JPH0417461Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a lid device with an inner stopper used for a wide-mouthed container made of metal or the like.

[Conventional technology]

This type of lid device with an inner stopper generally has an opening hole drilled in a lid made of a metal plate that fits over the mouth of a wide-mouthed container, and a cylindrical portion is bent and formed on the inner periphery of the lid. The inner stopper formed from a metal plate is inserted into and removed from this cylindrical part, but if the inner stopper is formed from a metal plate in this way, the lid body and the inner stopper can be manufactured with high dimensional accuracy. This not only increases processing time and manufacturing costs, but also makes opening the inner stopper extremely troublesome because it must be pried open with a screwdriver or the like.

Therefore, as prior art, Japanese Utility Model Publication No. 52-10689 and Japanese Utility Model Publication No. 59-24658 disclose that the inner circumferential edge of the lid body made of a metal plate is provided with an opening hole that extends toward the inside of the wide-mouthed container. A cylindrical portion is formed, and a synthetic resin inner plug that is fitted into and removed from the cylindrical portion and a synthetic resin holder that is fitted and fixed to the cylindrical portion are attached to the lid body. The holder is integrally molded so as to be connected to the holder via an annular thin-walled weakened line located at the lower end of the cylindrical portion, and a portion of the outer surface of the inner plug that is close to the cylindrical portion is formed integrally with the holder. ,
A lid device is disclosed in which a gripping piece for the inner plug is integrally formed, and the lid is opened by pulling the gripping piece to pull out the inner plug from the cylindrical portion and tearing the weakened line. There is.

[The problem that the idea aims to solve]

According to this prior art, the inner plug can be formed to tightly fit into the opening hole (cylindrical portion) of the lid through a simple process of integrally molding the inner plug with the lid, resulting in a high cost. Although it is a lid device with sealing performance, manufacturing costs can be reduced.Moreover, the inner plug can be elastically deformed and the inner plug is provided with a gripping piece, so that the inner plug can be attached to the lid body after opening. It has the advantage that it can be easily fitted and removed.

By the way, when opening the package by tearing a thin weakened line, it is necessary to form a tight tearing edge on the weakened line by pulling strongly on the base of the gripping piece of the weakened line. In order to do this, the inner plug must be greatly deformed so that the base of the gripping piece in the weakened line is greatly stretched. The rigidity of the inner stopper is increased by being connected to the holder, so
In order to deform the inner stopper, the gripping piece must be pulled with great force, which poses a problem in that it is troublesome to open.

To solve this problem, it may be possible to reduce the thickness of the weakening line, but in order to reduce the thickness of the weakening line to the extent that it can be torn by pulling it with a light force, Since the processing precision of the molding die must be increased and the molding process must be strictly controlled, the above-mentioned effect of reducing manufacturing costs will be diminished.

This invention enables the lid device, which consists of a metal plate lid body and a synthetic resin inner stopper integrally molded, to be made by using light force without increasing the precision of the mold or strictly controlling the molding process. The purpose is to provide the product in a form that can be easily opened.

[Means to solve the problem]

In order to achieve this object, the present invention has an opening hole of an appropriate shape formed in a lid made of a metal plate that fits into the mouth of a wide-mouth container, and the opening hole is formed on the inner periphery of the lid. small holes are bored at appropriate intervals along the inner periphery of the lid, and an inner stopper made of soft synthetic resin that removably fits into the opening hole to close it; A holder made of a soft synthetic resin that is irremovably attached to the inner surface of the periphery is integrally molded so that the inner plug and the holder are connected via a bridge portion fitted into the small hole, and A gripping piece for the inner stopper is provided at an appropriate location on the outer surface of the inner stopper along the inner periphery of the opening hole.

[Functions and effects of the idea]

With this structure, the wide-mouthed container can be opened by pulling the gripping piece to deform the inner stopper, pulling the inner stopper out from the opening hole, and tearing off the bridge portion.

In this case, the inner stopper is simply connected to the holder via bridges provided at appropriate intervals along the circumference of the opening hole, and the presence of the bridges increases the rigidity of the inner stopper. Therefore, the inner stopper fitted into the opening hole can be deformed with a light force, and tensile force can be concentratedly applied to the bridge part. The piece is pulled diagonally upward, and the bridge part comes into contact with the edge corner of the small hole in the lid body due to the tension by the gripping piece, so the edge angle of the small hole in the lid body The parts act as cutting blades for the bridge parts, and the tensile force can be concentratedly applied to these bridge parts, and the edge corner of the small hole in the lid body is used as the cutting blade for the bridge parts. This allows the package to be opened with light force.

In addition, in order to mold the bridge part that connects the inner stopper and the holder, the lid body is sandwiched between a pair of molds, and molten synthetic resin is injected into the cavity formed at the mating surface of both molds. In particular, when molding the inner stopper and retainer, it is sufficient to allow the molten synthetic resin to flow into the small hole, and in order to mold the bridge part, it is necessary to improve the precision of the mold and the molding process. Since there is no need for strict control, manufacturing costs do not increase due to the formation of the bridge portion.

Therefore, according to the present invention, by integrally molding the inner stopper with the lid body, a lid device that is easy to open and close after opening and has an improved sealing function can be produced at a low cost, and has the effect of being extremely easy to open.

〔Example〕

Next, the first embodiment of the present invention is shown in the drawings (first to second
To explain based on the figure), the reference numeral 1 in the figure
Reference numeral 2 indicates a cylindrical wide-mouth container made of an appropriate material such as a metal plate, synthetic resin, or hard paper, and reference numeral 2 indicates a lid device for the wide-mouth container 1.

The lid device 2 includes a lid 3 made of a thin metal plate such as aluminum or iron, and a cylindrical tube that fits into the mouth 1a of the wide-mouth container 1 is attached to the outer periphery of the lid 3. The lid body 3 can be fitted onto the wide-mouth container 1 by forming a mounting portion 3a and tightening or caulking the mounting portion 3a around the mouth portion 1a of the wide-mouth container 1.

Further, an opening hole 4 concentric with the lid 3 is formed in the lid 3, and an inner peripheral edge 3b of the lid 3 is provided.
Then, by bending the inner circumferential edge 3b into a U-shaped cross section, a cylindrical portion 3c extending inward into the wide-mouthed container 1 is formed. A small hole 5 is made. Then, a soft synthetic resin inner stopper 6 that is fitted into and removed from the cylindrical portion 3c and a soft synthetic resin holder 7 that is non-removably fitted into the cylindrical portion 3c are attached to the lid body 3. The plug 6 and the holder 7 are integrally molded so as to be connected to the bridge portion 8 in the small hole 5.

The inner stopper 6 consists of a cylindrical portion 6a that fits into the cylindrical portion 3c of the lid 3, and a plate 6b that closes the opening hole 4, and a portion of the outer surface of the plate 6b on the inner periphery of the opening hole 4. A pull ring 6c, which is an example of a holding piece, is integrally molded at an appropriate portion along the line.

The inner stopper 6 is formed with a flange 6d that the horizontal surface of the inner peripheral edge 3b of the lid body 3 comes into contact with, and
A radially outward recess 9 is formed in the cylindrical portion 3c of the lid body 3.
are formed in an annular shape or at appropriate intervals, and the protrusion of the cylindrical body 6a of the inner stopper 6 is engaged with this recess 9.

As the material for the inner plug 6 and the holder 7, appropriate soft synthetic resin such as polyethylene can be used.

In the above configuration, the seal can be opened by pulling the pull ring 6c, deforming the inner stopper 6, removing it from the cylindrical part 3c of the lid 3, and tearing off the bridge part 8. Later, the inner stopper 6 can be freely inserted into and removed from the cylindrical portion 3c of the lid body 3, and the wide-mouthed container 1 can be freely opened and closed.

Therefore, the inner stopper 6 and the holder 7 are connected to the opening hole 4.
The inner stopper 6 is simply connected via bridge portions 8 provided at appropriate intervals along the periphery of the inner stopper 6, and the rigidity of the inner stopper 6 is not increased due to the presence of the bridge portions 8. Since the inner stopper 6 fitted into the cylindrical portion 3c can be deformed with a light force,
A tensile force can be concentratedly applied to the bridge portion 8, and the inner stopper 6 can
By being pulled out along the surface, the edge corner of the small hole 5 acts as a cutting edge on the bridge portions 8, and a tensile force is concentratedly applied to these bridge portions 8. Because the edge corner of the small hole 5 in the lid body 3 can be used as a cutting edge for the bridge part 8, the bridge part 8 can be torn off with a light force, making it possible to open the package with a light force. It can be done easily.

In addition, the inner plug 6, the holder 7, and the bridge part 8
The molding of the bridge part 8 is carried out by injecting molten synthetic resin into a cavity formed at the mating surface of a pair of molds, with the lid body 3 held in place by a pair of molds. In order to be able to mold the bridge part 8, it is sufficient to simply flow the molten synthetic resin into the small hole 5, and in order to mold the bridge part 8, the precision of the mold must be increased and the molding process must be strictly controlled. Since this is not necessary at all, the effort required to manufacture molds and control the molding process can be reduced, and an increase in manufacturing costs can be reliably avoided.

In the case shown in FIGS. 3 and 4, when a cylindrical portion 3c is formed in the lid 3 as in the above embodiment, a small hole 5 is bored in the horizontal part of the inner peripheral edge 3b of the lid 3. This is a second embodiment in which a collar 6d of a stopper 6 and a holder 7 are connected via a bridge portion 8.

In this case as well, by pulling the pull ring 6c diagonally upward, the bridge portion 8 is pulled diagonally upward, and the edge corner of the small hole 5 acts as a cutting edge for the bridge portion 8. As in the example, it can be opened with light force.

In both of the above-mentioned embodiments, the lid body is opened wide to open the lid, but in the present invention, the shape and size of the opening hole 4 can be changed arbitrarily as shown in FIG. 5, for example. Furthermore, the gripping piece is not limited to a pull ring, but may have other shapes such as a T-shape.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing the first embodiment, Fig. 2 is an enlarged sectional view of Fig. 1, Fig. 3 is a view showing the operation, and Fig. 4 is an enlarged sectional view of Fig. 3. , FIG. 5 is a plan view showing another embodiment. 1... Wide mouth container, 2... Lid device, 3... Lid body,
3a... Attachment part, 3b... Inner peripheral edge, 3c... Cylindrical part, 4... Opening hole, 5... Small hole, 6... Inner plug,
6c...A pull ring as an example of a holding piece, 7...
...Holding body, 8...Bridge part.

Claims (1)

[Scope of utility model registration request] Appropriately shaped opening holes are formed in the lid made of a metal plate that fits into the mouth of the wide-mouthed container, and small opening holes are formed at appropriate intervals along the inner periphery of the opening holes on the inner periphery of the lid. a soft synthetic resin inner plug that is removably fitted into the opening hole to close it; and a soft plug that is irremovably attached to the inner surface of the inner periphery of the lid. A holding body made of synthetic resin is integrally molded so that the inner stopper and the holding body are connected through a bridge portion fitted into the small hole, and the opening hole is formed on the outer surface of the inner stopper. A lid device with an inner stopper for a wide-mouth container, characterized in that a gripping edge for the inner stopper is provided at an appropriate location along the inner circumference of the container.