JP7039449B2 - A lid and a container with a lid - Google Patents

Description

The present invention relates to a lid and a container including the lid.

As a technique relating to a container for food, the technique described in Patent Document 1 is known. The container described in Patent Document 1 includes a container body and a lid. The lid is provided with a notch to allow the steam generated when the container containing the food is heated to escape. The notch is configured in the shape of a tongue piece. In the technique of the same document, the notch itself is configured as a reinforcing rib. According to this technique, the notch piece is prevented from bending toward the container body side.

Utility Model Registration No. 3138601

By the way, the notch piece provided in the lid may be bent toward the container body side or may be bent toward the side opposite to the container body side. In either case, there is a risk of foreign matter entering the food container. In the case of the technique described in Patent Document 1, the cut piece may be bent to the side opposite to the container main body side. If the notch is bent, foreign matter may enter. Conventionally, the entire food container is wrapped in film as a measure against foreign matter intrusion, but in recent years, there has been a tendency to reduce the number of films from the viewpoint of resource saving. Therefore, a lid body in which deformation of the cut piece is suppressed and a container provided with the lid body are provided.

(1) The lid that solves the above problems is a lid that covers the opening of the container body, and the lid reinforces the notch, the notch having the notch as an edge, and the notch. It has a rib to be formed and a surface portion provided on the notch piece and adjacent to the rib, and the notch has a notch length of L1 and is a straight line connecting the first end and the second end of the notch. When the length is L2, the notch has a relationship of L1> L2, the rib is provided between the first end and the second end of the notch, and the face portion is the notch. It is provided at least one of the portion between the first end and the rib and the portion between the second end and the rib of the notch.

According to this configuration, the rib and the surface portion provided around the rib reinforce the cut piece, so that the elasticity of the cut piece is increased and the deformation of the cut piece is suppressed. The deformation of the cut piece means a state in which the cut piece does not return to the initial position before the deformation after the deformation of the cut piece.

(2) The lid has a recess that is recessed downward in the direction from the lid toward the container body in a fitted state in which the lid is fitted to the container body, and the bottom wall of the recess has a recess. The notch, the rib and the surface portion are provided, and the rib is configured so as to project upward in a direction opposite to the lower direction and the height dimension of the rib is smaller than the depth dimension of the recess. Will be done.

According to this configuration, when the shrink film is attached to the lid so as to cover the recess, the ribs do not come into contact with the shrink film. Therefore, the shrink film does not push down the ribs, so that no gap is formed in the notch or the gap between the notches is not widened.

(3) In the lid, one rib is provided between the first end and the second end of the notch, and the surface portion of the rib has a constant width and follows the notch. It is provided around. According to this configuration, the elasticity of the notch piece is further increased, and the deformation of the notch piece is further suppressed.

(4) In the lid body, the notch is U-shaped. When the notch piece has a corner portion, deformation may occur at the corner portion and a gap may be formed at the corner portion during the manufacturing of the notch. On the other hand, according to this configuration, since the cut is U-shaped and the cut piece has no corners, the formation of a gap due to deformation is suppressed.

(5) In the lid, when the lid is viewed from the lid toward the container body, the ribs intersect a straight line connecting the first end and the second end of the notch. The rib has a first portion on the notch side of the straight line and a second portion other than the first portion, and the length of the second portion is the first portion. Longer than the length of the part.

The notch piece is liable to break in a straight line connecting the first end and the second end of the notch. If the length of the second portion is short, the cut piece may break at the rib end on the second portion side. In this respect, according to the above configuration, since the length of the second portion is longer than the length of the first portion, the periphery of the straight line connecting the first end and the second end of the notch and the rib end on the second portion side. The risk of breaking around the part is reduced. In this way, the deformation of the notch piece and the deformation around the notch piece are suppressed, so that a gap is suppressed in the notch.

(6) The container that solves the above problems includes any of the above lids and the container body. According to this configuration, deformation of the notch piece is suppressed in the lid of the container.

According to the lid and the container provided with the lid, the deformation of the notch piece is suppressed.

Perspective view of the container. Sectional drawing of the container along line II-II of FIG. Top view of the notch and its surroundings. (A) Schematic diagram of the first modification of the notch, (b) Schematic diagram of the second modification of the notch. The schematic diagram of the 3rd modification of the notch. (A) Schematic diagram of the fourth modification of the notch, (b) Schematic diagram of the fifth modification of the notch. (A) Schematic diagram of the sixth modification of the notch, (b) Schematic diagram of the seventh modification of the notch. The schematic diagram of the 8th modification of the notch. The schematic diagram of the 9th modification of the notch. (A) Cross-sectional view of the rib along the XX line of FIG. 3, (b) Cross-sectional view of the first modified example of the rib, and (c) Cross-sectional view of the second modified example of the rib. (A) Cross-sectional view of the third modified example of the rib, (b) Cross-sectional view of the fourth modified example of the rib. Sectional drawing of the 5th modification of a rib. (A) Cross-sectional view of the sixth modification of the rib, (b) Cross-sectional view of the seventh modification of the rib. Sectional drawing of the 8th modification of a rib. (A) A plan view of a ninth modification of the rib, and (b) a plan view of a tenth modification of the rib. (A) A plan view of the eleventh modification of the rib, and (b) a plan view of the twelfth modification of the rib. (A) Side view of the thirteenth modification of the rib, (b) side view of the fourteenth modification of the rib. (A) Side view of the 15th modification of the rib, (b) Side view of the 16th modification of the rib. Top view showing the arrangement of additional ribs. The plan view which shows the 17th modification of a rib.

The container will be described below. Containers are used to store food. The container can be heated by a microwave oven. For example, the container is heated with food in it. Examples of the food contained in the container 1 include rice, noodles, side dishes of rice, curry, stew and the like.

As shown in FIGS. 1 and 2, the container 1 includes a container body 2 and a lid 10 that covers the opening 2a of the container body 2. In the following description, the direction along the vertical direction when the container 1 is placed on a horizontal plane is referred to as the vertical direction of the container 1. "Lower" is the direction from the lid 10 toward the container body 2 in the fitted state in which the lid 10 is fitted to the container body 2. "Upper" is the opposite direction of the lower direction.

The lid 10 fits into the container body 2. When the container 1 is heated in a state where the food is housed in the container 1 and the lid 10 is fitted to the container body 2, steam is generated from the food and the pressure in the container 1 rises. The lid 10 is fitted to the container body 2 so as not to be removed by steam. The steam is escaped from the notch piece 23, which will be described later, provided in the lid 10.

The container body 2 is made of various synthetic resins, paper, and the like. Examples of the synthetic resin include polystyrene-based resins, polyolefin-based resins such as polyethylene-based resins and polypropylene-based resins, polyester-based resins such as polyethylene terephthalate-based resins and polyethylene furanoate-based resins, and the like. As the polystyrene-based resin, in order to improve heat resistance, it is preferable to contain 80 parts by mass or less of the polyphenylene ether-based resin with respect to 100 parts by mass of the polystyrene resin. Examples of the paper include thick paper, water resistant paper in which a synthetic resin film is laminated on thick paper, and the like. The container body 2 is preferably formed of a foamed synthetic resin in order to improve lightness and heat insulating properties. Examples of the foamed synthetic resin include foamed polystyrene-based resins such as foamed polystyrene-based resins, foamed polyethylene-based resins and foamed polypropylene-based resins, foamed polyester-based resins such as foamed polyethylene terephthalate-based resins and foamed polyethylene furanoate-based resins, and the like. Be done. It is preferable to laminate a synthetic resin film on at least one surface of the foamed synthetic resin in order to improve impact resistance and designability. The container body 2 has a bottom wall 3, a side wall 4 provided around the bottom wall 3, and a container-side fitting portion 5 provided around the side wall 4. The upper side of the container-side fitting portion 5 is the opening 2a. The lid-side fitting portion 13 of the lid 10 is fitted to the container-side fitting portion 5. The fitting method exemplified in FIGS. 1 and 2 is an internal fitting method. Although not illustrated, the outer fitting method or the inner / outer fitting method may be used.

The lid 10 is formed of various synthetic resins. Examples of the synthetic resin include polystyrene-based resins, polyolefin-based resins such as polyethylene-based resins and polypropylene-based resins, polyester-based resins such as polyethylene terephthalate-based resins and polyethylene furanoate-based resins, and the like. The lid 10 is preferably transparent in order to improve the visibility of the food contained in the container body 2.

The lid 10 has a notch 20, a notch 23 having the notch 20 as an edge, a rib 25 for reinforcing the notch 23, and a surface portion 30 provided on the notch 23 and adjacent to the rib 25. ..
The notch 20 is formed by shearing. For example, the notch 20 is formed by pressing with a pressing device including a male mold and a female mold. The notch piece 23 is a valve that allows steam to escape, as described above. The notch 20 is closed when no vapor pressure is applied to the lid 10. When steam pressure is applied to the lid 10, the cut piece 23 is lifted and a gap is formed in the cut 20. The steam goes out of the container 1 through this gap.

An example of the lid 10 will be given with reference to FIG. The lid 10 includes a top surface portion 11, a side surface portion 12 provided around the top surface portion 11, and a lid-side fitting portion 13 provided around the side surface portion 12. The lid-side fitting portion 13 is configured to fit into the container-side fitting portion 5.

Preferably, the top surface portion 11 is provided with a recess 15. The recess 15 has a bottom wall 16 and a side wall 17 surrounding the bottom wall 16. The recess 15 is recessed downward. The bottom wall 16 of the recess 15 is provided with a notch 20, a rib 25 and a face portion 30.

Preferably, one or a plurality of grooves 18 are provided around the recess 15 in the top surface portion 11. The groove 18 extends from the recess 15 toward the side surface portion 12 of the lid 10. The groove 18 serves as a steam discharge passage. For example, the recess 15 and the portion of the groove 18 on the recess 15 side are covered with the shrink film 7. The portion of the groove 18 on the side surface portion 12 side is open. The steam discharged from the notch 20 of the recess 15 is discharged to the outside through the recess 15 and the groove 18.

As shown in FIG. 3, the notch 20 includes a first end 21, a second end 22, a first cut surface 20a connecting the first end 21 and the second end 22, and the first end 21 and the second end. It has a second cut surface 20b that connects to the end 22. The first cut surface 20a is a surface constituting the end surface on the cut piece 23 side. The second cut surface 20b is a surface formed together with the first cut surface 20a when the cut 20 is formed. As described above, the notch 20 is closed when no vapor pressure is applied to the lid 10. Hereinafter, the line of intersection between the first cut surface 20a and the upper surface of the lid 10 is referred to as a “cut line 24”. In the present embodiment, the upper surface of the lid 10 includes the upper surface 16a of the bottom wall 16 of the recess 15. The state in which the cut 20 is closed means that at least a part of the first cut surface 20a is in contact with the second cut surface 20b, or at least a part of the face portion 30 of the cut piece 23 is the lid body 10. Shows a state having the same plane height as the upper surface of the above. Examples of the method for forming the notch 20 include a method of forming by shearing of a pressing device, a forming by pushing and cutting of a cutting blade, and a method of forming by melting a laser beam. The shear formation of the press device has almost no gap between the first cut surface 20a and the second cut surface 20b (the shortest distance of the gap is preferably 0.1 mm or less, more preferably 0.05 mm or less). This is a more preferable forming method because at least a part of the first cut surface 20a can be formed in contact with the second cut surface 20b and foreign matter can be prevented from entering. The formation by pushing the cutting blade and the formation by melting the laser beam cause a slight gap between the first cutting surface 20a and the second cutting surface 20b, but the shortest distance of the gap is preferably 1.0 mm or less. It is preferably 0.5 mm or less, more preferably 0.25 mm or less, because it is possible to prevent the invasion of foreign matter, which is a preferable forming method.

The cut length L1 (see FIG. 3) indicates the length along the cut line 24. When the notch length is L1 and the length of the straight line connecting the first end 21 and the second end 22 of the notch 20 (hereinafter, the straight line lengths at both ends) is L2, the notch 20 has a relationship of L1> L2. Have. "The length of the straight line connecting the first end 21 and the second end 22 (straight line length at both ends) L2" is the length of the straight line connecting the first end 21 and the second end 22 in the three-dimensional space by the shortest path. Shows. The shape of the notch 20 is configured so that the notch piece 23 can be lifted by steam pressure. In this embodiment, the notch 20 is U-shaped.

The cut length L1 is preferably 5 mm or more and 100 mm or less. More preferably, the cut length L1 is 10 mm or more and 80 mm or less, and more preferably 20 mm or more and 60 mm or less. The straight line length L2 at both ends is preferably 3 mm or more and 50 mm or less. More preferably, the straight line length L2 at both ends is 5 mm or more and 40 mm or less, and more preferably 7 mm or more and 30 mm or less.

The rib 25 is provided between the first end 21 and the second end 22 of the notch 20. A plurality of ribs 25 may be provided between the first end 21 and the second end 22 of the notch 20. In this embodiment, one rib 25 is provided between the first end 21 and the second end 22 of the notch 20.

Specifically, when the lid 10 is viewed in the direction from the lid 10 toward the container body 2 (plan view), the rib 25 becomes a straight line LX connecting the first end 21 and the second end 22 of the notch 20. Extend to intersect. The rib 25 has a first portion 26 on the notch 20 side of the straight line LX connecting the first end 21 and the second end 22, and a second portion 27 which is a portion other than the first portion 26. For example, the length of the second portion 27 with respect to the total length of the rib 25, that is, the “length of the second portion 27” / “total length of the rib 25” is preferably 0.1 or more and 0.9 or less. More preferably, the "length of the second portion 27" / "total length of the rib 25" is 0.2 or more and 0.8 or less, and more preferably 0.3 or more and 0.7 or less. In this embodiment (see FIG. 3), the length of the second portion 27 is longer than the length of the first portion 26. In another example (see FIGS. 6 (b), 7 (a), and 9), the length of the second portion 27 is shorter than the length of the first portion 26.

The rib 25 is configured as a portion protruding with respect to the peripheral portion of the rib 25 or a portion recessed with respect to the peripheral portion of the rib 25. In this embodiment, the rib 25 projects upward. Preferably, the height dimension L4 of the rib 25 is smaller than the depth dimension L3 of the recess 15.

The width L6 of the rib 25 is preferably 1 mm or more and 49 mm or less. More preferably, the width L6 of the rib 25 is 3 mm or more and 37 mm or less, and more preferably 5 mm or more and 25 mm or less. The length L5 of the rib 25 is preferably 1 mm or more and 80 mm or less. More preferably, the length L5 of the rib 25 is 2 mm or more and 60 mm or less, and further preferably 4 mm or more and 40 mm or less.

The depth dimension L3 of the recess 15 is preferably 1 mm or more and 10 mm or less. The height dimension L4 of the rib 25 is preferably 0.5 mm or more and 8 mm or less. Further, the height dimension L4 of the rib 25 is preferably smaller than the depth dimension L3 of the recess 15. The depth dimension L3 of the recess 15 is more preferably 2 mm or more and 8 mm or less. The height dimension L4 of the rib 25 is more preferably 1 mm or more and 6 mm or less. Further, it is more preferable that the height dimension L4 of the rib 25 is lower than the depth dimension L3 of the recess 15. The difference obtained by subtracting the "height dimension L4 of the rib 25" from the "depth dimension L3 of the recess 15" is preferably 0.5 mm or more and 9.5 mm or less, and more preferably 1 mm or more and 7 mm or less.

The face portion 30 is provided at least one of a portion between the first end 21 of the notch 20 and the rib 25 and a portion between the second end 22 of the notch 20 and the rib 25. Preferably, the face portion 30 is provided around the rib 25 with a constant width along the notch 20. Here, the constant width means that the ratio of the maximum length to the minimum length is 4 or less for the width dimension from the rib 25 to the notch 20. The minimum length of the width dimension of the surface portion 30 is preferably 0.5 mm or more and 20 mm or less, more preferably 1.0 mm or more and 10 mm or less, and more preferably 1.5 mm or more and 5 mm or less.

The surface portion 30 is configured such that the upper surface of the surface portion 30 and the upper surface 16a of the bottom wall 16 of the recess 15 are flush with each other. The surface portion 30 may be an inclined surface that is inclined with respect to the vertical direction. Further, the surface portion 30 may be a curved surface. When both the side wall of the face portion 30 and the rib 25 are plate-shaped, a bent portion 31 is provided between the side wall of the rib 25 and the face portion 30. The bent portion 31 reinforces the cut piece 23 together with the rib 25. When the face portion 30 has a curved structure, the face portion 30 itself reinforces the cut piece 23.

The size and shape of the notch 20, the size and shape of the rib 25, and the size and shape of the face portion 30 (hereinafter, these are referred to as "forms such as the notch 20") shall satisfy the following two requirements. It is composed of. First, the notch 20 and the like are configured such that the notch piece 23 is placed in the initial position when no vapor pressure is applied to the lid 10. The initial position indicates the position of the cut piece 23 when the first cut surface 20a comes into contact with the second cut surface 20b. Secondly, the notch 20 and the like are configured so that the notch piece 23 is lifted by the steam pressure. Specifically, the following information (a) to (f) is reflected in the design of the form such as the notch.

(A) The larger the area of the surface portion 30, the easier it is for the cut piece 23 to be lifted by the vapor pressure. (B) The longer the cut length L1, the easier it is for the cut piece 23 to be lifted by the vapor pressure. (C) Regarding the point P (see FIG. 3) where the following three-point distance is the largest among the points on the cut line 24, the longer the three-point distance (maximum three-point distance) at the point P, the more the vapor pressure causes. The cut piece 23 is easy to lift. The three-point distance indicates the total distance between the first distance between the point on the cut line 24 and the first end 21 and the second distance between the point on the cut line 24 and the second end 22. .. In the following, the three-point distance at the point P where the three-point distance is the largest among the points on the cut line 24 is referred to as "maximum three-point distance". (D) The higher the height dimension L4 of the rib 25, the easier it is for the cut piece 23 to return to the initial position. (E) The longer the length of the second portion 27 of the rib 25, the easier it is for the cut piece 23 to return to the initial position. (F) When the angle between the side surface 25a of the rib 25 and the surface portion 30 is larger than 90 degrees or smaller than 90 degrees, the cut piece 23 returns to the initial position as the angle approaches 90 degrees. Cheap. The maximum three-point distance is preferably 4 mm or more and 90 mm or less. More preferably, the maximum three-point distance is 9 mm or more and 70 mm or less, and more preferably 17 mm or more and 55 mm or less.

[Example]
An example of the dimensions of the notch 20 and the rib 25 of the embodiment is shown below.
The cut length L1 (see FIG. 3) is 30 mm. The straight line length L2 at both ends (see FIG. 3) is 14 mm. The minimum length of the width dimension from the rib 25 to the notch 20 is 2 mm. The maximum three-point distance is 26 mm. The length L5 of the rib 25 (see FIG. 3) is 22.5 mm. The ratio of the length of the second portion 27 to the total length (L5) of the rib 25 is 0.6. The width L6 of the rib 25 (see FIG. 3) is 10 mm. The height dimension L4 (see FIG. 2) of the rib 25 is 2 mm. The depth dimension L3 (see FIG. 2) of the recess 15 is 5 mm.

Hereinafter, the operation of the embodiment will be described.
The notch 20 is formed by shearing the press device. When the notch 20 is formed, the notch piece 23 is displaced to the female mold side with respect to the circumference of the notch 20. At the time of formation, the notch piece 23 is pushed back to the male mold side by the push-back spring of the press device, so that most of the notch pieces 23 are in the same position (initially) around the notch 20 in the shear direction (same as the press direction). Return to position). However, when the notch piece 23 is plate-shaped, it becomes bent at a portion along the line connecting the first end 21 and the second end 22 of the notch 20, and is in a bent state with the periphery of the notch piece 23 in the shearing direction. It may not return to the same position (initial position). When the notch piece 23 is deformed so as not to return to the same position as the periphery of the notch piece 23, the gap of the notch 20 is not closed and the notch 20 is maintained in an open state. If there is a gap in the notch 20, foreign matter may enter the container 1.

In this embodiment, the rib 25 is arranged between the first end 21 and the second end 22 of the notch 20. The rib 25 is provided so as to extend over the notch piece 23 and the peripheral portion of the notch piece 23 (hereinafter, “rib extension structure”). The rib extension structure increases the elasticity of the notch piece 23 in the movable direction DT of the notch piece 23. The movable direction DT is equal to the shearing direction. Further, a face portion 30 is provided between the rib 25 and the notch 20 (hereinafter, “face portion structure”). The face portion 30 increases the restoring force for returning to the original shape from the deformation of the cut piece 23 as compared with the cut piece 23 having no face portion 30. For example, even if the cut piece 23 is twisted or bent by an external force, the cut piece 23 returns to its original shape when the external force is released. As described above, according to the rib extension structure and the surface portion structure, the self-returning action of returning to the initial position becomes large. Therefore, after the cut piece 23 is displaced in the movable direction DT, the cut piece 23 tends to return to the same position (initial position) as the peripheral portion of the cut piece 23.

For example, at the time of forming the notch piece 23, the notch piece 23 is pushed by the male mold and displaced to the female mold side, but self-recovery based on the action of the push-back spring of the press device and the rib extension structure and the surface structure. By the action, the cut piece 23 returns to the same position (initial position) as the circumference of the cut 20 in the shearing direction (same as the pressing direction). In this way, the deformation that the cut piece 23 is fixed in the state where the cut piece 23 is displaced in the movable direction DT is suppressed.

When the container 1 is heated while the food is contained, the cut piece 23 operates as follows. When steam pressure is applied to the lid 10, the cut piece 23 is displaced upward by the steam pressure. After that, when the vapor pressure drops, the cut piece 23 returns to the initial position due to the self-recovery action of self-recovery.

Hereinafter, the effects of the embodiments will be described.
(1) The lid 10 has a notch 20, a notch piece 23 having the notch 20 as an edge, a rib 25 for reinforcing the notch piece 23, and a surface portion 30 provided on the notch piece 23 and adjacent to the rib 25. And have. The rib 25 is provided between the first end 21 and the second end 22 of the notch 20. The face portion 30 is provided at least one of a portion between the first end 21 of the notch 20 and the rib 25 and a portion between the second end 22 of the notch 20 and the rib 25.

According to this configuration, the rib 25 and the surface portion 30 provided around the rib 25 reinforce the cut piece 23, so that the elasticity of the cut piece 23 is increased and the deformation of the cut piece 23 is suppressed. The deformation of the cut piece 23 means a state in which the cut piece 23 does not return to the initial position before the deformation after the deformation of the cut piece 23.

(2) The lid 10 has a recess 15 that is recessed downward. The bottom wall 16 of the recess 15 is provided with a notch 20, a rib 25 and a face portion 30. The rib 25 is configured so as to project upward and the height dimension L4 of the rib 25 is smaller than the depth dimension L3 of the recess 15.

According to this configuration, when the shrink film 7 is attached to the lid 10 so as to cover the recess 15, the rib 25 does not come into contact with the shrink film 7. Therefore, the rib 25 is not pushed down by the shrink film 7, and no gap is formed in the notch 20, or the gap in the notch 20 is not expanded. Further, when the container 1 in which the food is contained is heated, the lifting of the cut piece 23 is not hindered. As a result, the steam generated from the food when the container 1 containing the food is warmed can be smoothly released to the outside through the cut piece 23.

(3) One rib 25 is provided between the first end 21 and the second end 22 of the notch 20. The face portion 30 is provided around the rib 25 with a constant width along the notch 20. According to this configuration, the elasticity of the notch piece 23 is further increased, and the deformation of the notch piece 23 is further suppressed.

(4) The notch 20 is, for example, U-shaped. When the cut piece 23 has a corner portion, the cut portion 20 may be deformed at the corner portion and a gap may be formed at the corner portion during the manufacturing of the cut portion 20. On the other hand, according to this configuration, since the notch 20 is U-shaped and the notch piece 23 has no corner portion, the formation of a gap due to deformation is suppressed.

(5) When the lid 10 is viewed from the lid 10 toward the container body 2, the rib 25 extends so as to intersect the straight line LX connecting the first end 21 and the second end 22 of the notch 20. The rib 25 has a first portion 26 on the notch 20 side of the straight line LX, and a second portion 27 which is a portion other than the first portion 26. The length of the second portion 27 is longer than the length of the first portion 26.

The cut piece 23 is easily broken in the straight line LX connecting the first end 21 and the second end 22 of the cut 20. If the length of the second portion 27 is short, the cut piece 23 may break at the rib end portion on the second portion 27 side. In this regard, according to the above configuration, since the length of the second portion 27 is longer than the length of the first portion 26, the periphery of the straight line LX connecting the first end 21 and the second end 22 of the notch 20 and the second portion The risk of breaking around the rib end on the 2nd portion 27 side is reduced. In this way, the deformation of the cut piece 23 and the deformation of the periphery of the cut piece 23 are suppressed, so that a gap is suppressed in the cut piece 20.

(6) The container 1 includes a lid 10 shown in the embodiment and a container body 2. The lid 10 has at least the configuration of (1) above. According to this configuration, the deformation of the cut piece 23 is suppressed in the lid 10 of the container 1.

<Other embodiments>
This embodiment can be modified and implemented as follows. The present embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

-The notch 20 is not limited to the U shape.
As shown in FIG. 4A, the notch 41 may have a shape having two obtuse-angled corner portions 41a and 41a in a plan view. As shown in FIG. 4B, the notch 42 may have a shape having two acute-angled corner portions 42a and 42a in a plan view. As shown in FIG. 5, the notch 43 may be V-shaped in plan view. The V-shape may have a sharp tip or may be rounded.

As shown in FIG. 6A, the notch 44 may be an arc having a center angle of 180 degrees or more in a plan view.
As shown in FIG. 6B, the notch 45 may be a curve composed of a plurality of arcs in a plan view. For example, the notch 45 includes a first arc 45a having a center angle of 180 degrees or more, and two second arcs 45b and 45b connected to both ends of the first arc 45a. In this example, the center of the second arc 45b is arranged outside the first arc 45a.

As shown in FIG. 7A, the notch 46 may be a curve composed of a plurality of arcs and a plurality of straight lines. For example, the notch 46 includes a first arc 46a, two straight lines 46b extending from both ends of the first arc 46a, and two second arcs 46c connected to each of the two straight lines 46b. In FIG. 7A, the two straight line portions 46b are arranged so that the distance between the two straight line portions 46b increases from the second arc 46c toward the first arc 46a. As shown in FIG. 7B, the notch 47 has a first arc 47a, two straight portions 47b extending from both ends of the first arc 47a, and two second portions connected to each of the two straight portions 47b. It has an arc 47c. In FIG. 7B, the two straight portions 47b are parallel.

As shown in FIG. 8, the notch 48 may be a curve composed of two arcs 48a and 48b. The opening direction of one arc 48a is opposite to the opening direction of the other arc 48b. In the case of such a notch 48, it is preferable that the rib 25 is provided for each of the arcs 48a and 48b.

As shown in FIG. 9, the notch 49 may be provided in the unevenness. For example, a plurality of convex portions 50 or concave portions are arranged around the rib 25. The plurality of protrusions 50 or recesses are arranged in a U shape. A notch 49 is provided in the arranged convex portions 50 or concave portions.

The cross-sectional shape of the rib 25 is not limited. FIG. 10A is a cross-sectional view of the rib 25 shown in the above embodiment. 10 to 14 are cross-sectional views of ribs 51 to 58 cut at the same locations as the X-rays shown in FIG.

As shown in FIG. 10B, the cross section of the rib 51 may have a shape that spreads downward. The distance between the pair of side walls 51a of the rib 51 increases downward. As shown in FIG. 10 (c), the cross section of the rib 52 may have an upwardly pointed shape. As shown in FIG. 11A, the cross section of the rib 53 may have an upwardly rounded shape. As shown in FIG. 11B, the cross section of the rib 54 may have a semi-elliptical shape rounded upward.

As shown in FIG. 12, the cross section of the rib 55 may have a shape having two convex portions 55a and 55a. As shown in FIG. 13A, the cross section of the rib 56 may have a shape having one convex portion 56a and one concave portion 56b. As shown in FIG. 13B, the cross section of the rib 57 may have one convex portion 57a and one concave portion 57b. The convex portion 57a and the concave portion 57b are formed on a curved surface. As shown in FIG. 14, the cross section of the rib 58 may have a shape having one convex portion 58a, one concave portion 58b, and a surface portion 58c connecting the convex portion 58a and the concave portion 58b.

The shape of the rib 25 in a plan view is not limited. As shown in FIG. 15A, the rib 61 may be a rectangle with rounded corners in a plan view. As shown in FIG. 15B, the rib 62 may be a square with rounded corners in a plan view. As shown in FIG. 16A, the rib 63 may have an elliptical shape in a plan view. As shown in FIG. 16B, the rib 64 may be circular in plan view.

-The side surface shape of the rib 25 is not limited. The side surface shape of the rib 25 indicates a side surface shape in a side view seen from a direction along a straight line LX connecting the first end 21 and the second end 22 of the notch 20. As shown in FIG. 17A, the rib 65 may be a rectangle with rounded upper corners in a side view. As shown in FIG. 17B, the rib 66 may be a square with rounded upper corners in a side view. As shown in FIG. 18 (a), the rib 67 may be semi-elliptical in side view. As shown in FIG. 18B, the rib 68 may be semi-circular in side view.

-In the present embodiment, the rib 25 protrudes upward, but the rib 25 may protrude downward. Further, the rib 25 may have a portion protruding upward and a portion protruding downward. In this case, as in the ribs 56 and 67 shown in FIGS. 13 (a) and 13 (b), the direction of arrangement of the upwardly projecting portion and the downwardly projecting portion is the first end 21 of the notch 20. It is preferable that the direction DA is along the straight line LX connecting the second end 22 and the second end 22.

-In the present embodiment, the lid 10 is provided with one notch 20 and one rib 25, but the lid 10 may be provided with a plurality of notches 20 and a plurality of ribs 25. The plurality of notches 20 may be connected. The plurality of notches 20 may be arranged at distant places in the lid 10 without being connected. Further, the lid body 10 may be provided with a plurality of ribs 25 in one notch 20, or may be provided with a plurality of notches 20 in one rib 25.

-As shown in FIG. 19, an additional rib 70 may be provided around the notch 20 in addition to the rib 25. In FIG. 19, the two additional ribs 70, 70 are arranged so as to sandwich the notch piece 23. The additional rib 70 reinforces the peripheral portion of the notch 20 so that the peripheral portion is not deformed. As a result, the deformation of the peripheral portion of the notch 20 is suppressed, and as a result, the deformation of the notch piece 23 is further suppressed.

-As shown in FIG. 20, when the rib 72 is provided in the recess 15, the rib 72 may be connected to the side wall 17 of the recess 15. As a result, the deformation of the rib 72 is suppressed, and as a result, the deformation of the notch piece 23 is further suppressed.

DT ... Movable direction, L1 ... Cut length, L2 ... End straight line length, L3 ... Depth dimension, L4 ... Height dimension, L5 ... Length, L6 ... Width, LX ... Straight line, P ... Point, 1 ... Container , 2 ... container body, 2a ... opening, 3 ... bottom wall, 4 ... side wall, 5 ... container side fitting part, 7 ... shrink film, 10 ... lid, 11 ... top surface, 12 ... side surface, 13 ... Lid side fitting part, 15 ... recess, 16 ... bottom wall, 16a ... top surface, 17 ... side wall, 18 ... groove, 20 ... notch, 20a ... first cut surface, 20b ... second cut surface, 21 ... first end , 22 ... 2nd end, 23 ... notch piece, 24 ... notch line, 25 ... rib, 25a ... side surface, 26 ... first part, 27 ... second part, 30 ... surface part, 31 ... bent part, 41 ... notch , 41a ... corner, 42 ... notch, 42a ... corner, 43 ... notch, 44 ... notch, 45 ... notch, 45a ... first arc, 45b ... second arc, 46 ... notch, 46a ... first arc, 46b ... straight line part, 46c ... second arc, 47 ... notch, 47a ... first arc, 47b ... straight line part, 47c ... second arc, 48 ... notch, 48a ... arc, 48b ... arc, 49 ... notch, 50 ... convex Part, 51 ... Rib, 51a ... Side wall, 52 ... Rib, 53 ... Rib, 54 ... Rib, 55 ... Rib, 55a ... Convex part, 56 ... Rib, 56a ... Convex part, 56b ... Concave, 57 ... Rib, 57a ... Convex, 57b ... Concave, 58 ... Rib, 58a ... Convex, 58b ... Concave, 58c ... Face, 61 ... Rib, 62 ... Rib, 63 ... Rib, 64 ... Rib, 65 ... Rib, 66 ... Rib, 67 ... Ribs, 68 ... ribs, 70 ... additional ribs, 72 ... ribs.

Claims (6)

A lid that covers the opening of the container body
The lid has a notch, a notch having the notch as an edge, a rib for reinforcing the notch, and a surface portion provided on the notch and adjacent to the rib.
When the cut length is L1 and the length of the straight line connecting the first end and the second end of the cut is L2, the cut has a relationship of L1> L2.
The rib is provided between the first end and the second end of the notch.
The surface portion is a lid provided at least one of a portion between the first end of the notch and the rib and a portion between the second end of the notch and the rib. The lid has a recess that is recessed downward in a direction from the lid toward the container body in a fitted state in which the lid is fitted to the container body.
The bottom wall of the recess is provided with the notch, the rib and the surface portion.
The lid according to claim 1, wherein the rib projects upward in a direction opposite to the lower direction, and the height dimension of the rib is smaller than the depth dimension of the recess. One rib is provided between the first end and the second end of the notch.
The lid according to claim 1 or 2, wherein the surface portion is provided around the rib so as to follow the notch with a constant width. The lid according to any one of claims 1 to 3, wherein the notch is U-shaped. When the lid is viewed from the lid toward the container body, the ribs extend so as to intersect a straight line connecting the first end and the second end of the notch.
The rib has a first portion on the notch side of the straight line and a second portion that is a portion other than the first portion, and the length of the second portion is greater than the length of the first portion. The lid according to any one of claims 1 to 4, which is also long. A container comprising the lid according to any one of claims 1 to 5 and the container body.

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