JP2013095525A - Wire core inspection device and wire core inspection method for tail cord for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire core inspection device for a tail cord for elevator that does not make an emergency stop even when one wire core of the tail cord is broken, and can detect whether the wire core is broken.SOLUTION: A line Lfor one control signal sent and received between the car 11 of an elevator and a control device 12 is multiplexed by using a plurality of wire cores L, Lthat the tail cord 10 includes. The wire core inspection device is provided with a core inspection device 30 comprising line disconnection means 30a of disconnecting respective multiplexed lines during inspection and wire breaking detection means 30b of detecting whether each line is broken, the line disconnection means 30a disconnects multiplexed lines except for one line as instructed by elevator operation control means 12b, and the wire breaking detection means 30b detect whether the wire cores which are not disconnected are broken. When wire breaking is detected, the detection result is reported to a monitor center 40.

Description

  The present invention relates to a wire core inspection device for an elevator tail cord that detects the presence or absence of breakage of a wire core in a tail cord used for power supply and signal exchange between an elevator control device and a car, and a wire core using the same. It relates to the inspection method.

  2. Description of the Related Art Conventionally, there is known an elevator that performs power feeding and signal transmission / reception between an elevator control device and a car via a tail cord suspended between the car and the intermediate part of the hoistway.

An example of the structure of an elevator tail cord is shown in FIG. As is apparent from this figure, the tail cord 10 of this example has a conductor 10a made by twisting a plurality of strands made of copper covered with an insulator such as vinyl chloride to form a core 10a. The bundle is bundled to form a core 10b, and a plurality (six in the example of FIG. 4) of cores 10b _{1 to} 10b ₆ are covered with a sheath (cover) 10c. The tail cord for an elevator has moderate flexibility.

  FIG. 5 shows an example of the overall configuration of an elevator apparatus using a tail cord. FIG. 5A shows a state where the car 11 is located on the lowermost floor, and FIG. 5B shows a state where the car 11 is located on the uppermost floor.

  As shown in FIGS. 5 (a) and 5 (b), the elevator apparatus has a car 11 installed in the hoistway and an elevator controller 12 and a hoisting machine 13 installed in the machine room above the hoistway. The car 11 is moved up and down via the wire rope 14 by driving the hoisting machine 13 controlled by the elevator control device 12. In addition, for the power supply and signal transmission from the elevator control device 12 to the car 11, a relay box 15 is provided at an intermediate position in the height direction of the hoistway, and the car power supply installed in the relay box 15 and the car 11. The tail cord 10 is connected to the device 16 at both ends. In addition, power supply and signal exchange between the relay box 15 and the elevator control device 12 are performed via a tail cord or a general cable.

  A safety circuit signal, a car door opening / closing signal, power supply for car interior lighting, and the like are assigned to each core 10a of the tail cord 10. As shown in FIGS. 5A and 5B, in the hoistway, there is a top floor emergency stop switch 20a for preventing the car 11 from going over the top floor due to a failure or the like, and the car. 11 is provided with an emergency stop switch 20b on the lowest floor for preventing the vehicle 11 from going too far below the lowest floor, and the car stop for stopping the elevator device at the time of inspection is provided in the car 11. A switch 20c is provided, and each of these switches 20a, 20b, 20c is connected to a safety circuit of the elevator apparatus.

  That is, the safety circuit of the elevator apparatus includes a power source (+) (not shown) provided in the elevator control apparatus 12 → the uppermost emergency switch 20a → the lowermost emergency switch 20b → the one wire core constituting the tail cord 10. 10a → car stop switch 20c → another wire core 10a constituting the tail cord 10 → an elevator state detection relay (not shown) provided in the elevator controller 12 → a power source (−). When any of the switches 20a, 20b, and 20c operates, the elevator state detection relay operates to cut off the power supply to the hoisting machine 13, and the brake device (not shown) is driven to stop the car 11. Let

  By the way, as is clear from FIGS. 5 (a) and 5 (b), the tail cord 10 carrying the safety circuit line repeats bending and extending as the car 11 rises and descends. The heart 10a may get tired and break. This disconnection varies depending on the operation frequency of the car 11 and it is difficult to estimate when it occurs. When the core 10a forming the safety circuit is disconnected, the car is independent of the operation of each switch. 11 will be brought to an emergency stop, which may cause anxiety to passengers in the car 11.

  In order to prevent the occurrence of such inconvenience, conventionally, all the wire cores 10a included in the tail cord 10 are regularly inspected for disconnection. As an inspection method of the wire core 10a, both ends of the tail cord 10 are insertion type connectors, and a resistance measuring device is connected to the insertion type connector to measure the conductor resistance of the wire core 10a in the tail cord 10. Conventionally, such a method has been proposed (see, for example, Patent Document 1). According to this method, since the degree of deterioration of the wire core 10a can be inspected from the change in the conductor resistance, the tail cord 10 can be replaced before the disconnection, and the car 11 due to factors other than the safety circuit. Emergency stop can be suppressed.

JP 62-31681 A

  However, according to the conventional method for checking the core of the tail cord, the conductor resistance of the core 10a can be measured periodically, but the disconnection of the core 10a cannot be prevented. In order to carry out the conventional wire core inspection method, after the car 11 is moved to the vicinity of the set position of the relay box 15 shown in FIG. 5A, the inspector gets on the car 11. A resistance measuring device is connected between the insertion type connector in the relay box 15 at one end side of the tail cord 10 and the insertion type connector in the car power feeding device at the other end of the tail cord 10, and a plurality of wire cores are connected. It is necessary to measure the conductor resistance for each of 10a. For this reason, in the conventional wire core inspection method, it takes a long time to check the wire core 10a including preparation, and during that time, it is necessary to stop the elevator.

  The wire core 10a is composed of about 30 strands of 0.08 mm in diameter, generally made of copper. If all the wires are disconnected, the conductor resistance becomes infinite and can be easily measured. However, the laying length of the tail cord is several tens of meters. In this case, the difference in conductor resistance between when all the strands are healthy and when only one strand is healthy at one local point. Is extremely small. For this reason, not only a high-precision measuring instrument is required, but also advanced techniques are required for the measurement.

  The present invention has been made in view of the above-described actual state of the prior art, and its main purpose is that it does not require a high-precision measuring instrument and advanced measurement technology, and does not require the elevator to be stopped for a long time. Provided is a wire core inspection device and a wire core inspection method for an elevator tail cord that can automatically and periodically inspect the disconnection of a wire core and that is unlikely to cause an automatic emergency stop of the elevator due to the wire core disconnection. There is.

  In order to achieve the above object, the present invention relates to an elevator tail cord wire core inspection device, an elevator car, an elevator control device for driving and controlling the car, and the elevator car and the elevator control device. Applied to an elevator apparatus including a tail cord having a plurality of wire cores constituting a plurality of lines for transmitting control signals transmitted and received between the plurality of wire cores provided in the tail cord. In the elevator tail cord wire core inspection device for checking the presence or absence of disconnection for each, the control signal line has a multiplexed configuration in which two or more tail cord cores are used for one control signal. Line disconnecting means for selectively disconnecting each multiplexed line according to an output signal of the elevator control device at the time of inspection; and In accordance with the output signal from the activator controller, characterized by comprising a disconnection detection means for detecting the presence or absence of breakage for one line which are not disconnection by the line disconnector means.

  On the other hand, the present invention relates to an elevator tail cord wire core inspection device, which is exchanged between an elevator car, an elevator control device that drives and controls the car, and the elevator car and the elevator control device. The present invention is applied to an elevator apparatus including a tail cord having a plurality of wire cores constituting a plurality of lines for transmitting a control signal, and whether or not there is a break in each of the plurality of wire cores provided in the tail cord. In the method for checking the core of the elevator tail cord to be inspected, the control signal line has a multiplexed configuration in which two or more tail cords are used for one control signal. A line disconnecting means for selectively disconnecting each multiplexed line according to the output signal of the apparatus, and the elevator controller In response to the output signal, an elevator tail cord wire core inspection device provided with a disconnection detecting means for detecting the presence or absence of disconnection of one line not disconnected by the line disconnecting means is used. The disconnection of the line and the detection of the presence or absence of the disconnection of the line by the disconnection detection means are repeated for all the wire cores constituting the multiplexed line.

  As described above, when a multiplexing configuration is used in which two or more tail cord cores are used for one control signal, even if one of the cores is disconnected over time, the safety circuit can be operated with another normal core. Thus, normal operation can be continued without emergency stop of the elevator. Moreover, since the line disconnecting means for selectively disconnecting each multiplexed line and the disconnection detecting means for detecting the presence or absence of disconnection for one line not disconnected by the line disconnecting means, the line disconnecting means is used. By repeating the disconnection of the line and the disconnection detection by the disconnection detection means, the disconnected line can be easily identified. Accordingly, the inspection can be performed in a short time, and a highly accurate resistance measuring instrument and advanced measurement technology are not required. In addition, since automatic inspection can be performed without any human elements, disconnection detection can be performed without depending on the work environment.

  Further, the present invention provides the elevator tail cord core inspection apparatus having the above-described configuration, wherein the elevator controller detects the disconnection of the line by the line disconnection means and the presence or absence of the disconnection of the line by the disconnection detection means. It is characterized in that it is performed periodically when the elevator stops or when the elevator is stopped.

  Thereby, an inspection can be performed for passengers who use the elevator without deteriorating the driving service.

  According to the present invention, in the elevator tail cord wire core inspection device having the above-described configuration, the elevator control device issues an abnormal signal to the monitoring center when the wire core breakage is detected by the breakage detection means. It is characterized by that.

  Upon receiving the abnormal signal, the monitoring center can immediately start preparing for the tail cord replacement. On the other hand, the elevator apparatus can continue normal operation using a track that is not disconnected. Therefore, the elevator stop time required for the tail cord replacement is only the actual work time, and can be minimized.

 According to the present invention, the cores of the tail cord are multiplexed, and the presence / absence of disconnection of each multiplexed core is performed by the core inspection device, so that the inspection can be completed in a short time, and a highly accurate resistance measuring instrument. And advanced measurement techniques are also unnecessary. Furthermore, the inspection can be automatically performed without any human factor and does not depend on the work environment. In addition, the inspection of the track is performed periodically and when the elevator is stopped or stopped, so that the passengers who use the elevator can be inspected without deteriorating the driving service. Furthermore, even if one of the wire cores is disconnected due to aging, the elevator can be operated with the normal wire core and the tail cord can be prepared for replacement. The necessary minimum amount of time is sufficient.

Overall configuration diagram of an elevator tail cord wire core inspection device according to an embodiment Table showing the relationship between the operation switching of the line disconnection means and the disconnection detection processing by the disconnection detection means in the wire core inspection device The figure which shows the track inspection flow by the elevator operation control means Diagram showing an example of the structure of an elevator tail cord Overall configuration of elevator device using tail cord

  Hereinafter, an embodiment of an elevator tail cord wire core inspection device and a wire core inspection method according to the present invention will be described with reference to FIGS.

  As shown in FIG. 1, an elevator tail cord wire core inspection device 30 according to the present embodiment includes a power supply Ep → the uppermost emergency switch 20 a → the lowermost emergency switch 20 b provided in the elevator control device 12. → Tail cord 10 → car stop switch 20c → tail cord 10 → state detection relay 12a provided in the elevator control device 12 → provided in the safety circuit of the elevator device formed by the path of the power supply GD. The cores of the tail cord 10 that transmits the safety circuit signal are multiplexed, and the core inspection device 30 checks one by one for the disconnection of the multiplexed cores.

That is, the line L ₁ of the power Ep → top floor emergency stop switch 20a → the lowest floor emergency stop switch 20b of the elevator control device 12 multiplexes the line in the line disconnector means 30a of the cores inspection device 30. In the example shown in the figure, the lines L ₁₁ and L ₁₂ are duplexed. Each of these lines _{L 11, L 12,} switch _{P 11, P 12} such as a photo Dora Njisuta like are connected to disconnecting individually during inspection. A wire core provided in the tail cord 10 is assigned to each of the lines L ₁₁ and L ₁₂ . The track via the tail cord 10 is integrated and connected to the car stop switch 20c of the car 11.

Path L ₂ of the return from the car stop switch 20c is also multiplexed in the same manner as described above. In the example shown in the figure, the lines L ₂₁ and L ₂₂ are duplicated. Each of these lines L ₂₁ and L ₂₂ is assigned another line core provided in the tail cord 10. Then, connect the line disconnector means 30a of the line inspection device 30, the switch _{P 21} respectively to the line _{L 21, L 22,} the switch _{P 22.}

Lines L ₂₁ and L ₂₂ via switches P ₂₁ and P ₂₂ are integrated as line L ₂ and connected to elevator state detection relay 12a and disconnection detection means 30b in line inspection device 30 to form a safety circuit. .

Here, the elevator operation control means 12b provided in the elevator control device 12, when the line inspection, the signal _S 11 for turning on and off the switch _{P 11, P 12, P 21} , P 22 of the line disconnector unit 30a, S ₁₂ , S ₂₁ , S ₂₂ are output, and when the disconnection of the wire core is detected by receiving the signal of the disconnection detection means 30 b, the monitoring center 40 is notified that the disconnection has occurred. Yes.

  As described above, since the wire core inspection device according to the present embodiment multiplexes the wire cores of the tail cord 10, even if one of the wire cores is disconnected due to an aging factor, the elevator continues to the normal wire core. Can continue to operate. That is, even when such a wire core breakage occurs, when the top floor emergency stop switch 20a or the bottom floor emergency stop switch 20b is operated due to an elevator failure or the like, or to prevent the elevator from moving during inspection or the like. When the car stop switch 20c is turned off, the elevator state detection relay 12a is de-energized, the electric power is cut off to the hoisting machine that drives the car 11 by the contact, and the car 11 is mechanically braked. Can be stopped.

  Hereinafter, the relationship between the line disconnecting means 30a and the disconnection detecting means 30b in the line inspection device 30 will be described with reference to FIG.

2, when inspecting the one line L ₁₁ obtained by multiplexing the line L _1, and off only line disconnector unit 30a switch P ₁₂ of which is connected to the line L ₁₂ that constitute a line and multiplexing, other The switches P ₁₁ , P ₂₁ , and P ₂₂ are turned on. This operation of the multiplex line of the line L _1, the line L ₁₂ is disconnection, a state where the line L ₁₁ is connected inspection target. From this, the input of the inspection inputs the target line L ₁₁ is breakage detecting means 30b if disconnected detects that the L (potential 0V) becomes disconnected Yes, when healthy disconnection detecting unit 30b H ( The potential Ep) is detected, and it is detected that there is no disconnection.

Also, the line when inspecting the other line L ₁₂ obtained by multiplexing the L _1, off only the switch P ₁₁ of the line and multiplexed line disconnector unit 30a which is connected to the line L ₁₁ that forms the other switches P ₁₂ , P ₂₁ and P ₂₂ are turned on. This operation of the multiplex line of the line L _1, line L ₁₁ is disconnection, a state where the line L ₁₂ is connected inspection target. Input of the disconnection detection unit 30b if than this inspection target line L ₁₂ is long broken detects that the L (potential 0V) becomes disconnected Yes, when sound is input disconnection detecting means 30b is H (potential Ep) and it is detected that there is no disconnection.

Then, when inspecting the one line L ₂₁ obtained by multiplexing the line L _2, and turned off only the switch P ₂₂ of the line and multiplexed line disconnector unit 30b connected to the line L ₂₂ that forms the other switches P ₁₁ , P ₁₂ and P ₂₁ are turned on. This operation of the multiplex line of the line L _2, the line L ₂₂ is disconnection, a state where the line L ₂₁ is connected inspection target. Input of the disconnection detection unit 30b if than this inspection target line L ₂₁ is long broken detects that the L (potential 0V) becomes disconnected Yes, when sound is input disconnection detecting means 30b is H (potential Ep) and it is detected that there is no disconnection.

Furthermore, the line when inspecting the other line L ₂₂ obtained by multiplexing the L _2, off only the switch P ₂₁ of the line and multiplexed connected to the line L ₂₁ forming the the line disconnector unit 30b, the other switch P ₁₁ , P ₁₂ , and P ₂₂ are turned on. Line L ₂₁ of the multiplexed line of the line L ₂ by this operation and disconnection, a state where the line L ₂₂ is connected inspection target. Input of the disconnection detection unit 30b if than this inspection target line L ₂₂ is long broken detects that the L (potential 0V) becomes disconnected Yes, when sound is input disconnection detecting means 30b is H (potential Ep) and it is detected that there is no disconnection.

  Next, the track inspection flow executed by the elevator operation control means 12b will be described with reference to FIG. The start F10 of this flow is programmed to be performed periodically. Further, this periodic track inspection is performed, for example, when there is no elevator operation call for a certain period of time or at night when the elevator operation is low.

  When this flow starts (process F10), it is first determined in process F11 whether the elevator is stopped. Since this is performed without degrading the operation service of the elevator, if it is in operation, it is stopped and the process proceeds to process F12, and the elevator is not operated during the inspection period in process F12. Thereafter, the process proceeds to processes F13 to F26 in which inspection of each line is sequentially performed.

First, the processing F13~F15 is in the process of inspecting the line _{L 11,} the signal _{S 12} by the switch _{P 12} only off output from the elevator operation control unit 12b in the processing F13 (other switches _{P 11, P 21, P 22} Is on). A process for determining disconnection whether line _{L 11} detected via the signal _{S C} from the disconnection detection means 30b in F14. As a result, when the signal S _C = “L”, it is determined that there is a break, and the fact that the line L ₁₁ is broken is stored in the memory in the process F15. Further, when it is determined that no disconnection from the signal _S C = "H" in the processing F14, or after carrying out the process F15, ends the inspection of the line _{L 11,} the processing F16~F18 to check line _{L 12} Transition.

In process F16, the switch _{P 11} only off (other switches _{P 12, P 21, P 22} is turned on) the signal _{S 11} output from the elevator operation control unit 12b, and the signal from the disconnection detection means 30b in the process F17 It determines the presence or absence of disconnection of the line L ₁₂ detected via the S _C. As a result, when the signal S _C = “L”, it is determined that there is a disconnection, and the fact that the line L ₁₂ is disconnected is stored in the memory in process F18.

Accordingly, as shown in FIG. 1, even if the cores are broken in part A of the tail cord 10 connected to the line L _12, it can be detected by this process.

In process F17, when it is determined that no disconnection from being a signal _S C = "H", or after carrying out the process F18, ends the inspection of the line _{L 12,} inspect the line _{L 21} shown in FIG. 2 The process proceeds to processing F19 to F21.

Similarly, the process F19, only the switch _{P 22} is turned off (the other switches _{P 11, P} 12, _{P 21} is turned on) the signal _{S 22} output from the elevator operation control unit 12b, the disconnection detection unit 30b in the processing F20 It determines the presence or absence of disconnection of the line L ₂₁ detected via the signal S _C from. As a result, when the signal S _C = “L”, it is determined that there is a disconnection, and the processing 21 stores that the line L ₂₁ is disconnected in the memory. Further, if the treated F20 determines that the signal _S C = "H" next to no disconnection, or after carrying out the process F21, ends the inspection of the line _{L 21,} to inspect the line _{L 22} shown in FIG. 2 process The process proceeds to F22 to F24.

In process F22, the switch _{P 21} only off by a signal _{S 21} output from the elevator operation control means 12b (the other switch _{P 11, P} 12, _{P 22} is turned on), and the signal from the disconnection detection means 30b in the process F23 It determines the presence or absence of disconnection of the line L ₂₂ detected via the S _C. As a result, when the signal S _C = “L”, it is determined that there is a disconnection, and the fact that the line L ₂₂ is disconnected is stored in the memory in process F24. When it is determined that the signal _S C = "H" next to no disconnection in the process F 23, or after carrying out the process F 24, and ends the inspection of the line _{L 21,} the process proceeds to F25.

  In this way, by multiplexing the tail cord cores and automatically checking for the presence or absence of disconnection of the cores, the inspection can be done in a short time, and a highly accurate resistance measuring instrument and advanced measurement technology Is also unnecessary. Furthermore, the inspection can be automatically performed without any human factor and does not depend on the work environment.

Next, in a process F25, if there is a process F15, F18, F21, line _L 11 in F _24, L _12, L _21, lines were also detect disconnection in any line of the _{L 22} is from the elevator operation control means 12b, It reports that a disconnection has occurred in a monitoring center 40 such as a monitoring department in the building or an elevator maintenance company. Thereby, the elevator management department of the monitoring center 40 can prepare for the replacement of the tail cord 10. On the other hand, since the elevator apparatus can continue to move using a normal wire core, the stop time of the elevator apparatus required for replacing the tail cord 10 can be only the actual work time for replacing the tail cord 10. The stop time of the elevator device can be minimized.

  When the above process is completed, in process F26, the operation stop of the elevator in the track inspection is canceled and the process ends (process F27).

In the above-described embodiment, the case where the safety circuit of the elevator apparatus is multiplexed has been described as an example. However, other signals and power supply exchanged between the car 11 and the elevator control apparatus 12 are also multiplexed. be able to. In the above embodiment, the core of the tail cord 10 is doubled with respect to one signal. However, the number of the cords may be three or more in order to further increase safety against disconnection. In this case, the number of switches corresponding to the number of multiplexed wires is provided in the line disconnecting means 30a, and the disconnection of each line by the line disconnecting means 30a and the presence / absence of disconnection of each line by the disconnection detecting means 30b are detected. Repeat for all the cores that make up the multiplexed line. Furthermore, in the above-described embodiment, the cores multiplexed in the tail code 10 are arranged in the same bundle (10b ₁ , 10b ₆ ). However, the bundle may be dispersed in order to eliminate some risk.

  INDUSTRIAL APPLICABILITY The present invention can be used for inspection of disconnection of a tail cord provided in an elevator apparatus.

10 tail code 10a core wires 10b ₁ ~10b ₆ more lines sincerely consisting bundle 10c sheath 11 cab 12 elevator controller 12a elevator status detecting relay 12b elevator operation control means 13 hoist 14 wire rope 15 relay box 16 cab feeding device 20a top floor emergency stop switch 20b lowest floor emergency stop switch 20c cab in stop switch 30 wire heart inspection apparatus 30a line disconnector unit 30b breakage detecting means 40 monitoring center L _{1, L 2} line L _11, multiple _{L 12} lines L1 Lines L ₂₁ , L ₂₂ Lines L 2 Multiplexed lines P ₁₁ , P ₁₂ , P ₂₁ , P ₂₂ Line disconnect switch

Claims (4)

A plurality of wire cores constituting a plurality of lines for transmitting a control signal transmitted and received between the elevator car, the elevator control device that drives and controls the car, and the car and the elevator control device In a wire core inspection device for an elevator tail cord, which is applied to an elevator device including a tail cord having the following, and inspects whether or not each of the plurality of wire cores provided in the tail cord is disconnected.
The control signal line is a multiplexed configuration in which two or more tail cord cores are used for one control signal, and each multiplexed line is set according to the output signal of the elevator control device at the time of line inspection. Line disconnecting means for selectively disconnecting and disconnection detecting means for detecting the presence or absence of disconnection of one line not disconnected by the line disconnecting means in response to an output signal from the elevator control device. Elevator tail cord wire core inspection device.   The elevator control device periodically performs the detection of the disconnection of the line by the line disconnection means and the presence or absence of the disconnection of the line by the disconnection detection means when the elevator is stopped or the elevator is stopped. The wire tail inspection device for an elevator tail cord according to claim 1.   2. The elevator tail cord wire core inspection according to claim 1, wherein the elevator control device issues an abnormal signal to a monitoring center when the wire core breakage is detected by the wire breakage detection means. apparatus. A plurality of wire cores constituting a plurality of lines for transmitting a control signal transmitted and received between the elevator car, the elevator control device that drives and controls the car, and the car and the elevator control device In a method for checking the center of an elevator tail cord, which is applied to an elevator apparatus including a tail cord having a cable, and inspects whether or not each of the plurality of wire cores provided in the tail cord is disconnected.
Each control signal line has a multiplexing configuration in which two or more tail cord wires are used for one control signal, and each line multiplexed according to the output signal of the elevator control device at the time of line inspection Elevator comprising line disconnecting means for selectively disconnecting and disconnection detecting means for detecting the presence or absence of disconnection of one line not disconnected by the line disconnecting means in response to an output signal from the elevator control device Using the tail cord wire core inspection device for
The elevator tail code characterized by repeating the disconnection of the line by the line disconnection means and the detection of the presence or absence of disconnection of the line by the disconnection detection means for all the cores constituting the multiplexed line. Wire core inspection method.