JPH0551178A - Elevator cage position detecting device - Google Patents

Abstract

PURPOSE:To provide an elevator cage position detecting device not only detecting the cage position in the non-contact state but also attaining compactness and improving the detection accuracy of action points. CONSTITUTION:There are provided detected plates 10, having different position codes in correspondence with each action point, fitted individually into plural positions in an elevating path 1 with an elevator cage 6 operated therein; a U-shape detector 9 provided at the elevator cage 6, opposedly in the non-contact state to the detected plates 10; and a read means for reading the position code on the basis of a detection signal from the detector 9. Highly accurate information to each action point position is thereby detected using small detected plates.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator position detecting device for non-contact detection of an end portion or a specific portion of an elevator hoistway, and more particularly to a small and highly accurate elevator position detecting device.

[0002]

2. Description of the Related Art Generally, in an elevator system, in order to prevent the elevator car from colliding with the end portion of the hoistway or overrunning the floor position to be stopped, the position in the hoistway is always maintained. Safety is secured by detecting it.

FIG. 5 is an enlarged perspective view of essential parts showing a conventional elevator position detecting device disclosed in, for example, Japanese Patent Laid-Open No. 62-280174. In the figure, 1 is a hoistway wall through which an elevator car (not shown) is hoisted, 2 is a detection plate provided at a predetermined position of the terminal floor or a specific floor of the hoistway wall 1, and 2a to 2d are Stepped notch provided on the detected plate 2, 9 is a U-shaped detector provided on the elevator car so as to face the detected plate 2, and 9A to 9D are provided on one side of the detector 9. The light projectors 9a to 9d are light receivers provided on the other side surface of the detector 9. The light projectors 9A to 9D and the light receivers 9a to 9d are individually arranged so as to face each other, and are arranged corresponding to the positions of the cutouts 2a to 2d, respectively.

Next, the operation of the conventional elevator position detecting device shown in FIG. 5 will be described. Here, let us consider a case where the detected plate 2 is an upper detected plate and the detector 9 rises together with the elevator car from below the hoistway. First, when the light receiver 9a is shielded from light by the notch 2a, it is detected that the elevator car has reached the first operating point. Similarly, the cutouts 2b to 2d are used for the receiver 9b.
It is detected that the second to fourth operating points have been reached each time 9d is sequentially shielded.

[0005]

As described above, since the conventional elevator position detecting device uses the detected plate 2 having the stepped notches 2a to 2d, the detected plate 2 becomes large in size. In addition, there is a problem that the detection accuracy cannot be improved.

The present invention has been made to solve the above problems, and not only detects the position of a car without contact, but also downsizes the entire detector and improves the accuracy of the detection operating point. The purpose is to obtain an elevator position detection device.

[0007]

According to a first aspect of the present invention, there is provided an elevator position detecting device which is individually attached to a plurality of positions in a hoistway in which an elevator car is operated, and which positions are different corresponding to respective operating points. A detected plate having a code,
It is provided with a U-shaped detector provided in the elevator car and facing the plate to be detected in a non-contact manner, and a reading means for reading a position code based on a detection signal from the detector.

Further, in the elevator position detecting apparatus according to the second aspect of the present invention, the position code is arranged in parallel with the code element row in which the position code is arranged in the direction perpendicular to the moving direction of the detector. And another code element sequence.

[0009]

According to the first aspect of the present invention, a small-sized detection target plate is used to detect highly accurate information for each operating point position.

According to the second aspect of the present invention, the density of the position code is improved to further reduce the size and increase the accuracy.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing an embodiment of the present invention,
1 and 9 are the same as described above. 6 is an elevator car to which the detector 9 is attached, 7 is a rope for holding the elevator car 6 and moving it up and down, and 8 is the uppermost floor which is the upper limit of operation of the elevator car 6. Reference numeral 10 is a plate to be detected individually attached to a plurality of positions of the hoistway wall 1 corresponding to the upper terminal floor.
Has a different position code corresponding to each operating point.

FIG. 2 is an enlarged perspective view showing the plate to be detected 10 corresponding to the third operating point together with the detector 9. The detector 9 includes six light projecting portions 9A to 9F and light receiving portions 9a to 9f. And the detected plate 10 has a plurality of code elements 10a-10f and 11a-1.
It has a position code consisting of 1f.

The position code on the plate 10 to be detected is a code element string arranged in a direction perpendicular to the moving direction of the detector 9.
10a to 10f and other code element rows 11a to 11f arranged in parallel with the code element rows 10a to 10f, and each code element row is arranged so as to face the light emitter and the light receiver of the detector 9. In this case, code elements 10a, 10e, 10f, 11b, 11 shown in black
e and 11f are light-transmitting portions, and the other code elements (shown in white) are light-shielding portions.

Of the two rows of code elements, the upper light-transmitting portion 10a is a code element for detecting the descending operation, and the lower light-transmitting portion 10a.
Reference numeral 11b is a code element for detecting the ascending operation, and the other code elements 10c to 10f and 11c to 11f indicate the third operating point at the time of descending and at the time of ascending, respectively. Similarly, the corresponding code elements on the other detected plate 10 in FIG. 1 indicate the first and second operating points, respectively, starting from the upper detected plate 10.

FIG. 3 is a block diagram showing an arithmetic processing circuit installed in the elevator car 6 or a machine room (not shown), and 21 is an input circuit for taking in the detection signal D from the detector 9, 22. Is a CPU that controls arithmetic processing based on the detection signal D, and 23 is a ROM that stores an operation program of the CPU 22.

Numeral 24 is a RAM in which the calculation processing result in the CPU 22 is written, and a position code indicating the operating point of each detected plate 10, that is, an "operating point code", and the position of the elevator car 6 corresponding to the operating point code. And “car position data” indicating “” are stored as a map. The CPU 22 and the RAM 24 constitute a reading unit that reads the position code based on the detection signal D.

The operation of the embodiment of the present invention shown in FIGS. 1 to 3 will now be described with reference to the flowchart of FIG. 4 showing the arithmetic processing of the CPU 22. First, in the detector 9, each of the light receivers 9a to 9f responds to the light projectors 9A to 9F and is "0" when the light is shielded and "1" when the light is transmitted.
Is generated as the detection signal D. The detection signal D is fetched by the CPU 22 via the input circuit 21 and processed. At this time, the detection signal D
Is "000000" when all the light receivers 9a-9f are shielded from light,
When all the light is transmitted, it becomes “111111”.

Now, when the elevator car 6 rises from below and passes through the plate 10 to be detected in FIG. 2, there is nothing to block light while the detector 9 is located below the plate 10 to be detected. The detection signal D is “111111”. Next, when the detector 9 is positioned below the plate to be detected 10, all the light receivers 9a to 9f are shielded from light, and the detection signal D becomes "000000".

Further, when the elevator car 6 rises and the detector 9 is located in the lower code element row 11a to 11f, the detection signal D becomes "010011". Thus, the detection signal D is "1
The CPU 22 starts the arithmetic processing operation of FIG. 4 for the first time when the position code is changed to “11111” and “000000”.

First, the CPU 22 confirms the position code "010011" of the detection signal D (step S1), recognizes from the last two digits of the position code to the third operating point code "03", and subsequently, , It is determined whether or not it is the upper terminal floor (step S2),
Recognize that it is the upper end floor from the last 4 digits of the position code.

Next, it is judged whether or not the elevator car 6 has operated in the ascending operation (step S3), and it is recognized from the upper two digits of the position code that the elevator car 6 is in the ascending operation. Then, as shown in FIG. 3, the car position data in the RAM 24 for the operating point code "03" is set from "00" to "FF" (step S4).

Next, when the elevator car 6 further rises and the detector 9 passes through the plate 10 to be detected at the second operating point, the car position data corresponding to the operating point code "02" is "00" as described above. Is set to "FF". Thus, when the second operating point is detected, the CPU 22 controls the speed and the like so that the elevator car 6 surely stops at the upper terminal floor.

On the other hand, from the upper end floor to the elevator car 6
Is moved downward and passes through the plate 10 to be detected at the second operating point, the code element string for detecting the downward movement is read to determine the downward operation (step S5), and the car position data for the operating point code "02" is determined. Is reset from "FF" to "00" (step S6). When the detector 9 further descends and the detector 9 passes through the plate 10 to be detected at the third operating point, similarly, the car position data for the operating point code "03" is reset from "FF" to "00".

Then, the fourth to the lower terminal floors (not shown)
When the sixth operating point is reached, the car position data for the operating point codes "04" to "06" in the RAM 24 are set from "00" to "FF". By the above operation, a table of "car position data" for the "operating point code" of the terminal floor is formed in the RAM 24. Thus, by using the table of car position data sequentially stored in the RAM 24 in real time, C
The PU 22 can surely recognize the position of the elevator car 6 and can perform optimal control according to the car position.

In the above embodiment, the detected plate 10 represents the operating point code for the terminal floor, but the operating point code for any given position of the hoistway wall 1 can be represented. Further, the case where the code element row on the plate to be detected 10 is 6 digits and 2 rows is shown, but it goes without saying that if the capacity in the detector 9 and the RAM 24 is increased, it can be set to an arbitrary plural digits and plural examples.

[0026]

As described above, according to the first aspect of the present invention, the position codes that are individually attached to a plurality of positions in the hoistway in which the elevator car is operated and that correspond to the respective operating points are different. A small-sized object plate that includes a plate to be detected, a U-shaped detector that is provided in the elevator car and faces the plate to be detected in a non-contact manner, and a reading unit that reads a position code based on a detection signal from the detector. Since the detection plate is used to detect highly accurate information for each operating point position, not only can the car position be detected in a non-contact manner, but the detector as a whole can be made smaller and the accuracy of the detected operating point can be improved. There is an effect that the elevator position detecting device can be obtained.

Further, according to the invention of claim 2 of the present invention,
Since the position code includes a code element string arranged in a direction perpendicular to the moving direction of the detector and another code element string arranged in parallel to this code element string, the density of the position code is improved. Further, there is an effect that an elevator position detecting device that realizes further downsizing and higher accuracy can be obtained.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a main part of the apparatus shown in FIG.

FIG. 3 is a side view showing an arithmetic processing control unit according to an embodiment of the present invention.

FIG. 4 is a flowchart showing the operation of FIG.

FIG. 5 is an enlarged perspective view of a main part of a conventional elevator position detecting device.

[Explanation of symbols]

 1 Hoistway wall 6 Elevator car 9 Detector 10 Detected plate 22 CPU 24 RAM 10a to 10f, 11a to 11f Code element row D Detection signal

Claims (2)

[Claims] 1. A detection plate which is individually attached to a plurality of positions in a hoistway in which an elevator car is operated and has different position codes corresponding to respective operating points, and the detection plate which is provided on the elevator car. An elevator position detecting device comprising: a U-shaped detector that faces the plate in a non-contact manner; and a reading unit that reads the position code based on a detection signal from the detector. 2. The position code includes a code element string arranged in a direction perpendicular to the moving direction of the detector, and another code element string arranged in parallel to the code element string. The elevator position detecting device according to claim 1.