JPS5820871B2 - elevator control device - Google Patents

Description

[Detailed description of the invention] The present invention particularly relates to a control device for medium and high speed elevators.

Conventionally, a floor division operation system has been widely put into practical use as a control system for medium-high speed elevators, but the operation efficiency may be lowered for reasons described below.

Therefore, various methods and devices have been proposed as methods to compensate for the shortcomings of floor division operation, as will be described later.

These proposals can be broadly divided into two categories.

The first is a mechanical type, which is a conventional floor controller that converts the preceding position and synchronized position into voltage using a differential transformer, etc., creates a differential voltage, and based on that, the elevator's maximum speed and Elevators that perform deceleration control, and that control the maximum speed and deceleration by creating the distance between the preceding position and the synchronous position using a differential mechanism, converting it into an electrical signal using a scale meter, various position detectors, variable resistors, etc. It is a control device.

The second type is an electronic type that converts the travel distance of the elevator into a pulse number using a pulse generator or the like, or converts the travel speed of the elevator into voltage using a speed generator, and performs elevator control based on the voltage.

All of the above-mentioned proposals require a device that converts the movement of the elevator into electrical signals by some means, so they have the drawbacks of reduced reliability and increased costs due to dust, foreign matter, wear, etc. .

Now, the above-mentioned floor division operation and its disadvantages will be explained based on FIGS. 1 and 7.

FIG. 1 shows an example of an elevator operating curve, in which the elevator is run with acceleration limited to 0.1 g during both acceleration and deceleration.

The operating curves Vl, F2, and F3 each have a maximum speed of 105 when traveling from floor F1 to F2 shown in Fig. 7.
m/deception, 90 m/min.

The case where the distance is 60m/M is shown.

The area surrounded by the driving curve and the horizontal axis (time axis) indicates the travel distance, and all three driving curves match.

According to the conventional floor division operation system, the shortest floor distance is 2.5 m, as shown in Figure 7, and the acceleration command for 1st floor operation is 6.
It was kept constant at 0 m/m.

That is, when traveling between floors F1 and F2, the maximum speed is limited to 60 m/min as shown in the operating curve ■3, so compared to the ideal operating curve ■1, the speed is t13 (
This means that the operating time increases by approximately 1 second).

In other words, the conventional floor division driving system does not determine the maximum speed based on the distance traveled, but the first floor driving method determines the maximum speed by 90 m / y.
nin, 2nd floor operation is 120m/mm, 3rd floor operation is 1
50m/m+y+, rated speed 180m/m for floors above 4th floor
It was uniformly decided that it would be the first prize.

This is not a problem when installed in a building where the pitch of each floor is all 3.5 m, but as shown in Figure 7, in basement floors, rooftops, etc., the floors are shorter than normal floors. In addition, if there is a short floor of 3.5 m or less on the first floor, it is necessary to limit the length of other floors to 60 m/-, which has the disadvantage of reducing operating efficiency.

In addition, in conventional floor division operation, the maximum speed was selected at a pitch of 30 m/-, but since this uniformly determines the maximum speed, even if a subdivided maximum speed is provided, there will be unused speeds. However, it is not possible to expect the effect to be commensurate with the cost increase.

As you can see from Figure 1, the maximum speed is 60 m/m and 90 m/m.
/-, there is a difference of 20% in driving time, but if you make a 15m/m pinch like 90m/- and 105m/-, the difference is reduced to 2.5%.

In other words, although floor segment operation itself does not impair the practicality of the elevator, conventional floor segment operation is inefficient because the maximum speed is determined uniformly based on the number of floors traveled. It has the disadvantage of requiring frequent driving.

An object of the present invention is to provide an elevator control device that eliminates the above-mentioned drawbacks of the conventional floor division operation, is inexpensive, has high reliability, and can obtain a practically ideal operating curve. be.

The key point of the present invention is that the maximum speed for floor segment operation is determined based on the departure floor signal and the scheduled arrival floor signal, in accordance with the actual situation.

Prior to a detailed explanation of the present invention, an outline of elevator speed control will be explained based on FIG. 2.

The acceleration/deceleration of an elevator cannot be increased above a certain value due to the comfort of the ride.

Therefore, the acceleration/deceleration distance traveled during the period of accelerating to the rated maximum speed (180 m/m here) on high speed L//<- evening, or decelerating and stopping from the maximum speed far exceeds the distance between each floor. I end up.

Therefore, it is desirable to drive at an ideal speed commensurate with the distance traveled.

It is not necessarily impossible to determine in great detail the optimum maximum speed for the distance covered.

However, as can be seen from Figure 2, when comparing the driving curve v4 when traveling at a maximum speed slightly below 180 m/m with the driving curve v6 when traveling the same distance at a maximum speed of 150 m/-, the traveling time is 0.2 seconds (2.5% in ratio)
) Differences in degree occur.

However, the pitch is finer than the conventional 30m/- pitch, and the pitch is 165m/-.
Comparing the case using the driving curve v5 created by adding a new maximum speed of m/-, there is a slight difference of about 0.065 seconds in terms of running time (0.8% in terms of ratio).

In other words, even if you do not set the maximum speed in detail by dividing it into extremely small sections such as 179 m/-, for example, 165 m/m1
If it is operated at n, it can be said that it is better than practical.

Also, instead of determining the final maximum speed immediately after departure, first determine the maximum speed at time t and time t2 t t3 t t4 t
t5 and the point that the maximum speed is sequentially raised in a stepwise manner as shown in the command curve V i 1 is the same as the conventional floor division operation.

This is so that if a call occurs on the next floor by time t2, it will be serviced.

Further, as is the case with the prior art, the operating curve below the maximum speed command curve vix shown in FIG. 2 cannot be operated at a predetermined acceleration.

FIG. 3 is a block diagram of the entire elevator control device,
Based on this figure, an overall explanation and devices closely related to the present invention will be explained.

The scan signal generating device 1 performs scanning for synchronization, which is necessary because each of the floor-related control devices 3, 4, 5, and 7, which will be described later, is made into a time-sharing processing circuit to reduce the size and cost of the device. A signal S F-A-8F-E is output to each of the control devices.

FIG. 4 shows a specific example of this scan signal generating device 1.

The preceding floor signal generator 3 generates a binary preceding signal ADF-A-A which indicates the same floor signal as the elevator position when the elevator is stopped.
Output DF-E.

Also, the time 11.12.13 shown in Figure 2 when the vehicle starts running.
At timings such as , etc., the signal is switched to the preceding signal indicating the floor that preceded in the direction of travel one after another.

FIG. 5 is a concrete block diagram of this advance signal generating device 3, and FIGS. 8 and 9 are concrete circuit diagrams.

The calling device 4 registers the car calls CC for each floor, the ascending hall call and descending hall call signal HC for each floor, and also receives a call registration pulse signal CM in which the registered calls are serialized by the above-mentioned scan signal. -Output P.

A comparator 6 compares the scan signal with the elevator's preceding position signal and outputs a coincidence signal 5 which is used to generate the deceleration signal SD.
F=ADF, SF for creating the ascending operation signal UP > ADF, 5F (outputs ADF used for creating the descending operation signal DN) and is transmitted to the elevator operation control device 5.

The device 5 outputs a running signal RUN, a call reset pulse RP, etc. in addition to the signals SD, UP, and DN generated by the logic of the above-mentioned signals and the call registration pulse signal CM-P.

A travel distance calculation device 7 and an acceleration command device 8 constitute the essential parts of the present invention, and determine the maximum speed commensurate with the total travel distance in response to switching of the preceding position signal.

The output acceleration command 55S-812S is sent to the speed command device 1.
0, and is stored until the reset signal 5IR-812R output from the deceleration command device 9 is input, and is input to the elevator speed control device 2 as a maximum speed command.

As can be seen from FIG. 2, the elevator speed control device 2 controls the elevator to operate at a predetermined acceleration until the speed approaches the speed output from the speed command device 10.

However, the speed never exceeds the speed inputted by the speed commands 81 to S12, and when the elevator speed approaches the inputted maximum speed, a control function is provided to smoothly match the maximum speed with an acceleration smaller than the above-mentioned predetermined acceleration. ing.

Additionally, the floor to arrive at is determined and a deceleration signal SD is output.
A deceleration command signal 5IR-812R corresponding to the remaining travel distance to the arrival floor is output, and the speed commands are also turned off in a stepwise manner starting from the highest speed command.

At this time as well, the elevator speed is controlled to be smoothly decelerated by the device 2, and when the arrival floor is reached, the running signal RUN is turned off and the elevator is controlled to stop.

Next, we will discuss the preceding floor signal generator 3, which is closely related to this invention.
A specific example of this is based on the block diagram in Figure 5, the scan signal generator in Figure 4, the time chart in Figure 6, the floor setting diagram in Figure 7, and the circuit diagrams in Figures 8 and 9. I will explain it first.

The synchronous position pulse generation circuit 31 periodically scans the elevator position signal detected from the floor controller or directly from within the hoistway using the scan signal output from the scan signal generation device 1 shown in FIG. 4, and generates an elevator position pulse. Output CP-P.

This position pulse CP-P is input to the synchronous position read pulse generation circuit 32, and if the elevator is stopped and there is no directionality, it is input as is to the preceding floor generation circuit 34 as the read pulse LD-P.

When the read pulse LD-P is input, the scan signal at that time is read. Next, when the elevator enters the running state, the read pulse LD-P stops and the preceding pulse generation circuit 33 starts operating and generates the preceding pulse AD-. P1 is transmitted to the preceding floor signal generation circuit 34.

Each time the preceding pulse AD-P1 is input, the preceding floor signal moves one floor in the traveling direction.

FIGS. 8 and 9 show specific examples of each of these circuits.

Here, the synchronous position of the elevator is shown as being detected from the floor controller, and the fingers F1. It consists of F2 and segments for the floors installed opposite it.

As shown in Figure 7, the building where the elevator is currently installed has a total of 8 floors, 2 floors underground and 6 floors above ground, and the maximum rated speed of the elevator is 180 m/-.

Therefore, there are eight segments in total, one for each floor.

The reason why there are two fingers is to prevent poor contact and to generate a signal for at least one of the floors when the vehicle stops at an intermediate point between floors due to a power outage or the like.

The signals from the segments are sent to a predetermined location of the synchronous position pulse generation circuit 31 via an appropriate interface circuit for each floor (not shown, but the purpose is to convert the voltage to an integrated circuit or absorb noise). Connect to the input terminal of

The presence or absence of a signal at the input terminal specified by the scan signal S F-A-8F-E is output to the output terminal Q, and a position pulse CP is output.
-P.

Here, the elevator has stopped at the floor for a month, and the elevator has stopped at one floor.
Since it corresponds to floor F1D11, scan signal S
A pulse is generated when F-A-8F-E becomes "LHLHH".

This pulse is input to the read input terminal LD of the preceding floor signal generation circuit 34 through the gate 323, and is input to the data input terminal A.
-Read the scan signal "LHL)IH" connected to F.

This becomes 11 when expressed as a numerical value.

In other words, being on the first floor is expressed by the number 11.

Similarly, F2B on the second basement floor is 9, and FIB on the first basement floor is 10.
, F2 on the second floor above ground corresponds to 12.

Here, the gates 321, 322, 324 and the delay flip 70 tab 325 are necessary in case the elevator stops at an intermediate floor and a plurality of floor signal pulses are input to the gate 323.

Furthermore, for the same purpose, the scan order of the scan signal generator shown in FIG. 4 is configured to increase and decrease repeatedly.
5 is required.

The transition status of the scan signal is shown in the time chart in Figure 6.

Scan slots 5F-00U to 5F-003]U are the period of increase (hereinafter abbreviated as UP scan), and scan slots 5F-3]D to OOD are the period of decrease (hereinafter abbreviated as DN scan). ).

Assume now that the elevator has stopped between the second floor F1 and the second floor F2, and signals for both floors are being generated.

The first situation is a state in which the direction of travel is undetermined.

At this time, the direction signals UP and DN are both low, and gate 3
Since the output of 24 is also "L91", even if a negative read pulse LD-P is output, the output of the delay 7-rip 70-tube (hereinafter abbreviated as D-FF) 325 is not generated.

Furthermore, the outputs of gates 321 and 322 also remain at H".

That is, during the UP scan and the DN scan, the pulse LD-P read when scanning the first floor and the second floor becomes L'', and the scan signal at that time is read as one.

By configuring in this way, even the first floor name has 2
I also try not to respond to calls on the floor.

This is because the vehicle cannot operate smoothly with respect to the two floors because the vehicle is located at a position less than the predetermined travel distance.

Therefore, in such a case, a temporary call is automatically made to F3 on the third floor.

In response to this call, the elevator operation control device 5 sets the upward direction signal UP to "HI+".

This is transmitted to the gate 321 and changes from the first situation to a second situation.

In other words, during UP scan, scan signal 5F-F is “L”
Therefore, the output power of the gate 321 is 3"L".

Therefore, position pulse CP-P is applied only during DN scanning.
does not output a read pulse.

Furthermore, since the rising signal UPfJ5 is “H”,
Since the output of G-1-324 has become "H", when the read pulse due to the position pulse of the first second floor is generated, D-
Since the output of the FF becomes "H" and the gate 323 is inhibited, reading of the first floor is not performed, unlike the first situation.

Therefore, regardless of the scan timing, the elevator will run at any point and the signal RUN/S"H will be activated.
”, and even if reading of the synchronized position is stopped, the second floor will always be the departure floor.

That is, although the actual length is 4.5 m or more, assuming that the length is 4.5 m, it is possible to smoothly and correctly stop the train on the third floor using the operating curve with the child girder.

As a third situation, consider a case where the vehicle stops between the 4th and 3rd floors, and in this case a temporary call for the 1st floor is automatically made.

In this case, contrary to the second situation, the falling direction signal DN is "H"
Therefore, the first position pulse CC-P of the UP scan
Only the read pulse LD-P is transmitted as a read pulse LD-P, and the third floor is operated as a starting floor with a traveling distance of 9 m toward the first floor.

If you stop outside the door open zone like this,
By making temporary calls for the first and third floors, the elevator can be returned to its normal state.

The purpose of inputting the clock signal CK to the gate 323 is to prevent malfunctions due to variations in signal switching time between a plurality of scan signals and operation delay time of the synchronous position pulse generation circuit 31.

Next, the preceding pulse signal generation circuit 33 shown in FIG. 9 will be explained.

The preceding pulse AD-P1 is a pulse signal that provides timing for switching the preceding floor original signal.

Although the circuit shown in Figure 9 is quite complex,
As explained with reference to FIG. 2, this is necessary in order to create an optimal state without delay, which causes the optimum speed command curve to rise quickly at times 11, 12, 13, etc.

Assume that the building shown in FIG. 7 has a large number of elevators, such as four, installed in parallel.

For example, if a hall call on the second floor occurs during approximately 0.5 seconds from time t1 to time t5, it will cause no problem with the overall service even if the next elevator is serviced, just as if it occurred after time t2. Assume that □ does not occur.

In such a situation, the device shown in FIG. 9 can be made extremely simple.

For example, the scan slot signal 5F-00-U output from the scan signal generator, the signal SD obtained by negating the deceleration signal SD, and the running signal RUN are ANDed.

This 3-input Nant gate can be used.

In this case, the time points t2 to t5 shown in FIG. 2 are each compressed to the left, but this does not affect the elevator operating curve in any way.

Moreover, it is not related to this invention. However, since the operation of the device shown in FIG. 9 is related to the distance calculating device 7 and the acceleration command device 8, which are essential parts of the present invention, the operation will be explained below with reference to FIG. 10, which is an embodiment of the present invention.

The adder 71 and the gate 711 are connected to the preceding floor signal MADF-A-
It functions to convert ADF-E into inter-floor designation signals.

For example, when proceeding from the first floor F1 to the second floor F2, the signal D
N is L I? Therefore, the value 1 indicated by the preceding dark signal is
2 is directly input to the first converter 72, where it is converted into a binary distance signal indicating the inter-floor distance of 4.5 m between the first floor F1 and the second floor F2.

The converted distance signal is sent to one input terminal group I of the adder 73.
Input in A to IH.

Note that when the elevator advances from the second floor to the first floor, the descending direction signal DN is "H", and the first converter 7 outputs the numerical value 12 obtained by adding +1 to the numerical value 11 indicated by the preceding position signal.
Enter 2.

The other input terminal group 2A to 2H of the adder 73 receives a total mileage signal L-A-L-H which shows the accumulated distance in binary form.
The output of the digitizer 74 that stores .

The assigned distance signal is input to the second converter 81.82, which outputs acceleration commands S5S to 512S corresponding to the total traveling distance, which is the magnitude of the binary distance signal.

Although outputs such as Ql and Q3 are not used here, they may be used if necessary to make the maximum speed command pitch finer.

Next, the case where the vehicle travels from the first floor F1 to the sixth floor F6 shown in FIG. 7 will be explained using the time chart FIG. 11 as an example.

First, when a call for the 6th floor (car call or hall call) is generated and registered, the call registration pulse CM-P becomes "H" in the scan slot 1-8F-16.

On the other hand, since the elevator has stopped on the first floor, the value of the preceding position signal is 11.

Therefore, when the pulse CM-P is "H", the output of the comparator 6 is "H" only if SF>ADF, and the rising signal UP becomes "H".

When the door rollers, etc. are ready to run, the vehicle enters upward operation and outputs a run signal RUN.

As mentioned above, the advantage of the advance pulse generation circuit 33 shown in FIG. 9 is that it does not decide to go directly to the sixth floor F6 immediately after the vehicle travels.

For example, if either a call to the third floor F3 or an ascending hall call occurs before time t3 in the time chart, the vehicle responds to the call and then operates to the sixth floor.

This can be said to be a good service that is compatible with the shared ride system.

Immediately after going direct, the output 175-P of the gate 175 in FIG.
becomes ++H11, passes through or gate 174, and goes to gate 1
71, a capacitor C171, and a gate 170.

Here, a minute pulse (a pulse width wider than the width of the scan slot 5F-00 and smaller than the pulse width of the one-shot circuit ON2, which will be described later) is output at the rising edge of the signal 175-P.

This pulse passes through a gate 165 and a flip 70 knob 17 provided for the purpose of synchronizing the preceding timing with the scan.
Temporarily stored in 0.

Next, scan slot pulse 5F-00U and clock C
When both K become "H", the gate 164 outputs "H", and the gate 166 performs an AND with the output of the flip-flop 170 set by the output of the gate 175, and outputs "L". A first preceding pulse AD-P1 is outputted at time t1 via gates 154 and 167.

This pulse is input to the counting input terminal T of the preceding floor signal generation circuit 34 in FIG. The number changes to 12, which indicates the second floor.

That is, at time t1, as shown in the time chart of FIG.
HL" was switched to LLHHL.

Further, in parallel with this preceding operation, the speed command device 10 outputs speed commands 81 to S5 corresponding to 60 m/- at the same time as the vehicle is traveling.

The newly output position signal is input to the first converter 72 via the adder 71 and the gate 711 as described above, and the distance between the first floor F1 and the second floor F2 is 4.5 m. A distance signal corresponding to the distance signal is output and inputted to the adder 73.

Since the value of this temporary digitizer is zero, it is a one-shot circuit O
At the rising edge of the second preceding pulse AD-P2 generated by N2, a numerical value corresponding to the previous 4.5 m is counted in the digitizer 74.

This set distance signal L-B-L-F is input to the second converter 81, which outputs an acceleration command S7S with a speed of 105 m/- corresponding to 4.5 m, and outputs speed commands 85 to S7. .

Next, the running signal RUN power becomes 3 nH'', passes through timer T1 of time limit T, and gate 153, and then counter CTR.

cancel the reset of counter CTR2 and switch group S.
A timer T2 constituted by W1 to SW4 and the gate 150 is activated.

A group of switches is provided for the purpose of adjusting the time limit of the timer T2 in accordance with the acceleration of the elevator operating curve.

Assuming that the acceleration is 0.1 g, the time limit T2 of the timer T2 is adjusted to 0.5 seconds.

Time t2 when approximately T1+T2 time period has elapsed since the start of driving
If the second floor call or the second floor ascending hall call does not occur by then, the one-shot circuit will turn ON and the timer T will turn on.
2 outputs a pulse, and gates 154 and 16
7, the first preceding pulse A D -Pl is regenerated again, the preceding floor is switched to the third floor, and the adder 73 outputs the signal corresponding to 4, 5 m output from the first converter and the digitizer. An addition operation is performed with the distance signal already set in 74, and the resulting value corresponding to 9 m is applied to the second preceding pulse X5.
The number is placed in the digitizer 74 again using the second hei.

And acceleration command si of speed 150m/m corresponding to 9m
os is output from the second converter 82 and the speed command 88
~810 is output.

Furthermore, at time t3, 3.7 m is added and an acceleration command 512S of a speed of 180 m/- corresponding to i.-'2.7 m is output, and speed commands S11 and 812 are newly output.

After time t3, there is no need for acceleration, so the preceding operation every 0.5 seconds is stopped by prohibiting the gate 152 using the rated speed command 812, and instead the signal sw5 is used as a door zone or stop position signal. - A lead proportional to the movement of the elevator is carried out, utilizing p.

Here, the timer T3 was inserted to prevent the vehicle from moving ahead more than necessary, and is because the vehicle only needs to travel the distance required for deceleration from time t3.

Therefore, without responding to the pulse of the position signal 5W5-P generated when the elevator passes the second floor,
When the elevator reaches the level of the third floor, the gate 173 outputs "H" due to the pulse 14/, and the gate 173 outputs "H".
4, the one-shot circuit ON3 converts the pulse into a minute width pulse, and then passes through the gate 165 and sets the flip-flop 170.

Next, a preceding pulse is outputted to the scan slot pulse 5F-00U, and the preceding floor is switched from the fourth floor to the fifth floor.

Furthermore, if a call for the 5th floor occurs before the elevator reaches the 4th floor level 15', and the deceleration signal SD[ is not output and the gate 167 is inhibited, the preceding pulse AD-
P1 occurs, the preceding floor signals ADF-A-ADF-E are switched to "HLLLL", and the call registration pulse CM-P is "H".
” In the 5F-16 slot, the comparator 6 is 5F=
ADF is output to Htl, and the elevator operation control device 5 outputs a deceleration signal SD, which is transmitted to the deceleration command device 9 to perform smooth deceleration control toward the 6th floor.

Note that it is convenient if the three converters shown in FIG. 10 are a programmable one-read only memory that can be programmed according to the specifications of the destination.

Further, the circuit of gate 155 in FIG. 9 is required in a building where the floor spacing is even narrower than that in FIG. 7, or when controlling an elevator with a higher rated speed.

In short, it detects that the speed has fallen below the maximum speed curve ■1□ shown in Figure 2, and increases the total travel distance by giving it an additional lead.
It has the function of outputting an acceleration command that goes over a curve.

As described above, this embodiment has the advantage of being able to command the optimum maximum speed commensurate with the total travel distance at an appropriate timing without using a new movable mechanism or elevator speed detector.

FIG. 12 shows another embodiment of the invention,
The number of departing floors is entered in the digit register 75, and the entered starting floor number is transferred to the two converters 7 constituting the fourth converter.
Address input for 6 and 77 ~ A3 and enable human power E1
is input to E2.

Also, address input input of two converters 76 and 77 ~ A8
The preceding floor signal is input to.

The distance signal converted in this way is sent to the second converter 83.
This converts and outputs the maximum speed commensurate with the total distance traveled.

The converters 76, 77 are shown here as programmable read-only memories with tri-stated outputs.

Although this configuration allows the use of the adder 73 to be avoided, it also has the disadvantage that the programming capacity is proportional to the square of the number of service floors.

As is clear from the above description, according to the present invention, the inefficient drawbacks of conventional floor division operation can be solved with a simple circuit, and efficient elevator operation control can be performed.

[Brief explanation of drawings]

Figures 1 and 2 are elevator operating curve diagrams, Figure 3 is an overall block diagram of the elevator control device, Figure 4 is a circuit diagram of the scan signal generator, and Figure 5 is a diagram of the preceding floor signal generator. A block diagram, FIG. 6 is a time chart for explaining the operation of the device shown in FIG. 4, FIG. 7 is a building floor setting diagram,
Figures 8 and 9 are circuit diagrams of the preceding floor signal generator;
Fig. 0 is a circuit diagram showing one embodiment of the present invention, Fig. 11 is a time chart for explaining the operation of the circuit shown in Figs. 9 and 10, and Fig. 12 is a circuit diagram showing another embodiment of the invention. It is. Explanation of symbols, 3... Preceding floor signal generator, 7
... Mileage calculation device, 8 ... Acceleration command device, 72 ... First converter, 73 ...
・・Adder, 74・・・・Placeholder, 81.82・・
...Second converter.

Claims (1)

[Claims] 1. In a control device for an elevator that services multiple floors, a preceding position calculation means for searching a floor on which a call to be serviced is registered, a means for calculating a distance between the preceding position and a starting position; An elevator control device comprising means for determining a maximum speed suitable for making this distance the total travel distance before the end of acceleration.