Surface treatment apparatus

Details Surface treatment apparatus Surface treatment apparatus

B - Operations, Transporting

05

C

204/168, 32/78

B05C 3/10 (2006.01) B05C 13/00 (2006.01) B65G 49/04 (2006.01) B66C 1/12 (2006.01) B66C 1/16 (2006.01) C25D 13/22 (2006.01) C25D 17/06 (2006.01) C25D 17/28 (2006.01)

Patent

CA 2026174

A surface treatment apparatus having a treatment bath for immersing and treating a workpiece therein with the workpiece being put into and taken out of said treatment bath by the lifting and lowering thereof and with the workpiece being rotated about a horizontal axial line while in the bath. A jig is provided for holding the workpiece having a pair of suspending points at each end thereof in symmetrical relationship about a horizontal axial line. Ropes suspend the jig with each one connected to one of the suspending points at each end of said jig. In a first embodiment, a pair of hoisting apparatuses are provided with upper ends of the ropes connected to suspending points on one side at both ends of the jig being connected to one of the hoisting apparatuses and upper ends of the ropes connected to suspending points on the other side at both ends of the jig being connected to the other of the hoisting apparatuses. In a second embodiment, a pair of jig-rotating wheels are fixed on the same horizontal axial line at both ends of the jig. The ropes for suspending the jig are respectively wound around the jig-rotating wheels. A pair of hoisting apparatuses are provided with one end of each of the ropes being connected to one of the hoisting apparatuses and the other end of each of the ropes being connected to the other of the hoisting apparatuses. In a third embodiment, the four ropes are paired at each end of the jig with lower ends of each pair being fixed to each of the jig-rotating wheels by winding therearound in the opposite directions to each other. The four ropes are divided into two sets having respectively two ropes of the same winding direction and upper ends of two ropes of one set are connected to one of the hoisting apparatuses and upper ends of two ropes of the other set are connected to the other of the hoisting apparatuses. In the fourth embodiment, instead of the jig-rotating wheels, a pair of shaft extension portions are projectingly provided on the same horizontal axial line at both ends of the jig and a pair of bearing members are externally inserted onto both shaft portions and rotatably support the jig with a pair of ropes suspending the jig having a lower end of each of the ropes being respectively fixed to one of the bearing members and an upper end of each of the ropes being connected to at least one hoisting apparatus, whereby the jig can be lifted or lowered by the rotation of the at least one hoisting apparatus in one direction or in the opposite direction. A pair of guide frames for guiding the jig in engagement with the shaft extension portions are vertically provided in the treatment bath. A pinion is provided on at least one of the shaft extension. portions and a rack for engaging with the pinion is provided in at least one of the guide frames which are engaged with the shaft extension portions.

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