JP2008156092A - Elevator control system, two-way door elevator control system, and emergency elevator control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To quickly and easily detect the occurrence of a short-circuit trouble if the trouble occurs in any of a hall door switch and a car door switch which output door full-close detection signals, respectively. <P>SOLUTION: A discrimination means for door switch trouble 5 discriminates whether a defective door switch is present or not according to a signal input from an input circuit for hall door switch detection signal 2 and an input circuit for car door switch detection signal 3 while a detection signal indicating that a car door is at the full-close position is input from a car door position detection means 8. When a full-close detection signal is input from the input circuit 2, a trouble occurs in any of a hall door switch HSW1, HSW2 to HSWn. When a full-close detection signal is input from the input circuit 3, a trouble occurs in a car door switch KSW. The trouble information is stored in a trouble information storage means 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an elevator control system, a two-way door type elevator control system, and an emergency elevator control system. More specifically, the present invention relates to a short-circuit abnormality occurring in a hold door switch and a car door switch that output a door full-closed detection signal. It relates to the technology to detect.

  All elevator doors and car doors must be fully closed while the elevator is in operation, and these doors are opened when the car arrives at the floor where it stops and stops This is only the case. The fully closed state of these doors is detected by a hold door switch and a car door switch attached to these doors, and a system for monitoring elevator abnormalities based on these detection signals is constructed. (For example, see Patent Document 1).

  FIG. 6 is a configuration diagram of a conventional elevator control system showing a connection state between a general hold-a switch and a car door switch. A safety circuit SAC is connected to a power supply device not shown. The safety circuit SAC is, for example, a governor switch for detecting that the lowering speed of the car exceeds a predetermined speed, or a safety link switch for forcibly stopping the elevator at that time, and the car is a hoistway. It is a circuit composed of a switch for detecting a dangerous state of the elevator and ensuring safety such as a limit switch for detecting that the terminal position has been reached.

  A hold-a-switch series connection circuit SEC is connected to such a safety circuit SAC. The hold-a-switch series connection circuit SEC is composed of a plurality of hold-a-switches HSW1, HSW2,..., HSWn connected in series. A car door switch KSW is connected to the hold door switch series connection circuit SEC, and the car door switch KSW is connected to the elevator control device 101.

  The hold door switches HSW1, HSW2, ..., HSWn are turned on when the corresponding hold door on each floor is in the fully closed state and output a fully closed detection signal. The car door switch KSW When the door is fully closed, it is turned on and outputs a fully closed detection signal. The resistor R connected between the car door switch KSW and the elevator control device 101 is for increasing the voltage level of the detection signal sent to the elevator control device 101 and improving the transmission reliability. is there.

  If the elevator control device 101 is an elevator system of a type in which a machine room is installed, the elevator control device 101 is located in the machine room. Etc. are to be installed. The elevator control device 101 has an elevator operation control circuit 102 that controls opening / closing of a car door, calling response, and various other functions.

  The elevator operation control circuit 102 drives the door motor 103 to open and close the car door when a passenger gets on and off the car. The car door position detecting means 104 detects the car door position by measuring the rotation amount of the rotating shaft of the door motor 103 at this time, for example, and outputs a detection signal to the elevator operation control circuit 102. The elevator operation control circuit 102 performs car door opening / closing control based on the input of the door position detection signal.

  Next, the operation of FIG. 6 will be described. For example, if the car is in the door open standby state on the first floor (assumed to be the lowest floor), the elevator operation control circuit will be off because the lower floor hold door switch HSWn and car door switch KSW are off. Reference numeral 102 does not input a fully closed detection signal. Therefore, the elevator operation control circuit 102 does not move the car in this state.

  However, when the passenger gets into the car and presses the car call button in the car (for example, the destination floor is the top floor), the elevator operation control circuit 102 drives the door motor 103 to cause the car door to close. . At this time, the car door position in the range from the fully open position to the fully closed position is detected by the car door position detecting means 104, and the elevator operation control circuit 102 controls the drive of the door motor 103 based on this detection.

  When the car door is fully closed, the car door switch KSW is turned on. However, since the lowermost floor door engaging with the car door is also fully closed, the hold door switch HSWn is also turned on. Therefore, all the hold door switches HSW1, HSW2,..., HSWn of the hold door switch series connection circuit SEC are turned on, and the car door switch KSW is also turned on, so that the elevator operation control circuit 102 inputs a fully closed detection signal. The car can be moved from the bottom floor to the top floor.

  When the car arrives at the top floor, the elevator operation control circuit 102 drives the door motor 103 to cause the car door to open. This allows passengers in the car to get down to the top floor hall. At this time, since the car door is fully opened, the car door switch KSW is turned off, and the uppermost holder engaged with the car door is also fully opened, so that the hold door switch HSW1 is also turned off. Therefore, the elevator operation control circuit 102 is in a state where a fully closed detection signal is not input, and the car cannot be moved.

As described above, the elevator operation control circuit 102 is in a state where the fully closed detection signal is input, that is, in a state where all of the hold door switches HSW1, HSW2,..., HSWn and the car door switch KSW are turned on. If only one of the switches can be moved, and any one of the switches is off, it is considered that a dangerous situation has occurred with the doors open on some floor, and the car Is not allowed to move.
Japanese Patent Laid-Open No. 10-236744

  According to the configuration of the conventional system in FIG. 6, the elevator operation control circuit 102 is in a fully closed state even though the elevator operation control circuit 102 controls the fully closed operation on the door of the car that is stopped on a certain floor. If one of the doors is detected, that is, if any one of the hold door switches HSW1, HSW2,..., HSWn and the car door switch KSW is off, to ensure passenger safety In addition, the operation of the elevator is prohibited, and if the elevator is in operation, the operation is immediately stopped. Then, after the maintenance worker finds the abnormal part and completes the recovery work for the abnormal part, the operation of the elevator is resumed.

  However, sometimes, a short circuit accident occurs in any part of the signal input path of the elevator operation control circuit 102, and the elevator operation control circuit 102 is not actually closed even though all doors are not fully closed. A fully closed detection signal may be input. In such a case, the conventional configuration of FIG. 6 has a problem that it is difficult to specify the location where the short circuit accident occurs.

  A typical short circuit abnormality is the welding of a door switch. If the door breaks down while the door switch is welded, a serious accident may occur. For example, when welding occurs in a hold door switch on a certain floor, the elevator operation control circuit 102 does not have all the hold doors and car doors even if the floor hold door is actually open. The elevator operation is controlled by determining that the valve is in the fully closed state. Since the hold door and the car door are engaged with each other and open and close at the same time, the occurrence of such a switch welding accident does not immediately lead to a serious accident. If the failure of the engagement mechanism overlaps during welding, the elevator operation is performed in a very dangerous state. Therefore, it is necessary to take appropriate measures such as finding such a door switch weld as soon as possible and replacing it with a new one.

  In addition to the door switch welding, in addition to the door switch being welded, the location where the door switch is sandwiched due to damage to the wiring material, etc., or water drops from the upper hole to the lower hole during cleaning of the hall The door switch may be short-circuited due to falling. In the configuration of FIG. 6, the length of the wiring material becomes very long, so it is very difficult to find a place where such a short circuit abnormality occurs. In other words, the cable connecting the lower floor hold door switch HSW1 and the car door switch KSW is actually a long distance via the control panel (usually the upper position on the uppermost floor) housing the elevator control device 101. Since the total length of the cable is very long, which is several times the hoistway height, it takes a lot of labor and time to identify the short-circuit point.

  The present invention has been made in view of the above circumstances, and when a short-circuit abnormality occurs in either a hold door switch or a car door switch that outputs a door full-closed detection signal, the occurrence of the abnormality can be quickly and easily performed. It is an object to provide an elevator control system that can be detected.

  As means for solving the above-mentioned problem, the invention according to claim 1 is formed by connecting in series a hold-a switch of each floor that outputs a hold-a fully closed detection signal when the hold door is in a fully closed state. Holder switch series connection circuit, car door switch that outputs a car door full-closed detection signal when the car door is fully closed, and the door position in the range from the fully open position to the fully closed position of the car door The car door position detecting means for detecting the car door and the car door position detecting signal indicating that the car door is in the fully open position from the car door position detecting means, and the hold door fully closed detection from the hold door switch series connection circuit. When a signal is input, or when a car door full-closed detection signal is input from the car door switch, it is determined that an abnormal door switch exists and the elevator is Characterized by comprising a an elevator control device to stop the operation of the.

  According to a second aspect of the present invention, in the first aspect of the invention, the elevator control device is configured to receive the hold door full-closed detection signal or the car during input of a car door position detection signal indicating that the elevator control device is in the full-open position. It has a door switch abnormality determining means for determining that an abnormal door switch exists on the condition that the state in which the door full-closed detection signal is input continues for a predetermined time or more.

  According to a third aspect of the present invention, in the first aspect of the present invention, the elevator control device is capable of specifying information on which side of the hold door switch side or the car door switch side is abnormal, and a hall. In the case of an abnormality on the door switch side, there is provided an abnormality information storage means for storing abnormality information including at least information that can identify a floor related to the abnormality.

  According to a fourth aspect of the present invention, in the first aspect of the present invention, the elevator control device receives a hold-a switch detection signal input for inputting a hold-a full-close detection signal or a non-detection signal from the hold-a switch series connection circuit. And a car door switch detection signal input circuit for inputting a car door full-closed detection signal or a non-detection signal from the car door switch.

  According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the hold-a switch detection signal input circuit includes a first hall-side input circuit in which an input-side common connection point is provided in the elevator control device, The car door switch detection signal input circuit includes a first car side input circuit and a second car side provided with an input side common connection point in the elevator control device. The elevator control device is configured by an input circuit when the input signals of the first hall side input circuit and the second hall side input circuit are different from each other, or the first car side input circuit and If the input signals of the second car side input circuit are different from each other, the operation is continued using the input signal of the input circuit on the side determined to be normal, and a caution alarm is issued. It is characterized in.

  According to a sixth aspect of the present invention, there is provided a front-side hall formed by connecting front-side holder switches on each floor that output a front-side holder full-closed detection signal when the front-side holder is in a fully closed state. A door switch series connection circuit, a front car door switch that outputs a front car door full close detection signal when the front car door is fully closed, and the front car door fully opened position to the fully closed position. A front car door position detecting means for detecting the door position in the range up to and a back side hold door switch for each floor that outputs a back side hold door full close detection signal when the back side hold door is in a fully closed state. A rear-side hold door switch series connection circuit formed in series and a rear-side car door switch that outputs a rear-side car door full-closed detection signal when the rear-side car door is fully closed. H, rear-side car door position detecting means for detecting the door position in the range from the fully open position of the rear side car door to the fully closed position, and the front side car door from the front side car door position detecting means to the fully open position. When a front-side hold door fully-closed detection signal is input from the front-side hold door switch series connection circuit, or from the front-side car door switch, When a car door full-closed detection signal is input, it is determined that an abnormal front-side door switch exists and the elevator operation is stopped, and the rear-side car door is in the fully-open position from the back-side car door position detecting means. The back side hold door fully closed detection signal was input from the back side hold door switch series connection circuit while the back side car door position detection signal was input. Or an elevator control device that determines that there is an abnormal back side door switch and stops the operation of the elevator when a back side car door full-closed detection signal is input from the back side car door switch. It is characterized by that.

  The invention according to claim 7 is the invention according to claim 6, wherein the front-side holder and the front-side car door, and the back-side holder and the back-side car door are both on the front side and the back side. The door-opening operation is not performed simultaneously, and the front-side hold door switch series connection circuit and the rear-side hold door switch series connection circuit are connected in series, and the front-side car door switch and the rear side A car door switch is connected in series.

  According to an eighth aspect of the present invention, there is provided a hold-a-switch series connection circuit formed by connecting in series a hold-a switch of each floor that outputs a hold-a fully-closed detection signal when the hold-a is in a fully-closed state; A car door switch for outputting a car door full-closed detection signal when the door is in a fully-closed state, a car door position detecting means for detecting a door position in a range from the fully open position of the car door to the fully closed position, When a car door position detection signal indicating that the car door is in the fully open position is input from the car door position detection means and a hold door full close detection signal is input from the hold door switch series connection circuit, or the car door Elevator control device that stops elevator operation when an abnormal door switch is detected when a car door full-closed detection signal is input from the switch , A fire-fighting operation switch that is manually operated during a fire fighting activity, and a hold-a switch side bypass circuit and a car door switch-side bypass circuit that are connected in parallel to the hold door switch series connection circuit and the car door switch, respectively. A normally open contact that forcibly inputs a door full-closed detection signal to the elevator control device regardless of the actual state of the door switch by an on-operation based on the operation of the operation switch at the time of firefighting; Connected to each input side and each output side of the switch series connection circuit and the car door switch, the hold door switch series connection circuit and the car door switch are connected to each input side by an off operation based on the operation of the operation switch at the time of fire. And a normally closed contact for separating the circuit and each output side circuit.

  The invention according to claim 9 is the invention according to claim 8, wherein the operation switch at the time of fire fighting is installed in the vicinity of the hold floor of the predetermined floor and is used to call back the elevator car to the predetermined floor, or in the elevator car It is an emergency operation switch installed in.

  According to the present invention, even if the detection signal from the car door position detection means indicates the fully open position, it is determined that an abnormal door switch exists when the fully closed detection signal is input. The occurrence of an abnormal door switch can be quickly detected. In addition, since the input path of the fully closed detection signal is divided into the hold door switch series connection circuit and the car door switch, it is possible to detect whether the hold door switch side abnormality or the car door switch side abnormality. In addition, in the case of an abnormality on the hold-a switch side, it is possible to easily identify which switch it is.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the same components as those shown in FIG. 6 are denoted by the same or similar reference numerals, and redundant description is omitted.

  FIG. 1 is a configuration diagram of an elevator control system according to a first embodiment of the present invention. In this figure, the hold door switch series connection circuit SEC and the car door switch KSW branch from a common connection point P0 formed on the output side of the safety circuit SAC. The branched hold door switch series connection circuit SEC and the car door switch KSW are respectively connected to the hold door switch detection signal input circuit 2 and the car door switch detection signal input circuit 3 in the elevator control device 1. The resistor Ra on the hold door switch series connection circuit SEC side and the resistor Rb on the car door switch KSW side are the same as the resistor R in FIG.

  The detection signals input by the hold door switch detection signal input circuit 2 and the car door switch detection signal input circuit 3 are output to the elevator operation control circuit 4 having the door switch abnormality determination means 5 and the abnormality information storage means 6. It has become. The elevator operation control circuit 4 controls the door motor 7 based on a detection signal from the car door position detecting means 8 to open and close the car door.

  The door switch abnormality determination means 5 is configured to receive the hold door switch detection signal input circuit 2 and the car door switch detection signal during a period in which a detection signal indicating that the car door is in the fully open position is input from the car door position detection means 8. Based on the signal input from the input circuit 3, it is determined whether or not there is an abnormal door switch.

  That is, if all the switches of the hold door switches HSW1, HSW2,..., HSWn and the car door switch KSW are normal, a signal indicating that the car door is in the fully open position is sent from the car door position detecting means 8 to the elevator operation control circuit. When 4 is input, both the signals from the hold-a switch detection signal input circuit 2 and the car door switch detection signal input circuit 3 should be OFF signals (fully closed non-detection signals). Nevertheless, if the elevator operation control circuit 4 is receiving an ON signal (full-closed detection signal) from either the hold-a switch detection signal input circuit 2 or the car door switch detection signal input circuit 3, This is because an abnormality such as welding has occurred in one of the hold door switches HSW1, HSW2,..., HSWn and the car door switch KSW, or a short circuit abnormality has occurred in the cable connected to those switches. The cause is considered to be. Therefore, the elevator operation control circuit 4 stops the operation of the elevator in such a case.

  However, in the present embodiment, the door switch abnormality determining means 5 determines that the abnormality is a predetermined state in which an ON signal is input from the hold door switch detection signal input circuit 2 or the car door switch detection signal input circuit 3. It is assumed that it lasts longer than a certain time (a time of several tens of milliseconds to several hundreds of milliseconds). This takes into account the influence of noise, the operation delay of the door switch, and the like. The door switch abnormality determining means 5 has a timer counter (not shown) for measuring the predetermined time.

  The abnormality information storage means 6 is a means for storing information relating to an abnormality when the door switch abnormality determination means 5 determines that an abnormal door switch exists. For example, if a fully closed detection signal is input during the input period of a signal indicating that the car door is in the fully open position from the car door position detecting means 8, the hold door switch detection signal input circuit 2 or the car door switch is detected. Information about which one of the signal input circuits 3 is input is stored. If a fully-closed detection signal is input from the hold-a-switch detection signal input circuit 2, information on how many floors are abnormal is stored based on detection of the current position of the car. It is supposed to be.

  Next, the operation of FIG. 1 will be described based on the flowchart of FIG. However, the output signal of the safety circuit SAC during the elevator operation is always an ON signal.

  For example, if the car is now in a state of rising from the lowest floor and arriving at the top floor, the elevator operation control circuit 4 outputs a door opening command and starts driving the door motor 7 (step 1). Then, the door switch abnormality determining means 5 receives the signal from the car door position detecting means 8 and detects the car door position during the door opening operation at this time (step 2), and the car door is detected from the fully closed position. It is determined whether or not it has moved to the fully open position (step 3).

  When it is determined that the car door has reached the fully opened position, the door switch abnormality determining means 5 sets a timer counter (step 4), and detects each of the hold door switch detection signal input circuit 2 and the car door switch detection signal input circuit 3. A signal is input (step 5). Then, it is determined whether or not there is a fully closed detection signal (ON signal) among these detection signals (step 6). When there is no fully closed detection signal (“NO” in Step 6), all door switches of the hold door switches HSW1, HSW2,..., HSWn and the car door switch KSW and the input paths from these door switches are normal. The operation is continued as it is (step 7).

  However, if there is a fully closed detection signal (“YES” in step 6), that is, if an ON signal is input from either the hold door switch detection signal input circuit 2 or the car door switch detection signal input circuit 3, the door The switch abnormality determination means 5 waits for a predetermined time to elapse, that is, waits for the timer counter to expire (step 8), and determines that an abnormal door switch exists (step 9).

  If the door switch abnormality determining means 5 receives the fully closed detection signal from the hold door switch detection signal input circuit 2, the door switch abnormality determination means 5 indicates that there is an abnormality in the input path from the hold door switch series connection circuit SEC. If the abnormality information is stored in the abnormality information storage means 6 and the fully closed detection signal is input from the car door switch detection signal input circuit 3, there is an abnormality in the input path from the car door switch KSW. Is stored in the abnormality information storage means 6 (step 10). If a fully-closed detection signal is input from the hold-a-switch detection signal input circuit 2, information on how many floors are abnormal is stored based on detection of the current position of the car. Let

  Thereafter, the elevator operation control circuit 4 notifies the terminal device in the management room or the elevator monitoring center that an abnormality has occurred (step 11), and stops the operation of the elevator (step 12).

  Thus, according to the present embodiment, when the elevator operation control circuit 4 inputs the fully closed detection signal even though the detection signal from the car door position detecting means 8 indicates the fully opened position, the door Since the switch abnormality determining means 5 determines that there is an abnormal door switch, it is possible to quickly detect the occurrence of a door switch abnormality such as welding. In addition, the input path of the fully closed detection signal is divided into the hold door switch series connection circuit SEC and the car door switch KSW, so the hold door switch HSW1, HSW2, ..., HSWn side error or the car door switch KSW side error In the case of an abnormality on the hold-a switch side, it is possible to easily identify which switch it is.

  Further, according to the present embodiment, the door switch abnormality determining means 5 stores the abnormality information in the abnormality information storage means 6 and notifies the management room, the elevator monitoring center or the like of the occurrence of the abnormality. Or the maintenance staff can rush to the site immediately, and after confirming the contents of the abnormality by the abnormality information storage means 6, it is possible to take appropriate measures quickly and easily such as replacing the abnormal door switch with a new one. Become.

  FIG. 3 is a configuration diagram of an elevator control system according to the second embodiment of the present invention. FIG. 3 is different from FIG. 1 in that the elevator control device 1A has a hold door switch detection signal input circuit 2A and a car door switch detection signal input circuit 3A. The hold door switch detection signal input circuit 2A is composed of a first hall side input circuit 21 and a second hall side input circuit 22 branched at the input side common connection point P1, and a car door switch detection signal. The input circuit 3A is composed of a first car side input circuit 31 and a second car side input circuit 32 branched at the input side common connection point P2.

  The elevator operation control circuit 4 </ b> A includes a caution alarm issuing unit 9 in addition to the door switch abnormality determining unit 5 and the abnormality information storage unit 6.

  As described above, the elevator control device is an elevator system of a type in which a machine room is installed. It is designed to be installed at a predetermined location. Of these, when installed in a hoistway, the installation environment is often inferior, such as dust intrusion or condensation. Even in such a poor environment, the life of the product will be shortened, and input circuit components may often be damaged due to contamination such as overvoltage surges. Therefore, even if the hold door switch HSW1, HSW2,…, HSWn and the car door switch KSW Even if is functioning normally, a normal detection signal is not always sent to the elevator operation control circuit.

  Therefore, the elevator operation control circuit 4A of the elevator control device 1A according to the present embodiment has the first hall-side input circuit 21 or the like when the detection signal from the car door position detection means 8 indicates the fully open position. When one of the second hall side input circuits 22 outputs a fully closed detection signal (ON signal), or one of the first car side input circuit 31 or the second car side input circuit 32 outputs a fully closed detection signal. Even when it is output, if the other outputs a fully closed non-detection signal (off signal), it is assumed that no abnormality has occurred in the door switch and the operation is continued.

  However, since it is true that some abnormalities have occurred in the input system due to, for example, dust accumulation or condensation, the caution alarm reporting means 9 issues a caution alarm to the control room, elevator monitoring center, etc. I will inform you. As a result, the manager or maintenance staff promptly rushes to the site to find out the cause of the abnormality in the input system and take appropriate measures.

  Thus, in this embodiment, since the signal input system is configured with two systems, the elevator control device is installed in a poor environment and it is easy to input an abnormal detection signal. However, it is possible to suppress the decrease in service to passengers as much as possible without immediately stopping the operation.

  Next, a configuration in which the door switch short circuit abnormality detection technique described above is applied to a two-way door type elevator will be described. FIG. 4 is a configuration diagram of the two-way door type elevator control system according to the embodiment of the present invention. In this figure, a front-side hold door switch series connection circuit SEC1 and a front-side car door switch FKSW branch from a common connection point P0 formed on the output side of the safety circuit SAC. The front-side hold door switch series connection circuit SEC1 is further connected with the rear-side hold door switch series connection circuit SEC2, and the front-side car door switch FKSW is further connected with the rear-side car door switch BKSW in series. Yes.

  The front-side hold-a-switch series connection circuit SEC1 includes a plurality of front-side hold-a-switches FHSW1, FHSW2,..., FHSWn connected in series. The front-side hold door switches FHSW1, FHSW2, ..., FHSWn are turned on and output a full-closed detection signal when the corresponding front-side holders on each floor are fully closed. The car door switch FKSW is turned on when the front car door is in a fully closed state and outputs a fully closed detection signal.

  Similarly, the back-side hold-a-switch series connection circuit SEC2 includes a plurality of back-side hold-a-switches BHSW1, BHSW2,..., BHSWn connected in series. The rear side hold door switches BHSW1, BHSW2, ..., BHSWn are turned on when the corresponding rear side holders on each floor are in the fully closed state and output a fully closed detection signal. The car door switch BKSW is turned on when the rear car door is in a fully closed state and outputs a fully closed detection signal.

  Note that the resistor Ra connected to the rear-side hold door switch series connection circuit SEC2 and the resistor Rb connected to the rear-side car door switch BKSW are the same as the resistor R in FIG.

  The elevator control device 1B of the present embodiment includes a hold-a switch detection signal input circuit 2B and a car door switch detection signal input circuit 3B. The hold door switch detection signal input circuit 2B includes a front hall side input circuit 23 and a rear hall side input circuit 24, and the car door switch detection signal input circuit 3B includes a front car side input circuit 33 and a rear car side. An input circuit 34 is used.

  The input side of the front hall-side input circuit 23 is connected to a common connection point P01 formed between the front-side hold-a-switch series connection circuit SEC1 and the rear-side hold-a-switch series connection circuit SEC2, and the rear hall-side input circuit The input side of 24 is connected to the back side hold-a-switch series connection circuit SEC2.

  The input side of the front car side input circuit 33 is connected to a common connection point P02 formed between the front car door switch FKSW and the rear car door switch BKSW. It is connected to the side car door switch BKSW.

  Each detection signal inputted by the front hall side input circuit 23 and the rear hall side input circuit 24, and the front car side input circuit 33 and the rear car side input circuit 34 has a door switch abnormality determination means 5 and an abnormality information storage means 6. It is output to the elevator operation control circuit 4B. This elevator operation control circuit 4B controls the front door motor 7F based on the detection signal from the front car door position detection means 8F to open and close the front car door, and the rear door motor 7B detects the rear car door position. The rear car door is opened and closed by controlling based on the detection signal from the means 8B.

  Here, in the elevator control system according to this embodiment, the front-side car door and the rear-side car door do not open simultaneously, and therefore the front-side holder and the back-side holder do not open simultaneously. It is assumed that. Therefore, the door switch abnormality determining means 5 of the present embodiment is configured so that the front side door switch determining operation is performed based on the signal input from the front hall side input circuit 23 and the front car side input circuit 33. On the contrary, when the discrimination operation of the rear side door switch is performed based on the signal input from the rear hall side input circuit 24 and the rear cage side input circuit 34, the front side door switch is not performed. The discriminating operation is not performed.

  In other words, in the configuration of FIG. 4, only the two systems of the front-side hold door switch series connection circuit SEC1 and the front-side car door switch FKSW branch directly from the common connection point P0. However, it is also possible to employ a configuration in which the four systems are directly branched from the common connection point P0 in addition to the rear-side hold-a-switch series connection circuit SEC2 and the rear-side car door switch BKSW. However, such a configuration also causes a current to flow through a system that does not require abnormality determination, resulting in shortening the contact life of the door switch. On the other hand, in the configuration shown in FIG. 4, since the current flows only through the switch necessary for abnormality determination, the contact life of the door switch can be extended accordingly.

  For example, when the elevator operation control circuit 4B drives the front door motor 7F to open the front car door, the front hold door switches FHSW1, FHSW2, ..., FHSWn Since the front car door switch FKSW should be in the off state, the door switch abnormality determining means 5 monitors whether or not an off signal is input from the front hall side input circuit 23 and the front car side input circuit 33. If you do. At this time, the rear-side hold door switches BHSW1, BHSW2,..., BHSWn and the rear-side car door switch BKSW are in the on state, but the front-side switch on the front side is in the off state. Unnecessary current does not flow through the rear switch.

  Therefore, the amount of current can be reduced as compared with the case of using four systems, and the contact life of the back side switch can be extended. With this configuration, the rear-side hold door switches BHSW1, BHSW2,..., BHSWn are connected to the common connection point P0, and the rear-side car door switch BKSW is also connected. As a result, the rear hall side input circuit 24 and the rear car side input circuit 34 input this unnecessary current.

  Considering the case where the elevator operation control circuit 4B drives the rear door motor 7B to open the rear car door, in this case, the front hold door switches FHSW1, FHSW2,..., FHSWn And the front side car door switch FKSW is turned on, and the rear side hold door switches BHSW1, BHSW2,..., BHSWn and the rear side car door switch BKSW should be turned off. It is only necessary to monitor whether or not an off signal is input from the rear hall side input circuit 24 and the rear car side input circuit 34. In this case, an unnecessary current is input to the front hall side input circuit 23 and the front car side input circuit 33 from the common connection points P01 and P02, but this is unavoidable. (However, it is of course possible to prevent an unnecessary current from flowing by providing a cut-off switch or the like before the input circuits 23 and 33.)

  Next, a configuration in which the door switch short circuit abnormality detection technique described above is applied to an emergency elevator will be described. Emergency elevators are usually used as ordinary elevators, but are used for firefighting activities in the event of a fire or other disaster, and are required to be able to move up and down even when the car door is open. The Therefore, the function of stopping operation when an abnormality occurs in the door switch may hinder fire fighting activities. In the present embodiment, the emergency elevator can be used without any problem during fire fighting activities.

  FIG. 5 is a configuration diagram of the emergency elevator control system according to the embodiment of the present invention. In this figure, the elevator control device 1C has a hold-a switch detection signal input circuit 2C, a car door switch detection signal input circuit 3C, and an elevator operation control circuit 4C. The elevator operation control circuit 4C includes a normally open / normally closed contact control means 10 in addition to the door switch abnormality determination means 5 and the abnormality information storage means 6. The normally open / normally closed contact control means 10 receives an operation signal from the operation switch 11 at the time of fire fighting. The fire-fighting operation switch 11 is a call-back switch installed in the vicinity of a hold floor on a predetermined floor (for example, an entrance floor such as the first floor) or an emergency switch installed in the elevator car for returning the elevator car to the predetermined floor. It refers to switches that are operated when the elevator is used for fire fighting activities, such as operation switches.

  Further, a common connection point P03 is provided on the output side of the safety circuit SAC, and common connection points P04 and P05 are provided on the input side of the hold door switch detection signal input circuit 2C and the car door switch detection signal input circuit 3C. . A hold door switch side bypass circuit 12 is formed between the common connection points P03 and P04, and a car door switch side bypass circuit 13 is formed between the common connection points P03 and P05.

  A normally open contact 14 is provided in the middle of the hold door switch side bypass circuit 12, and a normally open contact 15 is provided in the middle of the car door switch side bypass circuit 13. Further, a normally closed contact 16 is provided between the common connection points P03 and P0, a normally closed contact 17 is provided between the hold door switch HSWn and the common connection point P04, and the car door switch KSW and the common connection point P05. Between the two, a normally closed contact 18 is provided. The on / off operation of the normally open contacts 14 and 15 and the normally closed contacts 16, 17 and 18 is controlled by the normally open / normally closed contact control means 10.

  Next, the operation of FIG. 5 will be described. When the emergency elevator according to the present embodiment is used as a normal elevator, the normally open contacts 14 and 15 are off and the normally closed contacts 16, 17 and 18 are on as shown in the figure. Therefore, in this case, the operation is the same as in FIG.

  When a fire occurs in the building and the firefighter operates the firefighting operation switch 11 to start the firefighting activities, the normally open / normally closed contact control means 10 is based on the input of the operation signal from the firefighting operation switch 11. The open contacts 14 and 15 are turned on and the normally closed contacts 16, 17 and 18 are turned off.

  When the normally open contacts 14 and 15 are turned on, the ON signal from the safety circuit SAC is passed through the bypass circuits 12 and 13 to the hold door switch detection signal input circuit 2C and the car door switch detection signal input circuit 3C. It is forcibly input as a fully closed detection signal. Therefore, regardless of whether the hold door switches HSW1, HSW2,..., HSWn and the car door switch KSW are on or off, the elevator operation is not stopped and fire fighting activities are not hindered.

  Further, the normally closed contacts 16 connected to the input side of the hold door switches HSW1, HSW2,..., HSWn and the car door switch KSW and the normally closed contacts 17 and 18 connected to the output side are switched off. Therefore, these hold door switches HSW1, HSW2,..., HSWn and the car door switch KSW are connected to the input side safety circuit SAC, the output side hold door switch detection signal input circuit 2C and the car door switch detection signal input circuit 3C. Are completely separated. Thereby, it is possible to prevent an excessive current from flowing through these switches and other devices even when water is discharged.

The block diagram of the elevator control system which concerns on the 1st Embodiment of this invention. The flowchart for demonstrating the operation | movement of FIG. The block diagram of the elevator control system which concerns on the 2nd Embodiment of this invention. The block diagram of the two-way door type elevator control system which concerns on embodiment of invention. The block diagram of the emergency elevator control system which concerns on embodiment of this invention. The block diagram of the conventional elevator control system.

Explanation of symbols

SAC: Safety circuit
SEC: Hold-a-switch series connection circuit
HSW1, HSW2, ..., HSWn: Hold-a switch
KSW: Car door switch
Ra, Rb: Resistance P0: Common connection point 1: Elevator control device 2: Hold door switch detection signal input circuit 3: Car door switch detection signal input circuit 4: Elevator operation control circuit 5: Door switch abnormality determination means 6: Abnormal information Storage means 7: Door motor 8: Car door position detection means P1, P2: Input side common connection point 1A: Elevator control device 2A: Hold-a-switch detection signal input circuit 21: First hall side input circuit 22: Second hall Side input circuit 3A: Car door switch detection signal input circuit 31: First car side input circuit 32: Second car side input circuit 4A: Elevator operation control circuit 9: Caution alarm issuing means
SEC1: Front side hold-a switch series connection circuit
FHSW1, FHSW2, ..., FHSWn: Front side hold-a switch
FKSW: Front car door switch
SEC2: Rear side hold-a switch series connection circuit
BHSW1, BHSW2, ..., BHSWn: Rear side hold-a switch
BKSW: Rear side car door switch 1B: Elevator control device 2B: Hold door switch detection signal input circuit 23: Hold door switch detection signal input circuit 24: Rear hall side input circuit 3B: Car door switch detection signal input circuit 33: Front car Side input circuit 34: Rear car side input circuit 4B: Elevator operation control circuit 7F: Front door motor 7B: Rear door motor 8F: Front car door position detection means 8B: Rear car door position detection means P03: Input side common connection Points P04, P05: Output side common connection point 1C: Elevator control device 2C: Hold door switch detection signal input circuit 3C: Car door switch detection signal input circuit 4C: Elevator operation control circuit 10: Normally open / normally closed contact control means 11 : Fire-fighting operation switch 12: Hold-a switch side bypass circuit 13: Car door switch side Bypass circuits 14, 15: Normally open contacts 16, 17, 18: Normally closed contacts

Claims (9)

A hold-a-switch series connection circuit formed by connecting in series the hold-a switches on each floor that output a hold-a full-close detection signal when the hold-a is in a fully-closed state;
A car door switch that outputs a car door fully closed detection signal when the car door is in a fully closed state;
A car door position detecting means for detecting a door position in a range from the fully open position of the car door to the fully closed position;
When a car door position detection signal indicating that the car door is in the fully open position is input from the car door position detection means and a hold door full close detection signal is input from the hold door switch series connection circuit, or the car door An elevator control device that determines that an abnormal door switch exists and stops the operation of the elevator when a car door full-closed detection signal is input from the switch;
An elevator control system comprising: The elevator controller is in a state where the hold door full-closed detection signal or the car door full-closed detection signal is input for a predetermined time or more during the input of the car door position detection signal indicating the fully open position. Having a door switch abnormality determining means for determining that an abnormal door switch exists,
The elevator control system according to claim 1. The elevator control device is capable of identifying information on which side of the hold door switch side or the car door switch side is abnormal, and if there is an abnormality on the hold door switch side, the elevator floor is related to the abnormality. Having abnormality information storage means for storing abnormality information including at least information that can be specified;
The elevator control system according to claim 1. The elevator control device includes a hold door full-close detection signal or a non-detection signal input from the hold door switch series connection circuit, and a car door full-close detection signal from the car door switch or A car door switch detection signal input circuit for inputting a non-detection signal;
The elevator control system according to claim 1. The hold door switch detection signal input circuit includes a first hall side input circuit and a second hall side input circuit provided with an input side common connection point in the elevator control device, and
The car door switch detection signal input circuit is constituted by a first car side input circuit and a second car side input circuit provided with an input side common connection point in the elevator control device,
In the elevator control device, when the input signals of the first hall side input circuit and the second hall side input circuit are different from each other, or the first car side input circuit and the second car side input circuit When each input signal is different from each other, the operation is continued using the input signal of the input circuit on the side determined to be normal, and a caution alarm is issued.
The elevator control system according to claim 4. Front-side holder switch series connection circuit formed by connecting front-side holder switches on each floor that output front-side holder full-closed detection signals when the front-side holder is in a fully closed state,
A front-side car door switch that outputs a front-side car door full-closed detection signal when the front-side car door is fully closed;
Front side car door position detecting means for detecting the door position in the range from the fully open position of the front side car door to the fully closed position;
A back side hold door switch series connection circuit formed by connecting back side hold door switches of each floor that output a back side hold door full close detection signal when the back side hold door is in a fully closed state; and
A rear-side car door switch that outputs a rear-side car door full-closed detection signal when the rear-side car door is fully closed;
Back side car door position detecting means for detecting the door position in the range from the fully open position of the back side car door to the fully closed position;
While the front car door position detection signal indicating that the front car door is in the fully open position is being input from the front car door position detecting means, the front side hold door fully-closed circuit is detected from the front side hold door switch series connection circuit. When a signal is input, or when a front-side car door full-closed detection signal is input from the front-side car door switch, it is determined that an abnormal front-side door switch exists and the operation of the elevator is stopped. While the back side car door position detection signal indicating that the back side car door is in the fully open position is being input from the side car door position detection means, the back side hold door fully closed detection signal is output from the back side hold door switch series connection circuit. When there is an input, or when a back side car door full-closed detection signal is input from the back side car door switch, an abnormal back side door switch exists. An elevator control device to stop the operation of the elevator to determine a,
A two-way door type elevator control system. The front-side holder and the front-side car door, and the back-side holder and the back-side car door are those in which both the front side and the back side do not open simultaneously.
The front side hold door switch series connection circuit and the back side hold door switch series connection circuit are connected in series, and the front side car door switch and the back side car door switch are connected in series,
The two-way door type elevator control system according to claim 6. A hold-a-switch series connection circuit formed by connecting in series the hold-a switches on each floor that output a hold-a full-close detection signal when the hold-a is in a fully-closed state;
A car door switch that outputs a car door fully closed detection signal when the car door is in a fully closed state;
A car door position detecting means for detecting a door position in a range from the fully open position of the car door to the fully closed position;
When a car door position detection signal indicating that the car door is in the fully open position is input from the car door position detection means and a hold door full close detection signal is input from the hold door switch series connection circuit, or the car door An elevator control device that determines that an abnormal door switch exists and stops the operation of the elevator when a car door full-closed detection signal is input from the switch;
A fire-fighting operation switch that is manually operated during firefighting activities,
Provided in the hold door switch side bypass circuit and the car door switch side bypass circuit connected in parallel to the hold door switch series connection circuit and the car door switch, respectively. A normally open contact that forcibly inputs a door full-closed detection signal to the elevator control device regardless of the state of the door switch;
The hold door switch series connection circuit and the car door switch are connected to each input side and each output side of the car door switch, and the hold door switch series connection circuit and the car door switch are A normally closed contact to be disconnected from each input side circuit and each output side circuit;
An emergency elevator control system comprising: The firefighting operation switch is a recall switch for returning the elevator car to the predetermined floor installed near the hold floor of the predetermined floor, or an emergency operation switch installed in the elevator car.
The emergency elevator control system according to claim 8.

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