Stopper for preventing movement of a bag equipped with casters

1. A stopper for preventing movement of a bag equipped with casters comprising:

a base mounted on the bottom surface of the bag;

a swingable member having one end portion rotatably connected to the base, and having the other end portion capable of being manipulated so as to swing the swingable member between a housing position where the other end portion is positioned close to the base and an engagement position for engaging the other end portion with the ground;

a first link having one end portion rotatably connected to the swingable member, and having the other end portion rotatably and slidably connected to the base and slidable along the bottom surface of the base in response to the swinging movement of the swingable member; and

a second link having one end portion rotatably connected to the other end portion of the first link, and constructed so as to be slidable with the other end portion of the first link along the bottom surface of the base, the second link having an engaging portion;

the base having an engaged portion to be engaged with the engaging portion to thereby maintain the swingable member in the engagement position;

the other end portion of the second link being manipulatable to release the engagement between the engaging portion and the engaged portion and being disposed in an advanced position enabling an engagement release manipulation when the swingable member is in the engagement position; and

when the swingable member is in the housing position, the other end portion of the second link being disposed in a retracted position so as to be hidden by the base, and the swingable member and the first link being disposed along the bottom surface of the base.

2. The stopper according to claim 1 wherein the other end portion of the swingable member is provided with a rubber engagement member on a ground contact surface thereof to be engaged with the ground.

3. The stopper according to claim 1 further comprising a second biasing member which biases the engaging portion toward the engaged portion so as to move the engaging portion swingably around the one end portion of the second link and engage the engaged portion with the engaging portion.

4. The stopper according to claim 1 further wherein the swingable member comprises a housing portion in which the first link and second link are housed when the swingable member is in the housing position.

5. A bag equipped with casters comprising the stopper of claim 1 .