JPH05130Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a heat insulating container having a structure in which a synthetic resin foam heat insulating material is sealed in a space between an outer container and an inner container.

BACKGROUND ART Examples of this type of insulated container include large portable liquid containers and the like. These containers are double-walled containers, with a heat insulating material such as polyurethane foam sealed between the outer container and the inner container to provide a heat-retaining effect.

Therefore, when manufacturing these insulated containers,
The inner container is housed in the outer container and held in a predetermined position, the polyurethane stock solution is injected into the space between the outer container and the inner container, and the polyurethane stock solution is foamed by heating as necessary. Polyurethane foam fills the cavity.

Problems that the invention aims to solve: However, when attempting to manufacture an insulated container using this method, external pressure is applied to the inner container due to the pressure when polyurethane foams, which may cause it to warp inward, reducing the container's capacity. . In particular, since the inner container comes into direct contact with the liquid, plastics such as polypropylene and polyethylene are often used for hygiene reasons, and are easily deformed when external pressure is applied. In particular, polyethylene is inexpensive and suitable for this purpose, but when polyethylene is used, it is relatively flexible and has a low softening point, so it becomes soft and easily deforms due to the heat generated during foaming of polyurethane.

If the inner container is deformed, the wall surface of the inner container will be distorted inward, so that the capacity of the container will become smaller and the capacity will vary.

The present invention was conceived in view of the above circumstances, and it is an object of the present invention to provide an inner container that is not easily deformed by the foaming pressure of the synthetic resin in the cavity.

Means for Solving the Problems The present invention provides an insulating container in which a synthetic resin foam heat insulating material is sealed in a space between an outer container and an inner container. It is characterized by having a protrusion that protrudes inwardly or outwardly on each side.

FIG. 1 shows a portable liquid container using the inner container of the present invention.

In FIG. 1, reference numeral 1 denotes an outer container 1 in which a body 2 and a shoulder body 3 are combined. An opening 4 is formed in the upper front end of the shoulder body 3, a short cylindrical part 5 is erected above the opening 4, and a spout 6 is formed in the front part of the short cylindrical part 5. There is.

The opening 4 is sealed with a stopper 7, a stopper 8 is fitted on the outside of the short cylindrical part 5, and a lid 9 is placed on the outside and is held by being screwed onto the shoulder body 3. .

Further, a handle 10 is rotatably attached to the rear portion of the upper surface of the shoulder body 3.

Furthermore, bosses 11 are protruded from both front and rear ends of the shoulder body 3, and a belt metal fitting 12 is secured to the bosses 11. As shown in FIG. 3, the belt fitting 12 is formed by bending a wire into a substantially inverted triangular shape, and the apex portion of the lower end thereof has an arc shape, and is rotatably fitted into the boss 11. Also, the upper side 14
is formed so that its central portion digs slightly downward, and both ends of the wire are abutted against each other at the central portion. By forming the belt metal fitting 12 in this way, the container can be attached to the belt 13.
When the container is hung, the upper side of the belt metal fitting 12 will not be distorted and opened due to the weight of the container, and the belt 13 will not come off from there.

Further, the belt fitting 12 has an arcuate portion extending over 180 degrees, and a protrusion 15 is formed on the body 2 or the shoulder body 3 below the boss 11 to prevent the belt fitting 12 from moving downward and coming off. It is better to do so. Further, at this time, it is desirable that the fitting portion of the boss 11 into which the arcuate portion fits is also formed into an arcuate portion.

Next, 17 is an inner container. An opening 18 is formed at the upper front end of the inner container 17.
A short cylindrical portion 19 is erected at the upper part of the tube. This short cylindrical portion 19 is fitted into a double cylindrical portion 20 vertically disposed below the opening 4 of the outer container 1, and the gasket 21
is hermetically sealed.

A protrusion 22 extending in the vertical direction is formed on the outer circumferential wall of the inner container 17 so as to protrude inward. Note that this protrusion 22 may be formed on the outer peripheral wall of the inner container 17 in the circumferential direction, or may protrude outward.

In the space between the outer container 1 and the inner container 17,
A synthetic resin foam 23 such as polyurethane is filled as a heat insulating material. 24 in Figure 1 is
This is an injection port for injecting the synthetic resin stock solution, and after the stock solution is injected from here, this injection port 24 is closed, and if necessary, the stock solution is foamed by heating, and the space between the outer container 1 and the inner container 17 is Fill the void and harden it.

Function In the present invention, when a synthetic resin stock solution is injected into the space between the outer container 1 and the inner container 17 and foamed, external pressure is applied to the inner container 17 due to the foaming pressure of the synthetic resin. The protrusions 22 act as beams against the external pressure, and prevent the outer circumferential surface of the inner container 17 from bending inward.

In the example shown in the drawings, the front end portion of the inner container 17 is formed in a round shape, so this portion can withstand external pressure, the distortion that occurs is small, and there is no need to provide the protrusion 22. Therefore, it is sufficient to provide the protrusion 22 only on a flat portion or a portion formed with an extremely small curvature.

Effects of the Invention According to the present invention, since the inward distortion of the inner container 17 is small, the inner capacity of the container does not decrease and becomes stable.

In the present invention, the protrusions 22 may be directed in either the vertical direction or the circumferential direction, and may protrude either inwardly or outwardly. It is preferable to provide the protruding ridges 22 in the vertical direction.

When the protrusion 22 is provided to protrude outward, the outer container 1
In order to fit the inner container 17 into the opening of the body 2, the opening of the body 2 must be enlarged, and the distance between the protrusion 22 and the inner surface of the body 2 becomes smaller, resulting in a decrease in insulation performance. If a certain level of heat insulation performance is to be ensured, the overall distance between the outer container 1 and the inner container 17 must be increased, resulting in a reduction in capacity.
However, by making the protrusion 22 protrude inward,
Such problems do not occur, and it is possible to secure sufficient capacity and heat insulation performance.

Furthermore, by forming the protrusions 22 in the vertical direction, it becomes easy to clean the inside of the inner container 17 through the opening 4.

[Brief explanation of the drawing]

FIG. 1 is a central vertical sectional view of a heat-insulating container using the inner container of the present invention. FIG. 2 is a sectional view of the inner container in FIG. 1. FIG. 3 is an enlarged rear view showing the connecting portion between the boss and the belt metal fitting in FIG. 1. 1...Outer container, 17...Inner container, 22...Protrusion, 23...Foam.

Claims (1)

[Scope of utility model registration request] In a heat insulating container in which a heat insulating material made of synthetic resin foam 23 is sealed in a space between an outer container 1 and an inner container 17, projecting inwardly or outwardly at predetermined intervals on the outer peripheral surface of the inner container 17. An inner container of a heat-insulating container, characterized in that a protrusion 22 is formed.