RU2398727C2 - Method and device to actuate elevator cab catchers - Google Patents

Abstract

FIELD: transport. ^ SUBSTANCE: proposed device comprises speed limiter decelerating cable 122 that, when decelerated, actuates catchers. Catcher actuator 120 is arranged between speed limiter cable 122 and elevator cab 110 connected with two ends (122a, 122b) of said cable (122) and secured to elevator cab (110). Two ends (122a, 122b) of said cable (122) are secured on movable parts (124, 126) of catcher actuator (120). Proposed device actuates catchers by tensioning speed limiter cable or in the case there is no said tensioning. Proposed device and method allow, in the of cable breakage or tensioning force falling beyond tolerances, changing catcher actuator from normal operating state into that of actuation. Note here that catcher actuator braking lever 140 changes catcher actuator from normal operating state into that of actuation. ^ EFFECT: higher operating safety. ^ 10 cl, 7 dwg

Description

FIELD OF THE INVENTION

The present invention relates to a device for actuating catchers of an elevator car or a loading platform of a lift, as well as to a corresponding method.

State of the art

For most moving objects, such as vehicles in automated production and handling equipment or, for example, elevators, etc., the determination or control of the speed of the moving object, in particular for the elevator, the speed of movement of the cabin, is crucial, as this depends equipment performance, as well as the safety of people or goods.

In relation to moving objects such as elevator cabs, the mechanical safety system proved to be good, in addition to the usual load-bearing ropes on moving parts, for example, the cab, another tensioned rope is fixed, hereinafter referred to as the speed limiter rope, which is thrown over elevator shaft, usually a fixed tension unit.

A similar security system is described, for example, in DE 29912544 U1. This document describes a device for limiting the speed of elevators, which includes a wheel of a speed limiter, a rope of a speed limiter, car catchers and a mechanism for activating catchers. The mechanism for activating the catchers is made here as a centrifugal speed limiter. Such a mechanism allows, at a certain excess of the cab speed (for example, 20% higher than the maximum permissible maximum speed), to block the rotation of the speed limiter wheel (tension unit) by means of the built-in centrifugal speed limiter, as a result of which the speed limiter rope also stops moving under the action of the tension unit. The stop of the speed limiter rope and the continued movement of the cab or the frame of the cab lead to an increase in the tension of the rope and the emergency brake or catchers that brake or stop the elevator car.

In the case of a decrease in the rope tension of the speed limiter, in particular when the rope tension is relaxed (for example, due to a break), such a safety system is damaged. In this case, the rope of the speed limiter can slip in the groove of the tension unit or wheel of the speed limiter, and the emergency brake will not work due to the lack of tension on the rope of the speed limiter.

The emergency brake when using a centrifugal or similar speed limiter also cannot work, for example, if the rope of the speed limiter is not in the prescribed position, broken or not at all.

Such conditions of the speed limiter rope are usually detected electrically by the so-called triggering from the slack of the speed limiter rope on one of the tension blocks, after which the usual service brake also electrically performs an emergency stop of the elevator. However, catchers do not work under such conditions, which, for example, in the event of a fire or improper evacuation of people, can create an additional danger up to the cabin falling into the elevator shaft. In the event of a fire in the elevator shaft, it may happen, for example, that the ropes of the speed limiter will be burned first without triggering the catchers, and then the supporting ropes will fail, which can lead to the fall of the elevator cabs.

Disclosure of invention

The objective of the invention is, first of all, to increase safety during operation of the elevator.

Further, the objective of the invention is that in systems that implement control of the speed of the cabin or the loading platform by cable transmission to catchers, it is possible to quickly and easily detect malfunctions caused by too low tension of the rope or the absence of a rope and, despite the absence of a rope, to activate cabin catchers.

The solution proposed by the invention is characterized in that the device and the corresponding method of activating the catchers of the elevator car or the cargo platform of the elevator make it easy to detect both the excess of the speed of the car or the cargo platform and the decrease or absence of tension of the rope of the speed limiter and in both cases simply, reliably and directly set the catchers in action. In particular, due to the device proposed in the invention, it is possible to avoid a situation in which, at first, the tension of the rope of the speed limiter decreases or disappears, and after that, for this reason, it becomes impossible to actuate the catchers.

Preferred embodiments of the invention are the subject of the dependent claims.

It is preferable that the two ends of the rope of the speed limiter be fixed on the parts of the mechanism for activating the catchers that are movable with respect to each other. This embodiment makes it possible to simply realize a normal operating position in which sufficient tension of the speed limiter cable is provided, as well as a tripping position in which the tension of the speed limiter cable decreases beyond a certain value. In this case, both parts of the mechanism for activating the catchers in the normal operating position are at a first distance from each other, and in the actuation position - at a second distance from each other, different from the first. The relative displacement of both parts of the mechanism for activating the catchers and the associated change in the length of the mechanism make it possible to simply actuate the catchers of the brake mechanism installed on the cab or cargo platform.

Preferably, the device according to the invention is characterized in that it can actuate catchers both with or without the aid of the tension of the rope of the speed limiter. This design simply provides reliable braking of the elevator car or lift platform in many situations.

According to one of the preferred embodiments of the invention, in the case of an unacceptable extension of the rope of the speed limiter or an unacceptable decrease in the tension of the rope, or when the cable breaks, the engagement mechanism switches from the normal operating position to the actuation position, and one of the parts of the engagement mechanism engaging with respect to each other moves relative to the second of the moving parts under the action of continuously accumulated energy in the actuation position.

Moreover, for energy storage, it is particularly preferable that the mechanism for activating the catchers contains a pre-tensioned spring. Depending on the embodiment of the device, this may be a tension spring or a compression spring. In the working position, the rope tension of the speed limiter compensates for the force of the spring. If the tension is loosened or the rope of the speed limiter breaks, this will lead to a change in the length of the spring, as a result of which the brake mechanism of the elevator car or the load platform of the elevator interacting with the spring will work.

The energy accumulated by the spring along the entire length of its stroke corresponds to the force, which in turn corresponds to the gravity of the maximum single length of the rope of the speed limiter from top to bottom in total with the response force of the catchers.

It is advisable to provide a device, thus providing movement of the mechanism for activating the catchers relative to the elevator car, so that the mechanism for activating the catchers in case of reaching a speed exceeding a predetermined maximum speed can move from the normal operating position to the actuation position. This device is preferably provided with a longitudinal groove on the mechanism for activating catchers, which includes a finger provided on the elevator car or the loading platform of the elevator. If, due to jamming of the speed limiter rope due to excess of the cab speed, the movement slows down or the speed limiter rope stops, the cabin will be able to move relative to this rope, limited by the length of the longitudinal groove. This relative movement can easily and reliably actuate the catchers provided on the elevator car or lift platform.

Preferably, the catch mechanism is equipped with a braking lever movable relative to the elevator car. Such a braking lever implements the interaction between the mechanism for activating catchers and catchers located on the elevator car or the cargo platform of the elevator, so the movement of both parts of the mechanism for activating the catchers relative to each other or the mechanism relative to the elevator car or the cargo platform of the elevator can trigger the catchers.

According to a particularly preferred embodiment of the invention, the first part of the mechanism for activating the catchers is made in the form of a housing, and the second in the form of a pusher moving in the housing. It is further advisable that the rope of the speed limiter be thrown through two tension blocks, with one end of the rope of the speed limiter attached to the body, and the other to the pusher moving in the body. It is further advisable that the body on the outside has a pad provided with a longitudinal groove in which a finger fixed to the cab could move. The pusher is equipped with a braking lever that can drive the catchers. In this case, the pusher in normal operation, pulling the spring, in particular the tension spring, ensures that the working position of the mechanism for activating the catchers is maintained in such a way that the rope of the speed limiter moves synchronously, i.e. at the same speed as the elevator car or lift platform. Moreover, only in case of excess of speed and the braking of the rope of the speed limiter due to it, in the presence of rope tension, a relative movement of the finger fixedly mounted on the elevator car in the longitudinal groove occurs. On the other hand, in the case of a decrease in the rope tension of the speed limiter at a certain value of the rope tension, the spring force causes a relative movement of the pusher inside the housing, as a result of which there is also a relative movement between the pusher and the braking lever, leading to the triggering of catchers.

Preferably, the housing consists of two moving relative to each other and fixed components, in particular of pipes, which allows you to adjust the total length of the housing. This measure, in addition to or alternatively to regulating the rope tension of the speed limiter by acting on one of the tension blocks, also makes it possible to regulate the rope tension.

Preferably, the housing has a guide sleeve for the pusher, with one end of the sleeve serving as a stop for the head of the pusher. It is advisable if this sleeve is also made movable and fixed relative to the body, so that by appropriate movement of the sleeve relative to the body, it is possible to coordinate the spring tension with the rope tension of the speed limiter.

The mobility of the housing components with respect to each other or the sleeve relative to the housing components, as a rule, is realized by means of a corresponding internal or external thread.

Brief Description of the Drawings

Preferred embodiments of the invention are explained in more detail with reference to the accompanying drawings, which show:

figure 1 is a side view in section (without precise indication of dimensions) of a preferred embodiment of a device interacting with a cabin during normal operation of the elevator;

on figa - 2c - simplified in comparison with figure 1, a side view in section of the proposed invention in the device in various operating conditions;

figure 3 is a perspective view of a preferred embodiment of the mechanism for activating catchers used according to the invention;

figure 4 is a side view in section of a mechanism for activating the catchers of figure 3;

figure 5 is a perspective view of the beam of the lower frame of the elevator car, on which is mounted proposed in the invention, the mechanism for switching on catchers.

Figure 1 shows a diagram of an elevator, which includes the device according to the invention in a preferred embodiment with a common designation 100. The elevator car 110 is schematically shown on which the catchers 146 are mounted.

The device according to the invention has a mechanism for activating catchers 120 and a rope 122. The rope 122 is thrown through two tension blocks, of which the first tension block 150 is located in the lower part of the elevator shaft, and the second tension block 152 is in the upper part of the elevator shaft.

The first (upper) end 122a of the speed limiter rope 122 is connected to the upper connecting element 120a of the catch mechanism, and the second (lower) end 122b of the speed limiter cable 122 is connected to the lower connecting element 120b of the mechanism 120. The connecting elements 120a and 120b are preferably designed as wire clips . The upper connecting element 120a is located on the upper end of the housing 124 of the mechanism 120 for the inclusion of catchers. A lower end 122b is attached to the bottom of the pusher 126 moving in the housing 124.

The tension of the rope 122 of the speed limiter can be adjusted in a known manner by changing the position of the tension blocks 150, 152, for example, by means of a counterweight 154. An additional or alternative possibility of adjusting the tension of the rope is explained below with reference to FIG. 4. The rope tension creates a downward force, indicated by arrow G, which acts on the pusher 126.

Further, the compression spring 130 acts on the pusher 126 in the opposite direction to the rope tension (shown by arrow F), the pusher head 126a in the normal operating position shown in FIG. 1 abuts against the upper support (or emphasis) 128 of the pusher. A hole is provided in the upper support of the pusher 128 through which the spring 130 makes contact with the head part 126a of the pusher 126. Thus, in the normal operating state shown in FIG. 1, the force due to the tension of the speed limiter rope is greater than the force created by the spring 130 .

The tension of the speed limiter rope 122 and, therefore, the pre-tension between the upper and lower connecting elements 122a, 122b of the speed limiter cable must be such that in the normal case of braking, i.e. at a high cabin speed, a normally functioning and operational rope 122 and the subsequent braking of the rope 122 by the speed limiter, the catchers 146 were triggered both when moving down and when moving upward under the action of the tension of the rope of the speed limiter.

Further, the rope tension should be so large that the pusher 126 is pressed firmly against the upper side of the upper support 128 of the pusher and so that the pusher or its head part 126a does not rise during the normal movement of the elevator under the action of spring force 130 and / or accelerations or braking of the cab, i.e. . in the case of FIG. 1, the upward pressure of the compression spring acting on the plunger (arrow F) should more than be compensated by the tension of the rope (arrow G).

The pusher 126 can move in the longitudinal direction, i.e. in the direction of movement of the mechanism for activating the catchers 120, or in the direction of movement of the cabin on which the housing 124 is movably mounted.

On the outside of the housing 124, a cover plate 131 is provided with a longitudinal groove 132 extending parallel to the direction of movement of the cab 110. This pin includes a pin 111 fixed to the cab 110. Thus, along the length of the longitudinal groove 132, as will be explained below, the cab 110 and the housing 124 mechanisms for activating catchers are movably connected to each other.

From the head part 126a of the pusher 126 through the hole 144 in the housing 124, not shown in FIG. 1, but indicated in FIG. 3, the brake lever 140 extends in the direction of the cabin 110. The brake lever 140 at its end facing the elevator car is pre-tensioned by means of a tension spring 112 fixed to the cab. The brake lever 140 is rotatably mounted on the housing side and on the cab side, and furthermore, on the cab side, it is connected to the catchers 146 schematically shown in FIG. lash lever (which will be discussed in more detail below). The connection element between the brake lever 140 and the catchers 146 is schematically shown in figures 1 and 2 and has the designation 142.

The upper tension unit 152, it is advisable to perform as a speed limiter pulley. Due to this, when exceeding the permissible maximum speed of the speed limiter rope 122 and the cabin 110 moving in the normal mode at the same speed of the cabin 110, the tension unit 152 is blocked and the speed limiter brakes, resulting in a relative movement between the speed limiter cable 122 and, therefore, the device 120 the inclusion of catchers, on the one hand, and the cabin 110, on the other hand.

The lower tension unit 150 is expediently designed as a tension roller that can be moved or rotated and connected to a counterweight 154 so that the speed limiter cable 122 constantly maintains a certain minimum tension. This minimum tension ensures a reliable run of the rope 122 in the grooves of the tension blocks 150, 152 and, therefore, reliable operation of catchers in the event of jamming of the tension block 152, made as a speed limiter pulley.

Various operating states or operating states of the device of the invention are explained in more detail below, for example, FIGS. 2a - 2c.

On figa in a simplified form once again schematically shown proposed in the invention device in normal operating condition. As already explained with reference to figure 1, the tension of the rope 122 of the speed limiter is large enough, therefore, the head part 126a of the pusher 126 is pressed against the upper support 128 of the pusher.

The speed of the elevator car 110 and the speed limiter rope 122 interacting with the car 110 is within acceptable limits, i.e. blocking or braking of the tension unit 152 does not occur.

In this state, as already mentioned, the pusher 126 is pressed against the upper support 128, and the pin 111 mounted on the cab is located at the upper end of the longitudinal groove 132.

The brake lever 140 is in a neutral position, i.e. the operation of the catchers 146 connected by the connecting element 142 with the braking lever 140 does not occur.

2b, the device is shown in a state in which the speed limiter rope 122 is not tensioned. Such a condition may occur, for example, due to the breakage of the rope. The rope breakage point is shown in the diagram of Fig. 2b by the arrow S. A similar situation also occurs if the tension of the rope 122 decreases outside a certain minimum value.

In the absence of tension on the rope 122 of the speed limiter, the compression spring 130 moves up the pusher 126 in the housing 124 and thereby diverts the head part 126a of the pusher from the upper support 128. This is due to the fact that only the upward force of the spring 130 acts on the pusher (arrow F in FIG. .one). This means that the braking lever 140, connected with the pusher 126 or with the pusher head 126a, is pushed upward, so that the catchers 146 are turned on via the connecting element 142. In this case, the spring supporting body with the upper edge of the longitudinal groove 132 is supported on the pin 111.

In this way, unlike traditional devices, reliable catching of the catchers 146 is ensured even with an unstretched rope 122 of the speed limiter.

The third operating state corresponding to the normal operating state of the speed limiter is shown in FIG. 2c. Here we will proceed from the fact that the elevator car 110 exceeded a certain maximum speed.

Since the cabin 110 interacts with the rope 122 of the speed limiter, it communicates the corresponding rotation speed to the upper tension unit 152, which, as already mentioned, is equipped with a known locking device (with designation 153 in the diagram). Such a locking device 153 can be performed, for example, as a centrifugal. Blocking of the tension unit 152 leads to braking or stopping of the speed limiter cable 122, while the car 110 continues to move, as a result of which the cable 122 and therefore the fishing gear engaging mechanism 120 are moved relative to the car 110. It should be noted that the cable tension as well as the force springs 130 acting on the plunger 126 are substantially unchanged from the normal operating state shown in FIG. 2a.

This relative movement between the mechanism for activating the catchers 120 and the elevator car 110 through the brake lever 140 and the connecting element 142 is transmitted to the catchers 146 and causes them to trigger.

Let us explain in more detail the preferred embodiment of the mechanism 120 for turning on the catchers using FIGS. 3 and 4.

Figure 3 shows a perspective view of a preferred embodiment of a mechanism 120 for activating catchers according to the invention. Here you can see the housing 124, the elements of the attachment of the rope 120a, 120b, the lower end of the pusher 126, the lining 131, as well as the longitudinal groove 132 of the lining. In addition, a brake lever 140 and an opening 144 protruding from the housing 124 are shown.

It can further be seen from FIG. 3 that the housing 124 has an upper or outer part 124a and a lower or inner part 124b. Parts of the housing 124a and 124b can be made, for example, in the form of pipes.

The listed components are shown in FIG. 4, where a sectional view of the mechanism for activating the catchers of FIG. 3 is presented.

Pipes 124a, 124b in zone 125, in which they mutually overlap, are movably and fixably connected to each other, for example, by means of corresponding threaded devices. Thus, the total length of the housing 124 can be changed or adjusted by appropriate movement of the pipes 124a, 124b.

The pusher 126 can be mounted to move in the longitudinal direction in the sleeve 127, which can be moved and fixed in the pipes 124a, 124b. The sleeve 127 with its upper end 127a forms the upper support 128 of the pusher, i.e. emphasis for its head part 126a, restricting the movement of the pusher down. Thus, due to the possibility of regulating and fixing the sleeve 127 in the longitudinal direction, an adjustable stop is provided for the pusher to move down.

In the embodiment of FIG. 3, the downwardly extending end of the speed limiter cable 122a is attached to the end of the upper pipe 124a. The already mentioned housing opening 144 is advantageously provided in the upper pipe 124a. Through this hole, as already mentioned, the brake lever 140 can pivot outwardly mounted on the pusher 126 with the possibility of rotation. Preferably, the housing or upper pipe 124a has at least two openings 144 laterally offset from each other, and at least one of these openings can be used to simplify mounting of the brake lever 140 on the follower 126. As shown in FIG. 4, the fastening of the brake lever 140 to the pusher 126 is expediently provided by a hinge 140a. Further, in Fig. 4, solid lines show the normal operating position of the brake lever 140 and dashed lines indicate its position when the catchers are triggered.

Between the sleeve 127 and the lower pipe 124b is an elastic disk 134 mounted on the sleeve 127 with the possibility of longitudinal movement and fixing in a certain position. Preferably, the resilient disk 134 can move in the longitudinal direction and also be fixed in the upper or lower pipe. The resilient disk serves as a lower stop for the spring 130.

To move the sleeve 127 relative to the elastic disk 134 in order to control the spring force on the sleeve 127, it is advisable to provide an external thread, and in the elastic disk 134 - the corresponding internal thread.

The elastic disk 134 is expediently mounted around the perimeter on the lower pipe 124b. By means of a suitable thread, the elastic disk 134 can be moved relative to the lower pipe. The corresponding thread between the upper and lower pipes allows, by moving the pipes with respect to each other, also moving the elastic disk relative to the upper pipe. In addition, all adjustments can be made by means of an additional part, for example, a lever with a hydraulic, pneumatic or electric drive.

The locking, for example, of the upper pipe 124a with respect to the lower pipe 124b can be ensured after installation in the desired position, for example, by means of a threaded connection through a longitudinal groove 129 in one pipe and threads respectively in another pipe. The sleeve 127 and the lower pipe 124b can, after setting the desired relative position, be locked, for example, by screwing or using a threaded connection 135.

Preferably, sleeve 127 has a polyhedron or other fastener on the lower end that is schematically shown in FIG. 4 and is designated 127b to facilitate gripping while scrolling or holding sleeve 127 when other parts, such as lower tube 124b, need to be rotated.

A spring 130 is located between the elastic disk 134 and the pusher head 126a, and, as mentioned, the upper end 127a of the sleeve in the illustrated embodiment forms a support 128 for the pusher head 126a when tensioning the spring by tensioning the speed limiter cable 122. When the rope of the speed limiter is tensioned by increasing the distance between the two tension units or by corresponding movements in the mechanism for activating the catchers, the spring 130 is tensioned, and after pressing the pusher 126 against the upper support 128, the tension of the rope 122 of the speed limiter can be increased if necessary.

In the presented embodiment, the mobility of the sleeve 127 allows you to adjust the height of the upper support of the pusher or the lower stop of the pusher 126, therefore, on elevators and elevators of various types with different designs of the brake lever 140, you can adjust or take into account the movement of the lever, the ratio of lengths or forces.

It has already been said that the tension of the rope 122 of the speed limiter can be adjusted by turning the lower guide roller 150. Additionally or alternatively, the tension of the rope and / or the preliminary tension of the spring 130 can be changed by moving the pipes 124a, 124b, as well as the sleeve 127 with respect to each other to friend.

After adjusting the tension of the rope 122 of the speed limiter, for example, by appropriately positioning the sleeve 127, it is possible by adjusting the lower pipe 124b relative to the upper pipe 124a to adjust the tension of the spring 130 so that under normal braking by catchers, i.e. in case of exceeding the permissible speed of the cabin, the head 126a of the pusher 126 remained pressed with sufficient force to the upper end 127a of the sleeve and did not rise when moving the entire mechanism 120 for activating the catchers relative to the elevator car 110.

Additionally or alternatively, after adjusting the tension of the rope 122 of the speed limiter by appropriate positioning of the sleeve 127 by moving the lower pipe relative to the top, the spring tension can be adjusted so that the pusher head 126a moves away from the upper end when the cable of the speed limiter is lost, damaged or breaks 122 127a, under the action of the accumulated force of the spring 130 (pre-tension) and the moving pusher, the brake lever 140 was turned on In this case, the mechanism for activating the catchers 120 relies on the connection point with the cabin, the frame of the elevator car or the cargo platform of the elevator on the finger 111 in the longitudinal groove 132.

Preferably, the brake lever 140 is, firstly, connected via a hinge 140a to the pusher 126 and, secondly, pivotally or pivotally connected to the elevator car and has a third articulated connection for activating the catchers. 2a-2c, the second such hinge on the cab is designated 140b. The third swivel is a special version of the connection 142.

Finally, FIG. 5 shows a portion of the lower frame of the elevator car, on which a catcher engaging mechanism 120 is mounted, which is shown, for example, in FIGS. 3 and 4. In addition to a catcher engaging mechanism 120, a device 512 provided in the lower frame 510 can be seen. for cabin isolation. Under the beam of the lower frame are roller guides 514. The catchers in figure 5 are designated 516.

Claims (10)

1. A device for actuating the catchers of the elevator car / or the loading platform of the elevator, including a braking rope (122) connected to the cabin or the loading platform, a speed limiter, including catchers when braking the rope, characterized in that between the rope (122) the speed limiter and a loading platform or elevator car there is a mechanism (120) for activating catchers, which is connected to the two ends (122a, 122b) of the rope (122) and is mounted to move on the elevator car (110) or the lifting platform a, and the two ends (122a, 122b) of the rope (122) of the speed limiter are fixed on moving parts (124, 126) of the mechanism (120) for activating the catchers, which are movable relative to each other, while the device is configured to turn on the catchers by means of the tension of the rope of the speed limiter or in the absence of this force, and in the case of extension of the rope (122) of the speed limiter beyond the predetermined maximum value, or a decrease in the tension of the rope beyond the predetermined minimum value, or when the rope breaks about speed limiter, the mechanism for activating the catchers can move from a certain operating position to the actuation position, one of the parts (126) of the mechanism for activating the catchers moving relative to each other by means of a spring (130) continuously accumulating energy, can be moved to the actuation position relative to the other movable part (124) . 2. The device according to claim 1, characterized in that the mechanism for activating the catchers contains a pre-tensioned spring (130). 3. The device according to one of claims 1 and 2, characterized in that it has a mechanism (131, 132, 111) that provides movement of the mechanism (120) for activating the catchers relative to the cabin (110) of the elevator, as a result of which the mechanism for activating the catchers in in case of a certain excess of the speed of the elevator car (110) or the elevator loading platform, it is possible to switch the speed limiter rope from the normal operating position to the normal operating position by braking. 4. The device according to one of claims 1 and 2, characterized in that the mechanism (120) for activating the catchers is equipped with a braking lever (140), movably mounted on the elevator car. 5. The device according to one of claims 1 and 2, characterized in that the second part (124) of the mechanism (120) for activating the catchers is made as a body, and the first part (126) is a pusher that can move in the body (124). 6. The device according to claim 5, characterized in that the housing (124) consists of two parts moving relative to each other (124a, 124b), which allows you to adjust the total length of the housing (124). 7. The device according to claim 5, characterized in that the pusher (126) is installed in the sleeve (127), and one end of the sleeve serves as a stop for the head part (126a) of the pusher (126). 8. A method for activating the catchers of the elevator car or the elevator freight platform, characterized in that between the rope (122) of the speed limiter and the elevator car or the elevator cargo platform there is a mechanism (120) for activating the catchers, connected to the two ends (122a, 122b) of the rope (122) a speed limiter and movably fixed to the elevator car (110) or the loading platform of the elevator, moreover, if the rope breaks or the tension of the speed limiter breaks beyond a predetermined minimum value, the mechanism is turned on I catcher is moved from a normal operating position to the actuation position, whereby the braking lever (140) including a mechanism catcher moves from the working position to the trigger, which then triggers the safety gear connected to the braking lever (140). 9. The method according to claim 8, characterized in that the translation of the mechanism for activating the catchers from the normal operating position to the actuation position is carried out by moving two parts (124, 126) of the mechanism for activating the catchers in relation to each other. 10. The method according to 8 or 9, characterized in that when the speed limiter rope (122) is correctly tensioned, in case of exceeding the preset maximum speed of the elevator car (110), the catchers are activated by locking the speed limiter rope and moving the cabin (110) and the switching mechanism catchers in relation to each other.

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