Packing method and packaging device for implementing packing method

Abstract

A packaging device is configured to implement a packing method that prevents a bridge from being generated inside a chute which supplies goods into a bag with a tube shape. In the packing method, goods dropped from above are accommodated in a chute with a funnel shape. The chute is then lowered while accelerating in a state where a discharge opening of the chute is open, and subsequently movement of the chute is suddenly reversed and the chute is raised so that the goods collected in the chute are discharged into a bag with a tube shape while being accelerated. The packaging device is provided with a cylinder which packs dropped goods into the bag with a tube shape, and the chute is raised and lowered in the cylinder.

1 . A packing method, where goods dropped from above are accommodated in a chute with a funnel shape and are then packed into a bag with a tube shape, comprising:
 collecting the goods in the chute;   lowering the chute from a raised position while accelerating in a state where a discharge opening of the chute is open to a lowered position; and   reversing direction of movement of the chute thereby raising the chute from the lowered position to a raised position,   wherein   the goods collected in the chute are discharged into the bag with a tube shape while being accelerated.   
     
     
         2 . A packaging device, which packs goods from a cylinder into a bag formed in a tube shape using a former, laterally seals an upper sealing portion of the bag in which the goods are packed and a lower sealing portion of a continuous bag which is continuous with the upper sealing portion of the bag at the same time using a lateral sealing means, and forms a sealed bag by separating the border of the sealing portions, comprising:
 a chute with a funnel shape arranged above the cylinder and configured to accommodate the goods which are dropped from above;   a gate configured to open and close a lower end discharge opening in the chute;   a raising and lowering mechanism configured to raise and lower the chute vertically between a raised position and a lowered position; and   a control section controlling the opening and closing of the gate and the raising and lowering of the raising and lowering mechanism,   wherein   the control section is configured to lower the chute from the raised position to the lowered position in which the goods are accommodated into the cylinder while accelerating movement of the chute downward in a state where the gate is open and then immediately reversing direction of movement of the chute thereby raising the chute to the raised position.   
     
     
         3 . The packaging device according to  claim 2 , further comprising:
 a gas supplying means configured to supply inert gas into the bag which is formed in a tube shape at an upper section of the cylinder,   wherein   the gate has an opening and closing gate which is configured to open and close an upper end opening section of the cylinder, and   the control section also controls the gas supplying means so that inert gas is injected from the gas supplying means into the bag which is formed in a tube shape while the opening and closing gate is open.   
     
     
         4 . The packaging device according to  claim 3 , wherein
 a lower end section of the cylinder is positioned above a lateral sealing portion in a bag which is formed with a tube shape,   the gas supplying means is configured to supply inert gas from a gas outlet, which is provided in an inner side of an upper section of the cylinder and faces downward, into the cylinder,   the gate is provided at an upper part of the gas outlet, and   the control section is configured to:   
       close the gate so as to accommodate the goods dropped inside the chute, open the gate and supply inert gas with a first flow amount from the gas outlet into the cylinder by controlling the gas supplying means immediately before the rearmost goods reach the chute,
 close the gate and supply inert gas with a second flow amount instead of the first flow amount from the gas outlet into the cylinder after the rearmost goods pass through the gate, and 
 stop supply of inert gas with the second flow amount when a process in which the lateral sealing means presses the bag which is formed in a tube shape is performed. 
 
     
     
         5 . The packaging device according to  claim 4 , wherein
 the gas outlet is formed in a ring shape along an inner wall of the cylinder.   
     
     
         6 . The packaging device according to  claim 2 , wherein
 the gate is detachably placed on an upper end section of the cylinder.   
     
     
         7 . The packaging device according to  claim 2 , wherein
 the chute is made of resin.   
     
     
         8 . The packaging device according to  claim 3 , wherein
 the gate is detachably placed on an upper end section of the cylinder.   
     
     
         9 . The packaging device according to  claim 4 , wherein
 the gate is detachably placed on an upper end section of the cylinder.   
     
     
         10 . The packaging device according to  claim 5 , wherein
 the gate is detachably placed on an upper end section of the cylinder.   
     
     
         11 . The packaging device according to  claim 3 , wherein
 the chute is made of resin.   
     
     
         12 . The packaging device according to  claim 4 , wherein
 the chute is made of resin.   
     
     
         13 . The packaging device according to  claim 5 , wherein
 the chute is made of resin.   
     
     
         14 . The packaging device according to  claim 6 , wherein
 the chute is made of resin.