(57) Disclosed is a cam control mechanism in an ice making machine, in which a multiplicity
of freezing fingers (36,117) formed on the lower surface of a freezing base plate
(34,118) are dipped in the water supplied to a freezing chamber (32,129) defined in
a water tray (24,116) to carry out a freezing operation and form inverted dome-shaped
ice pieces (70,121) gradually around the freezing fingers (36,117); characterized
in that said mechanism consists of a control cam (13,136) to be rotated by an actuator
motor (AM) for tilting and resetting said water tray (24,116); and a control switch
(SW1,SW7) disposed on the fixed side corresponding to the location of said control cam (13,136)
for giving a cam action in accordance with a predetermined timing; wherein said control
cam (13,136) and said control switch (SW1,SW7) are adapted to control at least tilting and resetting of said water tray (24,116),
as well as, stopping thereof in such postures by the actuator motor (AM). The cam
control mechanism of the invention can successfully attain a series of cam actions
to be caused in accordance with the rotation of an actuator motor (AM) for driving
the water tray (24,116) : (1) tilting of the water tray (24,116) and resetting thereof
to the horizontal posture; (2) supply of hot gas to an evaporator (22,131) for accelerating
releasing of ice pieces in the ice releasing operation and stopping thereof; and (3)
replenishment of water to be frozen after a cycle of freezing operation and stopping
thereof, whereby to realize simplification of the control system and reduction of
production cost.
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