Elevator control device

Elevator – industrial lift truck – or stationary lift for vehicle – With monitoring – signalling – and indicating means

Reexamination Certificate

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Details

C187S413000

Reexamination Certificate

active

06488126

ABSTRACT:

TECHNICAL FIELD
The present invention relates to an elevator controlling apparatus for controlling the operation of an elevator.
BACKGROUND ART
FIG. 7
is a plan view showing a conventional elevator disclosed in, for example, Japanese Patent Application Laid-Open No. Hei 3-18569. In the figure, a car
1
is raised and lowered within a hoistway
2
. A main control panel
3
and a sub-control panel
4
for controlling the operation of the elevator are located at the bottom portion, i.e., a pit
2
a
of the hoistway
2
. The main control panel
3
is supported by a supporting stand
7
at the inside of a hall
5
side inspection door
6
. The sub-control panel
4
is supported by supporting legs
8
in the space behind the car
1
.
In recent years, cases where the controlling apparatus, i.e., the main control panel
3
and the sub-control panel
4
in this example, is disposed in the space in the hoistway
2
, as shown in this example, without providing a machine room at the upper portion of the hoistway
2
have increased.
Next,
FIG. 8
is a cross-sectional view of a conventional elevator controlling apparatus disclosed in, for example, Japanese Patent Application Laid-Open No. Hei 4-338074. In the figure, a case
11
is provided with an air inlet
11
a
and a plurality of air outlets
11
b.
The air inlet
11
a
is disposed at the lower portion of the side of the case
11
, and the air outlets
11
b
are disposed at the top of the case
11
. A filter
12
is provided at the air inlet
11
a.
Amounting panel
13
is fixed in the case
11
. A printed circuit board
14
is attached to the mounting panel
13
. A plurality of on-board parts
15
are mounted on the printed circuit board
14
. Also, a radiation fin device
16
is fixed in the case
11
. The radiation fin device
16
is provided with a plurality of fin portions
16
a.
A plurality of heat generating parts
17
are mounted on the radiation fin device
16
. Snubbers
18
which are composed of resistors, capacitors or the like are attached to the heat generating parts
17
. These snubbers
18
restrain surge voltages generated when switching high power semiconductor devices.
A first cooling air passage
19
a
is formed between the neighboring fin portions
16
a
in the case
11
. A second cooling air passage
19
b
is formed between the printed circuit board
14
and the radiation fin device
16
in the case
11
. A cooling fan
20
is disposed between the first and second cooling air passages
19
a
and
19
b
and the air inlet
11
a.
In such a controlling apparatus, cooling air is introduced into the case
11
from the air inlet
11
a
by driving the cooling fan
20
. The air flowing into the case
11
passes along the paths as shown by the arrows A and B in
FIG. 8
, and is exhausted outside of the case
11
through the air outlets
11
b.
Accordingly, the on-board parts
15
and the heat generating parts
17
are cooled directly or through the radiation fin device
16
.
As described above, in recent elevators, since the controlling apparatus is disposed in a narrow space, a reduction in the thickness of the controlling apparatus is desired. In contrast, in the conventional controlling apparatus of the type shown in
FIG. 8
, the axis of the cooling fan
20
is disposed vertically to send the cooling air from the lower part to the upper part. Accordingly, the depth (thickness) of the case
11
can not be reduced to less than the diameter of the cooling fan
20
, so that reduction of the whole controlling apparatus the thickness is disturbed by the cooling fan
20
.
DISCLOSURE OF THE INVENTION
In order to solve the above-noted defects, an object of the present invention is to provide an elevator controlling apparatus which can be reduced in a total size of thickness and disposed in a narrow space.
According to the present invention, there is provided an elevator controlling apparatus comprising: a case including a fin attaching surface, an air inlet and an air outlet, the air outlet being provided in the fin attaching surface above the air inlet; a radiation fin device attached to the fin attaching surface in the case; a heat generating part mounted on the radiation fin device; a cooling fan for cooling the radiation fin device, disposed in the case and having a rotation shaft which extends in a direction perpendicular to the fin attaching surface; and a ventilating duct disposed in the case for forming a ventilating passage between the radiation fin device and the cooling fan.


REFERENCES:
patent: 3610371 (1971-10-01), Abbott
patent: 3747300 (1973-07-01), Knudson
patent: 5271455 (1993-12-01), Semple
patent: 5679934 (1997-10-01), Juntunen et al.
patent: 6321877 (2001-11-01), Yamakawa
patent: 62-265798 (1987-11-01), None
patent: 3-18569 (1991-01-01), None
patent: 0326676 (1991-03-01), None
patent: 4-338074 (1992-11-01), None
patent: 4-365773 (1992-12-01), None
patent: 6-29194 (1994-04-01), None
patent: 2580507 (1998-06-01), None
U.S. patent application Ser. No. 09/619,490, Ishikawa et al., filed Jul. 19, 2000.

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