AU2017100122B4 - Cross connection unit - Google Patents

Abstract

Disclosed herein is a cross connection unit (e.g. telecommunications pillar). The unit may be used to provide an accessible distribution/break-down point in a copper cable network between the equipment point of interconnect and a customer. The unit may comprise a base for supporting the unit on the ground and an elongate column extending from the base.

Description

ι 2017100122 01 Feb 2017

CROSS CONNECTION UNIT TECHNICAL FIELD

[001] Disclosed herein is a cross connection unit for use in a telecommunications network. Also disclosed are components of the cross connection unit and various methods for retrofitting existing cross connection units.

BACKGROUND ART

[002] Cross connection units, or telecommunication pillars, were introduced into the Australian telecommunications network in the 1950's. The function of a telecommunications pillar is to provide a sealed enclosure where cross connection of copper services can be managed close to the client (e.g. a domestic or commercial property). Pillars are used to provide an accessible distribution/break-down point in the copper cable network between the equipment point of interconnect and the customer. They are fed by copper cables from the exchange that in turn feed smaller size outgoing customer distribution cables. Connected copper cable pairs are used to provide a telecommunication service to customers.

[003] Existing pillars generally come in two sizes, 1800 pair and 900 pair. An 1800 pair pillar typically feeds a distribution area of up to 600 customers. The pillar provides an access and test point in the network, if ever the line or equipment develops a fault. Typically, a ratio of about 1:2 is provided between main exchange pairs and customer distribution pairs of copper cables.

[004] Pillars are usually cylindrical structures and include a base for connecting the pillar to the ground. The base is open at either end to allow for main subterranean copper cables to be fed into the pillar and then into the body of the unit. Pillars typically also include a post that extends from the base to which cables of the network are connected, a cover removably mounted to the base to protect the internally located cables from the weather, and a locking cap for locking the cover to the base. The locking cap prevents unauthorised access to the internally located cables.

[005] In order to access the internally located cables of a pillar, the locking cap is unlocked by a key and then rotated to disconnect the cap from the centrally located post. Following removal of the cap, a nut is then rotated to disconnect from the post to free the cover such that 2 2017100122 01 Feb 2017 the cover can be lifted up and over the post to expose the internal cables. In order to reassemble the pillar, a tradesperson must then locate the cover back on the base and central post, re-attach the nut, thread the cap onto the post and lock the cap.

[006] The process to access the internal cables for maintenance is cumbersome, time consuming and requires special tools. As a result, tradesman may leave the pillar open and exposed to the weather while performing maintenance work in the vicinity of the pillar (e.g. if accessing a nearby telecommunications pit following removal of the pillar cover). Also, tradesman may not reattach the locking cap following maintenance of the pillar, leaving the pillar unsecure. Further, lifting the cover, which typically weighs around 10kg and is 1 metre in length, can cause discomfort to the tradesperson and result in the cover being re-fitted incorrectly following maintenance.

[007] The above references to the background art do not constitute an admission that the art forms part of the common general knowledge of a person of ordinary skill in the art. The above references are also not intended to limit the application of the cross connection unit as disclosed herein.

SUMMARY

[008] Disclosed herein is a cross connection unit for a telecommunications network. The unit may comprise: a base for supporting the unit on a surface, the base defining a cavity that is open at a first end of the base to allow cables of the telecommunications network to be directed into the cavity, the base comprising a plurality of apertures through a surface of the base that is disposed at a second end of the base to allow the cables to be directed out of the cavity, the apertures comprising a plurality of first apertures disposed radially about the surface and a second aperture centrally located with respect to the surface and surrounded by the first apertures; and an elongate column supported by and extending from the base, the column comprising a distal end that is spaced from the base and a proximal end for mounting the column to the base, the proximal end comprising spaced legs adapted to be mounted on either side of the second aperture such that the second aperture is open to allow cables to be directed therethrough. 2017100122 01 Feb 2017 3 [009] The elongate column may allow for the telecommunications cables to be directed through both the first and second apertures of the base.

[0010] In some forms, the column may further comprise a mounting flange disposed at the proximal end of the column, the flange comprising at least one aperture configured to receive at least one fastener for mounting the column to the second end of the base.

[0011] In some forms, each leg of the column includes a pair of arcuate mounting flanges, each flange being configured to curve around a portion of the second aperture. This arrangement may allow for the legs to be mounted to the base and not interfere with the second aperture.

[0012] In some forms, the base may further comprise at least one mounting aperture configured to align with the mounting aperture of the column flange in use and receive the at least one fastener for mounting the column to the second end of the base.

[0013] In some forms, the column may comprise an elongate cylindrical portion that extends along a longitudinal axis of the unit, the cylindrical portion being disposed towards the distal end of the column, and wherein the pair of legs are connected to the cylindrical portion such that each leg extends from the cylindrical portion.

[0014] In some forms, each leg includes first and second elongate leg portions, the first leg portion being connected to the cylindrical portion and extending from the cylindrical portion along a first axis, the first axis forming an acute angle with the longitudinal axis of the unit, and the second leg portion extends from the first portion along a second axis, the second axis being parallel to and offset from the longitudinal axis of the unit.

[0015] In some forms, the unit may further comprise a plug configured to be received in the second aperture. This may allow for the second aperture to be covered if expanded system capacity is not required.

[0016] In some forms, the column may further comprise a latching arm that extends from the distal end of the column, the latching arm being axially aligned with the distal end of the column. 4 2017100122 01 Feb 2017 [0017] In some forms, the latching arm may comprise an annular groove formed within a side wall of the latching arm, the annular groove arranged to receive and engage a latching arrangement.

[0018] In some forms, the latching arm may comprise an arcuate cam surface configured to pivotally displace the latching arrangement when the cam surface of the latching arm is received within the latching arrangement.

[0019] Also disclosed herein is a column for a telecommunications network cross connection unit, the unit comprising a base for supporting the unit on a surface, the base defining a cavity that is open at a first end of the base to allow cables of the telecommunications network to be directed into the cavity, the base comprising a plurality of apertures through a surface of the base that is disposed at a second end of the base to allow the cables to be directed out of the cavity, the apertures comprising a plurality of first apertures disposed radially about the surface and a second aperture centrally located with respect to the surface and surrounded by the first apertures. In some forms, the column may be elongate and configured to be mounted to the base such that it extends from the base. In some forms, the column may comprise a distal end that is spaced from the base and a proximal end for mounting the column to the base, the proximal end comprising spaced legs adapted to be mounted on either side of the second aperture such that the second aperture is open to allow cables to be directed therethrough.

[0020] Also disclosed herein is a method of retrofitting a cross connection unit to increase the capacity of the unit, the cross connection unit comprising a base for supporting the unit on a surface, the base defining a cavity that is open at a first end of the base to allow cables of the telecommunications network to be directed into the cavity, the base comprising a plurality of apertures through a surface of the base that is disposed at a second end of the base to allow the cables to be directed out of the cavity, the apertures comprising a plurality of first apertures disposed radially about the surface. The method may comprise: removing a post from the base by disengaging a plurality of fasteners connected to a collar of the post and the base second end; forming a second aperture by disengaging the post from the base; and mounting a column to the base second end, the column comprising a proximal end for mounting the column to the base, the proximal end comprising spaced legs adapted to 2017100122 01 Feb 2017 5 be mounted on either side of the second aperture such that the second aperture is open to allow cables to be directed therethrough.

[0021] Also disclosed herein is a cross connection unit for a telecommunications network. In at least one embodiment, the unit may comprise: a base for supporting the unit on a surface, the base comprising a channel disposed therethrough that is arranged to direct cables of the telecommunications network into the unit; an elongate column supported by and extending from the base, the column comprising a distal end that is spaced from the base; and a removeable cover supported by the base, the cover comprising an aperture at a first end that is configured to receive the distal end of the column to locate the cover with respect to the base, wherein a cavity is defined by the base and the cover that provides an enclosed space for the cross connection of the cables of the telecommunications network when the cover is located with respect to the base; and a latch for securing the cover to the base, the latch comprising a displaceable latching element and a latching arm, the latching element adapted to be displaced upon receipt of the latching arm between a latching position, in which the latching element engages the latching arm such that the cover is secured to the base, and an open position, in which the latching element disengages the latching arm such that the cover is able to be removed from the base.

[0022] In some forms, the disclosed latch may provide a simple and efficient mechanism for securing the pillar from unauthorised access.

[0023] In some forms, the latch may comprise a housing (e.g. a cap) in which the displaceable latching element is mounted, the housing being configured to be seated on the first end of the cover in use.

[0024] In some forms, the latching arm extends from the distal end of the column, the latching arm extending along an axis that is coincident with a longitudinal axis of the unit. This may enable the latching arm to extend through the cover of the unit and into the housing. 6 2017100122 01 Feb 2017 [0025] In some forms, the latching arm may comprise an annular groove formed within a side wall of the latching arm, the annular groove arranged to receive and engage the latching element in the latching position.

[0026] In some forms, the latching element may comprise a support structure to which a pair of locking arms are pivotally connected, the locking arms being adapted to be received within the annular groove of the latching arm in the latching position. The support structure (e.g. a guide plate) may enable the latching arms to be positioned adjacent to one another, pivot about offset axes and move along the same plane.

[0027] In some forms, each locking arm may comprise a recess in a side wall thereof, and when in the latching position, the recesses of the locking arms are positioned adjacent to one another to form a passage therebetween for the receipt of the latching arm.

[0028] In some forms, the latching arm may comprise an arcuate cam surface (e.g. a rounded surface) configured to pivotally displace each locking arm away from one another when the cam surface of the latching arm is received within the passage formed between the locking arms. This may enable the locking arms to be displaced (e.g. separated from one another) towards an open position as the operator locates the housing on the latching arm (e.g. the operator may not be required to perform another action to separate the locking arms and lock the housing to the cover).

[0029] In some forms, the latching element may comprise a biasing member connected to each locking arm, the biasing member being configured to bias the locking arms towards each other, the biasing member being connected at a first end of each locking arm, the first end of each locking arm being disposed at an opposite end to the pivotal connection between each locking arm and the guide. This arrangement may enable the locking arms to be displaced (e.g. re-connected to one another) towards a closed position as the operator locates the housing on the latching arm (e.g. again, the operator may not be required to perform another action to reconnect the locking arms and lock the housing to the cover).

[0030] In some forms, each locking arm may comprise a second recess in the sidewall thereof, the biasing member being mounted within the second recess of each locking arm. The positioned of the biasing member may allow for the biasing means to be positioned on the same plane along which the locking arms move without interfering with the operating of the latch. 7 2017100122 01 Feb 2017 [0031] In some forms, the latch may comprise a key operated lock mounted to the housing, the lock being configured to displace the locking arms such that the locking arms are released from the annular groove of the latching arm and the housing is able to moved away from the cover. This may allow for the latch to be unlocked by select operators (e.g. operators having a key for access to the lock).

[0032] In some forms, the lock may be mounted on a rotatable plate from which a pair of spaced first pins extend, and wherein the locking arms each may comprise a second pins, the first pins being perpendicular to the second pins and positioned between the second pins such that rotation of the plate causes the first pins to rotate and thereby separate the second pins, displacing the locking arms towards the open position.

[0033] In some forms, the latch may further comprise a cone mounted within the housing, the cone configured to receive and guide the latching arm towards the latching element. The provision of the cone may allow for the operator to roughly place the housing (e.g. cap) on the cover (i.e. the passage between the locking arms does not need to be perfectly aligned with the latching arm as the gone will guide the latching arm towards to the passage as the operator locates the housing on the cover).

[0034] Also disclosed herein is a latch for a cross connection unit, the cross connection unit comprising a base for supporting the unit on a surface and arranged to direct cables of a telecommunications network into the unit, an elongate column supported by and extending from the base, and a removeable cover supported by the base. The latch may comprise a housing in which a displaceable latching element is mounted, and a latching arm mounted to the unit, the latching element adapted to be displaced upon receipt of the latching arm between a latching position, in which the latching arm engages the latching arm such that the cover is secured to the base, and an open position in which the latching element disengages the latching arm such that the cover is able to be removed from the base.

[0035] Also disclosed herein is a method of retrofitting a cross connection unit with a latch, the cross connection unit comprising a base for supporting the unit on a surface and arranged to direct cables of a telecommunications network into the unit, an elongate column supported by and extending from the base, and a removeable cover supported by the base. The method may comprise mounting a latching arm to a distal end of the column such that the latching arm extends through the cover when positioned on the base, the latching arm comprising an annular 2017100122 01 Feb 2017 8 groove formed within a side wall of the latching arm, the annular groove arranged to receive and engage a displaceable latching element mounted within a housing that is configured to be seated on the cover such that the cover is secured to the base.

[0036] Also disclosed herein is cross connection unit for a telecommunications network. The unit may comprise: a base for supporting the unit on a surface, the base having a channel disposed therethrough that is arranged to direct cables of the telecommunications network into the unit; an elongate column supported by and extending from the base, the column having a distal end that is spaced from the base; and a removeable cover having a peripheral wall and a lid, the lid having an aperture configured to receive the distal end of the column to locate the cover with respect to the base, wherein a cavity is defined by the base, wall and lid that provides an enclosed space for the cross connection of the cables when the cover is located with respect to the base; and wherein the lid is formed from sheet metal.

[0037] The provision of a cover lid formed from sheet metal may allow for the weight of the cover to be substantially uniformly distributed (e.g. the cover may not be top heavy), enabling the cover to be lifted and manipulated relatively simply.

[0038] In some forms, the wall thickness of the lid is 2-3mm.

[0039] In some forms, the cover is in the form of a cylinder, the peripheral wall having a wall thickness of 2-3mm.

[0040] In some forms, the cover weighs 5.5-8kg. This may allow the cover to be lifted from the cross-connection unit relatively easily.

[0041] In some forms, the unit may further comprise an annular bottom seal located about a side wall of a first end of the base, the first end of the base positioned away from the surface in use. 9 2017100122 01 Feb 2017 [0042] In some forms, the bottom seal comprises an annular body and a resilient lip projecting from the body, the lip being arranged to engage the peripheral wall of the cover when the cover is located with respect to the base, wherein engagement between the lip and the peripheral wall of the cover causes the lip to flex downwardly towards the surface as the cover is located with respect to the base to create a seal between the cover and the base.

[0043] In some forms, the peripheral wall of the cover comprises: a cylindrical portion that extends from the cover lid towards the base in use, a skirt that is connected to and forms an extension of the cylindrical portion at a proximal end of cover, the proximal cover end being located towards the base in use, and a shoulder disposed between the cylindrical portion and the skirt; wherein the skirt is adapted to engage the lip of the seal as the skirt moves downwardly towards the surface in use to flex the lip, and the shoulder is adapted to sealingly engage the flexed lip to thereby create a seal between the cover and the base.

[0044] In some forms, the column may comprise a collar, the collar being positioned such that the distal end of the column extends through and projects from the collar, and wherein the collar provides a seat for the cover lid when the cover is located with respect to the base.

[0045] In some forms, the collar may comprise a top surface to which a top seal is mounted, the top seal configured to sealingly engage the cover lid when the cover lid is seated on the collar to inhibit the egress of water through the lid aperture and into the unit.

[0046] In some forms, the cover lid comprises a dimple that surrounds the lid aperture and projects from the cover lid, the dimple being configured to inhibit the egress of water through the lid aperture.

[0047] Also disclosed herein is a removable cover for a telecommunications network cross connection unit, the unit comprising a base for supporting the unit on a surface and arranged to direct cables of the telecommunications network into the unit, and an elongate column supported by and extending from the base, the cover comprising a peripheral wall and a lid, the lid having an aperture configured to receive the distal end of the column to locate the cover with respect to the base, wherein a cavity is formed between the base, wall and lid that 10 2017100122 01 Feb 2017 provides an enclosed space for the cross connection of the cables when the cover is located with respect to the base; and wherein the lid is formed from sheet metal.

[0048] Also disclosed herein is a cross connection unit for a telecommunications network. The unit may comprise: a base for supporting the unit on a surface, the base having a channel disposed therethrough that is arranged to direct cables of the telecommunications network into the unit; an elongate column supported by and extending from the base, the column having a distal end that is spaced from the base; and a removeable cover, the cover having an aperture configured to receive the distal end of the column to locate the cover with respect to the base, wherein a cavity is defined by the base and cover that provides an enclosed space for the cross connection of the cables when the cover is located with respect to the base; and an annular bottom seal located about a side wall of a first end of the base, the first end of the base positioned away from the surface in use, the seal comprising an annular body and a resilient lip projecting from the body, the lip being arranged to engage the cover when the cover is located with respect to the base, wherein engagement between the lip and the cover causes the lip to flex downwardly towards the surface as the cover is located with respect to the base to create a seal between the cover and the base.

BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Embodiments will now be described by way of example only, with reference to the accompanying drawings in which: [0050] Fig. 1 shows a perspective view of the cross connection unit according to an embodiment of the invention; [0051] Fig. 2 shows an exploded view of the cross connection unit shown in Fig. 1; [0052] Fig. 3 shows an exploded view of the cap latch components according to an embodiment of the invention; 11 2017100122 01 Feb 2017 [0053] Figs. 4a-b shows perspective views of the cross connection unit shown in Fig. 1 with the cap attached (a) and removed (b); [0054] Figs. 5a-c show perspective views of cap latching components shown in Fig. 3 with the latch it its initial state (a), in the displace position (b) and in the latched position (c); [0055] Figs. 6a-b show a cut away perspective view of the latch (a) shown in Fig. 3 and a cross-sectional side view through the locking cap (b) shown in Fig. 3 attaching to a latching arm; [0056] Fig 7 shows a perspective view of the cross connection unit shown in Fig. 1 with the cover lifted from the base; [0057] Figs. 8 shows a cut-away side view through the base of the cover of the pillar shown in Fig. 1; [0058] Figs. 9 shows another cut-away side view through base of the cover of the pillar shown in Fig. 1; [0059] Fig. 10 shows a perspective view of a column mounted on the base of the pillar shown in Fig. 1; [0060] Figs. 1 la-c show perspective views of the base and column shown in Fig. 10 in the detached position (a) and in the attached positions (b & c); and [0061] Figs. 12a-b shows perspective views of a pillar of the prior art with the post attached (a) and removed (b).

DETAILED DESCRIPTION

[0062] In the following detailed description, reference is made to accompanying figures which form a part of the detailed description. The illustrative embodiments described in the detailed description, depicted in the figures and defined in the claims, are not intended to be limiting. Other embodiments may be utilised and other changes may be made without departing from the scope of the subject matter presented. As will be readily apparent to the skilled addressee, the aspects of the present disclosure, as generally described herein and illustrated in the figures can be arranged, substituted, combined, separated and designed in a wide variety of different configurations, all of which are contemplated in this disclosure. 12 2017100122 01 Feb 2017 [0063] Disclosed herein is an external cross connection unit for a telecommunications network. Fig. 1 shows a perspective view of the cross connection unit, in the form of a telecommunications pillar 1. The pillar 1 includes a base 3 for supporting the unit on a surface (e.g. a ground surface, a concrete pad). The base 3 includes an annular flange 5 that is used to secure the pillar to the ground. The base 3 includes a cavity (e.g. a channel) that is open at both its underside and top to allow for cables of the telecommunications network to be directed from below the base into the pillar 1. The pillar also includes a removeable cover, in the form of a cylinder 7, that is supported by the base 3. A pair of handles 9 extend from the external wall of the cylinder 7 that allow for the cover to be lifted and removed from the base 3 such that the internally located telecommunications cables and connectivity can be accessed. In the detailed embodiment the handles 9 are 35mm in diameter. The cylinder 7 is open at the end located adjacent the base 3 to allow cables of the telecommunications network to be directed from the base 3 into the cylinder 7. A locking cap 11 is connected to the top of the pillar 1 to secure the cylinder 7 to the base 3.

[0064] The connection between the cylinder 7 and the base 3 will now be described in further detail with reference to Fig. 2. Fig. 2 shows an exploded view of the pillar 1. The pillar 1 includes an elongate column 13 supported by and extending from the base 3. A distal end 15 of the column 13 is spaced from the base 3. The cylinder 7 includes an aperture 17 at a first end 19 of the cylinder 7. The aperture 17 is configured to receive the distal end 15 of the column 13 to locate the cylinder 7 with respect to the base 3. To remove the cylinder 7 from the base 3, the user grips the handles 9 of the cylinder 7 and lifts the cylinder 7 up and over the column 13. To reposition the cylinder 7 on the base, the user places the cylinder 7 over the column 13 and locates the distal end 15 of the column 13 in the aperture 17. When the cylinder 7 is positioned over the column 13 and on the base 3, an internal cavity is defined by the base 3 and the cylinder 7 that provides an enclosed space for the cross connection of the cables of the telecommunications network.

[0065] The locking cap 11 is provided to secure the cylinder in position on the base 3. In the detailed embodiment, the locking cap 11 clips onto the distal end 15 of the column 13 to secure the cover 7 to the base 3. To enable the locking cap 11 to clip onto the distal end 15 of the column 13, the pillar 1 includes a latch. The latch will now be described in detail with reference to Figs. 2 to 6. Fig. 3 shows an exploded view of the latch components. The latch includes a displaceable latching element 21 and a latching arm 23. The displaceable latching element 21 is adapted to be displaced upon receipt of the latching arm 23, in the form of a stud 13 2017100122 01 Feb 2017 (e.g. spigot) 23, between a latching position, in which the latching element 21 engages the stud 23 such that the cover 7 is secured to the base 3 (see Fig. 4a), and an open position, in which the latching element 21 disengages the stud 23 such that the cover 7 is able to be removed from the base 3 (see Fig. 4b).

[0066] As shown in Figs. 2 & 3, the latch comprises a housing, in the form of the cap 11, in which the displaceable latching element 21 is mounted. The cap 11 is configured to be seated on the first end 19 of the cover 7. The stud 23 extends from the distal end 15 of the column.

The stud 23 extends along an axis that is coincident with a longitudinal axis A of the pillar 1. The stud 23 has a hexagonal cross section at its lower end 24 and a conical potion 28 extending from the lower end 25. The hexagonal cross section of the stud 23 at its lower end 24 is received within the hexagonal aperture 17 (see Fig. 2) of the cover 7. The stud 23 includes an annular groove 25 formed within a side wall 27 of the stud 23. The annular groove 25 is arranged to receive and engage the latching element 21 in the latching position. The latching element 21 includes a support structure, in the form of a guide plate 29, to which a pair of locking arms 31a, 31b are pivotally connected. In the detailed embodiment, each locking arm 31a, 31b is pivotally connected at a different location on the guide plate 29 (i.e. the arms do not pivot about the same axis, instead they pivot about separate axes that are parallel and offset from one another). As will be evident to the skilled addressee, the arms 31a, 31b could be connected such that they pivot about the same axis. The locking arms 31a, 31b are formed from plates that are shaped (i.e. their depth is adapted) such the plates 31 are each able to be received within the annular groove 25 of the stud 23 in the latching position.

[0067] Figs. 5a-c show the co-operation between the stud 23 and the latching element 21. Fig. 5a shows the latching element 23 in its initial state (e.g. natural, unbiased), prior to insertion of the stud 23. Fig. 5b shows the latching element 23 in a displaced / open position as the stud 23 is inserted into the latching element 23. Fig. 5c shows the latching element 21 in the latched positioned, whereby the latching arms 31a, 31b are each received within the groove 25. As shown in Fig. 5a, each locking arm 31a, 31b includes a recess 33a, 33b in a side wall thereof (i.e. in an edge of the plates). When in the initial (Fig. 5a) and latching (Fig. 5c) positions, the recesses 33a, 33b of the locking arms 31a, 31b are positioned adjacent to one another to form a passage 35 therebetween for the receipt of the stud 23.

[0068] The stud 23 includes an arcuate cam surface 37 configured to pivotally displace the locking arms 31a, 31b away from one another when the cam surface 37 of the stud 23 is 14 2017100122 01 Feb 2017 received within the passage 35 formed between the locking arms 31a, 31b (as shown in Fig. 5b). As the cam surface (e.g. pin head) 37 of the stud 23 is inserted into the passage 35 (as shown in Fig. 3), the latching arms 31a, 31b pivot about their respective pivot points and move away from one another to increase the diameter of the passage such that the head of the stud 23 is able to be received between the arms 31a, 31b.

[0069] The latching element also includes a biasing member, in the form of a spring 39, that is connected to each locking arm 31a, 31b. The spring 39 is configured to bias the locking arms 31a, 31b towards each other (i.e. towards the initial / latched position). The spring 39 is connected at a first end 41a, 41b of each locking arm 31a, 31b. The first end 41a, 41b of each locking arm 31a, 31b is disposed at an opposite end to the pivotal connection between each locking arm 31a, 31b and the guide plate 29 (as shown in Fig. 3). Each locking arm 31a, 31b comprises a second recess 43a, 43b in the sidewall thereof (i.e. in the edge of the plate) within which the biasing member 39 is mounted. This arrangement ensures that the two arms 31a, 31b are able to rest against one another in the latching / initial positions (i.e. the spring does not inhibit the plates from resting against each other).

[0070] The latch comprises a key operated lock 45 mounted to the cap 11. The lock is configured to displace the locking arms 31a, 31b such that the locking arms 31a, 31b are released from the annular groove 25 of the stud 23 and the locking cap 11 is able to moved (e.g. lifted) away from the cover 7. The lock 45 is mounted on a rotatable plate 47 from which a pair of spaced first pins 49a, 49b extend. The locking arms include second pins 51a, 51b that are disposed at an opposite end to the pivotal connection points between the guide plate 29 and the arms 3 la, 3 lb and extend from an underside of the arms. The first pins 49a, 49b are perpendicular to the second pins 5 la, 5 lb and positioned between the second pins 5la, 5 lb such that rotation of the lock 45 and plate 47 causes the first pins to rotate 49a, 49b and thereby separate the second pins 51a, 51b, displacing the locking arms 31a, 31b towards the open position (i.e. to increase the diameter of the passage 35). As will be evident to the skilled addressee, the pins could be mounted directly to the cylinder lock, or to any other structure that is connected to the lock. Further, while two pins are described in the detailed embodiment, any number of pins could be used to achieve a similar function or a plate could be used in lieu of or in addition to the pins.

[0071] The latch includes a cone 53 mounted within the cap 11 that is configured to receive and guide the stud 23 towards the passage 35 and into the latched position. The cone 53 is 15 2017100122 01 Feb 2017 mounted to the guide plate 29 and projects away (e.g. slopes away) from the passage 35 (i.e. the diameter of the cone is relatively narrow adjacent the passage 35 and relatively wide away from the passage 35). This arrangement means that when the locking cap 11 is place over the cover 7 (i.e. to secure the cover to the base), passage 35 in the latch 21 does not need to be precisely aligned with the head of the stud 23. Instead, the cap 11 can be placed approximately centrally on the cover and the cap will then self-locate by guiding the head of the stud 23 into the passage 35 between the arms 31a, 31b. The cap 11 is a solid metal structure in the detailed embodiment. As such, when located over the cover 7, the cap 11 obscures the stud 23 from view, making alignment difficult. The cone 53 assists to alleviate these alignment difficulties.

[0072] Further views of the latch are shown in Figs. 6a-b. Fig. 6a shows a cut away perspective view of the latch and Fig. 6b shows a cross-sectional side view through the locking cap. Both Figs. 6a-b show the latch in the latched position.

[0073] In the detailed embodiment, specific components of the latch are described as being located on the cover, column and cap. As will be evident to the skilled addressee, alternative embodiments could achieve a similar latching or 'clip-on' functionality. For example, the positioning of the latching element 21 and stud 23 could be reversed (e.g. the displaceable latching structure could be mounted within the cover or to the column, while the stud is located in the cap). In another embodiment, the stud may not be centrally located with respect to the longitudinal axis of the pillar. For example, one or more studs may be mounted to the top of the cover that latch with co-operating displaceable latching structure(s) located within the cap.

[0074] In the detailed embodiment, the stud 23 forms an extension to the central column, effectively defining the distal end of the column. The stud 23 is formed separately to the column and then connected (e.g. welded) to the column. In some embodiments, the stud and column may be integrally formed, friction fitted, threadably connected, pinned, etc.

[0075] The detailed latch arrangement can be retrofitted to existing pillars. For example, the existing post of an existing pillar could be replaced to include a column with the stud according to the present disclosure. Alternatively, the stud could be attached to the end of an existing column (e.g. the end of the existing column could be shortened and then a stud of the present disclosure could be connected to the existing column). The existing lid can then be replaced with a lid / cap in accordance with the present disclosure. 16 2017100122 01 Feb 2017 [0076] The cover 7 and the connection between the cover 7 and base 3 will now be described in further detail with reference to Fig. 7. Fig 7 shows a perspective view of the cover 7 lifted (e.g. detached) from the base 3. The cover 7, again shown as a cylinder 7, includes a peripheral wall 55 and a lid 57. As previously described, the cylinder lid 57 includes a centrally positioned aperture, in the form of hexagonally shaped aperture 17, configured to receive the distal end of the column (e.g. the stud 23 connected at the distal end of the column) to locate the cylinder 7 with respect to the base 3. The lid 57 is formed from sheet metal (e.g. aluminium) in the detailed embodiment. This enables the weight of the cylinder 7 to be approximately evenly distributed, ensuring that cylinder is not top heavy and difficult to handle. In the detailed embodiment, the lid 57 is welded to the end of the cylinder 7. However, as will be evident to the skilled addressee, alternative connection means could be utilised (e.g. the lid may include a threaded skirt that allows the lid to be threaded onto the cover). The lid could also be connected such that it is spaced (e.g. recessed) from the end of the cylinder. In the detailed embodiment, the cover is described as being a cylinder. As will be evident to the skilled addressee, other shapes could be utilised (e.g. a square cover having a peripheral wall and lid).

[0077] The wall thickness of the lid is between 2-3mm, the wall thickness of the cylinder is also between 2-3mm and the cylinder weighs between 5.5-8kg. This makes the cylinder relatively easy to handle, allowing for the cylinder to be relatively easily lifted and removed from the base during maintenance of the pillar.

[0078] In this embodiment (Fig. 7), pillar 1 includes an annular bottom seal, in the form of a ring seal 59, that is located about a side wall 61 of a first end 63 of the base 3. The first end 63 of the base 3 is positioned away from (e.g. spaced from) the ground surface in use. The seal 59 will now be described in further detail with respect to Figs. 8 & 9. Figs. 8 & 9 show cut-away side views through the cylinder 7. The seal 59 comprises an annular body 65 and a resilient annular lip 67 projecting from the body 65. The lip 67 is arranged to engage an inner surface of the peripheral wall 55 of the cylinder 7 when the cylinder 7 is located with respect to the base 3 (e.g. is secured to the base - see Fig. 9). Engagement between the lip 67 and the peripheral wall 55 of the cylinder 7 causes the lip 67 to flex downwardly towards the ground surface (e.g. in the direction of movement of the cylinder 7) as the cylinder 7 is located with respect to the base 3 to create a seal between the cylinder 7 and the base 3. 17 2017100122 01 Feb 2017 [0079] The peripheral wall 55 of the cylinder 7 includes a elongate cylindrical portion 68 that extends from the cylinder lid 57 (as shown in Fig. 7) towards the base 3 in use. The wall 55 also includes a skirt 69 that is connected to and forms an extension of the cylindrical portion 67 at a proximal end 71 of cylinder 7, the proximal end 71 being located towards the base 3. The skirt 69 extends in a direction that forms an acute to the direction along which the elongate cylindrical portion 68 extends (e.g. the skirt is flared). A shoulder 73 is disposed at the junction between the cylindrical portion 55 and the skirt 69. An inner wall of the skirt 69 is adapted to engage the lip 67 of the seal 59 as the skirt moves downwardly towards the ground surface in use to flex the lip 67, and the shoulder 73 is adapted to sealingly engage the flexed lip (see Fig. 9) to thereby create a seal between the cylinder 7 and the base 3. This arrangement allows for the cover and the base to be self-sealing. When located over the column, as previously described, the cover can then be lowered such that the proximal end 71 of the cover 7 rests against the seal 59 and then released, allowing the gravity to force the cover 7 down and over the seal 59. This arrangement may avoid the requirement of special tools (e.g. a nut, spanner) to force the cover downwardly and over a seal (e.g. an o-ring) to thereby create a seal between the cover and the base.

[0080] The column will now be described in further detail with reference to Figs. 10 & 11. Fig. 10 shows a perspective view of the column mounted on the base. Fig. 1 la shows a perspective view of the base and column in the detached position (i.e. the column is not mounted to the base). Figs. 1 lb and 1 lc show perspective side views of the base and column in the attached positioned (i.e. the column is mounted to the base). The column includes a collar (e.g. guard plate) 75, the collar 75 being positioned such that the distal end 15 of the column 13 extends through and projects from the collar 75. In the detailed embodiment, the collar 75 is approximately 260mm in diameter. The collar 75 provides a seat for the cylinder lid 57 (see Fig. 7) when the cylinder is located with respect to the base 3. The collar 75 includes a plurality of spacers 76 disposed about the top surface 77 of the collar 75 for spacing the lid 57 (see Fig. 7) of the cover 7 from the collar 75. A seal, in the form of a foam seal 78, is mounted on the top surface 77 of the collar 75. The seal 78 is configured to sealingly engage the cylinder lid 57 when the cylinder lid 57 is seated on the collar 75 (e.g. by filling the space between the aperture 17, see Fig. 7, and the stud 23) to inhibit the egress of water through the lid aperture 17 and into the pillar. As shown in Fig. 7, cylinder lid 57 includes a dimple 79 that surrounds the lid aperture 17 and projects from the cylinder lid 57, the dimple being configured to inhibit 18 2017100122 01 Feb 2017 the egress of water through the lid aperture (e.g. if water pools on the lid, the dimple gradient inhibits the flow of water from the lid surface into the aperture).

[0081] As shown in Figs 10 and 11, the base 3 includes a plurality of apertures 81 through a surface 83 of the base 3 that is disposed at the end 63 of the base 3 to allow the cables to be directed out of a cavity of the base 3.

[0082] As more clearly shown in the embodiment of Figs 1 la-c, the apertures 81 include a plurality of first apertures 85 disposed radially about the surface 83 and a second aperture 87 centrally located with respect to the surface 83 and surrounded by the first apertures 85. Towards a proximal end 89 of the column 13, spaced legs 91, 93 are provided and adapted to be mounted on either side of the second aperture 87 such that the second aperture 87 is open to allow cables to be directed therethrough. This allows for the centre aperture to be used for telecommunications cables, therefore increasing the potential capacity of the cross connection unit (e.g. additional telecommunications cables can be fed into the pillar).

[0083] The column 13 includes a mounting flange 95 disposed at the proximal end 89 of the column 13, the flange 95 including at least one aperture configured to receive at least one fastener for mounting the column 13 to the second end 63 of the base. Each leg 91, 93 of the column 13 includes a pair of arcuate mounting flanges 95a, 95b, each flange 95a, 95b being configured to curve around a portion of the second aperture 87. The base 3 includes at least one mounting aperture configured to align with the mounting aperture of the column flange 95a, 95b in use and receive the at least one fastener for mounting the column to the second end of the base 3.

[0084] The column 13 includes an elongate cylindrical portion 97 that extends along the longitudinal axis A of the pillar, the cylindrical portion 97 being disposed towards the distal end 15 of the column 13. The pair of legs 91, 93 are connected to the cylindrical portion 97 such that each leg 91, 93 extends from the cylindrical portion 97. Each leg 91, 93 includes first 99 and second 101 elongate leg portions, the first leg portion 99 being connected to the cylindrical portion 97 and extending downwardly from the cylindrical portion along a first longitudinal axis B (see Fig. 1 lb) of the first leg portion 99. The first axis B forms an acute angle with the longitudinal axis A of the pillar. The second leg portion 101 extends from the first portion 99 along a second longitudinal axis C (see Fig. 1 lb) of the second leg portion. The second longitudinal axis C is parallel to and offset from the longitudinal axis A of the pillar. 2017100122 01 Feb 2017 19

The base may include a plug 103 that is configured to be received in the second aperture 87. The plug may be useful when there is no requirement to increase the capacity of the cross connection unit (e.g. the radially aligned apertures provide sufficient capacity).

[0085] Advantageously, in certain embodiments the disclosed column can be fitted to existing pillars to increase the capacity of the pillar. As shown in Figs. 12a-b, this involves removing the existing post 105 from the base 3 by disengaging a plurality of fasteners 107 connected to a collar 109 of the post 105. Disengaging the post 105 from the base 3 exposes a centrally located aperture 85. The column according to the various embodiments of present application can then be mounted to the base.

[0086] Where the column is of the configuration shown in Figs.l la-b, such centrally located aperture 85 is open to allow additional cables to be directed therethrough.

[0087] In the claims which follow and in the preceding summary except where the context requires otherwise due to express language or necessary implication, the word "comprising" is used in the sense of "including", that is, the features as above may be associated with further features in various embodiments.

Claims (5)

1. A cross connection unit for a telecommunications network, the unit comprising: a base for supporting the unit on a surface, the base defining a cavity that is open at a first end of the base to allow cables of the telecommunications network to be directed into the cavity, the base comprising a plurality of apertures through a surface of the base that is disposed at a second end of the base to allow the cables to be directed out of the cavity, the apertures comprising a plurality of first apertures disposed radially about the surface and a second aperture centrally located with respect to the surface and surrounded by the first apertures; and an elongate column supported by and extending from the base, the column comprising a distal end that is spaced from the base and a proximal end for mounting the column to the base, the proximal end comprising spaced legs adapted to be mounted on either side of the second aperture such that the second aperture is open to allow cables to be directed therethrough.

2. A unit according to claim 1, wherein the column further comprises a mounting flange disposed at the proximal end of the column, the flange comprising at least one aperture configured to receive at least one fastener for mounting the column to the second end of the base.

3. A unit according to claim 2, wherein each leg of the column includes a pair of arcuate mounting flanges, each flange being configured to curve around a portion of the second aperture.

4. A column for a telecommunications network cross connection unit, the unit comprising a base for supporting the unit on a surface, the base defining a cavity that is open at a first end of the base to allow cables of the telecommunications network to be directed into the cavity, the base comprising a plurality of apertures through a surface of the base that is disposed at a second end of the base to allow the cables to be directed out of the cavity, the apertures comprising a plurality of first apertures disposed radially about the surface and a second aperture centrally located with respect to the surface and surrounded by the first apertures; the column being elongate and configured to be mounted to the base such that it extends from the base, the column comprising a distal end that is spaced from the base and a proximal end for mounting the column to the base, the proximal end comprising spaced legs adapted to be mounted on either side of the second aperture such that the second aperture is open to allow cables to be directed therethrough.

5. A method of retrofitting a cross connection unit to increase the capacity of the unit, the cross connection unit comprising a base for supporting the unit on a surface, the base defining a cavity that is open at a first end of the base to allow cables of the telecommunications network to be directed into the cavity, the base comprising a plurality of apertures through a surface of the base that is disposed at a second end of the base to allow the cables to be directed out of the cavity, the apertures comprising a plurality of first apertures disposed radially about the surface; the method comprising: removing a post from the base by disengaging a plurality of fasteners connected to a collar of the post and the base second end; forming a second aperture by disengaging the post from the base; and mounting a column to the base second end, the column comprising a proximal end for mounting the column to the base, the proximal end comprising spaced legs adapted to be mounted on either side of the second aperture such that the second aperture is open to allow cables to be directed therethrough.