Using electromagnetic principle, the core of electromagnet is used as a bolt. When the electromagnet has electricity, the bolt is retracted and the bolt is extended when the electromagnet loses power. When power failure, pull the hand zipper, plug to block the rotation of the attack sleeve, drive the drive gear along the axial motion and mesh with the driven gear, drive the door operation. When the motor is in power, the iron core is retracted, pulling the hand zipper, and driving the sleeve with the driving gear to rotate over the shaft. The clutch mechanism can also adopt friction material clutch mechanism including pressure spring, attack sleeve with triangular teeth, retaining ring, retaining block and friction material.
Garage doors and gates of industrial gates
Garage doors and industrial doors, including the panel and the back plate, the panel and the back plate connection groove through the gear riveting together, the back plate by multi-layer galvanized steel or color steel superimposed to replace the original embedded iron, ensure that the installation is stable. A plurality of grooves are pressed on the surface of the panel. A foam strip is also arranged at the connection groove of the panel and the backplane. The back boards suppress many raised keels. The riveting area at the groove is designed to roll the back plate of the door plate out of the mandarin duck buckle by rolling the edge of the door plate with the rolling mill forming principle, and then to be joined together by riveting and pressing the gears, so that the door plate in the first part of the original technology and structure, compared to double enhance the role of the door plate connection, even if the door body is in use without any in the process. Under the tension of torsion springs, the impact of gravity will not be easily separated and damaged.
In the first part of the hinge often inaccurate situation, completely solve this defect, arbitrarily within the height of the hinge, you can accurately find the embedded position to ensure the stability of the hinge. The raised keel means that the reinforcing rib and the door plate become a whole, and the placement of the external reinforcing rib is not needed. The material is saved, the wind resistance of the door plate is enhanced, and the cost is reduced. A 2 mm foam adhesive strip was added to the convex groove of the panel and the back plate to stop the leakage of the polyurethane foaming agent and to solve the surface pollution of the door plate and no longer waste materials. Several grooves with a depth of 3 are pressed on the surface of the door panel, which effectively solves the waste of flattening the door panel surface by using a large amount of foaming agent after the metal pressing deformation, and also increases the strength of the panel.
1) Steel plate: Electroplated galvanized steel plate (base material is 08F steel) of SECC-P type produced by Shanghai Baosteel. The thickness of indoor and outdoor plates is not less than grade D 0.8/0.8mm, and the use range includes panel and skeleton.
2) door fans should be equipped with mesh steel skeleton inside and around, and the thickness of the steel plate used in the framework is not low 0.8mm. Add 1.5mm thick reinforcing plate to lock and hinge position.
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