JP6841219B2 - Elevator equipment - Google Patents

Description

The present invention relates to a device for detecting the position of an elevator car traveling in a hoistway, and more particularly to a device for detecting the position of a car at the upper and lower ends of the hoistway, for example, an ETS (end floor forced deceleration device).

As a device for detecting the position of an elevator car traveling in a hoistway, there is a device in which a large number of position sensors are arranged 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 turning the position sensor on and off each time the car passes the installation location of the position sensor.
However, with this device, the number of position sensors increases, and the number of wiring cables for position sensors also increases.

Therefore, as a means for solving this problem, a photoelectric sensor is provided in the car, and a shielding plate (plate) for blocking the optical axis of the photoelectric sensor is arranged 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 overall configuration, and FIG. 5 is a view showing a main part of the car ceiling.

In the figure, reference numeral 1 denotes a hoistway through which the car 2 moves up and down, and P1 to P6 are plates arranged on the wall of the hoistway 1, which have different lengths in the vertical direction. Reference numeral 3 denotes a photoelectric sensor installed on the upper part of the car 2, which detects plates P1 to P6. Reference numeral 4 denotes a pair of guide rails for guiding the ascending / descending of the car 2.

Reference numeral 10 denotes a main rope having one end connected to the car 2, which is wound around a hoisting machine 12 and a deflecting wheel 13 arranged in the machine room 11, and the other end is connected to a counterweight 14. Reference numeral 15 is a governor arranged in the machine room 11, 16 is a tension pulley arranged 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. Has been done.

Reference numeral 20 denotes a control device arranged in the machine room 11, and reference numeral 21 denotes a traveling cable for transmitting and receiving signals and electric power between the car 2 and the control device 20. Reference numeral 22 denotes an encoder provided in the governor 15, which, like a general incremental encoder, outputs the A-phase and B-phase signals to the control device 20 according to the amount of rotation thereof, thereby moving the moving distance and moving of the car 2. Detect the direction.

In this technique, the moving distance of the car 2 is constantly detected by the signal (pulse) of the encoder 22. Further, the lengths of the plates P1 to P6 are detected by 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 the section where the signal of the photoelectric sensor 3 is shielded by the plate, the length of the plate through which the car 2 has passed is determined by the encoder 22. It is represented by the signal of, 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 identify which plate the photoelectric sensor 3 of the car 2 has passed through. Further, the driving direction of the car 1 can be detected by the encoder 22.

Therefore, from the above process, it is possible to detect which plate P1 to P6 the car 2 has passed in which direction. As a result, the position of the car 2 can be detected.

The above technique has the advantage that only one photoelectric sensor 3 is required, but since it detects the vertical lengths of the plates P1 to P6, as the types of plates increase, the length of the plates also increases. There is a problem that there is no choice but to do so.

Therefore, in order to solve this problem, one that determines the color of the plate instead of the length of the plate (see, for example, Patent Document 1) has been considered. In this technique, each plate has a different color, and a CCD camera mounted on the car detects the color of each plate to detect which plate the car 2 has passed through.
With this configuration, even if the types of plates increase, it is not necessary to increase the length of the plates because it can be dealt with by increasing the types of plate colors.

Special Table 2006-512568 Gazette

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

The present invention includes a plurality of objects to be detected arranged in the hoistway of an elevator and a detection device installed in a car so as to face the objects to be detected. The detection device has a plurality of detected parts having different reflectances or colors, and each detected body has a different combination of the plurality of detected parts, and the detection device identifies each of the detected parts. It is characterized in that it has a configuration for specifying each detected object.

Further, the present invention has a moving distance detecting means for detecting the moving distance of the elevator car, the lengths of the respective detected portions in the vertical direction are the same, and the detecting device by the moving distance detecting means is the subject. It is characterized in that each of the detected objects is specified by the detection of passing through the detection unit and the identification of the detected unit by the detection device.
Further, the present invention has a driving direction detecting means for detecting the driving direction of the elevator car, and the position of the car is specified by the driving direction signal from the driving direction detecting means and the specified object to be detected. It is characterized by having a structure.

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

According to the present invention, the length of the plate can be shortened at a relatively low cost.

It is a detailed explanatory drawing of the plate by embodiment of this invention. It is a detailed explanatory view of the plate which omitted the boundary part of the lower end by embodiment of this invention. It is a detailed explanatory view of the plate which omitted the boundary part of both upper and lower ends by embodiment of this invention. It is a schematic diagram which shows the conventional whole structure. It is a figure which shows the main 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 (detected body) 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 have any color of white W, black B, dark gray G1, and light gray G2. It is painted on.
Further, the required number of plate PAs are installed in the hoistway as in the plates P1 to P6 of FIG. 4, but each region of each plate PA has a different color scheme for each plate PA.

In this embodiment, the regions PA1, PA3, and PA5 are the boundary portions, the regions PA2, and PA4 are the identification portions, and the boundary portions PA1, PA3, and PA5 are provided with white W. The identification units PA2 and PA4 are arranged with any color of black B, dark gray G1, and light gray G2. In the example shown in FIG. 1, black B is arranged in the identification unit PA2 and dark gray G1 is arranged in the identification unit PA4.
Further, as a detection means for detecting the regions PA1 to PA5 of the plate PA, a proximity illuminance sensor (not shown) is installed in the car 2.

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, by storing the color combination of each identification unit PA2 and PA4 in advance for each plate PA, the car 2 passes through which plate PA according to the color of each identification unit PA2 and PA4 and the order of passage thereof. It is possible to identify the color.

For example, when the car 2 ascends the portion of the plate PA of FIG. 1, the sensor of the car 2 first detects the white W of the boundary portion PA5, so that the sensor reaches the position of any plate PA. You can see that.
Next, the car 2 rises to detect and store the dark gray G1 of the identification unit PA4. When the sensor further rises and detects the white W of the boundary portion PA3, the detection of the identification portion PA4 is completed.
Next, the car 2 rises to detect and store the black B of the identification unit PA2. When the sensor further rises and detects the white W of the boundary portion PA1, the detection of the identification portion PA2 is completed.

From this, it can be seen that the car 2 passed through the identification unit in the order of "dark gray G1 ⇒ black B". By comparing this combination of "dark gray G1 ⇒ black B" with the data stored in advance, it is possible to identify which plate PA the sensor of the car 2 has passed through.

By the way, if there is a plate PA in the plate PA in which the identification unit PA2 is dark gray G1 and the identification unit PA4 is black B, the identification unit PA2 is black B and is identified only by the above "dark gray G1 ⇒ black B". It is not possible to determine whether the part PA4 has raised the plate PA of the dark ash G1 or the identification part PA2 has lowered the plate PA of the dark ash G1 and the identification part PA4 has lowered the plate PA of the 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 through. it can.

For example, when the car 2 is raised and passes through the identification unit in the order of "dark gray G1 ⇒ black B", it can be seen that PA4 has passed through the dark gray G1 and PA2 has passed through the plate PA of black B. On the contrary, when the car 2 is lowered and passes through the identification part in the order of "dark gray G1 ⇒ black B", it can be seen that PA2 has passed through the dark gray G1 and PA4 has passed through the black B plate PA. ..

In this embodiment, the identification units PA2 and PA4 are arranged in any of black B, dark gray G1, and light gray G2, respectively, so that there are 3 × 3 = 9 types of plate PA varieties. 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 having high resolution, so that the cost can be suppressed.

Further, since it is sufficient that the colors of the regions PA1 to PA5 can be identified, it is not necessary to increase the length in the vertical direction. Therefore, the length of the plate PA in the vertical direction can be shortened.

Furthermore, if the number of identification units is increased by one step, 3 × 3 × 3 = 27 types, and if the number of colors is increased by another color, 4 × 4 = 16 types, so there are many types of plate PAs. It is possible to easily deal with the case.
Further, since the vertical length of each region may be short, if the number of colors is reduced and the number of stages of the identification unit is increased, the vertical length 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 driving direction of the car 2 without using the encoder 22.
For example, in the plate PA of FIG. 1, when the car 2 passes through the identification portion in the order of "dark gray G1 ⇒ black B", it is determined that the car 2 has raised the plate PA and "black B ⇒ dark ash". When the car 2 passes through 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 dark gray G1 and PA4 is black B in the plate PA, it can be determined which plate the car 2 has passed through only by the above "dark gray G1 ⇒ black B". Can not. Therefore, the plate PA in which PA2 is dark gray G1 and PA4 is black B is not used, that is, if there is a plate having a structure inverted in the vertical direction, only one of the plates is used to make the basket. The plate PA through which 2 has passed can be identified.
Then, the variety of the plate PA is limited, but when it is necessary to increase the variety of the plate PA, the number of stages of the identification unit may be increased or the number of colors may be increased.

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

In this embodiment, the regions PB1 and PB3 are the boundary portions, the regions PB2 and PB4 are the identification portions, and the boundary portions PB1 and PB3 are provided with white W.
Further, any of black B, dark gray G1, and light gray G2 is arranged in the identification units PB2 and PB4. In the example shown in FIG. 2, dark gray G1 is arranged in the identification unit PB2 and light gray G2 is arranged in the identification unit PB4.

Next, the case where the car 2 rises at the portion of the plate PB will be described. The proximity illuminance sensor (not shown) of the car 2 first detects the light gray G2 of the identification unit PB4, so that the sensor detects any of the plates. It can be seen that PB has been reached. Then, the light ash G2 of the identification unit PB4 is stored. By further rising and detecting the white W of the boundary portion PB3, the detection of the identification portion PB4 is completed.
Next, the car 2 rises to detect and store the dark gray G1 of the identification unit PB2. By further rising and detecting the white W of the boundary portion PB1, the detection of the identification portion PB2 is completed.

From this, it can be seen that the car 2 passed through the identification unit in the order of "light ash G2 ⇒ dark ash G1". By comparing this combination of "light gray G2 ⇒ dark gray G1" with the data stored in advance, it is possible to identify which plate PB the sensor of the car 2 has passed through.

Further, it can be seen that the car 2 is raised because the sensor of the car 2 did not detect the white W first. On the contrary, if the sensor of the car 2 first detects the white W, it can be seen that the car 2 is descending. 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, the boundary portion at the lower end of the plate is omitted, but the same applies even if the boundary portion at the upper end is omitted.
Further, it is also possible to use a plate in which the upper end boundary portion is omitted and a plate in which the lower end boundary portion is omitted in a mixed manner.
In this case, as described in the embodiment of FIG. 1, if there is a plate having a vertically inverted configuration, it is not possible to determine which plate the car has passed through, so that the vertically inverted plate is used. In some cases, it is necessary to use only one of the plates.

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

In this embodiment, the area PC2 is used as a boundary portion, the areas PC1 and PC3 are used as an identification unit, and white W is arranged on the boundary portion PC2.
Further, any of black B, dark gray G1, and light gray G2 is arranged on the identification units PC1 and PC3. In the example shown in FIG. 3, black B is arranged on the identification unit PC1 and light gray G2 is arranged on the identification unit PC3.

Next, a case where the car 2 raises the portion of the plate PC will be described. The proximity illuminance sensor (not shown) of the car 2 first detects the light gray G2 of the identification unit PC3, so that the sensor detects any of the plates. You can see that it has reached the PC. Then, the light ash G2 of the identification unit PC3 is stored. By further rising and detecting the white W of the boundary portion PC2, the detection of the identification portion PC3 is completed.
Next, the car 2 rises to detect and store the black B of the identification unit PC1.

From this, it can be seen that the car 2 passed through the identification unit in the order of "light gray G2 ⇒ black B". By comparing this combination of "light gray G2 ⇒ black B" with the data stored in advance, it is possible to identify which plate PC the sensor of the car 2 has passed through.

As in the embodiment of FIG. 1, this embodiment cannot detect the driving direction of the car 2 as it is. Therefore, as in the embodiment of FIG. 1, when the encoder 22 is used or there is a plate having a structure inverted in the vertical direction, it is necessary to use only one of the plates.
In each of the above embodiments, white W is arranged at the boundary portion, but a color other than white W may be used.

As yet another embodiment, all the boundary portions may be omitted from the plate so that only the identification portion is used. In this case, in order to distinguish adjacent identification units, it is necessary to limit that the same color is not used for the adjacent identification units.

Furthermore, it is also possible to omit all the boundary portions from the plate so that only the identification portion is used, and the same color can be used for the adjacent identification portions. In this method, the length of each identification unit in the vertical direction is made the same, and the signal (pulse) of the encoder 22 is used.

For example, the length of each identification unit in the vertical direction is set to n pulses of the encoder 22. Then, when the sensor of the car 2 passes through the identification unit for n pulses, the color of the identification unit is stored. Further, when n pulses are passed through the next identification unit, the color of the identification unit is memorized.
At this time, if the adjacent identification units are of the same color, the sensor passes through the identification units of the same color for 2n pulses, so that it is possible to determine that the identification units of the same color are adjacent to each other. it can. The same applies even if the identification portions of the same color are further continuous.
With such a configuration, the white W used as the color of the boundary portion in the above-described 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 gray G1, and light gray G2 can be arranged in each region PC1, PC2, and PC3, respectively. By using the driving direction signal together, 4 × 4 × 4 = 64 types of varieties can be realized.
Further, even if the number of color types is reduced to three, 3 × 3 × 3 = 27 types of variety can be realized, so that an inexpensive sensor with low resolution can be used.

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

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

In addition, each of the above embodiments can be applied to any elevator with or without a machine room, and an encoder can also be provided on a tension pulley of a governor, a sheave or a motor of a hoisting machine. .. Further, it is not limited to the encoder, and any one that can detect the driving direction of the car is sufficient.

Further, the plate can be arranged not only at the upper and lower ends of the hoistway but also at either the upper and lower ends of the hoistway. Further, although the plate is used as the object to be detected by the sensor, the plate is not limited as long as it has a structure capable of identifying the region provided on the object to be detected. For example, the detected body or the detected portion may be provided directly on the wall of the hoistway or the guide rail.
Furthermore, although a proximity illuminance sensor is used as the sensor, other sensors such as a CCD camera can also be used. Nor is the invention limited to ETS.

1 Hoistway 2 Car 3 Photoelectric sensor 15 Governor 16 Tension pulley 22 Encoder PA, PB, PC, P1 to P6 Plates (objects to be detected)
PA1 to PA5, PB1 to PB4, PC1 to PC3 regions (detected part)

Claims (3)

In the one provided with a plurality of detected objects arranged in the hoistway of the elevator and a detection device installed in a car so as to face the detected objects.
The detected body has a plurality of detected parts having different reflectances or colors, and each detected body includes at least one set in which the combination of the plurality of detected parts is inverted in the vertical direction. Different,
The detection device has a configuration for identifying each of the detected objects by identifying each of the detected units.
Further, it has a driving direction detecting means for detecting the driving direction of the car independently of the order of identification of each detected portion.
By the driving direction signal from the driving direction detecting means and the specified detected body, which of the set of the detected bodies having an inverted relationship is detected is specified, and the position of the car is determined. An elevator device having a specific configuration. The elevator device according to claim 1, wherein the reflectances or colors of the detected portions at the upper and lower ends of each of the detected objects are the same. The elevator device according to claim 1, wherein the reflectances or colors of the detected portions at the upper and lower ends of each of the detected objects are the same.