FR2849120A1 - Fixing device for stowing post comprises cylinder forming housing for post end which is locked in position by fins supported on end internal wall and by contact of external truncated surfaces of elements on walls - Google Patents

Abstract

The post fixing is ensured by a cylinder (8a) forming a reception housing (9a) for the post end (3). The post end is locked in position by fins (20) supported on the end internal wall (3a) and locked in position by contact of the external truncated surfaces (15b,17b) of two elements (15,17) on walls (20a,20b) of complementary shape to the fins. A threaded rod (18) ensures the movement and locking of the device.

Description

The invention relates to a means for securing a point

  anchoring on a load-bearing surface It relates more particularly to a device for fixing the lower end of an anchor post to a load-bearing surface 5 and protective equipment comprising, among other things, such a fastening device.

  In the field of equipment for protection against falls from a height, an anchoring device is a means of prevention used during interventions on the roofs of 10 buildings, the facades of buildings or structures.

  Such a device makes it possible to connect personal protective equipment, such as a harness, to a fixed structure while allowing the operator to move over the structure requiring intervention. In such a device, a mobile belay support, for example a cable, is held by a fixed anchor point, for example a ring This anchor point is connected to a structural anchor, securely fixed to the carrying surface, by an interface This interface, in the case of devices 20 permanent anchor, is generally a tubular element called a post.

  One end of the post comprises a flat base, allowing the passage of structural anchors, in particular bolts or dowels, ensuring a solid and durable fixing of the interface to the bearing surface. An anchoring device is thus obtained. permanent to prevent falls from a height during various interventions on the structure.

  It is known to weld, before its installation, one end of a post, generally metallic, on a base which is also metallic. After having been mechanically welded, these two elements must be treated against corrosion, in particular by galvanization.

  All of these operations can only be done in the workshop prior to installation on site. Given the diversity of interventions at height and installation configurations, it is necessary to have a large stock of posts, of various dimensions, already connected to their respective bases.

  Furthermore, the interface itself is generally a metallic tubular element available in several dimensions (diameter and length) from several manufacturers not necessarily having the same manufacturing tolerances and / or the same delivery times for such elements. has the consequence of further increasing the quantity of posts to be kept in stock. All of these constraints imply a relatively long delay for the installation of an anchoring device.

  It is to these drawbacks that the invention more particularly intends to remedy by proposing a device for rapid fixing of the various interfaces 20 available on the market.

  To this end, the subject of the invention is a device for fixing to a support surface of a post for securing an anchor point, characterized in that it comprises at least one element provided with adaptable fixing means at the bearing surface and at least one face, constituting a part at least of a housing for receiving one end of a post, this face being provided with at least one zone adapted to cooperate with the minus an independent means of blocking the end of the post.

  Thanks to the invention, it eliminates the assembly of the post and its base by mechanical welding and anti-corrosion treatment previously carried out in the workshop, the connection between the interface and the fixing device being made directly on the installation site.

  This reduces the time required to install an anchoring device. Such a fixing device being able to adapt to the different manufacturing tolerances encountered for the same post diameter, in particular by virtue of the independent locking means, it is no longer necessary to have significant stocks of posts. Such a device also allows, if necessary, a rapid change, on site, of the only post, without modification of the structural anchoring.

  According to advantageous but not compulsory aspects of the invention, the fixing device incorporates one or more of the following characteristics: The zone adapted to cooperate with at least one independent locking means is formed by a frustoconical external surface 15 of an element s 'extending from one side of the element forming the base of the receiving housing, towards the interior thereof.

  This element is provided with a central orifice oriented in a direction generally coincident with a main axis of the housing.

  The receiving housing is flared in the direction of its outlet, in order to cooperate with walls of different thickness from one end of post.

  The locking means comprises a hollow corner 25 movable relative to the frustoconical element under the action of a traction and locking member in a direction generally coincident with the main axis of the housing.

  Advantageously, the traction and locking member is a threaded rod, inserted in the central orifice of the frustoconical element and free to rotate in the orifice.

  External surfaces of the frustoconical element and of the hollow corner are adapted to cooperate, respectively and simultaneously, with complementary surfaces of at least one support member on the internal wall of an end of post.

  At least one support member is positioned between the frustoconical element and the hollow corner so that the movement of the latter generates a centrifugal radial displacement of the support member.

  The pulling member maintains at least one support member against the internal wall of one end of a post so that the latter is blocked in the receiving housing.

  The frustoconical element comprises at least a pair of vertical tongues between which the support member is guided.

  Alternatively, the zone intended to cooperate with an independent blocking means is formed by an internal surface of a hollow extension of triangular shape extending from the face of the element constituting a housing for receiving one end of a post towards the outside of the element The independent locking means 20 is a removable corner of shape complementary to that of the extension and provided with a gripping means.

  The fastening device comprises two elements, connected to each other by connecting means, and together defining a housing for receiving an end of a post.

  The two elements are identical and have their diametrically opposite extensions.

  The element or elements provided with fixing means are made of an aluminum-based alloy, for example of cast aluminum, of an alloy of type A-57 G, A513 G or AZ 10, or even of "Zamak" Ce type of material allows the legs provided on this or these elements to be cut lengthwise for fixing to the structure, without the risk of creating a zone susceptible to corrosion.

  The invention also relates to protective equipment intended to prevent falls comprising at least one anchoring point secured to a load-bearing surface by means of posts, at least one of which is connected to the load-bearing surface by a fixing device as defined previously.

  Such an anchoring device is easier and quicker to install than those known in the art, while being more adaptable and more economical.

  The invention will be better understood and other advantages thereof will appear more clearly in the light of the following description of a fixing device according to the invention, given solely by way of example and made with reference in the accompanying drawings in which: FIG. 1 is a general view of an anchoring device for personal protective equipment, according to the invention, in place on a horizontal load-bearing surface, FIG. 2 is a perspective view of the various components of the fixing device shown in FIG. 1 before their installation, FIG. 3 is a top view of the fixing device according to the invention before the installation of the components, FIG. 4 is a section along the section plane IV-IV of FIG. 3 with the tubular end of the post and the constituent elements in place, FIG. 5 is a perspective view of another embodiment of the device if anchor, in place 30 on a horizontal bearing surface and Figure 6 is a sectional view along the section plane VI-VI of Figure 5 with the tubular end of the post and a wedge in place.

  The anchoring device shown in FIG. 1 comprises a horizontal support surface 1 on which are fixed several fixing devices 2 supporting the tubular ends 3 of posts Each post 5 ends in a post head 4 provided with a point of fixed anchor 5 for guiding and maintaining a flexible belay support 6 to which is connected a movable anchor point 7 allowing the attachment of personal protection equipment not shown.

  Each fixing device 2 consists of an element 8 identical to that shown in FIG. 2 The body of each element 8 is in the form of a vertical cylinder 8 a whose concave face 9 is of geometry complementary to the surface external of the tubular end 3 of the post.

  On the outside of the cylinder 8, each element 8 has four tabs 10 These extend from the lower end of the cylinder 8 a towards the outside of the element 8 in two directions Dl DI 'and D 2 D 2 '20 generally orthogonal to the longitudinal axis CC' of the cylinder 8 a These directions Dl Dl 'and D 2 D 2' are also perpendicular to each other.

  Each tab 10 has a generally rectangular shape.

  At the most distant end of the cylinder 8 a, each tab 25 10 is provided with oblong holes 11, aligned longitudinally and allowing the passage of a fixing means, for example a bolt 11a, intended to connect the tab 10 to the supporting structure 1 Each leg 10 comprises, from this end carrying the fixing means 11, two parallel vertical reinforcing ribs 12 a extending in an arc of a circle in the direction of the upper end of the vertical cylinder 8 a on the entire length thereof A horizontal rib 12 b, similar in shape to the ribs 12 a, extends horizontally between two legs of an element 8 and connects the latter to each other and to the lower end of the cylinder These ribs 12 a, 12 b are fixed on the two long sides of each leg 10.

  These legs 10 are made of an easily sawn material 5 in order to be able to adapt the length of the legs 10, and therefore the number of bolts 11a, to the different configurations and / or bearing surfaces 1 encountered. This material is based on aluminum to avoid risk of corrosion after adaptation of the element 8 to its installation area.

  The base 8 b of the cylinder 8 a, from which the legs 10 extend, is provided with a recess 13, in the form of a funnel, formed on the external face of the base 8 b This recess 13 is provided with 'a central orifice 14. 15 This orifice extends inside an element 15 and opens out inside the cylinder 8 a This element 15 comprises a central part, the external surface 15 b of which is frustoconical, and three branches star 15 c.

  The wall of the cylinder 8 a has a variable thickness. The thickest part of this wall is situated at the base of the cylinder 8 a and the thinnest part at the level of the open terminal end of the latter. In this way, the internal face 9 of the cylinder 8 has an angle with the longitudinal axis CC 'of the housing 9 to 25 and diverges in the direction of its outlet.

  The frusto-conical element 15 is provided, at its periphery, with several tongues 16 These tongues 16 are in the shape of a rectangular trapezoid and are fixed, by their small base, to the external wall of the element 15 They thus extend along from the wall of the element 15 in radial directions relative to the axis CC ′ These tongues 16 extend beyond the free end of the element 15 into which the orifice 14 opens out. These tongues are regularly spaced, in pairs, on the external wall of the element 15.

  The element 15 and the tongues 16 thus form part of the means for blocking the end 3 of the post. 5 These means also include a wedge 17 in the form of a truncated cone. This wedge 17 is arranged so that its small base 17 a is opposite the small base 15 a of the element 15 A threaded rod 18, introduced by the recess 13, passes through the orifice 14, the element 15 and the wedge 17 on which it is blocked by a nut 19.

  Plane fins 20, full and generally in the shape of a trapezoid, are positioned vertically between the element 15 and the corner 17 These fins are arranged by making their two inclined sides 15 respectively coincide 15 20 a, 20 b with the external surfaces 15 b respectively and 17 b of the parts 15 and 17 In this position, the fins 20 have their large bases 20 c oriented towards the internal face 9 of the housing 9 a.

  When the tubular end 3 of a post is introduced into the housing 9 a, this end, depending on its diameter and / or the thickness of its wall, penetrates more or less inside the cylinder 8 a Indeed, the inclination of the internal face 9 of the housing 9 a can form a stop for the translational movement of the tubular end 3 in the direction of the base 8 b of the cylinder.

  The end 3 can also rest on the base 8 b.

  When the end 3 is introduced, the walls of the latter are positioned between the internal face 9 of the cylinder 8 a and the large bases 20 c of the 30 fins 20.

  When, from the recess 13, the threaded rod 18 is screwed, this causes the wedge 17 to move in translation by virtue of the locking in rotation by the bolt 19 of the threaded rod 18 in the wedge 17.

  Approaching the element 15, the corner 17 causes the angular sector defined by the surfaces 15 b and 17 b of these two parts to close. This movement results in displacement (arrow F) of the fins 20 by respective sliding of the walls 15 b and 17 b on the walls 20 a and 20 b of the fins At the end of this movement, the large bases 20 c of the fins 20 are supported on the internal wall 3 a of the tubular end 3 of the post.

  The tongues 16 make it possible to maintain the fins 10 20 in a generally vertical position and to guide them during this movement.

  When the end 3 of a post is introduced into the device 2, it is frequent that, taking into account the tolerances accepted by the various post suppliers, a clearance is observed between the external wall of the post and the internal wall of cylinder 8 a For a diameter commonly encountered of the order of 76 mm, play can be observed up to 2.5 mm depending on the supplier. A fixing device comprising at least three fins 20, regularly arranged around the element 15, allows uniform support and effective blocking of the tubular end 3 of the various posts encountered.

  The threaded rod 18 secures the end of the post in the cylinder 8 in position. It is sufficient, in a second step, to fix the assembly to the support surface 1 by the lugs 10 and the bolts 11a.

  Once in place, it is no longer possible to unlock the tubular end 3 of the post without first having detached the fastening device 2 from the support surface 1.

  This avoids any accidental exit from the end of the post of the housing while allowing if necessary, disassembly and change of the end of the post. FIG. 5 illustrates another embodiment of the invention in which the cylinder 8 a is formed by the connection between two identical half-elements 8 'Each half-element 8' has a main body in the form of a half-cylinder 8 'to Each of the vertical edges of a half cylinder 8 ′ has knuckles 21 regularly spaced and staggered relative to the knuckles 21 of the other half 10 cylinder 8 ′ a When two half elements 8 ′ are combined so as to form a cylinder 8 '' a, the knuckles 21 fit together and are locked in position by a pin 21 a.

  Each half element 8 'has a hollow extension 22, the internal shape of which is a right triangle.

  The junction surface between each extension 22 and the cylinder 8 '' a is hollowed out so as to allow communication between the face 9 'of the cylinder 8' 'a and the interior of the extension 22 The point 22 a of this extension triangular 22 is oriented towards the lower end 20 of the cylinder 8 '' a Its small base 22 b is oriented towards the top of the cylinder 8 '' a This part 22 b extends outwards and is open so as to allow a communication between the concave face 9 'and the outside of the cylinder 8' 'a Each extension 22 includes an internal surface 22 c situated opposite the junction zone with the cylinder 8' 'a This surface 22 c is inclined in direction of the exterior of the half-element 8 ′ A corner 23 makes it possible to lock the tubular end 3 of the post in position.

  This corner 23 has a triangular shape and dimensions allowing it to be easily inserted into the extension 22 through the opening 22 b of the latter. Thus the corner 23 will cooperate with the surface 22 c and come to lock in position against the outer wall of the end 3 of the post The corner 23 has on its base 23 a, located opposite the tip, a recess 23 b constituting a means for gripping or extracting the corner 23 This recess 23 b allows insert the tip of a tool and easily remove the corner 23 from the extension 22.

  As shown in FIG. 6, a fixing device 2 ′ comprises two extensions 22 each belonging to an element 8 ′ and placed diametrically opposite. The two corners 23, inserted in these extensions 22, 10 make it possible to block the tubular end 3 in vertical position and centered in the housing 9 a 'of the fixing device 2'.

  With such a device, when the tubular end 3 of a post is introduced into the device 2 ', it is held in a vertical position and locked in translation by the radial forces exerted by the corners 23, on the external wall of the 'end 3 and directed towards the interior of the latter.

  If it is desired to change the post, it suffices to remove, thanks to the recess 23 b, one or both corners 23 of the extensions 22 to easily release the end 3, without causing any structural modification of the latter and / or of the device 2 ′ It is therefore easy to re-lock a post later in the fixing device 25 2 ′.

  It is entirely conceivable to produce a fastening device 2 'according to the invention consisting of a single element 8' Advantageously a fastening device according to the invention is made of light parts resistant to corrosion, for example in cast aluminum In another embodiment, the tubular end 3 has a section other than circular, the shape of the element 8 then being adapted as well as the shape, the arrangement and the number of the fins 20 or of the extensions 22.

  As a variant, the fins 20 can be held in place by grooves and / or tongues arranged on the wall 17b of the corner 17.

  Similarly, in another configuration, the fins can be held by a holding member such as an O-ring passing through a groove formed in the large base 20 c of each fin.

  The shape and number of the horizontal ribs 12 b and / or vertical 12 a may also be different.

Claims (14)

RESELL I CATIONS   1 fixing device on a carrying surface 5 of a post for securing an anchor point, characterized in that said device comprises at least one element (8, 8 ') provided with fixing means (10, 11 ) adaptable to said surface (1) and at least one face (9, 9 '), constituting at least part of a receiving housing (9a, 9' a) 10 of one end (3 ) a post, said face being provided with at least one zone (15b, 22c) adapted to cooperate with at least one independent means (20, 23) for blocking said end. 2 fastening device according to claim 1 15 characterized in that said zone (15 b) is formed by a frustoconical external surface (15 b) of an element (15) extending from a face of said element ( 8) forming the base (8 b) of said housing (9 a), towards the interior thereof.   3 Fastening device according to claim 2 characterized in that said element (15) is provided with a central orifice (14) oriented in a direction generally coincident with a main axis (CC ') of said housing (9a).   4 Fastening device according to one of the preceding claims characterized in that said housing (9a) is flared in the direction of its outlet, in order to cooperate with walls of different thickness from one end (3) of post.   5 Fastening device according to one of claims 2 or 3 characterized in that said blocking means comprises a hollow corner (17) movable relative to said frustoconical element (15) under the action of a traction and blocking member (18) in a direction generally coincident with the main axis (CC ') of said housing (9a).   6 Fastening device according to claims 3 and 5 characterized in that said traction and blocking member 5 is a threaded rod (18), inserted in the central orifice (14) of said frustoconical element (15) and free to rotate in said orifice (14).   7 A fixing device according to claim 5 characterized in that external surfaces (15b, 17b) of said frustoconical element (15) and said hollow corner (17) are adapted to cooperate, respectively and simultaneously, with complementary surfaces (20 a, 20 b) at least one support member (20) on the internal wall (3 a) of one end (3) of a post.   8 Fastening device according to one of claims 5 to 7 characterized in that at least one support member (20) is positioned between said frustoconical element (15) and said hollow corner (17) so that the movement of the latter generates a centrifugal radial movement (arrow F) of said support member (20).   9 Fastening device according to one of claims 5 to 8 characterized in that said traction member (18) ensures the maintenance of at least one support member (20) against the internal wall (3a) of a end 25 (3) of the post so that the latter is blocked in said housing (9a).   Fastening device according to one of claims 2 to 9 characterized in that said frustoconical element (15) comprises at least one pair of vertical tongues (16) between which said support member (20) is guided.   11 Fastening device according to claim 1, characterized in that said zone (22 c) is formed by an internal surface of a hollow extension (22) of triangular shape extending from said face (9 ') towards the 'outside of said element (8').   12 Fastening device according to claim 11, characterized in that said independent locking means 5 is a removable corner (23), of shape complementary to that of said extension (22) and provided with a gripping means (23 b) .   13 Fastening device according to one of the preceding claims, characterized in that said device (2 ') comprises two elements (8'), interconnected by connecting means (21, 21 a), and together defining a receiving housing (9 'a) at one end (3) of a post.   14 Fastening device according to claim 13, 15 characterized in that said elements (8 ') are identical. Fastening device according to claim 14, characterized in that the two elements (8 ') have their diametrically opposite extensions (22).   16 Fastening device according to one of the preceding claims, characterized in that said element (s) (8, 8 ') provided with fixing means (10, 11) are made of an aluminum-based alloy.   17 Protective equipment intended to prevent 25 falls comprising at least one anchoring point (5) secured to a load-bearing surface (1) by means of posts, at least one of which is connected to the load-bearing surface (1) by a device fixing (2, 2 ') according to one of the preceding claims.