Abstract: The present invention addresses the problem of providing a double-layer seamless soft capsule having a water-soluble composition as its fill, and by preparing a capsule shell from an ultraviolet-curing resin composition, a double-layer seamless capsule is made which consists of a capsule shell and a water-soluble composition as a fill and where volatility of the fill due to permeation through the shell is low.

Abstract: A replacing and holding device includes an electrode tip puller including two stacked pick plates inserted between an end face of an electrode tip fitted into a shank fixed to a gun arm of a welding gun and an end face of a larger diameter portion of the shank, a guide rod that guides motions of the pick plates in a stacked direction thereof, a pick plate interspace increasing mechanism that increases a space between the pick plates according to positions of the pick plates along the guide rod, an electrode tip holder in one of the pick plates to hold the electrode tip pulled out from the shank, and an electrode tip contact portion in front of the shank in an insert direction of the shank, wherein the electrode tip comes into contact by a motion of the welding gun to insert the shank into the electrode tip.