JPH02258565A - Tabbed lid for sealing container - Google Patents

Abstract

PURPOSE:To reduce material cost, permit an easy handling in a die upon molding and an easy unpacking, eliminate the possibility of damage to container and make the container easily disposable by injection molding a lid material with a synthetic resin layer formed on its paper board substrate integrally with an annular lip through a hole made in the lid material on its synthetic resin side and with a tab piece on its paper board side using the synthetic resins. CONSTITUTION:A lid (A) for sealing a container is made by injection molding a lid material (a) formed by laminating or coating a paper board substrate 1 with a synthetic resin layer 2 integrally with an annular lip (b) engageable into the inside of an opening part of a container B on the side of the synthetic resin layer 2 and with a tab piece (c) through a hole 3 made in the lid material (a) on the side of the paper board 1 using the same resins as the layer 2. A thin part 4 is formed for unpacking inside the annular lip (b) in a position coincident with a perforation 5 for unpacking provided on the paper board 1 of the lid material (a).

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a lid for a sealed container with a tab that fits tightly into the inside of the opening of the container body of the sealed container.

(Prior art) Conventionally, this type of device uses a cover plate mainly made of metal foil, and a frame is injection molded on the outer periphery of the cover plate using synthetic resin. There is a lid with a knob that is integrally formed with a knob on the front surface through a protrusion and a through hole that follows the opening shape of the back surface (Japanese Utility Model Publication No. 51821/1982).

(Problem to be solved by the invention) In the above-mentioned lid with a tab, the main material of the lid plate is metal foil, so if it is too thin, it will be difficult to handle it when placed in the mold. , a certain degree of thickness is required, which increases the material cost, or it is necessary to form a ring-shaped corrugated shape for reinforcement, which takes time and effort to form, and the lid plate is mainly made of metal foil. However, there was a drawback that there was a risk of damage due to contact with other objects.

The present invention was created as a result of various studies in view of these points, and it aims to reduce material costs by using paperboard as the base material of the lid material, and also facilitates handling in the mold during molding. It is easy to open as a lid,
The purpose is to obtain something that has less risk of damage and is easier to dispose of.

(Means for Solving the Problems) In order to achieve the above object, the present invention uses a paperboard as a base material, and uses a paper board as a base material, and a lid material that is laminated or coated with a synthetic resin to form a synthetic resin layer. On the other hand, an annular protrusion that fits into the opening of the container body is integrally injection-molded on the synthetic resin side and a knob piece on the paper board side with synthetic resin through the through hole drilled in it. A thin section for cutting is formed on the inside, and this thin section is
It corresponds to the opening separation part on the paper board side, and is connected to the knob piece at the connecting part through the above-mentioned through hole.As a specific structure, the opening separation part on the paper board side is connected to the perforation line, or a half-cut line, the position of which is in line with the thin-walled part for cutting on the side of the synthetic resin layer, or a position slightly outside, and an annular protrusion having a knob and a thin-walled part for cutting. The connecting portion with the lid is located at an outwardly protruding portion of the thin-walled portion, and in particular, the protruding portion is located at the top of a mountain-shaped transparent window that widens at the end and is drilled in the lid material. .

(Example) Embodiments of the present invention will be described below with reference to the drawings.

The lid for a sealed container with a knob (A,) of the present invention has a paper board (1
) is used as a base material, and a synthetic resin layer (2) is formed thereon by laminating or coating. The matching annular protrusion (b) is also attached to the paper board (1).
Synthetic resin is integrally injection-molded through a hole (3) made in the lid (a) with a knob (C) on the side, and this injection molded resin covers the synthetic resin layer (2) of the lid (a). ) is the same as For example, thermoplastic resins such as polyethylene and polypropylene are used.

On the inside of this annular protrusion (b), there is a thin part (
4) is formed.

As shown in FIGS. 5 and 6, this thin part (4) is a perforation line or a half-slit line (hereinafter referred to as perforation line (5)) for opening the paper board (1) of the lid (a). This is the position that matches.

The position of the through hole (3) that connects the annular protrusion (b) on the synthetic resin layer (2) side of the lid material (a) and the knob (C) on the paper board (1) side is located in the thin part of the plane paper. (4) is the part (p) that protrudes outward.

・During injection molding, the knob piece (C) is on the paper board (1) side of the lid (a), so it is not integrated, but the paper board (1) side is also laminated with synthetic resin. Alternatively, in the case of coating, a release paper or the like may be interposed to prevent welding.

Also, on the inside of the perforation line (5), the knob piece (C)
At a position opposite to the position, there are formed cooking ribs (6) and (7) for positioning when stacking sealed container lids with tabs (A) as products.

The squishing rib (6) is provided to protrude below the lid (a), and its lower surface is the same as the lower surface of the annular protrusion (b). a) Projects upward in a cylindrical shape, the top surface of which is provided with a knob (C
), and when such sealed container lids with tabs (A, ) are stacked, the cooking rib (6) of the upper one is aligned with the cooking rib (7) of the lower one. They fit together.

The lid (A) for a sealed container with a knob having the above configuration is as follows:
The lid material (a) is placed in a mold, and a synthetic resin is injection molded thereto to form a knob piece (C) together with an annular protrusion.

The lid for a sealed container with a tab (A) is fitted inside the opening (8) of the container body (B) of the sealed container with the annular protrusion (b), and the end surface of the opening of the container body (B) ( 9) and the lower surface of the lid material (a) are welded.

When opening the sealed container as described above, remove the tab (C) on the lid (a) from its end (10
) and lift it up, the tip (11) rotates downward about the center point (pc) where the knob (c) connects to the annular protrusion (b) through the hole (3) as a fulcrum. As a result, a break occurs at the perforation line (5) as well as at the thin wall portion (4) of the annular protrusion (b) of the lid member (a) in this portion.

Next, when the tab piece (C) is picked and pulled, the breakage spreads from the protruding portion (p) of the perforation line (5) to both sides and the package is opened.

This unsealing may be done on the entire circumference or on a part thereof, as long as the thin wall portion (4) and the perforation line (5) are provided.

A different form from the one shown in FIGS. 1 to 6 described above is shown in FIGS. 8 to 11.

The position of the thin part (4゛) of the annular protrusion (bo) and the perforation line (5") made temporarily on paper is not the same as in the above example, but the perforation line (5") is better. , is located slightly outside in plan view, and the connecting portion between the knob (C'') and the annular protrusion (bo) is formed by a transparent window (3 This is the position of the protrusion (p) of (p). The thin part (4') is the protruding part (p''
) along the outer edge of the

In Figure 8, the perforation line (5'
) and the thin section (4"), the perforation line is shown as a half-cut line (5").

The sealed container lid (A") with a knob having the above structure has the end (C") of the knob (C") when taking out the contents after fitting it onto the container body filled with contents. 1
0") and lift it up, the connecting part between the knob piece (Co) and the annular protrusion (bo) will be exposed to the end-widening mountain-shaped transparent window (3゛) drilled in the lid (a゛). At the protruding part (p), a break first occurs along the thin wall part (4'), and this break is made along the half-cut line (5) by pulling up the knob (Co).
゛).

(Effects of the Invention) The lid for a sealed container with a tab of the present invention has, as its lid material,
Since the paper board base material is laminated or coated with synthetic resin, it does not deform when handled in the mold during molding, making it easy to handle and making the lid as a product easy to use. Even if they come into contact with each other, there is no risk of damage, unlike lid plates that are mainly made of metal foil, so they are durable.

The annular protrusion with the thin wall on the synthetic resin side and the opening tab on the paper side are integrally molded with synthetic resin through a through hole drilled in the lid material, and the perforation line or half of the paper is temporarily formed. Since the cut cotton and the thin part of the annular protrusion correspond to each other, it is easy to open with a pick piece even though the base material is paper board, and the lid as a whole is mainly made of paper. Therefore, material costs are reduced and disposal after use is also easy.

In addition, in cases where there is a connecting portion between the knob and the annular protrusion through a mountain-shaped transparent window that widens at the end, which is drilled in the lid, when the knob is lifted, the thin-walled portion is first removed at the protrusion within the transparent window. However, since the transparent window is shaped like a mountain and widens at the end, it is easy to break, and the paper board is broken along the half-cut line at a position where it is easy to apply the force to pull up the knob. It is easy to cut, and the position of the thin part is slightly inside the half-cut line, so after the thin part is broken, the half-cut line of the paperboard is cut following this break. Overall, it becomes easier to open.

Moreover, in any case, since the lid for a sealed container with a tab is separated by the thin part of the annular protrusion and the part of the paper board for opening, the rim of the container body has The annular protrusion remains as a rim frame, which reinforces the rim of the container body, which not only makes it easier to attach and remove the outer lid prepared elsewhere, but also prevents the area near the outer concave edge of the container body from getting wet. Even if the container slips, the grip stops at the edge frame, so there is no possibility of dropping the container.

[Brief explanation of drawings]

Fig. 1 is a plan view of the lid for a sealed container with a knob according to the present invention, Fig. 2 is a back view of the same, Fig. 3 is an enlarged sectional view taken along the line Figure 5 is an enlarged cross-sectional view taken along lines X, -X:l in Figure 1, Figure 6 is an enlarged cross-sectional view taken along lines X, -X:l in Figure 1, and Figure 6 shows the lid in Figure 1 fitted tightly into the container body. FIG. 7 is a partial sectional view of the lid material, FIG. 8 is a plan view similar to FIG. 1 of another form, and FIG. 9 is a back view of FIG. 8. , FIG. 10 is an enlarged sectional view taken along the line X4X4 in FIG. 8, and FIG. 11 is an enlarged sectional view taken along the line X5-X5 in FIG. Code A: Lid for sealed container with tab B:
・・Container body a ・・・Lid material b ・・・・・Annular protruding strip protruding part Center point Paper board Synthetic resin layer Transparent hole Transparent window Thin part Perforation line Scratching rib Opening End face End tip Department

Claims (4)

[Claims] (1) For a lid material made of a paper board as a base material and a synthetic resin layer formed thereon, an annular protrusion that fits into the opening of the container body is inserted into the synthetic resin layer side through a hole bored in the lid material, and a paper board is inserted into the lid material. A knob piece is integrally injection-molded with synthetic resin on the side, and a thin part for tearing is formed on the inside of the annular protrusion, and this thin part corresponds to the tearing part for opening on the paperboard side. Also, a lid for a sealed container with a knob, characterized in that the lid is connected to the knob at a connecting portion passing through the through hole. (2) The separation part for opening on the paper board side is a perforation line or a half-cut line, and this position coincides with the thin part for separation of the annular protrusion injection-formed on the synthetic resin layer side. Claim (1) characterized in that
A lid for a sealed container with a knob as described. (3) Claim (1) characterized in that the connecting portion between the knob and the annular protrusion having the thin section for cutting is located at the outward protrusion of the thin section in plan view. ) A lid for a sealed container with a tab. (4) The seal with a knob according to claim (3), wherein the outwardly protruding portion of the thin wall portion in plan view is located at the top of a mountain-shaped transparent window that widens toward the end and is formed in the lid member. Container lid.