Device for manually opening a wedge breechblock and gun equipped with such a device

A gun having a wedge breechblock with a manual breechblock opening device that actuates a breechblock lever to open said wedge breechblock against an elastic return force, said breechblock opening device comprising:

• a manual control member;
• a drivetrain having a rotating output shaft coupled to said breechblock lever and a rotating input shaft coupled to said output shaft and coupleable to said manual control member, wherein actuating said manual control member rotates said drivetrain in a first rotational direction and causes said output shaft to engage said breechblock lever and to open said wedge breechblock;
• and
• a blocking member coupled to said drivetrain and disposed to allow said drivetrain to rotate in said first rotational direction and to prevent said drivetrain from rotating in a second rotational direction opposite said first rotational direction.

A manual breechblock opening device that actuates a breechblock lever to open a wedge breechblock of a gun against an elastic return force, said breechblock opening device comprising:

• a selectively removable manual control member;
• a drivetrain having a rotating output shaft coupled to said breechblock lever and a rotating input shaft coupled to said output shaft and coupleable to said manual control member, wherein actuating said manual control member rotates said drivetrain in a first rotational direction and causes said output shaft to engage said breechblock lever and to open said wedge breechblock;
• and
• a blocking member coupled to said drivetrain and disposed to allow said drivetrain to rotate in said first rotational direction and to prevent said drivetrain from rotating in a second rotational direction opposite said first rotational direction.