EP0670390A1 - Locking device for an accesstrapdoor to galleries or underground works - Google Patents

Abstract

A locking arrangement for access covers to service ducts has one master cover (3) with a lock (30) operated with a key from the outside. Other slave covers interlock with the master or the frame (1) so they may only be used when the master is unlocked or moved. Covers have pins (20) fitting in slots (12) or stops welded on the frame. Slave covers are available with spring loaded bolts on one long side fitting strike plates on the frame and pins on the other locking with adjacent covers or frame. Double triangular covers also available.

Description

The present invention relates to a device for locking a hatch for access to galleries and underground civil engineering works, in particular those of telephone networks, whether said hatch is made up of one or more leaves.

Currently the works of civil engineering are closed by a hatch made up of one or more leaves coming from foundry, or carried out in mechanically welded or concrete, of rectangular or triangular shape, resting by their edges on the bottom of rebate of a sleeping frame, to which they are sometimes secured by screwing by means of bolts accessible from the outside.

The disadvantage of these devices is that anyone can have access to said works, even those closed by bolting, since it suffices to be in possession of the appropriate tools.

In addition, bolted hatches have the disadvantage that the bolts are liable to rust and seize, making it difficult to open and close them.

There are many hatch devices fitted with a lock which are intended to equip recent works, but it is not possible, from an economic point of view to replace them with existing devices, given the large number of those -this.

There are also hatch locking devices adaptable to existing hatches, but these only concern hatches made up of a single leaf pivotally mounted on the frame.

The present invention seeks to remedy these drawbacks by proposing a hatch locking device for civil engineering works, adaptable to existing hatches made up of one or more leaves and making it possible to prohibit the access of said works to unauthorized persons.

The locking device according to the present invention can be produced according to several modes, but whatever the embodiment, it is essentially characterized in that on one of the leaves of the hatch, positioned at one of the ends of the frame and which will be referred to hereinafter as "service leaf", there is suitable a lock device of known type, operable from the outside by means of a key, and on the other hand in that it comprises means making it possible to fasten the other door leaf (s) to the frame, which will be referred to below as "slave leaves", which can be operated only after removing the service leaf.

According to a first embodiment, particularly reserved for works requiring the replacement of the sleeping frame due to deterioration or oxidation, the sleeping frame comprises in its longitudinal edges horizontal grooves or stops intended to receive locking fingers disposed laterally on each of the leaves, welded to their underside.

The installation of a leaf is carried out by horizontal sliding of said leaf on the rebate rebate until its locking fingers take inclined planes leading to the engravings, or else they are embedded under the horizontal stops, according to the architecture of the frame.

When the locking fingers are inserted in the grooves or under the horizontal stops, the leaf can no longer be lifted, and the installation of the service leaf and its locking by means of the lock which it comprises prohibits the opening of the hatch.

According to a second embodiment, suitable for cases where the existing dormant frame is preserved, the slave leaves are provided on their underside, along an edge, on the one hand, with two spring locks of known type, the bolts can be inserted into strikes made under the frame of the frame, and on the other hand a battered plate projecting outwards, the edge opposite it comprising at least two anchoring fingers disposed on its face lower, perpendicular to said edge. The anchoring fingers of a leaf, slave or service, are blocked under the battered plates of the neighboring slave leaves, those of the extreme leaf taking place in strikes made under the frame of the frame.

According to a third embodiment, when the leaves of a hatch are made in two parts of approximately triangular shape, at each of the two parts of a leaf are welded, on its underside, at least two anchoring fingers, l 'one under the edge intended to be placed on the frame to be inserted under a horizontal stop welded to said frame, the other under the diagonal edge of said part and intended to take place under the corresponding edge of the second part.

Advantageously, the two parts of a slave leaf are similar, therefore interchangeable, as are two slave leaves.

The service leaf comprises a part similar to those of the slave leaves, and another provided with a lock controlling, in addition to the exit of a bolt, the exit, on the side adjacent to that comprising said bolt, a locking finger entering a strike made in the frame.

The advantages and characteristics of the present invention will emerge more clearly from the description which follows and which refers to the appended drawing, which represents several non-limiting embodiments.

• la figure 1 représente une vue partielle, en perspective et en éclaté, d'un premier mode de réalisation du dispositif de verrouillage d'une trappe selon l'invention dont les vantaux sont supposés être transparents.
• la figure 1a représente une vue partielle en perspective d'une variante de ce premier mode de réalisation.
• la figure 2 représente une vue en perspective et
  en éclaté d'un deuxième mode de réalisation du dispositif selon l'invention dans lequel les vantaux sont également supposés être transparents.
• la figure 3 représente une vue en coupe d'un détail de la figure 2.
• la figure 4 représente une vue de dessous d'un détail de la figure 2.
• la figure 5 représente une vue partielle en plan et en éclaté d'un troisième mode de réalisation du dispositif selon l'invention.

In the attached drawing:

• 1 shows a partial view, in perspective and exploded, of a first embodiment of the device for locking a hatch according to the invention, the leaves of which are supposed to be transparent.
• Figure 1a shows a partial perspective view of a variant of this first embodiment.
• FIG. 2 represents a perspective view and
  exploded view of a second embodiment of the device according to the invention in which the leaves are also assumed to be transparent.
• FIG. 3 represents a sectional view of a detail of FIG. 2.
• FIG. 4 represents a bottom view of a detail of FIG. 2.
• FIG. 5 represents a partial plan and exploded view of a third embodiment of the device according to the invention.

Referring to FIG. 1, it can be seen that a device for locking a hatch according to the invention comprises a dormant frame 1 in the bottom 10 of the rebate of which are inclined planes 11 leading to grooves 12.

The sleeping frame 1 is intended to receive two slave leaves 2 and a service leaf 3. The leaves slaves 2 each have at their lower face two locking fingers 20 arranged near their edges in contact with the frame and substantially diagonally to one another.

The service leaf 3 has on its outer edge, disposed on its underside, a lock 30 of known type, and along its opposite edge two anchoring fingers 31.

The closure of the structure is carried out initially by sliding the slave leaf 2 at the end on the bottom 10 of the rebate of the frame 1 until the locking fingers 20 take the inclined planes 11 and are inserted in the engravings 12. The next slave leaf 2 and the service leaf 3 are positioned on the frame of the frame 1 in the same manner, then the lock 30 is locked.

With reference to FIG. 1a, it can be seen that the grooves 12 can be replaced by horizontal stops 15, only one of which is visible, welded to the frame 1, this embodiment being recommended in particular when the existing structure is prefabricated and that it is not possible to make engravings in the frame.

If we now refer to Figures 2, 3 and 4 we can see that in a second embodiment each slave leaf 2 has on the one hand spring latches 21, of known type, arranged near its nearest edge service leaf 3, whose bolts 22 can be engaged in strikes 13 made under the frame of the frame 1, on the other hand anchoring fingers 23 disposed under its opposite edge, and on the other hand still under its edge comprising the latches 21, a battue plate 24, welded to the end of said edge and projecting from it towards the outside.

The service leaf 3 has anchoring fingers 32 under the edge opposite to that having a lock 30.

The closure of the structure is carried out initially by sliding the slave leaf 2 at the end on the rebate bottom 10 of the frame 1, until the anchoring fingers 23 engage in strikes 14 formed under the frame 1, then the bolts 22 of the locks 21 are engaged in the strikes 13. The following slave leaf 2 is then placed on the frame of the frame 1 and by sliding the anchoring fingers 23 are engaged under the beaten plate 24 of the slave leaf 2 at the end, then the locks 21 are actuated and the service leaf 3 is put in place, blocking the assembly.

If we now refer to Figure 5 we can see a service leaf 3 and a slave leaf 2 made up of two half-slabs, respectively 33, 34 and 25, 26, of substantially triangular shape.

The half-slab 33 of the service leaf 3 comprises a lock 30 which, in addition to the operation of a bolt 35, allows the operation of a locking finger 36 positioned perpendicularly to the bolt 35, on an edge adjacent to that comprising said bolt 35.

The half-slabs 25, 26 and 34 each have under their diagonal edge an anchoring finger, respectively 27, 28 and 37 placed under the adjacent half-slab, respectively, 26, 25 and 33, in order to prevent its lifting .

The half-slabs 34, 25 and 26, which are identical, are secured to the frame, not shown, by locking fingers 38 which are each inserted under a horizontal stop 15 as shown in FIG. 1a.

It should be noted that, whatever the embodiment, the slave leaves are interchangeable, which facilitates their replacement in the event of deterioration, and also facilitates the closing of the access to the structure.

Claims (4)

1. Locking device for an access hatch to the galleries and underground civil engineering works consisting of at least one leaf, characterized in that, on the one hand, a so-called service leaf (3) is equipped with a lock (30) operable from the outside by means of a key, and on the other hand said service leaf (3) and the other leaf (s) (2), called slave leaves, comprise means (20, 31 , 21, 23, 32, 27, 28, 37, 38) which, in association with the other slave leaves or with the frame (1) of the structure, allow the said slave leaves (2) to be joined together or to each other dormant, so that the removal of said slave leaves (2) can only be carried out after unlocking and removal of said service leaf (3). 2. Device according to claim 1 characterized in that the sleeping frame (1) comprises in the rebate bottom (10) of its longitudinal edges of the engravings (12) located in the extension of inclined planes (11), and the leaves of service (3) and slaves (2) each have at their lower face, positioned substantially diagonally with respect to each other, two anchoring fingers (20, 31) intended to be introduced into said grooves (12) by sliding said leaves (2, 3) on the rebate bottoms (10). 3. Device according to claim 1 characterized in that horizontal stops (15) are welded to the sleeping frame (1) and the service leaves (3) and slaves (2) each have at their lower face, positioned substantially diagonally l 'relative to each other, two anchoring fingers (20, 31) intended to be positioned under said horizontal stops (15).
Device according to claim 1 characterized in that the service leaves (2) each have on the one hand under an edge, parallel to said edge and to its face lower, two spring latches (21) whose bolts (22) can be introduced into strikes (13) made under the frame (1) and on the other hand, under the other edge, parallel to the first, has its lower face and perpendicular to said edge, anchoring fingers (23) capable of being either, for the slave leaf (2) at the end, introduced into strikes (14) formed under the frame (1), or, for the other slave (2) and service (3) leaves, engaged under the adjacent slave leaf (2), under a battue plate (24) disposed under its edge comprising the spring latches (21). 5. Device according to claim 1 characterized in that the service leaves (3) and slaves (2) which consist of the assembly of two half-slabs (33, 34, 25, 26) of substantially triangular shape, have under each of said half-slabs (25, 26) of the slave leaves (2) and one (34) of the half-slabs (33, 34) of the service leaf, on the one hand under their diagonal edge an anchoring finger ( 27, 28, 37) intended to be engaged under the adjacent half-slab (26, 25, 33), making it possible to reconstitute the service leaf (3) or slave (2), and on the other hand, under the lateral edge intended to rest on the sleeping frame (1), a locking finger (38) which is slidably engaged under horizontal stops welded to said sleeping frame (1), the half-slab (33) at the end of the service leaf comprising a lock (30) operating, in addition to a bolt (35), a locking finger (36) with an axis perpendicular to that of said bolt (35).

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