JP2015003799A - Vibration control device for elevator tail cord - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration control device for an elevator tail cord capable of suppressing the swinging of the tail cord by a simple structure even when a car is located at the lowest floor.SOLUTION: In a vibration control device for an elevator tail cord laid between a wall surface of a hoistway 20 where a car 1 moves upward and downward and the car 1 that suppresses the swinging of a tail cord 2 that is displaced when the car 1 moves upward and downward, one end side is connected to the lower part of the car 1 while the other end side is in contact with the tail cord 2. The position where the other end side contacts the tail cord 2 can be displaced by the displacement of the tail cord 2. When the car 1 is located at the lowest floor, the other end side contacts a bent part 2R formed at the lowest part in the vertical direction of the tail cord 2 and imparts tensile force to the tail cord 2.

Description

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

  The elevator includes a tail cord (movement control cable) that connects a car that moves up and down the hoistway provided in the building and a control panel of the car. The tail cord is spanned between the car and the wall surface of the hoistway, moves up and down with the movement of the car, and transmits a control signal, electric power, and the like to the car.

  The elevator tail cord has a small natural period of vibration because it has a small acting tension and is not supported except at both ends. For this reason, for example, when the building vibrates greatly due to strong winds or earthquakes, particularly long-period ground motion with a long vibration period, the tail cord may also be greatly shaken. In particular, the tail cord suspended on the building side is in a state where it hangs longest when the car is located on the lowest floor, and is not restrained except at both ends. For this reason, when the tail cord is greatly shaken, it collides with the wall surface of the hoistway, and at this time, the tail cord is easily entangled with other devices and members. If the elevator is operated with the tail cord tangled, the tail cord and equipment may be damaged. Therefore, a vibration damping structure that prevents the tail cord from shaking greatly is necessary particularly when the car is located on the lowest floor.

  In Patent Document 1, as an example of a vibration control device for an elevator tail cord, a tension wheel that applies tension to the tail cord is provided, and the tail wheel engaged with the tail cord moves up and down a predetermined path to control the tail cord. A moving cable device for shaking is disclosed.

JP 2002-46957 A

  In conventional elevators, wires and nets are stretched around the hoistway so that the tail cord does not get tangled with other equipment when the tail cord swings. However, the tail cord has a smaller tension acting than a main rope, which is another long object, and therefore when the tail cord is greatly shaken in the hoistway, it may wrap around a stretched wire. For this reason, the method of stretching a wire or the like in the hoistway has not been expected to be sufficiently effective.

  In the moving cable device described in Patent Document 1, tension is constantly applied to the tail cord in accordance with the movement of the tail cord to dampen the tail cord. However, in order to elevate and lower the tension wheel that applies tension along with the movement of the tail cord, a structure in which a groove-shaped strip is erected in the hoistway and a gap is formed in the groove-shaped opening to fit the tension wheel and Therefore, the structure of the apparatus is complicated, and it is expected that the installation work and adjustment become complicated.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an elevator tail cord damping device that can suppress tail cord swinging with a simple structure even when the car is located on the lowest floor.

  The elevator tail cord vibration damping device according to the present invention has the following characteristics. In an elevator tail cord damping device that suppresses shaking of a tail cord that is bridged between a wall of a hoistway where a car goes up and down and the car, and is displaced by the raising and lowering of the car, one end side is Connected to the lower part of the car, the other end abuts the tail cord. The position where the other end side and the tail cord abut can be displaced by the displacement of the tail cord. The other end abuts against a bent portion formed at the lowest vertical direction of the tail cord when the car is located on the lowest floor, thereby applying tension to the tail cord.

  The vibration damping device for an elevator tail cord according to the present invention can suppress the tail cord swinging with a simple structure even when the car is located on the lowest floor.

It is a schematic diagram which shows the outline of the damping device of the tail code | cord | chord of the elevator by Example 1 of this invention, and is a side view which shows the state in which a passenger car is located in the lowest floor. In Example 1, it is a side view which shows the state which exists in the position which the passenger car rose from the lowest floor. In Example 1, the elevator provided with two tail cords is shown, It is a side view which shows the state in which a passenger car is located in the lowest floor. It is a schematic diagram which shows the outline of the damping device of the tail code | cord | chord of the elevator by Example 2 of this invention, and is a side view which shows the state in which a passenger car is located below the lowest floor. It is a schematic diagram which shows the outline of the damping device of the tail code | cord | chord of the elevator by Example 3 of this invention, and is a side view which shows the state in which a passenger car is located in the lowest floor. In Example 3, it is a schematic diagram which shows the example of the damping device with respect to three tail cords, and is a side view which shows the state which the passenger car is located in the lowest floor. In Example 3, it is a schematic diagram which shows another example of the damping device with respect to three tail cords, and is a side view which shows the state which a car is located in the lowest floor.

  The elevator tail cord damping device according to the present invention is provided at the lower part of the car, applies a tension higher than the tension of the tail cord by its own weight, shortens the natural period of the tail cord vibration, and reduces the tail cord vibration. Suppresses shaking. More specifically, a rotating member is provided at the lower portion of the car, and the rotating force is applied to the tail cord by the rotating member so as to prevent the tail cord from shaking. The elevator tail cord vibration damping device according to the present invention has a simple structure including a rotating member and its mounting member, can reduce the natural period of vibration of the tail cord, and the car is positioned on the lowest floor. Even if it is, the tail cord can be prevented from shaking. For this reason, even when the building vibrates greatly due to strong winds or when the building vibrates greatly due to an earthquake, particularly a long-period ground motion with a long vibration period, it is possible to make the tail cord difficult to shake. In addition, the elevator tail cord damping device according to the present invention is small in size and has an advantage that it can be easily attached to an existing elevator.

  Hereinafter, embodiments of a vibration damping device for an elevator tail cord according to the present invention will be described.

  The elevator tail cord vibration damping device according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic diagram showing an outline of the tail cord damping device according to the first embodiment, and is a side view showing a state in which the car is located on the lowest floor.

  The elevator includes a car 1 that moves up and down in a hoistway 20 provided in a building, and a tail cord 2 that is bridged between the car 1 and the wall surface of the hoistway 20.

  The car 1 is suspended inside the hoistway 20 by a main rope (not shown), and a tail cord 2 is attached to the lower part. Control signals, electric power, and the like of the car 1 are transmitted between the hoistway 20 and the control panel and the car 1 by the tail cord 2.

  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. The tail cord 2 has a rectangular cross-sectional shape to prevent torsion, has a length that takes into account the travel of the car 1, and both ends are connected to the car 1 and the wall surface of the hoistway 20, respectively. .

  In addition, since the tail cord 2 is bridged between the car 1 and the wall surface of the hoistway 20, a bent portion 2R is formed at the lowermost part in the vertical direction. The tail cord 2 is displaced up and down following the raising and lowering of the car 1, and the position of the bent portion 2R is also displaced.

  The tail cord damping device according to this embodiment includes a tension roller 3 that is provided at a lower portion of the car 1 and is a rotating member. The tension roller 3 is rotatably provided at the lower portion of the car 1 by mounting members 4, 5 and 6.

  The attachment member 4 has an elongated shape, and one end side is rotatably supported by the lower portion of the car 1 via the attachment members 5 and 6.

  The tension roller 3 is rotatably supported on the other end side of the attachment member 4, abuts against the tail cord 2, and can be rotated by the displacement of the tail cord 2. The weight of the tension roller 3 and the attachment member 4 is mainly used. Thus, tension is applied to the tail cord 2. As shown in FIG. 1, the tension roller 3 is provided at the lower part of the car 1. Specifically, when the car 1 is located on the lowermost floor in the hoistway 20, the tension roller 3 abuts against the bent portion 2R of the tail cord 2 and applies a downward force to the tail cord 2. The tension roller 3 is provided at such a position as to be able to. The position where the tension roller 3 and the tail cord 2 abut can be displaced by the displacement of the tail cord 2 due to the raising and lowering of the car 1 (that is, by the displacement of the bent portion 2R).

  The weights of the tension roller 3 and the attachment member 4 can be determined based on the length and weight of the tail cord 2, for example. Further, the shape of the tension roller 3 is preferably a cylindrical shape.

  The tail cord 2 suspended on the building side is greatly shaken by the influence of the vibration of the building when the building vibrates greatly or vibrates at a long period due to strong winds or earthquakes. The biggest influence is when the tail cord 2 suspended on the building side is hanging down for the longest time, and when the car 1 is located on the lowest floor.

  The tension roller 3 can give the tail cord 2 tension equal to or greater than the tension due to the weight of the tail cord 2 when the car 1 is located on the lowest floor. For this reason, even when the car 1 is located on the lowest floor and the building vibrates greatly or vibrates at a long period, the natural period of vibration of the tail cord 2 can be shortened. 2 can be suppressed.

  Further, when the car 1 is located at a position where the tension roller 3 can apply a downward force to the tail cord 2 even if the car 1 is not located on the lowest floor, The roller 3 can give the tail cord 2 tension equal to or greater than the tension due to its own weight, shorten the natural period of vibration of the tail cord 2, and suppress the tail cord 2 from shaking.

  FIG. 2 is a side view showing a state where the car is in a position raised from the lowest floor in the present embodiment. When the car 1 rises from the lowest floor, the tension roller 3 rotates by the displacement of the tail cord 2 while contacting the tail cord 2, and the attachment member 4 rotates downward in the vertical direction. When the car 1 is lowered, the tension roller 3 is rotated by the displacement of the tail cord 2 while being in contact with the tail cord 2, and the mounting member 4 is rotated upward in the vertical direction. For this reason, the tail cord damping device according to the present embodiment does not prevent the car 1 from being raised and lowered.

  The tail cord damping device according to the present embodiment can also be applied to an elevator having a plurality of tail cords. In this case, when the car 1 is located on the lowermost floor in the hoistway 20, the tension roller 3 is brought into contact with the tail cord whose bent portion is located at the uppermost position, and a downward force is applied to the tail cord. To give.

  FIG. 3 shows an elevator in which two tail cords 2 and 30 are provided between the lower part of the car 1 and the wall surface of the hoistway 20, and the car 1 is located on the lowest floor. It is a side view which shows the state which exists. Since the bent portion 2R of the tail cord 2 is positioned above the bent portion 30R of the tail cord 30, the tension roller 3 is brought into contact with the tail cord 2 to suppress the tail cord 2 from shaking. The tail cord 30 is prevented from shaking due to friction with the tail cord 2.

  Thus, even for an elevator having a plurality of tail cords, the tail cord damping device according to the present embodiment can suppress tail cord shaking.

  The elevator tail cord vibration damping device according to the second embodiment of the present invention will be described with reference to FIG. FIG. 4 is a schematic diagram illustrating an outline of the tail cord damping device according to the second embodiment, and is a side view illustrating a state where the car 1 is positioned below the lowest floor. 4, the same reference numerals as those in FIG. 1 denote the same components as those in FIG.

  The car 1 may be further lowered from the state where it is located on the lowest floor (see FIG. 1). In such a case, in the vibration damping device having a structure in which the tension roller 3 and the attachment member 4 are in contact with the device (pit device) installed in the pit (bottom of the hoistway 20) or the wall surface of the hoistway 20, There is a possibility that the movement of the car 1 is hindered.

  The tail cord damping device according to the present embodiment includes a guide member 40 at the lower portion of the car 1, and the mounting members 4, 5, and 6 are separated from the wall surface of the hoistway 20 along the guide member 40 (FIG. 4). To the right). That is, the attachment member 4 can move in a direction away from the wall surface of the hoistway 20 along the guide member 40 via the attachment members 5 and 6. Examples of the guide member 40 include a rail and a groove. In FIG. 4, a rail is used for the guide member 40 as an example.

  When the car 1 is further lowered from the state where the car 1 is located on the lowest floor (see FIG. 1), the tail cord 2 applies an upward force to the tension roller 3. With this force, the tension roller 3 moves upward, and the attachment members 4, 5 and 6 move along the guide member 40 in a direction away from the wall surface of the hoistway 20 (see FIG. 4).

  With such a configuration, even when the car 1 further descends from the lowest floor, the tension roller 3 and the attachment member 4 move away from the wall surface of the hoistway 20 and the pits. There is no contact with the pit equipment, and the elevator 1 is not hindered.

  When the car 1 is lifted from a state where it is further lowered from the lowest floor (see FIG. 4), as the car 1 is lifted, the force with which the tail cord 2 pushes the tension roller 3 upward is weakened. The tension roller 3 is rotated by the displacement of the tail cord 2 while contacting the tail cord 2, and the attachment member 4 is rotated downward in the vertical direction. By this operation, the attachment members 4, 5 and 6 move along the guide member 40 in the direction approaching the wall surface of the hoistway 20, and return to the state shown in FIG. 1.

  The elevator tail cord vibration damping device according to the third embodiment of the present invention will be described with reference to FIG. FIG. 5 is a schematic diagram showing an outline of the tail cord damping device according to the third embodiment, and is a side view showing a state where the car 1 is located on the lowest floor. 5, the same reference numerals as those in FIG. 3 denote the same components as those in FIG.

  The tail cord damping device according to the present embodiment is applicable to an elevator having a plurality of tail cords (two in the example of FIG. 5). As shown in FIG. 5, two tail cords 2 and 30 are provided between the lower portion of the car 1 and the wall surface of the hoistway 20. Among these tail cords, a tension roller 3 rotatably supported by the attachment member 4 is in contact with the tail cord 2 positioned above.

  The mounting member 4 is further provided with a second mounting member 10 so as to be rotatable. The second attachment member 10 extends from the attachment member 4, one end side is rotatably supported by the attachment member 4, and the second tension roller 11 is rotatably provided at the other end side. The second tension roller 11 is rotatably supported on the other end side of the second mounting member 10 and abuts on the tail cord 30 to cause displacement of the tail cord 30 (that is, by displacement of the bent portion 30R). ) Rotate and apply tension to the tail cord 30 mainly by the weight of the second tension roller 11 and the second mounting member 10.

  The second tension roller 11 is a rotating member similar to the tension roller 3, and the second attachment member 10 is elongated like the attachment member 4. The operation and action of the second tension roller 11 with respect to the tail cord 30 are the same as the action and action of the tension roller 3 with respect to the tail cord 2, and thus the description thereof is omitted.

  Thus, by providing the tension roller 3 on the attachment member 4 and providing the second tension roller 11 on the attachment member 4 via the second attachment member 10, the tension roller 3 and the second tension roller 11 are Each of the tail cords 2 and 30 can be given a tension equal to or greater than the tension due to its own weight. Therefore, the tail cord damping device according to the present embodiment can shorten the natural period of vibration of the tail cords 2 and 30 in the same manner as the tail cord damping device according to the first embodiment. Can be suppressed.

  Even in an elevator having three or more tail cords, it is possible to suppress the swing of each tail cord by providing a tension roller for each tail cord via an attachment member.

  6A and 6B are schematic views showing an outline of a tail cord damping device in an elevator having three tail cords, and are side views showing a state in which the car 1 is located on the lowest floor. . A tension roller 3, a second tension roller 11, and a third tension roller 52 are provided so as to abut against the three tail cords 2, 30 and 50, respectively. The third tension roller 52 is rotatably supported by the third attachment member 51 and abuts on the tail cord 50 having the bent portion 50R. As shown in FIG. 6A, the third attachment member 51 may be provided so as to extend freely from the second attachment member 10, or as shown in FIG. 6B, the third attachment member 51 rotates from the attachment member 4. You may provide so that it may extend freely. Thus, the third attachment member 51 is provided so as to extend indirectly or directly from the attachment member 4.

  Similarly, for an elevator having four or more tail cords, a tension roller that abuts on each tail cord can be rotatably provided on an attachment member that extends indirectly or directly from the attachment member 4. , Each tail cord can be prevented from shaking. As described above, the tail cord damping device according to the present embodiment can suppress the swing of each tail cord even for an elevator having a plurality of tail cords.

  In the first embodiment as well, it has been described using FIG. 3 that the tail cord swing of an elevator having a plurality of tail cords can be suppressed. In the tail cord damping device according to the present embodiment, since the tension roller is provided for each tail cord, it is possible to more reliably suppress the shaking of each tail cord.

  In addition, this invention is not limited to said Example, Various modifications are included. For example, the above-described embodiments are described in detail for easy understanding of the present invention, and the present invention is not necessarily limited to an aspect including all the configurations described.

  DESCRIPTION OF SYMBOLS 1 ... Car, 2 ... Tail cord, 2R ... Bending part of tail cord, 3 ... Tension roller 4, 5, 6 ... Mounting member, 10 ... Second mounting member, 11 ... Second tension roller, 20 ... Hoistway, 30 ... tail cord, 30R ... bent portion of tail cord, 40 ... guide member, 50R ... bent portion of tail cord, 51 ... third mounting member, 52 ... third tension roller.

Claims (4)

In the elevator tail cord damping device that suppresses the swing of the tail cord that is bridged between the wall of the hoistway where the car goes up and down and the car and is displaced by the raising and lowering of the car,
One end side is connected to the lower part of the car,
The other end abuts the tail cord,
The position where the other end side and the tail cord abut can be displaced by the displacement of the tail cord,
The other end side is in contact with a bent portion formed at the lowest vertical direction of the tail cord when the car is located on the lowest floor, and applies tension to the tail cord.
An elevator tail cord damping device characterized by that. In the elevator tail cord vibration damping device according to claim 1,
The one end side is provided with a mounting member that is rotatably supported by the lower part of the car,
An elevator tail cord vibration damping device provided with a turning member that is rotatably supported by the mounting member and abutted against the tail cord on the other end side. In the elevator tail cord vibration damping device according to claim 2,
A guide member provided at a lower portion of the car;
The one end side is a vibration damping device for an elevator tail cord that is movable along the guide member. In the elevator tail cord vibration damping device according to claim 2,
A plurality of the rotating members are provided,
Each of the rotating members abuts against each of the plurality of tail cords, and is an elevator tail cord damping device that is rotatably supported by a member extending from the mounting member.

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