FR2868096A1 - Safety attachment for telephone booth, has central part made of material with high extensibility such that diameter and thickness of part are defined to resist force in normal conditions and limited to deform attachment under large force - Google Patents

Abstract

The attachment has a tubular central part for passage of connections of a functional unit supported by a furniture unit (3). The part is made of a material with high resilience, low elasticity and high extensibility without rupture such that diameter and thickness of the part are defined to resist force exerted on the unit (3) in normal usage conditions and limited to deform the attachment under large force.

Description

The present invention relates to all street furniture equipment,

  such as lampposts, bus shelters, telephone booths, emergency call stations, traffic signs, traffic lights, benches or planters,

  and more generally all those who ask for a solid ground connection. Most often, they also require a power supply, either electrical or telephone with or without optical fibers especially adapted to remote display or they support conduits for various fluids, water gas or compressed air. They must support the physical action of the atmospheric elements, such as the most violent winds, and withstand the constraints of user use.

  To ensure their functions, they must, most often, be installed near the lanes where the vehicles circulate.

  This situation exposes them to violent shocks resulting from collisions. The damage thus caused imposes difficult and costly rework mainly with regard to the sealed parts and can affect the various internal ducts, which often presents serious dangers.

  The device according to the invention consists of a security fastener interposed between the sealed anchor and the urban furniture element itself. It is characterized in that its particular design gives it a resistance to withstand normal use efforts, but limited exactly to preserve the elements thus connected, and mainly the sealed anchor, the most difficult to replace after a disaster. The strength of the security fastener is adjusted so that it deforms without breaking under an effort greater than the normal use, which ensures the maintenance of the physical connection between the anchor and the furniture element, also avoiding the deterioration or even tearing of the various internal connections.

  Generally, the shape of this security fastener will be that of a tubular element whose diameter and wall thickness will, in relation to the physical characteristics of the material, to establish a level of resistance adapted to withstand the conditions of normal use, but limited to deform before the occurrence of damage to the major organs.

  The connection with the sealed anchor and with the street furniture element can be done by threaded ends, bolted plates or any other conventional mechanical device.

  As a result of this assembly, during a shock causing abnormally high forces, the safety fastener will deform without breaking before the other components have suffered damage that would require an expensive intervention.

  According to a particular embodiment, this quality will be obtained by the use of a ductile material, of high resilience, having a low elasticity and accepting a high elongation before breaking.

  Materials that meet the required characteristics include aluminum and some of its ductile alloys, brass or mild steel, and any malleable material of sufficient strength.

  The effect of an abnormally high effort will first of all cause the deformation of the safety fastener and its low elasticity will avoid the dangerous whiplash effect of a sudden return to the starting position. After a disaster, it will be enough to replace the destroyed attachment easily accessible, the more noble elements not being altered.

  Preferably, the security fastener will have a substantially constant wall thickness which will promote its deformation without leading to rupture.

  An advantageous development of the device according to the invention is conceivable when the physical characteristics of the material used to make the safety fastener allow a wall thickness to integrate one or more corrugations which will have the effect of facilitating and localizing the deformation. sought and preserve the internal space where the various connections go.

  The appended figures, given solely by way of non-limiting examples, make it possible to specify the original characteristics of the invention.

  FIG. 1 represents an application of the device according to the invention comprising a security fastener (1) connected on the one hand to an anchorage (2) sealed to the ground, and on the other hand to a piece of street furniture (3). ). For clarity of the example, this element (3) is schematically represented in the form of a simple mast supporting a functional member (4). Of course, this element may as well be a candelabrum, a traffic light holder, the foot of a billboard or any other part of a set of fixed street furniture. The functional unit (4) may require internal connections, either electrical, telephone or telecommunications cables (5), or pipes (6) for fluids such as water, gas or compressed air.

  The safety clip (1) has a tubular shape, the central cavity of which is arranged to allow the passage of these various connections.

  The central portion of the safety clip (1) has a thickness of material (e1) defined to provide a level of rigidity suitable. The material is aluminum, brass or mild annealed steel or, generally speaking, a highly resilient material with low elasticity and a high elongation before breaking.

  The overall result of the efforts exerted on the element (3) of street furniture and on the various organs that it supports is here represented symbolically by a force (F) which causes a bending stress in the safety fastener (1).

  The dimensions of the tubular central part, diameter and thickness, are defined, taking into account the physical qualities of the material used, so that the safety clip (1) deforms and gives way when the intensity of the force (F) significantly exceeds the normal level of use without reaching a value that would damage the anchorage (2) and the element (3).

  Figure 2 shows the position taken after the deformation of the safety clip shown in (7).

  The deflection of the wall allows the element (3) to lie down, and the lack of elasticity of the material prevents a violent and dangerous return to the original position. The anchorage (2) and the element (3) remained attached, which also prevents the internal connections (5) and (6) from being damaged or broken.

  The anchorage (2) and the element (3), which have been subjected only to moderate efforts, have not suffered significant damage.

  FIG. 3 shows an evolution of the safety fastener (1) authorized when the physical characteristics of the material retained lead to the provision of a wall thickness (e2) such that one or more concentric toric ripples (8) can be arranged and parallel between them which will have the effect of locating the desired deformation and absorb all the deformations, thus avoiding the reduction of the internal space reserved for the connections (5) and (6).

  The state of the device after its deformation is shown in FIG. 4. It can be seen that the security fastener (1) has deformed mainly at the right of the corrugations (8) and that the interior space has thus been preserved.

  FIG. 5 shows a device according to the invention comprising a security fastener composed of three parts united by welding, brazing, gluing, crimping or any other assembly means offering the freedom to choose the materials perfectly adapted to each function. The central part (9) will be made with the shape, the thickness and the material best adapted to the desired effect. The end pieces (10) and (11) may possibly be made of different materials, better adapted to their function of connection with the anchor (2) and the urban furniture element (3).

  FIG. 6 shows an application of the device according to the invention comprising a security clip (12) adapted for fixing a substantially horizontal armature (13) to an anchor (14) for example sealed in a wall (15). Said frame supports an element (16) of street furniture such as, for example, a sign.

  In this version, a shock caused by the falling of a heavy object or the collision with a vehicle will cause the deformation of the safety clip (12) without breaking and avoiding a dangerous fall for the passers-by.

  If the functional element (16) is a light panel, a communicating terminal, a bulletin board or the like, the power supplies, the download connections or other piping will remain protected and avoid possible electrocution of people.

2868096 6

Claims (4)

  1) Device comprising a security clip (1) connected on the one hand to an anchorage (2) sealed to the ground, and on the other hand to a piece of street furniture (3) that can serve as a support for a member (4) , characterized in that said safety fastener is tubular in shape, that it is made of a material of high resilience, low elasticity and having a high elongation before rupture, that the diameter and the thickness of its central portion are defined so as to provide sufficient rigidity to withstand the forces supported by the item (3) of street furniture under the conditions of normal use, while being limited so as to cause its deformation under abnormally high forces that could damage the anchorage (2) or the element (3).   2) Device according to claim 1 characterized in that the central portion of said security clip (1) where pass the various internal connections for the member (4), which can be cables (5) electrical, telephone or telecommunication, or pipes (6) for fluids such as water, gas or compressed air, has one or more corrugations (8) toric, concentric and parallel to each other.   3) Device according to any one of the preceding claims characterized in that the security fastener comprises a central element (9) made of a high resilience material of low elasticity and offering a high elongation before rupture, associated, by welding by brazing, gluing, crimping or any other means of assembly, two ends (10) and (11) optionally each made of a different material.   4) Device according to any one of the preceding claims characterized in that the anchor (14) is sealed in a wall (15) and the security fastener (12) is also connected to a substantially horizontal element (13) .