Lid device and image forming apparatus

1. A lid device comprising:

a main body;

an opening/closing member that is attached to the main body so as to be opened and closed;

a support portion that is provided on the main body, and that supports the opening/closing member in such a manner which the opening/closing member is disengaged from the main body when receiving force of opening the opening/closing member beyond a predetermined opening/closing angular range; and

a fall preventing member that prevents the opening/closing member disengaged from the support portion from coming off the main body.

2. The lid device according to claim 1 , wherein

the opening/closing member includes a rotary shaft which rotates when the opening/closing member is opened or closed, and

the fall preventing member has a shape which surrounds the rotary shaft partially.

3. The lid device according to claim 1 , wherein

the fall preventing member is deformed elastically so as to return to an original state which is defined with respect to the main body.

4. The lid device according to claim 1 , further comprising:

closing action preventing portion that disables an action of closing the opening/closing member which is disengaged from the support portion.

5. The lid device according to claim 1 , wherein

the support portion includes a recess and a spherical portion which is fitted in to the recess.

6. An image forming apparatus comprising:

a space in which a container containing an image forming material is disposed in a detachable manner, and

the lid device according to claim 1 , wherein

the lid device closes the space with the opening/closing member, and

the main body includes the image forming apparatus.