JP2012091832A - Container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container having a structure in which a polygonal lid fitted to the container having a polygonal opening can be removed easily from a container by a one-hand operation.SOLUTION: The container 1 includes a polygonal container body 10 formed of a synthetic resin sheet which has an open upper face 11 and an opening edge 12 with a flange 13 formed thereon, and a polygonal lid 20 formed of a synthetic resin sheet which can be fitted and removed to/from the container body and has a fitting portion 21 formed at an outer peripheral edge 22 which can be fitted from the outside of the flange while being fitted to the container body. On a peripheral wall 23 of the fitting portion of the lid, a single bendable bulging portion 30 is formed at a corner 24 of the peripheral wall of the fitting portion to stick and bulge outward from the fitting portion in a plan view. Between lower end both-side edges 31 and 32 of the bulging portion and peripheral wall lower end edges 33 and 34 of the fitting portion, there are formed a pair of fin portions 35 and 36 triangular-shaped in a plan view and extended to be connected to corners 25 and 26 adjacent to each other in the direction of the outer periphery of the polygonal lid.

Description

  The present invention relates to a container, and more particularly, to a container that includes a container body and a lid body having an opening formed in a polygonal shape, and the lid body can be easily removed with one hand.

  For example, various packaging containers and corresponding lid shapes have been proposed for packaging containers for storing foods such as sugar beet and other processed foods. As a general feature of the packaging container and the lid that covers the packaging container, a flange portion is formed at the opening of the packaging container body. And the protrusion which can be engaged with the flange part of a packaging container main body is provided in the cover body side. The lid is fitted to the container main body by engaging the protrusion of the lid with the flange portion of the container main body (see Patent Document 1, etc.). Usually, in the structure of the packaging container and the lid, the lid is fitted to the container body relatively firmly in consideration of handling during distribution and sales. Therefore, when removing the lid from the container body during eating, it is necessary to hold the container body with one hand while grasping the lid body with the remaining hands and peeling it off.

  However, considering accidents and illnesses, it is not rare that only one hand can be used. In addition, a decline in physical ability accompanying aging is also regarded as a problem. Furthermore, considering the care site, caregivers are not always free to use both hands. Therefore, the recent demand for barrier-free has increased the demand for a container in which the lid can be removed from the container body as easily as possible while maintaining adhesion. If possible, the lid body can be removed from the container body by one-handed operation. Under such circumstances, a container has been proposed in which the lid can be easily removed with only one hand while maintaining the adhesion.

  For example, there is a lid container in which a knob is provided on the edge of the lid and a recess is provided in the lid at a position corresponding to the knob (see Patent Document 2). Or the container made easy to operate by improving the structure of the knob (bulging part) provided in a cover body is also proposed (refer patent document 3).

  By adopting the structure of the lid represented by the cited documents 2, 3 etc., the object of removing the lid from the container body with one hand could be achieved. However, regarding the relationship between the container main body and the lid fitted to the container main body, in Cited Document 2, the shape is limited to a container in which the opening of the container main body is circular or elliptical. In Cited Document 3, although a certain effect is exhibited in a container having a circular opening, the other shapes are not always easy to open. The problem here is the shape of the container body and the lid. In order to respond to the recent various consumption trends, as many different container and lid shapes as possible are desired. This is due to the necessity of focusing on various product developments such as contents and capacity, differentiation from other products, and appeal to buyers and sellers. At present, most of the containers that can be easily opened with one hand have a circular opening, and a container having a polygonal or complicated opening has not sufficiently penetrated.

  Therefore, at the same time as the diversification of container shapes, there is an urgent need to improve the structure of a container that can be easily removed with one hand even with a complicatedly shaped lid found in a polygonal container.

JP 2001-122315 A Japanese Patent Laid-Open No. 2005-162302 JP 2005-247320 A

  The present invention has been made in view of the above points, and even in a polygonal lid fitted to a container having a polygonal opening, the lid can be easily removed from the container main body by one-handed operation. A container having a structure capable of being provided is provided.

  That is, the invention of claim 1 is a polygonal container body made of a synthetic resin sheet having an upper surface opened and a flange portion formed on an opening edge, and the container body is provided so as to be openable and closable. In a container provided with a polygonal lid made of a synthetic resin sheet having a fitting portion that can be fitted to the flange portion at the outer peripheral edge in a state, the peripheral wall of the fitting portion of the lid in plan view A single bendable bulging portion that protrudes outward from the fitting portion and bulges outward is formed at a corner of the peripheral wall of the fitting portion, and both lower edges of the bulging portion. A pair of fins having a triangular shape in plan view extending to adjacent corners in the outer peripheral direction of the polygonal lid are connected and formed between the lower end edge of the peripheral wall of the fitting portion. Related.

  The invention according to claim 2 relates to the container according to claim 1, wherein the outer surface of the bulging portion is formed with a hollow portion protruding toward the internal space.

  According to a third aspect of the present invention, the bulging portion has a top portion that is higher than the top portion of the bulging portion, and a small bulging portion that is smaller than the bulging portion is formed on the lid central portion side. The container according to claim 1 or 2.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, a notch-shaped concave portion is formed near the bulging portion and closer to the center of the lid body than the bulging portion. According to the described container.

  The invention according to claim 5 relates to the container according to any one of claims 1 to 4, wherein the fitting portion fitted on the flange portion has a plurality of protruding portions.

  The invention according to claim 6 relates to the container according to claim 5, wherein the protruding amount of the protruding portion is different depending on the fitting portion.

  The invention according to claim 7 relates to the container according to claim 5 or 6, wherein the protruding amount of the protruding portion decreases in a tapered shape toward the end of the protruding portion.

  According to the container of the first aspect of the present invention, a polygonal container main body made of a synthetic resin sheet having an upper surface opened and a flange portion formed on the opening edge, and the container main body are provided to be openable and closable. In a container provided with a polygonal lid made of a synthetic resin sheet having a fitting portion that can be fitted to the flange portion in an outer peripheral edge in a closed state with respect to the flange portion, the peripheral wall of the fitting portion of the lid is flat on the peripheral wall A single bendable bulging portion that protrudes outward from the fitting portion and bulges outward is formed at a corner of the peripheral wall of the fitting portion, and both lower ends of the bulging portion. Between the edge and the peripheral wall lower end edge of the fitting portion, a pair of fin portions having a triangular shape in plan view extending to adjacent corner portions in the outer peripheral direction of the polygonal lid are connected and formed. Polygons fitted into a container body with a complicated shape with an opening It is possible to remove the lid from the simple container body in operation by one hand even in the Jo of the lid. In addition, in response to the various consumption trends of recent years, a variety of products such as contents and capacity, differentiation from other products, and the shape of containers and lids that lead to appeal to buyers and sellers are also covered. Ease of opening the body can be realized.

  According to the container of the second aspect of the present invention, in the first aspect of the invention, the outer surface of the bulging portion is formed with a recess that protrudes toward the internal space. Is secured. In addition, the recessed portion indicates the position of the finger on both the front and back sides of the bulging portion, and serves as a knob portion when the bulging portion is picked up with a finger.

  According to the container of the invention of claim 3, in the invention of claim 1 or 2, the lid has a top portion higher than the top portion of the bulging portion on the center side of the lid, and Since a small bulge portion smaller than the bulge portion is formed, it suggests a position where a force for bending the bulge portion should be applied and also serves as a starting point during bending.

  According to the container of the invention of claim 4, in the invention of any one of claims 1 to 3, in the vicinity of the bulging part, closer to the lid center side than the bulging part, Since the notch-shaped concave portion is formed, the notch-shaped concave portion becomes a portion for concentrating the stress of the lid, and the lid can be easily bent and deformed.

  According to the container according to the invention of claim 5, in the invention according to any one of claims 1 to 3, the fitting part that is externally fitted to the flange part has a plurality of protruding parts. The lid fits tightly and inadvertent detachment is avoided.

  According to the container of the invention of claim 6, in the invention of claim 5, since the protruding amount of the protruding portion is different depending on the fitting portion, the flange of the container body is removed when removing the lid. The fitting part of the lid can be easily separated from the part.

  According to the container of the seventh aspect of the invention, in the invention of the fifth or sixth aspect, since the protruding amount of the projecting portion decreases in a tapered shape toward the end of the projecting portion, the lid is disposed in the container. When removing from the main body, the contact resistance between the protruding portion of the fitting portion and the flange portion of the container main body can be gradually reduced in consideration of the order in which the lid tries to move away from the container main body. The lid can be smoothly detached from the.

It is a perspective view of the container which concerns on the Example of this invention. It is an enlarged plan view of a bulging part. It is an expansion perspective view of a bulging part. It is sectional drawing which shows the fitting state of a container main body and a cover body. It is a cross-sectional view of a lid. It is a top view of a lid. It is sectional drawing of the XX line of FIG. It is a top view when removing a cover body. It is sectional drawing of the YY line | wire of FIG. It is a top view of the cover body of the container which concerns on another Example. It is a top view of the lid of the container concerning other examples.

  The container prescribed | regulated to invention including Claim 1 is demonstrated using the whole perspective view of FIG. The container 1 includes a polygonal container body 10 and a polygonal lid body 20 fitted to the container body 10. That is, both the container body and the lid body have a polygonal shape in plan view. The illustrated embodiment discloses a container having a quadrangular rectangular shape in plan view as a polygonal shape. The polygonal shape includes not only a form in which corner portions are joined by sides but also a form in which a joined portion between sides is chamfered in a curved shape.

  The container main body 10 opens the upper surface 11 to form an opening 17, and a flange portion 13 is formed on the opening edge 12 of the opening 17. A flange wall portion 18 surrounding the outside of the flange portion is also provided around the flange portion 13. Reference numeral 14 denotes the inside of the container body, 15 denotes a container wall, and 16 denotes a container bottom, which forms a container structure. The polygonal lid body 20 is provided so as to be openable and closable with the container main body 10, and when the lid body is in a closed state with respect to the container main body 10, the fitting portion 21 that can be externally fitted to the flange portion of the container main body 22 to have.

  The polygonal container body 10 and the polygonal lid body 20 are made by vacuum-forming a sheet of thermoplastic resin (synthetic resin sheet) of biodegradable resin such as polyethylene, polypropylene, polystyrene, polyethylene terephthalate, or polylactic acid. It can be obtained by molding into a predetermined shape. Although the thickness of the resin sheet is appropriate, it is approximately 1 mm or less. In the combination of the container main body and the lid, the raw resin of the synthetic resin sheet may be the same or different. The type of resin is appropriately selected depending on the application, contents, and packaging target.

  The peripheral wall 23 provided in the fitting part 21 of the lid 20 is provided with a bulging part 30 that protrudes from the fitting part 21 to the outside (front side of the paper) in a plan view and bulges outward from the lid. It is done. Since the lid 20 is formed from a synthetic resin sheet, the bulging portion 30 provided in the lid is also configured to be able to be bent and deformed by resin elasticity. The bulging portion 30 is formed at only one location on the corner portion 24 that is a joint location between the peripheral walls 23 and 23 of the fitting portion 21 in the lid body 20 of the present invention. The action of the bulging portion 30 is used when the lid 20 is removed from the container body 10 as will be described later. In particular, since the main point of the present invention is to make it easy to open the container with one hand, the number of the bulging portions 30 is single. Since the bulging part 30 is provided at the time of removal of a cover body, it can also be called an operation part.

  A pair of fin portions (left side) having a triangular shape in plan view are formed between both lower side edges (left side edge 31 and right side edge 32) of the bulging portion 30 and a peripheral wall lower end edge (lower end edges 33 and 34) of the fitting portion 21. A fin 35 and a right fin 36) are connected. More specifically, the left fin portion 35 is formed at the lower end edge 33 from the left edge 31 of the bulging portion 30 toward the adjacent corner 25 in the left-hand outer periphery direction as shown in the drawing. Similarly, a right fin portion 36 is formed at a lower edge 34 that extends from the right-hand extension 32 of the bulging portion 30 toward the adjacent corner portion 26 in the clockwise outer peripheral direction of the lid body 20.

  Regarding the size of the fin portions 35 and 36 formed between the corner portion 24 where the bulging portion 30 is provided in the lid body 20 and the corner portions 25 and 26 on both sides (right and left in the outer circumferential direction), It is desired to form a triangular shape in plan view while including both side edges of the lower end of 30. Therefore, the fin portions 35 and 36 on the left and right of the bulging portion can draw the corner portion 24 and the corner portions 25 and 26 on both sides thereof in accordance with the movement of the bulging portion 30. Note that if the size of the fin portion is excessive, the production amount of the lid body from the synthetic resin sheet per unit area is reduced, so that the size and shape of the lid body and the bulging portion are set in consideration.

  In the example of the illustrated lid 20, a lid surface portion 27 is formed at the center, and is raised from the fitting portion 21 by a lid step portion 28. A peripheral wall surface portion 29 is provided on the lid step portion 28 and the outer peripheral edge 22. Furthermore, between the lid step portion 28 and the peripheral wall surface portion 29, a peripheral step portion 50 for enhancing the structural strength as well as the decorative property is provided. Further, a protruding portion 60 described later is formed on the peripheral wall 23 of the fitting portion 21.

  The detail of the bulging part 30 is demonstrated using the principal part enlarged view of FIG.2 and FIG.3. The bulging part 30 of an Example is formed in the hemispherical shape which protruded in the cover surface part 27 side (lid body upper side) of the cover body 20 in side view. And as prescribed | regulated to invention of Claim 2, the hollow part 41 which protrudes toward the internal space (lid body lower side) of the said bulging part is formed in the outer surface 40 of the bulging part 30. As shown in FIG. Since the protruding direction of the bulging portion 30 and the protruding direction of the hollow portion 41 are different from each other, the structural strength of the bulging portion 30 is ensured. In addition, the recess 41 has a role of indicating a finger placement position on both the front and back sides of the bulging portion 30. At the same time, it becomes a knob part when the bulging part 30 is picked up with a finger.

  Next, as defined in the invention of claim 3, the lid surface portion 27 side that is the central portion side of the lid body 20 of the bulging portion 30 has a top portion 43 that is higher than the top portion 42 of the bulging portion 30. A small bulging portion 44 smaller than the bulging portion 30 is formed. The reason why the small bulging portion 44 is provided in the bulging portion 30 is to facilitate the operation of the bulging portion 30. When the lid 20 is to be removed from the container 1, the bulging portion 30 of the lid 20 is operated. In this case, when the bulging portion 30 has the small bulging portion 44, a person psychologically puts his finger on the small bulging portion 44 and tries to press down the small bulging portion 44 which is a protruding object. . Therefore, the small bulging portion 44 suggests a position where a force for bending the bulging portion 30 should be applied to a person who is trying to remove the lid 20, and can also be a fulcrum (starting point) at the time of bending.

  Further, as defined in the invention of claim 4, in the vicinity of the bulging portion 30, the lid surface portion 27 side, which is the central portion side of the lid body 20 from the bulging portion, is notched (V-shaped). ) Recesses 51 are formed. In this embodiment, the notch-shaped recess 51 is formed at the shortest position with the bulging portion 30 in the circumferential step portion 50 provided between the lid step portion 28 and the peripheral wall surface portion 29. When the bulging portion 30 is operated to remove the lid 20, the bulging portion 30 itself is warped upward by pushing in the small bulging portion 44 as described above. In this case, since the position of the notch-shaped concave portion 51 is formed at the site where the stress of the lid is concentrated, it is relatively easy to bend and deform the lid by bending. Reference will be made to FIG.

  The fitting of the container body 10 and the lid 20 of the container 1 will be described with reference to the enlarged sectional view of FIG. In the structure of the embodiment, the peripheral wall surface portion 29 of the lid 20 is in contact with the flange surface portion 13 s that is the upper surface of the flange portion 13 of the container body 10. Therefore, the peripheral wall 23 erected on the fitting portion 21 of the outer peripheral edge 22 of the lid 20 is fitted over the flange wall portion 18 of the flange portion 13 from the outside. Here, as specified in the invention of claim 5, the fitting portion 21 (the peripheral wall 23) that is fitted onto the flange portion 13 is provided with a plurality of protruding portions 60 (see FIG. 5 described later). As shown in the drawing, the protruding portion 69 of the protruding portion 60 reaches the lower end 18 e of the flange wall portion 18, whereby the lid body 20 is fitted to the container body 10. Thus, the fitting between the container main body and the lid becomes strong, and inadvertent detachment is avoided. Since the protrusion 60 is linearly formed along the outer peripheral direction of the lid, it can be referred to as a protrusion.

  However, simply tightening the fitting between the container body 10 and the lid 20 makes it difficult to easily remove the lid 20 from the container body 10 when necessary, particularly by one-handed operation. Therefore, in order to meet the object of the invention, as disclosed in the cross-sectional view of the lid body 20 in FIG. 5, a plurality of projecting portions 60 (projection portions) are provided on the peripheral wall corresponding to the shape of the lid body 20. ing.

  In the example of FIG. 5, the plurality of protruding portions 60 are provided at the corners of the lid in consideration of the shape of the quadrangular lid 20. Of course, depending on the polygonal shape of the lid, it may be the center of the peripheral wall. In addition to the same amount of protrusion (height of the protrusion 69) of the plurality of protrusions 60 formed on the peripheral wall 23 of the fitting part 21, the protrusion is defined as defined in the invention of claim 6. The amount of protrusion varies depending on the position of the peripheral wall 23 of the fitting portion 21 where the shape portion 60 is provided. And the protrusion amount Dp1 of the 1st protrusion part 61 provided in the corner | angular part 24 in which the bulging part 30 was formed, and the 3rd protrusion shape provided in the corner | angular part 24i on the diagonal direction side with the same corner | angular part. The protrusion amount Dp3 of the portion 63 is larger than the protrusion amount Dp2 of the second protrusion 62 provided on the corner portions 25 and 26 on both sides (right and left sides in the outer circumferential direction) of the corner portion 24 (Dp1> Dp2, Dp3> Dp2). In this example, the protrusion Dp1 of the first protrusion 61 and the protrusion Dp3 of the third protrusion 63 are the same.

  In the case of the quadrangular lid 20 according to the embodiment, the lid is lifted from the bulging portion 30 and removed from the container body 10. As will be described later, the first projecting portion 61 formed in the corner portion 24 near the bulging portion 30 is first separated from the flange portion 13. Next, the left and right second projecting portions 62 of the corner portion 24 are separated from the flange portion 13. Finally, the first projecting portion 61 formed on the peripheral wall 23 near the corner portion 24 i is separated from the flange portion 13.

  Considering the order in which the projecting portions 60 in the quadrangular lid 20 are separated from the flange portion 13, the third projecting portion 63 serves as a fulcrum for the rotation of the lid 20 itself. It is necessary to maintain the engagement state with the flange portion 13 for a long time. On the other hand, since each 2nd protrusion part 62 and 62 needs to leave | separate from the flange part 13 quickly, it suppresses the protrusion amount of a protrusion part rather than the 1st protrusion part 61 and the 3rd protrusion part 63, and forms it shallowly. is doing. As described above, the protruding amount of each protruding portion is specifically defined in consideration of the ease of removing the lid, the size of the container, and the like according to the shape of the polygonal lid.

  Furthermore, as defined in the invention of claim 7, the protruding amount of the protruding portion is tapered toward the end of the protruding portion. In the illustrated embodiment, the angle T1 is formed at each of the protrusions 62e, 62e of the protrusions facing the bulging part 30 with respect to the second protrusions 62, 62 in accordance with the amount of protrusion of the protrusions described above. Inclined portions 65, 65 are formed which are inclined at. When the lid 20 is removed from the container body 10 by forming the tapered inclined portions 65 and 65 in the projecting portion, the order of the lid 20 to be separated from the container body 10 is taken into consideration. The contact resistance between the projecting portion 60 provided on the fitting portion 21 and the flange portion 13 of the container body can be gradually reduced, and the lid 20 can be smoothly detached from the container body 10.

  The operation of the bulging part and the movement of the fin part interlocking with this will be described with reference to FIGS. The plan view of FIG. 6 shows the lid body 20 in a state where the lid body 20 is externally fitted to the container body 10 and the bulging portion 30 has not been operated yet. 7 is a longitudinal sectional view at a position (X-X line) where the concave portion 51, the small bulging portion 44, and the bulging portion 30 of FIG. The longitudinal sectional view along the YY line in FIG. 9 is the same as the division along the XX line. Similar to the disclosure of FIG. 4, in FIG. 7, the peripheral wall surface portion 29 of the fitting portion 21 of the lid 20 is in contact with the flange surface portion 13 s serving as the upper surface of the flange portion 13 of the container body 10. (Opening 17) is sealed. As shown in the direction of the longitudinal sectional view of the figure, the protrusion 69 of the first protrusion 61 of the protrusion 60 is engaged with the lower end 18 e of the flange wall 18 provided around the flange 13. .

  In the plan view of FIG. 8, when the lid 20 is to be removed from the container body 10, the bulging portion is sandwiched by fingers from above and below using the dent 41 of the bulging portion 30 as a guide, and bulges in the direction of the arrow F 1. The end portion 39 of the protruding portion 30 is pulled up. Further, by pushing the small bulging portion 44 together with the movement of the bulging portion 30 indicated by the arrow F1, the stress concentrates on the bent portion 29o connecting the concave portion 51 of the peripheral wall surface portion 29 and the small bulging portion 44 according to the arrow F2. Will be broken. Therefore, as can be seen from the cross-sectional view of FIG. 9, the bulging portion 30 is picked up with the bent portion 29o as a fulcrum of rotation, and the protruding portion 69 of the first protruding portion 61 is separated from the flange wall portion 18 (arrows). F1, F2).

  The lid body 20 of the illustrated embodiment includes a circumferential step 50 to cope with the bending deformation. For this reason, it is a multistage structure from the cover surface part 27 of the cover upper part to the lower surrounding wall 23 (refer FIG. 4). Even if the resin elasticity of the lid itself is taken into account, the multi-stage portion of the lid is difficult to bend in conjunction with the operation of the bulging portion 30. Therefore, stress concentrates on the circumferential stepped portion 50 which is in the vicinity of the bulging portion 30 and the bent portion 29o and has a stepped shape. By providing the notch-shaped recess 51 in the circumferential step 50, the circumferential step 50 can easily be bent according to the bending of the bulging portion 30. That is, the concave portion 51 is a part where stress is intentionally concentrated.

  The outer peripheral edge 22 of the lid 20 is bent at the bent portion 29o by the movements of the arrows F1 and F2, and the peripheral walls 23 and 23 and the peripheral wall surface portion of the fitting portion 21 provided on the outer peripheral edge 22 29 is also deformed. Here, as described above, the triangle in plan view formed by connecting between the lower side edges (the left side edge 31 and the right side edge 32) of the bulging part 30 and the peripheral wall lower side edge (lower edge 33, 34) of the fitting part 21. The bending deformation of the bulging portion 30 is transmitted to the pair of fin portions (the left fin portion 35 and the right fin portion 36), and the pair of fin portions 35 and 36 are swollen as indicated by the arrow F3 in FIGS. Pulled to the exit 30 side. Both the left corner 25 of the corner 24 through the lower edge 33 connected to the left fin 35 and the right corner 26 of the corner 24 through the lower edge 34 connected to the right fin 36. Are also pulled toward the bulging portion 30 side in synchronization (see arrow F4).

  When the single bulged portion 30 as the bent portion is lifted with a finger to remove the lid 20 from the container body 10, the bulged portion 30 is bent to generate an upward force. The fitting between the lid 20 and the container body 10 is released. The upward force is transmitted all at once in the outer peripheral direction of the lid through a pair of fin portions 35 and 36 having a triangular shape in plan view formed on the peripheral walls 23 and 23 of the polygonal lid 20 (square in the embodiment). The Therefore, the outer peripheral edge 22 and the peripheral wall surface portion 29 of the lid body 20 are deformed, and the engagement between the flange portion 13 of the container body 10 and the fitting portion 21 of the lid body 20 is performed on the peripheral wall 23 where the fitting portion 21 is located. The corner portion 24 is released continuously while being transmitted through the flange portion 13 in the circumferential direction of the container body. Thus, the container 1 can be easily opened and the lid 20 can be easily removed with one touch by one operation of one hand.

  FIG. 10 is a plan view of a lid 20A according to the second embodiment. This embodiment discloses a pentagon as a polygonal shape. A container main body (not shown) to which the lid 20A is fitted has a container shape having a pentagonal opening on the upper surface in accordance with the shape of the lid, and is a bowl shape, a bowl shape, or a cylindrical shape. The single bendable bulging portion 30 of the lid 20A is provided at the corner portion 24a. The corners 25a and 26a adjacent to each other in the outer peripheral direction of the lid body 20A are also provided between the lower end side edges 31 and 32 of the bulging part 30 and the peripheral wall lower edge 33 and 34 of the fitting part 21 from the corner part 24a. A pair of fin portions 35a and 36a having a triangular shape in plan view extending in a line are connected and formed.

  Further, in the peripheral wall 23a of the fitting portion 21a of the lid 20A, a first projecting portion 61a, a second projecting portion 62a, and a third projecting portion as projecting portions 60 that are externally fitted to a flange portion of a container body (not shown). 63a is formed. In the lid 20A of the second embodiment, the protruding amount of the second protruding portion 62a is formed to be tapered toward the end thereof. Moreover, in the same Example, the surrounding step part 50a is provided between the cover surface part 27 and the surrounding wall surface part 29, Among them, it adjoins the bulging part 30 and is notch-shaped in the lid body center side rather than the bulging part. The recess 51a is formed. The structures of the bulging portion 30 and the small bulging portion 44 are the same as those of the lid 20 of the first embodiment described above. The operation modes of the bulging portion 30 and the surrounding fin portion, peripheral wall and the like when removing the lid 20A from the container body are the same as those in the first embodiment described above.

  FIG. 11 is a plan view of a lid 20B according to the third embodiment. This embodiment discloses a triangle as a polygonal shape. Above all, it is disclosure of triangles that are Lulu polygons. The container main body (not shown) to which the lid 20B is fitted has a container shape having a triangular opening on the upper surface in accordance with the shape of the lid, and is a bowl shape, a bowl shape, or a size cylinder shape. A single bendable bulging portion 30 of the lid 20B is provided at the corner 24b. The corners 25b and 26b adjacent to each other in the outer peripheral direction of the lid body 20B are also connected between the lower end side edges 31 and 32 of the bulging part 30 and the peripheral wall lower edge 33 and 34 of the fitting part 21b. A pair of fin portions 35b and 36b having a curved triangular shape in plan view extending in a straight line are connected to each other.

  Moreover, the 1st protrusion part 61b and the 2nd protrusion part 62b are formed in the surrounding wall 23b of the fitting part 21b of the cover body 20B as the protrusion part 60 which fits the flange part of the container main body which is not shown in figure. The peripheral stepped portion 50b in this example is not provided between the lid surface portion 27 and the peripheral wall surface portion 29, but is formed on the peripheral wall surface portion 29 along the outer peripheral edge 22b. The notch-shaped recess 51b is formed closer to the bulging portion 30 and closer to the center of the lid than the bulging portion. The structures of the bulging portion 30 and the small bulging portion 44 are the same as those of the lid 20 of the first embodiment described above. The operation modes of the bulging portion 30 when removing the lid 20B from the container main body, the peripheral fin portion, the peripheral wall, and the like are the same as in the first embodiment described above.

  When the structure of the lids 20, 20A, 20B in the containers of the first to third embodiments shown and described in detail so far is applied, the container body is fitted into a complex-shaped container body having a polygonal opening. Even in a polygonal lid, the lid can be easily removed from the container body by one-handed operation. Therefore, the packaging container is made barrier-free. In addition, it is easy to open the lid and responds to various consumer trends in recent years. Various product development such as contents and capacity, differentiation from other products, appeal to buyers and sellers. It is possible to propose containers and lids that lead to Note that the position of the notch-shaped recesses, the position and number of the protruding parts, the protruding amount of the protruding parts, the formation of the taper-shaped reduced portion of the protruding parts, etc., take into account the shape, size, application, etc. of the container. Optimally selected and applied. For this reason, it is not limited only to the structure of the Example shown and explained in full detail.

DESCRIPTION OF SYMBOLS 1 Container 10 Container main body 11 Upper surface 12 Opening edge 13 Flange part 18 Flange wall part 20 Lid body 21 Fitting part 22 Outer peripheral edge 23 Peripheral wall 24,25,26 Corner | angular part 30 Swelling part 31 Left side edge (lower end both sides edge)
32 Right side edge
33, 34 Perimeter wall lower edge (lower edge)
35 Left fin part (fin part)
36 Right fin part (fin part)
40 External surface of bulging portion 41 Depressed portion 44 Small bulging portion 50 Circumferential stepped portion 51 Recessed portion 60 Protruding portion (ridge portion)
61 1st projecting portion 62 2nd projecting portion 63 3rd projecting portion 65 inclined portion 69 projecting portion

Claims (7)

Polygonal container body made of a synthetic resin sheet with an opening on the top and a flange on the opening edge, and can be opened and closed on the container body, and can be externally fitted to the flange when closed to the container body In a container provided with a polygonal lid made of a synthetic resin sheet having a fitting portion on the outer periphery,
On the peripheral wall of the fitting portion of the lid, a single bendable bulging portion that protrudes outward from the fitting portion and bulges outward in a plan view is formed at the corner of the peripheral wall of the fitting portion. A pair of triangular shapes in plan view extending between adjacent lower edges of the outer periphery of the polygonal lid between the lower end both side edges of the bulging part and the peripheral wall lower end edge of the fitting part. A container in which fins are connected and formed.   2. The container according to claim 1, wherein a hollow portion is formed on an outer surface of the bulging portion so as to protrude toward the internal space.   3. The bulge portion has a top portion that is higher than the top portion of the bulge portion, and a small bulge portion that is smaller than the bulge portion is formed on the center side of the lid body. Container.   The container according to any one of claims 1 to 3, wherein a notch-shaped recess is formed closer to the bulging portion and closer to the center of the lid body than the bulging portion.   The container according to any one of claims 1 to 4, wherein the fitting portion that is externally fitted to the flange portion has a plurality of protruding portions.   The container according to claim 5, wherein the protruding amount of the protruding portion is different depending on the fitting portion.   The container according to claim 5 or 6, wherein a protruding amount of the protruding portion decreases in a tapered shape toward an end of the protruding portion.

Images