Cushioning member for packed object

1 . A cushioning member disposed inside a side of a packing frame surrounding a packed object, the cushioning member being provided to protect the packed object secured on an inner bottom of the packing frame, the cushioning member comprising:

a first cushioning member that has a front face disposed adjacent to the packed object and a back side opposite to the front face; and

a second cushioning member that has an upper end in contact with the back side of the first cushioning member and a bottom disposed near the side of the packing frame,

wherein the first cushioning member is made of a foam material, and the second cushioning member comprises a corrugated board assembly,

wherein the first cushioning member comprises a body that has the front face and the back side and extends in a longitudinal direction with a first width and a plurality of leg portions projected on the back side of the body at intervals in the longitudinal direction,

the second cushioning member has a bottom wall extending in the longitudinal direction, a pair of side walls connected on both sides of the bottom wall via folding portions, and a plurality of bridge portions that bridge the pair of side walls at multiple points spaced in the longitudinal direction such that the bottom wall and the side walls form a channel extending in the longitudinal direction with a second width larger than the first width, and two adjacent ones of the plurality of bridge portions and the pair of side walls form a socket portion that holds one of the leg portions in a state in which upper ends of the bridge portions are in contact with the back side of the first cushioning member.

2 . The cushioning member according to claim 1 , wherein a clearance is formed between an end of the one of the leg portions and the bottom wall in a state in which the upper ends of the bridge portions are in contact with the back side of the first cushioning member.

3 . The cushioning member according to claim 2 , wherein the leg portions of the first cushioning member are provided in an intermediate part other than the two ends of the body in the longitudinal direction, and the body of the first cushioning member has recess portions each extending in a width direction on the back side adjacent to the one of the leg portions such that each of the recess portions defines a gap between the back side and the upper end of the bridge portion.

4 . The cushioning member according to claim 3 , wherein each of the recess portions has a slope that decreases in depth as a distance from the one of the leg portions increases.

5 . The cushioning member according to claim 4 , wherein each of the recess portions has a maximum depth smaller than the clearance between the end of the one of the leg portions and the bottom wall.

6 . The cushioning member according to claim 1 , wherein each of the bridge portions has a pair of engaging portions that are engaged with the pair of side walls to bridge the pair of side walls, and each of the engaging portions includes an engagement tab extending laterally to be engaged into a slit extending from an upper end of the side wall toward the bottom wall.

7 . The cushioning member according to claim 6 , wherein the engagement tab of each of the bridge portions further includes an extended portion that is extended over the slit so as to form an engagement slot to be engaged with a portion under the slit of the side wall.

8 . The cushioning member according to claim 1 , wherein the bottom wall and the pair of side walls of the second cushioning member are formed by a first corrugated cardboard blank such that a flute direction of the first corrugated cardboard blank is orthogonal to the longitudinal direction, and the plurality of bridge portions are formed by a plurality of second corrugated cardboard blanks such that a direction from the upper end to a lower end serves as a flute direction.