JP3355912B2 - 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. 12 is a configuration 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 a lower limit switch (DSR) on the lowermost floor, which is engaged with the cam 4 and the contact is opened, and reference numeral 9 denotes a limit switch (USR) on the uppermost floor. Reference numerals 10 to 13 denote final limit switches (DL, UL, DOT, UOT) also shown in the explanation of the construction order. Reference numeral 14 denotes an elevator control panel, and 15 denotes a signal input unit for taking in signals from the limit switches 8, 9 and final limit switches 10 to 13 into the control panel 14 for each switch.

[0004] A conventional elevator constructed in this manner is:
When the car 1 is moving down, the limit switch 8 (D
When the SR 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 limit switch 9 (USR) operates while the car 1 is running up, the car 1 is similarly stopped at the top floor. In addition, basket 1
Does not stop over the lowest or top floor,
When the final limit switches 10 to 13 operate and are taken into the control panel via the signal input unit 15, the hoisting machine 3 is forcibly stopped without deceleration control to ensure the safety of the elevator at the terminal floor. .

The final limit switches 10
13 has two stages, DL and DOT and UL and UOT, at both terminal floors. When DL or UL of the first stage operates, it stops in the terminal direction and disables operation, but on the opposite side. Has a function to make it operable, and the second stage DOT or UOT has a function to stop in any direction to make it inoperable (not shown). This is inconvenient because in a so-called manual speed operation (HAND operation) in which the vehicle is operated at a low speed for maintenance work or the like, if the vehicle is decelerated and stopped by the limit switch, the vehicle cannot be driven to the terminal floor. Since the safety can be maintained even when driving up to the point, it is possible to operate up to the first stage final limit switch (DL, UL), and even if this switch operates, operation can be continued in the direction away from the terminal And Note that the final limit switch of the second stage is for surely stopping the operation when going too far. As a special case of the above-mentioned conventional example, Japanese Patent Publication No. 6-65591 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, two first-stage final limit switches DL,
Even if UL is connected in series and taken in by one input unit 15, it is not known which switch has operated, so
The direction away from the end cannot be recognized. In addition, the number of final limit switches, which are two-stage, is reduced to one, and the limit switches (DSR, USR) are replaced with the first-stage final limit switches (DL, U
When the function of L) is provided, it is not possible to drive 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]

The elevator control apparatus according to the first invention of the present invention reduces the number of final limit switches to only one at each end and reduces the number of final limit switches to one. or of discrimination one of the final limit switch is operated, done from the position of the car that was stopped in the final limit switch, hand after stopping
If there is a command in the dynamic speed operation mode, it is possible to run in the direction opposite to the terminal direction in which the final limit switch is operated.

In the elevator control apparatus according to the second aspect of the present invention, the number of final limit switches is reduced to one at each end, and the number of inputs to the control calculation unit is one. Judgment as to whether or not it has operated is made based on the positional relationship between the car position before stopping by the final limit switch and the car position after stopping, and if there is a manual speed operation mode command after stopping, the final limit This enables traveling in the direction opposite to the terminal direction in which the switch has been operated.

[0010]

[0011]

[0012]

[0013]

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. 1 to 9 are diagrams showing one embodiment of the present invention. FIG. 1 is a configuration diagram showing that the number of switches and signal input units is reduced from the conventional example, FIG. 2 is a circuit diagram, and FIG. FIG. 4 is a block diagram of a 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 a traveling region expansion operation determination, and FIG. Stop and UL / DL
FIG. 9 is a flowchart of an operation determination, and FIG. 9 is a flowchart of an UP / DN 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, a final limit switch 10 (DL) is provided at a position in consideration of the two final limit switches 10 (DL) and 12 (DOT) of the conventional example. The switch 11 (UL) and the switch 13 (UOT) of the example are provided at positions in consideration of the switch 11 (UL) and the switch 13 (UOT). In FIG. 2, 20 to 23
Are switches 10 to 13 as shown in the figure.
Normally closed contact. 24 is a manual switch (SDSR) for shorting the contacts of a switch (DSR), 25 is a manual switch (SUSR) for shorting the contacts of a switch (USR)
It is. 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 a motor for driving the hoisting machine 3, reference numeral 31 denotes a pulse generator which is connected to the rotating shaft of the motor 30 and generates a pulse in accordance with a unit rotation angle, and reference numeral 32 denotes a pulse generator 31 to a 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
It engages with the SR limit switch and its contact 22 opens.
At this time, since the contact (DSR) short-circuit switch 25 is open, the contact of the signal input unit (RDSR) 15 is open (of
f) Enter that. Next, when the short-circuit switch 25 is short-circuited, the signal input unit recognizes that the contact is closed (on). When the car is further lowered, the cam is engaged with the DL final 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.

For lowering or raising 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, which is a limit switch, is input by the position switch operation input means 50,
The state of the switch (HAND) for instructing the manual speed operation mode is input by the condition input means 52, and is judged by the car stop command and the restart permission judgment means 55 based on the information of each of the means indicated by 50 to 54, Car stop command or UP / DN
By outputting the traveling permission signal, it is possible to obtain an elevator control device having a safety function that ensures the same level of safety as in the related art.

This operation will be described with reference to the flowcharts of FIGS. FIG. 6 is a main flow chart of the present invention. In step S01, a routine for determining a driving range expansion operation that enables driving from the driving between both limit switches to the terminal at the time of manual speed driving is calculated. S
At 02, a routine for stopping driving and determining UL / DL operation is calculated by operation of the final limit switch, and finally, a routine for UP / DN running permission output is calculated.

FIG. 7 is a flowchart showing the details of the traveling region expansion operation determination S01. In step S11, it is determined that the command of the manual speed operation mode is issued, and when the command is not issued, that is, when the HAND signal is not on, the process proceeds to step S18, and the data “TEST” is set to “0”,
This routine ends. If the HAND signal is on, the process proceeds to step S12, where it is determined that "TEST" is not "1". If "1", the routine ends. If "TEST" is "0", proceed to step S13 to determine that the car is stopped. If not, set the data "USRC" and "DSRC" to "0" and end this routine. I do. If the car is stopped, the process proceeds to step S14, where it is determined that the USR switch is on.
RC "is set to" 1 ", and this routine ends.

When the USR is on, the flow shifts to step S15, where it is determined that "USRC" is not "1".
, The process proceeds to step S22, and “TEST” is changed to “1”
And ends this routine. If "USRC" is not "1", the flow shifts to step S16, and it is similarly determined that the switch DSR is on. When this switch is off, "DSRC" is set to "1" and this routine is ended. When DSR is on, step S1
7 to determine that “DSRC” is not “1”,
When it is “1”, the process proceeds to step S22 and “TES
T "is set to" 1 ", and this routine ends. "DS
If “RC” is not “1”, this routine is terminated. It should be noted that “TEST” shown here is “1”, indicating that the driving range expansion operation is permitted, and “USRC”
Or, if “DSRC” is “1”, switch U
Even if the SR or DSR signal indicates that it is on, it indicates that the limit switch has stopped at the operating position.

This indicates that the car has stopped at the position where the USR operates during the manual speed operation, and the USR has been turned on again during the stop. In other words, it indicates that the data “TEST” is set to “1” when the short-circuit switch SUSR is operated in order to extend the traveling area after stopping by the operation of the USR, that is, to enable traveling to the position of the final limit switch. This is the same when the DSR operates.
Therefore, in order to extend the manual travel region, the vehicle is operated until the limit switch operates, and then the short-circuit switch is short-circuited.

FIG. 8 is a flowchart showing the operation stop and UL / DL operation determination S.
11 is a flowchart showing the details of a second example. 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 the final limit switch (U
(L, DL), the car is immediately stopped, and "ULS" and "DLS" data indicating which switch has been operated from the car position at the time of the stop are set.

FIG. 9 is a flowchart showing details of the UP / DN running permission output S03. 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 "TEST" is "1", and if not, the routine is terminated. "TE
If "ST" is "1", the flow shifts to step S44 to determine that the data "DLS" is "1". If "1", the flow shifts to step S45 to output an UP (rising operation) permission output signal. . If it is not "1", the flow shifts to step S46, where it is determined that the data "ULS" is "1".
If not, this routine ends. If "1", the process proceeds to step S47 to output a DN (downward operation) permission output signal.

This is because when the UL or DL final limit switch is operated, in the manual speed operation mode and when the driving range expansion operation is performed, the direction away from the operated terminal floor, that is, the direction opposite to the terminal terminal direction. Is allowed to run. By the way, if the final limit switch is activated when the driving is not in the driving range expansion operation, the limit switch is on or the short-circuit switch of the limit switch is kept turned on. This is an unusual situation where it is not possible to do so, and permission to restart is not desirable.

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 limit switches (USR, DSR) operate, deceleration stop control is performed and the terminal floor is controlled. To land. At this time, the final limit switch (UL, D
When L) operates, it is taken into the control calculation unit by the RUDL signal, and the subsequent operation is stopped. In the manual speed operation mode, the conventional first stage final limit switch (UL,
DL) instead of limit switches (USR, DS)
R) is regarded as the first stage, and operation during that period is possible, but when it is desired to further operate to the terminal floor for maintenance work, etc., one of the limit switches is operated once, and By operating the corresponding short-circuit switch, the driving range expansion operation can be performed, and the operation can be performed to the position where the final limit switch operates. Even if this final limit switch is operated at this time, 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 the vehicle travels in a direction opposite to the end direction. Since it is possible, it is possible to prevent a maintenance worker from being trapped in a car or a hoistway. That is, in the present embodiment, the number of position switches as limit switches is changed from six to four, and the number of signal input units is changed from six to three.
Even if the number of devices is reduced to simplify the equipment, the same function as that of the related art can be obtained.

Embodiment 2 FIG. 10 is a view showing another embodiment of the present invention.
9 is a detailed flowchart of another example of the L / DL operation determination S02. First, in step S51, UL or D
It is determined that any one of the contacts L is off. If both are on, the process proceeds to step S58, and the car position obtained by the car position input means 51 at that time is stored in the data "BSTOP". The data "ASTOP" is set to "0". 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, unlike 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 of 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. 11 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 contact 23 of the limit switch (USR, DSR),
22 are independent signal input units 15 for RUSR and RD, respectively.
Although the signal was captured as an SR signal,
Connect 2 and 23 to the series and RU at one signal input
This is captured as a DSR signal. In this case, the number of signal input units can be reduced by one. It does not matter which switch is operated in order to use this contact as a position point for performing deceleration stop control during normal operation. 1. However, as described above, after the operation, the vehicle cannot be restarted in the terminal direction in principle, but must be able to travel in the opposite direction. Therefore, it is necessary to determine which limit switch has operated.

Therefore, although the detailed embodiment is not shown in a new figure, FIG. 10 showing stop of traveling and UL / DL operation discrimination, and FIG. 9 showing UP / DN traveling permission output.
UDSR signal and data "DL"
"S" for "DSRS" and data "ULS" for "USRS"
In the same manner, an UP / DN traveling permission signal for achieving the above-mentioned object can be obtained according to the traveling direction of the car at the time of stoppage. In addition, traveling stop and U
In FIG. 8 showing the L / DL operation determination, in addition to the above description, the bottom floor position data “BOT” is used as the position data of the limit switch DSR, and the top floor position data “TOP” is used. Can be realized by reading the position data of the switch USR.

[0033]

As described above, according to the present invention, the number of limit switches (limit switches or final limit switches) at the end of the hoistway can be reduced or the contacts of the limit switches can be connected in series to the input section. Even if the number is reduced, it is possible to obtain the same safety at the terminal end as in the conventional case. In other words, even if the contacts of the limit switches at both ends are connected in series and input is made at one input unit, at the car position after stopping by the operation of the limit switches, or at the time of operation of the limit switches the direction of travel of the car, can the recognition whether the limit switch of any of the termination is activated, since the only the end of the time of hand Dosoku operation mode to allow traveling in the opposite direction, reaching up to the original final limit switch The operation during the normal operation without any trouble is an abnormal time, and in such a case, the driving permission is not issued even in the direction opposite to the end, so that safety can be secured.

[0034]

[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 the traveling region expansion operation determination of the present invention.

FIG. 8 is a flowchart showing an operation of stopping traveling of a car and determining UL / DL operation according to the present invention.

FIG. 9 is a flowchart showing the operation of the UP / DN running permission output of the present invention.

FIG. 10 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. 11 is a circuit diagram of an elevator control device according to another embodiment of the present invention.

FIG. 12 is a configuration diagram showing a conventional elevator control device.

[Explanation of symbols]

 Reference Signs List 1 elevator car 4 cam 5 lowest floor 6 highest floor 8, 9 limit switch 10, 11 final limit switch 24, 25 short-circuit switch for 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 Pre-stop traveling direction judgment means 55 Car stop command and restart permission judgment means

Continuation of front page (56) References JP-A-61-254480 (JP, A) JP-A-57-42468 (JP, A) JP-A-54-140342 (JP, A) JP-A-8-333064 (JP) JP-A-7-223378 (JP, A) JP-A-60-183773 (JP, U) JP-A-1-90770 (JP, U) JP-A-59-95063 (JP, U) (58) Surveyed field (Int.Cl. ⁷ , DB name) B66B 1/48 B66B 5/06 B66B 5/10

Claims (2)

(57) [Claims] 1. A final limit switch which is provided at both the uppermost and lowermost ends of an elevator ascending and descending, and which operates when a car heading toward the terminal has passed a predetermined amount of floor on the terminal floor, The position of the car is the amount of movement of the car
A car position detector for detecting the position of the car, and a switch for commanding a manual high-speed operation mode in an elevator control device including a control operation unit for inputting a contact signal of the final limit switch and a car position of the car position detector. , Of the switch
A condition input means for inputting a state, and a squirrel position input means for inputting the car position of the car position detector, control arithmetic unit top and contact signal at the bottom of the final limit switch as a single signal Position switch operation input means for inputting the final limit switch operation to the car, and a car stop means for stopping the car when the final limit switch is operated by the position switch operation input means.
Determining one of the final limit switch is operated by the car stop position input from the force means, an act of final limit switch top, manual
The control operation unit includes a restart permission determination unit that outputs a descending operation permission when there is a command for the high speed operation mode and outputs an ascending direction operation permission when the final limit switch is at the lowermost position. Elevator control device. 2. A final limit switch, which is provided at both the uppermost and lowermost ends of an elevator ascending and descending, and is operated when a car heading toward the terminal has passed a predetermined amount of floor at the end of the elevator. The position of the car is the amount of movement of the car
A car position detector for detecting the position of the car, and a switch for commanding a manual high-speed operation mode in an elevator control device including a control operation unit for inputting a contact signal of the final limit switch and a car position of the car position detector. , Of the switch
A condition input means for inputting a state, and a squirrel position input means for inputting the car position of the car position detector, control arithmetic unit top and contact signal at the bottom of the final limit switch as a single signal Position switch operation input means for inputting to the position switch operation input means , a car stop means for stopping the car when the final limit switch is operated by the position switch operation input means, a car position and a car stop before the car stops. A traveling direction determining means for determining the traveling direction of the car before the stop based on the position of the middle car, and a final limit switch which determines which of the final limit switches has been operated from the traveling direction of the car before the stop, and Operation in the manual speed operation mode
Outputs lowering direction operating license if there is, an act of the bottom of the final limit switch, the manual speed operation mode
An elevator control device comprising a control operation unit including a restart permission determination unit that outputs a rising direction driving permission when the instruction is issued .