Classifications

• • A—HUMAN NECESSITIES
  • A62—LIFE-SAVING; FIRE-FIGHTING
  • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
  • A62B1/00—Devices for lowering persons from buildings or the like
  • A62B1/06—Devices for lowering persons from buildings or the like by making use of rope-lowering devices
  • A62B1/14—Devices for lowering persons from buildings or the like by making use of rope-lowering devices with brakes sliding on the rope
• • A—HUMAN NECESSITIES
  • A62—LIFE-SAVING; FIRE-FIGHTING
  • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
  • A62B1/00—Devices for lowering persons from buildings or the like
  • A62B1/06—Devices for lowering persons from buildings or the like by making use of rope-lowering devices
  • A62B1/08—Devices for lowering persons from buildings or the like by making use of rope-lowering devices with brake mechanisms for the winches or pulleys
  • A62B1/10—Devices for lowering persons from buildings or the like by making use of rope-lowering devices with brake mechanisms for the winches or pulleys mechanically operated

Definitions

• the invention relates to a safety device for climber secured by a rope.
• a fall protection device for climber secured by a rope comprises a frame, a casing pivotally mounted on the frame, a pulley pivotally mounted in the casing with the same axis of pivoting as the casing, the pulley being rotated by the rope and having locking means adapted to block the rotation of the pulley relative to the housing when the speed of rotation of the pulley exceeds a predetermined speed, the housing carrying a movable stop capable, in cooperation with a stop fixed chassis, to ensure a pinch of the rope to llein the movement of the rope.
• a disadvantage of devices of this type is that it is necessary to tension the soft strand of the rope, that is to say the strand not bound to the climber.
• An object of the invention is to avoid the aforementioned drawback and increase the safety of the climber during ascent and during descent.
• the invention relates to a safety device, for climber secured by a rope, comprising a frame, a casing pivotally mounted on the frame, a pulley pivotally mounted in the housing with the same pivot axis as the casing, the pulley being driven in rotation by the rope and comprising locking means adapted to block the rotation of the pulley relative to the housing when the speed of rotation of the pulley exceeds a predetermined speed .
• the housing carrying a movable stop capable, in cooperation with a fixed stop of the chassis, to ensure a pinching of the rope to block the movement of the rope in case of fall of the climber.
• said ovoid piece tilts between a first position in contact with a first stop when the rope is raised by traction on the soft strand, and a second position in contact with a second stop in case of fall of the climber.
• said first and third stops are fixed.
• said second stop is adjustable to control the more or less strong nip of the rope between the oval piece and the third stop.
• said second stop has a cam profile, the adjustment of the second position of the ovoid piece being ensured by rotation of the second stop.
• said second stop is adjustable in position by translation.
• the housing has at its periphery arcuate oblong slots, cooperating with spacers carried by the frame, to ensure the pivoting of the housing.
• FIG. 1 is a simplified schematic view of a safety device for climber secured by a rope, according to a first embodiment of the invention
• - Figure 2 is a view similar to Figure 1, a safety device for climber secured by a rope, according to a second embodiment of the invention.
• the exemplary safety device comprises, in a first embodiment (FIG. 1), a frame consisting of two flanges 1 parallel to each other, held at a fixed distance from one another by means of spacers. such as 2, 3. Between the two flanges 1 are arranged on the one hand, a housing 4, on the other hand an ovoid part 5.
• the housing 4 is pivotally mounted about an axis 6 perpendicular to the flanges 1. On its periphery, the housing 4 has arcuate oblong slots 7, whose curvature is centered on the axis 6: In the slots 7 are arranged spacers 8 for rotating the housing 4.
• the pulley 9 pivoting freely on the axis 6.
• the pulley 9 carries on one of its lateral faces a set of locking means constituted by two pawls 10, 11, pivotally mounted about axes 12, 13, respectively.
• the opposite ends of the two pawls 10, 11 are joined by return springs 14, 15.
• the active ends 16, 17 of the pawls 10, 11 are intended to cooperate with hooking notches such as 18 carried by the inner surface of the ratchet 4.
• the locking means are able to block the rotation of the pulley 9 relative to the housing 4 when the speed of rotation of the pulley exceeds a predetermined speed.
• the housing 4 carries on its outer surface a movable stop 19. Between the movable stop 19 and one of the flanges 1 is fixed a return spring 20 in position of the housing. Opposite the movable stop 19, fixed between the flanges 1, is disposed a fixed stop 21. A rope 22 passes in the groove of the pulley 9, and between the movable stop 19 and the fixed stop 21.
• the ovoid part 5 which has a groove for receiving the rope 22. This groove is in propeller because the rope 22 makes at least one complete turn around the ovoid part 5.
• the ovoid part 5 is pivotally mounted about an eccentric axis 23. The axis 23 is placed below the center of gravity of the ovoid part 5 which can thus switch between two positions: a first position in contact with a first stop 24, and a second position in contact with a second stop 25.
• the second stop 25 is adjustable in position by translation relative to a fastening wheel 30.
• the stop 25 has an oblong slot 31 which allows its displacement.
• a third stop 27 is mounted on an axis 26 fixed between the two flanges 1. The rope 22 is clamped between the third stop 27 and the ovoid piece 5. The position of the second stop 25 ensures the adjustment of the nip of the rope.
• the other side of the rope with respect to the safety device constitutes the soft strand 29.
• the pawls 10, 11 which constitute locking means of the pulley 9 on the housing 4, deviate under the effect of the centrifugal force and come to lock on the notches 18 of the inner surface of the 4.
• the pulley 9 is then locked in the housing and the traction on the rope 22 drives the housing 4 in rotation about the axis 6, by stretching the spring 20.
• the housing 4 is guided by the oblong slots 7 on the spacers 8, and the movable stop 19 approaches the fixed stop 21 by pinching the rope 22, which has the effect of locking the rope 22 and to stop the fall.
• the housing 4 is of different structure. Indeed, it is pivotally mounted on the axis 6. Inside the housing 4, the pulley 9 and the locking means to the housing are identical to those described in connection with Figure 1 and the operation of the safety device is the same.
• the second stop 25 advantageously has a cam profile and is mounted adjustable in angular position on an axis 26 fixed between the two flanges 1.
• a third stop 27 for example cylindrical, to ensure a pinching of the rope 22 between the ovoid part 5 and the third abutment 27.
• This nip is adjusted via the profile of the second abutment 25.
• the rotation of the second abutment 25 about the axis 26 ensures the adjusting the second position of the ovoid piece 5, in particular with respect to the third stop 27.
• Exhibit 5 has been described as ovoid, but may be circular. However, it must be pivotally mounted about an eccentric axis 23. It advantageously has a helical groove in which the rope 22 can slide.
• the groove of the pulley 9, on the contrary, is designed to prevent the rope 22 from sliding, so as to ensure safety, in case of fall, by blocking the strand 29 of the rope between the stops 19 and 21.

Landscapes

• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Business, Economics & Management (AREA)
• Emergency Management (AREA)
• Emergency Lowering Means (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=43066529

Family Applications (1)

Country Status (3)

Families Citing this family (4)

Family Cites Families (2)

• 2010
  • 2010-04-27 FR FR1053228A patent/FR2959135B1/fr not_active Expired - Fee Related
• 2011
  • 2011-04-27 EP EP11722843.7A patent/EP2616145A1/de not_active Withdrawn
  • 2011-04-27 WO PCT/FR2011/000254 patent/WO2011135204A1/fr not_active Ceased

Non-Patent Citations (1)

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