Positioning structure between sheet feeder and image forming apparatus to be installed onto top of the sheet feeder

A positioning structure between a sheet feeder and an image forming apparatus to be installed onto a top of the sheet feeder,

• the image forming apparatus having a skeleton frame including a horizontal beam at a lower end thereof, the horizontal beam having a positioning hole formed in a lower surface thereof,
• the sheet feeder having a skeleton frame including a horizontal beam at an upper end thereof, the horizontal beam having a positioning hole formed in an upper surface thereof,
• the positioning structure comprising:
• a positioning aiding member attached to the horizontal beam of the sheet feeder and having a positioning hole formed at an opposed portion thereof opposed to the horizontal beam of the sheet feeder;
• a first positioning pin coupled with the positioning aiding member and configured to engage with the positioning hole formed in the horizontal beam of the image forming apparatus;
• and
• a second positioning pin fitted in both the positioning hole formed in the horizontal beam of the sheet feeder and the positioning hole of the positioning aiding member to position the positioning aiding member relative to the horizontal beam of the sheet feeder,
• wherein the positioning aiding member has a guide part configured to, when the image forming apparatus is installed onto the top of the sheet feeder, guide the horizontal beam of the image forming apparatus such that the positioning hole formed in the lower surface of the horizontal beam of the image forming apparatus approaches the first positioning pin coupled with the positioning aiding member as viewed in an extending direction of the horizontal beam of the sheet feeder.