Patent Publication Number: US-10781074-B2

Title: Elevator car movement monitoring device, assembly device and assembly method for an elevator system

Description:
FIELD 
     The invention relates to a monitoring device for an elevator system, to an assembly device for assembling a shaft retrofit, and to a method for monitoring an assembly platform. 
     BACKGROUND 
     Elevator systems are installed in a building. The elevator system essentially comprises an elevator car that is connected via support means to a counterweight or to a second elevator car. The elevator car is caused to travel along essentially vertical guide rails, and the counterweight is caused to travel in the opposite direction, by means of a drive that may be selected to act on the support means or directly on the elevator car or counterweight. The elevator system is used to convey people and goods within the building to individual floors or a plurality of floors. The elevator system includes devices to secure the elevator car if the drive or support means fails. To this end, as a rule, brake devices or catching devices are used that can brake the elevator car on the guide rails, if needed. Such elevator systems are assembled in the building. This means that shaft material must be installed in a travel shaft. Assembly platforms are often used for this purpose. Such systems are known. 
     WO 98/40305 describes such an assembly process. In it, the pre-assembled elevator car or parts thereof are used as the assembly platform. A speed-limiting device is used for monitoring the assembly platform. The assembly platform includes catching devices that are actuated by the speed-limiting device when needed. 
     WO 2014/040861 shows a brake device for securing an elevator car during installation trips. A brake device of the assembly platform is selectively actuated or released. 
     In the aforesaid systems, an actuating element assembled in the shaft or a temporary speed-limiting device is required. This is expensive and sometimes difficult to install, since upper regions of the shaft must be accessible. 
     SUMMARY 
     The purpose of the invention is to provide a monitoring device that is simple to use, safe to employ, and that may possibly be reusable. 
     The solutions described in the following make it possible to satisfy these requirements in an optimal manner, at least individually. 
     An assembly platform that is used for assembling shaft material of an elevator system is provided with electromechanically actuatable catching devices. Furthermore provided on the assembly platform is a monitoring device. The monitoring device is provided for use in the future elevator system and is designed to monitor movements of an elevator car of the future elevator system. The assembly platform is thus used for creating the future elevator system. The monitoring device is designed for monitoring movements of the assembly platform during the assembly period and for monitoring the movements of the elevator car after said assembly has been completed. To this end, the monitoring device includes at least one sensor system for detecting a movement variable of the elevator car and an analysis device that is designed to evaluate the detected movement variable and compare it to a threshold or to a set of thresholds. If the threshold is exceeded, or if at least one of the thresholds is exceeded, a signal output is triggered and the catching device or a corresponding brake is actuated by means of this signal output. Thus the safety elements required for operating the elevator system may be used during installation of the elevator system. This is particularly advantageous when a car floor of the future elevator car, for instance, is used for the assembly platform. 
     In one solution variant, the monitoring device now comprises a checking routine for determining a state of the monitoring device and the monitoring device selects the threshold from specified thresholds as a function of this state. State of the monitoring device shall be construed to mean an overall state of the monitoring device in a system. This means, for example, that the monitoring device is not connected to necessary systems that are required for the final operation of the monitoring device in the elevator system. Thus allowance is made for the fact that not all elements of the elevator are present when it is assembled. For instance, elevator doors are missing, as are shaft information unit and control signals. Likewise, there is often no power connector, or only a temporary power connector. Since the monitoring device itself determines the status or state of the elevator system or monitoring device, it may place itself into a safe assembly operation mode or maintain such as long as necessary elements of the elevator are absent. 
     In one embodiment, the specified thresholds comprise at least one assembly threshold and one normal operation threshold. In addition, one state of the monitoring device is an assembly state. The checking routine indicates the assembly state as long as specified connection elements to the monitoring device are absent. The monitoring device selects the assembly threshold from the specified thresholds for as long as the checking routine indicates the assembly state. As long as the checking routine indicates the assembly state, the analysis device compares the evaluated movement variable to the assembly threshold in order to trigger the signal output and actuate the brake or catching device if the assembly threshold is exceeded. Thus there is a minimum safeguard for the assembly platform from the very beginning and an assembly team can operate the assembly platform safely. At least one assembly threshold and one normal operation threshold includes that one set of assembly thresholds or normal operation thresholds may be present. The values determined in the set may be adjusted to different assembly and normal operation phases or they may be adjusted to different movement behaviors such as a jolt, acceleration, travel segment, or even a travel time. 
     In one embodiment, in the assembly state the monitoring device further includes a reset function that resets the signal output and permits the actuated brake or catching device to be reset, wherein the reset function may be initiated manually, or may be initiated automatically if the analysis device determines an upward movement of the elevator car or if there is a drop below the assembly threshold during a specified period. Thus these may be reset in a simple manner after the assembly platform has been secured. Thus the monitoring device actuates the catching device after an unexpected downward jolt, for example. The catching device blocks further downward movement. The catching device is normally embodied self-locking. This means that the catching device must be unlocked, for instance using an upward movement, before it may be disengaged. Thus, the monitoring device may reset itself as soon as it determines that the assembly platform is at rest or that the catching devices were actuated. Thus the entire safety device may only be returned to the operation state by an upward movement. 
     In one embodiment, in the assembly state the monitoring device includes a dead man&#39;s switch so that if the dead man&#39;s switch is not actuated the signal output is triggered and the brake or catching device is actuated. Thus optimum assembly safety may be attained. A person skilled in the art of assembly may load material by means of the assembly platform and move said material to an assembly site. During the loading or even during the assembly of material, the dead man&#39;s control is deactuated. This means that the monitoring device initiates the brake or the catching device, that is, brings it to a braking state. The assembly platform is thus fixed to guide rails. This facilitates work from the assembly platform. A pedal or a switch must be actuated continuously in order to initiate the brake or catching device or to actuate the dead man&#39;s switch. The person skilled in the art of assembly carries this out actively as soon as he wants to deliberately cause the assembly platform to travel. As soon as he releases the pedal or switch, the dead man&#39;s switch is deactuated and the monitoring device initiates the brake or catching device. The pedal or the switch is preferably embodied such that the pedal or the switch is not actuated inadvertently. 
     A temporary connecting unit that supplies the monitoring device with electrical energy when it is in the assembly state is preferably provided. To this end, in one embodiment the connecting unit includes a power supply unit for connecting to a customary local electrical power network. Thus the customary local conditions for a construction or assembly site are met. The connecting unit includes, for example, a buffer that can bridge brief power outages. 
     Alternatively, the connecting unit includes an energy module having at least one electrical energy storage unit. The energy storage unit is designed to operate the monitoring device together with the associated brake or catching device. The energy storage unit is preferably exchangeable when needed. Thus the monitoring device may be operated essentially off-grid. In one variant, energy storage units are used as they are used for battery-operated tools, such as for instance a battery-operated screwdriver. These are easy to charge and can be exchanged rapidly. 
     The energy module or the electrical energy storage unit is preferably provided with a charging control element that indicates an insufficient charge reserve. When there has been a drop below a specified charge reserve, this monitoring device advantageously actuates the brake or catching device. Thus the assembly technician has a good over-view and can exchange or recharge the energy storage unit promptly. 
     In one embodiment, the connecting unit or the energy module has a buffer that maintains an energy supply for the monitoring device while the electrical energy storage unit is being exchanged. Thus periods of interruption may be kept brief. 
     In one embodiment, the connecting unit includes display elements for displaying an operation state of the monitoring device or even for displaying a travel velocity. However, this requires an additional connection to the monitoring device, which connection may be realized, for instance, via a communications connector. 
     In one embodiment, for detecting the movement variable, the sensor system includes at least two redundantly working accelerometers that detect an acceleration of the elevator car. The assembly threshold indicates a threshold acceleration and the signal output is triggered for actuating the brake or the catching device if the detected acceleration exceeds the indicated threshold acceleration during a specified period of time. Alternatively, the assembly threshold indicates a permissible assembly velocity and the signal output is triggered for actuating the brake or the catching device if a velocity determined from the detected accelerations exceeds the indicated permissible assembly velocity. Accelerometers are particularly well suited because they work independent of the environment. They do not need any external interface. They may be constructed as integral components of the monitoring device. The monitoring device may preferably be attached to the assembly platform in the manufacturing plant. 
     In one embodiment, the assembly threshold determines a travel velocity of preferably about 0.3 m/s (meters per second), but a maximum of 0.5 m/s. Alternatively or in addition, the assembly threshold determines, for instance as an additional assembly threshold, a limit acceleration of a maximum of gravitational acceleration, corresponding to 9.81 m/s2 (meters per second squared). The assembly threshold is preferably set as a maximum of 6.0 m/s2, however. In addition, the assembly threshold may also provide a temporally weighted trigger, for instance. If a specified acceleration of, for example, 6.0 m/s is exceeded only briefly, for instance during less than 50 ms, no triggering occurs. As soon as this acceleration is registered for longer than a specified period of, for example, 50 ms, the signal output is triggered to actuate the brake or catching device. The threshold is set such that it preferably takes into account a characteristic of means of movement that are used for moving the assembly platform. Typical means of movement are a cable device, a chain hoist, or other lifting means. According to safety regulations, the maximum velocity during assembly trips is 0.5 m/s, or the monitoring device must actuate the brake or catching device at a velocity of 0.5 m/s. At an assembly threshold of 0.3 m/s, there is enough of a safety interval to this velocity permitted by the safety regulations. The safety regulations may vary by country. Consequently the thresholds to be monitored may be defined differently. 
     Alternatively or in addition, the assembly threshold includes a temporally weighted travel velocity. This includes, for instance, that when a travel velocity of 0.2 m/s is exceeded over a prolonged period—which can mean, for instance, that the assembly platform is moving downward too rapidly due to overloading—the signal output for actuating the brake or catching device is triggered. 
     In one alternative embodiment, or preferably in an additional embodiment, another state of the monitoring device indicates a normal state and the checking routine indicates the normal state as soon as specified connection elements are attached to the monitoring device or are in stand-by mode. Consequently, the monitoring device selects the normal operating threshold from the specified thresholds as soon as the checking routine indicates the normal state, and the analysis device compares the evaluated movement variable to the normal operation threshold in order to trigger the signal output and actuate the brake or catching device if the normal operation threshold is exceeded. Thus the monitoring device may be seamlessly moved into a normal operation mode that permits normal operation of the monitoring device. Normally this step occurs if the assembly platform is constructed with car components, such as car body, walls, car doors, roof, and required control elements, and the elevator system is provided with drive means, support cables, and elevator control unit. Starting at the point in time of the normal state, the monitoring device does not release operation of the elevator system unless the attached elements indicate a state that is plausible to the sensor system of the monitoring device. 
     However, switching from the assembly state to normal state is linked to additional conditions. Thus, for instance, electronic confirmation of a decrease in quality of the car may be required. 
     In one embodiment, in the normal state the analysis device evaluates the detected movement variables, taking into account the specified connection elements. In one embodiment, the specified connection elements include at least one speed sensor, in particular a tachometer, for detecting a travel velocity, or a path sensor, for detecting traveled units of a path, or a position determination system. As a rule, in addition to accelerometers, at least one additional movement signal is used for reliably monitoring the elevator movements in normal operation. This additional movement signal is used for mutual plausibility control and for more precise evaluation of the movement process. Accelerometer and path sensor, in the form of an incremental coder, for instance, are driven by deflection rollers or guide rollers. Thus, in the normal state, the analysis device uses algorithms that calculate all detected movement variables together in order to reach a so-called verified or reliable movement variable. As a rule, these devices are not yet present in the assembly phase of the elevator system, and the corresponding locations in the monitoring device are not occupied. Therefore the absence of this device or these devices may be used as an indication that the elevator system has not yet been completely assembled and that it may therefore be operated only in the assembly mode. In the assembly state, therefore, the analysis device may in any case use other algorithms that are defined, taking into account the movement variables available in the assembly state. Thus specific assembly-related movement variables may be monitored. This results in a reliable solution, since in the assembly state operation is necessarily only possible at the slowest travel speeds, as long as the additional movement signal or other relevant connection element are lacking. 
     In an additional or alternative embodiment, the specified connection elements include a connector to an elevator control unit, safety circuit, or power supply. During normal operation, status information is frequently exchanged between elevator control unit and monitoring device. This may be maintenance information, operating information, etc. Such status information may be exchanged, for instance, via a bus connection such as a CAN bus. On the other hand, as a rule the monitoring device is incorporated into a safety circuit of the elevator system. The monitoring device opens this safety circuit, for instance, when the monitoring device determines that there is an uncontrolled travel movement of the elevator car or, naturally, if the catching device is actuated. An interruption in the safety circuit causes an elevator drive to shut down. In normal operation, as a rule power is supplied by a central power supply of the elevator system. The absence of one or more of these connection elements may be used as an indication that the elevator system has not yet been completely assembled and that it may therefore be operated only in the assembly mode. 
     For instance, the monitoring device may detect an absence of a connection element in that a detection signal of the connection element is absent, in that a reference resistance is absent, in that contacts are bridged by assembly plugs or a bridge head, in that, for instance, a mass signal is missing, in that a reflection signal of a code reader is absent, in that a query of the monitoring device via the bus connection is not answered or is incorrectly answered, in that a switch that is actuated by a connection element is not actuated, or in that other characteristic values of a connection element to be connected are absent. 
     In one embodiment, during manufacture plug-in positions may be provided with bridge heads that in the monitoring device a simple detection of the status of the monitoring device. 
     A method for assembling an elevator system preferably provides that a movable assembly platform is assembled in the elevator shaft for assembly purposes. This preferably occurs as soon as the lower-most guide rails are installed in the elevator shaft. The assembly platform may include parts of the future car floor, but it may also be a special work platform. A monitoring device and at least one brake or one catching device are attached to or on the assembly platform and electrically connected to one another. In any case, the monitoring device and the brake or catching device may be attached to the assembly platform even before the latter has been assembled. This especially makes sense when the future car floor is used as the assembly platform. The monitoring device is connected to an energy supply that, as a rule, is temporary. The monitoring device detects, essentially automatically, that important connection elements, such as an elevator control unit, a safety circuit, or in any case additional motion sensors, are absent or not connected. The monitoring device is in an assembly state and in this state permits only small or slow movements for as long as such connection elements are absent. Thus assembly tasks can be performed safely. 
     In an additional stage, a dead man&#39;s switch is also added on the assembly platform and connected to the monitoring device. Thus the assembly platform is always secured by means of the brake or catching device if there is no deliberate actuation of the dead man&#39;s switch. 
     Furthermore, the monitoring device automatically switches to a normal state as soon as essential connection elements, or connection elements deemed important, are connected. This permits a simple and safe transition to the normal operation phase. In particular, the same components that were already used for securing the assembly state are also used for operating the elevator system. This is particularly advantageous when, as stated in the foregoing, the car floor is equipped with the required components at the manufacturing site. 
     The invention shall be described using exemplary embodiments in conjunction with the schematic figures. 
    
    
     
       DESCRIPTION OF THE DRAWINGS 
       The following is shown: 
         FIG. 1  illustrates an assembly device with built-on monitoring device; 
         FIG. 2  illustrates a monitoring device in an assembly state; 
         FIG. 3  illustrates an elevator system with built-on monitoring device; 
         FIG. 4  illustrates the monitoring device in a normal state; 
         FIG. 5  illustrates a connecting unit with integrated dead man&#39;s switch. 
     
    
    
     In the figures, the same reference numbers are used for equivalent parts in all of the figures. 
     DETAILED DESCRIPTION 
     An elevator system  1 , as illustrated schematically in  FIG. 3  in the assembled state, includes an elevator car  4  that is embodied for transporting people or goods. The elevator car essentially comprises a car floor  12   a  and a car structure  5  having walls, doors, ceiling, and other devices required for operating the elevator car. The elevator car  4  is guided along guide rails  10 ,  11  and, in the exemplary embodiment, it is borne by a support means  16  via support rollers  6 . The support means  16  are connected to a drive  2  that can move the elevator car accordingly. The drive  2  may be controlled or regulated by means of an elevator control unit  3 . The elevator car  4  has a position determination system  30 . The elevator control unit  3  uses the position and movement information from the position determination system  30  for controlling the drive. In the example in  FIG. 3 , the position determination system  30  comprises a coded belt  30   a  that is installed along a travel path of the elevator car  4  and a code reader  30   b , arranged on the elevator car  4 , that can read the code of the belt  30   a  and transform it into path units or position data. 
     The elevator car  4  furthermore comprises a brake or a catching device  7  that may, if needed, be caused to engage with the guide rails  10 ,  11  in order to brake and retain the elevator car. To this end, two brakes or catching devices  7  are used that can cooperate with the guide rails  10 ,  11  arranged on both sides of the elevator car  4 . The brakes or catching devices  7  are controlled or regulated by a monitoring device  22 . The monitoring device  22  has a sensor system  23  for determining movement variables  42  (see  FIG. 2 ) of the elevator car  4 . Data from the position determination system  30 , but also internal sensors, may be used to this end. For safety reasons it is desired that different sensors acquire the movement data so that reliable data may be generated. The monitoring device  22  is naturally connected to the brakes or catching devices  7  in order to actuate them, that is, to brake the elevator car, or to release them. The monitoring device  22  is furthermore connected to a power source  33  and as a rule it is connected to the elevator control unit  3  by means of a communications interface  31 , such as a CAN bus. In addition, as a rule the monitoring device is incorporated into a safety circuit  32 . As a rule, when the brakes or catching devices  7  are actuated, the safety circuit of the elevator system is controlled such that the drive of the elevator system is stopped. 
     During the construction of the elevator system, during an assembly process many sub-groups of the elevator system  1  are constructed and installed in an elevator shaft  17  in a specified sequence. An assembly device  8  including an assembly platform  12 , as illustrated in  FIG. 1 , is often used for this purpose. First guide rails  10  are installed in the region of the lower end of the elevator shaft for this purpose. The assembly platform  12  is installed in these first guide rails  10 . The assembly platform  12  may be raised or lowered by a traction means  13  that is installed or attached in an upper region of the elevator shaft  17 . The assembly platform  12  is guided by means of the first guide rails  10 . Now additional guide rails  11  may be raised by means of the assembly platform  12  and may be installed in a working manner from the assembly platform  12  so that the travel shaft  17  may be equipped starting from the bottom and working upward. As may be seen from  FIG. 1 , the future car floor  12   a  or parts of the elevator car  4  are frequently used as the assembly platform  12 . In any case, components, such as the future support rollers  6 , may be preassembled on the assembly platform  12 . Likewise, the brakes or catching devices  7  are built onto the assembly platform  12  and, in cooperation with the guide rails  10 ,  11 , they act as locking brakes for securing the assembly platform. 
     The monitoring device  22  is also built onto the assembly platform  12 . The monitoring device  22  is provided for use in the future elevator system  1  and is consequently designed to monitor movements of an elevator car  4  of the future elevator system  1 . The monitoring device  22  is designed such that it can monitor the movements of the assembly platform  12  during the assembly period and can also monitor the movements of the elevator car  4  after said assembly has been completed. As may be seen in  FIG. 1 , during the assembly, the elevator control unit  3  is naturally absent or there is no proper power supply. As a rule, there is also no safety circuit and the coded belt for the position determination system  30  is also absent. Corresponding connection sites  27  on the monitoring device  22  are thus not occupied and, instead of a proper power supply, according to the exemplary embodiment in  FIG. 1 , a connecting unit  14  is provided that supplies the monitoring device  22  and the associated brakes or catching devices  7  with required energy, preferably electrical energy. 
     The monitoring device  22  now detects that relevant connection elements  27  are absent. For instance, the monitoring device detects this in that a detection signal of the connection element is absent, in that a reference resistance is absent, in that contacts are bridged by assembly plugs, in that, for instance, a mass signal is missing, in that a reflection signal of a code reader is absent, in that a switch that is actuated by a connection element is not actuated, or in that other characteristic values of a connection element to be connected are absent. These are examples that may be set up or even added by the person skilled in the art. In another example, the absence of the connection to the elevator control unit  3  may be detected in that a query of the monitoring device  22  via the bus connection or the corresponding communications interface  31  does not receive a reply or receives an incorrect reply. As long as these connection elements, or at least a selection of specified connection elements, are absent, the monitoring device  22  remains in an assembly state  49 , which shall now be explained in connection with  FIG. 2 . 
     The monitoring device  22  includes the sensor system  23  for detecting a movement variable of the elevator car. In the embodiment according to  FIG. 2 , this comprises two redundantly working accelerometers  43 ,  43   a . The two accelerometers  43 ,  43   a  determine movement variables  42 , in the form of accelerations, of the assembly platform  12 . The two accelerometers  43 ,  43   a  are components of the monitoring device  22 . The monitoring device  22  is connected via signal outputs  26  to the brakes or catching devices  7 . Furthermore, there is an at least temporary energy supply  15  by means of the connecting unit  14 . The other connection elements  27  are absent, in particular the connection to the elevator control unit  3 , the connection of the safety circuit  32 , and, in the present case, also the connection of an external sensor for detecting the movement of the elevator car, such as for instance a velocity sensor  28 , a path sensor  29 , or the coded belt  30   a  of the position determination system  30 . A checking routine  25  arranged in the monitoring device  22  detects the absence of individual or of all of these connection elements  27  and puts the monitoring device  22 , or an analysis device  24  of the monitoring device  22 , in the assembly state  49  or leaves the monitoring device  22  in the assembly state. This means that an evaluation algorithm that relates to the evaluation of the two accelerometers  43 ,  43   a  is specified to the analysis device  24 . At least one threshold  51  that limits the movement parameters of the assembly platform  12  is established for an assembly threshold  50 . Often a set of thresholds is used instead of an individual threshold  51 , as is explained in the general section. Thus when a threshold  51  is discussed in the following, this shall be construed to include a set of thresholds. The corresponding evaluation algorithm, as well as the corresponding assembly threshold  50 , is stored in a parameter set  54  that is associated with the assembly status  49 . The parameter set  54  thus comprises specified thresholds  52  that are associated with the corresponding state. The assembly threshold(s)  50  comprise permissible travel velocities and they comprise permissible accelerations, as well as possible time ranges during which specific acceleration values or travel velocities must not be exceeded. The assembly thresholds  50  are tailored to the assembly requirements, as was also explained in the general section of the description. In the assembly state  49 , therefore, the monitoring device  22  takes on the threshold(s)  51  from the specified thresholds  52  of the corresponding parameter set  54 . 
     The analysis device  24  compares the movement variables  42  determined from the signals of the two accelerometers  43 ,  43   a , in particular a movement velocity and a current acceleration state, to the assembly thresholds  50 . As soon as the corresponding assembly thresholds have been exceeded, the signal output  26  or signal outputs  26  are triggered and the brakes or catching devices  7  are actuated. It should be noted that the brakes or catching devices  7  as a rule are designed such that they are kept open when supplied with current and that they are actuated, that is, they close, if no current is being fed. Triggering the signal output  26  thus means that the signal output is switched without power. 
     In addition, provided on the assembly platform  12  is the connecting unit  14  that supplies the monitoring device  22  and the associated brakes or catching devices  7  with required energy. Such a connecting unit  14  is explained in greater detail in  FIG. 5 . 
     The connecting unit  14  includes an energy module  14   a  in the form of a rechargeable electrical energy storage unit  14   b . The energy storage unit  14   b  is designed to operate the monitoring device  22  together with the associated brake or catching device  7 . The energy storage unit  14   b  is exchangeable when needed. The energy storage unit  14   b  may be a battery. The battery may be charged in an appropriate charging device. Naturally a connection to an on-site power supply is also possible. 
     The connecting unit  14  is provided with a charging control element  14   d  in the embodiment in  FIG. 5 . Thus a charge reserve may be evaluated. At the same time, the brake or catching device may be actuated when there has been a drop below a specified charge reserve. Moreover, the connecting unit  14  has an optional buffer  14   c  that maintains an energy supply for the monitoring device while the electrical energy storage unit is being exchanged. The connecting unit  14  illustrated in  FIG. 5  furthermore includes optional display element  46  for displaying an operation state of the monitoring device. A display of an instantaneous travel velocity may also be displayed at times. In any case, a connector of the communications connector  31  of the monitoring device  22  is used for this. 
     As a special feature, according to  FIG. 5  the connecting unit  14  comprises a so-called dead man&#39;s switch  44 . This dead man&#39;s switch  44  causes the brake or catching device  7  to be actuated if the dead man&#39;s switch is not actuated. To this end, a pedal  45  is arranged on the connecting device  14 . A person involved in the assembly operates the pedal  45  with his foot. If the pedal  45  is not being depressed, the monitoring device  22  actuates the brake or catching device  7 . Thus the assembly platform  12  is normally held by the brake or catching device  7  if it is not deliberately in the travel mode. This means that it is still for assembly tasks and does not move. If the assembly platform  12  is moved, the person performing the assembly is deliberately depressing the pedal, so that the monitoring device  22  opens the brake or catching device  7 . The assembly platform may then be moved by operating the traction means  13  or an associated lift device. 
     If the travel shaft  17  is now assembled in the manner illustrated, the elevator car is also complete as illustrated in  FIG. 3 . This means that the car structure  5  is built onto the assembly platform  12 , which consequently becomes the car floor  12   a . With this completion, the missing connection elements  27 , in particular the connector to the elevator control unit  3 , the connector for the safety circuit  32 , and, in the present case, the position determination system  30 , as well, are connected to the monitoring device  22 . Likewise, the temporary connecting unit  14  is removed and the monitoring device  22  is connected via the connector  33  to the proper power supply for the elevator system. 
     The checking routine  25  arranged in the monitoring device  22  now detects that the required connection elements  27  are connected and puts the monitoring device  22 , or the analysis device  24  of the monitoring device  22 , in a normal state  47 . This means that an evaluation algorithm or computer algorithm that relates to the evaluation of the two accelerometers  43 ,  43   a  and the attached position determination system  30  is specified to the analysis device  24  and that the threshold  51  or the set of thresholds that limit the movement parameters of the elevator car  4  are established corresponding to normal operation thresholds  48 . The corresponding evaluation algorithm, as well as the corresponding specified thresholds  52  or the corresponding normal operation thresholds  48  are stored in the parameter set  54  that is associated with the normal state  47 . The normal operation thresholds  48  comprise maximum permissible travel velocities, always taking into account a position of the elevator car  4  in the travel shaft  17 , and they comprise permissible accelerations, as well as possible time ranges during which specific acceleration values or movement variables must not be exceeded. A plurality of normal states  47  may be stored in the parameter set  54  and may then be selected, for instance, for a service or maintenance trip or even for trips in the event of fire or the like. 
     The embodiment illustrated may be modified. For instance, instead of the illustrated position determination system  30 , other sensors may be used for detecting movement variables. Thus, for instance, an incremental coder may be used that is driven, for instance, by a support roller, a velocity sensor may be used that is driven, for instance, by a guide roller, or a sound-based device for detecting travel movements may also be used, of course. Other evaluation routines are used appropriately in the assembly state  49  depending on connection elements  27  and sensors used. 
     The connecting device  14  illustrated may also be modified. For instance, the dead man&#39;s switch may be realized separately, apart from the connecting device. 
     The various connectors for connecting connection elements  27  do not have to be separate connecting positions. Connecting strips with connection sites, optical interfaces, or even wireless connection sites may be used. 
     In accordance with the provisions of the patent statutes, the present invention has been described in what is considered to represent its preferred embodiment. However, it should be noted that the invention can be practiced otherwise than as specifically illustrated and described without departing from its spirit or scope.