CN108349639B - Container, container with lid, and method for manufacturing container with lid - Google Patents

Container, container with lid, and method for manufacturing container with lid Download PDF

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Publication number
CN108349639B
CN108349639B CN201680063518.7A CN201680063518A CN108349639B CN 108349639 B CN108349639 B CN 108349639B CN 201680063518 A CN201680063518 A CN 201680063518A CN 108349639 B CN108349639 B CN 108349639B
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CN
China
Prior art keywords
container
inner portion
lid
rotation axis
outer portion
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CN201680063518.7A
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Chinese (zh)
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CN108349639A (en
Inventor
加户卓
土田雅子
船岛谅
龟田克巳
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Dai Nippon Printing Co Ltd
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Dai Nippon Printing Co Ltd
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Priority claimed from JP2015213221A external-priority patent/JP6213544B2/en
Priority claimed from JP2016183355A external-priority patent/JP6902217B2/en
Application filed by Dai Nippon Printing Co Ltd filed Critical Dai Nippon Printing Co Ltd
Publication of CN108349639A publication Critical patent/CN108349639A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/34—Trays or like shallow containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Packages (AREA)
  • Closures For Containers (AREA)

Abstract

Provided is a container having excellent initial sealability and resealability. The container has a bottom surface, a side surface standing from the bottom surface, and a flange portion connected to an upper portion of the side surface. The flange portion includes: an inner portion continuously provided in connection with the side surface over the entire circumference; an outer portion located outside the inner portion; and a connecting portion provided between the inner portion and the outer portion, connecting the inner portion and the outer portion. The upper surface of the outer portion is located below the lower surface of the inner portion. The outer side portion is provided with a projection projecting toward the inner side portion side.

Description

Container, container with lid, and method for manufacturing container with lid
Technical Field
The present invention relates to a container having an opening formed therein. The present invention also relates to a container with a lid, which includes a container having an opening formed therein and a lid joined to the container so as to cover the opening, and a method for manufacturing the container.
Background
In recent years, as a container having an opening for storing food, chemical products, or the like, a container configured to stably cover the opening of the container even after a lid is temporarily removed from the container has been proposed. For example, patent document 1 proposes that a container having a tray and a lid frame configured to be separable from the tray is provided with a lid film welded to an upper surface of the tray and an upper surface of the lid frame. When the cover film is removed from the tray, the cover frame is also removed from the tray together with the cover film. The cover frame is configured to be fixed to the tray in a hanging manner. Therefore, the opening of the container can be covered stably again by covering the tray with the cover film removed from the tray and fixing the cover frame welded to the cover film to the tray by hooking and fixing.
Documents of the prior art
Patent document
Patent document 1: japanese Kokai publication (Japanese Kohyo publication 2014-502584)
Disclosure of Invention
In the above-mentioned patent document 1, when the opening of the container is covered again, the cover frame is fixed to the tray by being engaged and fixed, but actually, the resealability is not sufficient.
The present invention aims to provide a container and a container with a cover, and a method for manufacturing the container with the cover, which can effectively solve the above problems.
The present invention is a container having an opening formed therein, wherein the container comprises: a bottom surface; a side surface erected from the bottom surface; and a flange portion provided in connection with an upper portion of the side surface, the flange portion including: an inner portion continuously provided in connection with the side surface over an entire circumference; an outer portion located outside the inner portion; and a connecting portion provided between the inner portion and the outer portion, the connecting portion connecting the inner portion and the outer portion, an upper surface of the outer portion being located below a lower surface of the inner portion, and the outer portion being provided with a protrusion protruding inward of an outer end of the inner portion.
In the container of the present invention, the projection may project from an outer side end of the inner portion toward the inner side end by 0.1mm to 1.0 mm.
In the container of the present invention, the container may be made of a thermoplastic resin.
In the container of the present invention, the thickness of the connecting portion may be smaller than the thickness of the inner portion and the thickness of the outer portion.
In the container of the present invention, the connecting portion may be formed intermittently along the inner portion over the entire circumference.
In the container of the present invention, the connecting portion may be formed continuously along the inner portion and may function as a hinge portion.
In the container according to the present invention, the coupling portion may include a pair of hinge portions that couple the inner portion and the outer portion to define a rotation axis for rotating the outer portion with respect to the inner portion, and a portion of the inner portion may protrude outward from the rotation axis. The rotation axis is, for example, a straight line passing through a portion of one of the hinge portions located closest to a center point of the opening portion and a portion of the other hinge portion located closest to the center point of the opening portion.
In the container according to the present invention, a dimension of a portion of the inner portion that protrudes to an outer side of the rotation axis in a direction perpendicular to the rotation axis may be preferably 3mm or more.
In the container according to the present invention, a dimension of a portion of the inner portion that protrudes to the outside of the rotation axis in a direction perpendicular to the rotation axis may be preferably 10mm or less.
In the container according to the present invention, the inner portion may have a polygonal shape including a plurality of sides and a plurality of corners, and the pair of hinge portions of the coupling portion may couple the inner portion and the outer portion such that one side of the inner portion is located outward of the rotation axis.
In the container according to the present invention, the inner portion may have a polygonal shape including a plurality of sides and a plurality of corners, and the pair of hinge portions of the coupling portion may couple the inner portion and the outer portion such that at least a part of one corner of the inner portion is located outside the rotation axis.
The present invention is a container with a lid, comprising: a container having an opening formed therein; and a lid joined to the container so as to cover the opening of the container, the container having a bottom surface, a side surface standing from the bottom surface, and a flange portion connected to an upper portion of the side surface, the flange portion includes an inner portion continuously provided to be connected to the side surface over an entire circumference and an outer portion located outside the inner portion, the cover is continuously engaged with the upper surface of the inner portion over the entire circumference and at least partially engaged with the upper surface of the outer portion, the upper surface of the inner part and at least part of the upper surface of the outer part are positioned on the same plane, the lower surface of the outer portion is located lower than the lower surface of the inner portion, the outer portion is provided with a projection projecting inward of an outer end of the inner portion.
In the lidded container of the present invention, the flange portion may further include a coupling portion that couples the inner portion and the outer portion, and the coupling portion may include a pair of hinge portions that couple the inner portion and the outer portion to each other so as to define a rotation axis that rotates the outer portion with respect to the inner portion, and a portion of the inner portion may protrude outward of the rotation axis.
In the container with a lid according to the present invention, a portion of the upper surface of the inner portion that protrudes to the outside of the rotation axis may not be engaged with the lid.
In the container with a lid according to the present invention, the engagement force between the lid and the upper surface of the outer portion may be larger than the engagement force between the lid and the inner portion.
The invention provides a method for manufacturing a container with a cover, which comprises the following steps: preparing the container described above; placing a lid on an upper surface of the inner portion of the container; and pressing the upper surface of the inner portion downward with a hot plate via the cover while holding the lower surface of the outer portion of the container, thereby positioning the upper surface of the outer portion and the upper surface of the inner portion on the same plane and welding the cover to the upper surfaces of the inner portion and the outer portion.
According to the present invention, a container and a container with a lid, which are excellent in initial sealability and resealability, and a method for manufacturing the container with a lid, can be provided.
Drawings
Fig. 1 is an exploded view of the components that make up the lidded container of an embodiment of the present invention.
Fig. 2 is a perspective view showing the container before welding the lid.
Fig. 3 is a cross-sectional view of a portion of the lidded container including a tab.
Fig. 4 is a cross-sectional view of a portion of the container including the protrusion before welding the lid.
Fig. 5 is a sectional view of a portion of the lidded container including the connecting portion.
Fig. 6 is an enlarged cross-sectional view of a portion of the container including the connecting portion before welding the lid.
Fig. 7 is a plan view showing the container.
Fig. 8A is a diagram illustrating a method of manufacturing a container.
Fig. 8B is a diagram illustrating a method of manufacturing the container.
Fig. 8C is a diagram illustrating a method of manufacturing the container.
Fig. 9A is a diagram illustrating a method of manufacturing a container.
Fig. 9B is a diagram illustrating a method of manufacturing the container.
Fig. 9C is a diagram illustrating a method of manufacturing the container.
Fig. 10 is an enlarged view of fig. 9A.
Fig. 11 is a diagram illustrating an operation of the embodiment of the present invention.
Fig. 12 is a view showing a modification of the container with a lid.
Fig. 13 is a view showing a modification of the container with a cap.
Fig. 14A is a view showing a modification of the container with a cap.
Fig. 14B is a view showing a state where the lid of the lidded container shown in fig. 14A is opened.
Fig. 15 is a plan view showing a first joint portion and a second joint portion of the inner portion and the outer portion of the flange portion.
Fig. 16 is a plan view showing a modification of the container.
Fig. 17 is a diagram showing a lidded container with a lid and the container shown in fig. 16.
Fig. 18 is a sectional view showing a portion including a hinge portion of the coupling portion of the lidded container shown in fig. 17.
Fig. 19 is a view showing the function of the lidded container shown in fig. 17.
Fig. 20 is a diagram showing a modification of the container.
Fig. 21 is a diagram showing a modification of the container.
Fig. 22 is a diagram showing a modification of the container.
Fig. 23 is a diagram showing a lidded container with a lid and the container shown in fig. 22.
Fig. 24 is a diagram showing a modification of the container.
Fig. 25 is a diagram showing a lidded container with a lid and the container shown in fig. 24.
Detailed Description
< embodiment of the present invention >
Embodiments of the present invention will be described below with reference to fig. 1 to 11 and 15. First, the entire container 10 with a lid according to the present embodiment will be described with reference to fig. 1 and 2.
(Container with lid)
Fig. 1 is an exploded view of components constituting a lidded container 10, and fig. 2 is a view showing a container 20 constituting the lidded container 10, and is a perspective view of the container 20 in a state where it is not joined to a lid 50. The lidded container 10 has a container 20 formed with an opening 28 and a lid 50 joined to the container 20 so as to cover the opening 28 of the container 20. In the present specification, "joining" is a concept including both welding and adhesion. "fusion bonding" means that the lid 50 is attached to the container 20 by at least partially melting at least one of the container 20 and the lid 50. "adhesion" means that the lid 50 is attached to the container 20 using a component such as an adhesive that is separate from the container 20 and the lid 50.
In the present specification, if not otherwise specified, "lidded container" refers to a state in which the lid 50 is not removed once after the lid 50 is joined to the container 20. In the following description, the container 20 with the cover removed may be referred to as an unsealing container 21.
(Container)
Next, the container 20 will be explained. As shown in fig. 1 and 2, the container 20 includes: a bottom surface 22; a side surface 24 that is provided upright from the bottom surface 22 so as to extend over the entire circumference along an outer edge 22e of the bottom surface 22; and a flange 26 connected to an upper portion of the side surface 24. The lid 50 described above is engaged with the flange portion 26 of the container 20. Fig. 1 and 2 show an example in which the flange portion 26 is provided in connection with the upper edge of the side surface 24 and extends toward the outside in the horizontal direction. In the present specification, the terms "side surface", "upper part", "upper edge", and "upper surface", "lower surface", "horizontal direction", which will be described later, indicate the positions and directions of the lidded container 10, the container 20, the lid 50, and the components thereof, with reference to the state in which the lidded container 10 and the container 20 are placed with the bottom surface 22 of the container 20 positioned below.
Fig. 1 and 2 show an example in which the bottom surface 22 and the side surface 24 of the container 20 are configured such that the opening 28 has a rectangular outline in the horizontal direction. In the present embodiment, the concept of a quadrangle also includes a case where corners of the quadrangle are chamfered and the corners are formed into an arc shape protruding outward. The shape of the container 20 is not particularly limited as long as the desired content can be stored in the container 20. For example, the flange 26 defining the opening 28 may have a rectangular or polygonal contour in the horizontal direction. The contour of the bottom surface 22 may or may not be similar to the contours of the flange 26 and the lid 50.
The content stored in the container 20 is not particularly limited, and examples of the content include snacks such as nuts, dried fruits, pickles, and cakes and pastry. As will be described later, one of the features of the lidded container 10 of the present embodiment is that it has excellent initial sealability. As described later, the lidded container 10 of the present embodiment is also characterized in that the opening 28 of the unsealed container 21 can be covered with the lid 50 by covering the unsealed container 21 with the lid 50 again after the lid 50 is removed, that is, in that the resealability is excellent. The term "initial sealability" refers to the adhesion between the flange 26 of the container 20 and the lid 50 in a state in which the lid 50 is not removed even once after the lid 50 is joined to the container 20 in the lidded container 10.
(Flange part)
The flange 26 of the container 20 will be described in detail below with reference to fig. 1 to 7. Here, fig. 3 is a sectional view of a portion of the capped container 10 including the protrusion 36 described later, fig. 4 is an enlarged sectional view of a portion of the container 20 including the protrusion 36 before the cap 50 is welded, fig. 5 is a sectional view of a portion of the capped container 10 including the coupling portion 40 described later, and fig. 6 is an enlarged sectional view of a portion of the container 20 including the coupling portion before the cap 50 is welded.
Fig. 7 is a plan view showing the container 20, and fig. 15 is a plan view showing the container 10 with a lid. In order to avoid complication, fig. 15 is a diagram in which portions other than the inner portion 30 and the outer portion 35 of the flange portion 26 are omitted.
As shown in fig. 1 to 7, the flange portion 26 includes: an inner portion 30 continuously connected to the side surface 24 over the entire circumference; an outer portion 35 located outside the inner portion 30; and a connecting portion 40 provided between the inner portion 30 and the outer portion 35, and connecting the inner portion 30 and the outer portion 35. In the present specification, the term "outside" refers to a side away from the opening 28 of the container 20 in the horizontal direction. The term "inside" refers to a side closer to the opening 28 of the container 20 in the horizontal direction.
As shown in fig. 3 to 5, the container 10 with a lid according to the present embodiment is configured such that the outer portion 35 is removed from the container 20 (unsealing container 21) together with the lid 50 when the connecting portion 40 of the container 20 is broken to remove the lid 50 from the container 20. Therefore, in the state of the lidded container 10, the lid 50 is at least partially joined to the upper surface 35a of the outer portion 35.
As shown in fig. 7, the coupling portions 40 are intermittently provided at six places along the inside portion 30 over the entire circumference. In addition, the coupling portion 40 may be continuously provided along the inner portion 30 over the entire circumference. The outer portion 35 also extends continuously along the inner portion 30 over the entire circumference with the coupling portion 40 interposed therebetween. Further, as shown in fig. 15, the lower surface 50b of the cover 50 is continuously engaged with the upper surface 30a of the inside portion 30 over the entire circumference. By configuring the flange portion 26 and the lid 50 of the container 20 in this manner, the opening 28 of the container 20 can be sealed without a gap. That is, initial sealability can be expressed.
As shown in fig. 1, the flange portion 26 has an outer portion 35 continuously extending over the entire circumference. The shape of the outer portion 35 or the specific state of engagement between the lower surface 50b of the lid 50 and the upper surface 35a of the outer portion 35 is not particularly limited as long as the lid 50 can be removed from the container 20 while maintaining the state in which the outer portion 35 and the lid 50 are at least partially engaged. For example, in fig. 1, an example is shown in which the outer side portion 35 continuously extends along the inner side portion 30 over the entire circumference and the lower surface 50b of the cover 50 continuously engages with the upper surface 35a of the outer side portion 35 over the entire circumference, but is not limited thereto. Although not shown, the outer portion 35 may intermittently extend along the inner portion 30 over the entire circumference as long as the state in which the outer portion 35 and the lid 50 are at least partially engaged can be maintained when the lid 50 is removed from the container 20. In this case, the lower surface 50b of the cover 50 is continuously engaged with the upper surface 30a of the inner portion 30 over the entire circumference, and is at least partially engaged with the upper surface 35a of the outer portion 35. In this case, the opening 28 of the container 20 can be sealed without a gap by the engagement between the lower surface 50b of the lid 50 and the upper surface 30a of the inner portion 30. That is, initial sealability can be expressed. Further, by the engagement between the lower surface 50b of the lid 50 and the upper surface 35a of the outer portion 35, the state in which the outer portion 35 and the lid 50 are at least partially engaged can be maintained when the lid 50 is removed from the container 20.
In fig. 15, a first engagement portion, which is a portion where the lower surface 50b of the cover 50 and the upper surface 30A of the inner portion 30 are engaged, is denoted by reference numeral 30A, and a second engagement portion, which is a portion where the lower surface 50b of the cover 50 and the upper surface 35A of the outer portion 35 are engaged, is denoted by reference numeral 35A. In the present embodiment, an example is shown in which the first engaging portion 30A is formed not to reach the inner edge and the outer edge of the inside portion 30, and the second engaging portion 35A is formed not to reach the inner edge and the outer edge of the outside portion 35, but the first engaging portion 30A may be formed to reach the inner edge or/and the outer edge of the inside portion 30, and the second engaging portion 35A may be formed to reach the inner edge or/and the outer edge of the outside portion 35.
The engagement between the lid 50 and the flange portion 26 needs to be configured to enable the lid 50 to be removed from the container 20 while maintaining the state in which the outer portion 35 and the lid 50 are at least partially engaged. On the other hand, in the case where the engaging force of the second engaging portion 35A is smaller than the engaging force between the other portion of the container 20 and the lid 50, for example, the engaging force of the first engaging portion 30A, the following case is considered: when a force is applied to the grip portion 26x of the flange portion 26 of the container 20 in order to remove the lid 50 from the container 20, the lid 50 is peeled off from the upper surface 35a of the outer portion 35 before the lid 50 is peeled off from the upper surface 30a of the inner portion 30. In view of this point, it is preferable that the lidded container 10 be constructed so that the engaging force of the second engaging portion 35A is greater than the engaging force of the first engaging portion 30A. This can prevent the lid 50 from being peeled off from the upper surface 35a of the outer portion 35 when the lid 50 is removed from the container 20.
The engaging force of the first engaging portion 30A and the second engaging portion 35A can be measured using a Tensilon (テンシロ ン) tensile tester (for example, RTC-1310A manufactured by Orientec (オリエンテッ ク)).
An example of the process of measuring the joining force will be described below.
First, a sample in which the lid 50 and the flange portion 26 were joined together was cut into a width of 15 mm. Next, a part of the lid 50 is peeled off from the flange portion 26, and a part of the lid 50 is sandwiched by using one clamp of Tensilon and the flange portion 26 is sandwiched by using the other clamp. Then, the lid 50 was stretched at a stretching speed of 300mm/min so that the angle formed by a part of the lid and the flange 26 was 180 °. Further, the maximum value of the load measured when the other portion of the lid 50 is peeled off from each portion of the flange portion 26 is taken as the joining force between the lid 50 and each portion of the flange portion 26.
In addition, when a portion where the lid 50 is not joined to the flange portion 26 is included in the sample, the operation of partially peeling the lid 50 and the flange portion 26 before the load is measured can be omitted.
In calculating the joining force using the above-described measuring method, the joining force of the second joining portion 35A is preferably greater than 20N, more preferably greater than 30N, and the joining force of the first joining portion 30A is preferably 20N or less, more preferably 15N or less.
The specific structure and method for making the engaging force of the second engaging portion 35A larger than the engaging force of the first engaging portion 30A are not particularly limited. For example, a method of making the area or width of the second joining portion 35A larger than the area or width of the first joining portion 30A is considered. When the lid 50 and the flange portion 26 are joined together by welding by heating, the temperature at which the lid 50 is welded to the upper surface 35a of the outer portion 35 can be made higher than the temperature at which the lid 50 is welded to the upper surface 30a of the inner portion 30.
As described above, the coupling portion 40 is a portion that is broken when the lid 50 is removed from the container 20. It is also considered that if the strength of the connecting portion 40 is too high, the force applied to the flange portion 26 to break the connecting portion 40 is too high, and as a result, the portion of the container 20 other than the connecting portion 40 is broken or deformed. Therefore, the connecting portion 40 is configured to be able to be broken with an appropriate force. For example, as shown in fig. 6, the inner portion 30, the outer portion 35, and the coupling portion 40 are configured such that the thickness T3 of the coupling portion 40 is smaller than the thickness T1 of the inner portion 30 and the thickness T2 of the outer portion 35.
In addition, in fig. 3, there is shown an example in which the upper surfaces 30a, 35a and the lower surfaces 30b, 35b of the inner side portion 30 and the outer side portion 35, respectively, are parallel to each other, and thus the thicknesses T1, T2, T3 are constant regardless of the position. However, without being limited thereto, a case where the thicknesses T1, T2, and T3 vary depending on the position is also considered. For example, it is considered that the upper surfaces 30a and 35a and the lower surfaces 30b and 35b are not parallel to each other. Further, it is also conceivable that the thicknesses T1, T2, and T3 vary depending on the position because the outer portion 35 has the protrusion 36, the reinforcement portion 37, and the wall portion 38 as described later. In this case, the phrase "the thickness T3 of the coupling portion 40 is less than the thickness T1 of the inner portion 30 and the thickness T2 of the outer portion 35" may also mean "the average value of the thicknesses T3 is less than the average value of the thicknesses T1 and the average value of the thicknesses T2". Alternatively, it may also mean that "the maximum value of the thickness T3 is smaller than the maximum value of the thickness T1 and the maximum value of the thickness T2". Here, the thickness T3 of the coupling portion 40 refers to the thickness of the coupling portion 40 in the horizontal direction, and the thicknesses of the inner portion 30 and the outer portion 35 refer to the thicknesses of the inner portion 30 and the outer portion 35 in the vertical direction, respectively.
The smaller the thickness T3, the more easily the joining portion 40 breaks. Therefore, if the ease of opening the lidded container 10 is taken into consideration, the thickness T3 of the connecting portion 40 is preferably small. On the other hand, if the thickness T3 of the connecting portion 40 is too small, the connecting portion 40 may be broken by an impact or the like applied to the container 20 in a state before the lid 50 is joined or in a process of joining the lid 50 to the container 20. In view of these points, it is preferable that the thickness T3 of the coupling portion 40 be set to 0.2mm or more and 0.8mm or less. Preferably, the thickness T1 of the inner portion 30 and the thickness T2 of the outer portion 35 are set such that the thickness T3 of the coupling portion 40 is 50% or less of the thickness T1 of the inner portion 30 and the thickness T2 of the outer portion 35. The thickness T1 of the inner portion 30 and the thickness T2 of the outer portion 35 are set to be, for example, 0.5mm or more and 2.0mm or less.
As shown in fig. 4 and 6, the thickness T2 of the outboard portion 35 may be greater than the thickness T1 of the inboard portion 30. For example, the thickness T2 of the outer portion 35 is 1.5 times or more, more preferably 2 times or more, the thickness T1 of the inner portion 30.
From the viewpoint of ease of opening and suppression of undesirable breakage, the connecting portion 40 is preferably provided in a region of 0.1% to 5.0% of the outer periphery of the inner portion 30 of the flange portion 26, and more preferably in a region of 0.3% to 3.0%. In addition, as shown in fig. 7, in the present embodiment, the coupling portion 40 is provided in an area of 0.5% of the outer periphery of the inner portion 30.
Further, the width W1 of the inner portion is set to be in the range of 4mm or more in order to improve the sealing property between the container 20 and the lid 50. Further, the width W2 of the outer portion 35 is preferably set so that the lid 50 is not separated from the outer portion 35 when the lid 50 is removed from the container 20, and so that the lid 50 can be easily positioned on the upper surface 35a of the outer portion 35 in the process of joining the lid 50 to the container 20. For example, the width W2 of the outer portion 35 is preferably set to 3mm or more. This improves the manufacturing workability when joining the lid 50 to the outer portion 35 of the flange portion 26, and also makes it easy to pick up the outer portion 35 when removing the lid 50 from the container 20. Further, for example, the width W3 of the first engaging portion 30A is set to be 1mm or more and 2mm or less. The width W4 of the second engaging portion 35A is preferably set to 2mm or more, and preferably 3mm or more. Also, the width W4 of the second engaging portion 35A is preferably set to 1 time or more, more preferably 1.5 times or more, the width W3 of the first engaging portion 30A. This makes it possible to easily ensure initial sealing performance and to make it difficult for the lid 50 to separate from the outer portion 35 when the lid 50 is removed from the container 20.
Next, the positions of the inner portion 30, the outer portion 35, and the connecting portion 40 in the vertical direction of the lidded container 10 will be described. In the present embodiment, at least the portion of the upper surface 30a of the inner portion 30 and the upper surface 35a of the outer portion 35 that contacts the lower surface 50b of the cover 50 are located on the same plane. Fig. 3 and 5 show an example in which the entire upper surface 30a of the inner portion 30 and the entire upper surface 35a of the outer portion 35 are located on the same horizontal plane in the case where the lid 50 is welded to the flange portion 26. Therefore, the lower surface 50b of the cover 50 can be more uniformly joined to the upper surfaces 30a, 35a of the inner portion 30 and the outer portion 35. That is, the lid 50 can be stably joined to the flange portion 26 of the container 20. This can suppress variation in the joining force between the flange portion 26 of the container 20 and the lid 50 depending on the position or the individual, and can form the lidded container 10 excellent in initial sealability.
The phrase "the upper surface 30a of the inner portion 30 and the upper surface 35a of the outer portion 35 are on the same plane" means that the difference between the vertical position of the end portion on the connecting portion 40 side in the upper surface 30a of the inner portion 30 and the vertical position of the end portion on the connecting portion 40 side in the upper surface 35a of the outer portion 35 is 0.5mm or less, and more preferably 0.2mm or less.
Preferably, an angle formed by a portion of the upper surface 30a of the inner portion 30 contacting the lower surface 50b of the cover 50 and a portion of the upper surface 35a of the outer portion 35 contacting the lower surface 50b of the cover 50 is ± 30 degrees or less.
The material comprising the container 20 and the method of manufacturing the container 20 are selected so that the upper surface 35a of the outer portion 35 can at least partially engage the lower surface 50b of the lid 50. For example, the bottom surface 22, the side surface 24, and the flange 26 may be integrally formed by injection molding using a resin. As the resin constituting the container 20, for example, a thermoplastic resin such as polypropylene can be used.
Next, the structure of the flange portion 26 for improving the resealability of the lidded container 10 will be described. As shown in fig. 3, the lower surface 35b of the outer portion 35 of the flange portion 26 is located below the lower surface 30b of the inner portion 30, and the outer portion 35 is provided with a protrusion 36 that protrudes inward of the outer end 30e of the inner portion 30. Therefore, the outer portion 35 can be firmly fixed to the inner portion 30. That is, the resealable property of the openable container 21 can be made excellent. The four projections 36 are provided at four corners of the outer portion 35 in total in a plan view (see fig. 7).
The protrusion 36 preferably protrudes from the outer end 30e of the inner portion 30 to the inner portion 30 side within a range of 0.1mm to 1.0mm, and more preferably protrudes from the outer end to the inner portion 30 side within a range of 0.2mm to 0.5 mm. In fig. 4, the length from the outer end 30e of the inner portion to the front end of the projection 36 is denoted by reference numeral L1. When the length L1 from the outer end 30e of the inner portion to the tip of the projection 36 is 0.1mm or less, it is difficult to sufficiently exhibit resealability, and when it is 1.0mm or more, it is difficult to remove the lid 50 from the container 20 in a state where the outer portion 35 is joined.
The projection 36 can be provided, for example, above the lower surface 35b of the outer portion 35, and can be provided in a region between the lower surface 30b of the inner portion 30 and the lower surface 35b of the outer portion 35. By bringing the protrusion 36 into proximity with or into contact with the lower surface 30b of the inner portion 30, the resealability of the unsealed container 21 can be improved. For example, fig. 3 illustrates the lidded container 10 in which the lower surface 30b of the inner portion 30 of the flange portion 26 is close to the projection 36 and a gap D1 is provided between the lower surface 30b of the inner portion 30 of the flange portion 26 and the projection 36, but the invention is not limited thereto. In the capped container 10, the lower surface 36b of the inner portion 30 of the flange portion 26 may abut against the projection 36. The same applies to the opening container 21 covered with the lid 50 in a state where the outer portion 35 is joined. The gap D1 is preferably set to 0.5mm or less. If the gap D1 is 0.5mm or less, the resealability of the unsealed container 21 can be improved.
The projection 36 is preferably provided so as to be able to abut on 25% or more, more preferably 50% or more, of the outer periphery of the inner portion 30 of the flange portion 26. This improves the resealability of the opening container 21. The projection 36 is preferably provided so as to be able to abut on a region of 5% or less, more preferably 3% or less, of the outer periphery of the inner portion 30 of the flange portion 26. This makes it possible to easily remove the lid 50 from the container 20 in a state where the outer portion 35 is joined thereto.
Next, a preferred embodiment of the container 20 in a state where the lid 50 is not engaged therewith will be described. As described above, fig. 3 and 5 are sectional views of the container 10 with the cap, and fig. 4 and 6 are sectional views of the container 20 in a state where the cap 50 is not engaged.
As shown in fig. 4 and 6, in the container 20 in a state where the lid 50 is not engaged, the upper surface 35a of the outer portion 35 of the flange portion 26 is located below the upper surface 30a of the inner portion 30. Preferably, the upper surface 35a of the outer portion 35 of the flange portion 26 is located below the lower surface 30b of the inner portion 30.
When the lid 50 is to be welded to the container 20, as shown in fig. 4 and 6, the lower surface of the flange portion 26 of the container 20 is held by the holder 70, and the lid 50 is placed on the flange portion 26 of the container 20. Here, the retainer 70 is formed so that the upper surface 30a of the inner portion 30 of the flange portion 26 and the upper surface 35a of the outer portion 35 are positioned on the same plane when the flange portion 26 and the lid 50 are welded together. Specifically, the retainer 70 is formed such that a portion of the retainer 70 abutting the inner portion 30 is protruded more than a portion of the retainer 70 abutting the outer portion 35. Next, in a state where the lower surface of the flange portion 26 of the container 20 is held by the holder 70, the first hot plate 75 and the second hot plate 76 are lowered from above the cover 50 with respect to the inner portion 30 and the outer portion 35 of the flange portion 26, respectively.
Thereby, the upper surface 30a of the inner portion 30 is pressed downward by the first hot plate 75 through the cover 50. As a result, the outer portion 35 of the flange portion 26 can be raised relative to the inner portion 30, and the upper surface 35a of the outer portion 35 and the upper surface 30a of the inner portion 30 can be positioned on the same plane. In this case, the upper surface 30a of the inner portion 30 and the upper surface 35a of the outer portion 35 and the lower surface 50b of the cover 50 are heated and welded together between the retainer 70 and the first and second hot plates 75 and 50. In the above example, the example in which the first hot plate 75 and the second hot plate 76 are used has been described, but heating may be performed using one hot plate.
During this time, the coupling portions 40 provided at six places in the same direction between the inner portion 30 and the outer portion 35 are bent and left between the inner portion 30 and the outer portion 35. Alternatively, it is also considered that the connecting portion 40 is broken from the inner portion 30 or the outer portion 35 during the welding operation.
In this way, the inner portion 30, the outer portion 35, and the lid 50 are heat-welded between the holder 70 and the first and second hot plates 76, whereby the lidded container 10 including the container 20 and the lid 50 can be obtained. When the connecting portion 40 is broken from the inner portion 30 or the outer portion 35 as described above, the container 20 as the lidded container 10 does not include the connecting portion 40.
(lid)
Next, the cap 50 joined to the container 20 will be explained. The material constituting the cover 50 is selected so that the lower surface 50b of the cover 50 can be engaged with the upper surface 30a of the inner portion 30 and the upper surface 35a of the outer portion 35. For example, the cover 50 includes a base layer and a sealing layer constituting the lower surface 50b of the cover 50. The thickness of the cover 50 is, for example, 20 μm or more and 100 μm or less.
As a material constituting the base layer, a polyester resin such as polyethylene terephthalate, a polyamide resin such as nylon, polypropylene, or the like can be used. As a material constituting the sealing layer, polypropylene, a mixed resin of polypropylene and polyethylene, or the like can be used. When the base layer and the sealant layer both contain polypropylene, biaxially oriented polypropylene is used for the base layer, and non-oriented polypropylene is used for the sealant layer.
The "mixed resin of polypropylene and polyethylene" is also referred to as an easy-peel sealant, and has a relatively small bonding force. Therefore, when the sealing layer of the lid 50 includes a mixed resin of polypropylene and polyethylene, the lower surface 50b of the lid 50 can be reliably joined to the upper surface 35a of the outer portion 35 and the upper surface 30a of the inner portion 30 of the flange portion 26 of the container 20. When the sealing layer of the lid 50 includes a mixed resin of polypropylene and polyethylene, the joining force between the lid 50 and the flange 26 calculated by the method using the tensile tester or the like is preferably 20N or less, and more preferably 15N or less.
On the other hand, in the case where the sealing layer of the cap 50 is made of polypropylene monomer, the bonding force is larger than that in the case where a mixed resin of polypropylene and polyethylene is used.
(method of manufacturing Container)
Next, a method for manufacturing the container 20 will be described with reference to fig. 8A to 10. An example of manufacturing the container 20 by an injection molding method will be described below.
First, the first mold 81 on the upper surface side of the flange portion 26 is opposed to the second mold 82 on the lower surface side of the flange portion 26 (see fig. 8A), and then the first mold 81 and the second mold 82 are closed to form a predetermined cavity space (see fig. 8B). Next, a molten resin 83 is injected into the cavity space from a gate 81a of the first mold 81, and the resin 83 is solidified between the first mold 81 and the second mold 82, thereby molding the container 20 (see fig. 8C). As the resin 83, for example, a thermoplastic resin can be used.
Next, the first mold is pulled up to be separated from the second mold 82 while the container 20 is held by the second mold 82 (see fig. 9A).
This state is shown in the enlarged view shown in fig. 10. As shown in fig. 10, by separating the first die 81 from the second die 82, a region where the flange portion 26 can be deformed upward or sideward is secured.
That is, the protrusion 36 protruding toward the inner portion 30 is provided in the outer portion 35, and the protrusion 36 enters the second mold 82, but the container 20 having the protrusion 36 in the flange portion 26 can be released from the second mold 82 by securing a region in the second mold 82, which can deform the flange portion 26 upward or sideways.
Next, as shown in fig. 9B, the bottom surface 22 of the container 20 is lifted up by the first pins 82a provided in the second mold 82, and the flange 26 is lifted up by the second pins 82B.
In this case, since the first die 81 and the second die 82 are separated in advance, the flange 26 can be deformed upward or sideways when the flange 26 is pushed up by the second pin 82b, and therefore the container 20 can be released from the second die 82.
Next, as shown in fig. 9C, the bottom surface 22 of the container 20 is sucked by the suction mechanism 85, and the container 20 can be discharged outward from the first mold 81 and the second mold 82 by the suction mechanism 85.
In the present embodiment, an example in which the first die 81 and the second die 82 are arranged in the vertical direction is shown, but the present invention is not limited thereto, and the first die 81 and the second die 82 may be arranged in the horizontal direction.
(method of manufacturing Container with lid)
Next, an example of a method for manufacturing the capped container 10 will be described.
First, as described above, the container 20 having the bottom surface 22, the side surface 24, and the flange portion 26 formed integrally is formed by injection molding. In this case, the container 20 has a structure before the lid 50 is welded (see fig. 4 and 6). Then, a lid 50 having a contour corresponding to the flange portion 26 of the container 20 is prepared. Next, as described above, the lower surface 35b of the outer portion 35 of the flange portion 26 of the container 20 is held by the holder 70, and the lid 50 is placed on the upper surface 30a of the inner portion 30. In a state where the flange portion 26 of the container 20 is held by the holder 70, the first and second heat plates 75, 76 are lowered with respect to the inner portion 30 and the outer portion 35, respectively. At this time, the lid 50 is heated from the upper surface 50a side at portions corresponding to the inner portion 30 and the outer portion 35 of the flange portion 26 of the container 20, and the sealing layer of the lid 50 is melted. This enables the lid 50 to be welded to the upper surface 30a of the inner portion 30 and the upper surface 35a of the outer portion 35 of the flange portion 26 of the container 20. At this time, the flange 26 may be melted.
In this way, a lidded container 10 with a container 20 and lid 50 is obtained. In this case, the inner portion 30 and the lid 50 are welded together, so that the opening 28 of the container 20 can be sealed without a gap. That is, initial sealability can be expressed. The upper surface 30a of the inner portion 30 and the upper surface 35a of the outer portion 35 are at least partially on the same plane. Therefore, the lidded container 10 having excellent initial sealability can be formed.
(method of unsealing Container with lid)
Next, an example of a method of unsealing the lidded container 10 will be described.
First, as indicated by reference numeral Fa in fig. 1, an upward force is applied to a part of the grip portion 26x of the flange portion 26 of the container 20 to break the connecting portion 40. At the same time, the cover 50 is peeled off from the upper surface 30a of the inside part 30. Thus, as shown in fig. 11, the lid 50 in the state where the outer portion 35 is joined can be removed from the container 20, and the container 20 can be made the openable container 21. In addition, when the connecting portion 40 is broken when the lidded container 10 is manufactured, the work of breaking the connecting portion 40 is omitted.
In the present embodiment, as described above, the lid 50 is removed from the container 20 in a state where the outer portion 35 is joined thereto. Then, the opening 28 of the opening container 21 can be covered again with the lid 50 in a state where the outside portion 35 is joined. For example, the unsealing container 21 can be resealed by covering the container 20 with the lid 50 such that the outer portion 35 joined to the lid 50 is positioned outside the inner portion 30 of the unsealing container 21 (see fig. 3). At this time, the projecting portion 36 of the outer portion 35 of the flange portion 26 projects inward of the outer end 30e of the inner portion 30, so that the outer portion 35 can be firmly fixed to the inner portion 30. That is, the resealable property of the openable container 21 can be made excellent.
Further, in the present embodiment, since the lid 50 in the state where the outer portion 35 is joined is removed from the container 20, the lid 50 can be suppressed from being deformed, for example, the lid 50 is bent or curled, as compared with a case where the lid 50 is removed alone from the container 20. Therefore, when the unsealing container 21 is resealed using the lid 50, the flatness of the lid 50 can be maintained more stably.
In addition, various modifications can be made to the above-described embodiments. Hereinafter, modifications will be described with reference to the drawings as necessary. In the following description and the drawings used in the following description, the same reference numerals as those used for corresponding portions in the above-described embodiments are used for portions that can be configured in the same manner as in the above-described embodiments, and redundant description is omitted. In addition, if it is apparent that the operational effects obtained in the above-described embodiment can be obtained also in the modified examples, the description thereof may be omitted.
(modification of outer part)
Next, a modified example of the present invention will be described. As shown in fig. 12, the outer portion 35 may have a wall portion 38, and the wall portion 38 may be located above the upper surface 35a of the outer portion 35 and outside the cover 50. By providing such a wall portion 38 to surround the lid 50 of the lidded container 10 from the outside, intentional or unintentional peeling of the lid 50 of the lidded container 10 from the outer portion 35 of the flange portion 26 of the container 20 can be suppressed. Further, the rigidity of the outer portion 35 can be improved by providing the wall portion 38. This can further suppress the lid 50 from being bent or curled after being removed from the container 20. When the connecting portion 40 is broken to open the lidded container 10, the portion of the outer portion 35 where the wall 38 is provided can be easily grasped with a finger or the like. Therefore, the opening performance of the lidded container 10 can be improved.
(modification of outer part)
As shown in fig. 13, a reinforcing portion 37 extending downward may be provided at the outer portion 35. By providing the reinforcement portion 37, the rigidity of the outer portion 35 can be improved. This can further suppress the lid 50 from being bent or curled after being removed from the container 20. In the present modification, the reinforcement portion 37 extends along the inner end 35e of the outer portion 35. In this case, when the lid 50 is closed on the opening container 21, the end portion of the reinforcing portion 37 on the inner portion 30 side abuts on the end portion 30e on the outer side of the inner portion 30, whereby the inclined surface 35c can function as a guide for guiding the lid 50 downward. Therefore, the resealing operation can be easily performed. In order to effectively exhibit the function as a guide of the reinforcement portion 37, the length L of the reinforcement portion 37 is preferably 2mm or more. The inner end 37e of the reinforcing portion 37 may be provided with an inclined surface 35c inclined downward toward the outside. This makes it possible to more easily perform the resealing operation.
(first modification of the connecting portion)
Further, in the above embodiment, the example in which the coupling portion 40 is intermittently provided at six places along the inner portion 30 is shown, but the present invention is not limited to this, and as shown in fig. 14A, the coupling portion 40 may be intermittently provided at four places along the inner portion 30, and the protrusion 36 of the outer portion 35 may be provided at the corner of the four corners of the outer portion 35. As shown in fig. 14A, a continuous additional connecting portion 40A is provided between the inner portion 30 and the outer portion 35 in a region opposed to the pinching portion 26x and sandwiched between the protrusion 36 and the protrusion 36 in the present modification at one side edge of the flange portion 26 in plan view.
The continuous additional coupling portion 40A is provided at one side edge of the flange portion 26, and does not cut when the lid 50 is removed from the container 20 by gripping the grip portion 26x, and when the lid 50 is opened and closed at the time of resealing, the coupling portion 40A functions as a hinge as shown in fig. 14B. In this case, the length L2 of the connecting portion 40A can be set to 5mm or more.
(second modification of the connecting portion)
In this modification, an example will be described in which a part of the coupling portion functions as a hinge, as in the case of the first modification of the coupling portion described above. Fig. 16 is a plan view showing a container 20 according to this modification. Fig. 17 is a plan view showing the lidded container 10 having the container 20 shown in fig. 16 and a lid 50 joined to the flange portion 26 of the container 20. In order to avoid complication, fig. 17 is a diagram in which portions other than the inner portion 30, the outer portion 35, and the coupling portion 40 of the flange portion 26 are omitted. Fig. 18 is an enlarged cross-sectional view of a portion of the coupling portion 40 of the lidded container 10 including a hinge 42 described later.
As shown in fig. 16, the outer edge of the inner portion 30 of the flange portion 26 has a rectangular outline including four sides (a first side 26a, a second side 26b, a third side 26c, and a fourth side 26 d). The first side 26a faces the third side 26c, and the second side 26b faces the fourth side 26 d. In the example shown in fig. 16, the first side 26a and the third side 26c are long sides parallel to each other. Also, the second side 26b and the fourth side 26d are short sides that are shorter than the first side 26a and the third side 26c and are parallel to each other.
In fig. 16, reference numerals 26e, 26f, 26g, and 26h denote portions (hereinafter, referred to as corners) where two sides are connected. The first corner 26e is located between the first side 26a and the second side 26b, the second corner 26f is located between the second side 26b and the third side 26c, the third corner 26g is located between the third side 26c and the fourth side 26d, and the fourth corner 26h is located between the fourth side 26d and the first side 26 a.
As shown in fig. 16, the coupling portion 40 includes a coupling portion 41 and a pair of hinge portions 42. The joint portion 41 is a portion that needs to be broken when the lidded container 10 is unsealed. The coupling portion 41 in the present modification corresponds to the coupling portion 40 in the example shown in fig. 1 to 15. The thickness of the joint portion 41 is the same as the thickness T3 of the coupling portion 40 in the example shown in fig. 1 to 15, and therefore, detailed description thereof is omitted. The hinge portion 42 is a portion that continues to connect the inside portion 30 and the outside portion 35 even after the lidded container 10 is opened. As will be described later, the pair of hinge portions 42 define a rotation axis a for rotating the outer portion 35, which is separated from the inner portion 30 of the flange portion 26 of the container 20 together with the lid 50, with respect to the inner portion 30. At least a part of the outer portion 35 exists at any position of the outer side position and the inner side position of the rotation axis a.
The lidded container 10 of this modification is configured such that, when the lid 50 is removed from the container 20, the portion of the outer portion 35 that is not connected to the hinge portion 42 of the connecting portion 40 is removed from the container 20 (unsealing container 21) together with the lid 50. In the state of the lidded container 10, the lid 50 is at least partially joined to the upper surface 35a of the outer portion 35.
As shown in fig. 16, the coupling portions 41 of the coupling portion 40 are intermittently provided at a plurality of places, for example, four places, along the inner portion 30. In addition, the joining portion 41 may be provided continuously along the inner portion 30. The outer portion 35 extends continuously along the inner portion 30 over the entire circumference with the coupling portion 40 interposed therebetween. Further, as shown in fig. 17, the lower surface 50b of the cover 50 is continuously engaged with the upper surface 30a of the inside portion 30 over the entire circumference. By configuring the flange portion 26 and the lid 50 of the container 20 in this manner, the opening 28 of the container 20 can be sealed without a gap. That is, initial sealability can be expressed.
In the present modification, the protrusion 36 may be provided in a portion of the outer portion 35 where the pinch portion 26x is located, as shown in fig. 16, for example. The protrusion 36 may be provided in a portion of the outer portion 35 other than the pinch portion 26 x. Further, a plurality of projections 36 may be provided on the outer portion 35.
Preferably, the projections 36 are provided on the sides of the outer portion 35 rather than at the corners. This can prevent the projection 36 from interfering with the operation of removing the lid 50 of the lidded container 10 from the container 20.
Next, the hinge portion 42 of the coupling portion 40 will be described in detail with reference to fig. 16 to 18.
In the example shown in fig. 16 and 17, the pair of hinge portions 42 are located at the corners of the inner portion 30, respectively. Specifically, one hinge portion 42 is located at a first corner 26e between the first side 26a and the second side 26b, and the other hinge portion 42 is located at a second corner 26f between the second side 26b and the third side 26 c. The pair of hinge portions 42 is provided such that the rotation axis a extends parallel to the second side 26 b. As shown in fig. 16 and 17, the rotation axis a is a straight line passing through a portion of one hinge portion 42 located closest to the center point C of the opening portion 28 and a portion of the other hinge portion 42 located closest to the center point C of the opening portion 28.
As shown in fig. 16 and 17, a part of the inner portion 30 of the flange portion 26 protrudes to the outside of the rotation axis a. In the example shown in fig. 16 and 17, the portion of the inner section 30 including the second edge 26b is located outside the rotation axis a. An outer edge of a portion (hereinafter, also referred to as an engaging portion 31) of the inner portion 30 that protrudes outward from the rotation axis a abuts against a lower surface 50b of the lid 50 when the lid 50 and the outer portion 35 rotate about the rotation axis a, and presses the lower surface 50b of the lid 50. As a result, a frictional force is generated between the outer edge of the locking portion 31 of the inner portion 30 and the lower surface 50b of the cover 50. By utilizing this frictional force, the user can fix the cover 50 and the outer portion 35 to the inner portion 30 in a state where the cover 50 and the outer portion 35 are rotated within a predetermined angle range around the rotation axis a. Therefore, the opening 28 of the opening container 21 can be maintained in an open state.
In fig. 17, reference numeral W5 denotes the dimension of the portion of the inside part 30 that protrudes to the outside of the rotation axis a in the direction perpendicular to the rotation axis a. The dimension W5 is, for example, 3mm or more, and more preferably 5mm or more. By setting the dimension W5 to 3mm or more, sufficient frictional force can be generated between the outer edge of the locking portion 31 of the inner portion 30 and the lower surface 50b of the lid 50, and the lid 50 and the outer portion 35 can be fixed to the inner portion 30. The dimension W5 is, for example, 10mm or less, and more preferably 7mm or less. By setting the dimension W5 to 10mm or less, excessive friction generated between the outer edge of the locking portion 31 of the inner portion 30 and the lower surface 50b of the cover 50 can be suppressed. This can prevent the lid 50 from being peeled off from the outer portion 35 and the lid 50 and the outer portion 35 from being rotated with difficulty.
Preferably, as shown in fig. 17, the first joining portion 30A is not provided with the locking portion 31 of the inner portion 30. In other words, the upper surface of the locking portion 31 of the inner portion 30 is not joined to the lower surface 50b of the cover 50. The reason for adopting such joining will be described below.
It is assumed that the entire upper surface of the inner side portion 30 is engaged with the cover 50. In this case, in the state of the capped container 10, if an upward force is applied to the above-described grip portion 26x of the flange portion 26, a force directed away from the upper surface 30a of the inner portion 30 is applied to a portion of the cap 50 located on the side of the grip portion 26x with respect to the rotation axis a. On the other hand, a force toward the upper surface 30a of the inner portion 30 is applied to a portion of the cover 50 located on the opposite side of the rotation axis a from the pinch portion 26 x. Therefore, the portion of the cover 50 located on the opposite side of the rotation axis a from the pinch portion 26x cannot be peeled off from the upper surface 30a of the inner portion 30 by applying an upward force to the pinch portion 26 x. In this case, for example, it is necessary to peel off a portion of the lid 50 located on the opposite side of the rotation axis a from the upper surface 30a of the inner portion 30 at the edge or corner of the flange portion 26 located on the opposite side of the pinch portion 26 x.
In contrast, in the present embodiment, the upper surface of the locking portion 31 of the inner portion 30 is not joined to the lower surface 50b of the cover 50. Therefore, by applying an upward force to the pinch portion 26x, the cover 50 can be peeled off from the upper surface 30a of the inner portion 30. This makes it possible to easily open the lidded container 10.
In fig. 16, reference numeral S1 denotes a dimension in the hinge section 42 in the direction along the outer edge of the inner side portion 30, and reference numeral S2 denotes a dimension in the hinge section 42 in the direction perpendicular to the direction along the outer edge of the inner side portion 30. The dimension S1 is, for example, 1mm or more, and more preferably 3mm or more. The dimension S2 is, for example, 1mm or more, and more preferably 2mm or more. By setting the dimension S to 1mm or more and setting the dimension S2 to 1mm or more, it is possible to suppress breakage of the hinge portion 42 when the outer portion 35 rotates about the rotation axis a with respect to the inner portion 30. The dimension S2 is, for example, 5mm or less, and more preferably 4mm or less. By setting the dimension S2 to 5mm or less, the outer edge of the locking portion 31 of the inner portion 30 can be appropriately brought into contact with the lower surface 50b of the lid 50.
Fig. 18 is a sectional view of a portion of the lidded container 10 including the hinge portion 42. Preferably, an inner end portion (hereinafter, also referred to as an inner end) 42a of the pair of end portions of the hinge portion 42 is connected to the inner portion 30 at a position close to the lower surface 30 b. Further, it is preferable that an outer end portion (hereinafter, also referred to as an outer end) 42b of the pair of end portions of the hinge portion 42 is connected to a position of the outer portion 35 close to the upper surface 35 a. For example, as shown in fig. 18, the inner end 42a of the hinge portion 42 is connected to the lower surface 30b of the inner portion 30, and the outer end 42b of the hinge portion 42 is connected to a position near the upper surface 35a in the inner edge of the outer portion 35. In addition, "connected to a position near the lower surface" means that the distance from the connecting portion to the lower surface is smaller than the distance from the connecting portion to the upper surface. Likewise, "connected to a location near the upper surface" means that the distance from the connection site to the upper surface is less than the distance from the connection site to the lower surface.
The thickness T4 of the hinge portion 42 is, for example, 0.1mm or more, and more preferably 0.3mm or more. The thickness T4 of the hinge portion 42 is, for example, 1mm or less, and more preferably 0.8mm or less.
In this modification, as in the case of the above-described embodiment, the container 20 can also be manufactured by injection molding. The lid 50 can be welded to the flange portion 26 of the container 20 using the holder 70, the first hot plate 75, and the second hot plate 76. During the welding operation, the joint 41 of the connecting portion 40 is bent and left between the inner portion 30 and the outer portion 35. Alternatively, it is also conceivable that the joint 41 is broken from the inner portion 30 or the outer portion 35 during the welding operation. On the other hand, the hinge portion 42 of the connecting portion 40 is configured not to be broken during the welding operation.
Next, an example of a method of unsealing the lidded container 10 of this modification will be described.
First, as in the case of the above-described embodiment, an upward force is applied to a part of the grip portion 26x of the flange portion 26 of the container 20. Thereby, the lower surface 50b of the cover 50 is peeled from the upper surface 30a of the inner portion 30 around the pinch portion 26x, and the joint portion 41 of the coupling portion 40 is broken. Next, as shown in fig. 19, the force is continuously applied to the grip portion 26x so that the cover 50 and the outer portion 35 rotate about the rotation axis a. Thereby, the lower surface 50b of the cover 50 is peeled off from the upper surface 30a of the inner portion 30. Then, the remaining joint portion 41 is broken. After all the coupling portions 41 are broken, both the portion of the outer portion 35 located outside the rotation axis a and the portion located inside the rotation axis a can rotate about the rotation axis a.
As the cap 50 and the outer portion 35 rotate, the pressing force of the outer edge of the locking portion 31 of the inner portion 30 against the cap 50 increases, and the frictional force generated between the outer edge of the locking portion 31 and the lower surface 50b of the cap 50 also increases. If the frictional force is greater than the force by which the cover 50 and the outer side portion 35 want to be displaced opposite to the direction Fa shown in fig. 19 due to their own weight, the cover 50 and the outer side portion 35 are stationary relative to the inner side portion 30 even in the case where the user does not apply a force to the cover 50 and the outer side portion 35. Therefore, the opening 28 of the opening container 21 can be maintained in an open state.
In the present modification, the material and thickness of the cover 50 are preferably selected so that the cover 50 can be elastically deformed when the lower surface 50b of the cover 50 is pressed by the outer edge of the locking portion 31 of the inner portion 30.
The effects of the present modification are summarized below. The container 20 of the present modification includes a pair of hinge portions 42 connecting the inner portion 30 and the outer portion 35. Therefore, after the lid 50 is removed from the container 20, the lid 50 and the outer portion 35 joined to the lid 50 can be rotated about the rotation axis a with respect to the inner portion 30 of the opening container 21. Therefore, the user can easily cover the opening 28 of the opening container 21 with the lid 50 without positioning the lid 50 with respect to the opening container 21. The inner portion 30 of the container 20 includes a locking portion 31 that protrudes outward from the rotation axis a. The outer edge of the locking portion 31 can abut against the lower surface 50b of the cover 50 and can press the lower surface 50b of the cover 50 when the cover 50 and the outer portion 35 rotate about the rotation axis a. Therefore, a frictional force is generated between the outer edge of the locking portion 31 of the inner portion 30 and the lower surface 50b of the cover 50. By utilizing this frictional force, the user can fix the cover 50 and the outer portion 35 to the inner portion 30 in a state where the cover 50 and the outer portion 35 are rotated within a predetermined angular range around the rotation axis a. Therefore, the opening 28 of the opening container 21 can be maintained in an open state.
Further, a projection 36 projecting toward the inner portion 30 is provided on the outer portion 35 of the container 20 of the present modification. Therefore, the outer portion 35 can be firmly fixed to the inner portion 30 in a state where the container 21 is unsealed after the joint portion 41 of the connecting portion 40 is broken. This can provide the unsealing container 21 with excellent resealability.
Several further modifications of the lidded container 10 and the container 20 of this modification will be described below.
The positional relationship in the vertical direction between the inner portion 30 and the outer portion 35 of the container 20 in a state where the lid 50 is not engaged is not particularly limited. For example, as shown in fig. 20, in the container 20 in a state where the lid 50 is not joined, the upper surface 35a of the outer portion 35 of the flange portion 26 and the upper surface 30a of the inner portion 30 may be located on the same plane.
Fig. 16 and 17 show an example in which the outer portion 35 includes a protrusion 36 protruding toward the inner portion 30 side, but the present invention is not limited thereto. For example, as shown in fig. 21, the outer portion 35 may not include a protrusion protruding toward the inner portion 30.
Fig. 16 and 17 show an example in which the pair of hinge portions 42 connect the inner portion 30 and the outer portion 35 such that one side (specifically, the second side 26b) of the inner portion 30 is positioned outward of the rotation axis a. In the present modification, an example will be described in which the pair of hinge portions 42 connect the inner portion 30 and the outer portion 35 so that at least a part of one corner of the inner portion 30 is located outside the rotation axis a.
Fig. 22 is a plan view showing a container 20 according to this modification. In the example shown in fig. 22, the outer edge of the inner side portion 30 has a square outline including four sides (the first side 26a, the second side 26b, the third side 26c, and the fourth side 26d) having equal lengths.
As shown in fig. 22, the pair of hinge portions 42 connect the inner portion 30 and the outer portion 35 so that a part of the second corner portion 26f of the inner portion 30 is positioned outside the rotation axis a. Specifically, the pair of hinge portions 42 are both located at the second corner portion 26 f. A predetermined gap is provided between one hinge portion 42 and the other hinge portion 42. In this case, the portions of the inner portions 30 that protrude to the outside of the rotational axes a passing through the pair of hinge portions 42 function as the locking portions 31 that abut against the lower surface 50b of the lid 50 and press the lower surface 50b of the lid 50.
Fig. 23 is a plan view showing the lidded container 10 obtained by engaging the lid 50 with the container 20 shown in fig. 22. In the present modification, the lid 50 is peeled off from the upper surface 30a of the inner portion 30 by applying an upward force to a part of the outer portion 35 on the side of the fourth corner 26h opposed to the second corner 26f provided with the pair of hinge portions 42. Preferably, the portion of the outer portion 35 corresponding to the fourth corner 26h is provided with a tab 26x protruding outward.
As in the case of the example shown in fig. 16 and 17, in the present modification as well, it is preferable that the locking portion 31 of the inner portion 30 is not engaged with the lid 50 as shown in fig. 23. Therefore, by applying an upward force to the pinch portion 26x, the cover 50 can be peeled off from the upper surface 30a of the inner portion 30. This makes it possible to easily open the lidded container 10.
When the pair of hinge portions 42 are located at one corner portion, for example, the second corner portion 26f, as shown in fig. 22 and 23, the inner edge of the flange portion 26 in the second corner portion 26f may be disposed closer to the center point C than the other corner portions. This can enlarge the area of the inner portion 30 located inward of the rotation axis a. Therefore, even in the case where the inside part 30 is not engaged with the cover 50 at a position outside the rotation axis a, a region for engaging the inside part 30 with the cover 50 at the second corner 26f can be appropriately secured inside the rotation axis a.
In the present modification, when the lidded container 10 is opened, the lid 50 is peeled from the fourth corner 26h in the direction toward the center point C as indicated by an arrow P1 in fig. 23. The force required for peeling the lid 50 in the direction P1 per unit length is proportional to the length of the portion of the first engagement portion 30A that intersects a straight line extending in the direction P2 perpendicular to the direction P1 (hereinafter, also referred to as the peeling length).
According to the present modification, the engagement portion 31 is provided at the corner of the inner portion 30, so that the pinching portion 26x can be provided at the corner of the flange portion 26. Therefore, compared to the case where the tab portion 26x is provided on the side of the flange portion 26, the peeling length at the time of starting the operation of unsealing the lidded container 10 can be reduced, and therefore the force required at the time of starting the operation of unsealing can be reduced. This can improve the unsealing ability of the lidded container 10.
(modification of the shape of the Container)
Fig. 16 and 17 show an example in which the flange portion 26 of the container 20 has a rectangular outline. In the present modification, an example in which the flange portion 26 of the container 20 has a circular contour will be described.
Fig. 24 is a plan view showing a container 20 of the present modification. In the example shown in fig. 24, both the inner edge of the inner portion 30 defining the opening portion 28 and the outer edge of the inner portion 30 have a rounded or oval contour. The center C1 of the outer edge of the inner portion 30 is eccentric toward the pair of hinge portions 42 with respect to the center C of the opening 28. In the present modification, the portions of the inner portions 30 that protrude to the outside of the rotation axes a passing through the pair of hinge portions 42 function as the locking portions 31 that abut against the lower surface 50b of the lid 50 and press the lower surface 50b of the lid 50.
Fig. 25 is a plan view showing the lidded container 10 obtained by engaging the lid 50 with the container 20 shown in fig. 24. As in the case of the above-described embodiment, in the present modification, as shown in fig. 25, it is also preferable that the locking portion 31 of the inner portion 30 is not joined to the lid 50. Therefore, by applying an upward force to the pinch portion 26x, the cover 50 can be peeled off from the upper surface 30a of the inner portion 30. This makes it possible to easily open the lidded container 10.
Further, although several modifications of the above-described embodiment have been described, it is needless to say that several modifications may be appropriately combined and used.
Description of the reference symbols
10: a lidded container; 20: a container; 21: unsealing the container; 22: a bottom surface; 24: a side surface; 26: a flange portion; 30: an inner portion; 30 a: an upper surface; 30 b: a lower surface; 30A: a first engaging portion; 31: a card-holding section; 35: an outer portion; 35 a: an upper surface; 35 b: a lower surface; 35 c: an inclined surface; 35A: a second engaging portion; 36: a protrusion; 37: a reinforcing portion; 38: a wall portion; 40: a connecting portion; 41: a bonding section; 42: a hinge portion; 50: a cover; c: a center point; a: an axis of rotation.

Claims (16)

1. A container having an opening formed therein, wherein,
the container has:
a bottom surface;
a side surface erected from the bottom surface; and
a flange portion connected to an upper portion of the side surface,
the flange portion includes:
an inner portion continuously provided in connection with the side surface over an entire circumference;
an outer portion located outside the inner portion; and
a coupling portion provided between the inner portion and the outer portion to couple the inner portion and the outer portion together,
the upper surface of the outer portion is located below the lower surface of the inner portion,
a projection projecting toward the inner side portion is provided on the outer side portion,
the coupling portions are intermittently formed at a plurality of places along the inner portion over the entire circumference.
2. The container of claim 1, wherein,
the protrusion protrudes from the outer side end of the inner portion toward the inner side end by 0.1mm to 1.0 mm.
3. The container of claim 1, wherein,
the container is made of thermoplastic resin.
4. The container according to any one of claims 1 to 3,
the thickness of the coupling portion is smaller than the thickness of the inner portion and the thickness of the outer portion.
5. The container according to any one of claims 1 to 3,
a part of the connecting portion is continuously formed along the inner portion to function as a hinge portion.
6. The container according to any one of claims 1 to 3,
the coupling portion includes a pair of hinge portions that couple the inner portion and the outer portion together so as to define a rotation axis for rotating the outer portion with respect to the inner portion,
a part of the inner portion protrudes to a position outside the rotation axis.
7. The container of claim 6, wherein,
the inner portion has a dimension of a portion protruding to the outside of the rotation axis in a direction perpendicular to the rotation axis of 3mm or more.
8. The container of claim 6, wherein,
the inner portion has a dimension of 10mm or less in a direction perpendicular to the rotation axis, the portion protruding to an outer side of the rotation axis.
9. The container of claim 6, wherein,
the rotation axis is a straight line passing through a portion of one of the hinge portions located closest to a center point of the opening portion and a portion of the other hinge portion located closest to the center point of the opening portion.
10. The container of claim 6, wherein,
the inner portion has a polygonal shape including a plurality of sides and a plurality of corners,
the pair of hinge portions of the connecting portion connect the inner portion and the outer portion such that one side of the inner portion is located outward of the rotation axis.
11. The container of claim 6, wherein,
the inner portion has a polygonal shape including a plurality of sides and a plurality of corners,
the pair of hinge portions of the coupling portion couples the inner portion and the outer portion such that at least a part of one corner of the inner portion is located outside the rotation axis.
12. A lidded container having:
a container having an opening formed therein; and
a lid that is engaged with the container so as to cover the opening portion of the container,
the container has a bottom surface, a side surface standing from the bottom surface, and a flange portion connected to an upper portion of the side surface,
the flange portion includes an inner portion continuously provided to be connected to the side surface over an entire circumference and an outer portion located outside the inner portion,
the cover is continuously engaged with the upper surface of the inner portion over the entire circumference and at least partially engaged with the upper surface of the outer portion,
the upper surface of the inner portion and at least a part of the upper surface of the outer portion are located on the same plane, the lower surface of the outer portion is located below the lower surface of the inner portion,
the outer portion is provided with a projection projecting inward of an outer end of the inner portion.
13. The lidded container of claim 12 wherein,
the flange portion further includes a joining portion joining the inner portion and the outer portion,
the coupling portion includes a pair of hinge portions that couple the inner portion and the outer portion together so as to define a rotation axis for rotating the outer portion with respect to the inner portion,
a part of the inner portion protrudes to a position outside the rotation axis.
14. The lidded container of claim 13 wherein,
a portion of the upper surface of the inner portion that protrudes to the outside of the rotation axis does not engage with the cover.
15. The capped container of any one of claims 12 to 14,
the engagement force between the cover and the upper surface of the outer portion is greater than the engagement force between the cover and the inner portion.
16. A method for manufacturing a container with a lid, comprising the steps of:
preparing the container of claim 1;
placing a lid on an upper surface of an inner portion of the container; and
in a state where the lower surface of the outer portion of the container is held, the upper surface of the inner portion is pressed downward by a hot plate through the lid, whereby the upper surface of the outer portion and the upper surface of the inner portion are positioned on the same plane, and the lid is welded to the upper surface of the inner portion and the upper surface of the outer portion.
CN201680063518.7A 2015-10-29 2016-10-28 Container, container with lid, and method for manufacturing container with lid Active CN108349639B (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2015-213221 2015-10-29
JP2015213221A JP6213544B2 (en) 2015-10-29 2015-10-29 Container with lid, container and method for producing container
JP2016183355A JP6902217B2 (en) 2016-09-20 2016-09-20 container
JP2016-183355 2016-09-20
PCT/JP2016/082097 WO2017073742A1 (en) 2015-10-29 2016-10-28 Container, container with lid, and method for manufacturing container-with-lid

Publications (2)

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CN108349639A CN108349639A (en) 2018-07-31
CN108349639B true CN108349639B (en) 2020-01-14

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WO (1) WO2017073742A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0513888A1 (en) * 1991-05-13 1992-11-19 AUTOPAC S.r.l. Tray of relatively yieldable material such as thin cardboard or plastics material, in particular for packaging food products
CN201077622Y (en) * 2007-09-29 2008-06-25 上海超智食品贸易有限公司 Double-deck instant noodles container
CN101544287A (en) * 2008-03-25 2009-09-30 大日本印刷株式会社 Preformed product and container
JP5802055B2 (en) * 2011-05-24 2015-10-28 株式会社エフピコ Packaging container lid and container body, and packaging container

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002029576A (en) * 2001-08-09 2002-01-29 Sumi Kk Synthetic resin engaging container

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0513888A1 (en) * 1991-05-13 1992-11-19 AUTOPAC S.r.l. Tray of relatively yieldable material such as thin cardboard or plastics material, in particular for packaging food products
CN201077622Y (en) * 2007-09-29 2008-06-25 上海超智食品贸易有限公司 Double-deck instant noodles container
CN101544287A (en) * 2008-03-25 2009-09-30 大日本印刷株式会社 Preformed product and container
JP5802055B2 (en) * 2011-05-24 2015-10-28 株式会社エフピコ Packaging container lid and container body, and packaging container

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AU2016346678B2 (en) 2022-05-12
WO2017073742A1 (en) 2017-05-04
AU2016346678A1 (en) 2018-05-17
CN108349639A (en) 2018-07-31

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