JP5654156B1 - Sealed container - Google Patents

Abstract

Provided is a sealed container that can display a lot of information printed on a lid and can be easily manufactured. A hermetically sealed container (1) comprising a container body (10) having a housing part (11) and a flange part (12) and a lid member (20), the lid member (20) being formed of a transparent member or a semi-transparent member and printing. The upper layer lid 21 having a portion and the lower layer lid 22 having a printing portion on the upper surface, the lower layer lid 22 and the flange portion 12 are bonded over the entire circumference, and the upper layer lid 21 and the lower layer lid 22 are bonded together. The lid member 20 is partially bonded on the outer peripheral side of the housing portion 11 with respect to the bonding portion 23 between the lower layer lid 22 and the flange portion 12, and the lid member 20 opposes the peeling start portion 26 and the opening start portion 27 with the housing portion 11 interposed therebetween. The opening start portion 27 is arranged on the outer peripheral side of the bonding location 23, and the adhesive strength between the upper layer lid 21 and the lower layer lid 22 in the opening start portion 27 is determined between the lower layer lid 22 and the flange portion 12. It was larger than the adhesive strength. [Selection] Figure 1

Description

  The present invention relates to a sealed container including a container body having a housing part and a flange part, and a lid member for sealing the container body.

  For example, a container for storing contents such as yogurt has a flange (edge) formed around the open upper end of the storage, and the container is sealed by fixing a lid to the flange. Yes. In such a container, the container is opened by peeling the lid from the flange portion. On the upper surface of the lid member, various information indicating the contents to be accommodated, the manufacturer, and the like are printed in addition to the logo mark of the product name. In addition, recently, various information such as the names of raw materials and nutritional components used for food allergy countermeasures, health foods, diets, and the like are also required. As described above, when the amount of information to be printed on the lid member increases, it becomes difficult to see the display if all information is printed in a limited space of the lid member.

  In addition, a container having a plurality of storage portions and a flange portion of each storage portion being connected to divide and store the contents is also known. In such a container, various types of information are printed on the entire upper surface of the lid member, but if individual containers are separated, necessary information cannot be seen. Therefore, wrapping a label printed with a logo mark and various information around the outer surface side (body part) of each container housing part, or wrapping paper such as cardboard with information printed on the entire container, It is known to wrap a container. However, in order to wrap the label around the body of the container, it is necessary to carry out the process in the manufacturing process of the container. For example, the molding process can be performed by attaching a label on which information is printed in advance to a mold for molding the container. Done. Therefore, the equipment for manufacturing the container becomes large, and the time and labor required for manufacturing increase. Further, when discarding the container, it is necessary to remove the label from the body of the container, which is troublesome. Also, since the paper wrapping paper is discarded as soon as it is opened, information cannot be seen after opening.

  On the other hand, it is proposed that the container lid is made of a double structure of an upper lid and a lower lid, various information is printed on the upper surface of each lid, and the lid is peeled off to display the information (patent) Reference 1). Moreover, the sealed container which opens the container after connecting the end of a double sheet | seat as a cover material and peeling each sheet | seat is proposed (patent document 2).

Japanese Patent No. 3936012 Japanese Patent No. 4915932

  By the way, in patent document 1 and patent document 2, each lid | cover (or sheet | seat) used for a lid | cover material is adhere | attached the whole surface so that peeling is possible, The flange part (edge part) of a container is used using such a lid | cover material. ) To seal the container. However, in order to peel off the cover member to which the entire surface is bonded, it is necessary to provide a release layer on the lower surface of the upper cover member (hereinafter referred to as the upper cover). On the other hand, in order to open the lid from the container, a release layer is provided between the lower lid (hereinafter referred to as the lower layer lid) and the flange portion of the container. For this reason, it is necessary to provide a release layer on the lower surfaces of both the upper layer lid and the lower layer lid, which increases the cost of the lid material.

  Moreover, as shown in Patent Document 2, in order to open the container, the adhesive strength between the lower layer lid and the container is made stronger than the adhesive strength between the upper layer lid and the lower layer lid, and the strength of these continuous portions Needs to be larger than the adhesive strength between the lower surface of the lower lid and the container. Furthermore, when bonding such a lid material to a container, it is conceivable to prepare a lid material in which an upper layer lid and a lower layer lid are bonded together in advance, and bond it to the container. When bonding the material and the container, it is necessary to prevent the adhesive strength between the upper layer lid and the lower layer lid from being affected. Therefore, for example, it is necessary to devise such as changing the bonding means for bonding the lid materials and bonding the lid material and the container, and there is a problem that it takes time to manufacture the sealed container.

  In view of the above circumstances, an object of the present invention is to provide a sealed container that can display a large amount of information printed on a lid and can be easily manufactured.

In order to solve the above-mentioned problems, a sealed container according to the present invention includes a housing portion whose upper end is open, a flange portion projecting from the upper end of the housing portion to the outer peripheral side, and an adhesive portion attached to the flange portion. An airtight container having a lid to be sealed, the lid being formed of a transparent member or a translucent member, and having an upper layer lid having a printing portion on at least one of the upper surface and the lower surface, and printing on at least the upper surface A lower layer lid having a portion, and adhering the lower layer lid and the flange portion around the entire periphery of the opening of the housing portion, and bonding the upper layer lid and the lower layer lid to the lower layer lid and the flange portion. The lid material is partially adhered to the outer peripheral side of the housing portion, and the lid material starts to be peeled by the peeling start portion for starting peeling of the upper layer lid and the lower layer lid, and peeling of the lower layer lid and the flange portion. Open the opening with the container The opening start portion is disposed on the outer peripheral side of the housing portion with respect to the adhesion portion between the lower layer lid and the flange portion, and the adhesive strength between the upper layer lid and the lower layer lid at the opening start portion is It is characterized in that it is larger than the adhesive strength with the flange portion.

According to such a configuration, the lid member is formed of a transparent member or a translucent member, and has an upper layer lid having a printing portion on at least one of the upper surface and the lower surface, and a lower layer lid having a printing portion on at least the upper surface. Since it can be confirmed that the upper surface of the lower layer lid is printed through the upper layer lid, it is easy to understand that the lid material has a double structure. Moreover, the information printed on the upper surface of the lower layer lid can be displayed by peeling the upper layer lid and the lower layer lid. At this time, since the lower layer lid and the flange portion are bonded around the entire periphery of the opening of the housing portion, and the upper layer lid and the lower layer lid are partially bonded, partial adhesion between the upper layer lid and the lower layer lid The adhesive strength of is lower than the adhesive strength of linear adhesion between the lower layer lid and the flange lid. In addition, since the adhesion between the upper lid and the lower lid is on the outer peripheral side of the housing portion with respect to the bonding portion between the lower lid and the flange portion, the upper lid may be adhered even if the upper lid and the lower lid are slightly adhered. When peeling between the lower lid and the lower lid, partial unsealing due to peeling between the lower lid and the flange portion can be prevented. Therefore, the upper layer lid and the lower layer lid can be reliably peeled off.

  Here, since the upper layer lid and the lower layer lid are partially bonded and not entirely bonded, no peeling layer is required for the upper layer lid. Therefore, the cost (cost) of the upper lid member can be suppressed. In addition, it is only necessary to bond a lid material provided with an upper layer lid and a lower layer lid to the container body, and it is not necessary to wrap a label around the outer surface side of the housing part during the production of the container, so it is easy to produce a sealed container can do. Furthermore, the same adhesion method can be used for the adhesion between the upper layer lid and the lower layer lid and the adhesion between the lower layer lid and the flange portion.

  Moreover, since the peeling start part of the upper layer lid and the lower layer lid and the opening start part of the lid material are arranged at positions separated from each other, when peeling of the upper layer lid and the lower layer lid starts from the peeling start part, the peeling start part The container lid can be opened at a position away from the container. By the way, depending on the contents accommodated in the container, this type of container may spill or scatter at the start of opening due to the pressure in the container. Therefore, the opening operator can start opening at a position away from the peeling start portion when peeling starts with the peeling start portion on the near side. Therefore, even if the contents are scattered from the opening start part, it can be shielded by the lid material partially opened, and the scattered contents can be prevented from being applied to the opening operator. Further, at this time, the opening start portion is closer to the outer periphery side of the housing portion than the bonding portion between the lower layer lid and the flange portion, and the adhesive strength between the upper layer lid and the lower layer lid in the opening start portion is set to Since it is larger than the adhesive strength, the opening can be reliably started at the opening start portion.

  Furthermore, the container body has a plurality of accommodating portions and a flange portion that connects between the adjacent accommodating portions, and is separable into a flange portion between adjacent accommodating portions and a lid material bonded to the flange portion. A broken portion may be formed. Thereby, the above-mentioned airtight container is formed by separating a container for every storage part by a fracture part. At this time, since the lid member has an upper layer lid and a lower layer lid, the upper layer lid and the lower layer lid can be separated by peeling the upper layer lid from the lower layer lid even if the area of the lid member is reduced due to separation. A lot of information printed on can be displayed.

  The closed container manufacturing method as described above is a method for forming a lower layer film that covers an opening of a storage unit and forms a lower layer cover on a container body in which a storage unit and a flange unit are formed by molding a sheet-like resin material. The lower layer film and the flange portion are supplied and bonded around the entire circumference of the opening, the upper layer film constituting the upper layer lid is supplied to the upper surface of the lower layer film, and the upper layer film and the lower layer film are It is characterized in that it is partially bonded on the outer peripheral side of the bonding portion between the lower layer film and the flange portion, and a part of the flange portion is trimmed.

  In order to produce a sealed container by supplying and bonding a lower layer film and an upper layer film sequentially to a container body in which a housing part and a flange part are formed by producing a sealed container by the above method, An airtight container can be manufactured in a series of manufacturing processes. Therefore, it is not necessary to prepare a cover material bonded in advance, and it is not necessary to prepare a label to be wound around the body of the container. Therefore, it can suppress that the manufacturing equipment of a container becomes large. Also, after bonding the lower layer film and the flange portion constituting the lower layer lid, the upper layer film constituting the upper layer lid is supplied and the lower layer film and the flange portion are bonded to bond the upper layer film to the lower layer film. The upper film can be bonded to the lower film without any problem. Furthermore, even if a part of the lower layer film and the flange portion may adhere to each other at that time, the adhesion point between the upper layer film and the lower layer film is closer to the outer peripheral side than the adhesion point between the lower layer film and the flange portion. Therefore, it is possible to peel the upper layer film and the lower layer film without peeling the lower layer film and the flange portion.

  As described above, according to the present invention, it is possible to provide a sealed container that can display a large amount of information printed on a lid member and can be easily manufactured.

It is a perspective view which shows the airtight container concerning one Embodiment of this invention. It is a top view of the airtight container of FIG. It is sectional drawing in AA of FIG. It is a figure which shows the peeling state of the airtight container of FIG. It is a figure which shows the open state of the airtight container of FIG. It is a perspective view which shows the airtight container concerning other embodiment of this invention. It is a schematic diagram which shows the manufacturing apparatus which manufactures the airtight container concerning one Embodiment of this invention.

  Hereinafter, one embodiment of a sealed container according to the present invention will be described with reference to the drawings.

  The sealed container of the present invention is a container that contains contents such as yogurt and has a container sealed with a lid. As shown in FIGS. 1 to 3, the sealed container 1 has a substantially cubic shape, and a container main body 10 in which contents are stored, and a lid member 20 that is bonded to the container main body 10 to seal the container main body 10. Is provided. The lid member 20 is made of a thin material, and the thickness dimension is exaggerated in the drawing.

  The container main body 10 is manufactured by molding a resin material such as polypropylene, and includes a housing portion 11 having an open upper end, and a flange portion 12 projecting from the upper end of the housing portion 11 to the outer peripheral side. In the present embodiment, the flange portion 12 has a substantially square shape having rounded (curved) corner portions. Further, a notch 13 is formed at one corner of the flange portion 12 to become a peeling start portion 26 described later (see FIG. 3).

As shown in FIG. 3, the lid member 20 is formed by laminating an upper layer lid 21 and a lower layer lid 22. The upper layer lid 21 has a printing unit on the upper surface side, and for example, a logo mark of a product is printed. In the present embodiment, the upper layer lid 21 is formed of a transparent member. The lower layer lid 22 also has a printing part on the upper surface side. For example, information by characters such as raw materials and component display is printed on the printing portion of the lower layer lid 22. Moreover, the lower surface side of the lower layer lid 22 has a release layer that facilitates release after bonding. On the other hand, the lower layer side of the upper lid 21 does not have a release layer. In addition, although the upper layer lid | cover 21 used the transparent member, it is not restricted to this, You may form with a translucent member.

  The lower layer lid 22 is bonded to the flange portion 12 of the container body 10. In detail, as shown in FIG. 1, it adhere | attaches linearly over the perimeter of the circumference | surroundings of the opening of the accommodating part 11 (it shows with the adhesion part 23 in the illustration). Further, the upper lid 21 and the lower lid 22 of the lid member 20 are partially spot-bonded (indicated by a spot bonding portion 24 in the drawing). In the present embodiment, the spot adhesion portion 24 between the upper layer lid 21 and the lower layer lid 22 has a small circular shape and is adhered at two locations on each side of the flange portion 12. Furthermore, the upper layer lid 21 and the lower layer lid 22 are bonded to each other in a slightly wide range along the periphery of the lid member 20 at a corner portion at a position facing the notch 13 serving as the peeling start portion 26 and the accommodating portion. (Indicated in the figure is the corner adhesive portion 25). This corner | angular part adhesion part 25 becomes the opening start part 27 which starts peeling (opening) the cover material 20 and the flange part 12 of the airtight container 1 so that it may mention later.

  Next, based on FIG.4 and FIG.5, peeling and unsealing operation | movement of the cover material 20 of the airtight container 1 concerning this embodiment is demonstrated. First, the peeling of the upper lid 21 and the lower lid 22 of the lid member 20 is started from the peeling start portion 26 of the sealed container 1 (see FIG. 4). Specifically, in the peeling start portion 26 at the corner portion having any notch 13 of the flange portion 12, the end of the upper layer lid 21 is pulled upward (indicated by arrow B in FIG. 4) to start peeling. At this time, when the lid member 20 is bent downward in the notch 13, the end portions of the upper layer lid 21 and the lower layer lid 22 are displaced, so that peeling is easily started. Subsequently, the upper layer lid 21 is further lifted upward, and the spot adhering portions 24 are sequentially peeled, whereby the upper layer lid 21 and the lower layer lid 22 are peeled off.

  At this time, since there is no release layer on the back surface of the upper layer lid 21, it is strongly bonded to the lower layer lid 22, but the bonding area is narrower than the bonding portion 23 between the lower layer lid 22 and the flange portion 12. Therefore, the adhesion part 23 is not peeled off in the vicinity of the spot adhesion part 24, and the spot adhesion part 24 can be reliably peeled off. In addition, since the spot adhesion part 24 is formed in the outer peripheral side rather than the adhesion part 23 of the lower layer lid | cover 22 and the flange part 12, when the spot adhesion part 24 peels, the lower layer lid | cover 22 may be torn. However, since the adhesive part 23 is not affected, the contents in the sealed container 1 will not overflow.

Peeling of the upper layer lid 21 and the lower layer lid 22 proceeds in a direction along the diagonal line from the peeling start portion 26. At this time, since the printing information printed on the upper surface side of the lower layer lid 22 is displayed by the peeling of the upper layer lid 21, the information printed on the upper surface side of the lower layer lid 22 by peeling the upper layer lid 21. Can be displayed. Therefore, there is no need to wrap a label on which information is printed around the body of the container, and the labor of manufacturing the container can be saved. In addition, a wider printing area can be ensured than when information is printed only on the upper surface side of the lid member 20. Note that a printing unit may be further provided on the lower surface side of the upper layer lid 21 to print other various types of information. Further, the printing unit may be provided only on the lower surface side of the upper layer lid 21, or the printing unit may be provided on both the upper surface side and the lower surface side of the upper layer lid 21. Anyway, in the present embodiment, since the upper layer cover 21 Toru bright portion material, is easy to understand that the cover member 20 is a double structure, the printing content of the upper surface of the lower lid 22, the upper lid 21 It can be easily confirmed from above.

  Further, the peeling between the upper lid 21 and the lower lid 22 is advanced to the corner adhesive portion 25 facing the peeling start portion 26 across the accommodating portion 11, and then the upper lid 21 is pulled to the near side, Opening of the lid member 20 (peeling between the lower layer lid 22 and the flange portion 12) is started from the opening start portion 27 (see FIG. 5). At this time, since the corner portion bonding portion 25 is located on the outer peripheral side with respect to the bonding portion 23 between the lower layer lid 22 and the flange portion, it is possible to reliably start the peeling of the bonding portion 23 at the opening start portion 27. In addition, since the lower layer lid 22 has a release layer on the lower surface side, the adhesive strength between the lower layer lid 22 and the flange portion 12 is smaller than the adhesive strength between the upper layer lid 21 and the lower layer lid 22 at the corner bonding portion 25. ing. Therefore, it is possible to surely peel off the bonding portion 23 without peeling off the bonding of the corner portion bonding portion 25.

  Here, when the contents are filled in the container 11 of the sealed container 1 without a gap, or when the pressure inside the container is increased, the opening of the lid member 20 is started to start Parts may overflow or scatter. However, since the opening start portion 27 is provided at a position away from the peeling start portion 26, the contents can be prevented from scattering toward the opening operator at the time of opening. Specifically, at the start of opening, since the lower layer lid 22 peeled off from the flange portion 12 is lifted toward the opening operator side, the scattered content even if the contents are scattered from the opening location. An object can be shielded by the lower layer lid 22 in a partially opened state.

  Further, pulling the peeled upper layer lid 21 toward the front side or pulling up the lower layer lid 22 that has been opened, peels off the adhesive portion 23 between the lower layer lid 22 and the flange portion 12 to advance the opening. Can do. In this way, by peeling off the entire area of the bonding portion 23, the opening can be completed and the lid member 20 can be removed from the container body 10.

  FIG. 6 shows another embodiment of the sealed container 2 according to the present invention. The sealed container 2 in the present embodiment includes a container main body 30 in which contents are stored, and a lid member 40 that is bonded to the container main body 30 and seals the container main body 30. Hereinafter, the configuration different from the above-described sealed container 1 will be mainly described. In the sealed container 2 according to the present embodiment, the container main body 30 includes a plurality (four in the drawing) of accommodating portions 31 and a flange portion 32 that connects between the adjacent accommodating portions 31.

  A fracture portion 48 is formed in the flange portion 32 and the lid member 40 between the adjacent accommodating portions 31. In the present embodiment, a perforation is formed in the breaking portion 48, and each accommodating portion 31 can be separated by breaking the perforation. Note that, in the fracture portion 48, the thickness dimension around the perforation may be compressed so as to be smaller than the thickness dimension of the flange portion 32. As a result, even if the container body 30 is made of a slightly soft material such as polypropylene, it can be cured by compression and can be easily broken at the breaking portion 48. Further, notches 33 serving as peeling start portions 46 are formed at the four corners of the flange portion 32 of the container body 30.

  The lid member 40 is bonded to the flange portion 32 around each housing portion 31. Specifically, the lid member 40 is bonded over the entire circumference around the opening of each housing portion 31 (indicated by the bonding portion 43 in the drawing). The lid member 40 is formed by bonding an upper layer lid 41 and a lower layer lid 42 as in the above embodiment. The upper layer lid 41 has a printing portion on the upper surface side, and for example, a logo mark of a product or the like is printed over the entire lid member 40. On the upper surface side of the lower layer lid 42, for example, information such as raw material and component display is printed at each position corresponding to each housing portion 31. The bonding portion between the upper layer lid 41 and the lower layer lid 42 is spot-bonded (indicated by a spot bonding portion 44 in the drawing).

  In addition, the upper layer lid 41 and the lower layer lid 42 are formed at the fracture portion 48 (periphery of the lid member 40 after being separated) at a position facing the notch 33 serving as the peeling start portion 46 and the accommodating portion 31 therebetween. It is bonded in a slightly wide range along (indicated by a corner bonding portion 45 in the drawing). The corner adhesive portion 45 becomes an opening start portion 47. In the present embodiment, the corner adhesion portion 45 is formed near the center of the sealed container 2.

  About peeling and unsealing operation | movement of the lid | cover material 40 of the airtight container 2 concerning this embodiment, if each airtight container 2 is isolate | separated by breaking the fracture | rupture part 48 of the airtight container 2, the airtight container 1 of the above-mentioned embodiment and It becomes the same form. Therefore, the peeling operation and the opening operation of the lid member 40 are the same as those described above, and thus detailed operation description is omitted.

  As described above, in the sealed container 2 having the plurality of accommodating portions 31, a logo mark or the like is printed on the entire upper cover 41 in the sealed container 2 before separation. The lower layer lid 42 is printed with various character information such as raw material and component display. Therefore, when the upper lid 41 and the lower lid 42 are peeled off after separating each sealed container 2, the character information on the surface of the lower lid 42 can be seen. Note that character information to be printed on the lower layer lid 42 may be printed on a part of the upper layer lid 41. As described above, even in the sealed container 2 having the plurality of accommodating portions 31, a lot of information can be printed by bonding the peelable lid member 40 having the printing portion. At this time, since it is not necessary to wrap a label on which information is printed around the trunk portion of the sealed container 2, it is possible to save labor for manufacturing the container.

  In the present embodiment, the number of the accommodating portions 31 is four. However, the number of the accommodating portions 31 is not limited thereto, and may be two, three, or five or more. Moreover, the fracture | rupture part 48 is not restricted to a perforation, You may cut in a part of thickness direction and may form a half cut. When the container body 30 is made of a slightly hard material such as polystyrene, it can be easily broken. Furthermore, the position of the notch 33 formed in the flange portion 32 is not limited to the corner portion, and can be appropriately set at one corner of the flange portion 32 that becomes the corner portion in the sealed container 2 in a separated state.

  In each of the above embodiments, the notches 13 and 33 are formed in one corner corresponding to the peeling start portions 26 and 46 of the flange portions 12 and 32 of the container main bodies 10 and 30, but the present invention is not limited to this. . For example, the end portions of the corner portions of the flange portions 12 and 32 may be positioned below a step, or the end portions of the corner portions may be inclined downward. At this time, corner portions corresponding to the peeling start portions 26 and 46 of the lower layer lids 22 and 42 may be slightly weakly spot-bonded with corner portions of the flange portions 12 and 32 inclined downward, for example. As a result, the corners of the lower layer lids 22 and 42 are positioned below the other regions of the flange portions 12 and 32, so that the upper layer lids 21 and 41 stacked on the lower layer lids 22 and 42 are between them. A gap is formed. Therefore, peeling of the upper layer lids 21 and 41 at the peeling start portions 26 and 46 can be easily started. Furthermore, the lid members 20 and 40 (or the upper layer lids 21 and 41) may be protruded more outward than the flange portions 12 and 32 without processing the flange portions 12 and 32. Even in this case, peeling from the peeling start portions 26 and 46 can be easily started.

  Further, in bonding the upper layer lids 21 and 41 and the lower layer lids 22 and 42, the corner bonding portions 25 and 45 are not necessarily provided. In this case, the upper layer lids 21 and 41 are removed from the lower layer lids 22 and 42 by peeling from the peeling start portions 26 and 46. At this time, the peeling (opening) of the lower lids 22 and 42 can be appropriately started from the peeling start portions 26 and 46 (notches 13 and 33) and other corner portions of the flange portions 12 and 42.

  Then, based on FIG. 7, the manufacturing apparatus 50 and manufacturing method which manufacture the airtight container 1 are demonstrated. In addition, even if it is manufacture of the airtight container 2 which has the some accommodating part 31, since it is a structure substantially the same, it demonstrates centering on the example of the apparatus which manufactures the airtight container 1 which has the single accommodating part 11. FIG.

  As shown in FIG. 7, the manufacturing apparatus 50 of the sealed container 1 includes a sheet supply unit 51, a forming unit 52, a filling unit 53, a lower film supply unit 54, a first bonding unit 55, an upper film supply unit 56, and a second bonding. The unit 57, the trimming unit 58, and the like. These parts are sequentially arranged from the upstream side to the downstream side so that the sealed container 1 can be manufactured through a series of manufacturing processes. Moreover, the airtight container 1 under manufacture is intermittently conveyed in the process of each part by a driving means (not shown).

  The sheet supply unit 51 supplies a resin sheet S1 that is a material of the container body 10, and includes a holding unit (not shown) that rotatably holds the roll-shaped resin sheet S1, a supply roller 51A, and the like. In the present embodiment, the resin sheet S1 is mainly composed of polyethylene (more strictly, low density polyethylene) and polypropylene, and a mixed resin in which a predetermined amount of polyethylene is mixed (for example, 100 parts by weight of polypropylene, The inner layer is made of polyethylene and the base material layer is made of the above mixed resin by co-extrusion with 5-20 parts by weight of a mixed resin mixed with polyethylene. Although the thickness of each layer is arbitrarily adjusted according to the use etc., for example, the thickness of the inner layer is about 10 to 50 μm, while the thickness of the base material layer is about several hundred μm. The resin sheet S1 may be a sheet mainly made of polystyrene.

  The molding part 52 forms the accommodating part 11 and the flange part 12 with respect to the resin sheet S1, and a set of molds is arranged in the vertical direction. The upper mold 52A is a convex mold, and the lower mold 52B is a concave mold. Further, the upper mold 52A and the lower mold 52B are connected to a drive mechanism (not shown), and each moves in the vertical direction to press-mold the resin sheet S1. In this embodiment, the several accommodating part 11 with which the flange part 12 was connected by one press is formed. A notch 13 is formed at one corner of the flange portion 12. One corner of the flange portion 12 is not limited to the notch 13, and the tip end portion of the corner portion of the flange portion 12 may be positioned below the step portion, and the tip end portion of the corner portion is positioned below. You may make it incline.

  The filling part 53 supplies the content to the shape | molded accommodating part 11, and has a content supply apparatus. The content supply device is provided with a storage tank 53A for storing the content and a plurality of supply ports 53B connected to the storage tank 53A, and supplies a predetermined amount of the content from each supply port 53B to each storage unit 11.

  The lower layer film supply unit 54 supplies the lower layer film S2 serving as the lower layer lid 22, and includes a holding means (not shown) that rotatably holds the roll-shaped lower layer film S2, a supply roller 54A, and the like. The width dimension of the lower layer film S2 is substantially the same as or slightly larger than the resin sheet S1. The lower layer film S2 is formed by molding a polyolefin-based resin, a polyamide-based resin, a polyethylene terephthalate-based resin, or the like into a film shape, and a single layer or a multilayer is selected according to required characteristics. Note that a metal oxide such as aluminum oxide, a gas barrier such as aluminum foil, or the like may be provided. In this embodiment, various character information etc. are printed on the upper surface side of lower layer film S2, and a peeling layer is formed in the lower surface side.

  The 1st adhesion part 55 adheres the flange part 12 and lower layer film S2 of the container main body 10 linearly, the support part which is not shown in figure which supports the flange part 12 from the downward direction, and the 1st movable in the up-down direction. 1 heating means 55A. On the lower surface side of the first heating means 55A, a heater (not shown) is provided at a position corresponding to the bonding portion 23, and by pressing the lower layer film S2 from above by the first heating means 55A, The lower layer film S2 and the flange portion 12 are bonded. In the present embodiment, the heater is disposed in a region corresponding to a position over the entire circumference around the opening of the housing portion 11. When one corner of the flange portion 12 is inclined downward, for example, the inclined corner portion and the lower layer film S2 may be slightly weakly spot-bonded.

The upper film supply unit 56 supplies the upper film S3 to be the upper cover 21, and includes a holding means (not shown) that rotatably holds the roll-shaped upper film S3, a supply roller 56A, and the like. The upper film S3 is formed by forming a polyolefin resin, a polyamide resin, a polyethylene terephthalate resin, or the like into a film like the lower film S2, and a single layer or a multilayer is selected according to required characteristics. Used in a transparent or translucent state. Further, it has a width dimension substantially the same as or slightly larger than that of the lower layer film S2. In the present embodiment, a logo mark or the like is printed on the upper surface side of the upper layer film S3, and no release layer is provided on the lower surface side. Various information may be printed on the lower surface side of the upper film S3. Moreover, you may arrange | position the printing machine which prints a manufacture date etc. on the upper surface side of upper layer film S3 in the conveyance path | route of upper layer film S3.

  The second bonding portion 57 partially bonds the lower layer film S2 and the upper layer film S3, and similarly to the first bonding portion 55, a support portion (not shown) that supports the flange portion 12 of the container body 10 from below. And a second heating means 57A movable in the vertical direction, and a heater (not shown) on the lower surface side of the second heating means 57A. In the present embodiment, the heater is disposed on the outer peripheral side of the position corresponding to the bonding portion 23 between the lower layer film S <b> 2 and the flange portion 12, and at two locations on each side of the flange portion 12. In addition, a heater is disposed at a position corresponding to the corner bonding portion 25 at a position facing the container body 10 with the accommodating portion 11 interposed therebetween. In addition, the position of the spot adhesion part 24 in the 2nd adhesion part 57 is not restricted to two places of each edge | side of the flange part 12, One place or three places or more may be sufficient. Further, the bonding position and the number of the spot bonding portions 24 may be different for each side of the flange portion 12. Further, the shape of the spot bonding portion 24 is not limited to a small circular shape as illustrated, and may be a polygonal shape or various shapes, and may be bonded so as to have a short linear shape or the like. . Further, the heater at a position corresponding to the corner bonding portion 25 may be omitted.

  The trimming part 58 is cut so as to have the shape of the manufactured product, and has a trimming blade 58A that moves in the vertical direction. Specifically, the trimming blade 58A is used to cut the individual sealed containers 1 so that the corners of each sealed container 1 are rounded. When manufacturing the sealed container 2 having the plurality of accommodating portions 31, the trimming portion 58 uses a trimming blade 58 </ b> A capable of forming a perforation of the fracture portion 48 in the flange portion 32. At this time, a compression unit that compresses the perforation may be provided around the trimming blade 58A.

  On the downstream side of the trimming unit 58, a conveying unit that conveys the individually separated sealed containers 1 is arranged, and after being collected in a collecting unit (not shown), it is packed in a shipping box and shipped. In addition, in the manufacturing apparatus 50, you may arrange | position the process which performs a post-process suitably in the downstream of each part which performs each manufacturing process. For example, a cleaning unit and a drying unit for cleaning the molded container body 10 may be provided on the downstream side of the molding unit 52, and sterilization is performed on the downstream side of the filling unit 53 and the trimming unit 58 by heating, ultraviolet irradiation, or the like. A sterilizing unit may be provided.

  Next, operation | movement of the manufacturing apparatus 50 of the airtight container 1 is demonstrated. In the manufacturing apparatus 50, the resin sheet S1 is intermittently supplied and conveyed, and each part is processed. First, in the sheet supply unit 51, a predetermined amount of the resin sheet S1 is supplied to the molding unit 52 by a supply roller (not shown).

  In the molding part 52, the lower mold 52B is raised from below, and the upper mold 52A is lowered while the resin sheet S1 is supported, whereby the resin sheet S1 is press-molded. As a result, the molded region becomes the accommodating portion 11, and the periphery of the accommodating portion 11 becomes the flange portion 12, whereby the container body 10 is formed. In this state, the plurality of accommodating portions 11 are connected by the flange portion 12.

  Subsequently, in the filling unit 53, a predetermined amount of content is supplied to each storage unit 11. The content may be, for example, a semi-solid liquid such as yogurt or jelly, or a solid such as fruit and a liquid such as honey. In addition, the quantity of the supplied contents may be filled to the full with respect to the accommodating part 11 of the airtight container 1, for example, may be about the eighth minute.

  In the lower layer film supply part 54, lower layer film S2 is supplied with respect to the container main body 10 with which the content was filled so that the whole container main body 10 might be covered. The lower layer film S2 is prevented from being displaced by being pressed from above by a rotatable roller (not shown) in the flange portion 12 of the container body 10. Furthermore, in the 1st adhesion part 55, lower layer film S2 and the flange part 12 are adhere | attached. Bonding in the first bonding portion is performed over the entire circumference around the opening of the housing portion 11 of the container body 10 by lowering the first heating means 55A in which a heater (not shown) is heated to a predetermined temperature. The lower layer film S2 and the flange portion 12 are bonded by heating and heat melting.

  In the upper layer film supply unit 56, the upper layer film S3 is supplied so as to cover the lower layer film S2, similarly to the lower layer film supply unit 54. Furthermore, in the 2nd adhesion part 57, upper layer film S3 and lower layer film S2 are adhere | attached. As in the case of the first bonding portion 55, the bonding at the second bonding portion 57 is performed by the first bonding portion 55 by lowering the second heating means 57A in which a heater (not shown) is heated to a predetermined temperature. A predetermined position on the outer peripheral side of the formed region is heated, and the upper film S3 and the lower film S2 are bonded by thermal melting. At this time, the lower layer film S2 and the flange portion 12 are not bonded by the second heating means 57A of the second bonding portion 57.

  Finally, the trimming unit 58 is cut into individual sealed containers 1. In the trimming part 58, when the trimming blade 58A is lowered, the flange part 12 is cut so as to have a predetermined shape, and each sealed container 1 is separated. By changing the type of the trimming blade 58 </ b> A, the individual sealed container 1 or the sealed container 2 having the plurality of accommodating portions 31 can be manufactured. In this way, the sealed container 1 including the easily peelable lid member 20 is formed. The produced sealed container 1 is collected in a collecting unit (not shown), and is packed in a shipping box and shipped.

  In addition, when the conveyance of the resin sheet S1 (container body 10) is stopped, the operation of the entire manufacturing apparatus 50 is performed by the molding unit 52, the filling unit 53, the first bonding unit 55, the second bonding unit 57, and the trimming unit 58, respectively. Driven. On the other hand, when the resin sheet S1 is conveyed, the sheet supply unit 51, the lower layer film supply unit 54, and the upper layer film supply unit 56 are driven. In addition, at the time of the operation | movement start of the manufacturing apparatus 50, the airtight container 1 is manufactured by starting operation | movement of each part sequentially according to arrival of the front-end | tip of the resin sheet S1 supplied.

  In addition, in the manufacturing apparatus 50 of the airtight container 1 of the said embodiment, the sheet supply part 51 and the shaping | molding part 52 do not necessarily need to be provided. At this time, the manufacturing apparatus 50 includes a filling unit 53, a lower film supply unit 54, a first bonding unit 55, an upper film supply unit 56, a second bonding unit 57, a trimming unit 58, and the like. In this case, the sealed container 1 is manufactured using a container body 10 separately formed from a resin sheet. Specifically, the manufacturing apparatus 50 includes a supply unit for the container body 10 on the upstream side of the filling unit 53. The supply unit has, for example, a take-out mechanism that sequentially takes out from the stacked container main body 10 and conveys it to the filling unit 53. Here, the separately formed container body 10 may be in an individual state, or may be in a state in which a plurality of accommodating portions 11 are connected by a flange portion 12.

  As described above, the sealed container 1 according to the present invention includes the container body 10 having the accommodating portion 11 and the flange portion 12 and the lid member 20, and the lid member 20 includes the upper layer lid 21 and the lower layer lid 21. A lid 22 is provided, and the lower layer lid 22 and the flange portion 12 are bonded to the entire periphery of the opening of the accommodating portion 11 (adhesive portion 23), the upper layer lid 21 is bonded to the lower layer lid 22, and the lower layer lid 22 is bonded to the lower layer lid 22. A part of the outer periphery of the housing part 11 is adhered (spot adhesion part 24) rather than the adhesion part 23, which is an adhesion part with the flange part 12. Accordingly, it is possible to peel the upper layer lid 21 and the lower layer lid 22 without opening the sealed container 1. Therefore, it is possible to display a lot of information by printing various information on at least one of the upper surface and the lower surface of the upper layer lid 21 and at least the upper surface of the lower layer lid 22.

  Further, since the upper layer lid 21 and the lower layer lid 22 are partially bonded to each other at the spot bonding portion 24, the bonding strength is weaker than that of the bonding portion 23 between the lower layer lid 22 and the flange portion 12. Therefore, a peeling layer is not required on the back surface of the upper layer lid 21 and an increase in the cost of the lid material can be suppressed. Here, since the upper layer lid 21 and the lower layer lid 22 are bonded without interposing a release layer, the adhesion strength of the spot bonding portion 24 may be increased partially, but the bonding area is small, The spot adhesive portion 24 can be reliably peeled without peeling off the linear adhesive portion 23 between the lower layer lid 22 and the flange portion 12. Of course, you may use the upper cover 21 which has a peeling layer.

    The embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the gist of the present invention.

  In addition, the shape of the airtight container 1 concerning this invention is not limited to a substantially cubic shape, A substantially rectangular parallelepiped shape may be sufficient, and the accommodating part 11 may be a column shape or an elliptical column shape. Further, the shape of the flange portion 12 is not limited to a substantially square shape, and may be a polygonal shape such as a substantially rectangular shape or a rhombus shape, or a circular shape or an oval shape. For example, even when the shape of the flange portion 12 is circular, the lower layer lid 22 and the flange portion 12 are bonded around the entire periphery of the opening of the accommodating portion 11, and the upper layer lid is formed on the outer peripheral side thereof. 21 and the lower layer lid 22 are partially bonded. At this time, the peeling start part 26 and the opening start part 27 are arranged to face each other with the accommodating part 11 in between in the diameter direction of the circular flange part.

  Further, the contents accommodated in the sealed container 1 are not limited to yogurt, and may contain foods such as tofu, jelly, menta, and steamed tea.

DESCRIPTION OF SYMBOLS 1 Airtight container 10 Container main body 11 Storage part 12 Flange part 20 Lid material 21 Upper layer cover 22 Lower layer cover 23 Bonding part

Claims (3)

A container body having a housing part whose upper end is open, a flange part projecting from the upper end of the housing part to the outer peripheral side, and a lid member that is bonded to the flange part to seal the housing part. A container,
The lid member is formed of a transparent member or a semi-transparent member, and includes an upper layer lid having a printing portion on at least one of the upper surface and the lower surface, and a lower layer lid having a printing portion on at least the upper surface,
The lower layer lid and the flange portion are bonded over the entire circumference of the opening of the housing portion, and the upper layer lid and the lower layer lid are bonded to each other than the bonding position between the lower layer lid and the flange portion. Adhering partially on the outer peripheral side of the housing part,
The lid material contains a peeling start portion for starting peeling of the upper layer lid and the lower layer lid, and an opening start portion for starting opening of the lid material by peeling of the lower layer lid and the flange portion. At a position facing each other across the part,
The opening start portion is arranged on the outer peripheral side of the housing portion with respect to the bonding portion between the lower layer lid and the flange portion, and the adhesive strength between the upper layer lid and the lower layer lid in the opening start portion is set to the lower layer lid. An airtight container characterized in that it is larger than the adhesive strength between the lid and the flange portion. The container body has a plurality of the accommodating portions and a flange portion that connects between the adjacent accommodating portions,
The sealed container according to claim 1, wherein a separable break portion is formed in a flange portion between the adjacent accommodating portions and the lid member bonded to the flange portion. It is a manufacturing method of the airtight container according to claim 1 or 2,
For the container body in which the housing part and the flange part are formed by molding the sheet-like resin material,
Supplying a lower layer film that covers the opening of the housing portion and constitutes the lower layer lid, and bonds the lower layer film and the flange portion to the entire periphery of the opening,
An upper layer film constituting the upper layer lid is supplied to the upper surface of the lower layer film, and the upper layer film and the lower layer film are partially bonded on the outer peripheral side with respect to the bonding point between the lower layer film and the flange portion. And
A method for manufacturing a sealed container, wherein a part of the flange portion is trimmed.

Images