CN-115701411-B - Multi-car elevator

CN115701411BCN 115701411 BCN115701411 BCN 115701411BCN-115701411-B

Abstract

The invention provides a multi-car elevator capable of inhibiting abrasion and damage of a main sling. A multi-car elevator is provided with a plurality of cars which circulate in a hoistway, a fastener provided to the cars, and a hoist (5A) having sheaves (39 a) for winding the main slings (13A, 14A) and connected to the cars via the fastener. The fastener has a roller portion (29) that contacts the sheave (39 a) when the car is reversed by the hoist (5A).

Inventors

An Bugui
HIROAKI NAOAKI
DOZONO YOSHIHIRO
Song Jiadajie

Assignees

株式会社日立制作所

Dates

Publication Date: 20260512
Application Date: 20220729
Priority Date: 20210802

Claims (3)

1. A multi-car elevator, wherein, The multi-car elevator comprises: A plurality of cars that circulate in the hoistway; a fastener provided to the car; A main sling connected to the car via the fastener, and A hoist having a sheave around which the main hoisting rope is wound, The fastener has: a roller portion which contacts the sheave when the car is reversed by the hoist, and A pulley for the main hoist rope to be reeled, The radius of the roller portion is set to be larger than the radius of the pulley, The car has: a connecting shaft for mounting the pulley and the roller, and A coupling member rotatably supporting the coupling shaft, An attitude maintaining roller for maintaining the attitude of the fastener is provided at the fastener.
2. The multi-car elevator of claim 1, wherein, A holding roller bracket is fixed on the connecting shaft, The attitude maintaining roller is rotatably supported by the maintaining roller bracket, An attitude maintaining guide rail contacting with the attitude maintaining roller is arranged on the lifting channel in an upright manner.
3. A multi-car elevator, wherein, The multi-car elevator comprises: A plurality of cars that circulate in the hoistway; a fastener provided to the car; A main sling connected to the car via the fastener, and A hoist having a sheave around which the main hoisting rope is wound, The fastener has: a roller portion which contacts the sheave when the car is reversed by the hoist, and A plurality of pulleys for winding the main hoist rope, A plurality of main slings are connected to the fastener, The roller portion is disposed between the plurality of pulleys.

Description

Multi-car elevator Technical Field The present invention relates to a multi-car elevator in which a plurality of cars move in a single hoistway. Background In recent years, there has been proposed a circulating type multi-car elevator in which a car is not only moved up and down in a straight line, but also the moving direction of the car is reversed from up to down, and the moving direction is continuously changed. As a conventional multi-car elevator of this type, there is a multi-car elevator described in patent document 1, for example. Patent document 1 describes that a circulating loop is formed by two parallel main ropes wound around a driving wheel and a driven wheel to form a loop having an ascending portion, a descending portion, and an upper and lower horizontal portions, and a car rotatably attached to a linking beam connected between the two main ropes. Patent document 1 describes that a plurality of sets of circulation loops are formed, a drive wheel and a driven wheel are supported coaxially at respective positions, a drive source for independently driving the drive wheel is provided for each circulation loop, a car is circulated in one direction, and a coupling beam is coupled to a main rope at a position separated from outer peripheral edges of the drive wheel and the driven wheel. Prior art literature Patent literature Patent document 1 Japanese patent laid-open No. 8-26629 However, in the technique described in patent document 1, when the car is reversed by the pulley, the main rope is sandwiched between the car and a fastener connecting the main rope, the pulley, and the sheave of the hoist. As a result, in the technique described in patent document 1, the main slings are caught, and there is a possibility that abrasion and breakage may occur in the main slings, and there is a problem that the life of the main slings is reduced. Disclosure of Invention Problems to be solved by the invention The present invention has been made in view of the above-described problems, and an object thereof is to provide a multi-car elevator capable of suppressing wear and tear of a main sling. Means for solving the problems In order to solve the above problems and achieve the object, a multi-car elevator includes a plurality of cars that circulate in a hoistway, a fastener that is provided to the cars, a main rope that is connected to the cars via the fastener, and a hoist that has a sheave on which the main rope is wound. The fastener has a roller portion that contacts the sheave when the car is reversed by the hoist. Effects of the invention According to the multi-car elevator with the above structure, abrasion and breakage of the main sling can be suppressed. Drawings Fig. 1 is a schematic configuration diagram of a multi-car elevator according to a first embodiment. Fig. 2 is a plan view showing a group of cars of the multi-car elevator of the first embodiment example. Fig. 3 is a plan view showing other groups of cars of the multi-car elevator of the first embodiment example. Fig. 4 is a cross-sectional view showing a hoist unit in a multi-car elevator of the first embodiment example. Fig. 5 is a cross-sectional view showing a hoist in a multi-car elevator of the first embodiment example. Fig. 6 is a view showing a state in which a fastener of the multi-car elevator according to the first embodiment is installed in a car. Fig. 7 is a side view showing a fastener of the multi-car elevator of the first embodiment example. Fig. 8 is a cross-sectional view showing a fastener of the multi-car elevator of the first embodiment example. Fig. 9 is a diagram showing a state of a hoist and a fastener immediately before a car of the multi-car elevator of the first embodiment is reversed from a rising movement to a falling movement Fig. 10 is a sectional view taken along line A-A of the rotary body in the state of fig. 9. Fig. 11 is a view showing a state in which a main suspension rope is wound around the rotating body shown in fig. 9 in a sectional view taken along line A-A. Fig. 12 is a cross-sectional view showing a sheave of the hoist in the state of fig. 9. Fig. 13 is a diagram showing an initial state in which a fastener in the multi-car elevator of the first embodiment climbs over a sheave of the hoist. Fig. 14 is a diagram showing a state in which a fastener in the multi-car elevator of the first embodiment climbs over the sheave of the hoist at about 90 degrees. Fig. 15 is a cross-sectional view of the rotating body and the sheave in the state of fig. 14. Fig. 16 is a front view showing a fastener in the multi-car elevator of the second embodiment example. Fig. 17 is a side view showing a fastener in a multi-car elevator of the second embodiment example. Fig. 18 is a schematic configuration diagram of a multi-car elevator according to a third embodiment. Fig. 19 is a cross-sectional view showing a hoist unit of a multi-car elevator of the third embodiment example. Reference numerals illustrate: A lifting