Proposed is a method for automatically replacing an electrode reel of a secondary battery which includes a reel holder mounting step, an adhesive providing step, a production reel outer diameter detection step, a production reel moving step, a standby reel supply step, and a material connection step of connecting an electrode material of the production reel of the bobbin buffer part and an electrode material of the standby reel to each other by using the adhesive, and cutting a remaining electrode material of the production reel.

An oxygen tube apparatus for transporting a length of oxygen tubing and facilitating mobility of a user includes a platform. A pair of wheels is rotatably coupled to the platform. A handle is coupled to the platform. The handle extends upwardly from the platform to facilitate a user in moving the platform. A reel casing with an interior space is coupled to the handle. A reel is positioned within the interior space. A tube is coiled around the reel. The tube is fluidly couplable to an oxygen source. The tube is outwardly extendable from the reel casing through an aperture. An adaptor port coupled to the reel casing is aligned with the reel to fluidly couple an oxygen hose to the tube and to transfer oxygen from the oxygen source to the reel casing to facilitate a user in receiving oxygen from the oxygen source.