EA015020B1 - Security lock hook-shape latch reinforcement pins - Google Patents

Abstract

The present invention proposes a security lock comprising a regular sliding bolt along with a set of separate hook-shaped latches in the form of curvilinear projections operating jointly in the manner to interlock with suitable latch slots on the doorframe. According to the present invention, said curvilinear latches are additionally provided with a plurality of pins vertically projecting from the lateral surface thereof in the manner to face either of the case side sheets. In case of an unauthorized attempt to release the lock by bending the lock panel on the door frame outwardly so as to cause the latches to move in the direction of the frame, the vertically projecting pins within the inside of the case will abut against the lock panel on the lock side and prevent movement of said latches.

Description

The present invention relates to a locking device, namely to a door locking device with hook-shaped latches, having improved safety characteristics.

Prior art

Locking devices that offer high safety performance, i.e., hook-shaped locking devices that engage in slots in the door frame, are well known among locking device manufacturers. They have a particular advantage in that with full locking they provide for many axes that perform locking in order to withstand both vertical and horizontal forces that are applied in connection with hacking attempts and during these attempts.

In this regard, there are many references to the patent literature, and they all relate to hook-shaped latches that are turned by a set of axes, driven by a drive mechanism. One of these patent documents, accessible to a wide range of people, is Italian patent ΙΤΤ020000226, which was issued in the name of Tsmo δ.τ.Ι. He reveals hook-shaped latches in the form of curvilinear projections blocked with locking slots in the locking panel. These curvilinear latches are rotated by means of axes attached to them. The rotation of the axes by the drive mechanism is carried out by a movable element that controls the lever, which includes the corresponding hinges, which rotate the indicated axes, and, consequently, the specified curvilinear latches.

The solution according to this document differs from the state of the art in that it is a special design designed to prevent burglary attempts, specifically designed to make hook-shaped latches unusable by damaging their rotation mechanisms. Although locking devices with these types of latches have a significant advantage over conventional locking devices equipped with rectilinear latches, they still have some weak points.

It is well known that various techniques are used to open the door locking device during burglary attempts. One of these techniques is to use an endless screw, or a worm, such as a jack screw, that is, a screw that is fixed so that when it rotates, it cannot move in the longitudinal direction. Accordingly, being fixed on two sides of the door frame in a position parallel to the door surface, it remains stationary and causes the door frame to bend toward the empty spaces beyond the door. In the end, it can bend the box to such an extent that the hook-shaped latches reach their ultimate resistance, and therefore either the ends of the hooks (hooks) break along the line defining the head of the hook, or the pivot pins on which the specified curvilinear latches are pivotally mounted and by means of this, they are also attached to the side sheet of the case of the locking device and the latch drive pins guided (driven) by the latches, tend to move forward in the direction of the box by breaking said bo ovogo sheet housing of the locking device on the distance to the panel on the side of the locking device. In the latter case, there is a possibility that the indicated axes of rotation and guided drive pins will break.

On the other hand, in both cases, all aspects of security of the door will be virtually inoperative, because, respectively, either without a hook hook, the latches will no longer engage in the slots on the side panel of the box, or they will not be fixed either by the axes of rotation, nor by guided drive pins.

The side walls of the body of the locking device and several individual components of the lock metal products are usually attached to each other inside the body at several points. The pins on the axes of rotation of the hook-shaped latches are also attached to the side wall of the sheet material. As explained earlier, this becomes a serious disadvantage, especially in the case of a hacking attempt. The linear stress created by the endless screw along the transverse axis of the door in the direction of the door frame, in particular, requires hook-shaped latches in order to counteract the outward force that occurs at the ends of the hook.

When breaking occurs, the ends of the hooks are in a position interlocked with slots in the side panel of the box. This panel is made of durable material and in most cases will not break. However, as the endless screw rotates, it will tend to bend outward, and the slits in the panel along with the hook ends locked to it will deform to such an extent that there will be a gap between the side of the locking device and the side panels of the box.

Destruction of hook shaped latches can be prevented and eliminated by appropriate material selection. On the other hand, assuming that the outer portions of the hook of the latches, due to the choice of material, will be able to withstand the rupture, it can be said that the tearing force in such a case will act on the axes and on the guided driving hook locks. After breaking the pivots, the main function of which is not to preserve the integrity of the system and counteract external forces, but to form their center of rotation, the hook-shaped latches will first lose contact with the side sheet of the housing, and due to some damage

- 1 015020 on the guided drive pins, the latches will practically be released and will no longer be attached to the body of the locking device.

From the following description, it will be understood that the present invention solves a particular problem identified above by using a locking device panel that is made of durable material and is suitable for counteracting forces that may cause the latches to move beyond their predetermined, most remote limit positions.

Summary of Invention

The main objective of the invention is to create a highly reliable door locking device with hook-shaped latches, the movement of which to the outside is limited to a predetermined range, and which cannot be removed from the case of the locking device.

The present invention proposes a secret locking device comprising a standard sliding bolt along with a set of separate hook-shaped latches in the form of curvilinear protrusions, working together in such a way as to be locked with corresponding locking slots in the door frame. In accordance with the present invention, said curved latches are additionally provided with pins protruding vertically from the side surface of the latches so that they are facing any of the side sheets of the closure housing. In the case of an unauthorized attempt to open the locking device by bending the locking device panel on the door frame outward so as to make the latches move in the direction of the box, the vertically protruding pins within the inner part of the body will rest against the panel on the locking side and prevent these latches from moving.

List of drawings

The accompanying drawings represent an example of a locking device assembly, the advantages of which over the achieved level of technology have been outlined above and will be explained in detail later.

FIG. 1a shows a lateral perspective side view of a closure device body according to the present invention;

FIG. 1b shows a lateral perspective view of a side panel of a door frame according to the present invention;

FIG. 2 shows a longitudinal perspective side view of the closure body of the present invention;

FIG. 3 shows another lateral perspective view of the closure device body according to the present invention;

FIG. 4 shows hook locks according to the present invention;

FIG. 5 shows a side sheet of a closure body according to the present invention.

Information confirming the possibility of carrying out the invention

The closure assembly of FIG. 1a, generally designated 11, includes latches 12, 13 and 14, which can be moved relative to said node 11 so as to engage in the corresponding slots 15, 16 made in the closure panel 18; a drive mechanism for translating latches between locked and unlocked positions; and last in order, but not least in importance, a transmission mechanism that transmits motion to the latches 13, 14.

In accordance with the present invention, in addition to the latch 12 in the form of a conventional sliding bolt, a set of separate hook latches 13, 14 are provided in the form of curvilinear projections interacting jointly for locking with a corresponding locking slot 19, which is made in the side panel 20 of the box. These curved latches 13, 14 are designed to work together and rotate by means of axles 21 attached to them. The hook shaped latches 13, 14 are usually designed so that they have a curvilinear side on the outer portion of the latch head, this side extending inside right angle and forms there the space between the two blocks. One of these blocks is actually part of the head, which engages in the slot 19, made in the panel 20.

A linearly sliding bolt 12, corresponding to the present invention, is usually controlled by a handle sleeve in the form of a spring-loaded handle-driven design, which rotates a mechanism that transmits movement to a spring-loaded structure. The drive mechanism of the straight bolt 12 and its gear mechanism are widely used in the art and do not need additional references here. The behavior of the bolt 12 in relation to the sleeve of the handle for a person skilled in the art obvious.

As for the curved latches 13, 14, the axes 21 are rotated to move them by a drive mechanism triggered by inserting a key into the keyhole 22 to move a rotatable member (not shown) that controls the lever to engage in the groove 22 to advance the specified drive mechanism for curvilinear latches 13, 14. The function of the locking cylinder for a person skilled in the art is obvious. Actuators for latches 13, 14 usually consist of linearly guided, sliding in one

- 2 015020 in the direction of the plate 25 with two gripping levers 29, passing to the center or axis of rotation 21 of the latches 13, 14.

In accordance with the present invention, the curved bolts 13, 14 are designed to provide a one-turn offset of 90 °, ensuring the position of the engagement in the slot 19 of the panel in one turn. Turning a suitable key in the keyhole 22 causes the axles 21 and a pair of redirection pins 23, which are guided within the latches 13, 14, to rotate the indicated latches 13, 14 accordingly. Each of these pins 23 moves back and forth between the two edges of the guide channel 24, FIG. 2, depending on the engaging and disengaging positions of said latches 13, 14. Synchronous movement of said redirecting pin 23 together with axis 21 leads to full-step 90-degree mutual sliding of curvilinear latches 13, 14.

The synchronous movement of the axes 21 together with the redirection pins 23 can be explained by referring to the design of each gripping lever 29 extending from a straight-guided plate 25 sliding in one direction. To this end, each gripping lever 29 passing to each latch 13, 14, contains a recess with an open end for lateral reception of these axes 21, the lower surfaces of which are attached to the corresponding slot, on at least one of the side walls 28 of the body of the locking device Iran axis 21 circumferentially completely covered, except for the open end of recess, whose movement is preferably limited.

Next to these recesses on each lever is a slot for vertical reception of the redirecting pin 23, which is allowed only limited linear movement within the guide channel 24. The latter moves to move the latch 13, 14 directly by the gripping lever 29, since it is placed as in the gripping slot lever 29, and into the channel 24 latch (coaxially). At the very beginning of the locking sequence, each gripping arm 29 is mutually advancing so as to cause the indicated redirecting pins 23 to slide into the channel 24, and further advancement of the gripping levers 29 causes the redirecting pins 23 to translate the latches 13, 14 around each center or axis of rotation 21 to fully locked position. Single-turn 90-degree movement of the latches 13, 14 is impossible without proper advancement of the redirection pins 23 to the most distant limit position in the guide channels 24. In other words, rotation is performed by using an oblique movement of the redirecting pins 23 within the channels 24 tilted relative to the direction of the locking panel 18 . Due to the location of the center or axis of rotation 21 in the direction of the inclined channels (24), effective single-turn 90 degrees slip is provided. An effective single-stage full revolution would not be possible in an alternative design in which the centers or axes of rotation 21 are not located directly in the longitudinal direction of the channels 24.

In order to prevent hacking attempts of the type previously described, in which an endless screw is used to bend the panel 20 in the direction of the door frame in order to create stress on the most critical protection components of the locking device, such as redirect pins 23 and axis 21, the present invention has a special place a set of special tools to keep the redirection pins 23 and axles 21 away from the components that are under the influence of force. Accordingly, the curvilinear latches 13, 14 are additionally provided with pins 26 protruding vertically from the side surfaces of the portions of the bodies of the latches, which remain within the closure body in the locking position. In the event of an unauthorized attempt to open the locking device by bending the panel 20 on the door frame to the outside so as to force the latches 13, 14 to move in the direction of the box, the vertically protruding pins within the inside of the case will abut against the panel 20 and stop the displacement of the latches 13, 14.

The reinforcement pins 26 are the first barriers that come into contact with the panel 20 during any attempt to shift said latches outwards, i.e. in the direction of the door frame. Being longitudinally inserted into the body of the latches 13, 14 in a safe manner, so that their upper parts somewhat extend beyond the surfaces of the latches 13, 14, the reinforcing pins form a sufficient contact surface with a portion of the panel 20 located outside the locking slot 19, which allows the latter to stop all the body of the latch 13, 14, moving and opposing the outward forces that would otherwise act on the re-guiding pins 23 and the axis 21.

If we consider the locking position of the latches 13, 14, then we can say that the reinforcement pins 26 are located essentially next to the panel 20. In other words, the distance of the reinforcing pins 26 to the panel 20 is less than the radius of the amplifying pin itself 26. More precisely, the small distance between the point of the amplification pins 26 and the panel 20 is smaller than the radius of the amplification pin 26 itself.

In accordance with the present invention, the reinforcement pins 26 can also be mounted on the far end of the latch 13, 14 relative to the panel 20. Such a pin 27 is shown in FIG. 4. The pins 27 symmetrically protruding from both surfaces of the curved latch 13, 14 will additionally

- 3 015020 delay the removal of the latch 13, 14. In the applicant's country it is known that the risk of breaking with the full opening of the high-security locking device decreases sharply, and the time required for being in front of a single locking device increases.

Summarizing all the above, it should be noted that the present invention proposes a locking device assembly 11, comprising standard and curved latches 12, 13 and 14, which can be moved relative to the assembly 11 so as to engage in the corresponding slots 15, 16, made in panel 18 the locking device, the drive mechanism for activating the standard and curved latches 12, 13 and 14 and the transmission mechanisms transmitting the movement to the latches 13, 14, moreover, said curved latches 13, 14 are equipped with at least one m amplifying pin 26 projecting from the side surfaces of the body portions 13 of the latch 14, which remain within the housing of the locking device in the locking position

Claims (2)

CLAIM 1. The node (11) of the locking device containing rectilinear and curved latches (12, 13, 14), which can be moved relative to the specified node (11) to engage in the corresponding slots (15, 16) made in the panel (18) locking device; drive mechanisms for activating rectilinear and curved latches (12, 13, 14) and transmission mechanisms that transmit movement to these latches (12, 13, 14), characterized in that the curved latches (13, 14) are equipped with at least one reinforcing pin (26) protruding from the side surfaces of the body sections of the curved latch (13, 14) remaining within the locking device within the locking position, the reinforcing pins (26) protruding laterally from the side surfaces of the curved latch (13, 14) for the formation, in any attempt to shift the latches (13, 14) outward, of the lateral contact surface with portions of the panel (18) of the locking device located directly above and below the locking slot (15), while in the locking position of the latches (13, 14) reinforcing pins (26) are located in close proximity to the panel (18) of the locking device. 2. The node according to claim 1, characterized in that the smallest distance between any point of the reinforcing pins (26) and the panel (18) of the locking device is less than the radius of the reinforcing pin (26).