Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Reexamination Certificate
1999-01-04
2001-05-01
Picard, Leo P. (Department: 2835)
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
C361S704000, C361S717000, C361S796000, C361S802000, C174S016300, C257S713000, C248S027100
Reexamination Certificate
active
06226181
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an improvement of a controller having a servo amplifier built in a cabinet.
BACKGROUND
A conventional controller having a servo amplifier built in a cabinet is shown in
FIGS. 3 and 4
.
A cabinet
1
of the controller is constituted by a rectangular box, and the inner space of the box is divided into forward and backward parts by a partition plate
2
arranged at the center of the inner space. A rectangular opening
5
is formed in the left-side portion of the partition plate
2
. In addition, mounting bolts (not shown) are provided in a standing manner on a front surface of the partition plate
2
near four corners of the rectangular opening
5
.
Bolt insertion holes
21
are formed at four corners of a rectangular base plate
6
in correspondence with the positions of the mounting bolts. A control unit
3
of a servo amplifier is fixed to the front surface of the base plate
6
, and a heat-radiation unit (not shown) of the servo amplifier is fixed to the rear surface. The mounting bolts of the base plate
6
are inserted into the bolt insertion holes
21
of the base plate
6
, and the tops of the mounting bolts are fastened by nuts
7
. At this time, the base plate
6
is fixed to the partition plate
2
to close the opening
5
.
A numeral control unit
4
is attached to a right-side portion on the front surface of the partition plate
2
. Therefore, in a state where the base plate
6
having the control unit
3
of the servo amplifier attached to the front surface and the heat-radiation unit of the servo amplifier attached to the rear surface is fixed to the partition plate
2
through the mounting bolts and the nuts
7
, the control unit
3
of the servo amplifier and the numeral control unit
4
are arranged in a forward space partitioned by the partition plate
2
, and the heat-radiation unit of the servo amplifier is arranged in a backward space. An air-blowing fan (not shown) for exhausting air heated by heat radiated from the heat-radiation unit of the servo amplifier to the outside is arranged in the backward space.
The control unit
3
of the servo amplifier is connected to other electric parts, e.g., the numeral control unit
4
, in the cabinet
1
through a direct-mounted cable
8
or a connector cable
9
. A panel
10
for performing maintenance operations for the control unit
3
of the servo amplifier and the numeral control unit
4
is attached to the front surface of the cabinet
1
such that the panel
10
can be freely opened and closed.
Since a large number of electric parts which are expandable are mounted on the control unit
3
and the heat-radiation unit of the servo amplifier, maintenance operations for these parts must be performed. For this purpose, the control unit
3
and the heat-radiation unit of the servo amplifier must be detached out of the cabinet
1
, however, when the conventional cabinet structure shown in
FIG. 3
, the opening/closing panel
10
is opened to take the cables
8
and
9
out, meshing of the nuts
7
for fixing the four corners of the base plate
6
is released, so that the control unit
3
and the heat-radiation unit of the servo amplifier are detached out of the cabinet
1
together with the base plate
6
. Such cumbersome operations are required.
DISCLOSURE OF THE INVENTION
It is an object of the present invention to provide a controller having a servo amplifier built in a cabinet, which is capable of easily detaching the servo amplifier from the cabinet.
In order to achieve the above object, in a controller having a servo amplifier built in a cabinet, according to the present invention, one surface of the cabinet is constituted by a detachable panel, the servo amplifier is fixed inside the panel, and the servo amplifier and other electric parts arranged in the cabinet are connected through a connector cable.
Preferably, a base plate is provided in a standing manner from an inner central portion of the panel, a control unit of the servo amplifier is fixed to one surface of the base plate, while a heat-radiation unit of the servo amplifier is fixed to the other surface of the base plate, the base plate is engaged with a channel-like engagement portion fixed to a partition plate for partitioning the space in the cabinet into two spaces to form an airtight seal between the two spaces in the cabinet, and a air-blowing fan is arranged in a space in which the heat-radiation unit is located.
According to the present invention, without a cumbersome operation such as attachment/detachment of screws and nuts, attaching/detaching operation of the servo amplifier can be easily performed by only detaching the panel constituting one surface of the cabinet. Also, since an arrangement in which the control unit and heat-radiation unit of the servo amplifier are separated from each other by the partition plate provided in the cabinet and the base plate provided in the standing manner on the detachable panel is employed, the control unit of the servo amplifier can be prevented from being over-heated, dust and dirt carried into the cabinet are prevented from penetrating the control unit by the function of the blowing fan arranged in the heat-radiation unit.
REFERENCES:
patent: D. 348869 (1994-07-01), Egger et al.
patent: D. 366867 (1996-02-01), Kurogawa et al.
patent: 4497038 (1985-01-01), Diepold-Scharnitsky
patent: 4731703 (1988-03-01), Tsukagushi et al.
patent: 4772999 (1988-09-01), Fiorina et al.
patent: 4920453 (1990-04-01), Onose et al.
patent: 5095403 (1992-03-01), Pin et al.
patent: 5303892 (1994-04-01), Minder et al.
patent: 5436794 (1995-07-01), Clemente et al.
patent: 5603618 (1997-02-01), Yasuyoshi et al.
patent: 5712765 (1998-01-01), Lehrman et al.
patent: 5983744 (1999-11-01), Watanabe et al.
patent: 1354308 (1964-06-01), None
patent: 2697381 (1994-04-01), None
patent: 2700913 (1994-07-01), None
patent: 56-108297 (1955-01-01), None
patent: 1-93785 (1989-06-01), None
patent: 1-115284 (1989-08-01), None
patent: 3-45695 (1991-04-01), None
patent: 408019986 (1996-01-01), None
patent: 8-250869 (1996-09-01), None
patent: 410315180 (1998-12-01), None
Patent Abstract of Japanese Patent 06204676, Jul. 22, 1994.
Patent Abstract of Japanese Patent 09307252, Nov. 28, 1997.
Hashimoto Yoshiki
Shimoda Yasuyuki
Datskovsky Michael
Fanuc Ltd.
Picard Leo P.
Staas & Halsey , LLP
LandOfFree
Controller with servo amplifier incorporated in cabinet does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Controller with servo amplifier incorporated in cabinet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Controller with servo amplifier incorporated in cabinet will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2454900