FR2787488A1 - Reinforced mortise lock has reinforcing plate placed parallel to faceplate in passage zone for frame bolt - Google Patents

Abstract

Mortise lock comprises case (1) to which is fixed faceplate (2) having passages for bolts. In the passage zone (8) for frame bolt (3), reinforcing plate (10) is placed parallel to faceplate and fixed to lock case by screws (12).

Description

i

  The present invention relates to locks and relates more to

  especially with mortise locks on a safe or in the case of locks with

  multiple bolts, with several chests mounted along a common headrest.

  In a mortise lock, the headrest fixed against the face of the trunk by which the deadbolt and the latch bolt open, and which is intended to be fixed to the edge of the door leaf in a mortise from which is engaged the lock trunk, present at the passages for the bolts, and in particular at the passage for the deadbolt reduced mechanical resistance due to the lack of material caused by the

realization of said passage.

  A mortise or mortise lock must be present at the bolt,

  resistance to rupture under a force exerted in the region of the dead bolt

  mant, parallel to the plane of the headrest and perpendicular to the trunk, satis-

complying with the standards in force.

  In order to solve this problem, it has been proposed to increase the thickness of

the headrest.

  However, such a solution, especially when it is a multi-point lock, which has a rod-shaped headrest of up to 2.50 meters in length, leads to an excessive increase in weight and price.

return of the lock.

  The invention aims to create a lock of the aforementioned type, which while being of a relatively inexpensive construction, has at least one level of the deadbolt, a resistance to transverse breaking forces, satisfactory

  to European standards in this area.

  It therefore relates to a lock in particular a mortise lock, comprising at least one trunk to which is fixed a headrest in which are formed the passages for the bolts of the lock, characterized in that at least in the zone of the passage for the deadbolt, at least one element of

  reinforcement parallel to the headrest, is fixed to the lock box.

  According to particular features of the invention: - said at least one reinforcing element is constituted by at least one plate fixed inside the trunk of the lock; - Said at least one reinforcing element consists of at least one plate fixed between the trunk and the headrest; at least one reinforcing plate has a width corresponding to the internal thickness of the lock box and is provided with lateral tabs engaged in slots of corresponding shapes provided in the walls facing the box and the lock plaster, said tabs ensuring the maintenance of the reinforcement plate inside the box

  fre for the installation of the headrest.

  The invention will be better understood with the aid of the description which follows.

  vre, given only by way of example and made with reference to the drawings an-

  attached, on which: - Fig.1 is an elevational and sectional view of a lock box provided with reinforcing elements according to the invention; Fig.2 is a partial perspective view with cutaway, on a larger scale, of the lock box of Figure 1 showing the reinforcing elements in more detail; and - Fig.3 is a sectional view on a larger scale of a lock

  comprising reinforcing elements mounted according to a variant of the invention

  tion. In Figure 1, there is shown a mortise lock chest 1,

  was removed from the plaster and to which is attached a headrest 2.

  In the case of a multi-point lock comprising several cof-

  fres such as the trunk 1, the headrest 2 consists of a flat rod of length corresponding to the length necessary to receive the various chests of the

  lock and their actuation rods (not shown).

  In the boot 2 are mounted a deadbolt 3 actuated by a

  key canism (not shown) and a latch bolt 4 actuated by a follower 5 itself driven by a square rod carrying a handle or a button (not shown). The headrest 2 is fixed to legs 6 bent at right angles to the trunk 1 which includes pillars 7 provided with tapped holes for receiving fixing screws

from the plaster to the trunk 1.

  In order to ensure, in the region of the deadbolt 3, the strengthening of the resistance of the lock to forces transverse to the boot, elements of

  reinforcement constituted by two reinforcement plates 10 provided with steps

  respective wise men 11 for the deadbolt, aligned with passage 8 for this

  same deadbolt provided in the headrest 2, are arranged in the boot

  be the legs 6 folded at right angles thereto and fixed to said edges by the

  same screws 12 which secure the headrest 2 to the trunk 1.

  Referring more particularly to FIG. 2, it can be seen that the plates

  reinforcement ques 10 are of a width corresponding to the internal thickness

the trunk.

  These reinforcing plates each have tabs la-

  fixing bolts 14 engaged in respective housings 15,16

  lying in the bottom of the trunk 1 and in the plaster 17 which closes it.

  Thus, during assembly of the lock, it is possible to ensure the hand-

  your reinforcement plates 10 by clamping between the trunk 1 and the plaster panel 17 so that during the installation of the headrest 2 partially presented in phantom, the fixing holes made in the folded tabs 6 of the trunk 1,

  are aligned with the tapped holes 18 provided in the reinforcement plates

1 5 ment.

  In the present embodiment, the reinforcing plates 10 are arranged inside the trunk against the folded legs at right angles thereto. It is also possible to arrange these reinforcement plates at

  The exterior of the trunk as shown in Figure 3.

  We can see in this figure, the wall of the edge of a trunk 21 to which is attached a headrest 22 provided with a passage 23 for a deadbolt 24, reinforcement plates 25 being interposed between the edge of the trunk 21 and the headrest 22, and fixed to the outside of the trunk by screws 27 fixing the headrest to

this one.

  Although in the embodiments which have just been described, the reinforcement plates are provided only in the region of the deadbolt, it is also possible to provide such reinforcement plates over a greater length of the trunk, for example, on most or

  over its entire length covered by the headrest 2.

  Thanks to such an arrangement, tests have shown that the resistance

  a lockbox thus reinforced fully meets the requirements of the

my Europeans.

Claims (5)

  1. Lock, in particular a mortise lock, comprising at least one trunk (1; 21) to which a headrest (2; 22) is fixed, in which the passages for the bolts of the lock are provided, characterized in that at least in the passage area (8; 23) for the deadbolt (3; 24), at least one element of   reinforcement (10; 25) parallel to the headrest, is fixed to the trunk (1; 21) of the lock.   2. Lock according to claim 1, characterized in that said at least one reinforcing element (10) consists of at least one plate   fixed inside the lock box.   3. Lock according to claim 1, characterized in that said at least one reinforcing element (25) consists of at least one plate   fixed between the boot (21) and the headrest (22).   4. Lock according to claim 2, characterized in that said at least one reinforcing plate (10) has a width corresponding to   the inner thickness of the lock box (1) and is provided with lateral tabs   rales (14) engaged in lights (15,16) of corresponding shapes pre-   views in the facing walls of the trunk (1) and the plaster (17) of the lock,   said tongues (14) ensuring the retention of the reinforcement plate (10) at   inside the trunk for the installation of the headrest.   5. Lock according to any one of claims 2 to 4, character-   in that said reinforcing plates (10; 25) are fixed to the trunk   (1; 21) and to the headrest (2; 22) by screws (12; 27) fixing the headrest to the trunk.