Lid body, container with lid body, and assembly of lid body and container

Abstract

To provide a lid body, a container with the lid body, and an assembly of the lid body and the container excellent in stability of a lid-reclosed state capable of enduring load of the container in which contents are received and reducing leakage of contents in the lid-reclosed state well.SOLUTION: A lid body configured to allow a connection area connected to an upper end edge part comprising an outer side part from an end edge of an opening part of a container to be formed on the container having the opening part is provided with a body having a connection area corresponding part corresponding to the connection area. The body comprises: a first part defined as a rotational part to expose the opening part in a state the body is connected to the upper end edge part of the container; a second part excluding the first part; and a boundary part formed between the first part and the second part. A fragile part is formed in the boundary, a reinforcement member is provided to reinforce the boundary part, and the reinforcement member is arranged on the body so as to cross over the boundary part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a lid, a container with a lid, and a combination of a lid and a container. [Background technology]

[0002] Conventionally, in various stores such as supermarkets and convenience stores, it has been common practice to serve food and beverages in containers with the containers closed. In such stores, when serving food and beverages in containers, the products are usually displayed on shelves in advance, and customers look at the displayed products, select the product they want to purchase, and finally purchase it. When displaying products, it is also common to display multiple units of the same product. In such cases, the products are often stacked in multiple tiers.

[0003] Various types of lids used to close the opening of a container have been known. The lids are also made of a variety of materials, including film and paper. For example, Patent Document 1 (listed below) discloses a lid that is heat-sealed to a container and has a half-cut line formed in advance to allow for easy opening. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-337919 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when displaying products in stores, etc., it is common to stack products in multiple tiers. In this case, with the lid disclosed in the aforementioned Patent Document 1, when containers are stacked in multiple tiers for product display, there is a risk that the weight of the containers stacked above the lid, particularly the container at the bottom, may cause the half-cut line of the lid to break and open, leaving room for improvement. Furthermore, even when attempting to reclose the lid after opening it along the half-cut line (hereinafter, this state may be referred to as the "reclosed state"), the lid disclosed in Patent Document 1 is prone to losing its cover over the opening. Furthermore, even when the lid disclosed in Patent Document 1 is reclosed after cutting along the half-cut line to form an opening, a gap is likely to form between the lid and the opening, which can easily cause leakage of contents, especially liquids. Therefore, improvements are needed to improve the stability of the reclosed state when used with a lidded container.

[0006] The present invention has been made in consideration of the above points, and aims to provide a lid, a container with a lid, and a combination of a lid and a container that are highly stable when re-closed, can withstand the weight of a container containing contents, and can significantly reduce leakage of contents even when re-closed. [Means for solving the problem]

[0007] The present invention relates to the following (1) to (7).

[0008] (1) The container is formed so as to be able to form a joining region that is joined to an upper edge portion of a container having an opening, the upper edge portion being formed by a portion extending outward from the edge of the opening, a main body having a joint area corresponding portion corresponding to the joint area; the main body has a first portion defined as a portion that rotates to expose the opening when the main body is joined to the upper edge portion of the container, a second portion excluding the first portion, and a boundary portion formed between the first portion and the second portion; a weakened portion is formed at the boundary portion, a reinforcing member that reinforces the boundary portion is provided, The reinforcing member is provided on the main body so as to straddle the boundary portion. Lid body. (2) The lid body according to (1) above, wherein the reinforcing member is joined to the first portion of the main body. (3) The reinforcing member has an inner peripheral edge and an outer peripheral edge, and is provided on the main body so that, when provided on the main body, the width from the boundary portion to the outer peripheral edge is wider than the width from the boundary portion to the inner peripheral edge. The lid body according to (1) above. (4) The reinforcing member is formed in a shape that entirely covers the boundary portion. The lid body according to (1) above. (5) The lid according to (1) above, wherein the weakened portion has a half-cut structure. (6) The lid body described in (1) above, wherein the weakened portion has a structure in which through portions that penetrate the thickness direction of the main body and non-through portions that do not penetrate the thickness direction of the main body are formed alternately. (7) The lid according to (1) above, wherein the weakened portion is formed in a wavy shape. (8) A container having the opening and an upper edge formed by a portion outside the edge of the opening; The lid body according to any one of (1) to (7) above is provided. Container with lid. (9) A container having the opening and an upper edge formed by a portion outside the edge of the opening; and a lid body according to any one of (1) to (7) above. A combination of a lid and a container. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a lid, a container with a lid, and a combination of a lid and a container that are highly stable when re-closed, and can withstand the weight of a container containing contents and significantly reduce leakage of contents even when re-closed. [Brief explanation of the drawings]

[0010] [Figure 1] 1A and 1B are a front view and a rear view showing an embodiment of a lid according to the present invention. [Figure 2] FIG. 1 is a perspective view illustrating an embodiment of a lid according to the present invention. [Figure 3] FIG. 2 is an exploded perspective view showing an embodiment of a lid according to the present invention. [Figure 4] FIG. 2 is a front view illustrating the configuration of a lid according to the present invention. [Figure 5] 1 is a perspective view of a container with a lid using a lid according to the present invention. [Figure 6] 1 is a perspective view of a container with a lid using a lid according to the present invention. [Figure 7] 1 is a vertical cross-sectional view of a container with a lid using a lid according to the present invention. [Figure 8] FIG. 4 is an explanatory diagram for explaining a cross-sectional configuration of a guide portion. [Figure 9] 10A and 10B are explanatory diagrams for explaining a weak portion structure in a guide portion. [Figure 10] FIG. 10 is a perspective view showing a first modified example of the lid according to the present invention. [Figure 11] FIG. 10 is an exploded perspective view according to a first modified example. [Figure 12] FIG. 10 is a plan view showing a second modified example of the lid according to the present invention. [Figure 13] 10A and 10B are a plan view and a rear view showing a third modified example of the lid according to the present invention. [Figure 14] 10A and 10B are a plan view and a rear view showing a fourth modified example of the lid according to the present invention. [Figure 15] 10A and 10B are a plan view and a rear view showing a fifth modified example of the lid according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] The lid of the present invention will be described in detail with reference to the drawings. The lid of the present invention will be described as an example of a lid used for containers (cups) for holding food items such as prepared meals or rice balls. However, the lid is not limited to lids for food containers and can be used as a lid for containers that can hold various foods and beverages, such as coffee cups for various beverages. The lid of the present invention can also be used for containers that can hold various items other than food and beverages, such as parts such as bolts and nuts, or items other than those mentioned above. Furthermore, the lid of the present invention described below will be described using an example in which the shape of the lid is circular when viewed in plan. However, the shape of the lid is not limited to a circular shape when viewed in plan. It may be various shapes other than a circle, such as an ellipse, a polygonal shape such as a rectangle or a triangle, a chamfered rectangle, a chamfered polygon, etc.

[0012] Hereinafter, embodiments of the lid according to the present invention will be described in order with reference to the drawings. In this specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals, and redundant description will be omitted.

[0013] The following description is a preferred example of the present invention, and the content of the present invention is not limited to the embodiments. Furthermore, in the following description, directions such as front-back, left-right, and up-down, as well as directions on a horizontal plane, are shown for the sake of convenience, but the content of the present invention is not limited to these directions. In the examples of Figures 1 to 15, the Z-axis direction is defined as the up-down direction (upper side is the +Z direction, lower side is the -Z direction), the X-axis direction and the Y-axis direction are defined as directions along the X-axis and Y-axis, which are perpendicular to each other and defined on a plane normal to the Z-axis direction, and the XY plane, which is the plane defined by the X-axis and Y-axis, is defined as a horizontal plane. The description will be based on these. The relative magnitude ratios of sizes, etc. shown in each of Figures 1 to 15 are shown for convenience and do not limit the actual magnitude ratios.

[0014] (lid) The lid 1 according to this embodiment is used by being joined along an upper edge 103, which is specified as the portion extending outward from the edge of an opening 102 of a container 101. Therefore, the lid 1 is formed so as to be able to form a joining region R to be joined to the upper edge 103 of the container 101 having the opening 102. The lid 1 is also formed in a shape that allows it to be joined to the opening 102 of the container 101 (joined to the upper edge 103). As shown in FIG. 1 , the lid 1 has a joining region R to be joined to the upper edge 103 formed on the upper end side of the opening 102 of the container 101. FIG. 1 is a diagram showing one example of the lid 1. It is more preferable that the container 101 have flexibility at the edge of the opening 102. However, this does not prohibit the container 101 from being a container with little or no flexibility, such as a metal container.

[0015] (Lid material) The material of the lid body 1 is not particularly limited, but a paper-based material is preferred. Examples of paper-based materials include so-called paper, which is obtained by weaving a slurry of fiber raw material onto a screen, drying or pressing it, and then making it into a sheet; so-called airlaid sheets, which are obtained by pulverizing a raw material sheet made of pulp-based fibers in a pulverizer and then stacking spread fiber raw material such as ground pulp using an airflow and fixing the fibers of the stack with a binder; so-called papers manufactured by agglutinating plant fibers and other fibers; as well as chemical fiber paper, synthetic, waterproof, coated paper, substitute paper, parchment, wool paper, glass fiber paper, stone paper, ceramic paper, and the like; and materials made by laminating multiple sheets of these. Paper-based materials may be made solely of pulp or may contain non-pulp fibers such as natural fibers, synthetic fibers, and recycled fibers. However, paper materials preferably contain 50% by mass or more of pulp, more preferably 70% by mass or more, and even more preferably 80% by mass or more, with 100% by mass of pulp being particularly preferred. The paper-based material can be a composite material with synthetic or natural resin films or nonwoven fabrics, wood-based materials such as wood foil, or even aluminum foil. When a composite material is used, the composite material preferably contains 50% or more by mass of pulp, and more preferably 80% or more by mass of pulp. The higher the pulp content, the more easily the paper-based material is biodegraded, which is preferable.

[0016] It is preferable that the entire lid 1 be made of the above-mentioned paper-based material. Therefore, it is preferable that at least the main body 2 be made of a paper-based material. However, this does not prohibit the lid 1 from being partially or entirely made of a material other than a paper-based material. For example, the main body 2 of the lid 1 may be made of a laminate of a paper-based material and a resin film material. In this case, the lid 1 can be easily joined to the container 101 by appropriately using a sealing method such as a pressing method, a heat sealing method, or an ultrasonic welding method with the surface of the main body 2 on which the film material is arranged facing the container 101. In consideration of these points, the lid 1 is preferably also used as a laminate including a paper-based material. The main body 2 is also preferably also used as a laminate including a paper-based material.

[0017] As shown in Figures 1(a) and 1(b), the lid 1 has a main body 2. The main body 2 of the lid 1 includes a bonding region R. Figure 1 shows an embodiment of the lid 1, with Figure 1(a) being a plan view of the lid 1 seen from the front side and Figure 1(b) being a bottom view of the lid 1 seen from the back side.

[0018] (joint area) The joining region R indicates the region of the surface of the lid 1 that faces the opening 102 and is joined to the upper edge 103, which is specified as the portion extending outward from the edge 106 formed at the top end of the opening 102 of the container 101, when the lid 1 is attached to the upper edge 103. In addition, in the lid 1, the portion of the main body 2 that forms the joining region R is called a joining region corresponding portion 8. In the example of FIG. 1, the joining region R is shaped according to the opening 102 of the container 101 and is joined to the upper edge 103. 102. In this case, the joining area corresponding portion 8 is defined as an annular portion including the joining area R. If the joining area R between the lid 1 and the container 101 is not continuously joined, the portion sandwiched between adjacent joining areas R is also included in the joining area corresponding portion 8.

[0019] The width of the bonding region R (the width along the inward / outward direction) (i.e., the width of the portion 8 corresponding to the bonding region) is usually the same as or narrower than the width of the upper edge 103 of the opening 102. However, this does not prohibit the width of the bonding region R from being wider than the width of the upper edge 103 of the opening 102. In addition, the bonding region R may be formed inside the outer circumferential edge 71 of the main body 2, or may be formed up to the outer circumferential edge 71 of the main body 2.

[0020] In the example of FIG. 1, the inner edge of the bonding region R (i.e., the inner edge 8a of the portion 8 corresponding to the bonding region) is located slightly outside the edge of the opening 102 in the plan view of the lid 1 (i.e., in the plan view of the main body 2). However, this is just one example, and the inner edge may be located significantly outside of the edge 106 of the opening 102, or may be located directly above the edge 106 of the opening 102, or may be located inside of the edge 106 of the opening 102. Note that the plan view of the lid 1 refers to the case where the lid 1 is viewed from the +Z side toward the -Z side along the Z-axis in FIGS. 1A and 1B. The plan view of the main body 2 is also defined as the case where the main body 2 is viewed from the +Z side toward the -Z side, similar to the plan view of the lid 1.

[0021] In addition, in a plan view of the lid 1, the area of ​​the main body 2 inside the bonding area R is sometimes referred to as an inner area Rn. Furthermore, above the bonding area R indicates the upper surface side (exposed surface 70 side) of the part of the lid 1 corresponding to the bonding area R in a plan view of the lid 1.

[0022] (Main body) 7A, the main body 2 covers the opening 102 and the upper edge portion 103 when the lid 1 is attached over the opening 102 of the container 101. The main body 2 has a portion corresponding to the joining region R (jointing region corresponding portion 8), and has an outer portion 72 including the joining region R, and an inner portion 73 formed from the portion inward from the inner edge 72A of the outer portion 72. Regarding the inward and outward directions, the direction from the center CT of the main body 2 toward the outside is defined as the outward direction, and the direction from the outer peripheral edge 71 of the main body 2 toward the center CT is defined as the inward direction.

[0023] (outer part) In a plan view of the lid 1, the portion of the main body 2 that is outward from the inner edge of the joining region R (that is, the inner edge 8A of the portion 8 corresponding to the joining region) is referred to as an outer portion 72.

[0024] (Inner part) The inside of the bonding region R (i.e., the inside of the portion corresponding to the bonding region 8) in a plan view of the lid 1 refers to the portion of the lid 1 that forms the inside of the portion that forms the bonding region R. This portion is referred to as an inner portion 73.

[0025] (First and second parts) The main body 2 includes a first portion 3 and a second portion 4. In the example of FIG. 1 , a boundary portion 5 formed at the boundary between the first portion 3 and the second portion 4 includes a guide portion 6 and a hinge portion 7. The combination of the guide portion 6 and the hinge portion 7 can form a displacement-facilitating structure that facilitates rotation of the first portion 3.

[0026] (First part) The first portion 3 refers to a portion of the main body 2 that is defined as a portion that can be rotated upward to expose the opening 102 when the main body 2 is joined to the upper edge portion 103 of the container 101. Here, the rotation of the first portion 3 refers to the displacement of the first portion 3 so as to rotate around the hinge portion 7 (described later) as an axis. When the first portion 3 rotates, the shape of the first portion 3 may be deformed. The upward rotation of the first portion 3 can be achieved, for example, by lifting the first portion 3. The shape of the first portion 3 is not particularly limited, but in the example shown in FIG. 1A etc., it is formed in a roughly semicircular shape in a plan view of the lid 1. In this example, the first portion 3 is formed in the inner portion 73 (i.e., inside the joining region corresponding portion 8).

[0027] (Second part) The second portion 4 indicates the portion of the main body 2 excluding the first portion 3 .

[0028] (Boundary) In the main body 2, the boundary 5 indicates the portion defined as the boundary between the first portion 3 and the second portion 4 in the non-rotating state. The non-rotating state indicates a state of the main body 2 in which rotation of the first portion 3 relative to the second portion 4 is restricted. For example, the non-rotating state is a state in which the first portion 3 is not rotated when the lid 1 is not in use.

[0029] (Guide and hinge parts) The boundary portion 5 has a guide portion 6 and a hinge portion 7 .

[0030] The hinge portion 7 is determined as a portion that serves as the rotation axis of the first portion 3 when the upward displacement state is formed. The upward displacement state is specified as a state of the main body 2 in which the first portion 3 is rotated upward relative to the second portion 4. Rotating the first portion 3 upward includes not only rotating the first portion 3 in a direction along the surface direction of a plane that intersects perpendicularly with a horizontal plane (which in the example of FIG. 1A corresponds to the upper surface (exposed surface 70) of the main body 2 and corresponds to the XY plane stretched by the X-axis and Y-axis), but also rotating the first portion 3 in a direction along the surface direction of a plane that intersects obliquely with the horizontal plane.

[0031] The guide portion 6 determines the position where separation between the first portion 3 and the second portion 4 is intended to occur. The guide portion 6 is determined as a portion that defines the position where separation between the first portion 3 and the second portion 4 is intended to occur. In this embodiment, the guide portion 6 is formed in a wave shape when the lid body 1 is viewed from above.

[0032] (Information Department) In the example of FIGS. 1A and 1B, the guide portion 6 is specified as a portion of the boundary portion 5 that extends in a direction away from the hinge portion 7, with the ends of the hinge portion 7 (one end 7A, the other end 7B) as its base end. In this example, one end 6A of the guide portion 6 is connected to one end 7A of the hinge portion 7, and the other end 6B of the guide portion 6 is connected to the other end 7B of the hinge portion 7. The guide portion 6 is formed in a convex shape in a direction away from the hinge portion 7, has a front end 6C, and extends in a linear (curved) shape that is formed into a wave shape when the cover 1 is viewed from above. However, this is just an example, and the shape of the guide portion 6 is not limited to a convex shape. The guide portion 6 may also be formed in a shape other than the linear (curved) shape shown in FIG. 1A.

[0033] (Positional relationship between the guide part and the joining area) 1A, the guide portion 6 is formed inside the joining region R, i.e., formed on the inner portion 73. The guide portion 6 can be the portion where a separation structure between the first portion 3 and the second portion 4 is formed when the first portion 3 is rotated relative to the second portion 4.

[0034] (Positional relationship between guide and opening) 1A, the guide portion 6 is formed so as to be positioned generally along and slightly inward from directly above (the +Z direction side of) the edge 106 of the opening 102 of the container 101 when the lid 1 is joined to the container 101. However, this is just one example, and at least a part of the guide portion 6 may be positioned directly above the edge 106 of the opening 102, or may not be along the edge 106. The guide portion 6 may be positioned significantly further inward than the edge 106 of the opening 102 in a plan view of the lid 1. However, from the viewpoint of making it easier for the first portion 3 to come into contact with the inner circumferential surface 104A of the container 101 when the first portion 3 is rotated downward to form a downward displacement state, the guide portion 6 is preferably positioned directly above the edge 106 of the opening 102 or outward from the edge 106.

[0035] The structure of the guide portion 6 is not particularly limited, but is the weakened structure as described above. However, this does not restrict the guide portion 6 from having a structure other than the notched structure. For example, the guide portion 6 may have a notched structure.

[0036] In this specification, the incision structure refers to a slit-like structure that penetrates the entire container 101 from the non-facing surface (exposed surface 70) of the opening 102 to the opposing surface (back surface) when the lid 1 is attached to the container 101. The weakened structure refers to a structural portion, such as a perforated structure or half-cut structure, that requires less force to displace the structure than a portion without the structure. The perforated structure refers to a structure in which incisions that penetrate from the exposed surface 70 to the back surface and continuous portions that avoid the incisions are alternately formed. The half-cut structure refers to a structure (partial incision structure) in which partial incisions are formed in the material forming the main body 2 while avoiding penetration in the thickness direction. The half-cut structure does not particularly limit the depth of the incision in the material forming the main body 2. Figure 8 illustrates the incision depth of a half-cut structure from one end 6A of the guide portion to the other end 6B. Fig. 8(a) shows a configuration in which the depth of cut is constant from end 6A to end 6B, Fig. 8(b) shows a configuration in which the depth of cut varies unevenly from end 6A to end 6B, Fig. 8(c) shows a configuration in which the depth of cut is the same at end 6A and end 6B, the depth of cut is deepest at front end 6C, and the depth of cut gradually increases from end 6A to front end 6C and from end 6B to front end 6C, and Fig. 8(d) shows a configuration in which the depth of cut is deepest at end 6A and end 6B, the depth of cut is shallowest at front end 6C, and the depth of cut gradually decreases from end 6A to front end 6C and from end 6B to front end 6C. When forming guide portion 6 as a half-cut structure in this way, the depth of cut of the half-cut structure may be set arbitrarily. Furthermore, in the half-cut structure, when the notches are made from the exposed surface 70 side as shown in Fig. 9(a), the depth of the notches from the exposed surface 70 side may be determined arbitrarily as explained in Figs. 8(a) to 8(d). Furthermore, when the half-cut structure is such that the notches are made from the surface opposite the exposed surface 70 as shown in Fig. 9(b), the modes of the depth of the notches explained in Figs. 8(a) to 8(d) apply as modes of the depth of the notches from the surface opposite the exposed surface 70. Note that Fig. 9(c) shows a mode in which the guide portion 6 is formed to penetrate the main body 2 in the thickness direction.

[0037] The guide portion 6 may have a different structure in some parts. For example, a half-cut structure may be formed near the front end portion 6C of the guide portion 6, and a notched structure may be formed in other parts. When the vicinity of the front end portion 6C of the guide portion 6 is located in the joint area corresponding portion 8, even if the entire guide portion 6 has a notched structure, the joint structure (joint portion 151) between the container 101 and the lid 1 prevents the first portion 3 from opening unintentionally.

[0038] (hinge part) As shown in the examples of Figures 1A and 1B, the boundary portion 5 has a hinge portion 7. In this example, ends 7A and 7B of the hinge portion 7 are connected to ends 6A and 6B of the guide portion 6, respectively. The structure of the hinge portion 7 is not particularly limited as long as it is not a cut structure, and it may be a non-formed structure or a weakened structure. The non-formed structure refers to a portion in which the cut structure and the weakened structure are omitted. In other words, the non-formed structure here refers to a portion in which the main body 2 is configured so that the hinge portion 7 becomes apparent when the first portion 3 is rotated upward or downward.

[0039] When the lid 1 is in use, the first portion 3 is raised relative to the second portion 4. At this time, the first portion 3 and the second portion 4 separate generally along the guide portion 6, and the first portion 3 gradually rises while rotating relative to the second portion 4 around the hinge portion 7. From the viewpoint of smoothly forming the separation portion between the first portion 3 and the second portion 4, it is preferable that the hinge portion 7 has a weakened structure. However, this is just one example, and as described above, the hinge portion 7 may have no structure.

[0040] (Positional relationship between hinge part and joint area) 1A, the hinge portion 7 is formed inside the joining region R, that is, formed in the inner portion 73. However, this is just one example, and at least one end portion (7A, 7B) of the hinge portion 7 may be formed directly above the joining region R in a plan view of the lid 1, or may be formed outside the joining region R.

[0041] (Positional relationship between hinge and opening) 1A, ends 7A and 7B of hinge portion 7 are formed so as to be positioned approximately slightly inward of edge 106 of opening 102 of container 101 when lid 1 is joined to container 101. However, this is just one example, and at least one end (7A, 7B) of hinge portion 7 may be formed directly above edge 106 of opening 102, or may be formed at a position outside edge 106. From the viewpoint of making it easier for first portion 3 to come into contact with inner circumferential surface 104A of container 101 when first portion 3 is rotated downward to form a downward displacement state, ends 7A and 7B of hinge portion 7 are preferably positioned directly above edge 106 of opening 102 or outside edge 106 in a plan view of lid 1.

[0042] (Exposed mouth) 2, when first portion 3 is displaced, exposed opening 10 is formed, exposing space 105 from opening 102. When lid 1 is attached to opening 102 of container 101 in which liquid such as beverage or miso soup has been poured into space 105, a user can use exposed opening 10 of lid 1 as a drinking spout to ingest the liquid inside container 101.

[0043] (Tab member) As shown in the examples of FIGS. 1A and 1B, the cover 1 preferably has a tab member 21 attached to the first section 3. The attachment position and attachment direction of the tab member 21 on the first section 3 are not particularly limited. However, in the example of FIGS. 1A and 1B, the tab member 21 is joined to the first section 3 at a position near the tip (front end) of the first section 3 (i.e., near the front end 6C of the guide section 6). In this case, the joint between the tab member 21 and the first section 3 is referred to as a tab joint 22. In this example, the tab joint 22 is formed at one end 21A of the tab member 21. Also, in this example, the tab joint 22 is formed at a position near the tip of the first section 3. Examples of the method for joining the tab member 21 to the first section 3 (i.e., the method for forming the tab joint 22) include various methods such as ultrasonic bonding, heat sealing, and bonding with an adhesive. Of the above methods, ultrasonic bonding is preferred as the method for forming the tab joint 22 from the viewpoints of ease of bonding and bonding strength. From the viewpoint of making it easier to raise the first part 3 by lifting the tab member 21, the position where the tab joint 22 is formed in the first part 3 is preferably shifted from the center of the first part 3. From this viewpoint, the tab member 21 is preferably attached to the first part 3 at a position away from the hinge part 7 and away from the center of the main body 2. In other words, the tab member 21 is preferably attached to the first part 3 at a position closer to the tip end.

[0044] If the tab member 21 is joined to the first portion 3 at a position closer to the tip and further away from the hinge portion 7, the distance to the point of force on the hinge portion 7 (fulcrum) can be increased.

[0045] (Knob) 1A, one end 21A of the tab member 21 is joined to the first portion 3, and a gripping portion is formed at the other end 21B of the tab member 21. The shape and structure of the gripping portion 24 are not particularly limited as long as it is formed in a size and shape that allows the tab member 21 to be pinched.

[0046] (Tab member orientation (mounting direction)) In the example of Fig. 1A, the other end of the tab member 21 is positioned closer to the center of the main body than one end 21A of the tab member 21. However, this is just one example, and the orientation of the tab member may be in a direction other than that shown in the example of Fig. 1A. For example, the other end of the tab member may be positioned so as to face the outside of the main body than one end of the tab member.

[0047] (reinforcement part) In this embodiment, a reinforcing portion 31 is integrally formed with the tab member 21. The reinforcing portion 31 is intended to prevent force from being applied to the weakened structure formed in the guide portion 6. The reinforcing portion 31 is formed to extend from one end side of the tab member 21. The reinforcing portion 31 is formed to straddle the boundary portion 5 (guide portion 6) formed between the first portion 3 and the second portion 4. The reinforcing portion 31 is joined to the first portion 3 but not joined to the second portion 4, and is configured to be able to come into contact with them. In this embodiment, the reinforcing portion 31 is formed to entirely cover the guide portion 6, but it is sufficient that the reinforcing portion 31 is formed to cover at least a portion of the guide portion 6.

[0048] In the lid body of this embodiment formed in this manner, the weakened structure formed in the guide portion 6 is reinforced by the reinforcing portion 31, and the load on the guide portion 6 when a load is applied from above the lid body 1 is significantly reduced by the reinforcing portion 31. Therefore, for example, when a store displays lidded containers containing food or other contents on a shelf, even if the lidded containers are stacked, the reinforcing portion 31 reduces the force applied to the guide portion 6, thereby reliably preventing the weakened structure of the guide portion 6 from breaking and the lid from breaking before the product is served. Furthermore, when a product is served to a consumer, for example, if the consumer attempts to reclose the first portion 3 after opening the first portion 3 of the lid body, the reinforcing portion 31 comes into contact with the main body, so the first portion 3 stops in approximately the same position as the second portion 4. When the first portion 3 and the second portion 4 stop in the same position, the fibers exposed on the end surface of the first portion 3 and the fibers exposed on the end surface of the second portion 4 rub against each other, easily generating frictional resistance between them. This makes it easier to maintain the re-closed state, and the user can feel secure when carrying the container in the re-closed state.

[0049] FIGS. 10 and 11 show a first modified example of the lid according to the present invention. In this example, the guide portion 6 is formed in a circular shape rather than a corrugated shape. FIG. 12 shows a second modified example, in which a window portion 41 is provided in the center of the main body 2. The size, shape, and location of the window portion 41 may be set arbitrarily and are not limited to the example shown in FIG. 12. FIG. 13 shows an example in which the tab member 21 and the reinforcing portion 31 are formed separately. Furthermore, FIG. 14 shows a lid in which an extension portion is formed on the tip side of the first portion 3, and a grip portion is formed on this extension portion, and an opening is formed when the user grips and pulls up the grip portion. FIG. 15 shows an example in which the tab member 21 is formed to protrude beyond the outer periphery of the main body 2.

[0050] Although the lid according to the present invention has been described above, the above description is merely an example of the lid according to the present invention and is not limited to the matters described in the embodiment. Therefore, any setting may be made within the scope of the gist of the present invention. [Explanation of symbols]

[0051] 1 Lid 2 Main unit 3. First Part 4. Second Part 5 Boundary 6 Information Department 7 Hinge part 8. Joint area 10 Exposed mouth 21 Tab member 31 Reinforcement

Claims

1. The adhesive layer is formed so that it can form a joining region that is joined to an upper edge portion of a container having an opening, the upper edge portion being an outer portion of the edge of the opening, a main body having a joint area corresponding portion corresponding to the joint area; the main body has a first portion defined as a portion that rotates to expose the opening when the main body is joined to the upper edge portion of the container, a second portion excluding the first portion, and a boundary portion formed between the first portion and the second portion; a weakened portion is formed at the boundary portion, a reinforcing member that reinforces the boundary portion is provided, The reinforcing member is provided on the main body so as to straddle the boundary portion. Lid body.

2. The lid according to claim 1 , wherein the reinforcing member is joined to the first portion of the main body.

3. The reinforcing member has an inner peripheral edge and an outer peripheral edge, and is provided on the main body such that, when provided on the main body, the width from the boundary portion to the outer peripheral edge is wider than the width from the boundary portion to the inner peripheral edge. The lid according to claim 1 .

4. The reinforcing member is formed in a shape that entirely covers the boundary portion. The lid according to claim 1 .

5. The lid according to claim 1 , wherein the weakened portion has a half-cut structure.

6. The lid according to claim 1 , wherein the weakened portion has a structure in which through portions that penetrate the body in the thickness direction and non-through portions that do not penetrate the body in the thickness direction are formed alternately.

7. The lid according to claim 1 , wherein the weakened portion is formed in a wavy shape.

8. a container having the opening and an upper edge formed by a portion outside the edge of the opening; The lid body according to any one of claims 1 to 7, Container with lid.

9. a container having the opening and an upper edge formed by a portion outside the edge of the opening; and a lid according to any one of claims 1 to 7. A combination of a lid and a container.

Images