Locking device for staggered fin-tubes

Support and locking apparatus for closely packed staggered tubes of a heat exchanger, said apparatus comprising a plurality of support bars having two sets of arms which are generally normal to said support bars and extend outwardly from one of the sides thereof, one set of arms being one-half pitched out of phase with respect to the other set of arms, said support bars having openings which register with the arms of the adjacent support bars to support the distal end of said arms, adjacent support bars being mirror images so as to interlock, and a plurality of locking bars disposed generally parallel to said support bars, said locking bars having feet which extend from said locking bars so as to engage the tubes to hold the tubes in position, said locking bars slidably engaging said support bars so as to be able to slide lengthwise with respect to said support bars, whereby when slid in one direction the feet engage the tubes and when slid in the opposite direction the feet move away from the tubes freeing said tubes so that they may be removed from said support bars.