IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0166751
(1993-12-15)
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우선권정보 |
DE-4242792 (1992-12-17) |
발명자
/ 주소 |
- Ruprecht Harald (Waldkirch DEX)
|
출원인 / 주소 |
- Erwin Sick GmbH, Optik-Elektronik (Waldkirch/Breisgau DEX 03)
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인용정보 |
피인용 횟수 :
8 인용 특허 :
0 |
초록
▼
A safety switching arrangement for the switching on and off of the power supply (11) of two actors (12a, 12b) for example relays, which, in dependence on the switching on of the current, and in dependence on a sensor switching signal (13a, 13b) jointly set a working apparatus (22) in operation, the
A safety switching arrangement for the switching on and off of the power supply (11) of two actors (12a, 12b) for example relays, which, in dependence on the switching on of the current, and in dependence on a sensor switching signal (13a, 13b) jointly set a working apparatus (22) in operation, the safety switching arrangement comprising two main switches (14a, 14b) arranged between the power supply (11) and each preferably earthed actor (12a, 12b). In each case a controllable normally closed auxiliary switch (16a, 16b) is arranged between the sensor signal input (15a, 15b) and the main switches (14a, 14b) and, with the main switch (14a, 14b) closed by the application of a sensor closing signal, is briefly opened by a test generator (45) to provide a test pause via a first control input (19a, 19b) at regular time intervals offset timewise to the other respective auxiliary switch (16b, 16a) so that, in each case, the brief opening of the associated main switch (14a, 14b) brought about-in the troublefree state of the associated switch (14a, 14b)-is not sufficient as a result of the inertia of the actors (12a, 12b) to set the attached working apparatus (22) out of operation. A test circuit (18a, 18b; 21a, 21b, 24a, 24b; 27a, 27b; 36a, 36b) is provided which examines during the test pause whether the main switch (14a, 14b) associated with the respective auxiliary switch (16a, 16b) is also open. On non-opening of a main switch (14a, 14b) during the test pause, the other respective auxiliary switch (16b, 16a) is set into the open state and is permanently maintained in this state.
대표청구항
▼
A safety switching arrangement for operating a working apparatus comprising: first and second actuators for jointly actuating the working apparatus; a power supply operatively coupled to the first and second actuators for supplying power to the first and second actuators; first and second main switc
A safety switching arrangement for operating a working apparatus comprising: first and second actuators for jointly actuating the working apparatus; a power supply operatively coupled to the first and second actuators for supplying power to the first and second actuators; first and second main switches coupled in series between the first and second actuators, respectively, and the power supply, the main switches each being movable between open and closed positions; first and second sensor signal inputs for receiving signals to move the first and second main switches into the open and closed positions; a controllable auxiliary switch coupled in series between each main switch and the first and second sensor signal inputs, respectively, each auxiliary switch being movable between open and closed positions; a test generator coupled to each auxiliary switch and having control inputs for providing a test pause at regular intervals wherein the associated auxiliary and main switches are opened during the test pause, the intervals of the test pauses associated with each auxiliary switch being offset from each other; and a test circuit for determining, during the test pause, whether the main switch associated with the respective auxiliary switch is open, the other auxiliary switch being opened when the main switch associated with said respective auxiliary switch remains closed during the test pause.
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