KR19990036394U - Speed detection device of Loflis elevator - Google Patents

Abstract

The present invention relates to a speed detection device for controlling the running speed of the ropeless elevator cage (Ropeless Elevator Cage), the encoder guide rail 13 and the primary armature coil 12 in the lifting passage 10 in the vertical direction It is installed and guides by rubbing the encoder roller 23 of the cage 20 accommodated in the lifting passage 10, and generates a thrust on the secondary permanent magnet 22 to increase the speed by the cage 20 is elevated In the rotary encoder unit, which can be detected, a sensing bar 26 is provided for each floor position of the elevating passage 10, and a position correction sensor for emitting light and receiving light at a predetermined position of the cage 20 ( 25), by calculating and storing the number of output pulses according to whether or not the light of the sensing bar 26 passing through the position correction sensor 25 when the cage 20 ascends and stores the cage (by the output value) 20) speed detection error It is configured to correct the sensing bar 26 and the speed detection error caused by the slip between the encoder guide rail 13 and the encoder roller 23 when the cage 20 travels along the lifting passage 10. Since the absolute position can be corrected from the output value detected by the position correction sensor 25, the accurate speed of the cage 20 can be detected and controlled. Therefore, the error does not accumulate to prevent malfunction of the elevator. The present invention relates to a speed detection device of a low-less elevator, which makes it possible to improve product reliability.

Description

Speed detection device of Loflis elevator

The present invention relates to a speed detection device for controlling the traveling speed of a ropeless elevator cage, in particular, the speed detection caused by the slip between the encoder guide rail and the encoder roller when the cage is traveling along the lifting path The present invention relates to a speed detection device of a low-less elevator which makes it possible to detect and control an accurate speed of the cage by configuring a rotary encoder unit to correct an error.

In recent years, the structure is becoming very high in order to increase the utility of the building, and manpower, etc., has been pointed out as the biggest challenge in designing the internal structure in response to the trend of high building. As a configuration of a transportation system for transportation, technical research on an elevator corresponding to such a transportation system is currently actively conducted.

In order to operate an elevator system suitable for a high-rise building of 1000m or more as described above, it is necessary to overcome the limitations of the existing rope driving method. The elevator currently used mainly adopts the elevating driving method by traction of the rope, so that the design should not only consider the load and vibration characteristics of the cage proportional to the number of floors, but also make it impossible to change the vertical / horizontal direction of the cage. To have.

That is, in the rope-driven elevator, when the lifting stroke is large, the weight ratio of the rope to the total suspension load increases significantly, and when the rope structure is applied to the safety standard design, it is assumed that the rope is In order to maintain 10 times the breaking strength, it is impossible to escape the maximum lifting stroke height of about 700 to 800m, so its practical limitations are exposed.

In addition, the rope-driven elevator can operate only one cage for one lifting passage, so in order to shorten the waiting time of the user in the case of a high-rise building, there is no choice but to increase the elevator. As the area occupied by the elevator space increases, the ratio of the area to the horizontal projection floor area of the entire building exceeds 50%, resulting in an inefficient building structure. New types of elevators that can maximize their performance are inevitably required.

Accordingly, in view of the above conditions, an elevator applicable to a high-rise building can simultaneously operate a plurality of cages within a single hoistway, and the cage can move freely along the hoistway inside the building, and It should be able to function as a comprehensive transportation system that can be used in connection with buildings and underpasses.

Recently, in order to solve the problems of the rope-driven elevator, a lowless elevator driven by a linear motor has been proposed.

As shown in FIG. 1, the conventional lowless elevator is provided with a secondary permanent magnet 122 on an opposite side of the front surface on which the door 127 is formed, and guide rollers 121 at each corner of the front and rear surfaces. And a cage 120 having a rotary encoder 124 and an encoder roller 123 for detecting and controlling the speed of the elevator at one upper portion thereof; Guide rails 111 for guiding the guide rollers 121 of the cage 120 are respectively installed on both inner surfaces in a vertical direction and adjacent to the secondary permanent magnets 122 and the encoder rollers 123. The primary electric coil 112 and the encoder guide rail 113 for guiding the encoder roller 123 of the linear motor for generating a thrust corresponding to the secondary permanent magnet 122 on the side, respectively, in the vertical direction It is composed of a lifting passage (110) installed.

The rotary encoder 124 is rotated by the encoder roller 123 due to the friction between the encoder guide rail 113 and the encoder roller 123 when the cage 120 travels along the lifting passage 110. The speed of the cage 120 can be controlled by detecting the speed of the cage 120 by using the pulse signal of rotation and by calculating the magnetic flux of the synchronous motor.

When the lowless elevator excites a current so that thrust may be generated in the vertical armature coil 112 on the elevating passage 110 in the vertical direction, thrust is generated in the secondary permanent magnet 122 facing the same. As a result, the cage 120 may be elevated in the vertical direction along the guide rail 111.

At this time, the encoder roller 123 of the rotary encoder 124 is moved while frictionally rotating along the encoder guide rail 113, from which a pulse signal is transmitted to the rotary encoder 124 and the number of pulses The speed required for speed control of the cage 120 is calculated by the function relationship with the required time. In addition, the linear motor can be controlled by indirectly calculating the magnetic flux position of the secondary permanent magnet 122 using the pulse signal of the rotary encoder 124.

However, in the rotary encoder unit of the low-less elevator according to the prior art, slippage (slip phenomenon) occurs during rotation due to friction between the encoder guide rail 113 and the encoder roller 123, thereby reducing the speed detection error of the cage 120. In particular, since the error accumulates gradually during long-term operation of the lowless elevator, accurate speed detection and control cannot be achieved, causing the elevator to malfunction.

The present invention has been made to solve the above problems, the rotary encoder unit to correct the speed detection error caused by the sliding between the encoder guide rail and the encoder roller when the cage travels along the lifting path It is an object of the present invention to provide a speed detection device of a low-less elevator which makes it possible to detect and control the correct speed of the cage.

1 is a longitudinal sectional view showing a traveling structure of a lowless elevator according to the prior art;

Figure 2 is a longitudinal cross-sectional view showing a running structure of the lowless elevator according to the present invention,

3 is a plan view illustrating a structure of a rotary encoder unit for speed detection and control of a lowless elevator according to the present invention.

Explanation of symbols on the main parts of the drawings

10; Elevating passage 11; Guide rail

12; Primary armature coil 13; Encoder guide rail

20; Cage 21; As a guide

22; Secondary permanent magnet 23; Encoder roller

24; Rotary encoder 25; Position correction sensor

25a; Light emitting part 25b; Receiver

26; Sensing bar 27; door

The speed detection device of the lowless elevator according to the present invention for achieving the above object is provided by the encoder guide rail and the primary armature coil in the lifting passage in the vertical direction to friction the encoder roller of the cage accommodated in the lifting passage A rotary encoder unit capable of guiding and generating a thrust in the secondary permanent magnet to detect the speed by lifting the cage, wherein a sensing bar is provided for each floor position of the lifting passage, and a predetermined position of the cage is provided. By installing a position correction sensor that emits light and receives light in the cage and calculates and stores the number of output pulses depending on whether light is sensed by the sensing bar passing through the position correction sensor when the cage is moved up and down, It is characterized in that it is configured to correct the detection error.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown in Figures 2 and 3, in the low-less elevator according to the present invention, the secondary permanent magnet 22 is installed on the opposite side of the front of the door 27 is formed, and each corner of the front and rear Guide rollers 21 are attached to each other, and a rotary encoder 24 and an encoder roller 23 for detecting and controlling the speed of an elevator are mounted on one side of the upper side, and a light emitting part 25a and a light receiving part 25b are provided at the upper front end. And a cage 20 to which the position correction sensor 25 having a position is attached; Guide rails 11 for guiding the guide rollers 21 of the cage 20 are respectively installed on both inner surfaces in a vertical direction and adjacent to the secondary permanent magnets 22 and the encoder rollers 23. The primary electric coil 12 and the encoder guide rail 13 for guiding the encoder roller 23 of the linear motor for generating a thrust corresponding to the secondary permanent magnet 22 on the side are respectively vertical directions. Is installed in the, as the lifting passage 10, the sensing bar 26 is fixedly arranged on the upper side of each layer on the position that can pass between the light emitting portion 25a and the light receiving portion 25b of the position correction sensor 25. Consists of.

That is, according to the present invention, each sensing bar 26 is installed at each floor of the elevating passage 10, and the position correction sensor 25 is installed at the predetermined position of the cage 20 to emit and receive light (ultraviolet rays). By calculating and storing the number of output pulses according to whether light of the sensing bar 26 passing through the position correction sensor 25 when the cage 20 moves up and down, the speed of the cage 20 by the output value It is configured to correct the detection error.

Referring to the operation principle of the present invention having the configuration as described above based on the drawings as follows.

When the low-less elevator excites a current so that thrust may be generated in the vertical armature coil 12 on the elevating passage 10 in the vertical direction, thrust is generated in the secondary permanent magnet 22 facing the same. Thus, the cage 20 can be elevated in the vertical direction along the guide rail (11).

At this time, the encoder roller 23 of the rotary encoder 24 is moved while frictionally rotating along the encoder guide rail 13, from which a pulse signal is transmitted to the rotary encoder 24 and the number of the pulse and The speed required for speed control of the cage 20 is calculated based on the function relationship with the required time. In addition, the linear motor can be controlled by indirectly calculating the magnetic flux position of the secondary permanent magnet 22 using the pulse signal of the rotary encoder 24.

On the other hand, since the ultraviolet light is flowing between the light emitting portion 25a and the light receiving portion 25b of the position correction sensor 25 installed on the cage 20, the high output value is normally maintained, but as the cage 20 moves up and down, At the moment when the sensing bar 26 passes through, ultraviolet rays are blocked to maintain a low output value.

Accordingly, when the height measurement of the cage 20 is performed, the number of pulses of the output signal from the light receiving unit 25b of the position correction sensor 25 as the low output value is counted, and the rotary encoder 24 outputs the values between the layers ( Floor floor value), and when the speed control is to be performed during the re-operation of the lowless elevator, the absolute position can be corrected based on the floor floor value. When such a position correction is made, an error between each floor may be minutely generated, but when a plurality of floors or more are traveling, the cumulative error between each floor does not occur, thereby preventing malfunction of the device.

Effects of the present invention that can be expected by the configuration and action as described above are as follows.

The speed detection device of the lowless elevator according to the present invention senses the speed detection error caused by the slip between the encoder guide rail 13 and the encoder roller 23 when the cage 20 travels along the lifting passage 10. Since the absolute position can be corrected from the output value detected by the bar 26 and the position correction sensor 25, the accurate speed of the cage 20 can be detected and controlled, so that the error does not accumulate and the elevator It is possible to prevent malfunction of the product, thereby improving the reliability of the product.

Claims (1)

The encoder guide rail and the primary armature coil are installed in the lifting passage in the vertical direction to guide and guide the encoder rollers of the cage accommodated in the lifting passage and generate thrust on the secondary permanent magnet, thereby increasing the speed by lifting the cage. In the rotary encoder unit capable of detecting, a sensing bar is provided for each floor position of the elevating passage, and a position correction sensor for emitting and receiving light at a predetermined position of the cage is installed, and the position is raised when the cage is elevated. A speed detection device of a lowless elevator, characterized in that the speed detection error of the cage can be corrected based on the output value by calculating and storing the number of output pulses according to whether the sensing bar passes through the correction sensor.