JPH01254563A - Container sealing lid - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a sealing lid for a container, and more particularly to a sealing lid made of synthetic resin. The container to which this lid is applied is, for example, a container for storing powders and granules such as sugar, flour, salt, seasonings, and detergents.

(Prior art) For example, as proposed in Utility Model Application No. 1983-200813,
A composite container in which a paper body and a synthetic resin part are integrally attached is used with a lid attached to the upper opening. In order to prevent these lids from being opened by mischief, methods such as attaching a tack label to the lid or covering the lid with shrink film are used.

(Problems to be Solved by the Invention) However, all of these methods increase the number of processing steps, causing an increase in costs.

Therefore, the present invention has an excellent tamper-proofing function because if an attempt is made to open the lid on a container by tampering, the lid becomes irreversible, and moreover, the container normally has a good sealing property, and the sealing property is maintained even after opening. The purpose is to provide a lid for sealing a container.

(Means for Solving the Problems) According to the present invention, in a sealing lid applied to a container in which a protruding ridge is formed along the outer surface of the periphery of the upper opening of the container, the sealing lid is tightly attached to the top of the periphery of the upper opening of the container. A peripheral top that comes into contact with the peripheral top, a peripheral descending wall that is integral with the peripheral top and descends along the inner surface of the periphery of the upper opening of the container, and a peripheral descending wall that is integral with the peripheral top and projects downward along the outer surface of the periphery of the upper opening of the container. a peripheral skirt portion, and an inner surface of the peripheral skirt portion is configured such that the peripheral edge entry portion is in close contact with the lower surface of the ridge of the container while being in close contact with the top of the peripheral edge of the upper opening of the container. An inwardly projecting edge is formed, and a thinned portion is formed in the circumferential direction at a position above the inwardly projecting edge.

(Function) In the above configuration, the inwardly protruding edge of the peripheral skirt portion is pressed against the lower side of the ridge of the container to prevent the lid from escaping. To remove the lid, manually pull on a portion of the peripheral skirt; the peripheral skirt will tear away from the rest of the lid along the thin wall, and the inwardly projecting edge will be removed from the container ridge, allowing the lid to be removed. Can be easily removed from the container. The lid, whose peripheral casut has been torn off and removed, is used as it is by covering the container.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of a composite container provided with a lid according to the present invention,
In the figure, R indicates a composite container, and C indicates a lid of the present invention applied thereto. This composite container R can be used to store household laundry powder detergent, for example, but
Of course, it can also be used to store other things.

The main body of the composite container R is composed of a blank plate 2 shown in FIG. The blank plate 2 is initially in the form of a flat plate, and this flat plate is separated by its both side edges 2a.

2b are wound or bent so as to face each other to form a cylindrical shape, thereby forming the body of the composite container. In the illustrated example, the body has a substantially rectangular cylindrical shape, but it may have a rectangular cylindrical shape, a cylinder, an elongated cylinder, etc. other than the rectangular cylinder.

As shown in FIG. 3, a blank plate 2 is bent into the shape of the body of a composite container using a guide mold (not shown) or the like.
The synthetic resin parts 5a, 5b, 5c are integrally attached so as to fill the gap 3 between the side edges 2a, 2b and the bottom 4 opening downward, and cover the peripheral edge of the blank board upper opening 2C. molded. In this way, the synthetic resin part 5a
, 5b.

The state of the composite container R in which 5C is integrally molded is as shown in FIG.

To make the composite container R in the state shown in FIG. 1, the blank plate 2 formed in the state shown in FIG. 3 is set in the cavity of a molding die (not shown). The shape of the cavity is the same as that of the composite container shown in FIG. After setting the blank plate 2 in the cavity, a synthetic resin is injected into the cavity, and the injected synthetic resin fills the parts 5a, 5b, 5c.
The injection molding is completed by integrally adhering to the blank plate 2 so as to form a .

The relationship between the blank plate 2 and the synthetic resin parts 5a, 5b, and 5c in the composite container R thus formed is as shown in FIGS. 4 to 9.

First, as shown in FIG. 4, FIG. 5, FIG. 7, and FIG. It is integrally attached to. Although there is no gap corresponding to gap 3 in the central part of the side wall of the blank plate facing the synthetic resin portion 5a (the part that fills gap 3) shown in FIG. A synthetic resin portion 5d having approximately the same width as the resin portion 5a is attached by injection in the vertical direction in the form of a belt. On the inside of the synthetic resin parts 5a and 5d, there is a rib 6a for reinforcing and stacking in the vertical direction.

6d is integrally formed during injection.

The outer peripheral surface of the blank plate 2 is a synthetic resin portion 5a.

Even after molding by injection of 5b, 5c, and 5d, the exposed state is maintained as shown in the figure. Note that, if necessary, the outer peripheral surface of the blank board may be partially covered with a synthetic resin portion, or an appropriate coating may be applied to the outer peripheral surface of the blank board.

As shown in FIG. 4 and FIG. 6, which is a right side view thereof,
A protrusion 8 is provided on the outer surface of the container short side side surface of the synthetic resin portion 5C.
a and 8d are integrally formed by injection molding. These protrusions 8a, 8d have enlarged heads at their tips, as shown in FIG. These protrusions 8a and 8d are for engaging holes 10 at both ends of a flexible resin band-shaped handle 9 shown in FIG. 2, and the handle 9 is rotatable as shown in FIG. It is used as a handle when carrying the composite container R by hand. In order to facilitate formation of the protrusions 8a and 8d, the synthetic resin portions 5a and 5d are formed wide at the protrusion portions.
Therefore, in the portion corresponding to the protrusion 8a, the gap 3 is 3a
It is enlarged as shown in (Fig. 3). In addition, in the illustrated example, the synthetic resin portion 5a is
, 5d has an outer surface that protrudes as shown at 11 in FIGS. 1 and 5, and an inner surface that is recessed correspondingly as shown at 12 in the same figures.

As shown in FIGS. 7 and 8, an upper synthetic resin portion 5c is formed so as to reach above the upper opening edge 2c of the blank plate 2. As shown in FIGS. This synthetic resin portion 5c constitutes the upper opening rim 14 of the composite container R. Synthetic resin part 5
A protruding ridge 15 is integrally formed on the outer surface of C over almost the entire circumference. This ridge 15 constitutes a part of the means for airtight engagement with the Mc. The details will be described later.

As shown in FIG. 10, which shows a cross section of the synthetic resin portion 5a, the blank board 2 can be constructed of a laminated sheet of a main body 2' made of paper, for example, and a synthetic resin layer 17 coated on its inner surface. The synthetic resin layer 17 is, for example, a polyethylene resin layer.

Furthermore, the synthetic resin portion 5a is made of the same polyethylene resin as the synthetic resin layer 17. As a result, the synthetic resin portion 5a is transferred to the blank plate 2 through the synthetic resin layer 17 during injection molding.
It adheres well to. The same applies to the synthetic resin portions 5b, 5c, and 5d.

As is clear from FIG. 10, the outer surface of the synthetic resin portion 5a is preferably flush with the outer surface of the blank board 2.

The blank board 2 can be constructed from a laminated sheet other than those described above. An example of the laminated layer is polyethylene (1
5μ) 7 paper (300t/g)/polyethylene (15μ)
/ polystyrene (40μ).

As shown in FIGS. 1 and 3, a score line 19 is formed in the bent or curved portion of the blank plate 2 of the composite container R in the direction of its ridgeline. The cut line 19 may be a ruled line 19a as shown in FIG. 11, a half cut 19b as shown in FIG. 12, or a V-cut groove 19 on the inner surface.
It may be c.

Note that in the case of the ruled line 19a, a corresponding protrusion is formed on the inside.

By forming the score lines 19 in this way, the blank board 2 can be bent or curved easily and accurately,
The blank plate 2 can be bent and correctly set at a regular position in a molding die without causing wrinkles, distortions, etc.

In addition, when the score line 19 is formed in this way, in order to prevent the resin from wrapping around the score line 19 during injection molding of the synthetic resin, it is necessary to make sure that the resin escapes or does not reach the joint between the synthetic resin and the blank plate. A score line 19 is formed. An example thereof is shown in FIG.

The reinforcing and stacking ribs 6a and 6b increase the buckling strength of the composite container including the blank plate, improve the drop strength of the bottom resin portion 5b, and facilitate stacking of the containers.

The projections 8a and sb are preferable because they allow the belt-shaped handle 9 to be easily attached as described above. Conventionally, the method of attaching a handle to a paper box was to attach both ends of the handle made of paper tape with adhesive, but recently a method of attaching the handle of plastic tape with rivets has also been used. However, this method also requires a complicated manufacturing process and is expensive.
There are also problems with the design. On the other hand, the protrusion 8a.

Integral injection molding of 8b is simple, highly productive, excellent in design, and inexpensive.

Note that the blank board 2 can also be made of a laminated material as described below. The following order is from front side to back side.

1. Biaxially oriented polypropylene film (20μ) 2. Polyethylene (15μ) 3. Printing layer 4. Paperboard (450s-/rn") 5. Polyethylene (20μ) 6. Unstretched polypropylene film (40μ) Also, synthetic resin part It is better to use polypropylene.

Next, details of the lid C of the present invention will be explained.

As shown in FIGS. 1 and 15, the lid C is
and a peripheral edge portion 22.

The detailed configuration of the peripheral portion 22 is as shown in FIGS. 16 and 17. As shown in FIG. 16, the peripheral portion 22 is
A peripheral descending wall 24 that is integral with the peripheral edge portion 23 and descends along the inner surface of the synthetic resin portion 5C around the upper opening of the container R, and a synthetic resin portion that is integral with the peripheral top portion 23 and is integral with the upper opening peripheral edge of the container. 5c, and a peripheral skirt portion 25 that protrudes downward along the outer surface of 5c.

The peripheral top portion 23 is configured to closely contact the top of the upper opening peripheral edge 14 of the container R. The peripheral descending wall 24 is integrally connected to the peripheral edge of the top plate 21 and is integrally provided with a sealing protruding rib 26 on the side facing the synthetic resin portion 5C of the container. On the other hand, an inward protruding edge 27 is formed on the inner surface of the peripheral skirt portion 25, and a groove 2 is formed above the protruding edge 27.
8 is formed. In the state shown in FIG. 16 in which the MC is fitted into the container R, the peripheral edge entry portion 23 is connected to the upper opening peripheral edge 1 of the container.
4, the protruding rib 26 is in close contact with the inner wall of the synthetic resin portion 5C, and the inward protruding edge 27 is tightly pressed against the lower surface of the ridge 15 of the container. Further, the protruding ridge 15 enters inside the groove 28 . In this way,
The internal space of the container R is completely sealed from the outside by sealing at three locations: the peripheral top portion 23, the protruding ribs 26, and the protruding edges 27.

Ribs 30 can be formed on the entire circumference of the large peripheral portion 23 in an upward direction. Further, as shown in FIGS. 1, 15, and 17, a vertical rib 31 may be formed at a portion of the corner of the peripheral edge portion 22.

As shown in FIG. 16, a thin wall portion 33 is provided above the inwardly projecting edge 27, and this portion is particularly susceptible to destruction. In this embodiment, the thin wall portion is provided at the groove 28 portion.

In the illustrated embodiment, the peripheral skirt portion 25 is notched at 35 in the center of the short side of the edge C, as shown in FIG. The notch 35 is formed only in a portion below the thin wall portion 33, and a tear tab 36 is provided protruding from one side of the notch 35. Further, a knob 37 is integrally provided on the upper part of the notch 35 and protrudes.

To apply the lid C to the container R, since both are made of elastic hard synthetic resin, press the lid C down against the container R so that it is in the state shown in Figure 16, and then press the lid elastically against the container. Fit together. As a result, the inwardly projecting edge 27 of the lid engages with the lower side of the ridge 15 of the container, and the lid will not come off the container.

Further, since the peripheral top plate portion 23 and the ribs 26 are pressed against the container, the container and the lid come into contact with each other in a sealed state.

Such a sealed state is maintained during normal handling because the inwardly protruding edge 27 has sufficient strength.

However, if you try to remove the lid C by force, the thin part 33
Since the lid breaks first, it is immediately obvious that the lid has been tampered with.

When opening the lid C, grasp the tear tab 36 with your hand and pull it outward. As a result, the peripheral skirt portion 25 on the lower side of the thin wall portion 33 forms a band-like shape and is separated from the other portions of the lid C. When the portion with the inwardly projecting edge 27 is removed in this way, the lid no longer has any means of restraining the container and can be removed. The removed lid can be applied to the container R after the contents of the container R have been removed.

Thereafter, the remaining portions of the large peripheral portion 23, descending peripheral wall 24, and peripheral skirt portion 25 contact the synthetic resin portion 5C around the opening of the container R to maintain a sealed state. In addition, knob 3
7 is used when opening the lid C thereafter.

The notch 35 can be provided at a location other than shown, but must be provided avoiding a part of the corner. The corner portion of the lid is important in maintaining an accurate fit to the container, and it is undesirable for the notch 35 to be near the corner portion, as this reduces its rigidity and makes it more susceptible to deformation.

The vertical rib 31 serves to reinforce a part of the corner of the lid C, and also serves as a first
It also serves to receive the lower end of the peripheral skirt portion 25 of the lid immediately above, as shown in FIG.

Moreover, the upward rib 30 on the peripheral edge is the first
As shown in FIG. 7, it contacts the inside of the peripheral skirt portion 25 of the upper lid to stabilize the cooking.

FIG. 18 shows a modified example of MC. In this example, the lower end of the peripheral descending wall 24 is not connected to the top plate part 21, and the peripheral top part 24 is not connected to the top plate part 21.
A top plate portion 21 is directly connected to the top plate 3. In addition, thin section 3
3' is formed in the large peripheral portion 23. Therefore, when the package is opened, the peripheral skirt portion 25 is completely removed.

In a modified example of the lid C shown in FIG. 19, a thin wall portion 33' is provided immediately above the inwardly projecting edge 27, and the upwardly directed scooking rib 30 is omitted.

As described above, the lid C has excellent sealing properties, is easy to open, and maintains excellent sealing properties even after opening.

[Effect of idea]

The sealing lid according to the present invention does not easily fit into the container if it is forcibly removed from the container, so it has a tamper-proof effect, and when opening the lid, if you pinch the peripheral skirt part with your hand and pull it apart, the lid will open below the thin wall part. The peripheral skirt is torn at some points and the lid can be easily removed. On the other hand, the lid after opening continues to maintain a good seal when it is reapplied to the container.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the composite container together with the lid of the present invention;
The figure is a perspective view of the handle, Figure 3 is a perspective view showing a blank plate,
Figure 4 is a partially sectional front view of the composite container, Figure 5 is an enlarged view of the left half of Figure 4, Figure 6 is a right side view of Figure 4, and Figure 7 is a longitudinal section of Figure 4. A sectional view seen from the left side, Figure 8 is an enlarged view of a part of Figure 7, Figure 9 is an enlarged view of part ■ in Figure 7, Figure 10
The figure is a sectional view taken along the line X-X of Fig. 7, Fig. 11 is a cross-sectional view of the bent portion of the blank plate, Fig. 12 is a view showing a modification of Fig. 11, and Fig. 13 is a modification of Fig. 11. Illustration showing an example, No. 14
15 is a plan view of the lid of the present invention, FIG. 16 is a sectional view taken along line XV [-XVI in FIG. 15, and FIG. 17 is a cross-sectional view taken along line X 18 and 19 are cross-sectional views showing modifications of FIG. 16. R...Composite container, C...Lid, 2...Blank board,
2C...Blank plate upper opening, 3...Gap, 4...
・Bottom, 5a, 5b, 5c,
5 d - Synthetic resin portion, 6a, 6b... Ribs for cooking before reinforcement, 8a, 8b... Protrusions, 9... Belt-shaped handle, 14... Upper opening rim of composite container, 15... Protrusions Edge, 19... Cut line, 19a... Ruled line, 19b.
...half cut, 19c...V cut groove, 21...top plate part, 22...periphery part, 23...periphery top part, 24...
- Peripheral descending wall, 25... Peripheral skirt portion, 27...
Inward protruding edge, 28... Concave groove, 30... Rib, 31
...Vertical rib, 33.33', 3B'...Thin wall portion, 36...Tear tab. Applicant's agent Yu Sato Figure 1 Figure 3 b Figure 4 Figure 2 Figure t' and Figure 15

Claims (1)

[Claims] A sealing lid applied to a container in which a ridge is formed along the outer surface of the periphery of the upper opening, and the lid includes a rim top that closely contacts the top of the rim of the upper opening of the container; A peripheral descending wall that is integral with the container and descends along the inner surface of the periphery of the upper opening of the container, and a peripheral skirt portion that is integral with the peripheral top and projects downward along the outer surface of the periphery of the upper opening of the container, the peripheral skirt portion An inwardly projecting edge is formed on the inner surface of the container so that the peripheral top portion is in close contact with the top of the upper opening periphery of the container and is in close contact with the lower surface of the projecting ridge of the container. A sealing lid characterized in that a thin wall portion is formed in a circumferential direction at a position above the protruding edge.