JP3091369B2 - Brake abnormality detection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake abnormality detecting device for monitoring the operation state of a brake for braking a moving body such as an escalator and automatically calculating a brake adjustment amount.

[0002]

2. Description of the Related Art Conventionally, it is possible to detect that a brake is abnormal, but in the event of an abnormality, a maintenance worker starts and stops the escalator again, measures the braking distance, and adjusts the brake in order to adjust the brake. The amount was estimated from the braking distance and adjusted.

A conventional brake abnormality detecting device will be described with reference to FIGS. FIG. 2 and FIG.
FIG. 1 is a diagram showing a configuration of a conventional brake abnormality detection device disclosed in Japanese Patent Application Laid-Open No. 59-57881, for example.

In FIG. 2, 1 is an escalator, 2 is a step chain of the escalator 1, 3 is a driving sprocket that drives the step chain 2, 4 is a speed reducer that drives the driving sprocket 3 via a drive chain 5, and 6 is a speed reducer. This is a prime mover composed of an electric motor that drives the motor 4 via the shaft 7.

In FIG. 1, reference numeral 8 denotes a brake attached to the shaft 7, which brakes the shaft 7 when the brake coil 8a is deenergized, and brakes the shaft 7 when the brake coil 8a is energized. Is to solve. R, S, T are electric motors 6
And a three-phase power supply for supplying power to the brake coil 8a.

Further, in the figure, reference numerals 13a and 13b denote normally open contacts of the ascending operation contactor 13, respectively, for connecting the electric motor 6 and the brake coil 8a to the power sources R and S. 13e is a normally closed contact of the ascending operation contactor 13, 15
Reference numerals a and 15b denote normally open contacts of the descending operation contactor, respectively, for reversing the phases and connecting the electric motor 6 and the brake coil 8a to the power sources R and S. 15e is a normally closed contact of the descending operation contactor 15.

Further, in the figure, reference numeral 16 denotes a disk which is attached to the end of the shaft 7 and whose circumference is cut off at a predetermined interval and formed in a sawtooth shape, and 16a denotes a pulse corresponding to the sawtooth of the disk 16. A pulse generating means for generating a signal, a reset button 17 which is always opened and outputs a low level signal, and which is closed when pressed to output a high level signal, and a NOT 18 which inverts the signal of the reset button 17 The element 19 is an AND element that outputs a high level signal when both of the normally closed contacts 13e and 15e are closed and outputs a high level, and the NOT element 18 also outputs a high level.

Further, in FIG. 1, reference numeral 20 denotes a pulse generating means 1 when the AND element 19 outputs a high level.
A counter that counts the pulse of 6a and measures the deceleration distance, 21 is a stop detection unit that outputs a high level when the pulse generation interval from the pulse generation unit 16a becomes a predetermined value or more, and 21A is a stop with the AND element 19 An AND element that outputs a high-level signal when both of the detection units 21 output a high level.

The normally closed contacts 13e, 15e, pulse generating means 16a, AND element 19, counter 20, stop detecting means 21 and AND element 21A are deceleration value measuring means 21.
B is configured to count pulse signals after the brake 8 is actuated and measure the deceleration distance from the number of pulse signals when the brake 8 stops.

Further, in FIG.
Is a reference signal generating means that stores a reference distance from when the escalator 1 stops until the escalator 1 stops for each load of the escalator, and outputs a reference signal corresponding to the load according to a signal of the load detecting means 22a. 23 is a comparing means for comparing the deceleration distance signal of the counter 20 with the reference signal of the reference signal generating means 22 when the AND element 21A outputs a high level, and outputting a high level signal when the former is larger than the other. Numeral 24 is a storage means for storing the high level of the comparison means 23, and 25 is a transmitting means which is activated when the storage means 24 stores the high level.

In FIG. 3, + and-are control power supplies, 10 is a stop switch having one end connected to the control power supply +, 11 is a safety switch having one end connected to the other end of the stop switch 10, and 12 is always open. A lifting operation button that is pressed and closed when the escalator 1 is driven in the ascending direction;
3 is energized by closing the ascending operation button 12 and the motor 6
Is an ascending operation contactor for rotating in the ascending direction.

In FIG. 1, reference numeral 13c denotes a normally open contact of the ascending operation contactor 13 connected in parallel to the ascending operation button 12, 13d a normally closed contact of the ascending operation contactor 13, 14 is normally open, and the escalator is open. A down operation button 15 is pressed and closed when the 1 is operated in the down direction, and a down operation contactor 15 is urged by closing the down operation button 14 to rotate the motor 6 in the down direction. 15c is a down operation button 14
Normally open contact of the descending contactor 15 connected in parallel to
d is a normally closed contact of the descending operation contactor 15. 25a is a normally closed contact of the transmitting means 25.

According to the conventional brake abnormality detecting device, each time the escalator 1 is stopped, the deceleration distance is measured and compared with the reference distance. If the braking of the brake 8 is weak and the former becomes greater than the latter, the transmitting means is used. The escalator 1 is stopped at a predetermined distance even in an emergency, since the brake 8 is adjusted without waiting for the periodic inspection because the escalator 25 is urged to prevent the subsequent operation of the escalator 1. Can be.

Further, since a signal is output from the reference signal generating means 22 in accordance with the signal of the load detecting means 22a,
Even if an emergency stop occurs while a person is riding on the escalator 1, an abnormality of the brake 8 can be detected.

[0015]

In the conventional brake abnormality detecting device as described above, in a daily moving state,
Each time the escalator 1 stops, the brake 8 is checked for abnormality, and if there is an abnormality, the restart of the escalator 1 is prevented. However, in the event of an abnormality, the maintenance staff releases the inhibition of restart of the escalator 1, starts and stops the escalator 1 once, measures the braking distance, and converts the measured braking distance into a brake adjustment amount (estimated). Then, after the brake 8 is adjusted, it is necessary to start and stop again to check whether the braking distance is within the reference value. Of this work,
Since the estimation of the brake adjustment amount is performed based on the experience of the maintenance staff, the maintenance staff with insufficient experience may repeat the adjustment work, and there is a problem that the load of the adjustment work is large.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to provide a brake abnormality detecting device capable of performing accurate brake adjustment in a short time.

[0017]

According to a first aspect of the present invention, there is provided a brake abnormality detecting device for driving an escalator.
Split the brake on the brake wheel attached to the shaft
Brake means for performing a braking operation by pressing with braking,
Each time the escalator is stopped by the brake means , a stop detection signal is output, and a deceleration value measuring means for measuring a deceleration distance, and a reference distance from when the brake means is operated to when the escalator is stopped are set .
Reference signal generating means for storing for each scalator load ;
The stop detection signal is input from the deceleration value measuring means.
When the deceleration distance from the deceleration value measuring means and the reference signal
A comparison means for comparing the reference distance from the signal generation means with a reference distance, wherein when the braking of the brake means is weak and the deceleration distance is equal to or longer than the reference distance, the operation of the escalator thereafter is prevented. In the abnormality detection device, when a stop detection signal is input from the deceleration value measurement unit, the deceleration distance from the deceleration value measurement unit and the reference
Set the reference distance from the signal generator to each braking torque
｛(Braking torque of reference distance)-(control of deceleration distance)
Dynamic torque)｝ / ｛(Spring constant of spring) × (Bray
(Coefficient of friction of key) x (radius of brake wheel)｝
Adjusting amount calculating means for calculating a spring pressing amount of the brake means; and the calculated spring pressing.
And an output device for displaying the measured amount .

[0018]

[0019]

[0020]

In the brake abnormality detecting device according to the first aspect of the present invention, the device is attached to a shaft for driving an escalator.
Press the brake on the brake wheel
Braking means for performing a braking operation by applying
Stop detection every time the escalator is stopped by means
Outputs the output signal, and a deceleration value measuring means for measuring the deceleration distance, the Es from the brake means is activated
Escalator the reference distance until the calator stops
A reference signal generating means for storing the each load, the reduction value meter
When the stop detection signal is input from the measuring means,
The deceleration distance from the speed measurement means and the reference signal generation means
A comparison means for comparing the reference distance with the reference distance, wherein if the braking of the brake means is weak and the deceleration distance is equal to or longer than the reference distance, the brake escalator is prevented from operating thereafter. in, when the stop detection signal from the deceleration value measuring means is input, the reduced
Deceleration distance from speed measurement means and reference signal generation means
Is converted to the respective braking torque,
｛(Braking torque at reference distance)-(braking torque at deceleration distance)
H)｝ / ｛(spring constant of spring) x (friction of brake
Friction coefficient) × (radius of brake wheel)｝
Adjusting amount calculating means for calculating the spring pushing amount of the rake means, and the calculated spring pushing amount
Since the output device for displaying is provided, the brake adjustment can be performed without performing the work for estimating the adjustment amount.

[0021]

[0022]

[0023]

【Example】

Embodiment 1 FIG. One embodiment of the present invention will be described with reference to FIG. FIG. 1 is a diagram showing a configuration of a first embodiment of the present invention. In the drawings, the same reference numerals indicate the same or corresponding parts.

In FIG. 1, the escalator 1 to the comparing means 23 are the same as in the conventional example, and the description is omitted. 30 is an adjustment amount calculating means such as a CPU, and 31 is a storage means 2 of a conventional example.
4 is a storage device having a feature of storing the adjustment amount calculated by the adjustment amount calculating means 30. 32 is a storage device having the characteristics of the transmitting means 25 of the conventional example and the adjustment amount stored in the storage device 31. This is an output device that has features to be displayed.

Although not shown, the inverted T
The character-shaped brake device performs a braking operation by being pressed against a brake wheel by a spring.

For example, when the escalator 1 is stopped for some reason, the adjustment amount calculating means 30
When the stop detection signal H is input from the ND element 21A,
Using the deceleration value sent from the counter 20 and the reference deceleration value from the reference signal generating means 22, each is converted into a braking torque value, and the difference between the braking torque of the reference deceleration value and the braking torque of the deceleration value is calculated. . Next, the difference between the determined braking torques is converted into a mechanical dimension for adjusting the braking torque of the brake.

For example, in the case of the brake 8 having a structure in which the braking torque of the brake is secured by a spring, the adjustment amount (spring pushing amount) is calculated by the following equation.

Brake adjustment amount = {(braking torque of reference deceleration value)-(braking torque of deceleration value)} / {(spring constant of spring) × (friction coefficient of brake) × (radius of brake wheel)}

The storage device 31 stores the adjustment amount calculated by the adjustment amount calculation means 30 in addition to the operation of the storage means 24 of the conventional example. The output device 32 displays the adjustment amount stored in the storage device 31 in addition to the operation of the transmission unit 25 in the conventional example.

According to the first embodiment, the escalator 1
If the person stops the escalator 1 irrespective of the load on the vehicle, the adjustment amount calculating means 30 automatically calculates the adjustment amount of the brake 8, the adjustment amount is stored in the storage device 31, and the adjustment amount is stored in the output device 32. Is displayed. Therefore, the maintenance staff can adjust the brake 8 based on the adjustment amount displayed on the output device 32 at the time of the escalator inspection, and perform the operations (start, stop, and braking distance of the escalator) that were conventionally performed for estimating the adjustment amount. , And the brake adjustment can be accurately performed in a short time without performing the estimation of the adjustment amount.

[0031]

As described above, the abnormality detecting device for a brake according to the first aspect of the present invention employs an escalator.
A brake on the brake wheel attached to the driving shaft
Brake that presses against the spring to perform a braking operation
Means, a stop detection signal is output each time the escalator is stopped by the brake means , and a deceleration value measuring means for measuring a deceleration distance; and a reference distance from when the brake means operates until the escalator stops. a reference signal generating means for storing for each escalator load, the stop detection signal from the deceleration value measuring means input
When force, deceleration distance before from the reduction value measuring means
Serial and a comparison means for comparing the reference distance from the reference signal generating means, said speed reduction distance braking weak braking means subsequent if more than the reference distance the escalation
In the brake abnormality detection device configured to prevent the operation of the vehicle, when a stop detection signal is input from the deceleration value measurement unit, the deceleration distance from the deceleration value measurement unit and
Each reference distance from the reference signal generating means is
Convert to torque, ｛(braking torque at reference distance)-(deceleration
Distance braking torque)｝ / ｛(spring constant of spring) ×
(Brake friction coefficient) x (half of the brake wheel
Press the spring of the brake means according to the diameter
Adjusting amount calculating means for calculating the amount, and the calculated split
Output device that displays the pushing amount of the
There is an effect that the brake adjustment can be performed without performing the work performed for estimating the adjustment amount.

[0032]

[0033]

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a first embodiment of the present invention.

FIG. 2 is a diagram illustrating a configuration of a conventional brake abnormality detection device.

FIG. 3 is a diagram showing an operation circuit of a conventional escalator.

[Explanation of symbols]

1 escalator, 8 brake, 16a pulse generation means, 17 reset button, 18 NOT element, 1
9 AND element, 20 counter, 21 stop detecting means, 21A AND element, 22 reference signal generating means, 2
3 comparison means, 30 adjustment amount calculation means, 31 storage device, 32 output device.

Continuation of the front page (56) References JP-A-55-97534 (JP, A) JP-A-59-57881 (JP, A) JP-A-4-85288 (JP, A) JP-A-52-86681 (JP, A) JP-A-60-242193 (JP, A) JP-A-61-62378 (JP, A) JP-A-54-71893 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB Name) F16D 66/00 B66B 29/00

Claims (1)

(57) [Claims] 1. Attaching to a shaft for driving an escalator
Press the brake on the brake wheel
A braking means for performing a braking operation, outputting a stop detection signal each time the escalator is stopped by the braking means , and a deceleration value measuring means for measuring a deceleration distance; and The stop detection signal is input from the reference signal generating means for storing a reference distance until the escalator stops at each load of the escalator, and the deceleration value measuring means.
When the deceleration distance from the deceleration value measuring means and the reference signal
No. and a comparison means for comparing the reference distance from the generating means, said brake the deceleration distance braking weak braking means which is adapted to prevent the operation of subsequent said escalator if more than the reference distance In the abnormality detecting device, when a stop detection signal is input from the deceleration value measuring means, the deceleration distance from the deceleration value measuring means and the reference signal
Change the reference distance from the signal generation means to each braking torque
In other words, Δ (braking torque at reference distance) − (braking at deceleration distance)
Torque)｝ / ｛(spring constant) × (brake
Coefficient of friction) x (radius of brake wheel) 前
Adjusting amount calculating means for calculating the spring pressing amount of the brake means; and an output for displaying the calculated spring pressing amount.
Abnormality detection device of the brake, characterized in that a device.