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Channel-shaped housing for a barrier device in ventilation ducts, barrier device with the same and method of manufacture
Channel-shaped housing for a barrier device in ventilation ducts, barrier device with the same and method of manufacture
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机译:用于通风管道中的阻挡装置的通道形壳体,具有该壳体的阻挡装置及其制造方法
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摘要
The blank (100) has holes and slits (2,3) along its long sides, which form the ends of the housing when the blank is folded. There are circular holes (4) to accommodate a drive mechanism. Further holes (5) accommodate a trigger mechanism and there are holes (6) to accommodate a bearing plate. There are large circular holes (7) to allow adjustment of the mechanism and a slit (9) to accommodate a drive lever. The blank may be pre-folded to form ribs (12) and a narrow portion (14) in the region of a flap valve.
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