JP6779020B2 - Elevator rope anomaly detector - Google Patents

Description

The present invention relates to a rope abnormality detecting device for detecting an abnormality in an elevator rope.

In a general fishing bottle type elevator, one end of the main rope is connected to the car and the other end of the main rope is connected to the counterweight, and the car is raised and lowered by the hoisting machine. When the car moves up and down, the main rope moves back and forth between the car side of the hoisting machine and the counterweight side, and the weight of the main rope moves. In order to compensate for the weight of the moved main rope and eliminate the imbalance, a compen rope that is connected to the car and the balance weight and hangs downward is provided. Generally, when the car or the balance weight suddenly stops, a compensator is provided to prevent the car or the balance weight from jumping up due to inertia. The folded-back portion at the lower end of the compensating rope is wound around a compensating portion provided in the compensating device, and the compensating rope applies a predetermined tension to the compensating rope.

Usually, the elevator is provided with a rope abnormality detection device that detects an abnormality such as cutting or loosening of the rope. For example, Patent Document 1 describes a device for detecting a rope tension defect by using an inclination detecting piece that inclines when the tension of each main rope becomes uneven.

Further, as a rope abnormality detecting device, the device shown in FIG. 6 is known. This device is composed of a detection cam 102 provided in the compensator device 100 and a switch 106 with a roller (roller) 104. The compensating device 100 is provided with a compensating device 108, and a folded-back portion at the lower end of the compensating rope 110 is wound around the compensating device 108. The length of the detection cam 102 corresponds to the effective range of the switch 106, and the roller 104 is in contact with the detection cam 102 in the normal state. When the main rope and the compen rope 110 expand and contract, the compen device 100 moves up and down. If the amount of movement is within the effective range, the rope is determined to be normal. When the amount of movement exceeds the effective range and the roller 104 is in non-contact with the detection cam 102, the switch 106 is activated. An abnormality in the rope (for example, cutting or loosening of the rope) is detected and the elevator is stopped.

Japanese Unexamined Patent Publication No. 2011-16623

Generally, in the initial stage of rope replacement or in the season when the temperature changes greatly, the amount of expansion and contraction of the rope increases even if the rope does not have an abnormality. As described above, in a device that detects abnormalities in the rope by using a detection cam and a switch with rollers, if the effective range of the switch (length of the detection cam) for the amount of expansion and contraction of the rope is set incorrectly, the rope will be abnormal. Even though (cutting or loosening) has not occurred, the roller is in a non-contact state with the detection cam, and an abnormality in the rope is erroneously detected.

An object of the present invention is to enable accurate detection of rope abnormalities in an elevator.

The invention according to claim 1 is a compen rope provided so as to be suspended so as to maintain a balance with the main rope between a riding car and a counterweight that are connected via a main rope and move up and down, and the said. A rope socket for connecting a riding car, when the compen rope is connected to the end of the compen rope on the car side and tension is applied by the compen rope, and the tension of the compen rope is released. A movable rope socket, a detection unit for detecting a rope abnormality by detecting the movement of the rope socket, and a compensating rope provided in the rope socket when the tension of the compensating rope with respect to the rope socket is released. The compen rope includes an elastic member that presses the rope socket to move the rope socket, and the compen rope is composed of a plurality of individual ropes. The elastic member and the rope socket are provided for each individual rope. A hollow portion is formed inside the rope socket along the longitudinal direction of the rope socket, and one end of the individual rope is inserted into the inside of the hollow portion from the lower end of the rope socket. The elastic member is fixed so as to surround the individual rope at the lower end of the rope socket and is arranged around the individual rope, and one end of the elastic member is fixed to the lower end of the rope socket. The other end of the elastic member is fixed to a support member provided at a predetermined distance from the lower end of the rope socket, and the support member penetrates each individual rope in the thickness direction. A first through hole is formed, and the individual rope is inserted into each first through hole, and a second through hole penetrating in the lateral direction of the rope socket is formed on the upper side of the rope socket. The second through hole is formed and has a shape extending in the longitudinal direction of the rope socket, a socket pin is inserted through the second through hole, and the detection unit is the rope socket. It is a detection unit that detects a rope abnormality for each individual rope by detecting movement for each of the rope sockets, and the detection unit is arranged apart from the light source and said. The light source and the sensor unit include a sensor unit that detects light emitted from the light source, and the rope socket is placed at a position at a predetermined distance from the upper end to the upper side of the rope socket for each rope socket. The ropes are provided apart from each other. When the tension of the compensating rope with respect to the ket is released, the elastic member pushes the rope socket to a position where the optical path of the light emitted from the light source is blocked to move the rope socket, and the detection unit moves the rope socket. It is a rope abnormality detecting device of an elevator characterized in that it is determined that a rope abnormality has occurred when the light path of the light emitted from the light source is blocked by the rope socket and the light is not detected by the sensor unit. ..

According to the second aspect of the present invention, in the rope abnormality detecting device of the elevator according to the first aspect , the elastic member contracts when the tension of the compensating rope is applied to the rope socket, and the rope. This is an elevator rope abnormality detecting device, characterized in that when the tension of the compensating rope with respect to the socket is released, the rope socket is pressed to move the rope socket.

According to the present invention, it is possible to accurately detect an abnormality in a rope in an elevator.

It is a figure which shows the schematic structure of the elevator which concerns on embodiment of this invention. It is a figure which shows the rope abnormality detection apparatus which concerns on embodiment of this invention. It is a figure which shows the rope socket. It is a figure which shows the rope abnormality detection apparatus which concerns on embodiment of this invention. It is a figure which shows the rope socket. It is a figure which shows the rope abnormality detection apparatus which concerns on the prior art.

FIG. 1 shows an example of an elevator according to an embodiment of the present invention. The elevator 10 includes a car 12 and a counterweight 14. A hoisting machine 16 is installed above the hoistway. The main rope 18 is wound around the hoisting machine 16. One end of the main rope 18 is connected to the upper surface 12a of the car 12, and the car 12 is supported in a suspended state. The other end of the main rope 18 is connected to the upper surface 14a of the balance weight 14, and the balance weight 14 is supported in a suspended state. In this way, the car 12 and the counterweight 14 are connected to each other via the main rope 18, and the hoisting machine 16 drives the hoisting machine 16 to move up and down relatively in the hoistway.

When the car 12 moves up and down, the main rope 18 moves back and forth between the car 12 side of the hoist 16 and the counterweight 14 side, and the weight of the main rope 18 moves. In order to compensate for the weight of the moved main rope 18 and eliminate the imbalance, a compen rope 20 (balanced rope) that is connected to the car 12 and the balanced weight 14 and hangs downward is provided. A rope abnormality detecting device 22 described later is provided on the lower surface 12b of the car 12. One end of the compensating rope 20 is connected to the lower surface 12b of the car 12 via the rope abnormality detecting device 22. The other end of the compen rope 20 is connected to the lower surface 14b of the balance weight 14. In this way, by providing the compensating rope 20 between the car 12 and the balancing weight 14, the weight balance is maintained.

The rope abnormality detecting device 22 is a device for detecting an abnormality of a rope such as a main rope 18 or a compensating rope 20. The rope abnormality detecting device 22 will be described in detail later with reference to FIGS. 2 and 3.

A guide rail 26 extending in the direction perpendicular to the floor surface 24 (the elevating direction of the car 12) is fixed to the floor surface 24 in the hoistway of the elevator. A compensator 28 is provided on the guide rail 26. The compensator 28 is a device for preventing the car 12 or the counterweight 14 from jumping up due to an emergency stop or the like. The folded-back portion at the lower end of the compensating rope 20 is wound around a compensating wheel 30 (balance wheel) provided in the compensating device 28, and a predetermined tension is applied to the compensating rope 20 by the compensating wheel 30. The compensator 28 is movably guided along the guide rail 26 in the vertical direction (vertical direction).

When the main rope 18 or the compen rope 20 is stretched, the compensator 28 moves downward along the guide rail 26 so as to absorb the stretch and give tension to the main rope 18 or the compen rope 20. Further, when the car 12 or the counterweight 14 suddenly stops, and the compen rope 20 is pulled and the compen device 28 is pulled up, the compen device 28 moves with respect to the guide rail 26 at a position where the compen device 28 is raised to some extent. It has a function of locking and stopping. This prevents the car 12 or the counterweight 14 from jumping up due to inertia. That is, the compen device 28 applies tension to the compen rope 20 while moving downward as the main rope 18 and the compen rope 20 extend, and when the car 12 or the balance weight 14 jumps up, the guide It has a function of locking to the rail 26 to prevent its jumping up.

Hereinafter, the rope abnormality detecting device 22 will be described in detail with reference to FIGS. 2 to 5.

FIG. 2 shows the overall configuration of the rope abnormality detection device 22 in the normal state. The normal state is a state in which no abnormality (cutting, loosening, etc.) has occurred in the rope. The X, Y, and Z axes in FIG. 2 are axes orthogonal to each other, and these axes form an orthogonal three-dimensional coordinate system. FIG. 2 is a view when the rope abnormality detecting device 22 is viewed from the direction of the Y axis.

The rope abnormality detection device 22 includes a rope socket 32, a spring member 34 as an elastic member, a support member 36, a socket pin 38, and an optical sensor device 40 as a detector.

The rope socket 32 has a long shape in one direction and is a member to which the compensating rope 20 is fixed. A hollow portion 42 is formed in the rope socket 32 along the longitudinal direction (Z direction) of the rope socket 32, and one end of the compensating rope 20 is inserted into the hollow portion 42 from the lower end of the rope socket 32. Is fixed. As the fixing method, a known technique such as crimp fixing can be used. The compensating rope 20 is composed of a plurality of individual ropes 44 (four individual ropes 44 in the example shown in FIG. 2). Four rope sockets 32 are provided according to the number of individual ropes 44, and one end of the individual ropes 44 is inserted and fixed in the hollow portion 42 of each rope socket 32. Of course, the number of individual ropes 44 and rope sockets 32 is only an example, and the number may be other than four. The compensating rope 20 may be composed of one rope, and the rope may be fixed to one rope socket 32.

The plurality of rope sockets 32 are arranged in a row along, for example, the lateral direction (width direction (X direction)). One end of the spring member 34 is fixed to the lower end of each rope socket 32. The spring member 34 is arranged around the individual rope 44 at the lower end of the rope socket 32, for example, and surrounds the individual rope 44 and is fixed to the rope socket 32. The other end of the spring member 34 is fixed to the support member 36. The support member 36 is a member provided at a predetermined distance from the lower end of each rope socket 32, and is fixed to the lower surface 12b of the car 12 by, for example, a fixing member (not shown). In this way, each spring member 34 corresponding to each rope socket 32 is provided between the lower end of each rope socket 32 and the support member 36, and the spring member 34 supports the lower end of the rope socket 32. It is fixed to the member 36. The spring member 34 generates a force that pushes the rope socket 32 upward (in the direction indicated by the arrow 46).

The support member 36 is formed with a through hole 37 penetrating in the thickness direction (Z direction), and an individual rope 44 is inserted through the through hole 37. For example, a through hole 37 is formed for each individual rope 44. In the example shown in FIG. 2, four through holes 37 are formed in the support member 36, and individual ropes 44 are inserted through the through holes 37.

A through hole 48 is formed on the upper side of the rope socket 32 so as to penetrate the rope socket 32 in the lateral direction (X direction). The through hole 48 has a shape extending in the longitudinal direction (Z direction) of the rope socket 32. A socket pin 38 is inserted through the through hole 48. The socket pin 38 is a member having an elongated shape, and in the example shown in FIG. 2, the socket pin 38 is arranged so as to extend in the X direction. The length of the socket pin 38 in the lateral direction (length in the Z direction) is shorter than the length of the through hole 48 in the longitudinal direction (length in the Z direction). The socket pin 38 is fixed to the lower surface 12b of the car 12 by, for example, a fixing member (not shown).

Since one end of the individual rope 44 is fixed to the lower end of the rope socket 32, under normal conditions, the individual rope 44 applies a tension acting downward (in the direction indicated by the arrow 50) to the rope socket 32. Rope. This tension is the force applied by the compensator 28 described above. This tension is larger than the reaction force of the spring member 34 (the force that presses the rope socket 32). Therefore, in the normal state, the rope socket 32 is pulled downward and the spring member 34 is contracted.

The optical sensor device 40 is a device that detects a rope abnormality (cutting, loosening, etc.), and includes a light source 52 that emits light and a sensor unit 54 that detects the light. The light source 52 and the sensor unit 54 are provided at positions at a predetermined distance from the upper end of the rope socket 32 to the upper side (lower surface 12b side of the car 12), and are separated from each other with the plurality of rope sockets 32 in between. It is provided. The optical sensor device 40 is fixed to the lower surface 12b of the car 12. When the sensor unit 54 detects the light 56 from the light source 52, it is determined that the rope is normal, and when the sensor unit 54 does not detect the light 56 from the light source 52, it is said that an abnormality has occurred in the rope. It is judged.

A control device 58 is connected to the sensor unit 54. The control device 58 executes emergency measures such as urgently stopping the elevator according to the detection result from the sensor unit 54. Specifically, when the light 56 is detected by the sensor unit 54, the control device 58 determines that the rope is normal and does not stop the elevator in an emergency. When the light 56 is not detected by the sensor unit 54, the control device 58 determines that an abnormality has occurred in the rope and makes an emergency stop of the elevator.

FIG. 3 shows a rope socket 32, a spring member 34, a support member 36, and a socket pin 38 in a normal state. FIG. 3 is a view when the rope socket 32 is viewed from the direction of the X axis. A through hole 48 is formed on the upper side of the rope socket 32. The through hole 48 has a shape extending in the longitudinal direction (Z direction) of the rope socket 32. The rope socket 32 has, for example, a circular cross section, and the size of the cross section is smaller than the size of the through hole 48. For example, the vertical width (Z-direction width) of the circular cross section is smaller than the longitudinal width (Z-direction width) of the through hole 48. Further, the width of the circular cross section in the lateral direction (width in the Y direction) is also smaller than the width of the through hole 48 in the lateral direction (width in the Y direction).

Under normal conditions, the tension of the individual ropes 44 pulls the rope socket 32 downward (in the direction indicated by the arrow 50). Since the socket pin 38 is fixed to the lower surface 12b of the car 12, the position of the socket pin 38 does not change. Since the rope socket 32 moves downward due to the tension of the individual rope 44, the socket pin 38 is arranged relatively upward in the through hole 48 of the rope socket 32.

Next, the operation of the rope abnormality detecting device 22 when an abnormality occurs in the rope will be described with reference to FIGS. 4 and 5.

FIG. 4 shows the overall configuration of the rope abnormality detecting device 22 when a rope abnormality occurs. FIG. 5 shows a rope socket 32 and the like when a rope abnormality occurs. For example, when the main rope 18 or the compensating rope 20 (individual rope 44) is cut, when the rope extends and the compensating device 28 reaches the floor surface 24 (pit surface), the rope shrinks or foreign matter bites into the compensating rope 30. When the rail is removed due to crowding, the tension of the compensating rope 20 (individual rope 44) applied to the rope socket 32 is released. As a result, the rope socket 32 is pushed upward (in the direction indicated by the arrow 46) by the repulsive force (spring force) of the spring member 34, and the upper end portion of the rope socket 32 enters the optical path of the light 56 and blocks the optical path. .. As a result, the light 56 emitted from the light source 52 is not detected by the sensor unit 54. In this case, the control device 58 determines that an abnormality (cutting, loosening, etc.) has occurred in the rope, and makes an emergency stop of the elevator, for example. In the example shown in FIG. 4, an abnormality (cutting, loosening, etc.) has occurred in the individual rope 44 on the left side, and tension is not applied to the rope socket 32 connected to the individual rope 44. Therefore, the rope socket 32 is pushed upward (in the direction indicated by the arrow 46) by the spring force of the spring member 34, blocking the optical path of the light 56. As a result, an abnormality in the rope is detected.

In the present embodiment, when the tension of the compensating rope 20 (individual rope 44) is released and the rope socket 32 is pushed upward (in the direction indicated by the arrow 46), the upper end of the rope socket 32 is an optical path of light 56. The position of the through hole 48 in the rope socket 32 and the length of the through hole 48 in the longitudinal direction (Z direction) are determined so as to block the rope socket 32.

As described above, when the tension of the compensating rope 20 (individual rope 44) applied to the rope socket 32 is released, the rope socket 32 blocks the optical path of the light 56, thereby detecting an abnormality of the rope. It becomes possible.

According to the present embodiment, when the main rope 18 or the compen rope 20 (individual rope 44) is cut, the main rope 18 or the compen rope 20 is stretched to the extent that the compen device 28 reaches the floor surface 24 (pit surface). When this occurs or when derailing occurs, tension is not applied from the compensating rope 20 (individual rope 44) to the rope socket 32, and it is determined that an abnormality has occurred in the rope. That is, when an abnormality that causes the above situation, for example, cutting or loosening occurs in the main rope 18 or the compensating rope 20 (individual rope 44), the rope abnormality is detected. In this way, it is possible to detect only the situation where the rope is cut or loosened as a rope abnormality, and the expansion and contraction of the rope that does not reach that degree is not detected as an abnormality. Therefore, it is possible to prevent erroneous detection of rope abnormality.

For example, when the compen device 28 is stretched to the extent that it does not reach the floor surface 24 (pit surface) on the main rope 18 or the compen rope 20, tension is applied to the compen rope 20 by the compen device 28, and the compen rope 20 is tensioned. The tension of the rope 20 pulls the rope socket 32 downward (in the direction indicated by the arrow 50). In this case, since the upper end of the rope socket 32 does not block the optical path of the light 56, it is possible to prevent erroneous detection of the rope abnormality. On the other hand, in the rope abnormality detecting device according to the prior art shown in FIG. 6, the switch is switched even when the main rope or the compen rope is stretched to the extent that the compen device does not touch the floor surface. Depending on the setting of the effective range of 106, the roller 104 will be in a non-contact state with the detection cam 102, and a rope abnormality will be erroneously detected. In the present embodiment, it is possible to avoid such false detection.

An optical sensor device 40 may be provided for each rope socket 32. Specifically, a light source 52 and a sensor unit 54 are provided for each individual rope socket 32, and when tension from the individual rope 44 is no longer applied, the upper end portion of the rope socket 32 becomes the rope socket 32. The optical path of the light 56 from the light source 52 corresponding to the above may be blocked. Thereby, the abnormality can be detected for each individual rope 44. In addition, it is possible to identify the individual rope 44 in which the abnormality has occurred.

According to the present embodiment, maintenance work for setting the effective range of the switch 106 according to the prior art (for example, adjustment work of the effective range of the switch 106, entry / exit into the hoistway for that purpose, etc.) becomes unnecessary. Improves safety and efficiency. Further, the wiring for the rope abnormality detecting device 22 can be installed only around the car 12, and the rope abnormality can be detected with a simple structure. This makes it possible to reduce the manufacturing cost.

10 elevator, 12 car, 14 balance weight, 18 main rope, 20 compen rope, 22 rope abnormality detection device, 28 compen device, 32 rope socket, 34 spring member, 36 support member, 38 socket pin, 40 optical sensor device , 44 individual ropes, 52 light sources, 54 sensor units, 56 lights, 58 control devices.

Claims (2)

A rope that connects the riding cage and the compensating rope that is hung so as to maintain balance with the main rope between the riding cage and the counterweight that are connected via the main rope and move up and down. A rope socket that is a socket that is connected to the end of the compen rope on the car side and is tensioned by the compen rope and can be moved when the tension of the compen rope is released.
A detection unit that detects rope abnormalities by detecting the movement of the rope socket, and
An elastic member provided on the rope socket that pushes the rope socket to move the rope socket when the tension of the compensating rope with respect to the rope socket is released.
Including
The compen rope is composed of a plurality of individual ropes.
The elastic member and the rope socket are provided for each individual rope.
A hollow portion is formed inside the rope socket along the longitudinal direction of the rope socket.
One end of the individual rope is inserted and fixed inside the hollow portion from the lower end of the rope socket.
The elastic member is arranged around the individual rope so as to surround the individual rope at the lower end of the rope socket.
One end of the elastic member is fixed to the lower end of the rope socket.
The other end of the elastic member is fixed to a support member provided at a predetermined distance from the lower end of the rope socket.
The support member is formed with a first through hole penetrating in the thickness direction of each individual rope.
The individual rope is inserted through each first through hole.
A second through hole is formed on the upper side of the rope socket so as to penetrate in the lateral direction of the rope socket.
The second through hole has a shape extending in the longitudinal direction of the rope socket.
A socket pin is inserted through the second through hole.
The detection unit is a detection unit provided for each rope socket and detects a rope abnormality for each individual rope by detecting movement for each rope socket.
The detection unit includes a light source and a sensor unit that is arranged apart from the light source and detects light emitted from the light source.
The light source and the sensor unit are provided for each of the rope sockets at positions at a predetermined distance from the upper end of the rope socket to the upper side with the rope socket in between.
When the tension of the compensating rope with respect to the rope socket is released, the elastic member pushes the rope socket to a position where it blocks the optical path of the light emitted from the light source to move the rope socket.
The detection unit determines that a rope abnormality has occurred when the optical path of the light emitted from the light source is blocked by the rope socket and the light is not detected by the sensor unit.
An elevator rope abnormality detection device characterized by this. In the elevator rope abnormality detection device according to claim 1,
The elastic member contracts when the tension of the compen rope is applied to the rope socket, and when the tension of the compen rope with respect to the rope socket is released, the rope socket is pressed against the rope. Move the socket,
An elevator rope abnormality detection device characterized by this.

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