Lid body

Abstract

To provide a lid body which is difficult to come off during storage etc. and is easy to come off during use etc.SOLUTION: A lid body according to the present invention is a circular lid body 100 having a top surface 110 and a peripheral side wall 120, and is fitted into a container body 200 by the peripheral side wall 120. The lid body has a plurality of upper recesses 170 and lower recesses 180 at opposing positions in the vertical direction, and at least two pairs of upper recesses 170 and lower recesses 180 are arranged in the circumferential direction.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a lid.

Background Art

[0002] Conventionally, packaging containers for storing foods such as kimchi have been used in supermarkets, convenience stores, and the like.

[0003] There are various types of lids for such packaging containers. The lids of the packaging containers in Patent Document 1 and Patent Document 2 are substantially square in plan view, and include a top surface and a peripheral side wall, and are fitted to the container body by the peripheral side wall. Further, if a force is applied around the corner portion of this lid having a substantially square shape in plan view to concentrate stress, it is likely to deform and can be removed relatively easily. On the other hand, a circular lid has few stress-concentrating portions and is generally highly rigid, so it is less likely to deform and is difficult to remove. In particular, when storing foods with a lot of moisture, etc., it is preferable that the lid does not accidentally come off during storage, etc., but it is preferable that the lid is easy to remove when the user eats the food, etc. Therefore, even for a circular lid, it has been desired that the lid is difficult to come off during storage, etc., and is easy to come off during use, etc.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] Therefore, in view of the above problems, the present invention provides a lid that is difficult to come off during storage, etc., and is easy to come off during use, etc.

Means for Solving the Problems

[0006] In order to solve the above problems, the lid according to claim 1 of the present invention includes a top surface and a peripheral side wall, and is a circular lid that is fitted to the container body by the peripheral side wall. A plurality of upper recesses and lower recesses are provided at positions facing each other in the vertical direction, and at least two sets of the upper recesses and the lower recesses are arranged in the circumferential direction.

[0007] According to the above characteristics, when removing the lid, starting from the sets of the upper recesses and the lower recesses at two locations on both sides, the lid can be easily lifted upward, making it easier to remove the lid.

[0008] In order to solve the above problems, the lid according to claim 2 of the present invention is characterized in that the upper recess is open in an inverted V shape so that the width becomes narrower toward the lower side, and the lower recess is open in a V shape so that the width becomes narrower toward the upper side.

[0009] According to the above characteristics, when removing the lid, on the upper side, the upper recess is deformed so as to be crushed, while on the lower side, the lower recess is deformed so as to expand. Therefore, the lid can be easily lifted upward, making it even easier to remove the lid.

[0010] In order to solve the above problems, the lid according to claim 3 of the present invention is characterized in that a convex wall portion protruding upward is provided at the edge of the top surface, a flange portion protruding laterally is provided at the lower end of the peripheral side wall, the upper recess is arranged on the convex wall portion, and the lower recess is arranged on the flange portion.

[0011] According to the above characteristics, when fitting the lid to the container body, the stress applied to the fitting portion of the peripheral side wall is less likely to be transmitted to the upper recess and the lower recess, and the upper recess and the lower recess are less likely to be deformed. As a result, the lid is less likely to be deformed when being fitted, and the lid can be firmly fitted, and at the same time, the lid is difficult to come off.

Advantages of the Invention

[0012] The lid of the present invention is difficult to come off during storage and the like, and is easy to come off during use and the like.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Explanation of Reference Numerals

[0014] 100 Lid 110 Top surface 120 Peripheral side wall 170 Upper recess 180 Lower recess 200 Container body

Embodiments for Carrying Out the Invention

[0015] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this specification, "upward" means the direction upward in the vertical direction when the lid is placed on a horizontal plane, and "downward" means the direction downward in the vertical direction.

[0016] First, FIGS. 1 and 2 show the lid 100 of the present invention. Note that FIG. 1 is an overall perspective view of the lid 100, FIG. 2(a) is a plan view of the lid 100, FIG. 2(b) is a front view of the lid 100, and FIG. 2(c) is an A - A end view.

[0017] As shown in FIGS. 1 and 2, the lid 100 is composed of a synthetic resin sheet, has a shallow dish shape with an opening downward, is substantially circular in plan view, and includes a flat top surface 110 that extends horizontally, a peripheral side wall 120 that continues downward from the top surface 110, and a flange portion 130 that protrudes laterally from the lower end portion 121 of the peripheral side wall 120. Further, a convex wall portion 150 that protrudes upward is provided at the edge portion 111 of the outer periphery of the circular top surface 110. The peripheral side wall 120, the flange portion 130, and the convex wall portion 150 are provided continuously or intermittently over the entire circumference in the circumferential direction of the lid 100. Although the lid 100 has a substantially circular shape in plan view, it is not limited thereto and can have an arbitrary shape such as a substantially elliptical shape in plan view.

[0018] Furthermore, a fitting portion 160 that protrudes inward is provided on the peripheral side wall 120. Since the peripheral side wall 120 is continuous in the circumferential direction of the lid 100, the inner surface of the peripheral side wall 120 is annular. And since the plurality of fitting portions 160 are arranged annularly along the inner surface of the peripheral side wall 120, as will be described later, the circular lid 100 is firmly tightened and attached to the container body by the fitting portions 160 arranged annularly, so that the lid 100 is difficult to come off.

[0019] In addition, a plurality of upper concave portions 170 that are recessed downward are provided on the convex wall portion 150. The upper concave portions 170 include a bottom portion 171 and side portions 172 on both sides, and the side portions 172 are inclined downward toward the bottom portion 171. Therefore, the upper concave portions 170 have a shape that opens in an inverted V shape so that the width becomes narrower toward the lower side. Although the upper concave portions 170 are configured so that the width becomes narrower toward the lower side, it is not limited thereto, and as long as it is recessed downward, it may have an arbitrary shape such as a shape that opens in a V shape so that the width becomes wider toward the lower side, or a shape that opens in a U shape so that the side portions 172 are vertical. Also, although the upper concave portions 170 are arranged on the convex wall portion 150, it is not limited thereto, and they may be arranged at any position on the peripheral side wall 120 as long as they are arranged at a position facing above the lower concave portions 180 described later.

[0020] Further, a plurality of lower concave portions 180 that are recessed upward are provided in the flange portion 130. The lower concave portion 180 includes a top portion 181 and side portions 182 on both sides, and the side portions 182 are inclined upward toward the top portion 181. Therefore, the lower concave portion 180 has a shape that opens in a V shape so that the width becomes narrower toward the upper side. Note that the lower concave portion 180 is configured to have a narrower width toward the upper side, but is not limited thereto. As long as it is recessed upward, it may have an arbitrary shape such as an inverted V shape that opens so that the width becomes wider toward the upper side, or a U shape that opens so that the side portions 182 are vertical. Further, although the lower concave portion 180 is disposed in the flange portion 130, it is not limited thereto, and may be disposed at any position on the circumferential side wall 120 as long as it is disposed at a position facing the lower side with respect to the upper concave portion 170.

[0021] Further, the upper concave portion 170 and the lower concave portion 180 are provided at positions facing each other in the vertical direction. And a set of the upper concave portion 170 and the lower concave portion 180 that face each other vertically is disposed at a total of four positions so as to be equally spaced in the circumferential direction of the lid body 100. Specifically, as shown in FIG. 2(a), each set of the upper concave portion 170 and the lower concave portion 180 is equally spaced at an interval of 90 degrees from each other in the circumferential direction of the lid body 100. Note that the set of the upper concave portion 170 and the lower concave portion 180 is disposed at a total of four positions in the circumferential direction of the lid body 100, but is not limited thereto, and may be disposed at least at two positions such as a total of two positions, a total of three positions, or a total of five or more positions. Further, as will be described later, the set of the upper concave portion 170 and the lower concave portion 180 may be disposed at three or more positions in order to be easily removed little by little while the lid body 100 maintains the fitting with the container body 200. As will be described later, if the set of the upper concave portion 170 and the lower concave portion 180 is disposed at least at two positions, the effect of making it easy to remove the lid body 100 can be obtained. Further, when the set of the upper concave portion 170 and the lower concave portion 180 is disposed at three or more positions in the circumferential direction of the lid body 100, the intervals between the sets may or may not be equally spaced.

[0022] Note that the lid 100 is formed by sheet molding (e.g., vacuum molding, pressure air molding, hot plate molding) using a synthetic resin sheet with a thickness of about 0.1 mm to 1.0 mm (millimeter). For example, as the material of the lid 100, polystyrene, polypropylene, polyethylene, A-PET, polylactic acid, or those obtained by biaxially stretching these materials can be used.

[0023] Next, FIG. 3 shows the container body 200 to which the lid 100 is to be attached. Note that FIG. 3(a) is a plan view of the container body 200, FIG. 3(b) is a front view of the container body 200, and FIG. 3(c) is a cross-sectional view taken along the line B - B.

[0024] As shown in FIG. 3, the container body 200 is composed of a synthetic resin sheet, has a deep dish shape that opens upward, is substantially circular in plan view, and includes a flat bottom surface 210 that extends horizontally, a peripheral side wall 220 that rises upward from the bottom surface 210, a flange portion 230 that protrudes laterally from the upper end of the peripheral side wall 220, and a hanging portion 240 that hangs downward from the flange portion 230. The peripheral side wall 220, the flange portion 230, and the hanging portion 240 are provided continuously or intermittently over the entire circumference in the circumferential direction of the container body 200. Although the container body 200 is substantially circular in plan view, it is not limited thereto and can have an arbitrary shape such as a substantially elliptical shape in plan view.

[0025] Note that the container body 200 is formed by sheet molding (e.g., vacuum molding, pressure air molding, hot plate molding) using a synthetic resin sheet with a thickness of about 0.1 mm to 1.0 mm (millimeter). For example, as the material of the container body 200, polystyrene, polypropylene, polyethylene, A-PET, polylactic acid, or those obtained by biaxially stretching these materials can be used.

[0026] Next, FIGS. 4 and 5 show the packaging container 300 in a state where the lid 100 of the present invention is attached to the container body 200. Note that FIG. 4 is an overall perspective view of the packaging container 300, FIG. 5(a) is a plan view of the packaging container 300, FIG. 5(b) is a front view of the packaging container 300, and FIG. 5(c) is a cross-sectional view taken along the line C - C.

[0027] As shown in FIGS. 4 and 5, the lid body 100 is attached so as to cover the container body 200 from above, and the packaging container 300 is sealed. At this time, the peripheral side wall 120 of the lid body 100 firmly clamps and covers the flange portion 230 of the container body 200 from the outside, and the fitting portion 160 of the peripheral side wall 120 is securely locked and fitted to the lower end of the hanging portion 240 of the container body 200. Therefore, the lid body 100 is difficult to come off. In particular, since the lid body 100 has a circular shape and the periphery of the circular top surface 110 is connected by a continuous peripheral side wall 120, the rigidity of the lid body 100 is high. Therefore, the lid body 100 is difficult to deform, and it is difficult for the lid body 100 to come off during storage or the like. Further, since the plurality of fitting portions 160 are annularly arranged around the hanging portion 240 of the container body 200, the lid body 100 is even more difficult to come off.

[0028] Next, FIG. 6 shows a state in which the lid body 100 is removed from the container body 200. Note that FIG. 6 is a front view of the packaging container 300.

[0029] First, as shown in FIGS. 5 and 6, when the user removes the lid body 100 from the container body 200, such as when eating the food in the container body 200, the user hooks a finger on an arbitrary position (shown as P1 in FIGS. 5 and 6) of the flange portion 130 of the lid body 100 and lifts the lid body 100 upward. Then, stress is concentrated on the upper concave portion 170 and the lower concave portion 180 (shown as P2 in FIGS. 5 and 6) located on both sides of the portion where the force is applied. Then, since each of the upper concave portion 170 and the lower concave portion 180 located on both sides of the portion where the force is applied is deformed, the lid body 100 is easily lifted upward from the deformed portion, the fitting portion 160 of the lid body 100 is disengaged from the container body 200, and the lid body 100 is easily removed. In particular, since the set of the upper concave portion 170 and the lower concave portion 180 is arranged at at least two positions in the circumferential direction, starting from the two positions on both sides thereof, the adjacent upper concave portion 170 and lower concave portion 180 are also gradually deformed upward. Therefore, the lid body 100 is easily lifted upward, and while maintaining the fitting with the container body 200, the lid body 100 is gradually easier to remove.

[0030] In addition, since the upper concave portion 170 has an inverted V-shaped opening so that its width narrows downward, as shown in FIG. 6, on the upper side, the upper concave portion 170 is deformed so as to collapse, making it easier to lift the lid body 100 upward. On the other hand, since the lower concave portion 180 has a V-shaped opening so that its width narrows upward, as shown in FIG. 6, on the lower side, the lower concave portion 180 is deformed so as to expand, making it easier to lift the lid body 100 upward. As a result, the lid body 100 can be easily lifted upward, and it becomes even easier to remove the lid body 100.

[0031] Also, since the upper concave portion 170 is provided on the convex wall portion 150 and the lower concave portion 180 is provided on the flange portion 130, when the lid body 100 is fitted to the container body 200, the stress applied to the fitting portion 160 of the peripheral side wall 120 is less likely to be transmitted to the upper concave portion 170 and the lower concave portion 180, and the upper concave portion 170 and the lower concave portion 180 are less likely to be deformed. As a result, the lid body 100 is less likely to be deformed when the lid body 100 is fitted, the lid body 100 can be firmly fitted, and the lid body 100 is less likely to come off.

[0032] Note that the lid body of the present invention is not limited to the above embodiments, and various modifications and combinations are possible within the scope described in the claims and the scope of the embodiments, and these modifications and combinations are also included in the scope of the right.

Claims

1. A circular lid having a top surface and a peripheral side wall, and being fitted to a container body by the peripheral side wall, comprising a plurality of upper recesses and lower recesses at positions facing each other in the vertical direction, wherein at least two sets of the upper recess and the lower recess are arranged in the circumferential direction. The lid is characterized by this.

2. The upper recess is open in an inverted V shape so that the width becomes narrower toward the lower side, and the lower recess is open in a V shape so that the width becomes narrower toward the upper side. The lid according to claim 1 is characterized by this.

3. A convex wall portion protruding upward is provided at the edge of the top surface, a flange portion protruding laterally is provided at the lower end of the peripheral side wall, the upper recess is arranged in the convex wall portion, and the lower recess is arranged in the flange portion. The lid according to claim 1 or 2 is characterized by this.

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