JPS6326073B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an elevator door control device that pattern-controls an elevator door according to a predetermined deceleration pattern when the elevator door enters a door-closed deceleration zone.

As a drive source for elevator doors that performs such pattern control, a small DC motor whose speed can be easily controlled is generally used. The speed of small DC motors is controlled by a resistance control method that controls the current by sequentially switching the value of a resistor inserted in series with the armature depending on the door opening/closing position, or by using a power semiconductor control element such as a thyristor or transistor to control the door opening/closing position. It has the advantage that it can be easily realized using a voltage control method that controls the voltage depending on the voltage.

The opening and closing operations of elevator doors can be roughly divided into open, close, and restart.
There are three operating modes, and it is desired that smooth opening/closing operations be performed in each operating mode using a unique opening/closing pattern. Particular attention should be paid to the closing operation, as the closing pattern may be disrupted or the door may not be able to close completely due to passenger contact with the door, wind pressure, etc., or debris clogging the door rail groove. It takes.

The above will be explained in more detail with reference to the drawings.

FIG. 1 shows a conventional door control device. In this device,
The output signal 1 _a of the pattern generation circuit 1 is used to drive the door drive small DC motor 3 via the motor control circuit 2.
is driven and controlled. The pattern generation circuit 1 starts operating in response to an opening/closing command from the operation operation circuit 10.

FIG. 1 shows an example of a center-open door mechanism, in which an electric motor 3 opens and closes door panels 6 _a and 6 _b via a speed reduction mechanism 9, a lever 4, and door links 5 _a and 5 _b . Door panels _6a , _6b
is pushed in the closing direction by closers 7 _a and 7 _b attached to the hall door when the hall door and car door are engaged. As the door opens and closes, the door panel position detection circuit 8 receives the rotation angle of the lever 4 as input and generates a door panel position signal _8a .
This is input to the pattern generation circuit 1.

In this way, the door opening/closing operation is controlled in a feedforward manner by a series of detection control operations.

In recent years, door control has come to be performed using a voltage control method using power semiconductor elements in the motor main circuit. Under these circumstances, the role of the pattern generation circuit is important in order to obtain a smooth response, and if an abnormality occurs in the operation pattern output from this pattern generation circuit, Voltage control would also become meaningless. Against this background, the pattern generating circuit 1 having the configuration shown in FIG. 2 has been implemented.

When a door opening/closing command is given to point A from the driving operation circuit 10, the continuous pattern generation circuit 11 outputs a continuous pattern signal to point B via a relay contact CP _a , which will be described later. Contact CP _a is a pattern switching relay
The make contact of CP, which is closed when the door is initially opened or closed, is opened when the door enters the deceleration zone, and the break contact CP _b is closed instead. contact
When CP _b is closed, the operating voltage is applied to the deceleration pattern generating section 12 from the control power supply bus PC2.

The deceleration pattern generating section 12 is in principle a voltage dividing circuit, and in this example, the control power supply bus PC2 and NC
The voltage between the three voltage dividers DV1, DV2, DV3
This is a circuit that divides the voltage by dividing the voltage and selectively outputs the divided voltage. The first voltage divider DV1 is a fixed resistor
Consists of FR11 and variable resistor VR1.
The divided voltage v ₁ of the voltage divider DV1 taken out from the slider of VR1 is connected to the resistor FR12 and the relay contact R described later.
1 Output to point B via _a . Similarly, the second and third voltage dividers DV2 and DV3 are fixed resistors FR21
or FR22 and variable resistors VR2 or VR3, whose divided voltage _v2 or _v3 is resistor FR2.
2 to FR23 and relay contact R2 _a to R3
It is output via _a . Note that v ₁ > v ₂ > v ₃ is set.

Next, a relay circuit including the pattern switching relay CP will be explained with reference to FIG. Third
In the figure, XOPS is a deceleration relay for opening the door,
XCLS is a deceleration relay for door closing, OS1, OS2,
OS3, R1, R2, and R3 are deceleration pattern generation relays, and CP is a pattern switching relay, and each of these relays is excited by the voltage between a pair of DC control power supply buses PC1 and NC. A cam switch 11CS and a make contact DT _d of a door opening/closing relay DT, which is energized when the door is opened, are connected in series to the deceleration relay XOPS. deceleration relay
The cam switch 12CS and the break contact DT _e of the door opening/closing relay DT are connected in series to the XCLS. The deceleration pattern generation relay OS1 has each make contact XOPS a of the deceleration relays XOPS and XCLS _.
The parallel connection of XCLS _a and the break contact _OS2a of the deceleration pattern generation relay OS2 are connected in series, and the break contact _OS3a of the deceleration pattern generation relay OS3 _and the diode D1 are connected to the contact OS2a.
The series circuits are connected in parallel. This deceleration pattern generation relay OS2 is connected to a connection point between a contact _OS3a and a diode D1 via a diode D2, and is also connected to a cam switch 13CS so as to form a parallel excitation shunt. Cam switch 1 is installed in deceleration pattern generation relay OS3.
4 CS are connected in series. The pattern switching relay CP has a make contact for the door opening/closing relay DT.
DT _f and the break contact XOPS _c of the deceleration relay XOPS are connected in series, and the break contact DT _g of the door opening/closing relay DT is connected to both contacts DT _f and XOPS _c .
and the series connection body of break contact XCLS _c of deceleration relay XCLS are connected in parallel. The deceleration pattern generation relays R1, R2, and R3 are connected in parallel through the break contacts OS1 _a , OS2 _b , and OS3 _b of the deceleration pattern generation relays OS1, OS2, and OS3, respectively, and the make contacts XOPS of both deceleration relays XOPS and XCLS. _b or excited via XCLS _b .

The cam switches 11CS to 14CS are switches that open and close depending on the open/closed position of the door, and are included in the door panel position detection circuit 8, and operate so as to close at the solid line portion and open at the other portions according to FIG. 4.

Each make contact R1 _a , R2 a , R3 a of the deceleration pattern generating relays R1, _R2 , _R3 is introduced into the deceleration pattern generating section 12 (FIG. 2).

Now, the opening and closing of the door is performed in a similar pattern in both the opening and closing directions.Next, as an example, the closing operation will be schematically explained with reference to FIGS. 1 to 4.

The door closing operation starts on the condition that the cam switch 11CS is turned on, but at this time,
The door opening/closing relay DT is de-energized, and both deceleration relays XOPS and XCLS are not energized until the cam switch 12CS is turned on. Therefore, the pattern switching relay CP is energized via the contacts DT _g and XCLS _c , and the contact CP _a is turned on, so that the speed of the motor 3 is controlled based on the output of the continuous pattern generating circuit 11 . When the door is closed and cam switch 12CS is turned on at point S3,
Deceleration relay XCLS is energized. There the contact point
Since XCLS _c is turned off, pattern switching relay CP
is deenergized, contact CP _a turns off, and contact CP _b
turns on. At this time, both cam switches 13CS,
Since 14CS is also on, both deceleration pattern generation relays OS2 and OS3 are energized, and therefore deceleration pattern generation relay OS1 is not energized.
In this way, the deceleration pattern generating relay R1 is energized via the contacts XCLS _b and OS1 _a , and its make contact R1 _a (FIG. 2) is turned on. As a result, at point B, the voltage between the control power bus PC2 and NC is connected to the voltage divider DV consisting of the fixed resistor FR11 and the variable resistor VR1.
The voltage _v1 divided by 1 is output as a deceleration pattern signal via the resistor FR12 and the contact _R1a .
Variable resistor VR1 is used to adjust the pattern output.

Furthermore, the door closes and cam switch 13 is activated at point S2.
When CS turns off, deceleration pattern generation relay OS2
excitation is cut off. As a result, contact _OS2a returns (turns on) and deceleration pattern generation relay OS1 is energized. In this way, the deceleration pattern generation relay R2 is energized via the contact _OS2b , and the deceleration pattern generation relay R1 is deenergized via the contact _OS1a . Therefore, in FIG. 2, contact R1 _a is turned off and contact R2 _a is turned on. This time fixed resistance FR2
A deceleration pattern output is output from a shunt of a voltage divider DV2 consisting of a variable resistor VR2 and a resistor FR22 and a contact _R2a to a point B.

Next, when the cam switch 14CS is turned off at point S1, the excitation of the deceleration pattern generation relay OS3 is turned off. Therefore, contacts OS3 _a and OS3 _b both return and turn on, and on the other hand, the deceleration pattern generation relay
The deceleration pattern generating relay OS2 is energized while the energized state of OS1 continues, while the deceleration pattern generating relays R1 and R2 are de-energized and the decelerating pattern generating relay R3 is newly energized. As a result, contact _R3a turns on, and a voltage divider DV consisting of a fixed resistor FR31 and a variable resistor VR3 is connected to point B.
A new deceleration pattern output is output from the branch circuit No. 3 via the resistor FR32 and the contact _R3a .

Although the above description assumes a three-stage deceleration pattern, it is of course possible that there are two or four or more stages. A series of such pattern diagrams are shown in FIGS. 5 and 6. FIG. 5 shows the case when the door is closed, and FIG. 6 shows the case when the door is open.

As already mentioned, the following problems occur in the elevator door opening/closing control operation as described above.

One of them is that the door rail groove is clogged with foreign matter, which may cause the door to not close completely.
This is due to disturbance factors such as door panels being pushed and unable to close completely due to the influence of wind pressure, which has become a problem in high-rise buildings in recent years. The other type is a mechanical safety or phototube type safety that detects when a human body is within the door travel area when the door closes, or detects a change in capacitance to detect that a human body is near the door. This is an emergency situation in which the passenger protection detectors such as touchless door safety systems do not operate, and a person's body is trapped in the door and the door cannot be closed completely.

Even in a system that controls several elevators in a group, if the opening/closing time of the doors becomes longer, the service of the entire system will deteriorate, and the above-mentioned situation, that is, the situation where the doors cannot be completely closed, is undesirable. Conventionally, in cases like this, we considered the above-mentioned disturbance factor and the case caused by the human body separately, and in order to protect the human body caught in the first door, a predetermined period of time has elapsed after the command to close the door. If the closing operation is not completed, perform the reopening operation once, and if the reason why the closing operation is not completed is because the human body is caught in the door, open the door so that the human body can move away when the door reopens. It was then closed again to ensure the safety of passengers.

However, with the safety measures mentioned above, it is true that human safety is well protected, but on the other hand, disturbances such as foreign objects, especially disturbances that include time-varying elements such as wind pressure, may occur after the restart operation. Even when a closing command is given, the elevator does not close completely, and it becomes necessary to repeat the same opening/closing operation again, which tends to cause a decline in elevator service.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks and provide a more effective means for closing a door when the door does not close completely even after a certain period of time has passed after a command to close the door.

In order to achieve this object, the present invention provides a door re-closing operation means that detects when the closing operation is not completed within a predetermined time when closing the door, and causes the door to be opened once and then to perform the closing operation again; The present invention is characterized by being provided with a pattern up means for increasing the deceleration pattern in order to increase the torque in the door closing deceleration zone when the door re-closing operation operation means is operated. Explain in detail.

7 to 9 show an embodiment of the present invention.

FIG. 7 shows the operation circuit for the elevator door. This circuit includes a door open/close relay
DT, door timer XDT, door opening relay OP,
Door close relay CL, door close error detection timer
CLST, door close error detection relay CLS, door close completion detection relay CE, door close auxiliary relay RCLX
and door reclosing auxiliary relay RCL.
Each of these relays and timers is operated by voltage between a pair of control power bus lines PC1 (positive) and NC (negative). The door opening/closing relay DT is energized via the make contact DO _a of the door opening auxiliary relay DO (not shown) or the make contact CLS _b of the door closing abnormality detection relay CLS, and is activated by the door closing pushbutton switch (break contact) PDC, off-delay mold door timer
It is self-held via the make contact XDT _a of the XDT and its own make contact DT _a . door timer
XDT is excited through the door open confirmation limit switch 18CS, which opens when the door is fully opened, and the make contact _DTj of the door opening/closing relay DT.
The door opening relay OP is the make contact for the door zone detection limit switch RCC and the door opening/closing relay DT.
DT _b , and break contact of door closing relay CL
Excited via CL _a . Door close relay CL is
It is excited through the break contact DT _c of the door opening/closing relay DT and the break contact OP _a of the door opening relay OP. The door close abnormality detection timer CLST is
It is excited through the make contact CL _b of the door closing relay CL and the break contact CE _a of the door closing completion detection relay CE. Door close abnormality detection relay CLS
is connected in parallel to timer CLST through the make contact CLST _a of timer CLST. The door closing completion detection relay CE is energized via the door closing confirmation limit switch GLS. Door closing auxiliary relay RCLX is the make contact of relay CLS
Parallel circuit of CLS _a and its own make contact RCLX _a ,
and is energized via break contact CE _b of relay CE. The door re-closing auxiliary relay RCL is energized via the make contact CL _c of the door closing relay CL, the make contact RCLX _b of the auxiliary relay RCLX, and a resistor R. A capacitor C is connected in parallel to this auxiliary relay RCL. Here, the resistor R and the capacitor C are provided in order to cause the auxiliary relay RCL to function as an on-delay timer relay having a certain operating time limit. In addition,
The set time limit of the timer CLST is set to an appropriate time longer than the time required for normal door closing, for example, several times the door closing time.

FIG. 8 shows an embodiment of the door opening/closing pattern control circuit. Here, the same components as in FIG. 3 are designated by the same reference numerals, and the explanation of those parts will be omitted. The circuit in Figure 8 differs from the circuit in Figure 3 in that the deceleration pattern generation relays R1, R2, and R
This is only the portion of circuit 13 that includes 3. The difference is that in the circuit shown in Figure 8, the break contact DT _h of the door opening/closing relay DT, and the make contact of the auxiliary relay RCL.
The series circuit of RCL _a and break contact OS2 _c of deceleration pattern generation relay OS2 is connected in parallel to contact OS1 _a of deceleration pattern generation relay OS1, and the make contact DT _i of door opening/closing relay DT is connected in series to contact OS2 _a . is connected, contact OS3 _b
Break contact RCL _b of auxiliary relay RCL is connected in series with contact DT _i and OS2 _b .
The common connection point of contact RCL _b and the common connection point of contact OS3 _b must be short-circuited, and
The common connection point of RCL _a and OS3 _c is led to relay R2 via break contact OS3 _c of deceleration pattern generation relay OS3.

In the circuits shown in Figures 7 and 8, if a door closing command is issued, contact DO _a remains open, so door opening/closing relay DT is deenergized, and contact DTC is closed, so the door closes. closed relay
CL is excited. As a result, a close pattern generation command is issued to the pattern generation circuit 1 shown in FIG. 1, and at the same time, the contact CL _b is closed and the door close abnormality detection timer CLST is started. If there is no abnormality in the door closing operation, the door closing completion detection relay CE operates and contacts CE _a are opened, so the timer
CLST is not yet operational. this timer
_CLST operates for the first time when the door does not close completely due to a human body getting stuck in the door or load disturbances such as foreign objects or wind pressure. energizes and detects door closing abnormality detection relay CLS.

When this relay CLS operates, contact CLS _b closes and door opening/closing relay DT is energized. Therefore, the contact DT _b is closed, the door opening relay OP is energized, and the pattern generating circuit 1 is energized to restart the operation.
Issue an open pattern generation command. Also, when the door close abnormality detection relay CLS operates, contact CLS _a
The auxiliary relay RCLX operates through the contact
It self-holds via RCLX _a and prepares for the next door closing operation after restarting.

When auxiliary relay RCLX operates, its contacts
RCLX _b closes. At this time, the door close relay CL
If the auxiliary relay RCL is of the instantaneous type when the auxiliary relay RCL is not in the de-energized state, there is a risk that the door re-closing auxiliary relay RCL will operate via the contacts CL _c and RCLX _b . Since the auxiliary relay is
RCL will never end up working.

When the door opening operation is completed and the door opening confirmation limit switch 18CS is opened, the contact XDT _a is opened after a predetermined time period, and the door opening/closing relay DT is deenergized. When this relay DT is deenergized, the contacts
The door closing relay CL is re-energized via DT _c ,
Move to door closing operation. At the same time, auxiliary relay RCL operates with a slight on-delay time via contact CL _c .

Now, when the auxiliary relay RCL is energized and performs the door closing operation, and the door that has been operated according to the continuous pattern from the pattern generating circuit described above enters the door closing deceleration zone, the circuit shown in FIG. , cam switch 12CS closes and deceleration relay XCLS operates. At this time, as already explained with reference to FIG. 3, the cam switches 13CS,
14CS are both closed, both deceleration pattern generation relays OS2 and OS3 are also energized, and deceleration pattern generation relay OS1 is turned off. Therefore, the contact
Relay R1 is energized via OS1 _a , and voltage divider
The divided voltage v ₁ of DV1 is output to point B via contact R1 _a .

Now, in order to hold the door to the closed end while dealing with the load from wind pressure, foreign objects, etc. applied to the door, it is necessary to reach the next deceleration position S2, that is, the point where the cam switch 13CS opens, and then repeat the pattern. If it is lowered, it may not be able to close completely, especially in areas where a large load is applied near the closing end.

However, in the device of the present invention, when the cam switch 13CB is opened, the relay OS2 is deenergized.
Contact _OS2a is closed and relay OS1 is energized.
Here, when relay OS2 turns off, unlike the conventional case (Fig. 3), contacts DT _h , RCL _a and OS
In route _2c , even in the zone where the cam switch 13CS is open, the relay R1 continues to be energized and maintains the previous pattern level. thus,
The torque is increased compared to conventional models, and the door closes while dealing with the load.

Next, when the cam switch 14CS is opened at the S1 point, the relay OS3 is deenergized. Therefore contact OS3
Since _a is closed, relays OS1 and OS2 are energized. When relay OS3 turns off, contact OS2
_b is closed, relay R2 is energized, and the pattern is dropped one step at this fairly closed position. If you continue to send the same pattern to a closed door using the pattern that has been uploaded in this way, there is a risk that the restraining current will flow too much into the door drive DC motor 3, causing burnout or mechanical damage to it. be. In order to prevent this inconvenience, the completion of closing is confirmed by the door closing confirmation limit switch GLS at point S0, and the door closing completion detection relay CE is activated, and its contact CE _a is used to confirm the completion of closing.
remains off and also turns off relay RCL via contact CE _b . In this way, the contact
Of the excitation circuit of relay R2 formed via XCLS _b , DT _h , RCL _a and OS3 _c , relay RCL
Since contact RCL _a is opened, relay R2 is turned off. On the other hand, since contact RCL _b is closed, relay R3 is energized, contact R3 _a is closed, and a pattern determined by the divided voltage v ₃ is output to point B.
Suppresses the motor's restricted current.

The above pattern is shown in FIG. In the figure, the solid line is the pattern according to the present invention, and the broken line is the pattern according to the conventional device. In this way, by issuing a torque up signal at the closed end of the door, abnormal loads can be dealt with, and when the closing is completed, the locking current is reduced and damage to the motor is prevented.

As described above, according to the present invention, when door closing could not be completed in the past due to disturbance factors such as foreign objects or wind pressure at the point near the door closing end where the motor output is the smallest, the During the closing operation, the output signal of the pattern generation circuit is used as the door position detection signal to increase the torque of the motor in the deceleration zone, which improves the ability to close the door by dealing with disturbance loads, and in most cases, the door closes successfully. can be done. By returning the pattern output to the original normal pattern upon completion of door closing, it is possible to avoid a situation where the electric motor is damaged by the restricted current.

In the above embodiment, the case where the deceleration pattern generation section and its control section are configured using a relay having mechanical contacts has been explained, but the same function can be obtained by using a logic IC or an analog switch instead of such a relay. It is clear that it is possible to construct an electrical circuit with

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing the principle of a door opening/closing control mechanism to which the present invention is applied, FIG. 2 is a circuit diagram showing an example of a pattern generation circuit, FIG. 3 is a connection diagram of a conventional pattern control circuit, and FIG. Figure 5 is a diagram showing the operation of the door position detection cam switch, Figure 5 is a diagram showing the conventional closing pattern, Figure 6 is a diagram showing the conventional opening pattern, Figure 7 is a connection diagram of the door operation circuit, and Figure 8 is a diagram showing the conventional closing pattern. The figure is a connection diagram showing one embodiment of the door pattern control circuit according to the present invention, and FIG. 9 is a diagram showing the pattern when the door is reclosed according to the present invention. 1...Pattern generation circuit, 3...Door drive small DC motor, 8...Door panel position detection circuit,
10...Door operation operation circuit, 12...Deceleration pattern generation section, 13...Torque up pattern control circuit, XOPS, XCLS...Deceleration relay, OS1, OS
2, OS3, R1, R2, R3...Deceleration pattern generation relay, DV1, DV2, DV3...Voltage divider for adjusting deceleration pattern.

Claims (1)

[Scope of Claims] 1. In an elevator door control device that pattern-controls an elevator door according to a predetermined deceleration pattern when the elevator door enters a door closing deceleration zone, when the closing operation is not completed within a predetermined time when closing the door, a door re-closing operation operating means that detects the door and causes the door to close again after it has been opened; An elevator door control device characterized in that it is provided with a pattern up means for increasing the pattern.