JP2004137019A - Tail code mounting apparatus of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tail code mounting apparatus suited for a high stroke. <P>SOLUTION: A shackle rod 5 is provided individually for each wire rope 3 for suspension. The shackle rod comprises a rope socket 6 having a cylindrical rope retention section 9 being extended up and down; an wedge-like rope presser member 7 that is freely inserted into the rope retention member so that it can move up and down; and a rod 8 for suspending and supporting the rope socket. The rope retention section is formed so that its inner diameter is reduced in a tapered shape toward the lower portion. The rope presser member is formed so that the edge section of the wire rope for suspension being bent along the outer periphery section is pressure-welded to the inner surface of the rope retention section for fixing and retaining. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an elevator tail cord suspension, and more particularly to a tail cord suspension suitable for a high-stroke elevator.
[0002]
[Prior art]
The elevator supplied power to and transmitted signals from the car via a tail cord suspended between the car and the hoistway. FIG. 6 is a diagram showing a conventional general tail cord suspension method. In the figure, two suspension wire ropes 102 are disposed in a tail cord 101, and the sheath (coating) of the tail cord 101 is broken to protrude the end of each wire rope 102 to the outside, so that the inverted U It is formed into a letter shape, and the formed ends are shifted up and down and bound by a wire clip 103.
[0003]
Then, the end of the upper suspension wire rope 102 is hooked by a crane and transported to a suspension position, and the end of the lower suspension wire rope 102 is hooked and supported on a cylindrical thimble 104 fixed to a hoistway. Let it. Note that the suspension load applied to the two suspension wire ropes 102 is uniformly maintained by the sliding between the suspension wire rope 102 and the thimble 104.
[0004]
Since the suspension load applied to the tail cord 101 increases as the lift stroke of the elevator increases, the durability of the suspension wire rope 102 is increased by increasing the diameter of the suspension wire rope 102.
[0005]
[Problems to be solved by the invention]
However, when the diameter of the suspension wire rope 102 is increased, the ratio of the diameter of the suspension wire rope 102 to the diameter of the thimble 104 is reduced, and the bending stress applied to the strand of the suspension wire rope 102 is increased. The life of the wire rope 102 is shortened. The suspension wire rope 102 is a component on which a load is repeatedly applied by raising and lowering the car. In particular, the end portion of the suspension wire rope 102 may cause fatigue failure due to repeated bending. Therefore, the diameter of the suspension wire rope 102 should be increased. Is not preferred.
[0006]
On the other hand, if the diameter of the thimble 104 is increased as the diameter of the suspension wire rope 102 increases, the distance between the two thimbles 104 needs to be increased, and the tail cords 101 are arranged in parallel in a narrow hoistway. It will be difficult to do.
[0007]
Further, since the wire clip 103 is used for fastening the two suspension wire ropes 102 and the suspension load of the tail cord 101 is supported by the frictional force between the suspension wire rope 102 and the wire clip 103, There was also a problem that the strength of the wire rope 102 was not fully utilized within the allowable load range.
[0008]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a tail cord suspension suitable for a high-stroke elevator.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention suspends and supports the ends of a plurality of suspension wire ropes arranged in a tail cord for performing power supply and transmission / reception of signals to and from the car, and the tail cord. An elevator tail cord suspension device for suspending between a hoistway and a car, wherein each suspension wire rope is provided individually with a shackle rod.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. 1 is a front view of the first embodiment of the present invention, FIG. 2 is a left side view of FIG. 1, FIG. 3 is an enlarged front view of the rope socket, and FIG. 4 is a left side view of FIG.
[0011]
In FIG. 1, reference numeral 1 denotes a tail cord for supplying electric power to and transmitting and receiving signals from a car, and two suspension wire ropes 2 are arranged inside the tail cord so as to extend in the longitudinal direction. A part of the sheath (coating) of the tail cord 1 is broken near the hitch block 3 (attached portion), and the end of each suspension wire rope 2 is projected outside. The hitch block 3 is fixed to a tail cord receiving beam 4 provided in a hoistway or under a car.
[0012]
The ends of the suspension wire ropes 2 are individually suspended from the hitch block 3 via shackle rods 5. The pair of shackle rods 5 constitute the tail cord suspension device of the present embodiment. The shackle rod 5 includes a rope socket 6, a rope holding member 7 (see FIGS. 3 and 4), and a rod 8.
[0013]
As shown in FIGS. 3 and 4, the rope socket 6 includes a flat tubular rope holding portion 9 and a pair of supporting portions 10 protruding upward from an upper end of the rope holding portion 9. . The inner diameter D of the rope holding portion 9 in the major diameter direction is tapered downward. A through hole 11 for attaching the rod 8 is formed at the upper end of each support portion 10.
[0014]
The rope holding member 7 is plate-shaped and wedge-shaped, and a groove 12 for receiving the suspension wire rope 2 in the radial direction is formed on the entire outer periphery thereof. The end of the suspension wire rope 2 is passed through the rope holding portion 9 from the lower end side of the rope holding portion 9, and the end of the suspension wire rope 2 protruding above the rope holding portion 9 is inserted into the groove 12 of the rope holding member 7. When the rope holding member 7 is inserted into the rope holding portion 9 and the tip of the suspension wire rope 2 protruding from the lower end of the rope holding portion 9 is pulled downward, the rope is bent. The holding member 7 is pushed deeply by the rope holding portion 9, and the end of the suspension wire rope 2 housed in the groove 12 is pressed against the tapered inner surface 9 a of the rope holding portion 9 to be fixed and held on the rope holding portion 9. It will be in the state that was done.
[0015]
The end of the end of the suspension wire rope 2 protruding from the lower end of the rope holding portion 9 is connected to a portion of the end of the suspension wire rope 2 that does not enter the rope holding portion 9 via a fixing member 12 (see FIG. 1). Fixed.
[0016]
The lower end of the rod 8 is connected to the rope socket 6 via a fastening member 13 attached to the through hole 11 of the support 10 of the rope socket 6. On the other hand, the upper end of the rod 8 protrudes upward through a vertically extending through hole 14 formed in the hitch block 3, and a nut 15 is screwed into a screw thread formed on the outer peripheral portion.
[0017]
A coil spring 16 is coaxially mounted on a portion of the rod 8 between the nut 15 and the hitch block 3, and the upper end surface thereof is pressed against the nut 15 via a flat washer 17. Thus, the rod 8 is elastically supported by the hitch block 3 so as to be movable in the axial direction.
[0018]
Further, a rod-shaped detent member 18 (detent means) is provided, which penetrates each rope socket 6 horizontally, and nuts 19 are screwed into threads formed on the outer peripheral portions at both ends thereof, so that the rope socket 6 is rotated. It is prevented from getting out of. The rotation preventing member 18 prevents each rope socket 6 from rotating around the axis of the rod 8.
[0019]
In the tail cord suspension device configured as described above, the suspension load of the tail cord 1 is applied to the two suspension wire ropes 2, and the hitch block 3 is transmitted from the shackle rod 5 via the nut 15, the flat washer 17, and the coil spring 16. And the tail cord receiving beam 4.
[0020]
The load applied to the two suspension wire ropes 2 may not be uniform depending on the attachment state of the suspension wire ropes 2 and the shackle rod 5, and at this time, the nut 15 is adjusted by turning. Further, the unbalance of the load due to the elongation of the suspension wire rope 2 is equalized by the coil spring 5.
[0021]
When a load is applied to the suspension wire rope 2, a re-twisting force acts on the suspension wire rope 2 to try to rotate the rope socket 6 around the axis of the rod 8. Since rotation of 6 is prevented, untwisting of the suspension wire rope 2 can be prevented. Further, since the rotation of the rope socket 6 is prevented, the rotation of the nut 15 with respect to the rod 8 can also be prevented.
[0022]
In this tail cord suspension device, the load is equally applied to the two suspension wire ropes 2 and the strength of each suspension wire rope 2 can be sufficiently utilized within the allowable load range, so that the durability is improved. high. Therefore, the safety is improved, and the life of the suspension wire rope is extended, so that the running cost is reduced.
[0023]
Further, since the load is supported by the two suspension wire ropes 2, it is not necessary to increase the diameter of the suspension wire rope 2, and fatigue fracture due to bending is less likely to occur. And since the bending radius of the suspension wire rope 2 does not become large, it is easy to arrange a plurality of tail cords in parallel.
[0024]
Furthermore, since each suspension wire rope 2 is individually supported, even if one suspension wire rope 2 is cut, the tail cord 1 can be prevented from falling. Also, suspension with three or more suspension wire ropes 2 is possible.
[0025]
Next, a second embodiment of the present invention will be described. FIG. 5 is a front view of a main part of the second embodiment of the present invention. Note that the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.
[0026]
In the present embodiment, a viscous fluid is used in place of the coil spring as a structure for elastically supporting the rod 8 of the shackle rod 5 on the hitch block 3. That is, the hitch block 3 is formed with a plurality of piston receiving holes 20 extending downward from the upper surface thereof, and the lower ends thereof are in communication with each other via the communication holes 21.
[0027]
A piston 22 is slidably accommodated in each piston accommodation hole 20. Each piston accommodating hole 20 and the communication hole 21 are filled with hydraulic oil 23 as a viscous fluid, and each piston 22 has an upper end projecting from the upper surface of the hitch block 3. The upper end surface of each piston 22 is in contact with the lower surface of the flat washer 17, and each rod 8 is elastically supported by the hydraulic oil 22 via the nut 15, the flat washer 17, and the piston 22.
[0028]
With this configuration, the load applied to each piston 22 is equalized by the hydraulic oil 23 based on the principle of Pascal, so that the imbalance of the load applied to the two suspension wire ropes 2 can be eliminated.
[0029]
【The invention's effect】
As described above, according to the present invention, since the ends of the suspension wire ropes are individually supported by the shackle rods, it is not necessary to increase the diameter of the suspension wire ropes. Fatigue failure due to bending of the wire rope hardly occurs.
[Brief description of the drawings]
FIG. 1 is a front view of a first embodiment of the present invention.
FIG. 2 is a left side view of FIG.
FIG. 3 is an enlarged front view of the rope socket; FIG. 4 is a left side view of FIG. 3;
FIG. 5 is a front view of a main part according to a second embodiment of the present invention.
FIG. 6 is a view showing a conventional general tail cord suspension method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Tail cord 2 Suspension wire rope 5 Shackle rod 6 Rope socket 7 Rope holding member 8 Rod

Claims (4)

For suspending and supporting the ends of a plurality of suspension wire ropes arranged in a tail cord for performing power supply and transmission / reception of signals to and from the car to suspend the tail cord between a hoistway and a car. A tail cord suspension system for an elevator, comprising: a shackle rod provided separately for each of the suspension wire ropes. The shackle rod includes a rope socket having a tubular rope holding portion extending vertically, a wedge-shaped rope holding member loosely inserted into the rope holding portion so as to be vertically movable, and a rod for suspending and supporting the rope socket. The rope holding portion is formed so that the inner diameter thereof is tapered downward, and the rope holding member is the suspension wire rope bent along the outer peripheral portion thereof. The tail cord suspension device for an elevator according to claim 1, wherein the end portion is formed so as to be pressed against and fixedly held to an inner surface of the rope holding portion. 3. The suspension system according to claim 2, further comprising detent means for preventing the rope socket from rotating about the axis of the rod. 4. The tail cord suspension device for an elevator according to claim 2, wherein each of the rods is elastically supported movably in an axial direction with respect to a mounted portion of a car or a hoistway. 5.

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