JP5001013B2 - Elevator equipment - Google Patents

Description

  The present invention relates to an elevator apparatus in which a tail cord is suspended at a lower part of a car.

  A tail cord suspension structure in a general elevator apparatus will be described with reference to FIGS. FIG. 5 is a cross-sectional view of a hoistway explaining the outline of a conventional elevator tail cord suspension structure, FIG. 6 is a schematic view of a car bottom suspension structure in FIG. 5, and FIG. 7 is an illustration of the elevator tail cord suspension structure in FIG. It is a top view.

  As shown in FIG. 5, a car 7 suspended by a main rope 6 and provided with guide devices 8 up and down is guided by a guide rail 5 installed in the hoistway 1 and travels vertically on the hoistway 1. . In a high-stroke elevator, a compensator cable 12 is suspended and connected to a counterweight 9 and a weight 9 for compensating the load of the main rope 6. The tail cord 10 is attached to an intermediate connection box 11 provided at the bottom of the car 7 and the intermediate part of the hoistway 1. At this time, the left and right guide rails 5 and the tail cord 10 are generally arranged in parallel.

  Further, as shown in FIG. 6, the hanging member 15 of the tail cord 10 is attached to the car lower frame 13 with fastening bolts 14. At this time, it is necessary to secure a certain gap between the tail cord 10 and the guide rail 5 in consideration of the deflection of the tail cord 10 and the like. The dead weight of the tail cord 10 is applied to the car 7 as a suspension load. As the car 7 ascends from the lowermost floor to the uppermost floor of the hoistway 1, the suspension load by the tail cord 10 increases and becomes the maximum load on the uppermost floor.

  In recent years, high-rise buildings have been built up, and super high-rise buildings with an ascending / descending distance exceeding 400 m have been built one after another. For this reason, the suspension load by the tail cord 10 tends to increase in the future. In such a case, as shown in FIG. 7, the left and right guide rails 5 and the tail cord 10 are generally arranged in parallel. At this time, the eccentric load in the longitudinal direction generated in the car 7 is determined by the magnitude of the longitudinal moment generated in the car 7, and the deviation of the suspension load point caused by the guide rail core of the car 7 and the tail cord 10 is reduced to L. When the suspension load by the tail cord 10 is W and the moment generated in the car 7 is M, the relationship is M = W × L.

  Since the value of the suspension load W by the tail cord 10 is determined by the lifting process and the mass of the tail cord 10, the suspension by the guide rail core and the tail cord 10 of the car 7 is used to reduce the moment generated in the car 7. It is necessary to reduce the misalignment L of the load point. The same can be said about the laterally offset load generated in the car 7, but the moment in the front / rear and left / right directions generated in the car 7 is canceled by the moment generated by the compensator cable 12, and the offset load generated in the car 7 is reduced. It is common. However, if the moment on the tail cord 10 side is large, it is necessary to increase the moment on the compensation cable 12 side.

  For this reason, a method has been proposed in which the lateral load that occurs in the car 7 is reduced by moving the suspension position of the tail cord 10 between the lowermost floor and the uppermost floor (see, for example, cited document 1).

  Further, a method has been proposed in which the suspended load of the tail cord 10 that varies depending on the height position of the car 7 is reduced, and the unbalanced load generated in the car 7 is reduced by moving the balance weight (for example, cited document 2). reference).

Furthermore, by increasing the rigidity of the tail cord 10, the suspension interval of the tail cord 10 is increased, and by suspending the tail cord 10 at a position close to the center in the left and right direction of the car 7, the lateral load of the car 7 is reduced. A method has been proposed (see, for example, cited document 3).
JP-A-6-191762 JP 2004-75235 A JP-A-8-91734

  The increase in the unbalanced load generated in the car not only deteriorates the ride comfort due to increased vibration and noise when the car is running, but also the mounting members and fastening bolts that suspend the tail cord from the car bottom. Causes increase in size and mass.

In the cited documents 1 and 2, a drive device, a power source, a control device, and the like for moving the tail cord position and the balance weight are required, resulting in an increase in cost and mass.
Further, in the cited document 3, since a special tail code is used, the cost increases.

  An object of the present invention is to provide an elevator apparatus that can reduce the car load from the tail cord without adding a special apparatus.

To achieve the above object, the present onset bright, and hoistway, a pair of guide rails provided in the hoistway, a car which moves up and down along the guide rail suspended by the main rope, the Elevator apparatus comprising a car lower frame provided at the lower part of the car, a suspension member having one end attached to the car lower frame, and a tail cord having the other end connected to the intermediate part of the hoistway A plurality of tail cords , the plurality of tail cords are divided into two, and the car side end portion of the two divided tail cords is near the suspension core in the front-rear direction of the car and the car lateral centerline and with left and right guide rails hung so that the point symmetry positions with respect to a point of intersection of the straight line connecting the 2 cage-side end of the split tail code and its hoistway side of Connecting the section straight line, characterized in that the suspended obliquely forms a straight line and the angle which connects the pair of the guide rails of the car.

With this configuration. It is possible to reduce the longitudinal load generated in the car. In addition, it is possible to reduce the unbalanced load in the front-rear and left-right directions that occurs in the car when there are a plurality of tail cords.

Further, in this onset bright, characterized in that the hanging member of the tail code was attached to the top of the car sill.

  With this configuration, the car lower frame is structured to receive a load directly, so that the burden on the fastening bolt can be reduced and the size can be reduced.

Further, the present invention is characterized in that a car-side end portion of the tail cord is attached so as to be positioned at a central portion of the suspension member.

  With this configuration, the left and right bolts that attach the suspension member to the car lower frame are equally burdened, so that these bolts can be reduced in size.

  According to the present invention, it is possible to improve riding comfort such as vibration and noise during traveling by reducing the longitudinal load or the lateral displacement generated in the car.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view showing an elevator tail cord suspension structure according to one embodiment of the present invention, FIG. 2 is a schematic view of a car bottom suspension structure in FIG. 1, and FIG. 3 is an elevator tail according to another embodiment of the present invention. FIG. 4 is a schematic view of an elevator tail cord suspension structure according to another embodiment of the present invention.

  In FIG. 1, the car-side end of the tail cord 10 is hung near the guide rail core in the front-rear direction of the car 7, and the hoistway-side end is positioned to ensure a sufficient gap between the guide rail 5 and The flat tail cord 10 on the plane is suspended obliquely with respect to the center line connecting the left and right guide rails 5. As a result, the car side end of the tail cord 10 is located near the guide rail core, and it is possible to reduce the misalignment L of the suspension load point due to the guide rail core of the car 7 and the tail cord 10. The generated moment is reduced, and the unbalanced load generated in the front-rear direction generated in the car 7 can be reduced. The moment in the left-right direction is offset by the moment generated by the compensation cable 12.

  As shown in FIG. 2, by arranging the car side end portion of the tail cord 10 between the car lower frames 13, the tail cord suspension member 15 can be reduced in size and weight, and FIG. In this structure, the load of the bolt 14a is larger than that of the bolt 14b. However, in the embodiment shown in FIG. 2, the bolt 14a and the bolt 14b are equally loaded, so the bolt 14a for fastening the suspension member 15 to the car lower frame 13 is used. 14b can be miniaturized.

  In FIG. 3, generally, a high stroke elevator uses a plurality of tail cords. An increase in the number of tail cords means an increase in the unbalanced load on the car. Therefore, when a plurality of tail cords 10a, 10b have the same mass, L2 = L3, and when the masses are different, assuming that the suspension load and moment by the tail cords 10a, 10b are Wa, Wb, Ma, Mb, respectively, Ma = Wa The tail cords 10a and 10b are suspended at the L2 and L3 positions where xL2, Mb = Wb * L3, and Ma = Mb.

  With this configuration, it is possible to reduce the front / rear / left / right unbalanced load of the car 7 without relying on the compensation cable 12. In addition, it is possible to prevent interference between the tail cords by securing a gap between the plurality of tail cords 10a and 10b. Further, a plurality of tail cords 10a and 10b can be suspended near the guide rail core of the car 7, so that the tail cord suspension member 15 can be reduced in size and weight, and the fastening bolts 14a and 14b can be reduced in size.

  FIG. 4 shows a structure for attaching the tail cord suspension member 15 to the upper portion of the car lower frame 13. Although FIG. 6 shows a structure in which the fastening bolt 14a receives a tensile load, in this structure, the car lower frame 13 has a structure to receive a direct load, so that the burden on the fastening bolts 14a and 14b can be reduced and the size can be reduced. It becomes possible.

It is a top view which shows the elevator tail cord suspension structure which concerns on one Example of this invention. It is the schematic of the car bottom part suspension structure in FIG. It is a top view which shows the elevator tail cord suspension structure which concerns on the other Example of this invention. It is the schematic of the elevator tail cord suspension structure which concerns on the other Example of this invention. It is hoistway sectional drawing explaining the outline of the conventional elevator tail cord suspension structure. It is the schematic of the car bottom part suspension structure in FIG. It is a top view of the elevator tail cord suspension structure in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hoistway 2 Machine room 3 Hoisting machine 4 Control device 5 Guide rail 6 Main rope 7 Car 8 Guide device 9 Balance weight 10 Tail cord 11 Intermediate junction box 12 Compensation cable 13 Car cage lower frame 14 Fastening bolt 15 Suspension member

Claims (3)

A hoistway, a pair of guide rails provided in the hoistway, a car suspended by a main rope and going up and down along the guide rail, a car lower frame provided at the lower part of the car, In an elevator apparatus comprising a suspension member having one end attached to the car lower frame and a tail cord having the other end connected to an intermediate portion of the hoistway,
The tail cord is divided into a plurality of pieces, and the plurality of tail cords are divided into two, and the car-side end portions of the two divided tail cords are located in the vicinity of the suspension core in the front-rear direction of the car and to the left and right with the center line and hung so that the point symmetry positions with respect to a point of intersection of the straight line connecting the left and right guide rails, said two cage-side end of the split tail code and and its hoistway ends An elevator apparatus characterized in that a straight line formed is suspended at an angle with a straight line connecting the pair of guide rails of the car. The elevator apparatus according to claim 1, wherein the tail cord suspension member is attached to an upper part of a car lower frame at a car bottom . The elevator apparatus according to claim 1 or 2 , wherein a car-side end portion of the tail cord is attached so as to be positioned at a central portion of the suspension member .

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