Automatic original cover operator of a copying machine
An automatic original cover operator of a copying machine, includes a hinge part and a driving part. The hinge part includes a mounting member attached to the main body of the copying machine, a supporting member rotatably mounted on the mounting member via a main shaft, a lifting member rotatably mounted on side plates of the supporting member via a drive shaft, a part for controlling rotation of the hinge part, the part for controlling rotation serving to urge the supporting member in an opening direction of the original cover and the lifting member to overlap the supporting member, and a rotation controlling mechanism for the lifting member. The driving part includes a drive case, a drive motor mounted in the drive case, and a reduction mechanism mounted in the drive case for transmitting a rotation drive force from the drive motor to the main shaft.
1. An automatic original cover operator for a copying machine, said automatic original cover operator comprising:
a hinge part and a driving part to drive said hinge part, said hinge part comprising:
a mounting member having a bottom plate and two side plates extending upward from side portions of said bottom plate, said bottom plate attached to an upper portion of a main body of said copying machine;
a supporting member comprising a top plate and two side plates extending downward from side portions of said top plate, said side plates of said supporting member being rotatably mounted on said side plates of said mounting member via a main shaft so that the supporting member is rotatable with said main shaft;
a lifting member having a top plate fixed to an original cover of said copying machine and having two side plates extending downward from side portions of said top plate of said lifting member, said side plates of said lifting member rotatably mounted on said side plates ( 51 b , 51 b ) of said supporting member via a drive shaft;
a compression spring interposed between said mounting member and said lifting member, said compression spring adapted to urge said lifting member in an opening direction of said original cover such that said lifting member overlaps said supporting member; and
a rotation controlling mechanism for said lifting member comprising: a first locking member having a pair of engagement recess portions on one side portion thereof, said first locking member fixed to said main shaft and provided adjacent to one of said side plates of said supporting member, a second locking member having a pair of engagement convex portions disposed within said pair of engagement recess portions, having an engagement portion, and having a locking portion, said second locking member rotatably mounted on said main shaft and provided adjacent to said first locking member, a locking pin mounted on one of said side plates of said lifting member and engaged with said engagement portion of said second locking member, a tension coil spring interposed between said locking portion of said second locking member and a pin in order to urge the engagement of said engagement portion with said locking pin;
wherein said driving part comprises:
a drive case mounted on said main shaft and connected to said drive shaft;
a drive motor mounted to said drive case, said drive motor being adapted to rotate said main shaft; and
a reduction mechanism mounted in said drive case and transmitting a rotation drive force from said drive motor to said main shaft via an electromagnetic clutch;
wherein said driving part is rotatable together with said supporting member when said original cover opens and closes.
2. The automatic original cover operator according to claim 1 , wherein said hinge part further comprises a fluid damper device operating at a predetermined closing angle of said original cover relative to said upper portion of said main body.
3. An office equipment comprising said automatic original cover operator according to claim 1 .
4. The automatic original cover operator according to claim 1 , further comprising a first spring receiving member swingably supported on said mounting member via locking pins, a second spring receiving member slidably receiving said first spring receiving member and swingably supported on said lifting member, and said compression spring resiliently provided in said first spring receiving member and said second spring receiving member.