Connection box

Abstract

Fiber optic connection box with a housing and a set of unassembled components for the connection box, which set comprises coupling devices, namely couplings or coupling holders, as components, wherein the coupling devices from the set can be optionally fastened in the housing according to number and position.

Description

[0001] The invention relates to a fiber optic connection box.

[0002] Optical fibers (or "optical waveguides") are advanced signal carriers and are increasingly being used in practice. In particular, more and more buildings are being equipped with fiber optic connections for data transmission. These cables are arranged in cable harnesses containing a large number of individual, sheathed fiber optic cables. These sheathed individual cables are referred to below as "cables." The cable harness (in this sense, with a number of cables within it) is also sheathed, and of course, for example, in underground installations, many such cable harnesses can be combined to form even stronger cables, which in turn are often referred to as cables in everyday life, but are not meant here.

[0003] When "consumers," i.e., devices and connections for devices in offices, apartments, production areas, and the like, are connected to a fiber optic network, a building connection is typically created, possibly also a connection for a part of a building, depending on the number of connections and dimensions. Fiber optic connection boxes are commonly used here, in which individual cables from a cable harness are individually connected, whether for new connections or to modify existing connections.

[0004] Basically, plug-in connections and, in comparison, more permanent splice points are used. Receptacles, which are referred to below as couplings, are commonly used for plug-in connections. Plug-in elements to be connected can be inserted into such a coupling, are held there and thus ensure that the respective cables are connected to one another. They are also referred to as patch points. Splice points are comparatively sensitive and are usually enclosed and held and protected by a splice protector, which can be used to store them in specially provided storage spaces, i.e. places for fixing. Cables coming in from the cable harness are often connected via such a splice point to so-called pigtail cables, which only run within the junction box and have a plug-in element for a patch point at the end opposite the splice point.

[0005] Especially for building connections, connection boxes with a housing are used for a certain number of such individual connection points. This housing typically has a cover and a base and is typically designed for wall mounting on a vertical wall. Such connection boxes are typically made of plastic, in particular injection-molded parts. These are to be distinguished from distribution cabinets, in particular made of metal, often with glass doors, in which much larger numbers of connections are accommodated in stacks of modules arranged one above the other or next to each other. In the following, a connection box does not mean such a distribution cabinet, nor the housing of a module stack or a module therein, but rather a standalone connection box with a maximum number of connections of preferably up to a maximum of 288 patch points and / or for up to a maximum of 576 splice points (based on the number of individual fibers connected).Distribution cabinets are significantly larger. Of course, smaller junction boxes are also included.

[0006] The housing of such a junction box primarily serves to protect against mechanical interference, such as unauthorized access or accidental damage, as well as against dirt, especially dust, and in many cases also against moisture, e.g., against splash water, at least when installed.

[0007] Such junction boxes are offered in various versions by specialized manufacturers and are equipped with various components. These are designed for holding, guiding, and organizing excess cable lengths, as well as for organizing splices, couplings, and other elements such as splitters, filters, switches, etc. The user or customer selects a junction box that seems suitable to them. They may not use all of the installed components, and some may remain for possible future use.

[0008] On this basis, the object of the invention is to propose an advantageous connection box and an advantageous method for individualizing the connection box.

[0009] According to the invention, this object is achieved by a fiber optic connection box with a housing and a set of installation parts of unassembled installation parts for the connection box, which set comprises coupling devices, namely couplings or coupling holders, as installation parts, wherein the coupling devices from the set can be optionally fastened in the housing according to number and position.

[0010] An important idea of the invention is to equip a junction box with a set of as yet unassembled components, thus leaving the customization, or a large part of it, to the user or customer. In particular, the set of components should include at least coupling devices as components (in the above sense as receptacles for plug-in elements), and the coupling devices from the set should be able to be fastened in the housing in any number and position as required. "Coupling devices" here are holders for couplings or couplings (or both together). The couplings can be mounted in the installation box individually or using coupling holders, whereby the coupling holders can essentially consist of a frame for (possibly later) receiving a coupling and feet or other fastening elements.The couplings themselves are then attached or can be attached in or to the coupling holders and, to put it very simply, form pipe sections with a typically rectangular cross-section for accommodating plug-in connection elements. This allows the user to customize their junction box and install more or fewer coupling devices for more or fewer patch points and / or use only specific locations for coupling installation from a larger selection.

[0011] The manufacturer therefore produces identical junction boxes and identical sets of installation parts and stocks them in this form. The individual installation parts, especially coupling devices, are selected by the user from the set of installation parts and individually mounted in the housing. This preferably occurs after transport from the manufacturer to the customer, with the customer, in turn, preferably purchasing several identical junction boxes and sets of installation parts and preferably initially stocking them in this form. They can then customize them according to the specific application.

[0012] The couplings can be provided and mounted in various designs, in particular as single couplings, duplex couplings (for two typically adjacent pluggable cable connections), as multi-level couplings with at least two receptacles one above the other or with a plurality of receptacles in a row next to each other or (combined thereof) as a matrix.

[0013] By the way, the directions refer to the customization / assembly situation, where the enclosure base is typically positioned at the bottom and the cover at the top. A typical wall-mounted position may deviate from this, in which the enclosure base is attached to the vertical wall.

[0014] In a particularly preferred embodiment, the junction box with the installation parts set is designed such that the coupling devices can be selectively fastened in different line directions (relative to the connectors to be installed later and the local line direction therein). This can, in particular, mean the selection between mounting positions for preferably exactly one line direction and other mounting positions for preferably exactly a different line direction; however, the case of the selectability of the line direction during installation at a specific position is included. The selectability of the line direction opens up important additional design freedom for the individualization and interior layout of the junction box. In particular, line directions parallel to the outer edges of a junction box, which are typically at right angles to each other, are considered.

[0015] At least some of the mounting positions for coupling devices can be arranged along a housing wall, in particular the wall of the housing base, which is intended for cable feedthroughs from outside the junction box into the junction box or vice versa. The spacing between the two can be coordinated with those between the cable feedthroughs. Thus, for example, patch points located inside the housing can be advantageously combined with cable feedthroughs, the latter serving to mechanically protect the cables themselves with regard to breakage, bending radii, dust protection, or moisture protection.

[0016] A further advantageous embodiment of the invention provides that the set of built-in components is provided as a one-piece combination part in which a plurality of built-in components are connected. The built-in components can then be separated from the combination part, e.g., broken off or cut off, when they are to be assembled. However, until this point, they are kept secure and clearly visible. Furthermore, such a combination part can be manufactured particularly inexpensively, e.g., by injection molding. The combination part can, for example, have a frame within which an essentially two-dimensional arrangement of built-in components with thin transition points for separation is provided (compare the exemplary embodiment). Such a combination part can resemble a built-in component grid.

[0017] Preferably, the number of integrated combination parts is small, particularly preferably a maximum of two, and ideally exactly one (of course, per installation box). In the case of a plurality of combination parts, these can, of course, be different. Furthermore, this aspect of the invention does not preclude the provision of additional built-in parts outside the combination part, as will be explained below for some specific cases.

[0018] Advantageously, the combination part(s) can be secured within the housing, for example, by snapping it onto another part of the housing or connecting it within the housing. The combination part can preferably be rotated when secured. This means it is less likely to be obstructed during work. When secured, the combination part itself is captive and "tidy." The combination part may be secured after or during the customization of the junction box, but in this case, it is not delivered (or stocked) by the manufacturer.

[0019] In addition to the coupling devices already mentioned, the installation parts set, especially the combination part, can also contain other elements, e.g., clamping parts for fiber optic cables or additional housing parts, such as a lock plate (a plastic auxiliary element in the example) for the case of a lock being installed in the housing. In addition, auxiliary parts not intended for installation are also possible, e.g., a tool for simplifying the disassembly of connectors in couplings.

[0020] A further embodiment provides an inner mounting plate in the housing. This is a part of the junction box that provides additional space for routing or holding cables or disassembling components. This mounting plate is preferably approximately as large as the junction box itself. It preferably covers at least 60%, preferably 65%, or even 70% of the available surface area of the interior of the housing base (in the assembly position in plan view). In this respect, it can be a type of inner cover.

[0021] This mounting plate can have at least one cable tray on at least one side, preferably on both sides. Such trays are relatively large compared to many other devices due to the minimum cable curvature radii, so it may be advantageous to create space of this type in other areas of the junction box.

[0022] Advantageously, the combination part discussed above can be attached to the mounting plate. Furthermore, it can be provided that the mounting plate is detachably held in the housing, and the combination part can be attached to the housing instead of the mounting plate.

[0023] Furthermore, the mounting plate (as an inner cover) can protect certain areas, preferably splice trays, in a closed, folded position and can be opened for access. In keeping with the previously discussed customization of the junction box, the mounting plate can also have at least one removable section, allowing the user to choose between concealing a specific area (in the folded-down position of the mounting plate) and maintaining its accessibility.

[0024] There may also be other accessories that, as previously mentioned, are preferably not integrated into the preferred combination part. In particular, this applies to a needle-like manipulation aid, similar to a knitting needle or a Mikado stick, which can be a practical and efficient aid when handling cables. Such a needle can be molded onto a part of the junction box and detachable from it if necessary. Of course, the junction box can also provide attachment options for the (detachable) needle.

[0025] The flexibility of possible uses and the individualization of the connection box can be further increased by an additional excess length storage area. For this purpose, a special excess length storage area can be provided below a connection area. The connection area refers to an area for cable connections with splice points and / or patch points, i.e., for example, an area with possible mounting positions for the coupling devices mentioned above. In an area below, which becomes accessible or more easily accessible by moving an internal structural part of the connection box, a special excess length storage area can be provided for relatively thick fiber optic cables with a thickness of at least 0.5 mm, preferably even at least 0.8 mm, 1.0 mm, 1.2 mm, or 1.5 mm. Preferably, at least 10, preferably 20, 30, 40, 50, 60, 70, or even 80, of 0.9 mm cables are possible. This means that there is relatively plenty of space available.

[0026] In a preferred embodiment (and in the exemplary embodiment), the connection area above can contain at least one hinged splice cassette, which is held in a hinged manner in a receiving part, preferably a whole stack of stacked splice cassettes. These can then be folded up for the aforementioned access to the area below. The splice cassettes each contain at least one splice point tray and preferably a respective excess length tray for the typically thin individual fibers that hang at the splice points (and which can be, for example, 0.2 to 0.25 mm thick).

[0027] This allows a choice between the aforementioned excess length storage for particularly thick cables beneath the connection area, the excess length storage on the aforementioned mounting plate, and also the excess length storage in the splice cassettes. Additionally, the (at least one) splice cassette(s) can be detachably attached and thus also omitted, thus leaving a space above the aforementioned excess length storage for particularly thick cables available for particularly excessive cable lengths. Furthermore, the base section and, preferably as a one-piece component thereof, a receiving area for detachably holding splice cassettes can be provided as separate parts in a connection box divided into an actual housing, and a space within the housing base and outside the base section can also be used as excess length storage.

[0028] The available height in the base section, i.e. in the area below the connection area, can also be used for larger components such as filters, splitters, and the like, for which splice cassettes may not offer enough height. Furthermore, unused connector elements with attached pigtail cables can be stored here. The excess length storage in the base section can, to name just one example, be used for multiple cables on a splitter. The additional excess length storage outside the base section can, for example, be used for an unused remainder of an entire stranded cable (with multiple bundles, each with multiple fibers). If, for example, only some of the bundles are suitable for connections to the connection box, the unused remainder can be stored as excess length in this way in order to have sufficient cable length available for the bundles in use.

[0029] This excess length storage unit is therefore particularly suitable for particularly thick (strand) cables with a thickness of at least 0.8 mm, preferably at least 1 mm, 1.2 mm, 1.4 mm, or even at least 1.6 mm. It provides space for preferably at least 10, particularly preferably at least 20, 30, 40, or even at least 50 such cables.

[0030] A preferred design for the junction box is mirror-symmetrical with respect to a central plane. This, of course, refers to the state before it has been customized. In this case, depending on the position of an incoming cable harness, the desired routing of cables exiting the junction box, and the available storage options for the junction box itself, it is possible to choose whether the cable harness enters the junction box on the left or right (and the outgoing cables typically exit on the other side). Due to the symmetry of the mounting options within the junction box, this decision can then be implemented during customization to ensure an optimal layout of the junction box's interior.

[0031] In the following, the invention is explained using an embodiment, the details of which basically relate to all claim categories.

[0032] In detail: Fig. 1 a perspective view of a connection box according to the invention with an open housing and a base part inserted into a lower part of the housing; Fig. 2 an analogous perspective view, with a mounting plate mounted on the base part; Fig. 3 an analogous view, wherein a combination part with a set of built-in parts is mounted on the mounting plate; Fig. 4 a side view of the connection box Fig. 1, wherein splice cassettes are accommodated in a receiving part projecting upwards from the base part to the left and in Fig. 4 are shown folded up (in this case Fig. 4 front side panel parts of the lower housing part omitted for illustrative reasons); Fig. 5 the cover of the connection box, which is in the Fig. 1-4 is shown folded up, individually and from the outside or above in perspective view; Fig. 6 the lower part of the connection box individually, in particular without the inserted base part; Fig. 7a the bottom part of the connection box individually in Fig. 1 corresponding perspective representation and for more three-dimensional visibility with shades of grey; Fig. 7b one to Fig. 7a identical representation, but without shades of grey; Fig. 8 the mounting plate Fig. 2 and Fig. 3 individually and in a different perspective and without combination part; Fig. 9a the combination part from Fig. 3 individually and in a similar perspective, shaded grey for a more three-dimensional representation; Fig. 9b the representation of the Fig. 9a, but without grey shading; Fig. 10 the situation Fig. 3 in a different perspective; Fig. 11 one to Fig. 10 analog representation, but omitting the mounting plate from Fig. 10 and with alternative fastening of the combination part to the receiving part for the splice cassettes; Fig. 12 the mounting plate Fig. 8 in plan view, with a part broken away; Fig. 13 a connection box with compared to the Fig. 1-4 and 10 and 11 different internal structure in Fig. 1 corresponding perspective representation; Fig. 14 perspective view of a single part of the interior structure Fig. 13; Fig. 15 the bottom part from the Fig. 7 with individual parts mounted therein and an example cable routing; Fig. 16 a similar representation as Fig. 15, but with different mounted components and a different exemplary cable routing; Fig. 17 a plan view of the base part of the connection box with an example of cable routing; Fig. 18 a sub-view of Fig. 17; Fig. 19 a further plan view of the base part with another exemplary cable routing; Fig. 20 a perspective view of the lower part and the base part of the connection box inserted therein with the mounting plate folded up to illustrate another exemplary cable routing; and Fig. 21 a view analogous to Fig. 20, but with the mounting plate folded down and another example cable routing.

[0033] The connection box according to the invention for fiber optic connections in the Fig. 1-4 has a housing that consists of a lower part 1 according to Fig. 6 and a cover 2 according to Fig. 5. These can be found at the Fig. 5 and Fig. 6 rear right side are brought into a locking joint so that the cover 2 can be opened and closed. The Fig. 1-4 and others show the opened state of the lid 2.

[0034] To simplify the illustration, a horizontal alignment of the lower part 1 is assumed here, but this is not mandatory in practical application. In particular, this can be Fig. 1-4 and 6 can also be mounted on a wall with the side facing downwards, so that the cover 2 can and must then be opened from a closed vertical position beyond a horizontal position in order to gain access to the interior of the junction box.

[0035] When closed, the lid 2 and the base 1 can also be locked together using a lock; this is optional in this embodiment. The lock can be used in the Fig. 5 front left visible circular field in the cover 2 in an opening (to be created by breaking out a part provided for this purpose), but is not shown. It closes with a latch against a Fig. 9 still explained plastic striking plate 22. In addition, the projections 3 of the cover 2, when closed, coincide with the projections 4 of the lower part 1 and screw connections or seals can be made here.

[0036] When closed, the junction box primarily protects against mechanical damage or unauthorized access to the interior. When closed, it also provides a certain degree of protection against moisture and humidity. In particular, the lower part 1 is made of Fig. 6 is closed at the bottom; the grid shown is therefore a reinforcement. The grid has (initially closed) points at the intersection points for screwing, e.g., onto a wall. At the contacting edges of the base 1 and cover 2, seals can be inserted into the grooves on the cover side in this example, and projections on the base engage in these grooves. In addition, the approximately U-shaped openings in the wall of the base 1 facing downwards to the left offer the possibility of attaching cable seals. The Fig. 6 clearly visible mounting arms at the front left and a non-visible but similar central mounting arm at the rear right also allow the lower part 1 to be mounted on the wall side without any internal openings in the lower part 1, thus providing better moisture protection. The connection box can be used in different ways within its interior and can offer various connection options (splice and patch connections) as well as cable lengths of different configurations. Fig. 1-12 a very flexible interior design is shown and the Fig. 13 and Fig. 14 illustrate an alternative that is aimed at a maximum number of splice connections.

[0037] In Fig. 1 you can already see a base part 5 inserted into the lower part 1, which in turn is inserted into the Fig. 7 is shown once with shades of grey and once without. This base part 5 essentially fills the lower part and has a diagonally rising extension on the side facing the joint connection between the lower part 1 and the lid 2, namely a receiving part 6 with diagonally superimposed joint receptacles 7 for Fig. 4 visible splice cassettes 8, in this case a maximum of seven. Fig. 7 you can see guides to the right and left of it for individual cables, especially pigtail cables, running into or out of the splice cassettes close to the axis.

[0038] The Fig. 4 and Fig. 7 illustrate that the splice cassettes 8 are horizontal when folded down and a rear part of the structures of the horizontal area of the base part 5 in the Fig. 7, while in the raised position according to Fig. 4 allow access to them. Furthermore, access to individual splice cassettes 8 is also achieved by selectively folding them up.

[0039] Above the recording part 6 you can see Fig. 7 a needle 8 formed on the receiving part 6 and positioned horizontally. This needle 8 can be broken off and used with its two ends for manipulating cables. When not needed, it can be stored in the Fig. 7 left end visible hole and another one approximately in the middle in the Fig. 7 with 9 vertical pins on the edge, then lies parallel to this edge of the base part 5 and does not interfere with other work. In the form shown, this is a part that is injection-molded together with the remaining base part 5 and the receiving part 6. This applies analogously to the Fig. 8 pins marked 49 on part 10, which is discussed below.

[0040] Fig. 2 additionally shows a cover-like part arranged on the base part 5, namely the so-called mounting plate 10, which can be individually Fig. 8 and in Fig. 12 can be seen, where in Fig. 12, a front left part has been broken off at predetermined breaking points. This mounting plate 10 is engaged in a hinged mount and, similar to the cover 2, can be folded around a rear horizontal axis. When folded up, it allows, as in Fig. 1 access to the base part 5, any splice cassettes 8 thereon, etc., cf. Fig. 20. In addition, it can be used when the connection box is folded up and in a vertical position (unlike in the Fig. 1-4) secure the raised cover 2 so that a technician does not have to hold it and has both hands free. For this purpose, the projection 33 ( Fig. 1) is provided in the cover, under which the mounting plate can engage. Conversely, cover 2 also secures the mounting plate 10.

[0041] In this embodiment, the mounting plate 10 contains on the top and in Fig. 8 visible and additionally underneath and in Fig. 20 visible storage for excess cable lengths. The upper one is in Fig. 8 is labeled 11 and the lower one in Fig. 20 with 12. You can also see in Fig. 8 a document holder clip for securing paper documents during assembly work to document the connections made. To the right and left of this, you can see number fields that assign numbers to Fig. 16 patch points or coupling positions to be explained in more detail.

[0042] Furthermore, the four hooks 14 in Fig. 8, in addition to holding down discarded excess cable lengths, also holds a combination part 15, which is inserted into the Fig. 9. This combination part 15 forms an integrated set of components, a kind of parts grid from which individual components can be removed. It can be produced as a single component and can also be handled and stored as a single component.

[0043] Fig. Figure 3 shows the combination part 15 in the excess length storage 11 on top of the mounting plate 10. Due to its limited thickness, it can remain in place or be stored there again, even if there are a limited number of cables underneath. Alternatively, it can be clipped into the hinged holder for the mounting plate 10 when the latter is not installed. This is shown in Fig. 11 compared to Fig. 10 (with mounting plate 10), whereby the combination part 15 in Fig. 11 can be folded up in the same way as the Fig. 4 splice cassettes shown in this state 8.

[0044] On a side facing away from the joint axis, namely in Fig. 8, left front, the mounting plate has two projecting arms 16 with screw holes at the ends. When folded down, it can be screwed in place using these arms, with the screws being screwed into openings 17 in the Fig. 7 and Fig. 11 are indicated, see also Fig. 10. Distal from the corresponding holes of the arms 16, these arms also have tabs with which a seal can be attached alternatively or additionally.

[0045] This has to do with the function of the mounting plate 10 as a cover. For example, Fig. As shown in Figure 10, the mounting plate 10, when folded down, covers essential parts of the base part 5, in particular the stack of splice cassettes 8 and essential parts of the pigtail cables leading from or entering there. Especially in conjunction with selectable options for patch points or plug-in couplings, the corners of the mounting plate 10 remote from the joint axis can be broken out, see Figure 10. Fig. 12, allowing patch cables to be manipulated there, which can be plugged and unplugged into a coupling holder 19 (to be explained later). Pigtail cables extending from the coupling holder 19 can then be routed under the remaining corner. Of course, both corners can also be broken out, for example, to accommodate multiple coupling holders 18 of a different type.

[0046] The corresponding coupling holders 18, 19 are parts of the combination part 15 in the Fig. 9, wherein there is a first type of coupling holder 18, which in this embodiment is designed for a local line direction of the corresponding coupled lines along the longitudinal direction of the connection box, cf. Fig. 15. There are seven corresponding positions for this, with Fig. 15, the third from the right is selected. Such a coupling holder 18 contains two superimposed openings, each for a duplex coupling, so that a maximum of four individual fibers can be patched per coupling holder 18. When the mounting plate 10 is folded down, the coupling holders 18 are held in place by the top of the plate in all seven positions and are accessible for patch cables from the front. No corner of the mounting plate 10 needs to be broken out for this purpose. The combination part 15 has six such coupling holders 18.

[0047] Furthermore, there is a second type, namely a matrix coupling holder 19, to which Fig. 16. This matrix 19 can be inserted into a receiving area 21 (cf. Fig. 7 and Fig. 11) and is in this state (with the mounting plate 10 folded up) from the Fig. 16 can be folded approximately 90° to the left to create space if necessary. The matrix 19 can accommodate a maximum of 13 duplex couplings, whereby, as already mentioned, for the accessibility of the patch cables (in Fig. 16 not shown, but pointing to the front left there) one of the two corners of the mounting plate 10, in the case of the Fig. 16, the left one, should be broken out. On the other hand, the remaining corner, together with the rest of the mounting plate 10, covers the pigtail cables, see. Fig. 16 with the Fig. 10 and Fig. 12.

[0048] Generally, the mounting plate 10, when folded down, serves to fix the coupling holders 18 and 19; in both cases, the upper areas of the coupling holders 18 and 19 engage in corresponding receptacles in the mounting plate 10 and are thereby also stabilized on the upper side.

[0049] In addition, there is an additional coupling holder 24, which allows a 13th duplex coupling analogous to the matrix 19. This “13th coupling holder” 24 can be attached to a Fig. 7 must be attached at the point marked 27, cf. Fig. 15. A 13th coupling may be of interest, for example, for a separate building connection and is therefore possible with both the longitudinal and transverse coupling options.

[0050] The duplex LC type couplings mentioned here can also be replaced by single SC or E2000 type couplings, which halves the maximum number of connectable cables.

[0051] Furthermore, the Fig. 9 a tool 21 for removing plug connections, which is known per se but is particularly practical here. 22 is a (in a Fig. 7 with 22 designated area) is a locking insertable “lock plate” which, when inserted, forms a counter bearing for the bolt of the lid lock already mentioned, with the slightly widened flank to the left of its Fig. 9 clearly visible large opening.

[0052] The tool 21 can be attached to a Fig. 7 hooks marked 26, using the screws provided in the Fig. 9. After turning it 90°, the tool 21 hangs on the hook 26. Furthermore, the hook 50 to the right of the hook 26, when the connection box is mounted vertically, serves to "hang away" any loose cables that are not currently in use. Alternative mounting options for the tool are described in Fig. 8 marked 30.

[0053] There is also a holder 25 for splice protection devices.

[0054] Finally, the combination part 15 contains clamping elements 28 for mounting on the Fig. 7 points marked 29, with which pigtail cables can be clamped in this so-called set-off area using foam rubber elements (not shown) and the clamping elements 28.

[0055] Under the mounting plate 10, closer to the axis of rotation than the discussed break-out corners of the mounting plate 10, there is an area which is efficiently protected by the connection plate 10 and which has so far been used essentially in connection with the accommodation of the stack of splice cassettes 8 (cf. Fig. 4). The stack of splice cassettes 8, which are held in an articulated manner on the receiving part, forms a connection area, wherein, in the known manner, in addition to splice point storage, an excess length storage is also provided in the splice cassettes for the respective cables involved.

[0056] Below the connection area, in the base part 5, there is a plan view (approximately Fig. 15) is intended to be a structure resembling a splice cassette, but with a considerably greater height and is referred to here as a "mixer". In particular, there is a Fig. 15 and Fig. 16 Overlength storage 35a, b, c used for the cables shown ( Fig. 17) and a storage area 36 for splices, in which in the Fig. 15 and Fig. 16 also houses an exemplary splice protection device. Due to the greater available height, the splice point storage 36 can be designed as a double-decker, unlike those in the splice cassettes 8. This is the background for part 25 in the part grid / combination part 15 from the Fig. 9. This part 25 forms the upper level, while in the Fig. 7 the lower level can be seen.

[0057] The increased height allows for the storage of thicker cables, especially in larger numbers of windings or cables, particularly in the outer areas 35b (bottom) and 35c (top) for windings that are not directly connected to a splice. For example, 100 cable windings of 0.9 mm thickness can be accommodated there.

[0058] Furthermore, in the innermost areas 37 ( Fig. 17) can also be used to store excess lengths of unused pigtail cables. Since these are not used, winding with a relatively small curvature radius is also possible. The shelves 37 are designed even deeper for this purpose, which can be seen, for example, in the Fig. 7. Finally, on the side opposite the splice point storage 36 and thus close to the joint axis, there is a receiving area 38 for relatively thick components such as filters or splitters, which would not fit in the splice cassettes themselves.

[0059] In terms of the floor space outside and in terms of the height below (apart from the bottom of the shelves 37) of the mixer, there is another excess length shelf, which is arranged using the thick cable 39 in Fig. 17 can be seen and will be explained later. Here, the cable 39 is essentially wrapped around the previously described structure.

[0060] The Fig. 10 The part of the base part 5 that is not covered upwards to the right of the mounting plate will not be explained in detail in this example. In summary, this is (in the sense of Fig. 10 from right to left) to ensure the sealed insertion and removal of different cables through the Fig. 1-3 and 6 clearly visible front U-openings in the lower part 1 and corresponding elastomer seals therein (one of which is in Fig. 10 indicated at the very front, in Fig. 17 and Fig. 18 more). In a level directly behind / to the left of this, sheaths or tubes surrounding the cables can be clamped with cable ties and components intended for their fixation. Furthermore, further to the left are various screw bosses for attaching aramid fibers, which serve in a conventional manner to provide strain relief for bundled cables. Regarding these elements, reference is made to the applicant's other parallel applications.

[0061] Before the possibilities of the design presented so far are explained in more detail, the Fig. 13 and Fig. 14 briefly illustrates the flexibility of the junction box in a different way. Fig. 13 are ( Fig. 4 splice cassettes 8 (corresponding in themselves), but in significantly larger numbers, on brackets 31 attached to the lower part 1 with the reference number 7 in the Fig. 7 approximately corresponding hinged mounts 32. The mounts 31 are each screwed onto the lower part 1. They show in Fig. 14 conventional cable clamps are located to the right and left of the articulated receptacles. In this form, the connection box can be used to accommodate a maximum number of splice connections instead of the base section 5 and the other components mounted thereon.

[0062] Typically, the two outermost of the U-shaped openings in the front of the lower part 1 mentioned above are used to insert a bundled cable. This can be done with or without prior installation of an empty conduit and only later blowing in. The cable or the empty conduit is secured by clamps. A cable routed through an empty conduit can, for example, be sealed to the empty conduit using a known EZA (single-pull seal), which is particularly useful on some of the Fig. 15 recognizable places for the possible mounting of a coupling holder 18 (instead of its mounting). Furthermore, strain relief can be achieved by clamping strain relief elements in the cable or bundled cable to screw bosses. In the inner places, this usually concerns thinner cables and aramid yarn within them, which are attached to one of the screw bosses 51 ( Fig. 15-17). The outer positions usually involve thicker cables with rigid central elements and screw terminals in the Fig. 15-17 with 52 designated areas.

[0063] For details of the sealing (with elastomer sealing elements partially visible in the figures) and clamping, reference is made to two European patent applications filed in parallel with this application by the same applicant, which relate to this part in detail.

[0064] Then an excess length of the bundled cable can be stored according to Fig. 17, which shows a top view of the base part 5. There you can see a bundled cable 39 drawn as a thick black line, which enters at the bottom left (details of the seal, clamp and EZA are omitted) and relatively far out and in particular under the receiving part 6 (cf. the Fig. 4 and Fig. 7). This can be done multiple times, whereby the "bundle cable" 39 here is typically already a bundle of individual cables and has lost its common sheath shortly "downstream" of the EZA. If necessary, a part of the cables from the bundle that is not to be interrupted and is to be fed to the connections in the connection box could be led out of the connection socket on the right side, almost in a mirror image of the inlet (bottom left), which is Fig. 17 is not shown. In this example, 70 windings with a thickness of 1.2 mm can be stored in the area marked 37.

[0065] For example, with regard to the Fig. 17 below transverse part of the cable 39, the previously mentioned foldability of the matrix 19 from Fig. 16 can be advantageous. This matrix 19 can be folded up to allow windings to be added or removed in this area.

[0066] Fig. 18 clarifies the explanations to Fig. 17, in which it shows the course of the cable 39 from below, i.e. from the perspective of the lower part 1.

[0067] Fig. Figure 17 further shows an insertion area, designated 40, in which at least parts of the treated bundled cable 39 can be inserted into the so-called mixer with its excess length storage 35, the splice point storage 36, etc., and can be slightly raised in height. A mirror-image and analogous structure is shown on the right side, in Fig. 17 (not numbered), for "settling," i.e., leading out of this area to the level below. Of course, cables can also be routed directly from an EZA through this insertion area 40. Typically, any protective sheaths remaining in (or immediately downstream of) the insertion area 40 at a foam rubber clamp are removed, exposing the individual fibers. These individual fibers are then connected in the so-called mixer or, typically after passing around it, in one of the splice cassettes 8 above.

[0068] Fig. 19 shows this alternative cable routing, where the cable here has the reference number 41. In the right area of the Fig. 19 shows cables leading out of the mixer, with the rightmost one bearing the number 42, indicating that a cable at the bottom right can be led out of the connection box (analogous to the entry at the bottom left). Another cable 43 shows a possible lead to patch points / connectors in the Fig. 16 shown matrix 19, i.e. with transverse to the longitudinal direction (and in Fig. 19 horizontal) local line direction at the coupling. 44 indicates exemplary courses in the direction of coupling positions as in Fig. 15 with corresponding coupling holders 18.

[0069] Top in Fig. 19 you can see cable runs leading to or coming from the splice cassettes 8 on the left with 45 and on the right with 46.

[0070] Finally, 47 designates a cable route to the already mentioned receiving area 38 for splitters or filters.

[0071] Fig. 20 and Fig. 21 give examples of cable routing to the two excess length shelves 11 and 12 of the mounting plate 10. In Fig. 20 this is shown for the underside overlength storage 12 and in Fig. 21 for the top-mounted excess length storage 11. It can be seen that in both cases, considerable volume is available for thick or numerous cables. These can be secured with cable ties or other means if necessary. Fig. 20 is a continuous cable entering from the front of the base 1 and exiting again to the front on the right, e.g., a continuous part of a cable harness, the other part of which is connected in the connection box. Fig. 21 is a to the left of a coupling position in the matrix 19 ( Fig. 16) outgoing patch cable, which also then runs further to the right to the front of the lower part 1.

[0072] Cables can also be routed from the rear onto the mounting plate 10 and its upper excess length holder 11, i.e. in a mirror image to the Fig. 21 cable running out of the excess length storage 11 on the right.

[0073] The Fig. The possibility of accommodating excess cable lengths in the excess length storage 12 shown in Figure 20 depends, in terms of its volume, on whether and how many splice cassettes 8 are used, because these also require installation space in this area under the mounting plate 10. The reverse also applies to a similarly possible excess length storage on the mixer, which is not shown.

[0074] Cable ties can be attached at various locations there, so that the space is available for storing excess lengths independently of the mounting plate 10. However, the stored excess lengths would not simply be folded up to facilitate access to the structures below.

Claims

[1] Fiber optic connection box with a housing and a set of unassembled components for the connection box, which set includes coupling devices, namely couplings or coupling holders, as components, wherein the coupling devices from the set can be optionally fastened in the housing according to number and position. [2] Connection box according to claim 1, in which the coupling devices can be fastened in different line directions of the respective patch points. [3] Connection box according to one of the preceding claims, in which the set of built-in parts is realized as at least one one-piece, preferably injection-molded combination part with a plurality of connected built-in parts, which built-in parts can be separated from the combination part. [4] Connection box according to claim 3, wherein the combination part can be fastened in the housing. [5] Connection box according to one of the preceding claims, in which the set of installation parts, preferably the combination part, further comprises a tool for disassembling connectors, a clamping part for fiber optic cables and / or a locking plate for the housing. [6] Connection box according to claim 3 or 4, optionally in combination with claim 5, which has an inner mounting plate which is held therein so as to be foldable relative to the housing and to which mounting plate the combination part can be fastened. [7] Connection box according to claims 4 and 6, wherein the mounting plate is detachably held in the housing and the combination part can be fastened in the housing instead of the mounting plate. [8] Connection box according to one of the preceding claims with a needle as a manipulation aid, which needle is formed on a part of the connection box and can be separated therefrom for use. [9] Connection box according to one of the preceding claims, comprising a connection area for splice point storage and / or patch points and a base part below the connection area, in which base part an excess length storage for up to at least six fiber optic cables with a thickness of at least 0.5 mm each is provided. [10] Connection box according to claim 9 with a receiving device for filters and / or splitters in the base part and / or with recesses for unused plug connection elements in the base part. [11] Connection box according to claim 9 or 10 with an excess length storage for stranded cables with a thickness of at least 0.8 mm outside the base part and between the base part and the housing. [12] Connection box according to one of the preceding claims, which is mirror-symmetrical with respect to a central plane with regard to the mounting possibilities for the components from the set and an entry position of a fiber optic cable harness. [13] Use of a plurality of connection boxes according to one of claims 1-12, in which the connection boxes and the sets of built-in parts are each identical and the connection boxes are individually customized from one another by means of built-in parts from the sets of built-in parts.

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