JP2016159956A - Container with lid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container with a lid having sealability and re-sealability.SOLUTION: A container comprises: a bottom face; a side face erected from the bottom face so as to extend along an outer edge of the bottom face around the periphery; and a flange part provided continuously to an upper part of the side face. The flange part includes: an inside portion provided continuously to the side face around the periphery; an outside portion located outside the inside portion; and a connection portion provided between the inside portion and the outside portion and connecting the inside portion and the outside portion. The connection portion continuously extends along the inside portion around the periphery. A lid is continuously joined to at least one of a top face of the outside portion and a top face of the inside portion around the periphery, and is joined to the top face of the outside portion at least partially. The thickness of the connection portion is smaller than the thickness of the inside portion and the thickness of the outside portion. The top face of the inside portion and the top face of the outside portion are located on the same plane at least partially.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a lidded container including a container in which an opening is formed and a lid joined to the container so as to cover the opening of the container.

  In recent years, a lid that is joined to a container to cover an opening of a container that contains food, chemical products, etc., is configured to be able to stably cover the opening of the container even after the lid is once removed from the container. Have been proposed. For example, Patent Literature 1 discloses a container with a lid that includes a tray and a container having a cover frame configured to be separable from the tray, and a cover foil welded to the upper surface of the tray and the upper surface of the cover frame. . The cover-equipped container is configured such that when the cover foil is removed from the tray, the cover frame is also removed from the tray together with the cover foil. The cover frame is configured to be snapped to the tray. For this reason, the cover foil removed from the tray is put on the tray again, and the cover frame welded to the cover foil is fixed to the tray by snapping, thereby stably covering the opening of the container again. it can.

Special table 2014-502588 gazette

  In the above-mentioned Patent Document 1, the cover frame of the container before the cover foil is welded is connected to the tray by a plastic film so that the upper surface of the cover frame is positioned above the upper surface of the tray. Then, during the process of welding the cover foil to the upper surface of the cover frame, the plastic film is broken and the cover frame is moved downward to a position where the cover frame is snapped to the tray. Thereafter, the cover foil is also thermally welded to the upper surface of the tray. Thus, in patent document 1, the process of welding a cover foil on the upper surface of a cover frame is started in the state in which a level | step difference exists between a cover frame and a tray. For this reason, the welding between the cover foil and the upper surface of the cover frame is likely to be uneven, and as a result, it is considered that the welding force between the cover foil and the upper surface of the cover frame tends to vary. In addition, since there is a step between the cover frame of the container and the tray, it is conceivable that the cover frame is destroyed before the cover foil is welded to the container.

  An object of this invention is to provide the container with a lid which can solve such a subject effectively.

  1st this invention is equipped with the container in which the opening part was formed, and the lid | cover joined to the said container so that the said opening part of the said container may be covered, The said container follows a bottom face and the outer edge of the said bottom face And a flange portion connected to the upper portion of the side surface, the flange portion being an inner side continuously connected to the side surface. A connecting portion that is provided between the inner portion and the outer portion, and that connects the inner portion and the outer portion. Extends continuously along the inner portion over one circumference, the lid is at least partially joined to the upper surface of the outer portion, and the thickness of the connecting portion is the thickness of the inner portion and The thickness of the outer part Is small, the upper surface of the inner portion, an upper surface of the outer portion is located at least partially coplanar, a container with a lid.

In the container with a lid according to the first aspect of the present invention, the outer portion may continuously extend along the connection portion over a circumference. In this case, the lid is continuously joined over at least one of the upper surface of the outer portion and the upper surface of the inner portion, and at least partially joined to the upper surface of the outer portion. Yes.
Alternatively, the outer portion may extend intermittently along the connecting portion over a circumference. In this case, the lid is continuously joined to the upper surface of the inner portion over the entire circumference, and at least partially joined to the upper surface of the outer portion.

  2nd this invention is equipped with the container in which the opening part was formed, and the lid | cover joined to the said container so that the said opening part of the said container might be covered, The said container is along the outer edge of the said bottom face And a flange portion connected to the upper portion of the side surface, the flange portion being an inner side continuously connected to the side surface. A connecting portion that is provided between the inner portion and the outer portion, and that connects the inner portion and the outer portion. Extends intermittently along the inner portion over a circumference, and the lid is continuously joined to the upper surface of the inner portion over the circumference and at least partially joined to the upper surface of the outer portion. And within the above And the upper surface portion, said the upper surface of the outer portion is located at least partially coplanar, a container with a lid.

  In the container with a lid according to the present invention, the outer portion is located at a position lower than the connecting portion so as to partially overlap the inner portion when the container with the lid is viewed along the normal direction of the lid. You may have the protrusion part which protrudes inside. In this case, the end portion on the connecting portion side of the end portion of the inner portion may include an inclined surface that inclines downward as it goes inward.

  In the lidded container according to the present invention, the outer portion may include a reinforcing portion positioned below the lower surface of the inner portion.

  In the container with a lid according to the present invention, the outer portion may have a wall portion located above the upper surface of the inner portion and located outside the lid.

  In the container with a lid according to the present invention, a bonding force between the lid and the upper surface of the outer portion may be larger than a bonding force between the lid and the inner portion.

  The present invention is a container in which an opening is formed, and includes a bottom surface, a side surface erected from the bottom surface so as to spread around the outer edge of the bottom surface, and a flange portion connected to the upper portion of the side surface. The flange portion includes an inner portion continuously connected to the side surface over a circumference, an outer portion positioned outside the inner portion, and between the inner portion and the outer portion. A container comprising: a connecting portion connecting the inner portion and the outer portion, wherein the upper surface of the inner portion and the upper surface of the outer portion are at least partially located on the same plane It is.

  In the container according to the present invention, the connecting portion may extend continuously along the inner portion over one round, and the outer portion may extend continuously along the connecting portion over one round.

  In the container according to the present invention, the connecting portion may extend intermittently along the inner portion over a round.

  In the container according to 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 flange portion of the container according to the present invention, the inner part and the outer part are connected by a connecting part provided between the inner part and the outer part. The upper surface of the inner portion of the flange portion and the upper surface of the outer portion are at least partially located on the same plane. Therefore, the lid can be stably joined to the upper surface of the flange portion of the container, and this can suppress variation in the joining force between the flange portion of the container and the lid. The lid is joined to the upper surface of at least the outer portion of the flange portion. Thereby, the container can be resealed by covering the container after the cover is removed by breaking the connecting portion of the container, and then covering the container again. Therefore, it is possible to provide a container with a lid having excellent initial sealing properties and resealability.

FIG. 1 is an exploded view of members constituting a lidded container in an embodiment of the present invention. FIG. 2 is a longitudinal sectional view showing a lidded container in an embodiment of the present invention. FIG. 3 is an enlarged view showing a flange portion and a lid of the container shown in FIG. FIG. 4 is a diagram illustrating a state in which the lid is removed from the container. FIG. 5 is a diagram showing a state where the opening of the opening container is covered again by the lid. FIG. 6 is an exploded view of members constituting a lidded container in a modification of the embodiment of the present invention. FIG. 7 is a view showing a modification of the container in the embodiment of the present invention. FIG. 8 is a view showing a modification of the container in the embodiment of the present invention. FIG. 9 is a view showing a modified example of the container in the embodiment of the present invention. FIG. 10 is a view showing a modified example of the container in the embodiment of the present invention. FIG. 11 is a view showing a modification of the container in the embodiment of the present invention. FIG. 12 is a view showing a modification of the container in the embodiment of the present invention. FIG. 13 is a view showing a modification of the container in the embodiment of the present invention. FIG. 14 is a view showing a modification of the container in the embodiment of the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. First, with reference to FIG. 1 and FIG. 2, the whole container 10 with a lid | cover in this Embodiment is demonstrated.

(Container with lid)
FIG. 1 is an exploded view of members constituting the lidded container 10, and FIG. 2 is a longitudinal sectional view showing the lidded container 10. The container 10 with a lid includes a container 20 in which an opening 28 is formed, 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. “Welding” means attaching the lid 50 to the container 20 by at least partially melting at least one of the container 20 and the lid 50. The term “adhesion” means that the lid 50 is attached to the container 20 by using a component such as an adhesive that is separate from the container 20 and the lid 50.

  Further, in this specification, “a container with a lid” means a state where the lid 50 has not been removed yet after the lid 50 is joined to the container 20 unless otherwise specified. In other words, the lidded container 10 includes the container 20 in a state where a connecting portion 40 described later is not broken and the lid 50 joined to the container 20. In the following description, the container 20 after the lid 50 is removed by breaking the connecting portion 40 may be referred to as an opening container 21.

(container)
Next, the container 20 will be described. As shown in FIGS. 1 and 2, the container 20 is connected to the bottom surface 22, a side surface 24 standing from the bottom surface 22 so as to spread around the outer edge 22 e of the bottom surface 22, and an upper portion of the side surface 24. And a flange portion 26. The lid 50 described above is joined to the flange portion 26 of the container 20. FIGS. 1 and 2 show an example in which the flange portion 26 is connected to the upper edge of the side surface 24 and extends in the horizontal direction toward the outside. In this specification, terms such as “side surface”, “upper portion”, “upper edge” and “upper surface”, “lower surface”, and “horizontal direction” described later are used so that the bottom surface 22 of the container 20 is positioned below. The position and direction of the container 10 with a lid | cover, the container 20, the lid | cover 50, and those components are represented on the basis of the state in which the container 10 with a lid | cover and the container 20 are mounted.

  1 and 2 show an example in which the bottom surface 22 and the side surface 24 of the container 20 are configured so that the opening 28 has a circular outline in the horizontal direction. However, the shape of the container 20 is not particularly limited as long as the desired contents can be accommodated in the container 20. For example, the opening 28 may have a rectangular or polygonal outline in the horizontal direction. Further, the contour of the bottom surface 22 and the contours of the flange portion 26 and the lid 50 may be similar or may not be similar.

  The contents stored in the container 20 are not particularly limited, but examples of the contents include snacks such as nuts, dried fruits, prepared dishes, and sweets. As described later, the lidded container 10 according to the present embodiment is characterized by being excellent in initial sealing performance. Further, as will be described later, the lidded container 10 according to the present embodiment utilizes the lid 50 by re-covering the opening container 21 after the lid 50 has been removed by breaking the connecting portion 40. Thus, the opening 28 of the opening container 21 can be covered, that is, it has resealability. “Initial sealability” refers to the gap between the flange portion 26 of the container 20 and the lid 50 in the container 10 with the lid, that is, in a state where the lid 50 has not been removed yet after the lid 50 is joined to the container 20. Means close adhesion.

(Flange part)
Hereinafter, the flange portion 26 of the container 20 will be described in detail with reference to FIGS. 1 to 5. FIG. 3 is an enlarged view of the flange portion 26 and the lid 50 of the container 20 shown in FIG. FIG. 4 is a diagram illustrating a state in which the lid 50 is removed from the container 20 and the container 20 becomes the opening container 21. FIG. 5 is a view showing a state in which the opening 28 of the opening container 21 is covered with the lid 50.

  As shown in FIG. 1, the flange portion 26 includes an inner portion 30 continuously connected to the side surface 24 over one circumference, an outer portion 35 located outside the inner portion 30, an inner portion 30 and an outer portion 35. And a connecting portion 40 that connects the inner portion 30 and the outer portion 35 to each other. In the present specification, “outside” means a side far from the opening 28 of the container 20 in the horizontal direction. Further, “inside” means a side near the opening 28 of the container 20 in the horizontal direction.

  As shown in FIG. 4, in the container 10 with a lid according to the present embodiment, when the lid 50 is removed from the container 20 by breaking the connecting portion 40 of the container 20, the outer portion 35 and the container 20 (opening container 21). ). Therefore, in the state of the container 10 with the lid, the lid 50 is at least partially joined to the upper surface 35 a of the outer portion 35.

  As shown in FIG. 1, the connecting portion 40 continuously extends along the inner portion 30 over one circumference. The outer portion 35 also extends continuously along the connecting portion 40 over one circumference. The lower surface 50b of the lid 50 is continuously joined to at least one of the upper surface 35a of the outer portion 35 and the upper surface 30a of the inner portion 30 over one circumference. By configuring the flange portion 26 and the lid 50 of the container 20 in this manner, the opening portion 28 of the container 20 can be sealed without a gap. The lower surface 50 b of the lid 50 may be further joined to the upper surface 40 a of the connecting portion 40 in addition to the upper surface 35 a of the outer portion 35 and / or the upper surface 30 a of the inner portion 30.

  In FIG. 1, the example in which the outer portion 35 continuously extends along the connecting portion 40 over one round is shown, but the present invention is not limited to this. Although not shown, as long as the outer portion 35 can be maintained at least partially joined to the lid 50 when the lid 50 is removed from the container 20, the outer portion 35 extends along the connecting portion 40 over the entire circumference. And may extend intermittently. In this case, the lower surface 50 b of the lid 50 is continuously joined to the upper surface 30 a of the inner portion 30 over the entire circumference, and at least partially joined to the upper surface 35 a of the outer portion 35. In this case, the opening 28 of the container 20 can be sealed without a gap by joining between the lower surface 50 b of the lid 50 and the upper surface 30 a of the inner portion 30. Further, by joining the lower surface 50b of the lid 50 and the upper surface 35a of the outer portion 35, when the lid 50 is removed from the container 20, the outer portion 35 is maintained at least partially joined to the lid 50. it can.

  Hereinafter, in the present embodiment, a case where the lower surface 50b of the lid 50 is joined not only to the upper surface 35a of the outer portion 35 but also to members other than the upper surface 35a of the outer portion 35 will be considered. The joint between the lid 50 and the flange portion 26 must be configured so that the lid 50 can be removed from the container 20 while maintaining the outer portion 35 at least partially joined to the lid 50. is there. On the other hand, the bonding force between the upper surface 35a of the outer portion 35 of the container 20 and the lid 50 is a bonding force between the other portion of the container 20 and the lid 50, for example, the upper surface 30a of the inner portion 30 and the lid 50. When the force is applied to the end portion 26e of the flange portion 26 of the container 20 in order to remove the lid 50 from the container 20, the lid 50 has an upper surface 30a of the inner portion 30 or an upper surface 40a of the connecting portion 40. It is conceivable that the lid 50 is peeled off from the upper surface 35a of the outer portion 35 before being peeled off. Considering this point, preferably, the bonding force between the lid 50 and the upper surface 35a of the outer portion 35 is the bonding force between the lid 50 and the upper surface 30a of the inner portion 30 or / and the lid 50 and the connecting portion 40. The lidded container 10 is configured to be larger than the bonding force with the upper surface 40a. This can prevent the lid 50 from being peeled off from the upper surface 35 a of the outer portion 35 when the lid 50 is removed from the container 20.

The bonding force between the lid 50 and the upper surface 30a of the inner portion 30 of the flange portion 26, the upper surface 35a of the outer portion 35 and the upper surface 40a of the connecting portion 40 is, for example, a Tensilon tensile tester (for example, manufactured by Orientec Co., Ltd.). , RTC-1310A). Hereinafter, an example of a procedure for measuring the bonding force will be described.
First, the sample in which the lid 50 and the flange portion 26 are joined is cut into a predetermined width, for example, 15 mm. Next, a part of the lid 50 is peeled off from the flange part 26, and a part of the lid 50 is sandwiched by one of the tensilon gripping jigs, and the flange part 26 is sandwiched by the other gripping jigs. Then, it is pulled at a pulling speed of 300 mm / min so that an angle formed by a part of the lid 50 and the flange portion 26 is 180 °. The maximum value of the load measured when the other part of the lid 50 is peeled from each part of the flange portion 26 is defined as a joining force between the lid 50 and each part of the flange part 26.
In addition, when the part which the lid | cover 50 and the flange part 26 have not joined is previously contained in a sample, you may abbreviate | omit the operation | work which partially peels the lid | cover 50 and the flange part 26 before measuring a load. .
When the bonding force is calculated using the above measurement method, the bonding force between the lid 50 and the upper surface 35a of the outer portion 35 is preferably greater than 20N, more preferably greater than 30N, The joining force between the upper surface 30a of the inner portion 30 and / or the joining force between the lid 50 and the upper surface 40a of the connecting portion 40 is preferably 20N or less, and more preferably 15N or less.

  The bonding force between the lid 50 and the upper surface 35a of the outer portion 35 is the bonding force between the lid 50 and the upper surface 30a of the inner portion 30 or / and the bonding force between the lid 50 and the upper surface 40a of the connecting portion 40. There are no particular limitations on the specific configuration and method for making the size larger. For example, the area and width of the portion of the upper surface 35a of the outer portion 35 joined to the lid 50 may be the area of the portion of the upper surface 30a of the inner portion 30 and / or the portion of the upper surface 40a of the connecting portion 40 joined to the lid 50, It can be considered to be larger than the width. When the lid 50 is joined to the flange portion 26 by welding caused by heating, the temperature at which the lid 50 is welded to the upper surface 35a of the outer portion 35 is set to the temperature at which the lid 50 is bonded to the upper surface 30a of the inner portion 30 or / and the connecting portion. You may make it higher than the temperature at the time of making it weld to the upper surface 40a of 40. FIG.

  As described above, the connecting portion 40 is a portion that is broken when the lid 50 is removed from the container 20. By the way, if the strength of the connecting portion 40 is too large, the force applied to the flange portion 26 to break the connecting portion 40 becomes excessively large, and as a result, the portions other than the connecting portion 40 in the container 20 are broken. It may be deformed. Therefore, the connection part 40 is comprised so that it can fracture | rupture with moderate force. For example, as shown in FIG. 3, the inner portion 30, the outer portion 35, and the connecting portion 40 are configured such that the thickness T3 of the connecting portion 40 is smaller than the thickness T1 of the inner portion 30 and the thickness T2 of the outer portion 35. Yes.

  In FIG. 3, the upper surface 30a, 35a, 40a and the lower surface 30b, 35b, 40b are parallel to each other in each of the inner portion 30, the outer portion 35, and the connecting portion 40. Therefore, the thicknesses T1, T2, T3 are An example is shown that is constant regardless of the position. However, the present invention is not limited to this, and it is conceivable that the thicknesses T1, T2, and T3 change depending on the position. For example, the upper surface 30a, 35a, 40a and the lower surface 30b, 35b, 40b may be non-parallel. Further, as will be described later, the outer portion 35 has the protrusion 36, the reinforcing portion 37 and the wall portion 38, or the inner portion 30 has the inclined surface 35c, so that the thicknesses T1, T2 and T3 are positioned. It is also possible to change accordingly. In such a case, “the thickness T3 of the connecting portion 40 is smaller than the thickness T1 of the inner portion 30 and the thickness T2 of the outer portion 35” means that “the average value of the thickness T3 is equal to the average value of the thickness T1 and the thickness T2. It may mean "smaller than average value". Alternatively, it may 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.” Or, “the thickness T3 of the connecting portion 40 is the thickness T1 of the inner portion 30 where the upper surface 30a and the lower surface 30b are parallel to each other, and the upper surface 35a and the lower surface 35b of the outer portion 35 are parallel to each other. It may mean "smaller than the thickness T2 of the part".

  The connecting portion 40 is easily broken as the thickness T3 decreases. Therefore, considering the ease of opening the lidded container 10, it is preferable that the thickness T3 of the connecting portion 40 is small. On the other hand, when the thickness T3 of the connecting portion 40 becomes too small, an impact applied to the container 20 in the container 20 in a state before the lid 50 is joined or in the process of joining the lid 50 to the container 20 or the like. It is conceivable that the connecting portion 40 breaks due to the above. Considering these points, preferably, the thickness T3 of the connecting portion 40 is set within a range of 0.2 to 0.8 mm. Preferably, the thickness T1 of the inner portion 30 and the thickness T2 of the outer portion 35 are set so that the thickness T3 of the connecting 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 part 30 and the thickness T2 of the outer part 35 are set within a range of 0.5 to 2.0 mm, for example.

  The width W3 (see FIG. 1) of the connecting portion 40 prevents the connecting portion 40 from breaking with an appropriate force, and prevents the outer portion 35 from coming into contact with the inner portion 30 when the connecting portion 40 breaks. It is preferable that it is set so that it is possible. For example, the width W3 of the connecting portion 40 is set within a range of 0.2 to 2.0 mm. Further, the width W2 of the outer portion 35 is 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 the lid 50 is joined to the outer portion 35 during the process of joining the lid 50 to the container 20. It is preferably set so that it can be easily positioned on the upper surface 35a. For example, it is preferable to set the width W2 of the outer portion 35 to 3 mm or more. As a result, it is possible to improve the manufacturing suitability when the lid 50 is joined to the outer portion 35 of the flange portion 26, and to make it easier to pick the outer portion 35 when removing the lid 50 from the container 20. For example, it is preferable to set the width W4 (see FIG. 3) to be joined to the outer portion 35 of the flange portion 26 of the lid 50 to 3 mm or more. Thereby, it is possible to easily ensure the initial sealing performance, and it is possible to make it difficult for the lid 50 to be separated from the outer portion 35 when the lid 50 is removed from the container 20.

  Next, the positions of the inner part 30, the outer part 35, and the connecting part 40 in the vertical direction will be described. In the present embodiment, at least portions of the upper surface 30a of the inner portion 30 and the upper surface 35a of the outer portion 35 that are in contact with the lower surface 50b of the lid 50 are located on the same plane. FIGS. 2 and 3 show examples in which the entire area of the upper surface 30a of the inner portion 30 and the entire area of the upper surface 35a of the outer portion 35 are located on the same horizontal plane. Therefore, when the lid 50 is placed on the upper surface 30a of the inner portion 30 and the upper surface 35a of the outer portion 35, and the lid 50 is joined to the flange portion 26 by welding using heat or ultrasonic waves, the lid 50 The lower surface 50b can be uniformly joined to the upper surface 35a of the outer portion 35. That is, the lid 50 can be stably joined to the flange portion 26 of the container 20. Thereby, it can suppress that the joining force between the flange part 26 of the container 20 and the lid | cover 50 varies according to a position or an individual | organism | solid, and can improve initial stage sealing performance.

  Note that “the upper surface 30a of the inner portion 30 and the upper surface 35a of the outer portion 35 are located on the same plane” means that the end portion on the connecting portion 40 side of the upper surface 30a of the inner portion 30 (hereinafter also referred to as the outer end portion). The difference between the position in the vertical direction of 30e and the position in the vertical direction of the end portion (hereinafter also referred to as the inner end portion) 35e on the connection portion 40 side of the upper surface 35a of the outer portion 35 is 0. It means 5 mm or less, more preferably 0.2 mm or less. Preferably, an angle formed between a portion of the upper surface 30a of the inner portion 30 that contacts the lower surface 50b of the lid 50 and a portion of the upper surface 35a of the outer portion 35 that contacts the lower surface 50b of the lid 50 is ± 30 degrees or less. Yes.

  As shown in FIG. 3, the upper surface 40 a of the connecting portion 40 may also be located on the same plane as the upper surface 30 a of the inner portion 30 and the upper surface 35 a of the outer portion 35. However, the present invention is not limited to this, and although not illustrated, the connecting portion 40 is provided so that the upper surface 40a of the connecting portion 40 is positioned below the upper surface 30a of the inner portion 30 and the upper surface 35a of the outer portion 35. May be.

  The material constituting the container 20 and the method of manufacturing the container 20 are selected such that the upper surface 35a of the outer portion 35 can be at least partially joined to the lower surface 50b of the lid 50. For example, the bottom surface 22, the side surface 24, and the flange portion 26 may be integrally formed by injection molding using resin. As resin which comprises the container 20, thermoplastic resins, such as a polypropylene, can be used, for example.

  By the way, in this Embodiment, as mentioned above, the connection part 40 is continuously extended along the inner part 30 over one round. Therefore, when the container 20 is formed by injection molding using a mold, it corresponds to the outer portion 35 from the portion corresponding to the inner portion 30 in the mold, compared to the case where the container 20 extends intermittently along the inner portion 30. It is possible to secure a wider flow path when the molten resin moves to the portion to be performed. For this reason, the container 20 can be manufactured efficiently.

(lid)
Next, the lid 50 joined to the container 20 will be described. The material making up the lid 50 is selected such that the lower surface 50b of the lid 50 can be joined to at least the upper surface 35a of the outer portion 35. For example, the lid 50 includes a base material layer and a sealant layer that constitutes the lower surface 50 b of the lid 50. The thickness of the lid 50 is, for example, in the range of 20 to 100 μm.

  As a material constituting the base material layer, polyester resins such as polyethylene terephthalate, polyamide resins such as nylon, polypropylene, and the like can be used. As a material constituting the sealant layer, polypropylene, a mixed resin of polypropylene and polyethylene, or the like can be used. When both the base material layer and the sealant layer include polypropylene, biaxially stretched polypropylene is used for the base material layer, and unstretched polypropylene is used for the sealant layer.

The above-mentioned “mixed resin of polypropylene and polyethylene” is a material having a relatively small bonding force, which is also referred to as an easy peel sealant. Therefore, when the sealant layer of the lid 50 includes a mixed resin of polypropylene and polyethylene, the lower surface 50b of the lid 50 is connected not only to the upper surface 35a of the outer portion 35 of the flange portion 26 of the container 20 but also to the upper surface 30a of the inner portion 30 and / or the connection. You may join also to the upper surface 40a of the part 40. FIG. Further, when the sealant layer of the lid 50 contains a mixed resin of polypropylene and polyethylene, the bonding force between the lid 50 and the flange portion 26 calculated by the method using the above-described tensile tester is 20 N or less. It is preferable that it is 15N or less.
On the other hand, when the sealant layer of the lid 50 is made of polypropylene alone, the bonding force is greater than when a mixed resin of polypropylene and polyethylene is used. Therefore, when the sealant layer of the lid 50 includes a single polypropylene, the lower surface 50b of the lid 50 is preferably not joined to the upper surface 30a of the inner portion 30 and the upper surface 40a of the connecting portion 40.

(Manufacturing method of container with lid)
Next, an example of the manufacturing method of the lidded container 10 will be described.

  First, the container 20 having the bottom surface 22, the side surface 24, and the flange portion 26 that are integrally formed is formed by injection molding using resin. Also, a lid 50 having a contour corresponding to the flange portion 26 of the container 20 is prepared. Next, the lid 50 is placed on the upper surface 30 a of the inner portion 30 and the upper surface 35 a of the outer portion 35 of the flange portion 26 of the container 20. Then, the part which overlaps the outer part 35 of the flange part 26 of the container 20 among the lid | cover 50 is heated from the upper surface 50a side using a hot plate etc., and the sealant layer of the lid | cover 50 is fuse | melted. As a result, the lid 50 can be welded to the upper surface 35 a of the outer portion 35 of the flange portion 26 of the container 20.

  Here, according to the present embodiment, as described above, at least portions of the upper surface 30a of the inner portion 30 and the upper surface 35a of the outer portion 35 that are in contact with the lower surface 50b of the lid 50 are located on the same plane. doing. For this reason, the lower surface 50b of the lid 50 can be more uniformly welded to the upper surface 35a of the outer portion 35 than when there is a step between the upper surface 30a of the inner portion 30 and the upper surface 35a of the outer portion 35. Thereby, it can suppress that the joining force between the flange part 26 of the container 20 and the lid | cover 50 varies according to a position or an individual | organism | solid, and can improve initial stage sealing performance.

(How to open a container with a lid)
Next, an example of a method for opening the lidded container 10 will be described.

  First, as indicated by reference numeral Fa in FIG. 2, an upward force is applied to a part of the end portion 26 e of the flange portion 26 of the container 20 to partially break the connecting portion 40. Thereafter, a force is applied to the outer portion 35 so that a part of the end portion 26e of the flange portion 26 of the container 20 is further lifted upward, thereby breaking the connecting portion 40 over one round. Thereby, as shown in FIG. 4, the lid 50 in a state where the outer portion 35 is joined can be removed from the container 20, and the container 20 can be used as the opening container 21. As shown in FIG. 2, when an upward force Fa is applied to a part of the end portion 26 e of the flange portion 26 of the container 20, at a position facing the portion to which the force Fa is applied, in the portion to which the force Fa is applied. When the lid 50 is peeled from the inner portion 30 of the flange portion 26 and the lid member 50 and the outer portion 35 are lifted upward, a downward force Fb acts on the end portion 26e of the flange portion 26 of the container 20. is there. Further, as shown in FIG. 4, the beams 41 and 42 formed of the broken connection portions 40 may remain on the outer end portion 30 e of the inner portion 30 and the inner end portion 35 e of the outer portion 35, respectively.

  In the present embodiment, as described above, the lid 50 with the outer portion 35 joined is removed from the container 20. Then, the opening part 28 of the opening container 21 can be covered again using the lid | cover 50 in the state to which the outer side part 35 was joined. For example, the opening container 21 can be resealed by covering the container 20 so that the outer portion 35 joined to the lid 50 is positioned outside the inner portion 30 of the opening container 21. FIG. 5 is a diagram illustrating a state in which the opening 28 of the opening container 21 is covered with the lid 50 in a state where the outer portion 35 is joined. In the present embodiment, as shown in FIG. 5, the lid 50 covers the opening container 21 so that the outer end 30 e of the inner portion 30 and the inner end 35 e of the outer portion 35 face each other in the horizontal direction. Therefore, the position of the lid 50 with respect to the opening container 21 can be stably maintained in the horizontal direction. 5 shows an example in which the lid 50 is removed from the container 20 so that there is a gap between the flash 41 and the flash 42, but there is a gap between the flash 41 and the flash 42. The lid 50 may be removed from the container 20 so that it does not.

  In the present embodiment, since the lid 50 with the outer portion 35 joined is removed from the container 20, the lid 50 is deformed as compared with the case where the lid 50 is detached from the container 20 alone. For example, the lid 50 can be prevented from being bent or curled. Therefore, when the opening container 21 is resealed using the lid 50, the flatness of the lid 50 can be maintained more stably.

  Note that various modifications can be made to the above-described embodiment. Hereinafter, modified examples 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 the corresponding parts in the above embodiment are used for the parts that can be configured in the same manner as in the above embodiment. A duplicate description is omitted. In addition, when it is clear that the operational effects obtained in the above-described embodiment can be obtained in the modified example, the description thereof may be omitted.

(Modification of the connecting part)
In the above-described embodiment, the example in which the connecting portion 40 continuously extends along the inner portion 30 over the entire circumference has been described. However, the present invention is not limited to this, and as shown in FIG. 6, the connecting portion 40 may extend intermittently along the inner portion 30 over the entire circumference. That is, when the connecting portion 40 is viewed in the circumferential direction along the outer end 30 e of the inner portion 30, the connecting portions 40 and the through holes 43 that penetrate the flange portion 26 may be alternately arranged. In this case, although not shown, the outer portion 35 is similar to the connecting portion 40 as long as the outer portion 35 can be maintained at least partially joined to the lid 50 when the lid 50 is removed from the container 20. May extend intermittently as well.

  In the example shown in FIG. 6, even if the outer portion 35 extends continuously over one round and the lid 50 is continuously joined to the upper surface of the outer portion 35 over one round, the lid 50 Is not bonded to the upper surface 30 a of the inner portion 30, it is conceivable that the contents accommodated in the lidded container 10 leak to the outside through the through hole 43. Therefore, in the example shown in FIG. 6, not only the lid 50 is at least partially joined to the upper surface 35 a of the outer portion 35, but also the lid 50 needs to be continuously joined to the upper surface 30 a of the inner portion 30 over the entire circumference. Become.

  By the way, as shown in FIG. 6, when the connection part 40 is extending intermittently, even if the thickness T3 of the connection part 40 is equal to or greater than the thickness T1 of the inner part 30 and the thickness T2 of the outer part 35, It is contemplated that 40 can be easily broken. Therefore, in the example shown in FIG. 6, it is not essential to make the thickness T3 of the connecting portion 40 smaller than the thickness T1 of the inner portion 30 and the thickness T2 of the outer portion 35. Of course, in the example shown in FIG. 6, the thickness T3 of the connecting portion 40 may be smaller than the thickness T1 of the inner portion 30 and the thickness T2 of the outer portion 35.

(Modification of outer part)
As shown in FIG. 7, the outer portion 35 may have a protruding portion 36 that protrudes inward at a position below the connecting portion 40. The protrusion 36 is configured to partially overlap the outer end 30e of the inner portion 30 when the lidded container 10 is viewed along the normal direction of the lid 50. By providing such a protrusion 36, it is possible to prevent the lid 50 to which the outer portion 35 is joined from moving left and right in the state where the opening container 21 is resealed using the lid 50. For this reason, resealability can be improved.

(Modification of outer part)
As shown in FIG. 8, the outer portion 35 may have a reinforcing portion 37 positioned below the lower surface 30 b of the inner portion 30. By providing such a reinforcing portion 37, the rigidity of the outer portion 35 can be increased. Thereby, it can further suppress that lid 50 after removing from container 20 curves or curls. For this reason, resealability can be improved. Moreover, when breaking the connection part 40 in order to open the container 10 with a lid | cover, the part in which the reinforcement part 37 is provided among the outer parts 35 can be made easy to pick. For this reason, the openability of the container 10 with a lid can be improved.

(Modification of outer part)
As shown in FIG. 9, the protrusion 36 described above may be provided on the reinforcement 37 described above. For example, the reinforcing portion 37 may be provided along the inner end portion 35 e of the outer portion 35, and the protruding portion 36 may be provided at the inner end portion 37 e of the reinforcing portion 37. Thereby, both the effect brought about by the modification shown in FIG. 7 and the effect brought about by the modification shown in FIG. 8 can be obtained.

(Modification of inner part)
As shown in FIG. 10, the end portion (outer end portion) 30e on the connecting portion side among the end portions of the inner portion 30 includes an inclined surface 30c that inclines downward as it goes inward. Also good. In other words, a notch may be formed in a portion located below the lower surface 40b of the connecting portion 40 in the outer end portion 30e of the inner portion 30. Thereby, durability of the metal mold | die for producing the container 20 can be improved.

(Modification of outer part)
As shown in FIG. 11, the outer portion 35 may have a wall portion 38 that is located above the upper surface 30 a of the inner portion 30 and located outside the lid 50. By providing such a wall portion 38 and enclosing the lid 50 of the lidded container 10 from the outside, the lid 50 of the lidded container 10 is peeled off from the outer portion 35 of the flange portion 26 of the container 20 by intention or error. This can be suppressed. Further, as in the case of the reinforcing portion 37 described above, the rigidity of the outer portion 35 can be increased by providing the wall portion 38. Thereby, it can further suppress that lid 50 after removing from container 20 curves or curls. Moreover, when breaking the connection part 40 in order to open the container 10 with a lid | cover, the part in which the wall part 38 is provided among the outer parts 35 can be made easy to pick. For this reason, the openability of the container 10 with a lid can be improved.

(Modification of outer part)
As shown in FIG. 12, a reinforcing portion 37 may be provided along the inner end portion 35 e of the outer portion 35. In this case, when the lid 50 is put on the opening container 21, the end portion on the connecting portion 40 side of the reinforcing portion 37 abuts on the outer end portion 30 e and the flash 41 of the inner portion 30, so that the inclined surface 35 c becomes the lid 50. It can function as a guide that guides down. For this reason, the resealing operation can be facilitated. In order to make the reinforcing portion 37 function effectively as a guide, the length L of the reinforcing portion 37 is preferably 2 mm or more. Moreover, you may provide the inclined surface 35c which inclines below in the edge part 37e inside the reinforcement part 37 as it goes outside. This can further facilitate the resealing operation.

  In addition, although some modified examples with respect to the above-described embodiment have been described, naturally, a plurality of modified examples can be applied in combination as appropriate. For example, as shown in FIG. 13, the outer portion 35 includes a reinforcing portion 37 provided along the inner end portion 35 e of the outer portion 35, and a protruding portion 36 provided on the inner end portion 37 e of the reinforcing portion 37. A wall portion 38 positioned above the upper surface 30a of the inner portion 30 and positioned outside the lid 50, and an inclined surface 30c is formed on the outer end portion 30e of the inner portion 30. Also good. As shown in FIG. 14, the outer portion 35 includes a reinforcing portion 37 provided along the inner end portion 35 e of the outer portion 35, and a protruding portion 36 provided at the inner end portion 37 e of the reinforcing portion 37. A wall portion 38 positioned above the upper surface 30a of the inner portion 30 and positioned outside the lid 50, and an inclined surface 35c is formed at the inner end portion 37e of the reinforcing portion 37. An inclined surface 30 c may be formed on the outer end 30 e of the inner portion 30.

(Other variations)
In the above-described embodiment, an example in which the lid 50 is welded to the flange portion 26 of the container 20 has been shown. However, the lid 50 is joined to the flange portion 26 of the container 20 as long as the sealed container 10 is sufficiently sealed and the outer portion 35 can be removed from the other parts of the container 20 together with the lid 50. The means for making it not limited to welding. The lid 50 may be attached to the container 20 using components that are separate from the container 20 and the lid 50, such as an adhesive.

DESCRIPTION OF SYMBOLS 10 Container with lid 20 Container 21 Opening container 22 Bottom surface 24 Side surface 26 Flange portion 26e End portion 30 Inner portion 30a Upper surface 30b Lower surface 30c Inclined surface 30e Outer end portion 35 Outer portion 35a Upper surface 35b Lower surface 35c Inclined surface 35e Inner end portion 36 Projection portion 37 Reinforcement portion 38 Wall portion 40 Connection portion 40a Upper surface 40b Lower surface 41 Beam 42 Beam 43 Through-hole 50 Lid

Claims (12)

A container having an opening formed therein;
A lid joined to the container so as to cover the opening of the container,
The container includes a bottom surface, a side surface erected from the bottom surface so as to spread around the outer edge of the bottom surface, and a flange portion continuously provided on the upper portion of the side surface,
The flange portion is provided between an inner portion continuously connected to the side surface over the entire circumference, an outer portion located outside the inner portion, and the inner portion and the outer portion, And a connecting portion connecting the outer portion,
The connecting portion extends continuously along the inner portion over a circumference;
The lid is continuously joined to at least one of the upper surface of the outer portion or the upper surface of the inner portion over a circumference, and is at least partially joined to the upper surface of the outer portion;
The thickness of the connecting portion is smaller than the thickness of the inner portion and the outer portion,
The lidded container, wherein the upper surface of the inner portion and the upper surface of the outer portion are at least partially located on the same plane.   The said outer part is a container with a lid | cover of Claim 1 continuously extended along the said connection part over a round. A container having an opening formed therein;
A lid joined to the container so as to cover the opening of the container,
The container includes a bottom surface, a side surface erected from the bottom surface so as to spread around the outer edge of the bottom surface, and a flange portion continuously provided on the upper portion of the side surface,
The flange portion is provided between an inner portion continuously connected to the side surface over the entire circumference, an outer portion located outside the inner portion, and the inner portion and the outer portion, And a connecting portion connecting the outer portion,
The connecting portion extends intermittently along the inner portion over a circumference;
The lid is continuously joined to the upper surface of the inner portion over the entire circumference and at least partially joined to the upper surface of the outer portion;
The lidded container, wherein the upper surface of the inner portion and the upper surface of the outer portion are at least partially located on the same plane.   The outer portion has a protrusion protruding inward at a position below the connecting portion so as to partially overlap the inner portion when the lidded container is viewed along the normal direction of the lid. The container with a lid | cover as described in any one of Claims 1 thru | or 3.   The said outer part is a container with a lid | cover as described in any one of Claims 1 thru | or 4 which has a reinforcement part located below rather than the lower surface of the said inner part.   The said outer part is a container with a lid | cover as described in any one of Claims 1 thru | or 5 which has a wall part located above the upper surface of the said inner part, and is located outside the said lid | cover.   5. The container with a lid according to claim 4, wherein at least a part of the end part of the inner part on the connection part side includes an inclined surface that inclines downward toward the inner side.   The lid attachment according to any one of claims 1 to 7, wherein a joining force between the lid and an upper surface of the outer portion is larger than a joining force between the lid and the inner portion. container. A container having an opening formed therein,
A bottom surface, a side surface erected from the bottom surface so as to spread over the outer edge of the bottom surface, and a flange portion continuously provided on the upper portion of the side surface,
The flange portion is provided between an inner portion continuously connected to the side surface over the entire circumference, an outer portion located outside the inner portion, and the inner portion and the outer portion, And a connecting portion connecting the outer portion,
The upper surface of the inner portion and the upper surface of the outer portion are at least partially located on the same plane. The connecting portion extends continuously along the inner portion over a circumference;
10. A container according to claim 9, wherein the outer portion extends continuously along the connecting portion over a circumference.   The container according to claim 9 or 10, wherein the connecting portion extends intermittently along the inner portion over a circumference.   The container according to any one of claims 9 to 11, wherein a thickness of the connecting portion is smaller than a thickness of the inner portion and a thickness of the outer portion.

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