Snap together cable trough system

[0002] This invention pertains to a system for the management and routing of cables, such as telecommunications cables. More particularly, this invention pertains to a cable trough member.

[0003] In the telecommunications industry, the use of optical fibers for signal transmission is accelerating. With the increased utilization of optical fiber systems, optical fiber cable management requires industry attention. Similar issues exist with other telecommunications cables such as copper-based cables.

[0004] One area of telecommunications cable management that is necessary is the routing of cables from one piece of equipment to another. For example, in a telecommunications facility, optical fiber cables or other cables may be routed between fiber distribution equipment and optical line terminating equipment. In buildings and other structures which carry such equipment, the cable routing can take place in concealed ceiling areas or in any other manner to route cables from one location to another. Accordingly, such routing systems often include a plurality of trough members, fittings and couplings for routing the cables.

[0005] When routing optical fibers, it is desirable that the routing system will be easy to install. Prior trough systems use coupling members with fasteners such as screws to couple the ends of two trough members. There is a need for devices which make system installation easier and less reliant on additional coupling pieces and fasteners.

[0006] The present invention concerns trough members for use in a trough system. The trough members may be quickly and easily snap-fitted together through the use of a mating arrangement. The trough members include upstanding sidewalls extending from a base defining a generally U-shaped trough. The trough provides a cable pathway for receiving at least one telecommunications cable. A first end of the trough members define a snap-together mating arrangement having male and female coupling members which mate through longitudinal sliding movement of a first trough member relative to a second trough member so that the bases abut each other to form a flush surface.

[0007] In a preferred embodiment of the trough member according to the present invention, the trough member has a two ends which having identical, mirror-image coupling members so that the trough member can be coupled to two identical trough members.

[0008] The present invention also relates to a method for quickly and easily assembling a cable management trough assembly which includes the steps of providing first and second trough members having male and female coupling members at coupling ends of the first and second trough members, aligning the coupling end of the first trough member with the coupling end of the second trough member so that the male members are aligned with openings of the female members, and sliding the first trough member longitudinally relative to the second trough member so that the male members are received in the openings of the female members.

[0009] FIG. 1 is a top perspective view of a trough member according to the present invention having identical ends.

[0010] FIG. 2 is a bottom perspective view of the trough member of FIG. 1.

[0011] FIG. 3 is a bottom view of the trough member of FIG. 1.

[0012] FIG. 4 is an end view of the trough member of FIG. 1.

[0013] FIG. 5 is a side view of the trough member of FIG. 1.

[0014] FIG. 6 is a top perspective view of a cable trough assembly according to the present invention combining two trough members with ends identical to the ends of the trough member of FIG. 1.

[0015] FIG. 7 is a bottom perspective view of the cable trough assembly of FIG. 6.

[0016] FIG. 8 is a bottom view of the cable trough assembly of FIG. 6.

[0017] FIG. 9 is a detail view of the mating arrangement of the trough assembly labeled A in FIG. 8.

[0018] The present invention concerns a cable guide members having ends with a snap-fitting mating arrangement. The guide members, such as troughs, may be used within a cable management system that may include additional horizontal trough members, vertical sections, junctions and couplings. The trough members of the present invention allow two trough members having identical ends to be coupled together without the need for an additional coupling member or a fastener. Instead, the members are coupled by sliding engagement of male and female coupling members to form a mating arrangement. Notably, there is no need to manufacture two separate pieces, one having a male end and one having a female end. The mating ends are identical. The trough members are held together by opposing edges. It is to be understood that “snap-fit” means the two trough members can be coupled by sliding engagement of opposing edges of the trough members to form a mating arrangement without the need for an additional coupling piece, fastener, or tool.

[0019] The preferred embodiment shown in the Figures is a straight trough member. The present invention, however, may be used with cable guide members of any number of different shapes, for example, elbows troughs, tee-troughs, upwardly or downwardly angled troughs, junction troughs, troughs with exits or downspouts, or any other cable guide member. Different cable guide members having identical coupling ends according to the present invention may also be snap-fit together, for instance, a tee-trough member may be coupled to a straight trough member.

[0020] Referring now to FIGS. 1-5, a trough member 10 is shown having ends 12, 14. Trough member 10 includes generally vertical or upright sidewalls 16, 18, and a connecting horizontal base or bottom wall 20. Trough member 10 defines an open top. Together, the base 20 and the sidewalls 16 and 18 define a generally continuous U-shaped cross-section as best shown in FIG. 4. The U-shaped trough defines an interior which provides a cable pathway 24 for receiving one or more telecommunications cables. The pathway 24 is oriented in the longitudinal direction generally parallel to the sidewalls 16 and 18.

[0021] End 12 includes a first set 30 of coupling members 31-35 extending from an outside surface of the base 20. End 14 includes an identical set 30′ of coupling members 31′-35′. As shown in FIGS. 6-8 the first set 30 of coupling members 31-35 snap-fit in a mating arrangement with second set 30′ of coupling members to couple trough members 10 and 100.

[0022] Sets 30 and 30′ of coupling members include first and second male coupling members 31, 34 and 31′, 34′ respectively. Male coupling members are U-shaped brackets. The male coupling members 31, 34 and 31′, 34′ preferably have tapered sides 37 so that the male coupling members narrow toward their extreme ends 38. Coupling members 33, 35 and 33′, 35′ are female coupling members. Female coupling members 33, 35 and 33′, 35′ are also U-shaped brackets. The female coupling members 33, 35 and 33′, 35′ are shaped to define openings 39 for receiving male coupling members sized as male coupling members 31, 34 and 31′, 34′. The male coupling members can be slid in the longitudinal direction to fit inside corresponding female coupling members of another trough member.

[0023] Preferably, trough member 10 includes coupling members that can prevent longitudinal separation once assembled. Coupling member 32 includes a ramped surface 40 with an opposite edge 41. Coupling member 35 includes a ramped surface 42 with an opposite edge 43. As shown in FIG. 9 opposite edges 41 and 43 engage to prevent two coupled trough members from separating. Coupling member 32 may be made flexible to aid in separating two trough members if desired by deflecting the coupling member from engagement with opposite edge 43.

[0024] Trough member 10 includes outwardly extending, L-shaped flanges 44 and 45 along a top portion of each sidewall 16 and 18. At end 12, a tab 48 extends longitudinally from flange 45. Tab 48 includes a ramped surface 50 with an opposite edge 52. Side surface 51 of tab 48 is tapered toward the end of the tab 48 (see FIG. 3). Also at end 12, flange 44 defines an aperture 53 having an edge 54. Edge 54 is oriented to engage a mirror image opposite edge 52′ of tab 48′ on end 14 of an identical trough member.

[0025] As shown in FIGS. 6-9, trough member 10 may be snap-fit to an identical trough member 100 or any other cable guiding member having an end identical to end 12 or 14 of trough member 10. End 14 of trough member 10 is aligned with end 12 of trough member 100 so that male coupling members 31′ and 34′ of trough 10 are received into female coupling members 35 and 33 of trough 100. Similarly, female coupling members 33′ and 35′ of trough 10 receive male coupling members 34 and 31 of trough member 100. Coupling member 32 of trough 100 engages edge 43′ of coupling member 35′. Similarly, coupling member 32′ of trough 10 engages edge 43 of trough 100. The opposing edges prevent the trough members from separating once they are snap-fitted to each other. In addition, tabs 48 and 48′ are received beneath flanges 44′ and 44 respectively so that edges 50 and 50′ engage edges 54′ and 54 respectively to prevent separation of the trough members.

[0026] When trough members 10 and 100 are coupled as an assembly, the base 20 and sidewalls 16 and 18 of trough member 10 form a butt joint with base 120 and sidewalls 116 and 118 of trough member 100. The butt joint of the assembly of trough members is formed by an end-to-end meeting of the respective bases and sidewalls to form a flat, continuous transition between the cable pathway of the trough member 10 to the cable pathway of trough member 100. In other words, the interior surface of base 10 is flush with the interior surface of base 110, forming an unbroken, combined base surface.

[0027] With cable troughs according to the present invention, a cable trough assembly can be assembled by aligning identical ends of two cable trough components so that the male coupling members of the first cable trough are aligned with corresponding female coupling members of the second cable trough. The first cable trough is then slid longitudinally relative to the second cable trough so that the male coupling members are received by the female coupling members until the base of the first trough flush abuts the base of the second trough so that the cable pathway of the first trough member communicates with the cable pathway of the second trough member. Opposing edges snap into engagement with each other once the coupling end of the first cable trough abuts the coupling end of the second cable trough.

[0028] The above specification, and preferred embodiment provide a description of the invention. Various alterations may be made to the preferred embodiment described above which would still fall within the scope of the invention. For instance, the coupling members may be located on the sidewalls instead of the base, or the number, size or configuration of the coupling members may be varied. Since many embodiments of the invention can be made without departing from the spirit and scope of the invention, the invention resides in the claims hereinafter appended.