Cable guide device and modular end fixings with flexible covering for cleanroom applications

Description

[0001] The invention relates generally to cable management devices for lines, such as cables, hoses or the like, in particular in a cleanroom application, namely cable management devices that are movable back and forth, forming a deflection arc between two sections that originate from a first end and a second end.

[0002] The invention relates in particular to improved end fixings for such dynamic cable routing devices.

[0003] Cable management devices for cleanroom applications typically have one or more elongated and flexible sheaths, which usually feature channel-like receptacles for cables that extend continuously in the longitudinal direction and lie side by side in the transverse direction. Such tubular sheaths or their receptacles are also referred to as "pods" and, among other things, protect against the escape of abrasive particles generated during cable movement.

[0004] For most applications, a first end-terminating device is provided for the first end and a second end-terminating device for the second end of the cable guides. The end-terminating devices serve to connect the ends to one of two connection points, e.g., a machine, where at least one of the connection points is movable relative to the other.

[0005] Examples of such cable routing devices with specially suitable end fastening devices are described in DE 10 2012 100 290 B4 or in EP 3 226 252 A1.

[0006] An end-fastening device according to the preamble of claim 1 is described in utility model DE 20 2019 103 276 U1 and the subsequently published international patent application with application number PCT / IB2020 / 000047 (see FIG. 13A-13D therein). In this device, each end-fastening device has at least two clamping plates with main surfaces for exerting a clamping force, wherein the clamping plates can each be arranged with a main direction perpendicular to the longitudinal direction of the sheath(s) or the guided cables. Furthermore, two strain relief elements are provided between each pair of clamping plates, each with a clamping surface for one or more cables within its dustproof sheath. The strain relief elements are arranged opposite each other between the facing main surfaces of the clamping plates and hold the sheath together with the cable in a force-fit longitudinal direction, in particular to relieve the cables of tensile force.

[0007] In the end fastening according to DE 20 2019 103 276 U1 or PCT / IB2020 / 000047, each clamping plate has two holding areas, each of which holds a strain relief element parallel to the main surface, i.e., against displacement in the longitudinal direction of the cables. The holding areas are provided as continuous elongated holes in the clamping plates, extending in the main direction of the clamping plates. The strain relief elements project into these elongated holes with corresponding projections and are thereby secured in the longitudinal direction, i.e., perpendicular to the main direction of the clamping plates. Clamping plates with an elongated hole as a holding area and a comparable function are also described, for example, in DE 10 2012 100 533 B4 (see, for example, FIGS. 8-9), although there they are for individual strain relief elements positioned side by side.

[0008] The clamping plates are typically connected to each other by means of screw connections on both sides, e.g. clamped against each other, and also attached to the connection point, e.g. the machine or system to be supplied.

[0009] Using the strain relief elements, a force-fit, in particular a frictional fit, is exerted on the coverings and the cables guided therein via the clamping surfaces, so that these are fixed in the longitudinal direction by means of the end fastening at the respective connection point, whereby the cables are strain-relieved.

[0010] A disadvantage of known devices lies in the relatively complex handling of the end fittings during assembly and disassembly. The end fittings must be regularly disassembled and reassembled for maintenance purposes, especially when cables need to be replaced, due to their limited lifespan caused by the cycles of movement. When the clamping or screw connections are loosened, known end fittings, such as those described in DE 10 2012 100 533 B4, disintegrate into numerous individual parts and must therefore be properly arranged and held before being tightened. This disadvantage is particularly pronounced when the cable management device comprises several superimposed layers of sheathing or is intended to guide a large number of cables.

[0011] A further disadvantage is that known end fixings are only conditionally suitable for widely varying pipe diameters; this applies in particular to the simplified design according to DE 20 2019 103 276 U1. Other end fixings are known from DE 14 40 738 A1.

[0012] One object of the invention is therefore to propose a design for the end fastening that facilitates handling and yet can be better adapted, particularly modularly, to different pipe diameters. According to a first aspect of the invention, this is achieved by an end fastening device according to claim 1.

[0013] In an end-fastening device according to the preamble of claim 1, it is proposed according to the invention that the holding area of ​​the clamping plate forms an undercut profile cross-section, viewed in cross-section perpendicular to the main direction, i.e., a profile cross-section with at least one undercut. According to the invention, the strain relief elements each have at least one corresponding connection area, which is designed for positive engagement behind the undercut(s) and corresponds to or interacts with the profile cross-section of the holding area.

[0014] By interlocking the connection areas of the strain relief elements in or on the clamping plates, the strain relief element can also be reliably held in a direction perpendicular to the main surface on the respective clamping plate.

[0015] This design offers the particular advantage that, before or after tightening or removing a clamping plate, the strain relief elements are held in a predetermined manner or arrangement on the clamping plate, meaning that the final fastening is easier to handle. In particular, it prevents the components from falling apart into separate parts, which would otherwise require time-consuming reassembly to fit the cable arrangement.

[0016] This is particularly advantageous not only, but especially in applications with multiple layers of cables or coverings and / or with a large number of different modular strain relief elements, which are, for example, each adapted to the cable diameters.

[0017] Furthermore, the interlocking connection between the strain relief element and the clamping plate can also improve force transmission, particularly in the longitudinal direction, and minimize play, thereby reducing abrasion in the end fixing itself. Tests have shown that, during operation, a higher level of particle shedding is typically measurable at the end fixings than at the tubes or the deflection bend.

[0018] In contrast to DE 20 2019 103 276 U1 or PCT / IB2020 / 000047, an advantageous embodiment features several individual modular strain relief elements on each terminal plate. In this further development, the individual strain relief elements are designed for arrangement in opposing rows between the main surfaces of the terminal plates, with several strain relief elements side by side in each row along the main direction. This allows different strain relief elements, each modularly suited to the desired cables, to be used and pre-assembled on a terminal plate.

[0019] Furthermore, special fastening elements can be used to secure optional additional support chains at their ends. These fastening elements preferably also have connection areas that – similar to those of the strain relief elements – are designed to interact with the profile cross-section of the clamping plates.

[0020] A number of strain relief elements and fastening elements can thus be attached modularly or selectively and captive to a clamping plate to form a pre-assembled unit with the clamping plate.

[0021] Strain relief elements for cables can be designed on their respective clamping surfaces, for example, with a type of serration featuring protruding teeth extending longitudinally along the cables, or in the form of a comb with individual, elongated teeth, to ensure a good frictional connection for strain relief while simultaneously allowing for deformability that makes the strain relief element suitable for a range of cable diameters. The strain relief elements can also be designed, for example, to form a semi-shell-shaped recess with a concavely curved clamping surface, which allows for the most suitable and mechanically advantageous strain relief of the cables in the longitudinal direction, possibly including the corresponding receiving channel of the sheathing, through frictional engagement and, if necessary, a clamping connection.The design of the clamping surface is not crucial for the invention; any suitable shape is acceptable that secures the corresponding cable in the respective sheath in the longitudinal direction, at least by means of frictional engagement. The clamping surface facing the cables can be provided on a front main surface of the strain relief element, which is opposite a rear main surface with the connection area.

[0022] The connection areas of the strain relief elements or optional fastening elements for support chains are designed, according to the first aspect, for a positive-locking engagement in the undercut profile cross-section of the holding area of ​​the associated clamping plate, so that the element is held in the longitudinal direction of the cables, i.e., perpendicular to the main direction of the clamping plate, and simultaneously in a direction perpendicular to the main plane of the clamping plate. The elements are preferably detachably connected to a clamping plate, in particular detachably transversely to the longitudinal direction of the cables.

[0023] The strain relief elements are preferably one-piece and made of plastic, in particular a single piece of a relatively soft plastic, especially a thermoplastic, with a strength or hardness similar to that of the flexible covering material. The strain relief elements can be made of a suitable plastic, especially a thermoplastic, with a Shore hardness in the range of 20 Shore A (ShA 20) to 65 Shore D (ShD 65), particularly in the range of 50 Shore A (ShA 50) to 100 Shore A (ShA 100). This prevents damage to the covering and minimizes abrasion caused by frictional engagement with the covering. In particular, the strain relief elements are preferably made of a softer material and / or have a more easily deformable shape than the clamping plates that are intended to transmit a clamping force to the strain relief elements.

[0024] The clamping plates are preferably dimensionally stable, particularly rigid in bending, through suitable dimensioning and / or material selection. The clamping plate has two long end faces and, in particular, two short narrow sides and can have a substantially rectangular plan view.

[0025] In a preferred embodiment, the profile cross-section of the clamping plate is designed to open laterally to the outside on at least one of its short narrow sides, and preferably on both short narrow sides. This allows the strain relief elements to be easily inserted and positioned on one or both narrow sides of the clamping plate, with the connection areas facing the cables, in a transverse or lateral direction. Alternatively, attachment by twisting, similar to a bayonet coupling or the like, is also conceivable.

[0026] Particularly preferably, the clamping plate is designed such that the profile cross-section extends over at least a predominant proportion of the length, preferably over the entire length of the clamping plate, so that a large number of positionings of the strain relief elements are possible.

[0027] Preferably, at least the profile cross-section is consistent over the entire length of the clamping plate or in the main direction. The clamping plate can have a consistent outer contour in cross-section over its entire length or in the main direction. This allows clamping plates, for example, to be manufactured inexpensively and to size from long profile sections. The contour can be planar or flat, particularly on both main sides, in the front view or longitudinal section.

[0028] According to the invention, the clamping plate, which typically has two long end faces (long sides) parallel to the main direction, has a profile cross-section formed by an end-face groove on or in each of the two end faces, wherein the groove is preferably designed to be mirror-symmetrical to a central plane of symmetry that may lie parallel to the main surface. Corresponding connection areas are provided on the strain relief elements, preferably engaging both opposite end faces. These can then engage oppositely in the corresponding end-face grooves in a claw- or clamp-like manner to achieve the desired holding effect.

[0029] By securing the elements on both sides of the clamping plates, a particularly stable hold of the elements on the clamping plates is achieved, i.e., displacements or relative movements between elements and the associated clamping plates, e.g. due to tensile and shear forces when moving the movable end mounting back and forth, are minimized, so that abrasion and resulting particles can also be minimized.

[0030] Particularly, but not exclusively, in end-face clamping areas on the clamping plates, it is advantageous if the strain relief elements project longitudinally beyond the clamping plate on each end face, at least on the free side of the end fastening device facing away from the connected cable run, preferably on both sides. This creates edge protection for the cables above the edge of the clamping plates, thereby protecting the cables and further minimizing potential abrasion.

[0031] Connection areas on the strain relief elements are particularly preferred, as they engage both ends of the clamping plate and / or simultaneously form a continuous edge protection across the width of the element, perpendicular to the longitudinal direction. By arranging such strain relief elements in a row, continuous edge protection in the transverse direction can be achieved in combination with a stable connection between the elements and the clamping plate. Optional fastening elements for support chains or optional spacers can also be designed with corresponding connection areas featuring edge protection.

[0032] In one embodiment, each clamping plate has two opposing main surfaces, and a holding area for strain relief elements is provided on each of these two main surfaces. Each holding area forms a profile cross-section with an undercut perpendicular to the main direction, with both profile cross-sections preferably having identical shapes. This allows strain relief elements and fastening elements to be selectively attached and held on either side.

[0033] In an embodiment with retaining areas on both sides, the two retaining areas are arranged on the clamping plate offset from each other longitudinally or perpendicular to the main direction. The retaining areas can preferably be arranged rotationally symmetrically to a main central axis of the clamping plate, so that appropriately designed strain relief elements can be used equally on both sides of the clamping plate simply by turning them over. Preferably, the retaining areas or profile cross-sections are arranged centrally in one of two halves of the width of the clamping plate, the two halves of the width of the clamping plate being rotationally symmetrical to each other. Here, a half of the width refers to a half after being bisected along its length.

[0034] In a preferred embodiment, the holding area(s) can be designed to be mirror-symmetrical, in particular with respect to a central plane of symmetry perpendicular to the main surface, i.e., in particular with two mirror-symmetrical undercuts. This further simplifies handling, especially for holding areas arranged centrally.

[0035] Alternatively, or possibly additionally, each holding area can be provided with a profile groove that is recessed relative to the main surface and / or a profile projection that protrudes relative to the main surface. This can be designed, for example, in the center of the main surface or in the center of one half of the width, e.g., as a profile groove extending continuously in the main direction.

[0036] In principle, a profile cross-section is understood to be any cross-section with any type of profile that, according to the invention, allows a strain relief element to engage behind it, in order to provide support in a direction perpendicular to the main surface of the clamping plate. The profile can form a positive shape, in particular a projection, and / or a negative shape (recess), in particular a profile groove. The profile cross-section can be formed during the manufacturing of the clamping plate, e.g., pre-formed in continuous casting or injection molding, or it can be subsequently machined, e.g., by milling.

[0037] The profile groove and / or profile projection can have any suitable shape with undercut(s), e.g. a T-shaped, V-shaped or dovetail-shaped or similar grippable profile cross-section.

[0038] The connection areas of the strain relief elements have a cross-section that is conjugated to the profile cross-section, in particular a form-fitting one, and should be movable in the main direction, i.e. transverse to the longitudinal direction of the cables, at the holding area by a small amount of play in order to further facilitate handling during assembly or subsequent adjustment of the cable routing.

[0039] Features of the aforementioned first aspect of the invention can be advantageously combined with those of the following second aspect and vice versa.

[0040] According to a preferred embodiment, it is proposed that the clamping plates each have two lateral end regions, and that two separate plate connectors are provided for holding two associated clamping plates at each of the two lateral end regions, wherein each plate connector has two opposing, in particular vertically opposing, clamping regions, each of which interacts with an end region of one of the two clamping plates. The plate connectors are designed to hold the at least two clamping plates together, in particular vertically or perpendicular to the plate direction, by gripping the clamping plates at their respective ends.

[0041] The two plate connectors can hold the clamping plates at a predetermined distance from each other and / or parallel to each other.

[0042] Two clamping plates can each be held together at their lateral end regions, located on the two short (narrow) sides, by such a separate and intermediate plate connector and connected to each other in pairs. Each of the opposing clamping regions preferably engages at least one clamping plate in a form-fitting manner.

[0043] The plate connectors simplify handling, especially in multi-layered installations with multiple layers of sheathing, as each layer is already held in place when the plate connectors are attached to the corresponding clamping plates for that layer. The plate connectors can be used for pre-fixing and, in conjunction with suitable strain relief elements, exert a clamping force on the cables within the sheathing. A separate screw connection is not required. Conversely, opening or accessing a single layer, for example, for the targeted replacement of a cable, is also facilitated, since adjacent layers do not need to be disassembled in a multi-layered structure.

[0044] Furthermore, separate plate connectors allow for a simplification of the clamping plate design. These can, for example, be cut from a longer profile to fit the desired width of the end fixing.

[0045] A plate connector can thus use its clamping areas to connect and hold two clamping plates in pairs in the longitudinal direction and perpendicular to the main surface.

[0046] The plate connectors are preferably detachably connected to the end areas of the clamping plates, in particular laterally or transversely displaceable relative to the clamping plates, so that lateral release is possible.

[0047] The plate connectors can, in particular, act like clamps to connect the two clamping plates and hold them at a predetermined distance perpendicular to the main surface, a distance determined by the plate connectors themselves. An advantage of this is that a screw connection is not strictly necessary to achieve the desired strain relief, and the required force transmission with the covering or cables can be achieved through the appropriate selection of strain relief elements and / or plate connectors.

[0048] Alternatively or additionally, the clamping areas of the plate connectors are particularly preferably designed – analogous to the connection areas of the clamping elements – to interact with a profile cross-section of the clamping plate, which preferably opens outwards on both short narrow sides. This allows the plate connectors to be easily attached and detached laterally.

[0049] Furthermore, each plate connector can include a support body, which acts as a spacer to define the vertical distance between the clamping plates. Preferably, the support body has a height that is at least twice the height of a strain relief element, e.g., a specific associated strain relief element from a kit.

[0050] Preferably, at least one vertical through-hole for a screw connection is provided in the support body, which serves for fastening, in particular at a connection point.

[0051] For both aspects, i.e., regardless of the first or second aspect, the following further training features are advantageous.

[0052] In one embodiment, each strain relief element is designed such that it projects longitudinally beyond the end faces of the clamping plates and forms a receptacle on a rear side facing away from the clamping surface, in which the respective clamping plate can be at least partially received.

[0053] Particularly in combination with the latter design and / or the second aspect, it is advantageous if each strain relief element has opposing connection areas for positive engagement in a corresponding undercut of a profile groove or formed groove on the end face of the clamping plate, in order to hold the respective strain relief element on the clamping plate in a direction perpendicular to the main surface of the respective clamping plate. The height of the connection areas can preferably be less than or equal to half the thickness of a clamping plate, so that strain relief elements can be attached to the same clamping plate on both sides without hindrance.

[0054] Preferably, the connection areas of the elements, in particular strain relief elements, do not extend beyond the opposite main side when these are attached to one main side of the clamping plate.

[0055] In principle, exactly one strain relief element could be provided on each main side of the clamping plate. However, a modular design is preferred, in which several strain relief elements, in particular elements selected from a kit of different strain relief elements appropriate to the application and, if necessary, fastening elements for support chains, are arranged in a row in the main direction on the clamping plate.

[0056] Preferably, the elements are held on a clamping plate in a way that allows them to be moved in the main direction for positioning and / or are held detachably on a clamping plate.

[0057] Particularly inexpensive production is made possible if the clamping plates are designed as essentially flat plates, especially with main surfaces that are flat in longitudinal section or with a plate thickness that remains constant in the main direction.

[0058] The clamping plates can be manufactured from a continuous profile, e.g., an extruded metal profile, especially aluminum, particularly with a profile cross-section as described in the first aspect, by cutting to the desired lengths. Alternatively, the clamping plates can also be made of reinforced plastic, e.g., by injection molding.

[0059] The strain relief elements and, if applicable, fastening elements, on the other hand, are preferably manufactured in one piece from plastic, in particular as injection-molded parts.

[0060] The plate connectors are preferably manufactured in one piece from a harder plastic than the strain relief elements, particularly as injection-molded parts, e.g., from a fiber-reinforced polymer. The plate connectors are dimensionally stable, especially in the direction perpendicular to the main surface of the clamping plates, i.e., they are neither stretchable nor compressible under intended load, in order to enable a force-fit connection between the strain relief elements and the cables in conjunction with the clamping plates. The required force for holding the cable(s) can be achieved through the appropriate selection and dimensioning of the plate connectors in combination with the appropriate selection and dimensioning of the strain relief elements. A screw connection is not required for this purpose.

[0061] The strain relief elements can have an effective side on which the clamping surface is provided. This surface can be, for example, concave or alternately concave / convex curved, or toothed or comb-like concave / convex, viewed in cross-section along the main direction or perpendicular to the longitudinal direction of the conductor(s). The clamping surface can generally be cylindrical in the geometric sense, i.e., with a constant cross-section parallel to the main direction.

[0062] In particular, differently adapted strain relief elements can be provided for different cable diameters, which can be connected modularly to a clamping plate.

[0063] Especially in multi-layered applications with several layers, it is mechanically advantageous if the clamping plates have at least two through holes for screw connections in each of their lateral end regions and one or more additional through holes for screw connections between the end regions along the main direction. Such a through hole can optionally also be designed as an elongated hole and serve to attach additional screws for fastening and / or clamping purposes.

[0064] The plate connectors can have at least two, preferably three, through holes for screw connections, which are preferably arranged in alignment with corresponding through holes for screw connections in the clamping plates.

[0065] Another advantage of both aspects, especially the second aspect, is that, if necessary, three are already needed to fasten at least two coverings in overlapping layers.

[0066] Stacked clamping plates are sufficient, with strain relief elements held on both sides of the middle clamping plate when the end fixing is assembled. These elements secure one covering on one side of the middle clamping plate and the other covering on the other side. Therefore, it is not necessary to provide two clamping plates for each layer or covering. This reduces material costs and further simplifies handling.

[0067] Furthermore, a modular construction kit is proposed, comprising at least two flat clamping plates with the features according to claim 1; at least two different types of strain relief elements, each with a different height and identical connection areas for securing to the clamping plate at least in one longitudinal direction; at least two different types of plate connectors with different heights, each plate connector having two identical opposing clamping areas that interact with the clamping plate in a form-fitting manner, namely with an end area of ​​the clamping plate.

[0068] All the features of the individual components described above, in particular the clamping plates, strain relief elements and plate connectors, can also be advantageously applied in the modular system.

[0069] The use of two plate connectors of different heights allows in particular a modular use of the end fastening with only one type of clamping plate, both for a multi-layer arrangement with two or more overlapping coverings which may be nested between only two clamping plates, and for single-layer arrangements.

[0070] Such a modular system, even with a minimal number of parts, can be better adapted to different applications, especially pipe diameters, while still simplifying handling during manufacturing and on-site maintenance. However, a system with more than two different types of strain relief elements for various pipe diameters is preferred.

[0071] Each clamping plate in the kit has at least one holding area with a profile cross-section with undercut, and each strain relief element has a connection area to hold the strain relief element on the clamping plate by engaging behind the undercut of the profile cross-section in a direction perpendicular to the main surface of the clamping plate.

[0072] In a preferred embodiment of all aspects, the strain relief elements protrude in the longitudinal direction or perpendicular to the main direction of the clamping plates beyond their end faces, in particular on both sides and / or engage at least partially around the respective end face to form an edge protection.

[0073] Further details and advantages of the invention can be found, without limiting the generality of the foregoing, in the following explanation of preferred embodiments with reference to the accompanying drawings. Features with corresponding or identical structure or function have corresponding reference numerals and are not described again if necessary.

[0074] This shows: FIG.1A-1B: a schematic representation of a generic cable management device in perspective view ( FIG.1A ) and in a cross-section perpendicular to the longitudinal direction ( FIG.1B ) according to the state of the art, e.g., from DE 20 2019 103 276 U1; FIG.2A-2C, a first embodiment of an end fastening for a cable guidance device according to FIG.1A-1B Mounted in perspective view ( FIG.2A ) and in exploded view ( FIG.2B ) and in side view ( FIG.2C ); FIG.2 Your variant of an end fastening according to FIG.2A-2C in perspective view with other strain relief elements; FIG. 3A-3B: a cross-sectional view and a side view of a second embodiment of an end fastening device; FIG. 4A-4B: a cross-sectional view and a side view of a third embodiment of an end fastening device; FIG. 5A-5C: a fourth embodiment of an end fastening device in cross-section ( FIG.5A ) and in partial perspective view (FIG.5B-5C); FIG.6A-6C: a fifth embodiment of an end fastening device in cross-section ( FIG.6A ) and in partial perspective view ( FIG.6B-6C ); FIG.7A-7B: a front view and a top view of a further embodiment of an end fastening device in modification of FIG.6A-6C ; and FIG. 8A-8C: Top views of different variants of clamping plates, in particular for an embodiment according to FIG.2A-2D .

[0075] FIG.1A-1B Figure 1 shows an embodiment of a dynamic, i.e., reciprocally movable, cable management device 1 for supply lines 8, e.g., for power and data supply in a machine. The cable management device 1 is linearly movable and forms a movable upper run 1A, a stationary lower run 1B, and a moving deflection bend 1C between them. The upper run 1A is movable in the longitudinal direction L of the cable management device 1. The deflection bend 1C has a predetermined deflection radius or bending radius about a transverse direction Q, perpendicular to the longitudinal direction L. The cable management device 1 comprises in FIG.1A Two flexible sheaths 2, elongated in the longitudinal direction L, are nested one above the other. Their spatial orientation is arbitrary; the cable guide 1 can, for example, also move vertically. Each sheath 2 is tubular in its overall shape and sufficiently flexible, due in part to its suitable design and / or material selection, to allow reversible bending of the deflection bend 1C with minimal force and to follow the movement of a movable connector or driver with minimal resistance.

[0076] Each dust-protective enclosure 2 (also called a "pod") is designed to be dust-tight and primarily serves to prevent the escape of particles, which are unavoidably generated, in particular, by abrasion of the cables and / or support chain. The design of the tube-like enclosure 2 can be, for example, as described in DE 20 2019 103 276 U1 for FIGS. 9-10, the teaching of which is included here for the sake of brevity. Other tube-like enclosures 2, e.g., from the prior art mentioned in the introduction, can also be used.

[0077] FIG.1A Figure 1 further shows two end fastening devices 10, each provided at one end of the cable management device 1. The cable management device 1 is connected and fastened by means of the end fastening devices 10 at one of two relative movable connection points, e.g. on a machine or system (not shown). FIG.1A Figure 13A-13D shows end fastening devices according to DE 20 2019 103 276 U1. Preferred embodiments of the end fastening devices according to the invention are described below. FIG.2-8 explained, instead of those from FIG.1A .

[0078] FIG.1B Figure 1 shows, purely as an example, a possible internal division of one of the two coverings 2 in a cross-section perpendicular to the longitudinal direction L. The covering 2 can, for example, be composed of a plurality of individual covering units made of plastic (not shown) or form a one-piece tube with several channels as receptacles 7. FIG. 1B The casing 2 has, for example, five channel-like recesses 7 for one or more supply lines 8 or cable bundles, as well as two support chains 9 in the outer recesses, which define the radius of the deflection bend 1C and support a free-spanning length of the extended upper run 1A. The casing 2 is made of a flexible, soft-elastic plastic, in particular a thermoplastic, e.g., PE, PU, ​​TPU, PTFE, expanded PTFE, PP, or the like, and has a consistently uniform cross-section perpendicular to the longitudinal direction L along its length. The casing 2 can be manufactured cost-effectively as a continuous strand using suitable plastic extrusion technology and cut to a suitable length, e.g., from approximately 100 mm to approximately 1500 mm. All recesses 7 within the casing 2 are spatially separated from one another and lie next to each other in the transverse direction Q. The casing 2 surrounds the lines 8 or...Support chains 9 are dustproof along their longitudinal extension, thus preventing the escape of particles that arise, for example, from abrasion or wear.

[0079] FIG.2A-2B Figure 1 shows a particularly preferred example of an end fastening device 20 according to the invention. The end fastening device 20 can be used at both ends of the cable guide 1. It has a number of identical clamping plates 210, which are arranged in FIG.2A-2D as essentially flat rectangular plates made of metal, e.g. from an aluminum extrusion profile. The clamping plates 210 form a main surface 22 on each main side for exerting a clamping force and are perpendicular with their main direction H, which corresponds to the longitudinal extent of the clamping plate 210, to the longitudinal direction L of the covering 2 (cf. FIG.1A ) arranged. All terminal plates 210 are identical in construction and have two long end faces 211 in the main direction H, perpendicular to which the conductors 8 are routed, and two short narrow sides 212.

[0080] The end fastening device 20 in FIG.2A-2D It is constructed in multiple layers, for several coverings 2 stacked on top of each other, and comprises in each layer a number of modular strain relief elements 23A, 23B, 23C, 23D, etc., of different designs. In each of the four layers shown here as examples, identical strain relief elements 23A, 23B, 23C, or 23D are positioned opposite each other in pairs between two clamping plates 210. The strain relief elements 23A, 23B, 23C, 23D each have a clamping surface 232 for force-fit retention of one or more conductors 8 (see figure). FIG.1B ) in the respective channel-like recess 7 together with the covering 2. The strain relief elements 23A, 23B, 23C, 23D are modular and designed for arrangement in a row and opposite each other between facing main surfaces 22 of the clamping plates 210.

[0081] How best to view from the side FIG.2C As can be seen, each of the identical clamping plates 210 has a holding area 213, among other things for strain relief elements 23A, 23B, 23C, 23D, etc., which holds these against displacement in the longitudinal direction L on the respective clamping plate 210. How best to FIG.2B-2C As can be seen, the clamping plates 210 each have pronounced, mutually opposing holding areas 213 on their long end faces 211, with a profile cross-section 220 at the end face, each with an undercut in cross-section or side view, wherein the undercut in FIG.2A-2D The groove 221 is formed by an approximately U-shaped groove or recess on the end faces 211, which remains constant in the main direction. The groove 221 is symmetrically arranged perpendicular to both central planes and parallel to the main surfaces 22, and has a rounded rectangular cross-section with approximately half the height of the clamping plate 210.

[0082] The various strain relief elements 23A, 23B, 23C, 23D, etc., each have two connection areas 230, here with a claw-shaped cross-section in the main direction H, which is designed for positive engagement of the undercut or groove 221 in the profile cross-section 220 of the holding area 213 of the clamping plate 210, i.e., for engagement in the end-face groove 221 as shown. FIG.2A-2D The connecting areas 230 are each designed as identical, mirror-symmetrical claws on both end faces, with each claw of a connecting area 230 occupying not quite half the free height of the end-face groove 221, so that strain relief elements 23A, 23B, 23C, 23D with corresponding connecting areas 230 can engage in the profile cross-section 220 of the holding area 213 on both sides of each clamping plate 210, cf. FIG.2C .

[0083] Between the opposing connection areas 230, a receptacle 231 is formed on the rear side of the strain relief elements 23A, 23B, 23C, 23D, which accommodates approximately half the cross-section of the respective associated clamping plate 210. Thus, one and the same clamping plate 210 can be used for two successive layers of coverings 2, as shown by the three clamping plates 210 located vertically inside the others in the diagram. FIG.2A To illustrate, the strain relief elements 23A, 23B, 23C, and 23D have different clamping surfaces and an essentially identical base area for modular use. The strain relief elements 23A, 23B, 23C, and 23D can be made of the same soft, elastic, and abrasion-resistant plastic as the covers 2 (see above).

[0084] By designing the connection areas 230 which engage positively in the undercut(s) of the clamping plates 210, the strain relief elements 23A, 23B, 23C, 23D are held securely not only in the longitudinal direction L, but also in the direction perpendicular to the main surface 22 on the respective clamping plate 210.

[0085] In FIG.2A-2D Special fastening elements 24 for support chains 9 are also shown, which secure the support chains 9 longitudinally L to the end fastening device 20. The fastening elements 24 have identical connection areas 230 and receptacles 231 (not labeled) on their rear sides. The same applies to additional spacers 25 in the upper two layers. FIG.2A-2D These spacers 25 allow a lateral offset in the transverse direction Q between the opposing strain relief elements 23A, so that in the two upper layers there are two overlapping coverings, as in FIG.1A The spacers 25, like the fasteners 24, also have claws with identical cross-sections to the connection areas 230 for holding them on the clamping plates 210. The fasteners 24 and spacers 25 are thus also securely held and fixed to the clamping plates 210 in the longitudinal direction L and perpendicular to the main surfaces 22.

[0086] How FIG.2A-2D As further shown, the profile cross-section 220 opens outwards on both sides at the short narrow sides 212, i.e., it is laterally accessible. The profile cross-section 220 remains constant along its entire length in the main direction H, i.e., between the narrow sides 212. This allows strain relief elements 23A, 23B, 23C, 23D, fastening elements 24, and spacers 25 to be optionally attached to the clamping plates in a modular fashion or as required, and positioned at any location by sliding them in along the main direction H.

[0087] FIG.2B Figure 232 illustrates, by way of example, toothed clamping surfaces 232 for the force-fit holding of the conductors 8 with the sheathing 2 on the strain relief elements 23A (in the upper layers). Here, the clamping surfaces 232 have toothed ridges or comb teeth extending longitudinally L, alternating between recesses. These teeth allow a certain degree of deformability to adapt to different diameters of the conductors 8 and simultaneously achieve a good frictional connection. Only the clamping surface 232 described briefly is shown here as an example. Planar designs are also possible, as with the strain relief elements 23B, 23C, and 23D, which differ primarily in the height or depth of their respective clamping surfaces. Furthermore, strain relief elements 23E, 23F, and 23G with concave or concave / convex clamping surfaces are also available, as in the variant shown in Figure 23A. FIG.2D shown usable. These strain relief elements 23E, 23F, 23G also have connection areas 230 that interact with the holding areas 213. The end fastening device 20' in the variant made of FIG.2D differs essentially by these differently shaped strain relief elements 23E, 23F, 23G.

[0088] How FIG.2A-2D As further shown, the end fastening device 20 has, according to another aspect, two plate connectors 240A and 240B, provided as separate components, between the lateral end regions 214 of the clamping plates 210, in order to grip and connect two clamping plates 210 in pairs at each of the two lateral end regions 214. For this purpose, each plate connector 240A, 240B has two opposing clamping regions 242, which according to FIG.2A-2D Their design corresponds to the claw-like connection areas 230 of the strain relief elements 23A... 23G, i.e., they have two opposing end-face claws. However, the plate connectors 240A, 240B each have a corresponding clamping area 242 on their upper and lower surfaces for connection with two clamping plates 210. The clamping plates 210 are connected to each other in pairs by the plate connectors 240A, 240B and held parallel to each other at a predetermined distance. For this purpose, the opposing clamping areas 242 engage in pairs, at least positively, in the end-face groove 221 of the clamping plates 210, analogous to the connection areas 230 (see Figure 23). FIG.2C ). In the example from FIG.2A-2D Two types of plate connectors 240A and 240B are shown, differing only in their height. By selecting the appropriate plate connector, the clearance between the opposing strain relief elements 23A...23G can be adjusted. Identical plate connectors 240A and 240B are inserted between two clamping plates 210 at both end regions 214. These connectors can also be inserted and removed laterally in the main direction H. The plate connectors 240A and 240B have a block-shaped support body 243, here made of solid material, in particular a dimensionally stable, inelastic plastic such as a fiber-reinforced polyamide. The support body 243 includes a vertical spacer to define the vertical distance between the clamping plates 210.The plate connectors 240A and 240B differ primarily in the height of the support body 243 and are otherwise identical in design, particularly in their vertically and horizontally mirror-symmetrical clamping areas 242. The plate connectors 240A and 240B may have a concave recess on one side to accommodate the coverings.

[0089] The plate connectors 240A and 240B each have three longitudinally distributed through holes 245 in their support bodies 243 for screw connections using screws 250. The through holes 245 are aligned with corresponding through holes 215 for the screws 250 in the clamping plates 210. The two outer screws 250 in the end regions 214 can be used for lateral securing of the fully assembled end fastening device 20; 20', as shown in FIG.2A / 2DAs can be seen, a threaded bushing can be driven into the corresponding through holes 215 on the underside of the lower clamping plate 210, or a nut can be used. The middle through holes 215, 245 can be used to fasten the end fastening device 20; 20' to the connection point, i.e., to the fixed point or driver (not shown).

[0090] As from FIG.2A-2D As can be seen further, the connection areas 230 of the strain relief elements 23A... 23G and also of the fastening elements 24 and spacers 25 serve at the same time as edge protection on the end faces 211 of the terminal plates 210, so that the conductors 8 cannot come into contact with the end faces 211 of the terminal plates 210.

[0091] FIG.3A-3B Figure 1 shows a modification with an end fastening device 30, shown here as an example for two layers of coverings, which differs only in the design of the clamping plates 310. These also have a profile cross-section 320 with an undercut, which, however, is not symmetrical to the center plane of the clamping plate 310. The clamping plate 310 corresponds in design to a clamping plate 210 halved in the vertical direction. FIG.2A-2D Therefore, two clamping plates 310, arranged in reverse order, must be provided between two successive layers. This allows for more cost-effective manufacturing of the clamping plate 310 with less material.

[0092] A further simplification of the clamping plate 410 is shown in the variant of the end fastening device 40. FIG.4A-4B As shown, a substantially flat plate without undercuts is used, which is particularly inexpensive to manufacture. The example follows FIG.4A-4B This further illustrates that the second aspect of the invention, concerning the construction method with separate plate connectors 240A, 240B, can optionally also be used independently of the first aspect, i.e., the connection between strain relief elements 23A... 23G and the clamping plates 410. FIG.4A-4B Two clamping plates must be used for each layer.

[0093] FIGS. 5A-5C show an embodiment of an end fastening device 50 with an alternative design of the profile cross-section 520 of the clamping plate 510. The profile cross-section 520 is provided here as a combination of a T-shaped projection 527 with two mirrored L-shaped grooves 521 as undercuts in the plate body of the clamping plate 510. The profile cross-section 520 is provided on only one of the two main sides of the clamping plate 510 and is mirror-symmetrical to the vertical longitudinal center plane of the clamping plate 510. FIG.5A The profile cross-section 520 of the clamping plate 510 is also uniform throughout in the main direction H and open laterally on both sides for inserting the strain relief elements 523 or plate connectors 540, etc., in the main direction H. The strain relief elements 523 or plate connectors 540 have a correspondingly shaped connection area 530 with a matching cross-sectional profile, forming a positive-locking counterpart.

[0094] FIG.6A-6C Figure 1 shows a further embodiment of an end fastening device 60 with an alternative design of the profile cross-section 620 of the clamping plate 610, here with two holding areas 613 on each clamping plate 610. The clamping plate has a holding area 613 for strain relief elements 623 on each of its two main surfaces 622. Here too, the holding areas 613 form a profile cross-section 620 perpendicular to the main direction H with a double undercut, e.g. by a T-shaped groove 621, which is fully recessed in the plate body of the clamping plate 610.

[0095] The two holding areas 613 are offset from each other in the longitudinal direction L, i.e., perpendicular to the main direction H, on the clamping plate 610, each on one of the two opposite main surfaces 622, and are arranged rotationally symmetrically about a main central axis M. The holding areas 613 are further arranged centrally in one of the two width halves of the clamping plate 610. Thus, with the design of the clamping plate 610, strain relief elements 623, plate connectors (not shown) with correspondingly shaped connection areas can also be attached to both sides of the clamping plate. Other features are shown in FIGS. 5A-5C and FIG.6A-6B correspond to the above-described FIG.2A-2D .

[0096] Another variant of an end fastening device 70 is in FIG.7A-7B shown, in which the terminal plate 710 e.g. has the cross-section of the terminal plate 610 made of FIG.6A-6C can exhibit. FIG.7A-7B This illustrates that lateral securing with screws is also possible without corresponding through holes in the clamping plates 710, by means of the laterally projecting arrangement of the plate connectors 740, which provide through holes 745 as if to FIG.2C described.

[0097] FIG.8A-8C show variants of the clamping plates 210 from FIG.2A-2D . Between the lateral end areas 214, additional through holes 235 are provided for screw connections according to different drilling patterns for an improved clamping effect if required, e.g. in the case of multi-layer end fixings. Leitungsführungsvorrichtung und modulare Endbefestigungen mit flexibler Umhüllung für Reinraumanwendungen Bezugszeichenliste

[0098] FIG.1A-1B : 1 Cable guide 1A Upper run, 1B Lower run, 1C Deflection bend 2 Sheath 7 Receptacle 8 Supply line 9 Support chain 10 End fastening device L Longitudinal direction Q Transverse direction FIG.2A-2D : 20; 20' End fastening device 24 Fastening elements 25 Spacers 210 Clamping plates 211 End face (long side) 212 Narrow side (short side) 213 Holding area 214 End area 22 Main surface 23A, 23B, 23C, 23D, 23E, 23F, 23G Strain relief elements 230 Connection area (with claws) 231 Receptacle 232 Clamping surface 240A, 240B Plate connectors 242 Clamp areas 243 Support body 215, 245 Through holes (for screws) 250 Fastening screws L Longitudinal direction H Main direction (corresponds to transverse direction Q) FIG.3A-3B; FIG.4A-4B 30; 40 End fastening device 310; 410 Clamping plates 320 Profile cross-section 240A, 240B Plate connector FIG.5A-5C; FIG.6A-6C 50; 60 End fastening device 510; 610 Clamping plate 513; 613 Holding area 520; 620 Profile cross-section 521; 621 Groove 622 Main surface 523; 623 Strain relief element 527 Projection 530; 630 Connection area 540 Plate connector H Main direction M Main center axis FIG.7A-7B 710 Clamping plate; 740 Plate connector; 745 Through holes FIG.8A-8C 210 Terminal block; 214 End sections; 215, 235 Through holes

Claims

1. An end fastening device (20; 30; 40; 50; 60) for fastening an end of a line guide device (1) which is displaceable to-and-fro and has at least one elongate, flexible envelope (2), which comprises a number of duct-like sheaths for lines, the sheaths extending in a longitudinal direction (L) from a first end to a second end, comprising - at least two clamping plates (210) with substantially flat major faces (22) for exerting a clamping force, wherein the clamping plates are each arrangeable with a principal direction (H) perpendicular to the longitudinal direction of the envelope; and - a number of strain relief elements (23A... 23G), each with a clamping surface (232) for one or more lines and for opposing arrangement between facing major faces of the clamping plates; wherein the at least two clamping plates (210) each have a retaining portion (211) for strain relief elements, which retains the strain relief elements on the clamping plate in a direction parallel to the major face against displacement in the longitudinal direction, wherein each of the at least two clamping plates (210) has two long end faces (211) parallel to the principal direction (H), wherein the retaining portion (211) forms a profile cross-section (220) with undercut (221), and in that the strain relief elements (23A... 23G) each have at least one connection portion (230) which, for form-fitting engagement behind the undercut, corresponds to the profile cross-section of the retaining portion in order also to retain the strain relief element (23A... 23G) on the respective clamping plate (210) in the direction perpendicular to the major face (22), wherein the profile cross-section is formed by an end-face groove (221) on each of the two end faces (211), and corresponding end-face connection portions (230) are provided on the strain relief elements (23A-23G), preferably wherein the connection portions (230) form an edge protection protruding at the end face for the lines.

2. The end fastening device as claimed in Claim 1, wherein the clamping plate has two long end faces and two short narrow sides (212), characterized in that the profile cross-section (220) opens outwards at at least one of the short narrow sides (212) and preferably opens outwards at both short narrow sides, and / or in that the profile cross-section (220) extends over at least a predominant proportion of the length, preferably over the entire length of the clamping plate (210).

3. The end fastening device as claimed in one of Claims 1 or 2, wherein each clamping plate has two major faces (622) facing away from one another and in each case a retaining portion (613) for strain relief elements (623) is provided on both sides which forms, perpendicular to the principal direction (H), a profile cross-section (620) with an undercut, in particular wherein the two retaining portions (613) are provided on the clamping plate (610) offset relative to one another in the longitudinal direction (L), and are preferably arranged rotationally symmetrically to a main central axis (M), and / or are preferably arranged centrally in one of two width halves of the clamping plate (610).

4. The end fastening device as claimed in one of Claims 1 to 3, characterized in that the retaining portion (213; 513) is mirror-symmetrical in configuration, in particular with two mirror-symmetrical undercuts (221; 521).

5. The end fastening device as claimed in one of Claims 1 to 4, characterized in that each retaining portion comprises a profile groove (221; 521; 621) recessed relative to the major face and / or a profile projection (527) protruding relative to the major face; preferably wherein the profile groove (521; 621) and / or the profile projection (527) forms a T-shaped, V-shaped or dovetail-shaped profile cross-section (520; 620) and the connection portions (530; 630) of the strain relief elements have a form-fittingly matching cross-section.

6. An end fastening device (20; 30; 40; 50; 60) as claimed in one of Claims 1 to 5, wherein the clamping plates in each case have two lateral end portions (214); characterized in that two separate plate connectors (240A; 240B) are provided, in order to retain the at least two clamping plates (210) at in each case one of the two lateral end portions (214), wherein each plate connector has two opposing bracket portions (242), which in each case interact at least form-fittingly with an end portion (214), and the plate connectors (240A; 240B) are configured to hold the at least two clamping plates together.

7. The end fastening device as claimed in Claim 6, characterized in that, with their bracket portions (242), the plate connectors (240A; 240B) hold two clamping plates (210) together in the longitudinal direction (L) and perpendicular to the major face (22), wherein in particular the bracket portions (242) interact with an undercut profile cross-section (220) of the clamping plate (210) and / or the bracket portions (242) are preferably configured to grip around the two end faces (211) of the clamping plate (210) in the end portion (214) thereof, preferably with two longitudinally opposing claws.

8. The end fastening device as claimed in Claim 6 or 7, characterized in that each plate connector (240A; 240B) comprises a supporting body (243), which represents a spacer for predetermining the vertical distance between the clamping plates.

9. The end fastening device as claimed in one of preceding Claims 1 to 8, in particular 6 to 8, characterized in that each strain relief element (23A... 23G) projects in the longitudinal direction beyond the end faces (211) of the clamping plates (210) and forms a sheath (231) at a rear side remote from the clamping surface (232), in which sheath the respective clamping plate (210) may be at least partly accommodated.

10. The end fastening device as claimed in one of preceding Claims 1 to 9, characterized in that a plurality of strain relief elements (23A... 23G) are arranged in a row in the principal direction (H) and / or are retained displaceably on a clamping plate (210) and / or are retained detachably on a clamping plate (210).

11. The end fastening device as claimed in one of preceding Claims 1 to 10, in particular as claimed in Claim 6, characterized in that the clamping plates (210) are embodied as flat plates with major faces (22) which are planar in front view or with a plate thickness which is uniform in the principal direction.

12. The end fastening device as claimed in one of preceding Claims 1 to 11, characterized in that the clamping plates (210) are made of metal, preferably extruded metal profiles, in particular of aluminum, or of reinforced plastics material, in particular as injection moldings.

13. The end fastening device as claimed in one of preceding Claims 1 to 12, characterized in that - the strain relief elements (23A... 23G) are made in one piece of plastics material, in particular as injection moldings, wherein the plate connectors (240A; 240B) are preferably made in one piece from a harder plastics material than the strain relief elements (23A... 23G), in particular as injection moldings; and / or the strain relief elements (23A... 23G) are made from a material which is softer then the material of the clamping plates (210) and / or of the plate connectors (240A; 240B).

14. The end fastening device as claimed in one of preceding Claims 1 to 13, characterized in that - the clamping plates (210) have in each case at least two through-holes for screw fastenings in both lateral end portions (214) and have one or more additional through-holes (215) for screw fastenings between the end portions (214) along the principal direction (H); and / or - the plate connectors (240A; 240B) have at least two, preferably three through-holes (245) for screw fastenings, which are preferably arranged for aligned arrangement with corresponding through-holes (215) for screw fastenings in the clamping plates (210).

15. The end fastening device as claimed in one of preceding Claims 1 to 14 for fastening at least two envelopes (2) in superposed layers, comprising at least three clamping plates (210) arranged one above the other, wherein on the middle clamping plate in the mounted state strain relief elements (23A... 23G) are retained on both sides.

16. A line guide device (1) for lines, such as for example cables, hoses or the like, in particular for clean room applications, comprising - at least one elongate, flexible envelope (2) which is displaceable to-and-fro, and comprises a number of duct-like sheaths (7) for lines (8), the sheaths (7) extending in a longitudinal direction (L) from a first end to a second end; - a first end fastening device (20) for the first end and a second end fastening device (20) for the second end of the envelope; - wherein the first end fastening device (20) and / or the second end fastening device (20) is an end fastening device (20) as claimed in one of preceding Claims 1 to 14.

17. The device as claimed in one of preceding Claims, characterized in that the strain relief elements (23A... 23G) project in the longitudinal direction or perpendicular to the principal direction of the clamping plates (210) beyond the clamping plates, in particular on both sides and preferably grip at least in part around the respective end face (211) of the clamping plate (210).