, in assembling metal profiles or constructing gantry frames.

[0003] Therefore, DE 10 2017 116 858 A1 describes, for example, a fastening element for fastening to a mounting rail, the fastening element having a T-bolt housed in a U-shaped clamp such that the T-bolt can pivot about an axis.

[0004] DE 10 2017 116 856 A1 proposes a rectangular tubular mounting rail with a T-bolt as a fastening element. The mounting rail is designed with a recess extending in the longitudinal direction, and a disc-shaped support for the fastening element can be recessed into the recess, the disc-shaped support being disposed on the shank of the bolt of the fastening element. Summary of the Invention

[0005] The object of the present invention is to provide a connection system designed to connect two elements or components, particularly plate-shaped ones, and which can be easily fastened from one side.

[0006] The objective is achieved by a connection system having the features of claim 1. This connection system includes a bolt and a corresponding nut. The nut has a threaded connection channel extending along the threaded connection axis. The bolt can be screwed into this threaded connection channel. The threaded connection channel preferably has internal threads in at least some portions. In this way, for example, a conventional bolt can be screwed in.

[0007] The connection system also includes a retainer for receiving the nut. This retainer is used to hold the nut while the bolt is screwed in, particularly to hold the nut in reverse without the need for a wrench.

[0008] The nut has a specific shape, comprising a foot portion and a head portion adjacent to the foot portion along the threaded connection axis. The foot portion protrudes beyond the head portion, at least partially, in a direction perpendicular to the threaded connection axis. In other words, viewed along the threaded connection axis, the foot portion has a larger cross-sectional area than the head portion. In this respect, the nut can be designed as a T-nut, wherein the foot portion extends beyond the head portion in a hammer-like manner.

[0009] The aforementioned design allows the head portion of the nut to extend through the elements or components to be fastened together, while the foot portion rests against one of the elements or components. By screwing in the bolt, the elements / components to be fastened then press against each other, where lateral forces are absorbed by the head portion of the nut. Because the nut is received in a cage when the bolt is screwed in, easy operation from one side is possible, especially without the need for a wrench to tighten the nut in reverse.

[0010] The foot and head portions of the nut preferably turn into each other in a stepped manner. In particular, the foot and head portions together form a step. In this respect, an inner edge may extend between the foot and head portions, in which the side surface of the head portion intersects the surface of the foot portion substantially at a right angle.

[0011] The threaded connection channel preferably extends through both the head and foot portions. Specifically, the threaded connection channel can be in the form of a through-hole extending through both the head and foot portions. In other words, the threaded connection channel extends at least through the head portion of the nut, allowing the bolt to be screwed into the nut, particularly into the head portion. The through-hole allows for the use of bolts of varying lengths.

[0012] It would be advantageous for the head and / or foot portions to have an upper side that extends substantially perpendicular to the threaded connection axis, and this upper side is flat, and particularly smooth. In the sense of this application, smooth means, in particular, free of wrinkles. This design feature can be eliminated in the aforementioned connection system because the forces acting laterally relative to the threaded connection axis are largely absorbed by the nut (especially the head portion).

[0013] Specifically, the upper side of the head portion and / or the foot portion is positioned perpendicular to the threaded connection axis. Specifically, the upper side of the foot portion is designed to rest against the surface of the components to be connected and press these components against each other.

[0014] The retainer preferably has a base portion and a side portion adjacent to the base portion. The retainer may define a receiving space for the nut. The side portion may then have at least one hole through which the nut can be at least partially pushed into the receiving space. The base portion of the retainer may be flat; have ridges and / or recesses and / or, for example, be corrugated to prevent the nut from slipping out.

[0015] It would be advantageous for the cage to have a cover portion adjacent to the side portion and positioned at a distance from the base portion. Similar to the base portion, it is conceivable that the cover portion of the cage could be flat; have ridges and / or recesses and / or be, for example, pleated to prevent the nut from slipping out. The nut is largely secured in the cage by the cover portion, thus allowing the bolt to be screwed in easily.

[0016] Bolt openings for bolt passage are preferably located in the base portion and / or the cap portion. The bolt openings in the base portion and the cap portion may have the same shape and / or size. It is also conceivable that the bolt openings in the base portion and the cap portion may have different shapes and / or sizes, since the bolt openings do not necessarily need to provide a guiding function for the bolt.

[0017] Advantageously, the cage and nut are designed so that the nut can be pushed through a hole in the side portion into the receiving space in a direction perpendicular to the threaded connection axis, aligning the threaded connection channel with the bolt opening in the base portion and / or the bolt opening in the cover portion. For connection, the bolt can then be screwed into the threaded connection channel of the nut through the bolt opening in the cover portion. The bolt or nut is largely secured, thus preventing accidental dislodgement from the cage.

[0018] Preferably, when the nut is pushed into the receiving space, the head portion is fully received within the receiving space. In this case, the foot portion can extend at least partially beyond the receiving space through a hole in the side portion.

[0019] It would be advantageous for the side portions of the cage to have at least one inner surface facing the receiving space, particularly two opposing inner surfaces. The inner surfaces can provide contact surfaces for the side surfaces of the foot portion and / or the head portion, such that when the nut is pushed into the receiving space, the nut is secured to prevent rotation about the threaded connection axis. In particular, the contact surfaces can be flat; have ridges and / or recesses and / or, for example, be corrugated to prevent the nut from slipping out.

[0020] Specifically, the nut has two opposing flat surfaces. Specifically, the side surface of the head portion and the side surface of the foot portion lie in a plane. In this respect, the nut is preferably designed to be flat on both opposing sides (each flat surface includes one of the aforementioned side surface of the foot portion and one of the adjacent side surfaces of the head portion).

[0021] The foot portion of the nut protrudes beyond the head portion, particularly at its two opposite ends, but extends flush with the head portion between the two protruding areas (thus forming a flat surface on the side of the nut). Generally, when viewed in the projection of the threaded connection axis, the head portion and the foot portion are preferably of the same width, but the foot portion is longer than the head portion and therefore extends beyond it.

[0022] The cage preferably has a cylindrical shape, especially a cylindrical shape. Therefore, the cage can be pushed into or inserted through a hole in the element to be connected.

[0023] The base portion and / or the cover portion may extend in a flat manner and have a rounded, in particular circular, outer perimeter.

[0024] In another design, the base portion can be considered larger than the cover portion when projected along the threaded connection axis. Specifically, when projected along the threaded connection axis, the base portion can extend beyond the cover portion into the region of the hole. In other words, in a plan view of the connection system, both the cover portion and part of the base portion are visible. When viewed from below the connection system, only the base portion is visible. This allows the retainer to pass its base portion through the corresponding hole or elongated hole in the parts to be connected; however, due to the smaller diameter of the cover portion, the retainer can still rotate and / or slide within the elongated hole.

[0025] Preferably, at least two protrusions are provided on the cage, for example, as protruding wings or tabs. The protrusions are particularly provided on the side portions of the cage and / or the cover portions of the cage, and in the screw-on state, extend particularly away from the threaded connection axis, and are particularly rotationally symmetrical and / or opposite to each other with respect to the threaded connection axis. Preferably, precisely two protrusions are provided, located on opposite sides of the cage. This allows the protrusions to be operated with two fingers of one hand, and thus the cage. More preferably, three protrusions may be provided on the cage, such that the cage can be operated with three fingers of one hand. The three-finger grip is particularly stable and comfortable to operate. In particular, the distance between the protrusions can be equal.

[0026] At least one resilient element is preferably disposed on the base portion. In the assembled state of the connection system, the resilient element can push the nut, particularly the foot portion, away from the base portion. In other words, the resilient element presses the nut away from the base portion against the bolt or against an optionally present cap portion. In this way, in the assembled state, the nut is preloaded against the bolt head, particularly along the threaded connection axis. The resilient element may extend into the receiving space of the cage, or may be designed to extend away from the receiving space or a side portion.

[0027] The elastic element can extend radially outward in a wing-like manner from the base portion and / or side portion, that is, radially away from the threaded connection axis. However, it is also possible to consider the elastic element extending radially inward, that is, radially towards the threaded connection axis.

[0028] It is particularly advantageous to provide two elastic elements, which are specifically provided on opposite sides of the base portion.

[0029] The desired objective is further achieved by a component according to the invention having the features of the appended independent claims. In this respect, the component represents a mating element and includes a connection system having the aforementioned features, particularly a plate-shaped first element or component and a plate-shaped second element or component, each having at least one hole. The hole has a shape corresponding to the base portion of the nut and / or retainer, such that the retainer can be introduced into the hole together with the received nut.

[0030] In another design, the first element and / or the second element has a first elongated hole with two long sides. The distance between the long sides may correspond to the base portion of the cage, allowing the cage to be introduced into the elongated hole along with a receiving nut, and the connecting system to move along the elongated hole. It is possible that the connecting system moves along the first elongated hole independently of rotation of the connecting system about the threaded connection axis.

[0031] The first and / or second element advantageously has a second elongated hole having two long sides, and at at least one point having a shape corresponding to the base portion of the cage. At this point, the distance between the two long sides can be greater than the distance at another point of the second elongated hole, such that movement of the connecting system along the elongated hole can be prevented, particularly by rotating the cage 90° about the threaded connection axis. The connecting system can be introduced into the second elongated hole and pulled out again only at these points.

[0032] The connecting system and the two components are advantageously designed such that the first and second components can be positioned between the nut and the cage, thus the cage, together with the nut, surrounds the two components. The two components can be held together or pressed together by the cage and the nut, for example, as an assembly aid. Attached Figure Description

[0033] Other features, details, and advantages of the invention can be found in the language of the claims and in the following description of the embodiments with reference to the accompanying drawings, wherein:

[0034] Figure 1 This is a perspective view of the connection system in a disassembled state;

[0035] Figure 2 It is based on Figure 1 A perspective view of the connection system in its assembled state;

[0036] Figure 3 It is based on Figure 1 A cross-sectional view of the connection system in which two components are connected;

[0037] Figure 4 It is based on Figure 1 The connection system is perpendicular to the state in which the two elements are connected. Figure 3 A sectional view showing the cross-sectional arrangement in the middle;

[0038] Figure 5 This is a perspective view of the components according to the present invention;

[0039] Figure 6 Another embodiment of the connection system is shown;

[0040] Figure 7 It is based on Figure 6 A sectional view of the connection system;

[0041] Figure 8 This is a cross-sectional view of another embodiment of the connection system. Detailed Implementation

[0042] In the following description and accompanying drawings, corresponding parts and elements have the same reference numerals. For clarity, not all reference numerals are shown in all drawings.

[0043] Figure 1 This is a perspective view of the connection system 10 according to the invention in a disassembled state. The connection system 10 includes a bolt 12 and a nut 14. The bolt 12 is shown only schematically and has no external threads. The nut 14 has a threaded connection channel 17, which in this case is in the form of a through hole and extends along the threaded connection axis 15. The threaded connection axis 15 is... Figure 1 The threaded connection channel 17 is shown in dashed lines. The threaded connection channel 17 has an internal thread (not shown) that corresponds to the external thread (also not shown) of the bolt 12, so that the bolt 12 can be screwed into the threaded connection channel 17 of the nut 14.

[0044] Nut 14 has a foot portion 22 and a head portion 20 adjacent to the foot portion 22 along the threaded connection axis 15. In this case, nut 14 is formed in one piece. However, it is possible to design nut 14 as consisting of multiple elements. For example, the head portion 20 of nut 14 can be formed in one piece, and the foot portion 22 of nut 14 can be formed in one piece.

[0045] In this case, the foot portion 22 transitions into the head portion 20 in a stepped manner. The foot (flow) portion 22 extends beyond the head portion on two opposite sides of the head portion or the foot portions 20, 22, thus forming a stepped shape on each of these opposite sides.

[0046] The head portion 20 has a side surface 19, and the foot portion 22 has a side surface 18. In this case, both surfaces are in the form of a common flat side surface.

[0047] The head portion 20 has an upper side 21, which is perpendicular to the threaded connection axis 15 and is flat in this case. The foot portion 22 also has a surface 21 perpendicular to the threaded connection axis 15, i.e., parallel to the upper side 21 of the head portion 20. The upper side 21 of the foot portion is also flat. In particular, the upper side 21 has no circumference because the lateral force (acting along the surface of the element to be fastened) is absorbed by the head portion 20.

[0048] The head portion 20 has a generally rounded shape on two opposite sides, on which the foot portion 22 and the head portion 20 form a stepped shape.

[0049] Viewed in projection along the threaded connection axis 15, the foot portion 22 and the head portion 20 have width and length, respectively. The width of the foot portion 22 is preferably substantially the same as the width of the head portion, so that the nut 14 generally has a substantially flat side surface. However, the foot portion 22 is preferably longer than the head portion 20, such that the foot portion 22 protrudes beyond the head portion 20 at least partially in a direction perpendicular to the threaded connection axis 15. In another design, the length and width of the head portion 20 may be substantially the same. However, in the case of the foot portion 22, the length is preferably greater than the width. In particular, viewed in projection along the threaded connection axis 15, the foot portion 22 is substantially rectangular.

[0050] The connection system 10 also includes a retainer 16. In this case, the retainer 16 has a base portion 46, a side portion 30 adjacent to the base portion, and a cover portion 50 adjacent to the side portion 30. The base portion 46 is flat or planar and has a bolt opening 48 and a circular shape. The cover portion 50 is also flat or planar and has a bolt opening 48, which in this case has the same size and shape as the bolt opening 48 in the base portion 46. The cover portion 50 has a generally rounded shape.

[0051] The protrusions 32 are provided on two opposite sides of the cover portion 50. In this case, the protrusions 32 are hoop-shaped or wing-shaped and extend radially outward from the cover portion 50.

[0052] The retainer 16 forms a receiving space 44 for the nut 14. In this case, the receiving space 44 is defined by the base portion 46, the side portion 30, and the cover portion 50.

[0053] The side portion 30 has two holes 28 located on opposite sides of the side portion 30. Through these holes 28, the nut 14 can be pushed into the retainer 16 and thus into the receiving space 44 for the nut 14.

[0054] In this case, the two opposite sides of the side portion 30 are flat on their inner surfaces 45, i.e., the surfaces facing the receiving space 44. These inner surfaces 45 are designed such that when the nut is pushed into the retainer 16, the nut is positioned such that the side surfaces 18 and 19 lie on the inner surfaces 45. Therefore, the nut 14 is fixed relative to the retainer 16 to prevent rotation about the threaded connection axis 15. Thus, the retainer 16 and the received nut 14 together can be securely rotated and operated via the two protrusions 32.

[0055] Washer 13 is shown in the example. To assemble the connection system 10, nut 14 is pushed through one of the two holes 28 into receiving space 44, such that bolt openings 48 in base portion 46 and cover portion 50 are aligned with threaded connection channels 17. The connection system can be operated by extension 32 when nut 14 is received in retainer 16 or its receiving space 44. Subsequently, bolt 12 is optionally inserted or screwed in first through washer 13, then through bolt opening 48 in cover portion 50, through threaded connection channel 17 of nut 14, and then through bolt opening 48 in base portion 46.

[0056] Figure 2 It is based on Figure 1 A perspective view of the connection system 10 in its assembled state. In this state, the nut 14 is received in the retainer 16 or the receiving space 44. The foot portions 22 extend through the holes 28 from the receiving space 44 or the retainer 16 on two opposite sides. The head portion 20 of the nut 14 is substantially disposed within the receiving space 44. In the example shown, viewed along the threaded connection axis 15, two protrusions 32 are positioned perpendicular to the direction of the through holes 28.

[0057] Figure 3 It is based on Figure 1A cross-sectional view of the connection system 10 in the state where the two elements 34 and 36 are connected. To connect the two elements 34 and 36, the nut 14 is first pushed into the receiving space 44 of the retainer 16. The retainer 16 and the nut 14 received therein can be operated from one side of the elements 34 and 36 to be connected by means of the two protrusions 32. In other words, the retainer 16 and the nut 14 received therein can be held from the same side of the elements 34 and 36 to be connected, and the bolt 12 can be screwed into the nut 14.

[0058] Plate-shaped components 34 and 36 are interconnected via a connecting system 10. By rotating bolt 12, the bolt is screwed into the internal thread of a threaded connection channel 17 provided in nut 14. Therefore, nut 14 moves towards the bolt head (i.e., in...). Figure 3 (Upward). The upper side 21 of the foot portion 22, extending from the receiving space 44, presses against the second element 36 and presses the second element against the first element 34. The first element 34 is then pressed by the washer 13 in the opposite direction (that is, in...). Figure 3 (Middle downwards). The two elements 34 and 36 are therefore clamped between the foot portion 22 of the nut 14 and the washer 13. Of course, this refers to relative motion.

[0059] The potential shear force between the two elements 34 and 36 is absorbed by the head portion 20 of the nut 14. This reduces the load on the bolt or prevents the shear force between the two elements 34 and 36 from being transmitted to the bolt 12, which could otherwise be the weakest point in the threaded connection.

[0060] Figure 4 It is based on Figure 1 The connection system 10 is perpendicular to the state in which the two elements 34 and 36 are connected. Figure 3 The cross-sectional view shows the cross-sectional arrangement. In the indicated orientation, in addition to the head portion 20, the shear force is also at least partially absorbed by the side portion 30. This results in further reduction of the load on the bolt 12.

[0061] Figure 5 This is a perspective view of component 11 according to the invention. The first element 34 is shown in the form of a generally triangular corner element, while the second element 36 is shown in the form of a corner profile.

[0062] In this case, the second element 36 has multiple holes 38. When the nut 14 is received in the retainer 16 or the receiving space 44, the shape of the holes 38 corresponds to the shape of the base portion 46 and the nut 14. Therefore, the connecting system 10 can be inserted through such holes 38. In one orientation, the connecting system can be inserted through such holes 38, wherein insertion in a 90° rotation orientation is preferably prevented due to the shape of the holes 38. If the connecting system 10 rotates, for example, 90° about the threaded connection axis 15 after its insertion through the holes 38, the portion of the foot portion 22 of the nut 14 extending from the retainer 16 or the receiving space 44 prevents the connecting system 10 from being pulled out of the holes 38. In this rotated state, the connecting system 10 can connect two elements to each other (see...). Figure 4 ).

[0063] The first element 34 has a first elongated hole 40. The first elongated hole 40 has two long sides 42. The distance between the two long sides 42 of the first elongated hole 40 corresponds to the diameter of the base portion 46 of the retainer 16, and therefore corresponds to the widest point of the base portion of the retainer. Therefore, the connecting system 10 can slide along the first elongated hole 40. When the connecting system 10 is inserted through the first elongated hole 40, the connecting system 10 can also slide along the elongated hole 40 after rotating about the threaded connection axis 15, because the distance between the two sides 42 is correspondingly large.

[0064] Furthermore, the first element 34 has a second elongated hole 52. The second elongated hole has two long sides 54, and in this case, a plurality of points 56 are arranged along the second elongated hole 52 at which the distance between the long sides 54 corresponds to the diameter of the base portion 46 of the retainer 16, and thus corresponds to the widest point of the base portion of the retainer. The distance between the long sides 54 is greatest at these points. In this respect, the distance between the long sides 54 is smaller at other points of the second elongated hole 52. The connecting system 10 can be inserted into the second elongated hole 52 and pulled out only at points 56 (particularly at points with a large distance between the long sides 54). The minimum distance between the long sides 54 corresponds specifically to the width of the head portion 20 of the nut 14, and optionally to the width of the surrounding retainer.

[0065] The nut 14 receives the connecting system 10 in the retainer 16 and can therefore be pushed through the second elongated hole 52. After the connecting system 10 has been inserted through the second elongated hole 54 at one of the points 56, the connecting system 10 is prevented from sliding along the second elongated hole 52. The side portion 30 has a shape corresponding to the base portion 46, such that, except for the hole 28, the side portion 30 has a cylindrical shape. This has the effect of preventing sliding along the second elongated hole 52.

[0066] Rotating 90° about the threaded connection axis 15 makes sliding along the second elongated hole 52 possible. With this rotation, the side portion 30 of the retainer 16 rotates about the threaded connection axis 15, such that the hole 28 in the side portion 30 is positioned along the long side 54. The cylindrical profile of the side portion 30 is interrupted by the hole 28. Due to the hole 28 in the side portion 30, the retainer 16 has a smaller extension in this orientation, which corresponds to the minimum distance between the long sides 54. Figure 5 The example shown illustrates a state where the connection system 10 can slide along the elongated hole 52.

[0067] Figure 6 Another embodiment of the connection system 10 is shown. In this case, the base portion 46 is elongated and has two elastic elements 47. These elastic elements are disposed on opposite sides of the base portion 46 (at the two ends of the long side of the base portion 46) and extend radially inward and upward away from the base portion 46 relative to the threaded connection axis 15, i.e., into the receiving space 44. The elastic elements 47 are, in particular, elastic protrusions of the base portion 46. Specifically, the elastic elements 47 are designed in the form of spring tabs or leaf springs. The two elastic elements 47 are generally designed such that, when the connection system 10 is in the assembled state, i.e., when the nut 14 is received in the retainer 16, these elastic elements preload the nut 14 toward the bolt 12. In other words, the elastic elements 47 press the nut 14 upward toward the bolt head.

[0068] Figure 7 It is based on Figure 6 A cross-sectional view of the connection system 10. In this example, the connection system 10 is shown in its assembled state. The resilient element 47 presses the nut 14 against the bolt head (particularly away from the base portion 46). In the example shown, the nut 14 presses against the cover portion 50 via the upper side 21 of the head portion 20. The two resilient elements 47 can be formed as a single piece with the base portion 46. In other words, the resilient element 47 can be part of the base portion 46.

[0069] Figure 8 This is a cross-sectional view of the connection system 10, in which the elastic element 47 does not extend toward the central longitudinal axis (i.e., radially inward into the receiving space 44), but rather radially outward (i.e., away from the central longitudinal axis or away from the receiving space 44).

Claims

1. A connection system (10) for connecting at least two plate-shaped elements, the connection system (10) comprising a bolt (12), a nut (14), and a retainer (16), the nut corresponding to the bolt (12) and having a threaded connection channel (17) extending along a threaded connection axis (15) into which the bolt (12) can be screwed, the retainer for receiving the nut (14), characterized in that, The nut (14) has a foot portion (22) and a head portion (20) adjacent to the foot portion along the threaded connection axis (15). The foot portion (22) protrudes at least partially beyond the head portion (20) in a direction perpendicular to the threaded connection axis (15). The foot portion (22) has an upper side (21) configured to rest against the surface of the element for connection of the element. The retainer (16) has a base portion (46) and a side portion (30) adjacent to the base portion and defines a receiving space (44) for the nut (14). The side portion (30) has at least one hole (28) through which the nut (14) can be at least partially pushed into the receiving space (44). The retainer (16) has a cover portion (50) that is adjacent to the side portion (30) and is positioned at a distance from the base portion (46). The base portion (46) and / or the cover portion (50) are provided with bolt openings (48) for the bolt (12) to pass through. The retainer (16) and the nut (14) are designed such that the nut (14) can be pushed through the hole (28) in the side portion (30) into the receiving space (44) in a direction perpendicular to the threaded connection axis (15), such that the threaded connection channel (17) is aligned with the bolt opening (48) in the base portion (46) and / or the bolt opening (48) in the cover portion (50).

2. The connection system (10) according to claim 1, characterized in that, The foot portion (22) and head portion (20) of the nut (14) are turned into each other in a stepped manner.

3. The connection system according to claim 1 or 2, characterized in that, The threaded connection channel (17) extends through the head portion (20) and through the foot portion (22).

4. The connection system (10) according to claim 1 or 2, characterized in that, The upper side (21) is flat.

5. The connection system (10) according to claim 1, characterized in that, When the nut (14) is pushed into the receiving space (44), the head portion (20) is fully received in the receiving space (44), and the foot portion (22) extends at least partially from the receiving space (44) through the hole (28) in the side portion (30).

6. The connection system (10) according to claim 1 or 5, characterized in that, The side portion (30) of the retainer (16) has at least one inner surface (45) facing the receiving space (44), the inner surface (45) providing a contact surface for the side surface (18) of the foot portion (22) and / or the side surface (19) of the head portion (20), such that when the nut (14) is pushed into the receiving space (44), the nut (14) is secured to prevent rotation about the threaded connection axis (15).

7. The connection system (10) according to claim 1 or 5, characterized in that, The cage (16) has a cylindrical shape.

8. The connection system (10) according to claim 1, characterized in that, The base portion (46) and / or the cover portion (50) extend in a flat manner and have a rounded outer perimeter.

9. The connection system (10) according to claim 1, characterized in that, When viewed in projection along the threaded connection axis (15), the base portion (46) is larger than the cover portion (50).

10. The connection system (10) according to claim 1, characterized in that, At least two protrusions (32) are provided on the retainer (16), the protrusions being adjacent to the side portion (30) of the retainer (16) and / or the cover portion (50) of the retainer (16).

11. The connection system (10) according to claim 1 or 5, characterized in that, At least one elastic element (47) is provided on the base portion (46) such that, in the assembled state of the connection system (10), the elastic element (47) pushes the nut (14) away from the base portion (46).

12. The connection system according to claim 1 or 2, characterized in that, The threaded connection channel (17) passes through the head portion (20) and the foot portion (22) in the form of a through hole.

13. The connection system (10) according to claim 1 or 2, characterized in that, The upper side (21) is smooth.

14. The connection system (10) according to claim 1 or 5, characterized in that, The cage (16) has a cylindrical shape.

15. The connection system (10) according to claim 1, characterized in that, The base portion (46) and / or the cover portion (50) extend in a flat manner and have a circular outer perimeter.

16. The connection system (10) according to claim 9, characterized in that, The base portion (46) extends beyond the cover portion (50) in the region of the hole (28).

17. The connection system (10) according to claim 10, characterized in that, The protrusions extend away from the threaded connection axis (15) and are arranged rotationally symmetrically and / or opposite to each other relative to the threaded connection axis (15).

18. The connection system (10) according to claim 11, characterized in that, In the assembled state of the connection system (10), the elastic element (47) pushes the foot portion (22) away from the base portion (46).

19. A component (11) comprising a connection system (10) according to any one of the preceding claims, a plate-shaped first element (34), and a plate-shaped second element (36), wherein, The first element (34) and / or the second element (36) have at least one hole (38) having a shape corresponding to the base portion (46) of the nut (14) and / or the retainer (16) such that the retainer (16) together with the received nut (14) can be introduced into the hole (38).

20. The component (11) according to claim 19, characterized in that, The first element (34) and / or the second element (36) have a first elongated hole (40) having two long sides (42) and the distance between the long sides (42) corresponds to the base portion (46) of the retainer (16) such that the retainer (16) together with the received nut (14) can be introduced into the elongated hole (40) and the connection system (10) can move along the elongated hole (40).

21. The component (11) according to claim 19 or 20, characterized in that, The first element (34) and / or the second element (36) have a second elongated hole (52) having two long sides (54) at at least one point (56) corresponding to the base portion (46) of the retainer (16), the distance between the two long sides (54) at that point (56) being greater than the distance at other points of the second elongated hole (52), such that movement of the connection system (10) along the elongated hole (52) can be prevented by rotating the retainer (16) 90° about the threaded connection axis (15).

22. The component (11) according to claim 19 or 20, characterized in that, The connection system (10), the first element (34), and the second element (36) can be positioned such that the two elements (34, 36) can be clamped between the retainer (16) and the nut (14).

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