JPH03146882A - Method and device for confirming operating characteristic of electromagnetic braking device - Google Patents

Abstract

PURPOSE:To easily and quantitatively confirm the operation characteristic of an electromagnetic braking device by detecting an operating current to operate the electromagnetic device, and detecting the quantity of displacement of a plunger reacting according to the operating current. CONSTITUTION:The operating current to operate the electromagnetic device 7 is detected with a current detecting means 31, and a current signal is outputted. The quantity of displacement of th plunger 10 in the electromagnetic device 4 reacting according to the operating current is detected with a displacement detecting means 15, and a displacement signal is outputted. Also, those current signal and displacement signal are recorded on the same time series with a recorder 22. In such a state, the relation of the current signal with the displacement signal is found based on a recorded result on the recorder 22, and comparison with a reference value set in advance is performed, thereby, the normal/defective condition of the operating characteristic of the electromagnetic braking device 1 can be judged. In such a way, it is possible to easily and quantitatively confirm the operating characteristic of the electromagnetic braking device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for checking operating characteristics of an electromagnetic brake device for an elevator, and an operating characteristics checking device used to carry out this checking method.

[Prior Art] Conventionally, in an elevator, in order to maintain the car in a stationary state while the car is stopped, for example,
As shown in Japanese Patent No. 51, a vehicle equipped with an electromagnetic brake device has been proposed.

Such an electromagnetic brake device is one of the most important safety devices installed in elevators and is constantly used to ensure the safety of passengers.

It is the responsibility of the maintenance company entrusted with the management of the elevator to check whether such an electromagnetic brake device is fully functioning.

As mentioned above, since it is one of the most important safety devices, the function of the electromagnetic brake device should be checked, as shown in, for example, Japanese Patent Laid-Open No. 53-128377 and Japanese Patent Laid-Open No. 54-21893. A method has been proposed.

However, these methods require large-scale measuring equipment, take a large amount of time to measure, and are not only expensive as normal maintenance work, but also result in poor service to passengers due to prolonged downtime. There is a problem.

Therefore, normally, the plunger stroke of the electromagnetic brake device is measured and the operation of the plunger is confirmed simply based on the experience of maintenance personnel.

[Problems to be Solved by the Invention] By the way, in the conventional simple inspection method described above, the experience of the maintenance personnel serves as the criterion for judgment, so there is considerable variation in the inspection results depending on the maintenance personnel. was a concern. Therefore, there is a problem in that the simple inspection method described above is not necessarily suitable as a method for checking the operation of an electromagnetic brake device, which is one of the safety devices.

The present invention has been made in view of the actual situation in the prior art, and its purpose is to provide a method for confirming the operating characteristics of an electromagnetic brake device that can easily and quantitatively confirm the operating characteristics of the electromagnetic brake device, and The goal is to provide equipment.

[Means for Solving the Problems] In order to achieve this object, the method for confirming the operating characteristics of an electromagnetic brake device of the present invention provides a method for checking the operating characteristics of an electromagnetic brake device of the present invention. A pair of shoes, a pair of levers to which these shoes are fixed and rotatable around one end of each, a braking spring that applies force to the other ends of these levers in a direction toward each other, and a brake spring for applying force to the other ends of the levers. In a method for confirming the operating characteristics of an electromagnetic brake device including an electromagnetic device having plungers capable of applying force to the other end in a direction separating from each other, an operating current for operating the electromagnetic device is checked. The current detecting means for detecting, the displacement detecting means for detecting the amount of displacement of the plunger in response to the operating current, and the current signal output from these current detecting means and the displacement signal output from the displacement detecting means are the same. The electromagnetic brake device This is a configuration for determining whether the operating characteristics of the device are good or bad.

Further, the operating characteristic confirmation device used to carry out the method of confirming the operating characteristics of an electromagnetic brake device of the present invention includes a current detection means for detecting an operating current for operating an electromagnetic device provided in the electromagnetic brake device, and a an identification means for respectively identifying the rising and falling parts of the detected operating current; a waveform shaping circuit for shaping the current signal output from the current detection means into a pulse waveform signal upon identification by the identification means; A differentiation circuit that performs differential processing on the pulse waveform signal output from the waveform shaping circuit, a displacement detection means for detecting the amount of displacement of the plunger of the electromagnetic device in response to the operating current, and a displacement signal output from the displacement detection means. A signal synthesis circuit capable of superimposing a differential waveform signal outputted from the differential circuit on the differential circuit, and a recording device for recording the displacement signal and the differential waveform signal.

[Operation] As described above, the method for confirming the operating characteristics of an electromagnetic brake device according to the present invention includes detecting the operating current that operates the electromagnetic device using the current detection means and outputting a current signal, and A displacement detection means detects the amount of displacement of the plunger of the device and outputs a displacement signal, and also outputs these current signals.

Displacement signals are recorded in the same time series by a recording device, and in this state, the relationship between the displacement signal and the current signal is determined based on the recording results recorded in this recording device, and the relationship is compared with a predetermined reference value. The system was configured to determine the quality of the operating characteristics of the electromagnetic brake device.
By examining the above recorded results recorded on the same time series, it is possible to confirm the relationship between the plunger displacement amount of the electromagnetic device and the operating current of the electromagnetic device, that is, the operating characteristics of the electromagnetic brake device can be easily and quantitatively determined. can be confirmed.

Furthermore, since the operating characteristic confirmation device used to carry out the method for confirming the operating characteristics of an electromagnetic brake device of the present invention is configured as described above, the identification means can identify the rising part of the operating current when the electromagnetic brake device is released. Accordingly, the current signal output from the current detection means is shaped into a pulse waveform signal by a waveform shaping circuit, and the differential processing of this pulse waveform signal is performed by the differentiation circuit. The amount of displacement is detected by the displacement detection means and a displacement signal is output. Then, a differential waveform signal output from the differentiating circuit described above is superimposed on this displacement signal by a signal synthesis circuit, and these displacement signals and differential waveform signals are recorded by a recording device. Similarly, when braking the electromagnetic brake device, the falling part of the operating current is identified and the displacement signal and differential waveform signal are recorded. As a result, the current signal and the displacement signal are recorded in the same time series, that is, the relationship between the operating current of the electromagnetic device and the amount of displacement of the plunger of the electromagnetic device can be recorded in the same time series. The method for confirming the operating characteristics can be performed satisfactorily.

[Example] Hereinafter, an example of the method and apparatus for checking the operating characteristics of an electromagnetic brake device of the present invention will be described based on the drawings.

1 and 2 are diagrams for explaining an embodiment of the method and device for checking the operating characteristics of an electromagnetic brake device according to the present invention, and FIG. 1 shows the configuration of the device for checking the operating characteristics used to implement the method for checking the operating characteristics. Figure 2 is a characteristic diagram showing the operating characteristics of the electromagnetic brake device.

In general, the electromagnetic brake device 1 shown in FIG. 1 includes a pair of shoes 4 that can come into contact with the outer circumferential surface of a brake drum 2 via a lining 3, and these shoes 4 are fixed at an intermediate portion, and each has a lower end. A pair of levers 5 that can be rotated around the center, a braking spring 6 that applies force to the upper ends of these levers 8-15 in a direction toward each other, and an electromagnetic device 7 disposed above the brake drum 2, etc. It has become. This electromagnetic device 7 includes a case 7a
, an electromagnetic coil 8 and a fixed iron core 9 fixedly installed in this case 7a, a plunger movable downward, for example, a push-down rod 10, and a movable iron core 11 attached to the upper part of this push-down rod IO, respectively. It has a pair of arms 12, one end of which is pressed down by a push-down rod IO, and the other end of which presses the upper end of the lever 5 via a bolt 5a.

In the electromagnetic brake device 1 configured in this way, when the electromagnetic coil 8 is excited by the operating current when the electromagnetic brake device 1 is released, the movable iron core 11 is attracted to the fixed iron core 9, and the push-down rod 10 is pushed down. It will be done. Along with this,
Since the arm 12 rotates the levers 5 in the direction away from each other via the bolt 5a, the lining 3 separates from the outer peripheral surface of the brake drum 2, and the brake drum 2 becomes rotatable. On the other hand, when the operating current of the electromagnetic coil 8 is cut off during braking of the electromagnetic brake device l, the movable iron core 11
is released, that is, the suction effect of the fixed core 9 on the movable core 11 is released. Along with this, the levers 5 are rotated toward each other by the force of the brake spring 6, and the shoes 4 are pressed against the outer peripheral surface of the brake drum 2 via the lining 3, thereby restraining the rotation of the brake drum 2. It is supposed to be done.

The operating characteristic confirmation device 13 for confirming the operating characteristics of the electromagnetic brake device 1 has a spindle 14 that comes into contact with the upper end of the above-described push-down rod 10, and the push-down rod 1° that responds to the above-mentioned operating current. Displacement detection means for detecting the amount of displacement via the spindle 14, for example, a potentiometer 15; a support fitting 16 attached to the case 7a of the electromagnetic device 7 and supporting the potentiometer 15; and a signal line 17 connected to the electromagnetic coil 8. A recording device is connected to the output terminals of the potentiometer 15 and the measuring device 18 via signal lines 19 and 20, and records the waveform of the input signal on the recording paper 21. device 22
It consists of

The measuring device 18 described above includes a current detection means 31 that is connected in series to the electromagnetic coil 8 and detects the operating current flowing through the electromagnetic coil 8, and detects the rising edge of the operating current based on the detection signal output from the current detection means 31. a rising waveform shaping circuit 32 that recognizes and shapes the detection signal into a pulse waveform signal, a differentiation circuit 33 that performs differentiation processing of the pulse waveform signal output from this rising waveform shaping circuit 32, and the above-mentioned rising waveform shaping circuit 32. Similarly, there is a falling waveform shaping circuit 34 that recognizes the falling part of the operating current based on the current signal output from the current detection means 31 and shapes the current signal into a pulse waveform signal, and this falling waveform shaping circuit. Differential circuit 35 performs differential processing of the pulse waveform signal output from 34.
and a signal synthesis circuit 36 capable of superimposing the differential waveform signals output from each of these differentiating circuits 33 and 35 on the displacement signal output from the potentiometer 15. The waveform shaping circuit 32 and the falling waveform shaping circuit 34 provide a current 1 - identification means for identifying the rising and falling parts of the operating current detected by the detection means 31, and a current detection means according to the identification by this identification means. A waveform shaping circuit is configured to shape the current signal output from 31 into a pulse waveform signal.

In the recording paper 21 of the recording device 22 described above, as shown in FIG. In addition to displaying a displacement waveform 37 recorded in accordance with the displacement signal generated, this displacement waveform 37 includes a rising waveform 38 recorded when the operating current flows through the electromagnetic coil 8, and a rising waveform 38 recorded when the operating current of the electromagnetic coil 8 is interrupted. This is done by superimposing the falling waveform 39 that is recorded when the signal is recorded. That is, the displacement waveform 37 of the displacement signal, the rising waveform 38 and the falling waveform 39 of the current signal are recorded on this recording paper 21.
are recorded in the same time series.

It also shows a state in which investigation locations are marked for each point in order to investigate the state of the characteristics with respect to the results recorded by the recording device 22.

12- In this embodiment, when the electromagnetic coil 8 is excited when the electromagnetic brake device 1 is released, the current detection means 31 detects the operating current flowing through the electromagnetic coil 8 and outputs a current signal. Based on the current signal, the rising waveform shaping circuit 32 recognizes the rising part of the operating current and shapes it into a pulse waveform, and the differential processing of this pulse waveform signal is performed by the differentiating circuit 3.
Perform according to 3. This differentiated rising waveform signal is recorded by the recording device 22 via the signal synthesis circuit 36, and
1 and is displayed as a rising waveform 38. Next, when the push-down rod 10 and movable iron core 11 begin to move downward after T1 hours from the start of excitation of the electromagnetic coil 8, the potentiometer 15 detects this movement via the spindle 14 and outputs a displacement signal. At the same time, this displacement signal is recorded by the recording device 22, and the stroke starting point 41 is recorded on the recording paper 21.
It is displayed as a displacement waveform 37 starting from . As a result, the shoe 4 is gradually rotated in a direction away from the brake drum 2 by the above-mentioned push-down rod 10 via the arm 12, bolt 5a, and lever 5.

A gap is formed between this brake drum 2 and the lining 3, and a drum operation starting point 42 is recorded. moreover,
A stroke completion point 43 is recorded when the movable iron core 11 reaches the stroke end after completion of suction to the fixed iron core 9 after a time T3 from the drum operation start point 42 described above.

Then, when the operating current of the electromagnetic coil 8 is interrupted during braking of the electromagnetic brake device 1, the interruption of this operating current is detected by the current detection means 31 and a current signal is output, as in the case of starting excitation. Based on this current signal, a falling waveform shaping circuit 34 recognizes the rising part of the operating current and shapes it into a pulse waveform, and this pulse waveform signal is differentiated by a differentiating circuit 35. This differentiated falling waveform signal is recorded by the recording device 22 via the signal synthesis circuit 36 and displayed as a falling waveform 39 on the recording paper 21. Next, after a time T4 from the interruption of the operating current, the release operation of the movable core 11, that is, the attraction of the movable core 11 by the fixed core 9 is canceled, and when the push-down rod 10 starts to rise, the return start point 44 is reached. recorded. Time T, from this return start point 44.

Later, when the push-down rod 10 returns to its original home position, a return completion point 45 is recorded.

Therefore, the states of the displacement waveform 37, rising waveform 38, and falling waveform 39 shown in FIG. By comparing to time,
The operating characteristics of the electromagnetic brake device 1, such as the sliding condition of the movable iron core 11, the rotational condition of the shafts of the lever 5 and the arm 12, and the wear condition of the lining 3, are confirmed. That is, based on the recording results recorded in the recording device 22, the relationship between the displacement signal and the current signal is determined and compared with a predetermined reference value to determine whether the operating characteristics of the electromagnetic brake device 1 are good or bad. There is.

In the embodiment configured as described above, the relationship between the amount of displacement of the push-down rod 10 and the excitation state of the electromagnetic coil 8 is similar to that of the recording paper 2.
1, so as mentioned above, the required time T
By comparing 1 to T5 with respective predetermined reference times, the operating characteristics of the electromagnetic brake device 1 can be easily and quantitatively confirmed. Along with this, this electromagnetic brake device 1
Not only can the elevator be sufficiently managed including checking the operating characteristics of the electromagnetic brake device 1, but even maintenance personnel with relatively little experience can check the operating characteristics of the electromagnetic brake device 1.

[Effects of the Invention] Since the present invention is configured as described above, it is possible to quantitatively confirm the operating characteristics of the electromagnetic brake device, and therefore, it is possible to prevent variations in inspection results among maintenance personnel. This has the effect that the elevator can be sufficiently managed, including confirmation of the operating characteristics of the electromagnetic brake device. In addition, it is possible to prevent variations in inspection results as described above, and because it is easy to confirm the operating characteristics, even relatively inexperienced maintenance personnel can confirm the operating characteristics of the electromagnetic brake device. There is.

[Brief explanation of the drawing]

FIGS. 1 and 2 are diagrams for explaining an embodiment of the method and apparatus for checking the operating characteristics of an electromagnetic brake device 16- of the present invention, and FIG. An explanatory diagram showing the configuration of the device, and FIG. 2 is a characteristic diagram showing the operating characteristics of the electromagnetic brake device. 1... Electromagnetic brake device, 2... Brake drum, 3... Lining, 4...
- Shoe, 5... Lever, 6... Braking spring, 7... Electromagnetic device, 10... Push rod (plunger), 13... ...Operating characteristic confirmation device, 15...Displacement detection means (potentiometer), 21...Recording paper, 22...
Recording device, 31...Current detection means, 32...
... Rising waveform shaping circuit, 34... Falling waveform shaping circuit, 33.35... Differentiating circuit, 36.
...Signal threat circuit.

Claims (2)

[Claims] (1) A pair of shoes provided in the elevator and capable of contacting the outer peripheral surface of the brake drum through a lining, and a pair of levers to which these shoes are fixed and rotatable around one end of each; Operation characteristics of an electromagnetic brake device including a braking spring that applies a force to the other ends of these levers in a direction toward each other, and an electromagnetic device having a plunger that can apply a force to the other ends of the levers in a direction that moves them away from each other. The method for confirming the operating characteristics of an electromagnetic brake device includes: a current detecting means for detecting an operating current for operating the electromagnetic device; a displacement detecting means for detecting a displacement amount of the plunger in response to the operating current; A recording device that records the current signal output from the current detection means and the displacement signal output from the displacement detection means in the same time series is used, and the current signal is determined based on the recording result recorded in the recording device. A method for confirming operating characteristics of an electromagnetic brake device, characterized in that the relationship between the displacement signal and the displacement signal is determined and compared with a predetermined reference value to determine whether the operating characteristics of the electromagnetic brake device are good or bad. (2) A device for confirming operating characteristics of an electromagnetic brake device used to implement a method for confirming operating characteristics of an electromagnetic brake device, including a current detection means for detecting an operating current for operating an electromagnetic device provided in the electromagnetic brake device; Discrimination means for identifying the rising and falling parts of the operating current detected by the detection means, and a waveform shaping circuit that shapes the current signal output from the current detection means into a pulse waveform signal upon identification by the discrimination means. a differential circuit that performs differential processing on the pulse waveform signal output from the waveform shaping circuit; a displacement detection means that detects the displacement amount of the plunger of the electromagnetic device that responds to the operating current; Operating characteristics of an electromagnetic brake device comprising: a signal synthesis circuit capable of superimposing a differential waveform signal output from the differential circuit onto a displacement signal; and a recording device that records the displacement signal and the differential waveform signal. Confirmation device.