Elevator – industrial lift truck – or stationary lift for vehicle – With call registration means – Shared by plural load supports
Reexamination Certificate
2001-10-09
2003-03-18
Salata, Jonathan (Department: 2837)
Elevator, industrial lift truck, or stationary lift for vehicle
With call registration means
Shared by plural load supports
C187S247000, C187S391000
Reexamination Certificate
active
06533075
ABSTRACT:
TECHNICAL FIELD
The present invention relates to an elevator group supervisory control system for assignment processing for a plurality of elevators in response to hall call button information.
BACKGROUND ART
FIG. 10
is a view illustrating the construction of a conventional elevator group supervisory control system described in Japanese Patent Application Laid-Open No. 4-55272.
In
FIG. 10
,
1
-
3
represent three individual car control units (designated at “CC” in this figure) which individually control three elevator cars #
1
-#
3
(not shown), respectively, and
4
-
6
represent hall control units (designated at “HS” in this figure) for each floor and each elevator car for controlling hall equipment
8
,
9
.
8
and
9
represent the hall equipment comprising hall call buttons, indicator lamps and the like connected with the hall control units
4
-
6
.
In the case of the system shown in
FIG. 10
, there are provided hall control devices
4
a
-
4
n,
5
a
-
5
n
, and
6
a
-
6
n
corresponding to respective floors. The hall control devices
4
a
-
4
n
and
5
a
-
5
n
are connected with hall call buttons
8
a
-
8
n,
and the hall control devices
6
a
-
6
n
are connected with hall call buttons
9
a
-
9
n.
10
represents a group supervisory control unit (designated at “GC” in
FIG. 10
) which performs assignment processing of the respective elevator units or cars based on hall information such as hall button information, etc., transmitted from the hall control units
4
-
6
.
11
-
13
represent hall transmission paths or routes through which the hall control units
4
-
6
and the individual car control units
1
-
3
are connected with each other.
21
-
23
represent group supervisory control transmission paths or routes through which the individual car control units
1
-
3
and the group supervisory control unit
10
are connected with each other. Hall information is input to the group supervisory control unit
10
through the hall transmission paths
11
-
13
and the group supervisory control transmission paths
21
-
23
.
30
represents a second hall transmission path through which the hall control unit
6
and the group supervisory control unit
10
are connected with each other, and
33
represents a switching circuit for selectively making one of the first transmission path
13
and the second transmission path
30
effective.
41
represents a power supply for the group supervisory control unit
10
, and
42
-
44
represent power supplies for the individual car control units
1
-
3
, respectively. The power supplies are provided independently from each other.
The group supervisory control unit
10
includes an abnormality detection section
10
a
which operates to generate a switching signal E whereby the first hall transmission path
13
is made effective to the switching circuit
33
when the power supply
44
for the individual car control unit
3
is normal, whereas the second hall transmission path
30
is made effective when the power supply
44
is down.
FIG. 11
illustrates hall button information which are transmitted through the hall transmission paths
11
-
13
, the group supervisory control transmission paths
21
-
23
, and the second hall transmission path
30
.
71
illustrates an example of data in the case where an upward call of the hall call button
8
a
is generated.
Now, the operation of the conventional elevator system. First of all, when all the individual car control units
1
-
3
are operating normally, the switching circuit
33
is usually connected with a point of contact a as depicted by a solid line. The hall information from the hall call button unit
9
is picked up from the hall control unit
6
into the group supervisory control unit
10
through the first transmission path
13
, the individual car control unit
3
, and the group supervisory control transmission path
23
.
When an upward button of the hall call button
9
a
is pushed now, the hall control unit
6
outputs hall transmission path data
71
as hall button information. In the case of the normal operation of all the individual car control units
1
-
3
, the hall transmission path data
71
is received by the group supervisory control unit
10
through the hall transmission path
13
, the individual car control unit
3
, and the group supervisory control transmission path
23
.
Next, reference will be made to the hall information transmission operation of the hall call button unit
9
when the power supply for the individual car control unit
3
of the elevator car #
3
fails.
The abnormality detection section
10
a
in the group supervisory control unit
10
is comprised of a relay which is operatively connected with the power supply
44
of the individual car control unit
3
. Thus, if the relay detects that the power supply
44
of the individual car control unit
3
goes down, the abnormality detection section
10
a
outputs a switching signal E so that the connection is changed to a point of contact b of the switching circuit
33
as shown by a broken line.
As a result, the hall information issued by the hall call button unit
9
is transmitted from the hall control unit
6
to the group supervisory control unit
10
through the second transmission path
30
. Thus, even when the power supply for the individual car control unit
3
fails, the hall information on the hall call button unit
9
is picked up and sent to the group supervisory control unit
10
and hence becomes effective.
Accordingly, when the upward button of the hall call button
9
a
is pushed, the hall control unit
6
outputs the hall transmission path data
71
in the form of hall button information. When the power supply
44
of the individual car control unit
3
is down, the hall transmission path data
71
is received by the group supervisory control unit
10
through the hall transmission path
13
and the second hall transmission path
30
.
With the conventional elevator group supervisory control system as described above, connections are made in such a manner that the hall information from the hall call buttons is picked up by each of adjoining individual car control units
1
,
2
, which share this hall information for backup purposes, thus resulting in a problem that a lot of wiring is required.
In addition, the conventional elevator group supervisory control system is constructed such that when the power supply for the individual car control unit
3
goes down, the transmission lines or paths are switched over to send the hall information of the hall control unit
6
directly to the group supervisory control unit
10
. Therefore, when the group supervisory control unit
10
goes down, the elevator service by the individual car control unit
3
alone can only be done for the hall information of the hall call button unit
9
, thus posing another problem in that the operating efficiency of the elevator system is worsened.
The present invention is intended to obviate the problems as described above, and has as its object to provide an elevator group supervisory control system in which wiring for hall buttons can be simplified, and which is capable of carrying out elevator service with improved operating efficiency by transmitting hall information to a plurality of individual car control units even when some of the individual car control units and/or a group supervisory control unit are down.
SUMMARY OF THE INVENTION
A first aspect of the present invention resides in an elevator group supervisory control system, characterized in that for each of individual car control units, there is provided a communication control unit, having an independent power supply, which is connected with a corresponding individual car control unit, a hall control unit and a group supervisory control unit for data communications therebetween, and that the communication control units and the group supervisory control unit are bus-connected with one another by means of a group supervisory control transmission path.
A second aspect of the present invention resides in that each of the communication control units conn
Leydig , Voit & Mayer, Ltd.
Mitsubishi Denki & Kabushiki Kaisha
Salata Jonathan
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