JPH0728859U - Lid opening device for containers - Google Patents

Abstract

(57) [Summary] [Purpose] When the inside of the container is evacuated, the lid can be easily opened.
And prevent the lid from being pushed open by heating. [Structure] Fitting groove 2 that fits into opening edge 11 of container 10
1 is provided on the lower peripheral edge of the lid body 20, and engaging portions 12 and 23 which can be engaged with each other when the lid is closed are formed on the outer surface of the opening edge 11 and the inner surface of the opening edge 11 opposite thereto. Further, a push-up protrusion 13 that abuts and pushes up against the outer edge portion 22 of the opening edge 11 from below is provided on the knob 14 on the outer side of the container 10.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a container for containing food or the like.

[0002]

[Prior art]

 It is a common experience that when a container containing warm food is stored in a refrigerator, the inside of the container is cooled and a vacuum is applied to close the lid, making it difficult to open. On the contrary, if a container containing cold food is heated in a microwave oven, the lid may be blown off due to expansion. In the case of a sealed container used for a lunch box or the like, a vent valve is provided to cope with the pressure difference between inside and outside. However, no countermeasures are known for containers without vent valves.

[0003]

[Problems to be solved by the device]

 The present invention has been made in view of the above points, and its problem is to solve the problems of the lid being opened by cooling and the lid being removed by heating.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention provides a downward fitting groove 21 that fits into the opening edge 11 of the container 10 on the lower peripheral edge of the lid body 20 to form the fitting groove 21, and the opening edge 11 By forming engaging portions 12 and 23 capable of engaging with each other on the inner surface of the edge portion 22 located on the outer side of and the outer surface of the opening edge 11, respectively, and contacting the edge portion 22 from below and pushing it up. A push-up protrusion 13 that removes the lid 20 to allow ventilation inside and outside the container is provided on the knob 14 on the outside of the container 10.

[0005]

【Example】

 The figure illustrates the case where the present invention is applied to a food container, and the container comprises a container 10 having an upward opening and a lid 20 covering the opening. The illustrated container 10 and lid 20 are both formed by synthetic resin molding.

The container 10 has an opening edge 11 having a constant height along the upper end of the opening, and a fitting groove 21 formed in a downward U-shape so as to fit into the opening edge 11 of the lid 20. It is provided on the lower edge. The fitting groove 21 and the opening edge 11 of the fitting groove are fitted to each other so as to keep the inside and the outside of the container in a substantially sealed state, but between the outer surface 11a of the opening edge 11 and the inner surface 22a of the edge portion 22 that constitutes the fitting groove 21. There is a small gap in.

One or a plurality of projecting engagement portions 12 are provided on the outer surface 11a of the opening edge 11 which faces the gap and is located in the fitting groove 21 when the lid is fitted, and when the lid is fitted. A lid side engaging portion 23 that engages with the container side engaging portion 12 is provided on the inner surface 22 a of the lid body edge portion 22. The lid side engaging portion 23 is provided over the entire area of the lid edge portion 22 so that it can be engaged regardless of the orientation of the lid body, and the edge portion 22 has a width and enhances its strength. It also serves as a part of the edge.

When the lid body 20 is pushed up by the lid opening operation, these engaging portions 12 and 23 have an opposite positional relationship, and the lid side engaging portion 23 is locked on the container side engaging portion 12. To do so. Therefore, the protrusion degree of both engaging portions 12 and 23 is set within the range of the gap.

A push-up protrusion 13 for contacting the edge portion 22 from below and pushing it up is provided by using a knob 14 formed on the outside of the container 10. The knobs 14 are integrally molded on both sides of the container 10 when the container 10 is molded. The knobs 14 project outward substantially horizontally below the engaging portion 12 and have a flat C-shaped or U-shaped through groove 15. Is formed in the knob 14 and the upper end of the inside thereof is pushed up to form the protrusion 13. The small piece 16 surrounded by the through groove can push the tip end side upward with the thin hinge portion 17 as the center. Reference numeral 16a denotes an operation portion which projects downward.

In the device of the present invention configured as described above, the fitting groove 21 of the lid body 20 is fitted into the opening edge 11 of the container 10 to obtain an action of facilitating the opening of the container in a substantially sealed state. It is done. That is, even if the inside is evacuated, the lid 20 is easily pushed up by pushing the pushing-up piece 13 facing the peripheral edge 22 of the lid 20 from below, and the engaging portion 23 is placed above the engaging portion 12. And keep that state (see the chain line in FIG. 4). Therefore, the microwave oven can be used for heating without removing the lid 20.

[0011]

[Effect of device]

 Since the present invention is constructed and operates as described above, it is easy to open a container whose inside is evacuated by cooling, and it can escape even if the internal pressure rises due to heating. There is a feature that the same effect can be obtained without incorporating the valve mechanism.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view of a container provided with the device of the present invention.

FIG. 2 is a side view showing a part of the same container in section.

FIG. 3 is a perspective view showing an embodiment of the device of the present invention.

FIG. 4 is a sectional view of the same.

Claims (3)

[Scope of utility model registration request] 1. A container 10 made of synthetic resin having an open upper surface.
And a lid 20 that covers the opening of the lid, wherein a downward fitting groove 21 that fits into the opening edge 11 of the container 10 is provided in the lower peripheral edge of the lid 20. Ditch 21
And an engaging portion 1 capable of engaging with each other on the inner surface of the edge portion 22 located outside the opening edge 11 and the outer surface of the opening edge 11.
2 and 23 are formed respectively, and push-up protrusions 13 are provided on the knob 14 on the outside of the container 10 so as to contact the edge portion 22 from below and push up the edge portion 22 to remove the lid body 20 to allow ventilation inside and outside the container. A lid opening device for a container characterized by the above. 2. The knob 14 is integrally molded when the container 10 is molded, and a through-hole 15 having a substantially C-shaped plane is formed in the knob 14 and surrounded by the hole 15. Small piece 16
The container lid opening device according to claim 1, wherein a push-up protrusion 13 is provided at a tip portion of the container. 3. The engaging portions 12, 23 have a structure in which the lid side engaging portion 23 is locked on the container side engaging portion 12 and the lid body 2 is closed after the lid body 20 is pushed up. Claim 1 having
A container lid opening device according to the item.