Interlocking device for the landing door of a lift installation

Abstract

The invention relates to an interlocking device (1) for a landing door of a lift, comprising a base plate (4), a pivoting plate (2) with at least one drive wheel (21, 22) and an interlocking lever (3). The pivoting plate and the interlocking lever comprise adjustment and fixing means (5) by means of which they can be moved relative to each other along a direction of adjustment. The adjustment and fixing means are made up of at least one oblong adjustment slot (51), at least one adjustment screw (52) capable of occupying any position along the slot, and at least one fixing nut (53). The interlocking device further comprises a brake device (6) by means of which the pivoting plate moves with a certain resistance relative to the interlocking lever.

Description

[0001]

[0002] “Interlocking device for the landing door of an elevator installation”

[0003] Technical field of the invention

[0004] The invention relates to an interlocking device for the landing door of an elevator installation.

[0005] Background of the invention

[0006] It is well known that every elevator installation has an elevator car door, whether it has one or more leaves, and several landing doors, also called shaft or elevator car doors, located at the corresponding stopping points or landings of the floors between which the elevator car moves.

[0007] Elevator doors are typically operated by a car operator with a mechanism that opens and closes the car door. Landing doors, on the other hand, generally do not have their own operator or drive mechanism. Instead, they are pulled from the car door by a drive mechanism, often consisting of a carriage or track that moves in the direction of opening and closing, equipped with small levers. These drive mechanisms are also responsible for unlocking the landing doors.

[0008] Generally, landing doors have an unlocking device provided with landing door rollers or wheels, these wheels being separated by a certain distance horizontally and vertically when the locking device is in an operational locking position.

[0009] The drive mechanism on the elevator car door, according to some designs, comprises two drive pins oriented perpendicularly, with a variable distance between them. The landing doors are unlocked because the drive pins exert a force on the landing door's drive wheels. This force causes the drive wheels to move closer together or further apart. The two drive wheels are mounted on a pivoting support plate that swings between a locked and unlocked position, depending on the pressure exerted by the drive pins on the wheels. When maximum pressure is applied, the horizontal distance between the two wheels increases and the vertical distance between them decreases, and the pivoting plate rotates around a point on its surface.The tilting plate is bolted to a locking lever, which supports a male locking element at one end. In the locked operating position, this male element is connected to a female locking element fixed to the landing door frame or housing. When the tilting plate rotates due to pressure exerted on the wheels, the male locking element rotates with it, separating and disengaging from the female locking element. This disengagement unlocks the landing door, allowing it to be pulled open or closed by the sliding rollers.

[0010] Other alternative embodiments contemplate that the drag device comprises, instead of two blades, one blade, three blades or a U-shaped wedge, and that instead of two drag rollers or wheels, there is a single wheel that, instead of moving away from the blades or the wedge, moves closer.

[0011] In a landing interlock device, in addition to fulfilling the interlocking functions themselves, the position of the drive wheels is very important, as they cause the interlock, and consequently the landing door, to open and close when they are broken by the cockpit operators' blades.

[0012] This position must be horizontally aligned (understanding horizontal as a direction parallel to the width of the door) at a certain distance from the operator's skid blades in order to function correctly, in addition to being at a correct depth (measured in the direction perpendicular to the width of the door) so that it overlaps sufficiently, but maintaining a safe distance from the cabin elements.

[0013] In known locking devices, horizontal alignment is regulated and fixed by means of adjustment and locking mechanisms. The pivot plate on which the drive wheels are mounted is, in principle, sliding or displacing relative to the locking lever, which it partially overlaps. This is because the locking lever comprises two screw shafts extending perpendicular to the pivot plate and each passing through a corresponding oblong groove provided in the pivot plate. Each screw shaft has a locking nut at its end, but when the nuts are not yet tightened, the grooves can be moved left and right relative to the screws. This allows the pivot plate to be manually moved relative to the locking lever until the position is reached where the drive wheel or wheels are centered with respect to the blades.To fix the position of the wheels in the center position on each landing, you have to tighten the fixing nut located at each of the ends that protrude through the groove and press them against the groove of the tilting plate.

[0014] The reality is that, since each landing has its own adjustments—some are more to one side than others—the adjustment technicians have to ride on top of the elevator car, landing by landing, stopping to check if the wheels are centered with respect to the pivot points when moving between floors without touching the wheels, and also if they are centered when the landing door needs to be opened, that is, when the pivot points press against the wheels to disengage. The adjustment technicians have to measure, loosen the nuts on the bolts to move them, get out of the car again, tighten the nuts, and so on.Thus, in practice, in an elevator installation, the entire operation of adjusting the position of the drive wheels so that they are centered involves several ups and downs for adjustment on the same landing, which is a costly task in terms of both time and labor when the same thing has to be repeated for each of the landings that the elevator passes through.

[0015] It is therefore an objective of the present invention to provide a locking device that allows the regulation and adjustment of the tilting plate with respect to the locking lever in the horizontal direction to fix the position of the drive wheels to a centered position with respect to the blades in a faster and simpler way.

[0016] Explanation of the invention

[0017] In order to provide a solution in accordance with the stated objective, an interlocking device for a landing door of an elevator installation is disclosed, comprising:

[0018] - a base plate provided with a tilting axis perpendicular to the surface of the base plate;

[0019] - a tilting plate consisting mostly of a front surface defining a vertical plane in which the plate is tiltable with respect to the base plate around the tilting axis, in which at least one drive wheel is arranged with a respective axis of rotation perpendicular to the front surface, and

[0020] - a locking lever, tiltable with respect to the base plate around the tilting axis, disposed between the base plate and the tilting plate, consisting mostly of a main surface parallel to the front surface of the tilting plate, the tilting plate being superimposed on a part of the locking lever, exposing at least one switch contact provided at one of the lateral ends of the locking lever.

[0021] In essence, the locking device of the invention is characterized in that the tilting plate and the locking lever comprise adjusting and locking means by which the tilting plate and the locking lever are displaceable relative to each other along an adjusting direction that lies in a plane perpendicular to the tilting axis, and the displacement distance can be adjusted and fixed along said direction. The adjusting and locking means consist of at least one oblong adjusting slot parallel to the adjusting direction, at least one adjusting screw arranged through the adjusting slot and capable of occupying any position along the adjusting slot, and at least one locking nut by which the adjusting screw can be fixed in a position along the adjusting slot by tightening the nut.At least one adjustment slot is provided on the rocker plate or the locking lever.

[0022] The invention is also essentially characterized in that the locking device comprises a brake device by which the rocker plate moves relative to the locking lever with some resistance. The brake device consists of an oblong brake groove parallel to the direction of adjustment and a brake insert with some elasticity, inserted with contact between the two sides of the brake groove parallel to the direction of adjustment. The brake groove is displaceable relative to the brake insert with some friction between the brake insert and the two sides of the brake groove between which it is inserted.The brake slot is arranged on the rocker plate and the brake insert on the locking lever, or vice versa, i.e., the brake slot on the locking lever and the brake insert on the rocker lever, although for ease of assembly the first option is preferred.

[0023] Normally, the tilting plate has at least two drive wheels, although some mechanisms have only one or three. In any case, if there is at least one drive wheel, that wheel is the one that must be contacted with a certain pressure by at least one bolt to generate the tilting of the tilting plate and, consequently, the tilting of the locking lever to release it and open the landing door.

[0024] Thanks to the braking device of the interlocking device of the invention, in combination with the regulating and fixing means, the operators adjusting the position of the wheel or the drag wheels can center them on each landing with respect to the cabin door pins in a quick and easy manner.

[0025] The braking device allows the rocker plate, when the adjusting and locking mechanisms are not yet fixed in a position (i.e., before the adjusting screw nut has been tightened to lock it in place within the adjustment slot), to move left and right relative to the locking lever, albeit with some friction or resistance. In other words, the rocker plate can move relative to the locking lever, but the braking device slows it down during this movement.

[0026] To center the drive wheels with respect to the guide rails, first, leave the adjustment and locking mechanisms in their adjusted position, without tightening the adjustment screw(s) (if there is more than one), and move the elevator to a floor or landing. Then, allow the landing door to open naturally by making contact and pressing the guide rails against the drive wheels. As the guide rails move against the drive wheels, the drive wheels will move to a position where they are centered with respect to the guide rails, because at least one adjustment screw (or screws, if there is more than one) is not yet tightened.Thus, the tilting plate will move to one side or the other as the drive wheels are pushed by the blades, but this movement of the tilting plate will not be completely free, but will be slowed down or there will be some resistance to the movement of the tilting plate, due to the braking device, so that when the blades have left the landing, the tilting plate will remain in the position in which they left it, and the adjusting operators will only have to go and then tighten the adjustment screw (or screws, if there is more than one), because that will be the position in which the drive wheels will have been centered with the blades, that is, the position in which the opening of the landing door will be coordinated with the opening of the car door.

[0027] According to another feature of the device that is the subject of the invention according to a preferred embodiment, the brake groove is provided in the rocker plate and the brake insert in the locking lever.

[0028] According to a preferred embodiment, the brake insert is configured by a plastic strip.

[0029] Preferably, the plastic strap is also secured to the locking lever by two tabs through which it is pressed into a through-hole in the locking lever. The brake insert also contributes to a more secure connection between the locking lever and the rocker plate.

[0030] According to another feature of an embodiment of the device that is the subject of the invention, the regulating and fixing means formed by the at least one oblong regulating slot, the at least one regulating screw and the at least one tightening nut (53), are arranged on the front surface of the tilting plate and on the main surface of the locking lever.

[0031] Preferably, in this embodiment the regulating and fixing means comprise at least two oblong, spaced-apart regulating slots, each extending in a direction parallel to the regulating direction, at least two regulating screws, each arranged through a respective regulating slot and capable of occupying any position along the respective regulating slot, and at least two respective fixing nuts, one for each regulating screw, with which each regulating screw can be fixed by tightening its respective nut in a position along the respective regulating slot in which it is arranged through it.

[0032] According to this embodiment, the adjustment slot or slots are arranged on the front surface of the rocker plate and the stem of the adjustment screw or the stems of the adjustment screws of the adjusting and fixing means (5) are fixedly attached to the main surface (30) of the locking lever.

[0033] According to a second embodiment of the invention, in addition to the front surface, the tilting plate is formed by a locking tab configured on an upper edge of the tilting plate as a fold perpendicular to the front surface. The locking lever, in addition to the main surface, is formed by a wing parallel to the locking tab. The adjustment and locking means are arranged on the locking tab of the tilting plate and on the wing of the locking lever.

[0034] In this second embodiment, preferably the at least one adjustment slot is arranged in the wing of the locking lever and the stem of the at least one adjustment screw is arranged through a respective fixing hole provided in the fixing tab of the rocker plate and through the adjustment slot.

[0035] According to an optional feature of this second embodiment of the invention, the regulating and fixing means comprise at least two oblong, spaced-apart regulating slots, each extending in a direction parallel to the regulating direction, at least two regulating screws with each of their stems arranged through a respective fixing hole provided in the fixing flange and also arranged through a respective regulating slot, capable of occupying any position along the respective regulating slot, and at least two respective fixing nuts, one for each regulating screw, with which each regulating screw can be fixed by tightening its respective nut in a position along the respective regulating slot in which it is arranged.

[0036] Another feature of the invention is that the length of the oblong brake groove measured in the regulating direction is equal to or greater than the length of the at least one oblong regulating groove measured in the regulating direction.

[0037] Brief description of the drawings

[0038] The accompanying drawings illustrate, by way of non-limiting example, a preferred embodiment of the interlocking device of the invention and a second embodiment. In said drawings:

[0039] Fig. 1 is a front view of a preferred embodiment of the locking device of the invention in an unlocked position with the pivot plate centered with respect to the position of the locking lever;

[0040] Fig. 2 is a front view of the locking device of Fig. 1 but in an unlocked position with the tilting plate off-center, displaced to the right with respect to the locking lever;

[0041] Fig. 3 is a perspective view of the base plate and locking lever of the locking device of Fig. 1;

[0042] Fig. 4 is a detailed view of the brake insert of the locking lever of the locking device of Fig. 1;

[0043] Fig. 5 is a rear view of the brake insert of Fig. 4, showing through the tabs by which it is press-fitted into a through-hole made in the locking lever;

[0044] Fig. 6 is a detailed view of the interlocking device brake mechanism of Fig. 1, consisting of an oblong brake groove and a brake insert inserted therein;

[0045] Fig. 7 is a front view of the locking device of Fig. 1 in a locked position with the pivot plate centered with respect to the position of the locking lever;

[0046] Fig. 8 is a front view of the locking device of Fig. 1 in a locked position with the tilting plate off-center, displaced to the right with respect to the locking lever;

[0047] Fig. 9 is a front view of the locking device of Fig. 1 in a locked position with the tilting plate off-center, displaced to the left with respect to the locking lever;

[0048] Fig. 10 is a perspective view of the base plate of the interlocking device of Fig. 1;

[0049] Fig. 11 is a perspective view of the tilting plate of the locking device of Fig. 1;

[0050] Fig. 12 is a perspective view of the locking lever of the locking device of Fig. 1;

[0051] Fig. 13 is an exploded view of the locking device of Fig. 1. Fig. 14 is a perspective view of the assembly formed by the tilting plate and the locking lever of a second embodiment of the locking device of the invention, in an unlocked position with the tilting plate centered with respect to the position of the locking lever; and

[0052] Fig. 15 is another perspective view of the assembly in Fig. 14, shown from behind.

[0053] Detailed description of a form of implementation

[0054] Figures 1, 2, and 7-9 show an interlocking device 1 for a landing door of an elevator installation, comprising a base plate 4, a pivot plate 2, an interlocking lever 3, and adjusting and locking means 5 by which the pivot plate 2 and the interlocking lever 3 are displaceable relative to each other along an adjusting direction. Furthermore, as will be explained in detail later, the interlocking device 1 includes a braking device 6 by which the pivot plate 2 is displaced relative to the interlocking lever 3 with some resistance when the adjusting and locking means 5 are in an adjusting position rather than a locking position.

[0055] The base plate 4, shown in isolation in Fig. 10, is provided with a tilting axis 41 perpendicular to the surface of the base plate 4, about which the tilting plate 2 and the locking lever 3 tilt.

[0056] The tilting plate 2, shown in isolation in Fig. 11, is mostly made up of a front surface 20 that defines a vertical plane in which the plate can be tilted with respect to the base plate 4 around the tilting axis 41. On the tilting plate 2 shown, two drive wheels 21 and 22 are arranged with respective axes of rotation perpendicular to the front surface 20. In other, unshown, variants of the locking device 1, the tilting plate 2 may be provided with one or more drive wheels.

[0057] As for the release lever 3, shown in isolation in Fig. 12, it can pivot around the pivot axis 41, and the pivoting movement is integral with the pivoting movement of the rocker plate 2, since they are coupled together by the adjusting and fixing means 5. The locking lever 3 is arranged between the base plate 4 and the rocker plate 3, as shown in Fig. 13, and is formed mostly by a main surface 30 parallel to the front surface 20 of the rocker plate 2. The rocker plate 2 is superimposed on a part of the locking lever 3, exposing at least one switch contact 33 provided at one of the lateral ends of the locking lever 3.

[0058] The tilting plate 2 and the locking lever 3 comprise adjusting and locking means 5 by which the tilting plate 2 and the locking lever 3 are displaceable relative to each other along an adjusting direction that lies in a plane perpendicular to the tilting axis 41, and by means of the adjusting and locking means 5 the separation distance or displacement in that direction can be adjusted and fixed. According to the embodiment shown, these adjusting and locking means 5 consist of two oblong adjusting slots 51 parallel to the adjusting direction, two adjusting screws 52, and two locking nuts 53. The stem of an adjusting screw 52 is arranged through each adjusting slot 52, and a locking nut 53 is arranged at the end of each screw. A washer may be placed between the locking nut 53 and the adjusting slot 52.

[0059] As shown in Fig. 12, the stems of the adjusting screws 52 are arranged in the locking lever 3, protruding perpendicularly from the main surface 30. These stems can be welded to the main surface 30 or screwed into a threaded hole provided in the locking lever 3, but in either case, the stems of the adjusting screws 52 can only be moved in their axial direction with respect to the main surface 30, but they can be moved relative to the rocker plate 2, and more specifically, the adjusting slots 52 can be moved relative to the stems of the adjusting screws 52 along the longitudinal direction of said slots as long as the fixing nuts 53 have not been tightened against the slots.That is, when the adjusting screws 52 are loose, with their nuts 53 untightened, the rocker plate 2 can be pushed by hand and moved from side to side, for example, to the left (see Fig. 9) or to the right (see Figs. 2 and 8) with respect to an initial centered position such as that in Fig. 1 or Fig. 7. When the adjusting nuts 53 are tightened or screwed in until they press against the adjusting slots 52 and can no longer be tightened, then the position of the rocker plate 2 with respect to the locking lever 3 is fixed.

[0060] Currently, for the commissioning of an elevator, all the interlocking devices of the doors of each landing must have their drag wheels or similar elements centered with respect to the position of the blades coming from the cabin door so that the opening and closing of the cabin doors and the landing where the cabin is located is practically simultaneous.

[0061] Finding that centered position of the drag wheels of each landing interlock device is a task for the adjusting operators.In known interlocking devices, this task is time-consuming and labor-intensive, as operators have to position the interlocking device with the adjusting screws 52 loosened, i.e., without fully tightening the nuts 53, to manually move, on each landing, each pivot plate 2 with respect to the interlocking lever 3 so that the drive wheels are centered with respect to the blades, when the blades pass from floor to floor between the wheels without touching them, and also centered when the car reaches the landing and the blades make pressure contact with the drive wheels (for example, when the blades expand, if they are expansion blades, or when they contract if they are compression blades) so that the interlocking lever pivots and the device moves to an unlocked position to open the landing door (open the car door lock).Each landing door has its own adjustments, and some may be more to one side than others. Finding and fixing the centered position of the wheels on each landing is time-consuming and labor-intensive, as the adjuster has to go up and down from the elevator car several times per landing to measure, move, tighten the nuts, re-test, loosen the nuts again to move the tilting plate further to one side, etc.

[0062] The locking device 1 shown in the figures facilitates this adjustment task to find the centered position of the drive wheels 21 and 22; in fact, the manual adjustment task is eliminated and the operator only has to fix the screws, i.e., tighten the nuts 53, in a position of the adjusting screws 52 in the adjusting slots 51 that will be given by the locking device 1 itself. This is achieved thanks to the braking device 6 described below, in conjunction with the adjusting and fixing means 5.

[0063] The brake device 6, shown in detail in Fig. 6, consists of an oblong brake groove 61 parallel to the regulating direction (the same direction in which the regulating grooves 51 extend) and a brake insert 62 provided with some elasticity, inserted with contact between the two sides of the brake groove 61 that are parallel to the regulating direction.

[0064] In the locking device 1 shown in the figures, the brake insert 62 is configured by a plastic strip (see Fig. 4) and is arranged in the locking lever 3, while the brake groove 61 is in the rocker plate 2. A preferred possibility is that the plastic strip is fixed to the locking lever 3 by means of two tabs 63 through which it is press-fitted into a through hole 33 made in the locking lever 3, as shown in Fig. 5.

[0065] Other embodiments not shown may have the brake slot 61 in the locking lever 3 and the brake insert 62 in the rocker plate 2, although for reasons of convenience and assembly, the option shown is preferred.

[0066] The braking device 6 causes the tilting plate 2 to move relative to the locking lever 3 with some resistance when the adjusting screws 52 are loosened, i.e., with the nuts 53 untightened. During elevator startup, to find the centering position, the guide pins contact the drive wheels 21 and 22 and move them. As they move, the tilting plate 2 moves relative to the locking lever 3. This occurs because, with the adjusting screws 52 loose, the adjusting slots 51 of the tilting plate 2 move relative to the stems of the adjusting screws 52, which are fixed to the locking lever 3.However, because the brake insert 62 has some flexibility and is inserted in superior internal contact with the sides of the brake groove 61, which forms part of the tilting plate 3, when the drive wheels 21 and 22 are moved by the blades, the brake groove 61 moves by the same amount as these wheels in the regulating direction, but with some friction with respect to the brake insert 62. When the drive wheels 21 and 22 cease to be moved by the blades (in elevator tests involving moving the car between floors and opening and closing the landing door), the position in which they have moved will not change thanks to the brake device 6.It is then that the adjusting operator only has to access the locking device and fix the regulating screws 52 in the position in which they have remained inside the regulating slots 51, tightening the nuts 53 against the slots to immobilize the regulating screws 52, because that position will be the centered position of the drag wheels 21 and 22 with respect to the blades.

[0067] Since the construction of the various landings is not of millimeter precision, each locking device will have different centering positions. For example, in some cases, the resulting centering position may result in the tilting plate 2 being displaced further to the left than in others. For instance, if we compare Fig. 9 with Fig. 7, we see that after processing, the tilting plate 2 is displaced as far to the left as the length of the adjustment slots 51 allows, because the adjustment screws 52 are now at the right end of the slots. However, in the locking device of Fig. 8, the opposite has occurred: the position in which the drive wheels 21 and 22 are centered with respect to the locking pins is a position in which the tilting plate 2 is displaced with respect to the locking lever 3 as far to the left as the length of the adjustment slots 51 allows.It is understood that the length of the adjustment slots 51 is such that it covers the usual deviations that occur in the construction of the landings, so that the centered position of the drag wheels 21 and 22 with respect to the blades is achieved, that is, that the slots are not too short preventing the tilting plate 2 from being able to move the necessary distance when moved by the blades so that the wheels are centered.

[0068] For example, in the case of the locking device of Fig. 1 and 7, the drive wheels 21 and 22 have practically not moved when contacted by the blades, because we see that the adjusting screws 52 are in the middle of the length of the adjusting slots 51, and also the brake insert 62 occupies the center of the length of the brake slot 61.

[0069] Initially, when the interlocking device 1 is installed on each landing, it is positioned with the adjusting screws 52 centered along the length of the adjusting slots 51, but with the nuts 53 loose. In this position, the brake insert 62 is also centered along the length of the brake slot 61. The elevator is then put into operation, and the control arms move the drive wheels 21 and 22 to the left or right, to a greater or lesser degree, if they are off-center relative to the control arms. Once the control arms stop moving the wheels, the brake device 6 holds this position, allowing the adjustment technicians to finally secure it by tightening the nuts 53.

[0070] Figures 14 and 15 show another embodiment of the locking device 1, which, unlike the previous one, has the adjusting and locking means 5 located on the upper part. Specifically, it can be seen that, in addition to the front surface 20, the pivot plate 2 is formed by a locking tab 23 configured on its upper edge as a fold perpendicular to the front surface 20. The locking lever 3, in addition to the main surface 30, is formed by a wing 31 parallel to the locking tab 23. The adjusting and locking means 5 are arranged on the locking tab 23 of the pivot plate 2 and on the wing 31 of the locking lever 3.

[0071] In particular, it is noted that the adjusting and fixing means 5 of this embodiment comprise two oblong, spaced adjusting slots 51, each extending in a direction parallel to the adjusting direction, two adjusting screws 52, two nuts 53, and two washers. Each of the adjusting screw shanks 52 is positioned through a respective fixing hole provided in the fixing flange 23 and also through a respective adjusting slot 51, capable of occupying any position along the respective adjusting slot 51. Using the fixing nuts 53, the adjusting operators will fix the adjusting screws 52 in the position they have reached with respect to the respective adjusting slots 51 after the guides have moved the drive wheels 21 and 22.Regarding the brake device 6, the brake groove 61 is arranged on the rocker plate 2, specifically on the plate having the front surface 20, and the brake insert 62 is arranged protruding from the main surface 30 of the locking lever 3 inserted into the brake groove 61.

Claims

1. An actuating device (1) for a landing door of an elevator installation, comprising: - a base plate (4) provided with a tilting axis (41) perpendicular to the surface of the base plate (4); - a tilting plate (2) comprising mostly a front surface (20) defining a vertical plane in which the plate is tiltable with respect to the base plate (4) about the tilting axis (41), in which at least one drive wheel (21, 22) is arranged with a respective axis of rotation perpendicular to the front surface (20), and - a release lever (3), tiltable with respect to the base plate (4) about the tilting axis (41), disposed between the base plate (4) and the tilting plate (2), formed mostly by a main surface (30) parallel to the front surface (20) of the tilting plate (2), the tilting plate (2) being superimposed on a part of the locking lever (3), exposing at least one switch contact (33) provided at one of the lateral ends of the locking lever (3), characterized by The tilting plate (2) and the locking lever (3) comprise adjusting and fixing means (5) by which the tilting plate (2) and the locking lever (3) are displaceable relative to each other along an adjusting direction that lies in a plane perpendicular to the tilting axis (41), the displacement distance being adjustable and fixed along said direction, the adjusting and fixing means (5) being formed by at least one oblong adjusting slot (51) parallel to the adjusting direction, at least one adjusting screw (52) disposed through the adjusting slot (52) and capable of occupying any position along the adjusting slot (52), and at least one fixing nut (53) by which the adjusting screw (52) can be fixed by tightening the nut (53) in a position along the adjusting slot (51).with at least one adjustment slot (51) provided on the rocker plate (2) or on the locking lever (3), and because the locking device (1) comprises a brake device (6) by which the rocker plate (2) is displaced relative to the locking lever (3) with some resistance, wherein the brake device (6) is formed by an oblong brake groove (61) in a direction parallel to the regulating direction and by a brake insert (62) provided with some elasticity, inserted with contact between the two sides of the brake groove (61) parallel to the regulating direction, the brake groove (61) being displaceable relative to the brake insert (62) with some friction between the brake insert (61) and the two sides of the brake groove (62) between which it is inserted with contact, and wherein the brake groove (61) is arranged in the rocker plate (2) and the brake insert (62) in the locking lever (3), or vice versa.

2. The locking device (1) according to claim 1, characterized in that the brake groove (61) is arranged in the rocker plate (2) and the brake insert (62) in the locking lever (3).

3. The locking device (1) according to claim 1 or 2, characterized in that the brake insert (62) is configured by a plastic strip.

4. The locking device (1) according to claim 3, characterized in that the plastic strip is fixed to the locking lever (3) by means of two tabs (63) through which it is press-fitted into a through hole (33) made in the locking lever (3).

5. The locking device (1) according to any one of the preceding claims, characterized in that the regulating and fixing means (5) formed by the at least one oblong regulating slot (51), the at least one regulating screw (52) and the at least one tightening nut (53), are arranged on the front surface (20) of the rocker plate (2) and on the main surface (30) of the locking lever (3).

6. The locking device (1) according to claim 5, characterized in that the regulating and fixing means (5) comprise at least two oblong, spaced regulating slots (51) extending in a direction parallel to the regulating direction, at least two regulating screws (52), each arranged through a respective regulating slot (51) and capable of occupying any position along the respective regulating slot (51), and at least two respective fixing nuts (53), one for each regulating screw (52), with which each regulating screw (52) can be fixed by tightening its respective nut (53) in a position along the respective regulating slot (51) in which it is arranged.

7. The locking device (1) according to claim 6 or 7, characterized in that the adjustment slot (51) or adjustment slots (51) are arranged on the front surface (20) of the rocker plate (2) and the stem of the adjustment screw (52) or the stems of the adjustment screws (52) of the adjustment and fixing means (5) are fixedly attached to the main surface (30) of the locking lever (3).

8. The locking device (1) according to any one of claims 1 to 4, characterized in that, in addition to the front surface (20), the tilting plate (2) is formed by a fixing tab (23) configured on an upper edge of the tilting plate (2) as a fold in the direction perpendicular to the front surface (20), in that the locking lever (3), in addition to the main surface (30), is formed by a wing (31) parallel to the fixing tab (23), and in that the adjusting and fixing means (5) are arranged on the fixing tab (23) of the tilting plate (2) and on the wing (31) of the locking lever (3).

9. The locking device (1) according to claim 8, characterized in that the at least one adjustment slot (51) is arranged in the wing (31) of the locking lever (3) and the stem of the at least one adjustment screw (52) is arranged through a respective fixing hole provided in the fixing tab (23) of the rocker plate (2) and through the adjustment slot (51).

10. The locking device (1) according to claim 8 or 9, characterized in that the regulating and fixing means (5) comprise at least two oblong, spaced-apart regulating slots (51) each extending in a direction parallel to the regulating direction, at least two regulating screws (52) each with its stem arranged through a respective fixing hole provided in the fixing flange (23) and also arranged through a respective regulating slot (51), capable of occupying any position along the respective regulating slot (51), and at least two respective fixing nuts (53), one for each regulating screw (52), with which each regulating screw (52) can be fixed by tightening its respective nut (53) in a position along the respective regulating slot (51) in which it is arranged through.

11. The locking device (1) according to any one of the preceding claims, characterized in that the length of the oblong brake groove (61) measured in the regulating direction is equal to or greater than the length of the at least one oblong regulating groove (51) measured in the regulating direction.

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