Patent ID: 6926375

Claim:
A unit connecting mechanism adapted to be mounted between plural box shaped units to cause the plural box shaped units to be coupled to and uncoupled from one another, the unit connecting mechanism comprising: a first coupling member operative to couple the box shaped units in a vertical direction; and two sets of second coupling members disposed at side walls of the box shaped units at inward areas thereof, respectively, to cause the box shaped units to be coupled in a lateral direction; wherein the first coupling member includes a connecting pin standing upright from an upper end of a lower one of the box shaped units coupled together in the vertical direction and having an engaging rod laterally extending from the connecting pin, a hook portion mounted in a lower area of an upper one of the box shaped units coupled together in the vertical direction and supported on a laterally extending shaft for rotational movement, a grip portion operatively connected to the hook portion and operative to rotate upwardly to cause the hook portion to catch the engaging rod to which the hook portion comes closer, and an engaging section including a stopper operative to lock the grip portion, which rotates upwardly, and to release the grip portion due to downward operation thereof; and wherein the two sets of the second coupling members are disposed on the side walls of the box shaped unit to be separated from one another in the vertical direction and in a rearward direction and each has an operating point exposed to a rear side of the box shaped units to allow each set of the second coupling members to be operated in a coupled condition or in an uncoupled condition.