JP2018070292A - Elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect a position of a car 2 of an elevator, a photoelectric sensor 23 is provided on the car 2, and plates P1 to P6 opposed to the photoelectric sensor 23 are provided at upper and lower portions of a hoistway 1. To reduce the number of. A governor is provided with an encoder. Further, the lengths of the respective plates P1 to P6 are set to different lengths in the vertical direction. Then, the position of the car 2 is specified by the encoder 22 and the photoelectric sensor 23 by detecting the length of the plate facing the photoelectric sensor 23 in the vertical direction. [Selection diagram] Fig. 1

Description

  The present invention relates to an apparatus for detecting the position of an elevator car traveling in a hoistway, and more particularly to an apparatus for detecting the position of a car at the upper and lower ends of the hoistway, for example, an ETS (Terminal Floor Forced Deceleration Device).

As a means for detecting the position of the elevator car traveling in the hoistway, there is a configuration in which a number of position sensors are arranged in the hoistway and a cam for operating the position sensor is installed in the car. This technique detects the position of the car by turning the position sensor on and off each time the car passes through the position where the position sensor is installed.
However, this apparatus increases the number of position sensors and increases the number of position sensor wiring cables.

  Therefore, as a means for solving this problem, a photoelectric sensor is provided in the cage, and a shield plate (plate) that blocks the optical axis of the photoelectric sensor is arranged in the hoistway (for example, see Patent Document 1). Yes.

  This apparatus will be described with reference to the drawings. 3 is a diagram showing the arrangement of the plates in the hoistway, FIG. 4 is a diagram showing the main part of the car ceiling, FIG. 5 is a detailed explanatory diagram of the plates, and FIG. 6 is an explanatory diagram of the positional relationship of each plate.

In the figure, 1 is a hoistway in which the car 2 moves up and down, A1 to A6 are A phase plates arranged in the hoistway 1, similarly B1 to B6 are B phase plates, and Z1 to Z6 are Z phase plates.
4 is a photoelectric sensor installed in the upper part of the car 2, the photoelectric sensor 4a for the A phase plates A1 to A6, the photoelectric sensor 4b for the B phase plates B1 to B6, and the photoelectric sensor 4z for the Z phase plates Z1 to Z6. It has. Reference numeral 5 denotes a pair of guide rails for guiding the raising and lowering of the car 2.

  As shown in FIG. 5, a gap portion G is opened in the A-phase and B-phase plates, and the upper and lower portions are shielding portions S that are plate bodies. The shielding portion S blocks the optical axis of the photoelectric sensor 4, and the gap portion G can pass the optical axis of the photoelectric sensor 4, and both are alternately arranged in the vertical direction, and the length of the shielding portion S and the gap portion G is The length L is the same.

As shown in FIG. 3, on the upper part of the hoistway 1, in order from the top, three plates A1 with a gap G, two plates A2 with a gap G, and a plate A3 with one gap G are arranged. Has been.
On the other hand, in the lower part of the hoistway 1, in order from the top, two plates A4 with a gap G, three plates A5 with a gap G, and four plates A6 with a gap G are arranged. As described above, the closer to the upper and lower ends of the hoistway 1, the larger the number of the gaps G is arranged, and the lower plate has one more gap than the upper part.

  The B-phase plates B1 to B6 are also configured and arranged in the same manner as the A-phase plates A1 to A6. However, in the upper part of the hoistway 1, the hoistway is arranged lower by L / 2 than the A-phase plate. In the lower part of 1, it is arranged 3 L / 2 higher than the A-phase plate.

The Z-phase plates Z1 to Z6 are plates having no gaps, and are longer than the corresponding A-phase and B-phase plates. , Extends downward from the B-phase plate.
When the photoelectric sensor 4 detects the upper end or the lower end (edge) of the shielding portion S, it generates a pulse signal, and performs car position detection based on this pulse signal.

  Further, the hoistway 1 is divided into a number of sections with reference to the upper and lower ends of the Z-phase plates Z1 to Z6.

  As shown in FIG. 3, section 1 extends from the upper end of the plate Z1 to the upper end of the hoistway 1, section 2 extends from the upper end of the plate Z1 to the upper end of the plate Z2, and so on. Section 7 is set up to the lower end. Further, the section 11 extends from the lower end of the plate Z1 to the upper end of the hoistway 1, the section 12 extends from the lower end of the plate Z1 to the lower end of the plate Z2, and the section 17 extends from the lower end of the plate Z6 to the lower end of the hoistway 1. It is said.

  These sections also show the direction of travel of the car 2. That is, when it is determined that the car 2 that has passed through each Z-phase plate has reached the sections 1 to 6, the car 2 is rising, and the car 2 that has passed through each Z-phase plate has reached the sections 12 to 17. When it is determined that the car 2 is descending.

  The operation of this prior art will be briefly described. FIG. 6 is a detailed view of the plate A3, B3, and Z3 portion of FIG. 3, and the case where the car 2 is raised will be described.

When the car 2 rises and reaches a1, the photoelectric sensor 4z detects the Z-phase plate Z3. When the car 2 further rises and reaches a2, the photoelectric sensor 4b detects the shielding part S of the B-phase plate B3. When the car 2 further rises and reaches a3, the photoelectric sensor 4a detects the shielding part S of the A-phase plate A3. When the car 2 further rises and reaches a4, the photoelectric sensor 4b ends the detection of the shielding part S of the B-phase plate B3 and detects the gap part G.
Similarly, the photoelectric sensor 4 sequentially detects the boundary between the gap G and the shielding part S of each phase plate, and the car 2 rises.

The plate group consisting of one A, B, and Z phase plate arranged in the hoistway 1 is different in the length of each phase plate, the number of gaps G and shielding portions S, and the installation position of each phase plate. The amount is different.
Therefore, although detailed description is omitted, the cage 2 has passed through which plate group in which direction by sequentially detecting the boundary portion between the gap portion G and the shielding portion S of each phase plate by the photoelectric sensor 4. Can be detected.
Thereby, it is possible to detect which section the car 2 is moving up and down.

  However, in the prior art described above, photoelectric sensors for three types of plates of A phase, B phase and Z phase and three types of plates of A phase, B phase and Z phase are required. In addition, if the system is duplicated for the purpose of improving safety, six light sensors are required, and there is a problem that it may be difficult to install in a car.

Therefore, in order to solve this problem, a device that detects the position of the car by using one photoelectric sensor and one phase plate (for example, see Patent Document 2) has been considered.
In this prior art, two plates are arranged at the car landing position on each floor, and the interval between the two plates on each floor is made different. Accordingly, the position of the car can be detected by detecting the interval between the two plates.

Japanese Patent Laid-Open No. 2006-141537 JP-A-9-278306

In the technique of Patent Document 2, two plates are required for each position (for example, the car landing position on each floor) where the car position is detected, and there is a problem that the configuration is complicated.
The present invention aims to solve the above-described problems.

  The present invention includes a moving distance detecting means for detecting a moving distance of an elevator car, a plurality of plates arranged in a hoistway, and a sensor installed in the car so as to face the plate. The plate has a plurality of types having different lengths in the vertical direction. By detecting the vertical length of the plate by the movement distance detecting means and the sensor, the position of the plate in which the car is located. It is the structure which specifies these.

In the present invention, the plates are all different in length in the vertical direction.
Further, according to the present invention, the plates are arranged on the upper side and the lower side of the hoistway, and the plates arranged on the upper side and the plates arranged on the lower side pass through the center of the hoistway. The sensors are symmetrically arranged in the vertical direction as the center, and the sensors are two types of sensors, that is, the sensor for the upper side plate and the sensor for the lower side plate.

  Further, in the present invention, the moving distance detecting means is an encoder, and outputs a pulse signal corresponding to the moving distance of the car, and the sensor outputs a signal for detecting that the position is opposite to the plate, The length in the vertical direction of the plate is characterized by being configured by the above-mentioned both outputs.

  ADVANTAGE OF THE INVENTION According to this invention, the number of the sensors installed in the plate arrange | positioned in a hoistway and a cage | basket | car can be reduced.

It is the schematic which shows the whole structure by embodiment of this invention. It is a figure which shows the principal part of the cage | basket ceiling part by embodiment of this invention. It is a figure which shows arrangement | positioning of the plate in the conventional hoistway. It is a figure which shows the principal part of the conventional cage | basket ceiling part. It is detail explanatory drawing of the conventional plate. It is positional relationship explanatory drawing of each conventional plate.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram showing an overall configuration according to the present embodiment, and FIG. 2 is a diagram showing a main part of a car ceiling.

  In FIG. 1, reference numeral 10 denotes a main rope having one end connected to the car 2, wound around a hoisting machine 12 and a deflector 13 disposed in the machine room 11, and the other end connected to a counterweight 14. . 15 is a governor disposed in the machine room 11, 16 is a tension pulley disposed in the lower part of the hoistway 1, 17 is a governor rope wound around the governor 15 and the tension pulley 16, and an intermediate portion is connected to the car 2. Has been.

  Reference numeral 20 denotes a control device disposed in the machine room 11, and reference numeral 21 denotes a traveling cable for exchanging signals and electric power between the car 2 and the control device 20. 22 is an encoder provided in the governor 15 and, like a general incremental type encoder, according to the amount of rotation, by outputting A phase and B phase signals to the control device 20, the moving distance and movement of the car 2 Detect direction. P1 to P6 are plates disposed in the hoistway 1 and have different lengths in the vertical direction. A photoelectric sensor 23 is installed on the upper part of the car 2 and detects the plates P1 to P6.

  In the present embodiment, the moving distance of the car 2 is always detected by a signal (pulse) from the encoder 22. The lengths of the plates P1 to P6 are detected by using the signal from the encoder 22 and the signal from the photoelectric sensor 23.

That is, when the photoelectric sensor 23 detects the plate and counts the signal of the encoder 22 in the section where the signal of the photoelectric sensor 23 is shielded by the plate, the length of the plate through which the car 2 has passed is It is represented by a signal, that is, the number of pulses.
By comparing the number of pulses with the lengths of the plates P1 to P6 stored in advance, it is possible to specify which plate the photoelectric sensor 23 of the car 2 has passed. Furthermore, the operation direction of the car 1 can be detected by the encoder 22.

  Therefore, it is possible to detect in which direction the car 2 has passed through which plate P1 to P6 from the above processing. Thereby, the position of the car 2 can be detected.

  As described above, according to the present embodiment, there is only one kind (one row) of plates and one photoelectric sensor for the plates. Moreover, what is necessary is just to arrange | position one plate in the location which detects a cage position. Therefore, the number of plates and photoelectric sensors can be reduced as compared with the prior art.

In the embodiment of FIG. 1, the lengths of the plates P1 to P6 in the vertical direction are longer as the lower plate is. However, the length of the upper plate may be longer. Moreover, if the length of each plate P1-P6 is different and it is known which plate of which length is arrange | positioned in which position, you may arrange | position in random order.
Further, the difference in length between the plates P1 to P6 only needs to be a difference in length that does not cause erroneous detection even if the count error of the encoder 22 or a delay in signal transmission is taken into consideration.

Moreover, in the said embodiment, although the length of all the plates is varied, if you may use two photoelectric sensors, you may arrange | position symmetrically up and down centering on the center of the hoistway 1. . For example, the plates P1 to P3 are arranged on the upper side, the plates P3 to P1 with the plates P1 to P3 arranged in reverse are arranged on the lower side, the upper plate is detected by the upper photoelectric sensor, and the lower plate is detected by the lower photoelectric sensor. To do.
Furthermore, in the said embodiment, although the plate is arrange | positioned at three places each on the upper and lower sides of the hoistway 1, it is not restricted to three places, What is necessary is just to increase / decrease the number of plates as needed.

Although the elevator having the machine room 11 has been described with reference to FIG. 1, it is needless to say that the elevator can be similarly applied to an elevator without a machine room. Further, the roping of the main rope 10 is not limited to the configuration shown in FIG.
Moreover, although the encoder 22 is provided in the governor, it can also be provided in a governor tension pulley, a sheave or a motor of a hoisting machine.

Furthermore, although the said plate is arrange | positioned at the upper and lower parts of a hoistway, it is also possible to arrange | position to only one of the upper and lower parts of a hoistway as needed. Furthermore, the present invention is not limited to ETS.
Further, the movement distance and movement direction of the car 2 are detected. However, if only the car position needs to be known, any movement distance of the car may be used.

  Moreover, although the photoelectric sensor 23 is used as a sensor, you may use other sensors, such as an infrared sensor, a magnetic sensor, an ultrasonic sensor, and image recognition.

DESCRIPTION OF SYMBOLS 1 Hoistway 2 Cage 15 Governor 16 Tension pulley 22 Encoder (movement distance detection means)
23 Photoelectric sensor P1-P6 Plate

Claims (4)

In one provided with a moving distance detecting means for detecting a moving distance of an elevator car, a plurality of plates arranged in a hoistway, and a sensor installed in the car so as to face the plate,
The plate has a plurality of types with different vertical lengths,
An elevator apparatus characterized in that a position of the car is specified by detecting a vertical length of the plate by the movement distance detecting means and the sensor.   2. The elevator apparatus according to claim 1, wherein the plates have different lengths in the vertical direction.   The plates are arranged on the upper side and the lower side of the hoistway, and the plates arranged on the upper side and the plates arranged on the lower side are vertically symmetrical about the center of the hoistway. 2. The elevator apparatus according to claim 1, wherein the elevator device includes two types of sensors: the upper plate sensor and the lower plate sensor.   The moving distance detecting means is an encoder, and outputs a pulse signal corresponding to the moving distance of the car, the sensor outputs a signal for detecting that the position is opposite to the plate, The elevator apparatus according to any one of claims 1 to 3, wherein the length is specified by the two outputs.