GB2370312A - Attachment device for a safety line - Google Patents
Attachment device for a safety line Download PDFInfo
- Publication number
- GB2370312A GB2370312A GB0029042A GB0029042A GB2370312A GB 2370312 A GB2370312 A GB 2370312A GB 0029042 A GB0029042 A GB 0029042A GB 0029042 A GB0029042 A GB 0029042A GB 2370312 A GB2370312 A GB 2370312A
- Authority
- GB
- United Kingdom
- Prior art keywords
- components
- relative displacement
- attachment device
- cable
- rotation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000006073 displacement reaction Methods 0.000 claims abstract description 40
- 238000000926 separation method Methods 0.000 claims abstract description 6
- 230000000694 effects Effects 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920001084 poly(chloroprene) Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B35/00—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion
- A62B35/0081—Equipment which can travel along the length of a lifeline, e.g. travelers
- A62B35/0087—Arrangements for bypassing lifeline supports without lanyard disconnection
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B35/00—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion
- A62B35/0043—Lifelines, lanyards, and anchors therefore
- A62B35/0056—Horizontal lifelines
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Emergency Lowering Means (AREA)
Abstract
A demountable attachment device is provided for slidably securing a safety line (4) to a generally horizontal lifeline cable (6) or the like provided on a structure (8) .The device comprises first and second components (10 and 12, respectively) secured for relative rotation about an axis of rotation (16) and for relative displacement along the axis of rotation (16). The first and second components (10 and 12) have cooperating jaw-like portions (18 and 20, respectively) for providing sliding engagement with the cable (6) and cooperating apertured portions (22 and 24, respectively)for receiving an attachment hook (30) associated with the safety line (4). Means (32, 34) is provided to permit relative rotation between the first and second components (10 and 12) in a first position of relative displacement along the axis to allow separation of the jaw-like portions for engagement with, or disengagement from, the cable (6), and to prevent relative rotation in a second position of relative displacement along the axis. Locking means (26, 28, 30) is also provided to prevent relative displacement of the first and second components from the said second position.
Description
ATTACHMENT DEVICE FOR A SAFETY LINE
The present invention relates to an attachment device for a safety line, and more particularly to an attachment device for slidably securing a safety line to a generally horizontal lifeline cable provided on a structure, such as a building.
Horizontal lifeline cable systems are known in which a cable is secured generally horizontally to a structure, such as a building, at a high level thereof and arranged to provide protection against falling for people working on the structure. Such people wear a harness to which one end of a safety line is secured, the other end being slidably secured, by means of an attachment device, to the horizontal lifeline cable.
The attachment device must be reliably secured to the horizontal lifeline cable and must be capable of sliding along the cable to follow movement of a person whose safety line is attached thereto.
It is known to provide an attachment device which is demountable on the cable and which incorporates a latching arrangement to prevent accidental removal or dislodging of the device from the cable, which latching
arrangement relies solely on a hook, such as a karabiner hook, connecting a safety line thereto, for its security.
It is an object of the present invention to provide an attachment device which is demountable on a generally horizontal lifeline cable and which incorporates one or more improved safety features.
According to the present invention there is provided a demountable attachment device suitable for slidably securing a safety line to a generally horizontal lifeline cable or the like provided on a structure, the device comprising: first and second components secured for relative rotation about an axis of rotation and for relative displacement along the axis of rotation, the first and second components having cooperating jaw-like portions for providing sliding engagement with the cable, and cooperating apertured portions for receiving an attachment hook associated with the safety line; means to permit relative rotation between the first and second components in a first position of relative displacement thereof, to effect separation of the jaw-like portions for engagement with, or disengagement from, the cable or the like, and to prevent relative rotation between the first and second components in a second position of relative displacement thereof, to prevent separation of
the jaw-like portions ; and locking means operable to prevent relative displacement of the first and second components from the second position of relative displacement to the first position of relative displacement.
The cooperating apertured portions of the first and second components may each be of flange-like form.
The means to permit relative rotation between the first and second components in the first position of relative displacement thereof and to prevent relative rotation between the first and second components in the second position of relative displacement thereof may comprise cooperating regions of the first and second components, which regions engage one another in the second position of relative displacement, to prevent relative rotation between the first and second components, and disengage one another in the first position of relative displacement, to permit relative rotation between the first and second components.
The locking means operable to prevent relative displacement of the first and second components from the second position of relative displacement to the first position of relative displacement may comprise the
attachment hook associated with the safety line, the attachment hook passing through aligned apertures in the apertured portions of the first and second components, such apertures being in alignment only in the second position of relative displacement of the first and second components.
The attachment hook associated with the safety line may be a latchable or lockable hook and may be a karabiner hook.
The safety line may be adapted and arranged for securing to a person to be protected from falling.
The cooperating jaw-like portions may be adapted and arranged whereby when in an unseparated position in engagement with the cable, a gap exists therebetween having a width which is sufficient to permit the attachment device to traverse a support bracket for the cable but insufficient to permit passage therethrough of the cable. The cooperating jaw-like portions may be profiled near the region of the gap therebetween whereby automatic alignment with the support bracket for traversal thereof is effected.
The first and second components may be mounted on a pin, such as of stainless steel, the pin forming the axis of rotation about which the relative rotation of the first and second components is effected and along which the relative displacement of the first and second components is effected.
The first and second components may be of cast form and may comprise stainless steel.
The generally horizontal lifeline cable may comprise stainless steel wires or a bundle of synthetic plastics fibres, such as polyester fibres, which may be enclosed in a jacket, such as of neoprene.
The structure may be a building.
The attachment device of the invention provides very secure and reliable slidable attachment, to a generally horizontal lifeline cable or the like, of a safety line secured to a person working at a high level on a structure, such as a building. The first and second components of the device are relatively displaced along the axis of rotation into the first position of displacement. This allows relative rotation of the jawlike portions such that they can be separated, located
around the cable, then brought together again. The first and second components are then relatively displaced along the axis of rotation into the second position of displacement where they are prevented from relative rotation. The jaw-like portions are therefore prevented from being separated in this position. In this position the apertures in the apertured portions of the first and second components come into alignment, permitting the attachment hook, associated with the safety line from the person, to be secured through them and preventing further relative displacement between the first and second components along the axis of rotation. The process is reversed when it is required to remove the attachment device from the cable or the like.
For a better understanding of the invention and to show more clearly how it may be carried into effect, reference will now be made, by way of example, to the accompanying drawings in which:
Figure 1 is a perspective view from a first side of an embodiment of an attachment device according to the present invention;
Figure 2 is a perspective view from a second side of the attachment device of Figure 1;
Figure 3 is a view from a first side of the attachment device of Figure 1 with first and second components thereof secured against relative rotation;
Figure 4 is a view from a second side of the attachment device of Figure 3;
Figure 5 is a view from a first side of the attachment device of Figure 1 with first and second components thereof arranged for relative rotation;
Figure 6 is a view from a second side of the attachment device of Figure 5; and
Figure 7 is a perspective view of the attachment device of Figure 1 showing separated jaw-like portions of first and second components thereof.
Referring to Figures 1 and 2, an attachment device 2 is provided for slidably securing a safety line 4 to a generally horizontal lifeline cable 6 provided on a structure 8, such as a building. The safety line 4 is arranged to be secured to a person (not shown) who is to be protected from falling from the structure 8.
The attachment device 2 comprises first and second components 10, 12 which are secured for sliding and rotating on a pin 14, suitably of stainless steel, and are arranged for relative rotation about an axis of rotation 16 and for displacement relative to one another along the axis of rotation 16.
The first and second components 10, 12 suitably comprise stainless steel castings and have cooperating jaw-like portions 18,20 for encircling, and providing sliding engagement with, the cable 6.
The cable 6 may comprise stainless steel wires. However the cable 6 may advantageously comprise a bundle of synthetic plastics fibres, such as polyester fibres, which may be enclosed in a jacket, such as of neoprene.
The first and second components 10,12 also have cooperating flange-like portions 22,24 having apertures 26,28. These apertures 26,28 are alignable to receive an attachment hook 30, such as a karabiner hook, for securing the safety line 4 to the attachment device 2.
The hook 30 incorporates a locking means 30A.
When the first and second components 10,12 are in a position of sliding displacement relative to each other
along the pin 14 as shown in Figures 1 and 2 and also shown in Figures 3 and 4, relative rotation between the first and second components 10,12 is prevented by engagement of a stepped region 32 of the second component 12 with a region 34 of the first component 10. In this position the jaw-like portions 18,20 cannot be separated and the attachment device 2 is therefore securely engaged with the cable 6 and can be slid along the cable 6 as required. Removal of the attachment device 2 from the cable requires relative lateral displacement of the components 10,12 along the axis of rotation 16, in order to disengage the regions 32 and 34 from one another and permit relative rotation of the components 10,12 to separate the jaw-like portions 18,20. This is not possible while the attachment hook 30 is secured through the aligned apertures 26,28.
Referring now to Figures 5 and 6, the attachment hook 30 has been removed from the aligned apertures 26,28 and the first and second components 10,12 have been displaced relative to one another along the axis of rotation 16 thereby disengaging the regions 32 and 34 from one another. It will be noted that in this position it is not possible to insert the attachment hook 30 (Figure 1) through the apertures 26,28 because of the misalignment thereof.
As shown in Figure 7, the first and second components 10, 12 can now be rotated relative to one another on the pin 14, about the axis of rotation 16, to effect separation of the jaw-like portions 18,20. This permits the attachment device 2 to be removed from, or fitted to, the cable 6 (shown in Figures 1 and 2).
For fitting the attachment device 2 to the cable 6 and for removing of the attachment device 2 from the cable 6 the attachment hook 30 must therefore always be removed from its location through the apertures 26,28. Once removed, the first and second components 10,12 can be relatively displaced along the axis of rotation 16 to disengage the regions 32 and 34 from one another and permit relative rotation of the components 10,12 to separate the jaw-like portions 18,20 and allow the attachment device 2 to be fitted to, or removed from, the cable 6.
In the case of fitting of the attachment device to the cable 6, the first and second components 10,12 are then rotated relative to one another to close the jaw-like portions 18,20 around the cable 6. The components 10, 12 are then displaced relative to one another along the axis of rotation 16 until the regions 32,34 come into engagement and the apertures 26,28 come into alignment.
The attachment hook 30 is then secured through the apertures 26, 28 to effect locking of the attachment device 2.
It is arranged that when the attachment device 2 is slidably secured to the cable 6, as shown in Figure 1, a gap 36 remains between the jaw-like portions 18,20.
This gap is much smaller in width than the diameter of the cable 6 but is of sufficient width to permit the attachment device 2 to traverse a support bracket (not shown) which may be provided for the cable 6. The jawlike portions 18,20 may also have profiles 38,40 near the region of the gap 36 whereby the attachment device 2 automatically aligns itself with such a support bracket for traversal thereof.
Claims (11)
1. A demountable attachment device suitable for slidably securing a safety line to a generally horizontal lifeline cable or the like provided on a structure, the device comprising: first and second components secured for relative rotation about an axis of rotation and for relative displacement along the axis of rotation, the first and second components having cooperating jaw-like portions for providing sliding engagement with the cable, and cooperating apertured portions for receiving an attachment hook associated with the safety line ; means to permit relative rotation between the first and second components in a first position of relative displacement thereof, to effect separation of the jaw-like portions for engagement with, or disengagement from, the cable or the like, and to prevent relative rotation between the first and second components in a second position of relative displacement thereof, to prevent separation of the jaw-like portions ; and locking means operable to prevent relative displacement of the first and second components from the second position of relative displacement to the first position of relative displacement.
2. An attachment device as claimed in claim 1, wherein the cooperating apertured portions of the first and second components are each of flange-like form.
3. An attachment device as claimed in claim 1 or 2, wherein the means to permit relative rotation between the first and second components in the first position of relative displacement thereof and to prevent relative rotation between the first and second components in the second position of relative displacement thereof comprises cooperating regions of the first and second components, which regions engage one another in the second position of relative displacement, to prevent relative rotation between the first and second components, and disengage one another in the first position of relative displacement, to permit relative rotation between the first and second components.
4. An attachment device as claimed in any preceding claim, wherein the locking means operable to prevent relative displacement of the first and second components from the second position of relative displacement to the first position of relative displacement comprises the attachment hook associated with the safety line, the attachment hook passing through aligned apertures in the apertured portions of the first and second components,
such apertures being in alignment only in the second position of relative displacement of the first and second components.
5. An attachment device as claimed in any preceding claim, wherein the attachment hook associated with the safety line is a latchable or lockable hook.
6. An attachment device as claimed in claim 5, wherein the attachment hook is a karabiner hook.
7. An attachment device as claimed in any preceding claim, wherein the cooperating jaw-like portions are adapted and arranged whereby, when in an unseparated position in engagement with the cable, a gap exists therebetween having a width which is sufficient to permit the attachment device to traverse a support bracket for the cable but insufficient to permit passage therethrough of the cable.
8. An attachment device as claimed in claim 7, wherein the cooperating jaw-like portions are profiled near the region of the gap therebetween whereby automatic alignment with the support bracket for traversal thereof is effected.
9. An attachment device as claimed in any preceding claim, wherein the first and second components are mounted on a pin, the pin forming the axis of rotation about which the relative rotation of the first and second components is effected and along which the relative displacement of the first and second components is effected.
10. An attachment device as claimed in any preceding claim, wherein the first and second components are of cast form.
11. A demountable attachment device substantially as hereinbefore described with reference to, and as shown in, the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0029042A GB2370312B (en) | 2000-11-29 | 2000-11-29 | Attachment device for a safety line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0029042A GB2370312B (en) | 2000-11-29 | 2000-11-29 | Attachment device for a safety line |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0029042D0 GB0029042D0 (en) | 2001-01-10 |
| GB2370312A true GB2370312A (en) | 2002-06-26 |
| GB2370312B GB2370312B (en) | 2003-08-13 |
Family
ID=9904060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0029042A Expired - Fee Related GB2370312B (en) | 2000-11-29 | 2000-11-29 | Attachment device for a safety line |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2370312B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2388148A (en) * | 2002-04-26 | 2003-11-05 | Safeline Uk Ltd | An anchoring device for a safety line in a fall arrest system |
| WO2004075993A1 (en) * | 2003-02-26 | 2004-09-10 | Central (High Rise) Limited | Safety devices |
| WO2005038168A1 (en) * | 2003-10-14 | 2005-04-28 | Poldmaa, Kathleen | Connecting shuttle |
| WO2005058422A1 (en) * | 2003-12-13 | 2005-06-30 | Checkmate Uk Limited | Lifeline trolley |
| GB2420820A (en) * | 2004-12-01 | 2006-06-07 | Harry Crawford | Safety line traveller |
| EP1716889A2 (en) * | 2005-04-27 | 2006-11-02 | Skylotec GmbH | Runner for a fall protection device |
| GB2459654A (en) * | 2008-04-28 | 2009-11-04 | Latchways Plc | Safety line traveller |
| WO2010135088A1 (en) * | 2009-05-20 | 2010-11-25 | Mine Safety Appliances Company | Method, apparatus and arrangement for a lifeline system |
| GB2491808A (en) * | 2011-05-31 | 2012-12-19 | Central High Rise Ltd | Safety clamp which receives safety rail |
| WO2013081464A3 (en) * | 2011-12-02 | 2014-08-07 | Xsplatforms B.V. | Runner for guidance along a guide cable of an anchoring device |
| US20170056692A1 (en) * | 2015-09-02 | 2017-03-02 | Treemagineers Ltd. | Harnesses |
| IT201700024039A1 (en) * | 2017-03-03 | 2018-09-03 | Rotho Blaas Srl | Sliding element for security systems and security system |
| US20210260417A1 (en) * | 2020-02-21 | 2021-08-26 | Arlen Paul Grant | Lifeline Bypass Shuttle |
-
2000
- 2000-11-29 GB GB0029042A patent/GB2370312B/en not_active Expired - Fee Related
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2388148B (en) * | 2002-04-26 | 2005-04-20 | Safeline Uk Ltd | Safety anchor device |
| GB2388148A (en) * | 2002-04-26 | 2003-11-05 | Safeline Uk Ltd | An anchoring device for a safety line in a fall arrest system |
| WO2004075993A1 (en) * | 2003-02-26 | 2004-09-10 | Central (High Rise) Limited | Safety devices |
| WO2005038168A1 (en) * | 2003-10-14 | 2005-04-28 | Poldmaa, Kathleen | Connecting shuttle |
| WO2005058422A1 (en) * | 2003-12-13 | 2005-06-30 | Checkmate Uk Limited | Lifeline trolley |
| GB2420820A (en) * | 2004-12-01 | 2006-06-07 | Harry Crawford | Safety line traveller |
| GB2420820B (en) * | 2004-12-01 | 2010-04-07 | Harry Crawford | Improved attachment device |
| EP1716889A2 (en) * | 2005-04-27 | 2006-11-02 | Skylotec GmbH | Runner for a fall protection device |
| EP1716889A3 (en) * | 2005-04-27 | 2007-07-04 | Skylotec GmbH | Runner for a fall protection device |
| GB2459654B (en) * | 2008-04-28 | 2012-08-08 | Latchways Plc | Safety line traveller |
| GB2459654A (en) * | 2008-04-28 | 2009-11-04 | Latchways Plc | Safety line traveller |
| WO2010135088A1 (en) * | 2009-05-20 | 2010-11-25 | Mine Safety Appliances Company | Method, apparatus and arrangement for a lifeline system |
| CN102596327A (en) * | 2009-05-20 | 2012-07-18 | 矿井安全装置公司 | Method, apparatus, and arrangement for a lifeline system |
| AU2010249942B2 (en) * | 2009-05-20 | 2014-08-07 | Msa Technology, Llc | Method, apparatus and arrangement for a lifeline system |
| CN102596327B (en) * | 2009-05-20 | 2014-08-13 | 矿井安全装置公司 | Method, apparatus, and arrangement for a lifeline system |
| US8869934B2 (en) | 2009-05-20 | 2014-10-28 | Mine Safety Appliances Company, Llc | Method, apparatus, and arrangement for a lifeline system |
| GB2491808A (en) * | 2011-05-31 | 2012-12-19 | Central High Rise Ltd | Safety clamp which receives safety rail |
| WO2013081464A3 (en) * | 2011-12-02 | 2014-08-07 | Xsplatforms B.V. | Runner for guidance along a guide cable of an anchoring device |
| US20170056692A1 (en) * | 2015-09-02 | 2017-03-02 | Treemagineers Ltd. | Harnesses |
| IT201700024039A1 (en) * | 2017-03-03 | 2018-09-03 | Rotho Blaas Srl | Sliding element for security systems and security system |
| EP3369460A1 (en) | 2017-03-03 | 2018-09-05 | Rotho Blaas srl GmbH | Sliding element for security systems and security system |
| US20210260417A1 (en) * | 2020-02-21 | 2021-08-26 | Arlen Paul Grant | Lifeline Bypass Shuttle |
| US11833375B2 (en) * | 2020-02-21 | 2023-12-05 | Engineered Supply | Lifeline bypass shuttle |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0029042D0 (en) | 2001-01-10 |
| GB2370312B (en) | 2003-08-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) |
Free format text: REGISTERED BETWEEN 20130711 AND 20130717 |
|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20171129 |