GB2256408A - Rail trolley for fall arrest equipment. - Google Patents

Rail trolley for fall arrest equipment. Download PDF

Info

Publication number
GB2256408A
GB2256408A GB9111142A GB9111142A GB2256408A GB 2256408 A GB2256408 A GB 2256408A GB 9111142 A GB9111142 A GB 9111142A GB 9111142 A GB9111142 A GB 9111142A GB 2256408 A GB2256408 A GB 2256408A
Authority
GB
United Kingdom
Prior art keywords
rail
trolley
rollers
cam lever
rigid body
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.)
Withdrawn
Application number
GB9111142A
Other versions
GB9111142D0 (en
Inventor
Stephen Griffiths
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
INVETECK PLC
Original Assignee
INVETECK PLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by INVETECK PLC filed Critical INVETECK PLC
Priority to GB9111142A priority Critical patent/GB2256408A/en
Publication of GB9111142D0 publication Critical patent/GB9111142D0/en
Publication of GB2256408A publication Critical patent/GB2256408A/en
Withdrawn legal-status Critical Current

Links

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
    • B23Q1/262—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members with means to adjust the distance between the relatively slidable members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
    • B23Q1/28—Means for securing sliding members in any desired position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/26—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members
    • B23Q1/40—Movable or adjustable work or tool supports characterised by constructional features relating to the co-operation of relatively movable members; Means for preventing relative movement of such members using ball, roller or wheel arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
    • B61B3/00—Elevated railway systems with suspended vehicles
    • B61B3/02—Elevated railway systems with suspended vehicles with self-propelled vehicles
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/18—Devices for preventing persons from falling
    • E06C7/186—Rail or rope for guiding a safety attachment, e.g. a fall arrest system
    • E06C7/187—Guiding rail
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/04—Ball or roller bearings
    • F16C29/045—Ball or roller bearings having rolling elements journaled in one of the moving parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2350/00—Machines or articles related to building

Abstract

A rail trolley has two sets of rotatable, peripherally grooved rollers (20a, 20b), for running on opposite edges respectively of a fixed rail (12) disposed therebetween. One set of rollers (20b) is displaceable, against the bias of springs (28), in a direction away from the other set of rollers (20a), to enable the trolley to be applied to or removed from the rail (12). A cam lever, (32) which carries two friction brake shoes, is arranged on the trolley such that angular displacement of the cam lever (32) causes one of the friction shoes to engage the rail (12) and thereby lock the trolley to the rail (12). The trolley is able to function as a fall arrest device with the rail fixed at any attitude. <IMAGE>

Description

DESCRIPTION RAIL TROLLEY FOR FALL ARREST EOUIPMENT The present invention relates to fall arrest equipment for protecting operatives working in hazardous locations. The invention is concerned in particular with rail trolleys of the type which run on permanently or semi-permanently installed rail systems to provide a free running mobile anchorage for location of fall arrest devices whereby to allow freedom of movement for the operatives whilst retaining fall protection.
Rail trolleys are known which are designed to operate on horizontal rails. Such rails are normally installed approximately at waist height or directly above to provide protection to exposed walkways where regular passage is required to undertake work operations such as building maintenance, vehicle loading or repair, high level painting, split level production lines and like operations. Several users can be connected to the system which can be in a continuous run including around corners and spanning gaps. Other rail trolleys are known which are designed to run on vertical rails, for example when installed on a ladder to provide the user protection by locking onto the rail in the event of a fall.
Other situations may involve rails which run at an angle to the horizontal. However, none of these known trolleys are suited to operate on both horizontal and vertical rails because the functional characteristics of a rail trolley designed for vertical operation are essentially different to those required for horizontal operation.
One object of the present invention is to provide a rail trolley capable of operation on both horizontal and vertical rails, and indeed on rails disposed at any angle between the horizontal and vertical.
Another characteristic of known rail trolleys is that they are limited in the locations at which they can be applied to the rail system. Most existing trolleys must be led onto the rail system either at the end of a rail or in a specially provided break in the rail.
A second object of the present invention is to provide a rail trolley that can be applied to and removed from a rail system at any location within that rail system.
According to a first aspect of the present invention, there is provided a rail trolley having two sets of rotatable, peripherally grooved, rollers, mounted from one side on a rigid body in a cantilevered manner and in spaced parallel planes, for running on opposite edges respectively of a fixed rail which is disposed, in use, therebetween, the rotational axis of one set of the rollers being displaceable, against a spring bias, in a direction away from the other set of rollers, whereby to enable the trolley to be applied to or removed from the rail by displacement of said one set of rollers against the spring bias.
Preferably, each of the rollers in said one set is individually displaceable within slots in the rigid body against its own associated biasing springs.
Normally, there would be two such rollers in each said pair of rollers.
According to a second aspect of the invention, there is pivotably mounted on the rigid body a cam lever whose one end carries two friction brake shoes, the arrangement being such that angular displacement of the cam lever on the rigid body in one direction from a neutral position causes one of said friction shoes to engage the rail and angular displacement of the cam lever in the other direction from the neutral position causes the other of said friction shoes to engage the rail, the cam lever being normally biassed to adopt said neutral position.
Preferably, the pivoting axis of the cam lever lies in a plane which is parallel to the rotational axis of said sets of rollers and midway between the rotational axes of the two rollers in each pair.
Normally the end of the cam lever remote from said friction shoes carries a ring for connection of a cable/line by which the trolley is attached to an operative.
The invention is described further hereinafter, by way of example only, with reference to the accompanying drawings, in which; Fig. 1 is a diagrammatic plan view of one embodiment of a rail trolley in accordance with the present invention (shown mounted on a horizontal rail); Fig. 2 is a section on the line II-II in Fig. 3 (rail not shown); and Fig. 3 is an end view in the direction of the arrow A in Fig. 1 (rail not shown).
The drawings show a rail trolley 10 in accordance with this invention, mounted in an operational position on a rail 12 of T section. In the drawings, the rail 12 extends horizontally. However it could equally well have been shown extending vertically, as will be apparent hereinafter.
The rail trolley 10 comprises an extruded aluminium body 14 which includes a pair of generally U-shaped portions 16a,16b interconnected at one side by an intermediate body portion 18. The U-shaped portions 16a,16b define mutually opposed channels 18a,18b in which respective pairs of rollers 20a,20b are journalled. As shown in Fig. 1, in use, the trolley is mounted on the horizontal rail 12 so that the two rollers 20a engage the top edge 12a of the rail and the two rollers 20b engage the bottom edge 12b of the rail, thereby enabling the trolley to run smoothly along the rail.
As best seen in Figs. 1 and 2, the rollers 20a,20b are constructed such as to have respective annular peripheral grooves, the base of each of which engages the associated top or bottom edge of the rail while the sides of which can engage the opposite side surfaces of the rail 12 for the purpose of lateral guidance. The rollers could each be of unitary construction. However, for ease of manufacture, each roller is preferably made up of several annular bushes and washers of different diameters carried coaxially by a common axle 22 mounted in the trolley body 14.
The latter arrangement also allows for a certain amount of lateral movement of the rollers 20 relative to the trolley body 14.
As best seen in Fig. 1, the two axles 22a of one of the pairs of rollers (rollers 20a) are mounted rigidly in the trolley body 14 by means of respective nuts 24 so that the rotational axes of these rollers are fixed relative to the body 14. On the other hand, the two shafts 22b associated with the other pair of rollers 20b are spring loaded within respective pairs of opposed slots 26 in the side walls of the U-shaped body portion 16b so that they normally adopt the position shown in Fig. 1. However, by virtue of this arrangement, the shafts 22b can be displaced against the force of springs 28 whereby the rollers 20b carried thereby can be correspondingly displaced in a direction away from the fixed rollers 20a sufficient to enable the trolley to be applied to or released from the rail 12. Thus, to release the trolley from the mounted position shown in Fig. 1, it is only necessary to lift the body vertically so that the engagement of the rail 12 with the spring loaded rollers 20b causes these rollers to be displaced downwardly within the slots 26 relative to the body portion 16b. As a result, the top edge 12a of the rail becomes clear of the peripheral grooves in the fixed rollers 20a, thereby enabling the trolley to be pivoted about the points of contact of the rail with the lower rollers 20b whereby the trolley becomes released from the rail. Application of the trolley to the rail is achieved by presenting the trolley to the rail in an inclined attitude so as to reverse the aforegoing steps. The end face 30 of the body portion 16b is preferably chamfered to facilitate the latter action.
It will be appreciated that the abovedescribed construction enables the trolley to be mounted to and removed from any desired position on the rail, irrespective of the attitude of the rail.
The trolley as described thus far would be suitable for use only on a horizontal rail 12. Since, however it is to operate on a rail which may be vertical, or indeed at any angle to the horizontal, then it becomes necessary for it to include a means of locking itself to the rail in the event that an operative, who is attached to the trolley, should fall. For this purpose the presently illustrated embodiment includes a camming arrangement which is normally biassed to an inoperative position but which locks the trolley to the rail in the event of an abnormal load being applied to it, in either direction.
This latter arrangement comprises a cam lever 32 which is pivotally mounted relative to the trolley body 14 on an axle 34. One end of the cam lever 32 extends with clearance through an aperture 36 in the intermediate body portion 18 and defines two pairs of friction shoes 38a,38b, as best seen in Fig. 3. The axis of the axle 34 of the cam lever 32 is disposed in a plane B which lies parallel to the rotational axes of all four rollers 20a,20b and midway between the rotational axes of the two rollers in each pair (see Fig. 2). By virtue of this arrangement, when the trolley is mounted on the rail 12 as shown in Fig. 1 and the cam lever 32 is rotated anticlockwise on the pivot axle 34 (as viewed in Fig. 2) then the friction shoes 38a will engage against the side of the rail 12 and lock the trolley against movement relative to the rail.On the other hand, when the cam lever 32 is rotated clockwise on the pivot axle 34, then the friction shoes 38b will engage against the side of the rail 12 to again lock the trolley against movement relative to the rail. In normal operation, the cam lever is biassed by springs (not shown) into a central position in which neither of the pairs of friction shoes engages the rail. Only when a force in excess of a predetermined level is applied to the cam lever 32 is the biassing force overcome and the abovedescribed pivoting occur to cause locking of the trolley to the rail.
The end of the cam lever 32 remote from the friction shoes carries a ring 40 for attachment of a flexible line/cable connecting the trolley to the operative. In the event that the operative is moving vertically or at an angle to the horizontal, the trolley will be pulled up the correspondingly angled rail 12 via the line/cable. The force necessary to drag the trolley up the rail is insufficient to overcome the biassing force maintaining the cam lever in its central position and so locking of the trolley occurs. However, should the operative fall, the extreme movement applied to the cam lever 32 is sufficient to overcome the round biass and cause the lever 32 to pivot about the axle 34 and lock the trolley to the rail. Since the device works symmetrically, it does not matter which way up it has been fitted to the rail 12 for the latter operation to be achieved. If now the trolley is running on a horizontal rail 12, as in Fig. 1, then the trolley will follow the operative in either direction along the rail without locking since the forces on the cam lever will be insufficient to overcome the spring biass maintaining the cam lever in its central neutral position. Should the operative fall with the trolley attached to a horizontal rail, then the connection of the trolley to the rail will itself act to restrain the fall since the trolley cannot be removed from the rail simply by a downward pull.
Thus the abovedescribed system permits the trolley to be mounted or removed at any location on the rail and enables the trolley to be used on rails which are at any attitude, whether horizontal, vertical or any angle therebetween.

Claims (6)

1. A rail trolley having two sets of rotatable, peripherally grooved rollers, mounted from one side on a rigid body in a cantilevered manner and in spaced parallel planes, for running on opposite edges respectively of a fixed rail which is disposed, in use, therebetween, the rotational axis of one set of the rollers being displaceable, against a spring bias, in a direction away from the other set of rollers, whereby to enable the trolley to be applied to or removed from the rail by displacement of said one set of rollers against the spring bias.
2. A rail trolley as claimed in claim 1, wherein each of the rollers in said one set is individually displaceable within slots in the rigid body against its own associated biasing springs.
3. A rail trolley as claimed in claim 1 or 2, wherein there are two such rollers in each said set of rollers.
4. A rail trolley as claimed in any of claims 1 to 3 wherein there is pivotably mounted on the rigid body a cam lever whose one end carries two friction brake shoes, the arrangement being such that angular displacement of the cam lever on the rigid body in one direction from a neutral position causes one of said friction shoes to engage the rail and angular displacement of the cam lever in the other direction from the neutral position causes the other of said friction shoes to engage the rail, the cam lever being normally biassed to adopt said neutral position.
5. A rail trolley having two sets of rotatable, peripherally grooved rollers, mounted from one side on a rigid body in a cantilevered manner and in spaced parallel planes, for running on opposite edges respectively of a fixed rail which is disposed, in use, therebetween, there being pivotably mounted on the rigid body a cam lever whose one end carries two friction brake shoes, the arrangement being such that angular displacement of the cam lever on the rigid body in one direction from a neutral position causes one of said friction shoes to engage the rail and angular displacement of the cam lever in the other direction from the neutral position causes the other of said friction shoes to engage the rail, the cam lever being normally biassed to adopt said neutral position.
6. A rail trolley substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
GB9111142A 1991-05-23 1991-05-23 Rail trolley for fall arrest equipment. Withdrawn GB2256408A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9111142A GB2256408A (en) 1991-05-23 1991-05-23 Rail trolley for fall arrest equipment.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9111142A GB2256408A (en) 1991-05-23 1991-05-23 Rail trolley for fall arrest equipment.

Publications (2)

Publication Number Publication Date
GB9111142D0 GB9111142D0 (en) 1991-07-17
GB2256408A true GB2256408A (en) 1992-12-09

Family

ID=10695468

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9111142A Withdrawn GB2256408A (en) 1991-05-23 1991-05-23 Rail trolley for fall arrest equipment.

Country Status (1)

Country Link
GB (1) GB2256408A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994015673A2 (en) * 1993-01-07 1994-07-21 Smmart Equipment Inc. Safety trolley restraint system for railroad bridges
EP0855528A1 (en) * 1997-01-22 1998-07-29 RK Rose + Krieger GmbH & Co. KG Verbindungs- und Positioniersysteme Device pushing a roller against a guide rail
DE29719485U1 (en) * 1997-11-03 1999-03-18 Soell Gmbh Fall protection
GB2344610A (en) * 1998-12-07 2000-06-14 Ziet Verder Beheer B V Fall protection system with a trolley contacting dual safety rails
GB2352758A (en) * 1999-07-29 2001-02-07 Nicholas Clive Gaughan Anchor device for safety line, movable along rafter
GB2368878A (en) * 2000-11-14 2002-05-15 Kvaerner Cementation Found Ltd Safety apparatus
GB2373537A (en) * 2001-03-22 2002-09-25 Hadrian Iye Track mounted fall arrest system
US6530454B1 (en) * 1998-10-23 2003-03-11 Latchways Plc Two-way locking device for height safety apparatus
US7992680B2 (en) 2006-07-28 2011-08-09 Small Greg Rigid rail fall protection apparatus having bypassable moveable anchorages
CN104225840A (en) * 2014-09-17 2014-12-24 国网山东省电力公司泰安供电公司 Anti-falling self-locking device
CN107986158A (en) * 2017-11-29 2018-05-04 株洲天桥起重机股份有限公司 A kind of track anti-fall device and its electrolysis copper-lead zinc multifunctional bridge type crane
EP4115954A4 (en) * 2020-03-06 2024-03-20 Tatsuo Ono Slider device and handrail device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106390325A (en) * 2016-10-25 2017-02-15 国动网络通信集团有限公司 Communication iron tower fall-prevention safety device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1290243A (en) * 1969-08-14 1972-09-20
EP0090160A2 (en) * 1982-03-30 1983-10-05 Högg-Handels AG Transporting device
GB2241478A (en) * 1990-03-01 1991-09-04 Norgren Martonair Ltd Guide rail on a gantry loader

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1290243A (en) * 1969-08-14 1972-09-20
EP0090160A2 (en) * 1982-03-30 1983-10-05 Högg-Handels AG Transporting device
GB2241478A (en) * 1990-03-01 1991-09-04 Norgren Martonair Ltd Guide rail on a gantry loader

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994015673A2 (en) * 1993-01-07 1994-07-21 Smmart Equipment Inc. Safety trolley restraint system for railroad bridges
WO1994015673A3 (en) * 1993-01-07 1994-09-01 Smmart Equipment Inc Safety trolley restraint system for railroad bridges
EP0855528A1 (en) * 1997-01-22 1998-07-29 RK Rose + Krieger GmbH & Co. KG Verbindungs- und Positioniersysteme Device pushing a roller against a guide rail
DE29719485U1 (en) * 1997-11-03 1999-03-18 Soell Gmbh Fall protection
US6571912B2 (en) 1997-11-03 2003-06-03 Christian Dalloz Holding Deutschland Gmbh & Co. Kg Falling safeguard device
US6530454B1 (en) * 1998-10-23 2003-03-11 Latchways Plc Two-way locking device for height safety apparatus
GB2344610B (en) * 1998-12-07 2003-01-22 Ziet Verder Beheer B V Fall protection system and trolley for use in such a system
GB2344610A (en) * 1998-12-07 2000-06-14 Ziet Verder Beheer B V Fall protection system with a trolley contacting dual safety rails
GB2352758A (en) * 1999-07-29 2001-02-07 Nicholas Clive Gaughan Anchor device for safety line, movable along rafter
GB2368878A (en) * 2000-11-14 2002-05-15 Kvaerner Cementation Found Ltd Safety apparatus
GB2373537A (en) * 2001-03-22 2002-09-25 Hadrian Iye Track mounted fall arrest system
GB2373537B (en) * 2001-03-22 2005-09-07 Hadrian Iye Improved fall-arrest system for persons working at height
US7992680B2 (en) 2006-07-28 2011-08-09 Small Greg Rigid rail fall protection apparatus having bypassable moveable anchorages
CN104225840A (en) * 2014-09-17 2014-12-24 国网山东省电力公司泰安供电公司 Anti-falling self-locking device
CN107986158A (en) * 2017-11-29 2018-05-04 株洲天桥起重机股份有限公司 A kind of track anti-fall device and its electrolysis copper-lead zinc multifunctional bridge type crane
CN107986158B (en) * 2017-11-29 2019-07-05 株洲天桥起重机股份有限公司 A kind of track anti-fall device and its electrolysis copper-lead zinc multifunctional bridge type crane
EP4115954A4 (en) * 2020-03-06 2024-03-20 Tatsuo Ono Slider device and handrail device

Also Published As

Publication number Publication date
GB9111142D0 (en) 1991-07-17

Similar Documents

Publication Publication Date Title
GB2256408A (en) Rail trolley for fall arrest equipment.
US5845894A (en) Pulley with a pivoting flange and built-in jammer
US5927438A (en) Personnel lifting-lowering system
US4521000A (en) Bypassing double action rope grip
EP2569056B1 (en) Fall protection arrangement
GB2106855A (en) A safety device
CA2347174C (en) Two-way locking device for height safety apparatus
US5927432A (en) Rescue apparatus
EP1234089B1 (en) Catch device for a climbing protection system
CN1197401A (en) Device for automatically stopping fall of personneel working high above ground
GB2143495A (en) Safety device
US4653653A (en) Hoisting systems
CN208150724U (en) Guide tracked fall protection equipment and guide tracked fall arrest protect component
GB2338506A (en) Safety line clamping device
US4181194A (en) Safety clamp device and apparatus utilizing same
CA1306725C (en) Safety attachment systems, and parts and fittings therefor
JP4756252B2 (en) Fall prevention safety device
US3212455A (en) Hoist trolley antitilting means
KR200397104Y1 (en) Device for Prevention Move of Container Crane
JP2888418B2 (en) Lighting equipment lifting device
KR0138259Y1 (en) Safety equipment for iron tower elevator
CN214512371U (en) Diagonal drawer for fire truck and fire truck
CN217139185U (en) Rotary brake assembly for amusement equipment
US4546890A (en) Automatic hoist and traversing apparatus
EP3719340B1 (en) Protection device braking mechanism

Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)