EP1087098A1 - Safety device - Google Patents

Abstract

The anchor consists of an elongated body (5) such as a rod, screw, bolt or dowel, fixed in a wall (1) or other support. On the outside of the wall it has a head (4) engaging with a recess (10) in a spacer bush (9) shaped to receive an inverted U-shaped coupling member (12) on the safety fitment. The spacer bush is made, for exmaple, in the shape of a rolelr with a peripheral groove to receive the coupling.

Description

The present invention relates to a security device to prevent slipping or overturning of a ladder resting on a vertical surface, such as a wall, by cooperation of arranged security organs respectively on the device and in the surface vertical as well as a ladder fitted with a device aforementioned type.

Simple sliding ladders do not have no effective device to maintain them securely resting on a vertical surface such than a wall. The result is a large number of accidents, especially when these scales are used for roofing work. Indeed, to date, solutions developed consist either of providing the uprights the ladder of non-slip shoes, or to equip the ladder of a stabilization leg whose bottom is flared, the whole then resembling a device for stepladder type. This second solution requires having a large floor area.

An object of the present invention is to provide a safety device whose design, despite its simplicity, ensures reliable maintenance of the ladder resting on a wall regardless of its tilt relative to the wall.

Another object of the present invention is to provide a safety device that can be easily positioned without tools on a standard scale.

To this end, the invention relates to a device for safety to prevent slipping or overturning a ladder resting on a vertical surface, such that a wall, by cooperation of security organs arranged respectively on the device and in the surface vertical, characterized in that the device, carrying the or the security organs, consists of at least one solidary crossbar, permanently or removable, to the said scale uprights by connecting the uprights of scale between them, this crosspiece carrying at least one security member consisting of a flap pivoting around said crosspiece, this pivoting flap comprising a opening, this opening being arranged to be housed behind the head of an anchor during the positioning of the ladder fitted with the device, this anchor being immobilized in the thickness of the vertical support surface of the ladder.

Thanks to the design of the pivoting shutter, cooperation between security organs is possible regardless of the inclination given to the scale.

The invention also relates to a ladder of the type having a safety device to prevent sliding or overturning a ladder pressing a vertical surface, such as a wall, by cooperation security organs placed respectively on the device and in the vertical surface, characterized in that the device is of the type mentioned above.

la figure 1 représente une vue en perspective d'un dispositif de sécurité conforme à l'invention ;

la figure 2 représente une vue de face d'un dispositif de sécurité équipant une échelle en appui sur une surface verticale ;

la figure 3 représente une vue de côté de la figure 2;

la figure 4 représente une variante du dispositif de sécurité monté sur une échelle en appui sur une surface verticale ;

la figure 5 représente une vue de côté du dispositif de la figure 4 ;

la figure 6 représente une vue de face d'une autre variante d'un dispositif de sécurité conforme à l'invention et

la figure 7 représente une vue en perspective d'un organe d'ancrage destiné à être inséré dans une surface verticale pour coopérer avec les éléments de sécurité portés par le dispositif de sécurité.

The invention will be clearly understood on reading the following description of exemplary embodiments, with reference to the appended drawings in which:

Figure 1 shows a perspective view of a security device according to the invention;

FIG. 2 represents a front view of a safety device fitted to a ladder resting on a vertical surface;

Figure 3 shows a side view of Figure 2;

FIG. 4 represents a variant of the safety device mounted on a ladder resting on a vertical surface;

Figure 5 shows a side view of the device of Figure 4;

FIG. 6 represents a front view of another variant of a security device according to the invention and

FIG. 7 represents a perspective view of an anchoring member intended to be inserted into a vertical surface to cooperate with the security elements carried by the security device.

The safety device, object of the invention, is intended to prevent slipping or overturning of a ladder resting on a vertical surface 16, such as a wall, by cooperation of security organs 12, 13, 14 arranged respectively on the device and in the vertical surface 16.

This device consists of at least one cross 10 can be joined directly or indirectly, so permanent or removable, to the uprights 1 of the ladder connecting the uprights 1 of the ladder together. This cross member 10 carries at least one safety device consisting a flap 12 mounted free to pivot about the axis of the cross member 10 forming a pivot. This component 12 includes a opening 13. This opening 13 is arranged to be housed behind the head 18 of an anchoring member 14 during the positioning of the ladder fitted with the device. This anchor member 14, such as a rod, a bolt, a socket or the like is immobilized in the thickness of the vertical surface 16 of the ladder support. In the example shown in Figure 7, the anchor member 14 comprises a grooved roller 15 intended to cooperate with the head 18 of said anchor member 14. The opening 13 of the flap 12, which assumes the shape of an overturned open U, then climbs to horse in the throat at least partially surrounding the bottom of the groove 15 of the grooved roller. Of course, other embodiments of this anchoring member 14 can be considered.

In a particular embodiment which will be described in detail below, the cross member 10 can be secured to ladder posts via stirrups 3 axially immobilizable on the ladder uprights. These stirrups 3 are connected with variable spacing thanks to the fact that the cross 10 is formed of interlocking elements telescopic.

The cross member 10, which carries the security member (s) 12, 13, is fixed directly or through link arms to stirrups 3.

Also, the cross 10 between stirrups 3 can be constituted simply two fixed tubes 10A, 10B fixed respectively to a stirrup 3, at least one of the tubes being provided with said safety device described above. This example is more particularly represented in Figures 1 to 3.

In another embodiment shown in Figures 4 at 6, the cross member 10 between stirrups 3 consists of a cross substantially U-shaped, the soul of the U being formed of elements 10'A, 10'B mounted to interlocking telescopic to allow variable spacing of branches 9 of the U. These branches 9 are housed at telescopic socket inside departures 11 from fixing integral with the stirrups 3 to allow a variable spacing between core of U and uprights 1 of the scale. The soul of the U carries the organ (s) of security. This embodiment makes it possible to have the ladder with variable spacing from the vertical surface 16 to which it should be applied. Departures 11 from fixing integral with the stirrups 3 are in this case consisting of simple sections of tube inside which are housed in telescopic interlocking branches 9 of the U-shaped cross member. branches 9 inside the outlets 11 for fixing east obtained for example by means of pins or pins simultaneously passing through the fixing feeders 11 and the branches 9.

The substantially U-shaped stirrups 3 are arranged to partially surround said uprights 1 of the scale. These stirrups 3 are preferably arranged on the scale so that the soul of the U is applied to them front or rear faces of the ladder uprights, such as show the figures while the branches of the U come opposite the faces of the uprights 1. The cross member 10 generally rests on the core of the U of the stirrup and is joined to the latter.

These stirrups 3, axially immobilizable on the uprights 1 of scale, are connected, in addition to variable spacing, to the by means of an axis 6 capable of being threaded through holes 4 crossing stirrups 3 to keep them at the state fitted on the uprights 1 of scale.

In order to maintain the nested state of these stirrups 3, the axis 6 comprises at least one locking member 7, 8 ensuring its axial immobilization in the threaded state at through the stirrups 3. In the examples shown, the member 7, 8 for locking the axis 6 for holding the stirrups 3 is arranged to engage with a post 1 of scale. This axis 6 locking member of holding the stirrups 3 affects for example the shape of a handle 7 terminated by a hook 8 arranged to come marry, under the effect of his own weight, an amount scale during rotation of axis 6. Positioning in the vertical state of the scale automatically ensures this rotation of the axis 6 under the effect of the weight of the handle 7 provided with its hook 8. This guarantees perfect immobilization of axis 6, including in the case where the operator would have forgotten to lock axis 6 when mounting the stirrups 3 on the ladder.

To perfect this assembly, the stirrups 3 are immobilized axially on the uprights 1. This axial immobilization can be obtained through at least one notch 5 formed on a branch of the stirrup 3, like the shows figure 6. This notch 5 is shaped complementary to a bar 2 of scale to be able marry him when positioning the stirrups 3 on the 1 ladder uprights. These notches 5 are therefore provided on the inner arms of the stirrups 3.

A variant shown in Figures 1 to 5 consists of axially immobilize the stirrups 3 on the uprights 1 of scale through the axis 6 of maintenance of stirrups 3 which, in the state threaded through the stirrups 3, simultaneously crosses a ladder bar 2. In that case, the installation of the stirrups on the ladder uprights is particularly easy.

Finally, to complete the device, one of the stirrups 3 comprises a member 17, such as a ring, for fixing of a lifeline.

The operating principle of the device described above is the next. The stirrups 3 connected together, variable spacing, through the crosspiece 10 are positioned around the uprights 1 of the ladder. Once the stirrups 3 positioned to fit on the uprights 1 of the ladder, the axis 6 for holding in the nested position of the stirrups 3 is positioned on the ladder and locked in position. All of these manipulations can be carried out on the ground while the ladder is in a horizontal position on the ground. The lifeline is attached to the ring 17. In parallel with this assembly, an anchoring member, of the type of that shown in Figure 7, is installed in the surface on which the ladder is intended to come in support. Once the device thus fixed to the scale and the anchoring member installed in the vertical surface 16, the ladder can be raised so that the flap 12 carrying the opening 13 is positioned above the member anchor 14. When lowering the ladder, the U-shaped opening 13 engages behind the head 18 of the anchoring member while the end opposite of the uprights 1 of the ladder rests on the ground. In this position, any separation from the scale of the surface on which it is supported is rendered impossible. To separate the scale from the surface vertical, it is enough to proceed in reverse, that is to say raise the ladder slightly so that at the flap 12 and at its opening 13 to position itself above of the anchoring member 14 so that it can then move away from the scale the surface 16 on which it is in support.

Thanks to this device, it results on the one hand an assembly easy of the device on the uprights 1 of the ladder, other apart, an easy coupling of the worn safety device by the device with the safety device immobilized in the thickness of the vertical bearing surface of the ladder.

In an exemplary embodiment which has not been shown, the safety device can also be installed in original equipment on the scales. In this case, the crossbar, which can be made up of one or more elements, is directly fixed permanently to the amounts of the scale.

Claims (11)

Safety device for preventing the sliding or overturning of a ladder resting on a vertical surface (16), such as a wall, by cooperation of safety devices (12, 13; 14) respectively arranged on the device and in the vertical surface (16),
characterized in that the device, carrying the safety member (s) (12, 13), consists of at least one crossmember (10) which can be fixed, permanently or removably, to the said uprights (1) of ladder by connecting the uprights (1) of scale between them, this crosspiece (10) carrying at least one safety member consisting of a flap (12) pivoting around said crosspiece (10), this pivoting flap (12) having an opening ( 13), this opening (13) being arranged to be housed behind the head (18) of an anchoring member (14) when positioning the ladder equipped with the device, this anchoring member (14) being immobilized in the thickness of the vertical surface (16) supporting the ladder. Safety device according to claim 1,
characterized in that the crosspiece (10) can be secured to the uprights (1) of the ladder by means of stirrups (3) axially immobilizable on the uprights (1) of the ladder. Safety device according to either of Claims 1 and 2,
characterized in that the crosspiece (10) is formed of elements with telescopic interlocking. Safety device according to claim 3,
characterized in that the crosspiece (10) consists of two nestable tubes (10A, 10B) fixed respectively to a stirrup (3), at least one of the tubes being provided with said safety member (12, 13). Safety device according to claim 3,
characterized in that the cross-member (10) substantially affects the shape of a U, the core of the U being formed of elements (10A, 10B) mounted with telescopic interlocking to allow variable spacing of the branches (9) of the U, these branches coming to be housed with telescopic interlocking inside outlets (11) for fastening integral with the stirrups (3) to allow a variable spacing between the core of the U and the upright (1) of the ladder, this core carrying the security organ (s) (12, 13). Safety device according to one of claims 2 to 5,
characterized in that the stirrups (3), arranged to partially surround the uprights (1) of the ladder, are further connected with variable spacing by means of an axis (6) able to be threaded through said stirrups ( 3) to maintain the latter in the fitted state on the uprights (1) of scale, this axis (6) comprising at least one locking member (7, 8) ensuring its axial immobilization in the state threaded through the stirrups (3). Safety device according to claim 6,
characterized in that the member (7, 8) for locking the axis (6) for holding the stirrups (3) is arranged to engage with an upright (1) of scale. Safety device according to claim 7,
characterized in that the locking member of the axis (6) for holding the stirrups (3) takes the form of a handle (7) terminated by a hook (8) arranged to come to marry, under the effect of its own weight, an amount (1) of scale when the axis (6) rotates. Safety device according to one of claims 2 to 9,
characterized in that the stirrups (3) are immobilized axially on the uprights (1) of the ladder by means of at least one notch (5) formed on a branch of the stirrup (3), this notch being of shape complementary to that of a ladder bar (2) to be able to marry it when positioning the stirrups (3) on said ladder uprights (1). Safety device according to claim 6,
characterized in that the stirrups (3) are immobilized axially on the uprights (1) of the ladder by means of the pin (6) for holding the stirrups (3) which, in the state threaded through the stirrups (3), simultaneously crosses a ladder bar (2). Ladder of the type comprising a safety device for preventing the sliding or overturning of a ladder resting on a vertical surface (16), such as a wall, by the cooperation of arranged safety members (12, 13; 14) respectively on the device and in the vertical surface (16),
characterized in that the security device conforms to any one of claims 1 to 10.

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