JP4273751B2 - Elevator counterweight - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a counterweight suitable for an elevator in which a passenger car and a counterweight are connected by a main rope or the like to move up and down, particularly for an elevator having a narrow hoistway space.
[0002]
[Prior art]
FIG. 7 shows a conventional example in which the machine room is eliminated and the hoisting machine is installed at the lower part of the hoistway, and FIG. 8 is a plan view thereof (see, for example, Patent Document 1).
In the figure, 1 is a hoistway, 2 is a car, 3 is a counterweight, 4 is a guide rail for the car 2, 5 is a hoisting machine fixed to the wall of the hoistway 1 by a mounting member 20, and 7 is a main sheave. It is. Reference numeral 10 denotes a main rope, one end of which is attached to a fixed portion 11 at the upper part of the hoistway 1, and the sheaves 2a and 2b of the car 2, the turning sheave 21 at the upper part of the hoistway 1, the main sheave 7, the turning sheave 22 and the counterweight. The other end is attached to the upper fixed portion 12 of the hoistway 1 via the three sheaves 3a. 13 is a guide rail for the counterweight 3, and 14 is a landing entrance.
[0003]
[Patent Document 1]
JP2002-205888
[0004]
[Problems to be solved by the invention]
In the conventional example, as shown in FIG. 8, since there is a relatively large space in the hoistway 1, the arrangement of each sheave and the like is easy. However, when the space of the hoistway 1 is small, it may be difficult to arrange the hoisting machine 5 and each sheave. For example, in the case of FIG. 9, it is difficult to secure a space for the hoisting machine 5 and the main sheave 7. When this space cannot be secured, it is necessary to add a sheave and arrange the hoisting machine 5 and the main sheave 7 at another position such as below the counterweight. This results in the addition of a new sheave and the complexity of the rope arrangement. Problems come out.
[0005]
[Means for Solving the Problems]
In the present invention, a counterweight is provided with a through hole so that a main rope can pass therethrough.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. 1 is a front view of a counterweight, FIG. 2 is a plan view of the same, and FIG. 3 is a plan view of a hoistway.
The counterweight 30 of the present embodiment is provided with a through hole 31 through which the main rope 10 passes. Reference numerals 32 and 33 denote unit weights arranged on the left and right of the through hole, and the same reference numerals as those in FIG.
[0007]
With this configuration, the main rope 10 between the rolling sheave 22 and the main sheave 7 passes through the through hole 31, so that the hoisting machine 5 and the main sheave 7 can be disposed below the counterweight 30. Become a space.
[0008]
FIG. 4 shows another embodiment of the present invention, in which the through hole 31 is made smaller and the unit weight 34 is integrated. FIG. 5 also shows another embodiment of the present invention, in which a through hole 31 is arranged at an end portion and a unit weight 35 is integrated.
As described above, the position of the through hole 31 of the counterweight 30 can be selected according to the situation at the site.
[0009]
FIG. 6 also shows another embodiment of the present invention, in which the counterweight 30 is arranged behind the car 2, the hoisting machine 5 and the main sheave 7 are arranged at the upper part of the hoistway, and the turning sheave 22 is arranged at the lower part of the hoistway. It is a thing. According to this embodiment, since the hoisting machine 5 and the main sheave 7 can be arranged in the upper space of the counterweight 30 in parallel with the hoistway wall, the space is saved compared to the conventional example as shown in FIG. .
Thus, according to the present invention, the hoisting machine 5 and the main sheave 7 can be easily installed either above or below the counterweight 30.
[0010]
In each of the above embodiments, the through hole 31 may be surrounded by a low friction material or a roller. Further, the hoisting machine 5 and the main sheave 7 are not limited to the traction type and may be any driving device that can drive the main rope 10. Furthermore, not only the main rope 10 but a belt-like tension member may be driven.
[0011]
【The invention's effect】
As described above, according to the present invention, it is possible to prevent the increase in the number of sheaves and the complicated arrangement of the main rope and the like, and to realize space saving of the hoistway.
[Brief description of the drawings]
FIG. 1 is a front view of a counterweight showing an embodiment of the present invention.
2 is a plan view of FIG. 1. FIG.
FIG. 3 is a plan view of a hoistway showing an embodiment of the present invention.
FIG. 4 is a diagram showing another embodiment of the present invention.
FIG. 5 is a diagram showing another embodiment of the present invention.
FIG. 6 is a diagram showing another embodiment of the present invention.
FIG. 7 is a view showing an example of a hoistway of a conventional elevator without a machine room.
8 is a plan view of FIG. 7. FIG.
FIG. 9 is a plan view of a hoistway of a conventional elevator without a machine room.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hoistway 2 Passenger car 3,30 Counterweight 7 Main sheave 10 Main ropes 21, 22 Turning sheave 31 Through hole

Claims (1)

A car that goes up and down along the guide rail, a counterweight that goes up and down along the guide rail, a sheave arranged at the upper and lower parts of the hoistway, and the car and the counterweight that goes up and down around these sheaves In a thing provided with a tension member,
The counterweight according to claim 1, wherein the counterweight has a through hole through which a portion of the tension member that moves between the sheaves passes.

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