Collector

A collector comprising a main body comprising:

• a travel device including front and rear wheels;
• an electric driving device to drive the travel device;
• a battery to supply electric power to the driving device;
• a collection device to pick up a collection target on a surface of ground;
• and
• a collection container to accommodate the collection target, wherein
• at least part of the battery and at least part of the collection container are disposed between respective axles for the front and rear wheels,
• respective positions of centers of gravity of the battery and the collection container are situated in an area defined between a first tangential line tangent to an upper portion of the front wheel and an upper portion of the rear wheel and a second tangential line tangent to a lower portion of the front wheel and a lower portion of the rear wheel,
• the collection container has a bottom surface inclined such that a rear side of the bottom surface is lower than a front side of the bottom surface, and
• the battery is accommodated in an upper portion of the collection container and positioned closer to the front side than to the rear side of the bottom surface.