JP2008037564A - Moving cable catch detection device of elevator and elevator system using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To automatically discriminate whether a moving cable is in the state of being caught by an obstacle in a hoistway or not without relying on manual operation. <P>SOLUTION: Displacement sensors 8A, 8B detect minute displaced amounts δA, δσB of movable plates 6A, 6B fluctuating according to the position of a car 1. A cable state discriminating means 13 discriminates whether or not the moving cable 5 is in the state of being caught by the obstacle in the hoistway by determining whether or not these displaced amounts δA, δB come within the ranges of upper and lower limit values LA1, LA1 and upper and lower limit values LB1, LB2 set according to the position P of the car. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an elevator moving cable catch detection device and an elevator system using this device.

  Between the hoistway wall and the car bottom, there is a moving cable (sometimes called a tail cord or a power cable) formed by bundling a large number of communication cables, power cables, and the like. . This moving cable has a certain degree of flexibility, and a hanging part bent in a U shape is formed in the middle part. The part of the moving cable in which the hanging part is formed moves in the hoistway with the movement of the car.

  In this manner, the intermediate portion of the moving cable is not fixed in the hoistway because the hanging portion forming portion sequentially changes with the movement of the car, and the hoistway wall and the car bottom are on both sides. It is simply suspended below as a support point. However, this moving cable has a large weight per unit length, and because it has a considerable weight as a whole, a stable posture is maintained even if it is simply suspended downward, If it is a normal state, it does not shake greatly in the horizontal direction.

However, when the building is shaken greatly due to the occurrence of an earthquake, the suspended moving cable may shake greatly and collide with or be caught by obstacles such as various devices and members installed in the hoistway. is there. For this reason, conventionally, in order to suppress such lateral vibration of the moving cable, a configuration in which a viscoelastic member is attached to the moving cable or a damping member is disposed on the hoistway wall has been proposed (for example, Patent Documents). 1).
JP-A-6-234482

  However, even if there is a member for suppressing the lateral movement of the moving cable as described above, if there is a large earthquake with the building shaking exceeding a certain level, the lateral movement of the moving cable will be sufficient. As a result, collisions or catches on obstacles in the hoistway often occurred.

  In an ordinary elevator system, a car is immediately stopped when an earthquake occurs, and passengers in the car are lowered to the nearest floor by a subsequent seismic control operation to prevent a confinement accident. However, if a seismic control operation is performed while the moving cable is caught by an obstacle, the moving cable will be cut or the obstacle will be damaged before the car arrives at the nearest floor. There is a risk of being trapped in the car.

  In addition, when normal operation is resumed after the end of seismic control operation, normal operation is resumed by automatic restoration, and normal operation is resumed by manual restoration. Even if the moving cable is caught by an obstacle, depending on where it is caught, the moving cable may not be cut and the car may arrive at the nearest floor and the earthquake control operation may be terminated. In such a case, the normal operation is resumed in such a state, so that the moving cable is cut or the obstacle side device is damaged immediately after the normal operation is resumed. Therefore, under normal circumstances, normal operation is resumed automatically only for earthquakes below a certain level where there is little possibility of moving cables being caught, and for those earthquakes exceeding a certain level, elevator maintenance workers After confirming safety, normal operation is resumed by manual recovery.

  However, for example, assuming the occurrence of a major earthquake equivalent to the Great Hanshin Earthquake class, a limited number of elevator maintenance workers are dispatched quickly to a number of building elevator systems scattered throughout the country. It is difficult as a real problem. Therefore, it is desirable to raise the seismic level that can be handled by automatic restoration as much as possible, but for that purpose, it is automatically determined whether the moving cable is caught by an obstacle in the hoistway without depending on the human hand. Technology is essential. In the past, it was thought that such discrimination could only be done by an elevator maintenance worker, so normal operation can still be resumed by automatic recovery only for earthquakes below a certain low level. There wasn't.

  The present invention has been made in view of the above circumstances, and the movement of an elevator that can automatically determine whether or not the moving cable is caught by an obstacle in the hoistway without depending on the hand. It is an object of the present invention to provide a cable catch detection device and an elevator system capable of raising an earthquake level that allows normal operation to be resumed by automatic recovery.

  As means for solving the above-mentioned problem, the invention according to claim 1 is fixed to at least one of the car-side terminal part and the hoistway wall side terminal part of the moving cable, and the position of the car in the hoistway is determined. A movable member capable of minute displacement in the vertical direction by expansion and contraction of the moving cable based on a change in the weight of the moving cable according to the movement, a displacement amount detecting means for detecting a displacement amount of the movable member, and the displacement amount detecting means A cable state for determining whether or not the moving cable is caught by an obstacle in the hoistway based on a comparison between the detected displacement amount and the upper and lower limit values set in advance according to the car position And a discriminating means.

  According to a second aspect of the present invention, in the first aspect of the present invention, the movable member is supported by a car-side fixing member or a hoistway-side fixing member via an elastic member that expands and contracts according to the weight of the moving cable. It is a plate.

  A third aspect of the invention is characterized in that, in the first or second aspect of the invention, a non-contact type displacement sensor is used as the displacement amount detecting means.

  According to a fourth aspect of the present invention, in the first or second aspect of the present invention, a contact-type displacement sensor is used as the displacement amount detecting means.

  The invention according to claim 5 is attached over the entire length between the car-side terminal portion and the hoistway wall-side terminal portion of the moving cable, and causes an electric resistance line to be cut when the moving cable is caught. A resistance change detecting means for supplying a minute current and detecting a resistance change when the electrical resistance wire is cut, and an obstacle in the hoistway based on a detection signal from the resistance change detecting means Cable state determining means for determining whether or not the cable is caught in the cable.

  A sixth aspect of the invention is characterized in that, in the fifth aspect of the invention, the electric resistance wire is spirally wound around and attached to the moving cable.

  According to a seventh aspect of the present invention, there is provided an optical fiber wire that is attached over the entire length between the car-side terminal portion and the hoistway wall-side terminal portion of the moving cable, and that is cut or deformed when the moving cable is caught. A light quantity change detecting means for supplying a light signal and detecting a light quantity change when the optical fiber line is cut or deformed, and based on a detection signal from the light quantity change detecting means, the moving cable is an obstacle in the hoistway. And cable state determining means for determining whether or not the object is caught by an object.

  The invention according to claim 8 is characterized in that, in the invention according to claim 7, the optical fiber is spirally wound around and attached to the moving cable.

  According to a ninth aspect of the present invention, in the elevator moving cable catch detection device according to any one of the first to eighth aspects, and when the normal operation is to be resumed after the end of the seismic control operation, the car is moved at a predetermined speed at a low speed And an operation control means for resuming normal operation of the elevator on the condition that the moving cable catching detection device of the elevator does not detect the catching state of the moving cable even if the elevator travels as described above.

  According to the present invention, since it is configured to use a peculiar phenomenon when the moving cable is caught, it is possible to detect whether the moving cable is caught or not without manually moving the elevator. A cable hook detection device can be provided. And by using such a moving cable catch detection apparatus, the elevator system which can raise the earthquake level which can restart a normal driving | operation by automatic recovery | restoration conventionally can be provided.

  FIG. 1 is a configuration diagram of a first embodiment of the present invention. The car 1 has a car room 2 and a car frame 3. A moving cable 5 having a U-shaped hanging portion 5a formed in the middle is suspended between the car 1 and the wall portion 4.

  A movable plate 6 </ b> A (movable member) disposed between the car room 2 and the car frame 3 is fixed to the car-side terminal portion of the moving cable 5. The movable plate 6A is attached to the bottom of the car frame 3 via an elastic member 7 (for example, a rubber member) so that it can be displaced in the vertical direction. A non-contact displacement sensor 8A (displacement amount detecting means) such as a laser displacement meter is disposed below the movable plate 6A. The displacement sensor 8A detects a minute displacement amount δA in the vertical direction of the movable plate 6A (that is, the amount of expansion / contraction at the car-side end portion of the moving cable 5), and the detection signal is transmitted to the communication within the moving cable 5. Output on the cable.

  On the other hand, the hoistway wall side terminal portion of the moving cable 5 is located at a substantially central position between the uppermost floor and the lowermost floor of the wall portion 4. That is, a fixed plate 9 is fixed to the wall portion 4 and is attached to the fixed plate 9 via an elastic member 7 so that the movable plate 6B can be displaced in the vertical direction. The movable plate 6B is fixed to the hoistway wall side terminal portion of the moving cable 5.

  Further, a non-contact displacement sensor 8B (displacement amount detection means) similar to the displacement sensor 8A is supported on the front end surface of the fixed plate 9 via a support member 10. The displacement sensor 8B is disposed so as to be positioned below the movable plate 6B, and a minute displacement amount δB in the vertical direction of the movable plate 6B (that is, the amount of expansion and contraction at the end portion of the hoistway wall side of the movable cable 5). And the detection signal is output on the communication cable in the moving cable 5.

  The elevator controller 11 controls the raising / lowering movement of the car 1 in the hoistway. The elevator control device 11 includes a car position calculation unit 12, a cable state determination unit 13, and an operation control unit 14. The elevator control device 11 is provided in a machine room in an elevator system of a type in which a machine room is installed, and in a type of elevator system in which no machine room is installed, a landing on a specific floor or a specific location in a hoistway or the like Is provided.

  The car position calculation means 12 inputs a car speed v from a car speed detector attached to a hoisting machine (not shown), and calculates the car position P obtained by integrating the car speed v. This is output to the cable state determination means 13.

  The cable state determination means 13 is such that the displacement amounts δA and δB detected by the displacement sensors 8A and 8B are within the upper and lower limit values LA1 and LA2 and the upper and lower limit values LB1 and LB2 respectively set according to the car position P. Whether or not the moving cable 5 is caught by an obstacle in the hoistway is determined depending on whether or not it is in the cable.

  The operation control means 14 controls the lifting and lowering movement of the car 1 by controlling the rotation of a hoisting machine (not shown). When the cable state judging means 13 judges that the car is in a hooked state, the car immediately The movement of 1 is stopped.

  In most cases, the part of the moving cable 5 that is caught by an obstacle in the hoistway is an inner part of the U-shaped hanging part 5a. However, the moving cable 5 is rarely hooked by a part other than the hanging part 5a. Sometimes it happens.

  Next, the operation of FIG. 1 will be described with reference to FIGS. FIG. 2 is an explanatory diagram showing changes in the displacements δA and δB according to the position of the car 1 in FIG. 1, where (a) shows the car position at the lowest floor, and (b) shows the car position. Shown is on the top floor.

  As shown in FIG. 2 (a), in the state where the car 1 is located on the lowest floor, the distance between the hanging part 5a and the car side terminal part of the moving cable 5 is short, and the hanging part 5a and the elevator The distance to the road wall side terminal is long. That is, the own weight (and hence the amount of extension) applied to the car-side terminal portion of the moving cable 5 is small, while the own weight (and therefore the amount of extension) applied to the hoistway wall side terminal portion of the moving cable 5 is large. It will be a thing. Therefore, the displacement amount δA of the movable plate 6A fixed to the car-side end portion is small, whereas the displacement amount δB of the movable plate 6B fixed to the hoistway wall-side end portion is large.

  Further, as shown in FIG. 2B, in the state where the car 1 is located on the top floor, the distance between the hanging portion 5a and the car-side terminal portion of the moving cable 5 is long, and the hanging portion 5a The distance between the hoistway wall side terminal portion is short. That is, the own weight (and hence the amount of extension) applied to the car-side terminal portion of the moving cable 5 is large, while the own weight (and therefore the amount of extension) applied to the hoistway wall side terminal portion of the moving cable 5 is small. It will be a thing. Therefore, the displacement amount δA of the movable plate 6A fixed to the car-side end portion is large, whereas the displacement amount δB of the movable plate 6B fixed to the hoistway wall-side end portion is small.

  From the above, in the “normal time” when the moving cable 5 is not caught, the change characteristic of the displacement amount δA when the car position P of the car 1 moves between the lowermost floor and the uppermost floor is , A curve rising upward as shown by the solid line in FIG. As long as the value of the displacement amount δA is within the normal range between the upper limit value LA1 and the lower limit value LA2, the cable state determination means 13 determines that there is no catch, and on the other hand, even within the normal range. When deviating from the above, a determination signal indicating that a catch has occurred is output to the operation control means 14. Although FIG. 3A shows a change characteristic of the displacement amount δA, the curve has an upward slope. However, the change characteristic of the displacement amount δB has a reverse characteristic of the displacement amount δA and has a downward slope curve. The change characteristic diagram of the displacement ΔB is not shown.

  On the other hand, the characteristic of the displacement amount δA is as shown by a solid line in FIG. 3B when the moving cable 5 is caught “when the cable is caught”. In other words, it is assumed that the hanging portion 5a of the moving cable 5 is caught by an obstacle in the hoistway at a point where the car 1 is raised by a certain distance from the lowest floor. Then, since the displacement amount δA1 at the position P1 slightly past this point increases abnormally and reaches the upper limit value LA1, the cable state determination means 13 determines that the moving cable 5 is in a hooked state, and A determination signal is output to the operation control means 14. In response to this determination signal, the operation control means 14 immediately stops the rotation of the hoisting machine and stops the raising of the car 1. Therefore, the moving cable 5 can be avoided from being cut.

  In this case, if the conventional elevator system does not have the moving cable catch detection function as in the present invention, the car 1 continues to rise after passing the position P1, and reaches the position P2, as indicated by a broken line. The moving cable 5 is cut when the limit displacement amount δA2 is reached.

  In this embodiment, after the car 1 stops at the position P1, the elevator maintenance worker waits for arrival at the site, and the elevator maintenance worker releases the hook of the moving cable 5 and confirms safety again. The car 1 will rise.

  Thus, in the first embodiment, focusing on the fact that a certain correspondence is maintained between the car position and the moving cable weight on the car side or hoistway wall side, Since it is configured to determine whether this correspondence is maintained by detecting the amount δA or the displacement amount δB of the terminal portion on the side of the hoistway wall, whether or not the moving cable 5 is caught without depending on human hands. Can be determined.

  In addition to the configuration shown in FIG. 1, the first embodiment can include various modifications as follows, for example.

(1) In the configuration of FIG. 1, a non-contact type displacement sensor such as a laser displacement meter is used as the displacement amount detection means. However, the present invention is not limited to this, and various types of displacement sensors may be used. Is possible. For example, as shown in FIG. 4, a contact-type displacement sensor 8A1 including a contact 81A1 that contacts the lower surface of the movable plate 6 may be used.

(2) In the configuration of FIG. 1, the displacement amounts δA and δB of both the car-side terminal portion and the hoistway wall-side terminal portion of the moving cable 5 can be detected. It is possible to detect a catch as a configuration to detect.

(3) In the configuration of FIG. 1, it is assumed that a rubber member is used as the elastic member 7. However, as long as it can faithfully reflect the cable expansion / contraction amount in the car side terminal part or the hoistway wall side terminal part. It is not particularly limited. For example, a spring member may be used instead of the rubber member.

(4) In the configuration of FIG. 1, the movable plates 6A and 6B are used as movable members that are slightly displaced in accordance with the amount of expansion and contraction of the moving cable 5. However, the movable members do not have to be plate-shaped, such as block shapes. Other shapes may be used. Alternatively, only the peripheral part of the fixed position of the moving cable 5 may be formed in a plate shape, and the part positioned above the displacement sensors 8A and 8B may be formed in a stick shape or the like.

  FIG. 5 is a configuration diagram of the second embodiment of the present invention. As described above, in the first embodiment, when the expansion / contraction amount of the moving cable 5 corresponding to the car position is about to deviate from the normal range, it is determined that the hooked state is detected. In the form, when the electric resistance wire attached to the moving cable 5 is cut, it is determined that a hooked state has occurred, and the configuration is simpler.

  That is, an electric resistance wire 15 is attached over the entire length between the car-side terminal portion and the hoistway wall-side terminal portion of the moving cable 5, and both ends of the electric resistance wire 15 are connected to a DC power source that constitutes the resistance change detecting device 16. 17 and an ohmmeter 18. The DC power supply 17 constantly supplies a very small current to the electric resistance wire 15, and the ohmmeter 18 sends an abnormality detection signal to the cable state determination means 13 when the resistance greatly increases due to the cutting of the electric resistance wire 15. It is designed to output.

  When the abnormality detection signal is input, the cable state determination unit 13 determines that the cable is caught by an obstacle in the hoistway of the moving cable 5. Thereafter, as in the first embodiment, the operation control means 14 stops the movement of the car 1.

  The electric resistance wire 15 is not cut by the normal movement of the hanging portion 5a accompanying the movement of the car 1, but is easily cut when the hanging portion 5a or other part is caught by an obstacle. It is what you have. For example, a very thin resistance wire that is easily broken even by a slight deformation may be arranged along the moving cable 5 and fixed using an appropriate member, or a very thin thin film resistance wire may be used. An adhesive tape formed on the adhesive surface may be attached along the moving cable 5.

  The first embodiment shown in FIG. 1 has a structure capable of measuring the amount of expansion / contraction at the car-side end portion or hoistway wall-side end portion of the moving cable 5 (the diameter of the moving cable 5 on the bottom of the car frame 3 or the fixed plate 9). In this second embodiment, the electric resistance wire 15 is attached along the moving cable 5 and the resistance change is made to the electric resistance wire 15 in this second embodiment. It is only necessary to connect the detection device 16. Therefore, the configuration of the second embodiment can be easily applied to an existing elevator system.

  FIG. 6 is a configuration diagram of the third embodiment of the present invention. 6 is different from FIG. 5 in that the electric resistance wire 15 is wound around the moving cable 5 in a spiral shape. FIG. 7 is a cross-sectional view of the moving cable 5 and the electric resistance wire 15 for explaining this difference.

  As shown in FIG. 7 (a), in the configuration of FIG. 5, the electric resistance wires 15 are attached almost straight on both flat surfaces 5b and 5c of the moving cable 5 having a flat cross-sectional shape. The mounting position of the electric resistance wire 15 on the flat surface is fixed to a certain specific position over a long section. Even if the electric resistance wire 15 is attached in such a state, if the hook is generated in any part of the moving cable 5, in most cases, the electric resistance wire 15 in the vicinity of the hook is cut off. The detection of the occurrence of catching of the moving cable 5 is rarely a problem in practice.

  However, for example, when a catch is generated on the flat surface 5b away from the electric resistance wire 15 (x mark), the electric resistance wire 15 on the flat surface 5b or the electric resistance wire on the flat surface 5c on the back side. There remains a slight possibility (which is considered to be on the order of a few percent) that none of 15 is cut. In such a case, the cable state discriminating means 13 cannot discriminate that the moving cable 5 is caught, so that the moving cable 5 is moved as it is, so that the moving cable 5 is damaged or cut. There is a risk of it.

  On the other hand, in the configuration of FIG. 6, as shown in FIG. 7B, since the electric resistance wire 15 is uniformly wound around the outer peripheral surface of the moving cable 5, it is caught at any part of the moving cable 5. Even if this occurs, the portion of the electric resistance wire 15 that always exists in the vicinity thereof is disconnected, so that the detection of the occurrence of the catch is not missed. Therefore, according to the configuration of FIG. 6, the electric resistance wire 15 needs a long distance, but high reliability can be obtained accordingly.

  FIG. 8 is a configuration diagram of the fourth embodiment of the present invention. 8 differs from FIG. 5 in that an optical fiber line 19 and a light amount change detection device 20 are used instead of the electric resistance line 15 and the resistance change detection device 16 in FIG.

  The light quantity change detection device 20 always supplies an optical signal to one end side of the optical fiber line 19 and receives this optical signal from the other end side, but if the moving cable 5 is caught, its vicinity Since the optical fiber line 19 is cut or deformed, the amount of received light changes greatly. The light amount change detection device 20 outputs an abnormality detection signal to the cable state determination means 13 based on the change in the amount of received light. Similarly to the second embodiment, the configuration of the fourth embodiment can be easily applied to an existing elevator system.

  FIG. 9 is a configuration diagram of the fifth embodiment of the present invention. 9 differs from FIG. 8 in that the optical fiber wire 19 is wound around the moving cable 5 in a spiral shape. According to the configuration shown in FIG. 9, the optical fiber line 19 needs a long distance for the same reason as described above with reference to FIG. 7, but high reliability can be obtained accordingly.

  In the configurations shown in FIGS. 5, 6, 8, and 9, the resistance change detection device 16 and the light amount change detection device 20 are described as being external devices of the elevator control device 11. The resistance change detection device 16 and the light amount change detection device 20 may be provided inside the elevator control device 11.

  Next, an elevator system using the elevator moving cable catch detection device according to the first to fifth embodiments as described above will be described. In the following example, the case where the detection device of FIG. 1 is used will be described as an example. However, the case of using the detection device of FIGS. 5, 6, 8, and 9 can be considered in the same manner.

  In this elevator system, an earthquake detection signal from an earthquake detector not shown in FIG. 1 is input to the operation control means 14. This seismic detector outputs an earthquake detection signal when acceleration of a certain level or higher is detected (that is, when a building shake exceeds a certain level), and the earthquake detection level is set to a low level. The first seismic detector (usually installed on the bottom floor of the building) and the second seismic detector with the seismic detection level set to a high level (usually installed on the top floor of the building) Are). If only the first seismic sensor detects an earthquake, normal operation can be resumed by automatic restoration. However, if the second seismic sensor senses an earthquake, normal operation is not resumed. Resume is not allowed. However, since this elevator system is equipped with the moving cable catch detection device shown in FIG. 1, the seismic detection level of the second seismic detector is set higher than the level in the conventional system and can be automatically restored. Range has been expanded.

  FIG. 10 is a flowchart of the operation of such an elevator system. For example, when an earthquake detection signal is input only from the first earthquake detector, the operation control unit 14 immediately stops the operation of the elevator (step 1). Then, in order to allow passengers in the car compartment 2 of the car 1 to escape to the nearest floor, execution of the control operation is started (step 2). During the movement of the car 1 by this control operation, the cable state determination means 13 uses the upper and lower limit values LA1, LA2 in which the displacement amounts δA, δB from the displacement sensors 8A, 8B are set according to the car position P, respectively. It is determined whether or not the moving cable 5 is caught by an obstacle in the hoistway depending on whether or not it is within the upper and lower limit values LB1 and LB2 (step 3).

  If the cable state determination means 13 determines that the moving cable 5 is caught before the car 1 arrives at the nearest floor, the operation control means 14 immediately stops operation, and the maintenance worker Wait for arrival at the site (step 4).

  On the other hand, if the car 1 arrives at the nearest floor and the control operation is finished without determining that the cable state determination unit 13 is caught in the moving cable 5 (steps 3 and 5), the operation control unit 14 determines whether or not the level of the earthquake that has occurred is a level that can be automatically restored (step 6). Here, as described above, since only the first earthquake detector outputs the earthquake detection signal, the operation control means 14 determines that the level can be automatically restored. In this case, if it is determined that automatic recovery is impossible (that is, manual recovery level), the operation control means 14 remains in the operation stop state and the maintenance worker arrives at the site. Wait (step 4).

  When the operation control means 14 determines in step 6 that the earthquake level is an automatically recoverable level, the operation control means 14 starts executing the low-speed inspection operation (step 7). During the movement of the car 1 by the low-speed inspection operation, the cable state determination means 13 uses the upper and lower limit values LA1, LA2 in which the displacement amounts δA, δB from the displacement sensors 8A, 8B are set according to the car position P, respectively. Whether or not the moving cable 5 is caught by an obstacle in the hoistway is determined based on whether or not it is within the range of the upper and lower limit values LB1 and LB2 (step 8). If it is determined that a catch has occurred, the operation control means 14 immediately stops the operation and waits for the maintenance worker to arrive at the site (step 4).

  On the other hand, the cable state determination means 13 does not determine that the moving cable 5 is caught, and travels over a predetermined distance (usually reciprocal travel between the uppermost floor and the lowermost floor. The operation control means 14 ends the low-speed inspection operation (steps 8, 9, and 10). The operation control means 14 then resumes normal operation (step 11).

  As described above, in this elevator system, it is possible to determine whether or not the moving cable 5 is caught by the execution of the low-speed inspection operation after the completion of the control operation. Therefore, the normal operation is resumed by automatic recovery. It is possible to raise the possible earthquake level than before.

The block diagram of the 1st Embodiment of this invention. It is explanatory drawing which shows the change of displacement amount (delta) A, (delta) B according to the position of the cage | basket | car 1 in FIG. 1, (a) is a car position in the lowest floor, (b) is a car position in the top floor. Show the case. FIGS. 2A and 2B are explanatory diagrams illustrating an example of change characteristics of the displacement amount δA in FIG. 1, in which FIG. FIG. 2 is a partially enlarged view showing a configuration of a contact type displacement sensor 8A1 that can be used instead of the non-contact type displacement sensor 8A in FIG. The block diagram of the 2nd Embodiment of this invention. The block diagram of the 3rd Embodiment of this invention. FIG. 7 is an explanatory diagram of the difference between FIG. 5 and FIG. 6, (a) is a partial cross-sectional view of FIG. 5, and (b) is a partial cross-sectional view of FIG. 6. The block diagram of the 4th Embodiment of this invention. The block diagram of the 5th Embodiment of this invention. The flowchart for demonstrating operation | movement of the elevator system which concerns on embodiment of this invention.

Explanation of symbols

1: Car cage 2: Car room 3: Car frame 4: Wall part 5: Moving cable 5a: Hanging part 5b, 5c: Flat surface 6A, 6B: Movable plate 7: Elastic member 8A, 8B: Displacement sensor 9: Fixed plate DESCRIPTION OF SYMBOLS 10: Support member 11: Elevator control apparatus 12: Car position calculating means 13: Cable state determination means 14: Operation control means 15: Electrical resistance line 16: Resistance change detection apparatus 17: DC power supply 18: Resistance meter 19: Optical fiber line 20 : Light quantity change detection device δA, δB: Displacement amount LA1, LA2: Upper and lower limit values of displacement amount δA LB1, LB2: Upper and lower limit values of displacement amount δB v: Car speed P: Car position

Claims (9)

Vertical direction by the extension and contraction of the moving cable based on the change of the moving cable weight according to the movement of the car position in the hoistway. A movable member capable of minute displacement to
A displacement amount detecting means for detecting a displacement amount of the movable member;
Whether or not the moving cable is caught by an obstacle in the hoistway based on a comparison between the detected displacement amount from the displacement amount detecting means and the upper and lower limit values set in advance according to the car position. Cable status determination means for determining whether or not
An elevator moving cable catch detection device characterized by comprising: The movable member is a movable plate supported by a car-side fixed member or a hoistway-side fixed member via an elastic member that expands and contracts according to the weight of the moving cable.
The elevator moving cable catch detection device according to claim 1. Using a non-contact displacement sensor as the displacement amount detection means,
The elevator moving cable catch detection device according to claim 1 or 2. Using a contact-type displacement sensor as the displacement amount detecting means,
The elevator moving cable catch detection device according to claim 1 or 2. An electric resistance wire that is attached over the entire length between the car-side end portion of the moving cable and the hoistway wall-side end portion, and causes a disconnection when the moving cable is caught;
A resistance change detecting means for constantly supplying a minute current to the electric resistance wire and detecting a resistance change when the electric resistance wire is cut;
Based on a detection signal from the resistance change detection unit, a cable state determination unit that determines whether or not the moving cable is caught by an obstacle in a hoistway;
An elevator moving cable catch detection device characterized by comprising: The electric resistance wire is spirally wound around and attached to the moving cable.
The elevator moving cable catch detection device according to claim 5. An optical fiber line that is attached over the entire length between the car-side terminal part of the moving cable and the hoistway wall-side terminal part, and that is cut or deformed when the moving cable is caught;
A light quantity change detecting means for constantly supplying an optical signal to the optical fiber line and detecting a light quantity change when the optical fiber line is cut or deformed;
Based on a detection signal from the light quantity change detection means, a cable state determination means for determining whether or not the moving cable is caught by an obstacle in a hoistway;
An elevator moving cable catch detection device characterized by comprising: The optical fiber wire is attached to the moving cable by being wound spirally,
The elevator moving cable catch detection device according to claim 7. The elevator moving cable catch detection device according to any one of claims 1 to 8,
When attempting to resume normal operation after the end of seismic control operation, provided that the moving cable catching detection device of the elevator did not detect the catching state of the moving cable even if the car was driven at a low speed for a predetermined distance or more. Operation control means for resuming normal operation of the elevator;
An elevator system characterized by comprising:

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