JP2002362598A - Lid for packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform not only fitting of a lid to a container main body while maintaining sufficient liquid-tightness but also opening of the container main body in a simple manner while utilizing a lug part even if a fitting portion is heat-sealed. SOLUTION: A packaging container consisting of a container main body 10 and a lid 20 with a lid flange 21 to be fitted to a flange of the container main body 10 is designed so that the lid 20 is released by utilizing a lug part formed unitarily with the lid flange 21 on the side of the lid 20. The packaging container is provided with a protrusion consisting of a rising wall 23a, which is formed at a portion adjacent to the lug part of a top cover part 24 constituting the lid 20 and of which both the ends are connectively provided to the lid flange 21, and a slanting surface 23b formed between an upper end of the rising wall 23a and a bottom of an inner wall 21a of the lid flange 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging container comprising a container body and a lid, also called an easy-open container, and more particularly to a lid which is opened from the container body by using a knob. Things.

[0002]

2. Description of the Related Art A packaging container comprising a container body and a lid fitted thereto is made of a synthetic resin sheet so that the container body and the lid can be disposable and inexpensive. For this reason, in recent years, it has been very useful as a container for lunch boxes and prepared dishes sold at convenience stores and the like, and various containers have already been proposed. In this type of packaging container, after the contents are packed in the container body, the lid is fitted using the flange, and conversely, the knob integrated with the lid is used. Since the lid is opened and the opening and closing as described above can be performed, this type of packaging container is
They are also called easy-open containers.

In order to open the lid of this kind of packaging container very easily, the fitting between the flanges must be loosened. The juice inside will leak out,
There is a problem that this sap stains others. In order to avoid this liquid leakage, the fitting between the flanges must be strengthened. In this case, even if the knob is used, it is difficult to open the lid.

[0004] In particular, in a packaging container for pickles, a sufficient amount of liquid juice is also stored, and in order to prevent this liquid juice from leaking out, a cover for the container body is required. The fitting portion is hermetically sealed by “heat sealing”. This "heat seal" part
It cannot be peeled off without applying great force to the lid, which is one of the reasons why it takes time to open it.

The inventor of the present invention has proposed a method for fitting the lid to the container body with sufficient liquid tightness, and for simplifying the opening of the lid. As a result of various studies, the present invention has been completed.

[0006]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned situation in a packaging container comprising a container body and a lid of this kind.
Not only can the lid be fitted to the container body with sufficient liquid tightness, but even if it is heat-sealed at the fitting part, it can be easily opened using the knob. It is an object of the present invention to provide a lid that can be used.

[0007]

Means for Solving the Problems In order to solve the above problems, first, means according to the first aspect of the present invention will be described with reference numerals used in the following description of embodiments. "The lid is composed of a container body 10 and a lid 20 having a lid flange 21 fitted to the main body flange 11, and the lid 22 is integrated with the lid flange 21 on the side of the lid 20 using the knob 22. In a packaging container in which the body 20 is opened, the top plate 2 forming the lid 20
4, a rising wall 23a formed at a portion adjacent to the knob 22 and having both ends connected to the lid flange 21;
The lid 20 of the packaging container 100 is provided with a projection 23 comprising an inclined surface 23b formed between the upper end of the lid 3a and the bottom of the inner wall 21a of the lid flange 21 ".

In other words, the lid 20 of the first aspect has a projection 23 formed in a portion close to the knob 22 and the presence of the projection 23 makes it possible to concentrate a force for opening. The release operation can be easily performed with a constant value. The opening operation of the lid 20 will be described as follows.

First, the user holds the bottom of the container body 10 with the palm of the left hand, for example, so that the knob 22 is at the lower left position or upper left as shown in FIG. Then, the bent index finger of the right hand is applied to the rising wall 23a constituting the projection 23 and the thumb is hung on the knob 22 or the knob 22 is gripped with the thumb and the index finger, and the remaining fingers are struck. It is attached or hung on the inner end side of the part 23. Next, in applying a force for opening the knob 22, the user touches the rising wall 23 a of the projection 23 with the index finger or the finger attached or hung on the inner end side of the projection 23. Twist your hands around.

That is, when the lid 20 is to be opened using the knob 22, the force of a human hand is applied to the rising wall 2 forming the projection 23 by the presence of the projection 23.
This is a force for rotating the knob 22 around the center 3a, so that only the portion of the lid flange 21 located around the projection 23 is opened and used in a concentrated manner.
For this reason, the lid flange 21 of the lid 20 is
Even if the main body flange 11 on the 0 side is heat-sealed, the portion of the lid 20 close to the knob 22 is easily and reliably opened.

When the lid flange 21 located around the projection 23 is opened as described above, the drainage may be performed using the opening or the contents may be taken out. When it is desired to open the entire lid 20, the portion centered on the knob 22 may be pulled up. Since the portion located around the protrusion 23 has already been opened, this portion can be easily opened, so that the fitting of the lid flange 21 or the opening of the heat sealing portion can be easily performed. The entire 20 can be easily opened.

After the lid 20 is fitted to the container body 10 containing foods and the like, the lid flange 2 is closed.
1 is to be heat-sealed to the main body flange 11 as described above.
Since the inclined surface 23b constituting the projection 23 enters the container body 10, it is possible to prevent the air of the volume defined by the projection 23 from entering.
In other words, the lid 20 reduces the amount of air remaining in the container body 10 that may be contaminated with various bacteria due to the presence of the projection 23 when heat-sealed.

Therefore, according to the lid 20 of the first aspect, the force applied to the knob 22 can be concentrated only around the protrusion 23 due to the presence of the protrusion 23. As a result, Not only can it be easily opened, but also the heat sealing of the container body 10 can be made stronger.

[0014] In order to solve the above-mentioned problem, a means adopted by the invention according to claim 2 relates to a method according to claim 1, wherein the cover 20 of the above-mentioned claim 1 is described as "from the knob portion 22 of the inclined surface 23b to the center of the rising wall 23a. Is shorter than the distance L1 from the knob 22 to the end of the rising wall 23a ”.

That is, in the lid 20 of the second aspect,
When a force is applied to the knob 22, the force is fitted to the main body flange 11 on the container body 10 side in the vicinity of the knob 22, and in some cases, a wide portion of the lid flange 21 that is heat-sealed. (From the knob 22 to the distance L1). Therefore, in the lid 20 according to the second aspect, the distance L2 from the knob 22 to the center of the rising wall 23a of the inclined surface 23b. Is shorter than the distance L1 from the knob 22 to the end of the rising wall 23a.

In other words, when the finger is put on or put on the rising wall 23a of the protruding portion 23 to cause the knob portion 22,
The lid flange 21 in the portion close to the knob portion 22 comes off from the main body flange 11 on the container main body 10 side, and finally, the lid flange 21 tends to break at any part thereof. The location is a portion adjacent to both ends of the rising wall 23a. The distance L1 from the knob 22 to the end of the rising wall 23a is longer than the distance L2 from the center of the knob 22 to the center of the rising wall 23a. Thus, the lid flange 21 is opened at least to a portion wider than the distance L2.

Therefore, the lid 20 of the second aspect can open the lid flange 21 to a portion close to the end of the rising wall 23a, and is similar to the lid 20 of the first aspect. Of course, the effect can be exerted, and the user's finger is
A wide portion can be opened even when the device is placed on the top plate 24 or the top plate portion 24.

In order to solve the above-mentioned problem, a means adopted by the invention according to claim 3 is a cover according to claim 1 or 2.
0, "the inclined surface 23b forming the projection 23"
Of the main body flange 11
And an undercut portion 23c engaged with the bottom of the inner wall 11b. "

That is, the lid 20 according to claim 3
This is to ensure that the fitting can be surely performed when only the vicinity of the knob 22 is opened and the content is taken out and resealed, as well as when the fitting is fitted to the container body 10. However, the opening or opening operation of the lid 20 can be easily performed.

In particular, the container body 10 after storing foods and the like
When the lid 20 is fitted to the heat seal, the undercut portion 23c is attached to the inner wall 1 of the main body flange 11.
By engaging with the bottom of 1b, the integration of the container main body 10 and the lid 20 can be ensured, and the heat sealing operation which is usually performed mechanically can be performed in a stable state.

Therefore, the lid 20 according to the third aspect exhibits the same function as that of the lid 20 according to the first or second aspect, and can surely be fitted to the container body 10 again. .

Further, a means adopted by the invention according to claim 4 is that the rising wall 23a is curved toward the knob 22 with respect to the lid body 20 according to claim 3 above.

In the lid 20 thus configured, as shown in FIG. 1, the top plate 24 other than the projection 23 can be made wider and wider, and the type and weight of the contents are displayed. The label can be attached with sufficient margin. Of course, since the top plate 24 other than the projection 23 is widened, the contents can be easily and reliably viewed from the outside, and stabilization when the lids 20 are stacked in multiple stages can be achieved. It is.

According to a fifth aspect of the present invention, there is provided the lid 20 according to any one of the first to fourth aspects,
"Rising wall 23 of outer wall 21b constituting lid flange 21"
a cuts 21c were made in the portions facing the respective ends of "a".

That is, in the lid 20 according to any one of the first to fourth aspects, when the opening using the knob 22 is performed, a portion facing each end of the rising wall 23a of the lid flange 21 is formed. The notch 21c is positively formed in the outer wall 21b located at that part, and the outer wall 21b is rather cut off at the notch 21c so that the knob 22 of the lid 20 is cut. This makes it possible to easily open the portion having the same. In this case, if the notch 21c is inserted near the knob 22 side,
Breakage at the cut 21c when the knob 22 is pulled up can be effectively generated.

In other words, the fact that the lid 20 is easily broken at each notch 21c means that the lid flange 21 can be easily opened from the knob 22 to that. The lid 2 can be easily opened from the container body 10 even if it is heat-sealed.
It is 0.

[0027]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a packaging container according to an embodiment of the present invention; FIG.
0 substantially includes each of the above-described inventions, and therefore, the description will be made mainly on the packaging container 100 below.

FIG. 1 is a plan view of a packaging container 100 including a lid 20 according to the present invention.
Reference numeral 0 denotes a container main body 10 and a lid body 20 fitted by fitting a lid flange 21 to the main body flange 11 as shown in FIG. The container 100 and the lid 20 are each integrally formed using a synthetic resin sheet as a material.

As shown in FIGS. 2, 4 and 5, the container main body 10 has a main body flange 11 on its outer periphery. Inner wall 11a and outer wall 11 that are substantially orthogonal to each other
b and a flat portion connecting these upper ends to form a substantially U-shaped cross section. Then, the lid flange 21 on the lid 20 side is fitted to the flat portion, and in some cases, the flat portion of the lid flange 21 is heat-sealed.

It should be noted that the undercut portion 23c of the lid 20 is engaged with the inner wall 11a of the main body flange 11 outside a portion facing a knob portion 22 described later. The undercut portion 23c
It is an undercut part corresponding to.

As shown in FIGS. 1 and 6, the lid 20 has a substantially rectangular shape which can be fitted into the substantially rectangular container main body 10. As long as L1 can be formed, it may be implemented as another shape such as a circle or a fan. Needless to say, when the packaging container 100 has another shape, the packaging container 100 side also has that shape.

As shown in FIGS. 1 to 5, the lid 20 has a lid flange 21 to be fitted (outside-fitted) to the main body flange 11 on the container main body 10 side. The lid flange 21 includes an inner wall 21a and an outer wall 21b, as shown in FIG.
Each of these upper ends is connected by a flat portion. In other words, the lid flange 21 has a substantially U-shaped cross section.

As shown in FIG. 1, a knob 22 is integrally formed at one corner of the lid 20.
Almost the entire inside of the lid flange 21 is a top plate portion 24. Then, a projection 23 which constitutes a main part of the present invention is provided on a portion of the top plate portion 24 close to the knob 22.
Is formed.

As shown in FIGS. 3 to 5, the protrusion 23
The rising wall 23a has a lower end connected to the top plate 24, and an inclined surface 23b connected to the upper end of the rising wall 23a and connected to the lower end of the inner wall 21a constituting the lid flange 21. is there. In this case, the inclined surface 23b and the inner wall 2
A flat surface may be formed between the lower end of the rising wall 1a and the upper end of the rising wall 23a.

The protruding portion 23 also serves as a bent portion formed by the knob portion 22. To make the bending good, the upper end of the protruding portion 23, that is, the upper end of the rising wall 23a is connected to the lid flange 21. It is good to make it the same height as. When the upper end of the projection 23 is lower than the lid flange 21 by about 0.5 mm, the heat plate for heat sealing does not come into contact with the lid 20 side. Can be.

As shown in FIGS. 1 and 6, the rising wall 23a of this embodiment is formed in an inverted arc shape having one knob 22 as a center (projecting toward the knob 22). And each end thereof is a distance L from the center of the knob 22.
It is located where it extends by one.

The distance L1 is larger than the distance L2 from the approximate center of the rising wall 23a to the knob 22 so that the approximate center of the rising wall 23a is closer to the knob 22. Thus, a large space in the shape of the top plate portion 24 for attaching the label can be obtained. In other words, the label on which the stored articles, the weight, and the like are displayed is often formed in a rectangular shape, and the approximate center of the rising wall 23a is brought closer to the knob 22 so that the position of the corner of the label can be adjusted. As a result, the space for attaching the label can be increased.

Further, the inside of the rising wall 23a (the cover 20)
Of the rising wall 2 by forming a deformed portion such as a ridge or a step on the side that is the center of the
3a can be increased in strength. Further, a concave portion or a convex portion for preventing blocking may be formed in a deformed portion such as a ridge or a step formed inside the rising wall 23a.

The inclined surface 23b constituting the projection 23 is
The planar shape is a mountain shape as shown in FIG. 1, and a portion corresponding to the top of the mountain is an undercut portion 23c as shown in FIG. 3 and the like. Of course, the ridge line of the mountain-shaped inclined surface 23b is continuous with the lower end of the inner wall 21a of the lid flange 21, and the lower end of the inner wall 21a is closer to both ends of the rising wall 23a. It will be close to the upper end. This is because one synthetic resin sheet is molded.

The shape of the knob 22 may be symmetrical as shown in FIG. 1 or may be symmetrical so that a finger can be easily engaged. Is also good. Further, it is better to use a transparent or translucent synthetic resin sheet for forming the lid 20 so that the contents in the container body 10 can be seen from the outside. Furthermore, in order to facilitate stacking the packaging containers 100 packed with foods and the like in multiple stages, the inclined surfaces 23b forming the projections 23 of the lid 20.
It is preferable to form a projection to be placed on the bottom of the container body 10 in advance.

[0041]

As described in detail above, first, the lid 20 according to the claims is composed of the container main body 10 and the main body flange 11.
And a cover 20 having a cover flange 21 fitted into the cover 20. The cover 20 is opened using a knob 22 integrated with the cover flange 21 on the cover body 20 side. In the container, the top plate 2 forming the lid 20
4, a rising wall 23a formed at a portion close to the knob 22 and having both ends connected to the lid flange 21;
3a and an inclined surface 23b formed between the upper end of the lid flange 21 and the bottom of the inner wall 21a of the lid flange 21. "
2, the opening operation of the lid 20 can be easily performed, for example, only by twisting the right hand. Even if the lid flange 21 is heat-sealed to the main body flange 11, the operation is reliably performed. You can do it. In other words, the lid 20 of this claim 1 is
The liquid-tightness can be enhanced by strengthening the heat seal between the main body flange 11 and the main body flange 11, and the opening or closing operation can be easily performed by the presence of the projection 23.

The lid 20 according to the second aspect is the same as the lid 20 according to the first aspect, except that the knob portion 2 of the inclined surface 23b is provided.
The distance L2 from the center 2 to the center of the rising wall 23a is determined by the knob 2
Since it is shorter than the distance L1 from 2 to the end of the rising wall 23a, in addition to exhibiting the same effect as the lid 20 of claim 1, a portion of the lid 20 close to the knob 22 is provided. Can be opened or closed with a sufficient width. The lid 20 according to claim 3 is different from the lid 20 according to claim 1 or 2 in that the inclined surface 23 that forms the projection 23.
b, the end portion facing the knob 22 is attached to the main body flange 1.
Undercut portion 23c engaged with the bottom of inner wall 11b
This has the feature that, in addition to exhibiting the same effect as the lid 20 of claim 1 or 2, the fitting of the lid 20 to the container body 10 and the re-sealing are ensured. You can do it.

Further, the lid 20 according to the fourth aspect is the same as the lid 20 according to any one of the first to third aspects described above,
3a is curved toward the knob portion 22 side, whereby the same effects as those of the lid body 20 according to the above-described claims 1 to 3 can be exerted. And the cover 20 according to claim 5 can be sufficiently secured.
Is the lid 20 according to any one of claims 1 to 4,
The rising wall 23a of the outer wall 21b constituting the lid flange 21
Is characterized in that notches 21c are formed in portions facing the respective ends, and the bent position of the outer wall 21b of the lid flange 21 can be secured by the notches 21c, so that opening of a sufficient size can be performed. You can.

[Brief description of the drawings]

FIG. 1 is a plan view of a packaging container having a lid according to the present invention.

FIG. 2 is a front view of the packaging container in which a right half of a lid is omitted.

FIG. 3 is a partially enlarged longitudinal sectional view of the lid taken along line 1-1 in FIG. 1;

FIG. 4 is a partially enlarged longitudinal sectional view showing a lid shown in FIG. 3 and a container main body into which the lid is fitted.

5 is a partially enlarged cross-sectional view when the lid shown in FIG. 4 is opened or closed from the container body.

FIG. 6 is a bottom view of the lid according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Packaging container 10 Container body 11 Main body flange 11a Inner wall 11b Outer wall 20 Lid 21 Lid flange 21a Inner wall 21b Outer wall 21c Notch 22 Knob 23 Protrusion 23a Rising wall 23b Inclined surface 23c Undercut portion 24 Top plate length L1 Distance distance

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E067 AA11 AB01 AB08 BA07A BB14A EA06 EA14 EA18 EB11 EB27 FA01 FC01 3E084 AA06 AA12 AA14 AA15 AA24 AB10 BA01 CA01 CA03 CA10 CB03 CB04 CC03 FA09 GA08 GB12 GB17

Claims (5)

[Claims] 1. A lid comprising a container main body and a lid having a lid flange fitted to the main body flange. The lid is opened using a knob integrated with the lid flange on the lid side. In a packaging container to be performed, an erecting wall formed at a portion of the top plate constituting the lid close to the knob, and having both ends connected to the lid flange; A lid for a packaging container, comprising a projection comprising an inclined surface formed between an upper end of a wall and a bottom of an inner wall of the lid flange. 2. A distance between the knob and the center of the rising wall of the inclined surface is shorter than a distance between the knob and an end of the rising wall. 4. The lid according to 1. 3. An undercut portion of the inclined surface forming the projection, the end portion of the inclined surface facing the knob portion being engaged with a bottom portion of an inner wall of the main body flange. Or the lid according to claim 2. 4. The lid according to claim 1, wherein the rising wall is curved toward the knob. 5. The lid according to claim 1, wherein a cut is made in a portion of the outer wall forming the lid flange, which faces each end of the rising wall. body.