JP2003040571A - Moving handrail monitoring device for escalator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase a detection accuracy by detecting a moving speed in the state of non-contact with a moving rail. SOLUTION: In this moving handrail monitoring device for an escalator, a serial band-shaped metal plate 10 is installed on the inner surface of a serial handrail belt 12 for the escalator, and holes are provided in the metal plate 10 at least at one position. A detector 17 is disposed near the inner surface of the handrail belt 12, and a variation in magnetic flux density through the hole is detected by forming the already known magnetic field of the magnetic flux density by the detector 17. Based on a time required for detecting a next hole after detecting an initial hole and a hole-to-hole distance, the moving speed of the handrail belt 12 is calculated, and the calculated moving speed is judged whether the speed is within the allowable range of a specified moving speed or not. When the speed is out of the allowable range, the operation of the escalator is stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact moving speed monitoring device for a moving handrail, especially for an escalator.

[0002]

2. Description of the Related Art FIG. 12 shows, for example, JP-A-2-7069.
A conventional abnormality detecting device for a handrail belt of an escalator shown in Japanese Patent No. 1 is shown. As shown in FIG. 12, the escalator is provided with a series of handrail belts 2, and a drive motor (not shown) that conveys the handrail belt 2 and a handrail belt 2 are provided at at least one position of the escalator.
And a handrail belt drive roller 1 that is in contact with the inside of the. Further, a rolling roller 3 is arranged so as to face the handrail belt driving roller 1, and is arranged so as to contact the outer surface of the handrail belt 2. The rolling roller 3 is pivotally supported by a rotary shaft 3a. The rotating shaft 3a is connected to the belt speed detecting means TG _R, the drive control circuit for controlling the driving of the handrail belt 2 based on the output from the belt speed detecting means TG _R (not shown) is provided . Also, the rotating shaft 3
a is supported by a support plate 5 fixed to the support rod 4. The support rod 4 is provided with a coil spring 6 having one end fixed to the stopper 7 and the other end fixed to the bottom of the support plate 5.

Therefore, the abnormality detecting device for the handrail belt is arranged so as to face the handrail belt driving roller 1 by the urging force of the coil spring 6 and to pass the handroll belt 2 through the rolling roller 3.
Rotates while pressing. As a result, the rolling roller 3
Rotates in accordance with the travel of the handrail belt 2, its rotational speed is sent via the rotary shaft 3a to the belt speed detecting means TG _R, the conveying speed of the handrail belt 2 from the rotational speed of the belt speed detecting means TG _R To be detected. And
The drive control circuit, for example, if the conveying speed of the handrail belt 2 is delayed greater than the step for some reason, the rotational speed of the rolling roller 3 is delayed, by which, the output from the belt speed detecting means TG _R When the value becomes equal to or less than the predetermined value, the drive motor that drives the handrail belt 2 can be stopped and the operation of the escalator can be stopped.

[0004]

However, in the conventional handrail belt abnormality detecting device for an escalator, the speed of the handrail belt is indirectly determined based on the rotation speed of the rolling roller that is brought into contact with the front surface or the back surface of the handrail belt. Had been detected.
As described above, when the speed of the handrail belt is detected via the rolling roller, the portion on the circumference of the handrail belt that is in dynamic contact with the rolling roller is recognized as a point, and thus the measured value has an error. It was likely to occur.

Further, in the belt speed detecting means, if the rotary shaft bearing of the rolling roller is worn, the actual conveying speed of the handrail belt may be different from the detected belt speed. In such a case, although the handrail belt is actually traveling normally, the output from the belt speed detecting means becomes a predetermined value or less, and as a result, the operation of the escalator may be unnecessarily stopped.

Further, the surface of both the handrail belt and the rolling roller may become dirty or the surface characteristics may change due to aging, so that the friction coefficient between the rolling roller contact surface and the handrail belt surface may change. There is. In such a case, an error may occur in the detection of the conveyance speed of the handrail belt, and as described above, the operation of the escalator may be stopped due to erroneous measurement, even though the handrail belt is traveling normally.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to improve the accuracy of detecting the conveying speed of a handrail belt, and to detect the conveying speed in a non-contact manner with respect to the handrail belt. An object of the present invention is to provide a moving handrail monitoring device for an escalator, which prevents a speed detection error due to material deterioration due to wear or aging.

[0008]

In order to achieve the above object, a moving handrail monitoring device for an escalator of the present invention has the following features.

(1) At least one detected part provided on the inner surface of the moving handrail for the escalator, and a magnetic field having a known magnetic flux density which is provided near the moving handrail and passes through the detected body. Of the moving handrail based on a detector that detects a change in the magnetic flux density at the time, and a time required for the detector to detect at least two changes in the magnetic flux density and a distance between the detected portions. A moving handrail monitoring device for an escalator, comprising: a speed calculator that calculates a speed; and a determination unit that determines whether or not the moving speed output by the speed calculator is within an allowable range of a predetermined moving speed.

Since the moving speed of the moving handrail is calculated without contacting the moving handrail by detecting the change in the magnetic flux density due to the detected portion in the moving handrail, regardless of the deterioration over time of the moving handrail, the accuracy of the moving handrail is always maintained. High speed measurements can be made. Therefore, by determining whether or not the speed is within the allowable range, the escalator can be safely run or stopped without waste, and the safety is further improved.

(2) In the moving handrail monitoring device for an escalator described in (1) above, when the moving speed of the moving handrail is determined to be outside a predetermined speed allowable range, the operation of the moving handrail is stopped. It is a moving handrail monitoring device for an escalator, which has a stopping means for making it.

When the moving speed is out of the permissible range of the predetermined speed, for example, when the moving speed of the moving handrail is not linked with the moving speed of the step, there is a possibility that the user of the escalator may be inconvenient to carry , It is necessary to stop the operation of the escalator. With the above device configuration, since there is no erroneous measurement of the moving speed as compared with the related art, the operation of the escalator can be stopped safely without waste.

(3) In the moving handrail monitoring device for an escalator according to the above (1) or (2), the detected portion may be a metal piece arranged on the inner surface of the moving handrail or the entire inner surface of the moving handrail. It is a moving handrail monitoring device for an escalator, which is one of the holes provided in the mounted metal plate.

By disposing the metal piece on the inner surface of the moving handrail, the degree of change in the magnetic flux density is different between the metal piece portion and the other portion in the magnetic field having a predetermined magnetic flux density. Similarly, by making a hole in the metal plate attached to the inner surface of the moving handrail, the metal plate portion and the hole portion,
In a magnetic field having a predetermined magnetic flux density, the degree of change in the magnetic flux density is different. Therefore, the degree of change in the magnetic flux density is measured, and the moving handrail is determined based on the time interval of the change in the magnetic flux density and the distance between the arranged metal pieces or the distance between the holes formed in the metal plate. The moving speed of can be calculated. Furthermore, in the existing moving handrail, for example, when replacing the moving handrail, it is easy to embed a metal piece on the inner surface of the moving handrail or to form a hole in a series of metal plates mounted in the series of moving handrails. The moving speed of the moving handrail can be calculated with high accuracy.

(4) In the moving handrail monitoring device for an escalator according to the above (1) or (2), the detected part and the detector are provided on the side of the left and right moving handrails of the escalator, respectively. It is a monitoring device.

If the speeds of the left and right moving handrails of the elevator are different, there is a possibility that, for example, the transportation of a user who is gripped by the two moving handrails may be inconvenient.
A problem may occur during transportation of a plurality of users who are respectively gripped by the left and right moving handrails. Therefore, as described above, by detecting the moving speeds of the left and right moving handrails of the escalator, the operation of the escalator can be safely stopped when the moving speeds of the two moving handrails are different.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below.

FIG. 1 is a side view showing a path of a handrail belt 12 which is a moving handrail of an escalator. As shown in FIG. 1, at least one detector 17 for detecting the moving speed of the handrail belt 12 is arranged at a portion corresponding to the return path in the path of the handrail belt 12.

Further, FIG. 2 shows a sectional view taken along the line AA of FIG. As shown in FIG. 2, a series of handrail belts 12
An endless band-shaped metal plate 10 is attached to the entire inner surface of the, and is near the inner surface of the handrail belt 12,
A detector 17 is arranged on the handrail belt return side rail. In the present embodiment, the metal plate 10 is preferably an endless steel strip, for example.

Further, as shown in FIG. 3, the metal plate 10 is provided with at least one hole 10a. On the other hand, the detector 17 forms a magnetic field with a known magnetic flux density with respect to the metal plate 10 mounted on the inner surface of the handrail belt 12, and when the metal plate 10 passes with the handrail belt 12, a hole is formed. The change in the magnetic flux density when passing 10a is detected.

Hereinafter, in the present embodiment, the hole 10 will be described.
A will be described in more detail, taking as an example the case where one is provided in the series of strip-shaped metal plates 10. While the metal plate 10 is a magnetic body, air is present in the hole 10a portion and this portion is not a magnetic body. Therefore, as shown in FIG. 3, in the detector 17, the detected value of the magnetic flux density when the metal plate 10 passes and the value when the metal plate 10 moves in the direction of the arrow when the handrail belt moves in the direction of the arrow 10a. It is different from the detected value of magnetic flux density. Thereby, based on the detection value of the detector 17, the hole 1
0a can be detected at the time of passage, and the initial hole 10a
The time from detection to detection of the next hole 10a can be calculated. Furthermore, since the distance from the hole 10a to the next hole corresponds to the entire length of the series of metal plates 10 and is known, the detection time (cycle) t from the detection of the initial hole 10a to the detection of the next hole 10a and the metal plate 10 The moving speed v of the handrail belt can be calculated from the total length S using the following formula (1).

[0022]

## EQU1 ## v = S / t (1) In the formula, v: handrail belt revolution speed [m / sec], S: total length of a series of metal plates 10 [m], t: initial hole 10a detection Detection time [sec] until detection of the next hole 10a, t = t _n −t _(n−1) .

An example of the configuration of the detector 17 used in this embodiment will be described with reference to FIGS.

As shown in FIG. 4, the detector 17 forms a magnetic field with respect to the metal plate 10 and detects the change in the magnetic flux density at the frequency.
2 and a trigger circuit having a transistor 24,
The output from the detector 17 is sent to the amplifier 26 as described later.

In the detector 17, as shown in the following equation (2), the current value L changes as the metal plate 10 approaches, while the electric capacitance C is constant, so that the frequency f of the pulse signal is Detect changes in.

[0026]

[Formula 2] f∝LC (2) Further, the pulse signal output from the detector 17 is sent to the CPU 14 (FIG. 10) described later, and based on the frequency f obtained by the equation (2). , Period T is calculated by 1 / f.

[0027] Upon further detail, as shown in FIG. 5 (a), if the hole 10a is provided in the metal plate 10, the frequency of the pulse signal detected at the detector 17 is f _1, at that time The period T ₁ = 1 / f ₁ . On the other hand, since the metal plate 10 is a magnetic material, it has a change in magnetic flux density different from that of the hole 10a, and as shown in FIG.
The frequency of the pulse signal detected in 7 is f ₂ , and the cycle T _{2 at} that time is 1 / f ₂ .

Then, as shown in FIG.
When measured, the hole 10a and the metal plate 10 have a cycle
T₁, T_TwoIs seen. Measure this cycle change over time
Then, as shown in FIG._Two~ T₁Or T₁~
T_TwoIt changes with time. Therefore, in the present embodiment, T_Two~
T₁The time when it changes to_Two~ T ₁
To next detection T_Two~ T₁Cycle T up to_ThreeMeasure this
Cycle T_ThreeBy substituting [sec] into t in equation (1),
Thus, the handrail belt circulating speed v can be obtained.

When changing from T _{2 to} T ₁ in FIG. 7, it is possible to detect the changing time by predetermining a threshold value for the inclination from T _{2 to} T ₁ , for example.

The configuration of another example of the detector used in this embodiment will be described with reference to FIGS. 8 to 9. The other detector 37 is also installed in the return rail of the handrail belt near the inside of the handrail belt.

As shown in FIG. 8, the detector 37 forms a magnetic field on the metal plate 10 and detects the change of the magnetic flux density by the voltage change. Therefore, the detector 37 has an S pole along the moving direction of the handrail belt. The coil 32 having the magnet 32 having the N pole and the coil 34 arranged at the central protrusion of the magnet 32.
One end of 4 is grounded, and the other end is amplifier 36 as described later.
It is connected to the.

The detector 37 forms magnetic force lines 30 (shown by wavy lines) as shown in FIG. 8 in the hole 10a, and detects the leakage magnetic flux at this time by converting it into a voltage. on the other hand,
Since the metal plate 10 is a magnetic body, the leakage magnetic flux is not detected. Therefore, by measuring the voltage change over time, it is possible to obtain an analog signal in which the voltage changes when the hole 10a passes, as shown in the upper graph of FIG. Further, in the CPU 14 (FIG. 10) described later, a threshold value for the rising slope of the analog signal shown in the upper graph of FIG. 9 is set in advance to obtain a digital signal as shown in the lower graph of FIG. Then, based on the lower graph of FIG. 9, the period T between detection of the leakage magnetic flux by the hole 10a can be obtained.

In such a case as well, similarly to the above, t in the equation (1) is satisfied.
By substituting the period T into the above, the handrail belt circulation speed v can be obtained.

In the present embodiment, the handrail belt 12
Although a series of strip-shaped metal plates 10 are attached to the inside of the metal plate 10 and one hole 10a is formed in the metal plate 10 has been described as an example, the present invention is not limited to this, and the metal plate 10 has two hole holes. May be formed. In such a case, the handrail belt revolution speed v can be calculated by using the distance L between the two holes instead of S in the above equation (1). Similarly, the handrail belt revolution speed v can be calculated by providing holes at two or more places.

Further, in the above embodiment, an example in which the series of strip-shaped metal plates 10 are mounted on the entire circumference of the series of handrail belts 12 has been described, but the present invention is not limited to this, and at least one of the handrail belts 12 is provided. By mounting a metal piece, which is a magnetic material, such as a steel piece, at the location, and detecting the change in the magnetic flux density due to the steel piece with the detectors 17 and 37, the distance between the steel pieces and the detection time (cycle) between them.
Then, the handrail belt revolution speed v can be calculated from these by applying the above equation (1). Further, by mounting two or more steel pieces and using the distance L ′ between the steel pieces instead of S in (1) above, the handrail belt revolution speed can be obtained in the same manner as above.

Next, FIG. 10 shows an outline of the configuration of the moving handrail monitoring device for an escalator according to the present embodiment. As shown in FIG. 10, either one of the detectors 17 or 37 described above forms a pair and is arranged near the inner surfaces of the left and right handrail belts. Then, the signal of the frequency f or the voltage V from the detectors 17 and 37 is sent to the amplifier 26 or 36, amplified and sent to the CPU 14 via the interface 13. In the CPU 14, the transmitted frequency f or voltage V
Is measured over time, and as described above, the cycle T ₃ or T is substituted for t in the above equation (1) to obtain the handrail belt circulation speed v. Further, the allowable range of the predetermined moving speed is set in advance in the CPU 14, so that the calculated handrail belt revolution speed v is within the allowable range of the predetermined moving speed in the CPU 14, as shown in FIG. 11. It is determined whether or not (S100), and if the handrail belt circulation speed v is within the allowable range, the operation of the escalator is continued (S10).
2). On the other hand, when it is determined that the handrail belt circulation speed v is out of the allowable range, the CPU 14 transmits an operation stop signal to the escalator control panel 15 to stop the operation of the escalator (S104), and the escalator control panel 15 is stopped. If there is a remote management system that is separate from the escalator, 15 is a remote transfer notification 1 to the remote management system.
6. As a result, the operation of the escalator can be stopped safely without waste even by remote management.

Further, in the present embodiment, the left and right handrail belt circling speeds v are obtained from the CPU 14, the moving speeds of the left and right handrail belts are compared, and it is determined whether or not this comparison value is within the allowable range, and When it goes out of the range, the left and right handrail belts are obviously deviated from each other in running, so that the elevator can be stopped as described above.

[0038]

As described above, according to the moving handrail monitoring device for an escalator of the present invention, since the moving speed can be detected without contacting the moving handrail, the moving speed can always be detected accurately. As a result, useless stoppage of the operation of the escalator due to erroneous measurement can be suppressed as compared with the related art, and the escalator can be operated safely.

[Brief description of drawings]

FIG. 1 is a side view illustrating an example of the arrangement of detectors of a moving handrail monitoring device for an escalator according to the present invention.

2 is a perspective view including an AA cross section of FIG. 1. FIG.

FIG. 3 is a diagram illustrating a configuration of a metal plate according to the present invention.

FIG. 4 is a diagram showing a schematic configuration of an example of a detector in the present invention.

5 is a metal plate portion using the detector shown in FIG. 4 (see FIG.
It is a figure explaining the frequency change of a (b)) and a hole part (Fig.5 (a)).

FIG. 6 is a diagram illustrating an example of a signal when the frequency change shown in FIG. 5 is converted into a period change.

FIG. 7 is a diagram illustrating detection of a cycle T ₃ from initial hole detection to next hole detection based on a cycle change measured over time.

FIG. 8 is a diagram showing a schematic configuration of another example of the detector in the present invention.

9 is a diagram illustrating detection of a cycle T from initial hole detection to next hole detection when the detector shown in FIG. 8 is used.

FIG. 10 is a block diagram illustrating an outline of a configuration of a moving handrail monitoring device for an escalator according to the present invention.

FIG. 11 is a flowchart illustrating an operation of stopping the operation of the escalator of the moving handrail monitoring device for the escalator according to the present invention.

FIG. 12 is a diagram showing a configuration of a conventional handrail belt abnormality detection device.

[Explanation of symbols]

10 metal plate, 10a hole, 12 handrail belt, 13
Interface, 14 CPU, 15 escalator control panel, 16 remote transfer, 17, 37 detector, 20,
34 coils, 22 capacitors, 24 transistors, 26, 36 amplifiers, 30 magnetic lines of force, 32 magnets.

Claims (4)

[Claims] 1. A detection part provided at least on the inner surface of a moving handrail for an escalator, and a magnetic field having a known magnetic flux density, which is provided in the vicinity of the moving handrail and passes through the detection target. Detecting a change in the magnetic flux density of the moving handrail based on a time required for the detector to detect at least two changes in the magnetic flux density and a distance between the detected portions. A moving handrail monitoring device for an escalator, comprising: a speed calculator for calculating the moving speed; and a determining unit for determining whether or not the moving speed output by the speed calculating unit is within an allowable range of a predetermined moving speed. 2. The moving handrail monitoring device for an escalator according to claim 1, further comprising: a stop for stopping the operation of the moving handrail when it is determined that the moving speed of the moving handrail is outside a permissible range of a predetermined speed. A moving handrail monitoring device for an escalator, characterized by comprising means. 3. The moving handrail monitoring device for an escalator according to claim 1, wherein the detected portion is attached to a metal piece arranged on an inner surface of the moving handrail or an entire inner surface of the moving handrail. A moving handrail monitoring device for an escalator, characterized in that it is one of the holes provided in the metal plate. 4. The escalator moving handrail monitoring device according to claim 1, wherein the detected part and the detector are provided on the left and right moving handrail sides of the escalator, respectively. Mobile handrail monitoring device.