Air-Cushioning Material and Bag For Transporting Packaging Object

Abstract

An air-cushioning material comprises a first air chamber that constitutes a bottom portion of a storage portion for storing a packaging object, and a second air chamber that constitutes a peripheral wall portion of the storage portion. The first air chamber comprises a valve capable of injecting and evacuating air, and an upper face portion in which a vent hole is formed, the first air chamber and the second air chamber are communicated each other via the vent hole. The second air chamber bulges into the storage portion, when the second air chamber is filled, via the vent hole, with air injected into the first air chamber via the valve. Thereby, sufficient air can fill the portion that constitutes the bottom portion of a storage portion where the packaging object is stored, and the cushioning effect of air can be effectively exerted, so that the packaging object can be effectively prevented from being damaged or the like on account of, for instance, external impacts.

1 . An air-cushioning material, comprising:
 a first air chamber that constitutes a bottom portion of a storage portion for storing a packaging object; and a second air chamber that constitutes a peripheral wall portion of the storage portion,   wherein the first air chamber comprises a valve capable of injecting and evacuating air, and an upper face portion in which a vent hole is formed,   the first air chamber and the second air chamber are communicated with each other via the vent hole, and   the second air chamber bulges into the storage portion as the second air chamber is filled, via the vent hole, with air injected into the first air chamber via the valve.   
     
     
         2 . The air-cushioning material according to  claim 1 , wherein the upper face portion of the first air chamber is supported by a support portion in the first air chamber so as to prevent the upper face portion of the first air chamber from bulging excessively into the storage portion. 
     
     
         3 . The air-cushioning material according to  claim 1 , wherein an opening area of the vent hole of the upper face portion of the first air chamber is set in such a manner that air injected into the first air chamber via the valve flows into the second air chamber while filling up the first air chamber to such an extent that the packaging object stored in the storage portion can be supported. 
     
     
         4 . The air-cushioning material according to  claim 1 ,
 wherein the first air chamber has a substantially rectangular shape in a plan view,   the valve is provided on one side face portion in a short side of the substantially rectangular shape in a plan view, and   the vent hole is formed in the upper face portion, on a side of another side face portion opposing the one side face portion.   
     
     
         5 . The air-cushioning material according to  claim 1 ,
 wherein the support portion is a tubular member provided with at least one vent hole on a peripheral face thereof, and   one end of the tubular member is bonded to the upper face portion and another end of the tubular member is bonded to a bottom face portion of the first air chamber.   
     
     
         6 . The air-cushioning material according to  claim 5 , wherein an opening area of the vent hole of the tubular member is greater than an opening area of the vent hole of the upper face portion of the first air chamber. 
     
     
         7 . The air-cushioning material according to  claim 1 , wherein a hard-elastic plate-like member is provided outside the bottom face portion of the first air chamber. 
     
     
         8 . A bag for transporting a packaging object, comprising: the air-cushioning material according to  claim 1 ; and a bag body capable of storing therein the air-cushioning material. 
     
     
         9 . The bag for transporting a packaging object according to  claim 8 , wherein a hole is provided in the bag body in such a manner that the valve of the air-cushioning material can be exposed outside. 
     
     
         10 . The bag for transporting a packaging object according to  claim 9 , wherein the bag body comprises a cover portion capable of covering the valve of the air-cushioning material. 
     
     
         11 . The bag for transporting a packaging object according to  claim 8 , wherein mutually lockable locking members are provided in the air-cushioning material and the bag body.