Case for storing a grinding wheel

A case for storing a grinding wheel which comprises an annular support member having an upper end face, lower end face, outer side face and inner side face and a grinding means provided on the lower end face of the support member, wherein

• the case includes a first case member and a second case member, and the first case member and the second case member are connected to each other by a hinge member in such a manner that they can freely pivote relative to each other, and selectively set to a close state for defining a closed storage space in cooperation or to an open state for opening the storage space;
• a receiving means is provided on the first case member and a restricting means is provided on the second case member;
• and
• when the upper end face of the support member is placed on the receiving means of the first case member by setting the first case member and the second case member to the open state and then the first case member and the second case member are set to the close state, the restricting means of the second case member contacts to either one of the inner side face, lower end face and outer side face of the support member, whereby the support member is held between the receiving means and the restricting means and the grinding wheel is stored in the storage space, without contacting the first case member and the second case member to the grinding means.