JP2020179888A - Container with lid - Google Patents

Abstract

To provide a container with a lid which allows a user to check a welded state of a lid easily, and in which the lid can be easily peeled from an end surface of an opening part.SOLUTION: A container with a lid includes: a hollow container body 1 having an opening part 1a; and a lid 2 attached to an end surface 1c of the opening part 1a so as to close the opening part 1a. The lid 2 is an injection molded article, is a multilayer structure including an easy-to-peel layer at least at a portion to be attached to the end surface 1c, and has a protrusion portion 2a protruding to the outside of the end surface 1c. The protrusion portion 2a has flexibility.SELECTED DRAWING: Figure 1

Description

The present invention relates to a container with a lid.

In order to store fluids, powders and the like, a container with a lid having a hollow container body having an opening and a lid for closing the opening during transportation or storage is used. A typical lid has an easy peel layer that is detachably attached to the end face of the opening. Such lidded containers may be further fitted with overcaps that cover the openings and lids. In that case, a male screw is formed on the outer peripheral portion of the opening of the container body, a female screw is formed on the inner peripheral portion of the overcap, and the overcap is attached to the container body by screwing the male screw and the female screw. In the state before taking out the contents, the opening of the container body containing the contents is closed with a lid having an easy peel layer, and further covered with an overcap. When removing the contents from this container, turn the overcap to release the male and female threads and remove the overcap. Then, by peeling the lid from the opening, the opening can be opened and the contents can be taken out.

As described above, in the general method of attaching the lid and the overcap to the container body containing the contents, the lid is fixed in advance inside the overcap as in the configuration described in Patent Documents 1 to 3. Fit it in tightly and attach this overcap to the opening of the container body. When the overcap is attached to the opening of the container body, the lid comes into contact with the end face of the opening. Therefore, a high-frequency electric field is applied to weld the lid to the end face of the opening. In this way, the opening is closed with a lid inside the overcap.

In the configuration described in Patent Document 1, an annular protrusion is provided on the inner peripheral portion of the overcap and below the position where the lid is fitted (on the container body side). Therefore, as described above, when the lid is welded to the end surface so as to close the opening and then the overcap is turned to remove it from the container body, an annular protrusion is formed on the outer peripheral portion of the lid as the overcap rises. Engage. If the removal of the overcap is continued with the annular protrusion engaged with the outer peripheral portion of the lid, the overcap is disengaged from the container body and the lid is peeled off from the end face of the opening and lifted.

JP-A-2002-205752 Japanese Unexamined Patent Publication No. 10-310156 Japanese Unexamined Patent Publication No. 10-287349

If the lid is welded to the opening inside the overcap with the overcap attached to the container body as in the configurations described in Patent Documents 1 to 3, the opening is sealed, that is, In order to check the welded state of the lid, it is necessary to remove the overcap from the container body. However, as in the invention described in Patent Document 1, in the configuration in which the lid is peeled off from the end face of the opening in the process of removing the overcap from the container body, the sealed state of the opening by the lid cannot be confirmed. Further, in the configuration in which the overcap can be removed from the container body while the lid is welded to the end face of the opening, the work of peeling the lid from the end face of the opening is troublesome.

Therefore, an object of the present invention is to provide a container with a lid, which allows the welded state of the lid to be easily confirmed and the lid to be easily peeled off from the end face of the opening.

The container with a lid of the present invention has a hollow container body having an opening and a lid attached to the end face of the opening so as to close the opening, and the lid is an injection molded product and is at least on the end face. It has a multi-layer structure including an easy peel layer in a portion to be attached, has a protruding portion protruding to the outside of the end face, and the protruding portion has flexibility.

According to the container with a lid of the present invention, the welded state of the lid can be easily confirmed, and the lid can be easily peeled off from the end face of the opening.

It is sectional drawing of the container with a lid of one Embodiment of this invention. It is an exploded sectional view of the container with a lid shown in FIG. (A) is an enlarged sectional view showing the lid of the container with a lid shown in FIG. 1, and (b) is a sectional view showing a part of the lid in an enlarged manner in detail. It is sectional drawing of the container body and the container with a lid provided with a lid and an overcap shown in FIGS. It is an exploded sectional view which shows a part of the container with a lid shown in FIG. It is sectional drawing which shows the attachment process of the overcap of the container with a lid shown in FIGS. 4-5. It is sectional drawing which shows the process which follows FIG. It is sectional drawing which shows the process which follows FIG. It is sectional drawing which shows the removal process of the overcap of the container with a lid shown in FIGS. 4-5. It is sectional drawing which shows the process which follows FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a sectional view of a container with a lid according to an embodiment of the present invention, and FIG. 2 shows an exploded sectional view thereof. The container with a lid includes a hollow container body 1 having an opening 1a and a lid 2 for closing the opening 1a. The container body 1 of the present embodiment is a bottle made of synthetic resin. A male screw 1b is formed on the outer peripheral portion of the portion (neck portion) of the container body 1 provided with the opening 1a. However, the shape and material of the container body 1 can be arbitrarily changed.

As shown in FIGS. 3 (a) and 3 (b), the lid 2 was formed by injection molding an arbitrary thermoplastic resin in a state where a prefabricated laminate was inserted into a mold (not shown). It is an insert molded product including the base 3. The laminate includes, for example, an adhesive layer 4 made of strongly adhesive polypropylene or the like and adheres to the base 3, a barrier layer 5 made of aluminum or the like, and an intermediate layer 6 made of polyethylene terephthalate (PET) or the like to give rigidity to the laminate. It is a multi-layer structure having an easy peel layer 7 made of weakly adhesive polypropylene or the like. The laminate is formed by laminating layers 4 to 7 formed by various film forming methods to each other. The adhesive layer 4 is a layer for strongly adhering the laminate to the thermoplastic resin of the base 3 formed by injection molding. The barrier layer 5 is a layer that effectively suppresses oxidative deterioration of the contents due to oxygen permeation from the outside, and when it is made of a metal foil such as aluminum, it generates heat when a high frequency electric field is applied to realize high frequency welding. be able to. The easy peel layer 7 is a layer that is attached to the end surface 1c of the opening 1a of the container body 1 by welding, but has a property of being easily peelable. By attaching the easy peel layer 7 to the end surface 1c of the opening 1a of the container body 1, the lid 2 is fixed in a state of closing the opening 1a. Further, a flexible projecting portion 2a projecting to the outside of the end surface 1c of the opening 1a, strictly speaking, projecting to the outside of the portion attached to the end surface 1c of the lid 2 is provided. In the present embodiment, a part of the base portion 3 made of polypropylene (PP) as an arbitrary thermoplastic resin protrudes to the outside of the portion to be attached to the end surface 1c of the opening 1a to form the protruding portion 2a. The protruding portion 2a of the present embodiment is provided over the entire circumference, and is curved downward, that is, toward the container body 1 side when the lid 2 is attached to the container body 1. The materials of the base 3, the adhesive layer 4, the barrier layer 5, the intermediate layer 6, and the easy peel layer 7 can be arbitrarily changed.

According to the container with a lid of the present embodiment, the sealed state of the opening 1a of the container body 1, that is, the welded state of the lid 2 can be easily confirmed. Further, the lid 2 can be easily peeled off by engaging a member for peeling the lid 2 (for example, an engaging claw described later) with the flexible protruding portion 2a.

The container with a lid of the embodiment shown in FIGS. 4 and 5 has an overcap 8 in addition to the container body 1 and the lid 2 shown in FIGS. The overcap 8 has a cylindrical shape with one end open and the other end having a bottom. A female screw 8a that can be screwed with the male screw 1b of the container body 1 is formed on the inner peripheral portion of the overcap 8. Further, a plurality of engaging claws 8b protruding inward are provided on the inner peripheral portion of the overcap 8. The forming position of the engaging claw 8b on the inner peripheral portion of the overcap 8 is on the back side of the female screw 8a, that is, on the closed end side, and the container body 1 is attached to the lid 2 and the container body 1. On the other side. In other words, the engaging claw 8b is located between the female screw 8a and the bottom. The diameter of the virtual circle drawn by connecting the tips of the plurality of engaging claws 8b on the inner peripheral portion of the overcap 8 is smaller than the outer diameter of the protruding portion 2a of the lid 2. Therefore, when the overcap 8 is attached to and detached from the container body 1, the engaging claw 8b engages with the protruding portion 2a of the lid 2.

A step of attaching the overcap 8 shown in FIGS. 4 to 5 to the container body 1 in a state where the opening 1a is closed by the lid 2 (see FIG. 3) as shown in FIGS. 1 and 2, and then the overcap 8 The process of removing the above will be described. First, as shown in FIG. 6, the overcap 8 is arranged so as to cover the opening 1a and the lid 2 from above. At this point, the engaging claw 8b of the overcap 8 is located above the protruding portion 2a of the lid 2 and is not in contact with the protruding portion 2a. Then, the overcap 8 is moved downward, that is, toward the container body 1 side while screwing the male screw 1b and the female screw 8a. In the process of moving the overcap 8 downward in this way, the engaging claw 8b comes into contact with the protruding portion 2a of the lid 2 from above. Since the protruding portion 2a is curved downward and has flexibility, as shown in FIG. 7, the protruding portion 2a abutted on the engaging claw 8b from above has a smaller outer diameter. It transforms like this. As a result, the engaging claw 8b moves further downward through the protruding portion 2a having a smaller outer diameter. As shown in FIG. 8, when the engaging claw 8b gets over the protruding portion 2a and moves further downward, the protruding portion 2a returns from the deformed state to the initial shape, and the outer diameter becomes large again. In this way, the container body 1 and the lid 2 are stored with the overcap 8 attached. As shown in FIG. 8, the engaging claw 8b may be held in a state of being in contact with the end surface of the protruding portion 2a from below, and although not shown, the engaging claw 8b is located further below the lower end of the protruding portion 2a and protrudes. It may be held in a state where it does not abut on the portion 2a.

As shown in FIG. 8, the overcap 8 is removed from the state where the opening 1a of the container body 1 is closed with the lid 2 and covered with the overcap 8 in order to take out the contents (not shown). When the overcap 8 is attached to the container body 1, the engaging claw 8b is located below the end surface of the protruding portion 2a. In this state, or while the overcap 8 is turned to raise the male screw 1b and the female screw 8a while releasing the screw, the engaging claw 8b comes into contact with the end surface of the protruding portion 2a from below. The protruding portion 2a is curved and extends downward from the portion attached to the end surface 1c of the opening 1a. As shown in FIG. 9, the downwardly curved protruding portion 2a is deformed to such an extent that the downwardly curved portion of the protruding portion 2a is slightly reduced. If the overcap 8 continues to rise in that state, the engaging claw 8b presses the protruding portion 2a upward. Since the easy peel layer 7 of the lid 2 attached to the end surface 1c of the opening 1a of the container body 1 has a characteristic of being easily peelable, before the protruding portion 2a is deformed until it is curved in the opposite direction (upward). In addition, as shown in FIG. 10, the lid 2 is lifted as the overcap 8 rises and is peeled off from the end surface 1c of the opening 1a. In this way, the overcap 8 is removed together with the lid 2.

As described above, in the container with a lid of the present invention, since the flexible protruding portion 2a is provided on the lid 2, the lid 2 can be easily peeled off by using the overcap 8 having the engaging claw 8b. be able to. Moreover, since the peeled lid 2 is housed inside the overcap 8, it is not necessary to dispose of it or store it separately. When the container body 1 is attached again to the overcap 8, the lid 2 inside the overcap 8 can close the opening 1a. Although not shown, the overcap 8 is used to reduce the weight, improve the ease of removing the lid 2 housed inside the overcap 8, and drain the treated water in the heat-pressurized sterilization (retort process). May be provided with a hole. Further, as described above, the welded state of the lid 2 can be easily confirmed before the overcap 8 is attached.

In the configuration shown in FIGS. 1 to 10, a protruding portion 2a is provided over the entire circumference of the lid 2, and is curved and extends toward the container body side. Therefore, when the engaging claw 8b engages with the protruding portion 2a when the overcap 8 is attached and moves toward the container body 1 side, the protruding portion 2a further shrinks the outer diameter to the container body 1 side. It is easily possible to deform so as to extend toward it. As a result, the engaging claw 8b can easily move over the protruding portion 2a and below the protruding portion 2a (on the container body 1 side) in accordance with the movement of the overcap 8. However, even if the engaging claw 8b that has once moved below the protruding portion 2a moves upward (opposite side of the container body 1) in accordance with the removal operation (rising) of the overcap 8, the protruding portion 2a Is pushed by the engaging claw 8b and deformed so as to be curved upward, as compared with the deformation of the protruding portion 2a when the overcap 8 moves downward. Since the protruding portion 2a is difficult to be deformed so as to be curved upward, it is lifted while resting on the engaging claw 8b. Eventually, the protruding portion 2a is lifted by overcoming the adhesive force of the opening 1a of the easy peel layer 7 to the end surface 1c, and the easy peel layer 7 of the lid 2 is peeled off from the end surface 1c. In this way, the engaging claw 8b can easily move downward over the protruding portion 2a, but it is difficult to get over the protruding portion 2a upward, and the protruding portion 2a is lifted as it is. In order to achieve this, as shown in each drawing, the protruding portion 2a preferably has a shape that curves downward (on the container body 1 side) and extends. The bending angle is preferably larger than 0 degrees and 80 degrees or less, and more preferably 45 degrees or more and 80 degrees or less. Further, in order to prevent the protruding portion 2a from being deformed so as to be curved upward, it is preferable that the protruding portion 2a is provided seamlessly over the entire circumference of the lid 2. The protruding portion 2a having such a shape also has an effect of facilitating positioning of the opening 1a of the lid 2 with respect to the end surface 1c. However, the present invention is not limited to these configurations, and the protruding portion 2a may extend laterally without being curved downward.

The protruding portion 2a can be easily deformed so as to be engaged with the engaging claw 8b and extend toward the container body 1 side while reducing the outer diameter, and is abutted and lifted from below by the engaging claw 8b. The size of the opening 1a is preferably 1.0 to 3.0 mm so as to project outward from the portion attached to the end surface 1c. Further, the radial dimension of the engaging claw 8b of the overcap 8 protruding inward of the overcap 8 is preferably 1.0 to 2.0 mm.

In the above-described example, the lid 2 is high-frequency welded to the end surface 1c of the opening 1a. Therefore, it has a barrier layer 5 made of, for example, an aluminum foil. However, the method of attaching the lid 2 to the end face 1c is not limited to high-frequency welding, and may be ultrasonic welding, adhesion with an adhesive, or the like. A barrier layer 5 made of a different material may be arranged depending on the method of attachment. The adhesive layer 4 constituting the outer surface of the laminate is preferably made of a material that strongly adheres to the base 3. This is because the laminated body does not fall off from the lid 2. The strong adhesion referred to here means that the injection-molded resin has an adhesiveness equal to or higher than that of polypropylene constituting the base material 3. Further, the lid 2 is preferably formed by insert molding. In particular, as shown in the figure, it is difficult and desirable to form the protruding portion 2a into a so-called cap-shaped shape that curves toward the container body 1 side over the entire circumference of the lid 2. It may not be possible to form the shape and strength of the lid, or it may be wrinkled. However, even a shape that is difficult to form by press working or the like can be easily formed by injection molding. Insert molding is particularly effective for forming the lid 2 containing the metal foil as the barrier layer 5 for high-frequency welding. Each layer of the lid 2 is preferably made of a material having heat resistance and pressure resistance so as not to be deteriorated when, for example, heat and pressure sterilization (retort step) of the contents is performed.

In the above description, the container body 1 side in the state where the lid 2 is attached to the container body 1 is referred to as the lower side, and the opposite side of the container body 1 (the bottom side of the lid 2) is referred to as the upper side. However, such a vertical definition may not always match the posture of the lidded container in actual use.

1 Container body 1a Opening 1b Male screw 1c End face 2 Lid 2a Protruding part 3 Base 4 Adhesive layer 5 Barrier layer 6 Intermediate layer 7 Easy peel layer 8 Overcap 8a Female screw 8b Engagement claw

Claims (6)

It has a hollow container body having an opening and a lid attached to the end face of the opening so as to close the opening.
The lid is an injection-molded product, has a multi-layer structure including an easy peel layer at least in a portion to be attached to the end face, and has a protruding portion protruding to the outside of the end face.
A container with a lid, wherein the protruding portion has flexibility. The container with a lid according to claim 1, wherein the protruding portion extends in a direction toward the container body side with the lid attached to the container body. The container with a lid according to claim 2, wherein the protruding portion is curved in a direction from the end face toward the container body, and the bending angle is 45 degrees or more and 80 degrees or less. The container with a lid according to any one of claims 1 to 3, wherein the lid is an insert molded product including a laminate containing at least the easy peel layer and a base integrated with the laminate. An overcap, which is attached to the container body so as to cover the opening and the lid, is further provided with an overcap having an opening at one end and a bottom at the other end, and the inner peripheral portion of the overcap is covered with the lid. The container with a lid according to any one of claims 1 to 4, which is provided with an engaging claw that engages with the protruding portion. A male screw is formed on the outer peripheral portion of the opening of the container body, a female screw that can be screwed with the male screw is formed on the inner peripheral portion of the overcap, and the engaging claw is the female screw. The container with a lid according to claim 5, which is located between the bottom and the bottom.

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