JPS5964484A - Drive in case of maintenance of elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for operating an elevator during maintenance, and in particular,
The present invention relates to an operating device suitable for inspecting a door closing mechanism in a landing on the lowest floor.

Maintenance and inspection of equipment in the elevator hoistway is normally performed by maintenance personnel riding on the elevator car. FIG. 1 is a diagram for explaining this work.

In FIG. 1, 1 is an elevator car, 2 is a maintenance person riding on the car, and 2' is an operating panel for maintenance operation on the corner.

3 is the bottom of the hoistway, 4 is a buffer provided at the bottom of the hoistway 3, 5 is the lowest floor, and 6 is the lowest floor 5. The door locking mechanism of the landing door, 7 and a cam fixed to car 1, and 8.9 a limit switch that is pushed by cam 7 and stops one car when car 1 goes past the bottom floor 5 by a predetermined distance. and is fixed to the hoistway.

Is it okay to have only limit switch 8?The reason why limit switch 9 is provided is to create a dual system just in case.If only limit switch 8 operates, it is assumed that it is a temporary malfunction of the control system, and the limit switch is increased. It is designed to be able to return automatically when a driving command is given, but 9
If it operates up to this point, it is assumed that there is a failure in the control system, and even if you give a rising operation command, it will not return! 1 In order to bring the elm bake to a stopped state without returning to TII. 1. The maintenance worker 2 on top of car 1 inspects the equipment in the hoistway one by one without lowering car 1 at low speed. .

However, since the limit switches 8 and 9 operate on the lowest floor 5, only the armpits of the corner 1 can be lowered by a few degrees (I11). Since it is located below the top, maintenance personnel 2 cannot inspect it without touching it.

It is common practice to erect a ladder or the like on the bottom 3 of the hoistway and inspect the equipment at such a position ib by climbing on it.

By the way, in a high-speed machine V-beta, the shock absorber 4 is as thin as several nanometers, so the depth of the hoistway bottom 3 is also quite deep, and it is not easy to inspect it manually. It is often dangerous.

Therefore, if the maintenance operation state limit switch 8.9 is operated (7), the elevator can be operated downward.1.The corner is lowered to the position where the shock absorber is operating, and maintenance personnel inspect it from the ceiling of the car. It is desirable to be able to do so.

FIGS. 2 and 3 show a conventional method invented for this purpose.

In FIG. 2, 10.11 is a stop switch that operates in the same way as the limit switches 8 and 9 fixed to the hoistway, the stop switch 10 is located below the limit switch 9, and the stop switch 11 is located below the stop switch 10. will be installed.

In Fig. 3, 10- corresponds to the DC power supply, 12 and 13 correspond to the limit switches 8 and 9, respectively, which are installed at the top position, 14 is the changeover switch between normal operation and maintenance operation, and 15 is the limit switch. Relays 15a to 15C which command all normal operations when energized, normally closed contacts of 15a to 15C, 16id two pushbutton switches for operation during maintenance on the lowest floor, and 17 the lowest floor which is energized and deenergized by the pushbutton switch 16. Maintenance operation relay, 1
7a.

17bid is its normally open contact, 17C is its normally closed contact, 18
19 is a normally open contact of a relay that gives a lift command to car 1, and 20 is the same F. The normally open contact of the relay that gives the 411 command to descend, 21 is a relay that causes car 1 to move up by 1 when energized, and 22 is a relay that causes it to rotate downward.

The ascent command relay 21 is energized only while the "up" button installed on the operation panel 2' for operation during maintenance operation is pressed, and the "down" button also installed on the same 2' is pressed. The configuration is such that the distance lowering command relay 22 is fully energized!
There are 1.

Now, it is assumed that the switch 14 is opened, the relay 15 is deenergized, and is in the maintenance operation state.When the maintenance worker 2 sitting on the corner 1 descends and continues to press the 1 button, the contact 20 closes. Therefore, (G)-18-j3-9-8-20-2
The lower operation relay 22 is energized by the circuit 2-(c), and the corner 1 is lowered in the maintenance operation state.

When the cam 7 or the air switch 8 is turned on, the switch 8 opens, so the descending operation relay 22 is deenergized and the car 1
stops.

At this time, if the push button switch 16 is kept pressed, the contact 158 remains closed, so the lowest floor maintenance operation relay 1
It's about 7 or so. At the same time, press the "Down" button again to close contacts 1 and 20. Therefore, H-)-18
-13-11-151)-178-10-15C-17
The b-20-22-H circuit is connected and the descending operation relay 22
is pushed again (=J force, and car 1 descends 1, i.e.,
Even if the limit switch 8.8 is open 1~, the car 1 can be lowered regardless of this.

When the stop switch 10 is pressed by the car 1 or car 1 descending cam 7, the switch 1O is opened, so that "1; the descending operation relay 22 & is deenergized and the car 1 is stopped.

If the stop 1-switch 10 is installed in a position where the maintenance person 2 on corner 1 can inspect the caulking mechanism 6 etc. of visitors, the maintenance person will be able to place it on the corner 1. Can perform maintenance and inspection work.

In this way, after car 1 has descended and cam 7 has pressed the stop switch IO', if for some reason it continues to descend, the stop switch 11 is pressed and the magnetic brake gear is activated to stop car 1. Etc., it works.

With this method, it is possible to descend beyond the I'l limit switch 8.9, so the question remains whether to check the door locking mechanism etc. on the lowest floor with car 1 or TiJ No and Ishi 2. .

The reasons for this will be explained below.

Elevator C and governor ('Therefore, it must be operated within the flill-limited speed range, and the lli control system is correct.'
If it is a cloth, the limits 8 and 9 will not move, and the machine will stop safely in front of them.

し））・し、：lt：、I Qll ta i＆IF
When an abnormality occurs, the stop will stop at the normal stop position, but the limit switches 8 and 9 will open and the heavy artillery brake will operate, and with the addition of the shock absorbing effect of the shock absorber, the stop will be stopped safely, although the stop position will be greatly distorted. can do.

This pattern is shown in FIG. In the figure, ) lo & J: the regular stopping position on the top floor, H, is the highest.
- Floor limit IJL'-12 operating position [, I- (2 is also the operating position of 13, IIO is the normal stop position on the lowest floor, li l is the operating position of limit switch 8, L
, is the same as 0 or 1? i,,L3idJ si'1
．． + 4. 1 and 4 are the positions where the damper 4 starts the shock absorber zu'1, 1 and 4 are the positions where the buffering effect of the damper 4 stops, ', Ltki is the position of the bottom 3 of the descending path, and vH is the position during normal operation. Maximum speed 1-81 is the operating speed of the Voa fd speed limiting governor. .

31 is the speed curve when normally operating from the top floor to the bottom floor. 32, during operation, the speed increases due to some faulty cause of the control device, and the operating speed of the governor is V.
+(a), the electrified brake operates and decelerates to a stop. 33 is the speed curve when the governor did not operate (due to some reason, the speed did not decelerate at the normal deceleration position and the limit The speed curve of the platform is shown when the switch 8 is activated, the electromagnetic brake is activated, and the shock absorber is also activated to stop the platform.

Figure 5 shows the speed curve for maintenance operation.
41i=i, descending T'L at the secant speed for operation during maintenance
, LI is the speed curve when the limit switch 8 operates and stops at the LI position.

42 is a speed curve when the speed rises above the normal value due to some reason, and shows that the limit switch 8 was activated and stopped at the LI position.

In the method of FIGS. 2 and 3, in addition to the limit switch 8.9, a stop switch 10. A push button switch 16 for operation at the time of maintenance on the lowest floor is provided at the lowest floor maintenance operation push button switch 10.
11 is activated (4), the lowering command relay 22 is deenergized.

This pattern is shown in Figure 6. In the figure, L5
is the position in which the stop switch 10 is provided, and this position is generally below the position L3 at which the buffer 4 starts operating υi]. L6 is the position v1 where the stop switch 11 is provided, and this position uzL is the position where the buffer 4 is pushed out and the buffering effect disappears, so to speak, the position W where there is a 1% turn short.
Of course it has to be higher than I-4.

Press the diversion pushbutton switch for maintenance on the lowest floor, and then lower it by giving a descending command. ■7.
A speed curve is shown when the stop switch 10 is stopped by I+ force at the position fσ. In this case, the elevator can be safely stopped when the speed is below the allowable limit V□ during maintenance operation.

52 presses the pushbutton switch 16 in the same way, and when a descending command is given and a descending operation is performed, the speed increases for some reason midway through and the permissible limit V, n'! i? exceed,
Although the stop switch 10.11 was operated at the L 5 and La positions when Vm2 was reached, the speed could not be decelerated sufficiently, and the shock absorber 4 reached the position where the buffering effect disappeared, that is, at the point of turn short [I L 4]. Also, the speed curve shows the case where the speed of ■m1 remains and the vehicle stops after receiving a considerable impact sound.

As mentioned above, even if the elevator can safely descend to a fairly low position and stop under normal operation, for some reason the elevator
Sudden speed increases can be extremely dangerous.

If the speed of the elevator increases beyond the permissible limit Vm during maintenance operation, the speed increase can be prevented by taking measures such as immediately releasing the lowest floor maintenance operation push button switch 16. As you may think, the rate of increase in elevator speed is more than 0.2 g in the worst case, or 12 g per second.
There may be cases where the speed increases by more than 0m 7min,
On the other hand, the speed limit during operation during maintenance is generally 2Qm/
Since r n i n ~40 mouths 1/x n i n, this allowable limit may be greatly exceeded.

For this reason, when installing a stop switch 10.11, place it at the upper position with sufficient margin.
In addition to the problem that this method does not necessarily satisfy the intended purpose, as mentioned above, the speed of the elevator becomes abnormally high during maintenance, and the There was an issue where maintenance personnel were at risk.

The purpose of the present invention is to suppress the abnormally high speed of an elevator during maintenance, and also to safely lower the elevator car to a height of 100 degrees.
An object of the present invention is to provide a method for making it possible to inspect a door closing mechanism section, etc. of a landing hall.

The four points of the present invention are to provide a speed limiter fc that operates only during operation of the maintenance unit 11, and to appropriately determine the inverse curve of the limit speed.

An embodiment of the present invention will be described below with reference to FIGS. 7 to 9.

In Fig. 7, VMH is the maximum cylinder speed when normally operated during maintenance operation, and VMG is the maximum operating speed of the speed limiter that operates during maintenance operation, which is slightly larger than VMH. Set.

61 is the top floor where the limit switch 12 is installed W:
H, and the position L where the lowest floor limit switch 8 is provided.
1, in this case V
It is assumed to be constant at the value of MG.

62 is the operating speed curve of the speed limiter between L1 and L70. L is the position where maintenance and inspection of the door closing mechanism etc. on the lowest floor is possible, and is above the position L4 where the shock absorber 4 is pushed all the way down and loses its cushioning effect. is still the expected position.

The operating speed curve 62 is set to zero at the position shown in the figure, and when the speed of the elevator reaches this curve and the speed limiter operates, the car will always be able to safely stop above L4. stipulate.

63 descends from the top floor at the operating speed ■λil+ at the time of maintenance, -CL, and in the (1) position, the limit switch 8 operates, and -.
After stopping once, it starts again and is at a constant position of υ1, that is,
In this case, this is the speed curve when the car is brought down to L7 and stops normally.

Similarly, the limit switch 8 on the bottom floor was operated, and the limit switch 8 on the bottom floor was stopped once, and then it started again, but the speed increased for some reason and reached the operating speed curve 62 of the speed limit device. The figure shows the speed curve of S6 which is in operation and stopped safely within the damping range of the shock absorber.

In this way, maintenance [trot 11i for 16° driving! If the I-limited K is adopted and the operating speed curve is set as shown in Figure 7, the car can be safely lowered to a predetermined low position for maintenance and inspection of the door locking mechanism on floors M-F, for example. It becomes possible to do so.

FIGS. 8 and 9 are examples of circuit configurations for realizing the operation described in item 1. The part indicated by the solid line in FIG. 8 is an example of a commonly used elevator control system, and the part indicated by the dotted line is added to realize the above operation.

71 is a one-stroke detection device set aside above the bracket, and 71a and 71b are the components of that device, respectively.
l-r. 72.73 is 71a, 711)a: To operate (elements attached to the wall in the exit passage at excessive intervals, when passing 71a, 71b, 72 or 73, 71a, 71b respectively operates) can detect its position.

741, the position detection device uses the tail cord to transmit the signal sound of 71 to all machine rooms. 75 is a sheave, 76 is a counterweight, 77 is an electric motor, 78id is a magnetic brake, 79 is an alternator for speed detection, 80 is a continuous position signal sequence generation circuit, and 79 is an AC voltage waveform 'tffil-cut'. However, since an error occurs, the position detection device fl', 71
I am trying to correct it using the signal. Furthermore, sheave 75
If the grooves of are worn out, the position calculated from the count (M) of the AC voltage waveform of 79 and the actual position will continuously differ. Therefore, 71 is provided with two or more detection elements 71a and 71b, A correction 1 series is calculated from the counted value of , so that accurate position signals can be generated.

81 is a speed It command generation circuit; 82 is an operation control circuit; 8;
lJ, speed command circuit, 84v main circuit, 85 safety circuit, 86 limit speed ifi generation circuit during maintenance operation, 8
7 is a speed limiting circuit during maintenance operation, which, together with 86, has a so-called small cabana configuration.

91 is the call number 11, 92 is the AC power source, 93 is the maintenance operation circuit, and 94 is the mechanical gun.

105C, 105d, 105d't: It is the contact point of the relay described in L No.
, l: Close 105 Cj, 105'd'r, tl
ilV--tl Iruka, 105C is U during maintenance operation
105d and 105d' are closed.

We will explain and explain the case of normal operation without interruption. At this time, 105C is closed and 105d and 105d' are open, so the dotted line circuit d is irrelevant.

When a call signal is given from 91, the operation control circuit 82
is sent from the continuous position signal generating circuit 80. Based on this position and the call signal, it is determined which step of ascending or descending operation is being performed, and a signal is given to the speed command generating device 81. , 1° speed trend [Circuit 83 compares the command from 81 and the speed detection AC output ih:4a79 iM''3 to generate an appropriate speed command and calculates the main circuit 84.
The analogy is that the motor 77 controls the speed of the motor 77.

Violet! ! ! 71 Sakura 77k moves the cage through sheave 75.

When the speed of the elevator reaches the limit f, that is, Vna in FIG. 4, the mechanical cabana 94 operates,
The number 1 to 7 is sent to the safety circuit 85, and the main circuit 84 is completely turned off, and at the same time, the electromagnetic player 78 is operated to stop the elevator. Further, if any other abnormality occurs, a signal is sent to the safety circuit 85, and the safety circuit 85 operates to take measures such as stopping the elevator.

The lifting platform operated by the maintenance station is 105C or 105D when opened.

1, 05 d″i:)’t#l The dotted line circuit is alive.

When a maintenance operation command is received from 93, the operation control circuit 82 instructs the speed command circuit 81 to generate a speed command for maintenance operation. The speed limit circuit 83 controls the main circuit 84 to operate in the maintenance operation circuit.

During maintenance operation, if the speed exceeds the upper limit for some reason, the operating speed curve of the speed limiter during maintenance operation, for example, 61 in Fig. 7, is reached, the output is output from 87, and the safety circuit 85 is activated. It operates and the elevator stops.

FIG. 9 shows a relay circuit of the present invention. 104 is a changeover switch for maintenance delivery and normal operation σ), and 105 is a relay that issues a full normal operation command when activated by +1, and 105a.

105b, l05d, 105d' are the 'small open contacts,
105C, 105d, 105d' are shown in FIG.

106 is a push button switch 1 for operation during maintenance on the lowest floor; 107 is a maintenance operation relay that is energized and deenergized by 106; 107
A and 107b are normally open contacts, and 107C is one normally open contact.

During maintenance operation, open the switch 104 and de-energize the switch 105. 1. When you press the "F down" button on the operation panel above which is used for maintenance purposes, switch 20 closes and the down command relay 22 is activated. (=J force 11, during maintenance]) V-axis speed - C
- It rains.

When reaching 11-a, where the highest floor limit relay 8 operates,
8 is open and 22 is de-energized, -1 Doo operation stops +)! At the same time, a signal is sent to the safety circuit 85 in FIG. At the same time as the electric motor's ``1 inkstone source〃) is determined,
'Ia magnetic brake 78, make one operation, then stop the elevator for a while.

Next, when the lowest floor size maintenance operation push button switch 106 is pressed, a circuit of ([→-10 (to i-1058-222-107-)
While pressing the pushbutton switch 106 for IL,
]07 maintains a thin state.

As a result, the maintenance operation circuit shown by the dotted line in Figure N'-8 is active, and the operation '(c-) described in Figure 7 can be realized.

According to the present invention, the elevator car can be lowered sufficiently to inspect the door closing mechanism, etc. of the landing on the lowest floor on the 11th.

In addition, during maintenance operation, if the elevator speed increases due to an abnormality in the II cicada i1 device, the safety circuit will be activated immediately. 5. First of all, the tt + ul- statement on the 1st side of the elevator can be prevented from putting the elevator in danger.
'', 21-i: l ke; In order to check the assembly part i7i door damping structure, go to 11t''-Yakuake, l) 5. Conventional explanatory diagram, Fig. 3 is the relay circuit of Fig. 2. Figure 41::<J 2
1: Figure 6 shows the conventional method! Crop prevention 5. Ya, Ming [6
1 and 7 are detailed explanations of the present invention.FIGS. 8 and 9 are control system diagrams of one embodiment of the present invention.

Un...Stopping position of the 11th scale on the top floor, 1■1...
・12 operating position, J12...13 operating position, ],. ...The most traditional position: Stop position, L,
... 8 operating position t6°9, ], 2... 9 operating position, L3... 4 operating position, L4...
・4 position without buffering effect, Lt...3 position,
ν11()...Operating speed of the brake, VMH...Maximum speed W during operation during maintenance, 'v''va...Maximum value of operating speed of the speed limiter during operation during maintenance, L7... t above L4.

plexus 10 Eel Z mouth Me3 ro Na 4th prisoner fast waves Coloring again speedle Eel et al. Clothes T-mouth 1 Figure Meq　m 1-chome, Kanda Nishikicho, Chiyoda-ku, Tokyo No. 6 Hitachi Elevator Service Inside the corporation ■Inventor: Shigeru Arayō 1-chome, Kanda Nishikicho, Chiyoda-ku, Tokyo No. 6 Hitachi Elevator Service Inside the corporation ・Applicant: Hitachi Elevator Service Co., Ltd. 1-chome, Kanda Nishikicho, Chiyoda-ku, Tokyo No. 6

Claims (1)

[Claims] 1. A speed limiting device is provided that operates only when the elevator is operating during maintenance, and when the speed of the elevator increases and reaches a predetermined speed limit value for the maintenance operation, A speed limiter is configured to operate to stop the elevator or bring the elevator speed to the limit value (il-%).2. In an elevator system in which a limit switch operates to stop the car when the car passes over a floor, a speed limiter is provided that operates during maintenance operation, and the operating speed is set at a predetermined distance from the operated position of the limit switch. 1. A maintenance operating device for an elevator, characterized in that a relationship between operating speed and distance is determined so that the distance is zero, and the heel is made to travel within that operating range regardless of the operation of the limit switch.