DEVICE FOR DRIVING DRIVEN MEMBER BY ROLLER CHAIN

    公开(公告)号:CA1130328A

    公开(公告)日:1982-08-24

    申请号:CA329723

    申请日:1979-06-14

    Applicant: HITACHI LTD

    Abstract: A door member such as a garage door is driven by a motor through a roller chain having a finite length to travel in the garage opening and closing directions. The roller chain is driven by a single drive sprocket driven by the motor to make its reciprocating movement along the same path while making rolling engagement at its roller portion with a guide rail constructed to support the roller portion of the roller chain from the opposite sides. A trolley connected to the door member by an arm is releasably coupled to the roller chain and is also guided along the guide rail while making sliding engagement therewith. A mechanism for detecting abutment of the door member with an obstruction present on the traveling path is provided to detect the above situation when a physical force is imparted to the roller chain due to the abutment. The opening and closing movement of the door member, stopping of rotation of the motor and detection of the presence of an obstruction are electrically controlled.

    AUTOMATIC DOOR CONTROL APPARATUS
    30.
    发明专利

    公开(公告)号:CA1153087A

    公开(公告)日:1983-08-30

    申请号:CA373902

    申请日:1981-03-26

    Applicant: HITACHI LTD

    Abstract: An automatic door operation control apparatus id disclosed which comprises a door operating device, a driving device for opening and closing the door, a condition detector for detecting a condition under which the movement of the door by the driving device is required to be discontinued, and a main control device for issuing a driving command to the driving device to actuate the same as required in response to a condition detection signal from the condition detector. The apparatus further comprises an auxiliary control device for stopping the operation of the driving device in the event that the main control device fails to issue a command to the driving device to stop the door movement within a predetermined length of time in response to the condition detection signal from the condition detector.

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