GB2619039A

GB2619039A - Ramp hinge

Info

Publication number: GB2619039A
Application number: GB2207646.7A
Authority: GB
Inventors: Morrish Gerry
Original assignee: Enable Access Holdings Ltd
Current assignee: Enable Access Holdings Ltd
Priority date: 2022-05-25
Filing date: 2022-05-25
Publication date: 2023-11-29
Also published as: GB202207646D0

Abstract

A hinge system 1 for a foldable ramp (Fig 4) comprises a first ramp connector 2a with a longitudinally-extending first inner channel 3a and an adjacent longitudinally-extending first outer channel 4a. A second ramp connector 2b likewise has a longitudinally-extending second inner channel 3b and an adjacent longitudinally extending second outer channel 4b. Hinge system 1, further comprises a hinge portion 7 interposed between first and second ramp connectors 2a, 2b. Hinge portion 7 itself has first and second longitudinally-extending hinge pins a5a, 5b and a hinge body 6 extending transversely therebetween. First hinge pin 5a is received in the first inner channel 3a and the second hinge pin 5b is received in the second outer channel 4b. Hinge pins 5a, 5b are pivotable about their respective longitudinal axes inside respective channels 3a, 4b from an open configuration in which ramp connectors 2a, 2b are arranged such that the first and second outer channels 4a, 4bare adjacent each other and interposed between the first and second inner channels 3a, 3b. In a closed configuration where first and second ramp connectors 2a, 2b face each other, the first inner channel 3a and second inner channel 3b are transversely off-set. A foldable ramp per se as well as a kit of parts and an associated method of manufacturing a foldable ramp are also disclosed.

Description

RAMP HINGE

Technical Field

The present disclosure relates to a ramp for facilitating movement between two positions of unequal height. In particular, the present invention relates to a ramp hinge system for foldable ramp.

Background

It is known to use ramps to facilitate movement e.g. for people in wheel chairs, people with mobility impairments, or people pushing pushchairs/prams, between two positions of unequal height. This can be achieved by positioning opposing lateral ends of the ramp respectively at the two positions of unequal height such that the ramp bridges the difference in height. It is also known to use ramps to facilitate access e.g. for people in wheel chairs or for people with goods on trolleys into the back of vehicles.

Some ramps are foldable to facilitate storage and/or transport. Foldable ramps usually comprise two opposing ramp panels each connected by a hinge either to each other or to an interposed central platform/spine. In some known foldable ramps, kerbs are provided on the outer transverse edge of each ramp element, distal to the hinge, to prevent ramp users from exiting the ramp other than via the lateral ends. The hinge allows the ramp to be folded when the ramp is not in use e.g. when the ramp is transported or stored. These ramps are folded with their ramp surfaces (i.e. the surface over which a ramp user travels between lateral ends during use) facing inwardly. Ideally, the kerbs are nested so that one overlays the other in order to make the ramp more compact and easier to store/ transport.

A known approach to realising the nesting of the kerbs in the folded position is to provide the ramp with two differently sized ramp panels. In particular, the transverse width (perpendicular to the direction of travel over the ramp of a ramp user) of one panel is greater than the transverse width of the other ramp panel so that the spacing of the two kerbs from the hinge is different.

One problem with this known approach is that manufacture of the two ramp panels requires differently sized manufacturing equipment which increases manufacturing costs and decreases manufacturing efficiency.

The present disclosure has been realised in light of the above considerations. Summary Accordingly, in a first aspect, there is provided a hinge system for a foldable ramp, the hinge system comprising: a first ramp connector comprising a longitudinally-extending first inner channel and an adjacent longitudinally-extending first outer channel; a second ramp connector comprising a longitudinally-extending second inner channel and an adjacent longitudinally-extending second outer channel; and a hinge portion interposed between the first and second ramp connectors, the hinge portion having first and second longitudinally-extending hinge pins and a hinge body extending transversely therebetween, wherein: the first hinge pin is received in the first inner channel and the second hinge pin is received in the second outer channel; and the hinge pins are pivotable about their respective longitudinal axes inside the respective channels.

By providing a hinge system having two hinge pins which are received within respective connectors (which can each be connected to/integral with a respective inner transverse edge of a ramp panel) in an unsymmetrical arrangement i.e. with one hinge pin in an inner channel of the first ramp connector and the other hinge pin in the outer channel of the second ramp connector, it is possible to use the hinge system with two equally sized ramp panels because in a closed configuration of the hinge system (when the ramp is folded such that the ramp surfaces of the ramp panels face each other) the connectors can face/overlie each other with the inner channels transversely off-set so that the inner transverse edges of the ramp panels are off-set. In turn, this means that the outer transverse edges of the ramp panels and any kerbs thereon are also off-set so that the kerbs can be nested and one (on the ramp panel associated with the second ramp connector) overlays the other (associated with the first ramp connector).

As explained above, this arrangement allows the use of two equally sized ramp panels which reduces manufacturing costs and increases manufacturing efficiency.

Optional features will now be described. These are applicable singly or in any combination with any aspect.

The hinge pins may be pivotable from an open configuration in which the first and second ramp connectors are arranged such that the first and second outer channels are adjacent each other and interposed between the first and second inner channels, to a closed configuration in which the first and second ramp connectors overlie each other with the first inner channel and second inner channel transversely off-set.

In some embodiments, the first and second ramp connectors may be identical. This further reduces manufacturing costs and increases manufacturing efficiency.

Preferred features of the first ramp connector will now be described but it will be appreciated that these features may equally apply to the second ramp connector.

The first ramp connector may comprise a first connector body. The first connector body may be a longitudinally-extending first connector body. The first inner channel may be connected to/integral with the first connector body i.e. the first inner channel may be interposed between the connector body and the first outer channel.

The first connector body may comprise a first recess for receiving an inner transverse edge of a first ramp panel. The first recess may be a longitudinally-extending recess. The first recess may extend substantially parallel to the first inner and outer channels.

The first connector body may comprise an upper portion which, in use, is proximal the ramp surface of the first ramp panel i.e. proximal the surface over which the user travels in use.

The upper portion may comprise a ridged portion. The ridged portion may comprise a series of longitudinally-extending, transversely spaced ridges. The upper portion may comprise a transversely-extending extension from the ridged portion. The transverse extension may be substantially planar and may have a reduced depth On a direction perpendicular to both the transverse extension and the longitudinal extension) compared to the ridged portion.

The first connector body may comprise a lower portion. The lower portion may extend (longitudinally and/or transversely) substantially parallel to the upper portion. The lower portion may, in use, be proximal the lower surface of the first ramp panel i.e. distal the surface over which the user travels in use.

The upper portion may have a greater transverse extension than the lower portion.

The upper and lower portions of the first connector body may be spaced in a depth direction (i.e. in a direction perpendicular to both the transverse extension and the longitudinal extension of the upper/lower portions) by a side portion. The first inner channel may be connected to (including being integral with) the side portion of the first connector body.

The first connector body e.g. the upper portion, lower portion and side portion of the first connector body and the first inner and outer channels may all be integrally formed e.g. they may be extrusion moulded as a single piece.

Together, the upper, lower and side portions of the first connector body may define the first recess. The recess may be defined by a face of the side portion which opposes the face of the side portion connected to the first inner channel.

The first inner channel may comprise a substantially semi-circular transverse cross sectional profile (transverse to the longitudinal axis of the first inner channel) and have a respective diameter. The first outer channel may comprise a substantially semi-circular transverse cross sectional profile (transverse to the axis of the first outer channel) and have a respective diameter. The first inner and outer channels may be identical. The first inner and outer channels may share a common dividing wall i.e. an outer wall portion of the first inner channel may also form an inner wall portion of the first outer channel.

The first inner channel may comprise a longitudinally-extending first inner channel opening for receipt of the first hinge pin. The first inner channel opening may have a transverse dimension smaller than the diameter of the first inner channel. The first outer channel may comprise a longitudinally-extending first outer channel opening. The first outer channel opening may have a transverse dimension smaller than the diameter of the first outer channel. The first inner and outer channel openings may be aligned with each other in common plane.

A transverse reinforcing rib may extend from the junction between the first lower portion and first side portion of the first connector body. This transverse reinforcing rib may be joined to the first outer channel by an upwardly-depending rib. The first inner and outer channels, first side portion, transverse reinforcing rib and upwardly depending rib may define a longitudinally-extending box structure 502. The upwardly-depending rib may curves inwardly into the box structure. The box structure reinforces the first connector member and protects the outer channel in particular from damage or distortion.

The first lower portion may further comprise a plurality of longitudinally-extending, downwardly-depending strengthening ribs.

The first ramp connector may comprise at least one longitudinally-extending chamfered edge which may be provided on the upper portion of the first connector body. It may be provided on the upper portion of the connector body proximal the first inner channel e.g. proximal the join between the upper portion and side portion of the first ramp connector. The chamfered edge or at least one further chamfered edge may be provided on the dividing wall between the first inner and outer channels e.g. on the dividing wall facing the first outer channel and/or facing the first inner channel. The chamfered edge, the further chamfered edge or a yet further chamfered edge may be provided on the outer edge of the outer channel, facing inwards towards the first outer channel opening.

The first ramp connector may be formed of metal such as aluminium e.g. extruded aluminium.

The hinge portion comprises first and second hinge pins spaced by a hinge body. The hinge pins may be identical. The hinge pins may be spherically cylindrical i.e. they may have a transverse profile (transverse to their longitudinal extension) that is substantially circular and a hinge pin diameter. The hinge pin diameter of each hinge pin may be smaller than the diameter of the respective channel in which it the hinge pin is received and larger than the transverse dimension of the respective channel opening. In this way, each hinge pin may be retained within the respective channel by a snap fit engagement. Each hinge pin may have an axial length which substantially matches that of the connector channel in which they are received.

The hinge body may be a longitudinally-extending hinge body. It may have an upper surface which, in use, is proximal the ramp surfaces over which the user travels in use. The upper surface may comprise a ridged portion. The ridged portion may comprise a series of longitudinally-extending, transversely spaced ridges.

The hinge body may have a lower surface disposed on an opposite face of the hinge body to the upper surface. The lower surface may, in use, be proximal the lower surface of the ramp panels i.e. distal the surface over which the user travels in use.

The hinge portion may comprise a first connecting member connecting the hinge body to the first hinge pin and a second connecting member connecting the hinge body to the second hinge pin. The first and second connecting members may be longitudinally-extending members. The first and second connecting members may be provided on opposing transverse edges of the hinge body. They may each depend substantially downwardly and outwardly from respective transverse edges of the hinge body. The connecting members may each have an internal surface extending from the lower surface of the hinge body and an external surface extending from the upper surface of the hinge body.

The connecting members, e.g. their internal surfaces, may each form an obtuse angle with the hinge body, e.g. with the lower surface of the hinge body. For example, each connecting member may depend downwardly and outwardly from the lower surface e.g. at an angle of between 95-160 degrees such as at an angle of between 110-150 degrees e.g. around 135 degrees from the plane of the lower surface of the hinge body.

The angle of dependence of the connecting members relative to the plane of the lower surface may match the angle of the or each chamfered edge on the first/second ramp connectors i.e. may match the obtuse angle of the chamfered edge relative to the plane of the upper portion of the respective connector body.

The hinge pins, the hinge connecting members and the hinge body may be integrally formed to provide the hinge portion, e.g. by extrusion moulding. The hinge portion may be formed of metal such as aluminium e.g. extruded aluminium.

The hinge portion may be connected (including integrally) to a handle holder for gripping a handle. The handle holder may be connected to the hinge body at the lower surface e.g. proximal to the second hinge pin. In use, the handle holder may extend downwardly away from the lower surface. In the open configuration of the hinge system, the handle holder may be located between the first and second ramp connector e.g. between the first and second connector bodies. It may have a depth dimension (i.e. in a direction perpendicular to the longitudinal and transverse extension of the hinge body) that is less than the depth dimension of the connector body so that the handle holder is entirely within a space defined between the connector bodies.

The handle holder may comprise a stem portion and a gripping portion. The stem portion may connect the gripping portion to the hinge body. The stem portion may extend longitudinally at least partially along the hinge body. The gripping portion may comprise a longitudinally-extending channel having a longitudinally-extending opening for receiving and gripping the handle e.g. by crimping of the gripping portion around a portion of the handle such as a webbing portion of a handle. Thus, the gripping portion may have a substantially semi-circular transverse cross-sectional profile. The handle holder may be integrally formed with the hinge body and may be formed of metal such as aluminium e.g. extruded aluminium.

In the open configuration of the hinge system, the first and second ramp connectors may be substantially coplanar i.e. the longitudinal axes of the channels of the first ramp connector and the channels of the second ramp connector may be substantially coplanar and parallel. The first recess and the second recess may be coplanar. The upper portions of the first and the second ramp connectors, and optionally the upper surface of the hinge body may be coplanar. The lower portions of the first and the second ramp connectors may be coplanar. The internal surface of the first connecting member may abut the chamfered edge of the dividing wall of the first channels proximal the first inner channel. The internal surface of the second connecting member may abut the chamfered edge of the outer edge of the second outer channel.

At least the stem portion of the handle holder may extend between the outer channels of the first and second ramp connectors. The handle holder may extend no further than the connector bodies in a depth direction.

To move the hinge system to the closed configuration, the first hinge pin pivots within the first inner channel e.g. until the external surface of the first connecting member abuts the chamfered edge on the first connector body and the second hinge pin pivots in the second outer channel e.g. until the external surface of the second connecting member abuts the chambered edge of the dividing wall between the second channels facing the outer channel. In this way, the hinge body is moved into a position where it is substantially normal to the upper surfaces of the connectors.

In the closed configuration, the first and second ramp connectors face each other i.e. the upper surfaces of the connector bodies face each other. The upper surfaces lie in parallel planes spaced from each other in a direction that is perpendicular to both the longitudinal and transverse elongation of the channels. The upper surfaces are spaced by the hinge body of the hinge portion. The second outer channel substantially overlies the first inner channel. The second inner channel overlies the first connector body e.g. the ridged portion of the first connector body. In this way, the first and second inner channels are off-set rather than aligned.

The first and second recesses are also transversely off-set. This transverse off-setting of the connector bodies in the closed configuration means that any ramp panels connected to the connectors are also transversely off-set in the closed configuration so that any kerbs on the outer transverse edges of the ramp panels can be off-set and nested.

In the closed configuration, the handle holder may be exposed such that the gripping portion extends beyond the second channels in a direction parallel with the upper surfaces of the connector bodies, such that a user can conveniently access the gripping portion e.g. to attach the handle thereto.

In a second aspect, there is provided a foldable ramp for facilitating movement between two positions of unequal height, the foldable ramp comprising: a first ramp panel having an inner transverse edge; a second ramp panel having an inner transverse edge; and a hinge system according to the first aspect interposed between the inner transverse edges of the first and second ramp panels with the inner channel of the first ramp connector connected to or integral with the first ramp panel and the second inner channel of the second ramp connector connected to or integral with the second ramp panel.

In some embodiments, the first and second ramp panels may be identical. Preferred features of the first ramp panel will now be described but it will be appreciated that these features may equally apply to the second ramp panel.

The inner transverse edge of the first ramp panel may be received by the first recess of the first connector body of the hinge system. The first ramp panel may comprise a first ramp surface, i.e. the surface over which the user travels in use. The first ramp surface may comprise a ridged portion. The ridged portion may comprise a series of transversely-extending, longitudinally spaced ridges (perpendicular to the direction of travel of the user on the ramp).

The first ramp panel may comprise an outer transverse edge. The first ramp panel may comprise a first kerb. The first kerb may be integrally formed with the first ramp panel.

Alternatively, the first kerb may be connected to the outer transverse edge of the first ramp panel. The first kerb may have a first kerb portion upstanding perpendicularly from the ramp surface and a first kerb connector for connecting to the outer transverse edge. The first kerb connector may comprise a longitudinally-extending kerb recess for receiving the outer transverse edge of the first ramp panel.

The first ramp panel may have longitudinally spaced lateral edges. The lateral edges may each be provided with an inclined lip portion extending downwards in an in-use depth direction.

In the open configuration of the hinge system, the ramp panels may be coplanar. The ramp panels may be coplanar with the hinge body of the hinge system. The kerb portions of the kerbs may be substantially parallel.

In the closed configuration of the hinge system (when the ramp is folded), the ramp panels may be substantially parallel and transversely off-set. The ramp surfaces may face each other. The inner transverse edges of the ramp panels may be transversely off-set. The outer transverse edges of the ramp panels may be transversely off-set. The kerb portions of the kerbs may be substantially parallel and transversely off-set such that they nest against each other. The kerb portions may be substantially parallel to the hinge body.

In a third aspect, there is provided a kit of parts comprising: the hinge system according to the first aspect and two ramp panels as described above for the second aspect.

In some embodiments, the kit further comprises two kerbs, each attachable to the outer transverse edge of the respective ramp panel.

In some embodiments, the kit further comprises a handle attachable to a handle holder of the hinge system.

In some embodiments, the handle may comprise a handle grip portion interposed between handle webs. The handle grip portion may be formed a plastics material e.g. a hard plastics material. The handle webs may be flexible webs e.g. formed of a woven textile material. The handle webs may be for insertion within and gripping by the gripping portion of the handle holder.

In a fourth aspect, there is provided a method of manufacturing the foldable ramp of the second aspect, the method comprising the steps of: manufacturing the first ramp panel having a first transverse dimension; manufacturing the second ramp panel having a second transverse dimension, the second transverse dimension being equal to the first transverse dimension; providing the hinge system according to the first aspect; fitting the inner transverse edge of the first ramp panel into a first recess of the first ramp connector; fitting the inner transverse edge of second ramp panel into a second recess of the second ramp connector; fitting the first hinge pin into the first inner channel of the first ramp connector; and fitting the second hinge pin into the second outer channel of the second ramp connector.

The method may include manufacturing the ramp panels (e.g. ramp panels as described above for the second aspect) using the same manufacturing equipment, e.g. the same extrusion die. The ramp panels may be manufactured as a multiple e.g. double length panel that is then cut into two (or more) ramp panels.

The method may include manufacturing the hinge portion e.g. manufacturing an integral hinge portion using extrusion moulding.

The method may include manufacturing each of the ramp connectors, e.g. by integrally manufacturing respective connector bodies and channels of each of the ramp connectors. The method may include manufacturing the ramp panels and/or the hinge portion and/or the ramp connectors by extrusion moulding.

The method may include manufacturing kerbs (e.g. by extrusion moulding) for connection to the ramp panels. Additionally or alternatively, the method may include fitting a kerb onto an outer transverse edge of each ramp panel, the outer transverse edge being transversely spaced from the inner transverse edge. For example, this may include connecting the respective outer transverse edge to a kerb connector of the respective kerb, e.g. by inserting the outer transverse edge into a respective longitudinally-extending recess. Alternatively, the method may include integrally forming the kerbs with the ramp panels, e.g. by extrusion moulding.

The method may comprise a step of fitting a handle to a handle holder connected (including integrally) to the hinge system. For example, this may involve inserting handle webs (as described above for the third aspect) into a gripping portion of the handle holder and securing them therein, e.g. by crimping.

The method may include fitting lip portions to longitudinally spaced lateral ends of each of the ramp panels. For example, this may include inserting the lateral ends of the ramp panels into respective lip recesses of the lip portions. Alternatively, the method may include integrally manufacturing the lip portions with the ramp panels. The lip portions may be inclined with respect to the planes of the ramp panels, such that in use, the lip portion extend downwards in a depth direction.

Brief Description of the Drawings

Figure 1 is a front sectional view of components of a hinge system according to an embodiment of the present invention; Figures 2A to 2C show front sectional views of the hinge system transitioning from an open configuration to a closed configuration; Figure 3 is a bottom view of a handle holder and a handle; Figure 4 is a perspective view of a foldable ramp having the hinge system as configured in Figure 2A; and Figure 5 shows a reinforced ramp connector.

Detailed Description of the Embodiments

Figure 1 is a transverse cross-sectional view of components of a hinge system 1 according to an embodiment of the present invention. The hinge system 1 has a first ramp connector 2a, a second ramp connector 2b, and a hinge portion 7 which, in-use is interposed between the ramp connectors 2a, 2b.

In this example, the ramp connectors 2a, 2b are identical. Each of the ramp connectors 2a, 2b has a respective longitudinally-extending connector body 21a, 21b and a pair of adjacent longitudinally-extending channels 3a, 3b; 4a, 4b. For example, the first ramp connector 2a has a first connector body 21a, a first inner channel 3a and an adjacent first outer channel 4a. The first connector body 21a has a first longitudinally-extending recess 10a for receiving an inner transverse edge of a first ramp panel, the first recess 10a being defined by a first upper portion 12a (formed of a ridged portion 8a and a transverse extension 15a), a first lower portion 13a, and a first side portion 14a. By virtue of being identical to the first ramp connector 2a, the second ramp connector 2b also has a longitudinally-extending second connector body 21b including a longitudinally-extending second recess 10b for receiving an inner transverse edge of a second ramp panel, the second recess 10b being defined by a second upper 12b, a second lower 13b, and a second side 14b portions. The second ramp connector 2b further has a second inner channel 3b, and an adjacent second outer channel 4b.

The features of the first ramp connector 2a will now be described in detail but it will be appreciated that this discussion equally applies to the features of the second ramp connector 2b.

The first connector body 21a (i.e. the first upper portion 12a, first lower portion 13a and first side portion 14a) and the first inner 3a and outer 4a channels are preferably all integrally formed, e.g. of aluminium and/or by extrusion moulding.

The first upper portion 12a is, in use, proximal a ramp surface of the first ramp panel (not shown) i.e. proximal the surface over which the user travels in use. The first ridged portion 8a comprises a series of longitudinally-extending, transversely spaced ridges. The first transverse extension 15a extends transversely from the first ridged portion 8a. The first transverse extension 15a is substantially planar and has a reduced depth On a direction perpendicular to both the first transverse extension and the longitudinal extension) compared to the first ridged portion 8a. The first lower portion 13a extends (longitudinally and transversely) substantially parallel to the upper portion 12a. The first lower portion 13a is, in use, proximal a lower surface of the first ramp panel (not shown) i.e. distal the surface over which the user travels in use.

The first ramp connector 2a is configured such that the first upper portion 12a has a greater transverse extension than the first lower portion 13a. Furthermore, the first upper 12a and first lower 13a portions are spaced in a depth direction (i.e. in a direction perpendicular to both the transverse extension and the longitudinal extension of the upper/lower portions) by the first side portion 14a. The first side portion 14a is integral with first inner channel 3a. The first recess 10a is defined by a face of the first side portion which opposes the face of the first side portion integral with the first inner channel 3a. The first recess 10a extends substantially parallel to the first inner 3a and outer 4a channels.

The first inner and outer channels 3a, 4a are aligned with each other in a common plane. Each channel 3a, 4a has a substantially semi-circular transverse cross sectional profile (transverse to the longitudinal axis of the respective channel) and a respective longitudinally-extending channel opening. In this example, the channels 3a, 4a are identical, and each have a diameter larger than the transverse dimension of its respective channel opening. In this way, the first hinge pin 5a can be retained within the respective channel 3a by a snap fit engagement.

Preferably, each channel 3a, 4a has a diameter of 6.15 mm or less, and/or a transverse dimension of the respective channel opening of 5.20 mm or less. The first inner 3a and outer 4a channels share a common dividing wall 22a such that an outer wall portion of the first inner channel 3a forms an inner wall portion of the first outer channel 4a.

The first ramp connector 2a has a longitudinally-extending chamfered edge 23a provided on the first upper portion 12a proximal the first inner channel 3a e.g. proximal the join between the first upper portion 12a and the first side portion 14a. A further chamfered edge 24a is provided on the dividing wall between the first inner 3a and outer 4a channels. A yet further chamfered edge 25a is provided on the outer edge of the first outer channel 4a, thereby facing inwards towards the first outer channel opening.

Next, the hinge portion 7 is discussed. The hinge portion 7 comprises identical first 5a and second hinge 5b pins spaced by a longitudinally-extending hinge body 6. The hinge pins 5a, 5b are spherically cylindrical i.e. they have a transverse profile (transverse to their longitudinal extension) that is substantially circular, such that they can be received by the connector channels 3a, 4a, 3b, 4b having the substantially semi-circular transverse cross sectional profile. Preferably, each hinge pin 5a, 5b has a diameter smaller than the diameter of the respective channel 3a, 4b in which it is received and larger than the transverse dimension of the respective channel opening. For example, the diameter of each hinge pin may be 5.50 mm or less. Each hinge pin 5a, 5b has an axial length which substantially matches that of the channel 3a, 4b in which it is received.

The hinge body 6 has an upper surface 8c which, in use, is proximal the ramp surfaces over which the user travels in use. The upper surface 8c is a ridged surface comprising a series of longitudinally-extending, transversely spaced ridges. The hinge body 6 has a lower surface 6a disposed on an opposite side of the hinge body to the upper surface. The lower surface 6a is, in use, proximal the lower surface of the ramp panels i.e. distal the surface over which the user travels in use.

Furthermore, the hinge portion 7 comprises a first longitudinally-extending connecting member lla connecting the hinge body 6 to the first hinge pin 5a and a second longitudinally-extending connecting member 11 b connecting the hinge body 6 to the second hinge pin 5b. The first and second connecting members 11a, 1 lb each depend substantially downwardly and outwardly from respective opposite transverse edges of the hinge body 6. The connecting members 11a, llb each have a respective internal surface extending from the lower surface 6a of the hinge body, and a respective external surface extending from the upper surface 8c of the hinge body 6.

The internal surfaces of the connecting members 11a, 11 b each form an obtuse angle with the lower surface 6a of the hinge body 6. In this example, each connecting member 11a, llb depends downwardly at an angle of around 135 degrees from the plane of the lower surface 6c of the hinge body 6. Conveniently, this allows the hinge body 6 to be coplanar with the upper surfaces 12a, 12b of the ramp connectors 2a, 2b in use.

In this example, the hinge portion 7 (i.e. its lower surface) is integral with a handle holder 9. In use, the handle holder extends downwardly away from the lower surface 6a proximal to the second hinge pin 5b. It has a depth dimension (i.e. in a direction perpendicular to the longitudinal and transverse extension of the hinge body) that is less than the depth dimensions of the first 21a and second 21b connector bodies so that the handle holder 9 is entirely within a space defined between the connector bodies.

The handle holder 9 has a gripping portion 9b and a stem portion 9a connecting the gripping portion to the hinge body 6. The stem portion 9a extends longitudinally at least partially along the hinge body 6. The gripping portion 9b comprises a longitudinally-extending channel having a longitudinally-extending opening for receiving and gripping a handle e.g. by crimping of the gripping portion 9b around a portion of the handle. Thus, the gripping portion 9b has a substantially semi-circular transverse cross-sectional profile.

The handle holder 9, the hinge pins 5a, 5b, the connecting members 11a, 11b, and the hinge body 6 are preferably integrally formed, e.g. of metal such as aluminium and/or for example by extrusion moulding.

Next, Figures 2A to 2C show front sectional views of the assembled hinge system 1 transitioning from an open configuration to a closed configuration.

In the open configuration (shown in Figure 2A), the hinge portion 7 is interposed between the first 2a and second 2b ramp connectors such that the first hinge pin 5a is received in the first inner channel 3a via its respective channel opening and the second hinge pin 5b is received in the second outer channel 4b via its respective channel opening. The first and second ramp connectors 2a, 2b are arranged such that the first 4a and second 4b outer channels are adjacent each other and interposed between the first 3a and second 3b inner channels. The first and second ramp connectors 2a, 2b are further substantially coplanar i.e. the longitudinal axes of the channels 3a, 4a of the first ramp connector 2a and the channels 3b, 4b of the second ramp connector 2a are substantially coplanar and parallel. The first 10a and second 10b recesses are also coplanar. The upper portions 12a, 12b of the first and the second ramp connectors 2a, 2b, and the upper surface of the hinge body 6 are substantially coplanar. The lower portions 13a, 13b of the first and the second ramp connectors 2a, 2b are coplanar. The internal surface of the first connecting member 11a abuts the chamfered edge 24a of the dividing wall of the first channels 3a, 4a proximal the first inner channel 3a, while the internal surface of the second connecting member 11 b abuts the chamfered edge 24b of the second outer channel 4b.

The handle holder 9 is located between the first and second ramp connectors 2a, 2b i.e. between the first and second connector bodies 21a, 21b. In particular, the handle holder 9 extends between the outer channels 3b, 4b of the ramp connectors 2a, 2b no further than the side portions 14a, 14b of the connector bodies 21a, 21b in a depth direction.

Turning to Figure 2B, to move the hinge system 1 to the closed configuration, the hinge pins 5a, 5b pivot about their respective longitudinal axes inside the respective channels 3a, 4b. In Figure 2B, each hinge pin 5a, 5b pivots in an anticlockwise direction by about 90 degrees. The hinge system 1 has fully transifioned to the closed configuration once the external surface of the first connecting member lla abuts the chamfered edge 23a on the first connector body 21a and the external surface of the second connecting member lib abuts the chambered edge of the dividing wall 24b between the second channels 3b, 4b facing the second outer channel 4b.

In the closed configuration (shown in Figure 20), the hinge body 6 is moved into a position where it is substantially normal to the upper surfaces 12a, 12b of the ramp connectors 2a, 2b and where the ramp connectors face each other with the first inner channel 3a and second inner channel 3b transversely off-set.

Furthermore, in the closed configuration, the upper surfaces 12a, 12b of the connector bodies 21a, 21b face each other and lie in parallel planes spaced from each other in a direction that is perpendicular to both the longitudinal and transverse elongation of the channels 3a, 4a, 3b, 4b. The upper surfaces 12a, 12b are spaced by the hinge body 6 of the hinge portion 7. The second outer channel 4b substantially overlies the first inner channel 3a, while the second inner channel 3b overlies the ridged portion 8a of the first connector body 21a. In this way, the first 3a and second 3b inner channels are transversely off-set rather than aligned. The first and second recesses 10a, 10b are also transversely off-set. This transverse off-setting of the connector bodies 21a, 21b in the closed configuration means that any ramp panels connected thereto are also transversely off-set in the closed configuration so that any kerbs on the outer transverse edges of the ramp panels can be off-set and nested.

Further, in the closed configuration, the handle holder 9 is exposed such that the gripping portion 9b extends beyond the second channels 3b, 4b in a direction parallel with the upper surfaces 12a, 12b of the connector bodies 21a, 21b, such that a user can conveniently access the gripping portion 9 e.g. to attach a handle 16 thereto.

Figure 3 is a bottom view of the handle holder 9 and a handle 16. The handle 16 comprises a handle grip portion 16a interposed between handle webs 16b. The handle grip portion 16a in this example is formed of a plastics material e.g. a hard plastics material. The handle webs 16b in this example are flexible webs e.g. formed of a woven textile material. The handle webs are inserted within and gripped by the gripping portion 9a of the handle holder 9.

Next, turning to Figure 4, a foldable ramp 100 having the hinge system 1 as configured in Figure 2A is shown. The ramp has a first ramp panel 17a, a second ramp panel 17b and the hinge system 1. The first and second ramp panels 17a, 17b each have a respective inner transverse edge, a respective outer transverse edge, and respective longitudinally spaced lateral ends. The first and second ramp panels 17a, 17b further have respective first and second ramp surfaces, i.e. the surfaces over which the user travels in use. The hinge system 1 is interposed between the respective inner transverse edges of the ramp panels. The ramp 100 further comprises a first 19a and a second 19b identical kerbs attachable to the outer transverse edges of the ramp panels and two pairs of identical lip portions 20a, 20b attachable to the lateral ends of the ramp panels. The lip portions 20a, 20b have lip surfaces over which the user travels in use.

In this example, the first 17a and second 17b ramp panels are identical. The features of the first ramp panel 17a will now be described in detail but it will be appreciated that this discussion equally applies to the features of the second ramp panel 17b.

The inner transverse edge of the first ramp panel 17a is received by the first recess 10a of the first connector body 21a of the hinge system 1. The first ramp surface and the lip surfaces of the lip portions 20a, 20b attached to the first ramp element 17a comprise a series of transversely-extending, longitudinally spaced ridges (perpendicular to the direction of travel of the user on the ramp).

The first kerb 19a has a first kerb portion upstanding perpendicularly from the first ramp surface and a first kerb connector comprising a longitudinally-extending kerb recess. The first kerb portion and the first kerb connector are integrally formed as a single piece, e.g. of aluminium and/or by extrusion moulding. The outer transverse edge of the first ramp panel 17a is received by the kerb recess and thus the first ramp panel is connected to the first kerb connector. The first kerb connector may have a lower kerb portion, an upper kerb portion, and a side kerb portion defining the kerb recess. The upper, lower, and side kerb portions can be arranged similarly to the upper, lower, and side portions of the first connector body 21a. In particular, the lower kerb portion may extend substantially parallel to the upper kerb portion.

The lower kerb portion may, in use, be proximal the lower surface of the first ramp panel i.e. distal the first ramp surface. The upper and lower kerb portions of the first connector portion may be spaced by the side kerb portion. The connector portion of the kerb ( i.e. the upper kerb portion, lower kerb portion and side kerb portion) are preferably all be integrally formed, e.g. of metal such as aluminium and/or are extrusion moulded.

A lip portion 20a is connected to each lateral end of the first ramp panel 17a. Each lip portion is inclined with respect to the first ramp 17a surface such that it extends downwards in an in-use depth direction. The lip portion 20a can be integrally formed with the ramp panel or detachably connected to it. For example, the lip portion 20a may include a transversely-extending lip recess formed in a similar or identical manner to the kerb recess described above, such that the respective lateral edge of the first ramp panel 17a is received by the lip recess. Each lip portion 20a, 20b is preferably moulded as a single piece, e.g. of metal such as aluminium and/or by extrusion moulding.

As shown in Figure 4, when the hinge system 1 is in the open configuration, the ramp 100 is unfolded such that the ramp panels 17a, 17b are substantially coplanar with the hinge body 6 of the hinge portion 7, and the kerb portions of the first 19a and second 19b kerbs are substantially parallel.

When the hinge system 1 transitions to the closed configuration, as shown in Figures 2B and 2C, the foldable ramp 100 simultaneously transitions to a folded ramp configuration (not shown). In the folded ramp configuration, the ramp panels 17a, 17b are substantially parallel and transversely off-set, while the ramp surfaces face each other. The inner transverse edges of the ramp panels are mutually transversely off-set and so are the outer transverse edges. The kerb portions of the kerbs 19a, 19b are substantially parallel and transversely off-set such that they nest against each other. The kerb portions are also substantially parallel to the hinge body 6.

The ramp panels 17a, 17b are preferably manufactured using the same manufacturing equipment, e.g. the same extrusion die. For example, the ramp panels may be formed as respective single pieces from sheets of metal, such as aluminium, e.g. by extrusion moulding.

The foldable ramp 100 may be assembled by fitting the inner transverse edge of the first ramp panel 17a into the first recess 10a of the first ramp connector 2a, fitting the inner transverse edge of second ramp panel 17b into the second recess 10b of the second ramp connector 2b, fitting the first hinge pin 5a into the first inner channel 3a of the first ramp connector, and fitting the second hinge pin 5a into the second outer channel 4b of the second ramp connector 2b.

Additionally, the outer transverse edges of the ramp panels 17a, 17b may be inserted respectively into the first and second kerb recesses and/or the lateral ends of the ramp panels may be inserted into the lip recesses of the respective lip portions 20a, 20b. Furthermore, the handle 16 may be fitted into the gripping portion 9b of the handle holder 9, e.g. in the manner described in Figure 3.

Figure 5 shows a reinforced first ramp connector 2a'. The second ramp connector may be similarly reinforced.

A transverse reinforcing rib 500 extends from the junction between the first lower portion 13a' and first side portion 14a' of the first connector body 21a'. This transverse reinforcing rib 500 is joined to the first outer channel 4a' by an upwardly-depending rib 501. The first inner and outer channels 3a', 3b', first side portion 14a', transverse reinforcing rib 500 and upwardly depending rib 501 define a longitudinally-extending box structure 502. The upwardly-depending rib 501 curves inwardly into the box structure 502. The box structure reinforces the first connector member 2a and protects the outer channel 4a' in particular from damage or distortion.

The first lower portion 13a' may further comprise a plurality of longitudinally-extending strengthening ribs 503.

Throughout this specification, including the claims which follow, unless the context requires otherwise, the words "have" , " comprise" , and " include", and variations such as" having", " comprises" , " comprising" , and "including" will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps.

It must be noted that, as used in the specification and the appended claims, the singular forms "a," "an," and " the" include plural referents unless the context clearly dictates otherwise.

Ranges may be expressed herein as from "about" one particular value, and/or to "about" another particular value. When such a range is expressed, another embodiment includes from the one particular value and/or to the other particular value. Similarly, when values are expressed as approximations, by the use of the antecedent "about," it will be understood that the particular value forms another embodiment. The term "about" in relation to a numerical value is optional and means, for example, +/-10%.

The words "preferred" and "preferably" are used herein refer to embodiments of the invention that may provide certain benefits under some circumstances. It is to be appreciated, however, that other embodiments may also be preferred under the same or different circumstances.

The recitation of one or more preferred embodiments therefore does not mean or imply that other embodiments are not useful, and is not intended to exclude other embodiments from the scope of the disclosure, or from the scope of the claims.

Claims

Claims 1. A hinge system for a foldable ramp, the hinge system comprising: a first ramp connector comprising a longitudinally-extending first inner channel and an adjacent longitudinally-extending first outer channel; a second ramp connector comprising a longitudinally-extending second inner channel and an adjacent longitudinally-extending second outer channel; and a hinge portion interposed between the first and second ramp connectors, the hinge portion having first and second longitudinally-extending hinge pins and a hinge body extending transversely therebetween, wherein: the first hinge pin is received in the first inner channel and the second hinge pin is received in the second outer channel; and the hinge pins are pivotable about their respective longitudinal axes inside the respective channels.
2. The hinge system of claim 1 wherein the hinge pins are pivotable from an open configuration in which the first and second ramp connectors are arranged such that the first and second outer channels are adjacent each other and interposed between the first and second inner channels, to a closed configuration in which the first and second ramp connectors overlie each other with the first inner channel and second inner channel transversely off-set.
3. The hinge system according to claim 1 or 2, wherein each of the first and second ramp connectors comprises a respective longitudinally-extending connector body including a respective longitudinally-extending recess for receiving an outer transverse edge of a respective ramp panel, wherein the respective inner channels of the first and second ramp connectors are interposed between the respective longitudinally-extending connector body and the first outer channel.
4. The hinge system according to claim 3, wherein: the first and second ramp connectors each have a respective upper portion and a respective lower portion spaced in a depth direction by a respective side portion, the upper, lower and side portions together defining the respective longitudinally-extending recess; and the first and second ramp connectors each comprise a respective chamfered edge provided on the respective upper portion proximal the join between the respective upper portion and the respective side portion.
5. The hinge system according to any one of the preceding claims, wherein: the respective inner and outer channels of the first and second ramp connector share a common dividing wall; and the first and second ramp connectors each comprise a respective chamfered edge provided on the dividing wall facing the respective outer channel and/or facing the respective inner channel.
6. The hinge system according to any one of the preceding claims, wherein the first and second ramp connectors each comprise a chamfered edge provided on the outer edge of the respective outer channel facing inwards towards the respective outer channel.
7. The hinge system according to any one of claims 4 to 6 wherein the hinge portion comprises a longitudinally-extending first connecting member connecting the hinge body to the first hinge pin and a longitudinally-extending second connecting member connecting the hinge body to the second hinge pin, wherein the first and second connecting members depend substantially downwardly and outwardly from respective transverse edges of the hinge body, thereby forming an angle of dependence relative to a plane defined by a lower surface of the hinge body, wherein the angle of dependence of the connecting members substantially matches the an obtuse angle formed between the or each chamfered edge on the respective connectors and the plane of the respective upper portion of the connector body.
8. The hinge system according to any one of the preceding claims, wherein the hinge portion is connected to a handle holder extending downwardly away from a lower surface of the hinge body.
9. The hinge system according to claim 8 wherein the handle holder extend from the lower surface proximal the second hinge pin.
10. The hinge system according to claim 8 or 9, wherein the handle holder comprises a gripping portion for receiving and gripping a handle and a stem portion connecting the gripping portion to the hinge body.
11. The hinge system according to any one of the proceeding claims wherein an upper surface of the hinge body comprises a plurality of longitudinally-extending, transversely spaced ridges.
12. A foldable ramp comprising: a first ramp panel having an inner transverse edge; a second ramp panel having an inner transverse edge; and a hinge system according to any one of the preceding claims interposed between the inner transverse edges of the first and second ramp panels with the inner channel of the first ramp connector connected to or integral with the first ramp panel and the second inner channel of the second ramp connector connected to or integral with the second ramp panel.
13. The foldable ramp according to claim 12 further comprising a first kerb and a second kerb each comprising a respective kerb portion and a respective kerb connector, wherein each kerb connector comprises a respective longitudinally-extending kerb recess for receiving an outer transverse edge of the respective ramp panel.
14. A kit of parts comprising: the hinge system according to any one of claims 1 to 11 and a first ramp panel having first inner and outer transverse edges and a second ramp panel having second inner and outer transverse edges, the hinge system being connectable between the first and second inner transverse edges.
15. The kit of parts according to claim 14 further comprising two kerbs, each attachable to the outer transverse edge of the respective ramp panel.
16. The kit of parts according to claim 14 or 15 further comprising a handle attachment attachable to the hinge system.
17. A method of manufacturing the foldable ramp according to claim 12 or 13, the method comprising the steps of: manufacturing the first ramp panel having a first transverse dimension; manufacturing the second ramp panel having a second transverse dimension, the second transverse dimension being equal to the first transverse dimension; providing the hinge system according to any one of claims 1 to 10; fitting the inner transverse edge of the first ramp panel into a first recess of the first ramp connector; fitting the inner transverse edge of second ramp panel into a second recess of the second ramp connector; fitting the first hinge pin into the first inner channel of the first ramp connector; and fitting the second hinge pin into the second outer channel of the second ramp connector.
18. The method according to claim 17, wherein the first ramp panel and the second ramp panels are manufactured by extrusion moulding through the same extrusion die.
19. The method according to claim 17 or 18 further comprising a step of manufacturing an integral hinge portion and/or integral first and second ramp connectors to provide the hinge system according to claims 1 to 11.
20. The method according to any one of claims 17 to 19 further comprising a step of manufacturing kerbs for connection to the ramp panels and/or fitting a kerb onto an outer transverse edge of each ramp panel, the outer transverse edge being transversely spaced from the inner transverse edge.
21. The method according to any one of claims 17 to 20 further comprising a step of fitting a handle to the hinge system.