JP3355913B2 - Elevator control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device having an elevator terminal end safety function.

[0002]

2. Description of the Related Art In elevators, Article 129-9, Paragraph 8 of the Building Standard Law enacts "When a car or a counterweight is likely to collide with the bottom of a hoistway, the car must be struck before it does not collide. Device for automatically controlling and stopping lifting and lowering ”. This is described in the explanation of the construction order, "Limit switches that operate near the top floor and the lowest floor are provided, and by opening these switches, the operation of the elevator in that direction is controlled (deceleration stop).
In addition, even if this device does not work, a final limit switch must be further provided in order to reliably stop the operation before the terminal floor is excessively moved. It is written.

FIG. 11 is a block diagram of a conventional example for realizing this. In the figure, 1 is an elevator car, 2 is a rope for hanging the car, and 3 is a car 1 on which the rope 2 is wound.
, The cam mounted on the car 1, 5 the lowest floor, 6 the highest floor, and 7 the middle floor. Reference numeral 8 denotes an end point switch (DS) at the lowest floor where the cam 4 is engaged and the contact is opened.
R) and 9 are end point switches (USR) on the top floor. Reference numerals 10 to 13 denote limit switches (DL, UL) and final limit switches (DOT, UOT) described in the explanation of the construction order. 14 is an elevator control panel, 15 is end point switches 8, 9 and limit switch 1.
0, 11 and final limit switches 12, 13
And a signal input unit for taking in signals from the control panel 14 for each switch.

[0004] A conventional elevator constructed in this manner is:
When the car 1 is moving down, the end point switch 8 (DS
R) operates, the corresponding signal input unit 15 (RDS
R), a signal is taken into the control panel 14 and the hoisting machine 3 is decelerated and stopped by a control function (not shown).
To the bottom floor. When the end point switch 9 (USR) operates while the car 1 is running up, the car 1 is similarly stopped at the top floor. Further, when the car 1 does not stop beyond the lowest floor or the highest floor, the limit switches 10 and 11 or the final limit switches 12 and 13 which are installed at places further over the road.
Operates, and this is controlled via the signal input unit 15 by the control panel 14.
Then, the hoist 3 is forcibly stopped without deceleration control to ensure the safety of the elevator at the terminal floor.

Incidentally, limit switches 10 (DL) and 11 (UL) are provided at both terminal floors as over-limit switches.
Final limit switches 12 (DOT), 13 (U
OT), but when the limit switch DL or UL is operated, it stops in the terminal direction and disables operation, but has the function of enabling operation on the opposite side. Also the final limit switch DO
T or UOT has a function of stopping in any direction to disable operation (not shown). This means that during a so-called manual high-speed operation (HAND operation) in which the operation is performed at a low speed for maintenance work or the like, the operation can be performed up to the limit switches (DL, UL). It is possible to continue.
Note that the next final limit switch is for surely stopping the operation when the vehicle goes too far. Also,
Although it is a special case of the above-mentioned conventional example, Japanese Patent Publication No. 6-655
No. 91 discloses an elevator control device that uses the above-mentioned limit switches and controls deceleration near the terminal floor.

[0006]

In the conventional elevator safety device as described above, the six switches and the control panel have six switches.
Number of signal inputs are required. However, in simple elevators such as small elevators and home elevators with low rated speeds, the number of switches and the number of signal inputs can be reduced to simplify the equipment. You can't get it. For example, even if two limit switches DL and UL are connected in series and fetched by one input unit 15, it is not known which switch has been operated, and therefore, the direction away from the end cannot be recognized. If the limit switches are reduced and the end switches (DSR, USR) are provided with the functions of the limit switches (DL, UL) at the time of the manual speed operation, the operation cannot be performed to the terminal floor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has a control device having a safety function of an elevator which has the same level of safety as before even if the number of switches and signal input portions of a control panel is reduced. The purpose is to provide.

[0008]

An elevator control apparatus according to a first aspect of the present invention has an input to a control operation section of a limit switch at one location and determines which limit switch has been operated. , carried out from the position of the car, which was stopped at the limit switch, manual speed operation mode after stopping
If a mode command is issued, the vehicle can travel in a direction opposite to the terminal direction in which the limit switch has operated.

In the elevator control apparatus according to a second aspect of the present invention, the input to the control operation unit of the limit switch is made a single point, and the determination of which limit switch has been operated is stopped by the limit switch. Performed from the positional relationship between the previous car position and the car position after stopping,
If there is a command of the manual speed operation mode after the stop, the vehicle can travel in the direction opposite to the terminal direction in which the limit switch is operated.

[0010]

[0011]

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. 1 to 8 show one embodiment of the present invention. FIG. 1 is a configuration diagram showing a switch and a signal input unit, FIG. 2 is a circuit diagram, FIG. 3 is a configuration diagram of an elevator,
4 is a block diagram of the control operation unit, FIG. 5 is a functional block diagram, FIG. 6 is a main flowchart of a part related to the present invention, FIG. 7 is a flowchart of car traveling stop and UL / DL operation determination, and FIG. 8 is UP / DN. 4 shows a flowchart of a traveling permission output. In the figure, the same components as those of the conventional example are denoted by the same reference numerals.

In FIG. 1, an end point switch 8 (DS
R), 9 (USR), limit switch 10 (DL),
11 (UL) and final limit switch 12
(DOT) and 13 (UOT) are provided at the same position on the hoistway as before. In FIG. 2, reference numerals 20 to 23 denote normally closed contacts of the switches 10 to 13, respectively, as the names indicate. Reference numeral 26 denotes a control calculation unit provided on the control panel 14. The control operation unit 26 includes three signal input units 15 RUDL, RDSR, and RUSR according to the input signals.

In FIG. 3, reference numeral 30 denotes an electric motor for driving the hoisting machine 3, reference numeral 31 denotes a pulse generator which is connected to the rotating shaft of the electric motor 30 and generates pulses in accordance with a unit rotation angle, and reference numeral 32 denotes a pulse generator from the pulse generator 31 to the electric motor. Pulses generated in accordance with the rotation of 30 are counted by a car position detector which detects a car position. In this example, the car 1 is detected to have a larger value as the car 1 goes to an upper floor. 32a is a car position detector 32
Is a data indicating the position of the car 1 and reference numeral 33 is a manual speed mode switch (HAND) for instructing a manual speed operation which is an operation mode for maintenance work or the like. 4, reference numeral 40 denotes a central processing unit (CPU); 41, a storage device (ROM); 42, a temporary storage device (RAM); 43, an input port serving as a signal input unit of the control operation unit 26;
An output port 4 is also a signal output unit. In FIG. 5, 50 is a position switch operation input means, 51 is a car position input means, 52 is a condition input means, 53 is a car stop judgment means, 54 is a traveling direction judgment means before stop, and 55 is a car stop command and restart permission. It is a determining means.

Next, the operation will be described. When the car 1 descends and approaches the lowest floor, the cam 4 provided on the car first
The end point switch of the SR is engaged and its contact 22 is opened. At this time, the signal input section (RDSR) 15 has its contact opened (of
f) Enter that. When the car is further lowered, the cam is engaged with the DL limit switch, and the contact 21 is opened.
Therefore, the signal input unit (RUDL) 15 inputs that the contact has been opened. Although the descending operation has been described, the same operation is performed when the vehicle reaches the top floor by the ascending operation.

In order to lower or raise the car, the motor 30 is driven by the control operation unit 26 and the car is moved up and down via the hoisting machine 3. At this time, since the movement of the car is caused by the rotation of the motor, the rotation of the motor is detected by the pulse generator 31 and the number of the pulses is counted by the car position detector 32, so that the movement amount of the car, that is, the position of the car Can be obtained from the output 32a of the car position detector. Also, the command of the manual speed operation mode is issued by the switch 33 (HAN).
The fact that D) is input is recognized by being input to the control calculation unit. In the control calculation unit 26, the CPU 40
Based on the program and data stored in M41, calculate according to the current input value from input port 43,
A command is issued from the output port 44 while partially storing the result in the RAM 42.

Next, the configuration of functions will be described with reference to FIG. First, the car position detector output 32a is input by the car position input means 51, and the car stop determination means 53 determines that the car has stopped because the car position data no longer changes. Note that the determination of the car stop can be obtained without using the car position data, but using a signal (not shown) of another control operation unit. In addition, the traveling direction of the car immediately before the stop is determined by the pre-stop traveling direction determination means 54 based on the car positions before and after the stop. The operation state of the position switch is input by the position switch operation input means 50, and the state of the switch (HAND) for instructing the manual speed operation mode is input by the condition input means 52. An elevator control device having a safety function that ensures the same safety as the conventional one by outputting a car stop command or an UP / DN running permission signal by making a determination by the car stop command and the restart permission determining means 55 and outputting the car stop command or the UP / DN traveling permission signal. can get.

This operation will be described with reference to the flowcharts of FIGS. FIG. 6 is a main flowchart of the present invention. In step S01, a routine for stopping driving and determining UL / DL operation is calculated by operation of a limit switch, and finally, a routine for UP / DN running permission output is calculated.

FIG. 7 is a flowchart showing the operation stop and UL / DL operation determination S.
13 is a flowchart showing the details of the process of FIG. Step S3
In step 1, it is determined whether the contact point of either UL or DL is off. If both of them are on, the process goes to step S38 to set the data "ULS" and "DLS" to "0". To end. If any of them is off, the process proceeds to step S32, in which a car stop command is issued, and the car is stopped. Next, it is confirmed in step S33 that the car has stopped. If not stopped, this routine is ended. If stopped, step S34
When the car position obtained by the car position input means 51 stops at a position lower than the lowest floor position "BOT", the process proceeds to step S35, where the data "DLS" is set to "1" and this routine is executed. To end. If the car position does not stop at a position lower than "BOT", the process proceeds to step S36,
If the car position is stopped at a position higher than the top floor position "TOP", the flow shifts to step S37 to set the data "ULS" to "1" and ends this routine. If the car position does not stop at a position higher than "TOP", this routine ends. This is a limit switch (UL, DL)
When the is operated, the car is immediately stopped, and "ULS" indicating which switch has been operated from the car position at the time of the stop
"DLS" data is set.

FIG. 8 is a flowchart showing details of the UP / DN running permission output S02. In step S41, S
As with 31, the contact point of either UL or DL is o
ff, and this routine is terminated if both are on. If any of them is off, the process proceeds to step S42, and in S42, it is determined that the command of the manual speed operation mode is issued similarly to S11, and when not issued, that is, when the HAND signal is not on, this routine is ended. I do. If the HAND signal is on, step S43
Then, it is determined that the data "DLS" is "1", and if it is "1", the process proceeds to step S44 to output an UP (rising operation) permission output signal. If it is not "1", the flow shifts to step S45 to determine that the data "ULS" is "1", and if it is not "1", this routine is ended. If "1", the process proceeds to step S46 to output a DN (downward operation) permission output signal. This is UL or D
When the L limit switch is operated, the vehicle is allowed to travel in a direction away from the operated terminal floor, that is, in a direction opposite to the terminal direction.

To summarize the above operation functions, during normal operation other than the manual speed operation mode, when the vehicle travels toward the terminal floor and the end point switches (USR, DSR) operate, deceleration stop control is performed and the terminal floor is controlled. To land. At this time, if the limit switch (UL, DL) is operated after passing the terminal floor, it is taken into the control calculation unit by the RUDL signal, and the subsequent operation is stopped. Further, in the manual speed operation mode, it is determined whether the switch of UL or DL is operated in response to the RUDL signal from the position of the car, and it is possible to travel in a direction opposite to the terminal direction. Can be prevented from being trapped in a car or a hoistway. That is, in the present embodiment, even if the number of signal input portions of the limit switch is reduced to one and the device is simplified, the same function as the conventional one can be obtained.

Embodiment 2 FIG. FIG. 9 is a view showing another embodiment of the present invention.
10 is a detailed flowchart of another example of the / DL operation determination S01. First, in step S51, UL or DL
Is determined to be off, and when both are on, the process proceeds to step S58, and the data "BSTOP" indicates the car position obtained by the car position input means 51 at that time. The data is stored, and “0” is set in the data “ASTOP”. Note that the car position data is counted so as to increase as going to the upper floor. Further, the data “ULS” and “DLS” are set to “0”.
And ends this routine. If either UL or DL is off, the process proceeds to step S52 to issue a car stop command to stop the car.

Next, it is confirmed in step S53 that the car has stopped. As a result of this confirmation, this routine is terminated if not stopped, but if stopped, the process proceeds to step S54 and data indicating the position of the stopped car is stored in data "ASTOP". Next, step S
If the flow proceeds to 55, and if "ASTOP-BSTOP", that is, the value obtained by subtracting the car position before stop from the stopped car position is not greater than zero, the flow proceeds to step S56 to set the data "DLS" to "1". If the value is larger than zero, the process proceeds to step S57, and the data “ULS” is set to “1”. After any of these settings, this routine ends.

That is, here, as in the first embodiment, it is not determined whether the UL or the DL has operated at the position of the car, but the traveling direction of the car is obtained from the change in the car position before and after the stop. , It recognizes that the DL has operated during the descending operation, and recognizes that the UL has operated during the ascending operation. Therefore, even in the situation where the absolute position of the car is unknown, the driving direction of the car can be recognized by the short-time pulse count before and after the stop and the driving permission in the direction away from the terminal floor can be given. It becomes possible, and maintenance work can be continued even if the absolute position of the car is lost due to installation, or any abnormality.

Embodiment 3 FIG. 10 is a diagram showing another embodiment of the present invention. Figure 2 in
Is equivalent to the circuit diagram of FIG. In the above, the contacts 23, 22 of the end point switches (USR, DSR)
Are RUSR and RDSR at independent signal input sections 15, respectively.
, But here, the contact point 22,
RUDS with one signal input unit by connecting 23 to the series
This is captured as an R signal. In this case, the number of signal input units can be reduced by one.

Therefore, although the detailed embodiment is not shown in a new diagram, it is omitted based on FIG. 9 showing stop of traveling and UL / DL operation discrimination, and FIG. 8 showing UP / DN traveling permission output. UDL signal is converted to UDSR signal, data "DLS"
Is read as "DSRS" and the data "ULS" is read as "USRS" in the same manner, so that it is possible to know which end point switch has been operated based on the traveling direction of the car at the time of stop. In FIG. 7 showing stop of traveling and UL / DL operation discrimination, in addition to the above, the position data “BOT” of the lowest floor is set to the limit switch D.
It can also be realized by reading the position data of the SR and the position data of the top floor “TOP” with the position data of the switch USR.

[0027]

As described above, according to the present invention, even if the number of input sections is reduced by connecting the contact points of limit switches or end point switches at both ends of the hoistway in series, the number of input sections can be reduced as in the conventional case. Security can be obtained. In other words, even if the contacts of the switches at both ends are connected in series and input is made at one input unit, it is at the car position after stopping by the operation of the limit switches, or at the time of operation of the limit switches. by the traveling direction of the car, came in recognition or of any of the termination switch is operated, since the only the end of the time of hand Dosoku operation mode to allow traveling in the opposite direction, that originally reach the final limit switch It is an abnormal time to operate during normal operation without
In such a case, the driving permission is not issued even in the direction opposite to the end, so that safety can be ensured.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an elevator control device of the present invention.

FIG. 2 is a circuit diagram of an elevator control device according to the present invention.

FIG. 3 is a configuration diagram showing an elevator control device of the present invention.

FIG. 4 is a configuration diagram showing a control operation unit of the present invention.

FIG. 5 is a functional configuration diagram of the elevator control device of the present invention.

FIG. 6 is a main flowchart showing the operation of the elevator control device of the present invention.

FIG. 7 is a flowchart showing an operation of stopping the traveling of the car and determining UL / DL operation according to the present invention.

FIG. 8 is a flowchart showing the operation of the UP / DN running permission output of the present invention.

FIG. 9 is a flowchart showing an operation of stopping the traveling of a car and determining UL / DL operation according to another embodiment of the present invention.

FIG. 10 is a circuit diagram of an elevator control device according to another embodiment of the present invention.

FIG. 11 is a configuration diagram showing a conventional elevator control device.

[Explanation of symbols]

1 elevator car, 4 cams, 5 bottom floor, 6 top floor, 8, 9 end point switch,
10, 11 limit switch, 12, 13 final limit switch, 26 control operation unit, 32 car position detector, 33 manual speed mode switch, 50
Position switch operation input means, 51 car position input means, 52 condition input means, 54 traveling direction determination means before stop.

Continuation of the front page (56) References JP-A-61-254480 (JP, A) JP-A-57-42468 (JP, A) JP-A-54-140342 (JP, A) JP-A-5-229761 (JP) JP-A-7-223378 (JP, A) JP-A-5-132255 (JP, A) JP-A 60-183773 (JP, U) JP-A 1-90770 (JP, U) JP-A 59-95063 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B66B 1/48 B66B 5/06 B66B 5/10

Claims (2)

(57) [Claims] 1. A limit switch provided at both the uppermost and lowermost ends of an elevator ascending and descending, and operated when a car heading toward the terminal has passed a predetermined amount of floor on the terminal floor, and further toward the terminal. and the final limit switch that operates when the excessive Te, or the car position in the up and down stroke
A manual speed operation mode is instructed in an elevator control device including a car position detector that detects from a movement amount of the car, and a control operation unit that inputs a contact signal of the limit switch and a car position of the car position detector. Switch and the switch
A condition input means for inputting a state of the pitch, and a squirrel position input means for inputting the car position of the car position detector, the control top and contact signal at the bottom of the limit switch as a single signal Position switch operation input means for inputting to the arithmetic unit, car stop means for stopping the car when the limit switch is operated by the position switch operation input means, and input from the car position input means
It determines which limit switch has been activated based on the stopped position of the car, and operates the uppermost limit switch .
If there is a command in the manual speed operation mode, the controller outputs a down direction operation permission and operates the lowermost limit switch .
An elevator control device comprising: a control operation unit including a restart permission determining unit that outputs a rising direction driving permission when a command for a manual speed driving mode is issued . 2. A limit switch provided at each of the uppermost and lowermost ends of the elevator ascending and descending, and operating when a car heading toward the terminal has passed a predetermined amount of floor on the terminal floor, and further toward the terminal. and the final limit switch that operates when the excessive Te, or the car position in the up and down stroke
A manual speed operation mode is instructed in an elevator control device including a car position detector that detects from a movement amount of the car, and a control operation unit that inputs a contact signal of the limit switch and a car position of the car position detector. Switch and the switch
A condition input means for inputting a state of the pitch, and a squirrel position input means for inputting the car position of the car position detector, the control top and contact signal at the bottom of the limit switch as a single signal Position switch operation input means for inputting to the arithmetic unit , car stop means for stopping the car when the position switch operation input means inputs that the limit switch has been operated, and a car position and a car position before the stop of the car. a stop before traveling direction determining means for determining the running direction of the car before the stop by the car position at rest, it is determined which of the limit switches from the running direction of the car before stopping the operation, the uppermost limit switch Operation, manual speed
If there is an operation mode command , output a descending operation permission,
This is the operation of the lower limit switch ,
A control device for an elevator, comprising: a control operation unit including a restart permission determining unit that outputs a rising direction driving permission when a mode command is issued .