FR2568305A1 - DEVICE FOR PROTECTION AGAINST PERFORATING TOOLS AND COMPOSITE WALL PROVIDED WITH SAID DEVICE - Google Patents

Abstract

1. Device for protection against perforating tools such for instance as coring tools and of the type comprising a support fitted with balls (2) incorporated and mounted for free rotation in this support, characterized in that the said support consists of at least one grating (G) the openings of which ensure the positioning and/or the fastening of closed boxes (3) containing each one a bal (2).

Description

The present invention essentially relates to a

  protection device against perforating tools

  cladding for example the form of diamond crowns.

  It also aims a composite wall provided with this device.

  It has already been proposed to incorporate into a trunk wall

  for example, balls which, under the effect of an

  with a perforating tool, start rotating

  so that the kinetic energy of the tool will be of

  absorbed by the rolling of the balls preventing or delaying further penetration of the tool into

the trunk wall.

  However, the beads used were of relatively small diameter. Moreover, they were divided into

  the wall in a somewhat random way and they

  a certain degree of freedom in the horizontal plane

  tal, so that they could not play the role of an effective barrier to punching tools with

large diameters.

  The present invention aims in particular to remedy

  to the above problems by proposing an improved

  protection against attacks with perforating tools, this device being of remarkable efficiency, in particular by the fact that the balls are incorporated and distributed in the wall in a very particular way.

  way to resist ideally the attacks of

perforating tools of large diameter.

  For this purpose, the subject of the invention is a device for

  protection against piercing tools, such as, for example,

  the coring tools, and of the type comprising a

  port provided with balls incorporated and mounted freely rotatable in this support, characterized in that said balls are each housed in a closed casing integral with said support, the set of ball casings forming a configuration

  regular checkerboard in this bracket.

  According to another characteristic of the invention, the abovementioned support consists of at least one grid or the like whose openings ensure the positioning

  and / or the fixing of the aforementioned housings.

  The aforementioned support or grid is integral with a base plate by means of fixed spacers, for example welded, both on the grid and on said plate. According to a preferred embodiment, a second grid is fixed on these spacers and cooperates with the aforementioned base plate to position the ball housings

  between this second grid and said plate.

  According to yet another characteristic of the invention, the housings containing the balls comprise tabs, projections or the like ensuring their attachment on the grid

  cited first and constituting the support.

  It will be added here that the closed housings contain

  the balls have a circular or poly-

  gonale and can form a single piece or behave

each one a body and a lid.

  According to another characteristic of the device of the in-

  As a result, the spacers consist of plates welded at their edges to the base plate and to the grids. The diameter of these beads is preferably close to 30 millimeters, while the distance between the axes of two adjacent balls following a diagonal is included

  between about 40 and 60 millimeters.

  The invention also relates to a composite wall provided with

  of a device meeting one or other of the characteristics

  above-mentioned ticks and to which a material is added

  castable, such as for example concrete, synthetic rubber

that or the like.

  But other advantages and characteristics of the

  vention will appear better in the detailed description

  following and refers to the accompanying drawings, given only

  by way of example, and in which: - Figure 1 is a partial view in elevation and in

  section along the line I-I of FIG.

  posite comprising a device according to the principle of the invention, and Figure 2 is a top view of this wall and according to the section taken substantially along the line II-II

of Figure 1.

  According to the exemplary embodiment shown in the drawings, a wall (1) equipped with a protective device

  in accordance with the principle of the invention

  freely rotatable balls (2) in this

  wall while being firmly held in the horizontal plane

  zontal. More specifically, each ball (2) is housed in a closed box (3) which is made of a suitable material, such as for example a plastic material. The balls (2)

  can rotate freely in their respective housings (3).

  As can be seen more clearly in FIG. 2, the housings 3 are recessed and positioned in the openings 4 of a grid 4 which, according to the embodiment shown, is constituted by metal wires. (5) interlaced

  perpendicular to each other.

  The side wall of the housings (3) comprises tabs, projections or the like (6) which are clearly visible in Figure (1) and which allow the attachment of the shoemakers (3) on the wire (5) of the grid G As can be seen in FIG. 2, all the closed housings (3) form a regular checker pattern in the grid, as shown in A, B, C, D, E and F. The grid G is secured to a base plate (7) via spacers (8) fixed on both the grid G and the base plate (7). More precisely,

  the spacers (8) consist of metal plates

  welded by their edges on the baseplate (7) and on the Grille grid it has been shown respectively in (9)

and (10) in Figures 1 and 2.

  The housings (3) can be made in one piece, forming a cage for the balls (3), or can be made in two parts, as shown in the figures, and namely a body (3a) and a lid

  (3b). Also, the housings (3) can present in sec-

  cross section a circular shape, or a polygonal shape, such as square for example, if the openings (4) of the grid G are square. To illustrate these two configurations, it is shown in Figure 2, and quite right of this figure, a housing (3) which has a square shape, while the housing (3) which is on the same line and to the left of the square case, has a circular shape. But in both cases, the housing (3) remains firmly positioned in the plane by the openings of the grid G as well as the ball (2) contained therein and

  which turns freely in said housing.

  x A second grid H visible in FIG. 1, also constituted for example by metal wires (11)

  and (12) intertwined perpendicularly is arranged

  above the assembly formed by the housings (3), the gate G and the base plate (7). More specifically, the grid H is fixed, for example welded at 13 on one of the edges of the spacers or sheets (8). Thus, the housings (3) are positioned in the grid G between the grid H and the base plate (7). And all the assembly is secured by the spacers (8) welded to the plate (7), the grid H and the grid G in the openings (4) which are mounted closed housings (3) containing the

balls (2).

  The diameter of the balls (2) is preferably close to 30 millimeters. As for the distance (d) between the axes

  two adjacent balls (2) diagonally, such as -

  as can be seen in FIG. 2, it is preferably

  between about 40 and 60 millimeters.

  Returning to Figure 1, we see that a flowable material

  (14), such as, for example, concrete or synthetic rubber.

  that, is added to the set described above. Thus, all the assembly is embedded in this material with the exception of the balls (2) enclosed in their housings (3) so that

  these are always free in rotation in the bolts

third.

  It has therefore been realized according to the invention a composite wall

  site (1) which can for example equip a safe and which includes balls positioned in a checkerboard configuration and firmly held in the horizontal plane

  thanks to the buildings (3) which contain them and which are

  in the openings of the grid G. Thus, in case of attack by a perforating tool in the direction shown by the arrow (15), the balls (2) will remain subject to the attack of the tool and turn under the effect of the rotation of the tool which can not therefore, or which can very easily, cross from

part of the wall (1).

  It has therefore been realized according to the invention an integral wall.

  secondly provided with an arrangement of very particular means and combined in a very special configuration, so that said wall constitutes an extremely dam

  effective penetration of perforating tools, and in particular

  diamond rings having a large diameter.

  The invention is in no way limited to the method of

  described and illustrated which has been given only as an example

  ple. On the contrary, the invention includes all the technical equivalents of the described means as well as their combinations

  if they are done according to his spirit.

Claims (9)

R E V E N D I C A T I 0 N S CLAIMS   1. Protection device against piercing tools,   such as, for example, coring tools, and of the type   taking a support provided with balls incorporated and mounted to   free rotation in this support, characterized in that   said balls are each housed in a closed housing   said support, the set of ball casings   a regular checkerboard configuration in this support.   2. Device according to claim 1, characterized in that said support is constituted by at least one   grid or the like whose openings ensure the position   and / or the fixing of the above-mentioned housings.   3. Device according to claim 1 or 2, characterized in that the support or said grid is secured to a base plate by means of spacers fixed by   examples welded, both on the grid and on said plate.   4. Device according to one of claims 1 to 3,   characterized by a second grid fixed on the spacers and cooperating with the abovementioned base plate for positioning the bead housings between this second gate and said plate.   5. Device according to one of the preceding claims   tes, characterized in that the housings containing the balls comprise tabs, projections or the like ensuring their attachment to the grid quoted in the first place and constituting the support.   6. Device according to one of the preceding claims   tes, characterized in that the closed housings mentioned above   feel a circular or polygonal section and form a   single piece or each have a body and a cover key.   7. Device according to claim 3 or 4, characterized   in that the abovementioned spacers are plates welded at their edges to the base plate and to the grids.   8. Device according to one of the preceding claims   tes, characterized in that the diameter of the aforementioned balls is close to 30 millimeters, while the distance between the axes of two adjacent balls along a diagonal is   between about 40 and 60 millimeters.   9. Composite wall provided with a device according to one   any of the preceding claims and to which   a flowable material, such as, for example, concrete, rubber synthetic rubber or the like.