Protective covers, connecting elements, and assembly fixtures

Abstract

It provides a protective cover with adjustable length. [Solution] The length-adjustable protective cover comprises a plurality of interconnected shielding elements, each being movable relative to one another and having a cover leg (52) and an actuation leg (54) angled relative to the cover leg (52). The actuation legs (54) of adjacent shielding elements are connected to each other by at least one deformable connecting element (60). At least one of the actuation legs (54) is positioned between two connecting elements (60) that are connected to the actuation leg (54) on opposite sides. The first of the two connecting elements (60) has a fixing projection (82) that extends for fixing purposes through an opening in the actuation leg (54) and through a fixing recess in the second of the two connecting elements (60). The connecting elements (60) are used to connect adjacent shielding elements of the length-adjustable protective cover.

Description

[Technical Field]

[0001] The present disclosure relates to a protective cover comprising a plurality of shielding elements coupled to each other, each of which has a cover leg and an actuating leg angled relative to the cover leg, wherein adjacent actuating legs are coupled to each other by at least one deformable connecting element. The present disclosure further relates to a connecting element for coupling actuating legs of adjacent shielding elements for a protective cover. Finally, the present disclosure relates to an assembly apparatus for assembling two adjacent connecting elements by means of intervention of the actuating legs of shielding elements. [Background Art]

[0002] From the following Patent Document 1, a protective cover formed of a plurality of substantially L-shaped shielding elements connected to each other via connectors to form a flexible, length-adjustable shielding surface is known. Patent Document 1 below relates to a specific configuration of such a connector.

[0003] From the following Patent Document 2, a protective cover for a machine formed of a plurality of frame elements connected to each other via connectors to form a flexible, length-adjustable shielding surface is known. The connector between frame elements is intended to allow controlled movement of the cover. Patent Document 3 below relates to a similar configuration of a protective cover having a plurality of L-shaped shielding elements coupled overlapping each other via connectors, the connector having a living hinge that ensures deformability of the connector and therefore movement of the protective cover.

[0004] Patent Document 4 below discloses a protective cover for a machine, comprising a plurality of shielding elements and connectors that movably connect these shielding elements to one another. Each connector is configured as a separate component and comprises at least two movable arms joined to a central web. Patent Document 5 below discloses an elastic coupling element for connecting adjacent protective cover sections, such as thin plates or bellows frames. The coupling element comprises two coupling sides joined by at least one coupling leg and configured to exhibit spring-like elasticity during movement. The element may include a sliding connection to compensate for changes in length, allowing assembly via a snap-in mechanism.

[0005] Protective covers are used in machinery (especially machine tools) and other technical equipment to separate areas from each other in a prescribed, well-sealed manner. In the case of machine tools, for example, this involves the workspace where the actual machining takes place, and the rear space that houses components such as guides, transverse drive units, and auxiliary units.

[0006] The shielding elements of a protective cover may also be referred to as plates or scales. The shielding elements are typically made of stainless steel, (optionally stainless) spring steel, or similar metallic materials. Designs of protective covers in which such shielding elements are combined with bellows are well known. Furthermore, there are so-called bellows-free protective covers in which the shielding elements are in contact with each other in a well-sealed manner. In this manner, depending on the design, at least adequate sealing against the passage of a medium (e.g., coolant / lubricant), chipping, friction, etc. Different applications may inevitably have different requirements regarding tightness.

[0007] The shielding elements are typically arranged in a line and are movable relative to each other in a predetermined manner, resulting in a movable protective cover as a whole. In this way, spindles, robots, tool tables, and similar components in machines can be moved along at least one axis. The protective cover can accommodate transverse motion, and a tight fit is ensured regardless of the position of each movable component. In this way, a protective cover with adjustable length can be realized. Depending on the configuration, assemblies of protective covers can be realized that are designed for transverse motion of components extending through the shielding surface along one axis, two axes, or even three axes. This should not be understood as a limitation.

[0008] A further requirement for protective covers is to provide the maximum possible travel path with the minimum possible closure dimensions (the minimum dimensions with a high packing density of shielding elements). In this way, for example in machine tools, a given installation space can be utilized to the fullest extent.

[0009] Adjacent shielding elements are regularly connected to one another by so-called connecting elements (usually made of plastic), resulting in stability across the direction of movement of the shielding elements (in one or two further spatial directions). The connecting elements can optionally transmit motion between adjacent shielding elements. To define the maximum distance between adjacent shielding elements, at least some of the connecting elements may function as path restrictors.

[0010] It has been shown that assembling connecting elements involves a certain amount of effort. Typically, multiple or numerous connecting elements (possibly different types of connecting elements) are required to form a protective cover, or even a protective assembly with multiple protective covers.

[0011] Often, the assembly of connecting elements in a shielding element is carried out by riveting or a similar method. In this way, the interposition of the shielding element allows two adjacent connecting elements to be connected to each other. For surface bonding and for the introduction of desirable forces, multiple rivets are regularly set for each connecting element, and the effort increases accordingly. The number of rivets required for a protective cover may be successfully within a four-digit range.

[0012] Setting rivets requires a certain level of experience and expertise on the part of the worker. If mistakes are made, correction and repair are only possible with considerable effort. In general, care must be taken during the design and assembly of connecting elements to ensure that the closing dimensions are not compromised. [Prior art documents] [Patent Documents]

[0013] [Patent Document 1] European Patent Application Publication No. 4 140 642 Specification A1 [Patent Document 2] German Patent Application Publication No. 10, 2005 043 604, Specification A1 [Patent Document 3] European Patent Application Publication No. 4 046 747 Specification A2 [Patent Document 4] German Patent Application Publication No. 2022 102 945, Specification U1 [Patent Document 5] German Patent Application Publication No. 10, 2006 018 452, Specification A1 [Overview of the project] [Problems that the invention aims to solve]

[0014] In light of this, the object of this disclosure is to provide a protective cover of adjustable length, comprising a plurality of coupled shielding elements joined to one another via connecting elements, wherein the connecting elements are easy to assemble. The assembly of the connecting elements must allow for a permanent and durable bond. The assembly solution must allow for relatively easy assembly for the purpose of repair. In this case, the spatial requirements (particularly the minimum closed dimension) should not increase, or should only increase slightly. Furthermore, the dynamic behavior of the protective cover should preferably not change, or should only change slightly. [Means for solving the problem]

[0015] According to the first aspect, the present disclosure relates to a protective cover whose length can be adjusted, It comprises a plurality of interconnected shielding elements, each being movable relative to the others and having a cover leg and an operating leg angled relative to the cover leg, The operating legs of adjacent shielding elements are connected to each other by at least one deformable connecting element, At least one of the operating legs is positioned between two connecting elements that are coupled to the operating leg on opposite sides, The present invention relates to a protective cover having a fixing projection which extends for fixing purposes through the opening of the operating leg and through the fixing recess of the second of the two connecting elements.

[0016] The underlying purpose of this disclosure is achieved in this manner.

[0017] According to this disclosure, two adjacent connecting elements can be assembled by interposing a working leg. That is, one or more fixing projections of one connecting element are configured to extend through both the working leg and the fixing recess of the opposite connecting element, and to be fixed therein.

[0018] In this manner, the actuating legs of the shielding element are arranged in a sandwich between two adjacent connecting elements. The connecting element extends between two adjacent actuating legs in each case. In this manner, at least partially positive-locking nesting can be provided without the need for a rivet connection extending through the actuating legs. Therefore, a rivet that extends through the first connecting element, the actuating leg and the second connecting element and positively locks and fixes this connection is not required. Instead, at least one fixing projection formed on the first connecting element extends through the actuating leg and the second connecting element.

[0019] One or more openings may be introduced into the actuating leg, and the fixing projection extends through the opening in the mounted state. The opening can be produced, for example, by laser cutting, punching, or a similar method. In an exemplary embodiment, the opening is non-circular, for example a rectangular or square opening.

[0020] In an exemplary embodiment, (at least one type of) connecting element has a uniform design. This may be effected, for example, in such a way that the connecting element has both a fixing projection and a fixing recess to be coupled to a corresponding connecting element which likewise has such design features (fixing projection and fixing recess). In this manner, chaining can be achieved, wherein one cover leg is arranged between two connecting elements in each case.

[0021] Different types of connecting elements are, for example, so-called transverse stabilizers which act transversely to the shielding surface and transversely to the moving direction during opening and closing of the protective cover, or so-called longitudinal stabilizers which act longitudinally to the shielding surface and transversely to the moving direction during opening and closing of the protective cover.

[0022] In an exemplary embodiment, the connecting element is designed as an injection-molded part made of plastic. Freedom of design is provided in this manner, particularly when forming the fixing projections and the fixing recesses. The connecting elements are generally designed as flat components, however, they are arranged partially deformed and in a folded state. During production by injection molding, the fixing projections may protrude prominently relative to the flat basic shape.

[0023] In an exemplary embodiment, the protective cover is a bellows-free protective cover. In the case of a bellows-free protective cover, the shielding elements are sufficiently close to each other at the cover legs such that dirt or the like cannot pass through the shielding surface formed in this manner (or can only pass within a prescribed limit).

[0024] The shielding elements of the protective cover are arranged side by side while maintaining an overlap between adjacent cover legs. A closed and sufficiently sealed shielding surface is provided in this manner. A plurality of protective covers may surround an opening (for example for a machine component or the like).

[0025] The protective cover may have a plurality or multiple shielding elements arranged side by side. Adjacent shielding elements may be coupled to each other via adjacent connecting elements, which results in a nested design of the shielding elements (having actuating legs) and the connecting elements as a whole. In principle, other connecting elements can also be provided, for example, in the edge region (the first or last shielding element of a row) for coupling the shielding element to an end flange or the like.

[0026] In an exemplary embodiment, the shielding element is movable between a retracted position in which adjacent actuating legs are brought close to each other, and an extended position in which adjacent actuating legs are spaced apart from each other. In this manner, the protective cover can be moved between a closed dimension (minimum length) and its maximum extended length.

[0027] According to an exemplary embodiment, the fixing projection has at least one latching lug that secures the fixing projection to the fixing recess. In this way, the fixing projection can penetrate the fixing recess with the interposition of the operating leg and be fixed in this (mounting) position.

[0028] Positioning by at least one locking claw can serve as an assembly aid and temporary fixation until permanent positioning is achieved by a retaining element. It is also conceivable that, using at least one locking claw, adjacent connecting elements can be permanently joined to each other through the interposition of an operating leg.

[0029] In a further exemplary embodiment, the fixing projection is designed as an arch or pointed arch, allowing a retaining element to pass beneath it. In this embodiment, the position can be fixed by a separate retaining element mounted above a fixing recess that is below the arch and parallel to the working leg. In this way, the fixing projection can be protected from detachment movement through the fixing recess (opposite to the assembly direction).

[0030] The fixing projections form, for example, fixing tabs or fixing holes that can be used for positioning. A fixing projection designed as an arch has, for example, an inverted U-shape or inverted V-shape cross-section, with its legs coupled to a connecting element and its tip or apex penetrating a fixing recess of an adjacent connecting element. According to a further exemplary embodiment, an insertion opening is formed below the fixing projection, into which at least a portion of the fixing projection of an adjacent connecting element penetrates when the protective cover is closed.

[0031] In other words, adjacent working legs can therefore move in particularly close proximity to each other when closed (in their closed dimensions). This is because some of the fixed projections of adjacent connecting elements can engage with each other.

[0032] In other words, the arch tip (or arch apex) can engage from below into the arch opening of an adjacent connecting element. In this way, the fixing projection can protrude considerably beyond the flat (plate-like) basic structure of the connecting element without having a detrimental effect on the closing dimensions.

[0033] The fixing protrusions of adjacent connecting elements can be nested within each other. In other words, the openings of adjacent working legs through which the fixing protrusions extend can be aligned with each other, and therefore adjacent shielding elements can be designed identically. This further reduces manufacturing and assembly effort.

[0034] According to a further exemplary embodiment, the first connecting element has a plurality of fixing protrusions arranged in a row, and the second connecting element has a plurality of fixing recesses arranged in a row, the fixing protrusions extending through the operating leg and the fixing recesses.

[0035] In this manner, a stable and permanent connection with good force introduction can be created, optionally including retaining elements to fix the connection in place. The connecting elements can make contact with fixed legs positioned between them over a wide area.

[0036] According to further exemplary embodiments, the working leg has multiple openings, which correspond to the number of fixed projections and fixed recesses. It is not always necessary to use all elements simultaneously to achieve the coupling. In this way, flexibility is increased.

[0037] According to further exemplary embodiments, guide grooves for retaining elements are formed between two or more adjacent fixing recesses of a second connecting element. In other words, the second connecting element can provide a base for a retaining element that helps to fix its position in the vicinity of the fixing recesses. The retaining element can be inserted into or pushed into the guide grooves in a predetermined manner. In this way, the retaining element can be precisely positioned and fixed in its target position.

[0038] According to a further exemplary embodiment, the fixing recess of the second connecting element has an inclined side surface that fits into the fixing projection of the first connecting element.

[0039] This relates in particular to these sides to which the fixing projections make contact when installed. When the fixing projections have inclined sidewalls and the fixing recesses have corresponding inclined sides, good surface contact is achieved between the fixing projections and the fixing recesses. Furthermore, these components can be pushed together in a way that makes assembly easier. This is because there is initially a large amount of play during insertion. As insertion progresses, the play decreases, and in addition, these components center themselves.

[0040] According to a further exemplary embodiment, the connecting element has two fixing compartments and two connecting legs, which extend between the fixing compartments, the first fixing compartment having one or more fixing protrusions and the second fixing compartment having one or more fixing recesses.

[0041] In this manner, the connecting element can be flat with respect to the working leg having a fixed section. The fixed section may also be called a fixed web.

[0042] A connecting element can function both as a first connecting element and as a second connecting element. In this way, multiple similar connecting elements can be nested or chained together to connect multiple shielding elements to one another.

[0043] According to an exemplary embodiment, an exclusive fixing projection is formed in a first fixing compartment, and an exclusive fixing recess is formed in a second fixing compartment. This simplifies assembly.

[0044] According to further exemplary embodiments, two fixed compartments are coupled in each case to the working legs of adjacent shielding elements on two sides facing opposite each other, the connecting legs being rotatably held between the shielding elements via at least one hinge (particularly a living hinge).

[0045] Living hinges can also be manufactured integrally by injection molding when the connecting elements are produced as injection-molded parts. The connecting elements may be produced by injection molding in a flat (unfolded) state, in which case the working section and connecting legs are oriented substantially parallel to each other. In this way, a relatively simple molding method (open shut molding) can be used.

[0046] Hinges allow for the desired movement / deformation of the connecting elements. When using living hinges, the hinges are significantly thinner than the connecting legs and fixed compartments. On the one hand, this relates to the shape required for assembly (folded state). On the other hand, this relates to the deformation required during the movement of the protective cover when the distance between adjacent working legs of the shielding element changes.

[0047] According to a further exemplary embodiment, the operating legs of three or more adjacent shielding elements are connected via a chain of connecting elements, at least two of which have a first fixed section and a second fixed section. In this way, each first fixed section and each second fixed section can form a chain, connecting to the operating legs on two sides facing opposite each other.

[0048] According to further exemplary embodiments, in the case of the at least two connecting elements, each first fixed section is coupled to a second fixed section of an adjacent connecting element by the interposition of an operating leg. This continuity can be extended as desired. The connecting elements on the edge side of the protective cover may optionally be designed differently.

[0049] In a further exemplary embodiment, the fixing projection forms a fixing hole that protrudes beyond the second connecting element, into which a retaining element can be inserted. In this way, the fixed position / locking in the mounted state can be provided by a separate retaining element. At least a portion of the fixed position is positive locking. From the viewpoint of the first connecting element on which the fixing projection is formed, the retaining element is located behind the second connecting element in the region in which the fixing projection protrudes beyond the second connecting element.

[0050] The fixing holes are not formed by separate parts, but are formed through an integrated design element of the first connecting element. The fixing protrusions are designed as an integral part with the first connecting element, particularly by injection molding.

[0051] According to a further exemplary embodiment, the retaining element is a retaining pin extending through the fixing hole of the first connecting element and supported on the second connecting element. In this manner, the retaining element prevents the fixing projection from disengaging again from the fixing recess.

[0052] The retaining pins are, for example, steel pins. The retaining pins can, in principle, have a simple design (i.e., without a head, collar, or shoulder). It is understood that the end faces of the retaining pins can be rounded or chamfered. In exemplary embodiments, the retaining pins are made of spring steel. This simplifies assembly because, in this way, deformation during assembly is offset by high elasticity. The retaining elements are rod-shaped.

[0053] According to a further exemplary embodiment, the retaining element, specifically designed as a retaining pin, extends through a plurality of fixing holes formed by a plurality of fixing protrusions. For this purpose, the fixing protrusions of the connecting element are aligned with each other, and as a result the fixing holes are aligned, allowing the retaining element to pass through.

[0054] In this manner, similar to a piano hinge, multiple fixing recesses can be permanently and securely connected with multiple fixing protrusions to assemble the two connecting elements to the working leg.

[0055] In exemplary embodiments, two or more fixing protrusions and two or more corresponding fixing recesses are formed on the connecting element. In exemplary embodiments, three or more fixing protrusions and three or more corresponding fixing recesses are formed on the connecting element. In exemplary embodiments, four or more fixing protrusions and four or more corresponding fixing recesses are formed on the connecting element. The retaining element may extend through all of the fixing protrusions, forming fixing holes aligned with each other behind the fixing recesses of adjacent connecting elements.

[0056] It is also conceivable to provide two or more adjacent fixing protrusions in two rows and two or more adjacent fixing recesses in two rows on a single connecting element. This is conceivable, for example, in the case of a connecting element used as a longitudinal stabilizing member. Each row may have at least three or at least four fixing recesses / fixing protrusions, as previously described.

[0057] According to a further exemplary embodiment, the retaining element has a primary extension direction that, in the mounted state, is oriented parallel to the operating leg. Thus, the retaining element does not extend perpendicularly through the operating leg (like a rivet). Rather, the retaining element is parallel to the operating leg on the connecting element (or within a guide groove formed therein) and fixes the fixing projection in its position extending through the fixing recess.

[0058] According to further exemplary embodiments, the second connecting element has at least one position-retaining element that fixes the retaining element in the mounted state. In this way, displacement from at least one fixing hole is prevented, in particular. In other words, the at least one position-retaining element is intended to restrict the axial movement of the (rod-shaped) retaining element. The at least one position-retaining element is aligned with the fixing hole. The at least one position-retaining element may also be called a fastener.

[0059] According to a further exemplary embodiment, the second connecting element has two position-fixing elements spaced apart from each other, and the retaining element is positioned between the two position-fixing elements in the mounted state and thereby extends through the at least one fixing hole. In this way, the retaining element is fixed in both directions along its axial extension. Conversely, assembly / insertion of the retaining element is possible from either direction.

[0060] According to a further exemplary embodiment, the at least one position-fixing element is a protrusion on the second connecting element, aligned with the fixing hole and the attached retaining element. The at least one position-fixing element is integrally formed with the connecting element. In the production of an injection-molded base, the position-fixing element can be easily formed as a protrusion.

[0061] According to further exemplary embodiments, the retaining element overcomes the at least one fixed-position element that is under elastic deformation during assembly. This includes partial elastic deformation. The elastic deformation may relate, for example, to a connecting element having a fixed-position element. The elastic deformation may also relate to the retaining element itself. The retaining element can be mounted under a specified elastic deformation, and then, once relaxation is brought about in the mounted state, additional fixation is brought about. In this case, a degree of freedom of motion that allows assembly is initially restricted in the mounted state.

[0062] In a further aspect, the present disclosure relates to a connecting element for connecting adjacent shielding elements of a protective cover whose length can be adjusted, Two fixed compartments, At least two connecting legs extending between the fixed compartments and At least one fixing projection formed in the first fixing compartment, The second fixed compartment comprises at least one fixed recess formed therein, The at least one fixing projection relates to a connecting element that is fixed for the purpose of fixing and extends through the at least one fixing recess of the second connecting element and through the opening of the working leg of the shielding element positioned between them.

[0063] The underlying purpose of this disclosure is achieved in this manner.

[0064] With the connecting elements attached, at least one fixing projection faces away from the second fixing compartment. Multiple such connecting elements may be arranged in a row with the interposition of working legs to create a protective cover.

[0065] According to an exemplary embodiment of the connecting element, the at least one fixing projection is configured to form a fixing hole that, when mounted, protrudes beyond the second connecting element, into which a retaining element can be inserted.

[0066] According to exemplary embodiments of the connecting element, the at least two connecting legs, and the two fixing sections having at least one fixing projection and at least one fixing recess, are produced integrally together, particularly by injection molding of a plastic material that is processable by injection molding. Deformability of the connecting element may result, for example, from the incorporation of a living hinge, which may also be produced integrally.

[0067] Multiple such connecting elements may function to produce / assemble a protective cover according to one of the embodiments described herein.

[0068] In a further aspect, the present disclosure relates to an assembly device for assembling at least two connecting elements according to any one of the embodiments described herein for connecting adjacent shielding elements of a protective cover, the assembly device comprising: A first jaw portion fitted to the first fixing compartment having at least one fixing projection, The device comprises a second jaw portion fitted to the second fixing section having at least one fixing recess, The first jaw portion and the second jaw portion are joined and connected to each other, and are displaceable between an engaged position and an unengaged position. The present invention relates to an assembly device in which, in the engagement position, the first jaw portion and the second jaw portion press against each other, through the interposition of the operating leg of the shielding element, the first fixing section of the first connecting element and the second fixing section of the second connecting element, and as a result, the at least one fixing projection engages with and extends through the at least one fixing recess.

[0069] Using an assembly device, the first and second jaws are fitted to the first and second fixing sections in such a manner that they can be firmly pressed together by the interposition of the working legs, and as a result, the fixing projections reach their target positions (assembly positions).

[0070] This may also include the latching of the fixing projection in the fixing recess. In addition, or alternatively, fixing holes for retaining elements may be formed in this manner on the rear side of the second fixing compartment.

[0071] According to an exemplary embodiment of the assembly device, an insertion channel is formed in the first jaw portion through which a retaining element, particularly configured as a retaining pin, can be fed, and at the engagement position of the two jaw portions, can be inserted into a fixing hole formed by the at least one fixing projection, thereby the retaining element fixing the attached state of the connecting element by the interposition of the operating leg. In this way, the assembly position can be locked and fixed.

[0072] Assembly is generally understood to be possible without such assembly tools. However, assembly tools can significantly simplify and expedite the assembly process.

[0073] The disclosure further relates to the use of at least one connecting element according to at least one of the embodiments described herein for connecting two adjacent shielding elements of a protective cover, wherein the connecting element is positioned between two adjacent operating legs of the shielding elements and extends through the operating leg and a fixing recess of the connecting element positioned behind it by at least one fixing projection at the first operating leg, and the connecting element is penetrated at the second operating leg in the area of ​​the fixing recess by the fixing projection of the connecting element positioned behind it.

[0074] The retaining element inserted into the resulting fixing hole may also serve to fix the position in each case. Position fixing may also occur as a result of the fixing projection being latched into the fixing recess, for example, by a locking claw formed on the fixing projection.

[0075] It should be understood that the features described above, and the features described below, can be used not only in each of the suggested combinations, but also in other combinations or individually, without departing from the scope of this disclosure. [Brief explanation of the drawing]

[0076] Further features and advantages of the present invention are obtained as a result of the following description and explanation of several exemplary embodiments with reference to the drawings. [Figure 1] This is a schematic front view of a protective assembly having protective covers for two linear axes. [Figure 2] This is a schematic rear view of the protective cover in a partially extended (extended) position. [Figure 3] This is a partially enlarged view of the protective cover shown in Figure 2, which has different types of connecting elements for connecting the working legs of adjacent shielding elements. [Figure 4] This is a detailed perspective view based on Figure 3, illustrating an exemplary design of the combined connecting elements. [Figure 5] This is a perspective view of the connecting element in a flat configuration, which was shown folded in Figure 4. [Figure 6] Figure 5 is a further perspective view of the rear side of the connecting element. [Figure 7] Figures 5 and 6 show perspective views of the connecting element in its folded / deformed state, along with a retaining element that can be used for position fixing. [Figure 8] This is a partial cross-sectional view along the longitudinal extension of the retaining element through the bonding region between two connecting elements. [Figure 9] This is a partial perspective view of the configuration shown in Figure 8. [Figure 10] A further detailed perspective view based on Figure 3 to show a further exemplary embodiment of the combined connecting elements. [Figure 11] This is a simplified diagram based on Figure 10 of a shielding element having an operating leg with multiple openings for joining two connecting elements. [Figure 12] This is a partial cross-sectional view perpendicular to the longitudinal extension of the retaining element, illustrating the closed position of the two connecting elements, with some parts nested. [Figure 13] This is a perspective view of an assembly device for assembling two connecting elements in the disengaged position. [Figure 14] This is a cross-sectional perspective view based on Figure 13, showing the engagement position of the assembly device. [Figure 15] This is an enlarged cross-sectional view based on Figure 14, showing the assembly of the retaining elements. [Modes for carrying out the invention]

[0077] Figure 1 shows an exemplary embodiment of the protective assembly 10 in a schematic front view. The protective assembly 10 partitions the shielding surface 12, and the protective assembly 10 separates the two sides located in front of and behind the shielding surface 12.

[0078] In an exemplary embodiment, the protective assembly 10 is formed by two protective covers 14 and 16. It is understood that the protective covers 14 and 16 can be used individually. Protective assemblies in which three protective covers are combined are also known.

[0079] The protective cover 14 is capable of movement in a first direction of movement (compared to axis 18). The protective cover 16 is capable of movement in a second direction of movement (compared to axis 20), and as a result, a two-dimensional motion along the shielding surface 12 can be represented overall. In this manner, for example, a horizontal axis 18 and a vertical axis 20 can be provided. This should not be understood as a limitation.

[0080] In an exemplary embodiment, the protective cover 14 comprises an outer frame 26 to which two packages of shielding elements 28 and 30 are mounted and guided. In an exemplary embodiment, the protective cover 16 comprises an inner frame 36 to which two packages of shielding elements 40 and 42 are mounted and guided. The protective cover 16 having the inner frame 36 is positioned between the shielding elements 28 and 30 of the protective cover 14. In other words, during the movement of the protective cover 14 along axis 18, the protective cover 16 moves along the space between the shielding elements 28 and 30.

[0081] During the motion of the shielding elements 28 and 30 along axis 18, the first package 28 and the second package 30 are alternately compressed or pulled apart (expanded), respectively. The same applies to the two packages of shielding elements 40 and 42 during their motion along axis 20.

[0082] In exemplary embodiments, the opening 44 is located between the shielding elements 40, 42, and the opening is movable along the first axis 18 and along the second axis 20. For example, when using the protective assembly 10 in a machine tool, a tool spindle assembly (not shown in Figure 1) may extend through the opening 44. When such an assembly or similar component is moved for machining or operational purposes, the protective assembly 10 allows for "entrainment" of the shielding elements 28, 30 and 40, 42 due to its mobility, and therefore allows for maintenance of sealing and shielding along the shielding surface 12. Other applications for protective covers other than those in machine tools are also known. The protective cover does not necessarily have to comprise two opposing packages of shielding elements.

[0083] The features and embodiments of this disclosure will be described below with reference to a detailed schematic diagram of the protective cover 14. It will be understood that the protective cover 16 shown in Figure 1 can also be designed accordingly.

[0084] Figure 2 shows a rear view of the protective cover 14 in an extended position. The rear view in Figure 2 is obtained, for example, when the protective assembly 10 in Figure 1 is viewed from the rear (the area behind the shielding surface 12). Figure 3 shows an enlarged detail of the configuration in Figure 2.

[0085] In an exemplary embodiment, the protective cover 14 has a plurality of shielding elements 28 arranged in adjacent and partially overlapping rows. End flanges 50 are located at the beginning and end of each row, respectively. The end flanges 50 can serve to connect the protective cover 14 to the frame side. Furthermore, the actuation force for moving the protective cover 14 can be introduced through the end flanges 50. For example, the first end flange 50 may be fixed to the frame, and the second end flange 50 may be movably positioned along the axis 18 relative to the first end flange 50. When multiple protective covers 14, 16 (compared to Figure 1) are combined, at least one of the protective covers 14, 16 may be floatingly attached by its flange. This is the case when the frame 36 of the protective cover 16 is interlocked as a whole during the movement of the other protective cover 14.

[0086] Each shielding element 28 has a cover leg 52 and an operating leg 54. The cover legs 52 together form a shielding surface 12 (compared with Figure 1). The shielding elements 28 of the protective cover 14 are usually of a similar design and at least partially identical. This does not preclude the outer shielding elements 28 coupled to the end flange 50, for example, from having a different design.

[0087] The cover legs 52 and actuation legs 54 of the shielding element 28 are typically oriented substantially in an L-shape relative to each other. In exemplary embodiments, the actuation legs 54 have substantially flat and linear extensions. In exemplary embodiments, the cover legs 52 are contoured at least in cross-section. In this manner, when the overlapping cover legs 52 of adjacent shielding elements 28 come into contact with each other in a defined manner and optionally with pretension, the sealing effect of the protective cover 14 on the shielding surface 12 can be increased.

[0088] The working legs 54 of the shielding elements 28 function to receive connecting elements 60, 62 that connect the shielding elements 28 to each other and stabilize them in their positions relative to each other. Figures 2 and 4 show a first type of connecting element 60 and a second type of connecting element 62 that combine to connect adjacent shielding elements 28 to each other. The connecting elements 60, 62 are typically formed from (optionally fiber-reinforced) plastic material, for example by injection molding.

[0089] The connecting elements 60 and 62 can also be called stabilizing members. The connecting elements 60 and 62 are deformable in a specified manner (joined) via living hinges or other types of joints when the protective cover 14 moves and therefore adjacent shielding elements 28 move relative to each other.

[0090] In the exemplary embodiments shown in Figures 2 and 3, the connecting elements 60 and 62 are roughly shaped like a gable roof, with the roof slope being variable depending on the distance between two adjacent working legs 54. In the exemplary embodiments, the maximum possible distance between two adjacent working legs 54 corresponds to a flat roof slope. It is understood that other designs for the connecting elements 60 and 62 are also fundamentally possible.

[0091] The connecting element 60 stabilizes the adjacent shielding element 28 in a direction lateral to the shielding surface 12 (compared to the bidirectional arrow 64 in Figure 3). Therefore, the connecting element 60 can also be called a lateral stabilizing member. The connecting element 62 stabilizes the adjacent shielding element 28 in a direction longitudinal to the shielding surface 12 and perpendicular to the direction of movement (axis 18) (compared to the bidirectional arrow 66). The connecting element 62 can also be called a longitudinal stabilizing member.

[0092] The connecting elements 60 and 62 are joined together to form a chain, and in each case, the pivot joint is formed by a living hinge, as in the exemplary embodiment. In the exemplary embodiment, the connecting elements 60 and 62 are designed as a single unit and are deformable in a specified manner. Different design elements can be relatively easily integrated into the connecting elements 60 and 62 during injection molding production. This can be used to simplify the assembly of the protective cover 14 when multiple or numerous shielding elements 28 are joined together using a corresponding number of connecting elements 60 and 62.

[0093] In the exemplary embodiment shown in Figure 2, two adjacent shielding elements are connected to each other by one (centrally located) connecting element 62 and four connecting elements 60, respectively. Two of the connecting elements 60 are located in front of and behind the connecting element 62, respectively, along the longitudinal extension of the shielding element 28. The arrangement shown in Figure 2 should not be understood as limiting. Depending on the desired dimensions of the protective cover 14 and the functional requirements for the protective cover 14, more or fewer connecting elements 60, 62 may be provided.

[0094] In the following, exemplary embodiments and methods for assembling the connecting elements 60 and 62 will be illustrated and described in more detail with reference to Figures 4 to 12. Although Figures 4 to 9 relate to the connecting element 60, this should not be considered limiting. This description also applies to the connecting element 62, which is illustrated in Figure 10.

[0095] The connecting elements 60 shown in Figure 4 are linked to each other in a chain-like manner, with one operating leg 54 of the shielding element 28 positioned between two adjacent connecting elements 60 in each case.

[0096] Figures 5 and 6 show the connecting element 60 in a flat state immediately after production, for example, by injection molding. As a result, in exemplary embodiments, the connecting element 60 is formed from a thermoplastic material that can be processed by injection molding. This material is fiber-reinforced if necessary.

[0097] Based on Figures 5 and 6, Figure 7 shows the folded shape of the connecting element 60, assuming it is at least in an approximately attached state (Figure 4). The connecting element 60 changes its shape during the movement of the protective cover 14. The connecting element 60 is deformable.

[0098] In an exemplary embodiment, each connecting element 60 has two connecting legs 70, 72 extending between fixed sections 74, 76, which are located at the edges. A hinge 78 is formed between the two connecting legs 70, 72, thereby allowing the connecting legs 70, 72 to rotate relative to each other. Similarly, a hinge 78 is formed between a connecting leg 70 and a fixed section 74. Similarly, a hinge 78 is formed between a connecting leg 72 and a fixed section 76. The hinges 78 can be produced, for example, as living hinges (i.e., as integrally designed joints). Rotational movement is also made possible between the connecting legs 70, 72 and their respective adjacent fixed sections 74, 76. The connecting element 62 (compared to Figure 10) can also be designed in accordance with the connecting legs 70, 72 and the fixed sections 74, 76.

[0099] Fixing protrusions 82 are formed in the fixing compartment 74. Fixing recesses 84 are formed in the fixing compartment 76, and their number and shape are consistent with the fixing protrusions 82. Please compare in particular with Figures 5 to 7.

[0100] In the fixed sections 74 and 76, the connecting element 60 contacts the working leg 54. One working leg 54 is positioned between two adjacent connecting elements 60 in each case. One connecting element 60 is positioned between two adjacent working legs 54 in each case. The fixing projections 82 and fixing recesses 84 of the adjacent connecting elements 60 are aligned with each other to enable connection.

[0101] When installed, the fixing projections 82 extend into the fixing recesses 84 of the adjacent connecting element 60. In an exemplary embodiment, each fixing projection 82 is designed as an arch 88 that rises from the fixing compartment 74. When installed, the arches 88 protrude partially beyond the fixing compartment 76 of the adjacent connecting element 60. As a result, the fixing projections 82 form fixing holes 90 behind the adjacent fixing compartment 76. This allows for position fixing to lock the installed state.

[0102] In the exemplary embodiments shown in Figures 4 to 9, the connecting element 60 has four fixing protrusions 82 and four fixing recesses 84 in fixing sections 74 and 76 facing opposite directions, which interact with the corresponding elements of adjacent connecting elements 60. It is understood that a number other than four may also be provided.

[0103] Figures 4, 8, and 9 show the mounted state with the retaining element 94 passing through the fixing hole 90. In this way, the fixing projection 82 is fixed within the fixing recess 84. The mounted state is thus locked.

[0104] The retaining element 94 is designed, for example, as a retaining pin 96. In exemplary embodiments, the connecting element 60 is formed of plastic, particularly by injection molding. The shielding element 28, having the working legs 54, is formed of steel plate (e.g., spring steel plate). The retaining element 94 is, for example, a steel pin (particularly formed of spring steel).

[0105] The retaining element 94 may be fixed in place by the position-fixing element 100 to prevent unintended detachment of the retaining element 94. Figure 9 shows an exemplary embodiment in which two position-fixing elements 100 are provided, with the retaining element 94 positioned between them. The position-fixing element 100 is designed, for example, as a protruding portion 102 that rises on the fixing section 76. Therefore, the position-fixing element 100 can be designed as an integral component of the connecting element 60.

[0106] Figures 4, 5, and 9 further illustrate a design in which at least some of the fixing protrusions 82 are provided with locking claws 106, thereby ensuring that the fixing protrusions 82 can latch into their positions when engaged within the fixing recesses 84. In this manner, at least temporary positioning is provided between the two adjacent connecting elements 60. In exemplary embodiments, the locking claws 106 simplify the subsequent assembly of the retaining elements 94. It is also conceivable that the locking claws 106 ensure complete and permanent positioning of the fixing protrusions 82 in their positions when engaged within the fixing recesses 84. In such a case, additional retaining elements 94 are not necessarily required.

[0107] Figure 5 shows that in an exemplary embodiment, the fixing projection 82 has an inclined side wall 110. The cross-section of the fixing projection 82 is accordingly (inverted) U-shaped or V-shaped. Compare with Figure 12. The fixing recess 84 correspondingly has an inclined side surface 112 that fits the inclined side wall 110. In this way, insertion of the fixing projection 82 into the fixing recess 84 is simplified. Similarly, in the engaged state, a favorable contact (surface contact) is brought between the fixing projection 82 and the fixing recess 84 of the adjacent connecting element 60.

[0108] As shown in Figures 6 and 7, in an exemplary embodiment, the guide groove 116 is formed in a fixed section 76 associated with the fixed recess 84. The guide groove 116 provides a base for the retaining element 94. In an exemplary embodiment, the guide groove 116 extends between two position-fixing elements 100 facing opposite directions.

[0109] In the enlarged view of Figure 9, which relates to Figure 8, the retaining element 94 is located within the guide groove 116, and therefore the guide groove 116 is not visible in Figures 8 and 9. The guide groove 116 is fitted to the retaining element 94 (particularly its diameter). The same applies to the fixing holes 90 provided by the fixing projections 82. In this way, favorable contact is brought between the retaining element 94 and the connecting element 60, and excessive loading of the plastic material having a high local load peak is avoided. In this way, undesirable creep can be avoided.

[0110] In Figures 6 and 8, the rear / lower insertion opening of the fixing projection 82, which is designed here as an arch 88, is further indicated by 120. The insertion opening 120 allows at least partial engagement of the tip of the fixing projection 82 with the adjacent connecting element 60. This will be further explained below in relation to Figure 12.

[0111] In Figure 7, the retaining element 94 is shown in an unattached state. The retaining element 94 extends in a rod shape along the main extension direction 124. When attached, the main extension direction 124 is aligned with the fixing hole 90 and the position fixing element 100. Compare with Figures 8 and 9.

[0112] The partial cross-sectional view in Figure 8 shows that the fixing projection 82 starts from the fixing section 74 and extends through the opening 130 of the working leg 54 and the fixing recess 84 of the fixing section 76 of the adjacent connecting element 60. For position fixing, the retaining element 94 is inserted into the fixing hole 90.

[0113] The configuration of the connecting element 60 shown in Figures 4 to 9 is also suitable for a shielding element 28 having an operating leg 54 whose width in the direction transverse to the shielding surface 12 (compared to the bidirectional arrows in Figure 3) is smaller than the possible overlapping length of the connecting element 60. Referring to Figures 4, 8 and 9, in such a design with a “short” operating leg 54, in order to fix two adjacent connecting elements 60 to the operating leg 54, for example, only two of the four fixing protrusions 82 will extend through the opening of the operating leg 54. Then, the section of the connecting element 60 will protrude beyond the operating leg 54. The two remaining fixing protrusions 82 may each still extend through the fixing recesses 84, but not through the operating leg 54. Thus, only two of the four pairs of fixing protrusions 82 and fixing recesses 84 will be “occupied”.

[0114] It should be understood that the numbers and ratios mentioned above (two out of four pairs) are merely illustrative. In general, it is not necessary for all fixed projections 82 to extend through the openings of the working legs. The connecting elements 60 may protrude beyond the working legs 54. Even with such a design, adjacent shielding elements 28 can be securely and permanently coupled to one another.

[0115] Supplementing Figures 4-9, Figures 10 and 11 show a basically similar design for a connecting element 62 for connecting adjacent working legs 54. The connecting element 62 has connecting legs 70, 72 and fixed sections 74, 76. A fixing projection 82 is formed in the fixed section 74. A fixing projection 84 is formed in the fixed section 76. The fixing projection 82 may engage with the fixing projection 84 of an adjacent connecting element 62, in which case the working legs 54 of the shielding element 28 are positioned between them. Figure 11 shows the shielding element 28, in which a number of openings 130 are introduced into its working legs 54. During assembly, the fixing projections 82 are inserted through the openings 130.

[0116] In Figures 10 and 11, the connecting element 62 has two rows of four fixing protrusions 82 in the fixing section 74, each offset from each other in the longitudinal direction, and two rows of four fixing recesses 84 in the fixing section 76, each offset from each other in the longitudinal direction. Other designs are conceivable. It is understood that similar, or even identical, designs can be used as a basis for the connecting elements 60 and 62 as alternatives to different designs of the connecting elements 60 and 62. In that case, the connecting elements 60 and 62 would be essentially different in their function and orientation (lateral and longitudinal stabilizing members) at their mounting position on the working leg 54.

[0117] Figure 12 illustrates the function of the insertion opening 120 located below the fixing projections 82 of the connecting elements 60, 62. This has already been described in relation to Figures 6 and 8. A configuration in which adjacent working legs 54 are spaced at least slightly apart from each other and the protective cover 14 is extended at least partially is shown by 136. A configuration in which the protective cover 14 is fully retracted (closed dimension or closed position) is shown by 138.

[0118] In the closed position, adjacent working legs 54 are moved as close to each other as possible. The insertion opening 120 on the underside of the fixing projection 82 provides space into which adjacent fixing projections 82 can move at least partially when the protective cover 14 is in the closed position. In this way, the minimum distance between adjacent working legs 54 can be minimized, even if at least the fixing projections 82 protrude significantly beyond their respective fixing compartments 74.

[0119] Referring to Figures 13 to 15, an embodiment of the assembly device 140 for assembling two adjacent connecting elements 60 and 62 with the interposition of the working leg 54 will be described.

[0120] The assembly tool 140 is designed in the shape of pliers. The assembly tool 140 has a first jaw 142 and a second jaw 144. The jaws 142 and 144 are shown in the (spaced) disengaged position in Figure 13. The jaws 142 and 144 are shown in the (closed) engaged position in Figures 14 and 15. The movement of the jaws 142 and 144 between the disengaged and engaged positions is performed here using the joining mechanism 150. The first jaw 142 fits into the fixing section 74 of the first connecting elements 60, 62. The second jaw 144 fits into the fixing section 76 of the second connecting elements 60, 62.

[0121] When the two jaws 142, 144 are brought to the engagement position, the two fixing sections 74, 76 of the adjacent connecting elements 60, 62 are pressed against each other, as a result the fixing projection 82 engages with the fixing recess 84 and protrudes beyond them in the final assembled position. In this manner, in the exemplary embodiment, several aligned fixing holes 90 are provided between the fixing projection 82 of the first connecting elements 60, 62 and the fixing sections 76 of the second connecting elements 60, 62.

[0122] In the engagement positions shown in Figures 14 and 15, the retaining element 94 can be further introduced ("passed through") the insertion channel 154 into the fixing hole 90 and into the guide groove 116 formed in the fixing section 76 (if any). This can be done using (temporary) elastic deformation. The deformation may occur in the retaining element 94 itself. However, the temporary deformation may also occur in the connecting elements 60 and 62, and, if possible, even in the operating leg 54.

[0123] In the exemplary embodiment shown in Figure 15, the assembly device 140 pushes the fixing compartment 76, and in particular the position fixing element 100, to the side at least temporarily with the second jaw portion 144, thereby allowing the retaining element 94 to be introduced into the fixing hole 90 and guide groove 116 via the insertion channel 154.

[0124] The assembly device 140 facilitates the fastening of the connecting elements 60 and 62 to the shielding element 28 of the protective cover 14. In this manner, assembly and any repairs in this area are simplified. It is understood that the assembly of the connecting elements 60 and 62 may also be performed by other devices / auxiliary devices.

Claims

1. Multiple interconnected shielding elements (28, 30) are movable relative to each other and each has a cover leg (52) and an operating leg (54) angled relative to the cover leg (52); 40, 42) and adjacent shielding elements (28, 30; The operating legs (54) of 40, 42) are connected to each other by at least one deformable connecting element (60, 62), at least in part, to shielding elements (28, 30; 40, 42) equipped, At least one of the operating legs (54) is positioned between two connecting elements (60, 62) that are coupled to the operating leg (54) on opposite sides. A length-adjustable protective cover (12, 14) has a fixing projection (82) that extends for fixing purposes through the opening (130) of the working leg (54) and through the fixing recess (84) of the second of the two connecting elements (60, 62).

2. The protective cover (12, 14) according to claim 1, wherein the fixing projection (82) has at least one locking claw (106) that fixes the fixing projection (82) in the fixing recess (84).

3. The protective cover (12, 14) according to claim 1 or 2, wherein the fixing projection (82) is formed as an arch (88) or pointed arch, which can pass beneath it to a retaining element (94).

4. The protective cover (12, 14) according to any one of claims 1 to 3, wherein an insertion opening (120) is formed below the fixing projection (82), and the fixing projection (82) of the adjacent connecting element (60, 62) penetrates through it at least partially when the protective cover (12, 14) is closed.

5. The protective cover (12, 14) according to any one of claims 1 to 4, wherein the first connecting element (60, 62) has a plurality of fixing protrusions (82) arranged in a row, and the second connecting element (60, 62) has a plurality of fixing recesses (84) arranged in a row, and the fixing protrusions (82) extend through the operating leg (54) and through the fixing recesses (84).

6. The protective cover (12, 14) according to any one of claims 1 to 5, wherein guide grooves (116) for retaining elements (94) are formed between two or more adjacent fixing recesses (84) of the second connecting elements (60, 62).

7. The protective cover (12, 14) according to any one of claims 1 to 6, wherein the fixing recess (84) of the second connecting element (60, 62) has an inclined side surface (112) that fits onto the fixing projection (82) of the first connecting element (60, 62).

8. The protective cover (12, 14) according to any one of claims 1 to 7, wherein the connecting element (60, 62) has two fixed compartments (74, 76) and two connecting legs (70, 72) extending between the fixed compartments (74, 76), the first fixed compartment (74) having one or more fixed projections (82) and the second fixed compartment (76) having one or more fixed recesses (84).

9. The protective cover (12, 14) according to claim 8, wherein the two fixed sections (74, 76) are each coupled on two sides facing opposite each other to the working legs (54) of adjacent shielding elements (28, 30; 40, 42), and the connecting legs (70, 72) are rotatably held between the shielding elements (28, 30; 40, 42) via at least one hinge (78), particularly a living hinge.

10. The protective cover (12, 14) according to claim 8 or 9, wherein the operating legs (54) of three or more adjacent shielding elements (28, 30; 40, 42) are connected by a chain of connecting elements (60, 62), and at least two of the connecting elements (60, 62) have a first fixed compartment (74) and a second fixed compartment (76).

11. The protective cover (12, 14) according to claim 10, wherein in at least two connecting elements (60, 62), the first fixed section (74) of each is coupled to a second fixed section (76) of an adjacent connecting element (60, 62) by the interposition of an operating leg (54).

12. The protective cover (12, 14) according to any one of claims 1 to 11, wherein the fixing projection (82) forms a fixing hole (90) that protrudes beyond the second connecting elements (60, 62), into which a retaining element (94) can be inserted.

13. The protective cover (12, 14) according to claim 12, wherein the retaining element (94) is a retaining pin (96) that extends through the fixing hole (90) of the first connecting element (60, 62) and is supported on the second connecting element (60, 62).

14. The retaining element (94), which is specifically configured as a retaining pin (96), extends through a plurality of fixing holes (90) formed by a plurality of fixing protrusions (82), the protective cover (12, 14) according to claim 12 or 13.

15. The protective cover (12, 14) according to any one of claims 12 to 14, wherein the retaining element (94) has a main extension direction (124) that is oriented parallel to the operating leg (54) in the state in which the retaining element (94) is mounted.

16. The protective cover (12, 14) according to any one of claims 12 to 15, wherein the second connecting elements (60, 62) have at least one position-fixing element (100) for fixing the retaining element (94) in the attached state.

17. The protective cover (12, 14) according to claim 16, wherein the second connecting element (60, 62) has two position-fixing elements (100) spaced apart from each other, and the retaining element (94) is positioned between the two position-fixing elements (100) in the mounted state and thereby extends through the at least one fixing hole (90).

18. The protective cover (12, 14) according to claim 16 or 17, wherein the at least one position-fixing element (100) is a protrusion (102) on the second connecting element (60, 62) that is aligned with the fixing hole (90) and the attached retaining element (94).

19. The retaining element (94) overcomes the at least one position-fixing element (100) that is elastically deformed during assembly, the protective cover (12, 14) according to any one of claims 16 to 18.

20. The interposition of the working legs (54) of the shielding elements (28, 30, 40, 42) makes the laminate formed by the first fixed section (74) of the first connecting elements (60, 62) and the second fixed section (76) of the second connecting elements (60, 62) elastically deformable, so that the retaining element (94) overcomes the at least one position-fixing element (100) during assembly, as described in claim 19.

21. Connecting elements (60, 62) for connecting adjacent shielding elements (28, 30; 40, 42) of a protective cover (12, 14) with adjustable length, Two fixed sections (74, 76), It comprises at least two connecting legs (70, 72) extending between the fixed sections (74, 76), The first fixing section (74) is characterized by at least one fixing projection (82) formed in the first fixing section (74) and at least one fixing recess (84) formed in the second fixing section (76), The at least one fixing projection (82) is for fixing purposes and extends through the at least one fixing recess (84) of the second connecting element (60, 62) and through the opening (130) of the working leg (54) of the shielding element (28, 30; 40, 42) positioned between them, connecting element (60, 62).

22. The connecting elements (60, 62) according to claim 21, wherein the at least one fixing projection (82) is configured to form a fixing hole (90) that protrudes beyond the second connecting elements (60, 62) when installed, into which a retaining element (94) can be inserted.

23. The connecting element (60, 62) according to claim 21 or 22, wherein the two connecting legs (70, 72), and the two fixing sections (74, 76) having at least one fixing projection (82) and at least one fixing recess (84), are produced integrally together by injection molding, in particular, from a plastic material that is processable by injection molding.

24. An assembly device (140) for assembling at least two connecting elements (60, 62) according to any one of claims 21 to 23 for connecting adjacent shielding elements (28, 30; 40, 42) of protective covers (12, 14), A first jaw portion (142) fitted into the first fixing compartment (74) having at least one fixing projection (82), The device comprises a second jaw portion (144) fitted into the second fixing section (76) having at least one fixing recess (84), The first jaw portion (142) and the second jaw portion (144) are joined and connected to each other, and are displaceable between an engaged position and an unengaged position. In the engagement position, the first jaw portion (142) and the second jaw portion (144) press against each other by the interposition of the operating leg (54) of the shielding element (28, 30; 40, 42) of the first connecting element (60, 62) and the second fixing portion (76) of the second connecting element (60, 62), so that the at least one fixing projection (82) engages with and extends through the at least one fixing recess (84), the assembly device (140).

25. An insertion channel is formed in the first jaw portion (142) through which a retaining element (94), particularly configured as a retaining pin (96), can be fed, and at the engagement position of the two jaw portions (142, 144), it can be inserted into a fixing hole (90) formed by the at least one fixing projection (82), so that the retaining element (94) fixes the attached state of the connecting elements (60, 62) by the interposition of the operating leg (54), as described in claim 24, the assembly device (140).

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