Combination type support rack structure

A combination type support rack structure, comprising:

• multiple upright support posts, at least one separation board mounted between the support posts, and multiple support and securing devices mounted on the support posts for supporting and securing the separation board, wherein:
• each face of each of the support posts is formed with at least one insertion groove;
• each of the support and securing devices includes an insertion block received in the insertion groove, an ear seat protruded outward from a side of the insertion block, and a plate block pivotally mounted on the ear seat in an eccentric manner;
• the plate block of each of the support and securing devices is pivoted upward, whereby a gap is formed between an end face of a first end of the plate block and the surface of the support post, so that the insertion block of each of the support and securing devices can slide in the insertion groove of the support post to a predetermined position;
• the plate block of each of the support and securing devices can be pivoted downward, whereby the end face of the first end of the plate block is urged on the surface of the support post, so that the insertion block of each of the support and securing devices is secured in the insertion groove of the support post and the plate block of each of the support and securing devices is positioned on the surface of the support post;
• the plate block of each of the support and securing devices has a stepped second end formed with a positioning hole, and the separation board has a bottom face formed with multiple stepped concave portions for receiving the stepped second end of the plate block and each said concave portion being provided with a lug to be secured in the positioning hole of the stepped second end of the plate block.