WO2007077828A1

WO2007077828A1 - Elevator

Info

Publication number: WO2007077828A1
Application number: PCT/JP2006/325918
Authority: WO
Inventors: Masaaki Hirai; Yoshiaki Fujita; Shin Murakami; Hiroyuki Kimura; Yoshihiko Nakada; Kosei Kamimura; Masaki Sakurai
Original assignee: Toshiba Elevator Kabushiki Kaisha
Priority date: 2005-12-27
Filing date: 2006-12-26
Publication date: 2007-07-12
Also published as: CN101326118A; JP2007176624A

Abstract

An elevator having a positionally fixed governor pulley (12), a looped governor rope (13) passed over the governor pulley (12), a tension pulley (14) adapted to be vertically movable and applying tension by its weight to the governor rope (13), and a level detection section (20) for detecting the height of the tension pulley (14). An abnormality detection section (21) detects an abnormality of the governor rope (13) when the height of the tension pulley (14) detected by the level detection section (20) is separated a distance equal to or greater than a previously set value.

Description

Specification

Elebe ¹ to Ta

Technical field

[0001] The present invention provides an elevator that can automatically detect an abnormal state of a governor rope even when the governor rope is caught or entangled with equipment or walls in a hoistway due to a large earthquake or the like. About.

Background art

Conventionally, it is known to use a governor (governor) that detects an abnormal descending speed of an elevator car and emergency stops the passenger car (for example, for the safety of passengers). JP 2005-200162 A).

[0003] Fig. 10 shows the structure of a general elevator governor. As shown in Fig. 10, a general elevator has a car 11 and a counterweight (not shown) suspended in a hanging manner by a main rope wound around a lifting machine (not shown). I have. The car 11 and the counterweight are movable in the vertical direction in the hoistway 1. In addition, a governor pulley (governor pulley) 12 is installed at a fixed position near the ceiling of the hoistway 1, and a loop governor rope 13 is wound around the governor pulley 12. Furthermore, a tension pulley 14 that can move in the vertical direction is wrapped around the lower end of the loop-shaped governor rope 13. The tension pulley 14 has a weight 14a, and tension is applied to the governor rope 13 by the weight of the weight 14a. As shown in FIG. 10, the governor rope 13 is provided with rope crimps 15 at both ends, and the governor rope 13 has a loop shape by connecting a pair of rope crimps 15. This rope caulking 15 and the force frame 1 la of the riding force 11 are connected by the connecting arm 16!

FIG. 11 is a longitudinal sectional view showing details of the configuration of the devices around the governor pulley 12.

As shown in FIG. 11, two weights 25 are arranged on the governor pulley 12, and these weights 25 are fixed on the governor pulley 12 by a link mechanism (not shown). . In addition, the governor pulley 12 is provided with a holding panel 26 that suppresses the force by which the weight 25 moves in the circumferential direction of the disk by centrifugal force. If the traveling speed of the car 11 exceeds the set value for some reason, the rotational speed of the governor pulley 12 increases accordingly. As a result, the centrifugal force acting on the weight 25 also exceeds the predetermined value, so that the weight 25 protrudes beyond the outer periphery of the governor pulley 12 by overcoming the holding force of the holding panel 26. Strike the cam 2 8 that supports the rope grip 27. As a result, the cam 28 rotates, the hook 29 is released, the rope grip 27 is lowered, and the governor rope 13 is gripped instantaneously.

FIG. 12 is an explanatory perspective view showing a general configuration of the safety device l ib arranged in the car frame 11 a of the car 11. When the governor rope 13 is gripped by the rope grip 27 as described above, the emergency stop device l ib fixed to the car frame 11a of the car 11 continues to descend together with the car 11. As shown in FIG. 10, a pair of emergency stop shelves 1 lc located inside the emergency stop device l ib and provided with the guide rails l id of the car 11 between them, as shown in FIG. Since it is directly connected to 13, the emergency stop shoe 11c also stops when the governor rope 13 stops. For this reason, the emergency stop shoe 11c moves upward relative to the emergency stop device l ib, and as a result, the emergency stop shoe 11c is narrowed along the wedge-shaped track so that the distance between the left and right sides is reduced. It is a mechanism that makes the car 11 emergency stop by applying a sudden braking to the car 11! /

[0006] By the way, if the building shakes greatly, such as in the event of a large earthquake, the governor rope 13 may also swing greatly, and it may be caught or tangled with peripheral equipment or walls in the hoistway 1 . In order to prevent the governor rope 13 from wobbling in the event of an earthquake or the like, for example, a method using a governor rope steady-state device as disclosed in JP-A-10-36038 is known.

[0007] Even when a governor rope steady rest device such as that disclosed in Japanese Patent Application Laid-Open No. 10-36038 is used, the governor rope is connected to peripheral devices or walls in the hoistway when an earthquake occurs. There is a possibility of being caught or tangled. In that case, if the car continues to run as it is, the governor rope may eventually be cut off, or the governor rope may not run with the car and the above safety may be activated. Problems such as inducing a confinement accident and requiring a very long time to restore the elevator occur. Here, for example, when the seismic intensity of the earthquake is smaller than the set value, the elevator is automatically restored. When the seismic vibration of the earthquake is larger than the set value, the hooks of various ropes are used. First, the car is automatically evacuated to the nearest floor of the building, and maintenance personnel inspect it without automatically recovering from it. The elevator does not automatically return until the maintenance staff manually restarts the elevator.

[0009] However, according to the above procedure, the car continues to travel until the car reaches the nearest floor at the time of the earthquake, and the governor rope may be cut during that time. In the case of an earthquake with a large seismic intensity that does not automatically restore the elevator, maintenance work is required to be manually performed by maintenance personnel. However, if a large number of elevators stop in an emergency due to the occurrence of a large earthquake, the maintenance personnel There is a problem that it takes a very long time to recover due to a shortage of the number of computers.

Disclosure of the invention

[0010] The present invention has been made in consideration of such points, and is a case where the governor loop is caught or entangled with equipment or walls in the hoistway due to a large earthquake or the like. However, an object of the present invention is to provide an elevator that can automatically detect an abnormal state of the governor rope.

Another object of the present invention is to ensure the safety of passengers in the car and to cut the governor rope even when the lifting machine itself is stopped due to a large earthquake or the like. In addition, the time required for restoration of the elevator can be shortened.

[0011] The present invention relates to a car that is movable in the vertical direction, a speed governor pulley that is fixed in position, and a loop shape that is wound around the speed governor pulley and that is partially attached to the car. A governor rope, a tension pulley around which the governor rope is wound and movable in the vertical direction, tensioning the governor rope by its own weight, a level detection unit for detecting the height level of the tension pulley, and the level An abnormal state detection unit that detects an abnormal state of the governor rope when the height level of the tension pulley detected by the detection unit is more than a preset value with respect to a preset height level. It is an elevator characterized by

According to such an elevator, even if the governor rope is hooked or entangled with equipment or walls in the hoistway due to a large earthquake or the like, the height level of the tension pulley caused by this will be reduced. When the level detector measures the rise, the abnormal condition detector can automatically detect the abnormal condition of the governor rope.

[0012] In such an elevator, when the car is in an emergency stop, the elevator further includes an operation control unit that moves the car again, and when the operation control unit moves the car again, When the abnormal state detection unit detects an abnormal state of the governor rope, the operation control unit preferably stops the movement of the car and maintains this stopped state.

According to such an elevator, even if the hoist itself stops due to a large earthquake or the like, the operation control unit automatically detects the presence or absence of an abnormal state of the governor rope when moving the car again. If the governor rope is in an abnormal state, it is possible to ensure the safety of passengers in the car and stop the governor rope by stopping the movement of the car and maintaining this stop state. Can be prevented. On the other hand, when the governor rope is not in an abnormal state, the operation control unit can automatically resume the movement of the car, thereby shortening the time required to restore the elevator.

[0013] In such an elevator, it is preferable that the level detection unit also has a contact-type or non-contact-type displacement gauge force installed in the vicinity of the tension pulley.

Alternatively, the level detection unit is preferably a limit switch force installed in the vicinity of the tension pulley! /.

Alternatively, it is preferable that the level detection unit also has an electric resistance displacement gauge installed in the vicinity of the tension pulley.

[0014] The present invention relates to a car that is movable in the vertical direction, a governor pulley that is fixed in position, and a loop that is wound around the governor pulley and is partially attached to the car. A governor rope, a tension pulley around which the governor rope is wound and movable in a vertical direction, and tensioning the governor rope by its own weight, and the governor port A tension detection unit that detects the tension of the loop, and an abnormality that detects an abnormal state of the governor rope when the tension of the governor rope detected by the tension detection unit is more than a preset value with respect to a preset tension. And a state detection unit.

According to such an elevator, even if the governor rope is caught or entangled with equipment or walls in the hoistway due to a large earthquake, etc., the tension of the governor rope is increased due to this. By measuring the tension detection unit, the abnormal state detection unit can automatically detect the abnormal state of the governor rope.

[0015] In such an elevator, when the car is in an emergency stop, the elevator further includes an operation control unit that moves the car again. When the operation control unit moves the car again, When the abnormal state detection unit detects an abnormal state of the governor rope, the operation control unit preferably stops the movement of the car and maintains this stopped state.

According to such an elevator, even if the hoist itself stops due to a large earthquake or the like, the operation control unit automatically detects the presence or absence of an abnormal state of the governor rope when moving the car again. If the governor rope is in an abnormal state, it is possible to ensure the safety of passengers in the car and stop the governor rope by stopping the movement of the car and maintaining this stop state. Can be prevented. On the other hand, when the governor rope is not in an abnormal state, the operation control unit can automatically resume the movement of the car, and the time required for the restoration of the elevator can be shortened.

[0016] In such an elevator, it is preferable that the tension detecting unit also has a load measuring force for measuring the tension of the governor rope attached in the vicinity of the portion of the governor rope to which the car is attached. .

Brief Description of Drawings

FIG. 1 is a schematic configuration diagram showing an overall configuration of an elevator according to a first embodiment.

[Fig. 2] A flow chart showing operation control in the event of an earthquake in the elevator of Fig. 1. [FIG. 3] (a) and (b) are views showing a state in which the governor rope is caught or entangled in the elevator of FIG.

FIG. 4 is a schematic configuration diagram showing another configuration of the elevator according to the first embodiment.

FIG. 5 is a schematic configuration diagram showing still another configuration of the elevator according to the first embodiment.

FIG. 6 is a schematic configuration diagram showing still another configuration of the elevator according to the first embodiment.

FIG. 7 is a schematic configuration diagram showing an overall configuration of an elevator according to a second embodiment.

8 is an explanatory diagram showing details of a tension detection unit in the elevator of FIG.

[FIG. 9] (a) and (b) are views showing a state in which the governor rope is caught or entangled in the elevator of FIG.

FIG. 10 is a schematic explanatory view showing the structure of a general elevator governor.

FIG. 11 is a longitudinal sectional view showing details of the configuration of the equipment around the governor pulley of the elevator shown in FIG.

FIG. 12 is an explanatory perspective view showing a general configuration of the elevator safety device shown in FIG.

BEST MODE FOR CARRYING OUT THE INVENTION

[0018] First embodiment

The first embodiment of the present invention will be described below with reference to the drawings. 1 to 3 are views showing a first embodiment of an elevator according to the present invention.

Among these, FIG. 1 is a schematic configuration diagram showing the overall configuration of the elevator of the present embodiment, and FIG. 2 is a flow chart showing operation control when an earthquake or the like occurs in the elevator of FIG. 3 (a) and (b) are views showing a state in which the governor rope is caught or entangled in the elevator of FIG.

As shown in FIG. 1, the elevator according to the present embodiment includes a car 11 and a counterweight (which are suspended in a hanging manner by a main rope wound around a lifting machine (not shown)). (Not shown). The car 11 and the balance are freely movable in the vertical direction in the hoistway 1, while the lifting machine is disposed in a machine room (not shown) provided above the hoistway 1. Has been.

On the other hand, as shown in Fig. 1, there is a governor pulley (governor pulley) near the ceiling of hoistway 1. Is installed at a fixed position, and a loop governor rope 13 is wound around the governor pulley 12. Further, the loop-shaped governor rope 13 is wound around a tension pulley 14 that is movable in the vertical direction. The tension pulley 14 has a weight 14a, and tension is applied to the governor rope 13 by the weight of the weight 14a. As shown in FIG. 1, the governor rope 13 is provided with rope caulking 15 at both ends, and by connecting a pair of rope caulking 15, the governor rope 13 becomes a loop! The rope caulking 15 and the car frame 1 la of the car 11 are connected by a connecting arm 16.

[0020] On the other hand, below the tension pulley 14, a level detection unit 20 for detecting the height level of the tension pulley 14 is provided at a fixed position. Specifically, the level detection unit 20 includes a non-contact type laser displacement meter 20a, and the laser displacement meter 20a is disposed below the tension pulley 14 with a slight separation. The laser displacement meter 20a detects the height level of the tension pulley 14 by detecting the distance A from the tension pulley 14 to the weight 14a.

As shown in FIG. 1, an abnormal state detection unit 21 is electrically connected to the level detection unit 20. The abnormal state detection unit 21 is for detecting an abnormal state of the governor rope 13. Specifically, the abnormal state detection unit 21 detects the height level force of the tension pulley 14 detected by the laser displacement meter 20a of the level detection unit 20 described above with respect to the height level set in advance by maintenance personnel. When the distance exceeds the set value, the abnormal state of the governor rope 13 is detected. On the other hand, when the deviation of the height level of the tension pulley 14 from the set height level is within the set value range, the abnormal state detection unit 21 generates an abnormal state in the governor rope 13. Judge.

On the other hand, an operation control unit 30 is electrically connected to the hoisting machine that raises and lowers the car 11. The operation control unit 30 has a function of controlling the operation of the lifting machine. This operation control unit 30 is also electrically connected to the abnormal state detection unit 21, and when the abnormal state detection unit 21 detects an abnormal state of the governor rope 13, a detection signal is sent from the abnormal state detection unit 21 to control the operation. It will be sent to Part 30.

[0023] The operation control unit 30 is used when the car 11 itself is brought to an emergency stop due to a large earthquake or the like. The car 11 is moved at a low speed to the level related to the nearest floor of the building. Here, when the abnormal state of the governor rope 13 is detected by the abnormal state detection unit 21 while the operation control unit 30 is moving the car 11 again at a low speed, the operation control unit 30 By stopping the drive, the movement of the car 11 is stopped to maintain this stop!

Next, the operation of the present embodiment having such a configuration force will be described with reference to the flowchart of FIG.

First of all, for normal operation! The hoisting machine raises or lowers the main rope on the car 11 side, so that the car 11 moves up and down in the hoistway 1. In conjunction with the raising and lowering of the car 11, the counterweight moves up and down in the hoistway 1 while balancing with the car 11. Here, when the car 11 moves up and down, the loop-shaped governor rope 13 connected to the power car 11 via the connecting arm 16 also circulates simultaneously, and the governor pulley 12 rotates.

If the elevator 11 has trouble such as the main rope breaking, and the car 11 suddenly falls, the speed of the governor pulley 12 increases significantly above the specified value. Based on the increase in the rotational speed of the pulley 12, emergency stop means such as those shown in FIGS. 11 and 12 cause the car 11 to come to an emergency stop! /.

The laser displacement meter 20a of the level detection unit 20 constantly measures the height level of the tension pulley 14 hung on the governor rope 13. At this time, the height level of the tension pulley 14 hardly changes during normal operation of the elevator.

[0025] Here, as shown in STEP 1 of FIG. 2, when a large earthquake or the like occurs, the lifting machine temporarily stops and the car 11 also stops. Then, after the emergency stop of the car 11, as shown in STEP 2, the operation control unit 30 moves the car 11 at the inspection speed (low speed) and causes the car 11 to reach the nearest floor of the building. In this way, the car 11 can be evacuated urgently so that passengers in the car 11 can escape to the floor on the nearest floor of the building by opening the door (not shown) of the car 11 .

[0026] While the operation control unit 30 moves the car 11 at the inspection speed (low speed), the laser displacement meter 20a of the level detection unit 20 is the height of the tension pulley 14 hung on the governor rope 13. The level is constantly measured (STEP 3). Here, as shown in Fig. 3 (a), if the governor rope 13 is caught or entangled with equipment or walls in the hoistway 1 at the position P due to the influence of an earthquake or the like, the car 11 When the movement according to STEP 2 is further performed, the governor rope 13 does not circulate between the governor pulley 12 and the tension pulley 14.As shown in Fig. 3 (b), part of the governor rope 13 is loosened and the car 11 In accordance with the movement, the tension pulley 14 is also moved upward. In this case, the height level of the tension pulley 14 measured by the laser displacement meter 20a is higher than normal, and this height level is far from the preset normal level by more than the set value. If this occurs (STEP 4), the abnormal state detector 21 detects the abnormal state of the governor rope 13 (STEP 5).

When an abnormal state of the governor rope 13 is detected, a detection signal is sent from the abnormal state detection unit 21 to the operation control unit 30. When the operation control unit 30 receives this detection signal, the operation control unit 30 determines that the elevator is in a failure state as shown in STE P6, and stops the elevator 11 to move the car 11. Stop and maintain this stopped state.

[0027] On the other hand, if the abnormal state of the governor rope 13 is not detected by the abnormal state detection unit 21 while the operation control unit 30 moves the car 11 at the inspection speed (low speed) as shown in STEP 2, the operation is performed. The control unit 30 moves the car 11 to the nearest floor of the building (STEP 7). When the car 11 reaches the nearest floor of the building, the operation control unit 30 stops the car 11 once and again as shown in STEP 8.

Thereafter, the operation control unit 30 automatically resumes the operation of the lifting machine (STEP 9). In this way, the elevator is automatically restored.

[0028] As described above, according to the elevator of the present embodiment, the level detector 20 that detects the height level of the tension pulley 14 and the tension pulley 14 detected by the level detector 20 An abnormal state detection unit 21 is provided for detecting an abnormal state of the governor rope 13 when the height level is far from the preset height level by a set value or more. As a result, even if the governor rope 13 is caught or entangled with equipment or walls in the hoistway 1 due to a large earthquake, the tension pulley 14 When the level detector 20 measures an increase in the height level of the sensor, the abnormal state detector 21 can automatically detect the abnormal state of the governor rope 13.

[0029] In addition, when the car 11 is brought to an emergency stop, an operation control unit 30 is provided for moving the car 11 again. When the operation control unit 30 moves the car 11 again, When an abnormal state of the governor rope 13 is detected by the abnormal state detection unit 21, the operation control unit 30 stops the movement of the car 11 and maintains this stopped state. This enables automatic detection of the presence or absence of an abnormal state of the governor rope 13 when the elevator 11 is moved again by the operation control unit 30 even in the case of emergency stop due to a large earthquake. If the governor rope 13 is in an abnormal state, it is possible to ensure the safety of passengers in the car 11 by stopping the movement of the car 11 and maintaining this stopped state. It can be prevented from being cut. On the other hand, when the governor rope 13 is not in an abnormal state, the operation control unit 30 can automatically resume the movement of the car 11, and the time required for restoration of the elevator can be shortened.

[0030] The elevator according to the present invention can make various changes not limited to the above-described embodiment.

Next, a modification of the elevator according to the present invention will be described with reference to FIG. In FIG. 4, the same parts as those in the embodiment shown in FIGS. 1 to 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

The elevator according to this modification is different in that a contact displacement meter 20b is used instead of the non-contact laser displacement meter 20a as the level detection unit 20 that detects the height level of the tension pulley 14. The rest is substantially the same as the embodiment shown in FIGS.

Specifically, the contact displacement meter 20b is connected to the bottom surface of the weight 14a of the tension pulley 14, and when the weight 14a moves upward, the height of the tension pulley 14 is determined based on the moving distance. I started to measure the level.

Generally, the contact displacement meter 20b is less expensive than the non-contact laser displacement meter 20a, so that the manufacturing cost of the entire elevator can be reduced. Another modification of the elevator according to the present invention will be described with reference to FIG. In FIG. 5, the same parts as those of the embodiment shown in FIGS. 1 to 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

The elevator according to this modification is different from the elevator of the present embodiment only in that a limit switch 20c is used instead of the non-contact type laser displacement meter 20a as the level detection unit 20 for detecting the height level of the tension pulley 14. This is substantially the same as the embodiment shown in FIGS.

Specifically, the limit switch 20c is disposed above the weight 14a of the tension pulley 14 so as to be spaced apart. When the weight 14a moves upward and contacts the limit switch 20c, the limit switch 20c is switched on / off! /. As a result, it is detected that the height level of the tension pulley 14 is more than the set value with respect to the preset set height level.

In the modified example shown in FIG. 5, a very inexpensive limit switch 2 Oc is used as the level detecting unit 20! /, So the manufacturing cost of the entire elevator can be reduced.

Another modification of the elevator according to the present invention will be described with reference to FIG. In FIG. 6, the same parts as those in the embodiment shown in FIGS. 1 to 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

The elevator according to this modification is different in that an electric resistance displacement meter 2 Od is used instead of the non-contact type laser displacement meter 20a as the level detection unit 20 for detecting the height level of the tension pulley 14. And the others are substantially the same as those of the embodiment shown in FIGS.

Specifically, the electrical resistance displacement meter 20d is attached to a resistance plate 20e that is fixed in the vertical direction in the vicinity of the tension pulley 14, and a weight 14a of the tension pulley 14, and the resistance plate 20e. It has a slide member 20f that slides upward, and a resistance plate 20e and a voltmeter 20g that is electrically connected to the slide member 20f. Here, when the position of the tension pulley 14 is constant, the position of the slide member 20f with respect to the resistance plate 20e is also constant, so that the voltage between the resistance plate 20e and the slide member 20f measured by the voltmeter 20g The size is also constant. On the other hand, if the tension pulley 14 moves upward, the resistance Since the slide member 20f slides upward with respect to the plate 20e, the magnitude of the voltage between the resistance plate 20e and the slide member 20f measured by the voltmeter 20g changes. The abnormal state detection unit 21 detects an abnormal state of the governor loop 13 based on a change in the magnitude of the voltage measured by the voltmeter 20g.

[0036] According to the electrical resistance displacement meter 20d having the resistance plate 20e, the slide member 20f, and the voltmeter 20g, V is added to the non-contact type laser displacement meter 20a and the contact displacement meter 20b. This eliminates the need for troublesome adjustments such as zero adjustment, which is necessary.

[0037] Form of second implementation

Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. Figure 7 is a schematic diagram showing the overall configuration of the elevator of this embodiment, FIG. 8 is an explanatory view showing details of the tension detecting unit in the elevator of FIG. 7, FIG. _{9 (a) _(b)} The figure

FIG. 7 is a view showing a state in which the governor rope is hooked or entangled in the elevator of FIG.

The elevator shown in FIGS. 7 and 8 is provided with a tension detection unit 40 for detecting the tension of the governor rope 13, and the abnormal state detection unit 41 has the tension of the governor rope 13 detected by the tension detection unit 40 in advance. The only difference is that an abnormal state of this governor rope 13 is detected when the set tension is more than the set value, and the other is substantially the first one shown in FIGS. It has the same configuration as the embodiment.

In the present embodiment shown in FIG. 7 to FIG. 9, the same parts as those in the first embodiment shown in FIG. 1 to FIG.

[0039] As shown in Figs. 7 and 8, the tension detector 40 is composed of a load meter 40a attached to one rope caulking 15, and this load meter 40a is installed in the vicinity of the connection arm 16, The The load cell 40a measures the tension of the governor rope 13 constantly.

[0040] An abnormal state detection unit 41 is electrically connected to the tension detection unit 40. The abnormal state detection unit 41 is for detecting an abnormal state of the governor rope 13. Specifically, the abnormal state detection unit 41 is detected by the load meter 40a of the tension detection unit 40 described above. The tension force of the governor rope 13 that has been detected The abnormal state of the governor rope 13 is detected when the tension set in advance by the maintenance staff is more than the set value. On the other hand, if the deviation of the governor rope 13 from the tension setting tension is within the set value range, the abnormal state detection unit 41 determines that an abnormal state has occurred in the governor rope 13! / ヽ.

[0041] Next, the operation of the present embodiment having such a configuration force will be described.

First, during normal operation, when the car 11 is lifted and lowered by the lifting machine, the load meter 40a of the tension detector 40 constantly measures the tension of the governor rope 13. During operation, the tension of the governor rope 13 hardly changes.

[0042] On the other hand, when a large earthquake or the like occurs, the lifting machine temporarily stops and the car 11 also stops. Then, after the car 11 comes to an emergency stop, the operation control unit 30 moves the car 11 at the inspection speed (low speed) and evacuates the car 11 to the nearest floor of the building. Thus, the car 11 can be urgently evacuated so that passengers in the car 11 can escape to the floor on the nearest floor of the building when the door (not shown) of the car 11 is opened. it can.

[0043] While the operation control unit 30 moves the car 11 at the inspection speed (low speed), the load meter 40a of the tension detection unit 40 constantly measures the tension of the governor rope 13. Here, if the governor rope 13 is caught or entangled with equipment or walls in the hoistway 1 due to the effects of earthquakes (see Fig. 9 (a) and (b)), the car 11 When the governor rope 13 moves, the governor rope 13 does not circulate between the governor pulley 12 and the tension pulley 14, and the governor rope 13 is pulled from the portion where it is caught on the wall by the movement of the car 11. . In this case, when the tension of the governor rope 13 measured by the load meter 40a becomes larger than normal, and when this tension is more than a preset value than the preset normal tension, the abnormal condition detector 41 Abnormal state of governor rope 13 is detected.

[0044] Here, in the present embodiment, as shown in FIG. It is not limited to the case where the rope portion 13a on the side to which the connecting arm 16 is not attached is hooked to the equipment in the hoistway 1 at the position P, as shown in Fig. 9 (b). Even if the rope portion 13b below the position where the arm 16 is attached is hooked to the equipment in the ascending / descending path 1 at the position Q, the abnormal state of the governor rope 13 can be detected. There are advantages.

When an abnormal state of the governor rope 13 is detected, a detection signal is sent from the abnormal state detection unit 41 to the operation control unit 30. When the operation control unit 30 receives this detection signal, the operation control unit 30 determines that the elevator is in a failure state, and stops the movement of the car 11 by controlling the hoisting machine. The stop state is maintained.

[0046] On the other hand, if the abnormal state of the governor rope 13 is not detected by the abnormal state detection unit 41 while the operation control unit 30 moves the car 11 at the inspection speed (low speed), the operation control unit 30 will Move basket 11 to the nearest floor of the building. When the car 11 reaches the nearest floor of the building, the operation control unit 30 stops the car 11 once again.

Thereafter, the operation control unit 30 automatically resumes the operation of the lifting machine. In this way, the elevator is automatically restored.

[0047] As described above, according to the elevator of the present embodiment, the tension detector 40 that detects the tension of the governor rope 13 and the tension of the governor mouth 13 detected by the tension detector 40 are preset. An abnormal condition detection unit 41 is provided for detecting an abnormal condition of the governor rope 13 when the tension is more than the set value. As a result, even if the governor rope 13 is hooked or tangled with equipment or walls in the hoistway 1 due to a large earthquake or the like, the tension detector By measuring 40, the abnormal state detector 41 can automatically detect the abnormal state of the governor rope 13.

Claims

The scope of the claims

[1] Vertically movable carriage,

A fixed speed governor pulley;

A loop-like governor rope wound around the governor pulley and partially attached to the car;

A tension pulley around which the governor rope is wound and movable in the vertical direction, and tensions the governor rope by its own weight;

A level detector for detecting the height level of the tension pulley;

An abnormal state detection unit that detects an abnormal state of the governor rope when the height level of the tension pulley detected by the level detection unit is more than a set value with respect to a preset height level;

An elevator characterized by comprising:

[2] The vehicle further includes an operation control unit that moves the car again when the car stops in an emergency.

When the abnormal state of the governor rope is detected by the abnormal state detection unit while the operation control unit is moving the car again, the operation control unit stops the movement of the passenger car and stops the movement. 2. The elevator according to claim 1, wherein the state is maintained.

3. The elevator according to claim 1, wherein the level detection unit is a contact-type or non-contact-type displacement gauge installed in the vicinity of the tension pulley.

[4] The elevator according to claim 1, wherein the level detection unit includes a limit switch installed in the vicinity of the tension pulley.

5. The elevator according to claim 1, wherein the level detection unit is an electric resistance displacement gauge installed in the vicinity of the tension pulley.

[6] Vertically movable ride car,

A fixed speed governor pulley;

A loop-like governor rope wound around the governor pulley and partially attached to the car; A tension pulley around which the governor rope is wound and movable in the vertical direction, and tensions the governor rope by its own weight;

A tension detector for detecting the tension of the governor rope;

An abnormal state detection unit that detects an abnormal state of the governor rope when the tension of the governor rope detected by the tension detection unit is more than a preset value with respect to a preset tension;

An elevator characterized by comprising:

[7] The vehicle further includes an operation control unit that moves the car again when the car stops in an emergency.

When the abnormal state of the governor rope is detected by the abnormal state detection unit while the operation control unit is moving the car again, the operation control unit stops the movement of the passenger car and stops the movement. The elevator according to claim 6, wherein the state is maintained.

[8] The elevator according to claim 6, wherein the tension detector comprises a load cell attached in the vicinity of a portion of the governor rope to which the car is attached and measures the tension of the governor rope. .