JPH0234201Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a lid for a container, and is used as a top lid that is removably fitted to a sealed container containing contents, such as a canned food or an oil can. In addition to being used as a lid, it can also be used as a lid for an ordinary open container that is not sealed.

[Conventional technology]

The lid has a synthetic resin lid frame with a receiving edge of an appropriate width protruding from the inner periphery of the fitting rim, and a paper sheet indicating the contents, product name, etc. is glued or welded to the top surface of the receiving edge. It is already publicly known.

In such a lid, the display sheet is fixed to the receiving edge either as is or with a resin film laminated on the underside, but in the former case, the paper material stretches due to moisture absorption, and in the latter case, the paper sheet expands due to moisture absorption. Due to the difference in shrinkage between the paper material and the resin film after welding, as well as the difference in expansion and contraction due to moisture absorption, the displayed paper sheet is likely to be distorted, causing uneven undulations, swelling, and twisting of the entire lid.

In order to solve this problem, in the past, as in Utility Model Application Publication No. 60-167762, the receiving edge was connected to the lid frame body through a thin buffer part, and the display sheet was placed only on the upper surface of this receiving edge. Welded or actual 60's
As in No. 16773, a receiving edge connected to the lid frame body through a thin buffer section is tilted upward toward the center, and the display sheet welded only to the top surface of this receiving edge bulges toward the center. There are products that are designed to reduce the elongation of the paper material due to moisture absorption in advance.

[Problems that this invention attempts to solve]

However, in the conventional configuration described above, (a) the buffer part that connects the receiving edge to the lid frame body is thin, so its supporting force is insufficient, and the display sheet and the receiving edge swing up and down. , or may sink. (b) With the structure in which the display sheet is bulged in the center, when a large number of containers equipped with this lid are stacked, the upper container will not be stable.
It is extremely unsuitable for display in stores, etc. (c) Since the receiving edge and the lid frame body are connected with each other through a thin buffer section, the manufacturing of molds and other parts becomes complicated and costs increase. It was hot.

[Means for solving problems]

This proposal attempts to solve all of the above problems.The fitting peripheral edge and the receiving edge protruding from the inner periphery with an appropriate width are integrally formed on the lid frame made of synthetic resin, and the upper surface of this receiving edge is In a container lid to which the outer periphery of the display sheet is welded or adhered, a plurality of waveforms whose diameter increases successively in the outer circumferential direction are formed on the outer periphery of the display sheet to be welded or adhered to the upper surface of the receiving edge. , the gist is that only the wavy lower surface protrusion is welded or adhered to the upper surface of the receiving edge.

Further, one waveform may be provided inside the waveform to be welded or bonded to the upper surface of the receiving edge, and this waveform may be left unfixed without being welded or bonded.

[Effect]

This lid forms a plurality of corrugations that gradually increase in diameter in the outer circumferential direction on the outer periphery of the display sheet, and only the lower protrusions of these corrugations are fixed to the upper surface of the receiving edge, and the upper protrusions of the corrugations are It's not fixed because it doesn't stick.

On the other hand, if the displayed paper is only paper, of course
Even when a resin film is laminated on the lower surface, the paper material on the upper surface absorbs moisture more than the resin film, and its elongation is also greater, so when the paper material absorbs moisture, it begins to elongate toward the peripheral edge. This elongation is caused by the fact that at the first lower protrusion, the paper material on the lower side near the fixed part is fixed and does not stretch, but the paper material on the upper side stretches toward the circumferential edge, and It is absorbed by the upper protrusion. The elongation that is not absorbed here is transmitted to the second lower surface protrusion, and is similarly absorbed by the second upper surface protrusion.

At this time, some twisting force is generated at each fixed lower protrusion because the degree of stretch absorption is different between the paper material on the lower side near the fixed part and the paper material on the upper side, but this twisting force also occurs. It is absorbed by each unfixed upper surface protrusion.

The elongation of the paper material mentioned above is within about 0.2 mm at one end in the radial direction, but by minutely absorbing and buffering this elongation and twisting force with each non-fixed top protrusion, the display paper No distortion occurs, and no swelling, twisting, uneven surface undulations, etc. occur.

Further, since the plurality of corrugated lower surface protrusions are fixed to the receiving edge, the airtightness and sealing performance of the lid are not impaired, and the strength required for the lid is sufficiently maintained.

〔Example〕

Hereinafter, drawings showing one embodiment of the present invention will be specifically described.

The lid frame 1 is made of a suitable synthetic resin such as styrene, and has a fitting peripheral edge 2 for fitting into a container (not shown) as in the conventional case, and a receiving edge 3 protruding from the inner circumference with an appropriate width. are integrated. The display sheet 4 is made of a commonly used paper material with a product name, manufacturer's name, etc. printed on the surface thereof, and a resin film such as polyethylene or polypropylene laminated on the bottom surface.

The display sheet 4 has a predetermined width portion from the outer periphery, that is, a portion 4a welded to the receiving edge 3, which is formed into a plurality of waveforms 5 whose diameter gradually increases in the outer circumferential direction by embossing. Only the lower surface protrusions 5a of the corrugations 5 are welded to the upper surface of the receiving edge 3, and the corrugated upper surface protrusions 5b are not welded and left unfixed.

In this way, only the lower surface protrusion 5a of the waveform 5 is connected to the receiving edge 3.
The display paper sheet 4 welded to the top surface absorbs moisture and stretches more than the resin film laminated to the bottom surface, so the paper material absorbs moisture and begins to stretch toward the peripheral edge. In the first lower protrusion 5'a, the paper material on the lower side near the resin film of the welded part is fixed and does not stretch, but the paper material on the upper side stretches toward the peripheral edge, and this elongation continues. Since the non-fixed upper surface protrusion 5b is provided, the elongation is absorbed in this portion, and the elongation that is not absorbed here is transmitted to the second lower surface protrusion 5a, and the elongation is similarly applied to the second upper surface protrusion 5b. Absorbed.

At this time, in the welded lower protrusions 5a, some twisting force is generated because the paper material on the lower side near the resin film and the paper material on the upper side have different degrees of elongation absorption, but this twisting force also occurs. It is absorbed by each non-fixed upper surface protrusion 5b.

The above-mentioned elongation of the paper material is within about 0.2 mm at one end in the radial direction, but by finely absorbing and buffering this elongation and twisting force with each non-fixed upper surface protrusion 5b, the display paper material can be 4, no distortion occurs, and no swelling, twisting, uneven surface undulations, etc. occur.

In addition, the plurality of lower surface protrusions 5a of the waveform 5 are connected to the receiving edge 3.
(3 in the embodiment shown in Fig. 2)
), the airtightness and airtightness of the lid is not impaired.
It also maintains sufficient strength required for the lid.

FIG. 4 shows a welded portion 4a having the above-mentioned waveform 5.
This shows an embodiment in which one waveform 5c is provided inside the wafer, and is not fixed without being welded.In this case, the waveform 5c expands and contracts without being subject to any restrictions, so there is no indication due to moisture absorption, etc. This has the advantage that the elongation of the paper leaf is better absorbed.

In the above embodiment, the display sheet 4 is made of a paper material with a resin film laminated on the lower surface, but the display sheet 4 may be made of only paper material. In this case, the lower surface protrusion 5a of the waveform 5 is adhered to the upper surface of the receiving edge 3, but the effect is the same.

〔effect〕

As mentioned above, according to the present invention, the welded or adhesive part of the display sheet is formed into a plurality of corrugations whose diameter increases successively in the outer circumferential direction, and only the protrusion on the lower surface is fixed to the receiving edge, so that the paper material can be The elongation and twisting force of the display sheet due to moisture absorption, etc., is well absorbed by the unfixed upper protrusion, and there is an effect that deformation of the lid caused by the strain can be completely prevented. In addition, since the display sheet is welded or glued to the upper surface of the receiving edge that is integrally formed with the fitting periphery, vertical swinging or sinking of the receiving edge and the display sheet is completely eliminated, and the display paper that is welded or glued Since the leaves are flat and do not bulge above the lid frame, there is no problem in stacking containers equipped with this lid, and the lid frame can be manufactured easily.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a plan view of the lid, FIG. 2 is a longitudinal side view of the center, FIG. 3 is an enlarged sectional view of the main part, and FIG. 4 is the main part of another embodiment. FIG. 1... Lid frame, 2... Fitting periphery, 3... Receiving edge, 4
...Display paper leaf, 5...Waveform, 5b, 5c...Non-fixed waveform.

Claims (1)

[Claims for Utility Model Registration] (1) A synthetic resin lid frame is integrally formed with a fitting peripheral edge and a receiving edge protruding from the inner circumference with an appropriate width, and on the upper surface of this receiving edge is a display sheet. In a container lid whose outer peripheral edge is welded or glued, a plurality of waveforms whose diameter increases successively in the outer circumferential direction are formed on the outer peripheral edge of the display sheet to be welded or glued to the upper surface of the receiving edge,
A lid for a container, characterized in that only the wavy lower protrusion is welded or adhered to the upper surface of the receiving edge. (2) The lid of a container according to claim 1, which is a utility model registration, wherein one waveform is provided on the inside side of the waveform to be welded or adhered to the upper surface of the receiving edge, and this waveform is not fixed.