Abstract: A heat insulating structure having a lower case whose top surface is arranged to be an opening through which goods are inserted and withdrawn and an upper case whose front surface is arranged to be an opening through which goods are inserted and withdrawn, the upper and lower cases each being formed by inner and outer boxes leaving a gap therebetween the heat insulating structure comprising: two pour holes formed in a wall of the upper case; a passage for establishing communication between the gaps of the upper case and the lower case; a heat insulating pipe having an end portion communicating with one of the pour holes of the upper case and extending from the one pour hole and through the gap of the upper case and having its other end portion communicating with the gap of the lower case; foam heat insulating material is injected, in the form of a foaming agent, through the other pour hole of the upper case to the gap of the upper case so as to foam and solidify; and foam heat insulating material in the form

Abstract: A low-temperature show case comprising an upper case having a front opening to be covered with revolving transparent glass doors, and a lower case having upper opening to be covered with slidable transparent glass doors, said upper case being constructed in the form of oriel with its transparent side walls oriented oblique towards the front opening, and being provided with an outlet for effusing cold air to form an air curtain just behind the opening, the outlet having larger width than the front opening so as to prevent the ambient air to flow into the case.