DEVICE FOR FIXING AN ELEMENT ON A GRATING AND GRATING SO EQUIPPED

Abstract

The invention relates to a device for attaching an element to a grating (5) comprising at least one threaded rod (10) having at one end a transversely positioned tab (15), said tab (15) being adapted to bear against two adjacent parallel bars (6, 8) constituting the grating (5). The device includes a plate (4) having at least one opening (11) for the passage of the threaded rod (10), said opening (11) being configured to allow the threaded rod (10) to be inclined relative to the vertical, and in that the attachment of the tab (15) to the rod (10) is eccentric and in that at least one end of the tab (15) is chamfered. The invention also relates to a grating (5) equipped with at least one such device. Figure to be published with the abbreviation: Fig. 2

Description

Title of the invention: DEVICE FOR FIXING AN ELEMENT ON A GRATING AND GRATING THUS EQUIPPED

[0001] The invention relates to a device for fixing an element on a grating and to a grating equipped with such a device.

[0002] A grating is an openwork support made of metal, polymer, or wood. It allows the flow of liquids or solids by gravity while supporting a load. To achieve this, most gratings have a frame containing a plurality of spaced parallel bars that define a grid. In some embodiments, there are two perpendicular sets of spaced parallel bars, thus defining a grid pattern. Various elements such as guardrails, masts, or other supports or objects are often attached to a grating. However, particularly when the grating is located at a height, this can sometimes only be done from the upper surface of the grating, typically the one used for movement or for placing a load, because access to the lower surface is difficult or even impossible in some cases.KR-A-101 965 105 discloses a fastening device using a threaded rod with a T-shaped end, the T-shaped end bearing against the lower edges of two parallel bars of the grating. The other end protrudes from the upper face of the grating and allows for the screwing of an element. KR-A-20130 128 233 describes a hook-shaped screw, the rounded part of which engages with the lower edge of a grating bar. KR-A-102 010 187 discloses a fastening screw with two folding tabs along the central rod, these tabs extending radially to form a T-shape that bears against the lower edge of two parallel bars when the screw is locked in position.

[0003] The invention aims to provide another solution for fixing, advantageously in a removable manner, an element on a grating from the upper face of the latter, while ensuring a secure fixing preventing any detachment of the fixed element, for example during an impact or in case of overload on the element.

[0004] To this end, the invention relates to a device for fixing an element to a grating comprising at least one threaded rod having at one end a tab positioned transversely with respect to the longitudinal axis of the rod, said tab being of dimensions adapted to bear against two adjacent parallel bars constituting the grating, characterized in that the device comprises a plate having at least one opening for the passage of the threaded rod, said opening being configured to allow an inclination of the rod with respect to the vertical threaded when it is in the orifice and in that the attachment of the leg on the stem is eccentric with respect to the length of the leg and in that at least one of the ends of the leg is at least partially chamfered.

[0005] Thanks to the invention, a threaded rod is obtained whose placement between the grating bars is facilitated by the configuration of the hole in the plate, and whose transverse tab easily locks into position against the grating bars. This secures the attachment of the plate forming part of the device to the upper surface of the grating. It is then easy to mount an element onto the plate, the assembly being fixed to the grating.

[0006] Depending on advantageous, but not mandatory, aspects, such a device may include one or more of the following features:

[0007] Four orifices are distributed at the four corners of the plate.

[0008] The orifices are oblong with small rounded sides.

[0009] Each of the four orifices receives a threaded rod.

[0010] The four threaded rods are identical.

[0011] One end of each threaded rod is removably fitted with a tab.

[0012] The ends of each rod are screwed into a threaded hole formed in each leg, the tapping being eccentric according to the length of the leg.

[0013] At least two identical and parallel counterbores are made on one face of each leg.

[0014] The counterbores are made in the vicinity of the ends of each leg.

[0015] The invention also relates to a grating equipped with at least one device conforming to any one of the preceding characteristics.

[0016] The invention will be better understood and other advantages thereof will become more apparent upon reading the following description, given solely by way of non-limiting example and with reference to the accompanying drawings in which:

[0017] [Fig-1] is a partial perspective view of a grating equipped with a guardrail mounted on the grating by a fastening device according to an embodiment of the invention,

[0018] [Fig.2] is a larger-scale perspective view of the device of [Fig.1], a portion of the grating and the supported element being illustrated,

[0019] [Fig.3] is a view similar to [Fig.2] and at the same scale, without the grating,

[0020] [Fig.4] is a median vertical cross-sectional view, at another scale, of [Fig.2],

[0021] [Fig. 5] is a partial perspective view at another scale, illustrating the placement of a threaded rod on a grating when the plate constituting the device is positioned on top of the grating and

[0022] [Fig.6] is a median vertical sectional view, at another scale, of [Fig.5].

[0023] Figure 1 illustrates an example of using the device according to one embodiment of the invention. Here, a post 1 supporting barriers 2 forms an angle of a guardrail. The post 1 is fixed to a support 3, which is itself attached to a plate 4. The plate 4, which forms part of the fastening device of the invention, is removably fixed to a grating 5, partially illustrated in Figure 1, by means of the device of the invention. It is understood that the support 3 and / or the post 1 may be permanently or temporarily fixed to the plate 4. As noted in Figure 1, the plate 4 is a solid, flat plate, for example, made of metal, polymer, or composite material, and is square or rectangular in shape. In all cases, the shape and / or dimensions of the plate 4 are adapted so that it is in simultaneous support on at least several crossbeams 6 constituting the grating 5. Alternatively, the plate is perforated and / or not flat.In another embodiment, the plate is formed by a welded assembly defining an interface between the support 3 and the grating 5.

[0024] Figure 2 illustrates, on a larger scale, the portion of the grating 5 to which the plate 4 is fixed. The grating 5 comprises crossbeams 6, in the form of flat bars, parallel to each other. The crossbeams 6 are arranged so that a longitudinal edge 7 of each crossbeam 6 defines the upper principal plane P5 of the grating 5. The crossbeams 6 are connected to each other and held in position by rods 8. Several parallel rods 8 connect two adjacent crossbeams 6 and are positioned at the edges 7, so as to also define the plane P5. Thus, the principal plane P5 of the grating 5 is not solid, but gridded. Plate 4, here solid and flat, rests and is supported on several crossbeams 6 and rods 8. Thus plate 4 is coplanar with plane P5 of grating 5. The support 3 fixed on plate 4 is of variable shape and dimensions, depending on the object to be supported, whether it is a post, a mast, or other.Advantageously, but not necessarily, the support 3 is welded to the plate 4. Alternatively, the support 3 is screwed, clipped, glued or held by another means known per se on the plate 4. The device of the invention makes it possible to fix the support 3 on the grating from the upper face 9, therefore from the plane P5, of the grating 5.

[0025] In addition to the plate 4, the device of the invention comprises at least one threaded rod 10. Here, four threaded rods 10 are distributed at the four corners of the plate 4. Alternatively, there may be fewer, for example, between one and three rods 10 or more than four rods 10, depending on the dimensions and shape of the plate 4. The threaded rods 10 are inserted into through holes 11 formed at the corners of the plate 4. Here, as is particularly visible in [Fig. 5], the holes 11 are oblong with rounded short sides. Overall, the holes 11 are pill-shaped. Alternatively, they may be of another shape, for example, circular, square, rectangular, or other. In all cases, the dimensions of the holes 11 must be greater than diameter of each threaded rod 10 to allow free passage, in translation, of the rod 10 in the orifice 1 and at least its inclination with respect to the vertical when the rod 10 is in the orifice 11.

[0026] As can be seen in [Fig. 3], the rod 10 includes a nut-shaped head 12 for its operation. The free end 13 opposite the head 12 is threaded and inserted into a through-hole 14 of a lug 15. Once the rod 10 is screwed into the hole 14, the lug 15 is perpendicular to the longitudinal axis A10 of the rod 10. The lug 15 is, in this case, cylindrical with a circular base. Alternatively, it may have another shape, for example, a rectangular parallelepiped or a right prism. In all cases, the length L15 of the lug 15 must be greater than the distance D6 between two parallel and adjacent cross members 6 and the distance D8 between two parallel and adjacent rods 8 that make up the grating 5.

[0027] The opening 14 is formed in the length L15 of the leg 15 and is offset from the length L15 of the leg 15, as can be seen in [Fig. 3]. Thus, the leg 15 is divided into two unequal parts 150, 151, distributed on either side of the opening 14. A counterbore 16 is radially formed on the outer face of part 150, near the opening 14. Another counterbore 17, identical here and parallel to the counterbore 16, is formed in the outer face of part 151, near a free end 18 of the leg 15. The counterbores 16, 17 are, in the example, U-shaped. Alternatively, they are rounded-bottom grooves or counterbores of another shape. In all cases, the width of each counterbore must be greater than the thickness of a cross member 6 and a rod 8 of the grating 5. Thus the counterbores 16, 17 are placed in the vicinity of each end 18, 19 of the leg 15.Alternatively, the leg 15 is provided with more than two counterbores 16, 17 of various widths and / or positioned at various locations on the leg 15.

[0028] The end 19 of the leg 15 is, at least partially, chamfered. The chamfer 20 is formed on a portion of the end 19 that is located closest to the face 21 of the leg 15 that is opposite the face 22 provided with the counterbores 16, 17. Alternatively, both ends 18, 19 are chamfered.

[0029] Figure 4 is a cross-section showing the attachment of the device to the grating 5. It can be seen that when the plate 4 rests on the upper face 9 of the grating 5, the threaded rods 10 are positioned between two parallel and adjacent cross members 6. The tab 15 is positioned so that the lower edges 23 of the cross members 6 bear in the counterbores 16, 17. Locknuts 24 and the tightening of the rod 10 ensure that the tab 15 is locked in position against the cross members 6. Alternatively, the tab 15 can be locked in position against the rods 8 of the grating 5. The invention thus makes it possible, with minimal space requirements, to attach a support to a grating in a removable manner while respecting the various safety requirements.

[0030] The installation of the device in a grating is now described, with reference to the various figures and in particular to figures 5 and 6. After having, in a first step, inserted the threaded rod 10 by its free end 13, without the tab 15, into an orifice 11 of the plate 4, the tab 15 is screwed in a second step onto the end 13 by positioning the counterbores 16, 17 opposite the lower face 25 of the plate 4. Thus, a plate 4 is obtained equipped with at least one threaded rod 10 provided, at the lower face 25 of the plate 4, with a tab 15.

[0031] The next step consists of inserting the leg 15 between the cross members 6 and the rods 8. For this, the longitudinal axis A10 of the rod 10 is inclined with respect to the vertical V according to the double arrow F into the orifice 11 until the leg 15 passes between two rods 8 and two adjacent cross members 6. The passage is facilitated by the presence of the chamfer 20. Once the tab 15 has passed between the crossbeams 6 and is located under the crossbeams 6, the threaded rod 10 is straightened by an inclination movement in the opposite direction, according to the double arrow F. By screwing the threaded rod 10 into the tab 15 and locking with the locknuts 24, the tab 15 is locked against the crossbeams 6, the edges 23 of each crossbeam 6 being supported in a counterbore 16, 17. Thus the plate 4 is held in support on the top of the grating 5, with a minimum of bulk.The invention makes it possible to fix, in a removable manner, a support on various types and sizes of grating, from the upper face of the latter, without affecting the overall size of the grating.

Claims

Demands

1. A device for attaching an element to a grating (5) comprising at least one threaded rod (10) having at one end (13) a tab (15) positioned transversely with respect to the longitudinal axis (A10) of the rod (10), said tab (15) being of dimensions adapted to bear against two adjacent parallel bars (6, 8) constituting the grating (5), characterized in that the device comprises a plate (4) having at least one opening (11) for the passage of a threaded rod (10), said opening (11) being configured to allow an inclination (F) with respect to the vertical (V) of the threaded rod (10) when it is in the opening (11), and in that the attachment of the tab (15) to the rod (10) is eccentric with respect to the length (L15) of the tab (15), and in that at least one of the ends (19) of the leg (15) is at least partially chamfered (20).

2. Device according to claim 1, characterized in that four orifices (11) are distributed at the four corners of the plate (4).

3. Device according to claim 2, characterized in that the orifices (11) are oblong with small rounded sides.

4. Device according to claim 2, characterized in that each of the four orifices (11) receives a threaded rod (10).

5. Device according to claim 4, characterized in that the four threaded rods (10) are identical.

6. Device according to claim 5, characterized in that one end (13) of each threaded rod (10) is removably provided with a tab (15).

7. Device according to claim 6, characterized in that the ends (13) of each rod (10) are screwed into a thread (14) provided in each leg (15), the thread (14) being eccentric along the length (L15) of the leg (15).

8. Device according to claim 6, characterized in that at least two identical and parallel counterbores (16, 17) are made on a face 22) of each leg (15).

9. Device according to claim 8, characterized in that the counterbores (16, 17) are provided in the vicinity of the ends 18, 19) of each leg (15).

10. Grating (5) equipped with at least one fixing device conforming to any one of the preceding claims.

Images