FR2774515A1 - Aerial mounting bracket for use on pylon or building with inclined surface - Google Patents

Abstract

The bracket has an inclined joint, enabling rotation to compensate for any inclination of supporting surface. The mounting for the support of an aerial (M) is attached to an inclined surface (S). The mounting comprises a first component (3) fixed to the inclined support surface (S) and a second component (5) fixed to the base of the aerial (M). These two meet at flanged ends, each mounted an angle to the respective axes of the components. The first part (3) is mounted to rotate about an axis (X1-X1) perpendicular to the support surface (S), and the second is mounted to rotate w.r.t. the first part about a second axis (Y-Y). These two rotational adjustments allow the aerial mount (M) to be aligned in a required direction, even though the base (3a) is mounted on the inclined surface.

Description

DEVICE FOR FIXING A SUPPORT OF AN SUCH ELEMENT
ONLY AN ANTENNA ON AN INCLINED SUPPORT SURFACE
The present invention relates to a device for fixing a support of an element such as an antenna on an inclined bearing surface.

 In the telecommunications field, the fixed antennas are generally carried by a support fixed on a rigid support surface. When the antenna support is a mast for example, it is necessary that this mast is mounted along a predetermined axis, for example vertical, which serves as a reference axis for the orientation of the antennas.

 An antenna installer does not encounter major difficulties in fixing a mast in a vertical position, for example, when the support surface is almost horizontal.

 In practice, it is quite different. Indeed, the bearing surface of the structure which is to carry the mast varies from one implantation site to another. For example, this structure can be either a wall, a terrace or a building parapet, as well as a kiosk or a fruit pylon. Such structures have their own characteristics which can be justified on a functional level and / or on an architectural aesthetic level. For example, a building terrace always has a certain slope to ensure the flow of rainwater.

 Concretely, it follows that the bearing surfaces most often have a certain slope, which the installer must imperatively take into account when mounting and fixing a mast in a vertical position or in any other position.

 To solve this problem, installers currently use two types of solution, in particular in the case where the inclined bearing surface is that of a building terrace.

 A first solution consists in erecting a concrete block on the support surface to compensate for or make up for the slope of the terrace, then using a conventional fixing device to fix the mast on the concrete block. The disadvantage of this solution lies in the setting time required for concrete, so that the installation of the mast cannot be done from the first intervention on the installation site.

 A second solution consists in using a fixing device whose inclination is adjusted by means of threaded rods to compensate or make up for the slope of the terrace. This solution has the disadvantage of not giving sufficient mechanical rigidity to the assembly, in particular under the action of the wind, since all the efforts are concentrated at the level of the threaded rods.

 Concretely, an installer is always faced with the problem of defining the fixing device which will be best suited to compensate for or compensate for the slope of a predetermined bearing surface.

 The object of the invention is to provide a versatile fixing device which can be used whatever the slope of the bearing surface, to orient a mast in a predetermined direction, and which can give the whole all the rigidity required.

 To this end, the invention provides a device for fixing a support of an element such as for example an antenna on an inclined surface, which is characterized in that it comprises at least one first part fixed to the surface support and a second part fixed on the antenna support, in that the first part is rotatably mounted relative to the support surface along a first axis perpendicular to the support surface, and in that the second part is rotatably mounted relative to the first part along a second axis which is different from the first axis, to be able to orient the antenna support in a predetermined direction regardless of the slope of the bearing surface.

 In general, the two parts are brought into contact with each other by two first substantially flat end surfaces, and the second axis of rotation of the second part relative to the first part is perpendicular to said surfaces end.

 According to another characteristic of the invention, one of the two parts has a second substantially planar end surface, and the two end surfaces of said part are located in two non-parallel planes.

 According to one embodiment, the part which has two substantially planar end surfaces is the first part fixed to the bearing surface, and these two end surfaces form any angle less than 900, in particular an angle of around 450.

 In general, the other of the two parts may also have a second substantially planar end surface, and the two end surfaces are also located in two non-parallel planes which form any angle less than 900, in particular around 450.

 According to another embodiment, the part which is connected to the antenna support forms a one-piece assembly with the latter. In this case, the part which is fixed to the bearing surface has two end surfaces located in two non-parallel planes.

 The antenna support is generally made up of a mast, and the support surface can be made up of a building terrace or parapet, a wall, a kiosk or a fruit pylon.

 A fixing system according to the invention is a general-purpose system which can be used to directly compensate for or compensate for any slope of a support surface, so that the installer can fix the antenna support during with a single intervention, and without there being any need to first install any intermediate support on the support surface to compensate for the slope, as in the case of the first solution mentioned in preamble.

 The fixing system according to the invention also has the advantage of giving the assembly sufficient rigidity capable of withstanding mechanical stresses under the action of the wind, which is not the case with the second solution mentioned in the preamble. .

 According to yet another advantage of the invention, the fixing system makes it possible to lower an antenna support mast when it is mounted on a building terrace to allow the installer to adjust or change the 'antenna without being obliged to use a ladder, or to raise such a mast when suspended from a building parapet to allow the installer to perform the above operations without using a harness. I1 suffices for this to rotate the mast around the axis of rotation common to the two parts of the fastening system.

 The fastening system according to the invention also has the advantage of being simple, easy to manufacture and to implement, inexpensive, easily storable and transportable.

 Finally, the fixing surface of the part of the fixing system which is brought into contact with the bearing surface, is advantageously square or rectangular in shape to facilitate the resumption of the waterproofing of a building terrace after fixing. of the mast.

Other advantages, characteristics and details of the invention will emerge from the additional description which follows with reference to the appended drawings, given solely by way of example and in which:
- Figure 1 is a schematic view to illustrate a first position of a system according to the invention for fixing an antenna support such as a mast on a support surface constituted by a building terrace having a certain slope ,
FIG. 2 is a view similar to that of FIG. 1 where the fixing system occupies a second position for orienting and fixing the mast along a substantially vertical axis,
FIG. 3 is a view similar to that of FIG. 2 to illustrate a third position of the fixing system for bringing the mast back into a substantially horizontal plane,
FIG. 4 is an elevation view of one of the two parts of the fastening system,
FIG. 5 is a view according to arrow V in FIG. 4,
FIG. 6 is a schematic view of a motorized fixing device, and
- Figure 7 is a simplified perspective view to illustrate an adjustment tool used to mount a mast in a vertical position.

 Or an antenna support such as a mast M to be mounted vertically on the support surface S of a terrace T of a building for example, knowing that this support surface S is inclined at an angle x by compared to the horizontal.

 In the embodiment illustrated in Figure 1, the fixing system 1 of the mast M essentially comprises two parts 3 and 5 generally similar.

 The part 3 is constituted by two plates 3a and 3b forming end surfaces or flanges which are connected to each other by a body or upright 3c. The two plates 3a and 3b form an angle al between them, and the upright 3c extends along an axis X1-X1 which is perpendicular to the plate 3a and to the bearing surface S.

The part 5 is also constituted by two plates 5a and 5b forming end surfaces or flanges which are connected by an upright 5c, the two plates 5a and 5b forming an angle a2 between them, and the upright 5c extending along a axis X2-X2 perpendicular to the plate 5a. These two angles a1 and a2 are less than 900 and not necessarily equal.

 We assume that the angles al and t2 are equal and have a value of the order of 450.

 As illustrated in FIG. 1, suppose that the installer fixes the end plate 3a of the part 3 on the support surface S, then fixes the end plate 5b of the part 5 on the plate 3b of the part 3. The two plates 3b and 5b form flanges which are fixed to each other by any conventional fixing means, such as bolts for example. With such an arrangement, if the two axes X1-X1 and X2-X2 of the two parts 3 and 5 are axially aligned with each other, the plate 5a of the part 5 will lie in a plane parallel to the surface support S.

Under these conditions, if the mast M is fixed to the plate Sa of the part 5 and perpendicular thereto, the mast will be oriented along an inclined axis which coincides with the axes X1
X1 and X2-X2. The inclination of the mast M will thus depend on the slope x of the bearing surface S.

 As explained in the preamble, such a mast M must most often be oriented along a vertical axis which serves as a reference axis for the orientation of the antennas.

 The fastening system 1 is precisely designed to compensate for or compensate for the slope x of the support surface S and allow the orientation of the mast M along a determined axis, in particular vertical, as is clearly illustrated in FIG. 2. To obtain this orientation, at least the part 5 of the fixing system must be pivoted relative to the part 3 about a common axis YY which is perpendicular to the two contact surfaces 3b and 5b of the two parts 3 and 5, until positioning the flat surface 5a in a substantially horizontal plane.

 To this end, the part 5 is rotatably mounted relative to the part 3 by means of a central pin 10 (FIG. 4) projecting from the surface of the plate 3b and which enters a corresponding hole drilled in the plate 5b of Exhibit 5, or vice versa.

 In general, it is necessary to rotate the part 3 around the axis X1-X1 simultaneously with the part 5 around the axis YY, to position the planar surface 5b of the part 5 in a substantially horizontal plane, l angle of rotation of the parts 3 and 5 being a function of the value of the angle of inclination x of the bearing surface S and of the value of the angles al and a2 of the parts 3 and 5. Of course, the simultaneous rotation parts 3 and 5 can be made so as to position the flat surface 5a of the part 5 in a plane which is not necessarily horizontal, the inclination of this plane being determined by the direction in which it is desired to orient the mast.

 Referring to Figure 5, each end plate 3a and 3b of the part 3 can advantageously have curved lights 1 towards its periphery, for example four in number, to guide the part 3 during its rotation, a fixing means being positioned in each of the lights before being fixed at the end of the adjustment. In an analogous manner, the end plate 5b of the part 5 also has lights 1 which are placed opposite the lights 1 of the end plate 3b of the part 3.

 In the example illustrated in FIGS. 1 and 2, the orientation of the mast M is obtained by rotation of the part 3 around the axis Xl-Xl which is perpendicular to the bearing surface S. However, the axis of rotation of the part 3 does not necessarily correspond to the axis X1-X1 of the part 3, as for example in the case where it would be the end plate 3b which would come into contact with the bearing surface S. D '' in general, the axis of rotation of the part 3 is perpendicular to the bearing surface S, and the axis of rotation YY of the part 5 is inclined relative to the axis of rotation of the part 3 to ability to adjust orientation of mast M in azimuth and tilt.

 Once the mast M is correctly oriented, the part 3 is fixed on the support surface S, the part 5 on the part 3 and the mast M on the part 5, with suitable fixing means such as screws, bolts,. (not shown).

 From the position illustrated in Figure 2, it is possible to fold the mast M in a substantially horizontal plane by rotating only the part 5 around the axis Y-Y. The mast M, thus folded down, is illustrated in FIG. 3. This position of the mast M is particularly advantageous, because it facilitates the mounting, adjustment and / or replacement of the antennas. Indeed, the installer can operate directly from the terrace without having to use a ladder. On the other hand, in the case where the mast is mounted along the surface of a building, it would then be possible to raise it horizontally to allow the installer to carry out the above operations without having to suspend himself a fifth wheel, for example.

 An exemplary embodiment of the part 3 of the fastening system 1, is illustrated in FIGS. 4 and 5. The angle between the plates 3a and 3b is approximately 450, and the upright 3c is tubular with a cross section of shape. any.

 In Figure 6, there is shown schematically a fixing device 1 which is motorized to allow remote adjustment of the rotational movements of the part 3 around the axis X1-X1 and of the part 5 around the axis YY .

To this end, the upright 3c of the part 3 is advantageously a tubular element with a cross section of square shape to accommodate the motorization there, in particular
- a motor M1 fixed to the internal wall of the upright 3c and the shaft of which rotates a pinion
P1 which meshes a fixed gear R1; this wheel R1 being mounted coaxially to the axis X1-X1 of the part 3 and fixed flat on the bearing surface S, and
- a motor M2 also fixed to the internal wall of the upright 3c and whose output shaft rotates a pinion P2 which meshes with a fixed toothed wheel
R2; this wheel R2 being mounted coaxially with the axis YY and fixed to the underside of the plate 5b.

 An actuator A located at a distance makes it possible to selectively control the motors M1 and M2 in order to position the plate 5a of the part 5 in a predetermined plane and thus allow the orientation of the mast M in a predetermined direction which may be any and not necessarily vertical as in the embodiment described above.

 More precisely, the motor M1 is actuated to make the adjustment in azimuth, and the motors M1 and M2 are simultaneously actuated to make the adjustment in tilt.

 It is advantageous to use a tool 20 such as that illustrated in FIG. 7, to control the abovementioned adjustment operations. This tool 20 is for example constituted by a support 22 such as a plate on which are mounted two bubble levels 23 and 24 arranged 900 from one another.

 The support 22 of the tool 20 is for example temporarily fixed on the end plate 5a of the part 5, and the rotations of the parts 3 and 5 are controlled by means of the levels 23 and 24 until the plate d end 5a is located in a horizontal plane.

 When the bearing surface is vertical and constituted by a wall for example, the angles of the two end surfaces of the parts 3 and 5 are advantageously of the order of 450 to position the mast in a vertical direction. To make this adjustment, the tool 20 advantageously comprises a tab 25 which extends perpendicular to the support 22 from the periphery of the latter and which is attached along the mast M.

 The adjustment tool 20 may also include a sighting means 30 to allow an operator to point a fixed objective relative to which the orientation of the mast M will be effected.

As a variant of the embodiment described above, the part 5 of the fixing device may very well form only one piece with the mast
M, which eliminates the plate or flange 5a and the fixing of the mast on this flange.

Claims (8)

 1. Device for fixing a support (M) of an element such as for example an antenna on an inclined support surface (S), characterized in that it comprises at least one first part (3) fixed on the support surface (S) and a second part (5) fixed on the antenna support (M), in that the first part (3) is rotatably mounted relative to the support surface (S) along a first axis (Xl-Xl) perpendicular to the bearing surface (S), and in that the second part (5) is rotatably mounted relative to the first part (3) along a second axis (YY) which is different from the first axis (Xl-Xl), in order to be able to orient the antenna support (M) in a predetermined direction whatever the slope (x) of the bearing surface (S).  2. Fastening device according to claim 1, characterized in that the two parts (3,5) are brought into contact with one another by two first substantially flat end surfaces (3b, 5b) and in that that the second axis of rotation (YY) of the second part (5) relative to the first part (3) is perpendicular to said end surfaces (3b, 5b).  3. Fastening device according to claim 2, characterized in that one (3) of the two parts (3,5) has a second substantially planar end surface (3a), and in that the two surfaces end (3a, 3b) of said part (3) are located in two non-parallel planes.  4. Fastening device according to claim 3, characterized in that the part which has two substantially planar end surfaces is the first part (3) fixed on the bearing surface (S), and in that these two end surfaces (3a, 3b) form any angle less than 900, of the order of 450 for example.  5. Fastening device according to claim 3 or 4, characterized in that the other (5) of the two parts also has a second substantially planar end surface (Sa), and in that the two end surfaces ( 5a, 5b) are located in two non-parallel planes.  6. Fastening device according to claim 5, characterized in that the two end surfaces (5a, 5b) of the other (5) of the two parts (3,5) form any angle less than 900, of l 'order of 450 for example.  Fixing device according to claim 3 or 4, characterized in that the other (5) of the two parts (3,5) is in one piece with the antenna support (M).  8. A fixing device according to any one of the preceding claims, characterized in that the adjustment of the orientation of the antenna support (M) in a substantially vertical position, is carried out by means of an adjustment tool (20 ) comprising at least two spirit levels (23,24).  9. Fastening device according to any one of the preceding claims, characterized in that the antenna support (M) is a mast, and in that the bearing surface (S) is constituted by a terrace or a parapet of a building, a wall, a kiosk or a fruit pylon.