CN1696038A - Safety device for securing the elevator car - Google Patents

Abstract

The safety device is for the arresting of a lift car, whereby the lift car is prevented from impermissible movements and the distance of travel is limited by means of an arresting device allocated to each guide rail of the lift car. The first arresting device (3) interacts with the other arresting device (9), whereby the first arresting device operates the other. A first Bowden cable (10) operates the first arresting device, and the first arresting device operates the second arresting device by means of a second Bowden cable (11).

Description

Safety device for securing the elevator car

technical field

The invention relates to a safety device for securing an elevator car, in which impermissible movements of the elevator car are prevented and the travel path of the elevator car is restricted by means of fastening devices respectively arranged on guide rails of the elevator car.

Background technique

A device for securing an elevator car is disclosed in US5733771. The elevator car running along the guide rails consists of a platform carried by a frame consisting of side parts, upper and lower cross members. A fastening device is arranged on the lower cross member, which serves to prevent an impermissible downward movement of the elevator car. On each end of the lower beam is provided an extendable slide bolt which can be extended within a specific section. When the elevator car descends, the running path of the elevator car is restricted by a sliding bolt, which is located on the plate of the guide rail.

The disadvantage of the known device is that a complex connecting rod is required for the control of the plunger, and that the monitoring of the connecting rod is also difficult.

Contents of the invention

The object of the present invention is to propose a safety device for securing an elevator car in which the disadvantages of known devices are overcome and a reliable limitation of the travel path of the elevator car is achieved.

The technical scheme that realizes the object of the present invention is as follows:

A safety device for securing an elevator car, wherein impermissible movement of the elevator car is prevented and the travel path of the elevator car is restricted by means of fixing devices respectively arranged on guide rails of the elevator car, wherein The first fixing device alternates with the second fixing device, wherein the first fixing device controls the second fixing device.

According to an advantageous refinement of the invention, the first flexible shaft controls the first fastening device and the first fastening device controls the other fastening device with the second flexible shaft.

According to an advantageous refinement of the invention, the first fastening device is monitored by means of another fastening device, wherein a monitoring sensor is arranged on the other fastening device.

According to an advantageous refinement of the invention, the fastening device has an actuator which is controlled by means of a flexible shaft against the spring force of the compression spring.

According to an advantageous refinement of the invention, the actuator is used to limit the travel path of the elevator car to a stop.

According to an advantageous refinement of the invention, the stop has a plate arranged on the guide rail, on which a grooved tube with a grooved opening is arranged.

According to an advantageous refinement of the invention, a damping element is arranged in the slot tube, which is flush with the slot opening and the actuator fits into the recess of the slot opening.

According to an advantageous further design of the present invention, a groove is provided on the actuator, and the groove is detected by a sensor, wherein different positions of the actuator are detected by the actuator.

According to an advantageous refinement of the invention, when the actuator is actuated, the elevator control switches automatically to inspection work or to normal running work, depending on the signal from the sensor.

The advantage of the invention is essentially that the nominal speed of the elevator car is reduced, for example to a check speed, when the fastening device is actuated. For example, mechanical stops arranged on the guide rails that limit the travel path of the elevator car have dampers. The buffer absorbs the corresponding forces when the fastening device of the elevator car moves against the stop. The stop is set, for example, at 4 meters below the shaft top, which is sufficient to ensure sufficient free shaft head space (temporary protection space) for maintenance personnel staying on top of the car when the elevator car travels unexpectedly upwards. The fastening device on the side of the first cage is monitored by the fastening device on the other cage side, wherein the first actuator controls the other actuator, wherein the position of the other actuator is monitored electrically. The sensor monitors the position of the actuator during normal operation and inspection work, wherein impermissible positions of the actuator between normal operation and inspection work can also be monitored.

Description of drawings

The present invention will be further described below with reference to the accompanying drawings. The figure shows:

Fig. 1 shows the lower beam with car support and a fixing device;

Figure 2 shows the lower beam with the car bracket and another fixing device;

Figure 3 shows the alternation of one and the other fixing means;

Figure 3a is a detailed view of the fixture;

Figure 4 shows the release mechanism for controlling the immobilization device;

Figure 4a is a detailed view of the release mechanism;

Figure 5 shows the fixing device when the actuator is in the rest position;

Fig. 6 shows the fixing device when the actuator is in the working position;

Figure 7 shows the actuator in rest position with two for monitoring the actuator position, and

FIG. 8 shows the actuator in the working position with two for monitoring the actuator position.

Detailed ways

FIG. 1 shows a lower cross member 1 with a car frame 2 and a fastening device 3 . The elevator car arranged on the car support 2 is not shown in the figure. A baffle 4 is arranged on the car support 2 , which serves to prevent people on floors from falling into the elevator shaft when the elevator car is blocked at half height and the doors are open. A bracket 5 of the beam 1 is used as a support for the emergency braking device 6 and the guide shoe 7 cooperating with the guide rail not shown in the figure. The fixing device 3 provided on one end of the lower beam 1 cooperates with the stopper 8, which is for example arranged on the guide rail at 4 meters below the top of the shaft and cooperates with the fixing device 3 to limit the upward running path of the elevator car.

FIG. 2 shows the lower cross member 1 with the car support 2 and a further fastening device 9 arranged on the other end of the lower cross member 1 , wherein the two fastening devices 3 , 9 are diagonally opposite each other. The first fastening device 3 is controlled by the first flexible shaft 10 and the second fastening device 9 is controlled by the second flexible shaft 11 . Another fixing device 9 arranged on the other end of the lower beam 1 cooperates with a stop 12, which is for example arranged on the guide rail at 4 meters below the shaft roof and cooperates with the fixing device 9 to lift the elevator car upwards. The operating path is restricted. The position of the fastening device 9 is monitored by means of a first sensor 13 and a second sensor 14 .

Fig. 3 shows the first fastening device 3 and the other fastening device 9 acting alternately, wherein the first flexible shaft 10 controls the first fastening device 3 and the first fastening device 3 utilizes the second flexible shaft 11 to the other fastening device 9 Take control. The first fastening device 3 consists of a housing 3.1, a compression spring 3.2 and an actuator 3.3, the housing 9.1 not being shown in FIG. 3 . The first flexible shaft 10 is connected to the release mechanism 16 shown in FIG. 4 and to the actuator 3.3. The other fastening device 9 consists of a housing 9.1, a compression spring 9.2 and an actuator 9.3, the housing 9.1 not being shown in FIG. 3 . The second flexible shaft 11 is connected with the actuator 3.3 and the actuator 9.3.

FIG. 3 a shows a first flexible shaft 10 , which controls a first fastening device 3 , wherein the first fastening device 3 controls a further fastening device 9 with a second flexible shaft 11 . The actuator 3.3 has a sliding pin 3.31 which is guided in a longitudinal slot 3.11 on the housing 3.1. The string 11.2 of the second flexible shaft 11 is arranged on the sliding bolt 3.31, wherein the sheath 11.1 of the second flexible shaft 11 is supported on the casing 3.1. When the actuator 9.3 is actuated, the string 11.2 is followed, said string simultaneously controlling the actuator 9.3 of the other fastening device 9.

FIG. 4 shows a release mechanism 16 arranged on the car roof frame 15 which controls the first fixing device 3 . The sheath 10.1 of the first flexible shaft 10 is connected to the housing 16.1 of the release mechanism 16. The string 10.2 of the first flexible shaft 10 is articulated on a double-arm reset lever 16.3 rotatable about an axis 16.6, which has a first arm 16.4 and a second arm 16.5, wherein the string 10.2 engages in the first The upper arm 16.4 and the second arm 16.5 act as reset handles. The reset lever 16.3 can be released with the reset button 16.2.

FIG. 4 a is a detailed view of the release mechanism 16 . The reset lever 16.3, which is rotatably arranged on the shaft 16.2, can be latched by means of the slide bolt 16.21 of the release button 16.2, wherein the slide bolt 16.21 engages in the hole 16.31 of the reset lever 16.3. Utilize button 16.22 to overcome spring force when releasing the latch of reset lever 16.3 to make slide bolt 16.21 break away from in hole 16.31. The spring generating the spring force is arranged in the sleeve 16.23. Once the sliding bolt 16.21 disengages from the hole 16.31, the reset lever 16.3 is rotated by the spring force of the flexible shafts 10, 11 and the compression springs 3.2 and 9.2.

FIG. 5 shows the fastening device 9 with its actuator in the rest position, wherein the elevator car is seen in the upward direction with its actuator 3 . 3 in front of the stop 8 or its actuator 9 . 3 in front of the stop 12 . For monitoring the actuator position, the actuator 9.3 has a first groove 9.4 and a second groove 9.5, which, as shown in FIGS. 7 and 8, are used to actuate the sensors 13, 14. The stop 12 is formed by a plate 12.1 arranged on the guide rail and having a grooved tube 12.2. At the lower end of the groove tube 12.2 there is provided a damper 12.5 and a groove mouth 12.3, which has a notch 12.4, wherein the damper 12.5 is flush with the groove mouth 12.3. The actuator 9.3 is guided on the casing 9.1 and on the guide 9.6 of the car frame 2 and is restrained by means of the second flexible shaft 11 against the spring force of the compression spring 9.2.

The stop 8 is formed by a plate 8.1 arranged on the guide rail, which has a grooved tube 8.2. At the lower end of the groove tube 8.2 there is arranged a damping element and a groove nozzle opening 8.3 which has a notch, wherein the damping element is flush with the groove nozzle opening 8.3. The actuator 3.3 is guided on the casing 3.1 and on the guides of the car frame 2 and is held back by the first flexible shaft 10 against the spring force of the compression spring 3.2.

Figure 6 shows the fastening device 9 with the actuator 9.3 in the working position, wherein the elevator car is seen from the upward direction with its actuator 3.3 in front of the stop 8 or its actuator 9.3 in front of the stop 12. As soon as the release mechanism 16 is actuated by means of the release button 16.6, the spring force of the compression spring 9.2 supported on the housing 9.1 and the actuator 9.3 acts. Wherein the spring force moves the actuator 9.3 into the groove mouth 12.3. As the elevator car continues to move upwards, the actuator 9.3 will hit the buffer 12.5, wherein the buffer 12.5 contracts and absorbs the resulting force. The U-shaped notch 12.4 coincides with the third groove 9.7 of the actuator 9.3 which moves along the notch 12.4.

As soon as the release mechanism 16 is actuated by means of the release button 16.6, the spring force of the compression spring 3.2 supported on the housing 3.1 and the actuator 3.3 acts. Wherein the spring force moves the actuator 3.3 into the groove mouth 12.3. As the elevator car continues to move upwards, the actuator 9.3 will hit the buffer 12.5, wherein the buffer 12.5 contracts and absorbs the resulting force. The U-shaped notch 12.4 coincides with the third groove 9.7 of the actuator 9.3 which moves along the notch 12.4.

Figure 7 shows the actuator 9.3 in the rest position and the first sensor 13 and the second sensor 14 for monitoring the position of the actuator. For example, limit value keys are provided as sensors 13 , 14 . The sensors can also work without contact. The first sensor 13 is activated when the actuator 9.3 is in the rest position, the second sensor 14 detects the second groove 9.5 and is therefore not activated when the actuator 9.3 is in the rest position. The elevator control processes the signals of the sensors 13, 14 and releases the normal running speed as the nominal speed of the elevator car.

Figure 8 shows the actuator 9.3 in the working position and the first sensor 13 and the second sensor 14 for monitoring the position of the actuator. The actuator 9.3 is moved by a distance s, for example 50 mm, corresponding to the rest position. For example, limit value keys are provided as sensors 13 , 14 . The sensors can also work without contact. The first sensor 13 is deactivated by means of the first groove 9.4 when the actuator 9.3 is in the working position. The second sensor 14 is activated when the actuator 9.3 is in the working position. The elevator control processes the signals of the sensors 13 , 14 and releases the speed for checking as the setpoint speed of the elevator car.

By the action of the reset lever 16.3 to the initial position, the reset of the actuator 9.3 to the rest position is realized, wherein the string 10.2 of the first flexible shaft 10 and the string of the second flexible shaft 11 move the actuator 3.3 out of the slot nozzle or Move the actuator 9.3 out of the slot nozzle 12.3.

When the actuator 9.3 is stuck in an impermissible intermediate position, the two sensors 13, 14 are activated. The elevator control processes the signals of the sensors 13, 14 and completely blocks the operation of the elevator car.

In the device of the present invention, the changeover switch that is usually arranged on the top of the elevator car is omitted. Along with the action of actuator 3.3,9.3, according to the signal elevator control device of sensor 13,14, switch to inspection operation automatically or switch to normal running work automatically.

Claims (9)

1. one kind is used for safety device that lift car is fixed, that utilizes wherein that the anchor fitting (3,9) be separately positioned on the car guide rail prevents lift car unallowedly moves and the operating path of lift car is limited, it is characterized in that, first anchor fitting (3) and second anchor fitting (9) alternating action, wherein first anchor fitting (3) is controlled second anchor fitting (9).

2. according to the described safety device of claim 1, it is characterized in that first flexible axle (10) is controlled with first anchor fitting first anchor fitting (3) and utilized second flexible axle (11) that another anchor fitting (9) is controlled.

3. according to claim 1 or 2 described safety devices, it is characterized in that, utilize another anchor fitting (9) that first anchor fitting (3) is monitored, wherein be provided with the sensor (13,14) that monitors at another anchor fitting (9).

4. each described safety device in requiring according to aforesaid right is characterized in that, described anchor fitting (3,9) has the actuator (3.3,9.3) that a spring force that overcomes compression spring (3.2,9.2) utilizes flexible axle (10,11) to control.

5. according to the described safety device of claim 4, it is characterized in that described actuator (3.3,9.3) is used for the operating path of lift car is limited in backstop (8,12).

6. according to the described safety device of claim 5, it is characterized in that backstop (8,12) has a plate (12.1) that is arranged on the guide rail, described plate (12.1) is provided with a barrel (8.2,12.2) with barrel mouth (12.3).

7. according to the described safety device of claim 6, it is characterized in that, in barrel (8.2,12.2), be provided with a damper element (12.5), described damper element flush with barrel mouth (12.3) and the breach (12.4) of actuator (3.3,9.3) and barrel mouth (12.3) adaptive.

8. each described safety device in requiring according to aforesaid right, it is characterized in that, actuator (9.3) is provided with groove (9.4,9.5), utilize sensor (13,14) that described groove (9.4,9.5) is detected, wherein utilize actuator (13,14) that the different position of actuator (9.3) is detected.

9. according to the described safety device of claim 8, it is characterized in that elevator control automatically is transformed into the inspection operation or automatically is transformed into normal operation work according to the signal of sensor (13,14) when actuator (9.3) moves.

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