WO2009074697A1

WO2009074697A1 - Safety ladder

Info

Publication number: WO2009074697A1
Application number: PCT/ES2008/000675
Authority: WO
Inventors: Jesús Carlos BRAVO SÁNCHEZ-CIFUENTES
Original assignee: Bravo Sanchez-Cifuentes Jesus
Priority date: 2007-12-10
Filing date: 2008-10-30
Publication date: 2009-06-18
Also published as: ES1066768Y; ES1066768U

Abstract

The invention relates to a fixed safety ladder comprising a novel structure for climbing to a certain level. Said ladder comprises two parallel anchoring plates which are fixed to a facing. Four devices for holding the user are inserted into the plates, two devices being for hands, provided with ergonomic grips and a safety ring, and the other two devices for feet, provided with holding belts. There are two positions, one for sliding upwards/downwards, and another in which the device is locked by a lever with the plate. Each device locks/unlocks independently in that the ascending/descending manoeuvre is carried out freely at the request of the user. In order to ensure safety, the upper devices comprise a safety ring for fixing to the harness of the user. Said four devices are portable and insertable into the plates in order to form part of the safety ladder, and once they have been used, are separated from the structure so that the ladder cannot be used by others.

Description

SECURITY STAIRCASE

DESCRIPTION OF THE INVENTION

The present invention concerns a fixed safety ladder. The device is provided so that an operator who accesses the safety ladder always remains self-insured in the climbing operation by it. At the same time there is a rapid and comfortable ascent to levels above the user's position as well as descent. The device consists of two fasteners for the user's forelimbs and another two for the lower limbs that are attached to plates fixed on the element to be scaled, so that in the ascending position the fasteners behave as sliders and in the position of descent they block the movement. The safety ladder has been conceived in order to obtain numerous advantages over other existing means with similar purposes in the industrial sector, wind turbines, telecommunications.

Numerous devices or means are known to perform the climbing to sites at different heights, always based on a staircase with steps through which it is scaled. These systems have several disadvantages: they need auxiliary safety means to avoid falls at different levels, they have the inherent danger of slipping on steps, the steps of rise are marked or standardized by what they do not adapt to the user's height and imply a delay in the climbing. For all this, the speed in the operations of climbing and descending stairs is compromised. In addition, duplicate, ladder and lifeline costs are generated. The device of the invention has a new structure for climbing at different levels. It consists of two anchor plates, fixed to vertical walls by means of spacer bushes, parallel to each other. Four user support devices are incorporated thereto, two for the forelimbs or hands, provided with ergonomic grip support and safety ring, and two for the lower extremities or feet provided with fastening straps. Two to two are inserted into the plates previously fixed to the wall. These devices have two positions, one of ascent in which it is sliding, and another of descent in which the device locks by lever with the plate in that same position. In this way

SUBSTITUTE SHEET (RULE 26) Each device performs the locking / unlocking independently so that the ascent / descent maneuver is carried out with total freedom and always at the user's request. To ensure user safety at all times, the handholding devices have a safety ring to anchor the user's harness there. In addition, these four devices are portable, they are anchored to the plates to be part of the safety ladder, and at the end of use they are separated from the structure with which the ladder is rendered useless to other users when that is what is intended. In the same way these devices can be used in those places provided with the fixed anchor plates.

The fixed safety ladder is constituted by the coupling of figures 2 and 3 in figure 1, so that in each fig.1 a fig.2 and a fig.3 are inserted, always fig.2 above fig. 3. Two parallel plates are installed separated from each other by a distance of 40 centimeters. In fig. 1, the plates are joined together by the connecting element 2 screwed together to reach the desired ladder length in each case. Likewise, the plates are anchored to the wall by means of the separation / fixing bushes 4, which are attached to the plate through the perforation for fixing 3. The bushes 4 are necessary to give way to the anchoring devices fig. 2 and fig. 3 along the plates fig. 1.

Figure 2 shows the manual anchoring device by which the user has a point of attachment to each plate fig.1 (two by stairs). It consists of an ergonomic handle 8 added to the support 7 to which the user's hand grips, all associated with the anchor armature 5. The device has a tilting system so that in ascension the position is sliding fig.4 and when force downwards, sense of gravitational force, the tilting system blocks by lever effect Fig. 5. The sliding position fig.4 is achieved by a roller system 6, four rollers per device, which facilitates sliding. The blocking position fig.5 is achieved by exercising the device fig.2 lever effect with the plate that prevents its displacement and thus ensure its position. In addition, the system fig.2 by its own weight and by the effect of gravity can block itself. The device has a safety ring 9 to anchor the anchoring elements from the user's harness, so that it is permanently self-insured.

Figure 3 shows the anchoring device for lower extremities or feet by means of which the user of the safety ladder has a point of attachment to it for each foot, one on each plate fig. 1. It consists of support for the feet 12, in which there are fastening tapes 13 for the feet of the user, two for each device, all associated with the reinforcement of the anchor 10. The device has a tilting system so that in ascension The position is sliding fig.4 and when force is made in the downward direction, direction of the gravitational force, the tilting system locks by lever effect fig.5 The sliding position fig.4 is achieved by means of a roller system 11, four per device anchoring, which facilitates sliding. The locking position fig.5 is achieved by exerting the device fig.3 lever effect with the plate fig.1 preventing its movement and thus ensuring its position. In addition, the system fig.3 by its own weight and by gravity can block itself. It is not provided with a safety ring.

Figure 4 shows the positions of ascent and descent, sliding position. It is achieved by means of a roller system 11 associated with the anchoring devices fig.2 and fig.3, four per anchoring device, which facilitates sliding.

Figure 5 shows the locking positions that support. The blocking is caused by the lever effect of the anchoring device fig.2 or fig.3 with the plate fιg.1

Claims

The fixed safety ladder is characterized by being constituted by two plates (fig. 1), fixed to the wall by means of fixing / separating caps (4) by means of screws in position (3), for the coupling in them of the devices of manual clamps (fig.2) and clamping devices of lower extremities or feet (fig.3) one for each plate, standing (fig.2) always above the vertical of (fig.3). The manual anchoring device (fig.2), whereby the user has a point of attachment to each plate (fig.1) (two by stairs), consists of an ergonomic handle (8) added to the support (7) a Which grabs the user's hand, all associated with the reinforcement of the anchor (5). The device has a tilting system so that in ascending and descending position it is sliding (fig. 4) and when force is made in a downward direction, direction of the gravitational force, the tilting system blocks by lever effect (fig. 5). The sliding position (fig.4) is achieved by a roller system (6), four rollers per device, which facilitates sliding. The blocking position (fig. 5) is achieved by exercising the device (fig. 2) lever effect with the plate (fig. 1) that prevents its displacement and thus ensure its position. In addition, the system (fig.2) by its own weight and due to the effect of gravity can block itself and has a safety ring (9) to anchor the anchoring elements from it! user harness, so that it is permanently self-insured. The anchoring device for lower extremities or feet (fig. 3), whereby the user of the safety ladder has a point of attachment to it for each foot, one on each plate (fig. 1), consists of support for the feet (12), in which there are fastening tapes (13) for the user's feet, two for each device, all associated with the anchoring reinforcement - (10JT ^~ EÍ ^~ device has a tilting system of so that in ascending-descending position the position is sliding (fig.4) and when force is made in a downward direction, direction of the gravitational force, the tilting system blocks by lever effect (fig.5) The sliding position (fig.4) it is achieved by a roller system (11), four per anchoring device, which facilitates sliding. (fig.5) is achieved by exercising the device (fig.3) lever effect with the plate (fig. 1) that prevents its displacement and thus ensure its position. In addition, the system (fig. 3) by its own weight and by the effect of gravity can block itself. Each device performs the locking / unlocking independently so that the ascent / descent maneuver is performed with total freedom and always at the user's request. In addition, these four anchoring devices are portable, they are anchored to the plates to be part of the safety ladder, and at the end of the use they are separated from the structure so that the ladder is rendered useless to other users, when that is what aims to. In the same way these devices can be used in those leaks provided with the fixed anchor plates (fig. 1).