JP2013252916A - Vibration damping device of elevator tail cord - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration damping device of an elevator tail cord capable of damping the swinging of the tail cord by a simple structure even if a car is located at a top floor.SOLUTION: A vibration damping device of an elevator tail cord is provided in which one end of the tail cord is attached to a hoistway 50 and the other end abuts on a bent part 2R formed at the vertically lowest part of the tail cord 2 when a car 1 is located at a top of the hoistway 50 and imparts tension while being composed to displace an abutting position to the tail cord 2 following the displacement of the tail cord 2.

Description

  The present invention relates to a vibration damping device for an elevator tail cord that suppresses shaking of a tail cord passed from a building to an elevator car.

  Elevator tail cords (movement control cables) have low tension, are not restrained (supported), and have a long natural vibration period, so if the building vibrates greatly due to strong winds or earthquakes, the long vibration period is particularly long. When the building vibrates greatly due to periodic ground motion, the tail cord also shakes greatly.

  In particular, the tail cord on the side suspended from the car side is the longest on the top floor and is not restrained, so if the tail cord shakes greatly, it will collide with the hoistway wall, and other equipment and It is easy to get entangled with members, and accidents such as damage to the tail cord and equipment are likely to occur if the elevator is operated while being entangled.

  Therefore, a vibration damping structure that prevents the tail cord from shaking greatly is necessary, particularly when the car is on the top floor.

  As a countermeasure, in general elevators, wires and nets are stretched around the hoistway so that the tail cord does not get entangled with other equipment.

  However, since the tail cord is softer than other long main ropes, when touching the inside of the hoistway, it is not possible to fully expect the effect because it wraps around the wires that are stretched around.

  Therefore, for example, as an invention of an elevator tail cord damping device, there has been proposed one that attempts to damping the tail cord by always applying tension to the tail cord in accordance with the movement of the tail cord (see Patent Document 1). ).

  On the other hand, as a structure that suppresses the shaking of the side fixed to the building in the tail cord shaking suppression, a structure that suppresses the displacement by a magnetic force has been proposed (see Patent Document 2).

JP 2002-46957 A JP-A-8-259143

  However, in the prior art described in Patent Document 1, the tension wheel to which tension is applied is structured to be displaced up and down in accordance with the lifting and lowering movement of the tail cord in a state where its own weight is supported by the tail cord. In order to apply tension to the tail cord in such a state, there is a disadvantage that complicated operations such as high-precision installation and adjustment are required.

  In the prior art described in Patent Document 2, when the car is located on the top floor, the contact area between the tail cord and the vibration suppressing magnetic member becomes small. There was a concern that the vibration control effect could not be obtained for the suspended tail cord.

  The present invention has been made in view of these points, and an object of the present invention is to suppress the vibration of an elevator tail cord that can control the vibration of the tail cord with a simple structure even when the car is located on the top floor. To provide the equipment.

  In order to achieve the above object, the present invention provides a tail cord that is provided between a hoistway in which a car moves up and down and a car, and that is displaced up and down in the hoistway in accordance with the raising and lowering of the car. In the elevator tail cord damping device to be suppressed, one end of the elevator tail cord is attached to the hoistway, and the other end is formed at the lowermost portion of the tail cord in the vertical direction when the car is located at the uppermost portion of the hoistway. It is configured to apply a tension by abutting against the bent portion and to displace the abutting position on the tail cord following the displacement of the tail cord.

  The elevator tail cord vibration damping device of the present invention can control the tail cord vibration with a simple structure even when the car is located on the top floor.

The side view which shows the case where a passenger car is located in the uppermost part of a hoistway in 1st Embodiment of the damping device of the elevator tail cord which is this invention. The side view which shows the case where a passenger car is located in the lowest part of a hoistway in 1st Embodiment of the damping device of the elevator tail cord which is this invention. The side view which shows the case where two tail cords are provided in 1st Embodiment of the damping device of the elevator tail cord which is this invention. The side view which shows the case where a passenger car is located in the lowermost part of a hoistway in 2nd Embodiment of the vibration damping device of the elevator tail code | cord | chord which is this invention. The side view which shows the case where a passenger car is located in the lowermost part of a hoistway in 3rd Embodiment of the damping device of the elevator tail cord which is this invention.

  Hereinafter, a first embodiment of a vibration damping device for an elevator tail cord according to the present invention will be described with reference to FIGS.

  As shown in the figure, a tail cord 2 is provided between the hoistway 50 where the car 1 moves up and down and the car 1 to exchange control signals, electric power, and the like.

  Further, one end of the tail cord 2 is fixed to the hoistway 50, but a portion that hangs downward is configured to be displaced up and down in the hoistway 50 in accordance with the raising and lowering of the car 1. Yes.

  Furthermore, the tail cord 2 is generally composed of a plurality of multi-core cables such as control lines and power lines, and a steel cord that is a reinforcing material for supporting the weight of the tail cord 2, and these are covered with an insulating material.

  Furthermore, the tail cord 2 has a rectangular cross-sectional shape to prevent twisting, and is provided between the hoistway 50 and the car 1 with a length that takes into account the stroke of the car 1.

  The vibration damping device for an elevator tail cord according to the present invention has an elongated attachment member 4 whose one end is rotatably supported by the hoistway 50 via attachment members 5, 6, and the attachment member 4. The tension roller 3 is provided on the other end side and rotates in contact with the tail cord 2 to apply tension.

  In addition, as shown in FIG. 1, the tension roller 3 abuts against a bent portion 2 </ b> R formed at the bottom in the vertical direction of the tail cord 2 when the car 1 is positioned at the top of the hoistway 50. It is configured to apply tension.

  Further, as shown in the figure, the car 1 is lowered to the lowermost part of the hoistway 50 and is configured to displace the contact position with the tail cord 2 following the displacement of the tail cord 2 following it. .

  According to the elevator tail cord vibration damping device of the present invention, as shown in FIG. 1, the bent portion of the tail cord 2 formed when the car 1 moves to the uppermost floor (the uppermost part of the hoistway 50). Even if a long-period ground motion occurs when the car 1 is located on the uppermost floor (the uppermost part of the hoistway 50), the tension roller 3 is installed on the 2R so as to apply tension downward to the tail cord 2. Since the tension roller 3 can apply tension to the tail cord 2 to shorten the natural period of the tail cord 2, the tail cord 2 can be prevented from shaking to prevent the tail cord 2 and the equipment in the hoistway from contacting each other. It is possible to prevent damage to both.

  Further, the car 1 descends to the lowermost part of the hoistway 50 and follows the displacement of the tail cord 2 following it, so that the contact position of the tension roller 3 with the tail cord 2 is displaced. Therefore, even when the car 1 is lowered to the lowermost part of the hoistway 50, it is possible to apply tension to the tail cord 2.

  Further, since the tension roller 3 is fixed to the hoistway 50 or a guide rail (not shown) by the mounting members 4, 5, 6, all of its own weight is not supported by the tail cord 2, and its installation and adjustment work is easy. In addition, the overall configuration can be simplified accordingly.

  Further, in the state where the car 1 is lowered, the tension roller rotates downward as shown in FIG.

  In FIGS. 1 and 2, the number of tail cords 2 is shown as one, but the same applies to a case where there are two or more tail cords 2 and the structure shown in FIG.

  Next, a second embodiment of a vibration damping device for an elevator tail cord according to the present invention will be described with reference to FIG.

  In this embodiment, the attachment members 4 to 6 and the tension roller 3 are separately provided on each of the two tail cords 2 and 30 to constitute an elevator tail cord damping device.

  By configuring the vibration damping device in this way, the same effect as that of the first embodiment can be obtained even in the tail cord of a super high-rise elevator including a plurality of elevators.

  Next, a third embodiment of the vibration damping device for an elevator tail cord according to the present invention will be described with reference to FIG.

  According to this embodiment, the first attachment members 4 to 6 and the first tension roller 3 are provided so as to come into contact with the upper tail cord 2 of the plurality of tail cords 2 and 30 provided, A second mounting member 10 extending from the first mounting member 4 is provided, and a second tension roller 11 that abuts the lower tail cord 30 is provided on the second mounting member, so that the elevator tail cord A vibration damping device is configured.

  As described above, the second tension roller 11 is installed to be pressed against the tail cord 30 on the lower side through the second mounting member 10 from the rotation support portion of the first tension roller 3. Since tension can be applied to the cords 2 and 30, the natural vibration period of the tail cords 2 and 30 can be shortened as in the first and second embodiments.

  As a result, the tail cords 2 and 30 can be made difficult to swing with respect to the shaking of the building with a long cycle, and the tail cords 2 and 30 can be prevented from coming into contact with the equipment in the hoistway, and damage to both can be prevented.

  Furthermore, according to the present embodiment, since the attachment portion to the hoistway 50 is shared, the number of members can be reduced to further simplify the configuration, and installation and adjustment work can be made more efficient accordingly.

DESCRIPTION OF SYMBOLS 1 ... Car, 2 ... Tail cord, 2R ... Tail cord bending part, 3 ... Tension roller 4, 5, 6 ... Mounting member, 10 ... Second mounting member, 11 ... Second tension roller, 30 ... Tail Code, 50 ... hoistway

Claims (4)

In a damping device for an elevator tail cord, which is provided between a hoistway where a car goes up and down and a car, and suppresses shaking of a tail cord which moves up and down in the hoistway according to the raising and lowering of the car,
One end is attached to the hoistway, and the other end abuts against a bent portion formed at the lowermost portion of the tail cord in the vertical direction when the car is located at the uppermost portion of the hoistway to apply tension. In addition, the vibration damping device for an elevator tail cord is configured to displace the contact position with the tail cord following the displacement of the tail cord. 2. The elevator tail cord vibration damping device according to claim 1, wherein the mounting member is provided on the one end side and is rotatably supported with respect to the hoistway, and the tail is provided on the other end side of the mounting member. A vibration damping device for an elevator tail cord, characterized in that it is provided with a tension roller that abuts on the cord and rotates to apply tension. 3. The elevator tail cord damping device according to claim 2, wherein the attachment member and the tension roller are provided separately for each of the plurality of tail cords provided. 3. The elevator tail cord vibration damping device according to claim 2, wherein a first attachment member and a first tension roller are provided so as to contact an upper tail cord of the plurality of tail cords provided, and A vibration damping device for an elevator tail cord, comprising: a second attachment member extending from one attachment member; and a second tension roller attached to the second attachment member and in contact with the lower tail cord. apparatus.

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