JPH0367881A - Position detection device of elevator - Google Patents

Abstract

PURPOSE:To eliminate a step difference between a cage floor and a story floor, when the cage arrives at the floor, so as to prevent a false step of utilizers by providing a position detecting plate, mounted to a guide rail, and a position detector which is mounted to the cage to generate a cage position signal. CONSTITUTION:In a position detecting plate 15 which is fixed to a guide rail 4, arranged corresponding to a position of a story floor 2 and mounted movably in a vertical direction, a single and pulrality of holes 15a to 15e along the vertical direction are arranged to respectively perform the detection of a floor- arrival reference position by the first row hole 15a, door-open possible section by the second row hole 15b and a cage position by the third to fifth holes 15c to 15e. A position detector 16, mounted to a frame of a cage 6, is constituted of a light projecting part for projecting light in a horizontal direction, light receiving part for receiving the light, signal converting part for generating voltage as a signal when the light is not received, amplifying part for amplifying the voltage to be output and a power supply part for giving power to each part so as to place the position detecting plate 15 between the light projecting part and the light receiving part.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for detecting the position of an elevator car.

[Prior Art] Fig. 7 to Fig. 9 are diagrams showing a conventional elevator position detection device disclosed in, for example, Japanese Patent Publication No. 51-42824, and Fig. 7 shows a vertical cross section of a machine room and a hoistway. FIG. 8 is a plan view showing the engaged state of the guide plate and the position detector, and FIG. 9 is a perspective view of the guide plate.

In the figure, (1) is the hoistway, (2) is the floor, (3) is the machine room, (4) is the guide rail installed in the hoistway (1), (
5) is a guide plate fixed to the guide rail (4) and attached corresponding to the floor (2) position, and is made up of three iron plates arranged in parallel with each other along the vertical direction. (6) is the car guided by the guide rail (4), and (7) is attached to the car frame (8) that supports the car (6) and magnetically engages with the guide plate (6) to detect it. (9) is the machine room (
a hoist installed in (3) for raising and lowering the car (6);
) is the electric motor that drives the hoisting machine (9), (11) is the speed detector that detects the rotation speed of the electric motor (]0), and (12) is the control panel, which includes the landing device (7) and the speed detector. An arithmetic processing unit (11) that detects the car position by inputting signals from
3) is provided.

A conventional elevator position detection device is constructed as described above, and when the hoist (9) is driven by the electric motor (10), the car (6) moves up and down. As the car (6) moves, the landing device (7) engages with the guide plate (5) and detects this magnetically.
6) is further moved, and this is calculated on the control panel (
12) is processed by the arithmetic processing unit (13) to detect the car position.

[Problem to be solved by the invention] In the conventional elevator position detection device as described above,
Since the moving distance of the car (6) is indirectly determined by the speed detector (11), an error occurs between the moving distance of the car (6) and the signal of the speed detector (10), and the actual An error occurs between the car (6) position and the car position detected from the speed detector (11).
) When the user lands on the floor (2), a step appears between the car floor and the floor (2), which poses a problem in that the user may trip.

This invention was made to solve the above problems, and it is possible to detect the exact position of the car and eliminate the step between the car floor and the floor when landing on the floor, thereby preventing the user from stumbling. An object of the present invention is to provide an elevator position detection device as described above.

[Means for Solving the Problems] An elevator position detection device according to the present invention includes a position detection plate having a plurality of rows of holes mounted on a guide rail, and a position where the holes of the position detection plate are optically detected. The detector is attached to a cage.

[Function] In this invention, since the hole in the position detection plate attached to the guide rail is detected by the position detector attached to the car, the car position can be determined without going through the signal from the speed detector. Detected in the fastened position.

[Example] Figures 1 to 6 are diagrams showing an example of the present invention.
The figure is a longitudinal sectional view of the machine room and hoistway, Figure 2 is a plan view showing the engagement state of the position detection plate and the position detector, Figure 3 is a perspective view of the position detection plate, and Figure 4 is the position detection plate. 5 is a perspective view of the position detector portion, and FIG. 6 is a block diagram of the position detector. Portions similar to those of the conventional device are designated by the same reference numerals.

In the figure, (15) is fixed to the guide rail (4) and the floor (
2) It is arranged corresponding to the position of 2) and moves downward.
The position detection plate attached to the head is arranged in multiple rows of single and plural holes (15a) to (15e) along the vertical direction, and the holes (15a) in the first row indicate the reference position of landing, and hole (1
5b) shows the section where the door can be opened by opening the holes in the 3rd to 5th rows (15c).
) to (15a) are for detecting the car position, respectively. (16) Light projecting unit (17) that projects light in the horizontal direction using a position detector attached to the basket frame (8)
, a light receiving section (18) that receives the above-mentioned light beam, and a light receiving section (1
a signal converter (19) that is connected to 8) and generates a voltage as a signal when the light receiver (18) does not receive the light beam;
, an amplifier section (20) that amplifies and outputs this signal, and a power supply section (21) that supplies power to each section (17) to (20).
) consists of a light emitter (17) and a light receiver (18).
The position detection plate (15) is configured to fit between the two.

In the position detection M position of the elevator configured as described above, the car (6) moves and the position detection plate is placed between the light emitting part (17) and the light receiving part (18) of the position detector (16). (]
5), the light beam from the light projecting section (17) is blocked and the light receiving section (17) does not receive this light beam.

Now, a signal is output from the signal converter (19), amplified by the amplifier (20), and output to the arithmetic processing unit (13) of the control ff1 (12).

Next, the basket (6) moves further, and the holes (15a) in the first and second rows of the light projector (17) and the position detection plate (15) (
15b) engages, and the light beam enters the hole (15a) (15b)
When the light passes through the light receiving section (18) and is received by the signal converting section (
19) will no longer generate voltage. When a signal indicating that this voltage is not generated is input to the arithmetic processing unit (13), it is detected that the car (6) is at the landing reference position or in the section where the door can be opened.

In addition, the position detection plate (
15), the car position is detected by detecting the holes (15c) to (15e) in the third to fifth rows. for example,
After the car (6) is lowered and the position detector (16) engages with the upper end of the position detection plate (15), the third row of light receiving sections (18
) is set by the program of the arithmetic processing unit (13) as the position of the car (6) at this point. Next, the basket (6) descends and the fourth row of light receiving sections (18
) receives the light beam that passes through the fourth row of holes (15d), the calculation processing unit (12) processes the car (6) at a position moved by the distance Q between the operating points from the distance position. .

By repeating this in sequence, the position of the car (6) is detected.

[Effects of the Invention] As explained above, in this invention, the hole in the position detection plate attached to the guide rail is detected by the position detector attached to the car, so the car position is detected in absolute position. It is possible to detect the car position with high accuracy and has the effect of preventing users from stumbling due to landing errors. Furthermore, only one row of position detection plates needs to be mounted on the guide rail, which has the effect of shortening the installation process and reducing material costs.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view of a machine room and a hoistway showing an embodiment of an elevator position detection device according to the present invention, and Fig. 2 shows an engaged state of the position detection plate and the position detector in the construction drawing. A plan view, FIG. 3 is a perspective view of the position detection plate in FIG. 1, FIG. 4 is a front view of the position detection plate in FIG. 3, and FIG. Fig. 6 is a block diagram of the position detector shown in Fig. 5, Fig. 7 is a vertical sectional view of the machine room and hoistway showing a conventional elevator position detection device, and Fig. 8 shows the guide plate and its position in Fig. 7. A flat curved view showing the engaged state of the detector, Fig. 9 is the 7th
FIG. 3 is a perspective view of the guide plate shown in FIG. In the figure, (1) is the hoistway, (2) is the floor, (4) is the guide rail, (6) is the cage, (I5) is the position detection plate, (],
5a)-(15e) are holes, and (16) is a position detector. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] A position detection plate having a plurality of rows of holes arranged along the vertical direction is attached to a guide rail erected in the hoistway, each corresponding to a floor position, and a position detection plate is attached to a car going up and down the hoistway. A position detection device for an elevator, comprising a position detector that optically detects the hole when facing the hole of the position detection plate and issues a car position signal.