JPS646110B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an elevator position detection device,
In particular, it relates to detecting the position of a car in a hoistway.

[Background of the invention]

The first example of a conventional elevator position detection device is
As shown in FIG. Figure 1 shows the configuration of the elevator, with elevator car 1 and counterweight 2.
is suspended from a sheave 4 via a rope 3 in a hanging shape. A driving electric motor (not shown) is connected to the sheave 4, and the driving electric motor moves the car 1 up and down in the hoistway along the guide rail 5. A detector 6 constituting a position detection device is attached to the upper part of the car 1, and a detection plate 7 is attached to the hoistway side via an arm 8 from a guiding guide rail 5. The detection plate 7 is installed at a position opposite to the detector 6 when the floor surface of the elevator car and the floor surface of the entrance/exit of the hall match. Detect the position of. 11 is a signal cable that transmits the output signal from the detector 6 to an elevator control device (not shown).

FIG. 2 is an enlarged view of the position detection device in FIG. 1. In FIG. 2, the detector 6 includes a reed switch 9 and a permanent magnet 10, and the detection plate 7 is composed of a magnetic shielding plate. Therefore, if the contact of the reed switch 9 is a normally open contact, the contact of the reed switch 9 is normally closed due to the magnetism of the permanent magnet 10. When the elevator car reaches a position corresponding to the floor, the detection plate 7 is inserted into the groove of the detector 6 as shown in FIG. The contacts of the reed switch 9 are opened to create a magnetic path. With the above configuration, the position detection device detects the position of the elevator car.

In such a conventional position detection device, the detection plate 7 is installed in an empty space in the hoistway where other equipment (final switch, slowdown cam, etc.) is installed, so it is not necessary to design it each time installation work is performed. Unavoidably, its installation and adjustment were very time-consuming.

Further, since there are protrusions such as the detection plate 7 and the arm 8 in the hoistway, there is a danger that the signal cable 11 may become tangled and cut due to vibrations such as an earthquake.

On the other hand, in addition to such a position detection device, a device in which a detector and a detection plate are installed on a car door and a landing door is also known (see Japanese Utility Model Publication No. 53-52772).
However, even in the above example, there is an opening/closing ring on the landing side of the car door that opens and closes the door using the rotation of the motor, so installation space is limited, and the wiring for the door that moves left and right is limited. Various problems remained, such as making the process complicated and difficult, or requiring the effort of moving the elevator and opening and closing only one door when inspecting a malfunction.

[Purpose of the invention]

In view of the above-mentioned problems, the purpose of the present invention is to
An object of the present invention is to provide an elevator position detection device with excellent workability during installation and maintenance.

[Summary of the invention]

One major point in elevators is how accurately the car can be stopped when it touches the floor. One purpose of detecting the position of the car is to control the landing error between the car floor and the entrance/exit floor of each floor where the car stops to be as small as possible. For this reason, when installing an elevator, positioning is performed for each floor with reference to the car floor and the hall entrance/exit floor to ensure accurate floor landing control. Moreover, the area near the car and the entrance/exit of the landing are relatively easy to work in compared to the spaces between floors in the hoistway.

The present invention has been developed with these points in mind, and its feature is that a position detection device that detects the car position by facing the detector and the detected device is installed on the car floor and on the car floor, respectively. It is located on the opposing side surfaces of the landing entrance/exit floor or on a member provided to extend the side surfaces so as not to protrude beyond these side surfaces.

[Embodiments of the invention]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 3 is a vertical sectional view of an elevator car and hoistway equipped with a position detection device according to an embodiment of the present invention, and FIG. FIG. 5 is an enlarged view of part A inside, and is a front view showing a hall entrance and exit, a hall door, etc. equipped with a position detection device according to the embodiment of FIG. 3. Further, FIGS. 6 to 9 are block diagrams showing specific examples of a detector and a detected part constituting the position detecting device of the present invention.

In FIG. 3, 12 is a car floor frame, 13 is a car door, 14 is a landing door, 15 is a landing sill, and 16 is a door rail. Further, 17 and 18 are a detector and a detected part constituting the position detecting device of the present invention, and the other parts are the same as those in FIG. 1. In this example,
As shown in FIG. 4, a detector 17 is installed in a recess provided in the floor side of the elevator car 1, and when the car 1 reaches a position corresponding to each floor, the floor side of the hall entrance facing the detector 17 ( In the diagram, landing threshold 1
The detected portion 18 is attached to the recess provided in 5). When the installed state of the detected part 18 is viewed from inside the hoistway, it becomes as shown in FIG.

With the above configuration, when the elevator car 1 passes through or stops at the landing entrance of each floor,
The position of the car 11 is detected by opposing the detector 17 provided on the floor side of the car and the detected portion 18 provided on the floor side of the hall entrance/exit. The operation of the detector and the detected part at this time is explained in Section 6 with a concrete example.
This will be explained using FIGS. 9 to 9.

FIG. 6 shows an example of a detector and a detected part used in the position detecting device of the present invention, where 17A is a reed switch and 18A is a permanent magnet. In Figure 6,
When the reed switch 19A approaches the permanent magnet 18A, the contact of the reed switch 17A operates due to the magnetism of the permanent magnet 18A, and this operation signal is transmitted to the power supply 1.
The signal is inputted to the position control circuit 20 provided through the line 9.

FIG. 7 shows another example of the detector and the detected part,
17B is a magnetic sensor, and 18B is a permanent magnet.
In FIG. 7, the magnetic sensor 17B is a permanent magnet 18B.
When facing the permanent magnet 18B, it is operated by the magnetism of the permanent magnet 18B and generates an output signal. Since the power supply 19 supplies stable voltage to each part via the regulator 21, the minute output output from the magnetic sensor 17B is amplified via the amplifier 22, and output as a switching output by the output circuit 23 to the position control circuit. 20 is input.

In FIG. 8, the detector and the detected part are the light receiving element 1.
7C and a light emitting element 18C. In this example, the light receiving element 17C is composed of a phototransistor or the like, and by facing the light emitting element 18C, it collects the light beam from the light emitting element 18C and performs photoelectric exchange. This light reception signal is converted into a switching output by an output circuit 23 via an amplifier 22, and is input to the position control device 20.

In addition, FIG. 9 shows an ultrasonic sensor 17 as a detector.
An example using D is shown below. In this example, when the ultrasonic sensor 17D faces the reflector 18D (or a protrusion) provided on the floor side of the entrance/exit of the landing, the ultrasonic waves emitted from the ultrasonic sensor 17D are reflected to the reflector 18D.
When the reflected wave is reflected by the ultrasonic sensor and is incident on the ultrasonic sensor, an output signal is generated and input to the position control device 20.

In the above explanation, the position control circuit 20 is a circuit necessary for elevator speed control, signal control, etc. It records and calculates the position signal of each floor and the pitch between floors using a microcomputer, and outputs the necessary signals. This controls the elevator.

According to the embodiment shown in FIGS. 3 to 5 above,
Since the detector 17 and the detected part 18 are installed in recesses provided on the floor side of the car and on the floor side of the landing entrance, the position detection device does not protrude into the hoistway, preventing accidents where the signal cable gets caught. At the same time, the hoistway space can be used effectively. Further, since the detected portion 18 is attached to the landing sill 15, it can be installed in the factory when the landing sill is manufactured, and installation work at the installation site is not required.

In addition, in the embodiment shown in FIGS. 3 to 5, the detector is provided in the car and the detected part is provided at the entrance/exit of the hall.
Both may be replaced, in which case the number of cable lines to the elevator car can be reduced.

In addition, as another embodiment of the present invention, if the detected part is provided on the entrance/exit side of the hall with a different configuration for each floor, and the detector is configured to generate different signals corresponding to the configuration of the detected part, It is possible to detect which floor the car is located on. For example, it is conceivable to provide a plurality of sets of detectors and detected parts, and to make the detection signal different for each floor depending on the combination of detected parts.

FIG. 10 shows an embodiment in which four sets of detectors and detected parts are provided, and the detected parts on the hall entrance/exit side are arranged differently for each floor. In this embodiment, four detectors on the car side (not shown) are located at positions facing each group.
When the car reaches the position corresponding to the nth floor in FIG. When it reaches the detected part 1
The detectors corresponding to 8-1, 18-2, and 18-3 are activated. Therefore, by combining the operations of these four detectors, it is possible to detect the floor position as a whole, and it is possible to prevent accidents in which the floor position is unknown, such as when the power is restored.

In addition, if multiple sets of detectors and detected parts are installed in the vertical direction, the car position can be detected continuously. A member provided to extend the apron 24 and a member provided to extend the floor side portion of the landing entrance, namely the toe guard 25.
It is also possible to install it on

〔Effect of the invention〕

According to the present invention, since the position detection device is provided on the floor side of the car or landing entrance or on a member provided to extend the floor side, work during installation and maintenance is easy, and the signal cable is There are no accidents such as getting caught, and there are also fewer restrictions on installation space.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an elevator showing the installation state of a conventional position detection device, FIG. 2 is an enlarged view of the position detection device in FIG. 1, and FIG. Figure 4 is an enlarged view of part A in Figure 3, Figure 5 is a front view of the landing entrance and landing door in Figure 3, and Figures 6 to 9 are longitudinal cross-sectional views of the elevator car and hoistway. 10 is a specific block diagram of a position detecting device applied to the present invention, and FIG. 10 is a front view of a hall entrance and a hall door equipped with a position detecting device according to another embodiment of the present invention. 1...Elevator car, 2...Balance weight,
3... Rope, 4... Sheave, 5... Guide rail, 6... Detector, 7... Detection plate, 8... Arm, 9...
Reed switch, 10... Permanent magnet, 11... Signal cable, 12... Car floor frame, 13... Car door,
14... Landing door, 15... Landing threshold, 16... Door rail, 17... Detector, 18, 18-1, 18-2,
18-3, 18-4...detected part, 17A...reed switch, 18A...permanent magnet, 17B...magnetic sensor, 18B...permanent magnet, 17C...light receiving element, 18
C...Light emitting element, 17D...Ultrasonic sensor, 18D...
Reflector plate, 19... Power supply, 20... Position control circuit, 21
...regulator, 22...amplifier, 23...output circuit, 24...apron, 25...toe guard.

Claims (1)

[Scope of Claims] 1. An elevator car that ascends and descends in an elevator hoistway, a detector is provided in one of the elevator car and the hoistway, and a detected part is provided in the other, and the detector and the detected part are provided in one of the elevator cars and the hoistway. In the device for detecting the position of the car using opposing parts, one of the detector and the detected device is provided on a floor side part of the car or so as to extend the floor side part. Elevator position detection characterized in that the other member is provided on a floor side surface of a landing entrance in the hoistway or on a member provided to extend the floor side surface so as not to protrude from these side surfaces. Device. 2. The elevator position detection device according to claim 1, wherein the detector or the detected part is attached to a recess provided in a side surface of the floor of the car. 3. The elevator position detection device according to claim 1, wherein the detector or the detected part is mounted in a recess provided in a floor side surface of a landing entrance in the hoistway. 4. In claim 1, the detected part is provided on the floor side of the landing entrance with a different configuration for each floor, and the detector outputs different signals corresponding to the configuration of the detected part. An elevator position detection device characterized by comprising: 5. The position detection device for an elevator according to claim 4, wherein the configuration of the detected section is a combination of a plurality of detected sections. 6. The elevator position detection device according to claim 1, wherein the detected portion is a permanent magnet and the detector is magnetically sensitive means. 7. An elevator position detection device according to claim 6, characterized in that the magnetic sensing means is a reed switch. 8. An elevator position detection device according to claim 6, characterized in that the magnetic sensing means is a magnetic sensor. 9. An elevator position detection device according to claim 1, wherein the detected portion is a light emitting element, and the detector is a light receiving element. 10. Elevator position detection according to claim 1, characterized in that the detector is an ultrasonic sensor, and the detected part is a reflector that reflects ultrasonic waves emitted from the ultrasonic sensor. Device.