JP2011105461A - Braking device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a breaking device of an elevator using a rope as a body to be braked and improving breaking performance. <P>SOLUTION: The breaking device of an elevator includes: braking elements 17a arranged in a pair, having two slopes with a V-shaped side shape on the opposite surface of the braking surface, and moving downward when a car 4 moves downward and moving upward when the car 4 moves upward by friction generated when pressed against a rope 3; an operation body 17c arranged on the opposite surface of the braking surface of the braking element 17a and displacing the breaking elements 17a toward the rope 3 when the power supply to an actuator 16 is interrupted; and a slope body 17e for breaking having two slopes 17e1, 17e2 substantially parallel to the slopes of the breaking elements 17a and applied with pressing force toward the rope 3 by an elastic body 13 for breaking. The wedge effect, namely the breaking performance is improved by performing breaking operation by sandwiching the rope 3 between the pair of the breaking elements 17a. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a braking device for an elevator, and relates to a braking device using an elevator actuator that brakes the lifting body when the lifting speed exceeds a specified value or when the lifting body travels in an abnormal state. is there.

  As an actuator that uses an actuator to brake the lifting body, the actuator has an operating force that resists the elastic force, the power is shut off under a predetermined condition, and the actuator is slid onto the braked body by the elastic force according to the power cutoff of the actuator. Some have a brake that contacts and decelerates and stops the lifting body. And it is mentioned that the device using such an actuator is applied as one that brakes the lifting body when the lifting speed exceeds a predetermined value or when the lifting body travels in an abnormal state.

  As this type, conventionally, the braked body is a rope connected to the lifting body, and the braking surface located at one end of the rope row and facing the rope, and the braking surface across the rope row, A main body in which two inclined surfaces are formed so as to form a V-shaped side surface, and two inclined surfaces that are substantially parallel to the two inclined surfaces of the main body are formed. A first brake element that moves upward when moving downward, a second brake element that moves downward when moving upward, a second brake element disposed between adjacent ropes inside the main body, and a connecting rod when the actuator is powered off There has been proposed one provided with an actuating elastic body for moving the first brake element in the direction of the braking position and a braking elastic body for obtaining an appropriate braking force by applying a pressing force to the brake element slidably contacting the rope. (For example, patent literature Reference).

WO 2004/085303 (page 5-6, FIG. 7)

  However, the above-described conventional structure has a structure in which a wedge that is pressed against a rope that is a braked body, that is, a brake element, is arranged only on one side with respect to the rope during braking. In order to obtain the braking force required for emergency stop of the body, that is, the wedge effect, it is necessary to set the movement dimension of the braking element at the time of braking relatively large, and there is a problem that the size of the device increases accordingly. there were.

  The present invention has been made from the above-described prior art, and an object of the present invention is to use a rope as a body to be braked, and an elevator braking device that can reduce the size of the device by improving the braking performance. Is to provide.

  In order to achieve the above object, the present invention provides an elevator braking apparatus that is provided in a lifting body that is suspended by a rope and moves up and down in a hoistway, and brakes the lifting body using the rope as a braked body. In addition, two anti-braking surfaces are formed on the anti-braking surface, and two slopes forming a V-shaped side surface are formed. The frictional force when pressed against the rope moves downward when the lifting body moves downward. A braking element that moves upward when moving upward, an operating body that is disposed on an anti-braking surface of the braking element, and that displaces the braking element in the rope direction when the power of an actuator is shut off, and a slope of each of the braking elements Two slopes which are substantially parallel to each other are formed, and a braking slope body to which a pressing force is applied in the rope direction by the braking elastic body is provided.

  In the present invention configured as described above, the brake is held away from the rope during normal operation. When the actuator power is cut off in response to an abnormality, the operating body moves in the direction of the rope so that the pair of brakes are pressed against each other while holding the rope, and the friction force at this time causes the reaction to occur. The brake element in which two inclined surfaces are formed so as to form a V-shaped side surface on the braking surface moves downward along the operating body and the braking inclined body, and moves upward when moving up and down. Moving. In this state, the braking element is pressed against the rope with an appropriate pressing force by the elastic force of the braking elastic body through the braking slope body to obtain a braking force. In this way, by braking by sandwiching the rope with the pair of brake elements, a double wedge effect can be obtained compared to the conventional one in which the brake element is arranged only on one side of the rope. Since the braked body is a rope, the braking performance can be improved.

Further, the present invention is arranged in pairs so as to face each other, and a braking arm that is rotatably provided with a shaft as a fulcrum, and a pair that is inside the braking arm and faces each other. And an actuating arm that is rotatably provided with a shaft as a fulcrum, and the braking elastic body is installed between the braking arms, and the actuator, And an actuating elastic body that rotates the actuating arm in response to power interruption of the actuator, and the brake arm, the actuating body, and the end of the actuating arm It is characterized by supporting a slope for operation.

  In the present invention configured as described above, when the power supply of the actuator is cut off in response to an abnormality, the operating arm is rotated by the elastic force of the operating elastic body, and the operating body moves in the rope direction. The brake element in which two slopes are formed so as to form a V-shaped side face on the anti-brake surface by the friction force at this time is pressed between the operating body and the brake. Along the slope body, it moves downward when the lifting body moves downward, and moves upward when it moves upward. In this state, the brake element is pressed against the rope with an appropriate pressing force by the elastic force of the braking elastic body interposed between the braking arms via the braking slope body to obtain the braking force. As described above, the brake arm and the actuating arm are provided so as to be opposed to each other and rotatably provided with the shaft as a fulcrum, and the brake elastic body is installed between the brake arms. In addition, an actuator and an elastic body for operation are installed between the operating arms, and the brake element, the operating body, and the operating slope body are supported by the ends of the braking arm and the operating arm. The braking element arranged in pairs with one braking elastic body, one actuation elastic body, and one actuator can be braked, and the braking elastic body and the actuation elastic body are made independent, It is possible to reduce the elastic force of the operating elastic body.

  According to the present invention, braking is performed by holding a rope with a pair of braking elements, thereby improving the wedge effect, i.e., the braking performance, thereby reducing the movement dimension of the braking element during braking. Therefore, the apparatus can be reduced in size.

It is a schematic block diagram of the elevator which shows the position where the braking device of this invention is installed. It is a principal part schematic front view of the braking device in a present Example. It is a principal part schematic top view which shows one Example of the braking device of the elevator by this invention. It is a principal part schematic front view which shows a state when a brake element is made to contact a rope. It is a principal part schematic top view which shows a state when a brake element is made to contact a rope. It is a principal part schematic front view which shows the state which the brake element moved below at the time of abnormally descending movement. It is a principal part schematic top view which shows a state when pressing a brake element on a rope at the time of abnormal movement. It is a principal part schematic front view which shows the state which the brake element moved upwards at the time of an abnormal raise movement.

  Embodiments of an elevator braking device according to the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, the elevator has a rope 3 wound around a sheave 2 of a hoisting machine provided in the machine room 1, and a counterweight 4 and a counterweight 5 are respectively connected to both ends of the rope 3. ing. The car 4 is guided in the hoistway 6 by a car-side guide rail 7, and the counterweight 5 is guided by a counterweight-side guide rail 8, and the sheave 2 of the hoisting machine is rotated. The car 4 and the counterweight 5 move up and down in the hoistway 6. The braking device 10 of this embodiment is installed on the machine base 9 so as to face the track of the rope 3.

  As shown in FIGS. 2 and 3, the braking device 10 of the present embodiment is arranged in pairs so as to face each other, and is provided with a braking arm 12 that is rotatably provided with a shaft 11 as a fulcrum. The brake elastic body 13 installed between the brake arms 12 and the brake elastic body 13 are arranged in pairs so as to be opposed to each other inside the brake arm 12 and rotatably provided with the shaft 11 as a fulcrum. The actuating arm 14, the actuating elastic body 15 and the actuator 16 installed between the actuating arms 14, and the braking arm 17 and the braking part 17 supported by the respective ends of the actuating arm 14. I have.

  The braking parts 17 are provided in pairs and move downward when the car 4 is moved downward, and move upward when the car 4 is moved upward due to frictional force when pressed against the rope 3. A brake element 17a formed with two inclined surfaces 17a1 and 17a2 having a V-shaped side surface, and an end of the operating arm 14 are rotatably supported around a shaft 17b, and each of the inclined surfaces of the brake element 17a Two inclined surfaces 17c1 and 17c2 that are substantially parallel to 17a1 and 17a2 are formed, and an actuating body 17c that displaces the brake 17a in the direction of the rope 3 and a shaft 17d as a fulcrum are rotatably supported at the end of the brake arm 12. In addition, the brake element 17a and the actuating body 17c have a substantially U-shaped cross section, and the brake element 17a has a V-shaped side surface. Two slopes 17e1,17e2 becomes and a braking slope member 17e respectively formed shaped open end of the U serving as Re slope 17a1,17a2 substantially parallel to each.

  In this embodiment, during normal operation, the actuator 16 is energized, and as shown in FIGS. 2 and 3, overcomes the elastic force of the operating elastic body 15 and holds the brake 17a away from the rope 3. is doing. At this time, as shown in FIG. 2, the brake element 17a is in a state where the inclined surfaces 17a1 and 17a2 are in contact with the inclined surfaces 17c1 and 17c2 of the operating body 17c, and the upper surface and a part of the lower surface thereof are U-shaped. It is held at a predetermined position by being hooked on the inner wall of the braking slope body 17e having the cross-sectional shape. For example, when a speed detector (not shown) senses an abnormal downward movement of the car 4, an electrical signal is input from the speed detector to the braking device 10, and the braking device 10 shuts off the power supply to the actuator 16. When the power of the actuator 16 is shut off, as shown in FIGS. 4 and 5, the operating arm 14 is rotated about the shaft 11 by the elastic force of the operating elastic body 15 installed between the operating arms 14, The actuating body 17c supported by the end of the actuating arm 14 moves in the direction of the rope 3 and the brake 17a is pressed against the rope 3. Then, when the car 4 is lowered while being pressed against the rope 3, the brake 17a is caused by frictional force along the slope 17c1 of the operating body 17c as shown in FIG. It moves downward along the slope 17e1 of 17e. In this way, when the brake element 17a enters between the slope 3 and the slope 17c1 of the operating body 17c and the slope 17e1 of the brake slope body 17e, the brake arm 12 supports the shaft 11 as shown in FIG. And the braking element 17a is pressed against the rope 3 by an appropriate pressing force by the elastic force of the braking elastic body 13 installed between the braking arms 12, and the car 4 is braked.

  On the other hand, when a speed detector (not shown) senses an abnormal rise in the car 4, an electrical signal is input from the speed detector to the braking device 10, and the braking device 10 shuts off the power to the actuator 16. When the power of the actuator 16 is shut off, as shown in FIGS. 4 and 5, the operating arm 14 is rotated about the shaft 11 by the elastic force of the operating elastic body 15 installed between the operating arms 14, The actuating body 17c supported by the end of the actuating arm 14 moves in the direction of the rope 3 and the brake 17a is pressed against the rope 3. Then, when the car 4 is raised while being pressed against the rope 3, the brake 17a is caused by frictional force along the slope 17c2 of the operating body 17c as shown in FIG. It moves upward along the slope 17e2 of 17e. In this way, when the brake element 17a enters between the rope 3 and the slope 17c2 of the operating body 17c and the slope 17e2 of the brake slope body 17e, the brake arm 12 supports the shaft 11 as shown in FIG. And the braking element 17a is pressed against the rope 3 by an appropriate pressing force by the elastic force of the braking elastic body 13 installed between the braking arms 12, and the car 4 is braked.

  According to the present embodiment, braking is performed by pinching the rope 3 with the pair of braking elements 17a, thereby improving the wedge effect, that is, the braking performance, and thereby the movement dimension of the braking element 17a during braking. Therefore, it is possible to reduce the size of the apparatus. In addition, a braking arm 12 and an actuation arm 14 that are arranged in pairs so as to face each other and are rotatably provided with the shaft 11 as a fulcrum are provided, and a braking elastic body 13 is provided between the braking arms 12. And the actuator 16 and the operating elastic body 15 are installed between the operating arms 14, and the brake 17a, the operating body 17c, and the operation are operated by the ends of the braking arm 12 and the operating arm 14. By supporting the braking portion 17 composed of the inclined surface body 17e, the braking element 17a arranged in pairs with one braking elastic body 13, one operating elastic body 15, and one actuator 16 is braked. The braking elastic body 13 and the operating elastic body 15 can be made independent, and the elastic force of the operating elastic body 15 can be reduced. Therefore, it is possible to further miniaturize the apparatus.

DESCRIPTION OF SYMBOLS 1 Machine room 2 Sheave 3 Rope 4 Car 5 Balance weight 6 Hoistway 7 Car side guide rail 8 Balance weight side guide rail 9 Machine base 10 Braking device 11 Axis 12 Brake arm 13 Brake elastic body 14 Actuating arm 15 Actuating elastic body 16 Actuator 17 Braking part 17a Braking element 17a1, 17a2 Slope 17b Shaft 17c Actuating body 17c1, 17c2 Slope 17d Shaft 17e Slope body for braking 17e1, 17e2 Slope

Claims (2)

In an elevator braking device that is provided on a lifting body that is suspended by a rope and moves up and down in a hoistway, and brakes the lifting body with the rope as a braked body,
It is arranged as a pair, and two slopes forming a V-shaped side surface are formed on the anti-braking surface, and it moves downward when the lifting body moves downward due to the frictional force when pressed against the rope And a braking element that moves upward during upward movement, an operating body that is disposed on the anti-braking surface of the braking element, and that displaces the braking element in the rope direction when the power of the actuator is shut off, and each slope of the braking element A braking apparatus for an elevator, comprising: two slopes which are substantially parallel to each other and a braking slope body to which a pressing force is applied in the rope direction by a braking elastic body.   The brake arms are arranged in pairs so as to be opposed to each other, and are arranged in pairs so as to be opposed to each other inside the brake arms, and are provided so as to be rotatable around the shaft. An actuating arm rotatably provided with a shaft as a fulcrum, and the braking elastic body is installed between the braking arms, and the actuator and the power supply of the actuator are shut off between the actuating arms. In response, an operating elastic body that rotates the operating arm is installed, and the brake arm, the operating body, and the operating slope body are supported by the braking arm and the end of the operating arm. The elevator braking device according to claim 1.

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