Cushioning member for packed object
A cushioning member for protecting a packed object, the cushioning member being designed to have an excellent cushioning effect with a small form and advantageously reduce industrial waste. The cushioning member includes a first cushioning member made of a foam material with a front face disposed adjacent to a packed object and a back side extending with a first width in the longitudinal direction on the opposite side from the front face, and a second cushioning member including a corrugated board assembly. The first cushioning member is fixed on the second cushioning member in a state in which the back side is in contact with the upper ends of the bridge portions.
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 made of a foam material having a front face disposed adjacent to the packed object, a back side extending in a longitudinal direction with a first width on an opposite side from the front face, a side extending between a side edge of the back side and the front face, and an end face extending between an end edge of the back side in the longitudinal direction and the front face; and
a second cushioning member comprising a corrugated board assembly, the second cushioning member having 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 extend between the pair of side walls so as to bridge the pair of side walls and extend in a direction perpendicular to the bottom wall, the second cushioning member being configured such that the bottom wall and the side walls form a channel extending in the longitudinal direction with a second width that is the same as or larger than the first width,
wherein the first cushioning member is fixed on the second cushioning member in a state in which the back side is in contact with upper ends of the bridge portions in a range of the channel.
2 . The cushioning member according to claim 1 , wherein the second cushioning member includes a pair of end flaps connected on both sides of the bottom wall via folding portions, and the first cushioning member is fixed on the second cushioning member by joining or engaging the end flap onto the end face.
3 . The cushioning member according to claim 2 , wherein the bottom wall, the pair of side walls, and the pair of end flaps 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 the perpendicular direction serves as a flute direction.
4 . The cushioning member according to claim 3 , wherein the bridge portion has a pair of engaging portions that are engaged with the pair of side walls to bridge the pair of side walls, and the engaging portion 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.
5 . The cushioning member according to claim 4 , wherein the engagement tab of the bridge portion further includes an extended portion that extends over the slit so as to form an engagement slot to be engaged with a portion under the slit of the side wall.
6 . The cushioning member according to claim 1 , wherein a length from the upper end to a lower end of the bridge portion is shorter than a length from the upper end to a lower end of the side wall, and a clearance is formed between the lower end of the bridge portion and the bottom wall.