| 摘要 |
An integral unit is provided comprising a raisable and tiltable door panel member and a frame structure therefor containing the driving mechanism. All the components of the driving mechanism are not only contained within the door frame member, but are also entirely concealed therewithin so that the integral unit has an agreeable and esthetic appearance, both from the front and from the rear side. Nobody can tamper with the driving mechanism, neither from its front nor from its rear side. No greased nor oiled components (such as chains, cables and the like) are exposed, with which the user may soil its clothes or its hands when passing by. The entire unit may be manufactured and its operation tested at the factory, and thereafter it can be assembled at the site of use by only fixing the frame in position in the corresponding wall aperture. The only additional operation which must be made thereafter is to connect the wires, already provided in the frame, to the corresponding electric mains through corresponding control means for energizing the motor (also contained within the frame) which must drive the moving parts. Thus an absolute minimum of installation work must be performed at the site of use, while all the assembling and testing work is done at the factory. The frame structure is designed so as to be able to contain all the other components and these are arranged in such a manner within the hollow frame structure that they require a true minimum of space, without any part protruding from the frame. The driving mechanism may be also provided with clutch means which in emergency situations allows the operation by hand of the door panel member.
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