Door machine of fireproof door
OwnerChung Hsien HSIEHinventor
Life of this patent
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Abstract
A door machine of a fireproof door comprises an input end to be actuated by an input axle; an output end loaded with weight of door panels, the loading force of which is transmitted back to a central axle through an output axle; a clutch mechanism normally connecting the central axle with the input axle together; a brake mechanism including a torsion spring which is integrated with the input axle of the input end and one end of which bears the loading force came from the central axle to shrink the inner diameter thereof so that the input axle is in an immobilized state; when an external force is applied to the input end, the other end of the torsion spring resisting against the weight of the door panels to expand the inner diameter thereof so that the input axle is rotated.
Claims10
A door machine (1) of a fireproof door, comprising:
- a housing (10) for supporting said door machine (1);
- an input axle (17) pivotally disposed on said housing (10), one end of said input axle (17) being connected with a brake mechanism (27);
- a driving mechanism (28) for a driving force to actuate said brake mechanism (27) so as to transfer the driving force for rotating said input axle (17);
- an output axle (11) pivotally disposed on said housing (10), said output axle (11) comprising a first end (110) and a second end (112), said first end (110) being fixed with an output wheel (111) for rolling up the fireproof door to open the latter;
- a central axle (13) pivotally disposed on said housing (10), one end of said central axle (13) being coupled to said second end (112) of said output axle (11) and the other end of said central axle (13) being fixed with an end disc (15);
- and
- a clutch mechanism (23) having a sliding sleeve (14) fitted on said central axle (13), said sliding sleeve (14) being selectively movable between a first set point and a second set point on said central axle (13), one end of said sliding sleeve (14) being provided with a first gear disc (141), the other end of said input axle (17) being provided with a second gear disc (171), said first gear disc (141) being engaged with said second gear disc (171) and selectively connected to said end disc (15) of said central axle (13);
- when said sliding sleeve (14) being located at said first set point, said first gear disc (141) is connected with said end disc (15) of said central axle (13) so that said central axle (13) is linked up with and rotated by said input axle (17);
- when said sliding sleeve (14) being located at said second set point, said first gear disc (141) is disengaged from said end disc (15);
- wherein said brake mechanism (27) comprises a first bushing (271) and a torsion spring (272), said first bushing (271) being fitted on said input axle (17) and one end portion of said first bushing (271) being fixed to said housing (10), said torsion spring (272) being fitted on the other end portion of said first bushing (271);
- when said driving mechanism (28) being actuated, said torsion spring (272) is de-twisted and winds off around said first bushing (271) so that said input axle (17) is free to rotate;
- when said driving mechanism (28) being not actuated, the weight of the fireproof door is transferred to said input axle (17) so that said input axle (17) twists said torsion spring (272) to wind up to a effect that said torsion spring is tightly constricted on said first bushing (271) so as to brake said input axle (17).
Dependencies are inferred from the claim text.