Safety line traveller

Abstract

A traveller for safety line for a fall arrest system has a slot extending to the exterior of the traveller and a safety line locating shuttle provided on-board the traveller wherein the safety line locating shuttle is movable relative to the slot along a predetermined path in a direction across the slot. This aids in accurate positioning of the safety line with respect to the traveller. The slot can be defined between opposed slot edges which are movable relative to one another to reconfigure the slot.

Description

FIELD OF THE INVENTION

The present invention relates to a safety line traveller, particularly to such a traveller for use in a fall arrest or fall safety system.

STATE OF THE ART

In order to protect personnel from falls when working at height it is usual and often a legal requirement, to provide an elongate safety line running across a length of the area in which the personnel are to work. The personnel are attached to the safety line by a lanyard which is provided with a traveller to which the lanyard is secured. The traveller is fixed to the safety line such that it can travel along the safety line. The flexible lanyard is connected at its other end to a harness worn by the user. When connected the user can move with respect to the safety line, tension on the lanyard as the user moves causes the traveller to be dragged to move along the safety line.

The safety line is anchored at each end. In order to allow a long uninterrupted length of safety line a number of intermediate supports are typically provided to support the safety line at predetermined positions along its length. The traveller and supports are designed to cooperate such that the traveller can automatically pass the along the safety line past the intermediate supports with the minimum of interference or snagging.

Such a safety line system having intermediate supports and a traveller arranged to pass along the safety line past the intermediate supports is disclosed in for example WO02/092171. In the system disclosed the intermediate supports are provided with deflector or guide surfaces arranged to abut the traveller on approach to the intermediate support so as to re-orientate the traveller to enable smooth passage past the intermediate support.

The issue is to orientate the slot in the traveller to permit the traveller to move smoothly past the intermediate support when the lanyard is tending to pivot or rotate the traveller out of the optimum alignment for passage past the intermediate support.

In so called horizontal systems (often used on roof top structures) the safety line is typically positioned at waist height and the user often lifts the lanyard held in one hand when walking adjacent the safety line. This causes the traveller to rotate on the safety line to a position in which the traveller is orientated out of the optimum alignment for passage past the intermediate support. As a result the traveller will impact with the intermediate support and snag or jolt.

Similar problems can exist for overhead safety line systems.

SUMMARY OF THE INVENTION

The present invention is intended to provide an improved traveller for a fall arrest or fall safety system.

According to a first aspect, the present invention provides a traveller for safety line for a fall arrest system, the traveller comprising:

• • a slot extending to the exterior of the traveller;
  • a safety line locating shuttle provided on-board the traveller wherein the safety line locating shuttle is movable relative to the slot along a predetermined path in a direction across the slot.

The slot is preferably effectively re-configurable between an open condition in which the slot dimension is of a first size and a closed condition in which the slot remains, but at a smaller size.

Beneficially in certain realisations, biasing means is provided to bias the slot to the closed position from the open position.

It may be preferred that slot is inhibited from re-configuration from the closed position to the open position unless the movable safety line locating shuttle is located in a predetermined position.

It is preferred that the safety line locating shuttle comprises a shuttle configured to embrace and guide a safety line. Beneficially, the safety line locating shuttle comprises a receiving recess or seat for receiving the safety line.

The shuttle is preferably spaced from the slot in-board the traveller of the slot, preferably such that the safety line is arranged to be positioned intermediate or between the shuttle and the slot.

The slot is dimensioned to be smaller than the transverse dimension (diameter) of the safety line such that the safety line cannot pass sideways through the slot.

In one embodiment the safety line locating shuttle is beneficially slidable (preferably in reciprocating motion) relative to the slot.

Preferably the safety line locating shuttle is movable in a direction transversely across the slot between a first extreme position, more to one side of the slot, and a second extreme position, more toward the other side of the slot.

In one preferred embodiment, the safety line locating shuttle may be slidably mounted to a traveller body element.

Beneficially, the arrangement further comprises a load member for attachment to fall safety equipment. In certain embodiments, it is preferred that the load member can be rotated through 180 to 360 degrees about an axis to enable the load member to project in one of opposed directions from the traveller. The axis of rotation is preferably perpendicular to the axial direction of the safety line.

In a preferred embodiment, the slot is defined between opposed slot edges, which are movable relative to one another to reconfigure the slot.

This provides a further aspect of the invention which may be defined in general terms as a traveller for safety line for a fall arrest system, the traveller comprising a slot extending to the exterior of the traveller, characterised in that the slot is defined between opposed slot edges which are movable relative to one another to reconfigure the slot.

Beneficially a respective slot edge is freely deflectable to reconfigure the slot in use.

In addition to the slot being re-configurable in use to vary the size of the slot when attached to and drawn along the safety line, it is preferred that the slot is re-configurable between an open condition in which the slot dimension is of a first size and a closed condition in which the slot remains, but at a smaller size. This permits the traveller to be mounted to the safety line at a point intermediate the ends of the safety line. In the open configuration the slot is dimensioned to permit the safety line to pass through sideways. In the closed condition the safety line cannot pass through the slot because the slot is not large enough to permit this. Nonetheless in the closed configuration the slot is re-configurable, over a permitted range of movement, in use to vary the size of the slot when attached to and drawn along the safety line.

In certain realisations it is preferred that biasing means is provided to bias the slot to the closed position from the open position.

In certain embodiments, it is preferred that a respective slot edge is deflectable by means of pivotal movement to reconfigure the slot. In such an embodiment a respective edge may be provided on a support element which is pivotally mounted to the traveller. Beneficially the pivot axis is in a direction generally parallel to the axis of the safety line when in the traveller.

In certain embodiments, it is preferred that a respective slot edge is deflectable by means of linear movement, such as sliding movement, to reconfigure the slot. In such an embodiment a respective edge may be provided on a support element which is linearly movably (for example slidably) mounted to the traveller.

In certain embodiments, it is preferred that each of the opposed edges defining the slot are provided on a respective support element which is movably (preferably linearly) mounted to the traveller.

Beneficially, the/or each slot edge is biased under gravity to a neutral position.

Beneficially, in all positions during operation, the slot width between the edges is small enough to prevent the safety line passing via the slot out of captive engagement with the traveller.

According to a further aspect, the invention provides a traveller for a safety line for a fall arrest system, the traveller comprising a traveller body having a zone for receiving a safety line and a slot in communication between the zone and the exterior of the traveller; and a load element facilitating attachment to a person, the load element comprising an arm which is arranged to extend outwardly from the body and in a direction to cross the level of the safety line receiving zone in the traveller.

In one embodiment, it may be preferred that the biasing means comprises resilient biasing means which is energised when the slot moves to the open position and acts to restore the slot to the closed position.

It is preferred that a release actuator arrangement is provided, which requires deployment from a home position in order to permit re-configuration of the slot from the closed position to the open position. Beneficially, the biasing means is associated with the release actuator arrangement.

In one embodiment, it is preferred that the release actuator arrangement comprises a plurality of actuators positioned with one on either opposed side of the traveller. This ensures that the slot can only be opened deliberately and ameliorates the likelihood of accidentally opening the slot when the user is connected to the safety line.

It is preferred that the movable safety line receiving element (such as a shuttle) is arranged to be held in a restrained position when the slot is in the open position.

Where a release actuator arrangement is provided, which requires deployment from a home position in order to permit re-configuration of the slot from the closed position to the open position, it may be preferable that the movable safety line receiving element (such as the shuttle) is arranged to be held in the restrained position by deployment of the release actuator arrangement.

Other preferred features are in accordance with earlier described aspects.

The invention will now be further described in specific embodiments by way of example only and with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic side view of a first embodiment of traveller in accordance with the invention;

FIG. 2 is a view of the embodiment of FIG. 1 mounted on an intermediate support for a safety line.

FIGS. 3 and 4 are views of the embodiment of FIGS. 1 and 2 at opposite extremes of rotational orientation with respect to the intermediate support of the safety line;

FIG. 5 is a cross sectional view of the embodiment of the preceding figures;

FIG. 6 is a schematic side view of an alternative embodiment of a traveller in accordance with the invention.

FIG. 7 is a view of the embodiment of FIG. 6 mounted on an intermediate support for a safety line.

FIGS. 8 and 9 are views of the embodiment of FIGS. 6 and 7 at opposite extremes of rotational orientation with respect to the intermediate support of the safety line;

FIG. 10 is a schematic side view of an alternative embodiment of a traveller in accordance with the invention;

FIG. 11 is a schematic sectional view of an embodiment similar to the embodiment of FIG. 10;

FIG. 12 is a view of the embodiment of FIG. 11 mounted on an intermediate support for a safety line.

FIGS. 13 and 14 are views of the embodiment of FIGS. 11 and 12 at opposite extremes of rotational orientation with respect to the intermediate support of the safety line;

FIG. 15 is a plan view of the traveller of FIGS. 11 to 14;

FIG. 16 is a side view of the embodiment of FIGS. 11 to 15 in position on a safety line;

FIG. 17 is a side view of a further alternative embodiment of traveller in accordance with the invention;

FIG. 18 is a sectional view along the sectional line shown on FIG. 17;

FIG. 19 is a side view of the traveller of FIGS. 17 and 18 in an alternative configuration in which one of the paddles can be opened to permit mounting on the safety line;

FIG. 20 is a sectional view along the sectional line shown on FIG. 19;

FIG. 21 is a plan view of the traveller of FIGS. 17 to 20;

FIG. 22 is a sectional view along the sectional line shown on FIG. 21;

FIG. 23 is a plan view of the traveller of FIGS. 17 to 22 in the configuration of FIG. 19 in which one of the paddles can is tilted open to permit mounting on the safety line;

FIG. 24 is a sectional view along the sectional line shown on FIG. 23;

FIG. 25 is a sectional view along the sectional line shown on FIG. 26;

FIG. 26 is a view corresponding to the view of FIG. 19;

FIG. 27 is a sectional view along the sectional line shown on FIG. 28;

FIG. 28 is a view corresponding to the view of FIG. 17;

FIGS. 29 to 31 are sectional views of a further alternative embodiment of traveller in accordance with the invention, shown in different operational configurations.

FIGS. 32 to 34 are views of the traveller of FIGS. 29 to 31 mounted on an intermediate support for a safety line in various angles of rotational orientation with respect to the intermediate support of the safety line;

FIGS. 35 to 37 are explanatory sectional views showing re-configuration of the device of FIGS. 29 to 34 between the open configuration and the closed configuration enabling mounting to a safety line;

FIGS. 38 and 39 are detail views of parts of the traveller of FIGS. 29 to 37.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring to the drawings and initially to FIGS. 1 to 5, there is shown a safety line traveller 1 comprising a body 2 arranged to be held captive on and run along a safety line. The body is provided with an interior space 3 for receiving the safety line and a slot 4 defined between a pair of edges 2a 2b running in the longitudinal direction of the safety line. The slot extends to the exterior of the traveller. As shown in FIG. 2 the safety line is supported by intermediate supports 6 which have a cylindrical portion 7 defining a cylindrical channel 5 through which the safety line passes. A narrow section 8 of the support 6 extends from the cylindrical portion 7 to a distal anchor portion of the support (not shown) enabling the support to be secured to a support post or directly to a structure (usually by means of a threaded bolt or other mechanical fixing. Such supports are well known in the art.

As can be seen from the drawings, the slot 4 defined between the pair of edges 2a 2b running in the longitudinal direction of the safety line is of a gap sufficiently large to allow the narrow section 8 to pass through the gap as the traveller moves past the intermediate support. However the slot 4 defined between the pair of edges 2a 2b is sufficiently small so as not to allow the safety line to pass out of the interior space 3 of the body when the traveller is moving along the safety line between the intermediate supports. Consequently it can be seen that it is important to align the slot 4 defined between the pair of edges 2a 2b accurately with the narrow section 8 of the support 6 in the absence of any other means of correcting for mis-alignment.

In the arrangement of FIGS. 1 to 5, the lanyard or other means of attachment to the user is connected, typically by a karabiner, attached to an eye 10 provided in an arm 11 extending from the body 2.

Positioned in the body 2 at the interior space 3 is a safety line locating shuttle 15 that is able to move in a predetermined manner in the direction of separation of the pair of edges 2a 2b. Typically the safety line locating shuttle 15 is capable of moving, in reciprocating motion, between extreme positions across at least a part of the slot 4 defined between the pair of edges 2a 2b. This may be achieved for example by the shuttle 15 being mounted to be slidable along a slider pin 16 mounted in the body 2 and extending across the interior space 3 of the body 2. The safety line locating shuttle 15 is provided with an arcuate recess 14 in a lower portion arranged to locate with the safety line, or the cylindrical head 7 of the intermediate support, depending upon whether the shuttle is passing the intermediate support 6 or along a length of the safety line.

As shown in FIG. 2, the shuttle is located centrally over the slot 4 as it passes the intermediate support 6 such that the narrow section 8 can move through the slot 4. This is because the traveller 1 is in its neutral position as it is dragged past the support 6, in which the traveller is orientated horizontally (i.e. the slot is horizontal).

As shown in FIG. 3, if the traveller 1 is dragged past the intermediate support 6 in circumstances in which the lanyard is pulling downwardly on the arm 11 (arrow A), the traveller body 2 rotates such that the slot 8 is no longer orientated horizontally. Due to the nature of its construction, when this occurs, the shuttle 15 becomes re-orientated by moving upwardly and to the right in the figure to its extreme right position. This permits the narrow part 8 of the intermediate support 6 to pass through the slot 4. Effectively the point of location of the cylindrical tube 7 in the body of the traveller 2 is moved to compensate for the re-orientation of the traveller body about the axis of the safety line or the cylindrical tube 7 of the support 6.

Conversely, and as shown in FIG. 4 if the traveller 1 is dragged past the intermediate support 6 in circumstances in which the lanyard is pulling upwardly on the arm 11 (arrow B), the traveller body 2 rotates such that the slot 8 is no longer orientated horizontally. Due to the nature of its construction, when this occurs, the shuttle 15 becomes re-orientated by moving upwardly and to the left in the figure to its extreme left position. This permits the narrow part 8 of the intermediate support 6 to pass through the slot 4.

The slot 4 can therefore be dimensioned to permit the narrow section 8 of the support to pass in a wide degree of differing angular orientations, whilst ensuring that the safety line (on approach to, or exit from the support) or the support tube 7 is accurately held in the appropriate position with respect to the traveller body.

In the embodiment shown, the shuttle 15 is attached to the arm 11, such that as the shuttle 15 moves so too does the arm 11. The arm is however rotatable through at least 360 degrees with respect to the shuttle 15. A mounting spindle 17 passes through a circular aperture 19 in the arm 11 to be received in a bore 18 in the upper surface of the shuttle 15. The spindle 19 is provided with a cap 20. The slider pin 16 passes through the spindle 19. The arm in most cases will only be required to be rotatable with respect to the shuttle 15 or traveller body 2 through 180 degrees. This will enable the arm to be used on either opposed side of the safety line.

Referring now to the traveller arrangement shown in FIGS. 6 to 9, the traveller 101 comprises a traveller body 102 arranged to be held captive on and run along a safety line. The body 102 is provided with an interior space 103 for receiving the safety line and a slot 104 defined between a pair of edges 102a 102b running in the longitudinal direction of the safety line. As shown in FIG. 7 the safety line is supported by intermediate supports 6 which have a cylindrical tube portion 7 defining a cylindrical channel 5 through which the safety line passes. A narrow section 8 of the support 6 extends from the cylindrical portion 7 to a distal anchor portion of the support (not shown) enabling the support to be secured to a support post or directly to a structure (usually by means of a threaded bolt or other mechanical fixing. Such supports are well known in the art.

As in respect of the previously described embodiment, the users lanyard (or other means of attachment to the user) is connected, typically by a karabiner, attached to an eye 110 provided in an arm 111 extending from the body 2.

In this embodiment the slot 104 is defined between the pair of edges 102a 102b each provided on a separate pivotally movable paddle or element 102c 102d. Each paddle or element 102c 102d is mounted to an upper body element 102e by means of a separate pivot fixing 126127. In a ‘normal’ configuration as shown in FIG. 7, the paddles are arranged to be orientated under gravity such that a turning moment arises about the pivot fixings 126127 to urge the shoulders 102f 102g into engagement with reaction surfaces provided on the upper body element 102e. In an alternative embodiment biasing means (such as spring elements) may be used to bias the paddle elements 102c 102d to a normal position (which may be the position shown in FIG. 7 or another ‘home position).

In this orientation (as shown in FIG. 6/7) the slot 104 between edges 102a 102b is sufficiently large to allow the narrow section 8 to pass through the gap as the traveller moves past the intermediate support. However the slot 104 defined between the pair of edges 102a 102b is sufficiently small so as not to allow the safety line to pass out of the interior space 103 of the body when the traveller is moving along the safety line between the intermediate supports. Consequently it can be seen that it is important to align the slot 4 defined between the pair of edges 2a 2b accurately with the narrow section 8 of the support 6 in the absence of any other means of correcting for mis-alignment.

However in this embodiment, it is possible for the paddles 102c 102d to pivotally re-orientate from the normal position when approaching or passing the intermediate support 6 in the event that the traveller has been forced to a rotationally re-oriented position with respect to the safety line or the cylindrical tube 7 of the intermediate support.

As shown in FIG. 8, if the traveller 101 is dragged past the intermediate support 6 in circumstances in which the lanyard is pulling downwardly on the arm 111 (arrow A), the traveller body 102 rotates such that the slot 104 is no longer orientated horizontally. Due to the nature of its construction, particularly the provision of the inclined lower surface 102h of paddle 102c, when approaching the support 6, the paddle 102c becomes re-orientated as a result of contact between surface 102h and the leading edge of the narrow section 8 of the support, so as to displace the paddle 102c such that its edge 102b rotates upwardly toward the space 103. This permits the narrow part 8 of the intermediate support 6 to pass through the re configured slot 104. Effectively the slot 104 is re-configured by the pivoting of paddle 102c in order to compensate for the re-orientation of the traveller body about the axis of the safety line or the cylindrical tube 7 of the support 6.

Conversely, and as shown in FIG. 9 if the traveller 101 is dragged past the intermediate support 6 in circumstances in which the lanyard is pulling upwardly on the arm 111 (arrow B), the traveller body 2 rotates such that the slot 104 is no longer orientated horizontally. Due to the nature of its construction, when this occurs, the paddle 102d becomes re-orientated as a result of contact between surface 102j and the leading edge of the narrow section 8 of the support, so as to displace the paddle 102d such that its edge 102a rotates upwardly toward the space 103. This permits the narrow part 8 of the intermediate support 6 to pass through the re configured slot 104. Effectively the slot 104 is re-configured and altered in spacing distance, by the pivoting of paddle 102c in order to compensate for the re-orientation of the traveller body about the axis of the safety line or the cylindrical tube 7 of the support 6.

In both extremes of reconfiguration of the paddles, the slot 104 is maintained at a dimension at which the tube 7 and/or the safety line cannot pass through

The traveller 101 can therefore be configured automatically permit the narrow section 8 of the support to pass in a wide degree of differing angular orientations of the traveller.

In this embodiment also the arm is however rotatable through at least 180 degrees (even possibly through 360 degrees) being mounted via a spindle attached to cap 320 which extends through a circular mounting aperture in the arm 311 to be received in a bore in the valve body. This enables 180 or 360 degrees rotation with respect to the valve body enabling the device to be adapted for use on either of the opposed sides of a safety line.

Referring now to the embodiment of FIG. 10, there is shown a safety line traveller that combines the features of the re-orientatable, slidable shuttle 15 of the first embodiment with the re-orientatable paddles of the second embodiment. In FIG. 10 the shuttle 315 is shown and is mounted to the main traveller body 302e by means of a slider pin extending across the traveller upper body 302e. The pin is not shown in FIG. 10, but it will be appreciated that the shuttle 315 is provided with a bore through which the slider pin extends such that the shuttle can slide across the body from one extreme position to another. The slot 304 is defined between the edges of the paddles 302c 302d, which are both pivotally 6 mounted to the upper traveller body 302e by means of the pivot fixings 326327.

The embodiment of FIG. 10 having both the shuttle feature and the re-orientatable paddles provides that the arrangement is technically versatile and highly effective in smoothly passing by an intermediate support. The embodiment of FIG. 10 also has an attachment eye 310 in the arm 311 that is oriented to define a pass through direction which is in the same general direction as the direction in which the safety line extends (i.e. in the same general direction of travel as the direction of travel of the traveller). This provides technical advantage.

Referring now to the embodiment of FIGS. 11 to 16, the traveller is generally similar to the embodiment of FIG. 10 except that the arm 311 is provided with an eye 311 extending from the upper surface to the lower surface of the arm. FIG. 11 shows the shuttle 315 mounted to the upper traveller body 302e by means of a slider pin 316 extending across the traveller upper body 302e. The shuttle 315 is provided with a bore through which the slider pin extends such that the shuttle can slide across the body from one extreme position to another. The slot 304 is defined between the edges of the paddles 302c 302d, which are both pivotally mounted by means of pivot fixings 326 to the upper traveller body 302e.

In the embodiment shown in FIGS. 10 to 16 and as clearly shown in FIG. 11, the shuttle 315 is attached to the arm 311, such that as the shuttle 315 moves so too does the arm 311. The arm is however rotatable through at least 180 degrees (typically fully 360 degrees) with respect to the shuttle 315. A mounting spindle 317 passes through a circular aperture 319 in the arm 311 to be received in a blind bore 18 in the upper surface of the shuttle 15. The spindle 19 is provided with a cap 320. The slider pin 316 passes through the spindle 319. The arm 311 in most cases will only be required to be rotatable with respect to the shuttle 15 or traveller body 2 through 180 degrees. This will enable the arm to be used on either opposed side of the safety line. It should be noted that, in the embodiment shown, the arm 311 is inclined outwardly and downwardly from the traveller to a degree to cross the level of the safety line. This ensures that when the traveller is in use the arm 311 when rotated will only do so until it clashes with the safety line or intermediate support (as shown most clearly in FIG. 16). The arm therefore extends outwardly and in a transverse direction to pass across the level of the safety line position in the traveller 301.

As shown in FIG. 12, the shuttle 315 is located centrally over the slot 304 as it passes the intermediate support 6 such that the narrow section 8 can move through the slot 304. This is because the traveller 301 is in its neutral position as it is dragged past the support 6, in which the traveller is orientated horizontally (i.e. the slot is horizontal). In a ‘normal’ configuration as shown in FIG. 12, the paddles 302c 302d are arranged to be orientated under gravity such that a turning moment arises about the pivot fixings 326327 to urge the shoulders 302f 302g into engagement with reaction surfaces provided on the upper body element 302e. In this orientation the slot 304 between edges 302a 302b is sufficiently large to allow the narrow section 8 to pass through the gap as the traveller moves past the intermediate support.

As shown in FIG. 13, if the traveller 301 is dragged past the intermediate support 6 in circumstances in which the lanyard is pulling downwardly on the arm 311 (arrow A), the traveller rotates such that the slot 308 is no longer orientated horizontally. As a result, the shuttle 315 becomes re-orientated by moving upwardly and to the right in the figure to its extreme right position. Simultaneously, when approaching the support 6, the paddle 302c becomes re-orientated as a result of contact between surface 302h and the leading edge of the narrow section 8 of the support, so as to displace the paddle 302c such that its edge 302b rotates upwardly toward the shuttle 315. This permits the narrow part 8 of the intermediate support 6 to pass through the re configured slot 304. This permits the narrow part 8 of the intermediate support 6 to pass through the slot 304.

FIG. 14 shows the reverse situation in which the traveller 301 is dragged past the intermediate support 6 in circumstances in which the lanyard is pulling upwardly on the arm 311 (arrow B). The shuttle 315 becomes re-orientated by moving upwardly and to the left in the figure to its extreme left position. Simultaneously, when approaching the support 6, the paddle 302d becomes re-orientated as a result of contact between surface 302j and the leading edge of the narrow section 8 of the support, so as to displace the paddle 302d such that its edge 302a rotates upwardly toward the shuttle 315. This permits the narrow part 8 of the intermediate support 6 to pass through the slot 304.

The combined use of the re-orientatable paddles to define the slot and the shuttle 315 provides maximum benefits in terms of use.

Referring now to FIGS. 17 to 28, there is shown a further embodiment of traveller that embodies the re-orientatable paddles 402c 402d and also the shuttle 415 and includes further functionality in that one of the paddles 402d can be moved from its ‘normal’ position to an open position in which the slot 404 defined by the spacing between the edges 402a 402b of the paddles is large enough for the diameter of the safety line to pass through. For safety reasons the paddle 402d can only be moved from the normal position to the open position when a pair of actuator buttons 431432 are pressed simultaneously into the traveller upper body 402e.

Furthermore the arrangement is such that the pair of actuator buttons 431432 can only be pressed simultaneously into the traveller upper body 402e when the shuttle 415 is in a specific position with respect to the traveller upper body 402e. This ensures that the safety line can only be received into the shuttle when the shuttle 415 is correctly aligned to receive the safety line and prevents the safety line being incorrectly inserted via the between the edges 402a 402b of the paddles into a space to one side or the other of the shuttle 415.

A further feature is that the button actuators 431432 are biased outwardly by means of springs 433434 such that when released they revert to their position projecting outwardly from the upper traveller body 402e. In moving back to that position, the paddle 402d is urged back to the normal position in which the gap between the paddle edges 402a 402b is sufficiently small too prevent the safety line from passing out of the traveller 401 via the slot 404.

In FIGS. 17 and 18 the shuttle 415 is shown in its intermediate position directly opposite the slot. The shuttle 415 is freely movable across from one side of the slot 404 to the other as in the earlier described embodiments. The shuttle 415 travels on the slider pin 416 guided in a channel 435 in the upper traveller body 402e. The button actuators 431432 are biased outwardly by the springs 433434 and project outwardly from the traveller upper body 402e on opposed sides of the traveller 401. The button actuators slide in respective recesses 441 in upper traveller body 402e and have guide slots 439 which accommodate a fixed guide pin 440 in order to guide the travel of the respective button actuator.

The shuttle 415 is provided at opposed sides with respective recess formations 436 which are shaped and dimensioned to receive complementary engagement projections 437 provided on the button actuators 431432. The alignment of the recess formations 436 of the shuttle 415 with the projections 437 of the button actuators 431432 only occurs when the shuttle 415 is slid to a specific position with respect to the upper body 402e and slot 404 (i.e. the spacing between the edges 402a 402b of the paddles 402c 402d). In the embodiment shown the alignment position is designed to be at the maximum extent of travel of the shuttle 415 to one side of the slot 404. This is because the position is easy for the user to locate. In this specific position the button actuators 431432 can be simultaneously pressed into the traveller body, acting against the biasing springs 433434, such that the projections 437 of the button actuators 431432 become engaged in the recess formations 436 of the shuttle. In this position, whilst the user keeps the button actuators depressed, the shuttle cannot be moved from its located position. This is important because the paddle 402d is now caused to move to an open position in which the slot 404 defined by the spacing between the edges 402a 402b of the paddles is large enough for the diameter of the safety line to pass through. The arrangement ensures that the paddle 402d can only be opened to accommodate the insertion of the safety line when the shuttle 415 is correctly located in the correct defined receiving position. The risk of the safety line being received into the traveller but incorrectly located on one side or the other of the shuttle 415 is therefore ameliorated.

In the normal, closed position before and after receiving the safety line into the traveller 401, the paddle 402c 402d are in the position shown in FIG. 22. in this situation, when in use, the paddles are free to pivotally re-orientate about the pivot fixings 42642, in a similar manner to the earlier described embodiments, to best accommodate passage through the safety line intermediate supports, the paddle. In this respect it should be remembered that in use the paddles can only pivot upwardly from the normal position in response to operating forces. Gravity (or other biasing means) normally biases the paddles to the ‘normal’ position shown in FIG. 22. In this embodiment paddle 402d is prevented from rotating on the pivot fixing 427 (counter clockwise as shown in the view of FIG. 22) to an open position, by means of two spaced upstanding projections 402g which abut against the forward edges 431a 432a of a respective actuator button 431432.

The button actuators at their forward edge 431a 432a are provided with respective slots 445 spaced outwardly of the spring receiving cavities 451 of the button actuators 431432. The upper traveller body 402e is provided with correspondingly aligned slots 449. When the button actuators 431432 are not pushed fully in, the slots 445 do not align up with the slots 449 in the upper body an the upstanding projections 402g and the paddle 402d is thereby prevented from rotating on the pivot fixing 427 (counter clockwise as shown in the view of FIG. 22) to an open position, because the two spaced upstanding projections 402g abutting against the forward edges 431a 432a of a respective actuator button 431432.

However, when the button actuators 431432 are pushed fully in, the slots 445 align with the slots 449 in the upper body and the upstanding projections 402g. This permits the paddle 402d to rotate counter-clockwise (arrow X in FIG. 22) to the fully open position as shown in FIG. 24. In constructed embodiments it has been found that paddle rotation of approximately 15 degrees has been sufficient to open the gap 404 (defined by the spacing between the edges 402a 402b of the paddles) the required degree to permit the safety line to be loaded. In the fully open position the paddle 402d abuts against the body 402e to prevent over opening of the gap 404. Once the safety line is loaded into the shuttle, the paddle 402d can be reverted to the closed, normal, position (i.e. back to the position of FIG. 22). Releasing pressure on the button actuators 431432 causes the springs 433434 to move the actuator buttons outwardly to return to their ‘home’ position in which the slots 445 do not align up with the slots 449 in the upper body and the upstanding projections 402g and the paddle 402d is thereby prevented from rotating counter-clockwise on the pivot fixing 427 to the open position.

In certain embodiments, the paddle 402d may be caused to return from the open position to the closed position automatically as the actuator buttons 431432 move outwardly to return to their ‘home’ position. This may be achieved for example by having co-acting inclined surfaces 445a on the slots 445 of the button actuators for engagement with the projections 402g of the paddle 402d. As the actuator buttons 431432 move outwardly to return to their ‘home’ position the inclined surface 445a acts against the projections 402g of the paddle 402d to urge the paddle from the position shown in FIG. 25 to the position shown in FIG. 27.

A further embodiment of a traveller 501 in accordance with a preferred realisation of the invention is shown in FIGS. 29 to 37. In this embodiment a shuttle 515 operable in the same manner as the previously described embodiments is provided and the slot is defined between re-orientatable paddles 502c 502d. In this instance the paddles are not pivotally mounted, so as to re-orientate by means of pivotal movement, but rather slide bodily to lift upwardly and fall downwardly with respect to the main traveller body 502e between a lowered position and a lifted position as the traveller 501 passes a respective intermediate support.

As shown in FIG. 32, the shuttle 515 is located centrally over the slot 504 as it passes the intermediate support 6 such that the narrow section 8 can move through the slot 504. This is because the traveller 501 is in its neutral position as it is dragged past the support 6, in which the traveller is orientated horizontally (i.e. the slot is horizontal). In a ‘normal’ configuration as shown in FIG. 29, the paddles 502c 502d are arranged to be orientated under gravity to rest in their lowered position (corresponding to the position shown in FIG. 29). In this orientation the slot 504 between edges 502a 502b is sufficiently large to allow the narrow section 8 to pass through the gap as the traveller moves past the intermediate support.

As shown in FIG. 33, if the traveller 501 is dragged past the intermediate support 6 in circumstances in which the lanyard is pulling downwardly on the arm 511 (arrow A), the traveller rotates such that the slot 508 is no longer orientated horizontally. As a result, the shuttle 515 becomes re-orientated by moving upwardly and to the left in the figure to its extreme left position. Simultaneously, when approaching the support 6, the paddle 502d becomes re-orientated, being lifted upwardly from its lowered at rest position as a result of contact between surface 502j and the leading edge of the narrow section 8 of the support, so as to displace the paddle 502d upwardly toward the shuttle 515. This permits the narrow part 8 of the intermediate support 6 to pass through the re configured slot 504.

FIG. 34 shows the reverse situation in which the traveller 501 is dragged past the intermediate support 6 in circumstances in which the lanyard is pulling upwardly on the arm 511 (arrow B). The shuttle 515 becomes re-orientated, by moving upwardly and to the right in the figure to its extreme right position. Simultaneously, when approaching the support 6, the paddle 502c becomes re-orientated, being lifted upwardly from its lowered at rest position as a result of contact between surface 502h and the leading edge of the narrow section 8 of the support, so as to displace the paddle 502c upwardly toward the shuttle 515. This permits the narrow part 8 of the intermediate support 6 to pass through the re configured slot 504.

The combined use of the re-orientatable paddles to define the slot and the shuttle 315 provides maximum benefits in terms of use. Paddles that can slide to lift and fall bodily with respect to the traveller body rather than being pivotally mounted are believed to improve robustness and be less likely to fail in the event of a fall.

The shuttle 515 is attached to the load arm 511, such that as the shuttle 315 moves across the slot, then so too does the arm 511. The load arm 51 is however rotatable through fully 360 degrees with respect to the shuttle 515 and therefore also rotatable with respect to the main traveller body 502e. A mounting spindle 517 comprising the shuttle passes through a circular aperture 519 in the arm 511. The spindle 519 is provided with a cap 520. The slider pin 516 passes through the spindle 519. The rotary mounting of the arm 511 with respect to the shuttle 515 and the main traveller body 502e enables the arm 511 to be used on either opposed side of the safety line. It should be noted that, in the embodiment shown, the arm 511 has a karabiner attachment bracket 510, which is positioned outwardly and downwardly from the traveller to a degree to cross the level of the safety line. This ensures that when the traveller is in use the load arm 511, when rotated, will only do so until it clashes with the safety line or intermediate support. The arm therefore extends outwardly and in a transverse direction to pass across the level of the safety line position in the traveller 501.

In this embodiment, the shuttle 515 is mounted to the upper traveller body 502e by means of a slider pin 516 extending across the traveller upper body 502e. The shuttle 515 is provided with a channel through which the slider pin 516 extends such that the shuttle can slide across the body from one extreme position to another (the opposed extreme shuttle positions are shown in FIGS. 30 and 31 respectively). The slot 504 is defined between the edges 502a 502b of the paddles 502c 502d, which are both slidably mounted with respect to the upper traveller body 502e.

The paddles 502c 502d are both slidably mounted with respect to the upper traveller body 502e in respective guide channels in the main traveller body 502e. The paddles slide in a transverse direction to the direction of movement of the shuttle with respect to the main traveller body 502. An exemplary paddle 502d is shown in FIG. 38. Each paddle has a stem portion 502f 502g which is constrained to move upwardly and downwardly in the guide channel in the main traveller body 502e, and a transverse portion 502l 502m which extends away from the respective stem portion terminating at the paddle tips 502a 502b which are spaced to define the slot 504 between the paddle elements. The stem portions 502f 502g of the paddles are each provided with an upwardly orientated slot 571 through which the slider pin 516 passes. In the lowered position resting under gravity, both of the paddle elements 502c 502d are at rest suspended from the slider pin 16, and prevented from becoming separated from the main traveller body by the slider pin 516 passing through the slot 571 in the stem portion of the respective paddles 502c 502d. This position is shown in FIG. 29.

The ‘in operation’ upward limit of sliding movement of paddle 502d is defined by an abutment shoulder 573 carried by the main traveller body 502e. The paddle 502d abutting the shoulder 573 in the uppermost operational position of the paddle 502d is shown in FIG. 31. In this position the upper surface of the stem portion 502g of the paddle 502d lies flush with the upper surface of the main traveller body 502c and abuts against the underside surface of the lower arm element 511a.

The ‘in operation’ upward limit of sliding movement of paddle 502c is defined by the position in which the upper surface of the stem portion 502f of the paddle 502c lies flush with the upper surface of the main traveller body 502e and abuts against the underside surface of the lower arm element 511a. The paddle 502c abutting the underside surface of the lower arm element 511a in the uppermost operational position of the paddle 502c is shown in FIG. 30.

In all the operational positions of the shuttle 515 and paddles 502c 502d when the karabiner is attached to the attachment 510, the slot gap 504 between the edges of the paddles 502c 502d is maintained sufficiently small that the safety line to which the traveller is secured cannot pass out of the traveller body 502.

In order to permit the traveller 501 to be secured to the safety line or removed from the safety line, the components of the traveller 501 must be configured in a specific orientation in order to enable the paddle 502c to be raised to a line-mounting/de-mounting position, which is raised above its ‘in operation’ upward limit. This position is shown in FIG. 37, in which the safety line can pass through the expanded gap 504 between the paddle 502c 502d edges into or out of the shuttle 515. An advantageous feature of the arrangement is that in the line loading position, the karabiner cannot be secured to the arm attachment 510. Conversely, the arrangement cannot be configured for line loading or unloading whilst the karabiner remains attached to the attachment bracket 510.

In order to achieve this the lower arm element 511a is provided with an attachment bracket 510a which is slidable linearly with respect to the upper arm element 511 (and bracket portion 510) between a position in which karabiner receiving apertures 581 on the attachment brackets 510a 510 are coaxially aligned (FIGS. 35 and 39) and a position in which the karabiner receiving apertures on the attachment brackets 510a 510 are in maximum mis-alignment (FIG. 36). An elongate slot is provided in the lower arm element 511 to permit sliding relative to the upper arm element 511 and also the shuttle 515. As shown in FIG. 39 the inner attachment bracket 510a is nested within the outer attachment bracket 510, each generally being ‘U’ shaped in configuration.

In order to configure the device in the safety line-mounting/de-mounting position, the lower arm 511a must first be moved to the position in which the karabiner receiving apertures on the attachment brackets 510a 510 are in maximum mis-alignment (FIG. 36). In this position, the slot in the lower arm 511a directly overlies the guide channel in the traveller main body 502e, which guides the stem 502f of the paddle 502c. In this position the slot in the lower arm 511a additionally lies directly under an aperture 576 in the upper arm 511. The slot in the lower arm 511a and the aperture 576 in the upper arm 511 are both shaped and dimensioned so as to permit the stem 502f of the paddle 502c to pass upwardly through the arms 511 and 511a, to the raised line-mounting/de-mounting position which is lifted above the ‘in operation’ upward limit of the paddle 502c. This position is shown in FIG. 37. It should be noted that in the raised line-mounting/de-mounting position shown in FIG. 37, the paddle 502c abuts against a shoulder 579 provided on the traveller main body 502e. The shoulder 579 is provided at a raised level with respect to the shoulder 573. Also, the paddle 502c is provided with an aperture 580 configured to accommodate a peripheral edge of the shuttle 515 enabling the paddle 502c to be raised to the raised line-mounting/de-mounting position.

As mentioned earlier, an advantage of this embodiment of the invention is that the paddles are not pivotally mounted, which reduces components and also improves robustness of construction. Additionally, the traveller can only be configured in the raised line-mounting/de-mounting position when the attachment brackets 510a 510 are in maximum mis-alignment (FIG. 36). This means that the traveller cannot be de-mounted from the line when the karabiner is attached. A further advantage of the arrangement is that the safety line can only be correctly inserted into the receiving saddle of the shuttle 515 and cannot be inserted in error into another portion of the internal cavity of the traveller body 502. This is because access to other portions the internal cavity of the traveller body 502 is obscured by the position of the shuttle 515 and paddles 502c 502d when orientated in the mounting/de-mounting position.

Effectively, the slot 504 is re-configurable between an open condition in which the slot dimension is of a first size for enabling mounting/de-mounting with respect to a safety line; and a closed condition, locked by the lower arm 511a, in which the slot 504 remains, but at a smaller size to ensure the traveller remains mounted on the safety line. In the closed condition the opposed slot edges are still moveable freely movable relative to one another to reconfigure the slot giving the improved flexibility to pass the safety line intermediate supports. However the range of slot sizes over the range of slot edge movement in the closed condition is such that the traveller cannot disengage from the safety line via the slot 504.

The traveller of the invention can be used effectively with standard types of intermediate support currently in use. No special deflectors or modifications need to be made to existing standard types of intermediate support.

Claims

1. A traveller for a safety line of a fall arrest system, the traveller comprising: a pair of elements that define a slot therebetween, the slot extending to an exterior of the traveller; anda safety line locating shuttle provided on-board the traveller spaced from the slot with a receiving recess or seat that faces the slot and that is configured to receive the safety line, wherein the shuttle is configured to move relative to the pair of elements along a predetermined path in a direction across the slot,wherein the safety line locating shuttle is configured to locate the safety line between the seat and the slot.

2. A traveller according to claim 1, wherein: the slot is defined between inner facing slot edges of the pair of elements, wherein the pair of elements are configured to move relative to one another in order to reconfigure the slot.

3. A traveller according to claim 2, wherein: the traveler has a first configuration where the pair of elements are positioned such that the slot has an open condition in which the slot has a first size that allows the safety line to pass through the slot, and the traveler has a second configuration where the pair of elements are positioned such that the slot has a closed condition in which the slot has a smaller second size that does not allow the safety line to pass through the slot.

4. A traveller according to claim 2, wherein: the pair of elements pivot about two independent axes spaced apart from one another in order to reconfigure the slot.

5. A traveller according to claim 4, wherein: the two independent axes are parallel to each other; andthe shuttle translates relative to the pair of elements along a third direction traverse to the directions of the two independent axes.

6. A traveller for a safety line of a fall arrest system, the traveller comprising: a pair of opposed elements having inner facing slot edges that define a slot therebetween, the slot extending from the inner facing slot edges to an exterior of the traveller; anda safety line locating shuttle provided on-board the traveller spaced from the slot with a receiving recess or seat that faces the slot and that is configured to receive the safety line, wherein the shuttle is configured to move relative to and between the pair of elements,wherein the safety line locating shuttle is configured to locate the safety line between the seat and the slot, andwherein the pair of elements are configured to pivot about two independent axes spaced apart from one another to reconfigure the slot.

7. A traveller according to claim 6, wherein: the traveler has a first configuration where the pair of elements are positioned such that the slot has an open condition in which the slot has a first size that allows the safety line to pass through the slot, and the traveler has a second configuration where the pair of elements are positioned such that the slot has a closed condition in which the slot has a smaller second size that does not allow the safety line to pass through the slot.

8. A traveller according to claim 6, wherein: the two independent axes extend parallel to one another; andthe shuttle translates relative to the pair of elements along a third direction traverse to the first and second directions.