ES2732951T3 - Auxiliary locking device for sliding or articulated doors and the like for applications in motor vehicles - Google Patents

Abstract

Device (100) for additional locking of the usual blocking element for motor vehicle doors, in particular sliding doors or articulated doors, comprising: - a lock (10) adapted to be fixed to a first leaf element (50) of said leaf door, said lock consisting of a housing (1) to accommodate a locking unit (2; 2 '; 2 ") that is operated with a key, said locking unit (2; 2'; 2") being accommodated in the housing (1) along a first axis (Z) orthogonal to a base (4) to fix the lock (10) to the first element (50) of the door leaf, said unit (2; 2 '; 2 "being able to ) of locking device operated to control a disk element (3; 3 ') to open / close the blocking device and being placed coaxially to said locking unit (2; 2', 2 ") to rotate between a position open and a closed position of the device and vice versa; - a locking element (20) of said disk element, configured to be fixed to a second leaf element (51) of said door, said blocking element (20) being configured to act mechanically together with the element (3; 3 ') of the disk of the lock (10) when the door is in a closed configuration, said locking element (20) comprising a coupling unit (21) shaped to delimit a seat (22) adapted to engage with said element ( 3; 3 ') of disk in closed position to avoid any relative movement between the lock (10) and the locking element (20) in the closed configuration of the door, in which said housing (1) comprises a hole (80 ) intern configured to accommodate said blocking unit (2, 2 ', 2 "), said through hole (80) delimited by a first wall (81) connected to an interior wall (82) of the housing (1) through of radial ribs (83), and wherein said first wall (81) of The hole (80) comprises channels (84) that are coaxial to the hole (80) to engage with longitudinal ribs (85) prepared on the outer surface (S, S ', S ") of an element (12-13; 113; 213) adapter unit (2, 2 ', 2 ") lock.

Description

DESCRIPTION

Auxiliary locking device for sliding or articulated doors and the like for applications in motor vehicles.

Background of the technique of the invention

Scope

The present invention relates to a device for locking articulated or sliding doors and the like, for applications in motor vehicles. In more detail, the invention relates to a cargo door locking device of a commercial motor vehicle that can be used to prevent unauthorized opening thereof, in addition to the usual lock.

Prior art

In the field of commercial motor vehicles, if they are sliding or articulated, the loading doors for access to the cargo receptacles of the motor vehicle comprise usual locks that in many cases are easily forced to open, therefore, not being suitable to prevent unauthorized access to cargo receptacles.

Today, various types of devices or locks to block the loading doors of commercial motor vehicles are very common. Such known locking devices can be purchased separately to be fixed to the loading doors of motor vehicles, in addition to usual locks.

A locking device for doors, for example, articulated or sliding doors, for commercial motor vehicles of known type normally consists of a lock comprising, within a housing, a corresponding mechanism that can be operated by a key that can be inserted into a key hole arranged on the lock. Such a mechanism comprises a traditional lock that allows the activation of a bolt.

A known lock of this type of the locking device is configured to act mechanically together with a bolt locking element, which is separated from the lock, to ensure the door is closed. In particular, both the lock and such a locking element of the bolt are each fixed on a respective leaf of the door by means of fixing means so that when the leaves are in the closed position, the bolt of the lock it can be inserted into a seat of the locking elements, for example, by operating the key. In this way, any relative movement between the lock and the bolt locking element is avoided, thereby ensuring that the door remains closed.

A known door locking device of this type using a bolt has the disadvantage of always requiring a key to control the insertion of the bolt into the seat of the locking element and to lock the door in the closed position.

Furthermore, since the mobile bolt is included in the lock of the locking device, known systems adapted to release the device from inside the motor vehicle in emergency conditions and to allow the opening of the door are usually associated with the lock due to which they are configured to act on the bolt to release it. This causes certain disadvantages to realize and implement such emergency door opening systems since the device lock is usually fixed on the door leaf that opens more often. In fact, the case may occur in which the emergency opening mechanism of the loading door of the motor vehicle, and particularly of the sliding type, may become trapped or otherwise interfere with the fixed part of the applied lock.

Document EP2995754 A1 discloses an auxiliary device for opening and closing the cargo compartment of a motor vehicle, which can be installed on the rear door of the vehicle. Document ES1076172 U discloses a lock for a delivery vehicle.

Summary of the invention

The object of the present invention is to propose a device for blocking articulated or sliding doors and the like, for applications in motor vehicles, in particular in commercial motor vehicles, which allows the above-mentioned disadvantages to be overcome with reference to the known technique. described.

A further task of the invention is to provide a locking device for the doors of a motor vehicle comprising gadgets that make it particularly suitable for resisting attempts at forced entry. A further task of the invention is to provide a locking device for the doors of a vehicle of engine configured to accommodate different types of locking cylinders to meet different usage needs, including at least one suitable for performing the "keep open" function.

Such objects and tasks are achieved by a locking device for motor vehicle doors, particularly for sliding doors or articulated doors, as defined by the attached claim 1.

Preferred embodiments of such a door lock device are defined by the dependent claims.

Brief description of the drawings

Additional features and advantages of the sliding or articulated door locking device according to the invention will become apparent from the following description of preferred embodiments thereof, given only by way of indicative non-limiting example, with reference to the accompanying drawings, in the what:

- Figure 1 shows an exploded and perspective view of the door locking device of the invention, comprising a first exemplary embodiment of a lock that is operated by a key; - Figure 2 shows a sectional view of the locking device in Figure 1, fixed to the door with a disk element for controlled opening / closing of the lock in the closed position;

- Figure 3 shows a sectional view of the locking device in Figure 1, fixed to the door with a disk element for controlled opening / closing of the lock in the open position;

- figure 4 shows a sectional view of the locking device in figure 1, fixed to the door with a disk element for controlled opening / closing of the lock in the closed position and with a hook of the locking element of the disk of opening / closing in emergency opening position;

- figure 5 shows a sectional top view, and with separate parts, of the locking device in figure 1, comprising a lock fixed to a first leaf element of the articulated door and a respective locking element fixed to a second door leaf element;

- Figure 6 shows an enlarged and exploded view of the locking element of the locking device of the invention;

- figure 7 shows a sectional view in assembled configuration of the locking element in figure 6; - Figure 8 shows an exploded and perspective view of a second exemplary embodiment of the key operated lock that can be used in the locking device of the invention; - Figure 9 shows an exploded and perspective view of a third exemplary embodiment of the key operated lock that can be used in the locking device of the invention;

- Figure 10 shows an enlarged bottom view of a housing to accommodate a locking unit of the locking device in Figure 1.

The same or similar elements are indicated with the same numbers in the figures mentioned above. Detailed description of preferred embodiments

With reference to Figures 1 to 7 mentioned above, a locking device for motor vehicle doors, in particular sliding doors or articulated doors, according to the invention is indicated as a set with the number 100.

The door locking device of the invention can be used in particular to lock the loading doors of a commercial motor vehicle under closed conditions, in addition to a usual lock, thereby preventing unauthorized opening of such loading doors and the access to the motor vehicle's cargo receptacle.

Later in the description, the locking device 100 for motor vehicle doors will also be indicated as a locking device or more simply as a device.

With reference to the drawings, the door locking device 100 comprises a lock 10 adapted to be fixed to a first door leaf element 50. A lock 10 of this type consists of a housing 1 to accommodate a locking unit 2 that can be operated by a key (not shown) that can Insert into a key hole 2a prepared in the housing 1.

A housing 1 of this type is in the form of a cap or hemispherical shape with a circular base part 1a. A housing 1 of this type is made of metallic material, preferably steel with thermal tempering processing to achieve a specific degree of hardness HRC 52-54. It should be noted that due to the cover shape of the housing 1 and the material used to make it, the locking device 100 of the invention guarantees increased resistance with respect to forced entry attempts both with sharp bodies and with cutting and drilling equipment .

With reference to FIGS. 2 to 3, the aforementioned blocking unit 2 of the blocking device 100 is accommodated in the housing 1 along a first Z axis (shown with a dotted line in the drawings) which is orthogonal to a base 4 for attaching the lock 10 to the first door leaf element 50. A locking unit 2 of this type that can be operated to control a disk element 3 to open / close the locking device 100 and is coaxially positioned to said locking unit 2 to rotate between an open position and a position device closed, and vice versa. In other words, the opening / closing disk element 3 functions as a rotary locking bolt of the locking device 100 of the invention. A disk element 3 of this type extends radially from the first Z axis and comprises a through hole 3a for the insertion of an actuating end 11 'of a cylinder unit 11 or first cylinder unit of the blocking unit 2.

In an exemplary embodiment, the disk element 3 comprises a first arc-shaped engagement surface 3b and a first 3c and a second protruding tooth 3d that function as end stop elements in the rotation of the disk element 3, such as It will be clarified below.

In a first embodiment, the above-mentioned blocking unit 2 comprises a first 12 and a second 13 container / adapter part of the cylinder unit 11 both having a substantially circular section. Such first 12 and second 13 container parts can be coupled to each other to accommodate the cylinder unit 11 itself, thereby forming a first adapter 12-13.

In addition, a toroidal shaped seal 14, for example, made of Teflon, is interposed between the second container part 13 of the cylinder unit and the disk element 3.

An additional seal 14 'is interposed between the cylinder unit 11 and the disk element 3.

In addition, the locking unit 2 comprises protection elements 15, 16, 17 of the cylinder unit 11 interposed between the key hole 2a and the first container part 12 of the cylinder unit. Such protection elements, of a type known to a person skilled in the art, are embodied in a protective element 15 and in dust covers 17 that can be operated by springs (not shown) to interact with a respective cover 16. As is known, the dust covers, which can be applied on certain types of locking cylinders, have the advantage of preventing foreign bodies (eg, dust, water, etc.) from entering the cylinder 11 once the key is It extracts from the lock, therefore, compromising its correct functioning.

Furthermore, with reference to FIG. 1, the fixing base 4 of the lock 10 includes a base sheet 6 fixed to a housing 1 by means of first screws 7, in particular four screws. A base sheet 6 of this type overlaps and is restricted to a recessed plate 5, which in turn can be fixed to the first leaf element 50 of the motor vehicle door by means of second screws 9. Respective third screws 8, in particular two screws, can be inserted in holes 5a, 6a through the recessed plate 5 and the base sheet 6, respectively, to ensure a solid fixation of the lock 10 to the motor vehicle door. The locking device 100 of the invention further comprises a locking element 20 of the disk element 3, configured to be fixed to a second leaf element 51 of the motor vehicle door.

A locking element 20 of this type is configured to act mechanically together with the disk element 3 of the lock 10 when the door is in a closed configuration, as shown in Figure 2. In a closed configuration of this type of the door, the blocking element 20 is inserted into a respective compartment 19 prepared in the hemispherical housing 1 of the lock 10.

In particular, the locking element 20 comprises a coupling unit 21 formed to delimit a seat 22 adapted to engage with the disk element 3 in a closed position to avoid any relative movement between the lock 10 and the locking element 20 in the configuration closed the door. In a preferred embodiment, the locking unit of the locking element 20 comprises a hook 21 that can rotate about a second Y-axis orthogonal to the first Z-axis of housing 1, from a rest position to a disengaged position. In such a disengaged position, shown in Figure 4, the hook 21 is disengaged from the disk element 3 by opening the locking device 100 in emergency condition

Advantageously, with reference to Figures 2 to 4, the locking element 20 comprises manually operated means 23 configured to operate the rotation of the hook 21 around the second Y axis, from the rest position to the disengaged position to release the device 100 Lock without using a key.

In greater detail, such means for operating the hook rotation 21 consist of a cable 24, for example, made of steel, which has a first end 24a fixed to a hook head part 25 21 and a second free end 24b which It can be operated manually from within the motor vehicle in the emergency condition.

Furthermore, with reference to Figure 6, the locking element 20 comprises elastic means 26, for example, one or more springs, associated with the hook 21. Such elastic means 26 are configured to rotate the hook 21 elastically from the disengaged position. until the rest position after the cessation of the action executed with the manually operated means. For example, the elastic means 26 mentioned above are embodied in a torsion spring or a compression spring.

In a preferred embodiment, the hook head part 25 of the locking element 20 comprises a deflected contact and a sliding surface 27 adapted to engage by the corresponding engagement surface 3b of the disk element 3 rotated in the closed position. In particular, the engagement of the first surface 3b of the disk element 3 on the deviated surface 27 of the hook 21 causes the rotation of the hook 21 itself from the rest position, opposing the action of the elastic means 26, in the direction contrary from the disk itself. Such a rotation is sufficient to engage the disk element 3 in the seat 22 of the hook 21 to lock the door in the closed position (Figure 2).

In order to release the device 100 and open the door from such a closed position of the door, there is a need to rotate the disk element, by means of a key, 90 °, from the closed position to the open position (figure 3) to bring the device 100 from the locked configuration to the released configuration.

Generally, the key can only be removed from the cylinder unit 11 in the locked position of the device 100.

In a preferred embodiment, with reference to Figures 1, 6 and 7, the rotatable hook 21 is fixed, for example, by means of a pin 35, to a semicircular plate 28 for fixing the locking element 20 to the second element 51 door leaf.

It should be noted that such a plate 28 comprises parallel ribs 37 for insertion of the hook pin 35 adapted to act together with a closure element 36 to delimit a rotation compartment 38 for the hook 21. It should be noted that the plate 28 and the closing element 36 can be fixed simultaneously to each other and to the second door leaf element 52 by means of bolts 39 (shown in Figure 1).

Advantageously, the fixing plate 28 includes first 29 and second 30 safety means adapted to prevent attempts at improper handling with the device and / or unauthorized opening.

In particular, the first safety means comprise ribs 29 arranged on a circumferential part of the fixing plate 28 for hook protection 21.

The second safety means comprise a tubular conduit 30 made of one piece with the fixing plate 28 and extending from said fixing plate in the opposite direction from the hook 21. Such a tubular conduit 30, which is in communication with the hook rotation compartment 38, is configured to promote the insertion and protection of the cable 24 released in an emergency device 100 (Figure 7).

Such safety means 29, 30 make it difficult to reach both the hook 21 and the safety cable 24 from the outside of the device 100 in order to operate the hook in an emergency and therefore hinder all attempts to open in a manner forced and release the device 100.

It should be noted that the housing 1 in the form of a device cover 100 is shaped to accommodate various types of cylinder units with related containers or adapters.

It should be noted that the locking unit 2 in Figure 1 comprises the first cylinder unit 11 that can be operated by a flat key (not shown).

Figure 8 shows an exploded and perspective view of a second exemplary embodiment of the lock unit 2 'operated by a key that can be used in the locking device 100 of the invention. A second locking unit 2 'of this type comprises a respective cylinder unit 111 or second cylinder unit that can be operated by a tubular key 112 to act on a control element 115 of the blocking unit 2'. A second cylinder unit 111 of this type can be inserted into a second container or adapter 113 to be accommodated in the housing 1.

In addition, a respective toroidal shaped seal 114, for example, made of Teflon, is interposed between the second container / adapter 113 of the second cylinder unit and the disk element 3 '.

A head gasket 114a is placed near an opening 113a to insert the second cylinder unit 111 into the second adapter 113.

The control element 115 comprises an actuator end 115 'which can be inserted into the through hole 3a of the disk element 3'. It should be noted that the disk element 3 'comprises the first engagement surface 3b similar to one of the disk 3 in Figure 1, since it has no protruding end stop teeth.

It should be noted that with the second cylinder unit 111 described above with a tubular key 112, the device 100 of the invention advantageously implements the "keep open" function known to one skilled in the art. With such a function, the key can be removed both in the closed lock position and in the open lock position in order to meet various usage needs. In other words, the disk element 3 'can be locked in the open position and the key 112 can be removed from the cylinder 111. Figure 9 shows an exploded and perspective view of a third exemplary embodiment of the locking unit 2 " which is operated with a key that can be used in the locking device 100 of the invention.

A third locking unit 2 "of this type comprises a third cylinder unit 211, in particular a double cylinder, which can be operated by a key (not shown). A double cylinder 211 of this type has an actuating end 211 'which can be inserted into the through hole 3a of the disk element 3.

A disk element 3 of this type is similar to that described with reference to Figure 1.

A double cylinder 211 of this type can be inserted into a respective container / adapter 213 or third adapter having a U-shaped cross section to accommodate in the housing 1.

In addition, a respective U-shaped seal 214, for example, made of Teflon, is interposed between the third container / adapter 213 of the cylinder and the disk element 3.

Additionally, a unit 215 for protecting the double cylinder 211 comprises a protector 215a fixed to a cover 215b between a membrane 215c, for example, a silicone resin membrane, and a respective head gasket 214a are interposed.

With reference to Figure 10, an inner structure of the cover-shaped housing 1 configured to accommodate the various locking units 2, 2 ', 2 "mentioned above is described in greater detail. In particular, the housing 1 comprises a through hole 80 in communication with the key hole 2a and configured to accommodate the three types of locking units 2, 2 ', 2 ", which is the first cylinder unit 11, second 111 and third 211 inserted in the container / adapter first 12-13, in the second 113 and in the third 213, respectively.

In greater detail, the hole 80 is delimited by a first wall 81 connected to an inner wall 82 of the housing 1 through radial ribs 83. The first wall 81 mentioned above of the hole 80 comprises channels 84, in particular four channels, which are coaxial to the hole 80 mentioned above. Such channels 84 are configured to engage longitudinal ribs 85 prepared on an outer surface S, S ', S' 'of the first 12-13, second113 and third 213 adapter, respectively.

In particular, such longitudinal ribs 85 allow the first adapter 12-13 of the first cylinder 11 (shown in Figure 1) to be inserted and held in the hole 80.

In addition, the through hole 80 comprises a first 86 and a second compartment that extend radially from the aforementioned hole 80 along the same main or first direction and in the opposite direction.

In greater detail, the aforementioned second adapter element 113 of the second cylinder unit 111 comprises a projecting part 88, with a rectangular cross-section, prepared on the surface S 'outside of a second adapter element of this type and configured to be accommodated in the first compartment 86.

In other words, providing a first compartment 86 of this type advantageously allows the second adapter element 113 of the second cylinder 111 to be inserted and held in position in the hole 80 of the housing 1.

In addition, the third locking cylinder 211 of the blocking unit 2 "described above housed in the third adapter element 213 comprises a first protruding part 89 configured to be accommodated in the second compartment 87. In other words, providing a second compartment 87 of this type advantageously allows the third cylinder 211, with the related adapter 213, to be inserted and held in the hole 80 of the housing 1.

In addition, one of the aforementioned radial ribs 83 of the housing 1 comprises an elevated element 90 configured to abut the tooth 3c and 3d protrusion of the disk element 3 to act as an end stop for the rotation of a disk element of this type.

It should be noted that all the components of the blocking element 20 of the blocking device 100 and all the fixing means used in the device are made of metallic material, preferably stainless steel, to guarantee an increased resistance to oxidation.

Preferably, the protector 15, 215a of the cylinder unit 11, 211 has the same characteristics as the cover-shaped housing 1 in terms of materials used for manufacturing it.

As noted above, the locking device 100 for motor vehicle doors of the invention has several advantages over known solutions and perfectly achieves established objects.

In particular, with the locking device 100, there is no need to use the key to lock the door in the closed position. In fact, following the movement of the first leaf element 50 to bring the door of the motor vehicle to the closed position, due to the shape of the head part 25 of the hook 21 that can rotate, the disk element 3, which already it is in the closed position, engages the contact and the sliding surface 27 of such a head part 25, thereby producing the rotation of hook 21 in the opposite direction of the disk itself. Such a rotation is sufficient to engage the disc in the seat 22 of the hook to lock the door in the closed position. In addition, with the device of the invention, there is no need to use a mechanism with a "quick release" movement.

In addition, various known solutions, the locking device 100 for motor vehicle doors of the invention does not have the disadvantages for making and implementing emergency door opening systems since such systems in the device 100 are associated with the element 20 lock and not with lock 10.

In addition, as described above, the door locking device 100 of a motor vehicle comprises safety means associated with the locking element 20 that prevents the device from opening with skill, for example, by introducing foreign bodies to produce a rotation of the hook 21. Such safety means, therefore, make the door locking device 100 of the invention suitable for resisting attempts at forced entry and improper handling.

In addition, the device 100 is configured to accommodate different types of locking cylinders to meet different usage needs, including one suitable for performing the "keep open" function.

Those skilled in the art can make various changes and adaptations to the embodiments of the locking device for motor vehicle doors of the invention, and can replace elements with others that are functionally equivalent in order to meet contingent needs, without departing from the scope. of the invention as defined by the appended claims.

Claims (13)

1. Device (100) for additional locking to the usual locking element for motor vehicle doors, in particular sliding doors or articulated doors, comprising: - a lock (10) adapted to be fixed to a first leaf element (50) of said door, said lock consisting of a housing (1) to accommodate a blocking unit (2; 2 '; 2 ") that is operated with key, said locking unit (2; 2 '; 2 ") being accommodated in the housing (1) along a first axis (Z) orthogonal to a base (4) to fix the lock (10) to the first element (50) of door leaf, said locking unit (2; 2; 2 ") being able to be operated to control a disk element (3; 3 ') to open / close the locking device and being coaxially positioned to said locking unit (2; 2, 2 ") to rotate between an open position and a closed position of the device and vice versa; - a locking element (20) of said disk element, configured to be fixed to a second leaf element (51) of said door, said blocking element (20) being configured to act mechanically together with the element (3; 3 ') of the disk of the lock (10) when the door is in a closed configuration, said locking element (20) comprising a coupling unit (21) shaped to delimit a seat (22) adapted to engage with said element ( 3; 3 ') disk in closed position to avoid any relative movement between the lock (10) and the locking element (20) in the closed door configuration, wherein said housing (1) comprises a through hole (80) configured to accommodate said blocking unit (2, 2 ', 2 "), said through hole (80) delimited by a first wall (81) connected to a inner wall (82) of the housing (1) through radial ribs (83), and wherein said first wall (81) of the hole (80) comprises channels (84) that are coaxial to the hole (80) to engage with longitudinal ribs (85) prepared on the outer surface (S, S ', S ") of an element (12-13; 113; 213) adapter of the blocking unit (2, 2', 2"). 2. Locking device (100) for motor vehicle doors according to claim 1, wherein said locking unit of the locking element (20) comprises a hook (21) that can rotate about a second axis (Y) orthogonal to the first axis (Z) of the housing (1) from a resting position to a disengaged position to disengage the disk element (3; 3 ') by opening the locking device in an emergency condition. 3. Locking device (100) for motor vehicle doors according to claim 2, wherein said locking element (20) comprises manually operated means (23) configured to operate the rotation of the hook (21) from the position rest to the disengaged position to release the locking device without using a key. 4. Locking device (100) for motor vehicle doors according to the preceding claim, wherein said means for operating the rotation of the hook (21) consist of a cable (24) having a fixed first end (24a) to a head part (25) of the hook head (21) and a second free end (24b) that can be operated manually from within the motor vehicle. 5. Locking device (100) for motor vehicle doors according to claim 3, wherein said locking element (20) comprises elastic means (26) associated with said hook (21), said elastic means being configured to make rotate the hook (21) elastically from the disengaged position to the rest position following the cessation of the action performed with said manually operated means. 6. Locking device (100) for motor vehicle doors according to claims 4 and 5, wherein the head part (25) of the hook (21) of the locking element (20) comprises a contact and a surface ( 27) slider adapted to engage a corresponding surface (3b) of the disk element (3; 3 ') rotated in a closed position to produce rotation of the hook (21) from the rest position opposing the action of the means ( 26) elastic mentioned above. 7. Locking device (100) for motor vehicle doors according to claim 4, wherein said rotatable hook is fixed to a semicircular plate (28) for fixing the blocking element (20) to the second element (51 ) of door leaf, said fixing plate (28) including first (29) and second (30) security means adapted to prevent attempts of improper handling of the device. 8. Locking device (100) for motor vehicle doors according to claim 7, wherein said first safety means comprise ribs (29) arranged on a circumferential part of the fixing plate (28) for hook protection (twenty-one). 9. Locking device (100) for motor vehicle doors according to claim 7, wherein said second safety means comprise a tubular conduit (30) made of a piece with the fixing plate (28) and extending from said fixing plate in the opposite direction from said hook (21), said conduit being configured to promote the insertion and protection of the release cable (24) in an emergency of the device. 10. Locking device (100) for motor vehicle doors according to any one of the preceding claims, wherein said housing (1) is in the form of a cap or hemispherical shape and is made of steel. 11. Locking device (100) for doors of motor vehicles according to claim 1, wherein said through hole (80) comprises a first (86) and a second (87) compartment extending radially from the hole (80 ) mentioned above along a first direction and in the opposite direction. 12. Locking device (100) for motor vehicle doors according to claim 11, wherein said adapter element (113) of the locking unit (2 ') comprises a protruding part (88) prepared on the surface ( S ) exterior configured to stay in said first compartment (86). 13. Locking device (100) for motor vehicle doors according to claim 11, wherein said locking unit (2 ") comprises a locking cylinder (211) housed in said adapter element (213) and having a outgoing first part (89) configured to stay in said second compartment (87).