Abstract: A classification device includes: an imaging unit that images a plurality of granular classification target objects each of which is disposed in one of a plurality of holes provided in a tray to acquire an image including the plurality of classification target objects; an acquisition unit that acquires images of each of the plurality of classification target objects by cutting out the images from the acquired image; and a sorting unit that classifies the acquired images of each of the plurality of classification target objects by using machine learning results and sorts the plurality of classification target objects based on the classification result.

Abstract: A framing bar connecting method for forming a frame by connecting adjacent framing bars with framing bar connectors. Each framing bar connector comprises: an L-shaped connecting plate having right-angled first and second arms, a slot formed in the first arm and threaded holes formed in the second arm; an L-shaped bottom plate having right-angled first and second arms and an opening formed in the first arm; and a lever provided with a cam at the base end thereof.

Abstract: A framing bar connector for firmly connecting adjacent framing bars of a frame through a simple action without requiring any special tool. The framing bar connector is formed in the shape of a bifurcate lever having a pair of legs each provided at the respective free ends thereof with eccentric cams, respectively. In assembling a frame, the eccentric cams are inserted in dovetail grooves formed in the backsides of the adjacent framing bars, respectively, and then the bifurcate lever is fully turned down, so that the eccentric cams engage firmly with the respective bottom surfaces of the dovetail grooves and the inner surfaces of flanges defining the dovetail grooves, respectively, to connect the adjacent framing bars firmly.