US20210310199A1 - Rail coupling - Google Patents
Rail coupling Download PDFInfo
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- US20210310199A1 US20210310199A1 US17/264,423 US201917264423A US2021310199A1 US 20210310199 A1 US20210310199 A1 US 20210310199A1 US 201917264423 A US201917264423 A US 201917264423A US 2021310199 A1 US2021310199 A1 US 2021310199A1
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- United States
- Prior art keywords
- rail
- coupling member
- coupling
- running surface
- male
- 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.)
- Pending
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- 238000005859 coupling reaction Methods 0.000 title claims abstract description 299
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- 238000000034 method Methods 0.000 claims description 22
- 238000003466 welding Methods 0.000 claims description 16
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Images
Classifications
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63G—MERRY-GO-ROUNDS; SWINGS; ROCKING-HORSES; CHUTES; SWITCHBACKS; SIMILAR DEVICES FOR PUBLIC AMUSEMENT
- A63G21/00—Chutes; Helter-skelters
- A63G21/20—Slideways with movably suspended cars, or with cars moving on ropes, or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
- B61B3/00—Elevated railway systems with suspended vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
- B61B7/00—Rope railway systems with suspended flexible tracks
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B11/00—Rail joints
- E01B11/02—Dismountable rail joints
- E01B11/04—Flat fishplates
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B25/00—Tracks for special kinds of railways
- E01B25/16—Tracks for aerial rope railways with a stationary rope
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B25/00—Tracks for special kinds of railways
- E01B25/22—Tracks for railways with the vehicle suspended from rigid supporting rails
- E01B25/24—Supporting rails; Auxiliary balancing rails; Supports or connections for rails
Definitions
- the present invention relates to rail couplings for releasably coupling rails and to rail assemblies including rails and such rail couplings.
- a zipline also known as a zip-line, zip wire, aerial runway or aerial ropeslide
- a trolley also known as a bogey
- a user i.e. a load
- suspended from the trolley may be accelerated by gravity from the upper end to the lower end of the inclined cable.
- the pulley rolls along an uppermost portion of the inclined cable.
- a gradient of the inclined cable is typically in a range from 1 in 20 to 1 in 30.
- the inclined cable sags and appropriate tensioning of the inclined cable is required to control acceleration of the user. Since the inclined cable is secured only at the upper and the lower ends thereof, the inclined cable is restricted to a linear path, without lateral deviations, such as curves or bends.
- the cable may be replaced with a rail, typically a monorail.
- the non-linear path enables the rail to curve around obstacles, for example, and/or to increase user enjoyment.
- An uppermost portion of the rail may be fixed to a framework or hung from ceiling joists or trees, for example, such that a region under the rail remains unobstructed for the trolley and the user to travel through. That is, the rail is a suspended rail, situated at a height typically in a range from 2 m to 10 m, above the ground.
- a typical rail includes a tube having an axial (also known as longitudinal) flange, for fixing or hanging, upstanding therefrom.
- the pulley is replaced by one or more freely-rolling wheels, that roll along the rail on an upper lateral portion or portions thereof, clear of the fixed uppermost portion.
- the wheels may roll either side of the axial flange.
- the trolley is arranged to be captive on the rail, such that the trolley (i.e. a captive trolley) remains on the rail, in use.
- Two or more trolleys may be captive on the rail, such that two or more respective users may travel thereon.
- the rail is generally inclined, having a mean gradient typically in a range from 1 in 10 to 1 in 60, though may include one or more descending portions, ascending portions and/or horizontal portions.
- a total length of the rail may be in excess of 500 m, including multiple curves or bends, descending portions, ascending portions and/or horizontal portions.
- An installed rail may be known as a rail track.
- the rail may be a continuous (also known as an endless) rail, forming a closed rail track.
- the rail is provided in lengths (also known as sections), for assembly on site.
- the assembly of the rail typically includes fitting and joining of adjacent lengths, typically by welding. Fitting and/or joining may be complex due, at least in part, to the rail including multiple curves or bends, descending portions, ascending portions and/or horizontal portions. Errors in the assembly, for example faults and/or discontinuities may increase loadings on, and/or rates of wear of, the trolley and/or rail. These errors may adversely affect rail integrity, trolley reliability and/or user safety, for example. Faults, such as cracks, lack of welding penetration, slag lines or undercut, may compromise structural integrity of the rail.
- Discontinuities such as steps or gaps between the adjacent lengths, may increase loading and/or vibration and hence wear and/or fatigue.
- the assembly of the rail may be performed in situ (i.e. at height), since obstructions such as pre-existing structures or trees may prevent assembly of the rail on the ground before subsequent lifting to the height, complicating assembly. Hence, errors may be more prevalent and/or exacerbated for in situ assembly.
- disassembly of the rail for example to replace a damaged length or to resite the rail, may be problematic, for example requiring in situ cutting and subsequent refitting and rejoining of the rail.
- a first aspect provides a releasable rail coupling for releasably coupling a first rail providing a first portion of a running surface for a wheel and a second rail providing a second portion of the running surface, the rail coupling comprising:
- first part having a first end comprising a first male coupling member and a second end arranged for joining to the first rail;
- a second part having a first end comprising a corresponding first female coupling member, arranged to receive the first male coupling member therein, and a second end arranged for joining to the second rail;
- a second aspect provides a rail section providing a portion of a running surface for a wheel, the rail section comprising a rail and a first part and/or a second part of a rail coupling, according to the first aspect, joined thereto.
- a third aspect provides a method of manufacturing a rail section according to the second aspect, the method comprising:
- a fourth aspect provides a rail assembly, or a kit of parts for a rail assembly, comprising a set of rail sections, including a first rail section and a second rail section, according to the second aspect.
- a fifth aspect provides a method of assembling a rail assembly according to the fourth aspect, comprising:
- a rail coupling as set forth in the appended claims.
- a rail section comprising a part of a rail coupling, a method of manufacturing a rail section, a rail assembly and a kit of parts for a rail assembly including a set of rail sections and a method of assembling a rail assembly.
- the first aspect provides a releasable rail coupling for releasably coupling a first rail providing a first portion of a running surface for a wheel and a second rail providing a second portion of the running surface, the rail coupling comprising:
- first part having a first end comprising a first male coupling member and a second end arranged for joining to the first rail;
- a second part having a first end comprising a corresponding first female coupling member, arranged to receive the first male coupling member therein, and a second end arranged for joining to the second rail;
- first rail i.e. a first length of rail
- second rail i.e. a second length of rail
- the rail coupling is a releasable rail coupling, thereby substantially reducing effort and/or force required for coupling the first rail and the second rail, for example during assembly on site.
- the assembly of a rail may be provided by coupling such rail couplings provided between successive lengths of rail, for example on site, including in situ. That is, conventional fitting and/or welding may be avoided and/or eliminated.
- the disassembly of the rail for example to replace a damaged length or to resite the rail, is improved, for example without requiring in situ cutting and subsequent refitting and rejoining of the rail.
- the rail coupling maintains and/or enhances user safety since structural integrity may be maintained, even during significant deformation, as described below in more detail.
- grub screw retention of the rail coupling on the first rail and/or the second rail is not required, facilitating assembly and disassembly while also eliminating a maintenance requirement arising from such grub screws.
- grub screws may vibrate loose in use, compromising safety and hence requiring frequent maintenance to check and/or re-tighten.
- the releasable rail coupling is for releasably coupling a first rail providing a first portion of a running surface for a wheel and a second rail providing a second portion of the running surface.
- the rail coupling is a releasable rail coupling, which may be coupled and uncoupled, for example repeatedly. That is, the first rail and the second rail may be mutually attached and subsequently detached using the rail coupling.
- the rail coupling is for releasably coupling the first rail and the second rail. That is, the rail coupling forms a part of a rail assembly, provided by coupling the first rail and the second rail via the rail coupling, and hence contributes to a structural integrity of the rail assembly.
- the rail assembly may be subject to forces, for example due a weight thereof, residual stresses therein, fixing thereof as described above, a trolley running thereon and/or a load, for example a user, suspended therefrom.
- the rail coupling is for structurally, for example rigidly c.f. flexibly, and releasably coupling the first rail and the second rail.
- the first male coupling member and the first female coupling member arranged in the second configuration, effectively transfer the forces between the first rail and the second rail.
- the load comprises and/or is a user, having a mass in a range from 30 kg to 120 kg and hence a weight in a range from 294 N to 1,177 N.
- centripetal forces due to cornering may add up to 1.5 g horizontally (i.e. up to 441 N to 1,766 N).
- an increased vertical load due to down swing may add up to 0.6 g vertically (i.e. up to i.e. up to 176 N to 706 N) with no horizontal component.
- the user may be attached to the attachment member via a harness (also known as a suspension harness), for example.
- the harness may be include a dorsal D-ring, for example, for attaching to the attachment member via a sling or lanyard.
- a dorsal D-ring for example, for attaching to the attachment member via a sling or lanyard.
- the user may be suspended in a hang glider-type (also known as a superman) position (i.e. prone or face down).
- the trolley may include a handle, for the user to hold when in such a prone or face-down position.
- the load results in (i.e. gives rise to) a downwards vertical force due to gravity, which may be imposed, at least in part, on the rail via the trolley.
- the load may result in (i.e. give rise to) other forces, for example due to pitching, yawing and/or rolling of the load and/or due to centripetal forces on the load, as described below, that maybe imposed on the trolley and/or on the rail via the trolley.
- the rail is generally inclined, having a mean gradient typically in a range from 1 in 10 to 1 in 60, though may include one or more descending portions, ascending portions and/or horizontal portions.
- a rail may include an initial length having a mean gradient of about 1 in 13 (to accelerate the trolley initially), followed by an intermediate length having a mean gradient of about 1 in 25 (corresponding approximately with constant speed of the trolley) and a final length having a mean gradient of about 1 in 50 (to decelerate the trolley).
- the first rail provides the first portion of the running surface for the wheel, for example of a trolley
- the second rail provides the second portion of the running surface.
- the running surface is a surface for the wheel to run, for example roll, thereon.
- the running surface is a continuous running surface, having no, or substantially free from, discontinuities therein, for example no protrusions (i.e. convexities) thereon or depressions (i.e. concavities) therein. As described above, discontinuities may increase loading and/or vibration and hence wear and/or fatigue.
- a discontinuity in the running surface, measured normal and/or parallel thereto, between the first rail section and the second rail section is at most 1 mm, preferably at most 0.5 mm.
- the running surface comprises a planar running surface and/or a non-planar running surface, for example a concave running surface or a convex running surface.
- the rail coupling comprises the first part and the second part. It should be understood that the first part and the second part are separable parts i.e. not integrally formed or permanently coupled, for example.
- the rail coupling comprises the first part having the first end comprising the first male coupling member and the second end arranged for joining to the first rail.
- first end of the first part and the second end of the first part are respective opposed ends of the first part.
- first male coupling member is arranged to be received in the corresponding first female coupling member. That is, the first male coupling member and the corresponding first female coupling member are arranged thus by configuration and/or adaption, for example shaping. In one example, the first male coupling member and the corresponding first female coupling member have corresponding shapes, for example a plug and a socket respectively.
- the second end of the first part is suitable for joining, for example permanently joining such as by welding or non-permanently such as by adhesion or an interference fit, to the first rail, thereby structurally, securely and/or rigidly joining the first part and the first rail.
- non-permanently joining methods may not be releasable and/or may result in damage during release and/or may preclude rejoining.
- the first male coupling member comprises a protrusion, for example a plug.
- the first male coupling member comprises a circular external cross-sectional shape.
- the first male coupling member comprises a cylindrical external shape or a frustoconical external shape.
- the first male coupling member may be provided, for example machined such as turned, to a high tolerance and/or surface finish. In this way, relative transverse movement between the first male coupling member and the first female coupling member is reduced, reducing discontinuities therebetween and/or wear due to movement, in use.
- an external diameter D m1,ext of the first male coupling member is provided, for example machined such as turned, to a tolerance within a range from ⁇ 0.05 mm to +0.00 mm, preferably within a range from ⁇ 0.02 mm to +0.00 mm, more preferably within a range from ⁇ 0.01 mm to +0.00 mm of a first coupling member diameter D.
- a ratio of a length of the first male coupling member to a cross-sectional dimension, for example a diameter or a width, thereof, is in a range from 0.5:1 to 5:1, preferably in a range from 1:1 to 3:1, more preferably in a range from 1.5:1 to 2.5:1.
- an amount of the male member received by the female member is relatively large, such that removal therefrom is requires correspondingly relatively large movement, thereby reducing likelihood of failure, in use, by uncoupling due to abnormal loading, for example, and/or better resisting large plastic deformation of the first rail and/or the second without catastrophic failure of the rail coupling and/or the rail.
- the rail coupling comprises the second part having the first end comprising the corresponding first female coupling member, arranged to receive the first male coupling member therein, and the second end arranged for joining to the second rail.
- the second part may be as described with respect to the first part, mutatis mutandis.
- first end of the second part and the second end of the second part are respective opposed ends of the second part.
- the first female coupling member is arranged to receive the corresponding first male coupling member. That is, the first male coupling member and the corresponding first female coupling member are arranged thus by configuration and/or adaption, for example shaping. In one example, the first male coupling member and the corresponding first female coupling member have corresponding shapes, for example a plug and a socket respectively.
- the second end of the second part is suitable for joining, for example permanently joining such as by welding or non-permanently such as by adhesion or an interference fit, to the second rail, thereby structurally, securely and/or rigidly joining the second part and the second rail.
- non-permanently joining methods may not be releasable and/or may result in damage during release and/or may preclude rejoining. In other words, non-permanent joining is not necessarily releasable coupling, as described herein.
- the first female coupling member comprises a concavity, for example a socket.
- the first female coupling member comprises a circular internal cross-sectional shape i.e. a circular bore.
- the first female coupling member comprises a cylindrical internal shape or a frustoconical internal shape.
- the first female coupling member may be provided, for example machined such as turned, to a high tolerance and/or surface finish. In this way, relative transverse movement between the first male coupling member and the first female coupling member is reduced, reducing discontinuities therebetween and/or wear due to movement, in use.
- an internal diameter D f1,int of the first female coupling member is provided, for example machined such as turned, bored or drilled, to a tolerance within a range from ⁇ 0.00 mm to +0.05 mm, preferably within a range from ⁇ 0.00 mm to +0.02 mm, more preferably within a range from 0.00 mm to +0.01 mm of the first coupling member diameter D.
- the first male coupling member is received closely (i.e. close fitting) in the first female coupling member, whereby a gap therebetween is as determined by the tolerances.
- a such a machined-to-machined releasably coupling effectively transfers load therethrough between adjacent rails.
- a ratio of a length of the first female coupling member to a cross-sectional dimension, for example a diameter or a width, thereof, is in a range from 0.5:1 to 5:1, preferably in a range from 1:1 to 3:1, more preferably in a range from 1.5:1 to 2.5:1.
- an amount of the male member received by the female member is relatively large, such that removal therefrom is requires correspondingly relatively large movement, thereby reducing likelihood of failure, in use, by uncoupling due to abnormal loading, for example, and/or better resisting large plastic deformation of the first rail and/or the second without catastrophic failure of the rail coupling and/or the rail.
- the first female coupling member is arranged to slidably receive, for example axially, the first male coupling member therein. In this way, coupling and uncoupling is facilitated.
- first male coupling member and the first female coupling member are arranged to interlock, for example, upon fully receiving the first male coupling member in the first female coupling member. In this way, inadvertent or accidental uncoupling may be prevented.
- first male coupling member and the first female coupling member are correspondingly threaded. In this way, load transfer between the first part and the second part may be improved.
- the rail coupling is arrangeable in the first configuration wherein the first male coupling member and the first female coupling member are uncoupled. That is, the first configuration is a disassembled configuration, for example, in which the first male coupling member and the first female coupling member are separate, for example spaced apart, such as by a gap.
- the rail coupling is arrangeable in the second configuration wherein the first male coupling member and the first female coupling member are coupled by receiving the first male coupling member in the first female coupling member. That is, the second configuration is an assembled configuration, for example an in use configuration.
- the rail coupling provides a third portion of the running surface in the second configuration.
- the first rail provides the first portion of the running surface for the wheel, for example of a trolley, and the second rail providing the second portion of the running surface.
- the running surface is a surface for the wheel to run, for example roll, thereon.
- the running surface is a continuous running surface, having no, or substantially free from, discontinuities therein, for example no protrusions (i.e. convexities) thereon or depressions (i.e. concavities) therein.
- discontinuities may increase loading and/or vibration and hence wear and/or fatigue.
- the running surface comprises a planar running surface and/or a non-planar running surface, for example a concave running surface or a convex running surface.
- the third portion of the running surface is thus arranged between the first portion and the second portion. That is, the wheel runs on respective portions of the running surface provided successively by the first rail, the rail coupling and the second rail.
- two interfaces i.e. between the first rail and the rail coupling and between the rail coupling and the second rail
- discontinuities (particularly steps) otherwise arising at the single interface due to relatively poorer tolerancing and/misshaping of the first rail and the second rail may be averaged due to relatively tighter tolerancing of the rail coupling, for example, thereby providing a more continuous running surface.
- the first end of the second part provides, at least in part, the third portion of the running surface. That is, the first female coupling member and the, at least in part, the third portion of the running surface are both at the first end. In one example, an external surface of the first female coupling member provides, at least in part, the third portion of the running surface.
- the first part provides, at least in part, the third portion of the running surface.
- a surface of the first part proximal to the second end provides, at least in part, the third portion of the running surface.
- the second end of the first part comprises a second male coupling and a surface of the first part between the first end and the second end provides, at least in part, the third portion of the running surface.
- the first part provides, at least in part, the third portion of the running surface and the first end of the second part provides, at least in part, the third portion of the running surface. In one example, the first part and the second part provide similar or equal parts of the third portion of the running surface.
- the running surface comprises a cylindrical running surface or a part thereof, for example as provided by a tube or a half round section.
- the first rail comprises a first tube having an external diameter D ext , whereby the first portion of the running surface comprises a first portion of a cylindrical running surface, the second rail comprises a second tube having a diameter D ext (i.e. the same diameter as the first tube, at least nominally), whereby the second portion of the running surface comprises a second portion of the cylindrical running surface and the rail coupling comprises a cylindrical region or part thereof having a diameter D ext (i.e. the same diameter as the first tube and the second tube, at least nominally), whereby the third portion of the running surface comprises a third portion of the cylindrical running surface.
- the first male coupling member and/or the first female coupling member comprises a relief region, arranged to facilitate moving the rail coupling between the first configuration and the second configuration. In this way, moving the rail coupling from the first configuration to the second configuration is facilitated because mutual alignment of the first male coupling member and the first female coupling member is relaxed.
- insertion may be initially off axis and guided to coaxial full insertion.
- the first male coupling member comprises a plug comprising a relief region provided in an intermediate region thereof, for example having a relatively smaller diameter than adjacent regions thereto.
- the first female coupling member comprises a socket comprising a relief region provided in an intermediate region thereof, for example having a relatively larger diameter than adjacent regions thereto.
- the second end of the first part is arranged for joining, for example by welding, to an end of the first rail and/or the second end of the second part is arranged for joining to an end of the second rail.
- the second end of the first part comprises a second male coupling and/or a second female coupling member for joining to the first rail. In one example, the second end of the second part comprises a second male coupling and/or a second female coupling member for joining to the first rail.
- the first rail comprises a first tube having an internal diameter D int
- the second rail comprises a second tube having an internal diameter D int (i.e. the same internal diameter as the first tube, at least nominally)
- the second end of the first part comprises a second male coupling having an external diameter D m2,ext where D m2,ext is compatible with D int
- the second end of the second part comprises a second male coupling having an external diameter D m2,ext where D m2,ext is compatible with D int .
- D m2,ext is compatible with D int means that D m2,ext is at most D int .
- an external diameter D m2,ext of the second male coupling member is provided, for example machined such as turned, to a diameter within a range from ⁇ 2.00 mm to ⁇ 0.25 mm, preferably within a range from ⁇ 1.50 mm to ⁇ 0.50 mm, more preferably within a range from ⁇ 1.00 mm to ⁇ 0.75 mm with respect to D int .
- a diameter within a range from ⁇ 2.00 mm to ⁇ 0.25 mm preferably within a range from ⁇ 1.50 mm to ⁇ 0.50 mm, more preferably within a range from ⁇ 1.00 mm to ⁇ 0.75 mm with respect to D int .
- the relatively looser fit between the second male coupling and the first rail is afforded since the first part and the first rail are joined permanently such as by welding or non-permanently such as by adhesion, thereby structurally, securely and/or rigidly joining the first part and the first rail.
- the rail coupling is formed from steel according to EN 10025: part 2: 2004 grade S185, S235, S275, S355 or equivalent.
- the rail coupling is coated, for example powder coated, painted and/or galvanized, to improve corrosion resistance.
- the rail coupling comprises a third part, for example a set of fishplates including a first fishplate, for attaching to the first rail and the second rail.
- the first rail and the second rail may be mutually aligned.
- the first fish plate comprises a set of perforations therethrough for mechanically attaching, for example using mechanical fasteners such as dowels and/or threaded fasteners, to one side of respective flanges of the first rail and the second rail via a set of congruent perforations included in the respective flanges at adjacent ends of the first rail and the second rail.
- the set of fishplates includes the first fishplate and a second fishplate, comprising respective set of perforations therethrough, for mechanically attaching, for example using threaded fasteners, to both sides of respective flanges of the first rail and the second rail via a set of congruent perforations included in the respective flanges at adjacent ends of the first rail and the second rail.
- the perforations are closely toleranced, for example in a range from +0.10 to +0.20 with respect to the mechanical fasteners, for example a shank thereof.
- the perforations may have a diameter of 14.00 mm for M14 bolts having a shank diameter of 13.80 mm or a diameter of 12.00 mm for M12 bolts having a shank diameter of 11.80 mm.
- the first male coupling member and the first female coupling member (hence the first part and the second part), arranged in the second configuration, effectively transfer the forces between the first rail and the second rail.
- the third part transfers only a relatively small proportion of the forces between the first rail and the second rail, such that imposed forces on the mechanical fasteners therethrough are relatively low.
- the rail comprises a planar (i.e. a flat) running surface, for example provided by a square or rectangular bar or hollow section and/or by an equal or unequal angle section.
- the rail comprises a non-planar, for example a convex or a concave running surface.
- the rail comprises a cylindrical (i.e. a convex) running surface defining a cylinder axis, wherein the line is substantially coincident, in use, with the cylinder axis, for example provided by a tube (i.e. a section) having a circular cross-section or a part thereof, such as a U shape channel. Hollow section is preferred, reducing a weight of the rail.
- the tube has an external diameter D ext in a range from 40 mm to 100 mm, preferably in a range from 50 mm to 75 mm, for example 60.3 mm.
- the tube has a wall thickness in a range from 1 mm to 6 mm, preferably in a range from 2 mm to 5 mm, for example 3 mm or 4 mm, for example 3.2 mm.
- the tube has an internal diameter D int in a range from 35 mm to 95 mm, preferably in a range from 45 mm to 70 mm.
- the rail comprises a non-linear, for example a curved, portion.
- the non-linear portion enables the rail to curve around obstacles, for example, and/or to increase user enjoyment, as described above.
- the non-linear portion is generally sideways (i.e. transverse to a general direction of travel of a trolley), though the rail may curve sideways and up or down also.
- the rail comprises two or more rails, for example two parallel rails.
- the rail is a monorail (i.e. a single rail).
- a monorail is preferred, reducing cost and/or weight, may be fixed readily to a framework or hung from ceiling joists or trees, for example, and/or may be formed into relatively complex shapes, including multiple non-linear and linear portions that may also ascend, descend and/or be horizontal.
- the rail is formed from steel according to EN 10025: part 2: 2004 grade S185, S235, S275, S355 or equivalent.
- the tube is seamless tube.
- the rail is coated, for example powder coated, painted and/or galvanized, to improve corrosion resistance.
- the rail comprises a flange.
- the flange also known as a web or a stiffener
- the rail comprises a cylindrical tube, wherein the running surface comprises a cylindrical running surface or a part thereof and wherein the rail comprises a flange.
- relatively complex non-linear paths may be provided, including lateral deviations, such as curves or bends, and/or one or more descending portions, ascending portions and/or horizontal portions, for example by forming, such as bending or rolling the tube.
- lateral deviations such as curves or bends
- descending portions ascending portions and/or horizontal portions
- horizontal portions for example by forming, such as bending or rolling the tube.
- a transverse curvature of the running surface is relatively invariant, including for relatively complex non-linear paths, thereby providing a more continuous running surface.
- the flange is arranged upstanding from the tube i.e. extending away therefrom. In one example, the flange is arranged longitudinally with respect to the tube. In one example, the flange is oriented normally to the running surface. In one example, the rail comprises a longitudinal flange. In one example, the flange is arranged to provide a fixing means, for example a lifting eye or a perforation or a set thereof through the flange, for suspension of the rail therefrom. Other fixing means are known. In this way, the rail may be fixed to, for example suspended from, a framework or hung from ceiling joists or trees, for example, such that a region under the rail remains unobstructed for the trolley and the user to travel through.
- the longitudinal flange comprises a first set of perforations for suspension. In one example, the longitudinal flange comprises a second set of perforations, congruent with a set of perforations provided in a third part of the rail coupling. In one example, the longitudinal flange extends continuously along a length of the rail. In one example, the flange is welded to the tube, for example continuously or intermittently (i.e. stitch welding, for example on alternate sides of the flange).
- the rail comprises a cylindrical tube, wherein the running surface comprises a cylindrical running surface or a part thereof and wherein the rail comprises a longitudinal flange normal to the tube (i.e. upstanding therefrom) extending continuously along the tube.
- a length of the flange is greater than a length of the tube.
- the flange may extend beyond one or both ends of the tube.
- the flange extends beyond both ends of the tube, by distances correlating or coinciding (i.e. equal to or substantially equal to) respective lengths, or parts thereof, of the third portion of the running surface provided by the first part and/or the second part of the rail coupling joined thereto. In this way, the respective ends of flanges of adjacent rails abut or confront when the rail coupling is arranged in the second configuration.
- a second aspect provides a rail section providing a portion of a running surface for a wheel, the rail section comprising a rail and a first part and/or a second part of a rail coupling, according to the first aspect, joined thereto.
- the running surface and/or the rail may be as described with respect to the first aspect.
- the rail may be as described with respect to the first rail or the second rail of the first aspect.
- the rail comprises a cylindrical tube, wherein the running surface comprises a cylindrical running surface or a part thereof and wherein the rail comprises a flange.
- relatively complex non-linear paths may be provided, including lateral deviations, such as curves or bends, and/or one or more descending portions, ascending portions and/or horizontal portions, for example by forming, such as bending or rolling the tube.
- lateral deviations such as curves or bends
- descending portions ascending portions and/or horizontal portions
- horizontal portions for example by forming, such as bending or rolling the tube.
- a transverse curvature of the running surface is relatively invariant, including for relatively complex non-linear paths, thereby providing a more continuous running surface.
- the rail is provided in lengths that are coupled end to end, for example on site.
- a third aspect provides a method of manufacturing a rail section according to the second aspect, the method comprising:
- the method comprises providing the rail by joining, by welding for example stitch welding, a flange to a tube, thereby providing the rail.
- the method comprises forming, for example by bending and/or rolling, the tube/or and the flange, thereby forming a curve therein, preferably before joining the flange to the tube.
- a length of the flange is greater than a length of the tube and the method comprises arranging the flange to extend beyond one or both ends of the tube, before joining the flange to the tube.
- the method comprises arranging the first part and/or the second part whereby respective lengths, or parts thereof, of the third portion of the running surface provided by the first part and/or the second part of the rail coupling correlate or coincide (i.e. equal to or substantially equal to) respective lengths, or parts thereof, of the flange extending beyond one or both ends of the tube. In this way, the respective ends of flanges of adjacent rails abut or confront when the rail coupling is arranged in the second configuration.
- a fourth aspect provides a rail assembly (also known as a rail track), or a kit of parts for a rail assembly, comprising a set of rail sections, including a first rail section and a second rail section, according to the second aspect.
- a rail assembly also known as a rail track
- kit of parts for a rail assembly comprising a set of rail sections, including a first rail section and a second rail section, according to the second aspect.
- the rail assembly comprises a set of M rail sections, wherein M is a natural number greater than 2, 5, 10, 20, 30, 40, 50, 100, or more. In this way, a rail track may be conveniently provided.
- each rail section has a length in a range from 1 m to 40 m, preferably in a range from 2 m to 30 m, more preferably in a range from 5 m to 20 m, for example 9 m, 10 m, or 12 m.
- a fifth aspect provides a method of assembling a rail assembly according to the fourth aspect, comprising:
- the method comprises disassembling the rail assembly by moving the rail coupling from the second configuration to the first configuration.
- a trolley for a rail comprising:
- a set of wheels including a first wheel and a second wheel, rotatably coupled to the frame;
- an attachment member coupled to the frame, for attachment, preferably suspension, of a load therefrom, in use;
- first wheel is rotatable in a first plane about a first axis and the second wheel is rotatable in a second plane about a second axis;
- first plane and the second plane define a line
- trolley is arrangeable in:
- the attachment member is arranged at a second angular displacement about the line, wherein the first angular displacement and the second angular displacement are different.
- the term “comprising” or “comprises” means including the component(s), unit(s), module(s), feature(s) or integer(s) specified but not to the exclusion of the presence of other components, units, modules, features or integers.
- FIG. 1 schematically depicts an exploded plan view of a rail assembly according to an exemplary embodiment, including a rail coupling according to an exemplary embodiment arranged in a first configuration;
- FIG. 2 schematically depicts plan view of the rail assembly of FIG. 1 , including the rail coupling arranged in a second configuration;
- FIG. 3 schematically depicts a longitudinal cross-sectional view of the rail coupling of FIG. 2 ;
- FIG. 4 schematically depicts a longitudinal cross-sectional view of the rail coupling of FIG. 3 , in more detail;
- FIG. 5 schematically depicts a perspective view of a first part of the rail coupling of FIG. 1 ;
- FIG. 6 schematically depicts a perspective view of a second part of the rail coupling of FIG. 1 ;
- FIG. 7 schematically depicts (A) a front elevation view; (B) a side elevation view; and (C) an rear elevation view of the first part of the rail coupling of FIG. 5 ;
- FIG. 8 schematically depicts (A) a front elevation view; (B) a side elevation view; (C) an rear elevation view; and (D) a longitudinal cross-sectional view of the second part of the rail coupling of FIG. 6 ;
- FIG. 9 schematically depicts (A) a plan view; (B) a side elevation view; and (C) a front elevation view of a rail of the rail assembly of FIG. 1 ;
- FIG. 10 schematically depicts (A) a perspective view; (B) a side elevation view; and (C) a front elevation view of a third part of the rail assembly of FIG. 1 ;
- FIG. 11 schematically depicts a perspective view of the rail assembly of FIG. 1 , including a trolley thereon.
- FIG. 1 schematically depicts an exploded plan view of a rail assembly 1 according to an exemplary embodiment, including a rail coupling 1000 according to an exemplary embodiment arranged in a first configuration.
- FIG. 2 schematically depicts plan view of the rail assembly 1 of FIG. 1 , including the rail coupling 1000 arranged in a second configuration.
- FIG. 3 schematically depicts a longitudinal cross-sectional view of the rail coupling 1000 of FIG. 2 .
- FIG. 4 schematically depicts a longitudinal cross-sectional view of the rail coupling 1000 of FIG. 3 , in more detail.
- the releasable rail coupling 1000 is for releasably coupling a first rail 10 A providing a first portion P 1 of a running surface RS for a wheel 120 and a second rail 10 B providing a second portion P 2 of the running surface RS.
- the rail coupling 1000 comprises a first part 1100 having a first end 1110 comprising a first male coupling member 1111 and a second end 1120 arranged for joining to the first rail 10 A.
- the rail coupling 1000 comprises a second part 1200 having a first end 1210 comprising a corresponding first female coupling member 1212 , arranged to receive the first male coupling member 1111 therein, and a second end 1220 arranged for joining to the second rail 10 B.
- the rail coupling 1000 is arrangeable in a first configuration wherein the first male coupling member 1111 and the first female coupling member 1212 are uncoupled.
- the rail coupling 1000 is arrangeable a second configuration wherein the first male coupling member 1111 and the first female coupling member 1212 are coupled by receiving the first male coupling member 1111 in the first female coupling member 1212 .
- the rail coupling 1000 provides a third portion P 3 of the running surface RS in the second configuration.
- first rail 10 A i.e. a first length of rail
- second rail 10 B i.e. a second length of rail
- FIG. 5 schematically depicts a perspective view of the first part 1100 of the rail coupling 1000 of FIG. 1 .
- FIG. 6 schematically depicts a perspective view of the second part 1200 of the rail coupling 1000 of FIG. 1 .
- FIG. 7 schematically depicts (A) a front elevation view; (B) a side elevation view; and (C) an rear elevation view of the first part 1100 of the rail coupling 1000 of FIG. 5 .
- FIG. 8 schematically depicts (A) a front elevation view; (B) a side elevation view; (C) an rear elevation view; and (D) a longitudinal cross-sectional view of the second part 1200 of the rail coupling 1000 of FIG. 6 .
- first male coupling member 1111 and the corresponding first female coupling member 1212 have corresponding shapes, particularly a plug and a socket respectively.
- the first male coupling member 1111 comprises a cylindrical external shape i.e. a plug.
- an external diameter D m1,ext of the first male coupling member 1111 is turned to a tolerance within a range from ⁇ 0.02 mm to +0.00 mm of a first coupling member diameter D of 51.00 mm.
- a ratio of a length L m1 of the first male coupling member 1111 to the external diameter D m1,ext thereof is about 2.4:1.
- the second part 1200 is as described with respect to the first part 1100 , mutatis mutandis.
- the first female coupling member 1212 comprises a cylindrical internal shape.
- an internal diameter D f1,int of the first female coupling member 1212 is bored to a tolerance within a range from ⁇ 0.00 mm to +0.02 mm of the first coupling member diameter D of 51.00 mm.
- a ratio of a length L f1 of the first female coupling member 1212 to the internal diameter D f1,int thereof is about 2.5:1.
- the first female coupling member 1212 is arranged to slidably receive, axially, the first male coupling member 1111 therein.
- the running surface RS is a continuous running surface RS, having no, or substantially free from, discontinuities therein, for example no protrusions (i.e. convexities) thereon or depressions (i.e. concavities) therein.
- the running surface RS comprises a convex, particularly a cylindrical, running surface RS.
- the first part 1100 provides, at least in part, the third portion P 3 of the running surface RS and the first end 1110 of the second part 1200 provides, at least in part, the third portion P 3 of the running surface RS.
- the first part 1100 and the second part 1200 provide similar or equal parts of the third portion P 3 of the running surface RS.
- an external surface of the first female coupling member 1212 provides, at least in part, the third portion P 3 of the running surface RS.
- the running surface RS comprises a cylindrical running surface RS or a part thereof, for example as provided by a tube 11 .
- the first rail 10 A comprises a first tube 11 having an external diameter D ext of 60.3 mm, whereby the first portion P 1 of the running surface RS comprises a first portion P 1 of a cylindrical running surface RS, the second rail 10 B comprises a second tube 11 having a diameter D ext (i.e. the same diameter as the first tube 11 , at least nominally), whereby the second portion P 2 of the running surface RS comprises a second portion P 2 of the cylindrical running surface RS and the rail coupling 1000 comprises a cylindrical region or part thereof having a diameter D ext (i.e. the same diameter as the first tube 11 and the second tube 11 , at least nominally), whereby the third portion P 3 of the running surface RS comprises a third portion P 3 of the cylindrical running surface RS.
- the first female coupling member 1212 comprises a socket comprising a relief region 1213 provided in an intermediate region thereof, having a relatively larger diameter than adjacent regions thereto.
- an internal diameter D f1,rr of the relief region 1213 of the first female coupling member 1212 is bored to within a range from +2.00 mm to +2.50 mm of the internal diameter D f1,int .
- the second end 1120 of the first part 1100 comprises a second male coupling 1121 for joining to the first rail 10 A.
- the second end 1220 of the second part 1200 comprises a second male coupling 1221 for joining to the second rail 10 B.
- the first rail 10 A comprises a first tube 11 A having an internal diameter D int of 53.9 mm
- the second rail 10 B comprises a second tube 11 B having an internal diameter D int (i.e. the same internal diameter as the first tube 11 A, at least nominally)
- the second end 1120 of the first part 1100 comprises a second male coupling 1121 having an external diameter D m2,ext where D m2,ext is compatible with D int
- the second end 1120 of the second part 1200 comprises a second male coupling 1221 having an external diameter D m2,ext where D m2,ext is compatible with D int .
- D m2,ext is compatible with D int means that D m2,ext is at most D int .
- an external diameter D m2,ext of the second male coupling member 1121 is turned to within a range from ⁇ 1.00 mm to ⁇ 0.75 mm with respect to D int . In this way, insertion of the second male coupling 1121 into the first rail 10 A, for example, is facilitated.
- the rail coupling 1000 is formed from steel according to EN 10025: part 2: 2004 grade S355. In this example, the rail coupling 1000 is powder coated.
- FIG. 10 schematically depicts (A) a perspective view; (B) a side elevation view; and (C) a front elevation view of a third part 1300 of the rail assembly 1 of FIG. 1 .
- the rail coupling 1000 comprises a third part 1300 , particularly a set of fishplates, for attaching to the first rail 10 A and the second rail 10 B, particularly to respective flanges thereof.
- the first rail 10 A and the second rail 10 B may be mutually aligned.
- the first fish plate 1300 comprises a set of perforations 1303 therethrough for mechanically attaching, for example using mechanical fasteners such as dowels and/or threaded fasteners, to one side of respective flanges 12 A, 12 B of the first rail 10 A and the second rail 10 B via the set of congruent perforations 13 included in the respective flanges 12 A, 12 B at adjacent ends of the first rail and the second rail.
- the set of fishplates includes the first fishplate and a second fishplate, comprising respective set of perforations therethrough, for mechanically attaching, for example using threaded fasteners, to both sides of respective flanges of the first rail and the second rail via a set of congruent perforations included in the respective flanges at adjacent ends of the first rail and the second rail.
- the perforations are closely toleranced, for example in a range from +0.10 to +0.20 with respect to the mechanical fasteners, for example a shank thereof.
- the perforations may have a diameter of 14.00 mm for M14 bolts having a shank diameter of 13.80 mm or a diameter of 12.00 mm for M12 bolts having a shank diameter of 11.80 mm.
- FIG. 9 schematically depicts (A) a plan view; (B) a side elevation view; and (C) a front elevation view of the rail 10 of the rail assembly 1 of FIG. 1 .
- the rail 10 (i.e. the first rail 10 A and/or the second rail 10 B) comprises a cylindrical (i.e. a convex) running surface RS.
- the rail comprises a cylindrical tube 11 , wherein the running surface RS comprises a cylindrical running surface RS or a part thereof and wherein the rail comprises a flange 12 .
- the tube 11 has an external diameter D ext of 60.3 mm.
- the tube 11 has a wall thickness of 3.2 mm.
- the tube 11 has an internal diameter D int of 53.9 mm.
- the rail 10 is a monorail (i.e. a single rail).
- the rail 10 is formed from steel according to EN 10025: part 2: 2004 grade S275 or equivalent.
- the tube 11 is seamless tube 11 .
- the rail 10 is powder coated.
- the flange 12 having a thickness of 12 mm and a height of 100 mm, is arranged upstanding from the tube 11 i.e. extending away therefrom.
- the flange 12 is arranged longitudinally with respect to the tube 11 .
- the flange 12 is oriented normally to the running surface RS.
- the rail comprises a longitudinal flange 12 .
- the flange 12 is arranged to provide a fixing means, particularly a first set of four perforations 13 through the flange 12 .
- the longitudinal flange 12 comprises a second set of four perforations through the flange 12 .
- the longitudinal flange 12 extends continuously along a length of the rail.
- the flange 12 is welded to the tube 11 , for example continuously or intermittently (i.e. stitch welding, for example on alternate sides of the flange 12 ).
- a length of the flange 12 is greater than a length of the tube 11 .
- the flange 12 extends beyond both ends of the tube 11 , by distances correlating or coinciding (i.e. equal to or substantially equal to) respective lengths, or parts thereof, of the third portion P 3 of the running surface RS provided by the first part 1100 and/or the second part 1200 of the rail coupling 1000 joined thereto.
- FIG. 11 schematically depicts a perspective view of the rail assembly 1 of FIG. 1 , including a trolley 100 thereon.
- the trolley 100 comprises a frame 110 ; a set of wheels 120 , including the first wheel 110 A and a second wheel 120 B, rotatably coupled to the frame 110 ; and an attachment member (not shown), coupled to the frame 110 , for attachment, preferably suspension, of the load L therefrom, in use.
- the first wheel 110 A is rotatable in a first plane about a first axis and the second wheel is rotatable in a second plane about a second axis.
- the first plane and the second plane define a line.
- the trolley 100 is arrangeable in: a first configuration, wherein the attachment member (not shown) is arranged at a first angular displacement about the line; and
- the attachment member (not shown) is arranged at a second angular displacement about the line, wherein the first angular displacement and the second angular displacement are different.
- the trolley 100 is a captive trolley 100 , as described above.
- the set of wheels 120 are arranged to retain the trolley 100 on a rail.
- a releasable rail coupling comprising a part of a rail coupling, a method of manufacturing a rail section, a rail assembly and a kit of parts for a rail assembly including a set of rail sections and a method of assembling a rail assembly are provided.
- the releasable rail coupling is for releasably coupling a first rail providing a first portion of a running surface for a wheel and a second rail providing a second portion of the running surface, the rail coupling comprising: a first part having a first end comprising a first male coupling member and a second end arranged for joining to the first rail; and a second part having a first end comprising a corresponding first female coupling member, arranged to receive the first male coupling member therein, and a second end arranged for joining to the second rail; wherein the rail coupling is arrangeable in: a first configuration wherein the first male coupling member and the first female coupling member are uncoupled; and a second configuration wherein the first male coupling member and the first female coupling member are coupled by receiving the first male coupling member in the first female coupling member; wherein the rail coupling provides a third portion of the running surface in the second configuration.
- first rail i.e. a first length of rail
- second rail i.e. a second length of rail
Abstract
A releasable rail coupling (1000) for releasably coupling a first rail 10A providing a first portion P1 of a miming surface RS for a wheel (120) and a second rail (10B) providing a second portion P2 of the miming surface RS is described. The rail coupling (1000) comprises a first part (1100) having a first end 1110 comprising a first male coupling member (1111) and a second end (1120) arranged for joining to the first rail (10A). The rail coupling (1000) comprises a second part (1200) having a first end (1210) comprising a corresponding first female coupling member (1212), arranged to receive the first male coupling member (1111) therein, and a second end (1220) arranged for joining to the second rail (10B). The rail coupling (1000) is arrangeable in a first configuration wherein the first male coupling member (1111) and the first female coupling member (1212) are uncoupled. The rail coupling (1000) is arrangeable a second configuration wherein the first male coupling member (1111) and the first female coupling member (1212) are coupled by receiving the first male coupling member (1111) in the first female coupling member (1212). The rail coupling (1000) provides a third portion P3 of the running surface RS in the second configuration. In this way, assembly and/or disassembly of the first rail (10A) (i.e. a first length of rail) and the second rail (10B) (i.e. a second length of rail) may be facilitated and/or errors in assembly reduced.
Description
- The present invention relates to rail couplings for releasably coupling rails and to rail assemblies including rails and such rail couplings.
- Typically, a zipline (also known as a zip-line, zip wire, aerial runway or aerial ropeslide) comprises an inclined cable, secured only at upper and lower ends thereof, and a trolley (also known as a bogey), including a freely-rolling pulley. A user (i.e. a load), suspended from the trolley, may be accelerated by gravity from the upper end to the lower end of the inclined cable. In use, the pulley rolls along an uppermost portion of the inclined cable. A gradient of the inclined cable is typically in a range from 1 in 20 to 1 in 30. Usually, the inclined cable sags and appropriate tensioning of the inclined cable is required to control acceleration of the user. Since the inclined cable is secured only at the upper and the lower ends thereof, the inclined cable is restricted to a linear path, without lateral deviations, such as curves or bends.
- To provide a non-linear path including lateral deviations, such as curves or bends, the cable may be replaced with a rail, typically a monorail. The non-linear path enables the rail to curve around obstacles, for example, and/or to increase user enjoyment. An uppermost portion of the rail may be fixed to a framework or hung from ceiling joists or trees, for example, such that a region under the rail remains unobstructed for the trolley and the user to travel through. That is, the rail is a suspended rail, situated at a height typically in a range from 2 m to 10 m, above the ground. A typical rail includes a tube having an axial (also known as longitudinal) flange, for fixing or hanging, upstanding therefrom. The pulley is replaced by one or more freely-rolling wheels, that roll along the rail on an upper lateral portion or portions thereof, clear of the fixed uppermost portion. For example, the wheels may roll either side of the axial flange. For safety, the trolley is arranged to be captive on the rail, such that the trolley (i.e. a captive trolley) remains on the rail, in use. Two or more trolleys may be captive on the rail, such that two or more respective users may travel thereon. The rail is generally inclined, having a mean gradient typically in a range from 1 in 10 to 1 in 60, though may include one or more descending portions, ascending portions and/or horizontal portions. A total length of the rail may be in excess of 500 m, including multiple curves or bends, descending portions, ascending portions and/or horizontal portions. An installed rail may be known as a rail track. The rail may be a continuous (also known as an endless) rail, forming a closed rail track.
- Typically, the rail is provided in lengths (also known as sections), for assembly on site. The assembly of the rail typically includes fitting and joining of adjacent lengths, typically by welding. Fitting and/or joining may be complex due, at least in part, to the rail including multiple curves or bends, descending portions, ascending portions and/or horizontal portions. Errors in the assembly, for example faults and/or discontinuities may increase loadings on, and/or rates of wear of, the trolley and/or rail. These errors may adversely affect rail integrity, trolley reliability and/or user safety, for example. Faults, such as cracks, lack of welding penetration, slag lines or undercut, may compromise structural integrity of the rail. Discontinuities, such as steps or gaps between the adjacent lengths, may increase loading and/or vibration and hence wear and/or fatigue. The assembly of the rail may be performed in situ (i.e. at height), since obstructions such as pre-existing structures or trees may prevent assembly of the rail on the ground before subsequent lifting to the height, complicating assembly. Hence, errors may be more prevalent and/or exacerbated for in situ assembly. Furthermore, disassembly of the rail, for example to replace a damaged length or to resite the rail, may be problematic, for example requiring in situ cutting and subsequent refitting and rejoining of the rail.
- Hence, there is a need to improve joining of rails, for example to improve rail integrity, trolley reliability and/or user safety.
- It is one aim of the present invention, amongst others, to provide a releasable rail coupling, a rail section comprising a part of a rail coupling, a method of manufacturing a rail section, a rail assembly and a kit of parts for a rail assembly including a set of rail sections and a method of assembling a rail assembly which at least partially obviates or mitigates at least some of the disadvantages of the prior art, whether identified herein or elsewhere. In this way, rail integrity, trolley reliability and/or user safety may be improved.
- A first aspect provides a releasable rail coupling for releasably coupling a first rail providing a first portion of a running surface for a wheel and a second rail providing a second portion of the running surface, the rail coupling comprising:
- a first part having a first end comprising a first male coupling member and a second end arranged for joining to the first rail; and
- a second part having a first end comprising a corresponding first female coupling member, arranged to receive the first male coupling member therein, and a second end arranged for joining to the second rail;
- wherein the rail coupling is arrangeable in:
- a first configuration wherein the first male coupling member and the first female coupling member are uncoupled; and
- a second configuration wherein the first male coupling member and the first female coupling member are coupled by receiving the first male coupling member in the first female coupling member;
- wherein the rail coupling provides a third portion of the running surface in the second configuration.
- A second aspect provides a rail section providing a portion of a running surface for a wheel, the rail section comprising a rail and a first part and/or a second part of a rail coupling, according to the first aspect, joined thereto.
- A third aspect provides a method of manufacturing a rail section according to the second aspect, the method comprising:
- joining, by welding, the first part and/or the second part of the rail coupling member to the rail; and optionally, machining the weld.
- A fourth aspect provides a rail assembly, or a kit of parts for a rail assembly, comprising a set of rail sections, including a first rail section and a second rail section, according to the second aspect.
- A fifth aspect provides a method of assembling a rail assembly according to the fourth aspect, comprising:
- moving the rail coupling from the first configuration to the second configuration.
- According to the present invention there is provided a rail coupling, as set forth in the appended claims. Also provided are a rail section comprising a part of a rail coupling, a method of manufacturing a rail section, a rail assembly and a kit of parts for a rail assembly including a set of rail sections and a method of assembling a rail assembly. Other features of the invention will be apparent from the dependent claims, and the description that follows.
- Rail Coupling
- The first aspect provides a releasable rail coupling for releasably coupling a first rail providing a first portion of a running surface for a wheel and a second rail providing a second portion of the running surface, the rail coupling comprising:
- a first part having a first end comprising a first male coupling member and a second end arranged for joining to the first rail; and
- a second part having a first end comprising a corresponding first female coupling member, arranged to receive the first male coupling member therein, and a second end arranged for joining to the second rail;
- wherein the rail coupling is arrangeable in:
- a first configuration wherein the first male coupling member and the first female coupling member are uncoupled; and
- a second configuration wherein the first male coupling member and the first female coupling member are coupled by receiving the first male coupling member in the first female coupling member;
- wherein the rail coupling provides a third portion of the running surface in the second configuration.
- In this way, assembly and/or disassembly of the first rail (i.e. a first length of rail) and the second rail (i.e. a second length of rail) may be facilitated and/or errors in assembly reduced.
- Particularly, the rail coupling is a releasable rail coupling, thereby substantially reducing effort and/or force required for coupling the first rail and the second rail, for example during assembly on site. Hence, the assembly of a rail may be provided by coupling such rail couplings provided between successive lengths of rail, for example on site, including in situ. That is, conventional fitting and/or welding may be avoided and/or eliminated. Furthermore, the disassembly of the rail, for example to replace a damaged length or to resite the rail, is improved, for example without requiring in situ cutting and subsequent refitting and rejoining of the rail. In addition, the rail coupling maintains and/or enhances user safety since structural integrity may be maintained, even during significant deformation, as described below in more detail. Furthermore, grub screw retention of the rail coupling on the first rail and/or the second rail, for example, is not required, facilitating assembly and disassembly while also eliminating a maintenance requirement arising from such grub screws. For example, grub screws may vibrate loose in use, compromising safety and hence requiring frequent maintenance to check and/or re-tighten.
- Particularly, since coupling of the rail coupling is effected by coupling the first male coupling member and the first female coupling member, errors in the assembly may be reduced. As described above, errors such as faults and/or discontinuities may increase loadings on, and/or rates of wear of, a trolley and/or rail. These errors may adversely affect rail integrity, trolley reliability and/or user safety, for example. Faults, such as cracks, lack of welding penetration, slag lines or undercut, may compromise structural integrity of the rail. Discontinuities, such as steps or gaps between the adjacent lengths, may increase loading and/or vibration and hence wear and/or fatigue. The assembly of the rail may be performed in situ (i.e. at height), since obstructions such as pre-existing structures or trees may prevent assembly of the rail on the ground before subsequent lifting to the height, complicating assembly. Hence, errors may be more prevalent and/or exacerbated for conventional in situ assembly. In contrast, by coupling the first male coupling member and the first female coupling member, such faults are avoided and/or eliminated since convention joining by welding mat not be required while discontinuities may be controlled, for example to within predetermined tolerances. In this way, rail integrity, trolley reliability and/or user safety may be improved.
- The releasable rail coupling is for releasably coupling a first rail providing a first portion of a running surface for a wheel and a second rail providing a second portion of the running surface.
- It should be understood that the rail coupling is a releasable rail coupling, which may be coupled and uncoupled, for example repeatedly. That is, the first rail and the second rail may be mutually attached and subsequently detached using the rail coupling.
- It should be understood that the rail coupling is for releasably coupling the first rail and the second rail. That is, the rail coupling forms a part of a rail assembly, provided by coupling the first rail and the second rail via the rail coupling, and hence contributes to a structural integrity of the rail assembly. In use, the rail assembly may be subject to forces, for example due a weight thereof, residual stresses therein, fixing thereof as described above, a trolley running thereon and/or a load, for example a user, suspended therefrom. That is, the rail coupling is for structurally, for example rigidly c.f. flexibly, and releasably coupling the first rail and the second rail. Particularly, the first male coupling member and the first female coupling member, arranged in the second configuration, effectively transfer the forces between the first rail and the second rail.
- Typically, the load comprises and/or is a user, having a mass in a range from 30 kg to 120 kg and hence a weight in a range from 294 N to 1,177 N. In addition, centripetal forces due to cornering may add up to 1.5 g horizontally (i.e. up to 441 N to 1,766 N). Furthermore, an increased vertical load due to down swing (for example, the user swinging from an incline to a vertical position) may add up to 0.6 g vertically (i.e. up to i.e. up to 176 N to 706 N) with no horizontal component. The user may be attached to the attachment member via a harness (also known as a suspension harness), for example. The harness may be include a dorsal D-ring, for example, for attaching to the attachment member via a sling or lanyard. In this way, in use, the user may be suspended in a hang glider-type (also known as a superman) position (i.e. prone or face down). The trolley may include a handle, for the user to hold when in such a prone or face-down position.
- It should be understood that, in use, the load results in (i.e. gives rise to) a downwards vertical force due to gravity, which may be imposed, at least in part, on the rail via the trolley. The load may result in (i.e. give rise to) other forces, for example due to pitching, yawing and/or rolling of the load and/or due to centripetal forces on the load, as described below, that maybe imposed on the trolley and/or on the rail via the trolley. It should be understood that the rail is generally inclined, having a mean gradient typically in a range from 1 in 10 to 1 in 60, though may include one or more descending portions, ascending portions and/or horizontal portions. For example, a rail may include an initial length having a mean gradient of about 1 in 13 (to accelerate the trolley initially), followed by an intermediate length having a mean gradient of about 1 in 25 (corresponding approximately with constant speed of the trolley) and a final length having a mean gradient of about 1 in 50 (to decelerate the trolley).
- It should be understood that the first rail provides the first portion of the running surface for the wheel, for example of a trolley, and the second rail provides the second portion of the running surface. That is, the running surface is a surface for the wheel to run, for example roll, thereon. In one example, the running surface is a continuous running surface, having no, or substantially free from, discontinuities therein, for example no protrusions (i.e. convexities) thereon or depressions (i.e. concavities) therein. As described above, discontinuities may increase loading and/or vibration and hence wear and/or fatigue.
- In one example a discontinuity in the running surface, measured normal and/or parallel thereto, between the first rail section and the second rail section is at most 1 mm, preferably at most 0.5 mm.
- In one example, the running surface comprises a planar running surface and/or a non-planar running surface, for example a concave running surface or a convex running surface.
- The rail coupling comprises the first part and the second part. It should be understood that the first part and the second part are separable parts i.e. not integrally formed or permanently coupled, for example.
- The rail coupling comprises the first part having the first end comprising the first male coupling member and the second end arranged for joining to the first rail.
- It should be understood that the first end of the first part and the second end of the first part are respective opposed ends of the first part.
- It should be understood that the first male coupling member is arranged to be received in the corresponding first female coupling member. That is, the first male coupling member and the corresponding first female coupling member are arranged thus by configuration and/or adaption, for example shaping. In one example, the first male coupling member and the corresponding first female coupling member have corresponding shapes, for example a plug and a socket respectively.
- It should be understood that the second end of the first part is suitable for joining, for example permanently joining such as by welding or non-permanently such as by adhesion or an interference fit, to the first rail, thereby structurally, securely and/or rigidly joining the first part and the first rail. It should be understood that such non-permanently joining methods may not be releasable and/or may result in damage during release and/or may preclude rejoining.
- In one example, the first male coupling member comprises a protrusion, for example a plug.
- In one example, the first male coupling member comprises a circular external cross-sectional shape. In one example, the first male coupling member comprises a cylindrical external shape or a frustoconical external shape. In this way, the first male coupling member may be provided, for example machined such as turned, to a high tolerance and/or surface finish. In this way, relative transverse movement between the first male coupling member and the first female coupling member is reduced, reducing discontinuities therebetween and/or wear due to movement, in use. In one example, an external diameter Dm1,ext of the first male coupling member is provided, for example machined such as turned, to a tolerance within a range from −0.05 mm to +0.00 mm, preferably within a range from −0.02 mm to +0.00 mm, more preferably within a range from −0.01 mm to +0.00 mm of a first coupling member diameter D.
- In one example, a ratio of a length of the first male coupling member to a cross-sectional dimension, for example a diameter or a width, thereof, is in a range from 0.5:1 to 5:1, preferably in a range from 1:1 to 3:1, more preferably in a range from 1.5:1 to 2.5:1. In this way, an amount of the male member received by the female member is relatively large, such that removal therefrom is requires correspondingly relatively large movement, thereby reducing likelihood of failure, in use, by uncoupling due to abnormal loading, for example, and/or better resisting large plastic deformation of the first rail and/or the second without catastrophic failure of the rail coupling and/or the rail.
- The rail coupling comprises the second part having the first end comprising the corresponding first female coupling member, arranged to receive the first male coupling member therein, and the second end arranged for joining to the second rail.
- The second part may be as described with respect to the first part, mutatis mutandis.
- It should be understood that the first end of the second part and the second end of the second part are respective opposed ends of the second part.
- It should be understood that the first female coupling member is arranged to receive the corresponding first male coupling member. That is, the first male coupling member and the corresponding first female coupling member are arranged thus by configuration and/or adaption, for example shaping. In one example, the first male coupling member and the corresponding first female coupling member have corresponding shapes, for example a plug and a socket respectively.
- It should be understood that the second end of the second part is suitable for joining, for example permanently joining such as by welding or non-permanently such as by adhesion or an interference fit, to the second rail, thereby structurally, securely and/or rigidly joining the second part and the second rail. It should be understood that such non-permanently joining methods may not be releasable and/or may result in damage during release and/or may preclude rejoining. In other words, non-permanent joining is not necessarily releasable coupling, as described herein.
- In one example, the first female coupling member comprises a concavity, for example a socket.
- In one example, the first female coupling member comprises a circular internal cross-sectional shape i.e. a circular bore. In one example, the first female coupling member comprises a cylindrical internal shape or a frustoconical internal shape. In this way, the first female coupling member may be provided, for example machined such as turned, to a high tolerance and/or surface finish. In this way, relative transverse movement between the first male coupling member and the first female coupling member is reduced, reducing discontinuities therebetween and/or wear due to movement, in use. In one example, an internal diameter Df1,int of the first female coupling member is provided, for example machined such as turned, bored or drilled, to a tolerance within a range from −0.00 mm to +0.05 mm, preferably within a range from −0.00 mm to +0.02 mm, more preferably within a range from 0.00 mm to +0.01 mm of the first coupling member diameter D. In this way, the first male coupling member is received closely (i.e. close fitting) in the first female coupling member, whereby a gap therebetween is as determined by the tolerances. Particularly, a such a machined-to-machined releasably coupling effectively transfers load therethrough between adjacent rails.
- In one example, a ratio of a length of the first female coupling member to a cross-sectional dimension, for example a diameter or a width, thereof, is in a range from 0.5:1 to 5:1, preferably in a range from 1:1 to 3:1, more preferably in a range from 1.5:1 to 2.5:1. In this way, an amount of the male member received by the female member is relatively large, such that removal therefrom is requires correspondingly relatively large movement, thereby reducing likelihood of failure, in use, by uncoupling due to abnormal loading, for example, and/or better resisting large plastic deformation of the first rail and/or the second without catastrophic failure of the rail coupling and/or the rail.
- In one example, the first female coupling member is arranged to slidably receive, for example axially, the first male coupling member therein. In this way, coupling and uncoupling is facilitated.
- In one example, the first male coupling member and the first female coupling member are arranged to interlock, for example, upon fully receiving the first male coupling member in the first female coupling member. In this way, inadvertent or accidental uncoupling may be prevented.
- In one example, the first male coupling member and the first female coupling member are correspondingly threaded. In this way, load transfer between the first part and the second part may be improved.
- The rail coupling is arrangeable in the first configuration wherein the first male coupling member and the first female coupling member are uncoupled. That is, the first configuration is a disassembled configuration, for example, in which the first male coupling member and the first female coupling member are separate, for example spaced apart, such as by a gap.
- The rail coupling is arrangeable in the second configuration wherein the first male coupling member and the first female coupling member are coupled by receiving the first male coupling member in the first female coupling member. That is, the second configuration is an assembled configuration, for example an in use configuration.
- Running Surface
- The rail coupling provides a third portion of the running surface in the second configuration.
- As described above, the first rail provides the first portion of the running surface for the wheel, for example of a trolley, and the second rail providing the second portion of the running surface. That is, the running surface is a surface for the wheel to run, for example roll, thereon. In one example, the running surface is a continuous running surface, having no, or substantially free from, discontinuities therein, for example no protrusions (i.e. convexities) thereon or depressions (i.e. concavities) therein. As described above, discontinuities may increase loading and/or vibration and hence wear and/or fatigue. In one example, the running surface comprises a planar running surface and/or a non-planar running surface, for example a concave running surface or a convex running surface.
- Hence, in the second configuration, the third portion of the running surface is thus arranged between the first portion and the second portion. That is, the wheel runs on respective portions of the running surface provided successively by the first rail, the rail coupling and the second rail. Hence, rather than a single interface being defined conventionally, in use, between a first rail and a second rail, two interfaces (i.e. between the first rail and the rail coupling and between the rail coupling and the second rail) are instead defined, in use. Thus, discontinuities (particularly steps) otherwise arising at the single interface due to relatively poorer tolerancing and/misshaping of the first rail and the second rail may be averaged due to relatively tighter tolerancing of the rail coupling, for example, thereby providing a more continuous running surface.
- In one example, the first end of the second part provides, at least in part, the third portion of the running surface. That is, the first female coupling member and the, at least in part, the third portion of the running surface are both at the first end. In one example, an external surface of the first female coupling member provides, at least in part, the third portion of the running surface.
- In one example, the first part provides, at least in part, the third portion of the running surface. In one example, a surface of the first part proximal to the second end provides, at least in part, the third portion of the running surface. In one example, the second end of the first part comprises a second male coupling and a surface of the first part between the first end and the second end provides, at least in part, the third portion of the running surface.
- In one example, the first part provides, at least in part, the third portion of the running surface and the first end of the second part provides, at least in part, the third portion of the running surface. In one example, the first part and the second part provide similar or equal parts of the third portion of the running surface.
- In one example, the running surface comprises a cylindrical running surface or a part thereof, for example as provided by a tube or a half round section. In one example, the first rail comprises a first tube having an external diameter Dext, whereby the first portion of the running surface comprises a first portion of a cylindrical running surface, the second rail comprises a second tube having a diameter Dext (i.e. the same diameter as the first tube, at least nominally), whereby the second portion of the running surface comprises a second portion of the cylindrical running surface and the rail coupling comprises a cylindrical region or part thereof having a diameter Dext (i.e. the same diameter as the first tube and the second tube, at least nominally), whereby the third portion of the running surface comprises a third portion of the cylindrical running surface.
- Relief Region
- In one example, the first male coupling member and/or the first female coupling member comprises a relief region, arranged to facilitate moving the rail coupling between the first configuration and the second configuration. In this way, moving the rail coupling from the first configuration to the second configuration is facilitated because mutual alignment of the first male coupling member and the first female coupling member is relaxed. For example, for a plug and socket comprising such a relief region, insertion may be initially off axis and guided to coaxial full insertion.
- In one example, the first male coupling member comprises a plug comprising a relief region provided in an intermediate region thereof, for example having a relatively smaller diameter than adjacent regions thereto. In one example, the first female coupling member comprises a socket comprising a relief region provided in an intermediate region thereof, for example having a relatively larger diameter than adjacent regions thereto.
- Joining to End of Rail
- In one example, the second end of the first part is arranged for joining, for example by welding, to an end of the first rail and/or the second end of the second part is arranged for joining to an end of the second rail.
- In one example, the second end of the first part comprises a second male coupling and/or a second female coupling member for joining to the first rail. In one example, the second end of the second part comprises a second male coupling and/or a second female coupling member for joining to the first rail.
- In one example, the first rail comprises a first tube having an internal diameter Dint, the second rail comprises a second tube having an internal diameter Dint (i.e. the same internal diameter as the first tube, at least nominally), the second end of the first part comprises a second male coupling having an external diameter Dm2,ext where Dm2,ext is compatible with Dint and the second end of the second part comprises a second male coupling having an external diameter Dm2,ext where Dm2,ext is compatible with Dint. It should be understood that where Dm2,ext is compatible with Dint means that Dm2,ext is at most Dint. In one example, an external diameter Dm2,ext of the second male coupling member is provided, for example machined such as turned, to a diameter within a range from −2.00 mm to −0.25 mm, preferably within a range from −1.50 mm to −0.50 mm, more preferably within a range from −1.00 mm to −0.75 mm with respect to Dint. In this way, insertion of the second male coupling into the first rail, for example, is facilitated. In contrast to the relatively close fit between the first male coupling and the first female coupling, the relatively looser fit between the second male coupling and the first rail, for example, is afforded since the first part and the first rail are joined permanently such as by welding or non-permanently such as by adhesion, thereby structurally, securely and/or rigidly joining the first part and the first rail.
- Material
- In one example, the rail coupling is formed from steel according to EN 10025: part 2: 2004 grade S185, S235, S275, S355 or equivalent. In one example, the rail coupling is coated, for example powder coated, painted and/or galvanized, to improve corrosion resistance.
- Third Part
- In one example, the rail coupling comprises a third part, for example a set of fishplates including a first fishplate, for attaching to the first rail and the second rail. In this way, the first rail and the second rail may be mutually aligned. In one example, the first fish plate comprises a set of perforations therethrough for mechanically attaching, for example using mechanical fasteners such as dowels and/or threaded fasteners, to one side of respective flanges of the first rail and the second rail via a set of congruent perforations included in the respective flanges at adjacent ends of the first rail and the second rail. In one example, the set of fishplates includes the first fishplate and a second fishplate, comprising respective set of perforations therethrough, for mechanically attaching, for example using threaded fasteners, to both sides of respective flanges of the first rail and the second rail via a set of congruent perforations included in the respective flanges at adjacent ends of the first rail and the second rail. In one example, the perforations are closely toleranced, for example in a range from +0.10 to +0.20 with respect to the mechanical fasteners, for example a shank thereof. For example, the perforations may have a diameter of 14.00 mm for M14 bolts having a shank diameter of 13.80 mm or a diameter of 12.00 mm for M12 bolts having a shank diameter of 11.80 mm.
- The first male coupling member and the first female coupling member (hence the first part and the second part), arranged in the second configuration, effectively transfer the forces between the first rail and the second rail. In contrast, the third part transfers only a relatively small proportion of the forces between the first rail and the second rail, such that imposed forces on the mechanical fasteners therethrough are relatively low.
- Rail
- In one example, the rail comprises a planar (i.e. a flat) running surface, for example provided by a square or rectangular bar or hollow section and/or by an equal or unequal angle section. In one example, the rail comprises a non-planar, for example a convex or a concave running surface. In one example, the rail comprises a cylindrical (i.e. a convex) running surface defining a cylinder axis, wherein the line is substantially coincident, in use, with the cylinder axis, for example provided by a tube (i.e. a section) having a circular cross-section or a part thereof, such as a U shape channel. Hollow section is preferred, reducing a weight of the rail. In one example, the tube has an external diameter Dext in a range from 40 mm to 100 mm, preferably in a range from 50 mm to 75 mm, for example 60.3 mm. In one example, the tube has a wall thickness in a range from 1 mm to 6 mm, preferably in a range from 2 mm to 5 mm, for example 3 mm or 4 mm, for example 3.2 mm. In one example, the tube has an internal diameter Dint in a range from 35 mm to 95 mm, preferably in a range from 45 mm to 70 mm.
- In one example, the rail comprises a non-linear, for example a curved, portion. In this way, the non-linear portion enables the rail to curve around obstacles, for example, and/or to increase user enjoyment, as described above. It should be understood that the non-linear portion is generally sideways (i.e. transverse to a general direction of travel of a trolley), though the rail may curve sideways and up or down also.
- In one example, the rail comprises two or more rails, for example two parallel rails. In one example, the rail is a monorail (i.e. a single rail). A monorail is preferred, reducing cost and/or weight, may be fixed readily to a framework or hung from ceiling joists or trees, for example, and/or may be formed into relatively complex shapes, including multiple non-linear and linear portions that may also ascend, descend and/or be horizontal.
- In one example, the rail is formed from steel according to EN 10025: part 2: 2004 grade S185, S235, S275, S355 or equivalent. In one example, the tube is seamless tube. In one example, the rail is coated, for example powder coated, painted and/or galvanized, to improve corrosion resistance.
- In one example, the rail comprises a flange. The flange (also known as a web or a stiffener) increases a stiffness of the rail, for example a resistance to bending of the rail.
- In one example, the rail comprises a cylindrical tube, wherein the running surface comprises a cylindrical running surface or a part thereof and wherein the rail comprises a flange.
- In this way, relatively complex non-linear paths may be provided, including lateral deviations, such as curves or bends, and/or one or more descending portions, ascending portions and/or horizontal portions, for example by forming, such as bending or rolling the tube. Furthermore, since the tube has cylindrical symmetry, a transverse curvature of the running surface is relatively invariant, including for relatively complex non-linear paths, thereby providing a more continuous running surface.
- In one example, the flange is arranged upstanding from the tube i.e. extending away therefrom. In one example, the flange is arranged longitudinally with respect to the tube. In one example, the flange is oriented normally to the running surface. In one example, the rail comprises a longitudinal flange. In one example, the flange is arranged to provide a fixing means, for example a lifting eye or a perforation or a set thereof through the flange, for suspension of the rail therefrom. Other fixing means are known. In this way, the rail may be fixed to, for example suspended from, a framework or hung from ceiling joists or trees, for example, such that a region under the rail remains unobstructed for the trolley and the user to travel through. In one example, the longitudinal flange comprises a first set of perforations for suspension. In one example, the longitudinal flange comprises a second set of perforations, congruent with a set of perforations provided in a third part of the rail coupling. In one example, the longitudinal flange extends continuously along a length of the rail. In one example, the flange is welded to the tube, for example continuously or intermittently (i.e. stitch welding, for example on alternate sides of the flange).
- In one preferred example, the rail comprises a cylindrical tube, wherein the running surface comprises a cylindrical running surface or a part thereof and wherein the rail comprises a longitudinal flange normal to the tube (i.e. upstanding therefrom) extending continuously along the tube.
- In one example, a length of the flange is greater than a length of the tube. For example, the flange may extend beyond one or both ends of the tube. In one example, the flange extends beyond both ends of the tube, by distances correlating or coinciding (i.e. equal to or substantially equal to) respective lengths, or parts thereof, of the third portion of the running surface provided by the first part and/or the second part of the rail coupling joined thereto. In this way, the respective ends of flanges of adjacent rails abut or confront when the rail coupling is arranged in the second configuration.
- Rail Section
- A second aspect provides a rail section providing a portion of a running surface for a wheel, the rail section comprising a rail and a first part and/or a second part of a rail coupling, according to the first aspect, joined thereto.
- The running surface and/or the rail may be as described with respect to the first aspect. For example, the rail may be as described with respect to the first rail or the second rail of the first aspect.
- In one example, the rail comprises a cylindrical tube, wherein the running surface comprises a cylindrical running surface or a part thereof and wherein the rail comprises a flange.
- In this way, relatively complex non-linear paths may be provided, including lateral deviations, such as curves or bends, and/or one or more descending portions, ascending portions and/or horizontal portions, for example by forming, such as bending or rolling the tube. Furthermore, since the tube has cylindrical symmetry, a transverse curvature of the running surface is relatively invariant, including for relatively complex non-linear paths, thereby providing a more continuous running surface.
- In one example, the rail is provided in lengths that are coupled end to end, for example on site.
- Method of Manufacturing
- A third aspect provides a method of manufacturing a rail section according to the second aspect, the method comprising:
- joining, by welding, the first part and/or the second part of the rail coupling member to the rail;
- and
- optionally, machining the weld.
- In one example, the method comprises providing the rail by joining, by welding for example stitch welding, a flange to a tube, thereby providing the rail. In one example, the method comprises forming, for example by bending and/or rolling, the tube/or and the flange, thereby forming a curve therein, preferably before joining the flange to the tube. In one example, a length of the flange is greater than a length of the tube and the method comprises arranging the flange to extend beyond one or both ends of the tube, before joining the flange to the tube. In one example, the method comprises arranging the first part and/or the second part whereby respective lengths, or parts thereof, of the third portion of the running surface provided by the first part and/or the second part of the rail coupling correlate or coincide (i.e. equal to or substantially equal to) respective lengths, or parts thereof, of the flange extending beyond one or both ends of the tube. In this way, the respective ends of flanges of adjacent rails abut or confront when the rail coupling is arranged in the second configuration.
- Rail Assembly or Kit of Parts Thereof
- A fourth aspect provides a rail assembly (also known as a rail track), or a kit of parts for a rail assembly, comprising a set of rail sections, including a first rail section and a second rail section, according to the second aspect.
- In one example, the rail assembly comprises a set of M rail sections, wherein M is a natural number greater than 2, 5, 10, 20, 30, 40, 50, 100, or more. In this way, a rail track may be conveniently provided. In one example, each rail section has a length in a range from 1 m to 40 m, preferably in a range from 2 m to 30 m, more preferably in a range from 5 m to 20 m, for example 9 m, 10 m, or 12 m.
- Method of Assembling
- A fifth aspect provides a method of assembling a rail assembly according to the fourth aspect, comprising:
- moving the rail coupling from the first configuration to the second configuration.
- In one example, the method comprises disassembling the rail assembly by moving the rail coupling from the second configuration to the first configuration.
- Trolley
- According to an aspect, there is provided a trolley for a rail, the trolley comprising:
- a frame;
- a set of wheels, including a first wheel and a second wheel, rotatably coupled to the frame;
- and
- an attachment member, coupled to the frame, for attachment, preferably suspension, of a load therefrom, in use;
- wherein the first wheel is rotatable in a first plane about a first axis and the second wheel is rotatable in a second plane about a second axis;
- wherein the first plane and the second plane define a line;
- wherein the trolley is arrangeable in:
- a first configuration, wherein the attachment member is arranged at a first angular displacement about the line; and
- a second configuration, wherein the attachment member is arranged at a second angular displacement about the line, wherein the first angular displacement and the second angular displacement are different.
- Throughout this specification, the term “comprising” or “comprises” means including the component(s), unit(s), module(s), feature(s) or integer(s) specified but not to the exclusion of the presence of other components, units, modules, features or integers.
- The term “consisting of” or “consists of” means including the component(s), unit(s), module(s), feature(s) or integer(s) specified but excluding other components, units, modules, features or integers.
- Whenever appropriate, depending upon the context, the use of the term “comprises” or “comprising” may also be taken to include the meaning “consists essentially of” or “consisting essentially of”, and also may also be taken to include the meaning “consists of” or “consisting of”.
- The optional features set out herein may be used either individually or in combination with each other where appropriate and particularly in the combinations as set out in the accompanying claims. The optional features for each aspect or exemplary embodiment of the invention, as set out herein are also applicable to all other aspects or exemplary embodiments of the invention, where appropriate. In other words, the skilled person reading this specification should consider the optional features for each aspect or exemplary embodiment of the invention as interchangeable and combinable between different aspects and exemplary embodiments.
- For a better understanding of the invention, and to show how exemplary embodiments of the same may be brought into effect, reference will be made, by way of example only, to the accompanying diagrammatic Figures, in which:
-
FIG. 1 schematically depicts an exploded plan view of a rail assembly according to an exemplary embodiment, including a rail coupling according to an exemplary embodiment arranged in a first configuration; -
FIG. 2 schematically depicts plan view of the rail assembly ofFIG. 1 , including the rail coupling arranged in a second configuration; -
FIG. 3 schematically depicts a longitudinal cross-sectional view of the rail coupling ofFIG. 2 ; -
FIG. 4 schematically depicts a longitudinal cross-sectional view of the rail coupling ofFIG. 3 , in more detail; -
FIG. 5 schematically depicts a perspective view of a first part of the rail coupling ofFIG. 1 ; -
FIG. 6 schematically depicts a perspective view of a second part of the rail coupling ofFIG. 1 ; -
FIG. 7 schematically depicts (A) a front elevation view; (B) a side elevation view; and (C) an rear elevation view of the first part of the rail coupling ofFIG. 5 ; -
FIG. 8 schematically depicts (A) a front elevation view; (B) a side elevation view; (C) an rear elevation view; and (D) a longitudinal cross-sectional view of the second part of the rail coupling ofFIG. 6 ; -
FIG. 9 schematically depicts (A) a plan view; (B) a side elevation view; and (C) a front elevation view of a rail of the rail assembly ofFIG. 1 ; -
FIG. 10 schematically depicts (A) a perspective view; (B) a side elevation view; and (C) a front elevation view of a third part of the rail assembly ofFIG. 1 ; and -
FIG. 11 schematically depicts a perspective view of the rail assembly ofFIG. 1 , including a trolley thereon. - Rail Coupling
-
FIG. 1 schematically depicts an exploded plan view of arail assembly 1 according to an exemplary embodiment, including arail coupling 1000 according to an exemplary embodiment arranged in a first configuration. -
FIG. 2 schematically depicts plan view of therail assembly 1 ofFIG. 1 , including therail coupling 1000 arranged in a second configuration. -
FIG. 3 schematically depicts a longitudinal cross-sectional view of therail coupling 1000 ofFIG. 2 . -
FIG. 4 schematically depicts a longitudinal cross-sectional view of therail coupling 1000 ofFIG. 3 , in more detail. - The
releasable rail coupling 1000 is for releasably coupling afirst rail 10A providing a first portion P1 of a running surface RS for awheel 120 and asecond rail 10B providing a second portion P2 of the running surface RS. Therail coupling 1000 comprises afirst part 1100 having afirst end 1110 comprising a firstmale coupling member 1111 and asecond end 1120 arranged for joining to thefirst rail 10A. Therail coupling 1000 comprises asecond part 1200 having afirst end 1210 comprising a corresponding firstfemale coupling member 1212, arranged to receive the firstmale coupling member 1111 therein, and asecond end 1220 arranged for joining to thesecond rail 10B. Therail coupling 1000 is arrangeable in a first configuration wherein the firstmale coupling member 1111 and the firstfemale coupling member 1212 are uncoupled. Therail coupling 1000 is arrangeable a second configuration wherein the firstmale coupling member 1111 and the firstfemale coupling member 1212 are coupled by receiving the firstmale coupling member 1111 in the firstfemale coupling member 1212. Therail coupling 1000 provides a third portion P3 of the running surface RS in the second configuration. - In this way, assembly and/or disassembly of the
first rail 10A (i.e. a first length of rail) and thesecond rail 10B (i.e. a second length of rail) may be facilitated and/or errors in assembly reduced. -
FIG. 5 schematically depicts a perspective view of thefirst part 1100 of therail coupling 1000 ofFIG. 1 . -
FIG. 6 schematically depicts a perspective view of thesecond part 1200 of therail coupling 1000 ofFIG. 1 . -
FIG. 7 schematically depicts (A) a front elevation view; (B) a side elevation view; and (C) an rear elevation view of thefirst part 1100 of therail coupling 1000 ofFIG. 5 . -
FIG. 8 schematically depicts (A) a front elevation view; (B) a side elevation view; (C) an rear elevation view; and (D) a longitudinal cross-sectional view of thesecond part 1200 of therail coupling 1000 ofFIG. 6 . - In this example, the first
male coupling member 1111 and the corresponding firstfemale coupling member 1212 have corresponding shapes, particularly a plug and a socket respectively. - In this example, the first
male coupling member 1111 comprises a cylindrical external shape i.e. a plug. In this example, an external diameter Dm1,ext of the firstmale coupling member 1111 is turned to a tolerance within a range from −0.02 mm to +0.00 mm of a first coupling member diameter D of 51.00 mm. - In this example, a ratio of a length Lm1 of the first
male coupling member 1111 to the external diameter Dm1,ext thereof is about 2.4:1. - The
second part 1200 is as described with respect to thefirst part 1100, mutatis mutandis. - In this example, the first
female coupling member 1212 comprises a cylindrical internal shape. In this example, an internal diameter Df1,int of the firstfemale coupling member 1212 is bored to a tolerance within a range from −0.00 mm to +0.02 mm of the first coupling member diameter D of 51.00 mm. - In this example, a ratio of a length Lf1 of the first
female coupling member 1212 to the internal diameter Df1,int thereof is about 2.5:1. - In this example, the first
female coupling member 1212 is arranged to slidably receive, axially, the firstmale coupling member 1111 therein. - Running Surface
- In this example, the running surface RS is a continuous running surface RS, having no, or substantially free from, discontinuities therein, for example no protrusions (i.e. convexities) thereon or depressions (i.e. concavities) therein. In this example, the running surface RS comprises a convex, particularly a cylindrical, running surface RS.
- In this example, the
first part 1100 provides, at least in part, the third portion P3 of the running surface RS and thefirst end 1110 of thesecond part 1200 provides, at least in part, the third portion P3 of the running surface RS. In this example, thefirst part 1100 and thesecond part 1200 provide similar or equal parts of the third portion P3 of the running surface RS. In this example, an external surface of the firstfemale coupling member 1212 provides, at least in part, the third portion P3 of the running surface RS. - In this example, the running surface RS comprises a cylindrical running surface RS or a part thereof, for example as provided by a
tube 11. In this example, thefirst rail 10A comprises afirst tube 11 having an external diameter Dext of 60.3 mm, whereby the first portion P1 of the running surface RS comprises a first portion P1 of a cylindrical running surface RS, thesecond rail 10B comprises asecond tube 11 having a diameter Dext (i.e. the same diameter as thefirst tube 11, at least nominally), whereby the second portion P2 of the running surface RS comprises a second portion P2 of the cylindrical running surface RS and therail coupling 1000 comprises a cylindrical region or part thereof having a diameter Dext (i.e. the same diameter as thefirst tube 11 and thesecond tube 11, at least nominally), whereby the third portion P3 of the running surface RS comprises a third portion P3 of the cylindrical running surface RS. - Relief Region
- In this example, the first
female coupling member 1212 comprises a socket comprising arelief region 1213 provided in an intermediate region thereof, having a relatively larger diameter than adjacent regions thereto. In this example, an internal diameter Df1,rr of therelief region 1213 of the firstfemale coupling member 1212 is bored to within a range from +2.00 mm to +2.50 mm of the internal diameter Df1,int. - Joining to End of Rail
- In this example, the
second end 1120 of thefirst part 1100 comprises a secondmale coupling 1121 for joining to thefirst rail 10A. In this example, thesecond end 1220 of thesecond part 1200 comprises a secondmale coupling 1221 for joining to thesecond rail 10B. - In this example, the
first rail 10A comprises afirst tube 11A having an internal diameter Dint of 53.9 mm thesecond rail 10B comprises asecond tube 11B having an internal diameter Dint (i.e. the same internal diameter as thefirst tube 11A, at least nominally), thesecond end 1120 of thefirst part 1100 comprises a secondmale coupling 1121 having an external diameter Dm2,ext where Dm2,ext is compatible with Dint and thesecond end 1120 of thesecond part 1200 comprises a secondmale coupling 1221 having an external diameter Dm2,ext where Dm2,ext is compatible with Dint. It should be understood that where Dm2,ext is compatible with Dint means that Dm2,ext is at most Dint. In this example, an external diameter Dm2,ext of the secondmale coupling member 1121 is turned to within a range from −1.00 mm to −0.75 mm with respect to Dint. In this way, insertion of the secondmale coupling 1121 into thefirst rail 10A, for example, is facilitated. - Material
- In this example, the
rail coupling 1000 is formed from steel according to EN 10025: part 2: 2004 grade S355. In this example, therail coupling 1000 is powder coated. - Third Part
-
FIG. 10 schematically depicts (A) a perspective view; (B) a side elevation view; and (C) a front elevation view of athird part 1300 of therail assembly 1 ofFIG. 1 . - In this example, the
rail coupling 1000 comprises athird part 1300, particularly a set of fishplates, for attaching to thefirst rail 10A and thesecond rail 10B, particularly to respective flanges thereof. In this way, thefirst rail 10A and thesecond rail 10B may be mutually aligned. In this example, thefirst fish plate 1300 comprises a set ofperforations 1303 therethrough for mechanically attaching, for example using mechanical fasteners such as dowels and/or threaded fasteners, to one side ofrespective flanges first rail 10A and thesecond rail 10B via the set ofcongruent perforations 13 included in therespective flanges - Rail
-
FIG. 9 schematically depicts (A) a plan view; (B) a side elevation view; and (C) a front elevation view of therail 10 of therail assembly 1 ofFIG. 1 . - In this example, the rail 10 (i.e. the
first rail 10A and/or thesecond rail 10B) comprises a cylindrical (i.e. a convex) running surface RS. In this example, the rail comprises acylindrical tube 11, wherein the running surface RS comprises a cylindrical running surface RS or a part thereof and wherein the rail comprises aflange 12. In this example, thetube 11 has an external diameter Dext of 60.3 mm. In this example, thetube 11 has a wall thickness of 3.2 mm. In this example, thetube 11 has an internal diameter Dint of 53.9 mm. - In this example, the
rail 10 is a monorail (i.e. a single rail). - In this example, the
rail 10 is formed from steel according to EN 10025: part 2: 2004 grade S275 or equivalent. In this example, thetube 11 isseamless tube 11. In this example, therail 10 is powder coated. - In this example, the
flange 12, having a thickness of 12 mm and a height of 100 mm, is arranged upstanding from thetube 11 i.e. extending away therefrom. In this example, theflange 12 is arranged longitudinally with respect to thetube 11. In this example, theflange 12 is oriented normally to the running surface RS. In this example, the rail comprises alongitudinal flange 12. In this example, theflange 12 is arranged to provide a fixing means, particularly a first set of fourperforations 13 through theflange 12. In this example, thelongitudinal flange 12 comprises a second set of four perforations through theflange 12. In this example, thelongitudinal flange 12 extends continuously along a length of the rail. In this example, theflange 12 is welded to thetube 11, for example continuously or intermittently (i.e. stitch welding, for example on alternate sides of the flange 12). - In this example, a length of the
flange 12 is greater than a length of thetube 11. In this example, theflange 12 extends beyond both ends of thetube 11, by distances correlating or coinciding (i.e. equal to or substantially equal to) respective lengths, or parts thereof, of the third portion P3 of the running surface RS provided by thefirst part 1100 and/or thesecond part 1200 of therail coupling 1000 joined thereto. - Trolley
-
FIG. 11 schematically depicts a perspective view of therail assembly 1 ofFIG. 1 , including atrolley 100 thereon. - In this example, the
trolley 100 comprises aframe 110; a set ofwheels 120, including thefirst wheel 110A and a second wheel 120B, rotatably coupled to theframe 110; and an attachment member (not shown), coupled to theframe 110, for attachment, preferably suspension, of the load L therefrom, in use. Thefirst wheel 110A is rotatable in a first plane about a first axis and the second wheel is rotatable in a second plane about a second axis. The first plane and the second plane define a line. Thetrolley 100 is arrangeable in: a first configuration, wherein the attachment member (not shown) is arranged at a first angular displacement about the line; and - a second configuration, wherein the attachment member (not shown) is arranged at a second angular displacement about the line, wherein the first angular displacement and the second angular displacement are different.
- In this example, the
trolley 100 is acaptive trolley 100, as described above. In this example, the set ofwheels 120 are arranged to retain thetrolley 100 on a rail. - Although a preferred embodiment has been shown and described, it will be appreciated by those skilled in the art that various changes and modifications might be made without departing from the scope of the invention, as defined in the appended claims and as described above.
- In summary, a releasable rail coupling, a rail section comprising a part of a rail coupling, a method of manufacturing a rail section, a rail assembly and a kit of parts for a rail assembly including a set of rail sections and a method of assembling a rail assembly are provided.
- The releasable rail coupling is for releasably coupling a first rail providing a first portion of a running surface for a wheel and a second rail providing a second portion of the running surface, the rail coupling comprising: a first part having a first end comprising a first male coupling member and a second end arranged for joining to the first rail; and a second part having a first end comprising a corresponding first female coupling member, arranged to receive the first male coupling member therein, and a second end arranged for joining to the second rail; wherein the rail coupling is arrangeable in: a first configuration wherein the first male coupling member and the first female coupling member are uncoupled; and a second configuration wherein the first male coupling member and the first female coupling member are coupled by receiving the first male coupling member in the first female coupling member; wherein the rail coupling provides a third portion of the running surface in the second configuration.
- In this way, assembly and/or disassembly of the first rail (i.e. a first length of rail) and the second rail (i.e. a second length of rail) may be facilitated and/or errors in assembly reduced.
- Attention is directed to all papers and documents which are filed concurrently with or previous to this specification in connection with this application and which are open to public inspection with this specification, and the contents of all such papers and documents are incorporated herein by reference.
- All of the features disclosed in this specification (including any accompanying claims and drawings), and/or all of the steps of any method or process so disclosed, may be combined in any combination, except combinations where at least some of such features and/or steps are mutually exclusive.
- Each feature disclosed in this specification (including any accompanying claims, and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. Thus, unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features.
- The invention is not restricted to the details of the foregoing embodiment(s). The invention extends to any novel one, or any novel combination, of the features disclosed in this specification (including any accompanying claims and drawings), or to any novel one, or any novel combination, of the steps of any method or process so disclosed.
Claims (19)
1. A releasable rail coupling for releasably coupling a first rail providing a first portion of a running surface for a wheel and a second rail providing a second portion of the running surface, the rail coupling comprising:
a first part having a first end comprising a first male coupling member and a second end arranged for joining to the first rail; and
a second part having a first end comprising a corresponding first female coupling member, arranged to receive the first male coupling member therein, and a second end arranged for joining to the second rail;
wherein the rail coupling is arrangeable in:
a first configuration wherein the first male coupling member and the first female coupling member are uncoupled; and
a second configuration wherein the first male coupling member and the first female coupling member are coupled by receiving the first male coupling member in the first female coupling member;
wherein the rail coupling provides a third portion of the running surface in the second configuration.
2. The rail coupling according to claim 1 , wherein the first female coupling member is arranged to slidably receive, for example axially, the first male coupling member therein.
3. The rail coupling according to claim 1 , wherein the first male coupling member and/or the first female coupling member comprises a relief region, arranged to facilitate moving the rail coupling between the first configuration and the second configuration.
4. The rail coupling according to claim 1 , wherein the second end of the first part is arranged for joining to an end of the first rail and/or the second end of the second part is arranged for joining to an end of the second rail.
5. The rail coupling according to claim 1 , wherein the second end of the first part comprises a second male coupling and/or a second female coupling member for joining to the first rail.
6. The rail coupling according to claim 1 , wherein the first male coupling member comprises a circular cross-sectional shape,
7. The rail coupling according to claim 1 , wherein a ratio of a length of the first male coupling member to a cross-sectional dimension, for example a diameter or a width, thereof, is in a range from 0.5:1 to 5:1, preferably in a range from 1:1 to 4:1, more preferably in a range from 1.5:1 to 3:1.
8. The rail coupling according to claim 1 , wherein the first end of the second part provides, at least in part, the third portion of the running surface.
9. The rail coupling according to claim 1 , wherein the first part provides, at least in part, the third portion of the running surface.
10. The rail coupling according to claim 1 , wherein the running surface comprises a cylindrical running surface or a part thereof.
11. The rail coupling according to claim 1 , comprising a third part, for example a fishplate, for attaching to the first rail and the second rail.
12. A rail section providing a portion of a running surface for a wheel, the rail section comprising a rail and a first part and/or a second part of a rail coupling, according to claim 1 , joined thereto.
13. The rail section according to claim 12 , wherein the rail comprises a cylindrical tube, wherein the running surface comprises a cylindrical running surface or a part thereof and wherein the rail comprises a flange.
14. A method of manufacturing a rail section according to claim 12 , the method comprising:
joining, by welding, the first part and/or the second part of the rail coupling member to the rail.
15. A rail assembly, or a kit of parts for a rail assembly, comprising a set of rail sections, including a first rail section and a second rail section, according to claim 12 .
16. The rail assembly according to claim 15 , wherein a discontinuity in the running surface, measured normal and/or parallel thereto, between the first rail section and the second rail section is at most 1 mm.
17. A method of assembling a rail assembly according to claim 15 , comprising:
moving the rail coupling from the first configuration to the second configuration.
18. The method of claim 14 , further comprising:
machining the weld.
19. The rail assembly of claim 15 , wherein the discontinuity is at most 0.5 mm.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1812514.6 | 2018-07-31 | ||
GB201812514A GB2569837B (en) | 2018-07-31 | 2018-07-31 | Zipline rail coupling |
PCT/GB2019/052049 WO2020025930A1 (en) | 2018-07-31 | 2019-07-22 | Rail coupling |
Publications (1)
Publication Number | Publication Date |
---|---|
US20210310199A1 true US20210310199A1 (en) | 2021-10-07 |
Family
ID=63518287
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US17/264,423 Pending US20210310199A1 (en) | 2018-07-31 | 2019-07-22 | Rail coupling |
Country Status (6)
Country | Link |
---|---|
US (1) | US20210310199A1 (en) |
EP (2) | EP3829731B1 (en) |
KR (1) | KR102654934B1 (en) |
CN (1) | CN112512652B (en) |
GB (1) | GB2569837B (en) |
WO (1) | WO2020025930A1 (en) |
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Publication number | Priority date | Publication date | Assignee | Title |
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KR102228932B1 (en) * | 2020-06-25 | 2021-03-18 | 이주영 | Downhill apparatus for leisure |
KR102200798B1 (en) * | 2020-07-30 | 2021-01-11 | (주)신흥이앤지 | Rail for riding facilities and Riding facilities for reisure |
GB2619705A (en) | 2022-06-08 | 2023-12-20 | Castree Projects Ltd | Apparatus and method |
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- 2019-07-22 WO PCT/GB2019/052049 patent/WO2020025930A1/en unknown
- 2019-07-22 EP EP19745253.5A patent/EP3829731B1/en active Active
- 2019-07-22 KR KR1020217005989A patent/KR102654934B1/en active IP Right Grant
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Also Published As
Publication number | Publication date |
---|---|
KR20210039420A (en) | 2021-04-09 |
EP4360980A2 (en) | 2024-05-01 |
GB2569837A (en) | 2019-07-03 |
KR102654934B1 (en) | 2024-04-03 |
WO2020025930A1 (en) | 2020-02-06 |
GB201812514D0 (en) | 2018-09-12 |
GB2569837B (en) | 2020-01-01 |
EP3829731A1 (en) | 2021-06-09 |
CN112512652A (en) | 2021-03-16 |
EP3829731B1 (en) | 2023-11-29 |
EP3829731C0 (en) | 2023-11-29 |
CN112512652B (en) | 2023-11-28 |
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