JP2009096571A - Rope detachment preventing device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rope detachment preventing device capable of independently detecting an abnormal state of each of ropes for each rope unit before each of the plurality of ropes wound around a sheave is detached from the sheave and preventing damage of the sheave, a rope guard body, etc. due to vibration of the ropes. <P>SOLUTION: The rope guard body 32 set to face against the sheave 10 and free to move toward the sheave 10 is arranged. This rope guard body 32 has a plurality of groove parts 32a provided in parallel in correspondence with each of the ropes 14 and formed in a curved shape to cover each of these ropes 14. A plurality of detectors 34a, 34b set on each of the groove parts 32a of the rope guard body 32 are provided in correspondence with each of the ropes 14, and are devised to respectively detect contact with these ropes 14. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rope detachment preventing device that is installed in the vicinity of a sheave attached to an elevator hoisting machine and prevents a plurality of ropes wound in parallel to the sheave from falling off the sheave. Each rope unit can detect the abnormal state of each rope independently before the multiple wound ropes fall off from the sheave, and the vibration of the rope can damage the sheave and the rope guard body. The present invention relates to a rope detachment prevention device that can prevent the above.

  Conventionally, various types of rope detachment prevention devices for preventing a main rope from falling off from a main sheave attached to an elevator hoist are known (see, for example, Patent Document 1). An example of a conventional rope detachment prevention device is shown in FIG. FIG. 5 is a top view of one rope detachment preventing device in a conventional elevator as viewed from above.

  As shown in FIG. 5, the main sheave 10 is provided with a plurality of U-shaped grooves 10a in parallel, and a main rope 14 is fitted in each groove 10a. A rope detachment preventing device 60 is installed in the vicinity of the main sheave 10. The rope detachment prevention device 60 includes an attachment fitting 61, a columnar detachment prevention portion 62 attached to the attachment fitting 61, and a U-shaped switch attachment attached to the attachment fitting 61 outside the detachment prevention portion 62. A metal fitting 64 and an operation switch 66 attached to the tip of the switch attachment metal fitting 64 are provided.

  In the following, details of each component of one rope detachment preventing device 60 in such a conventional elevator will be described.

  In the rope detachment prevention device 60, one end (left end in FIG. 5) of the mounting bracket 61 is attached to the side surface of the elevator hoisting machine. Further, a detachment preventing portion 62 is attached to the other end of the mounting bracket 61 by a nut 63 so as to have a gap of, for example, about 3 mm with the main rope 14 supported on the outer periphery of the main sheave 10. In addition, a switch mounting bracket 64 bent in a U shape is mounted on the mounting bracket 61 with a bolt 65 on the outside of the locking portion 62. At the other end of the switch mounting bracket 64, an operation switch 66 connected to an elevator control panel (not shown) via a lead wire 67 is mounted. At this time, these members are arranged so that a gap is formed between the locking part 62 and the operation switch 66 during normal operation of the elevator.

  When an earthquake occurs and one main rope 14 falls off the groove 10a of the main sheave 10 and rides on the outer peripheral surface 10b of the main sheave 10 between the adjacent grooves 10a as shown by the arrows in FIG. As shown by the chain line in FIG. 5, the anti-slip portion 62 is deformed to the position of reference numeral 62 ', and the operation switch 66 is operated, whereby an abnormal state can be detected. The operation signal of the operation switch 66 is taken into the elevator control panel and the operation of the elevator is electrically stopped, so that the main sheave 10 slips and damages the main rope 14. A dangerous situation can be avoided.

JP 2001-163541 A

  However, the conventional rope detachment preventing device 60 as shown in FIG. 5 has the following various problems.

  First, in the conventional rope detachment prevention device 60, the main rope 14 falls off from the groove portion 10a of the main sheave 10, and the main rope 14 rides on the outer peripheral surface 10b of the main sheave 10 between the adjacent groove portions 10a. An abnormal state is detected only after the state is reached, and the main rope 14 is damaged.

  Further, the main rope 14 that has run on the outer peripheral surface 10b of the main sheave 10 due to the earthquake cannot slide when it is elastically deformed while being sandwiched between the outer peripheral surface 10b and the locking portion 62, The damage of the main rope 14 is increased.

  Further, with respect to the main rope 14 wound around the groove portion 10a of the main sheave 10, a plurality of main ropes 14 are generally arranged side by side as shown in FIG. In this case, since the force acting on each main rope 14 at the time of the occurrence of an earthquake varies, when the slip-off preventing portion 62 is elastically deformed by the force acting on the main rope 14, the fixed end (the nut 63 side) of the slip-off preventing portion 62. Is located inside the main sheave 10, the distance between the main rope 14 on the outside (the lower side in FIG. 5) and the locking portion 62 becomes large. As a result, there arises a problem that the outer main rope 14 is more likely to come off than the inner side.

  The present invention has been made in consideration of the above points, and detects an abnormal state of each rope independently for each rope unit before each of the ropes wound around the sheave falls off the sheave. Another object of the present invention is to provide an elevator rope slip-off preventing device that can prevent sheaves and rope guard bodies from being damaged by rope vibration.

  The elevator rope disengagement device of the present invention is installed in the vicinity of a sheave attached to the elevator hoisting machine, and the rope disengagement for preventing a plurality of ropes wound in parallel with the sheave from falling off the sheave. It is a stopping device, is installed so as to face the sheave, is movable toward the sheave, and is provided in parallel with each of the ropes so as to cover each of the ropes. A rope guard body having a plurality of grooves, a plurality of detectors provided corresponding to each rope in each groove of the rope guard body, and detecting each contact with the rope, and each detector When the contact with each corresponding rope, a detection signal is sent from the detector, and the elevator hoisting machine is controlled based on the detection signal. Between the control means and the rope guard body spaced apart from the sheave, and the rope fixing position where the groove of the rope guard body contacts or approaches each rope wound around the sheave. A rope guard main body drive unit for moving the rope guard main body so as to move the rope guard main body from the separated position to the rope fixing position based on a detection signal sent from the detector. The drive unit is controlled.

  According to such a rope detachment prevention device, since each groove portion formed in the rope guard body covers the corresponding rope, before the ropes wound around the sheave fall off from the sheave. In addition, each detector can detect an abnormal state of each rope. Moreover, since each detector provided in each groove part can contact each corresponding rope individually, the abnormal state of each rope can be detected independently for every rope unit. Furthermore, when the rope vibrates due to the occurrence of an earthquake, etc., the rope guard body drive unit moves the rope guard body from the separated position to the rope fixing position, thereby allowing the rope guard body to move between the rope wrapped around the sheave and the rope guard body. The gap can be made zero or small. For this reason, it can be prevented that the rope vibrates due to the occurrence of an earthquake or the like and collides with the sheave or the rope guard body many times, and the sheave, the rope guard body, or the rope itself is damaged.

  In the elevator rope disengagement apparatus according to the present invention, the elevator rope further includes an attachment member attached to the elevator hoisting machine, and an elastic member provided between the attachment member and the rope guard body, and the control means Normally, when the rope guard body is positioned at the separated position by the repulsive force of the elastic member, and the rope guard body is moved from the separated position to the rope fixing position based on the detection signal sent from the detector. And controlling the rope guard body drive unit to move the rope guard body toward the sheave against the repulsive force by the elastic member by applying a force toward the sheave to the rope guard body. It is preferable to carry out. Here, “normal time” means a time when no earthquake occurs. Thus, when the safety of the elevator is confirmed, the rope guard body can be automatically returned from the rope fixing position to the separated position by the repulsive force of the elastic member. At this time, the elastic member is particularly preferably a spring.

  The elevator rope disengagement device according to the present invention preferably further comprises notification means for notifying the outside when the control means receives a detection signal from the detector. As a result, the worker can recognize that an abnormality has occurred in the rope due to the occurrence of an earthquake or the like.

  In the elevator rope detachment preventing device of the present invention, it is preferable that two or more of each of the detectors is installed for each groove portion in the rope guard body. As a result, it is possible to more quickly and reliably detect that the rope has fallen out of the sheave and is accommodated in the groove as compared with the case where only one proximity sensor is provided in each groove.

  According to the elevator rope disengagement device of the present invention, it is possible to detect an abnormal state of each rope independently for each rope unit before each of the ropes wound around the sheave is dropped from the sheave. It is possible to prevent the sheave or the rope guard body from being damaged by the vibration of the rope.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 to FIG. 4 are views showing an embodiment of an elevator rope detachment preventing device according to the present invention.
Among these, FIG. 1 is a schematic configuration diagram showing an outline of the overall configuration of the elevator in the present embodiment, and FIG. 2 is an enlarged configuration diagram in the vicinity of the elevator hoisting machine in the elevator shown in FIG. FIG. 3 is a top view of the rope detachment preventing device in the elevator shown in FIG. 2 as viewed from above, and shows a state when the rope guard body is in a separated position separated from the sheave. 4 is a top view of the rope detachment preventing device in the elevator shown in FIG. 2 as viewed from above, and the rope guard body comes into contact with or approaches each rope wound around the sheave. It is a figure which shows a state when it exists in such a rope fixed position.

First, the outline of the whole structure of an elevator is demonstrated using FIG.
In the elevator as shown in FIG. 1, a main rope 14 having one end connected to the upper surface of the car 16 and the other end connected to the upper surface of the counterweight 18 is hung on the main sheave 10 and the deflecting sheave 12. A plurality of main ropes 14 are provided in parallel. The main sheave 10 is driven to rotate by an elevator hoisting machine 11, and the car 16 is moved up and down in the hoistway 15 by driving the elevator hoisting machine 11. A compen- sion rope 20 having ends connected to the bottom surface of the car 16 and the bottom surface of the counterweight 18 is provided, and a compensatory 22 is hung on the compen- sion rope 20. A plurality of compen ropes 20 are also provided in parallel. Due to the weight of the compensatory 22, tension is applied to the annular rope combination including the main rope 14 and the compen- sion rope 20 as shown in FIG. 1.

  Further, as shown in FIG. 2, a rope detachment preventing device 30 is installed in the vicinity of the main sheave 10. The rope detachment prevention device 30 is for preventing the plurality of main ropes 14 wound in parallel around the main sheave 10 from dropping off from the main sheave 10. Details of the configuration of the rope detachment prevention device 30 will be described later.

  Further, an elevator control panel 50 that performs overall control of the elevator is installed in the vicinity of the hoistway 15. The elevator control panel 50 includes a controller 52 that controls the elevator hoisting machine 11 and a stopper unit 42 of the rope detachment preventing device 30 that will be described later, and a notification device that notifies a worker or the like by voice or a monitor screen. 54 and a memory 56 connected to the controller 52 are incorporated. Details of each component in the elevator control panel 50 will be described later.

  Next, details of the configuration of the main sheave 10 and the rope detachment preventing device 30 will be described with reference to FIGS. 3 and 4. 3 and 4, an example in which three main ropes 14 are provided in parallel is described. However, the number of main ropes 14 is not limited to three.

  The main sheave 10 is provided with three groove portions 10 a in parallel so as to correspond to the three main ropes 14. Each of the grooves 10a has a substantially semicircular U shape into which the corresponding main rope 14 can be fitted.

  In the main sheave in the conventional elevator, the outer peripheral surface 10n between the adjacent groove portions 10a and 10a is lower than the outer peripheral surface 10m outside the groove portion 10a as shown by the chain line in FIG. . However, in the main sheave 10 in the present embodiment, as shown by the solid line in FIG. 3, the outer peripheral surface 10p between the adjacent groove portions 10a and 10a is almost the same height as the outer peripheral surface 10m on both outer sides of the groove portion 10a. It has become. As a result, the groove portion 10a of the main sheave 10 becomes substantially deep, and the main rope 14 becomes difficult to drop off from the groove portion 10a.

  On the other hand, the rope detachment preventing device 30 includes a mounting bracket 31 having one end attached to the side surface of the elevator hoisting machine 11, and a rope guard main body 32 provided to be movable in the left-right direction in FIG. And detectors (specifically, proximity sensors 34a and 34b) provided in each groove 32a (described later) of the rope guard body 32.

  Hereinafter, each component of such a rope detachment preventing device 30 will be described in detail.

The mounting bracket 31 is made of a plate-like member, and as described above, one end (not shown) on the left side in FIG. 3 is attached to the side surface of the elevator hoisting machine 11 with a bolt or the like. Thereby, the mounting bracket 31 is fixed in position. Further, a substantially L-shaped first bracket 48 for holding a spring is fixed to a side surface (upper surface in FIG. 3) of the mounting bracket 31 by a bolt 48a or the like.
Further, a substantially L-shaped third bracket 40 for holding the stopper unit is fixed to the side surface (upper surface in FIG. 3) of the right end portion of the mounting bracket 31 in FIG. 3 by a bolt 40a or the like. . Further, on the side surface of the mounting bracket 31 (the upper surface in FIG. 3), a substantially L-shaped second for holding the spring is provided between the first bracket 48 for holding the spring and the third bracket 40 for holding the stopper unit. A bracket 46 is provided so as to be movable in the left-right direction in FIG. Here, as shown in FIGS. 3 and 4, the first bracket 48 attached to the side surface of the mounting bracket 31 and the second bracket 46 movably provided on the side surface of the mounting bracket 31 face each other. An elastic member, specifically, a spring 47 is provided between the brackets 46 and 48. Due to the repulsive force of the spring 47, a force that moves away from the first bracket 48 is always applied to the second bracket 46.

  In addition, a stopper unit 42 including an electromagnet is provided on the third bracket 40 attached to the right end of the mounting bracket 31 in FIG. The stopper unit 42 is provided with a cylinder pin 44, and the tip of the cylinder pin 44 (the left side end in FIG. 3) is fixed to a second bracket 46 for holding a spring. Here, when a drive signal is sent from the controller 52 of the elevator control panel 50 to the stopper unit 42, the electromagnet is energized in the stopper unit 42 to generate an electromagnetic force, whereby the cylinder pin 44 is moved in the direction of arrow A in FIG. The second bracket 46 is moved to the left (see FIG. 4). When the drive signal is not sent from the controller 52 to the stopper unit 42, the second bracket 46 and the cylinder pin 44 move to the right in FIG.

  As shown in FIGS. 3 and 4, in the mounting bracket 31, an elongated hole extending in the left-right direction in FIG. 3 is provided between the first bracket 48 for holding the spring and the third bracket 40 for holding the stopper unit. 31a is formed. The long hole 31 a penetrates the mounting bracket 31. A bolt 46 a having a rod-like portion 46 b that penetrates the elongated hole 31 a is attached to the second bracket 46 for holding the spring, and this bolt 46 a is attached to the rope guard body 32. As a result, the second bracket 46 and the rope guard body 32 are moved together via the bolt 46a. More specifically, as shown in FIG. 3, a bolt 46a is attached between the second bracket 46 and the rope guard body 32, so that the second bracket 46 and the rope guard body 32 are as shown in FIG. Although the rod 46b of the bolt 46a cannot move in the vertical direction, the second bracket 46 and the rope guard body 32 can move in the horizontal direction of FIG. 3 by moving along the elongated hole 31a extending in the horizontal direction of FIG. It can move freely in any direction.

  The rope guard body 32 is installed so as to face the main sheave 10 and is movable toward the main sheave 10 as described above. The rope guard body 32 has three groove portions 32a in parallel so as to correspond to the three main ropes 14, respectively. Each groove portion 32a is U-shaped so as to cover the main rope 14 as shown in FIG.

  Here, when the drive signal is not sent from the controller 52 to the stopper unit 42 and the second bracket 46 is at a position away from the first bracket 48, the rope guard body 32 is connected to the main body as shown in FIG. It is in a separated position separated from the sheave 10 by a certain distance. Here, when the rope guard body 32 is in the separation position, the separation distance between the rope guard body 32 and the main sheave 10 is within a range in which the rope guard body 32 does not contact the rotating main sheave 10. It is preferable to make it as small as possible. Specifically, the distance between the main rope 14 and the proximity sensors 34a and 34b (described later) provided in the groove 32a of the rope guard main body 32 before each main rope 14 is completely removed from the main sheave 10. The size is preferably set so as to come into contact.

  On the other hand, when a drive signal is sent from the controller 52 to the stopper unit 42 and the second bracket 46 is positioned so as to approach the first bracket 48, the rope guard main body 32 has a main sheave as shown in FIG. 10 is in a rope fixing position where the groove portion 32a of the rope guard body 32 contacts or approaches each rope 14 wound around the rope 10. When the stopper unit 42 moves the second bracket 46 in the left-right direction in FIG. 3, the rope guard body 32 reciprocates between the separated position as shown in FIG. 3 and the rope fixing position as shown in FIG. Moving.

  As shown in FIG. 3, the combination of the proximity sensors 34 a and 34 b is installed in each groove 32 a in the rope guard main body 32. The rope guard body 32 is provided with a total of three sets of proximity sensors 34a and 34b as shown in FIG. Such a combination of proximity sensors 34 a and 34 b is provided corresponding to each main rope 14, and detects contact with the main rope 14. Specifically, each of the proximity sensors 34 a and 34 b detects the magnitude of impact and the number of times of contact at the time of contact with the main rope 14.

  Here, two proximity sensors 34a and 34b are installed in each groove portion 32a of the rope guard main body 32 so as to be bilaterally symmetric when viewed from above. For this reason, compared with the case where only one proximity sensor is provided in each groove 32a, it is detected more quickly and reliably that the main rope 14 is dropped from the main sheave 10 and is accommodated in the groove 32a. can do. The number of proximity sensors installed in each groove portion 32a of the rope guard body 32 is not limited to two, and may be three or more. In this case, the main rope 14 is dropped from the main sheave 10. Thus, it can be detected more quickly and reliably that it is accommodated in the groove 32a.

  One end of a lead wire 35 is connected to each proximity sensor 34a, 34b. The other ends of these lead wires 35 are connected to the controller 52 as shown in FIG. 1, and detection signals are sent to the controller 52 from the proximity sensors 34a and 34b.

  Next, each component of the elevator control panel 50 in which the controller 52, the alarm device 54, the memory 56, and the like are built will be described in detail.

  The controller 52 is configured to send detection signals from the proximity sensors 34a and 34b when the proximity sensors 34a and 34b come into contact with the corresponding main ropes 14. The controller 52 is configured to control the elevator hoist 11 and the stopper unit 42 based on the detection signal.

  More specifically, the main rope 14 vibrates due to the occurrence of an earthquake or the like, and the magnitude or the number of contacts detected by the proximity sensors 34a and 34b is larger than the preset magnitude or the number of contacts. At this time, the controller 52 controls the elevator hoist 11 and the stopper unit 42. Here, information related to the magnitude of the impact or the number of contacts set in advance is stored in a memory 56 connected to the controller 52 in the elevator control panel 50.

  When the controller 52 controls the elevator hoisting machine 11, the elevator hoisting machine 11 is immediately stopped based on the magnitude of the impact detected by the proximity sensors 34 a and 34 b and the number of times of contact. First, the elevator hoisting machine 11 is switched to low speed operation, and after the car 16 is moved to the entrance / exit on each floor, the controller 52 is selected to stop the elevator hoisting machine 11.

  Further, when the main rope 14 vibrates due to the occurrence of an earthquake or the like, and the magnitude or the number of contacts detected by the proximity sensors 34a and 34b becomes larger than the preset magnitude or the number of contacts. The controller 52 sends a drive signal to the stopper unit 42 to move the cylinder pin 44 to the left in FIG.

  In addition, an alarm device 54 is connected to the controller 52 in the elevator control panel 50. The alarm 54 is specifically composed of, for example, a monitor or an alarm device. When the controller 52 receives a detection signal from the proximity sensors 34a and 34b, this is reported to a worker or the like by voice or monitoring. This screen is used for notification. As a result, the worker can recognize that an abnormality has occurred in the main rope 14 due to the occurrence of an earthquake or the like.

  Hereinafter, the operation of the elevator having such a configuration and the rope detachment preventing device will be described.

In the elevator as shown in FIGS. 1 to 4, the rope guard main body 32 is in the separated position as shown in FIG. 3 in a normal time when no earthquake occurs. Here, when an earthquake occurs, the main rope 14 tends to come off from the groove 10 a of the main sheave 10. However, before the main rope 14 is completely removed from the groove 10a, the main rope 14 is fitted into the U-shaped groove 32a of the rope guard main body 32 and contacts the proximity sensor 34a or 34b installed in the groove 32a. Thus, it is detected in the proximity sensors 34a and 34b that the main rope 14 is about to be detached from the groove 10a.
Specifically, the proximity sensors 34 a and 34 b detect the magnitude of impact and the number of times of contact when in contact with the main rope 14. Thereafter, the proximity sensor 34a sends a detection signal to the controller 52 of the elevator control panel 50, and the controller 52 controls the elevator hoist 11 and the stopper unit 42 based on the detection signal.

  More specifically, the controller 52 does not start the elevator winding until the magnitude or the number of contacts detected by the proximity sensors 34a and 34b becomes larger than the preset magnitude or the number of contacts. The upper machine 11 and the stopper unit 42 are controlled. Here, the preset magnitude of impact or the number of contacts is stored in the memory 56 connected to the controller 52 in the elevator control panel 50. When the controller 52 controls the elevator hoisting machine 11, the controller 52 first sets the elevator hoisting machine 11 to low speed operation based on the magnitude of the impact detected by the proximity sensors 34a and 34b and the number of contacts. After switching and moving the passenger car 16 to the entrance / exit of each floor, either the elevator hoisting machine 11 is stopped or the elevator hoisting machine 11 is immediately stopped.

  Further, when the magnitude of impact or the number of contacts detected by the proximity sensors 34a and 34b becomes larger than the preset magnitude of impact or the number of contacts, the controller 52 sends a drive signal to the stopper unit 42. The cylinder pin 44 is moved to the left in FIG. As a result, the second bracket 46 moves to the left in FIG. 3 against the repulsive force of the spring 47, and the rope guard body 32 also moves to the left in FIG. 3 together with the second bracket 46. In this way, the rope guard main body 32 reaches the rope fixing position as shown in FIG. When the rope guard body 32 is in the rope fixing position, the main ropes 14 wound around the main sheave 10 and the groove portions 32a of the rope guard body 32 come into contact with or approach each other.

  In this way, when an earthquake occurs, the controller 52 controls the elevator hoisting machine 11 to finally stop the elevator.

  Thereafter, when the safety of the elevator is confirmed, the control unit 52 does not send a drive signal to the stopper unit 42. Accordingly, the second bracket 46 is automatically moved away from the first bracket 48 by the repulsive force of the spring 47, and the rope guard body 32 is moved from the rope fixing position as shown in FIG. 4 as shown in FIG. Automatically move to the separation position.

  As described above, according to the elevator rope detachment preventing device 30 as in the present embodiment, each groove portion 32a formed in the rope guard body 32 covers the corresponding main rope 14 respectively. Each of the proximity sensors 34a and 34b can detect an abnormal state of each main rope 14 before the main ropes 14 wound around the main sheave 10 are dropped from the main sheave 10. Moreover, since each proximity sensor 34a, 34b provided in each groove part 32a can contact each main rope 14 corresponding to each, the abnormality of each main rope 14 independently for every main rope 14 unit. The state can be detected. Furthermore, when the main rope 14 vibrates due to the occurrence of an earthquake or the like, the stopper guard 42 moves the rope guard body 32 from the separated position as shown in FIG. 3 to the rope fixed position as shown in FIG. The gap between the main rope 14 wound around the main sheave 10 and the rope guard body 32 can be reduced to zero or small. For this reason, the main rope 14 vibrates and collides with the main sheave 10 or the rope guard body 32 many times due to the occurrence of an earthquake or the like, and the main sheave 10, the rope guard body 32, or the main rope 14 itself is damaged. Can be prevented.

  Further, since the spring 47 is provided, the rope guard body 32 can be automatically returned from the rope fixing position as shown in FIG. 4 to the separated position as shown in FIG. become able to.

Note that the elevator rope slip-off preventing device according to the present embodiment is not limited to the above-described aspect, and various modifications can be made.
For example, instead of the rope shedding device 30 being installed near the main sheave 10, a rope shedding device having substantially the same configuration as the rope shedding device 30 shown in FIGS. You may come to be. The rope slip prevention device installed in the vicinity of the deflecting sheave 12 is used to prevent the plurality of main ropes 14 wound in parallel around the deflecting sheave 12 from dropping from the deflecting sheave 10.

  The means for moving the rope guard main body 32 is not limited to the stopper unit 42 including an electromagnet as described above, and a driving mechanism using a damper or a gear can be used.

  Moreover, about the operation at the time of restoration of an elevator, it is possible to enable recovery by remote operation by adopting a configuration using a signal from a camera that can monitor the rope slip prevention device 30 and an information terminal.

It is a schematic structure figure showing the outline of the whole elevator composition in one embodiment of the present invention. It is an enlarged block diagram of the elevator hoisting machine vicinity in the elevator shown in FIG. It is the top view which looked at the rope slip prevention apparatus in the elevator shown in FIG. 2 from the top, Comprising: It is a figure which shows a state when a rope guard main body exists in the separation position spaced apart with respect to the sheave. It is the top view which looked at the rope detachment prevention device in the elevator shown in FIG. 2 from the top, and the rope guard body is in an approach position where the groove portion of the rope guard body approaches each rope wound around the sheave It is a figure which shows the state of. It is the top view which looked at one rope detachment prevention device in the conventional elevator from the top.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Main sheave 10a Groove part 10b, 10m, 10n, 10p Outer peripheral surface 11 Elevator hoisting machine 12 Bending sheave 14 Main rope 15 Hoistway 16 Riding car 18 Balance weight 20 Compen rope 22 Compensation sheave 30 Rope derailment device 31 Mounting bracket 31a Long Hole 32 Rope guard body 32a Groove 34a, 34b Proximity sensor 35 Lead wire 40 Third bracket 40a Bolt 42 Stopper unit 44 Cylinder pin 46 Second bracket 46a Bolt 46b Rod-shaped portion 47 Spring 48 First bracket 48a Bolt 50 Elevator control panel 52 Control 54 Alarm 60 Memory 60 Rope detachment prevention device 61 Mounting bracket 62 Locking stop portion 63 Nut 64 Switch mounting bracket 65 Bolt 66 Actuation switch 67 Lead wire

Claims (5)

A rope detachment prevention device that is installed in the vicinity of a sheave attached to an elevator hoisting machine and prevents a plurality of ropes wound in parallel with the sheave from falling off the sheave.
A plurality of grooves that are installed so as to face the sheave and are movable toward the sheave, and are provided in parallel corresponding to the ropes, and are curved so as to cover the ropes. A rope guard body having:
A plurality of detectors provided corresponding to each rope in each groove portion of the rope guard body, each detecting contact with the rope;
When each detector comes into contact with each corresponding rope, a detection signal is sent from the detector, and control means for controlling the elevator hoisting machine based on the detection signal;
A rope guard that moves the rope guard body between a separated position separated from the sheave and a rope fixing position where a groove portion of the rope guard body contacts or approaches each rope wound around the sheave. A body drive unit;
With
The said control means controls the said rope guard main body drive part so that the said rope guard main body may be moved to the said rope fixed position from the said separation position based on the detection signal sent from the said detector. Rope detent device. An attachment member attached to the elevator hoist, and an elastic member provided between the attachment member and the rope guard body,
The control means normally positions the rope guard body in a separated position by a repulsive force of the elastic member, and moves the rope guard body from the separated position to the rope fixing position based on a detection signal sent from the detector. The rope guard body is moved toward the sheave against the repulsive force of the elastic member by applying a force toward the sheave to the rope guard body when moving the rope guard body. 2. The elevator rope disengagement device according to claim 1, wherein the drive unit is controlled.   The elevator rope detachment preventing device according to claim 2, wherein the elastic member is a spring.   The elevator rope dislodging according to any one of claims 1 to 3, further comprising notification means for notifying the outside when the control means receives a detection signal from the detector. Stop device.   5. The elevator rope detachment prevention device according to claim 1, wherein two or more of each of the detectors is installed for each groove portion of the rope guard body.

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