JPS5849982Y2 - Thermal box - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat insulating box consisting of a body having double side walls and a double bottom, and a lid thereof.

Such thermal insulation boxes are generally molded from synthetic resin, and have good heat insulation properties due to the presence of an air layer occupying the space between the double side walls and the double bottom, or a synthetic resin foam layer filled in the space. However, when articles to be kept warm or cold are housed in the main body, this heat insulation structure alone is not necessarily sufficient to keep the heat insulated.

For this reason, for example, when cooked rice is stored directly or in a lunch box, the slowly cooled steam gradually turns into water droplets, which impairs the flavor of the cooked rice.

In the present invention, the inner wall of the main body consisting of double side walls and a double bottom is provided with a protrusion or recess that can engage with a recess or protrusion provided on the side surface of a heat-insulating liquid tank installed at the bottom of the main body. Since the insulating box is constructed with a lid, the presence of hot or cold water in the insulating liquid tank further improves heat retention, and the insulating liquid tank is held so that it does not rattle during transportation. Ru.

FIG. 1 of the drawings is a plan view of one embodiment of the heat-insulating box according to the present invention, FIG. 2 is a cross-sectional view taken along the line I--I, and FIG. 3 is a right side view of the heat-insulating liquid tank.

The main body of the insulation box has double side walls 1, 1' and a double bottom 2゜2.
', and a handle 3 is provided on the back side of the upper periphery of the short side.

The heat-retaining liquid tank 4 installed at the bottom of the main body has a screw stopper 5 for a liquid inlet, and has, for example, recesses 6, 6', etc. surrounding the main body in the longitudinal direction. , these recesses are in a state in which they can engage with protrusions 7, 7', .

This engaged state may have an opposite uneven relationship.

Therefore, when pouring hot or cold water into this heat-retaining liquid tank, especially a heat-retaining liquid tank with a concave upper surface, to increase the heat-retaining effect, it is necessary to prevent water droplets from adhering to cooked cooked rice, or to prevent spoilage. can be effective,
Moreover, the fixation of the liquid tank is also ensured during transportation.

[Brief explanation of drawings]

FIG. 1 is a plan view of one embodiment of the heat insulation box according to the present invention. FIG. 2 is a sectional view taken along the line II. FIG. 3 is a right side view of the heat-retaining liquid tank. In these drawings, 1 is a double side wall, 2 is a double bottom, 4 is a heat-retaining liquid tank, 6 is a recess surrounding the body in its longitudinal direction, and 7 is a convex portion provided on the inner wall of the body. Instruct each.

Claims (1)

[Scope of utility model registration request] A lid equipped with a convex part or concave part that can be engaged with a concave part or convex part provided on the side surface of a heat-insulating liquid tank installed at the bottom of the main body, on the inner wall part of the main body consisting of double side walls and a double bottom. Thermal box.