Gas pressure testing device for a gas compartment portion of a bag

摘要

A gas pressure testing device, which is for checking pressure of gas inside the gas compartment portion of a bag, including: a pressing member (31) disposed on one side of the bag, a receiving member (38) positioned on another side of the bag, and a movable support member (39) having thereon the pressing member and a distance sensor (32). The pressing member being kept urged toward the gas compartment portion by air cylinder (44) is moved toward the bag so that the gas compartment portion is sandwiched by the pressing member and the receiving member. The distance sensor measures the distance (D) at such time to the pressing member and sends a distance signal to a control unit (37). Based on the distance signal, the control unit determines whether or not the gas pressure in the gas compartment portion is within a preset range.

主权项

1. A gas pressure testing device for checking the pressure of gas charged in a gas compartment portion of a bag in which the gas compartment portion is formed integrally therein and extends in a longitudinal direction in a sealed side edge portion of the bag, said gas pressure testing device being comprised of a measuring unit and a control unit,
wherein said measuring unit is comprised of:
a pressing member which is disposed on one side of a bag equipped with a gas compartment portion and suspended by being clamped at top portions of two lateral edges of the bag by a pair of grippers and which is moved forward and backward in a thickness direction of the bag to press the gas compartment portion when moved forward,a receiving member which is disposed on another side of the bag and is positioned in a receiving position on a back side of the gas compartment portion,a support member which supports the pressing member on a rear side of the pressing member so as to move the pressing member in a forward or rearward direction while urging the pressing member forward,a drive source which moves the support member forward and rearward through a predetermined stroke, anda distance sensor which is provided on the rear side of the pressing member, is moved forward and backward together with the support member by the drive source, and measures a distance to the pressing member; andsaid distance sensor measures a distance between the distance sensor and the pressing member when the pressing member is moved forward by the support member moved forward by the drive source and sandwiches the gas compartment portion between the pressing member and the receiving member which is positioned in the receiving position; and wherein said control unit determines whether or not a pressure of gas that is filled in the gas compartment portion is within a preset range based on signals from the distance sensor.