Filling device

Abstract

To provide a filling device that realizes simplification of device configuration, improvement of design freedom, and redaction of production loads, and that prevents formation of a pointed peak on the upper surface of packed contents, or uneven filling of the container. Provided is a filling device (10) including a filling nozzle (20), a contents supplier (30), a plunger (40), and a gas supplier (50). A gas inlet (25) connected to the gas supplier (50), a gas outlet (26) opened to the nozzle hole (23), and a gas flow passage (27) are formed in the filling nozzle (20). The gas (A) supplied from the gas supplier (50) is ejected from a gap between an inner circumferential surface of the nozzle hole (23) and an outer circumferential surface of the plunger (40) at a lower end of the filling nozzle (20).

1 . A filling device comprising: a filling nozzle having a nozzle hole formed along an up and down direction and opened downward; a contents supplier that supplies contents to the nozzle hole; a plunger that is disposed inside the nozzle hole such as to be movable up and down and pushes out the contents supplied in the nozzle hole downward; and a gas supplier that supplies a gas,
 the filling nozzle being formed with a gas inlet connected to the gas supplier, a gas outlet opened to the nozzle hole, and a gas flow passage connecting the gas inlet and the gas outlet,   a gas supplied by the gas supplier being ejected from a gap between an inner circumferential surface of the nozzle hole and an outer circumferential surface of the plunger at a lower end of the filling nozzle.   
     
     
         2 . The filling device according to  claim 1 , wherein the filling nozzle includes a nozzle body, and a nozzle tip tool attached below the nozzle body, and
 a gap between opposite surfaces of the nozzle body and the nozzle tip tool serves as part of the gas flow passage and the gas outlet.   
     
     
         3 . The filling device according to  claim 2 , wherein the nozzle body is formed with the gas inlet, an opposite surface side opening that opens in the opposite surface of the nozzle body, and a body flow passage that connects the gas inlet and the opposite surface side opening,
 at least one of the opposite surfaces of the nozzle body and the nozzle tip tool is provided with an annular recess formed annularly around the nozzle hole and communicating with the opposite surface side opening, and   a first packing in an annular form is provided between the opposite surfaces of the nozzle body and the nozzle tip tool on an outer side of the opposite surface side opening.   
     
     
         4 . The filling device according to  claim 1 , wherein the filling nozzle is formed with a contents supply hole to which the contents supplier is connected,
 the contents supply hole extends sideways from the nozzle hole and reaches an outer surface of the filling nozzle, and   a second packing in an annular form is disposed between the inner circumferential surface of the nozzle hole and the outer circumferential surface of the plunger above the contents supply hole.   
     
     
         5 . The filling device according to  claim 1 , further comprising a nozzle cover placed around the filling nozzle, wherein
 the nozzle cover is provided such as the movable up and down relative to the filling nozzle, and   the gas inlet is formed above the nozzle cover when the nozzle cover is moved to an upper most position thereof.   
     
     
         6 . The filling device according to  claim 1 , wherein the filling nozzle includes, on a lower surface thereof, a tip protrusion formed by protruding a central part of the lower surface downward.