Gap adjustment apparatus and image formation apparatus

A gap adjustment apparatus comprising:

• a recording section;
• a guide axis that supports the recording section in such a manner that the recording section can move while facing a recording target medium, the guide axis being able to move in such a manner that a gap between the recording section and the recording target medium can be adjusted;
• a cam section that is either provided directly on the guide axis or provided not directly on the guide axis so as to engage indirectly with the guide axis, the cam section being able to rotate so as to move the guide axis;
• a rotatable member that rotates together with the cam section;
• an arm section that is provided either as a part of or on the rotatable member and substantially radiates out from a rotation axis line of the rotatable member;
• a rotating section that is brought into engagement with the arm section as the recording section moves in a main scan direction and rotates the rotatable member by transmitting a force to the rotatable member via the arm section;
• a burden detecting section that detects a burden placed at each time when an arm is brought into engagement with the rotating section;
• and
• a judging section that judges, on the basis of a result of detection made by the burden detecting section, an initial position of the cam section that corresponds to the engagement of the above-mentioned one of the plurality of arms and the rotating section,
• wherein the arm section has a plurality of arms;
• and a burden that is placed at the time when one of the plurality of arms is brought into engagement with the rotating section differs from a burden that is placed at the time when each of the remaining arms other than the above-mentioned one of the plurality of arms is brought into engagement with the rotating section.

A gap adjustment apparatus comprising:

• a recording section;
• a guide axis that supports the recording section in such a manner that the recording section can move while facing a recording target medium, the guide axis being able to move in such a manner that a gap between the recording section and the recording target medium can be adjusted;
• a cam section that is either provided directly on the guide axis or provided not directly on the guide axis so as to engage indirectly with the guide axis, the cam section being able to rotate so as to move the guide axis;
• a rotatable member that rotates together with the cam section;
• an arm section that is provided either as a part of or on the rotatable member and substantially radiates out from a rotation axis line of the rotatable member;
• and
• a rotating section that is brought into engagement with the arm section as the recording section moves in a main scan direction and rotates the rotatable member by transmitting a force to the rotatable member via the arm section,
• wherein the rotatable member is provided on at least one end portion of two end portions of the guide axis.