JP2008207939A - Rope type elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To dispense with an installation space of a new adjustment weight in an elevator shaft and to suppress unbalanced load applied to a guide device in a front/back surface direction and a side surface direction without increasing the weight of the car in balance adjustment of the car of the rope type elevator having a balance weight. <P>SOLUTION: Pulleys 8a, 8b, 8c, 8d are provided above the car 1 and above the balance weight 2 at a top part of the elevator shaft, and auxiliary ropes 12a, 12b are wrapped around the pulleys 8a, 8b, 8c, 8d. One end is connected to a position for canceling the unbalanced load of the car 1 and the other end is connected to the balance weight 2. Two pairs or more of connection mechanisms of the car 1 and the balance weight 2 constituted by a separate route from the main rope 4 are constituted, and tension adjustment mechanisms are provided in each of the two pairs or more of the connection mechanisms, respectively. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rope type elevator having a counterweight.

  In a typical elevator, for example, a car and a counterweight are connected by a main rope, and the middle of the main rope is suspended by a hoist installed above the hoistway, and the hoist rotates. Thus, there is a configuration in which the car provided with the guide device moves up and down along the guide rail.

  In such an elevator, the door and the door driving device are arranged on the entrance / exit side, so that the center of gravity of the car is biased toward the entrance / exit side. As a result, the center of gravity of the car and the suspension core of the main rope do not match, and the rotational moment generated by the difference adds an unbalanced load to the guide device, greatly affecting the ride comfort and extending the life of the guide device. It was shortened. Therefore, conventionally, an adjustment weight is installed in the lower part of the car on the side opposite to the entrance and exit to adjust the balance of the car.

Moreover, as a device of this type, particularly in a hydraulic elevator, a pulley is provided above the vicinity of the rear wall of the hoistway, and one end of the auxiliary rope wound around the pulley is connected to the guide device by a hydraulic jack via the main rope. A method is known in which the balance of the car is adjusted by connecting to a portion that acts to cancel the applied unbalanced load and providing a counterweight at the other end of the auxiliary rope located on the rear wall (see Patent Document 1). ).
Japanese Patent Laid-Open No. 5-13962 (paragraph 0006, FIG. 1)

  The method of adding an adjustment weight to the opposite side of the car and canceling out the unbalanced load has the problem of increasing the car weight.For example, in the repair of an elevator, the existing car is repaired with an increase in the car weight. If the car balance is unbalanced, attaching an adjustment weight to the car will exceed the allowable load on the guide rail, and the elevator may not be repaired.

  On the other hand, the method of providing a new adjustment weight by providing a pulley above the hoistway requires a space for installing the adjustment weight in the hoistway, which is an unfavorable factor in recent years where space saving is required. In addition, an existing elevator that does not have a space for adding an adjustment weight is not a realistic method because this method cannot be used.

  In general, the balance adjustment of the elevator car needs to be adjusted not only in the front / rear direction of the car but also in the lateral direction perpendicular to the front / rear direction. The newly provided method can handle only one direction. An object of the present invention is to eliminate the need for an installation space for adjusting weights in the hoistway without increasing the weight of the car, and to suppress the unbalanced load applied to the guide devices in the front and back directions.

  The above problem is that two or more pulleys are provided above the car at the top of the hoistway and above the counterweight, and an auxiliary rope is wrapped around this pulley, and one end is assisted to cancel the eccentric load of the car The ropes are connected, the other end is connected to a counterweight, and two or more sets of connecting mechanisms for the carriage and the counterweight, which are configured by paths different from the main rope, are provided. Each of the two or more sets of connecting mechanisms This is achieved by providing a tension adjusting mechanism in

  Connecting the auxiliary rope to the existing counterweight in the rope type elevator eliminates the need for a new adjustment weight installation space. In addition, the tension adjustment mechanism is connected to the auxiliary rope that connects the counterweight and the counterweight to the counterweight. Since the position where the unbalanced load of the car is applied is raised upward, it is not necessary to add a new adjustment weight accompanying an increase in the car weight. In addition to this, by providing two or more sets of tension adjusting mechanisms, balance adjustment can be performed also in the lateral direction of the car.

  Since there is no need for installation space for new adjustment weights, not only can the space be saved, but there is no additional weight of the car, so existing elevators that could not be refurbished due to weight restrictions so far can be used. In contrast, the balance of the car can be adjusted. Furthermore, since two or more tension adjusting mechanisms are provided, it is possible to adjust the balance in the lateral direction and flexibly cope with subsequent changes in the car weight in the repair of the elevator.

  Embodiments of the present invention will be described below with reference to the drawings. 1 is a side view showing a schematic configuration of a rope type elevator according to an embodiment of the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is a top view of FIG. 1, and FIG. -A shows a cross-sectional view. The upper part of the car 1 is connected to one end of the main rope 4, and the other end of the main rope 4 is connected to the upper part of the counterweight 2. The middle of the main rope 4 is suspended by a hoisting machine 3 installed above the hoistway. When the hoisting machine 3 rotates, the car 1 and the counterweight 2 are And the main rope 4 are moved up and down by a frictional force. Guide devices 5A and 5B comprising guide rollers 5a, 5b, 5c and 5d are provided at the upper and lower ends of the car 1, and the guide devices 5A and 5B are engaged with the guide rail 6a. , Guide the travel of the car 1.

  On the other hand, four attachment pieces 7a, 7b, 7c, 7d taken out from the guide rails 6a, 6b, 6c, 6d are attached above the car 1 and the counterweight 2 in the hoistway, and each has a pulley 8a. , 8b, 8c, and 8d. Further, take-out pieces 9a and 9b taken out to the entrance side are attached to the upper portion of the car 1, and an attachment piece 10 is fixed to the end portions of the take-out pieces 9a and 9b. Jack bolts 11a, 11b, 11c and 11d are fixed to the mounting piece 10, and connecting plates 13a and 13b for connecting the auxiliary ropes 12a and 12b are fixed to the lower portions of the jack bolts 11a, 11b, 11c and 11d. ing. After one end of the auxiliary ropes 12a and 12b is fixed to the connecting plates 13a and 13b, and then wound around the pulleys 8a and 8b above the car 1, and further wound around the pulleys 8c and 8d above the counterweight 2. , Connected to the upper part of the counterweight 2.

  In general, a rope type elevator is provided with a door 14 and a door driving device 15 on the doorway side, so that the center of gravity of the car 1 is biased toward the doorway side. As a result, the center of gravity of the car 1 and the suspension core of the main rope 4 do not coincide with each other, and an unbalanced load is applied to the guide rollers 5a and 5d due to the counterclockwise rotational moment generated from the difference. However, since the auxiliary ropes 12a, 12b described above are connected to the attachment piece 10 via the take-out pieces 9a, 9b taken out to the entrance / exit side, a clockwise moment acts on the car 1, and the guide rollers 5a, Uneven load applied to 5d is suppressed.

  Moreover, since the tension | tensile_strength of auxiliary rope 12a, 12b can be finely adjusted by changing the attachment height of connecting plate 13a, 13b with which auxiliary rope 12a, 12b is connected, the weight of the passenger car 1 is an elevator. Even if it changes due to renovation, etc., it can be handled easily.

  Furthermore, since there are two sets each of the connecting mechanism consisting of the auxiliary ropes 12a and 12b and the adjusting mechanism consisting of the connecting plates 13a and 13b, for example, even when an unbalanced load is applied only to the guide devices 5A and 5C, The balance of the car can be adjusted by individually adjusting only the auxiliary rope 12a side.

  The schematic configuration of a rope type elevator in another embodiment of the present invention is the same as that shown in FIGS. 1, 2, and 3 shown in the above embodiment, and the same reference numerals are given and description thereof is omitted, and only differences will be described. FIG. 5 is a cross-sectional view taken along the line BB of FIG. 1 and shows a schematic view of a tension adjusting mechanism which is a difference. In this embodiment, the adjustment weights 16a and 16b are built in the counterweight 2, and the drop-off prevention metal fitting 17 is attached to the upper part of the adjustment weights 16a and 16b. Further, one end of each of the auxiliary ropes 12a and 12b is connected to each of the adjustment weights 16a and 16b, and the other end of each of the auxiliary ropes 12a and 12b is fixed to the mounting piece 10 of the car 1.

  As a result, the adjustment weights 16a and 16b are hung only by the auxiliary ropes 12a and 12b, so that the adjustment weights 16a and 16b can freely move up and down, and the weights of the adjustment weights 16a and 16b do not fluctuate. work. Further, by changing the number of adjusting weights 16a and 16b, the balance of the car 1 can be easily readjusted even if the weight of the car 1 fluctuates, and two sets of adjusting weights 16a and 16b are provided. Therefore, the balance can be individually adjusted even if the uneven load is biased toward the guide devices 5A and 5c, as in the above embodiment.

It is a side view showing a schematic structure of a rope type elevator in an embodiment of the present invention. It is a front view of FIG. FIG. 2 is a top view of FIG. 1. It is AA sectional drawing of FIG. 1, and is the schematic of the tension adjustment mechanism in one Embodiment of this invention. It is BB sectional drawing of FIG. 1, and is the schematic of the tension adjustment mechanism in other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car 2 Balance weight 3 Hoisting machine 4 Main rope 5a, 5b, 5c, 5d Guide roller 5A, 5B, 5C, 5D Guide device 6a, 6b, 6c, 6d Guide rail 7a, 7b, 7c, 7d Mounting piece 8a , 8b, 8c, 8d Pulley 9a, 9b Carry-out piece 10 Mounting piece 11a, 11b, 11c, 11d Jack bolt 12a, 12b Auxiliary rope 13a, 13b Connecting plate 14 Door drive device 15 Door 16a, 16b Adjusting weight 17 Drop prevention bracket

Claims (3)

  A car that moves up and down along the guide rail installed in the hoistway, a counterweight that balances the weight of the car, a main rope that connects one end to the car and the other end to the counterweight, A rope-type elevator comprising a hoisting machine that suspends a main rope in a machine room disposed above a hoistway and lifts a car and a counterweight with frictional force, and the counterweight and the counterweight at the top of the hoistway There are two or more pulleys above each, and an auxiliary rope is wound around this pulley, one end is connected to a position where the offset load of the car is canceled, and the other end is connected to a counterweight. A rope type elevator characterized in that there are two or more connecting mechanisms for connecting a carriage and a counterweight constituted by a route different from the rope.   The rope type elevator according to claim 1, wherein an auxiliary rope in a connecting mechanism of a carriage and a counterweight constituted by a route different from the main rope is provided via a tension adjusting mechanism.   The balance weight side end of the auxiliary rope in the linkage mechanism of the carriage and the balance weight, which is configured separately from the main rope, is connected to the adjustment weight built in the balance weight, and this adjustment weight is provided vertically. The rope type elevator according to claim 1.

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