JP2005247555A - Emergency stopper of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure functionality and safety of a device, without damaging a facility by emergency stopping, by surely stopping while avoiding its sudden stopping when a riding car abnormally nose-dives. <P>SOLUTION: This emergency stopper of a rope guide type elevator has a hydraulic cylinder 22 with a spring for pushing one in the other of a pair of brake members arranged on the riding car 10 side by sandwiching emergency stopping ropes 4a and 4b by arranging the emergency stopping ropes 4a and 4b in parallel to guide ropes 3a and 3b. The emergency stopper is provided with brakes 20a and 20b for stopping the riding car 10 by nipping the emergency stopping ropes 4a and 4b, and a control part 30 having an acceleration detector 31 for operating the brakes 20a and 20b by detecting abnormal nose diving of the riding car 10; and is constituted so as to safely stop this riding car in the abnormal nose diving of the riding car 10 by cutting of lifting ropes 2a and 2b. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an emergency stop device for an elevator, and more particularly, to an emergency stop device for a rope guide type elevator that secures a track of a passenger car with a guide rope.

  In the shaft excavation equipment, a rope guide type elevator is mostly used for transporting personnel between the ground side and the shaft bottom side. This is because it is difficult to install a steel guide rail like a general elevator because the depth increases with the progress of the shaft construction, so the tip of the scaffold is suspended in the shaft. This is because it is necessary to adjust the length of the fixed guide rope in accordance with the depth with the drum on the ground side.

  By the way, in the case of an emergency in which an elevator car abnormally suddenly descends due to cutting of a lifting rope or the like in an elevator device, a wedge or the like is pushed into a guide rail or a guide rope with an emergency stop device as described in, for example, JP-A-2001-158579. The passenger car is stopped at However, in this case, there is a problem that a large impact is given to the passenger due to a sudden stop of the passenger car.

  In the rope guide type elevator as well, for example, as described in Japanese Patent Application Laid-Open No. 7-206311, an emergency stop device bites the guide rope with a wedge mechanism such as an eccentric cam to suddenly stop the passenger car. , As well as prone to danger to the occupant.

  In such an emergency stop device for an elevator, as a means for detecting an emergency, a method of detecting an abnormality in the rotational speed of the roller by generally pressing the roller against a guide rope is generally used. However, in this system, the roller is always in contact with the guide rope, and wear is likely to cause a decrease in the performance of the guide rope, or the roller may be damaged. In particular, in the case of an elevator arranged in a deep shaft, the guide rope is likely to be damaged due to its high ascending / descending speed, and an abnormal steep descent below the maximum speed of the elevator cannot be detected.

On the other hand, the device described in Japanese Patent Application Laid-Open No. 7-206311 employs a system in which a slack in the lifting rope is detected by a roller to operate a brake. For this reason, there is relatively little damage due to wear due to almost no rotation of the roller, but it is also a contact type, so the device may be damaged due to long-term vibration, etc., or the emergency stop device may malfunction due to shaking of the passenger car. There is also the worry of being.
JP 2001-158579 A Japanese Patent Laid-Open No. 7-206311

  The present invention is intended to solve the above-described problems, and an emergency stop device for a rope guide type elevator is surely stopped while avoiding the sudden stop when the passenger car is abnormally suddenly lowered. It is an object of the present invention to ensure that the functionality and safety of the apparatus can be ensured while reducing the maintenance effort so as not to cause damage to the equipment due to the stoppage.

  Accordingly, the present invention provides an emergency stop device for a rope guide type elevator that is arranged in parallel with the guide rope, and is arranged on the passenger car side so as to sandwich the emergency stop rope. A brake that has a pair of brake members and a pressing mechanism that pushes one of the brake members toward the other, holds the emergency stop rope, stops the passenger car, and activates the brake by detecting an abnormal sudden drop of the passenger car As a thing equipped with the predetermined fall detection means to make it possible to stop safely, without stopping suddenly when a passenger car is carrying out abnormal sudden drop by cutting up and down rope etc.

  Therefore, since the guide rope that stabilizes the operation track of the passenger car is not used for emergency stop, the functionality of the elevator is not impaired even if the emergency stop device is used because it is not damaged. . In addition, by using an emergency stop rope sandwiching system with a pressing mechanism, the brake can be stopped slowly while avoiding a sudden stop of the passenger car in a brake using a conventional wedge system, which increases occupant safety. It will be easy to secure.

  In addition, a spring member that urges the plunger in the pushing direction of the plunger is disposed inside the hydraulic chamber, and the hydraulic chamber is disposed at the opposite position. By raising the hydraulic pressure, the plunger is pushed back into the brake released state. A hydraulic cylinder with a spring that operates the brake by pushing the plunger with the biasing force of the spring member by lowering the hydraulic pressure. Thus, by using the urging force of the spring member for the pressing, the force for sandwiching the emergency stop rope can be made constant and the pressing becomes elastic, so that the passenger car can be stopped more smoothly.

  Furthermore, if this fall detection means is an acceleration detector that detects an abnormal sudden drop by acceleration and outputs a signal, unlike a sensor that uses a roller for detection, non-contact type emergency detection is performed. Compared to fewer malfunctions, the ropes and rollers will not be damaged and their performance will not be reduced.Furthermore, it will be possible to detect the fall early even when the normal operation is accompanied by high-speed lifting, and more It is easy to ensure the safety of the device.

  Furthermore, it is assumed that the lower end of the emergency stop rope is wound around a magazine drum with a brake fixed to the elevator lower equipment. If the brake slips and the emergency stop rope is fed out, damage to the equipment such as the rope can be effectively avoided even when the emergency stop device malfunctions.

  According to the present invention, it is possible to reliably stop the passenger car while avoiding the sudden stop when the passenger car suddenly descends, and to prevent the equipment from being damaged due to the emergency stop, thereby reducing the maintenance labor. It is possible to sufficiently secure the functionality and safety.

  The embodiment of the present invention will be described with reference to the drawings. FIGS. 1 to 4 show an elevator apparatus in which the emergency stop device of the present embodiment is arranged, and FIG. 1 is arranged near the bottom of the shaft. 1 shows a passenger car 10 that carries personnel between the scaffold and the vicinity of the shaft entrance, and emergency stop ropes 4a and 4b are arranged in addition to the guide ropes 3a and 3b, and brakes 20a and 20b are used in an emergency. This is characterized in that it is sandwiched and stopped.

  Referring to the overall schematic diagram of FIG. 4, the installation state of the elevator apparatus in which the emergency stop device according to the present embodiment is arranged in the shaft excavation facility will be described. Since the transport of personnel between the side of the scaffold 50 and the entrance side equipment 51 and the depth of the scaffold 50 changes as the excavation progresses, the steel guide rail cannot be installed. Guide ropes 3a and 3b that can be extended and shortened with the rotation of the hoisting machine 55 are arranged, and a rope guide type elevator device in which the passenger car 10 is raised and lowered by the raising and lowering ropes 2a and 2b (FIG. 4 shows a right direction). (The guide rope 3a and the lifting rope 2a are not displayed).

  1 and FIG. 2, which is a plan view of FIG. 1, guide ropes 3a and 3b are vertically arranged on the left and right sides of the passenger car 10, and the emergency stop rope 4a is parallel to the inside thereof. , 4b are arranged. The passenger car 10 is provided with an elevating rope connecting portion 15 on the upper surface of a cylindrical passenger room 11 and is suspended by elevating ropes 2a and 2b, and guides for holding guide ropes 3a and 3b on both upper and lower surfaces of the passenger room 11. Supporting arms 12 and 13 are provided in which members 14 and 14 are arranged at both ends and are fixed horizontally, and a sliding door 11a is provided in front of the passenger compartment 11. The brakes 20a and 20b are arranged symmetrically on the upper support arm 12, and their action portions protrude outward from the outer peripheral surface of the passenger compartment 11, and the emergency stop ropes 4a and 4b penetrate therethrough, respectively.

  FIG. 3 is an enlarged cross-sectional view of the brake 20a of FIG. The base 21 is fixed on a support arm 12 (not shown) with a bolt or the like, and a hydraulic cylinder 22 with a spring, which is a pressing mechanism, is inserted and fixed at the tip side thereof, and has plate-like brake members 23a and 23b inside. The part 23 is supported. Since the brake 20b is the same, its description is omitted.

  In the spring-loaded hydraulic cylinder 22, the plunger 22b is urged in the pushing direction by the spring member 22a, and the movable brake member 23a is pushed toward the fixed brake member 23b via the push rod 22c. The emergency stop rope 4a is sandwiched between grooves 23c and 23d provided in the longitudinal direction on the inner facing surfaces of the brake members 23a and 23b, respectively.

  A hydraulic chamber 22d is provided on the distal end side of the plunger 22b, and a hydraulic pressure inlet 22e is opened in the hydraulic chamber 22d. From the hydraulic unit 16 (see FIG. 2) disposed on the upper surface of the passenger chamber 11, a pipe (not shown) In the normal state, the plunger 22b is pushed back with a hydraulic pressure exceeding the urging force of the spring member 22a, and the pressure of the hydraulic chamber 22d is reduced in an emergency, so that the spring member 22a becomes the plunger 22b. Is to be pushed in.

  Referring to FIG. 2, a control unit 30 including an ICU and a ROM is arranged on the upper surface of the passenger compartment 11 and performs various controls. An acceleration detector 31 is arranged in the control unit 30. The brakes 20a and 20b are actuated by detecting an abnormal sudden descent state due to cutting of the lifting rope or the like. The accumulator 17 that maintains the hydraulic pressure of the hydraulic unit 16 described above and the battery 18 that secures the electrical system of the passenger car 10 during a power failure are provided, and these are controlled by the control unit 30. In addition, illustration is abbreviate | omitted about each wiring and piping. The acceleration detector 31 may be a general one using a piezoelectric element or the like, and the type thereof is not limited as long as it detects a sudden drop state and generates a signal.

  Referring to FIG. 1, the guide ropes 3a and 3b have their lower ends fixed to the upper surface of the scaffold 50 with locking members 55 and 55, whereas the emergency stop ropes 4a and 4b have lower ends. The part is wound around magazine drums 19 and 19 with brakes fixed to the upper surface of the scaffold 50. Thus, for example, when the emergency stop device is activated due to malfunction while the passenger car 10 is being lifted, the elevator ropes 2a and 2b and the emergency stop ropes 4a and 4b are not pulled and the device is not damaged. The brakes of the drums 19 and 19 slip and the emergency stop ropes 4a and 4b are sent out.

  The operation of the emergency stop device according to the present embodiment will be described below. Since the brake 20a and the brake 20b perform the same operation, only the brake 20a will be described. Referring to FIGS. 2 and 3, in a normal state, the brakes 20a and 20b introduce hydraulic pressure from the hydraulic unit 16, and the plunger 22b is pushed back in the direction of contracting the spring member 22a and the hydraulic chamber 22d is expanded. There is a slight gap between the grooves 23c and 23d on the inner facing surfaces of the brake members 23a and 23b and the outer surface of the emergency stop rope 4a.

  When the elevator ropes 2a and 2b are cut and the passenger car 10 is suddenly lowered, the control unit 30 detects the sudden drop state by a signal from the acceleration detector 31, and instructs the hydraulic unit 16 to transmit the hydraulic pressure of the hydraulic cylinder 22 with the spring. The pressure in the chamber 22d is reduced. As a result, the urging force of the spring member 22a becomes dominant, the plunger 22b is pushed, the brake member 23a is pushed toward the brake member 23b via the push rod 22c, and the emergency stop rope 4a is strongly strengthened by the grooves 23c and 23d. The same is applied to the brake 20b.

  As a result, the falling passenger car 10 is surely stopped by the braking action by the frictional force, but since the pressing of the spring member 22a is elastic, it does not cause a sudden lock state, so it works extremely smoothly. Can be safely stopped without impacting personnel. In addition, since the guide rope is not used for emergency stop, the function of the elevator apparatus is not impaired, and maintenance work such as repair is not generated. Further, by using a non-contact type acceleration detector as the fall detection means, it is possible to detect an abnormal sudden drop below the maximum speed of the passenger car while avoiding damage due to wear of the apparatus.

The front view which shows embodiment of this invention. The top view of the passenger car of FIG. FIG. 3 is an enlarged cross-sectional view of the brake portion of FIG. 2. Schematic which shows the arrangement | positioning location of embodiment of FIG.

Explanation of symbols

2a, 2b Lift rope, 3a, 3b Guide rope, 4a, 4b Emergency stop rope, 10 Passenger car, 11 Passenger room, 11a Slide door, 12, 13 Support arm, 14 Guide member, 15 Lift rope connection, 16 Hydraulic pressure Unit, 17 Accumulator, 18 Accumulator, 19 Magazine drum, 20a, 20b Brake, 21 Base, 22 Hydraulic cylinder with spring, 22a Spring member, 22b Plunger, 22c Push rod, 22d Hydraulic chamber, 23 Working part, 23a, 23b Brake Member, 23c, 23d groove, 30 control unit, 31 acceleration detector, 50 scaffold, 51 inlet side equipment, 55 hoisting machine

Claims (4)

In the emergency stop device for rope guide type elevators,
One of the pair of brake members and the pair of brake members disposed on the passenger car side with the emergency stop rope disposed in parallel with the guide rope and the pair of brake members disposed on the other side A brake that has a pressing mechanism that pushes it inward and sandwiches the emergency stop rope between the pair of brake members to stop the passenger car, and a predetermined fall detection that detects an abnormal sudden drop of the passenger car and activates the brake Means and
An emergency stop device for an elevator.   In the brake pressing mechanism, a spring member for urging the plunger in the pushing direction is disposed inside, and a hydraulic chamber is disposed at an opposing position thereof, and the plunger is pushed back by raising the pressure of the hydraulic chamber. The emergency stop device for an elevator according to claim 1, which is a spring-loaded hydraulic cylinder that activates the brake by pushing the plunger with the urging force of the spring member by releasing the brake and reducing the pressure.   The elevator emergency stop device according to claim 1 or 2, wherein the fall detection means includes an acceleration detector that detects an abnormal sudden drop by acceleration and outputs a signal. The emergency stop rope is wound around a magazine drum with a brake whose lower end is fixed to the equipment on the bottom side of the elevator, and the brake is attached when the brake arranged in the passenger car is actuated when hoisting the hoisting rope. The emergency stop device for an elevator according to claim 1, 2 or 3, wherein the brake for the magazine drum is released to feed out the emergency stop rope.

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