GB2366084A - Enclosure for electrical equipment - Google Patents

Enclosure for electrical equipment Download PDF

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Publication number
GB2366084A
GB2366084A GB0115541A GB0115541A GB2366084A GB 2366084 A GB2366084 A GB 2366084A GB 0115541 A GB0115541 A GB 0115541A GB 0115541 A GB0115541 A GB 0115541A GB 2366084 A GB2366084 A GB 2366084A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
lt
rti
elongate
strut
struts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB0115541A
Other versions
GB0115541D0 (en )
GB2366084B (en )
Inventor
Jeremy Hartley
Andrew Diss
Michael Cook
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stagwood Industries Ltd
STAGWOOD IND Ltd
Original Assignee
* STAGWOOD INDUSTRIES LIMITED
STAGWOOD IND LTD
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26Casings; Parts thereof or accessories therefor
    • H02B1/30Cabinet-type casings; Parts thereof or accessories therefor
    • H02B1/301Cabinet-type casings; Parts thereof or accessories therefor mainly consisting of a frame onto which plates are mounted
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/02Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C3/06Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web
    • E04C3/07Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web at least partly of bent or otherwise deformed strip- or sheet-like material
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS, OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/20Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
    • H02B1/202Cable lay-outs
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/02Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0408Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section
    • E04C2003/0421Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section comprising one single unitary part
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/02Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0426Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section
    • E04C2003/043Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section the hollow cross-section comprising at least one enclosed cavity
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/02Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0426Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section
    • E04C2003/0439Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section the cross-section comprising open parts and hollow parts
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/02Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0443Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
    • E04C2003/0452H- or I-shaped
    • E04C2003/0456H- or I-shaped hollow flanged, i.e. "dogbone" metal beams
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04CSTRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00Structural elongated elements designed for load-supporting
    • E04C3/02Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0443Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
    • E04C2003/0473U- or C-shaped

Abstract

An enclosure comprises a base frame (40) and top frame (42) interconnected by a plurality of elongate struts (44, 46, 50, 52). The base frame has movable guide rails (70, 72) and the top frame has movable guide rails (106, 108) to which the struts are movably connected such that the position of the struts can be moved in mutually orthogonal directions. The struts carry mounting angles (114, 116) for mounting components within the enclosure and cover panels and doors may be added to enclose the frame structure. The struts comprise first and second hollow sections joined together by an elongate sheet. Cable support means can be snap fitted into the struts for engaging cables within the enclosure.

Description

<Desc/Clms Page number 1> Title: Enclosure Field of the Invention This invention relates to an enclosure for housing electrical equipment, and in particular an enclosure which is used to contain mounted equipment, distribution front panels and subracks used in telecommunication or data communication systems, computer <RTI> file</RTI> servers and modems.

Background to the Invention Enclosures for containing equipment and cabling associated with, for example, telecommunications equipment are well know. Typically these enclosures comprise a base to which the lower end of two or more vertical <RTI> supports</RTI> are attached, with the upper end of the vertical <RTI> supports</RTI> being attached to a top unit to <RTI> form</RTI> a skeleton frame. Within this frame are fitted mounting <RTI> supports</RTI> and a number of panels may be used to clad the enclosure. Components such as <RTI> subracks,</RTI> shelves, <RTI> electrical</RTI> equipment and distribution front panels are secured to the supports and connections made between relevant components using cables. The space remaining within the enclosure once the necessary cable connections have been made tends to be limited as these <RTI> vertical</RTI> <RTI> supports</RTI> form an obstruction to open access. Thus subsequent access to the components or cables can be difficult.

Summary of the <RTI> Invention</RTI> According to one aspect of the present invention there is provided an enclosure for electrical equipment, the enclosure comprising a base frame and a top frame interconnected by a plurality of elongate struts, wherein the base frame <RTI> further</RTI> comprises first guide means and the top frame comprises second guide means, such that the elongate struts engage with the first and second guide means, the first guide means and the second guide means co-operating to allow relative movement of the elongate struts in two mutually orthogonal directions.

<Desc/Clms Page number 2>

Each elongate strut, of which there are a minimum of two but more usually four, preferably <RTI> further</RTI> comprises mounting means for mounting racks and other equipment, each mounting means moving with the respective strut.

By ensuring that the <RTI> struts</RTI> with or without their respective mounting means are able to move in two orthogonal directions defined by the first and second guide means, the spacing between <RTI> struts</RTI> <RTI> can</RTI> be readily adjusted to that different sizes and <RTI> configurations</RTI> of electronic equipment, racks and communications equipment and the like can be accommodated. Each strut is independently moveable of the other <RTI> struts</RTI> and the movement of the <RTI> struts</RTI> and mounting means in combination ensures that assembly is simplified, as the need to attach the mounting means separately to the base frame is avoided. The movement in unison of each <RTI> strut</RTI> with its mounting means also ensures that subsequent adjustments of the spacing between struts from an initial chosen position is simplified as effectively only the position of the struts needs to be adjusted, not the positions of both <RTI> struts</RTI> and the mounting means separately.

Preferably the mounting means is detachable so that if desired the mounting means can be affixed to a respective strut after the strut is placed at a chosen position. Detachable mounting may be achieved by a screw fixing, clip fastening or other equivalent. Typically the mounting means comprises an elongate <RTI> strip</RTI> of L-shaped cross-section which provides a first flange for attaching to the strut and a second flange extending at right angles to the strut, the second flange comprising a plurality of apertures to which equipment such as racks, shelves and the like can be secured.

The apertures in the <RTI> struts</RTI> are generally square in shape of dimension <RTI> 9.5mm</RTI> by 9.5 mm to hold a universal fixing, although in accordance with another feature of the invention desirably some of the apertures are generally <RTI> cruciform</RTI> in shape, having two slots <RTI> arranged</RTI> in a cross shape, with the width of each slot differing so that components of two different dimensions can be placed into the aperture. This ensures that different size components can be accommodated, such as a universal fixing or other standard fixings. Thus typically the width of one pair of <RTI> arms</RTI> will be <RTI> 5mm</RTI> and the width of the other pair of arms will be <RTI> 9.5mm.</RTI> Typically a strut has generally <RTI> cruciform</RTI> apertures in combination with square

<Desc/Clms Page number 3>

<RTI> apertures,</RTI> two square apertures being provided to one generally <RTI> cruciform</RTI> <RTI> aperture</RTI> in a repeating series along the length of the strut.

Preferably the first guide means comprises a first pair of support rails which allow movement of struts in a primary direction along the length of each rail.

The first guide means may <RTI> further</RTI> comprise a first lip and a second lip, each <RTI> support</RTI> rail engaging with the first lip and the second lip and being movable in a secondary direction defined by the lips, thereby to allow movement of the elongate struts along the secondary direction.

Typically the second guide means has the same structure as the <RTI> first</RTI> guide means. Thus the second guide means preferably comprises a second pair of <RTI> support</RTI> rails which allow movement of struts in the primary direction.

The second guide means may <RTI> further</RTI> comprise a third lip and a <RTI> fourth</RTI> lip, each <RTI> support</RTI> rail in the second pair of <RTI> support</RTI> rails engaging with the third lip and the <RTI> fourth</RTI> lip and being moveable in the secondary direction.

Generally the top frame overlies the base frame, so that the <RTI> first</RTI> pair of <RTI> support</RTI> rails and the second pair of <RTI> support</RTI> rails overlie one another, the <RTI> first</RTI> lip overlies the third lip, and the second lip overlies the fourth lip.

<RTI> An</RTI> elongate strut is typically held in an upright position by engaging at its lower end with one <RTI> support</RTI> rail held in the base frame, and by engaging at its upper end with another <RTI> support</RTI> rail held in the top frame. The strut can then be moved along both guide rails simultaneously to adjust the position of the strut in the primary direction. <RTI> This</RTI> ensures that where two or more elongate struts are held between a first <RTI> support</RTI> rail and a second <RTI> support</RTI> rail, the position of the struts can be altered by sliding the struts along the rails so as to adjust the spacing between the struts in the primary direction.

<Desc/Clms Page number 4>

The spacing between the struts in the secondary direction is altered by moving the first and second pairs of <RTI> support</RTI> rails along the lips.

The support rails may have a rectangular box section with the elongate struts preferably having a complimentary <RTI> inverted</RTI> cross-section at their upper and lower ends, so as to form a sliding fit with the support rails. In an alternative embodiment, the support rails may have a U-shaped cross-section, so as to provide a channel with raised runners on either side, the elongate struts having a complimentary <RTI> inverted</RTI> U-shaped cross-section. The sliding of the strut along the support rail is relatively controlled and stable because of the large contact area between each <RTI> strut</RTI> and each rail.

The contact area between the strut and the rail may be <RTI> further</RTI> increased by fixing a foot member to the end of the elongate strut. Thus desirably each elongate strut may comprise a first foot member fixed to a lower end of the strut, and a second foot member attached to an upper end of the strut, wherein first and second foot members have a complimentary <RTI> inverted</RTI> U-shaped cross-section to the rails and extend beyond the base of the <RTI> strut</RTI> so as to provide an extended contact area with the rail.

The foot member may be in the form of a welded saddle <RTI> permanently</RTI> affixed to the elongate strut, such that sliding contact between the rail and the strut is as a result of interaction between the welded saddle and the rail.

In accordance with another aspect of the invention, there is also provided an elongate strut for use in an enclosure, wherein the strut comprises a first hollow elongate member and a second hollow elongate member, such that the first hollow elongate member and the second hollow elongate member are joined together along their length by an elongate sheet.

The strut is typically made of metal, such as steel, with a wall <RTI> thickness</RTI> of approximately 1.5 mm. The <RTI> structure</RTI> of the strut as set out above improves <RTI> structural</RTI> strength and rigidity when using thin sheets of metal to form the <RTI> strut.</RTI> As the struts can be over 2m in length, <RTI> strength</RTI> and rigidity are important to ensure that components are safely affixed to, and held by, mounting means attached to the struts.

<Desc/Clms Page number 5>

The first elongate member and second elongate member have a generally circular <RTI> cross-</RTI> <RTI> section</RTI> and are each of a first radius, the first radius being equal to or greater than a minimum bend radius for cables, thereby to ensure that cables passed around the <RTI> strut</RTI> maintain their structural integrity. The radius of <RTI> curvature</RTI> is selected so that it corresponds to the minimum radius to which cable can be bent without becoming damaged. This ensures that cables used within the enclosure and passed around the strut cannot be <RTI> inadvertently</RTI> bent to a smaller radius than the minimum bend radius which needs to be maintained for structural integrity of the cable.

<RTI> Where</RTI> both the first hollow elongate member and a second hollow elongate member have the preferred cross-section as described above, the overall cross-section of the <RTI> strut</RTI> can be likened in appearance to a bone, comprising a central elongate section with a shaped ball at either end.

The elongate strut may be provided with a plurality of <RTI> apertures</RTI> along the length of the elongate sheet, which reduces the weight of the strut. These <RTI> apertures</RTI> also allow fixing of mounting means, such as mounting angles, to the strut and shelves and other equipment can be also be secured.

Preferably the elongate <RTI> strut</RTI> has an inverted U-shaped cross-section at its upper and lower ends. The elongate strut may <RTI> further</RTI> comprise a first foot member fixed to a lower end of the strut, and a second foot member attached to an upper end of the strut, wherein the first and second feet members have an inverted U-shaped cross-section and extend beyond the base of the <RTI> strut.</RTI> The foot member may be in the form of a welded saddle permanently <RTI> affixed</RTI> to the elongate <RTI> strut.</RTI>

Other apertures may be provided in the hollow elongate members of the strut so as to p <RTI> rovi</RTI> <RTI> ide</RTI> <RTI> f</RTI> <RTI> ixing</RTI> <RTI> for</RTI> <RTI> connectors.</RTI> <RTI> Thus</RTI> <RTI> typically</RTI> <RTI> groups</RTI> <RTI> of</RTI> <RTI> three</RTI> <RTI> apertures</RTI> <RTI> are</RTI> <RTI> spaced</RTI> <RTI> along</RTI> <RTI> the</RTI> length of the elongate strut on the first and third walls, and the fifth and seventh walls, such that a first group of <RTI> apertures</RTI> on the first wall opposes a second group of <RTI> apertures</RTI> on the third wall and a third group of <RTI> apertures</RTI> on the fifth wall opposes a fourth group of apertures

<Desc/Clms Page number 6>

on the sixth wall. Snap fit cable <RTI> support</RTI> means can then be attached to the apertures by means of a simple push fit or a universal fixing for the attachment of accessories can be used.

In accordance with another aspect of the invention, there is also provided a cable support means comprising a base member having an inner face and an outer face, wherein the <RTI> inner</RTI> face <RTI> carries</RTI> engagement means and the outer face comprises a cable holding means, wherein the engagement means forms a snap fit connection when pushed into apertures on an elongate strut. Thus typically spaced pairs of tongues will form a snap fit connection with first and third apertures within a first group of apertures on the strut and a detachable lip will engage with a middle aperture on a corresponding group at the other side of the <RTI> strut.</RTI>

The invention will now be described, by way of example, with reference to the accompanying drawings in which: Figure 1 shows a perspective view from the front and side of an enclosure in accordance with the present invention, the enclosure being clad with a plurality of panels and the top cover removed for clarity; Figure 2 show a perspective view from the front and side of the enclosure without cladding, a base frame, top frame and four elongate <RTI> struts</RTI> being visible; Figure 3 shows a view to an enlarged scale of the base of the enclosure; Figure 4 shows a schematic diagram illustrating positions of the struts; Figure 5 shows a view from underneath of the base; Figure 6 shows a view from above of the top frame; Figure 7 shows a cross-section through a strut;

<Desc/Clms Page number 7>

Figure 8 shows a view from above of the strut with a welded saddle attached; Figure 9 shows a perspective view to an enlarged scale from the front and the side of the enclosure with a plurality of cable management hooks <RTI> attached</RTI> to the <RTI> strut;</RTI> Figure 10 shows a perspective view from the front and the side of the enclosure with cable arms attached to the struts; Figure 11 shows a perspective view of a cable management arm; Figure 12 shows a perspective view of a cable hook; Figure 13 shows a perspective view of a cable hook when attached to a <RTI> strut;</RTI> and Figure 14 shows a view of a mounting angle.

Description In Figure 1, a clad enclosure or cabinet 10 is shown in perspective. The enclosure comprises a base frame 12, and four elongate <RTI> struts</RTI> 14, 16 (of which two are shown) extending from the base to top frame 20. The enclosure is clad with a door panel 22, side panels 24, 26 and rear panel 30. The door 22 pivots about upper and lower pivot pins 32, 34 to allow access to the interior of the enclosure. The door can be hung either left hand or right hand, and opens to 180 and beyond. A top cover (not shown) can be placed over the top frame 20 so that the cabinet is <RTI> fully</RTI> closed. The top cover may include slotted vents, cooling fans, <RTI> breakstrip</RTI> or gland plates. The <RTI> struts</RTI> provide both the frame structure and mounting <RTI> structure</RTI> so eliminating the need for additional members to define the shape of the frame. <RTI> This</RTI> means that the need for a separate <RTI> vertical</RTI> support frame in addition to the <RTI> struts</RTI> is avoided.

For ease of explanation, the enclosure is shown in subsequent Figures without cladding and when used is clad or unclad as <RTI> appropriate</RTI> for the particular application. By placing two or more <RTI> unclad</RTI> cabinets next to one another, it is possible to mount components between

<Desc/Clms Page number 8>

supports in different cabinets. This provides a space saving and also reduces the number of cabinets needed to mount a given number of components. Thus, for example, two cabinets can be used to provide the same mounting space as three separate cabinets.

In Figure 2, the base frame 40 and top frame 42 are interconnected by four elongate <RTI> struts</RTI> 44, 46, 50, 52. The base frame 40 comprises four elongate sections 54, 56, 60 and 62 affixed to one another to form a generally square base. The lengths of the elongate sections may differ if, for example, a rectangular base is required. Elongate sections 54, 60 are each provided with a lip 64, 66, each lip 64, 66 having a series of circular apertures 68 at spaced apart intervals along its length. The base <RTI> further</RTI> comprises two guide rails 70, 72 of substantially box-shaped cross-section. A plurality of circular apertures 80, 82 are provided along the outer edge of each runner for securing the elongate struts 44, 46, 50, 52 to the rails 70, 72 by way of fixings such as bolts and/or nuts.

The top frame 42 similarly comprises four elongate sections 90, 92, 94, 96 affixed to form a square, with facing sections 90, 94 being provided with lips 100, 102 having a series of circular <RTI> apertures</RTI> 104 along their length. The guide rails 106, 108 in the top frame 42 are of the same configuration as those shown within the base frame 40, with an identical <RTI> cross-</RTI> <RTI> section.</RTI>

The elongate <RTI> struts</RTI> 44, 46, 50, 52 are made from steel, or other suitable metal, and each have a foot 110, attached at its upper and lower end, the foot allowing the elongate strut to slide along the guide rails. Mounting angles 114, 116, 118, 120 are attached to each elongate <RTI> strut,</RTI> and components such as racks, distribution panels and shelves or other equipment (not shown) are typically mounted on these mounting angles <RTI> during</RTI> use of the cabinet, although can be mounted direct to the struts in certain circumstances. The struts can be adjusted while these components remain in place on at least some of the mounting angles.

Figure 3 shows a detailed perspective view of the base 40 and corresponding reference numerals to those used in Figure 2 are used where appropriate. The four elongate sections 54, 56, 60, 62 forming the square base can be seen. The sections are held together by welds, although other fixings may be used, or the base moulded as one piece.

<Desc/Clms Page number 9>

Apertures 122, 124, 126, 130 are provided on an upper face 132 of the front elongate section and an upper face 134 of the rear elongate section. Similar opposing apertures are provided on the top frame 42. These apertures accommodate pivot pins (not shown) so that doors can be mounted between the base 40 and top frame 42 without the need for the doors to attach to the uprights 44, 46, 50, 52. The two guide rails 70, 72 extend between the two side elongate sections 54, 60 and where each guide rail overlaps the lip 64, 66, two circular apertures 133 (of which one is shown) are provided at the end of the guide rail. The apertures ensure that if required the guide rails 70, 72 can be firmly secured to the lip 64, 66 at six positions by means of a fixing such as a bolt and/or nut. Without such fixings in place, the guide rails 70, 72 can be slid along the lip in a direction Y so as to adjust the spacing between the guide rails.

First and second elongate struts 50, 52 are mounted on the <RTI> first</RTI> guide rail 70, with third and fourth struts 44, 46, mounted on the second guide rail 72. Sliding movement of the <RTI> struts</RTI> 44, 46, 50, 52 along the rails 70, 72 in direction X alters the distance between the respective pairs of <RTI> first</RTI> and second <RTI> struts</RTI> 50, 52, and third and <RTI> fourth</RTI> struts 44, 46, with each strut being independently moveable of the other struts. A schematic diagram showing how spacings between the struts can be altered in the directions X and Y is shown in Figure 4 and as will be seen, the struts can be arranged to be in a generally rectangular configuration, or in an offset <RTI> rhombahedral</RTI> configuration.

The mounting angles 114, 116, 118, 120 are not shown attached to the struts in Figure 3 for ease of view. However it will be appreciated that once the mounting angles are attached to the <RTI> struts,</RTI> they move with the <RTI> struts</RTI> themselves. Therefore detaching and reattaching of the mounting angles when moving the struts is not necessary as the mounting angles are not mounted separately to the base 40, but rather carried on the struts 44, 46, 50, 52. This also ensures that the positions of the <RTI> struts</RTI> can be altered fairly readily even with components already attached to the mounting angles.

A view from the <RTI> underneath</RTI> of the base 40 is shown in Figure 5. Corresponding reference numerals have been used where appropriate. Nuts and bolts 140', 140", 140"', 142', 142",

<Desc/Clms Page number 10>

l42"', 144', 144", 144"', 146', 146", 146"' affixing guide rails 70, 72 to lips 64, 66 are illustrated, and plates 150, 152, 154, 156 are also illustrated to which wheels 158 or adjustable feet can be attached so that the enclosure is readily moveable or levelled.

A similar view for the top frame 42 as from above is shown in Figure 6, with again nuts and bolts 160, 162 being used to fix each guide rail 106, 108 to each lip 100, 102. Edge trims 172, 174 containing apertures in which corner mouldings, inclusive of pivot pins 176, 178 are placed to provide an integral hinge point are shown attached to front and rear elongate sections 92, 96 of the top frame 42. A door panel is usually attached to the pivot pins to seal off the components in the cabinet, whilst allowing ease of access to the interior of the cabinet.

The elongate struts have a cross-section as shown in Figure 7. Each comprises a first hollow elongate member 200 and a second hollow elongate member 202, such that the first hollow elongate member 200 and the second hollow elongate member 202 are joined together along their length by an elongate continuous sheet 204. The strut is typically made of sheet metal, such as steel, with a wall <RTI> thickness</RTI> of approximately 1.25 mm, the sheet being bent to <RTI> form</RTI> the cross section shown in Figure 7, and elongate sheet 204 having a double wall thickness. The first elongate member 200 is a mirror image of the second shaped portion 202 so that the cross-section is symmetrical about an axis A.

The first elongate member 200 is substantially rectangular in cross-section, comprising two limbs 205, 206 which extend from the central portion 204 and join to form a continuous loop. Limb 205 is <RTI> formed</RTI> by one wall thickness of elongate sheet 204, with limb 206 being <RTI> formed</RTI> from the other wall thickness, and the limbs join together so that elongate member 200 is of substantially one wall thickness along its length. Thus the first limb 205 is an extension of one wall of the central portion 204. A second limb 206 extends from the second wall of the central portion 204, such that the two limbs 205, 206 diverge from one another and then <RTI> re-converge</RTI> so as to form a substantially rectangular area enclosed by the two limbs.

<Desc/Clms Page number 11>

The limbs form a first wall 207, a second wall 208, a third wall 209 and a fourth wall 210. The first and fourth walls 207, 210 are attached to the elongate sheet 204, and the first wall 207 is attached to the second wall 208 by a first curved portion 212, and the second wall 208 is attached to the third wall 209 by a second curved portion 214. The first and second curved <RTI> portions</RTI> have the same radius of curvature originating from a point within the central hollow. The radius of curvature of the curved <RTI> portions</RTI> 212, 214 is selected so that it corresponds to the minimum radius to which cable can be bent without becoming damaged. This ensures that cables used within the enclosure and passed around the <RTI> strut</RTI> cannot be <RTI> inadvertently</RTI> bent to a smaller radius than the minimum bend radius which needs to be maintained for <RTI> structural</RTI> integrity of the cable. A third curved <RTI> portion</RTI> 211 has a different radius of curvature, although again the point of origin of the curve originates from within the hollow.

The second elongate hollow member 202 has an identical cross-section to the first elongate portion, but in mirror image. The second elongate member thus <RTI> comprises</RTI> limbs 214, 216, a fifth wall 218, a sixth wall 220, a seventh wall 222 and an eighth wall 224. <RTI> The</RTI> fifth 218 and eighth 224 walls are attached to central portion 204, the fifth wall 218 is attached to the sixth wall 220 by a third <RTI> curved</RTI> <RTI> portion</RTI> 226, and the sixth wall 220 is attached to the seventh wall 222 by a <RTI> fourth</RTI> curved <RTI> portion</RTI> 228. As with the <RTI> first</RTI> elongate member, the radius of curvature of the curved <RTI> portions</RTI> is selected so that it corresponds to the minimum radius to which cable can be bent without becoming damaged.

This chosen cross-section improves <RTI> structural</RTI> strength and rigidity when using thin sheets of metal to form the strut. As the struts can be over 2m in length, strength and rigidity are <RTI> important</RTI> to ensure that components are safely affixed to, and held by, mounting means attached to the <RTI> struts.</RTI>

The curved edges 212, 214, 226, 228 providing the minimum bend radius of a cable can be seen from Figure 7 not to contain any <RTI> apertures.</RTI> However the first and third walls 207, 209 extending either side of the curved <RTI> portions</RTI> 212, 214 are provided with a series of apertures 230, 232 along the length of the strut, as can be seen in Figure 3. Similarly the fourth and sixth walls 218, 222 extending either side of the curved <RTI> portions</RTI> 226, 228 are also provided

<Desc/Clms Page number 12>

with a series of apertures 234, 236 along the length of the strut. These <RTI> apertures</RTI> allow for snap fit connection of cable supports and cable management <RTI> arms.</RTI> The sheet 204 is also <RTI> apertured</RTI> to reduce the overall weight of the strut, and to allow mounting angles to be readily secured to the strut.

The <RTI> apertures</RTI> 230, 232, 234, 236 extend along the length of the strut in spaced apart groups, as can be seen principally in Figures 3, 9 and 10. Thus as is shown in Figure 10, groups of substantially rectangular <RTI> apertures</RTI> 240, 242, 244 are spaced along the length of the elongate strut on the first and third walls, and the <RTI> fifth</RTI> and seventh walls, such that a first group of <RTI> apertures</RTI> on the first wall opposes a second group of <RTI> apertures</RTI> on the third wall and a third group of <RTI> apertures</RTI> on the fifth wall opposes a <RTI> fourth</RTI> group of <RTI> apertures</RTI> on the sixth wall. Each group of <RTI> apertures</RTI> comprises a top 250,a middle 252 and a bottom 254 <RTI> aperture.</RTI> Snap <RTI> fit</RTI> cable support means can then be attached to the <RTI> apertures</RTI> by means of a simple push fit. Figure 8 shows a detailed view of one foot 300 as attached to an upper end of the vertical upright 46. The foot has a U-shaped cross-section comprising a central channel 310 and vertical side portions 312, 314. The cross-section of the foot 300 is opposite and complimentary to the box-shaped cross-section of the guide rail, so that side <RTI> portions</RTI> 312, 314 extend downwards over the rail to allow channel 310 to engage with, and slide on, the rail.

A perspective view from the front and side of an unclad enclosure 140 with a plurality of cable hooks 142 shown attached to the struts is shown in Figure 9. Other types of cable supports can be attached to the vertical struts, and Figure 10 shows a detailed view of cable management arms 144 attached to the vertical supports. Figure 10 also shows mounting angles 146, 148 attached to the front two vertical supports 52, 54 and extending generally at right angles to the struts so that the apertures within the mounting angle are parallel to the length of the guide rail 72. Each cable management arm 144 clips into one aperture provided on the first limb of the strut and acts to guide cables.

Detailed views of the cable management arm 144 and the cable hook 142 are shown in Figures 11, 12 and 13. The cable management arm 160 shown in Figure 11 comprises an

<Desc/Clms Page number 13>

elongate cylindrical central portion 162 to one end of which is attached a push-fit connector 164, such that when the cable management arm is pushed into an aperture on the strut, the arm is held <RTI> firmly</RTI> in position. A front end 170 of the cable management <RTI> arm</RTI> which extends away from the strut comprises an arm about which cables can be looped or retained behind. The cable hook 142 shown in Figure 12 is moulded from plastics material and comprises a central <RTI> support</RTI> 170 onto the outer face of which is attached arm 172. The arm comprises an elongate section 174 attached to the base and undergoes two successive bends so as to produce an arm which <RTI> returns</RTI> towards the base so as to define a central area 176 for holding the cable between the elongate section 174 of the arm 172 <RTI> and</RTI> a <RTI> return</RTI> <RTI> portion</RTI> 180. The inner face of the <RTI> support</RTI> 170 is attached to engagement means 182 for securing the hook to apertures on the <RTI> vertical</RTI> uprights. The engagement means 182 is concave in shape and <RTI> carries</RTI> four spaced <RTI> apart</RTI> studs 184, 186, 187, 188. The spaced studs 184, 186 project outwardly from the engagement means 182 along an axis parallel to elongate section 174 and stud 186 has a deflectable tongue 190, with a step 192 moulded on the outer flank of the tongue. Tongue 186 extends perpendicular to elongate section 174. To facilitate moulding, holes 194 are <RTI> formed</RTI> in the base flange of engagement means 182. Studs 187, 188 project at right angles to an axis parallel to elongate section 174.

When the cable hook 142 or arm 144 is inserted into the elongate struts as shown in Figure 13, the studs 184 are arranged to engage with upper and lower holes in the group of three holes in the first limb, and the studs 186 engage with upper and lower holes in the opposing group on the second limb, and the tongue 190 deflects to form a snap-fit connection into the apertures. Thus the hook is secured at four <RTI> parts</RTI> so that its restraining arm 172 is parallel to the base.

Figure 14 shows a view of a mounting angle with a mixture of square and generally <RTI> cruciform</RTI> apertures 220, 240, 260. <RTI> The</RTI> generally cruciform aperture 240 comprises two intersecting slots 244, 246, the width x of slot 244 being greater than the width y of the slot 246. Width x is typically 9.5 mm, width y is 4.95 mm.

<Desc/Clms Page number 14>

Claims (21)

  1. Claims 1. An enclosure for electrical equipment, the enclosure comprising a base frame and a top frame <RTI> interconnected</RTI> by a plurality of elongate struts, wherein the base frame <RTI> further</RTI> comprises first guide means and the top frame comprises second guide means, such that the elongate <RTI> struts</RTI> engage with the first and second guide means, the <RTI> first</RTI> guide means and the second guide means co-operating to allow relative movement of the elongate struts in two mutually orthogonal directions.
  2. 2. An enclosure according to claim 1, wherein each elongate strut <RTI> further</RTI> comprises mounting means for mounting <RTI> racks</RTI> and other equipment, each mounting means moving with the respective strut.
  3. 3. An enclosure according to claim 2, wherein the mounting means is detachable from the strut.
  4. 4. An enclosure according to any of claims 1 to 3, wherein the first guide means comprises a first pair of support rails which allow movement of struts in a <RTI> primary</RTI> direction along the length of each rail.
  5. 5. An enclosure according to any of the preceding claims, wherein the second guide means comprises a second pair of <RTI> support</RTI> rails which allow movement of struts in the primary direction.
  6. 6. An enclosure according to any of the preceding claims, wherein the <RTI> first</RTI> guide means <RTI> further</RTI> comprises a first lip and a second lip, each <RTI> support</RTI> rail in the first pair of support rails engaging with the <RTI> first</RTI> lip and the second lip, and each <RTI> support</RTI> rail of the first pair being moveable along the lips in a secondary direction defined by the lips, thereby to allow movement of the elongate struts along the secondary direction.
    <Desc/Clms Page number 15>
  7. 7. An enclosure according to claim 5, wherein the second guide means <RTI> further</RTI> comprises a third lip and a fourth lip, each support rail in the second pair of support rails engaging with the third lip and the fourth lip and each <RTI> support</RTI> rail of the second pair being moveable in the secondary direction, thereby to allow movement of the elongate struts along the secondary direction.
  8. 8. An enclosure according to claim 7, wherein the top frame overlies the base frame, so that the first pair of support rails and the second pair of <RTI> support</RTI> rails overlie one another, the first lip overlies the third lip, and the second lip overlies the <RTI> fourth</RTI> lip.
  9. 9. An enclosure according to claim 8, wherein each elongate strut is moveable along both guide rails simultaneously to adjust the position of the <RTI> strut</RTI> in the primary direction.
  10. 10. An enclosure according to any of claims 2 to 9, wherein the support rails have a rectangular cross-section and the elongate struts have an <RTI> inverted</RTI> U-shaped cross-section at their upper and lower ends, so as to form a sliding fit with the <RTI> support</RTI> rails.
  11. 11. An enclosure according to any of the claims 2 to 9, wherein the support rails have a rectangular cross-section and each elongate strut <RTI> further</RTI> comprises a <RTI> first</RTI> foot member fixed to a lower end of the strut, and a second foot member attached to an upper end of the strut, and first and second foot members have an inverted U-shaped cross-section, thereby to form a sliding fit with <RTI> support</RTI> rails.
  12. 12. An enclosure according to any of claims 2 to 11, wherein the mounting means comprises an elongate strip of L-shaped cross-section which provides a first flange for attaching to the <RTI> strut</RTI> and a second flange extending at right angles to the <RTI> strut,</RTI> the second flange comprising a plurality of apertures to which racks and equipment can be secured.
  13. 13. An enclosure according to claim 12, wherein selected apertures are generally <RTI> cruciform</RTI> in shape, having a first slot and a second slot arranged in a cross shape, with the width of the first slot differing from the width of the second slot so that components of two different dimensions can be placed into the aperture.
    <Desc/Clms Page number 16>
  14. 14. An elongate strut for use in an enclosure, wherein the <RTI> strut</RTI> comprises a first hollow elongate member and a second hollow elongate member, such that the first hollow elongate member and the second hollow elongate member are joined together along their length by an elongate sheet.
  15. 15. An elongate strut according to claim 14, wherein the first elongate member and the second elongate member have a generally circular cross-section and are of a first radius, the first radius being equal to or greater than a minimum bend radius for cables, thereby to ensure that cables passed around the strut maintained structural integrity.
  16. 16. An elongate <RTI> strut</RTI> according to claim 14 or 15, wherein the elongate <RTI> strut</RTI> is provided with a plurality of apertures along the length of the elongate sheet, so as to reduce the weight of the strut.
  17. 17. <RTI> An</RTI> elongate strut according to any of claims 14 to 17, wherein the elongate strut has an inverted U-shaped cross-section at its upper and lower ends.
  18. 18. An elongate <RTI> strut</RTI> according to any of claims 14 to 17, wherein the elongate <RTI> strut</RTI> comprises a first foot member fixed to a lower end of the <RTI> strut,</RTI> and a second foot member attached to an upper end of the <RTI> strut,</RTI> wherein the first and second feet members have an inverted U-shaped cross-section and extend beyond the base of the strut.
  19. 19. An elongate <RTI> strut</RTI> according to any of claims 14 to 19, wherein <RTI> further</RTI> apertures are provided in the hollow elongate members of the <RTI> strut</RTI> for securing equipment thereto.
  20. 20. A cable support means comprising a base member having an inner face and an outer face, wherein the inner face <RTI> carries</RTI> engagement means and the outer face comprises a cable holding means, and the engagement means <RTI> forms</RTI> a snap fit connection when pushed into <RTI> apertures</RTI> on an elongate strut.
    <Desc/Clms Page number 17>
  21. 21. An enclosure substantially as herein particularly described with reference to and as illustrated in Figures 1 to 10, 13 to 14. 23. An elongated strut substantially as herein particularly described with reference to and as illustrated in Figures 7 to 10 <RTI> and</RTI> Figures 13 and 14. 24. A cable connector substantially as herein <RTI> particularly</RTI> described with reference to Figures 12 and 13.
GB0115541A 2000-06-26 2001-06-26 Enclosure Active GB2366084B (en)

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DE10311381B3 (en) * 2003-03-11 2004-07-29 Rittal Gmbh & Co. Kg Switch gear housing has a rectangular form having frame with pillars bolted to top and bottom covers that also provide door mounting
EP1644593A1 (en) * 2003-06-23 2006-04-12 Smorgon Steel Litesteel Products Pty Ltd An improved beam
EP1835584A2 (en) * 2006-03-13 2007-09-19 Panduit Corporation Inc. Network cabinet
EP1835585A2 (en) * 2006-03-13 2007-09-19 Panduit Corp. Network cabinet
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US9313927B2 (en) 2010-11-08 2016-04-12 Chatsworth Products, Inc. Header panel assembly for preventing air circulation above electronic equipment enclosure
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Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10311381B3 (en) * 2003-03-11 2004-07-29 Rittal Gmbh & Co. Kg Switch gear housing has a rectangular form having frame with pillars bolted to top and bottom covers that also provide door mounting
EP1644593A4 (en) * 2003-06-23 2007-10-24 Smorgon Steel Litesteel Products Pty Ltd An improved beam
EP1644593A1 (en) * 2003-06-23 2006-04-12 Smorgon Steel Litesteel Products Pty Ltd An improved beam
US8181423B2 (en) 2003-06-23 2012-05-22 Smorgon Steel Litesteel Products Pty Ltd. Beam
US20110162320A1 (en) * 2003-06-23 2011-07-07 Smorgon Steel Litesteel Products Pty Ltd Beam
US7498512B2 (en) 2006-03-13 2009-03-03 Panduit Corp. Network cabinet
EP1835582A3 (en) * 2006-03-13 2007-09-26 Panduit Corp. Network cabinet
EP1835584A3 (en) * 2006-03-13 2007-09-26 Panduit Corporation Inc. Network cabinet
US7476804B2 (en) 2006-03-13 2009-01-13 Panduit Corp. Network cabinet
US7485803B2 (en) 2006-03-13 2009-02-03 Panduit Corp. Network cabinet
US7495169B2 (en) 2006-03-13 2009-02-24 Panduit Corp. Network cabinet
EP1835585A3 (en) * 2006-03-13 2007-09-26 Panduit Corp. Network cabinet
US7718891B2 (en) 2006-03-13 2010-05-18 Panduit Corp. Network cabinet
US7772489B2 (en) 2006-03-13 2010-08-10 Panduit Corp. Network cabinet
US7880084B2 (en) 2006-03-13 2011-02-01 Panduit Corp. Network cabinet
EP1835585A2 (en) * 2006-03-13 2007-09-19 Panduit Corp. Network cabinet
EP1835584A2 (en) * 2006-03-13 2007-09-19 Panduit Corporation Inc. Network cabinet
US8237052B2 (en) 2006-03-13 2012-08-07 Panduit Corp. Network cabinet
CN101039447B (en) 2006-03-13 2013-04-24 泛达公司 Network Cabinets
US8802978B2 (en) 2006-03-13 2014-08-12 Panduit Corp. Network cabinet
US9549482B2 (en) 2014-09-05 2017-01-17 Emerson Network Power, Energy Systems, North America, Inc. Cabinet frame enclosures, frame members and corresponding methods
US9578772B2 (en) 2014-09-05 2017-02-21 Emerson Network Power, Energy Systems, North America, Inc. Cabinet frame enclosures, frame members and corresponding methods
US9622369B2 (en) 2014-09-05 2017-04-11 Emerson Network Power, Energy Systems, North America, Inc. Cabinet frame enclosures, frame members and corresponding methods

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GB0015637D0 (en) 2000-08-16 grant
GB2366084B (en) 2002-09-11 grant

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