KR101080661B1 - Lift installation with actuating equipment for actuating a safety brake device, a pull rod for actuating a safety brake device and a method of actuating a safety brake device - Google Patents

Abstract

A lift apparatus with an actuating equipment for actuating a safety brake device, a pull rod for actuating the safety brake device, and a method for actuating the safety brake device are provided to neutralize a longitudinal displacement occurring during actuating the safety brake device by using an elastic tie rod member on a tie rod. More than one moving member are provided to be substantially movable in a vertical direction under the guidance by a guide rail(4). A pair of safety brake devices(6) are implemented on the moving member. The moving member is generally decelerated by a speed sensor. When required, an operational force generated by the speed sensor is transferred to a safety brake member(10) in the safety brake devices(6). The safety brake member(10) and an operational link member(11) are connected to each other via a pull rod(14). The operational link member(11) and the safety brake devices(6) are implemented to be cooperative with each other in various positions of the moving member. The pull rod(14) includes upper and lower pull rod members(15,17) which are elastically connected to each other via a flexible pull rod member(16). Central axis lines of the upper and lower pull rod members(15,17) are variably spaced from each other. When no load is applied, the upper pull rod member(15) is maintained to be substantially straightened with respect to the lower pull rod member(17).

Description

Elevator installation with actuating mechanism for operating the safety brake system, pull rod for operating the safety brake system and method for operating the safety brake system SAFETY BRAKE DEVICE AND A METHOD OF ACTUATING A SAFETY BRAKE DEVICE}

1 shows by way of example an elevator installation with a safety brake attached to a moving body.

Figure 1b shows by way of example an elevator installation with a safety brake arranged on a moving body.

2 shows a part of an actuating link mechanism with an attached safety brake.

3 shows an embodiment of a tie rod.

* Description of the drawing symbols *

1 moving object 2 elevator

3 Counterweight 4 Guide rail

5 Supporting means 6 Safety brake

7 Speed sensing means 8 Carriage support

9 Safety Braking Housing 10 Safety Braking Member                 

11 Operation link mechanism 12 Operation lever

13 Operating cable 14 Tie rod

15 Upper tie rod member 16 Flexible tie rod member

17 Lower tie rod member 18 Shaft

20 Fixing nut 21 Setting nut

22 Upper blade 24 Compensation spring

26 Connection lever 27 Connection rod

28 restraint spring 30 switch

The present invention relates to an elevator installation having an actuating mechanism for operating the safety braking device described in the claims, a pull rod for operating the safety braking device, and a method for operating the safety braking device.

Elevator equipment generally includes one or more cages and counterweights movably disposed within the hoistway. The cage and counterweight are guided in a substantially vertical direction by guide rails. The hoist room and counterweight are connected by supporting means. The cabin and counterweights are protected by a safety brake if necessary. The safety brake operates in the event of an overspeed or when the lift or counterweight unexpectedly moves, stopping the lift or counterweight. The cabin and counterweight are travel bodies. In addition, the safety brake is designed to stop the moving body even when the support means is broken. Safety brakes are also called safety brakes.

Safety brakes are usually mounted in pairs on a moving body and are operated by an associated actuating linkage. In general, the safety brake device is composed of a safety brake housing fixed to the moving body and at least one safety brake member to be coupled by the operation link mechanism during operation. Again the actuating linkage is actuated by another safety device, for example a speed limiter. In such a case, the actuating link mechanism performs other functions. The actuating link mechanism maintains the safety brake member in a ready state, activates the safety brake system if necessary, guarantees electrical monitoring, and restores the safety brake member to the ready state when the safety brake device is released.

The problem with the actuating link mechanism is that the safety brake member must undergo a substantially vertical stroke and a transverse setting movement in order to be engaged. In general, due to the vertical stroke of the safety brake member, the actuating link mechanism moves in the lateral direction with respect to the safety brake member. This causes lateral displacements between the safety brake member and the actuating link mechanism, which can lead to failure of the coupling process and / or damage to the elevator installation. The failure occurs, for example, due to the tilting or jamming of the safety brake member in the guide or due to the failure in the actuating link mechanism. In known arrangements, this disorder does not have a negative result, since usually the actuating link mechanism is arranged in the upper region of the movable body and the safety brake is arranged at the lower end of the movable body. The large distance from the actuating linkage to the safety brakes neutralizes the effects of lateral displacement. Neutralization here means that the effects of lateral displacement are compensated for without any inclination or jamming.

Thus, for example, in the specification of US 3 441 107 an actuating link mechanism is described, in which the vertical stroke is achieved by an actuating link mechanism disposed above the moving body. In this arrangement, a wide gap is formed between the safety brake and the actuating linkage, substantially corresponding to the height of the moving body. In this case, the transverse setting movement with respect to the rail surface is made by a one-dimensional joint in the safety brake member. In this solution, there is no compensation for the lateral displacement caused by the pivoting movement of the actuating lever. Thus, this solution is particularly unsuitable when the actuating link mechanism is arranged directly adjacent to the safety brake. In addition, the joint requires a large space and reduces the strength of the safety braking member in the joint area.

US 2 719 608 describes another actuating link mechanism for actuating the safety brake. Even in this embodiment, the vertical stroke required for the operation of the safety brake device is provided by an operation link mechanism disposed in an upper portion of the cage or in the upper beam of the cage frame. The vertical stroke of the actuating linkage is transmitted by means of a pull rod to a safety brake member arranged under the hoist room. Joints at the top and bottom of the pull rod provide compensation for the lateral displacement caused by the pivoting movement of the actuating lever. In the case of the proposed solution, compensation for the transverse adjustment movement of the safety brake member relative to the rail surface is not provided. This solution is also only available if there is a large distance between the safety brake member and the actuating link mechanism so that uncompensated lateral displacement does not interfere. In addition, a disadvantage of the proposed solution is that the safety brake member acts inadvertently, for example as a result of the safety brake member contacting the rail connection. This is not necessarily detected by the actuating link mechanism since the pull rod tends to bend transversely in the upper joint.

Another embodiment of an actuating link mechanism is described in US 2 274 000, in which an actuating link mechanism is arranged in an upper region of the hoist room, and a vertical stroke is arranged in a safety braking member arranged in the lower region of the hoist room. Delivered.

All the arrangements described have the disadvantage that a wide gap is required between the operating lever and the safety brake member because lateral displacement occurs during the movement of the operation link mechanism and the safety brake member. This connection is not suitable for installation in the immediate vicinity of the safety brake.

Operation with Bowden pull is described in the specification EP 0 806 394. The Bowden pull connects the safety brake member to the actuating link mechanism. The actuating link mechanism can then be placed in almost any desired position on the movable body. This solution has the disadvantage that the Bowden pull must be satisfactorily guided and fixed. Therefore, the mounting thereof is complicated. Easy movement of the system should be checked regularly within the maintenance range. Therefore, Bowden pools are expensive and require a large space for the installation of the connection member.

The outlined embodiment has the following various disadvantages.

-A large distance (corresponding to the height of the moving object) from the actuating linkage to the safety brake is required.

A large space is required to arrange the connecting member in the safety braking member.

-The strength of the safety brake member is reduced.

The solutions are expensive.

It is an object of the present invention as a solution for neutralizing the lateral displacement occurring during the operation of a safety brake member, eliminating the disadvantages of the prior art outlined and also providing an applicable solution without structural modification of the existing safety brake member. Of course, the mounting should be as simple as possible.

This object is achieved by the present invention according to the independent claims of the claims.

The present invention relates to an elevator installation consisting of one or more hoist rooms protected by a safety system against rapid descent or other unexpected movement. The safety system consists of a speed limit system, an actuating link mechanism and a pair of safety brakes. The speed limit system detects the rapid descent or unexpected movement of the moving body and activates the safety brake with the actuating link mechanism. The safety braking device includes at least one safety braking housing and at least one safety braking member, which, in operation, is moved by an actuating link mechanism to an exercise position capable of applying the necessary braking force to the safety braking device. In normal operation, the actuating link mechanism keeps the safety brake member in a ready state and, if necessary, changes the safety brake member to an operational state, guarantees electrical monitoring of the safety brake system and, in the case of resetting or releasing the safety brake, Reset to the ready state.

According to the invention, the safety braking member and the actuating link mechanism are connected by tie rods arranged substantially vertically, the tie rod being substantially rigid in the tension direction and the compression direction, but between the safety braking member and the actuating link mechanism. Allow horizontal displacement of. This is accomplished by providing the tie rods with a flexible tie rod member that allows limited lateral displacement between the upper and lower tie rod members and between the upper and lower ends of the tie rods. The flexible tie rod member has an appropriate bending elasticity. In the unloaded state, the flexible tie rod member holds the upper and lower tie rod members on a single coaxial, so that the upper tie rod member in the unloaded state is substantially straight with the lower tie rod member. The unloaded state corresponds to an uninstalled state that is substantially free of external forces. When the lateral load is applied, the flexible tie rod member allows the deviation of the axis and angle between the upper and lower tie rod members within the range of the lateral displacement generated by the safety brake member and the actuating link mechanism. The bending elasticity of the flexible tie rod member is large enough to neutralize the lateral displacement occurring between the safety brake member and the actuating link mechanism, and the twist of the tie rod is prevented even if a compressive force is generated due to, for example, the safety brake member being pushed upward. Small enough not to occur. The actuating link mechanism is mounted with or near the safety brake device below, above, or in the height of the moving body without compromising the function of the safety system.

The advantage of this configuration is that the distance between the safety brake device and the operation link mechanism can be made small, there is little space for the tie rod arrangement, the strength of the safety brake member is not reduced, and the operation link mechanism and the safety brake The connection structure in the device may not be altered, thereby providing the actuating link mechanism and the safety brake device in a preferred manner in terms of cost and mounting.

Hereinafter, the present invention will be described in detail by way of examples based on the form of the embodiment according to FIGS. 1 to 3.

A schematic configuration of the elevator installation is shown in FIG. 1. The cage 2 and the counterweight 3 are arranged to be movable in the substantially vertical direction by the guide rails 4. The cage 2 is connected to the counterweight 3 by means of support and is driven by an actuating motor. The hoisting chamber 2 and the counterweight 3 are moving bodies 1. In the illustrated embodiment, for example, as required by an elevator standard, such as the European Lift Standard EN81-1, one mobile body 1 has an excess speed or a moving body when the support means 5 are broken. A safety system is provided to stop the operation. The safety system consists of a safety brake (6), an actuating link mechanism (11) (all of these (6, 11) are installed in the lower cage support (8)) and the speed sensing means (7) (actuation cable (13) And an actuating lever 12 connected to the actuating link mechanism 11). Since the illustration is schematic, the kind of the support means is not relevant to the present invention, and if the movable body 1 is properly designed, the cage support 8 can be arranged outside the movable body 1 as in FIG. 1B.

In addition, if necessary, the entire safety system may be installed in the second movable body 2. If the movable body 1 is operated by its own running gear without supporting means, the safety system can be adapted appropriately. For example, if the speed sensing means is configured electronically, operation control of the actuating link mechanism can be made directly.

As is clear from FIG. 1, the safety brake device 6 can be arranged directly under the actuating link mechanism 11. The actuating link mechanism 11 for operating the safety brake 6 is divided into a left part and a right part. These two parts are connected to each other by a connecting rod 27. As shown in FIG. 2, the actuating lever 12 is connected to the shaft 18. The right side of the actuating link mechanism 11 shown so that the right side and the left side moves synchronously is connected to the left side of the actuating link mechanism by the linking lever 26 and the connecting rod 27. The retaining spring 28 holds the actuating link mechanism 11 in the position defined by the actuating contact. The safety braking member 10 is fixed to the tie rod fork 19 by a tie rod 14 in the safety braking housing 9 and arranged substantially vertically. The tie rod 14 is composed of an upper tie rod member 15, a flexible tie rod member 16 and a lower tie rod member 17. The flexible tie rod member 16 allows limited lateral displacement between the upper and lower ends of the tie rod members 15, 17. The flexible tie rod member 16 has an appropriate bending elasticity. In the unloaded or unmounted state, the flexible tie rod member keeps the upper and lower tie rod members 15, 17 on a single coaxial, so that the upper tie rod member 15 in the unloaded state has a lower tie rod member ( 17) and keep the straight line. When the lateral load is applied, the flexible tie rod member causes the gap between the upper and lower tie rod members 15 and 17 to be within the range of the lateral displacement generated by the safety brake member 10 and the actuating link mechanism 11. A deviation of the axis and angle is allowed. However, the bending elasticity of the flexible tie rod member 16 is large enough to neutralize the lateral displacement occurring between the safety brake member 10 and the actuating link mechanism 11, and also for example the safety brake member 10. Even if a compressive force is generated due to the pressing upward, it is small enough so that the twisting of the tie rod 14 does not occur.

The advantage of the flexible tie rod member 16 is that it absorbs angular deviations and lateral displacements which inevitably occur during operation of the safety braking member. These deviations and displacements are for example pivotal movements of the tie rod forks 19, lifting of the safety brake member 10 on a chamfer in the safety brake housing 9, while lifting the safety brake member 10, Or incorrect mounting. In the embodiment shown, the deviation and displacement are up to 10 mm. The flexible tie rod member 16 neutralizes this deviation and displacement without causing jamming of each member. Therefore, the actuating link mechanism 11 can be disposed directly above the safety brake device 6, and the assembly cost can be lowered because expensive alignment work is unnecessary. Economical manufacturing is possible, and the safety brake 6 is not changed.

As is apparent from FIGS. 2 and 3, the flexible tie rod member 16 is connected so as not to be separated from the upper tie rod member 15 and the lower tie rod member 17. These members together form a tie rod 14. The flexible tie rod member 16 is advantageously made of steel. Thus, a proven, commercially available and economical product is available.

The flexible tie rod member consists essentially of a cord, so that the best functional properties are obtained. Optimum bending elasticity of the flexible tie rod member 16 is obtained. Alternatively, a single wire or cable with corresponding flexibility and bending elasticity can also be used. The dimension of the flexible tie rod member 16 is selected such that its free length is shorter than the length of the adjacent tie rod members 15, 17. In addition, for the preferred size, the free length of the flexible tie rod member 16 is less than one tenth of its diameter. The flexible tie rod member 16 thus designed requires little structural space. Moreover, the tie rod 14 can transmit the compressive force as required for the operation of any switch member 30 that may be present. The flexible tie rod member is fixedly connected to the upper tie rod member 15 and the lower tie rod member 17. FIG. 3 shows an advantageous embodiment in which the flexible tie rod member 16 is connected by a friction couple pressed together with the upper tie rod member 15 and the lower tie rod member 17. Other connections are possible. For example, the end of the flexible tie rod member can be bent or deformed to achieve a secure mechanical connection. In other embodiments, they are connected by a combination of gluing, soldering or other forms of connection. Due to this possible form of embodiment, it is possible to implement a tie rod 14 which is space-saving, technically established and economical.                     

The lower tie rod member 17 is fixedly connected to the safety brake member 10 (for example, screwed), and the upper tie rod member 15 is the upper blade 22, the associated setting nut 21 And the height adjustment is suspended to the tie rod fork (19) by the fixing nut (20). This allows adjustments to be made with simple aids, so that the safety brake and associated actuating linkages can be fitted in an optimal way in terms of cost. The use of the blade 22 allows the tie rod 14 and the tie rod fork 19 to be wedge-free connected.

If adjustment by the setting nut 21 is not required, in the simplified embodiment the blade 22 is fixedly connected or part of the upper tie rod 15. In such a case, the adjusting nut 21 and the fixing nut 20 may not be necessary. This is a particularly suitable embodiment in terms of cost.

The compensating spring 24 exerts a force on the tie rod 14 and thus directs the safety brake member 10 to its lower position. The compensation spring 24 is adjusted so that the switch 30 is activated when the safety brake member is pressed upward. This solution has several advantages. On the other hand, the safety brake member is held in its lower position. Therefore, malfunction of the safety brake device due to, for example, unevenness or vibration of the moving path is prevented. For example, when the safety brake member 10 hits an obstacle while moving and the safety brake device is operated by an external factor, the switch 30 is operated to stop the elevator installation.

In operation of the actuating link mechanism 11, the safety brake member 10 is lifted such that the safety brake member engages with the guide rail 4 or the corresponding brake part. After reaching this position, the movement of the actuating link mechanism 11 is advantageously limited by defined contacts (not shown). Therefore, the actuation link mechanism 11 can alleviate the reaction force generated by the speed sensing means 7. The compensating springs 24 now enable individual, automatic coupling of the individual safety brake members 10 to the final operating or braking state. Therefore, the load of the actuating link mechanism is reduced, and the optimum design of the entire safety braking system is possible.

Those skilled in the art can modify the installation form and arrangement as desired with the present invention. For example, those skilled in the art can use a safety brake device having one or two safety brake members, or can configure the safety brake member in the form of a roller. The tie rods described can be connected by hooks or forks, for example. Other variations are also possible.

According to the present invention, it is possible to neutralize the lateral displacement occurring during the operation of the safety braking member, to eliminate the disadvantages of the above-described conventional embodiment, and also without the structural change of the existing safety braking member.

Claims (10)

One or more movable bodies (1) arranged to be movable vertically with the guide rail (4), and a pair of safety braking devices (6) are mounted to the one or more movable bodies (1), thereby providing a speed sensing means ( In the operation by 7), the moving body 1 is decelerated, and the actuation force generated by the speed sensing means 7 is transmitted by the actuating link mechanism 11 to the safety braking member 10 of the safety braking device 6. In the elevator installation, the safety brake member 10 and the operating link mechanism 11 is connected by a pull rod 14, The actuating link mechanism 11 and the safety brake 6 are mounted directly below, directly above, or within the height of the movable body 1, and the pull rod 14 is attached to the flexible pull rod member 16. It consists of an upper pull rod member 15 and a lower pull rod member 17 are elastically connected to each other by bending, the central axis of the upper pull rod member 15 and the center axis of the lower pull rod member 17. Lifting arrangements, characterized in that the axial deviation between the upper pull rod member (15) is maintained in a straight line with respect to the lower pull rod member (17) in the unloaded state. 2. The elevator according to claim 1, wherein the flexible pull rod member 16 is made of steel, and / or the flexible pull rod member 16 is made of cord, cable or wire. equipment. 3. Elevator device according to claim 1 or 2, characterized in that the free length of the flexible pull rod member (16) is shorter than the length of the upper pull rod member (15) or the lower pull rod member (17). 3. Elevator device according to claim 1 or 2, characterized in that the free length of the flexible pull rod member (16) is less than one tenth of its diameter. 3. The upper pull rod member 15 and / or lower pull rod member according to claim 1 or 2, wherein the flexible pull rod member 16 is formed by mechanically secure joint, friction joint, adhesion, soldering or a combination thereof. Elevator equipment, characterized in that connected to (17). 3. The pull rod according to claim 1 or 2, wherein the pull rod is connected to the actuating link mechanism (11) by means of a compensating spring (24), wherein the compensating spring (24) is pressed upward by the safety brake member (10). Is arranged and dimensioned so that the switch 30 mounted on the actuating link mechanism 11 is actuated and the compensating spring 24 is maintained in the ready position during normal operation of the safety brake member 10. Elevator equipment, characterized in that. 3. The pull rod according to claim 1 or 2, wherein the pull rod is connected to the actuating link mechanism (11) by means of a compensating spring (24), and beyond the position corresponding to the end position of the actuating link mechanism (11). Elevator equipment, characterized in that when the safety braking member (10) is guided, the compensation spring (24) protects the actuating link mechanism (11) against overload. The method according to claim 1 or 2, characterized in that the normal position of the safety brake member (10) is set and fixed by a setting nut (21) and a fixing nut (20) mounted on the pull rod (14). Elevator equipment. The elevator installation according to claim 1 or 2, wherein the pull rod is suspended from the actuating link mechanism. delete

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