JP5501945B2 - Elevator cable suspension device and cable suspension method - Google Patents

Description

  The present invention relates to suspension of elevator cables.

  The elevator includes a hoistway that extends vertically and a car that is movably provided in the hoistway. The car is guided along guide rails fixed to walls, beams and the like constituting the hoistway. One end of a tail cord (control cable) is connected to the lower portion of the car, and the other end of the tail cord is connected to a device at an appropriate position in the hoistway. The tail cord transmits and receives various control signals and communication signals to the car, and supplies power.

  Patent Document 1 discloses a suspension device used for the suspension work of the tail cord as described above. In such a suspension device, in order to extend the life of the two wire ropes that are the reinforcing wires for suspension, each wire rope is fixed to an individual shackle rod, and each of the shackle rods is supported by an individual coil spring. It was fixed to. The shackle rod is threaded, and the load balance of the two wire ropes was adjusted by adjusting the fixing position in the height direction to the support beam of each shackle rod at the corresponding screw part. .

  However, in the above-described suspension apparatus, since load equalization is performed by manual adjustment work by an operator, it is not easy to achieve complete equalization. Moreover, since the load sharing ratio of the two wire ropes changes due to the elongation of the wire rope due to secular change, the working load of one of the two suspension wire ropes becomes large, resulting in a sufficient life extension. There was a possibility that could not be achieved.

JP 2004-137019 A

  The present invention has been made in view of the above, and it is an object of the present invention to provide an elevator cable suspension and the like that can easily ensure a load balance between a plurality of ropes.

  In order to achieve the above-described object, an elevator cable suspension system according to the present invention includes a plurality of connection bodies and a plurality of rotation / linear motion conversion portions provided corresponding to the connection bodies, and the plurality of connection bodies. Are prepared corresponding to a plurality of suspension ropes, the corresponding ropes are connected to the lower ends of the plurality of connection bodies, and the corresponding rotation straight lines are connected to the upper end sides of the connection bodies. A dynamic conversion unit is connected, and the rotation / linear motion conversion unit supports the connection body so as to move the connection body in a vertical direction when the connection body rotates due to twisting of the rope. ing.

  An elevator cable suspension method of the present invention that achieves the same object is a method of suspending an elevator cable via a plurality of suspension ropes, and a plurality of suspension cables are provided corresponding to the plurality of suspension ropes. The rotation / linear motion conversion portion is provided, and the rotation / linear motion conversion portion supports the corresponding rope for suspension in a state in which the rotation due to the twist of the rope is allowed, and the rotation rope is caused by the twist. When the rope rotates, the rope is supported while moving in the vertical direction.

  According to the elevator cable suspension and the like of the present invention, it is possible to easily ensure a load balance between a plurality of ropes.

It is a front view of the cable suspension apparatus which concerns on this Embodiment. It is a side view of FIG.

  DESCRIPTION OF EMBODIMENTS Embodiments of an elevator cable suspension apparatus and a suspension method according to the present invention will be described below with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts. In the embodiment described below, an example in which two wire ropes are assigned as suspension reinforcing wires per tail cord (flat control cable) will be described, but the present invention is limited to this. It is not a thing.

  FIG. 1 is a front view of a cable suspension apparatus according to the present embodiment, and FIG. 2 is a side view thereof. One end of the elevator tail cord (control cable) 1 is fixed to a well-known car side (not shown), and the other end is connected to the building side. Two wire ropes are assigned to each tail cord, and the two wire ropes 3a and 3b are inserted into the sheath (cover) of the tail cord 1 and extend along the longitudinal direction of the cord. . Then, the upper ends of the wire ropes 3a and 3b come out of the sheath from the appropriate position of the sheath of the tail cord 1, and are fixed to an appropriate fixing point on the building side through the cable suspension according to the present embodiment. .

  The cable suspension device 11 according to the present embodiment includes a plurality of (the same number as the wire rope, two in this example) connection bodies 13a and 13b, and a plurality (the same number as the wire rope and connection bodies; two in this example). ) Rotation / linear motion converters 15a and 15b.

  The connection bodies 13a and 13b are prepared for each of the wire ropes 3a and 3b, and the connection bodies 13a and 13b have terminal tools 17a and 17b and shackle rods 19a and 19b, respectively. The upper ends of the terminal devices 17a and 17b are connected to the lower ends of the corresponding shackle rods 19a and 19b so as to be rotatable with respect to each other. The upper ends of the corresponding wire ropes 3a and 3b are hooked on the lower ends of the terminal devices 17a and 17b (the lower ends of the connecting bodies 13a and 13b). More specifically, the upper ends of the wire ropes 3a and 3b are ring-shaped, and the rod-shaped portions formed on the terminal tools 17a and 17b are inserted inside the rings so that the terminal tools 17a and 17b are inserted. It is supported by. Therefore, the wire ropes 3a and 3b are supported so as to be swingable with respect to the connecting bodies 13a and 13b.

  Corresponding rotation / linear motion converters 15a and 15b are connected to the upper ends of the shackle rods 19a and 19b (upper ends of the connecting bodies 13a and 13b). As an example, the rotation / linear motion conversion units 15a and 15b in the present embodiment are constituted by ball screws 21a and 21b, respectively. The ball screws 21a and 21b include screw shaft bodies 23a and 23b and nut bodies 25a and 25b. Screw grooves are formed at the upper ends of the screw shaft bodies 23a and 23b, and the lower ends of the screw shaft bodies 23a and 23b are connected to the upper ends of the corresponding shackle rods 19a and 19b so as to be rotatable with respect to each other. . The nut bodies 25a and 25b are attached to the upper surface of a fixing metal 27 which is a fixing destination on the car side or the building side, and the shackle rods 19a and 19b below the screw shaft bodies 23a and 23b, the terminal devices 17a and 17b, and the like. Supports hanging.

  The rotation / linear motion conversion units 15a and 15b allow the connecting members 13a and 13b to rotate only by the rotational force generated due to the twisting of the wire ropes 3a and 3b without applying artificial rotational force. It is configured as follows. The rotation / linear motion conversion units 15a and 15b move the connection bodies 13a and 13b in the vertical direction when the connection bodies 13a and 13b rotate due to the twist of the wire ropes 3a and 3b.

  As a preferred configuration, the plurality of wire ropes include a pair in which the twisting directions are opposite to each other, and the rotation / linear motion conversion unit corresponding to such a pair of wire ropes connects the connection body in the vertical direction. It is comprised so that the rotation direction of the connection body in the case of moving to one direction (for example, the downward direction) may be opposite to each other. In other words, in the present embodiment, the pair of left and right wire ropes 3a and 3b have opposite twist directions. In addition, the pair of left and right rotation / linear motion converters 15a and 15b is also configured so that the rotation directions of the connection bodies 13a and 13b required to move the connection bodies 13a and 13b in the same vertical direction are opposite to each other. More specifically, the spiral direction of the screw grooves of the screw shaft bodies 23a and 23b is formed in the opposite direction.

  Next, the operation of the above-described cable suspension device and the operation of the suspension method will be described. First, the outline will be described. As shown in FIG. 1 and FIG. 2, tension is applied to each wire rope in a state where the wire rope is connected to the fixing destination by the cable suspension device. When tension is applied to the wire rope, the strands are twisted, and each wire rope rotates about its longitudinal direction. When the wire rope is rotated, the connecting body is also rotated, and the rotation is converted into a substantially linear movement by the rotation / linear motion converting portion and acts on the connecting body and the wire rope. Utilizing the fact that the amount of rotation changes depending on the magnitude of the tension, the load on the two suspension wire ropes is naturally equalized by changing the fixing position in the height direction with respect to the shackle rod fixing metal (support beam, etc.) The life of the wire rope for suspension is extended.

  This will be described in more detail below. When adjusting with the installation of the wire ropes 3a, 3b, when the load is not completely equalized between the wire ropes 3a, 3b, or when the two wire ropes 3a, 3a, When the load sharing ratio of 3b is changed, the working load of one of the two suspension wire ropes 3a and 3b is increased in relative relation, and the tension of the two wire ropes 3a and 3b is increased or decreased. A relationship arises. This causes a difference (large or small) in the amount of rotation of the wire ropes 3a, 3b in the longitudinal direction. This difference is based on the fact that the greater the tension, the greater the rotational force, and the smaller the tension, the smaller the rotational force.

  Among these, when the wire rope with the relatively large tension (the one with the larger amount of rotation) rotates, the screw shaft body of the corresponding rotation / linear motion conversion unit extends downward while synchronously rotating, and the wire rope is fixed. The position of the point (the terminal tool lower end / connector lower end) moves downward. On the other hand, the wire rope with the relatively small tension (the one with the smaller amount of rotation) is also connected via the rotation / linear motion conversion unit that changes the rotational motion to the linear motion. It is possible that the body extends downward and the position of the wire rope fixing point moves downward. However, as a whole, the amount of movement of the screw shaft body is proportional to the amount of rotation of the wire rope, so the amount of movement below the wire rope fixing point with respect to the wire rope having a relatively large tension is greater. This is larger than the downward movement amount of the wire rope fixing point with respect to the wire rope having a relatively small tension. For any wire rope, the distance from the fixed metal 27 (fixed point) to the upper ends of the wire ropes 3a, 3b is extended by moving the wire rope fixing point downward, and the wire ropes 3a, 3b, The tension applied to 3b decreases.

  From the above, the distance from the fixed point to the upper end of each wire rope is automatically and automatically proportional to the magnitude of the tension caused by the tension in each wire rope without applying an artificial load. Adjusted. Therefore, as a result of the automatic adjustment, the wire rope having a relatively high tension has a larger amount of extension, that is, the amount of decrease in tension is also relatively large. Then, as the tension having the larger tension is decreased, the tension difference that has occurred is eliminated, and the tension is kept in balance. When the tension is kept balanced, the rotational force generated in the two wire ropes becomes the same strength, and the rotational force is suppressed by canceling each other and the balance of the tension is maintained. In this way, it is possible to equalize the load of the two suspension wire ropes and to prolong the life of the suspension wire ropes.

  In addition, the length in the vertical direction is automatically adjusted by the rotation / linear motion conversion unit that changes the rotation motion to the straight motion, and as a result, the lengths of the two wire ropes may be different. This is not a problem in achieving the object of the present invention. This is because the purpose of the present invention is not to keep the lengths of the wire ropes equal, but by adjusting the overall length including the wire ropes, the difference in tension applied to both wire ropes can be adjusted. This is because the aim is to achieve a balance. In other words, the tensions on the two wire ropes are not equal to each other and are constantly changing, so when the length direction is adjusted to obtain a balance of tension, the length of both wire ropes is consequently affected. However, it is sufficient if the tension is balanced.

  As described above, according to the cable suspension apparatus according to the present embodiment, without applying an artificial load, the tension in each wire rope is caused in proportion to the magnitude of the tension from the fixing destination. The distance to the upper end of each wire rope is automatically adjusted automatically, and the load balance between the plurality of wire ropes can be easily ensured. Also, if the strand twist direction is arranged in the same direction with respect to a pair of wire ropes, the direction of rotation of the wire rope caused by the shape elasticity of the strand twist is also the same, so there is a problem that the force to rotate in one direction becomes strong In this embodiment, by making the twisting directions different between the pair of wire ropes, when the rotational forces generated from both wire ropes are in opposite directions and have the same strength, they cancel each other out. The entire rotational force can be suppressed by utilizing the effect, and the above problem is also solved.

  Although the contents of the present invention have been specifically described with reference to the preferred embodiments, various modifications can be made by those skilled in the art based on the basic technical idea and teachings of the present invention. It is self-explanatory.

  DESCRIPTION OF SYMBOLS 1 Tail cord, 3a, 3b Wire rope, 11 Cable suspension apparatus, 13a, 13b Connection body, 15a, 15b Rotation linear motion conversion part, 21a, 21b Ball screw.

Claims (6)

A plurality of connection bodies, and a plurality of rotation / linear motion conversion portions provided corresponding to the connection bodies,
The plurality of connection bodies are prepared corresponding to a plurality of suspension ropes, the corresponding ropes are connected to the lower end side of the plurality of connection bodies, and the upper end side of the plurality of connection bodies, The corresponding rotation / linear motion conversion unit is connected,
The rotation / linear motion conversion unit is a cable suspension system for an elevator that supports the connection body so as to move the connection body in the vertical direction when the connection body rotates due to twisting of the rope. The plurality of suspension ropes include a pair in which twist directions are opposite to each other,
The pair of rotation / linear motion conversion units corresponding to the pair of ropes described above are configured such that the rotation directions of the connection bodies for moving the corresponding connection bodies downward are opposite to each other. The elevator cable suspension system of claim 1.   3. The elevator cable suspension device according to claim 1, wherein each of the rotation / linear motion conversion units is constituted by a ball screw. A method of suspending an elevator cable via a plurality of suspension ropes,
Corresponding to the plurality of suspension ropes, a plurality of rotation / linear motion conversion units are provided,
The rotation / linear motion converting unit supports the corresponding suspension rope in a state in which rotation due to twisting of the rope is allowed, and when the rope rotates due to twisting, A cable suspension method for an elevator that supports a rope while moving it up and down. The plurality of suspension ropes include a pair in which twist directions are opposite to each other,
5. The pair of rotation / linear motion conversion units corresponding to the pair of ropes described above, the rotation directions of the connection bodies for moving the corresponding connection bodies downward are opposite to each other. Elevator cable suspension method.   6. The elevator cable suspending method according to claim 4 or 5, wherein each of the rotation / linear motion converting portions is constituted by a ball screw.

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