JPH0466483A - Device for automatically checking electromagnetic brake for elevator - Google Patents

Abstract

PURPOSE:To automatically check the operating condition of an electromagnet mechanism by providing a checking means for energizing the coil of an electromagnet through an automatically variable resistance with a resistance value gradually changed through energization and detecting a current amount in operation of the electromagnet mechanism. CONSTITUTION:In normal operation, a starting relay is operated by a drive device 1 wherein an electromagnetic brake 1a is released through energization. A voltmeter information 12 or the like is operated by a controller 15 in the following manner. A voltmeter information is energized and if it is recognized that a cage 3 is checked to be in no-load by a non-load information 8a within the cage 3 and no-call is checked by an elevator no-call information 9, a cage uppermost floor operating command is generated, and consequently the drive device 1 is energized thus elevating the cage 3. Subsequently, a checking means 13 is energized and thereby the resistance value of a variable resistance 11 is gradually reduced which causes a brake to be released. When a contact 1c of a brake switch is opened, an information 12a is generated. An output of a voltmeter 12 is calculated, thus checking the difference to that of the last checking. In the case that the plangent sliding resistance of the brake 1a is made abnormally larger and the output of the voltmeter 12 is within the abnormal region, the abnormality of the brake 1a is informed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic inspection device for an electromagnetic brake for an elevator, which is opened by electromagnetic force when the elevator is going up or down.

[Prior Art] For example, as shown in Japanese Utility Model Application Publication No. 59-88526, the brake shoe is pressed against the brake vehicle by a spring during braking, and when the brake is released, the brake shoe is pressed by electromagnetic force via an electromagnetic mechanism. There is an electromagnetic brake device for elevators that releases and releases from the brake car.

[Problems to be Solved by the Invention] The electromagnetic brake device as described above is configured such that when the coil of the electromagnet is energized, the plunger slides inside the housing to displace the brake shoe.

However, when the plunger is operated, the plunger tilts with respect to the sliding axis, and the operation is locked. There has been a problem in that so-called self-lock occurs, making it impossible to obtain the required braking or releasing action.

The present invention was made to solve this problem, and an object of the present invention is to obtain an automatic electromagnetic brake inspection device for elevators that inspects the operating status of an electromagnetic mechanism.

[Means for Solving the Problems] In the automatic electromagnetic brake inspection device for elevators according to the present invention, the coil of the electromagnet is energized via an automatic variable resistor whose resistance value gradually changes depending on the energization, and the operation of the electromagnetic mechanism is controlled. A control device is provided that detects the amount of electricity at the time, and a control device that energizes the abnormality notification means when the detected amount of electricity is abnormal.

[Operation] In the elevator electromagnetic brake automatic inspection device configured as described above, the inspection means is energized in a timely manner, and an abnormality is notified when the sliding resistance of the plunger is large.

[Embodiment] Figures 1 to 4 are diagrams showing an embodiment of the present invention. In Figure 1, (1) is a drive device consisting of an elevator hoist;
a) is an electromagnetic brake provided in the drive device (1) and has a coil (lb), (lc) is a common contact of the brake switch that is pressed when the electromagnetic brake (la) is activated, and (2) is the drive device ( The main rope wrapped around (1), (3
) is a counterweight suspended from the other end of (2) (5) is a normally open contact 2 (6) of a starting relay (not shown) is an inspection command means 9 (7) having a normally open contact (6a) (8) is a clock device that issues inspection time information (7a), (3) is a weighing device that issues interior load information (8a), and (9) is the operation status of the car button and landing button (both not shown). (10) are normally open contacts (10a) (10b)
, the inspection relay (11) with a normally open contact (10c) is an automatic variable resistor whose resistance value gradually changes when energized, (
+2) is a voltmeter that emits voltmeter information (12a), (1
3) is an inspection relay (10) and an automatic variable resistor (11).

and a voltmeter (12); (14) a position detector that is pressed when the car (3) is on the top floor of the hoistway (not shown) and emits car (3) position top floor information (14a); , (15) is a control device having an inspection program, which includes an I10 boat (15a) and a RAM (15b).
).

It is formed by a computer (15e) having a CPU (15c) and a ROM (15d).

(16) is an abnormality notification means installed in a control room of a building where elevators are installed, an elevator information center that centrally manages a large number of elevators, etc., and is constituted by an appropriate display, automatic announcement device, etc.

The operation of the electromagnetic brake automatic inspection device for elevators configured as described above will be explained with reference to FIGS. 3 and 4.

The starting relay is activated during normal operation of the elevator.

When energized, contact (5) closes and (+)-(5)-(
10c) (lb) - (-) circuit connects the coil (1b
) is energized.

The electromagnetic brake (1a) is released and the car (3) is driven by the operation of the drive device (1).

Further, in order to inspect the electromagnetic brake (1a), the contact (6a) is closed by the operation of the inspection command means (6).

A check relay (10) is energized by a circuit of (+)-(6a)-(15)-(10)-(-) via a control device (15) to be described later.

Then, the contacts (10a) and (10b) are closed, and the contacts (10a and 10b) are closed.
0c) is open, (+)-(10a)-(11)-
The coil (lb) and automatic variable resistor (11) are energized by the circuit (10b)-(lc)-(lb)-(-).

This will change the voltmeter information (12a) from the voltmeter (12).
is issued and the electromagnetic brake (1a) releases (
1c) is opened, the coil (lb), automatic variable resistor (1
1) is deactivated.

In addition, this voltmeter information (12a) etc. is sent to the control device (15).
It operates as shown in the flowchart shown in FIG.

That is, in step (101), the inspection command means (
6) is energized, the process proceeds to step (102), and according to the inspection time zone information (7a) of the clock device (7), if it is within the inspection time zone such as midnight, the process proceeds to step (104), indicating that the inspection time is outside the inspection time zone. If so, the process returns to step (101,) after a predetermined time limit in step (103).

Then, in step (104), the weighing device (8)
If there is no load based on the car (3) internal focus load information (8a), the process proceeds to step (105), and if there is no load, the process returns to step (1, 01) via step (103).

Next, in step (105), based on the elevator call information (9) of the car call and hall call, if there is no call, the process proceeds to step (106), and if there is a call, the process goes to step (103) and then to step (101). Return to

In step (106), a car top floor operation command is issued, the driving device (1) is energized, the car (3) is raised, and the process proceeds to step (107), where the car (3) detects the position detector (14). If not pressed, step (106'
).

Further, when the position detector (14) is pressed and the car position information (14a) on the top floor is issued, the process advances to step (108).

In step (108), the inspection means (13) is energized, the resistance value of the automatic variable resistor (11) gradually decreases, the electromagnetic brake (1a) is released, and the contact point (1c) of the brake switch is opened. Voltmeter information (12a) is issued.

Next, the process moves to step (109), where the output value of the voltmeter (12) is calculated, that is, the difference from the 7 reference value and the difference from the previous inspection are verified.

Then, the process proceeds to step (110) and the electromagnetic brake (1a
) The sliding resistance of the plan sheet is abnormally large and the voltmeter (1
If the output value of 2) is within the abnormal range, step (11) is performed.
Proceed to 1).

In step (111), the abnormality notification means (16) is energized to notify the abnormality of the electromagnetic brake (la).

As a result, the operating status of the electromagnetic brake (1a) is automatically inspected, so the electromagnetic brake (1a) can be easily managed without requiring special human intervention, and accidents caused by abnormalities in the electromagnetic brake (1a) can be prevented.

In this embodiment, the inspection means (13) is energized during the predetermined inspection time period when the car (3) is unloaded and not called, so that the elevator passengers are not required to operate the car (3) during the second inspection. It doesn't make you feel uncomfortable.

In addition, since the coil (1b) is energized for inspection when the car (3) is on the top floor, it is assumed that due to unforeseen circumstances, the electromagnetic brake (1a) becomes unable to perform braking again during the inspection operation. Also, due to the weight of the two counterweights (4), the car (3) rises while the car (3) is at low speed.

The counterweight (4) stops because it is supported by a buffer (not shown).

Therefore, it is possible to prevent an accident due to the inability to brake again during the 9th inspection operation.

[Effects of the Invention] As explained above, the present invention energizes the coil of an electromagnetic brake through an automatic variable resistor whose resistance value gradually changes depending on the energization, and detects the amount of electricity during operation of the electromagnetic mechanism. This system detects abnormalities in the electromagnetic brake and automatically notifies you.

As a result, the operational status of the electromagnetic brake can be easily inspected without requiring special human intervention, which has the effect of facilitating elevator management and improving safety.

[Brief explanation of drawings]

FIG. 1 is a conceptual overall configuration diagram showing one embodiment of an automatic electromagnetic brake inspection device for elevators according to the present invention, FIG. 2 is a conceptual circuit diagram showing electrical connections of the equipment shown in FIG. 1, and FIG. 1 is an electric circuit diagram of the inspection means, and FIG. 4 is a flowchart explaining the operation of FIG. 1. (1)...Drive device, (la)...Electromagnetic brake, (lb)...Coil, (11)...Automatic variable resistance, (13)...Inspection means. (15)...control device, (16)...abnormality notification means.In the figure, the same parts are indicated by the same reference numerals.

Claims (1)

[Claims] An elevator equipped with an electromagnetic brake operated by an electromagnetic mechanism, and an inspection means that energizes the coil of the electromagnet through an automatic variable resistor whose resistance value gradually changes depending on the energization, and detects the amount of electricity when the electromagnetic mechanism operates. and a control device that operates when the amount of electricity exceeds a predetermined value to energize an abnormality notification means.