Data processing: generic control systems or specific application – Specific application – apparatus or process – Product assembly or manufacturing
Reexamination Certificate
2007-10-23
2007-10-23
Picard, Leo (Department: 2125)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Product assembly or manufacturing
C700S013000, C700S079000, C700S174000, C700S206000, C074S814000, C192S130000, C100S348000
Reexamination Certificate
active
11283577
ABSTRACT:
A safety device for a machine has a first machine part for carrying out a working movement towards a second machine part. It also has at least a first and a second optical barrier moving along with the first machine part during the working movement. The first optical barrier runs ahead of the first machine part by a first distance, and the second optical barrier is arranged at a second distance from the first optical barrier. A control unit is designed to stop the working movement of the first machine part when the first optical barrier is interrupted. A test unit allows to test whether the second optical barrier has been interrupted once the first machine part has been stopped. A blocking unit serves for blocking the working movement as a function of the test result from the test unit. Using this safety device it is possible to determine an overtravel of the first machine part in a simple and reliable manner. Furthermore, an optical sensor barrier can be used to detect the position for a switchover between a rapid motion and a creep motion of the machine without requiring additional position sensors.
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Picard Leo
Pilz GmbH & Co. KG
Shechtman Sean
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