Ladder frame with steel pipes movably coiled

A ladder frame with steel pipes movably coiled comprises a support and a riding track ladder. The support comprises vertical rods, horizontal rods, inclined rods, fastening discs and pins. The ends of the horizontal rods and the ends of the inclined rods are each provided with a transverse notch and a vertical slot. Connecting holes are circumferentially distributed in the fastening discs. Inner holes with the diameter matched with that of the vertical rods are formed in the centers of the fastening discs, so that the vertical rods are sleeved with the fastening discs. The fastening discs are inserted in the transverse notches of the ends of the horizontal rods and the inclined rods. The vertical slots of the ends of each horizontal rod and the corresponding inclined rod are aligned with one connecting hole of the corresponding fastening disc and one pin penetrates through the vertical slots and the connecting hole for locking operation. The connecting holes of the fastening discs and the vertical slots of the ends of the horizontal rods and the inclined rods are characterized in that the two ends are narrower than the middle portions and the upper portions are larger than the lower portions and notches are formed in the ends facing the vertical rods. The pins are banana-kidney-shaped pins and the two transverse sides of the section are narrower than the middle, the upper portions are larger than the lower portion, and the section is matched with the corresponding vertical slots and the corresponding connecting hole. The ladder frame is simple in structure and convenient to manufacture, the whole steel pipe support can be stably supported without welding the fastening discs to the vertical rods, the machining amount of fastening disc welding is reduced, the height is adjustable, flexibility is achieved, and the fastening integrality of a platform board of the riding track ladder and the horizontal rods of the ladder frame is good.