Elevator – industrial lift truck – or stationary lift for vehicle – With call registration means – Shared by plural load supports
Reexamination Certificate
2000-11-08
2002-04-30
Salata, Jonathan (Department: 2837)
Elevator, industrial lift truck, or stationary lift for vehicle
With call registration means
Shared by plural load supports
C187S247000
Reexamination Certificate
active
06378662
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an elevator group supervisory system including a plurality of respective unit control apparatus for controlling each group of elevators, and a group supervisory control apparatus for controlling an elevator group, and particularly to the control of input/output information in a plurality of respective unit control apparatus and a group supervisory control apparatus.
2. Description of the Related Art
FIG. 4
is a view schematically illustrating the configuration of a conventional elevator group supervisory system disclosed, for example, in the Japanese Patent Application Laid-open No. Hei 04-055272.
In
FIG. 4
, reference numeral
2
denotes a group supervisory control apparatus for supervisory to control of a plurality of elevators, reference numeral
3
collectively referring to
3
a
and
3
b
, denotes respective unit control apparatus, reference numeral
4
denotes hall devices such as call buttons installed in a hall, reference numeral
10
denotes star configured communication lines connecting the group supervisory control apparatus
2
and the plurality of respective unit control apparatus
3
respectively, reference numeral
11
denotes a switching apparatus for switching a destination of connection of a second transmission line
14
based on a switching signal from the group supervisory control apparatus
2
, reference numeral
12
denotes a switching signal transmitted to the switching apparatus
11
from the group supervisory control apparatus
2
, reference numeral
13
denotes a first transmission line connecting the switching apparatus
11
and the respective unit control apparatus
3
, reference numeral
14
denotes a second transmission line connecting the switching apparatus
11
and the hall devices
4
, and reference numeral
15
denotes a third transmission line connecting the switching apparatus
11
and the group supervisory control apparatus
2
.
Operation will now be described.
Operation of a case in which a conventional elevator group supervisory system is operating normally, will first be described.
The group supervisory control apparatus
2
turns off the switching signal
12
if the respective units control apparatus
3
a is operating normally. If the switching signal
12
is off, the switching apparatus
11
connects the first transmission line
13
and the second transmission line
14
. Information transmitted by hall devices from the hall devices
4
, such as call buttons and outputted from the hall device
4
a
is transmitted to the respective unit control apparatus
3
a
via the second transmission line
14
, the switching apparatus
11
and the first transmission line
13
. The respective unit control apparatus
3
a
having received the information transmitted by hall devices transmits the information to the group supervisory control apparatus
2
via the star configured communication lines
10
.
The group supervisory control apparatus
2
having received the information transmitted by hall devices transmits a respective unit control instruction to an arbitrary one of respective unit control apparatuses
3
via the star configured communication lines
10
. The respective unit control apparatus
3
a
controls in response to the received respective units control instruction. The group supervisory control apparatus
2
transmits information received by hall devices (control information to the hall devices
4
) to be received by the hall devices
4
such as button lights to the respective unit control apparatus
3
a
via the star configured communication lines
10
, and the respective unit control apparatus
3
a
transmits the received information received by hall devices to the hall device
4
a
via the first transmission line
13
, the switching apparatus
11
and the second transmission line
14
.
Operation of a case in which the group supervisory control apparatus
2
stops, will now be described.
If the group supervisory control apparatus
2
is stopped, the switching signal
12
is not outputted and is turned off. If the switching signal
12
is off, the switching apparatus
11
connects the first transmission line
13
and the second transmission line
14
.
Therefore, the information transmitted by hall devices outputted from the hall device
4
a
is transmitted to the respective unit control apparatus
3
a
via the second transmission line
14
, the switching apparatus
11
and the first transmission line
13
in the same manner as in the normal time. The respective unit control apparatus
3
a
controls the respective unit in response to the information transmitted by hall devices because the respective unit control instruction is not sent to the respective unit control apparatus
3
a
from the group supervisory control apparatus
2
. At the same time, the respective unit control apparatus
3
a
transmits the information received by hall devices such as button lights to the hall device
4
a
via the first transmission line
13
, the switching apparatus
11
and the second transmission line
14
.
Operation of a case in which an arbitrary respective unit control apparatus
3
a
stops, will now be described.
If the respective unit control apparatus
3
a
is stopped, the group supervisory control apparatus
2
turns on the switching signal
12
. If the switching signal is on, the switching apparatus
11
connects the third transmission line
15
and the second transmission line
14
. The information transmitted by hall devices such as a call button outputted from the hall device
4
a
is transmitted to the group supervisory control device
2
via the second transmission line
14
, the switching apparatus
11
and the third transmission line
15
. The group supervisory control apparatus
2
having received the information transmitted by hall devices transmits a respective unit control instruction to an arbitrary respective unit control apparatus
3
b
other than the respective unit control apparatus
3
a
that is stopped via the star configured communication lines
10
. The respective unit control apparatus
3
b
controls in response to the received respective unit control instruction. At the same time, the group supervisory control apparatus
2
transmits the information received by hall devices such as button lights to the hall device
4
a
via the third transmission line
15
, the switching apparatus
11
and the second transmission line
14
.
Since the conventional elevator group supervisory system is configured as described above, if the group supervisory control apparatus
2
that controls the elevator group stops, only the respective unit control apparatus
3
a
can respond to the hall devices
4
, and the service quality of the entire elevator group supervisory system decreases.
In addition, since there is provided the switching apparatus
11
for switching the destination of connection with respect to the hall devices
4
from the respective unit control apparatus
3
a
to the group supervisory control apparatus
2
, so that the group supervisory control apparatus
2
can respond to the hall devices
4
even if the respective unit control apparatus
3
a
stops, increase of costs arises. This is not limited to the hall devices
4
, but similar problems are observed in the connection with extension devices and external devices outside the elevator group supervisory system.
Moreover, the connection of a transmission line in place of the star configured communication lines
10
is required in order to cope with increasing volume of communication between the group supervisory control apparatus
2
and the respective unit of control apparatus
3
due to advanced functionality of the elevator group supervisory system and in order to realize reduction of costs.
SUMMARY OF THE INVENTION
The present invention has been devised in view of the above and other drawbacks, and it is an object of the present invention to provide an elevator group supervisory system with which a group supervisory control apparatus and all respective unit control apparatuses can share
Leydig , Voit & Mayer, Ltd.
Mitsubishi Denki & Kabushiki Kaisha
Salata Jonathan
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