Patent ID: 6708605
Filing Date: 2004-03-23
Classification: B65B

Abstract:
A strap reserving control device for a strapping machine comprising:a strap reserving room consisting of a separating plate and a cover plate combined together with a preset interval; a balancing rod positioned at a lower side of said strap reserving room; a rotating shaft fixed perpendicularly on one end of said balancing rod and inserted through a through hole of said separating plate; a shaft sleeve secured on the outer side of said through hole of said separating plate and provided axially with a shaft hole, said shaft hole being for said rotating shaft to insert therethrough; a sensing rod bored with a lateral fit hole in one end said fit hole being for said fit portion of said rotating shaft to insert therethrough, said sensing rod fixed on said rotating shaft with combining members and positioned in the same direction as said balancing rod; a balancing weight unit consisting of a weight rod and a weight member, said weight rod provided with a lateral fit hole at one end, said fit hole receiving said engage portion of said rotating shaft, said weight rod secured on said rotating shaft with a combining member, the respective arm of force of said weight rod and said balancing rod positioned in opposite directions, said rotating shaft acting as a fulcrum between said weight rod and said balancing rod, said weight member able to be positioned at one of many locations on said weight rod; and a sensing switch positioned adjacent to said sensing rod and having a sensing portion at one end, the sensing switch being a proximity switch with a sensing portion on one side, said sensing portion sensing the movement of said sensing rod and said sensing switch sending out a signal, when the sensing rod reaches a predetermined position spaced from the sensing portion, to said strap feed device to start or stop operation, said strap feed device controlled to guide a packaging strap into said strap reserving room or stop guiding it.