WO2016001516A1

WO2016001516A1 - Manhole with bolt secured by a buffer to a frame

Info

Publication number: WO2016001516A1
Application number: PCT/FR2015/051654
Authority: WO
Inventors: Sylvain Jean-Jacques Daniel Ghislain DEBUCHY; Bertrand VINET
Original assignee: Ej Emea
Priority date: 2014-06-30
Filing date: 2015-06-22
Publication date: 2016-01-07
Also published as: FR3022923A1

Abstract

The present invention relates to a manhole with a bolt secured by a buffer to a frame. According to the invention, the manhole (1) is characterised in that the buffer (3) comprises a through-hole (30) in which a pivoting pin (34) can be mounted, with pivoting controlled by a key and supporting under the buffer a latch (35) which can occupy, when the key is turned, a position for blocking the arm (14) of the bolt (12) in the position thereof for locking the buffer (3) to the frame (2) or a position for unlocking the locking arm (14) allowing the operation of the other arm (16) of the bolt (12) in order to move the locking arm (14) into the position thereof for unlocking the buffer (3) from the frame (2). The invention is useful in road equipment.

Description

Roadway view with secure lock of a stamp on a frame.

The present invention relates generally to a manhole.

Such a look includes a fixed frame embedded in the floor, a buffer or cover connected to the frame by a hinge allowing the pad to pivot between a folded position closing the opening of the frame and a standing position released from this opening to allow to a worker to access the roadway.

A lock is associated with the pad opposite its articulation to the frame and allows the locking of the pad to its folded position on the frame and the unlocking of the pad to bring it to its standing position of the opening of the frame.

The lock is in the form of an angled lever pivotally mounted on the pad and one of the arms cooperates with a latch member of a wall of the frame to perform the locking of the buffer on the frame and the other arm forms a latch handle to move the latch arm to its unlocked position and lift the pad to its upright position from the opening of the frame.

Such a lock is described in European Patent EP 0 856 611.

If this locking device of the buffer on the frame is completely satisfactory, it is however not immune to an act of malice.

Indeed, the arm forming the lock operating handle is easily accessible from the outside of the buffer occupying its locked position on the frame so that any malicious person can easily bring the lock to its unlocked frame buffer position. The present invention proposes a solution allowing, if necessary, especially during the installation of the manhole, to lock the lock at its locking position of the buffer on the frame.

For this purpose, the subject of the invention is a manhole comprising a fixed frame, a buffer connected to the frame by a hinge allowing the pad to pivot between a folded position of closing the opening of the frame and a standing upright position. of this opening and a latch associated with the pad opposite the hinge, which latch is in the form of a bent lever pivotally mounted on the pad and one of whose arms cooperates with a striker member the wall of the frame for locking the pad to the frame and the other arm forms a handle for operating the lock and lifting the pad in the unlocked position thereof and characterized in that the pad comprises a through hole in which can be mounted pivoting axis controlled by a key and carrying under the buffer a bolt that can occupy, under the action of the key, a locking position of the latch arm to its locked position age of the frame buffer or unlocking position of the locking arm allowing operation of the other latch arm to move the latch arm to its unlock position of the frame buffer.

Advantageously, the bolt comprises a rectangular flat portion pivotable in a plane substantially parallel to the upper planar web of the buffer between its two locking and unlocking positions of the latch locking arm and extending in a direction approximately perpendicular to the locking arm when the bolt is in its locking position of this arm with the free end of the bolt portion located in the immediate vicinity of the locking arm. The pivot axis has at its end opposite the bolt a form of drive adapted to cooperate with a conjugate fingerprint of the key.

The pivot axis pivots about 75 ° between its locking and unlocking positions of the latch lock arm.

The mounting hole of the pivot axis is closed by a frangible pellet can be removed by a tool to release the hole and allow mounting of the pivot axis in this hole.

The pivot pin and bolt are part of a lock kit that can be delivered with the frame and the pad.

The invention will be better understood, and other objects, characteristics, details and advantages thereof will appear more clearly in the explanatory description which will follow with reference to the accompanying drawings given solely by way of example illustrating an embodiment. of the invention and in which:

- Figure 1 is a top view of the buffer of a manhole of the invention without the lock;

- Figure 2 is a top view of the manhole with the buffer lock blocked by a bolt of the invention at its locking position of the frame buffer;

- Figure 3 is a bottom view of the manhole of Figure 2;

- Figure 4 is a sectional view along the line IV-IV of Figure 2;

FIG. 5 is a bottom view similar to that of FIG. 3 and showing the bolt of the buffer in its unlocked position for locking the lock of this buffer;

Figure 6 is a sectional view similar to that of Figure 4 and corresponding to the position of the bolt of Figure 5;

FIG. 7 is a perspective view of the buffer lock; - Figures 8 to 10 are partial sectional views of the manhole and illustrating the successive positions that takes the lock when closing and locking the stamp on the frame; and FIG. 11 is a partial sectional view similar to that of FIGS. 8 to 10 and illustrating, starting from the closed position of FIG. 10, the unlocking of the buffer on the frame to a position of the lock such that it itself forms a handle for lifting the tampon.

Referring to the figures, the reference 1 designates a manhole for embedding in a roadway and comprising a frame 2 which, according to the embodiment shown, has a generally octagonal outer shape, and a buffer or lid 3 connected to the frame 2 by a hinge 4 allowing the pad 3 to pivot between a closed position of closure of the opening 5 of the frame 2 as best shown in Figures 4 and 6 and a standing position released from this opening, not shown, allowing an intervener to access the manhole through the opening 5 of the frame 2.

As shown, the pad 3 is generally circular in shape adapted to engage in the conjugate circular opening 5 of the frame 2 to its closed position of this opening.

The buffer 3 is provided with centering tabs 6 making it possible to correctly guide and center the buffer 3 in the circular opening of the frame 2.

In the folded position of closing the opening 5 of the frame 2, the pad 3 bears against an internal peripheral rib 7 of the frame 2 by means of an elastic support 8 secured to the rib 7.

The hinge 4 may be an articulation of the ball-and-socket type 9 radially integral with the pad 3 and capable of being rotated in a housing 10 arranged in an ear external 11 of the frame 2. Such a joint is already known per se and need not be more detailed, except that it can allow the pad 3 to occupy its standing position of opening the frame at about 120 ° relatively to the frame 2 remaining connected to the frame 2. The hinge 4 can also be arranged so that in a position at about 90 ° of the buffer 3 relative to the frame 2, the buffer 3 can be extracted from this frame, if desired . But other types of joints from the buffer 3 to the frame 2 can be envisaged without departing from the spirit of the invention.

The manhole 1 is also provided with a latch 12 associated with the pad 3 opposite the hinge 4. Thus, when the pad 3 has a circular shape, the latch 12 is diametrically opposed to the hinge 4.

As best shown in Figure 7, the latch 12 is in the form of a substantially angular lever 13 at right angle, pivotally mounted on the pad 3 and which comprises an arm 14 which can cooperate with a member 15 forming a keeper and making protrusion d ^x a wall 2a of the frame 2 in the opening 5 of the latter, to effect the locking of the buffer 3 on the frame 2. The elbow lever 13 comprises another arm 16 forming an operating handle lock 12 and also a buffer 3 lifting handle when it is unlocked from the frame 2.

The latch 12 in the form of a lever 13 comprises a pivot axis 17 extending transversely to the two arms 14, 16 and which consists of the elbow 18 itself and two approximately cylindrical transverse lugs 19 projecting from both sides. of the elbow 18 of the lock 12.

The arm 14 of the bent lever 13 has at its free end a transverse bar 20 projecting from either side of the arm 14 and whose upper face 21 adjacent to the arm 14 is likely to be disposed at low clearance under the keeper member 15 as shown in Figure 4 to lock the buffer 3 on the frame 2.

The other arm 16 of the bent lever 13 has in the vicinity of its free end a transverse bar 22 projecting from both sides of the arm 16.

The latch 12 is inserted and retained in a housing 23 arranged in and under the buffer 3.

The housing 23 has, as is better apparent from Figure 1, an opening 24 opening into the upper plane web 3a of the buffer 3 and having a substantially cross-shaped conjugate to the cross shape that constitute the arm 16 and the transverse bar 22 of the latch 12 so that in the locked position of the buffer 3 on the frame 2, the arm 16 and the transverse bar 22 are housed in the conjugate opening 24 without projecting from the upper plane veil 3a of the buffer 3.

The housing 23 comprises two lugs 25 facing one another spaced apart and below the opening 24. These two lugs 25 serve as support bearings respectively to the two lugs 19 of the pivot axis 17 of the lock 12.

Once the latch 12 has been inserted in its housing 23 of the buffer 3, the crank lever 13 can pivot on the support bearing lugs 25 between a locking position of the buffer 3 on the frame 2 to which the arm 16 occupies an approximately parallel position. at the top plane veil 3a of the buffer 3 and the arm 14 extends downwards in a direction substantially perpendicular to the upper planar veil 3a of the buffer 3 with the upper face 21 of the transverse bar 20 of the arm 14 located below and near the striker member 15 of the frame 2 to prevent the lifting of the buffer 3 relative to the frame 2 in the absence of maneuvering the latch 12, and an unlocked position shown in Figure 11 to which the buffer 3 can be tilted using the operating arm 16 to its upright position of opening of the frame 2.

According to the invention, the buffer 3 comprises an orifice 30 made in the thickness of the buffer and opening into the upper plane web 3a thereof.

The orifice 30 has its bottom delimited by a wall 31 of the pad 3 and which comprises a circular pad 32 which is frangible, that is to say which can be detached by means of a tool inserted into the orifice 30 to form a bore 33 through the bottom wall 31, thereby making the orifice 30 therethrough.

The pellet 32 can be made frangible by connections of small thickness of the pellet to the wall of the orifice 30, not shown, and breaking under the shock exerted by the tool can be constituted by a small chisel introduced into the orifice 30 bearing on the pellet 32 and on which is exerted a violent force, for example by a hammer, so that the shock completely disengages the pellet 32 of the bottom wall 31 of the orifice 30.

Once the orifice 30 has been made to pass through after separation of the chip 32 from the bottom wall 31, a pivoting pin 34 controlled by a key, not shown, is mounted in the orifice 30 of the buffer 3 and carries at its protruding under the wall 31 and, therefore, under the buffer 3, a bolt 35 can occupy, under the action of the key, a locking position of the arm 14 of the latch 12 to its locking position of the buffer 3 to the frame 2 , as represented in FIGS. 2 to 4 or a release position of the locking arm 14 allowing the other arm 16 to be operated to bring the locking arm 14, by pivoting the latch 12 about the pivot axis 17, to its unlocking position of the buffer 3 of the frame 2 shown in FIG. 11.

Advantageously, the bolt 35 is made from a rigid and rectangular flat plate comprising two parallel branches 36,37 respectively of short length and of great length, connected to each other an intermediate portion bent substantially at right angles 38.

The shortest leg 36 of the bolt 35 is integral with the pivot axis 34 and the longer leg 37 of the bolt is that intended to lock the arm 14 of the lever 12 to its locking position of the buffer 3 on the framework 2.

The pivot axis 34 is constituted by a body of generally cylindrical shape including along it at least one flat 39 and the short length arm 36 of the bolt 35 has a bore 40 flat, not shown, allowing the branch 36 to be threaded on the conjugate axis of pivoting 34 to a relative level located near the bottom face of the bottom wall 31 of the orifice 30, the long leg 37 of the bolt 5 extending perpendicularly to the pivot axis 34 and in a direction substantially parallel to the upper plane of the pad 3.

The pivot axis 34 passes through the bore 33 of the bottom wall 31 perpendicularly to this wall and to its head portion 41, also comprising the flat part 39, which is supported on the bottom wall 31 via two washers respectively metal 42 and elastomeric material 43 stacked one on the other, the head 41 of the pivot axis 34 having a flange 44 resting on the metal washer 42.

Between the bottom wall 31 of the orifice 30 and the short branch 36 is interposed a metal washer 45 to flat drill, not shown, conjugated to the pivot axis 34 flat 39.

The short length leg 36 of the bolt 35 is held in axial position on the pivot axis 34 below the bottom wall 31 by a spring helical 46 surrounding the pivot axis 34 being prestressed under the branch 36 of the bolt 35.

A nut 47 is screwed onto the lower threaded end of smaller diameter 48 of the pivot axis 34 to the end of the thread and a metal washer 49 is interposed between the nut 47 and the coil spring 46 to pre-tension the latter. . The spring 46 thus remembers the washer 45 which serves to index the bolt 36 to its closed position.

In this way, the pivot axis 34 is immobilized in translation relative to the bottom wall 31 of the orifice 30 while being pivotable about its longitudinal axis relative to this wall to rotate the bolt by a limited angle. 35 whose long branch 37 moves in a plane substantially parallel to the upper planar web 3a of the buffer 3.

As is known per se, the operating key of the pivot pin 34 comprises, at one of its ends, a transverse operating arm and at its opposite end, a tubular portion with internal cavity shape conjugate to the head 41 for driving the pivot axis 34.

When the bolt 35 is in its locking position of the locking arm 14 of the latch 12, as shown in FIGS. 2 to 4, the long leg 37 of the bolt 35 extends in a direction substantially perpendicular to the locking arm 14 having its free end located in close proximity, low play, this arm to prevent the latch 12 to rotate clockwise about the pivot axis 17 by considering Figure 4 to maintain the lock 12 at its locking position of the buffer 3 on the frame 2 and to which the upper face 21 of the transverse web 20 of the arm 14 is situated below, with reduced clearance, of the latch member 15 of the frame 2. To unlock the latch 12, an operator introduces the head portion 41 of the pivot pin 34 in the conjugate fingerprint of the locking key and maneuver the latter in a direction for pivoting simultaneously the pivot axis 34 and the bolt 35 of a limited angle of rotation to completely disengage the long leg 37 of the bolt of the arm 14 of the latch 12, as shown in Figures 5 and 6 where Figure 5 shows that the bolt 35 has rotated a an angle of about 75 ° abutting on an internal rib 3b of the buffer 3. In this way, the operator can then grip the arm 16 and its bar 22 forming a handle to rotate the arm 14 in the direction of the of FIG. 6 to disengage the bar 22 from below the member 15 to the position of the latch 12 shown in FIG. then, using the 16 th arm t of the handle bar 22 swing the buffer 3 from its closed position to its upright position of opening of the frame 2.

When it is desired to close the frame 2 again by the pad 3, the latter is tilted in the direction of the arrow F around the hinge 4 to the position shown in FIG. 8 at which the edge of the transverse bar 20 of the arm 14 will come into contact with the upper edge of the latch member 15 to rotate the latch 12 clockwise as shown by the arrow F2 in FIG. 9. Then, the buffer 3 will switch and bear against the seat rib 7 of the frame 2 to close the opening 5 thereof, as shown in FIG. 10, which shows that the latch 12 has tilted along the arrow F3 to occupy its locking position of the lock. buffer 3 on the frame 2 to which the upper face 21 of the transverse bar 20 of the arm 14 is again below the striker member 15. The operator then again introduces the fingerprint of the locking key on the head 41 of the pivot axis 34 to pivot the latter and the bolt 35 to the position at which the free end of the long branch 37 of the bolt 35 is facing and in the immediate vicinity of the arm 14 to lock the latch 12 so that it can no longer pivot relative to the buffer 3.

It follows from the above description that the manhole 1 can, as desired, adopt two configurations:

A first configuration according to which the buffer 3 does not comprise a pivot pin assembly 34 and bolt 35 and comprises only the latch 12 which can then be operated by anyone from its locking position of the buffer 3 to the frame 2 at its unlocking position, thus allowing malicious persons to freely access the manhole 1 through the opening 5 of the frame 2. In this configuration, the orifice 30 of the buffer 3 remains closed by the patch 32 of the wall bottom 31;

A second configuration in which the assembly with pivot axis 34 and bolt 5 is mounted in the through hole 30 after removing the wafer 32 to allow the bolt 35, when occupying its position opposite the arm 14 of the latch 12 d prevent him from being maneuvered to his unlocking position by malicious people.

The assembly with pivot axis 34, bolt 35, and other components constituted by the washers 42,43,45,49, the spring 46 and the nut 47 is a kind of lock kit that can be delivered with the frame 2 and the buffer 3 of the manhole 1 to, if necessary, install this kit on the buffer 3 and prevent the unlocking of the lock 12 by malicious people.

This kit is extremely simple, inexpensive and can be easily installed on the pad. The invention has been described with reference to a manhole whose stamp is generally circular in shape, but it is understood that it can be applied to any other form of stamp, such as a rectangular stamp inscribing in a rectangular-shaped frame or a triangular pad inscribing with other adjacent triangular pads in a rectangular frame.

Claims

1. A manhole cover (1) comprising a fixed frame (2), a buffer (3) connected to the frame (2) by a hinge (4) allowing the pad (3) to pivot between a closed position of closure of the opening (5) of the frame (2) and a standing position disengaged from this opening and a latch (12) associated with the pad (3) opposite the hinge (4), which latch (12) is the shape of a bent lever (13) pivotally mounted on the pad (3) and one (14) of the arms (14,16) cooperating with a latch member (15) of the wall (2a) of the frame (2) for locking the buffer (3) to the frame (2) and the other arm (16) forms an operating handle for the latch (12) and lifting the buffer (3) in the unlocked position thereof , characterized in that the pad (3) comprises a through hole (30) in which a pivotable pivot pin (34) can be mounted and which, when mounted in the through hole (30), bears under the tamp (3) a bolt (35) can occupy under the action of the key a locking position of the arm (14) of the latch (12) at its locking position of the buffer (3) to the frame (2) or a position releasing the locking arm (14) allowing operation of the other arm (16) of the latch (12) to move the locking arm (14) to its unlocking position of the buffer (3) of the frame (2).

2. A manhole according to claim 1, characterized in that the bolt (35) comprises a rectangular flat portion (37) pivotable in a plane substantially parallel to the upper plane web (3a) of the buffer (3) between its two positions for locking and unlocking the locking arm (14) of the lock (12) and extending in a direction approximately perpendicular to the locking arm (14) when the bolt (35) is in its locking position of this arm with the free end of the portion (37) of the bolt (35) located in the immediate vicinity of the locking arm (14).

3. A manhole according to claim 1 or 2, characterized in that the pivot axis (34) has at its end opposite to the bolt (35) a drive (39) adapted to cooperate with a conjugate footprint of the key.

4. A manhole according to one of claims 1 to 3, characterized in that the pivot axis pivots about 75 ° between its locking and unlocking positions of the latch locking arm (14) (12). .

5. A manhole according to one of claims 1 to 4, characterized in that the hole (30) for mounting the pivot axis (34) is closed by a frangible pellet (32) which can be removed by a tool to release the orifice (30) and allow the mounting of the pivot axis (34) in this hole.

6. A manhole according to one of claims 1 to 5, characterized in that the pivot axis (34) and the bolt (35) are part of a locking kit that can be delivered with the frame (2) and the buffer (3).