Bolting device

A bolting device comprising:

• an operation part disposed on a table;
• a jig disposed on the table to contact an object to be bolted in which a bolt hole is defined, the jig comprising a through-hole configured to guide a bolt to the bolt hole;
• a guide inserted to the through-hole, the guide having a hollow shape configured to accommodate the bolt therein, the guide having an inclined inner surface with a shape having an internal diameter that gradually decreases in a downward direction to maintain verticality of the bolt, and the guide further having a cut portion in a movement direction of the bolt so that the inclined inner surface is elastically opened when the bolt is to be moved downward;
• and
• an elastic part in contact with an outer circumferential surface of the guide to elastically support a surrounding portion of the cut portion of the guide,
• wherein the guide comprises:
• an upper body having one end with an internal diameter equal to a head size of the bolt to contact an end of a head of the bolt, the upper body having an annular cross section with the internal diameter gradually decreasing in the downward direction from the one end;
• and
• a lower body having one end with an internal diameter equal to a screw size of the bolt to contact a lower end of a screw of the bolt when contracted,
• wherein the lower body is divided into a plurality of pieces by cuts of the cut portion in the movement direction of the bolt,
• wherein the plurality of pieces of the lower body are arranged along a circumference of the upper body and spaced apart from each other, and the cuts form spacings that are interposed between immediately adjacent pieces of the plurality of pieces,
• wherein the upper body and the lower body of the guide are integrally formed as contiguous parts of the guide, the upper body is a single contiguous piece, and the upper body and the lower body are made of an elastic material,
• wherein the elastic part comprises:
• an installation groove recessed from an inner wall of the through-hole;
• and
• an elastic spring extending in a direction crossing the movement direction of the bolt and disposed in the installation groove to protrude to an inside of the through-hole, thereby supporting a lower end of the guide, and
• wherein the cuts of the cut portion are located only in the lower body among the lower body and the upper body so that the plurality of pieces of the lower body are contiguous with the upper body.