JP2019112215A - Elevator device - Google Patents

Abstract

To shorten the length of a plate of a detector which detects the location of a plate where a car is by identifying a plate out of a plurality of plates arranged in a hoistway of an elevator, with a sensor provided on the car so as to face the plates.SOLUTION: A plurality of plates PA is arranged in a hoistway. Each plate PA has a structure in which a plurality of regions PA1-PA5 is arranged in a vertical direction, and each region PA1-PA5 has a different color according to the combination of each plate PA. The sensors arranged on the car specify the plate PA by identifying the color of the regions PA1-PA5.SELECTED DRAWING: Figure 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 lower end of the hoistway, such as an ETS (terminating floor forced reduction gear).

As a device for detecting the position of an elevator car traveling in the hoistway, there is a configuration in which a large number of position sensors are disposed in the hoistway and a cam for operating the position sensor is installed in the car. This device detects the position of the car by the cam turning on and off the position sensor each time the car passes through the installation position of the position sensor.
However, with this device, the number of position sensors increases, and the wiring cables of the position sensors also increase.

  Therefore, as a means to solve this problem, there is provided a photoelectric sensor in a car and a shielding plate (plate) for blocking the optical axis of the photoelectric sensor in the hoistway (see, for example, Japanese Patent Application No. 2016-209263). It is considered.

  This device will be described with reference to the drawings. FIG. 4 is a schematic view showing the entire configuration, and FIG. 5 is a view showing the main part of the car ceiling.

  In the figure, reference numeral 1 denotes a hoistway along which the car 2 moves up and down, and P1 to P6 denote plates disposed on the wall of the hoistway 1, and the lengths in the vertical direction are different. A photoelectric sensor 3 is installed at the upper part of the car 2 and detects the plates P1 to P6. Reference numeral 4 denotes a pair of guide rails for guiding the raising and lowering of the car 2.

  A main rope 10 is connected at one end to the car 2 and wound around a hoist 12 and a diverter 13 disposed in the machine room 11, and the other end is connected to a counterweight 14. Reference numeral 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 the intermediate portion is connected to the car 2 It is done.

  Reference numeral 20 denotes a control device disposed in the machine room 11, and 21 denotes a traveling cable for exchanging signals and power between the car 2 and the control device 20. An encoder 22 provided in the governor 15 outputs the A-phase and B-phase signals to the control device 20 in accordance with the amount of rotation as in a general incremental encoder, thereby moving the car 2 and moving the car 2 Detect the direction.

  In this technology, the movement distance of the car 2 is always detected by the signal (pulse) of the encoder 22. The detection of the lengths of the plates P1 to P6 is performed using the signal of the encoder 22 and the signal of the photoelectric sensor 3.

That is, by detecting the plate by the photoelectric sensor 3 and counting the signal of the encoder 22 in a section where the signal of the photoelectric sensor 3 is blocked by the plate, the length of the plate through which the car 2 passes is the encoder 22 , Or the number of pulses.
By comparing the number of pulses with the length of the plates P1 to P6 stored in advance, it is possible to specify which plate the photoelectric sensor 3 of the car 2 has passed. Further, detection of the operation direction of the car 1 can be performed by the encoder 22.

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

  The above-mentioned technology has the merit that only one photoelectric sensor 3 is required, but since the length in the vertical direction of the plates P1 to P6 is detected, if the number of types of plates increases, the plate length also increases. There is a problem that it is inevitable.

Therefore, in order to solve this problem, it is considered to determine not the length of the plate but the color of the plate (see, for example, Patent Document 1). In this technology, each plate is made a different color, and a CCD camera mounted on a car is used to detect which plate the car 2 has passed by determining the color of each plate.
With this configuration, even if the number of plate types increases, the number of plate colors can be increased to cope with the increase, and therefore it is not necessary to increase the plate length.

Japanese Patent Application Publication No. 2006-512568

The technique of Patent Document 1 has a problem that it becomes expensive because a high-performance CCD camera is required to determine the color of a large number of plates.
The present invention aims to solve the above-mentioned problems.

  According to the present invention, the object to be detected includes a plurality of objects to be detected arranged in a hoistway of an elevator, and a detection device installed in a car so as to face the object to be detected. While having a plurality of to-be-detected parts from which a reflectance or a color differs, each to-be-detected body differs in the combination of the said to-be-detected part, The said detection apparatus identifies the said each to-be-detected part. The present invention is characterized in that it is configured to identify each object to be detected.

The present invention further comprises moving distance detecting means for detecting the moving distance of the elevator car, wherein the lengths of the respective detection portions in the vertical direction are the same, and the detecting device according to the moving distance detecting means The detection object is identified by detecting that the detection object has passed and by identifying the detection object by the detection device.
Furthermore, the present invention has driving direction detection means for detecting the driving direction of the elevator car, and identifies the position of the car based on the driving direction signal from the driving direction detection means and the specified object to be detected. It is characterized in that it is a configuration.

Furthermore, the present invention is characterized in that the reflectances or colors of the detection portions at the upper and lower ends of each of the detection objects are the same.
Further, the present invention is characterized in that the reflectances or colors of the detection portions at the upper and lower ends of each of the detection objects are the same.

  According to the present invention, the plate length can be made relatively inexpensive and short.

It is detail explanatory drawing of the plate by embodiment of this invention. It is detail explanatory drawing of the plate which abbreviate | omitted the boundary part of the lower end by embodiment of this invention. It is detail explanatory drawing of the plate which abbreviate | omitted the boundary part of the upper-and-lower both ends by embodiment of this invention. It is the schematic which shows the conventional whole structure. It is a figure which shows the principal part of the conventional car ceiling part.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a detailed explanatory view of a plate (a detection target) according to the present embodiment.

The plate PA of FIG. 1 has five regions (detected portions) PA1 to PA5 in the vertical direction, and these regions are any of white W, black B, dark ash G1, and light ash G2 It is painted on.
Further, the plate PA is installed in the hoistway as many as necessary as the plates P1 to P6 in FIG. 4, but the areas of the plates PA are different in color arrangement for each plate PA.

In this embodiment, the areas PA1, PA3 and PA5 are boundaries, the areas PA2 and PA4 are identifications, and white W is disposed in the areas PA1, PA3 and PA5. The color of any one of black B, deep ash G1 and light ash G2 is disposed in the identification portions PA2 and PA4. In the example shown in FIG. 1, black B is assigned to the identification part PA2 and dark ash G1 is assigned to the identification part PA4.
Further, a proximity illumination sensor (not shown) is installed in the car 2 as a detection means for detecting the areas PA1 to PA5 of the plate PA.

  The color combination of the identification portions PA2 and PA4 is different for each plate PA, and the boundary portion is white W for each plate PA. Then, the color combinations of the identification parts PA2 and PA4 are stored in advance for each plate PA, so that the car 2 passes through which plate PA according to the colors of the identification parts PA2 and PA4 and the passing order thereof. It makes it possible to identify.

For example, when the car 2 ascends the plate PA of FIG. 1, the sensor of the car 2 first detects the white W of the boundary PA 5 so that the sensor reaches the position of any plate PA I understand that.
Next, the car 2 ascends to detect and store thick ash G1 of the identification unit PA4. When the sensor further moves up and detects white W of the boundary portion PA3, the detection of the identification unit PA4 ends.
Next, the car 2 ascends to detect and store black B of the identification unit PA2. When the sensor further rises and detects white W of the boundary portion PA1, the detection of the identification unit PA2 ends.

  Thus, it can be seen that the car 2 has passed the identification portion in the order of "dark ash G1 black B". By comparing the combination of “dark ash G1 → black B” with data stored in advance, it is possible to identify which plate PA the sensor of the car 2 has passed.

By the way, if there is a plate PA in which the identification portion PA2 is dark ash G1 and the identification portion PA4 is black B in the plate PA, the identification portion PA2 is black B, identification only in the above "dark ash G1 → black B". It can not be determined whether the car 2 has moved up the plate PA of the thick ash G1 in the part PA4 or the car 2 has lowered the plate PA of the identification part PA2 in the thick ash G1 and the recognition part PA4 is black B.
Therefore, if the driving direction of the car 2 is detected by the encoder 22 and the driving direction signal of the car 2 and the passing order of the identification unit are combined, it is possible to determine which plate PA the car 2 has passed. it can.

  For example, when the car 2 is elevated, if it passes the identification part in the order of “dark ash G1 → black B”, it is understood that PA4 passes dark ash G1 and PA2 passes plate B of black B. On the other hand, if the car 2 passes through the identification section in the order of "dark ash G1 黒 black B" when the car 2 descends, it can be understood that PA2 passes dark ash G1 and PA4 passes the plate B of black B .

  In this embodiment, since any one of black B, deep ash G1 and light ash G2 is arranged for the identification parts PA2 and PA4, the plate PA has 3 × 3 = 9 kinds of variety. Therefore, the sensor only needs to be able to distinguish four colors of white, black, dark gray, and light gray, and it is not necessary to use a high-performance sensor with high resolution, so the cost can be reduced.

  Further, it is not necessary to increase the length in the vertical direction because it is sufficient for each of the areas PA1 to PA5 to be able to identify the color. Therefore, the length in the vertical direction of the plate PA can be shortened.

Furthermore, when the number of identification parts is increased by one more step, 3 × 3 × 3 = 27 types, and when the number of colors is increased by 1 more color, 4 × 4 = 16 types, so there are many types of plate PA. The case can be easily coped with.
In addition, since the length in the vertical direction of each region may be short, if the number of colors is reduced to increase the number of stages of the identification part, the length in the vertical direction of the plate PA is relatively short, but the resolution is lower Sensors can be used.

In the above embodiment, it is also possible to detect the operating direction of the car 2 without using the encoder 22.
For example, in the plate PA of FIG. 1, when the car 2 passes the identification part in the order of "dark ash G1 黒 black B", it is determined that the car 2 has lifted the plate PA, "black B 濃 dark ash When the car 2 passes the identification unit in the order of “G1”, it can be determined that the car 2 has lowered the plate PA.

In this case, if there is a plate PA in which PA2 is thick ash G1 and PA4 is black B in the plate PA, it is determined which plate has passed through the car 2 only with the above "dark ash G1 → black B". Can not. Therefore, do not use the plate PA where PA2 is thick ash G1 and PA4 is black B. In other words, if there is a plate with a configuration that is reversed in the vertical direction, using only one of the plates 2 makes it possible to identify the plate PA which has passed.
Then, although the variety of the plate PA is limited, when it is necessary to increase the variety of the plate PA, the number of stages of the identification portion may be increased or the number of colors may be increased.

  Furthermore, the boundaries between the upper and lower ends of the plate can be omitted. FIG. 2 shows an example in which the lower boundary portion is omitted. In this embodiment, the plate PB has four regions PB1 to PB4 in the vertical direction, and each region is white W, black B, dark ash G1, light as in the embodiment of FIG. Any color of gray G2 is painted.

In this embodiment, the areas PB1 and PB3 are boundaries, the areas PB2 and PB4 are identifications, and white W is disposed at the boundaries PB1 and PB3.
Further, any one of black B, deep ash G1 and light ash G2 is disposed in the identification portions PB2 and PB4. In the example shown in FIG. 2, the thick ash G1 is disposed in the identification part PB2, and the light ash G2 is disposed in the identification part PB4.

Next, to explain the case where the car 2 ascends the plate PB, the proximity illumination sensor (not shown) of the car 2 first detects the light ash G2 of the identification part PB4 so that the sensor detects any plate. It is understood that it reached the PB. Then, the light ash G2 of the identification unit PB4 is stored. The detection of the identification part PB4 is completed by further rising to detect the white W of the boundary part PB3.
Next, the car 2 ascends to detect and store thick ash G1 of the identification part PB2. The detection of the identification part PB2 is completed by further rising and detecting the white W of the boundary part PB1.

  From this, it can be seen that the car 2 has passed the identification part in the order of “light ash G2 → thick ash G1”. By comparing the combination of “light ash G2 → thick ash G1” with data stored in advance, it is possible to specify which plate PB the sensor of the car 2 has passed.

  Furthermore, the fact that the sensor of the car 2 did not detect white W initially indicates that the car 2 is rising. Conversely, if the sensor of the car 2 first detects white W, it can be known that the car 2 is lowered. Therefore, in this embodiment, not only the position of the car 2 but also the driving direction of the car 2 can be detected.

In the embodiment of FIG. 2, although the boundary of the lower end of the plate is omitted, the same is true even if the boundary of the upper end is omitted.
Furthermore, it is also possible to mix and use the plate which abbreviate | omitted the boundary part of the upper end, and the plate which abbreviate | omitted the boundary part of the lower end.
In this case, as described in the embodiment of FIG. 1, if there is a plate having a configuration inverted in the vertical direction, it is not possible to determine which plate the car has passed, so the plate having the configuration inverted in the vertical direction In some cases, it may be necessary to use only one of the plates.

  FIG. 3 shows an example in which the boundaries between the upper and lower ends are omitted. In this embodiment, the plate PC has three regions PC1 to PC3 in the vertical direction, and each region is white W, black B, dark ash G1, light as in the embodiment of FIG. Any color of gray G2 is painted.

In this embodiment, the area PC2 is a boundary, the areas PC1 and PC3 are identifications, and white W is disposed in the boundary PC2.
Further, any one of black B, deep ash G1 and light ash G2 is arranged in the identification parts PC1 and PC3. In the example shown in FIG. 3, black B is assigned to the identification part PC1 and light gray G2 is assigned to the identification part PC3.

Next, the case where the car 2 ascends the portion of the plate PC will be described. The proximity illumination sensor (not shown) of the car 2 first detects any light ash G2 of the identification part PC3 so that the sensor can detect any plate. It is understood that it reached the PC. Then, the light ash G2 of the identification unit PC3 is stored. The detection of the identification unit PC3 is ended by further rising to detect the white W of the boundary portion PC2.
Next, the car 2 ascends to detect and store black B of the identification unit PC1.

  Thus, it can be seen that the car 2 has passed the identification section in the order of "light ash G2 black B". By comparing this "light ash G2 black B" combination with data stored in advance, it is possible to specify which plate PC the sensor of the car 2 has passed.

This embodiment can not detect the operating direction of the car 2 as it is, as in the embodiment of FIG. Therefore, as in the embodiment of FIG. 1, when using the encoder 22 or when there is a plate having a configuration inverted in the vertical direction, it is necessary to use only one of the plates.
Although white W is disposed at the boundary in each of the above embodiments, colors other than white W may be used.

  In still another embodiment, all the boundaries can be omitted from the plate, and only the identification unit can be used. In this case, in order to distinguish adjacent identification units, it is necessary to limit the adjacent identification units not to use the same color.

  Furthermore, it is possible to omit all the boundaries from the plate and use only the identification part and to use the same color for the adjacent identification parts. In this method, the length in the vertical direction of each identification unit is made equal, and the signal (pulse) of the encoder 22 is used.

For example, the length in the vertical direction of each identification unit is set to n pulses of the encoder 22. Then, when the sensor of the car 2 passes n pulses through the identification unit, the color of the identification unit is stored. Further, when n pulses pass through the next discrimination unit, the color of the discrimination unit is stored.
At this time, if adjacent identification parts have the same color, the sensor passes 2 n identification parts of the same color, so it is possible to determine that identification parts of the same color are adjacent it can. The same is true even if identification units of the same color are further consecutive.
With such a configuration, the white W used as the color of the boundary in the above embodiment can also be used as the color of the identification portion.

For example, in the case of the plate PC of FIG. 3, four colors of white W, black B, dark ash G1 and light ash G2 can be arranged in the respective areas PC1, PC2 and PC3, respectively. If the driving direction signal is used in combination, 4 × 4 × 4 = 64 varieties can be realized.
In addition, even if the number of types of colors is reduced to three, a variety of 3 × 3 × 3 = 27 types can be realized, so an inexpensive sensor with low resolution can be used.

  As described above, in each of the embodiments shown in FIGS. 2 and 3 as in the embodiment shown in FIG. 1, the length of the plate in the vertical direction can be shortened, and the sensor has high resolution and high performance. Since it is not necessary to use, cost can be held down. Further, since the number of identification portions and the number of colors can be easily increased or decreased, the type of plate can be easily increased or decreased.

  In each of the above embodiments, the colors of white, black, dark ash and light ash are used in the area of the plate, but the present invention is not limited to this. Also, the reflectance of the area may be changed, or other colors may be used.

  Further, each embodiment described above can of course be applied to any elevator with or without a machine room, and an encoder can also be provided on the tension pulley of the governor, the sheave of the hoist, or the motor . Furthermore, it is not limited to the encoder, as long as it can detect the driving direction of the car.

Furthermore, the plate can be disposed not only at the upper and lower end portions of the hoistway but also at either one of the upper and lower portions of the hoistway. Moreover, although the plate is used as a to-be-detected body detected by a sensor, if it is a thing of the structure which can identify the area | region provided in the to-be-detected body, it will not restrict to a plate. For example, the detection subject or the detection target may be provided directly on the wall or guide rail of the hoistway.
Furthermore, although a proximity illumination sensor is used as a sensor, other things, such as a CCD camera, can also be used. Nor is the invention limited to ETS applications.

1 shaft 2 cage 3 photoelectric sensor 15 governor 16 tension pulley 22 encoder PA, PB, PC, P1 to P6 plate (detected body)
PA1 to PA5, PB1 to PB4, PC1 to PC3 area (detected part)

Claims (5)

In the one provided with a plurality of objects to be detected arranged in a hoistway of an elevator, and a detection device installed in a car so as to face the object to be detected,
The to-be-detected body has a plurality of to-be-detected portions different in reflectance or color, and each to-be-detected body is different in combination of the plurality of to-be-detected portions.
An elevator apparatus characterized in that the detection device is configured to identify each of the objects to be detected by identifying each of the objects to be detected. It has moving distance detecting means for detecting the moving distance of the elevator car, and the lengths in the vertical direction of the respective detected parts are the same,
The detection target is identified by detecting that the detection device has passed the detection target by the movement distance detection means, and identifying the detection target by the detection device. The elevator apparatus according to claim 1. Operation direction detection means for detecting the operation direction of the elevator car;
The elevator apparatus according to claim 1 or 2, characterized in that the position of the car is specified by the driving direction signal from the driving direction detection means and the specified detected object.   The elevator apparatus according to claim 1 or 3, wherein the reflectances or colors of the detection portions at the upper and lower ends of each of the detection objects are the same.   The elevator apparatus according to claim 1 or 3, wherein the reflectances or colors of the detection portions at the upper and lower ends of the detection objects are the same.