Abstract: A high-pressure tank liner includes a body portion formed from a cylindrical body, a diameter-expanded part formed into a cylindrical body at the body portion with a larger diameter than an outside diameter of a general part of the body portion, and a staircase portion including stairs and formed at a stepped portion between the general part and the diameter-expanded part of the body portion. A distance from a corner on the diameter-expanded part side of the stepped portion to a peripheral surface of the general part while passing through a corner of each stair constituting the staircase portion is shorter than a lateral width of roving formed from reinforced fibers arranged in such a way as to extend in a circumferential direction of the body portion.

Abstract: A high-pressure tank liner manufacturing device includes: a heater to heat and melt end surfaces of liner halves; a heater transportation mechanism configured to slidably move the heater between a waiting position for the heater and a heating position for the heater; an elevation mechanism (drive mechanism) configured to drive a pair of the liner halves so as to cause the pair of liner halves to be relatively moved closer to each other or away from each other; and a parallelism adjustment mechanism configured to adjust parallelism of the end surfaces of the liner halves in accordance with the heater being slidably moved.

Abstract: The present invention provides a building construction method and a room module which can realize reduction in a construction period in addition to reduction in an on-site working amount by further enlarging a room modularization range. The present invention uses four column members which are vertically provided at inner corners of four room modules adjacent to one another as a frame column of the building when a plurality of room modules are installed in a grid pattern on a floor surface of the building. Specifically, the present invention uses the column member of an angular steel pipe, which the room module has, as the frame column of the building. Thereby, on a construction site, it is not necessary to construct the frame column in advance, and the frame column can be constructed by using the column members of the room module while the room module is installed on the site.

Abstract: The present invention provides a building construction method and a room module which can realize reduction in a construction period in addition to reduction in an on-site working amount by further enlarging a room modularization range. The present invention uses four column members which are vertically provided at inner corners of four room modules adjacent to one another as a frame column of the building when a plurality of room modules are installed in a grid pattern on a floor surface of the building. Specifically, the present invention uses the column member of an angular steel pipe, which the room module has, as the frame column of the building. Thereby, on a construction site, it is not necessary to construct the frame column in advance, and the frame column can be constructed by using the column members of the room module while the room module is installed on the site.