JP2007284224A - Elevator device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator device capable of suppressing reduction of the service life of a main rope even when diameter of a driving sheave is reduced. <P>SOLUTION: In this elevator device using a hoisting machine 10 having the driving sheave 9 having diameter 29 or less times as large as that of the main rope 5 and provided with sheaves 7a, 7b, 12a at least in a car 1 and on a balance weight 2, diameter of the sheaves 7a, 7b, 12b provided in the car 1 and on the balance weight 2 is set to be larger than the diameter of the driving sheave 9. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an elevator apparatus including a car that moves up and down in a hoistway.

  Conventionally, a car and a counterweight are connected by a main rope, and the main rope is wound around a drive sheave via a turn sheave, a cage and a counterweight sheave, and driving the drive sheave In an elevator device that raises and lowers the counterweight, the diameter of the drive sheave and sheave can be 40 times larger than the diameter of the main rope in order to reduce damage to the main rope due to friction drive and to reduce bending resistance. Although it was common, recently, those using synthetic fibers such as aramid and kepler with improved bending performance, and main ropes combining steel wire and urethane resin etc. were devised for long life, Even if the diameter of the drive sheave or sheave is less than 30 times the diameter of the main rope, the one in which the life of the main rope is extended or the one having improved bending performance is being made.

  However, some main ropes designed to prolong life lack flexibility, and some main ropes designed for flexibility have a short life span, and it is necessary to compensate for these shortcomings. ing.

One solution to this problem is to increase the winding angle of the main rope around the drive sheave in order to reduce the diameter of the drive sheave and obtain driving force. A device that is as small as a sheave has been proposed (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 58-117476

  In the proposed prior art described above, only the drive sheave is reduced, and the improvement in the performance of the entire elevator is not considered.

  An object of the present invention is to provide an elevator apparatus that can suppress a decrease in the life of a main rope as much as possible even when the diameter of a drive sheave is reduced.

  In order to achieve the above object, the present invention uses a hoisting machine having a drive sheave having a diameter of 29 times or less of the main rope diameter, and includes at least a car and a counterweight with a sheave. The diameter of the sheave provided on the counterweight is larger than the diameter of the drive sheave.

  With this configuration, the bending stress to the main rope and the bending resistance of the main rope can be reduced, so the life extension effect and energy saving effect of the main rope can be expected, and the hoisting machine can be downsized by reducing the diameter of the drive sheave. Can be used effectively, and can be expected to improve the installation margin and maintainability of the hoisting machine.

  According to the present invention, the diameter of the sheave of the car and the counterweight is made larger than the diameter of the drive sheave, so that the bending stress to the main rope and the bending resistance of the main rope can be reduced. The energy saving effect can be expected, and the size of the hoisting machine can be reduced by reducing the diameter of the drive sheave, so that the space can be effectively utilized, and the hoisting machine installation tolerance and maintainability can also be expected.

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

  1 is a perspective view showing an embodiment of the elevator apparatus of the present invention, FIG. 2 is a plan view of FIG. 1 viewed from above, FIG. 3 is a perspective view showing another embodiment of the elevator apparatus of the present invention, FIG. Fig. 5 is a plan view of Fig. 3 as viewed from above, Fig. 5 is a perspective view of still another embodiment of the elevator apparatus of the present invention, and Fig. 6 is a plan view of Fig. 5 as viewed from above.

  In FIG. 1, a car side main clasp 3 is installed on the side upper part of the car 1, the main rope 5 extends downward from the car side main clasp 3, and another car sheave 7b is moved from the car sheave 7a. After that, the driving sheave 9 installed on the upper part of the car 1 is reached, and the main rope 5 is wound around the driving sheave 9 by about 180 degrees and extends downward again, and the counterweight is attached to the counterweight 2. It is configured so as to reach the upper counterweight side main clasp 14 via the vehicle 12a.

  The overall arrangement of the present invention will be described with reference to FIG. 2. An example in which the trunk hoisting machine 10 is arranged above the car 1 and the direction change sheave for connecting the car 1 and the counterweight 2 is not used. The counterweight 2 is installed on the side of the car 1. Here, for example, when using the main rope 5 in which the steel wire is coated with the resin, the friction coefficient between the drive sheave 9 and the main rope 5 is compared with the case where the main rope only using the steel wire without the resin coating is used. In order to improve, the diameter of the drive sheave 9 can be reduced, and as a result, the hoisting machine 10 can be reduced in size. However, when the diameter of the drive sheave 9 is reduced, the local stress on the main rope 5 increases, so that it is necessary to take measures such as increasing the hardness of the resin in order to extend the life of the resin-coated main rope 5. By using the main rope 5 with the increased hardness of the resin, the diameter of the drive sheave 9 can be reduced, and at the same time, the required driving torque and braking torque are reduced, so that the equipment can be downsized. As a result of the downsizing, the space around the hoisting machine 10 is increased, so that the maintainability is improved.

  On the other hand, if the car sheaves 7a, 7b and the counterweight sheaves 12a are also reduced in size, the bending resistance for winding the main rope 5 around the sheaves 7a, 7b and the counterweight sheaves 12a increases, and the elevator The running loss of the vehicle will increase. Further, when the car sheaves 7a and 7b and the counterweight sheave 12a are reduced in diameter, the local stress of the main rope increases, leading to a reduction in the life of the main rope 5. Therefore, the car sheaves 7a, 7b and / or the counterweight sheaves 12a are made larger as necessary with respect to the drive sheave 9 so that the bending resistance and the life of the main rope are within an allowable range, so that the entire elevator is improved. The installation efficiency of the hoisting machine 10 in the space can be increased without greatly changing the configuration.

  At this time, the object can be achieved by making the diameter of the sheave larger than the diameter of the drive sheave 9, but if possible, the diameter of the sheave can be made more stable by 1.5 times the diameter of the drive sheave. The life of the main rope can be improved.

  The diameter of the drive sheave 9 is 29 times or less that of the main rope 5, but 16 to 29 times or less is optimal. This is because if it is 16 times or less, the local resistance increases, and it is impossible to expect a reduction in life.

  Furthermore, if a resin-coated wire rope or Kepler or aramid resin is used as the main rope 5, the flexibility can be increased, and the diameter of the drive sheave 9 can be extremely easily reduced to 29 times or less than the main rope 5. .

  Next, another embodiment will be described with reference to FIGS. In FIG. 3, a car side main clasp 3 is installed on the upper side of the car 1, the main rope 5 extends downward from the car side main clasp 3, and another car sheave 7b is connected to the car sheave 7a. After that, it passes through the car side direction change sheaves 8a and 8b installed at the upper part of the car 1 and extends downward again to the driving sheave 9, and the main rope 5 is wound around the driving sheave 9 by about 180 degrees. From the upper counterweight side change sheave 11 to the counterweight sheaves 12a, 12b installed on the lower counterweight 2, and finally to the upper counterweight side main clasp 14 It is composed of.

  4, the difference from FIG. 2 is that the car side direction change sheaves 8a and 8b are arranged between the car 1 and the drive sheave 9, and that the thin hoisting machine 10A is installed below the hoistway. A counterweight side change sheave 11 is arranged between the drive sheave 9 and the counterweight 2, and two sheaves 12 a, 12 b are provided on the counterweight sheave so that the counterweight 2 can be moved. It is the point installed behind 1.

  By configuring in this way, the tolerance of the arrangement of the counterweight 2 is increased, and it becomes possible to improve the installation efficiency in the hoistway, but compared with the embodiment of FIGS. As the number increases, the problems of bending resistance and main rope life become prominent. Therefore, in the embodiment of FIGS. 3 and 4, at least all of the sheaves 7a, 7b, 12a, 12b of the counterweight 2 and the other weight change sheaves 8a, 8b, 11 or the majority of the sheaves 7a, 7b, 12a, 12b. By making the diameter larger than the diameter of the drive sheave, the same effect as the embodiment shown in FIGS.

  Next, still another embodiment will be described with reference to FIGS. In FIG. 5, the main rope 5 extends upward from the car main rope stopper 3 installed on the floor of the car 1 via the main rope return wheel 4, and the car 1 ceiling from the car upper turning sheaves 6 a and 6 b. After passing through the car sheave 7a, the car side direction change sheave 8a installed on the upper part of the car 1 extends to the drive sheave 9, and the main rope 5 is wound around the drive sheave and then the lower counterweight. 2 through the counterweight sheave 12a provided at 2 and again to the counterweight sheave 13 at the upper part of the hoistway, and finally to the counterweight side counter 14 of the counterweight 2 It is.

  In FIG. 6, in FIG. 4, roping, which is a method of hanging the main rope, is 2: 1, whereas the roping is 3: 1 and the hoisting machine 10 having a trunk length is installed above the car 1. This is a very different point. With this configuration, even when the diameter of the drive sheave 9 is the same as that in FIG. 4, the drive torque and the braking torque can be reduced, so that a smaller hoisting machine can be achieved. Thus, although there are many elevator configurations, in any case, expect the same effect as the previous embodiment by making the sheave other than the drive sheave larger than the diameter of the drive sheave under the conditions described above. Can do.

It is a perspective view which shows one Embodiment of the elevator apparatus of this invention. It is the top view which looked at FIG. 1 from upper direction. It is a perspective view which shows other embodiment of the elevator apparatus of this invention. FIG. 4 is a plan view of FIG. 3 viewed from above. It is a perspective view which shows other embodiment of the elevator apparatus of this invention. FIG. 6 is a plan view of FIG. 5 viewed from above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car 2 Balance weight 3 Car side main rope stopper 4 Main rope return wheel 5 Main rope 6a, 6b Car upper direction change sheave 7a, 7b Car sheave
8a, 8b Car side direction change sheave 9 Driving sheave 10 Body length hoisting machine 10A Thin hoisting machine 11 Counterweight side direction change sheave 12a, 12b Counterweight sheave 13 Counterweight upper direction change sheave 14 Counterweight Side main clasp 15a, 15b Car guide rail 16a, 16b Counterweight guide rail

Claims (5)

In an elevator apparatus using a hoisting machine having a drive sheave having a diameter of 29 times or less of the main rope diameter, and having a sheave on at least a car and a counterweight,
An elevator apparatus characterized in that a diameter of a sheave provided on the car and the counterweight is larger than a diameter of the drive sheave.   The elevator apparatus according to claim 1, wherein a diameter of the sheave is 1.5 times or more of a diameter of the drive sheave.   The elevator apparatus according to claim 1, wherein the hoisting machine is disposed in a hoistway as a thin hoisting machine.   The elevator apparatus according to claim 1, wherein the hoisting machine is disposed in a hoistway as a trunk hoisting machine. The elevator apparatus according to claim 1, wherein a resin-coated wire rope, Kepler or aramid resin is used as the main rope.

Images