Supporting device for rail member

A supporting device for a rail member, comprising:

• a first supporting frame having a first supporting means comprising an upper element and a lower element, the upper element comprising a first supporting part, the lower element comprising a second supporting part, a supporting passage being defined by the upper element and the lower element;
• and
• a second supporting frame having a second supporting means comprising a third supporting part and a fourth supporting part, the first supporting means and the second supporting means being configured to support each other;
• wherein the rail member comprises a first rail and has a first side and a second side opposite to the first side, the first side of the rail member is formed with a slide rail passage for accommodating the first rail in order to allow the first rail to slide within the slide rail passage of the rail member, the second side of the rail member is configured to be connected to the first supporting frame, the first supporting part of the first supporting frame is configured to support the third supporting part of the second supporting frame, and the second supporting part of the first supporting frame is configured to support the fourth supporting part of the second supporting frame;
• wherein the upper element is spaced from and not directly connected to the lower element, and the upper element and the lower element are formed as two independent parts of the first supporting frame;
• wherein the upper element and the lower element of the first supporting means have an identical shape and are disposed on the second side of the rail member.