Projection system

A projection system comprising:

• a screen;
• an image projection device configured to project an image on the screen;
• and
• a carrying platform on which the image projection device is mounted, and which is configured to move, wherein
• the carrying platform includes
• a projection direction variable part which is configured to change a projection direction of the image, and
• a support mechanism configured to support the screen so as to adjust a position of the screen in a direction crossing an installation surface on which the carrying platform is installed, wherein the support mechanism includes:
• a first position adjustment mechanism configured to adjust a position where the screen is supported in a height direction from the installation surface, and
• a second position adjustment mechanism configured to adjust a position where the screen is supported in a direction crossing the height direction, wherein the second position adjustment mechanism includes:
• a first column part which is rotatably supported by the first position adjustment mechanism, and which extends in a first direction parallel to the installation surface,
• a second column part which extends in a second direction crossing the first direction, which is fixed to a central portion of the first column part at the one end portions of the second column part, and which rotates around a rotational axis along the first direction of the first column part,
• an operating part which is coupled to another of the end portions of the second column part, and which rotates the second column part, and
• arm parts which are respectively provided to one of end portions of the first column part and another of the end portions of the first column part, which extend in a third direction opposite to the second direction, and which support the screen.