Material or article handling – Self-loading or unloading vehicles – Conveyor
Reexamination Certificate
1999-07-29
2001-04-03
Bucci, David A. (Department: 3682)
Material or article handling
Self-loading or unloading vehicles
Conveyor
C414S719000, C074S029000, C074S490010, C901S014000, C901S019000
Reexamination Certificate
active
06210097
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a robot for loading burdens, and more particularly, to a burden loading robot having a balancer for compensating for off-center loading of weight of burdens so that the robot does not fall down when loading burdens of heavy weight.
2. Description of the Related Art
In industrial fields, various types of robots for loading burdens are used in order to efficiently carry burdens required for production of products. Generally, such a robot includes a robot main body for operation of the robot itself and a loading plate installed on the robot main body, on which the burdens are loaded. The loading plate is moved horizontally outwards from the robot main body and placed in a loading position in the course of loading, so that a worker can easily perform a work of loading burdens on the robot. The worker loads burdens on the loading plate at the state where the loading plate is placed at a loading position. When the loading of burdens is completed, the loading plate is moved back to the upper portion of the robot main body. Thereafter, the robot on which the burdens have been loaded moves to a desired position to remove the burdens. Otherwise, the robot main body moves the loading plate on which burdens have been loaded to a desired position. Then, the loading plate is moved back to the loading position as described above, so that the worker unloads the burdens easily.
In a conventional burden loading robot as described above, when a heavy-weight burden such as a liquid crystal display (LCD) panel carrier or a flat-panel display carrier is loaded on the loading plate, a big moment is applied to the robot due to the weight of the burden. Thus, when the weight is off-center on the extended loading plate, the robot may fall down. Particularly, in the case of a mobile robot for loading burdens as in an unmanned car which is not fixed to the ground, the robot may fall down where a big moment is applied thereto.
SUMMARY OF THE INVENTION
To solve the above problems, it is an object of the present invention to provide a burden loading robot for compensating for off-center loading of weight generated when burdens are loaded on an outwardly positioned loading plate, to thereby avoid the robot falling down and to enable the robot to perform a loading work stably even though a heavy-weight burden is loaded on the robot.
To accomplish the above object of the present invention, there is provided a burden loading robot comprising: a robot main body; a loading portion having a fixing portion which is fixed to the robot main body and a loading plate whose loading position is moved between loading positions spaced from the robot main body; a balancer installed to be accessed to and spaced from the robot main body; a driver for driving the balancer to gain access to and be spaced from the robot main body; and a controller for controlling the driver so that the balancer moves to a direction reverse to the movement direction of the loading plate when the loading plate moves to the loading position, in order to compensate for off-center loading of weight of the burdens loaded on the loading plate.
Here, the driver comprises a rack connected with the balancer; a pinion threadedly engaged with the rack; and a driving motor for driving the pinion in the forward and backward directions. It is preferable to further comprise a loading portion driving means for driving the loading plate to move between the fixing portion and the loading position. The controller controls the driver and the loading portion driving means to be interlocked with the loading portion to drive the balancer.
REFERENCES:
patent: 3713544 (1973-01-01), Wallace et al.
patent: 4442387 (1984-04-01), Lindbom
patent: 4466307 (1984-08-01), Kouno
patent: 3618223 (1986-12-01), None
patent: 3-208581 (1991-09-01), None
patent: 686865 (1979-09-01), None
patent: 795943 (1981-01-01), None
patent: 1293017 (1987-02-01), None
Kim Sung Kwun
Sung Hak Kyung
Bucci David A.
Joyce William C
Larson & Taylor PLC
Samsung Electronics Co,. Ltd.
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