Exercise apparatus

A modular portable exercise apparatus comprising:

• a pair of rigid unitary frame structures, each frame structures comprising:
• i. an elongated base member (21) dimensioned and configured to support the frame structure on a horizontal surface;
• ii. a pair of spaced-apart generally parallel upright members (22) extending vertically from an upper surface of the base member and joined together by a top member (28);
• iii. a top member (28) extending between and joined to the upper ends of the upright members (22) and parallel to the base member (21);
• b. a bottom plate (60) that is attached to an interior face of a first of the two base members and configured for rotational movement from a first storage position that is generally parallel to upright members (22) and rotatable to a use position that is parallel to the horizontal surface, the bottom plate having a flange (114) extending from the upper surface, the flange being dimensioned and configured to rest upon a portion of the upper surface of the second of the two base members that is generally co-extensive with the horizontal space between the pair of upright members (22), the flange of the bottom plate adapted pass to a plurality of threaded fasteners (61, 62) that are received in the upper surface face of the supporting base member (21) to secure the bottom plate to the second of the base members in fixed relation;
• and
• C. at least one upper cross bar (48), the opposite ends of the cross bar being securely attached to generally U-shaped rectilinear protective collars (26, 36) defined by opposing arms joined by an integral linking section, the protective collars being configured and dimensioned to slidingly engage the top members in close-fitting relation to securely maintain the frame structures in a predetermined spaced-apart parallel relation, each of the protective collars adapted to receive at least one locking pin that passes through the opposing arms and an aligned passageway in the respective adjacent top member.