CN-122029121-A - Elevator with a motor

CN122029121ACN 122029121 ACN122029121 ACN 122029121ACN-122029121-A

Abstract

The elevator includes a car, a load-bearing beam, a hoisting machine having a sheave, a counterweight, a lower sheave, and main ropes. When the hoistway is viewed from above, the load beam is disposed between the rear surface portion of the car and the rear side wall surface of the hoistway. The traction machine is arranged on the spandrel girder. The balance weight moves up and down below the spandrel girder. The lower pulley is rotatably suspended from the spandrel girder via a lower pulley support table. The main rope is wound around a car-side sheave provided in the car, a lower sheave, a sheave of the hoisting machine, and a counterweight-side sheave provided in the counterweight. The lower sheave is disposed so that its axial direction is inclined with respect to the axial direction of the sheave of the hoisting machine.

Inventors

TORII KOTARO
NISHINO KATSUNORI
TASHIRO MAKI

Assignees

株式会社日立制作所

Dates

Publication Date: 20260512
Application Date: 20231016

Claims (8)

1. An elevator, characterized by comprising: A car which moves up and down in the up-down passage; a load beam disposed between a rear surface portion of the car and a rear side wall surface of the hoistway when the hoistway is viewed from above; A traction machine provided on the load beam and having a sheave; A balance weight which moves up and down in the vertical direction of the load beam; A lower pulley rotatably suspended from the load beam via a lower pulley support table, and A main rope wound around a car-side sheave provided in the car, the lower sheave, the sheave of the hoisting machine, and a counterweight-side sheave provided in the counterweight, The lower sheave is disposed so that an axial direction thereof is inclined with respect to an axial direction of the sheave of the hoisting machine.
2. Elevator according to claim 1, characterized in that, The center of gravity of the hoisting machine is disposed on a line connecting the center of gravity of the lower sheave and the center of gravity of the counterweight.
3. Elevator according to claim 2, characterized in that, Comprises a counterweight-side rail disposed below the load beam and slidably supporting the counterweight, A line connecting the center of gravity of the hoisting machine and the center of gravity of the lower sheave is disposed in the rail flange surface of the counterweight-side rail.
4. Elevator according to claim 1, characterized in that, The counterweight-side sheave is disposed so that an axial direction thereof is inclined with respect to an axial direction of the sheave of the hoisting machine.
5. The elevator of claim 4, wherein, The counterweight-side sheave is disposed so as to incline in a direction different from the lower sheave with respect to an axial direction of the sheave of the hoisting machine.
6. Elevator according to claim 1, characterized in that, An end of the lower sheave opposite to the hoisting machine is disposed closer to the rear side wall surface of the lifting passage than an end of the hoisting machine side.
7. Elevator according to claim 1, characterized in that, Comprising a top sheave for winding the main rope, The top sheave is disposed in a space between a side surface portion of the car perpendicular to the rear surface portion and a side wall surface of the hoistway when the hoistway is viewed from above.
8. The elevator of claim 7, wherein, The top sheave is disposed so that an axial direction thereof is orthogonal to an axial direction of a sheave of the hoisting machine.

Description

Elevator with a motor Technical Field The present invention relates to an elevator. Background Conventionally, an elevator includes a car, a counterweight, a hoisting machine, and a main rope. In addition, there is proposed a 2:1 roping ratio type elevator in which a car is provided with a car-side sheave around which a main rope is wound, and a counterweight-side sheave around which the main rope is wound is provided with a counterweight. Such elevators are provided with a top sheave and a lower sheave in the hoistway, which retrace the direction of the main ropes. As such an elevator, for example, an elevator described in patent document 1 is known. Patent document 1 describes that the hoisting machine is disposed in a straight line in which the center points of the sheaves connect the center points of the pair of counterweight-side rails. In addition, it is described that the lower return wheel is disposed outside the balance weight on the back side of the balance weight side rail, and partially overlaps the balance weight when the balance weight is positioned at the uppermost position, as viewed in the horizontal direction. Prior art literature Patent literature Patent document 1 Japanese patent laid-open publication 2016-26976 Disclosure of Invention Problems to be solved by the invention The center of gravity of the hoisting machine is located at a position offset from the center of the sheave. Therefore, in the technique described in patent document 1, the center of gravity of the lower sheave and the center of gravity of the hoisting machine are shifted, and thus the load applied to the load bearing beam supporting the hoisting machine and the lower sheave is twisted. In the technique described in patent document 1, it is necessary to design the load beam in consideration of the torsional load. As a result, the technique described in patent document 1 has a problem in that the size of the spandrel beam for supporting the hoisting machine and the lower sheave is increased. In view of the above problems, an object of the present invention is to provide an elevator in which the size of a load beam can be suppressed from increasing. Means for solving the problems In order to solve the above problems, an elevator includes a car that moves up and down in a hoistway, a load bearing beam, a hoisting machine having a sheave, a counterweight, a lower sheave, and a main rope. When the hoistway is viewed from above, the load beam is disposed between the rear surface portion of the car and the rear side wall surface of the hoistway. The traction machine is arranged on the spandrel girder. The balance weight moves up and down below the spandrel girder. The lower pulley is rotatably suspended from the spandrel girder via a lower pulley support table. The main rope is wound around a car-side sheave provided in the car, a lower sheave, a sheave of the hoisting machine, and a counterweight-side sheave provided in the counterweight. The lower sheave is disposed so that its axial direction is inclined with respect to the axial direction of the sheave of the hoisting machine. Effects of the invention According to the elevator with the above structure, the bearing beam can be prevented from being enlarged. Drawings Fig. 1 is a schematic configuration diagram showing an elevator according to a first embodiment. Fig. 2 is a schematic configuration diagram of an elevator according to the first embodiment, as viewed from a direction different from that of fig. 1. Fig. 3 is a plan view showing an elevator according to a first embodiment. Fig. 4 is a schematic configuration diagram showing an elevator according to a second embodiment. Fig. 5 is a schematic configuration diagram of an elevator according to a second embodiment, as viewed from a direction different from that of fig. 4. Fig. 6 is a plan view showing an elevator according to a second embodiment. Fig. 7 is a plan view showing an elevator according to a third embodiment. Detailed Description An example of an embodiment of an elevator will be described below with reference to fig. 1 to 7. In the drawings, common components are denoted by the same reference numerals. 1. First embodiment example [ Structure of Elevator ] First, the structure of an elevator according to a first embodiment (hereinafter referred to as "this example") will be described with reference to fig. 1 to 3. Fig. 1 and 2 are schematic configuration diagrams showing an elevator. Fig. 3 is a plan view showing an elevator. In the elevator 1 of this example, the car 2 moves up and down in a hoistway 100 formed in a building structure. The elevator 1 of this example is a so-called no-machine-room elevator in which no machine room is provided in the hoistway 100. The elevator 1 of this example is a 2:1 roping ratio type elevator. As shown in fig. 1 to 3, an elevator 1 includes a car 2 for carrying persons or cargoes, a counterweight 3, a hoisting machine 4, and main ropes 7. The elevator 1 further include