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
  • A62B35/0043—Lifelines, lanyards, and anchors therefore
  • A62B35/0062—Rail-form lifelines for permanent installation
• • 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
  • A62B35/04—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion incorporating energy absorbing means
• • 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

Definitions

• the invention relates to a fall securing device for mounting on an essentially vertical guide rail having opposi- tely directed, longitudinally extending guide flanges, compri ⁇ sing a sliding body having a pair of hook members projecting towards each other from opposite side walls of the sliding body to grip the guide flanges of the rail, and a laterally projecting arm for attachment of a harness or the like, so that traction from the harness in the longitudinal direc ⁇ tion of the rail causes a turning of the sliding body relative to the rail and therewith a braking frictional force between the rail and the side walls of the sliding body.
• Such a fall securing or safety locking device in par- ticular is intended for mounting on vertical escape paths in the form of fire ladders or the like, wherein the guide rail is arranged as, for example, a part of one of the side stringers of the fire ladder.
• a fall securing device of the stated type wherein the sliding body is attached to the guide rail by means of a suitable opening in one of the guide flanges.
• the known ladder is of the folding type and comprises conti ⁇ nuous sections extending consecutively along the stories of the building where the ladder is mounted. For each story a mounting opening is provided in the guide rail and has a width corresponding to the width of the associated sliding body. Each opening is narrower than the opening for the super- jacent story, so that the sliding bodies for all stories will slide over the subjacent openings of the guide rail without being able to loosen through these openings.
• the object of the invention is to provide a fall secu ⁇ ring device which is easy to operate, which has a safe func- tion and which requires an insignificant physical force for mounting, at the same time as it is simple and cheap to manu ⁇ facture.
• Fig. 1 shows a perspective view of a safety device according to the invention
• Fig. 2 shows a cross-section of a ladder having a safety device according to Fig. 1 mounted thereon.
• the safety device includes a sli ⁇ ding body generally designated by the reference numeral 1 , which sliding body comprises an essentially channel-shaped piece of material having a web member 2 and side wall members 3, 4 from which a pair of hook members 5 and 6 project inwards and are intended to grip oppositely directed guide flanges on a guide rail (see Fig. 2).
• the hook member 6 is an integral part of the side wall member 4, whereas the hook member 5 is a separate member which is displaceably mounted in the sliding body 1, so that it can be moved against a spring load in the direction away from the fixed hook member 6.
• the hook member 5 has an essen ⁇ tially L-shaped cross-section and is placed in a laterally and towards the channel member open cavity in the form of a chute 7 in a hook-receiving portion 8 of the sliding body.
• a spring means in the form of e.g. a leaf spring or a helical spring 9 (shown schematically in Fig. 1) is placed between the hook member 5 and the opposite side wall of the chute 7.
• the hook member 5 is prevented from falling out of the chute 7 by means of a sleeve 10 (shown sectioned in the drawing) surrounding the sliding body and the hook member.
• the sliding body 1 consists of a cut length of an extruded piece of material which is adapted to receive a suitably dimensioned sleeve 10 in the form of a bit of a square tube. This represents a structure which is very simple and cheap to manufacture.
• the sleeve 10 is fixed in a suitable manner to the sliding body 1, e.g. in that the sleeve by means of a suitable tool is locally pressed into the sliding body.
• the displaceable hook member 5 has an outwards facing, bevelled surface portion 13 which, when mounting the sliding body on the associated guide rail, is brought into abutment against and forced against the associated guide flange on the guide rail, so that the hook member is pushed aside and enables introduction of the guide flange.
• the sliding body 1 also includes an arm 14 projecting laterally from the sliding body on the opposite side of the hook-member receiving portion 8 in relation to the channel portion 2, 3, 4.
• the arm 14 is provided with a hole 15 for attachment of a harness or the like which can be attached to the person which is to use the fall securing device in connection with the circumstance that the person is to descend a ladder with associated guide rail for the safety device (see Fig. 2).
• a harness or the like which can be attached to the person which is to use the fall securing device in connection with the circumstance that the person is to descend a ladder with associated guide rail for the safety device (see Fig. 2).
• the sliding body will fall downwards by itself, the channel member sliding along the guide rail with a suitable, small friction.
• Fig. 2 the safety device is shown to be mounted on a ladder 16 which is of the folding type and includes a number of fastening brackets 17, an inner stringer 18, an outer stringer 19 and a number of rungs 20 which are pivo ⁇ tally mounted between the stringers by means of bolts 21, 22.
• the outer stringer 19 is formed with a guide rail 23 with oppositely directed guide flanges 24, 25.
• the hook member 6 of the sliding body 1 is initially hooked onto the guide flange 25. Thereafter the displaceable hook member 5 is knoc ⁇ ked or forced against the opposite guide flange 24 of the rail, so that the hook member is displaced laterally and the rail is inserted into and retained in the sliding body.
• the arm 14 forms a moment arm, so that, with a suitable length of the arm 14, a minimum physical force is required to place or mount the sliding body on the rail. Further, it is clear that the sliding body by means of the moveable hook member can be mounted at any place on the rail, so that safe, simple and quick mounting is ensured.

Landscapes

• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Business, Economics & Management (AREA)
• Emergency Management (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Ladders (AREA)
• Details Of Aerials (AREA)
• Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
• Laying Of Electric Cables Or Lines Outside (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=19888743

Family Applications (1)

Country Status (5)

Families Citing this family (3)

Family Cites Families (3)

• 1986
  • 1986-02-14 NO NO86860544A patent/NO158282C/no unknown
• 1987
  • 1987-02-13 EP EP87901137A patent/EP0258307A1/en not_active Withdrawn
  • 1987-02-13 WO PCT/NO1987/000013 patent/WO1987005072A1/en not_active Ceased
  • 1987-10-13 FI FI874509A patent/FI874509A0/fi not_active Application Discontinuation
  • 1987-10-13 DK DK534687A patent/DK534687A/da not_active Application Discontinuation

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events