Patent ID: 7165379
Filing Date: 2007-01-23
Classification: B65B

Abstract:
1. A band packing machine comprising: a body, a transmission unit, a forward-reverse unit, a tension unit, the transmission unit having a main shaft which is connected to a forward-reverse tension cam of the forward-reverse unit and a tension cam of the tension unit, protrusions on the forward-reverse tension cam and the tension cam being alternatively arranged with each other; the forward-reverse unit including a forward-reverse motor, a forward-reverse active wheel, a forward-reverse passive wheel and a forward-reverse link unit, the forward-reverse link unit including a forward-reverse level link, a forward-reverse tension bar and a forward-reverse passive bar, the forward-reverse motor driving the forward-reverse active wheel, the forward-reverse level link having an end thereof pivotably connected to the body and the other end of the forward-reverse level link being in contact with the forward-reverse cam, an end of the forward-reverse tension bar located above the forward-reverse level link and a forward-reverse spring connected between the forward-reverse tension bar and the forward-reverse level link, the other end of the forward-reverse tension bar pivotally connected to an end of the forward-reverse passive bar, the other end of the forward-reverse passive bar being rotatably connected to a wall of the body, the passive bar being rotatably connected to the forward-reverse passive wheel so as to maintain the forward-reverse passive wheel to be adjacent to the forward-reverse active wheel to clamp bands; the tension unit including a tension motor, a tension active wheel, a tension passive wheel and a tension link unit, the forward-reverse link unit including a tension level link, a tension bar and a tension passive bar; the tension motor driving the tension active wheel, two respective ends of the tension active wheel and the tension passive wheel being matched by teeth, the bands passing through two respective the other ends of the tension active wheel and the tension passive wheel, and the tension level link having an end rotatably connected to the body and an end of the tension level link being in contact with the tension cam, the other end of the tension level link being located corresponding to an end of the tension bar, a tension spring connected between the tension bar and the tension level link, the other end of the tension bar pivotably connected to an end of the tension passive bar, the other end of the tension passive bar being rotatably connected to the body, the tension passive wheel being rotatably connected to the tension passive bar so as to maintain the tension passive wheel to be adjacent to the tension active wheel, a tension spring connected between the forward-reverse level link and the tension level link.