Pack unit and mounting means therefor

A pack unit adapted to be mounted on the hub structure of a rotary finishing wheel, said hub structure including a plurality of circumferentially spaced, elongated slots about the periphery thereof, each of said slots having an inner portion and a restricted neck passage opening outwardly therefrom, each of said slots further including a longitudinal slot axis substantially parallel to the rotational axis of said finishing wheel, said pack unit comprising at least one flap-like member of finishing material having a radially outer portion adapted for engaging a workpiece and a radially inner portion adapted to be clampably secured;

• a unitary, integrally-formed, elongated clip member including a clip body, a pair of radially outwardly extending clamping arms adapted for clampably receiving the radially inner portion of said flap-like member therebetween, the radially inner portion of said clip body being provided with an elongated, radially inwardly disposed slot having an inner portion and a restricted neck passage opening outwardly therefrom;
• and a unitary link member having a first slot-engaging solid head portion telescopically received within the elongated slot of said clip member, a second slot-engaging solid head portion adapted to be telescopically received within an elongated slot of the hub structure, and an intermediate portion integrally interconnecting said head portions, the end segment of said intermediate link portion adjacent said first head portion being telescopically received within the restricted neck passage of said slot in said clip body and the end segment of said intermediate link portion adjacent said second head portion being adapted to be telescopically received within the restricted neck passage of the selected slot in the hub structure such that said link member telescopically mounts said clip member carrying said flap-like member to the hub structure, at least one of said first and second slot-engaging head portions of said link member is adapted to be telescopically received within its respective slot for sliding movement in a direction parallel to said rotational axis to effect the assembly, removal and replacement of said pack unit, said second head portion is adapted to be removably retained axially within an elongated slot of the hub structure, both the elongated slots of the hub structure and the elongated slot of said clip member are key-hole-type formations whose inner portions are quasi-cylindrical in configuration and wherein said link member has a dumb-bell-shaped cross-section, said first and second slot-engaging head portions having a corresponding quasi-cylindrical shape adapted to be matedly received in their respective slots, each of said first and second quasi-cylindrical, slot-engaging head portions includes an elongated re-enforcing rod centrally disposed therein with the longitudinal axii of said rods being parallel to said slot axii.

In a rotary finishing wheel having a hub structure adapted to be mounted to a shaft for rotation therewith, said shaft having a rotational axis and said hub structure being provided with a plurality of circumferentially spaced, quasi-cylindrical, key-hole-type, slot-defining formations about the periphery thereof, each of the defined elongated slots having a longitudinal slot axis parallel to said slot axis, and a plurality of modular and replaceable pack units mounted to said hub structure, each of said pack units including at least one flap-like member of finishing material having a radially outer portion adapted to engage a workpiece and a radially inner portion, an improved pack unit mounting means for each of said pack units comprising an elongated clip member having means disposed adjacent the radially outer portion thereof for fixedly securing said radially inner portion of said flap-like member to said clip member and means disposed adjacent the radially inner portion thereof for defining a quasi-cylindrical, key-hole-type, elongated slot having an axis generally parallel to said rotational axis;

• and an elongated link member having a dumb-bell-shaped configuration as viewed on a cross-section taken perpendicular to said rotational axis, said link member having a first solid head portion of generally quasi-cylindrical configuration slidably received within the slot of said elongated clip member for axial movement therein for assembling, removing, and replacing said clip member and the flap-like member fixedly secured thereto, a second oppositely disposed solid head portion of generally quasi-cylindrical configuration slidably received within an elongated slot of said hub structure for axial movement therein for assembling, removing, and replacing said pack unit, and an intermediate link portion connecting said first and second head portions.