FR3055644A1 - DEVICE FOR FIXING A SECURITY ANCHORING DEVICE ON A COVER OF A ROOF OF A BUILDING - Google Patents

Abstract

The present invention relates to a device for fixing a safety anchoring member on a roof covering of a building. According to the invention, the device is characterized in that it comprises a rigid flange (4) carrying the anchoring member (1), arranged on the roof covering (2) and comprising two tie rods (5, 6) secured to the flange (4) below it by passing through two openings of the cover (2) so as to be located on each side of a beam (3), a flexible link (9), the ends of which are integral with the two tie rods (5, 6) and passing under the beam (3) at least one tensioning means of the flexible link (9) under the beam (3). The invention finds application in the field of building.

Description

® FRENCH REPUBLIC

NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY © Publication number:

(to be used only for reproduction orders)

©) National registration number

055 644

58262

COURBEVOIE © Int Cl ⁸ : E 04 G 21/32 (2017.01)

PATENT INVENTION APPLICATION

A1

(§) Date of filing: 06.09.16. © Applicant (s): ETABLISSEMENTS FRENEHARD ET (30) Priority: MICHAUX Public limited company - FR. @ Inventor (s): COSTEUX ALEXANDRE and DELOY ARNAUD, DAVID. (43? Date of public availability of the request: 09.03.18 Bulletin 18/10. ©) List of documents cited in the report preliminary research: Refer to end of present booklet (© References to other national documents @ Holder (s): ETABLISSEMENTS FRENEHARD ET related: MICHAUX Limited company. ©) Extension request (s): © Agent (s): CABINET WEINSTEIN.

DEVICE FOR FIXING A SECURITY ANCHOR ON A COVER OF A ROOF OF A BUILDING.

FR 3 055 644 - A1 ftv / The present invention relates to a device for fixing a safety anchoring member on a roof of a building roof.

According to the invention, the device is characterized in that it comprises a rigid flange (4) carrying the anchoring member (1), arranged on the roof covering (2) and comprising two tie rods (5, 6) secured to the flange (4) under it by crossing two holes in the cover (2) so as to be located on each side of a beam (3), a flexible link (9), the ends of which are secured to the two tie rods (5, 6) and passing under the beam (3) at least one means of tensioning the flexible link (9) under the beam (3).

The invention finds application in the building field.

“DEVICE FOR FIXING A SECURITY ANCHORING MEMBER ON A COVER OF A ROOF OF A BUILDING” The present invention relates to a device for fixing a security anchoring member on a roof of a roof of a building.

It also relates to a method of mounting a device for fixing a safety anchoring member on a roof of a building roof.

Such an anchor member constitutes an anchor point to which one can attach personal protective equipment by means of a lanyard fitted at the end of a carabiner or equivalent member attached to this anchor point for provide protection against falls from a height by the person working on the roof of a building or other building.

There are currently anchors which are fixed directly to the roof covering of a building by means of fixing screws passing through the roof. More specifically, each anchoring member comprises an upper ring constituting the anchoring point of the personal protective equipment and carried at one end of a rigid cylindrical axis extending perpendicular to the roof covering and which is integral a support base fixed to the cover by means of a plurality of fixing screws passing through the cover. Such a device for fixing the anchoring member applies in particular to a covering of a fiber cement roof crossed by self-drilling screws anchored in a beam carrying the roof structure below the cover to secure the base supporting the cylindrical axis on this cover.

Such a fixing device has the drawback that the correct positioning of the support base of the cylindrical rod with anchoring ring on the fiber cement cover just above the support beam is not always easy and taking into account the large number of self-drilling screws to be used, it is necessary to proceed by trial and error to arrange the support base just above the carrying beam so that the self-drilling screws can be anchored in this beam through the cover . This fixing device also has the disadvantage of causing a risk of cracks in the fiber cement cover by the self-drilling screws, thus requiring the use of an insulator of the silicone type to plug the holes in this cover.

Thus, the above-described fixing device of the prior art does not allow satisfactory mounting of the anchor member on a fragile roof covering, in particular in fiber cement.

The present invention aims to overcome the above drawbacks of the prior art.

To this end, the invention provides a device for fixing a safety anchoring member on a cover of a roof of a building supported by structural beams of the roof and which is characterized in that that it comprises a rigid flange carrying the anchoring member, disposed on the roof covering and comprising two tie rods integral with the rigid flange under the latter crossing two orifices of the roof covering so as to be located on each side of a beam, a flexible link, the ends of which are integral with the two tie rods passing under the beam, and at least one means of tensioning the flexible link under the beam to exert a clamping force on the two tie rods the rigid flange on the roof covering.

Preferably, the flexible link is a chain where a cable and at least one of the two tie rods is a threaded rod constituting the tensioning means of the chain or the cable and of which a part passing through the rigid flange is retained axially at this flange and the remaining part located on one side of the beam extending substantially perpendicular to this flange comprises a first nut to which the corresponding end of the chain or cable is secured to allow the tension to be adjusted chain or cable by operating the threaded rod.

Advantageously, the other drawing is a threaded rod also constituting the tensioning means of the chain or cable and of which a part passing through the rigid flange is retained axially to this flange and the remaining part located on the opposite side of the beam extending substantially perpendicular to this flange comprises a first nut which is secured to the other end of the chain or cable to also allow adjustment of the tension of the chain or cable by operating this threaded rod.

According to an alternative embodiment, the part of each threaded rod is retained axially to the rigid flange by a second nut of the threaded rod and bearing on the rigid flange, which second nut can be rotated relative to the flange rigid to exert traction on the threaded rod allowing the tension of the chain or cable under the beam to be adjusted.

According to another alternative embodiment, the part of each threaded rod is retained axially to the rigid flange by a head secured to the end of this threaded rod and resting on the rigid flange, which head can be rotated relative to the rigid flange to move the first nut along the threaded rod and allow adjustment of the tension of the chain or cable under the beam.

According to another embodiment, the other tie rod is constituted by at least one rigid lug secured by welding the rigid flange perpendicularly to the latter and the other end of the chain or of the cable is fixed to the end rigid lug via a bolt.

According to an alternative embodiment, the anchoring member is constituted by a lug comprising a flat part fixed to the rigid flange coaxially to one or the other of the two threaded rods via the second nut or of the head of the threaded rod and a bent part projecting from the rigid flange above the latter and having a hole forming an anchor point for hanging personal protective equipment against falls from a height.

According to another alternative embodiment, the anchoring member is constituted by a safety hook secured to the rigid flange thereon directly above the rigid tab forming a tie and comprising a hole forming an anchoring point hang personal protective equipment against falls from a height.

Advantageously, the safety hook has in its opening forming an anchor point a frangible part.

According to another embodiment, the flexible link is a strap and the two tie rods are constituted by rigid lugs secured by welding of the rigid flange perpendicular to the latter, the strap being fixed by its two ends respectively at the two ends. of the two legs and comprising a self-locking locking loop constituting the means making it possible to tension the strap under the beam.

In this embodiment, the anchoring member is constituted by a ring secured to the rigid flange above the latter plumb with one of the tabs forming a tie and forming an anchoring point allowing '' put on personal protective equipment against falls from a height.

Advantageously, the rigid flange comprises a sheath secured to the internal face of this flange situated opposite the roof covering by crossing the corresponding orifice of the cover and being inclined relative to this internal face and crossed by the threaded rod. corresponding forming pulling so as to avoid buckling of the threaded rod during the tensioning of the chain or cable under the beam.

Advantageously, a sealing layer, for example made of foam or elastomer material, is interposed between the rigid flange and the roof covering.

Advantageously, the rigid flange is in the form of a rectangular plate extending transversely to the beam above the latter, which can be a frame rafter.

Advantageously, the anchor point is located substantially at one of the orifices of the roof covering.

The roof covering can be made of fiber cement.

The invention also relates to a method of mounting the device for fixing a safety anchoring member as defined above to a cover of a roof of a building supported by structural beams of the roof and which is characterized in that it comprises the steps of:

- introduce through one of the holes in the roof covering the chain or cable and the associated threaded rod forming a tie-rod crossing the rigid flange so that the chain or cable hangs on one side of the beam below of the latter,

- introduce through the other opening of the roof covering a tool in the shape of an arched rod, one free end of which carries a permanent magnet so as to magnetically grip the end of the chain or cable during,

- exert traction on the tool to allow the passage of the end part of the chain or of the cable secured to the magnet of this tool through the other orifice of the roof covering,

- separate the end part of the chain or cable from the magnet and secure this end part to the other pulling from the rigid flange, and

- introduce the other tie rod through the hole so that the chain or cable is located in a loop under the beam.

The invention will be better understood, and other objects, characteristics, details and advantages thereof will appear more clearly in the explanatory description which follows, made with reference to the appended drawings given solely by way of example relating to several embodiments of the invention and in which:

- Figure 1 is a cross-sectional view of a beam carrying a roof covering of a building comprising the device for fixing a safety anchoring member according to a first embodiment of the invention;

- Figure 2 is a perspective view of the fixing device of the anchor member of Figure 1;

- Figure 3 is a perspective view showing an alternative embodiment of the fixing device of Figures 1 and 2;

- Figure 4 is a perspective view of the fixing device of the anchor member of Figures 1 and 2 on a roofing of fiber cement with interposition of a sealing layer between this device and the cover;

- Figure 5 is a front view along arrow V of Figure 4;

- Figure 6 is a view similar to that of Figure 1 and showing an alternative embodiment of the fixing device of the anchoring member of the invention;

- Figure 7 is a cross-sectional view of a beam carrying a roof covering of a building comprising the device for fixing an anchoring member according to a second embodiment of the invention;

- Figure 8 is a cross-sectional view of a beam carrying a roof covering of a building comprising a device for fixing an anchoring member according to a third embodiment of the invention;

- Figure 9 is a perspective view of the fixing device of Figure 8;

- Figure 10 is a view similar to that of Figure 1 and showing an alternative embodiment of the anchoring member;

- Figure 11 is a perspective view of the fixing device of the anchor member of Figure 10;

- Figure 12 is a view similar to that of Figure 10 and showing the use of a sealing layer between the fixing device and the roofing of fiber cement;

- Figure 13 is a perspective view of the fixing device of Figure 12;

- Figure 14 is a side view along arrow XIV of Figure 12;

- Figure 15 is a view similar to that of Figure 10 and showing an alternative embodiment of the anchoring member;

- Figure 16 is a cross-sectional view of a beam carrying a roof covering of a building comprising a device for fixing an anchoring member according to a fourth embodiment of the invention;

- Figure 17 is a perspective view of the fixing device of Figure 16;

- Figures 18 to 22 show the different steps of the method of mounting the fixing device of an anchor member of Figures 1 and 2 on a roof covering of a building.

Figures 1 and 2 show a first embodiment of a device for fixing an anchoring member 1 on a cover 2 of a roof of a building or other building supported by structural beams of the roof and only one of which is represented by reference 3.

In this case, the roof covering 2 is flat and can be sloping by being supported by rafters 3 of the roof structure.

The fixing device of the anchor member 1 comprises a rigid flange 4 carrying the anchor member 1 and disposed on the roof covering 2.

Preferably, the rigid flange 4 is constituted by a rectangular plate which, once mounted in the fixing position of the anchoring member 1 to the roof covering 2, extends in a direction perpendicular to the corresponding rafter 3.

The rigid flange 2 comprises two tie rods 5, 6 secured perpendicularly to the rigid flange 2 below it and passing through two orifices 7, 8 respectively of the roof covering 2 so that the two tie rods 5, 6 are located respectively on both sides of the chevron 3 and parallel to the two lateral faces of this chevron.

The fixing device further comprises a flexible link 9, the ends of which are respectively secured to the two tie rods 5, 6 and passing in the form of a loop under the rafter 3, which flexible link can be tensioned under the rafter 3 as will be seen below to exert on the two tie rods 5, 6 a clamping or blocking force of the rigid flange 4 on the roof covering 2.

The flexible link 9 is constituted by a metallic chain with links and the tie rod 5 is constituted by a threaded rod constituting the means for tensioning the chain 9.

The threaded rod 5 comprises an upper end portion passing through the orifice 7 of the roof covering 2, an orifice of the rigid flange 4 in the vicinity of one end of the latter and an orifice of the member d anchoring 1, which upper end part is retained axially to the rigid flange 4 by a nut 10 enclosing the anchoring member 1 between a washer 11 and the rigid flange 4.

As shown in Figure 1, the anchor member 1 is sandwiched between the nut 10 and a sealing spacer ring 12 bearing on the rigid flange 4 on the edge delimiting the circular orifice of this flange crossed by the threaded rod 5.

The anchor member 1 is constituted by a lug comprising a flat part 1a bearing on the rigid flange 4 by means of the sealing spacer ring 12 while being fixed coaxially to the threaded rod 5 by l 'nut 10 and a bent portion 1b projecting from the rigid flange 4 above it and having a hole 1c forming the anchor point for hanging personal protective equipment against falls from a height.

The remaining lower part of the threaded rod 5 located on one side of the rafter 3 extending substantially perpendicular to the rigid flange 4, comprises another nut 13 which is secured to the corresponding end of the chain, for example by welding.

The other tie rod 6 located on the other side of the rafter 3 is constituted by two rigid parallel legs 6a in the form of a rectangular plate secured by welding of the rigid flange 4 perpendicularly to the latter and passing through the orifice 8 of shape rectangular or circular of the roof covering 2. The end of the chain 9 opposite to that secured to the nut 13 is fixed to the lower ends of the two rigid legs 6a by means of a bolt 14 passing through the two legs 6a .

Thus, the resting chain 9 is fixed to the two tie rods 5, 6 so as to partially surround the rafter 3 by passing under it.

To tension the chain 9 bearing under the rafter 3, an operator maneuvers in rotation using a key the nut 10 relative to the rigid flange 4 to exert an upward tensile force relative to Figure 1 of the threaded rod 5 making it possible to drive simultaneously in translation with the threaded rod 5 the other nut 13 which tightens the chain 9 to a desired tension value controlled by the nut 10. In this way, the chain 9 exerts a tensile force by reaction on the two tie rods 5, 6 which press and tighten the rigid flange 4 on the roof covering 2.

Preferably, the anchoring hole 1c of the anchoring member 1 is located as close as possible to the opening 7 of the roof covering 2 and the corresponding opening of the rigid flange 4 to through which passes the upper end portion of the threaded rod 5 to allow the creation of a bracing of the attachment device to the rafter 3 in order to prevent the anchoring member 1 from sliding along this rafter during a fall of a person intervening requesting the anchoring member 1 according to an effort directed in the same direction as the rafter 3.

The alternative embodiment of the fixing device shown in Figure 3 does not differ from the fixing device of Figures 1 and 2 in that it comprises, if necessary, one or two self-drilling screws 15 passing through the rigid flange 4 and the roof covering. 2 to locate in the rafter 3 not shown in FIG. 3 to ensure better retention of the rigid flange 4 on the roof covering 2.

According to the two alternative embodiments shown in Figures 1 to 3, the rigid flange 4 comprises a sheath 16 secured to the inner face of the rigid flange 4 located opposite the roof covering 2 and which passes through the orifice 7 of this cover by being inclined relative to this internal face. The sleeve 16 is crossed by the upper end part of the threaded rod and its inclination in the opposite direction to the rafter 3 makes it possible to avoid buckling of the threaded rod 5 towards the chevron 3 during the tensioning of the chain 9 under this chevron.

Figures 4 and 5 show an alternative embodiment of the fixing device of Figures 1 and 2 and according to which the fixing flange 4 is fixed to the roof covering 2 by means of a sealing layer 17 , such as for example a foam material or an elastomeric material, covering the orifices 7 and 8 of the covering 2. More specifically, the roof covering 2 is, in the present case, constituted by a fiber cement material having in cross section a corrugated shape and the rigid flange 4 as well as the sealing layer 17 are fixed to the bottom of the hollow of a half-wave whose convex external face is supported on a beam 3 formed in the present case by a failure of the frame of roof and above which the rigid flange extends transversely 4.

FIG. 6 represents an alternative embodiment of the fixing device of FIGS. 1 and 2.

According to this alternative embodiment, the tie rod 5 also comprises a threaded rod but the upper end of which is integral with a head 18 thus forming with the threaded rod a screw.

In this case, the head 18 is hexagonal in shape.

In addition, the lug 6 forming a tie is formed by a half-link of a chain to which is fixed the end of the chain opposite to that secured to the nut 13 of the threaded rod 5, which half-link , which extends in a plane substantially parallel to the lateral face of the rafter 3, is integral with the rigid flange 4 by extending perpendicularly from the latter and passing through the rectangular or circular orifice 8 of the roof covering 2.

The other components of the fixing device of Figure 6 are identical to those precisely described with reference to Figures 1 and 2 and will therefore not be detailed again.

To fix the rigid flange 4 on the roof covering 2, an operator, using a key engaged with the head 18, rotates the threaded rod 5 relative to the rigid flange 4 and the cover of roof 2 in a direction allowing the displacement of the nut 13 upwards, that is to say towards the cover 2, until the chain 9 is tensioned energetically under the rafter 3 to a value allowing the tightening of the rigid plate 4 on the cover 2. The displacement of the nut 13 along the threaded rod 5 is made possible by the fact that the end of the chain 9 integral with this nut retains the latter in rotation relative to the threaded rod 5.

7 shows another embodiment of the fixing device of the invention according to which each of the two tie rods 5, 6 is constituted by a threaded rod identical to the threaded rod described with reference to Figures 1 and 2. Thus , the tabs 6a forming a tie 6 in FIGS. 1 and 2 are replaced by a threaded rod 6 in FIG. 7 which extends parallel to the threaded rod 5 on one side of the rafter 3 opposite to that where the threaded rod 5 is located.

In addition, the chain 9 is fixed by its two ends respectively to two nuts 13 threaded on the two threaded rods 5, 6.

Otherwise, all the other components of the fixing device of Figure 7 are identical to those previously described in the fixing device of Figures 1 and 2 and will therefore not be detailed again.

The other difference between the fixing device of Figure 7 compared to that of Figures 1 and 2 is that the anchoring member is fixed between the nut 10 and the rigid flange 4 on the threaded rod located left of figure 7.

To adjust the chain tension 9 to a value allowing to block the rigid flange 4 on the roofing 2, an operator maneuvers in rotation using a wrench each of the two nuts 10 to allow the corresponding threaded rod 5, 6 to be driven in translation relative to the rigid flange 4 and to the cover 2 and, consequently, to drive in translation each of the two nuts 13 towards the cover 2 until a tension value is reached determined from the chain 9 making it possible to firmly block the rigid flange 4 on the cover 2.

This embodiment is advantageous in that it allows a balanced adjustment of the tension of the chain 9 at each of its ends relative to the rafter 3.

Figures 8 and 9 show an alternative embodiment of the fixing device of Figures 1 and 2.

According to this alternative embodiment, the fixing device is identical to that described with reference to Figures 1 and 2 except that the chain 9 constituting the flexible link of Figures 1 and 2 is replaced by a cable including steel, including one end is connected to the nut 13 of the threaded rod 5 and the opposite end comprises a ring 19 fixed between the two parallel legs 6a by means of the bolt 14. FIGS. 8 and 9 also show that the end of the cable 9 is connected to nut 13 by means of a ring 20 secured to this end and fixed by welding to nut 13.

Otherwise, the cable tension adjustment 9 to tighten the rigid flange 4 under the roof covering 2 operates in the same manner as described with reference to Figures 1 and 2 using the assembly to nuts 10, 13 and threaded rod 5. It is therefore unnecessary to describe this mode of cable tension adjustment 9 again.

Figures 10 and 11 show another embodiment of the fixing device of the invention.

According to this embodiment, the device for fixing the rigid flange 4 carrying the anchoring member 1 on the roof covering 2 is identical to the fixing device described with reference to Figures 1 and 2 and therefore will not not detailed again.

The fixing device of Figures 10 and 11 differs from that of Figures 1 and 2 only by the structure of the anchor member 1 formed in this case by a safety hook, known per se, ensuring not not only an anchor point to which personal protective equipment against falls from a height worn by a person working on the roof cover 2 can be attached, but also the function of maintaining a ladder on the cover 2.

The safety hook forming an anchoring member 1 has a wall or web 1d formed in the angled part 1e of the hook. An orifice 1c constituting the anchor point of the personal protective equipment of the person working on the cover 2 is formed through the wall 1d and is delimited by a flat wall 1f for connection between the rectangular plate of the rigid flange 4 and the upper branch 1g of the hook 1 inclined from the bottom upwards relative to the rigid flange 4. The hook 1 thus defined extends in a longitudinal median plane of the rigid flange 4. The wall 1d is frangible or fusible, it that is to say that following a shock applied to the wall 1d by the carabiner for anchoring the personal protective equipment and due to a fall in height from the person wearing this equipment, the wall 1d breaks. This fuse part constitutes a sort of visual indicator making it possible to avoid reusing the anchoring hook once the fuse has broken and to replace it with another.

Adjusting the tension of the chain 9 of the embodiment of Figures 10 and 11 operates in the same manner as described with reference to Figures 1 and 2 and will therefore not be further detailed.

Figures 12 to 14 show a device for fixing the rigid flange 4 on the roof covering 2 using tie rods 5, 6 identical to those previously described with reference to Figures 10 and 11 and comprising the same device anchor 1 to the safety hook of these figures.

The difference between the fixing device 12 to 14 and that of Figures 10 and 11 relates to the fact that the rigid flange 4 carrying the safety hook 1 is fixed on a roof covering 2 consisting of corrugated fiber cement and not not on a flat cover. More specifically, the rigid flange 4 is fixed to the bottom of the concave part of a half-wave of the cover 2 by means of a sealing layer 17 identical to that described with reference to FIGS. 4 and 5 and of which the convex face is supported on a fault 3 of the roof covering with the rigid flange 4 extending transversely to this fault. The sealing layer 17 can be made from a foam material or an elastomeric material and ensures the sealing in particular of the holes 7, 8 of the roof covering 2 crossed respectively by the threaded rod 5 and the two tabs 6a forming a tie 6, which also pass through the sealing layer 17 as in FIGS. 4 and 5.

The tension adjustment mode of the chain 9 of the device of Figures 12 to 14 is identical to that already described in particular with reference to Figures 1 and 2 and will therefore not be further detailed.

FIG. 15 represents an alternative embodiment of the fixing device of FIGS. 10 and 11.

According to this alternative embodiment, all the elements of this fixing device are identical and perform the same function as those described with reference to Figures 10 and 11. The only difference concerns the safety hook constituting the anchoring member 1 which does not have in its curved part 1e a frangible or fusible wall so that this curved part 1e defines with the wall 1f connecting the inclined branch 1g to the flange 4 that the orifice 1c constituting the anchor point of the personal protective equipment against falls from a height worn by the person working on the roof cover 2.

It is useful to detail again the mode of tension adjustment of the chain 9 to tighten the rigid flange 4 on the roof covering 2 since identical to that previously described in particular with reference to FIGS. 1 and 2.

Figures 16 and 17 show another embodiment of the device for fixing an anchoring member on a roof covering 2 of a building or other building and different from those previously described.

According to this embodiment, the rigid flange 4 intended to be fixed to the flat roof covering 2 carries an anchoring member 1 in the form of a ring extending in a longitudinal median plane of the rectangular plate of the flange 4 which comprises two tie rods 5, 6 constituted by rigid lugs secured, for example by welding, to the flange 4 extending perpendicularly from its internal face in abutment on the flat roof covering 2.

The two tabs 5, 6 forming tie rods respectively pass through two rectangular orifices 7, 8 of the cover 2 extending on either side of the beam 3 formed in this case by a rafter of the roof structure by being parallel to the two lateral faces of the rafter 3.

The flexible link 9 is constituted by a strap, for example made of canvas, the two ends of which are fixed to the ends respectively of the two tabs forming tie rods 5, 6 so as to pass under the rafter 3.

The strap 9 is in fact made up of two parts 9a, 9b, one of which is fixed to a metal self-locking locking loop 30 and the other being engaged in this loop which constitutes a means for tensioning the strap under the beam using the strand 9c coming out of the loop 30 in order to block the rigid flange 4 on the roof covering

2.

The use of a self-locking locking loop for exerting traction on the strap 9 is known per se and need not be detailed.

Figures 18 to 22 show a method for mounting a device for fixing a safety anchor member 1 on a roof covering 2 of a building or other building.

This method will be described with reference to the fixing device as shown in Figures 1 and 2, but it is understood that it can also be applied to the fixing devices described with reference to Figures 4, 5, 8 -15.

This method requires the use of a tool 40 in the general form of a rod comprising a rectilinear part 41, one end of which carries a maneuvering ring 42 and a cambered part 43, the free end of which carries a permanent magnet 44.

First, as shown in Figures 18 and 19, the rigid flange 4, which is provided with its tie rod assembly 5, 6, anchoring member 1 retained at the flange 4 between the nut 10 and the spacer ring 12 crossed by the threaded rod forming a tie 5 carrying the chain 9, is disposed relative to the roof covering 2 so as to introduce into the circular orifice 7 of the cover 2 the chain 9 then the threaded rod 5, the drilling 7 being positioned relative to the beam 3 constituted in the present case by a chevron, so that the chain 9 hangs with the threaded rod 5 on one side of the beam 3 as visible in FIG. 19.

Figures 18 and 19 also show that the tabs 6a forming the tie rod 6 are offset relative to the orifice 8 of the roof covering 2.

Then, as shown in Figure 20, the tool 40 is introduced through the orifice of the roof covering 2 by first passing its arched part 43 and then its straight part 41 until the gripping ring end 42 is blocked in the orifice 8. Thus, the straight part 41 of the tool 40 extends substantially perpendicularly under the roof covering 2 on the side of the rafter 3 opposite to that where is the hanging chain 9 and the arched part 43 is located at a level below the rafter 3.

By maneuvering the tool 40 with the grip ring 42, the permanent magnet 44 is brought to come close to the lower end part of the chain with magnetic property which is then attracted and gripped by the permanent magnet 44 as shown in FIG. 20.

Then the tool 40 is pulled using the grip ring 42 through the orifice 8 of the roof covering 2 until the arched part 43 and its permanent magnet 44 is out orifice 8 above the roof covering 2 in order to extract the end of the chain 9 through the orifice as shown in FIGS. 21 and 22.

The operator can finally grasp the end of the chain 9 to fix it between the two legs 6a of the tie rod 6 by means of the bolt 14 after having, of course, removed the magnet 44 from this end. The operator can then introduce the two tabs 6a of the tie rod 6 into the orifice 8 of the roof covering 2 to arrive at the position of the fixing device as shown in FIG. 1 in order to then exert tension on the chain 9 using the nut 10 for locking the rigid flange 4 on the roof covering 2.

The above described steps of the mounting method with reference to Figures 18 to 22 also apply to the fixing device shown in Figure 7, that is to say that the tool 40 will capture the using its permanent magnet 44 the hanging end of the nut chain 13 associated with the threaded rod 6 forming a tie comprising the anchoring member 1. Once the free end of the chain 9 with nut 13 exits through of the orifice 7 of the roof covering 2 in the manner shown in Figures 21, 22, the operator will only have to screw the free end of the threaded rod 5 into the nut 13 of the chain 9 to introduce the end part of the threaded rod 5 through the orifice 8 to end up with the assembly as shown in FIG. 7 after having operated the nuts 10 in order to move the nuts 13 of threaded rods 5, 6 upwards to then ensure the tensioning of the chain 9 making it possible to block the rigid flange 4 on the roof covering 2.

It should be noted that the mounting of the fastening devices shown in Figures 6 and 16, 17, instead of being carried out completely above the roof covering 2 as described above, is carried out as follows.

Regarding the embodiment of Figure 6, the operator located above the roofing 2, introduced on the one hand the threaded rod 5 through the orifice 7 of the cover 2 and on the other hand the chain provided at its free end with the nut 13 to be associated with the threaded rod 5 and the ring forming a tie 6 through the orifice 8 of the cover 2 so that the chain and its nut end 30 hangs from one side of the beam 3 while the threaded rod will be located on the opposite side of this beam.

Then, the operator goes into the attic of the roof structure to assemble the nut 13 at the end of the chain 9 along the threaded rod 5 and the head 18 can be operated from above. of cover 2 to tighten the chain 9 until it locks the rigid flange 4 on cover 2.

Regarding the embodiment of Figures 16, 17, the rigid flange 4 provided with its two parts of free straps 9a, 9b is disposed above the roof covering 2 so as to introduce respectively through the two orifices 7, 8 of the cover 2, the two straps 9a, 9b and the two tabs 5, 6 forming tie rods. Then the operator goes into the attic of the roof structure to assemble the two strap parts 9a, 9b to the self-locking locking loop 30 and by traction exerted on the free end strand 9c of the strap part 9b, the operator can tighten the strap 9 under the beam 3 by the loop 30.

Of course, various modifications can be made to the fixing devices described above without departing from the scope of the invention. For example, the fixing device of Figures 8 and 9 may include a safety anchor hook instead of the anchor member 1 of these figures. Similarly, the embodiment of the figure

7 may also include a safety anchor hook with or without a fuse instead of the anchor member 1 shown in this figure.

The various fastening devices described above of an anchoring member on a roof covering of a building or other building make it possible to mount the anchoring member on a fragile roof of the fiber cement type, unlike previously known fixing devices. Most of the above-described devices of the invention make it possible to mount the anchoring member completely from above the roof covering.

Claims (17)

1. Device for fixing a safety anchoring member (1) on a cover (2) of a roof of a building supported by structural beams of the roof, characterized in that it comprises a flange rigid (4) carrying the anchoring member (1), disposed on the roof covering (2) and comprising two tie rods (5,6) integral with the rigid flange (4) under it passing through two orifices ( 7,8) of the roof covering (2) so as to be located on each side of a beam (3), a flexible link (9), the ends of which are integral with the two tie rods (5,6) and passing under the beam (3), and at least one means of tensioning the flexible link (9) under the beam (3) to exert on the two tie rods (5,6) a force for tightening the rigid flange (4) on the roof covering (2). 2. Fastening device according to claim 1, characterized in that the flexible link is a chain or a cable (9) and at least one (5) of the two tie rods (5,6) is a threaded rod constituting the means tensioning chain or cable (9) and a portion passing through the rigid flange (4) is retained axially to this flange and the remaining portion located on one side of the beam (3) extending substantially perpendicular to this flange has a first nut (13) to which the corresponding end of the chain or cable (9) is secured to allow the tension of the chain or cable (9) to be adjusted by operating the threaded rod ( 5). 3. Fastening device according to claim 2, characterized in that the other tie (6) is a threaded rod also constituting the tensioning means of the chain or cable (9) and of which a portion passing through the rigid flange (4) is retained axially on this flange and the remaining part located on the opposite side of the beam (3) extending substantially perpendicular to this flange comprises a first nut (13) to which the other end of the chain is secured or cable (9) to also allow the tension of the chain or cable (9) to be adjusted by operating this threaded rod (6). 4. Fastening device according to claim 2 or 3, characterized in that the part of each threaded rod (5,6) is retained axially to the rigid flange (4) by a second nut (10) of the threaded rod and in support on the rigid flange (4), which second nut (13) can be rotated relative to the rigid flange (4) to exert traction on the threaded rod allowing the tension of the chain or cable (9) to be adjusted ) under the beam (3). 5. Fastening device according to claim 2 or 3, characterized in that the part of each threaded rod (5,6) is retained axially to the rigid flange (4) by a head (18) integral with the end of this threaded rod and supported on the rigid flange (4), which head (18) can be rotated relative to the rigid flange (4) to move the first nut (13) along the threaded rod (5,6) and allow adjustment of the chain or cable tension (9) under the beam (3). 6. Fastening device according to claim 2, characterized in that the other tie (6) is constituted by at least one rigid tab (6a) secured by welding of the rigid flange (4) perpendicular to the latter and the other end of the chain or cable (9) is fixed to the end of the rigid tab (6a) by means of a bolt (14). 7. Fastening device according to claim 4 or 5, characterized in that the anchoring member (1) consists of a lug comprising a flat part (1a) fixed to the rigid flange (4) coaxially with one or the other of the two threaded rods (5,6) via the second nut (10) or the head (18) of the threaded rod and a bent part (1b) projecting from the rigid flange (4) above it and having a hole (1c) forming an anchor point for hanging personal protective equipment against falls from a height. 8. Fastening device according to claim 6, characterized in that the anchoring member (1) is constituted by a safety hook secured to the rigid flange (4) on the latter in line with the rigid tab (6a ) forming a tie rod (6) and comprising a hole (1c) forming an anchor point allowing the attachment of personal protective equipment against falls from a height. 9. Fastening device according to claim 8, characterized in that the safety hook (1) has in its opening forming an anchor point a frangible part (1d). 10. Fastening device according to claim 1, characterized in that the flexible link is a strap (9) and the two tie rods (5,6) are constituted by rigid lugs secured by welding the rigid flange (4) perpendicular to the latter, the strap (9) being fixed by its two ends respectively to the two ends of the two lugs (5,6) and comprising a self-locking locking loop (30) constituting the means making it possible to tension the strap (9) under the beam (3). 11. Fastening device according to claim 10, characterized in that the anchoring member (1) consists of a ring secured to the rigid flange (4) above the latter in vertical alignment with one of the legs forming a tie (6) and forming an anchor point for hanging personal protective equipment against falls from a height. 12. Fastening device according to claim 3, characterized in that the rigid flange (4) comprises a sheath (16) integral with the internal face of this flange located opposite the roof covering (2) through the orifice corresponding (7,8) of the cover (2) and being inclined relative to this internal face and crossed by the corresponding threaded rod forming a tie (5,6) so as to avoid buckling of the threaded rod during tensioning chain or cable (9) under the beam (3). 13. Fastening device according to one of claims 1 to 12, characterized in that a sealing layer (17), for example made of foam or elastomer material, is interposed between the rigid flange (4) and the cover of roof (2). 14. Fastening device according to one of claims 1 to 13, characterized in that the rigid flange (4) is in the form of a rectangular plate extending transversely to the beam (3) above the latter, which can be a roof rafter. 15. Fastening device according to one of claims 7 to 14, characterized in that the anchoring point (1) is located substantially at one of the orifices (7,8) of the roof covering (2 ). 16. Fastening device according to one of claims 1 to 15, characterized in that the roof covering (2) is made of fiber cement. 17. A method of mounting the device for fixing a safety anchoring member (1) as defined in any one of claims 2 to 9 and 12 to 16 on a roof covering (2) of a building supported by structural beams of the roof, characterized in that it comprises the stages of: introduce through one (7) of the holes in the roof covering (2) the chain or cable (9) and the associated threaded rod forming a tie (5) passing through the rigid flange (4) so that the chain or the cable (9) hangs from one side of the beam (3) below the latter, introduce through the other orifice (8) of the roof covering (2) a tool in the form of an arched rod ( 40) of which one free end carries a permanent magnet (44) so as to magnetically grip the end of the chain or of the pendant cable (9), 5 - exert traction on the tool (40) to allow the passage of the end part of the chain or of the cable (9) secured to the magnet (44) of this tool through the other orifice ( 8) from the roof covering (2), separate the end part of the chain or cable (9) from the magnet (44) and secure this end part to the other tie rod (6) of the rigid flange (4), and 10 - introduce the other tie rod (6) through the hole (8) so that the chain or cable (9) is located in a loop under the beam (3). 1/12 -lk 3/12 5/12 6/12 7/12 id 1g 1 8/12 9c 12/10 11/12 g 12/12