Fastening device

A fastening device for attaching a structural member to a support member, said device comprising:

• a lower portion having a shank portion attachable to the support member,
• an upper portion having a radial flange at an outer side and an axial passage passing through the upper portion on an inner side,
• at least one outer side of the shank portion having an axially parallel extending row of saw-tooth-shaped teeth,
• a resilient pawl being formed at the axial passage for cooperating with the row of teeth in a ratchet manner, when the upper portion is pushed onto the shank portion in a first direction, to block a relative displacement of the upper and lower portions in a second, opposite direction,
• a safety nose at an end of the passage of the upper portion, the nose engaging axially a parallel outer recess of the shank portion when the upper portion is pushed onto the shank portion,
• a stop in the recess for limiting a movement of the safety nose, and
• an axially parallel arm on a wall of the shank portion facing the safety nose,
• wherein said arm has
• a first, free end adapted to cooperate with one side of a thread of a bolt, and
• a second end being located opposite to the safety nose to free the safety nose from the stop when the arm is radially outwardly deformed away from the thread of the bolt,
• wherein
• the axial passage of the upper portion is configured to receive the shank portion from a first end of the shank portion,
• the upper portion is removable through a second end of the shank portion opposite to the first end in the first direction, and
• the shank portion has a further axial passage.

A fastening device for attaching a structural member to a support member, said device comprising:

• a lower portion having a shank portion attachable to the support member,
• an upper portion having a radial flange at an outer side and an axial passage passing through the upper portion on an inner side,
• at least one outer side of the shank portion having an axially parallel extending row of saw-tooth-shaped teeth, and
• a resilient pawl being formed at the axial passage for cooperating with the row of teeth in a ratchet manner, when the upper portion is pushed onto the shank portion in a first direction, to block a relative displacement of the upper and lower portions in a second, opposite direction,
• wherein
• the axial passage of the upper portion is configured to receive the shank portion from a first end of the shank portion,
• the upper portion is removable through a second end of the shank portion opposite to the first end in the first direction,
• the shank portion includes
• a through hole passing through the lower portion from the first end of the shank portion to the second end of the shank portion,
• inner locking portions circumferentially equally spaced in the through hole, and
• guiding bridges provided between the inner locking portions.