JP2012081970A - Packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate attachment and detachment of a lid body to and from a container body, and to stably hold the lid body in the opened state.SOLUTION: A plate portion 22 of the lid body 2 is fitted to a narrow portion 12 between protrusions 11 of the container body 1, and attachment/detachment to/from the container body 1 can be facilitated. A hinge part 21 is provided on the lid body 2, and thereby, the lid body can be freely opened and closed. When the lid body 2 is turned, the lid body abuts on the protrusion 11 of the container body 1, and when the lid body starts to fall backward, the plate portion 22 is pulled up by the lid body, and abuts on a narrow width part of the narrow portion 12, and is bent upward while having the contact point therebetween. By the elastic force of the plate portion 22 bending, the impact force caused by abutting of the plate portion to the narrow portion 12 is eased, and coming off from the narrow portion 12 or excess falling backward of the plate portion can be prevented. A plurality of protrusions 11 are provided on a surface of the plate portion 22, and rigidity of the plate portion can be adjusted in a well-balanced state.

Description

  For example, the present invention relates to a packaging container in which a shopper opens and closes a lid when purchasing a side dish stored in a container at a supermarket.

  Grocery departments such as supermarkets and department stores have corners that sell side dishes such as yakitori and tempura in packaging containers so that shoppers can easily pick up and purchase them. Unlike the display shelves of packed goods, these sales corners are provided at a low position so that even a short shopper such as a woman or an elderly person can take out the prepared food without difficulty. Therefore, around the sales corner, not only is it easy for dust to fly due to people coming and going, but also saliva, gonorrhea, etc. scattered from the shopper may be mixed into the food.

  For this reason, these packaging containers are provided with transparent lids that allow the contents to be seen to protect the prepared food from dust and the like. However, in this case, for example, the shopper must remove the lid with one hand while holding the bag, take out the prepared food with chopsticks and tongs, close the lid again, and put it in another bag or container. However, the operation of closing the lid again is very troublesome for the shopper, and many people leave with the lid removed. Even if the lid is a packaging container with a lid that can be opened and closed without removing the lid, the lid may come off from the container body with an open momentum, and the shopper has to be careful when opening and closing the lid.

  In order for such a shopper to open and close the lid and make it easy to take food such as side dishes, the recesses and projections provided at the ends of the container body and the lid are fitted, and this end is pivoted. A packaging container (see Patent Document 1) that opens and closes a lid has been proposed.

Utility model registration No. 3093200

  However, the above-described conventional packaging container with a lid has the following problems to be improved. That is, in the container described in Patent Document 1, if the insertion of the convex portion is weak, the convex portion will come out of the concave portion and be removed from the container body while the lid is repeatedly opened and closed. On the other hand, if the insertion of the convex portion is too strong, for example, when removing the lid, the end of the container body is pressed to pull out the convex portion and the flange of the lid is pulled.

  Moreover, if the convex part provided in the cover body side is inserted in the recessed part provided in the container main body side, it will be in the state which the edge part of the cover body and the edge part of the container main body contact | adhered. When the lid is opened in this state, the side wall of the lid collides with the base projecting from the end of the container body and bounces back, and the lid returns and closes due to the reaction.

  SUMMARY OF THE INVENTION Accordingly, a first object of the present invention is to provide a packaging container that can be easily attached to or removed from the container body, and that is difficult to remove from the container body even when the lid is repeatedly opened and closed. There is. A second object of the present invention is to provide a packaging container that can easily open and close the lid and can maintain the open state.

  In order to solve the above problems, the packaging container according to the present invention is characterized in that the lid body can be easily attached to or removed from the container body by fitting the plate portion on the lid body side to the narrowed portion on the container body side. In addition, the lid body can be prevented from coming off from the container body, and the lid can be kept open by utilizing the elasticity and rigidity of the plate portion.

  That is, the packaging container by this invention is equipped with the container main body and cover body made from a thermoplastic resin. A container flange is provided on the peripheral edge of the container body, and a plurality of projecting portions projecting upward are provided on one side of the container flange with a predetermined interval along the longitudinal direction of the one side. In addition, a narrowed portion is formed between the protruding portions adjacent to each other. The narrow portion is formed with a narrow width portion at a position above the bottom surface. A lid flange portion that overlaps the container flange portion is provided at the peripheral portion of the lid body, and a hinge portion provided along the longitudinal direction is provided on one side of the lid flange portion, and outward from the one side. And a plurality of plate portions projecting from each other. The plate portion is formed with a fitting portion located at the root portion and a wide projecting portion located at the tip portion. The fitting portion of the plate portion is fitted to the narrow portion between the bottom surface of the narrow portion and the narrow portion. The lid body rotates about the hinge portion as a central axis, and the side wall of the lid body abuts on the protruding portion.

  Here, the operation of the lid and the function of the plate part will be described. That is, when the lid is opened, the lid rotates with the hinge portion as a fulcrum, and the side wall of the lid contacts the projecting portion. After the side wall of the lid body comes into contact with the projecting portion, the lid body is rotated so as to fall further backward due to its own weight with the contacted position as a fulcrum, and a plurality of the plate portions are rooted. Pull upward from the part. When the root portions of the plurality of plate portions are pulled upward, the fitting portion of the plate portion is restrained at a position where the fitting portion is fitted between the bottom surface of the narrowed portion and the narrow width portion. After the fitting portion of the plate portion is constrained between the bottom surface of the narrowed portion and the narrow portion, the plate body is bent upward with a position where the plate portion comes into contact with the narrow portion as a fulcrum. The rotation of the lid is stopped at a point where the force of rotating to fall backward due to its own weight balances the reaction force of bending of the plate portion.

  When the lid is rotated, as described above, the base portion of the plate portion is pulled up by the lid, and the fitting portion of the plate portion is located between the bottom surface of the narrowed portion and the narrow portion. It is restrained in the position fitted in. Therefore, if the rigidity of the plate portion in the width direction is low, when the fitting portion of the plate portion is restrained between the bottom surface of the narrowed portion and the narrow width portion, the fitting portion warps in the width direction. In other words, the width of the fitting portion may be narrowed and come off from the narrowed portion. Also, if the rigidity of the plate portion in the longitudinal direction is low, even after the side wall of the lid body comes into contact with the protruding portion, the plate portion will be bent too much in the longitudinal direction and the lid body will fall backward. There may be cases. Therefore, it is desirable to provide a convex portion for enhancing rigidity on the front surface or the back surface of the plate portion. As a result, it is possible to make it difficult for the plate portion to warp in the width direction and to bend in the longitudinal direction.

  Also, if the rigidity of the plate part is increased too much, the fitting part of this plate part does not warp in the width direction, so it is difficult to attach to or remove from the narrowed part, and the plate part is difficult to bend in the longitudinal direction. When the base part of the plate part is pulled up by the lid, the impact force when coming into contact with the narrow part is not absorbed, so that the plate part may come off from the narrow part or the plate part The lid may be closed by a restoring force that causes the portion to return to the original flat shape. Therefore, it is desirable that a plurality of divided projections be provided on the front surface or the back surface of the plate portion. Thereby, the part which has a convex part in the surface or back surface of a plate part, and the part which does not have are provided, and the rigidity of this plate part can be adjusted.

  By the way, when the lid is rotated to fall further backward due to its own weight, as described above, the base portion of the plate portion is pulled upward, so that the plate portion is inclined obliquely, and the tip portion is Contact one side of the container flange. Accordingly, the base portion bends upward with the position in contact with the narrow width portion as a fulcrum, and the tip portion also bends upward due to a reaction force from one side of the container flange portion. Therefore, it is desirable that the convex portion is provided from the root portion to the tip portion. Thereby, the rigidity of both the base portion side and the tip portion side of the plate portion can be increased, and the plate portion can be prevented from being excessively bent.

  On the other hand, if the rigidity of the plate portion in the longitudinal direction is too high, it is difficult to bend upward. For this reason, if the force to open the lid is too strong, the impact force when the plate portion comes into contact with the narrow portion cannot be absorbed, and the plate portion may come off the narrow portion. Even if the plate portion is bent, the restoring force of the plate portion is strong, and the lid body may be closed. Therefore, it is desirable that the plurality of convex portions are separately provided on both the base portion side and the tip portion side with respect to the position where the plate portion contacts the narrow portion. As a result, the plate portion is easily bent between the convex portions provided separately, so that the plate portion absorbs an impact force when the plate portion comes into contact with the narrow width portion, and the plate portion becomes the narrow portion. Can be prevented, and the restoring force of the plate portion can be weakened to prevent the lid from closing.

  The plurality of convex portions provided on the plate portion may be irregular in shape and size, or the intervals between the convex portions may be different from each other. However, in such a case, the rigidity of the plate portion becomes non-uniform depending on the location, causing unnecessary twisting and bending, and the plate portion is easily detached from the narrowed portion. Therefore, it is desirable that the plurality of convex portions have substantially the same shape and the same size. Further, it is more desirable that the plurality of convex portions are arranged at equal intervals. Thereby, the said plate part can raise uniformly the rigidity of the width direction and longitudinal direction of this plate part.

  By the way, when the lid is rotated and opened, the side wall of the lid comes into contact with the protruding portion. In such a case, if the rigidity of the container flange portion provided with the protruding portion in the rotating direction is low, the container flange portion also bends downward. That is, as described above, the lid body has a pivotal force at which the side wall of the lid body comes into contact with the projecting portion as a fulcrum, and the lid body turns to fall backward by its own weight, At the point where the bending reaction force is balanced, the rotation of the lid is stopped. Therefore, if the rigidity of the container flange portion provided with the projecting portion is low in the rotational direction, the container flange portion is easily bent downward, and the lid body falls down rearward so that the lid body is difficult to close. Become. Therefore, it is desirable that an uneven portion is provided on the bottom surface of the narrowed portion in a direction perpendicular to the longitudinal direction of one side of the container flange portion. As a result, it is possible to prevent the lid body from falling excessively backward and becoming difficult to close.

  Here, the “thermoplastic resin” corresponds to a biodegradable resin such as polystyrene, polypropylene, polyethylene terephthalate, or polylactic acid resin.

  The “plurality of protrusions” may be three or more, preferably 4-6. “Provided at a predetermined interval” includes not only the case where the plurality of protrusions are provided at the same interval, but also the case where they are provided at different intervals. The “stenosis part” means that one side of the container flange part is a bottom surface of the constriction part, the bottom surface, the opposing surfaces and surfaces of the protrusions adjacent to each other, and a part of these surfaces, It means what was formed with the part where the width is narrow. The “narrow width portion” of the narrowed portion is not limited to a portion formed by protrusions protruding in parallel from a part of the opposing surface at a position above the bottom surface of the narrowed portion. The thing which inclines inside from the bottom face to the upper position of this bottom face also corresponds.

  The term “hinge part” means a slit that has a slit along one side of the lid flange part or a perforation that is freely bent. The “plate part” is not limited to a fitting part located at the base part and a wide projecting part located at the tip part, but a narrow constriction part is formed in the middle part. The thing which is done is also included. In this case, the constricted portion of the plate portion is fitted and restrained to the narrow portion between the bottom surface of the narrow portion and the narrow portion.

  One or more “convex portions” may be used. In the case of a plurality, the case where a plurality are arranged in the width direction of the plate portion, the case where a plurality are arranged in the longitudinal direction of the plate portion, or the case where a plurality are arranged in both the width direction and the longitudinal direction of the plate portion are included. . The top surface shape of the “convex portion” is not limited to a rectangle such as a square, but also includes a polygon such as a rhombus, a circle or an ellipse, or a shape such as a cross or a star. The cross-sectional shape of the “convex portion” is not limited to a trapezoidal shape or a rectangular shape whose upper surface is narrower than the bottom surface, but also includes a triangular shape, a semicircular shape, a semielliptical shape, or a dome shape. When the cross-sectional shape of the “convex portion” is a trapezoid whose upper surface is narrower than the bottom surface, the inner angle of the side surface is preferably 10 ° to 45 °, and the side length ratio of the upper surface to the bottom surface is 1: 2 (the inner angle of the side surface is 45). °) is more desirable.

  “Substantially the same shape and the same dimension” means that the upper surface shape and the cross-sectional shape of the convex portion are the same, and the convex portion having an error in molding by an injection method, a vacuum method, or the like also corresponds. .

  In the packaging container according to the present invention, a plurality of plate portions projecting outward from one side of the lid flange portion are formed on the narrowed portion between adjacent projecting portions provided on one side of the container flange portion from above. It can be easily fitted by simply pushing with a finger, and if the plate is twisted, it can be removed from the constriction with one hand, so the burden on the worker who puts the lid on and off and puts food into the container body can be reduced. Even if the lid rotates and the plate portion is pulled up, the narrow portion of the narrowed portion and the overhanging portion of the plate portion serve as locking means, so that the plate portion comes out of the narrowed portion. This prevents the shopper from opening and closing the lid easily and repeatedly with the hinge portion of the lid as the central axis. Therefore, the shopper can take out the food from the container body without worrying about the lid.

  Further, by providing a convex portion on the front surface or the back surface of the plate portion, the rigidity of the plate portion is increased, so that even if the plate portion is twisted, it is difficult to come off from the narrowed portion, and the lid body is rotated. Even if it moves and tilts backward, it is difficult to bend, and the state where the lid is opened can be stably held. Therefore, even if the lid is formed thin and the plate portion becomes thin, the plate portion can absorb this load without receiving excessive load due to the load of the lid.

  Further, by providing a plurality of convex portions on the front surface or the back surface of the plate portion, the rigidity of the plate portion is adjusted so that the plate portion can be easily fitted to the narrow portion and the lid body can be rotated. Accordingly, the plate portion can be easily bent in the longitudinal direction. Therefore, even a small packaging container can be attached to and detached from the container body without damaging the base part of the plate part, and the lightweight lid of the packaging container can restore the plate part. Can be prevented from closing.

  Since the convex portion is provided from the root portion to the tip portion, rigidity can be increased on both the root portion side and the tip portion side of the plate portion, and the plate portion is excessively bent. Can be prevented. Therefore, even if the shopper opens the lid body vigorously, the plate portion can be prevented from coming off from the narrowed portion, and further, the lid body can be prevented from falling excessively backward.

  Further, by providing the plurality of convex portions separately on both the root portion side and the tip portion side with the position where the plate portion is fitted to the constriction portion, the space between the convex portions is provided. Since it becomes easy to bend, it can avoid that the rigidity of the longitudinal direction of this plate part becomes high too much. Therefore, it is possible to easily absorb the impact force when contacting the narrow portion of the narrowed portion, and to prevent the plate portion from coming off from the narrowed portion, and to weaken the restoring force of the plate portion. Thus, the lid can be prevented from closing. Therefore, even if the shopper opens the lid body vigorously, the plate portion does not come off from the narrowed portion, and the lid body can be held open.

  The plurality of convex portions have substantially the same shape and the same dimensions, and are arranged at equal intervals, whereby the rigidity in the width direction and the longitudinal direction of the plate portion can be improved in a balanced manner. Therefore, not only does the plate part not easily come off from the narrowed part, but the lid part does not fall down too much, and even if the lid is opened with force, the plate part may come off the narrowed part. The side wall portion of the lid collides with the projecting portion and bounces back to close the lid body, and the lid body can be held in a more stable state.

  The bottom surface of the narrowed portion is provided with an uneven portion in a direction orthogonal to the longitudinal direction of one side of the container flange portion, thereby increasing the rigidity of the container flange portion in the rotational direction and excessively covering the lid. It is possible to prevent the lid from becoming difficult to close without falling backward. Therefore, even if the container main body is formed thin and the container flange portion becomes thin, the container flange portion is not only excessively bent downward due to the load of the lid body, but also the attachment / detachment of the lid body. Therefore, deformation and breakage of the container flange portion can be prevented.

It is a top view of a container main body. It is a top view of a lid. It is the upper side figure and side view of a packaging container. It is a partially expanded top view of a packaging container. It is a partially expanded sectional view of a packaging container. It is a partially expanded sectional view of the side surface of a packaging container. It is explanatory drawing which shows the force added to a plate part.

  The structure of the packaging container according to the present invention and the structure of each part of the packaging container will be described below with reference to FIGS.

  As shown in FIGS. 1 to 3, this packaging container is made of a polystyrene resin sheet, and has a container body 1 with a deep rectangular bottom and a transparent opening from the gripping part with one side of the peripheral edge of the container body as an axis. The lid 2 is provided. In this packaging container, roundness of about R5 to R10 is provided at each corner. Cut prevention means is provided at the periphery of the lid flange portion of the lid 2 so as not to cut the finger.

  A horizontal container flange portion connected to the peripheral edge portion is provided at the peripheral edge portion of the container main body 1. On the flat rear container flange part F1 having a depth on one side of the container flange part, four projecting parts 11 projecting upward are fitted to the plate part 22 along the longitudinal direction of the rear container flange part. It is provided with an interval equivalent to the width of the portion 22a. Further, a narrowed portion 12 is formed between the protruding portions 11 and 11 adjacent to each other. Further, an uneven portion 13 is provided on the bottom surface of the narrowed portion 12 from the outer end portion of the rear container flange portion to the inner end portion in a direction orthogonal to the longitudinal direction of the rear container flange portion F1. Note that the protrusion 11 has a step in the cross-sectional shape of the side surface, thereby increasing the strength of the protrusion.

  On the peripheral edge of the lid body 2, a horizontal lid flange portion is provided which is continuous with the peripheral edge portion and overlaps the container flange portion. In the above-mentioned lid flange portion, the rear lid flange portion F2 on the same side as the rear container flange portion F1 includes a hinge portion 21 that is slit along the longitudinal direction, and further outward from the rear lid flange portion. And three plate portions 22 projecting from each other. The rear lid side wall 23 that is connected to the rear lid flange portion F2 on the side wall of the lid 2 that is inclined slightly inward from the peripheral edge of the lid 2 is provided with a rear lid side wall projection 23a that projects from the surface. Thereby, the strength of the side wall is increased.

  Therefore, when the container body 1 is closed with the lid 2, the container flange portion and the lid flange portion are overlapped, and the fitting portion 22 a of the plate portion 22 of the lid body is fitted to the narrowed portion 12. . When the lid body 2 is opened in order to take out food from the accommodating portion of the container body 1, when the grip portion of the lid body is lifted, the lid body rotates about the hinge portion 21 as a central axis. Then, the lid body 2 rotates and tilts backward, and the rear lid side wall protruding portion 23a is kept in contact with the projecting portion 11 and opened. That is, the force that rotates the lid 2 to fall backward by its own weight and the bending reaction force of the plate portion 22 are balanced. The unevenness portion 13 provided on the bottom surface of the narrowed portion 12 enhances the rigidity in the rotational direction of the rear container flange portion F1, so that the lid body 2 can be easily moved without excessively falling down. Can be closed. Even if the plate portion 22 is attached to or detached from the narrowed portion 12, the rear container flange portion F1 is not deformed or damaged.

  The container flange portion other than the rear container flange portion F1 and the lid flange portion other than the rear lid flange portion F2 are each provided with either a convex portion or a concave portion, and the convex portion and the concave portion are fitted to each other. Thus, the container body 1 is closed by the lid 2 so as to be overlapped. The side wall of the container body inclined slightly inward from the peripheral edge of the container body 1, and the rear container body side wall connected to the rear container flange portion F1 is gently inclined from the inside to the outside than the inclination of the rear container body side wall. A protruding bulge is provided, which increases the strength of the side wall. A plurality of convex structures are provided on the bottom surface of the housing portion of the container body 1, thereby not only preventing the food from slipping and rolling, but also removing oil and juice from the food from the grooves of the convex structure. The quality of this food can be maintained by accumulating in portions.

  FIG. 4 shows an enlarged view of the dotted line portion X in FIG. FIG. 5 shows a cross section AA of the enlarged view shown in FIG. The narrow portion 12b is formed with a narrow width portion 12b narrower than the fitting portion 22a of the plate portion 22 at a position above the bottom surface 12a. The plate portion 22 is formed with a fitting portion 22a located at the base portion 22c of the plate portion and a curved and wide projecting portion 22b located at the tip portion 22d.

  Therefore, when fitting the plate portion 22 to the narrowed portion 12, the fitting portion 22a of the plate portion 22 is pressed against the narrow width portion 12b of the narrowed portion 12 with a finger from above. Then, the elasticity of the plate portion 22 warps upward in the width direction of the plate portion, and the width of the fitting portion 22a is narrowed, so that the fitting portion is fitted to the narrowed portion 12. Thus, even if the lid body 2 rotates and the plate portion 22 is pulled up, the narrow width portion 12b and the overhang portion 22b serve as locking means to prevent the plate portion from coming out of the narrowed portion 12. Can do. That is, the fitting portion 22a is restrained at a position where the fitting portion 22a is fitted between the bottom surface of the narrowed portion 12 and the narrow width portion 12b. Further, when removing the plate portion 22 from the constricted portion 12, if the width of the fitting portion is narrowed by twisting the fitting portion 22a of the plate portion or picking the overhanging portion 22b, the plate portion 22 can be easily removed with one hand. be able to.

  On the surface of the plate portion 22, from the root portion 22 c to the tip end portion 22 d of the plate portion 22, the top surface shape is square, and the cross-sectional shape has a side length ratio of the top surface to the bottom surface of 1: 2 (the inner angle of the side surface is 45 °). The plurality of convex portions 24 each having a trapezoidal shape are arranged at equal intervals in three vertical and horizontal directions. Further, the plurality of convex portions 24 sandwich the contact portions T and T at which the plate portion comes into contact with the narrow portion 12b when the lid body 2 is rotated and the plate portion 22 is pulled up. 3 on the root portion 22c side and 6 on the distal end portion 22d side, respectively.

  Therefore, the plurality of convex portions 24 as described above can increase the rigidity in the width direction and the longitudinal direction of the plate portion 22 in a well-balanced manner. That is, even if the lid body 2 is rotated and the fitting portion 22a of the plate portion 22 is restrained at the position where the fitting portion 22a is fitted between the bottom surface 12a of the narrowed portion 12 and the narrow width portion 12b, the fitting portion has a width. The plate portion does not easily come off the constricted portion without warping in the direction. Further, even if the lid body 2 rotates and tries to fall further backward due to its own weight, the lid portion does not fall too much backward because the plate portion 22 does not bend too much in the longitudinal direction. Furthermore, even if the lid 2 is opened with strong force, the plate portion 22 may come off from the narrowed portion 12, or the rear lid side wall protrusion 23a of the lid may collide with the projecting portion 11 and bounce off. Without closing, the lid can be held in a more stable state. In addition, for the worker, the effect that the plurality of convex portions 24 are prevented from slipping and the plate portion 22 is easily attached and detached is also exhibited.

  Next, the operation of the lid 2 and the function of the plate portion 22 when the lid 2 of the packaging container is opened and closed will be described with reference to FIGS. Here, FIG. 6 shows a cross-sectional shape of the packaging container before and after the lid 2 is opened and closed. FIG. 7 shows the force applied to the plate portion 22 when the lid 2 is kept open.

  As shown in FIG. 6, when the lid body 2 is closed, the plate portion 22 is close to the rear container flange portion F1. When the lid body 2 begins to open, the lid body rotates about the hinge portion 21 as a fulcrum, and the rear lid side wall protrusion 23a of the lid body abuts on the outer edge of the projecting portion 11. Thereafter, the lid body 2 is rotated so as to fall further backward due to its own weight with the outer edge in contact with the protruding portion 11 as a fulcrum. At this time, the lid body 2 pulls the plate portion upward from the root portion 22 c of the plate portion 22. Then, the plate portion 22 is restrained at a position where the plate portion 22 is fitted between the bottom surface of the narrowed portion and the narrow width portion 12b, and the plate portion is inclined obliquely so that the front end portion 22d contacts the rear container flange portion F1. .

  As shown in FIG. 7, the plate portion 22 contacts the narrow portion 12 b at the contact position T. At this time, a downward force X is applied to the plate portion 22 by receiving a reaction force from the narrow portion 12b. As described above, the plurality of convex portions 24 are separately provided on the base portion 22c side and the tip end portion 22d side of the plate portion 22 with the contact position T interposed therebetween. For this reason, the rigidity of the plate portion 22 at the contact position T is not too high, and an impact force when the plate portion comes into contact with the narrow width portion 12b is absorbed to prevent the plate portion from coming off from the narrowed portion. Furthermore, since the restoring force of the plate portion is weak at the contact position T, the lid body 2 is also prevented from closing unexpectedly.

  Further, as described above, when the lid body 2 is further tilted backward by its own weight, the base portion 22c of the plate portion is attached to the lid body with the contact position T where the plate portion 22 and the narrow width portion 12b contact each other as a fulcrum. Pulled up. At this time, an upward force Y is applied where the hinge 21 and the plate 22 are connected. For this reason, the base portion 22c of the plate portion 22 bends upward. However, since the three convex portions 24 are provided on the side of the base portion, the rigidity is high, and the plate portion on the side of the root portion is excessively bent. I am trying not to. On the other hand, an upward force Z is applied to the front end portion 22d by receiving a reaction force from the rear container flange portion F1. For this reason, in the plate portion 22, the tip portion 22d side across the contact position T bends upward with the contact position as a fulcrum, but six convex portions 24 are provided on the tip portion side. Therefore, the rigidity is high and the plate portion on the side of the tip portion is prevented from being bent excessively.

  Therefore, the lid 2 is bent with the position where the plate portion 22 is in contact with the narrow width portion 12b as a fulcrum, and the force by which the lid turns to fall backward by its own weight is balanced by the bending reaction force of the plate portion. At this point, the rotation of the lid is stopped.

  There is no limitation on the dimensions of the packaging container in the present embodiment. For example, any of a normal size capable of displaying dozens of yakitori, a large size capable of storing a large decoration cake, and a small size capable of storing a sample food. Also applies.

  Since the packaging container in the present invention manages food in a satellite manner, a shopper holding a baggage can easily open and close the lid, and can easily attach and remove the lid to the container body. Since the burden can be reduced, it can be widely used in industries related to food sales.

DESCRIPTION OF SYMBOLS 1 Container main body 11 Protruding part 12 Constriction part 12a Bottom face 12b Narrow width part 2 Lid body 21 Hinge part 22 Plate part 22a Fitting part 22b Overhang part 22c Root part 22d Tip part 23 Rear part side wall 24 Convex part F1 Rear container flange Part F2 Rear lid flange

Claims (8)

A container body made of a thermoplastic resin and a lid,
A container flange is provided on the peripheral edge of the container body, and a plurality of projecting portions projecting upward are provided on one side of the container flange with a predetermined interval along the longitudinal direction of the one side. And a constriction is formed between the protrusions adjacent to each other,
The narrow portion has a narrow width portion formed at a position above the bottom surface,
A lid flange portion that overlaps the container flange portion is provided at the peripheral portion of the lid body, and a hinge portion provided along the longitudinal direction is provided on one side of the lid flange portion, and outward from the one side. A plurality of plate portions projecting from
The plate part is formed with a fitting part located at the root part and a wide projecting part located at the tip part,
The fitting portion of the plate portion is fitted to the narrow portion between the bottom surface of the narrow portion and the narrow portion,
The lid body rotates about the hinge portion as a central axis, and the side wall of the lid body abuts on the projecting portion. The packaging container according to claim 1, wherein a convex portion is provided on a front surface or a back surface of the plate portion. The packaging container according to claim 1, wherein a plurality of convex portions are provided on the front surface or the back surface of the plate portion. The packaging container according to claim 2 or 3, wherein the convex portion is provided from the root portion to the tip portion. The plurality of convex portions are respectively provided on both the base portion side and the tip portion side across a position where the plate portion contacts the narrow width portion. The packaging container according to 3 or 4. The packaging container according to any one of claims 3 to 5, wherein each of the plurality of convex portions has substantially the same shape and the same size. The packaging container according to claim 6, wherein the plurality of convex portions are arranged at equal intervals. The packaging container according to any one of claims 1 to 6, wherein an uneven portion is provided on a bottom surface of the narrowed portion in a direction orthogonal to a longitudinal direction of one side of the container flange portion.

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