FR2851777A1 - Secure access and closing device for buried rooms comprises frame comprising corner iron having four vertical and four horizontal walls, skirt fixed to corner iron forms rectangle extending horizontal walls at right angle - Google Patents

Abstract

The access device comprises a frame on which a pad rests comprising a corner iron (1) comprising four vertical walls (11,21,31,41) and four horizontal walls (10,20,30,40). A skirt (2) fixed to the corner iron forms a rectangle composed of four vertical walls (12,22,32,42) extending at a right angle the horizontal walls, the upper and lower faces remaining open. An articulation for movement of the pad on the frame comprises a guide groove in one (41) of the vertical walls in which slides an articulation ring integral with the pad. A cam shaped lower wall modifies the trajectory of the ring and a wall opposite the first locks the ring after cam action. A corner iron vertical wall (11) is modified to form, after mounting the pad on the frame, a housing only open towards the frame interior. Independent claims are included for a method of total or partial closing of the access device, a method for extraction of the pad and a method for the partial opening or closing of the access device.

Description

"SECURE ACCESS AND CLOSING DEVICES

  UNDERGROUND BEDROOMS AND IMPLEMENTATION METHODS "The present invention relates to the improvement of access and secure closure devices for buried chambers and to the methods of implementing such a device.

  These buried chambers are intended, in particular, for the storage and confinement of various equipment used in particular for operators of distribution networks such as those for water, gas, electricity or telecommunications.

  To do this, numerous designs of buffers and associated support frames exist in the prior art.

  The respective embodiments have a certain number of drawbacks relating in particular to the complexity of the articulation of the tampon and / or the impossibility of total withdrawal of the latter.

  In the field of buffers of relatively medium size and strength (for example 500 x 500 mm, class C250) and of weight such that they can be lifted by one or two people at most, this new embodiment is described. buffer particularly suited to the level of gas distribution which comprises so-called "bottomless" chambers and the closing buffer of which is often made up of a so-called "filling" cover box. Thus, such a buffer in the closed position comes to the level of the surrounding ground level, for example a sidewalk.

  To this end, the secure access and closure device for buried chambers is characterized in that it comprises: - A frame on which a pad must rest, and comprising an angle iron comprising four vertical walls perpendicular two by two and four horizontal walls also perpendicular two by two.

  - A skirt, mounted integrally with said angle, forming a rectangular parallelepiped composed of four vertical walls 5 extending at right angles to said horizontal walls of said angle, the two upper and lower faces of said parallelepiped remaining open.

  - A hinge for positioning on said frame or extracting from said frame said pad on said frame and comprising a guide groove made in one of said vertical walls of said angle iron and which can pass completely or partially through said wall , in which slides a hinge ring integral with said pad, said groove having a first interior wall 15 in the form of a cam intended to modify the trajectory of said hinge ring, the interior wall opposite the first wall being configured so as to block said round after action of said cam.

  - A vertical wall of said angle being modified 20 to form after mounting said pad on said frame a housing, for example of rectangular shape, only open towards the inside of the frame and intended to receive said hinge ring.

  Said groove has three parts, the first practically vertical, the third practically horizontal and the second allowing the junction between said first and said third part.

  The present invention also relates to a process for the total or partial closure of a buried chamber 30 characterized in that by presenting said pad vertically and perpendicular to said frame, said articulation ring facing the groove, the weight of said pad causes, under the control of the operator, said circle towards the lower part of this groove serving as a guide slide, the latter being configured so as to direct it towards said housing, that is to say towards the closed position of the buffer.

  The present invention also relates to a method 5 for total extraction of said tampon, characterized in that in order to extract the tampon, said tampon is lifted and pulled, for example by means of a retractable handle, on the substantially horizontal guide part. from said guide groove, then said buffer is raised to completely extract it from said frame in a movement generally opposite to that of its insertion.

  The present invention finally relates to a process for partial opening or partial closing of buried chambers, characterized in that when the cam begins to modify the trajectory of the articulation ring, either in insertion or in extraction, the tampon is slightly pushed forward so that said circle comes into the locking position in cooperation with the other wall of the groove opposite that of the cam, the second support line of said pad, being constituted by the upper edge of the wall vertical of the angle iron which carries said housing.

  The invention will be better understood on reading the detailed description below made with reference to the drawings in which: - Figure 1 shows the frame / skirt assembly of the device according to the invention, - Figure 2 shows a view of above the tampon, - FIG. 3 represents a retractable handle, - FIG. 4 represents a detail of the articulation of the device according to the invention, - FIG. 5 represents the position of extraction or insertion of the tampon from the device according to the invention, - Figure 6 shows the blocking position of the buffer of the device according to the invention.

  In these figures, it can be seen that the filling box forming the buffer as well as the frame mounted on which it rests are made of hot-dip galvanized and weldable steel. The frame is sealed in the ground so that the upper surface of the box, when the latter is in the closed position, that is to say resting on the frame, is flush with the ground.

  The tampon may include a retractable handle and / or a lock, both located on the same side of the tampon. On the side opposite the latter, in the lower part of the buffer 10 are fixed by welding, two hinge rings as shown in FIG. 2.

  The characteristics of the retractable handle are shown by way of example of lifting and pulling means in FIG. 3.

  In FIG. 1, the frame 1 on which the pad must rest comprises an angle iron comprising four vertical walls 11, 21, 31 and 41 perpendicular two by two and four horizontal walls 10, 20, 30 and 40 also perpendicular two by two.

  To strengthen the resistance of the frame, this angle is mounted integrally on a skirt 2 so that the horizontal walls 10, 20, 30 and 40 extend at right angles along four vertical walls 12, 22, 32 and 42, these the latter forming a rectangular parallelepiped, the two upper and lower faces of the parallelepiped remaining open.

  Generally, the walls of the angle iron and the skirt are made of the same hot galvanized steel and of a thickness close to, for example, 0.5 cm.

  The height of the vertical walls of the angle is close to 5 cm, that of the vertical walls of the skirt is close to 40 cm and the width of the bearing surface of the horizontal walls of the angle is around 5 cm.

  The dimensions mentioned are given by way of example because they can be modified according to the nature of the desired application and the resistance required.

  The angle iron of the frame 1 further comprises sealing tabs which allow the assembly formed of the angle iron and the skirt to be sealed in the ground.

  The two articulations of the invention are implemented at the level of FIG. 4, their structures being symmetrical with respect to the axis AA 'of FIG. 1.

  FIG. 4 shows a guide groove 60 produced in the vertical wall 41, and which can pass completely or partially through said wall 41 and this as a function of the thickness of the sealed frame, of the length of the articulation ring projecting at from the removable box 15 (length X in FIG. 1) and fixed to the lower end of the corresponding side of the box.

  This groove serves as a slide in which the articulation ring must slide in order to close the chamber, that is to say also put the filling box in support 20 on the four horizontal walls 10, 20, 30 and 40.

  The guide groove has an internal wall in the form of a cam intended to modify the trajectory of said articulation ring, the other opposite wall being configured so as to block said round after action of the above-mentioned cam.

  The vertical wall 11 is modified to form, after assembly of the frame, a housing 50, of for example parallelepiped shape, only open towards the inside of the frame.

  Its role is to receive the only open side, the hinge ring 30 when the tampon is closed. Being closed on the other sides essentially serves as protection for said housing and said round against sealing mortar residues and against corrosion.

  The longitudinal and transverse dimensions of this housing must be sufficient to accommodate the articulation ring without risk of adjustment or passage problem.

  In the fully closed position, the articulation ring is inserted as far as possible into said housing.

  Figures 5 and 6 describe the methods using the device according to the invention.

  By presenting the pad vertically and perpendicular to the frame, the hinge ring facing the groove, the weight of the pad causes, under the control of the operator, said round towards the lower part of this groove serving as guide slide, the latter being configured so as to direct it towards said housing 15, that is to say towards the closing position of the tampon. Provided the buffer is kept vertical, the slight change in trajectory caused by the cam does not hinder the guiding of the articulation ring towards the housing 50.

  To extract the tampon, one uses the retractable handle 20 which makes it possible to lift and pull the tampon on the substantially horizontal part of the groove then to raise the tampon in a reverse movement to that of the insertion to completely extract the tampon from the frame .

  Finally, to obtain a partial opening (or closing) 25 (opening angle of 1000 relative to the ground), it suffices when the cam begins to modify the trajectory of the articulation ring either in insertion or in extraction, to push the pad slightly forward (i.e. towards the side opposite the lock) so that said ring comes into the blocking position in cooperation with the other inner wall of the groove, opposite to that of the cam, the second support line of said buffer being constituted by the upper edge of the vertical wall of said angle iron which carries said housing.

  In another embodiment, not shown, the vertical wall 11 and the corresponding housings of the articulation ring extend beyond the walls 21 and 41. This modification is intended to increase the depth of the guide slide, c that is to say the length of the area of said round which is actually guided by the slide. A shutter flank limits the width of the groove to the desired dimensions.

  In yet another embodiment not shown, 10 returns to the frame of the first embodiment for the vertical wall 1h supporting the two said housings but the vertical walls 21 and 31 are identical to the wall 31 that is to say without guide groove.

  Unlike the previous embodiments, this groove is carried by a part separate from the frame and which is fixed for example by welding to the internal face of the vertical wall 21 at its junction with the vertical wall 11.

  A symmetrical piece is fixed in the same way to the wall 41.

Claims (10)

CLAIMS 1 / Secure access and closure device for   buried chambers, characterized in that it comprises: - a frame, on which a pad (3) must rest, and comprising an angle (1) comprising four vertical walls (11,21,31,41) perpendicular two by two and four horizontal walls (10,20,30,40) also perpendicular two by two, - a skirt (2), mounted integral with said angle iron (1), forming a rectangular parallelepiped composed of 10 four vertical walls (12, 22, 32, 42) extending at a right angle said horizontal walls (10, 20, 30, 40) of said angle iron (1), the two upper and lower faces of said parallelepiped remaining open, - an articulation for positioning on said frame 15 or the extraction from said frame of said pad (3) and comprising a guide groove made in one (41) of said vertical walls (11,21,31,41) and being able to pass completely or partially through said wall ( 41), groove in which slides a solid articulation ring area of said pad (3), said groove having a first cam-shaped inner wall intended to modify the trajectory of said articulation ring, the inner wall opposite to the first wall being configured so as to block said round after action of said cam, and - a vertical wall (11) of said angle, being modified to form after mounting of said pad (3) on said frame a housing (50), for example of rectangular shape, only open towards the inside of the frame.   2 / Device according to claim 1, characterized in that said groove has three parts, the first 9 r substantially vertical, the third substantially horizontal and the second allowing the junction between said first part and said third part.   3 / Device according to one of claims 1 or 2, 5 characterized in that said pad (3) as well as said frame are made of hot-dip galvanized steel and weldable.   4 / Device according to any one of claims 1 to 3, characterized in that the tampon comprises (3) a retractable handle and / or a lock both located on the same side of said tampon (3).   5 / Device according to any one of claims 1 to 4, characterized in that two hinge rings are fixed by welding in the lower part of the buffer (3).   6 / Device according to any one of claims 1 15 to 5, characterized in that the walls of the angle iron and the skirt are made of the same hot-dip galvanized steel and of a thickness close to, for example, 0.5 cm.   7 / Device according to any one of claims 1 to 6, characterized in that the height of the vertical walls of the angle iron is close to 5 cm, that of the vertical walls of the skirt is close to 40 cm and the width of the support surface of the horizontal walls of the angle iron is around 5 cm.   8 / A method of total or partial closure of an access device and secure closure of buried chambers according to any one of claims 1 to 7, characterized in that by presenting said buffer vertically and perpendicular to said frame, said hinge ring facing said guide groove, the weight of said buffer causes, under operator control, said ring towards the lower part of this groove serving as guide slide, this being configured so as to direct it towards said accommodation.   9 / A method of total extraction of the buffer from an access and secure closure device for buried chambers according to any one of claims 1 to 7, characterized in that said buffer is lifted and pulled, for example at using a retractable handle on the substantially horizontal guide portion of said guide groove, then said buffer is raised to extract it completely from said frame, in a movement generally opposite to that of its insertion.   10 / Method for partial opening or partial closing of a device for access and secure closing of buried chambers, according to any one of claims 1 to 7, characterized in that when the cam begins to modify the trajectory of the articulation ring either in insertion or in extraction, the pad is slightly pushed forward so that said round comes into the blocking position in cooperation with the other wall of the groove opposite that of the cam, the second support line of said pad being constituted by the upper edge of the vertical wall of said angle iron (1) which carries said housing.