Printing apparatus and method of positioning ultraviolet irradiation part

A printing apparatus comprising:

• a supporting part for a printing medium;
• a head provided at a position opposite the supporting part and configured to discharge ultraviolet-curable ink to the printing medium;
• an ultraviolet irradiation part including a butting part and disposed at a position opposite the supporting part such that a direction along a width direction of the printing medium is a longitudinal direction of the ultraviolet irradiation part, the ultraviolet irradiation part being configured to irradiate, with ultraviolet light from an irradiation surface thereof, the printing medium on which the ink is discharged;
• a protrusion fixed to the ultraviolet irradiation part and protruding further toward the supporting part side than the irradiation surface does;
• a frame configured to support the ultraviolet irradiation part;
• and
• an attaching part fixed to the butting part of the ultraviolet irradiation part and attachable to the frame with an attaching position thereof adjusted;
• and
• a guide part attachable to the frame and configured to guide the adjustment of the attaching position of the attaching part with respect to the frame, wherein
• the guide part includes a first butted part and a second butted part disposed at a position opposite the first butted part, the second butted part being provided further toward the supporting part side than the first butted part is;
• the butting part is located between the first butted part and the second butted part in an opposing direction in which the first butted part and the second butted part are opposite each other, and has a width smaller than a spacing between the first butted part and the second butted part;
• and
• a distance between the irradiation surface and the supporting part is a sum of a difference between the width of the butting part and the spacing in the opposing direction and a protruding length of the protrusion from the irradiation surface.

A printing apparatus comprising:

• a supporting part for a printing medium;
• a head provided at a position opposite the supporting part and configured to discharge ultraviolet-curable ink to the printing medium;
• an ultraviolet irradiation part disposed at a position opposite the supporting part such that a direction along a width direction of the printing medium is a longitudinal direction of the ultraviolet irradiation part, the ultraviolet irradiation part including a first side butting part on a first side in the longitudinal direction and configured to irradiate, with ultraviolet light from an irradiation surface thereof, the printing medium on which the ink is discharged;
• a protrusion fixed to the ultraviolet irradiation part and protruding further toward the supporting part side than the irradiation surface does;
• a frame configured to support the ultraviolet irradiation part;
• and
• a first side attaching part provided on the first side in the longitudinal direction of the ultraviolet irradiation part, and fixed to the first side butting part of the ultraviolet irradiation part and moreover attachable to the frame with an attaching position thereof adjusted;
• a first side guide part provided on the first side in the longitudinal direction of the ultraviolet irradiation part and attachable to the frame and moreover configured to guide the adjustment of the attaching position of the first side attaching part with respect to the frame;
• a second side attaching part provided on a second side in the longitudinal direction of the ultraviolet irradiation part and fixed to the ultraviolet irradiation part and moreover attachable to the frame with an attaching position thereof adjusted;
• and
• a second side guide part provided on the second side in the longitudinal direction of the ultraviolet irradiation part and attachable to the frame and moreover configured to guide the adjustment of the attaching position of the second side attaching part with respect to the frame, wherein
• each of the first side guide part and the second side guide part includes a butted part pair including a first butted part and a second butted part disposed at a position opposite the first butted part, the second butted part being provided further toward the supporting part side than the first contact part is;
• on the first side in the longitudinal direction of the ultraviolet irradiation part, the first side butting part is located between the first butted part and the second butted part in an opposing direction in which the first butted part and the second butted part are opposite each other, and has a width smaller than a first side spacing that is a spacing between the first butted part and the second butted part;
• on the second side in the longitudinal direction of the ultraviolet irradiation part, the second side attaching part includes a second side butting part that is located between the first butted part and the second butted part in an opposing direction in which the first butted part and the second butted part are opposite each other, the second side butting part having a width smaller than a second side spacing that is a spacing between the first butted part and the second butted part;
• the first side spacing and the second side spacing are equal to each other;
• a difference between the first side spacing and the width of the first side butting part and a difference between the second side spacing and the width of the second side butting part are equal to each other in the opposing direction;
• and
• a distance between the irradiation surface and the supporting part is a sum of the difference between the first side spacing and the width of the first side butting part in the opposing direction and a protruding length of the protrusion from the irradiation surface, and is a sum of a difference between the second side spacing and the width of the second side butting part and the protruding length of the protrusion from the irradiation surface.