JP2008013301A - Method for specifying hooking position of power cable to projection in hoistway of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for specifying the hooking position of a power cable to a projection in a hoistway of an elevator in which a car is stopped by the control to a long-period vibration caused by an earthquake or wind, any hooking of a power cable is detected, and the hooking position of the power cable to the projection in the hoistway is specified. <P>SOLUTION: There are provided a recognition means 20 of the car stop position, a mass checking means 21 for capturing the change in a suspended mass caused by the hooking of a power cable 5 to a projection in a hoistway, a normal value recording means 22 for recording the normal value in advance, and a determination-specification means. The difference between the measurement value of the mass checking means 21 and the value stored in the normal value recording means 22 is divided by the unit mass to calculate the loss for the power cable length, and the calculated value is added to a distance between a lower end of the power cable at the car stop position and a hoistway pit floor to specify the hooking position of the power cable. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a method for identifying a position where a wire cable used in an elevator is caught on a protrusion in a hoistway, and a position where the protrusion is caught in an elevator wire cable tower.

  The protrusions in the elevator hoistway are provided with measures to prevent the main rope and governor rope from shaking and catching even if long-period vibration due to an earthquake or strong wind occurs in the building. In addition, since the main rope and governor rope itself are under tension, the range of shaking is limited, so the above-mentioned catch prevention measures work effectively so that the main rope and governor rope do not get caught in the protrusions in the hoistway. Even if the car is run, it can be safely run without being caught by a protrusion and being disconnected.

  However, electric cables for power transmission, transmission, and image transmission are connected to the car that moves up and down the hoistway from the control panel. Since the electric cables are suspended by their own weight, long-period vibration due to earthquakes and strong winds is generated. When it occurs in a building, a lightly loaded electric cable has a variety of behaviors, and is prone to catching protrusions in the hoistway, particularly the door side.

  After the seismometer operates and makes an emergency stop at the nearest floor, when the car is restarted with the wire cable caught on the protrusion in the hoistway, the wire cable is cut by the protrusion, and the car is controlled. It becomes impossible, and it will be in a non-stop state for a long time for recovery, causing a great inconvenience to the passengers.

  Therefore, conventionally, a weight sensor that detects the weight of the electric cable is provided under the cage as a method of detecting the catch of the electric cable in the hoistway, and the weight is recorded in advance at each stop floor when the weight detection value is normal. An abnormality detection device for an electric cable that is provided with an abnormality detection means for outputting an abnormality signal when the difference between the weight at the time of normal operation and the weight at the time of emergency stop is deviated. (For example, see Patent Document 1).

In addition, an abnormality detection device has been proposed that supports a wire cable via an elastic body under a cage and provides a detection device that detects a deformation of the elastic body, and indicates that the wire cable has been caught by a protrusion in the tower. Yes. (For example, see Patent Document 2).
Japanese Patent Laid-Open No. 11-79589 (paragraph numbers 0006 to 0007, FIGS. 1 to 4) JP-A-08-198545 (paragraph numbers 0009 to 0010, FIGS. 1 to 3)

  However, the method of detecting the catch of the electric cable by providing a mass sensor or an elastic body under the above-described conventional car is not a technique for identifying the catch position of the electric cable, and the car stop position is on the lower floor side. In this case, the suspended mass is supported by the wire cable fixing support inside the tower, and the mass sensor on the car side has no mass change or elastic deformation sufficient to detect the catch, so it can not be detected, so it is safe at a low speed. Even if the confirmation operation is started, the mutation is detected for the first time in the middle of the confirmation operation, and the emergency stop is again performed. There is a risk of disconnection due to operation while the stop command has been issued, so the catching situation is unknown, so it cannot be operated until the maintenance staff confirms it, and in high-rise buildings with many non-stop floors, after an emergency stop There was a problem of being locked up for a long time.

  The present invention has been made from the actual situation in the above-described prior art, and an object thereof is to provide a method for specifying a position where a wire cable is caught without operating a car.

  In order to achieve the above-mentioned object, the method of detecting that the electric wire cable of the present invention is hooked on the protrusion in the tower is a suspension mass recognition means, a suspended mass by hooking with the protrusion in the hoistway of the electric cable. Cable mass measurement means provided on the car side and the hoistway side to capture the change, both masses by the car stop position based on the output value from the mass means and the stop position distributed in advance from the car stop position recognition means It has a recording means that records the normal value of the measuring means, divides the mass difference between the recorded normal value and the measured value by the unit mass of the cable, calculates the cable cable length loss, and the calculated value The cable cable catching position is specified by adding the cable cable lower end and the hoistway pit floor distance to the car stop position.

  According to the present invention, it is possible to specify the position where the electric cable is caught. Therefore, in the elevator on the higher floor, the maintenance floor can be instructed to the specific floor, efficient work can be performed, the spread time can be shortened, and the waiting time for confinement during rescue Time can be greatly reduced.

  Hereinafter, an embodiment of a catch detection method according to the present invention will be described in detail with reference to FIGS.

  An electric wire cable 5 for transmitting power, signals, etc. between a car 2 that can be raised and lowered in a hoistway 1 and a control panel 11 in a machine room 10 shown in FIG. The other end of the electric cable 5 is hung by the car lower support 4 and is attached to the hoistway side support 8 via the hoistway wall side mass measuring means 7 under the intermediate electric wire connection box 6 fixed in the hoistway 1. It is suspended and connected to the fixed electric wire cable 9 fixed to the wall of the hoistway 1 from the control panel 11 in the intermediate electric wire connection box 6.

  The shortest distance L between the pit 12 floor in the hoistway 1 and the electric cable 5 is the shortest when the car 2 is located on the lowest floor and the longest when the car 2 is located on the highest floor.

  In the control panel 11, a car stop position recognition means 20 for recognizing the car 2 stop position, a car 2 lower mass measurement means 3, a hoistway wall side mass measurement means 7, a mass confirmation means 21 for measuring mass, and an electric cable 5 The normal value recording means 22 that records the output values from both mass measuring means at normal time when the car is not caught at each stop position of the car 2, the detected value of the mass confirmation means 21 and the normal time stored in the recording means 22 Judgment / specification means 23 for judging and specifying the catching position and the catching position based on the amount of mass change from the value.

  FIG. 2 shows the suspended mass measured by the mass measuring means 3 and 7 on the vertical axis, the stop position of the car 2 on the horizontal axis, the trajectory Wt1 is the suspended mass according to the position of the car 2 on the undercarriage mass measuring means 3, and the trajectory Wt2 is the hoistway The suspended mass according to the position of the car 2 of the wall side mass measuring means 7 is shown. The locus Wt3 indicates the sum of Wt1 and Wt2, and the values of Wt1, Wt2, and Wt3 are stored in the normal value recording means 22.

  When the cable 5 is normal and does not get caught in the projection of the hoistway 1 in the tower, the sum Wt3 of the masses Wt1 and Wt2 shows a constant value at any position of the car 2 and the stop position of the car 2 is c1. In this case, the suspended mass value of the undercarriage mass measuring means 3 is Wt11, the suspended mass value of the hoistway wall side mass measuring means 7 is Wt21, and the sum Wt31 of both suspended masses is located on the Wt3 line. Each point at normal time is indicated by ●.

  However, when the cable 5 is caught by a protrusion due to an earthquake and the stop position of the car 2 is c1, the suspended mass value of the undercarriage mass measuring means 3 is Wt111, and the suspended mass value of the hoistway wall side mass measuring hand 7 is suspended. Wt211 is calculated and stored by the mass confirmation means 21. The sum Wt311 of both suspended masses deviates from the Wt3 line, and each point is indicated by □ in the figure.

  If the difference between the Wt 31 and the Wt 311 is compared with the allowable value by the determination / identification means 23, it is determined that the electric cable 5 is caught and an abnormality detection is transmitted to the control unit 11, The reactivation command for the car 2 is suppressed, and the car 2 is operated to avoid disconnecting the electric cable 5.

  Since it is the detection method mentioned above, since it can be confirmed that there is no catch of the electric cable 5 after the car 2 has been urgently stopped due to an earthquake, the passenger can be rescued promptly because it can be disseminated automatically and remotely. be able to.

  Next, a method for detecting a catching part of the electric cable 5 will be described.

  FIG. 3 shows the shortest distance L between the floor of the pit 12 and the electric cable 5 on the vertical axis, and the stop position of the car on the horizontal axis. The locus in the figure indicates the shortest distance Lc at the normal time when the electric cable 5 is not caught by the protrusion.

  When an earthquake occurs, the car 2 traveling in the hoistway 1 is urgently stopped by seismic control, and the position c1 where the car 2 is stopped is confirmed by the car stop position recognition means 20, and the wire cable 5 is caught and suspended. Is reduced, and the mass value Wt111 of the car lower mass measuring means 3 and the mass value Wt211 of the hoistway wall side mass measuring means 7 are converted into the car lower mass measuring means 3 in a normal state without being caught by the car 2 stop position. The difference between the mass value Wt11 and the mass value Wt21 of the hoistway wall side mass measuring means 7 and the detected values at the time of the earthquake, for example, Wt11 recorded in advance by the car lower mass measuring means 3 and the detection at the time of the earthquake By dividing the mass difference of the value Wt111 by the unit mass WtL, it is possible to calculate the length Lc11 of the wire cable 5 corresponding to the mass loss due to the hook under the car.

Lc11 = (Wt11−Wt111) / WtL
Similarly, the mass difference between VI ′ · t21 recorded in the hoistway wall side mass measuring means 7 in advance and the detected value Wt211 at the time of the earthquake is divided by the unit mass WtL, and the mass loss due to the catch on the hoistway wall side is obtained. Electric wire cable 5 length Lc21 can be calculated.

Lc21 = (Wt21−Wt211) / WtL
It can be seen that the wire cable 5 is hooked at the position of Lc2, which is obtained by adding Lc11 and Lc21 to Lc1.

Lc2 = Lc1 + (Lc11 + Lc21)
By calculating the catch position, Lc2, at which the electric cable 5 is caught by the protrusions in the tower, the maintenance staff can promptly guide the catch site without visual inspection of the hoistway, and the rescue time can be shortened. Is possible.

  The hook position of the electric cable 5 may be calculated in the floor within the determination / identification means 23 instead of the distance from the pit 12, and displayed on the floor to notify the maintenance staff.

It is a side view which shows roughly the whole structure concerning one Embodiment of this invention. It is a characteristic view of the car position concerning one Embodiment of this invention, the car lower side, and the suspended electric wire cable mass of the hoistway wall side. It is a characteristic view of the cage position, electric wire cable lower end, and bit floor distance concerning one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hoistway 2 Cage 3 Car bottom mass measurement means 4 Car bottom support tool 5 Electric wire cable 6 Intermediate wire connection box 7 Hoistway wall side mass measurement means 8 Hoistway side support tool 9 Hoistway fixed wire cable 10 Machine room 11 Control panel 12 Pit 20 Car stop position recognition means 21 Mass confirmation means 22 Normal value recording means 23 Judgment / specification means

Claims (1)

  In the method of identifying the position where the electric wire cable to be transmitted, transmitted and sent to the elevator car is caught by the protrusion in the hoistway, the suspension mass change due to the catching means of the car stop position and the electric wire cable caught in the hoistway protrusion The cable mass measurement means provided on the car side and the hoistway side, the output value from the mass means, and the both mass measurement by the car stop position based on the stop position distributed in advance from the car stop position recognition means The recording means for recording the normal value of the means is provided, the mass difference between the recorded normal value and the measured value is divided by the unit mass of the electric cable, and the cable cable length loss is calculated. Elevator electric cable tower collision characterized by specifying the cable cable catching position by adding to the cable cable lower end and hoistway pit floor distance at the car stop position Objects caught location method.

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