Guide for elevator

Details Guide for elevator Guide for elevator

2002-11-06

2004-09-07

Salata, Jonathan (Department: 2837)

Elevator, industrial lift truck, or stationary lift for vehicle

Having specific load support drive-means or its control

Includes control for power source of drive-means

C187S393000, C187S409000

Reexamination Certificate

active

06786304

ABSTRACT:

TECHNICAL FIELD
This invention relates to a guide device for guiding a car along guide rails provided in a hoistway and, in particular, to a guide device for an elevator capable of restraining horizontal vibrations of a car.
BACKGROUND ART
FIG. 15
is a front view of a main portion of a conventional elevator as disclosed, for example, in JP 8-26624 A, and
FIG. 16
is a plan view of the elevator of FIG.
15
.
Referring to the drawings, a pair of guide rails
2
with a T-shaped section are arranged in parallel in a hoistway
1
. A car
3
is suspended in the hoistway
1
by a main cable (not shown), and is raised and lowered along the guide rails
2
by a drive device (not shown).
The car
3
has a car frame
4
, a cab
5
supported by the car frame
4
, and a plurality of rubber vibration isolators
6
arranged between the car frame
4
and the cab
5
. A car door
7
is provided in the cab
5
. Further, a control board
8
is mounted in the cab
5
.
First, second, and third acceleration sensors
9
a
,
9
b
, and
9
c
are mounted on the upper end portion of the car frame
4
. Fourth, fifth, and sixth acceleration sensors
9
d
,
9
e
, and
9
f
are mounted on the lower end portion of the car frame
4
. Vibration of the car frame
4
in the direction of the width of the car
3
(the Y-axis direction) is detected by the first and fourth acceleration sensors
9
a
and
9
d
mounted at the center of the car frame
4
. Vibration in the direction of the depth of the car
3
(the Z-axis direction) is detected by the second, third, fifth, and sixth acceleration sensors
9
b
,
9
c
,
9
e
, and
9
f
arranged on either side of the first and fourth acceleration sensors
9
a
and
9
d.
The guide rails
2
have installation-mounting portions
2
a
fixed to the walls (not shown) of the hoistway
1
and guide portions
2
b
extending perpendicularly from the installation-mounting portions
2
a
. Each guide portion
2
b
has first and second guide surfaces
2
c
and
2
d
for guiding the car
3
with respect to the depth direction and a third guide surface
2
e
for guiding the car
3
with respect to the width direction.
At each of the four corners of the car frame
4
, there is mounted a roller guide main body
10
engaged with the first, second, and third guide surfaces
2
c
,
2
d
, and
2
e
. Each roller guide main body
10
has a first roller
11
a
rolling on the first guide surface
2
c
, a second roller
11
b
rolling on the second guide surface
2
d
, a third roller
11
c
rolling on the third guide surface
2
e
, and a plurality of springs
12
for pressing the first, second, and third rollers
11
a,
11
b
, and
11
c
against the first, second, and third guide surfaces
2
c
,
2
d
, and
2
e.
Further, mounted on each roller guide main body
10
are first, second, and third actuators
13
a
,
13
b
, and
13
c
for adjusting the force with which the first, second, and third rollers
11
a
,
11
b
, and
11
c
are pressed against the guide rail
2
by generating electromagnetic forces with respect to the guide rail
2
.
FIG. 17
is a circuit diagram showing a part of the circuits in a control board
8
of FIG.
15
. Detection signals from the first through sixth acceleration sensors
9
a
through
9
f
are processed by first, second, third, fourth, fifth, and sixth controllers
14
a
,
14
b
,
14
c
,
14
d
,
14
e
, and
14
f
in the control board
8
. The actuators
13
a
,
13
b
, and
13
c
are controlled by corresponding controllers
14
a
through
14
f.
Each of the controllers
14
a
through
14
f
has a signal processing circuit
15
, a phase inverter
16
, and a pair of current amplification devices
17
a
and
17
b
. The signal processing circuits
15
receive detection signals from the acceleration sensors
9
a
through
9
f
and perform computation processing for restraining acceleration and outputting processing signals. The current amplification devices
17
a
and
17
b
amplify/adjust signals from the signal processing circuits
15
and output them to the actuators
13
a
through
13
c
. Each phase inverter
16
is connected between the signal processing circuit
15
and one current amplification device
17
b.
Next, the operation of the device will be described. When horizontal vibrations are generated in the car frame
4
during traveling of the car
3
, the acceleration of the vibrations are detected by the acceleration sensors
9
a
through
9
f
. The detection signals are processed by the controllers
14
a
through
14
f
, and the actuators
13
a
through
13
c
are controlled so as to cancel the acceleration.
Regarding the vibration component in the direction of the width of the car
3
, the acceleration is detected by the first and fourth acceleration sensors
9
a
and
9
d
, and the detection signals are processed by the controllers
14
a
and
14
d
, the acceleration being canceled by the actuators
13
c.
Regarding the vibration component in the direction of the depth of the car
3
, the acceleration is detected by the second, third, fifth, and sixth acceleration sensors
9
b
,
9
c
,
9
e
, and
9
f
, and the detection signals are processed by the controllers
14
b
,
14
c
,
14
e
, and
14
f
, the acceleration being canceled by the actuators
13
a
and
13
b.
The trouble with the above-described conventional elevator is that a pair of expensive current amplification devices
17
a
and
17
b
, composed of a large number of various parts, are provided in each of the controllers
14
a
through
14
f
, with the result that the number of current amplification devices is large and that the control board
8
is expensive.
DISCLOSURE OF THE INVENTION
The present invention has been made with a view toward solving the above problem in the prior art. It is an object of the present invention to provide an inexpensive guide device for an elevator which is superior in restraining horizontal vibrations of the car.
In accordance with this invention, there is provided a guide device for an elevator, which is engaged with a pair of guide rails each having first and second guide surfaces for guiding a car in a car depth direction and a third guide surface for guiding the car in a car width direction and which is adapted to guide the traveling of the car, the guide device comprising: a plurality of guide members mounted in the car and abutting the first through third guide surfaces; a plurality of urging means provided between the car and the guide members and adapted to press the guide members against the guide rails; a plurality of actuators mounted in the car and adapted to adjust the force with which the guide members are pressed against the guide rails; a plurality of acceleration sensors mounted in the car and adapted to detect accelerations in the depth direction and the width direction of the car; and a plurality of controllers for respectively controlling pairs of actuators reversing the force applied to the guide members in accordance with information from the acceleration sensors, wherein each controller has: a signal processing circuit for receiving detection signals from one of the acceleration sensors and adapted to perform computation processing for restraining any acceleration generated in the car; a current amplification device for amplifying/adjusting signals from the signal processing circuit; and a plurality of diodes respectively provided between the current amplification device and one of the pairs of actuators and adapted to selectively output signals from the current amplification device to the pair of actuators.


REFERENCES:
patent: 4271931 (1981-06-01), Watanabe
patent: 4337848 (1982-07-01), Kindler
patent: 5652414 (1997-07-01), Roberts et al.
patent: 5814774 (1998-09-01), Remmers et al.
patent: 5929399 (1999-07-01), Jamieson et al.
patent: 6351096 (2002-02-01), Jang
patent: 6401872 (2002-06-01), Morishita
patent: 6408987 (2002-06-01), Morishita
patent: 2002/0179377 (2002-12-01), Higaki et al.
patent: 2003/0192745 (2003-10-01), Utsunomiya et al.
patent: 2003/0226717 (2003-12-01), Husmann
patent: 2 262 932 (1998-07-01), None
patent: 61236388 (1986

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