Electricity: circuit makers and breakers – Multiple circuit control – Sequential operations
Patent
1996-05-10
1997-09-09
Hecker, Stuart N.
Electricity: circuit makers and breakers
Multiple circuit control
Sequential operations
2002931, H01H 900
Patent
active
056659458
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a portable controller for robot, which carries out operation of instruction to an industrial robot.
BACKGROUND ART
Hitherto, when carrying out operation of instruction to an industrial robot, an operator grips or grasps a portable controller by one hand or both hands to push a key or keys on the controller by thumbs of the both hands or finger of hand by which the controller is not gripped (held). In the portable controller, so called a deadman (dead-man's type) switch such that it is operative for a time period during which the controller is touched by hand, and it is stopped when hand is away from the controller is assembled in view of safety in the operation of the robot. As a portable controller of this type, there is disclosed a portable controller in which, in order that respective finger tips come into contact with keys of the controller at the same time when the operator grips or holds the portable controller from the lateral direction, a pressing plate of the deadman switch is disposed at the back side of the portable controller, and an inclined surface is provided at the controller back side edge portion with which hand of the operator comes into contact (e.g., Japanese Patent Application Laid Open No. 207580/1988).
Moreover, there is disclosed a portable controller in which a finger fitting portion having a shape such that finger is fitted is provided on the back side of the portable controller in order that an operator dose not become tired even if he grips or holds it for a long time (e.g., Japanese Utility Model Application Laid Open No. 70893/1988).
Since the work for giving instruction to the robot is carried out near the robot body, it is necessary to imergently or immediately stop the robot for the purpose of protection of the operator when the robot runs away for any reason. As a momentary operation when the robot runs away, there are instances where the operator allows his hand to be away from the portable controller, or there are instances where he tightly grips or grasps the portable controller.
However, in the constitution in which the deadman switch which is stopped when operator's hand is away from the controller is assembled as described above, there was the drawback that when operator tightly grips the controller, its objective is not attained although there is the effect when operator's hand is away from the portable controller.
DISCLOSURE OF THE INVENTION
An object of this invention is to provide a portable controller for robot of the fail-safe type in which the switch is turned OFF both when operator allows his hand to be away from the portable controller and when he tightly grips or grasps the portable controller at the time of runaway of the robot.
To solve the above-mentioned problems, this invention is directed to a portable controller in which a finger fitting portion is provided at least at one side edge of, the back plate of a box-shaped casing (housing), and a deadman switch which is turned OFF when no pressure is applied to the finger fitting portion, is turned ON by pressing force (pressure) when the finger fitting portion is gripped, and is turned OFF when the finger fitting portion is pressed by pressing force (pressure) greater than pressing force (pressure) when the finger fitting portion is gripped is provided at the finger fitting portion, the deadman switch comprises a pressing plate which can be inserted into a recessed portion provided within the finger fitting portion and can be withdrawn therefrom, a shaft having a shape of offset provided at the pressing plate, a dog plate fitted over the offset portion of the shaft and having a plurality of holes at the circumferential edge of the shaft, a plurality of bosses adapted to be inserted into the plurality of holes of the dog plate, a spacer in contact with the respective top portions of the bosses, and fitted over the shaft, a spring provided at the shaft outer circumferential portion so that one end is supported in the state pressed onto a fixed portion provid
REFERENCES:
patent: 4990729 (1991-02-01), Toyoda et al.
patent: 5115179 (1992-05-01), Fujii et al.
patent: 5212433 (1993-05-01), Yasuyuki
Hecker Stuart N.
Kabushiki Kaisha Yaskawa Denki
LandOfFree
Portable controller with deadman switch does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Portable controller with deadman switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Portable controller with deadman switch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-71800