JP2002179358A - Elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize an effective utilization of a hoistway space of an elevator. SOLUTION: The elevator device is provided with a car 2 lifting in the hoistway; counter weights 31, 32; a driving device 40 disposed at an upper part of the hoistway; a main shaft 43 driven by this driving device 40; traction sheaves 41, 42 fixed to this main shaft 43; main ropes 51, 52 of which one end is connected to one side part at a position lower than a ceiling of the car 2 and the other end is connected to the counter weight 31 through the traction sheave 41; and main ropes 53, 54 of which one end is connected to the other side part 21 at a position lower than the ceiling of the car 2 and the other end is connected to the counter weight 32 through the traction sheave 42. The traction sheaves 41, 42 and the driving device 40 are installed between an inner wall of the hoistway and a space generated by a plane of projection of the car 2 to a lifting direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traction type elevator apparatus.

[0002]

2. Description of the Related Art In a conventional elevator system, a car and a counterweight are connected 1: 1 by a main rope,
The counterweight was located on the side opposite to the entrance or exit of the car. Therefore, a useless space is formed near the four corners of the hoistway, and there is a problem that the hoistway space cannot be used effectively.

In order to effectively use the space of the hoistway, a structure in which the counterweight is divided into a plurality of parts has been considered. For example, JP-A-5-70058 describes an elevator apparatus having a structure shown in FIGS. 2 is a horizontal sectional view of the hoistway, FIG. 3 is a plan view showing the positional relationship between the car, the hoisting device and the deflecting wheel, and FIG. 4 is a diagram showing the positional relationship between the hoisting device and the deflecting wheel in the vertical plane. is there.

In the figure, 1 is a hoistway, 2 is a car, 3
Reference numerals 1 and 32 denote first and second counterweights, and reference numeral 4 denotes a hoisting device installed in a machine room formed at the uppermost portion of the hoistway 1, and includes a traction sheave 4A and an electric motor 4B. 5 is a plurality of main ropes.
52 connects the car 2 and the counterweight 31 via the traction sheave 4A and the deflector wheel 61, and 53,5
4 is a traction sheave 4A and deflector wheels 61, 62, 6
The car 2 and the counterweight 32 are connected to each other via the reference numeral 3. 7 is a guide rail of car 2, 81 and 82 are guide rails of counterweights 31 and 32, respectively.
9 is a landing.

As described above, since the counterweight can be reduced by dividing the counterweight into two, even if the horizontal sectional area of the hoistway 1 is small, the car 2
And counterweights 31 and 32 in the gap between the
Can be arranged.

[0006]

The conventional elevator apparatus has a problem that a machine room must be formed at the top of the hoistway 1. Further, without forming the machine room, the hoisting device 4 and a large number of deflecting wheels 61 are provided immediately above the car 2.
As a result, a large space is required above the hoistway 1.

[0007]

SUMMARY OF THE INVENTION The present invention relates to an elevator apparatus having a structure in which a plurality of counterweights are connected to a single car, wherein a driving device and a plurality of traction sheaves are connected to each other at an upper portion of the hoistway. The traction sheave is installed between the vehicle and a space defined by a projection plane of the car in the elevating direction, and each traction sheave is mounted on a main shaft driven by a driving device.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. In the figure, reference numeral 40 denotes a drive unit, and 41 and 42 denote first and second traction sheaves, which are fixed to a main shaft 43 driven by the drive unit 40. 44 is a bearing. Among them, the driving device 40, the traction sheaves 41 and 42, and the bearing 44 are installed between the inner wall of the hoistway 1 and the space defined by the projection surface of the car 2 in the elevating direction, and the projection surface of the car 2 Since only the main shaft 43 at a relatively high position is at the top,
The car 2 can be raised to a higher position, and the distance between the car 2 and the ceiling surface of the hoistway 1 can be reduced. Further, since the connecting portion (rope hitch portion) 21 of the main ropes 51 to 54 to the car 2 is arranged at a low position on the side of the car 2, the upper dimension of the hoistway 1 can be further reduced.

According to the present embodiment, complicated roping using a large number of deflecting vehicles as in the prior art is not required, and the distance between the car 2 and the ceiling surface of the hoistway 1 can be reduced. In addition to reducing the horizontal cross-sectional area of the hoistway 1, the vertical space of the hoistway 1 can be reduced.

[0010]

As described above, according to the present invention,
In addition to the space saving in the horizontal section of the hoistway, the space saving in the vertical direction of the hoistway can be realized, and the hoistway space can be effectively used.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a horizontal sectional view of a hoistway of a conventional elevator apparatus.

FIG. 3 is a plan view showing a positional relationship among a car, a hoisting device, and a deflector of a conventional elevator device.

FIG. 4 is a diagram showing a positional relationship between a hoisting device and a deflector in a vertical plane of a conventional elevator device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hoistway 2 Car 32, 32 Counterweight 40 Drive 41, 42 Traction sheave 43 Main shaft 51, 52, 53, 54 Main rope

Claims (1)

[Claims] 1. A vehicle for ascending and descending in a hoistway,
Counterweights and one placed at the top of the hoistway
Drive unit, a main shaft driven by the drive unit, two traction sheaves fixed to the main shaft, and one end of one side of the car below the ceiling of the car. A main rope connected to the car and having the other end connected to one of the counterweights via one of the traction sheaves, and one end connected to the car at another side below the ceiling of the car; A main rope connected at the other end to the other one of the counterweights via the other one of the traction sheaves, wherein the traction sheave and the drive unit project the hoistway inner wall and the car in the elevating direction. An elevator apparatus characterized by being installed between a surface and a space.