WORKING FRAME UNIT AND METHOD FOR USING WORKING FRAME UNIT

摘要

PROBLEM TO BE SOLVED: To prevent a foreign substance from being dropped into a container barrel when liquid is sprayed in a nozzle stub.SOLUTION: A working frame unit 10 allowing work in the nozzle stub includes: a frame in which a working chamber is demarcated by a partition wall facing an inner wall surface 2e of a side peripheral wall 2a through a gap in an inner space 2A of the container barrel and a wall bottom formed on a lower part of the partition wall and an access window facing an aperture end 3a of the nozzle stub is formed on the partition wall; and a shielding device 30 including an expanding/contracting cylindrical body 38 formed on the access window and extended to the aperture end 3a and an elastic ring body 36 formed on a cylinder axis direction tip 33c of the expanding/contracting cylindrical body 38 and pressed and stuck close to the periphery of the aperture end 3a to shield the inside of the nozzle stub from the inner space 2A of the container barrel. The elastic ring body 36 has a pocket 37 formed on the lower side of an inner peripheral edge in the ring-like tip face 36a extended in the peripheral direction and capable of guiding a liquid sprayed to the nozzle stub side and allowed to flow to the frame side to the lower part of the inner periphery.