JP3218049U - Packaging container lid - Google Patents

Abstract

The present invention provides a lid for a packaging container provided with a valve that can release steam but does not generate a gap with a light load that is stacked.
The present invention forms a valve body 12, 13 and 32 by providing a cut in the top plate portion 11 of the lid 10 by laser beam irradiation, and also provides a connection portion that does not make a cut in a part of the valve body. Configure. In another device, a plurality of connecting portions are provided. Moreover, the width | variety of a notch is comprised in 0.3-0.5 mm, and the length of a connection part is comprised in 0.3-0.5 mm. In still another device, the cut is provided by laser beam half-cut processing. Further, the uncut thickness by half-cut processing is set to 0.01 mm to 0.1 mm, and the width of the cut is set to 0.5 to 1.0 mm.
[Selection] Figure 8

Description

  The present invention relates to a lid for a food packaging container used for storing a lunch box or various cooked foods, and more specifically, includes a valve for releasing steam generated when heated in a microwave oven to the outside. In addition, the present invention relates to a lid for a packaging container capable of preventing insect mixture.

  At retail outlets such as supermarkets and convenience stores, lunch boxes and various cooked foods are packed and displayed in packaging containers.

  Such a packaging container includes a container main body configured to be able to store food, etc., a lid detachably attached to the opening of the container main body, and an opening of the container main body that contains the contents of the lid. The film packaging material which fixes a container main body and a cover body in the state attached to the part is provided.

  A packaging container that is film-wrapped after containing food or the like as described above is often heated using a microwave oven as it is film-wrapped.

  In a packaging container used for the above-mentioned purposes, water vapor generated when heated in a microwave oven is ensured so that the liquid juice of food contained in the container body does not leak outside. Therefore, it is required to release water vapor out of the container so that the container does not expand excessively or burst. Therefore, a valve is provided on the lid or a hole is provided to release water vapor to the outside.

  Patent Document 1 discloses a packaging container in which fitting of a corner part is partially released by the pressure of water vapor generated inside the container when heated in a microwave oven, and water vapor is released to the outside.

  Patent Document 2 discloses a packaging container in which an exhaust hole is formed in at least one of a flange of a container body and a flange of a lid.

Patent Document 3 discloses a packaging container capable of forming a valve by providing a notch in the lid of the packaging container to release steam.

  Patent Document 4 discloses a packaging container in which an exhaust hole is provided in a lid by irradiating a laser beam.

JP 2001-97436 A JP 2007-276835 A Registered Utility Model Publication No. 3138601 JP 2017-81599 A

 As described above, it is desirable that a container in which food or the like is packaged be provided with a means for releasing steam.

  As such means, when the valve is provided on the lid by means such as a Thomson blade or an uneven blade, it is necessary to prevent the valve from dropping into the container body because the clearance is very small on the cut surface. This is because if the valve falls to the container body side, even if pressure is generated inside the container body due to heating, the cut surface may be caught and the valve may not open. If the valve does not open during heating, the lid may come off.

  Therefore, if the valve is lifted in advance to the side opposite to the container body, foreign matter such as insects may enter from the gap. Further, when the valve is lifted up, the valve may be damaged due to an impact during transportation or the like, and there is a risk that a damaged object may fall on the container body, that is, on the food.

  Accordingly, an object of the present invention is to provide a lid for a packaging container provided with a valve that can always maintain the action as a valve and can suppress the invasion of foreign matters such as insects as much as possible.

The configuration of the present invention that solves the above problems is as follows.

  (1) The device described in claim 1 is a lid that covers a packaging container body that is scheduled to be heated in a microwave oven in a state in which food is contained in the container body. A valve body was formed by providing a cut by irradiating a laser beam, and a connection portion that did not cut was provided in a part of the valve body.

  (2) The device according to claim 2 is configured by providing a plurality of connection portions in the lid of the packaging container according to claim 1.

  (3) The device according to claim 3 is configured such that the width of the cut is 0.3 to 0.5 mm in the lid of the packaging container according to claim 1 or 2.

  (4) The device according to claim 4 is configured such that the length of the connecting portion is 0.3 to 0.5 mm in the lid of the packaging container according to any one of claims 1 to 3.

  (5) The device according to claim 5 is a lid that covers a packaging container body that is planned to be heated in a microwave oven in a state in which food is contained inside the container body. The valve element was formed by providing a cut by half-cutting with a laser beam.

  (6) The device described in claim 6 is configured such that, in the lid of the packaging container according to claim 6, the uncut thickness by half-cut processing is 0.01 mm to 0.1 mm.

  (7) The device described in claim 7 is configured such that, in the lid of the packaging container according to claim 6 or 7, the width of the cut is 0.5 to 1.0 mm.

  It will be outlined with reference to the drawings how the present invention configured as described above works to solve the problems.

  FIG. 1 is an explanatory view of a valve body 12 in the device according to claim 1. The valve body 12 is provided with a notch 15 extending from the upper side to the lower side of the lid 10 shown in FIG. 8, and a connection portion 14 that does not make a cut is provided in a part of the valve body 12. In FIG. 8, U indicates the upper side and D indicates the lower side. Due to the presence of the connecting portion 14, the valve body 12 does not easily drop into the container body side.

  Further, since the valve body 12 is formed by providing a cut by laser beam irradiation, a clearance is generated. That is, even if the valve body 12 falls to the container body side, the valve body 12 is lifted by the internal pressure during heating, and vapor can be released from the container body 20.

  In addition, since the upper surface of the valve body 12 and the upper surface of the lid body 10 are the same surface, the possibility of damage to the valve body 12 due to an external factor such as an impact during transportation is reduced, and intrusion of foreign substances such as insects is reduced. It becomes possible to suppress as much as possible.

  On the other hand, when heating in the microwave oven, if the valve body 12 is pushed with a finger, the connecting portion 14 is disconnected, and the valve body 12 falls to the container body side, that is, vapor can escape from the container body. It becomes.

  FIG. 4 is an explanatory view of the valve element 13 in the device according to the second aspect. The valve body 13 is provided with notches 15 extending from the upper side to the lower side of the lid 10 shown in FIG. 8, and a plurality of connection portions 14 that are not cut are provided in a part of the valve body 13. Due to the presence of the connecting portion 14, the valve body 13 does not easily fall into the container body side.

  Moreover, since the valve body 13 is formed by providing a cut by laser beam irradiation, a clearance is generated. That is, even if the valve body 13 falls to the container body side, the valve body 13 is lifted by the internal pressure during heating, and vapor can be discharged from the container body 20.

  In addition, since the upper surface of the valve body 13 and the upper surface of the lid body 10 are the same surface, the possibility of damage to the valve body 13 due to external factors such as impact during transportation is reduced, and intrusion of foreign substances such as insects is reduced. It becomes possible to suppress as much as possible.

  On the other hand, when heating with a microwave oven, if the valve body 13 is pushed with a finger, the connecting portion 14 is disconnected, and the valve body 13 falls to the container body side, that is, vapor can escape from the container body. It becomes.

  FIG. 5 is an explanatory view of the valve body 32 in the device according to the fifth aspect. The valve body 32 is provided with a notch 34 in the lid 30 so as not to reach the lower side from the upper side of the lid 10 shown in FIG. 8 by laser beam half-cut processing. Thus, since the notch 34 does not penetrate to the lower side, the valve body 32 does not easily fall into the container body side.

  In other words, it is possible to provide a lid for a packaging container having a valve that does not generate a gap under a light load such as an impact during transportation. On the other hand, when heating in the microwave oven, if the valve body 32 is pushed with a finger, the notch 34 is cut off from being thin, and the valve body 32 falls to the container body side, that is, escapes steam from the container body. It becomes possible.

Explanatory drawing which shows the valve body of Claim 1 Explanatory drawing which shows the valve body of Claim 1 Explanatory drawing which shows the valve body of Claim 1 Explanatory drawing which shows the valve body of Claim 2 Explanatory drawing which shows the valve body of Claim 5 Explanatory drawing which shows the valve body of Claim 5 Explanatory drawing which shows the valve body of Claim 5 Schematic illustration showing the lid and container body Schematic illustration showing the lid and container body

  Hereinafter, preferred embodiments of the components of the present invention will be outlined with reference to the drawings. In addition, embodiment of the component of this invention is not limited to the following embodiment at all, As long as it belongs to the technical scope of this invention, various forms can be taken.

  A lid 10 for a packaging container according to the present invention is used by being fitted into an opening 21 of a container body 20 as shown in FIG. The container body 20 contains food and is cooked by microwave irradiation of a microwave oven with the lid 10 covered. In addition, as shown in FIG. 9, the lid 10 is sold as a shrink pack with the film 40 in a state in which the lid 10 is fitted to the container body 20, and is often heated in the range as it is.

  Although the lid 10 is illustrated to have a circular shape when viewed from above, the shape thereof is appropriate according to the opening of the container body 20, and may be a polygonal shape, an elliptical shape, or the like. is there.

  The lid 10 is formed of a synthetic resin sheet that can be mass-produced and manufactured inexpensively and easily. Specifically, thermoplastic resin sheets such as polyethylene, polypropylene, polystyrene, and polyethylene terephthalate (PET resin) can be used, and are molded by being in close contact with and heated by a vacuum, compressed air, or vacuum / pressure air. It is.

  The valve bodies 12, 13 and 32 according to the present invention are provided on the top plate portion 11 of the lid 10. Hereinafter, each valve body will be described in detail.

  The valve body 12 according to claim 1 is formed by providing a cut 15 in the top plate portion 11. As shown in FIG. 1, the notch 15 has both ends expanded in an arc shape (15a), extends linearly from the upper end of the portion expanding in the arc shape to the upper portion (15b), and an arc-shaped portion ( 15c) is formed. And between the circular arc shaped parts 15c and 15c, the connection part 14 in which the notch | incision is not provided exists in one place. Of course, such a shape is merely an example, and may be formed in an arc shape as shown in FIG. 2 or may be formed in a U shape as shown in FIG.

  According to the second aspect of the present invention, as shown in FIG. 4, a plurality of connection portions 14 not provided with cuts are provided. With such a structure, the valve body 13 can be more easily pushed into the container body 20 side when pushed with a finger. The number of connecting portions 14 may be set as appropriate depending on the sheet material to be used, the thickness, and the size of the valve.

  The invention described in claim 3 is the above, wherein in the lid of the packaging container according to claim 1 or 2, the width of the cut is formed to be 0.3 to 0.5 mm. If it exceeds 0.5 mm, insects and other foreign substances are likely to be mixed. If it is narrower than 0.3 mm, there is a risk of re-welding during laser processing, and the notch 15 and the surrounding portion are engaged and pushed in. This is because the valve is less likely to return.

  According to a fourth aspect of the present invention, in the lid of the packaging container according to any one of the first to third aspects, the length of the connecting portion is 0.3 to 0.5 mm. If it exceeds 0.5 mm, cracks may occur when the valve body is pushed in. If it is shorter than 0.3 mm, the valve body is pushed in during transportation or when packaging containers are stacked, resulting in a gap. This is because there is a risk of it.

  In the device according to claims 1 to 4, the cut 15 is formed by laser beam irradiation. The laser beam is not particularly limited as long as it can obtain a processing output, and various lasers such as a carbon dioxide laser, a YAG laser, a semiconductor laser, and an argon laser are used.

  As shown in FIG. 5, the valve body 32 according to claim 5 is formed by providing a cut 34 in the top plate portion 11. This cut 34 is due to a half-cut processing of the laser beam. You may irradiate the laser beam for a half cut process on either the surface side of the top-plate part 11, or a back surface side.

  As shown in FIG. 5, the notch 34 expands in a circular arc shape at both ends (34a), extends linearly from the upper end of the portion expanding in the circular arc shape (34b), and has an arc-shaped portion ( 34c) is formed. Of course, such a shape is an example, and it may be formed in an arc shape as shown in FIG. 6 or may be formed in a U-shape as shown in FIG.

  According to the sixth aspect of the present invention, the uncut thickness by half-cut processing is formed to 0.01 mm to 0.1 mm. If it exceeds 0.1 mm, it is difficult to separate even if the valve body 32 is pushed with a finger. If it is thinner than 0.01 mm, the valve body is pushed in during transport or when packaging containers are stacked, resulting in a gap. This is because there is a risk of it. Even if the cut 34 is partially penetrated by the half-cut process, since the lid body 10 is made of a synthetic resin sheet, such a penetration part is also brought into close contact with or joined by heat during laser processing. There is no leakage of contents from the site.

  According to the seventh aspect of the present invention, the width of the cut 34 is set to 0.5 to 1.0 mm. If the thickness exceeds 1.0 mm, it is not possible to provide a cut by one laser beam irradiation process, and the number of processes increases and the cost increases. On the other hand, when it is narrower than 0.5 mm, the notch 34 and the surrounding portion are engaged with each other, and it is difficult to push the valve body 32 with a finger.

  In the device according to any one of claims 5 to 7, the incision is formed by laser beam irradiation. The laser beam is not particularly limited as long as it can obtain a processing output, and various lasers such as a carbon dioxide laser, a YAG laser, a semiconductor laser, and an argon laser are used.

10 .. Lid 12 .. Valve body 13 .. Valve body 14 .. Connection 15 .. Cut 32 .. Valve body 34.

Claims (7)

  A lid that covers a packaging container body that is to be heated in a microwave oven while food is contained inside the container body, and a valve body is formed by providing a notch by laser beam irradiation on the top plate of the lid body In addition, a lid for a packaging container, wherein a connection portion that does not cut is provided in a part of the valve body.   The lid | cover of the packaging container of Claim 1 provided with two or more connection parts.   The lid of the packaging container according to claim 1 or 2, wherein the width of the cut is 0.3 to 0.5 mm.   The length of a connection part is 0.3-0.5 mm, The lid | cover of the packaging container in any one of Claims 1 thru | or 3.   A lid that covers a packaging container body that is planned to be heated in a microwave oven while food is contained inside the container body, and is cut by providing a cut in the top plate of the lid body by half-cut processing of a laser beam. The lid of the packaging container that formed the body.   The lid of the packaging container according to claim 6, wherein the uncut thickness by half-cut processing is 0.01 mm to 0.1 mm.   The lid of the packaging container according to claim 6 or 7, wherein the width of the cut is 0.5 to 1.0 mm.

Images