Abstract: A hanging rod control device for a display rack includes a mounting member, a rod, a positioning assembly, a release assembly, a driven device, and a drive device. The mounting member is attached to the display rack. The rod has one end secured to the mounting member with items hung from the rod. The positioning assembly is secured to the mounting member and includes a front plate, a rear fastening member, a shaft interconnecting the front plate and the rear fastening member, and a sliding member having teeth. The release assembly is penetrated by both the shaft and the sliding member and includes arms and positioning plates arranged in alternating fashion. The driven device is disposed in the mounting member and includes a cam and a shaft member operatively connected to the cam.

Abstract: A crane or hanger-type cargo lane device includes two parallel half housings, a chain mounting assembly, a roller chain assembly, a link, and a drive mechanism. The half housing includes a main plate, bent extensions on top, and a slit. The chain mounting assembly is between the main plates and includes two parallel frames, limit members each in the frame and having a slot, and a shuttle member between slots and having a bottom pawl. The roller chain assembly is between one set of the frame and the limit member and the other set of the frame and the limit member. The roller chain assembly includes two sets of plate members each having a top tooth and a bottom hook; and rollers each driven through the plate members of two sets. The bifurcated link is secured to the shuttle member through the slits. The drive mechanism rotates the link.