JP2000103582A - Traction elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a traction elevator which is capable of reducing the sectional area of a hoistway, and safely effecting the maintenance and examination work for a hoisting machine. SOLUTION: In a traction elevator which is provided with a hoisting rope 3 to hoist a car 1 and a counterweight 2 and a hoisting machine 9 having a traction sheave 8 around which the hoisting rope is wound for drive, wherein the hoisting machine 9 is installed in an elevator hoistway 15, all or a part of the hoisting machine is installed within a perpendicularly projected area of the car 1 at a lower part of the hoistway 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traction elevator having a hoist installed in an elevator shaft, and more particularly to a traction elevator having a hoist installed below an elevator shaft.

[0002]

2. Description of the Related Art Recently, instead of providing a machine room outside the uppermost portion of an elevator shaft and installing a hoisting machine therein, the hoisting machine is installed at the top or bottom of the hoistway. Is considered.

[0003]

The above prior art is a novel idea in that there is no machine room, but the problem is that no consideration is given to reduction of the cross-sectional area of the hoistway and maintenance and inspection of the hoist. There is.

An object of the present invention is to provide a traction elevator that can reduce the hoistway cross-sectional area and can perform maintenance work of the hoisting machine safely.

[0005]

In order to achieve the above object, the present invention provides a hoisting rope for suspending a car and a counterweight, and a hoisting machine with a traction sheave, which is driven by winding the hoisting rope. In a traction elevator in which the hoist is installed in an elevator hoistway, all or a part of the hoist is installed in the vertical projection plane of the car below the hoistway.

According to the above construction, it is not necessary to increase the cross-sectional area of the hoistway for the hoist by installing all or a part of the hoist in the car vertical projection plane under the car. The road cross section can be minimized, and the hoist
By installing the hoist at the lower part of the hoistway, the maintenance and inspection of the hoist can be performed at the lower part of the hoistway, so that the work is safe.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a traction elevator according to the present invention will be described below with reference to FIGS.

In this traction elevator, a hoist 9 equipped with a traction sheave 8 is installed below a car 1 and below a hoistway 15. The car 1 and the counterweight 2 are suspended by a hoisting rope 3. The car 1 and the counterweight 2 travel along a car guide rail 12 and a counterweight rail 13 that guide the ascent and descent in the hoistway 15.

The hoisting rope 3 runs as follows. That is, one end of the hoisting rope 3 is fixed to the uppermost fixing portion 14 of the hoistway 15, and descends to the counterweight 2. A turning pulley 10 is pivotally supported by the counterweight 2. The counterweight 2 is suspended by winding the hoisting rope 3 around the turning pulley 10.
The hoisting rope 3 rises from the turning pulley 10 to the turning pulley 4 attached to the upper part of the counterweight rail 13, and the hoisting rope 3 wound around the turning pulley 4 is
It is wound around a traction sheave 8 via a guide pulley 6 installed below the hoistway 15 below the car 1.

The hoisting rope 3 wound around the traction sheave 8 passes through the guide pulley 7 adjacent to the guide pulley 6 below the car 1 to the turning pulley 5 attached to the upper part of the car guide rail 12. To rise.

The hoisting rope 3 wound around the turning pulley 5
It is wound around a pair of turning pulleys 11 supported on the lower part of the car 1 and extends upward from the opposite side of the car 1, and its end is fixed to the uppermost fixing part 14 of the hoistway 15.

The hoist 9 is provided with a hoistway 15 below the car 1.
It is installed at the bottom of. The hoisting machine 9 includes a traction sheave 8 in which the rotation axis is arranged in a horizontal direction or a left and right direction.
have. The hoisting machine 9 is provided with the traction sheave 8.
A gearless hoisting machine directly connected to an electric motor having the same rotation axis as the above, or a geared hoisting machine connected via a reduction gear may be used. Such a hoist 9 is installed in the vertical projection plane of the car 1. However, the hoisting machine 9 must be installed at a position where it does not interfere with a buffer installed at the bottom of the hoistway or equipment installed under the car floor. Since the hoisting rope 3 can be freely laid out, it can be installed at any position that does not interfere with the device.

The guide pulleys 6 and 7 for guiding the hoisting rope 3 to the traction sheave 8 are installed between the turning pulley 4 attached to the counterweight rail 13 and the car guide rail 12 and installed between the turning pulley 5. ing. The guide pulleys 6 and 7 are arranged at the lower part of the hoistway so as to partially overlap below the car 1.

In FIG. 2, the guide pulleys 6 and 7 are pivotally supported at 90 degrees with respect to the side wall of the car 1. For example, the guide pulleys 6 and 7 are swung about ± 10 degrees with respect to the car 1. Thereby, the arrangement of the hoisting machine 9 can be made appropriate.

By installing the hoisting machine 9 in the vertical projection plane of the car 1 at the lower part of the hoistway, a control device panel 20 for controlling the driving of the motor of the hoisting machine 9 can be arranged in the hoistway 15. it can. The car 1 is provided with a car door 18, and the hall door 17 is provided at a position of the hall facing the car.

According to the above embodiment, by installing the hoisting machine 9 in the vertical projection plane of the car 1 below the hoistway,
It is not necessary to secure an installation space for the hoist 9 in the hoistway cross-sectional area, and the hoistway cross-sectional area can be reduced.

Further, since the maintenance and inspection work of the hoisting machine 9 can be performed at the lower part of the hoistway, the worker does not have to work at a high place, and the safety for the worker can be ensured.

An electric motor for the hoisting machine 9 is an induction motor. However, in order to shorten the required minimum dimension between the bottom of the car 1 and the bottom of the hoistway when it is at the lowest position of the hoistway 15, an induction motor having a shape whose axial length is longer than the diameter of the motor is used. It is desirable.

According to the above-described embodiment, the electric motor of the hoisting machine 9 and the rotation axis of the traction sheave 8 are in the horizontal direction or the horizontal direction. By doing so, the required minimum dimension between the bottom of the car 1 and the bottom of the hoistway when it is at the lowest position of the hoistway 15 can be shortened. In addition, since the motor of the hoisting machine 9 is an abduction type motor in which the rotor rotates outside the stator, the fixed shaft can be integrally formed with the shock absorber at the center of the motor, and It is possible to allow room for equipment installation at the bottom of the road.

The embodiment using an induction motor as the motor of the hoisting machine 9 has been described. However, the present invention is not limited to the induction motor, and a thin synchronous motor having a permanent magnet on the rotor is used to reduce the winding. The installation space of the machine can be further reduced.

In addition, by using the guide pulleys 6 and 7, the hoisting machine 9 can be installed at an arbitrary position on the vertical projection plane of the car, so that there is an advantage that the hoistway can be easily designed.

Further, in the above embodiment, the car 1
The hoisting rope 3 is suspended below the hoisting rope 3, but the car 1 may be suspended by placing it on a suspension frame (not shown) to which the hoisting rope 3 is connected. May be hung up and down freely, and the car 1 may be placed on this fork.

[0023]

According to the present invention, it is possible to obtain a traction elevator in which the hoistway cross-sectional area can be reduced and the maintenance work of the hoist can be performed safely.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a hoistway showing an embodiment of a traction elevator according to the present invention.

FIG. 2 is a sectional view of a hoistway of the traction elevator shown in FIG.

[Explanation of symbols]

1 ... basket, 2 ... counterweight, 3 ... hoisting rope,
4, 5: turning pulley, 6, 7: guide pulley, 8: traction sheave, 9: hoisting machine, 20: control panel.

 ──────────────────────────────────────────────────の Continued on the front page (72) Yoshio Sakai, Inventor 1070 Ma, Hitachinaka City, Ibaraki Prefecture Inside the Mito Plant of Hitachi, Ltd. (72) Inventor Masayuki Ariga 1070 Mo, Hitachika City, Hitachinaka City, Ibaraki Prefecture Hitachi, Ltd. Inside the Mito Plant (72) Inventor Noboru Arahori 1070 Ma, Hitachinaka City, Ibaraki Prefecture Inside the Mito Plant, Hitachi, Ltd. (72) Inventor Hiroshi Nagase 1070 Ma, Hitachinaka City, Hitachi, Ltd. Terms (reference) 3F305 BA03 BB02 BB19 3F306 AA02 AA07 BA07 BB19 BC10

Claims (7)

[Claims] 1. A traction system comprising: a hoisting rope for suspending a car and a counterweight; and a hoisting machine with a traction sheave driven by winding the hoisting rope. The hoisting machine is installed in an elevator hoistway. A traction elevator, wherein all or a part of the hoist is installed in a vertical projection plane of the car below the hoistway. 2. The traction elevator according to claim 1, wherein a guide pulley for guiding a hoisting rope wound around a traction sheave installed under the car is installed under the car so as to overlap with the car. Traction elevator. 3. The traction elevator according to claim 1, wherein a turning pulley for extending a hoisting rope wound around the traction sheave toward the car and the counterweight side is provided with a guide rail for guiding the elevator car up and down. A traction elevator characterized in that the traction elevator is supported on each of upper portions of guide rails for guiding up and down of a counterweight. 4. A traction elevator according to claim 1, 2 or 3, wherein said hoist is gearless. 5. The traction elevator according to claim 1, wherein the hoist is driven by a synchronous motor. 6. The traction elevator according to claim 1, wherein the rotation axis of the traction sheave is vertically oriented. 7. The traction elevator according to claim 1, wherein the traction sheave has a rotation axis oriented in a horizontal direction.