Side sill rigidity reinforcement structure for vehicle

A side sill rigidity reinforcement structure for a vehicle, the side sill rigidity reinforcement structure comprising:

• a side sill inner;
• a side sill outer disposed outside the side sill inner and bonded to the side sill inner;
• and
• a side sill reinforcement member installed in a space between the side sill inner and the side sill outer,
• wherein the side sill reinforcement member comprises a plurality of portions each having a closed section formed to penetrate in a width direction of the vehicle, and portions of the plurality of portions are repeatedly formed in a longitudinal direction of the vehicle,
• wherein the side sill reinforcement member further comprises:
• an upper reinforcement member bonded to at least one of an inside surface of an upper surface portion of the side sill inner or an inside surface of the upper surface portion of the side sill outer,
• wherein the upper reinforcement member is formed with a plurality of upper side sill bonding portions at intervals therebetween, and each upper side sill bonding portion is convexly formed to be bonded to at least one of the inside surface of the upper surface portion of the side sill inner or the inside surface of the upper surface portion of the side sill outer,
• wherein a strength reinforcement groove formed at a predetermined depth in the width direction of the vehicle is formed in at least one upper side sill bonding portion of the plurality of upper side sill bonding portions, and
• wherein the upper side sill bonding portion is formed to be inclined upward by a first predetermined distance along the width direction from an end adjacent to a widthwise outside of the vehicle, and after the first predetermined distance, formed to be inclined downward by a second predetermined distance along the width direction.