JP5711787B2 - Packaging container - Google Patents

Description

  The present invention relates to a packaging container provided with a container body having an upper surface opening and a lid for closing the opening of the container body.

  For example, packaging containers for storing ingredients such as salads and cut fruits and displaying them on display shelves such as supermarkets and convenience stores are widely used. These packaging containers are required to have excellent sealing properties that can be taken home without leakage of moisture from the foodstuffs that are contained. For this reason, those employing an internal fitting structure are often used. In those adopting such an inner fitting structure, an inverted tapered fitting wall portion directed inward toward the upper side is provided around the opening edge of the container body, and the inner surface thereof is configured as an inner fitting surface, Correspondingly, the cover body is also provided with an inversely tapered fitting wall portion that extends outward toward the lower side, and its outer surface is configured as an inner fitting surface. When the lid is closed, the fitting wall portion of the lid enters the inside of the fitting wall portion of the container body and is fitted inside.

  However, the packaging container provided with the inner fitting structure is excellent in sealing performance, but has a drawback that it is difficult to open the lid. In order to improve the difficulty of opening the lid, a knob is formed on the container body or the lid, but the problem remains that it is difficult to open the lid. In particular, since the number of elderly people living alone has increased in recent years, there is a demand for a structure that allows an elderly person to easily open the lid of the packaging container having the inner fitting structure.

  The problem that the lid is difficult to open in the packaging container having the inner fitting structure is considered to be mainly caused by two points. One is that the knob part of the container body and the knob part of the lid body overlap each other in the closed state, so that the knob part of the container body located on the lower side is particularly difficult to see from above. is there. The other is that it is difficult to separately pick the knob part of the container body and the knob part of the lid body in the closed state, particularly when both knob parts are in close contact with each other. It is.

  Patent Document 1 below discloses a packaging container that employs an internal fitting structure. However, since the knob portion of the container body and the knob portion of the lid body are overlapped in close contact with each other in the closed state, it is not easy to pick the knob portions while pulling them up and down. It was difficult to find the knob part of the container body when viewed from above, especially for elderly people.

  Also, Patent Document 2 below discloses a packaging container that employs an internal fitting structure. In the packaging container, since the knob portion of the lid projects outwardly with respect to the flange portion of the container body, the knob portion of the lid body can be easily picked, but the container body It was practically impossible to pick the flange part with a fingertip, and it was very difficult to open, especially for elderly people.

  Further, Patent Document 3 below discloses a configuration in which a gap is formed between the knob portion of the container body and the knob portion of the lid body in the closed state. In this configuration, since the fingertip can be inserted into the gap between the knob portion of the container body and the knob portion of the lid, opening is easier than in the case of the close contact configuration as described above. However, there is a problem in that it is difficult to find the presence of the knob part of the container body because the knob part of the container body is located below the knob part of the lid when viewed from above, especially for elderly people. It is hard to notice its existence. In addition, although a gap is formed between the knob portion of the container body and the knob portion of the lid body, the knob portion of the container body and the knob portion of the lid body are located at the same position when viewed from above. For example, if you pick the knob of the container body with the fingertip of one hand and try to pick the knob of the lid with the fingertip of the other hand, the fingertips of both hands interfere with each other vertically Therefore, it is difficult to pick the knob part of the container body and the knob part of the lid at the same time.

JP 2011-57225 A JP 2002-362598 A Utility Model Registration No. 3087952

  Therefore, the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a packaging container that can be easily opened with an internal fitting structure excellent in sealing performance.

The present invention was made to solve the above problems, and the packaging container according to the present invention includes a container body and a lid formed in a substantially square shape in plan view by thermoforming from a synthetic resin sheet, A packaging container in which a lid is fitted into an opening of a container body, and a body flange portion is provided around an opening edge of the container body, and the body flange portion includes a skirt wall portion extending downward. The skirt wall of at least one of the four corners of the container body has a longitudinal groove-like recess recessed toward the inside, which is the center side of the container body in plan view, and the recess. A pair of left and right bulging knob wall portions that bulge outward in a plan view relative to the recessed portion and can be picked inward and outward with a fingertip, are formed on the lid body. The lid flange located above the main unit flange in the closed state A knob is projected from the lid flange of the corner corresponding to the recessed portion of the four corners of the lid, and the knob is on the upper side of the recessed portion in the closed state. Correspondingly positioned and projecting outward in plan view from the recessed part, the pair of left and right bulging knob wall parts project outward in plan view from the outer edge of the lid flange part in the closed state And The “inner side”, which is the direction in which the recessed portion is recessed, is the center side of the container body in plan view. Moreover, the knob | pick piece of a cover body should just protrude outside with respect to at least the upper end of the recessed part which is a longitudinal groove shape.

  In the packaging container having such a configuration, since the internal fitting structure is adopted, the sealing property is excellent. On the other hand, a concave portion and a pair of left and right bulging knob walls are formed at the corner of the container body, and the bulging knob walls on both sides also protrude because the concave portion is formed in a vertical groove shape. It has a shape that bulges along the vertical direction like a strip. And the knob which protrudes outside from a recessed part is formed in the corner of the lid corresponding to the corner of the container body. Therefore, when the packaging container in the closed state is viewed from above, it is possible to easily find the tab piece that protrudes outward from the recessed portion. In addition, since the recessed part is formed, even if it does not enlarge the knob of a cover body too much, the knob piece of a cover body can be easily protruded outside from a recessed part. In other words, the cover tab is placed in the region inside the extension line so that the cover tab does not protrude outwardly with respect to the extension lines of the four sides of the container body having a substantially rectangular shape in plan view. be able to. Therefore, the packaging container can be displayed efficiently in the vertical and horizontal directions, the appearance of the display is good, and when the purchaser removes the packaging container from the display shelf, it can be smoothly removed without being caught by the adjacent packaging container. it can. In addition, since the pair of left and right bulging knobs protrudes outward from the outer edge of the lid flange portion of the lid, the pair of left and right bulging knobs of the container body when the packaging container in the closed state is viewed from above. The wall can be easily found. That is, when the corner is viewed from above, a total of three protruding parts on the left and right sides, that is, a pair of left and right bulging knob walls and a cover knob between the left and right, can be seen. The part becomes very conspicuous and the opening location can be easily found.

  And in opening, one bulging knob wall part can be picked from the lower side with the fingertip of one hand. Specifically, the index finger of one hand is inserted into the inside of one bulging knob wall from the lower side to hold and support the inner surface of the bulging knob wall, and the thumb of the same hand is bulged. It is pressed against the outer surface of the knob wall, and the index finger and the thumb are used to pinch one bulging knob wall inward and outward. A pair of left and right bulging knob walls and a recessed part located between them are formed at the corners of the flange section of the body, so the strength of the corners is high, and thus the bulging knob walls are stable and stable. Can be picked. Then, the handle of the lid is picked with the fingertip of the other hand, but since the handle of the lid protrudes outward from the recessed portion of the container body, the handle of the lid can be easily picked. it can. Furthermore, since the bulging knob wall portion of the container body and the knob piece of the lid body are displaced from each other on the left and right sides, the fingertips of both hands are unlikely to interfere with each other. While picking the picking wall part, the picking piece of the lid can be easily picked with the other hand. In addition, since a pair of left and right bulging knobs is formed at one corner, it can be easily opened by both right-handed and left-handed people. That is, if you are a right-handed person, for example, you can pick the lid piece with your right hand while opening the left bulging wall with your left hand, and open it with your right hand. While picking the right bulging wall part, it is possible to pick and open the lid with the left hand. In any case, since the bulging knob wall portion of the container body and the knob piece of the lid body are displaced from each other in the closed state, the fingertips of both hands are less likely to interfere with each other and can be easily opened. can do.

  The preferred embodiments are listed below. For example, it is preferable that the vertical length of the skirt wall is longer at the corners than the central part of the side of the container body, and the vertical length of the bulging knob wall can be ensured to be long. The bulging knob wall portion becomes easier to pick. The vertical length of the skirt wall can be increased by making the height of the lower end of the skirt wall substantially constant and the height of the upper end of the skirt wall higher at the corner than at the center of the side. It is preferable to lengthen the corner.

  In that case, as the height of the upper end of the skirt wall portion gradually increases toward the corner portion, the height of the upper end of the skirt wall portion becomes the highest in the pair of left and right bulging knob walls, and the recess between them. In parts, it is relatively lower than those. Accordingly, the pair of left and right bulging knob walls and the recessed portion between them form not only a concave-convex shape in the inner and outer directions, but also a concave-convex shape in the height direction. It becomes more noticeable. In addition, when the height of the upper end of the skirt wall portion is high at the corner portion, an inclined surface portion extending upwardly from the inside toward the upper end of the skirt wall portion is formed on the body flange portion at the corner portion. Therefore, the knob piece of the lid body also inclines upward from the inside toward the outside corresponding to the inclined surface portion, and the knob piece of the lid body becomes more conspicuous. In addition, since the tab of the lid that is inclined upward protrudes outward from the recessed portion that is lower than the bulging knob walls on both sides, the knob of the lid and the bulging knob walls on both sides thereof And are more likely to be discovered.

  Furthermore, it is preferable that the skirt wall portion extends at an angle so that the lower side is at the lower side at least in the bulging knob wall portion and the recessed portion at the corner, and the fingertip can be easily placed inside the bulging knob wall portion. Can be inserted. In addition, if the bulging knob wall and the recessed portion are inclined, the upper end is positioned on the inner side with respect to the lower end of the recessed portion, so that the lid does not protrude from the outer edge of the container body. It is possible to easily increase the amount of protrusion of the body knob.

  Moreover, you may extend a main body knob piece toward the outer side at the lower end of the skirt wall part of the corner part in which the recessed part was formed. Since the corner is formed with a recessed portion, even if the main body knob is formed at the corner of the container body, the main body is outward from the substantially rectangular area in plan view defined by the four sides of the container body. A main body knob can be formed inside the region so that the knob does not protrude. Therefore, the packaging container can be displayed efficiently in the vertical and horizontal directions, and the display state is good. Further, when the purchaser takes out the packaging container from the display shelf, it can be smoothly taken out without being caught by the adjacent packaging container. And when the main body tab is formed at the corner in this way, in addition to the opening method of picking and opening the bulging knob wall as described above, an opening method of picking and opening the main body tab is also adopted. This will increase the number of options for opening. In the case of forming the main body tab, it is preferable that the main body tab protrudes outward from the tab tab in a plan view because the main body tab can be easily found from above.

  As described above, in the packaging container according to the present invention, the bulging knob wall portion of the container body and the knob piece of the lid body are both easily visible from above, and the bulging knob wall of the container body. Since the tab and the knob of the lid can be easily picked, the lid can be easily opened while ensuring excellent sealing performance by the internal fitting structure.

The perspective view which shows the cover closed state of the packaging container in one Embodiment of this invention. The principal part top view which shows the closed state of the packaging container. The top view which shows the container main body of the container for the packaging. The front view which shows the container main body of the container for the packaging. The top view which shows the cover body of the packaging container. Sectional drawing in the open lid state corresponding to PP of FIG. Sectional drawing in the closed state corresponding to PP of FIG. It is a principal part top view which shows the use condition of the packaging container, Comprising: (a) shows the state which pinched the bulging knob wall part of the container main body with the left hand, (b) is the bulging knob wall part of the container main body. Shows the state of being picked with the right hand. The top view which shows the container main body of the container for packaging in other embodiment of this invention. The principal part top view of the container for the packaging. Sectional drawing which shows the closed cover state corresponding to FIG. 7 of the packaging container.

  Hereinafter, a packaging container according to an embodiment of the present invention will be described with reference to FIGS. 2, 6, 7, and 8, the surface of the lid body 2 is illustrated with a large number of dots. The same applies to FIGS. 10 and 11 described later.

  The packaging container according to the present embodiment can store foods as various objects to be stored, and can be attached to and detached from the container body 1 so as to close the container body 1 having an upper surface opening and the opening of the container body 1. And a configured lid 2. Both the container body 1 and the lid body 2 are formed by thermoforming a synthetic resin sheet. Therefore, in principle, the inner surface and the outer surface are in an integrated relationship, and if the inner surface is convex, the corresponding portion of the outer surface is concave. Although the foodstuff as a to-be-contained object is not specifically limited, The foodstuff containing water | moisture contents, such as a salad and a cut fruit, is suitable, and since the internal fitting structure is employ | adopted so that it may mention later, it contains liquids, such as a water | moisture content. Even when food is stored, the liquid is unlikely to spill during take-away.

  The container body 1 has a substantially square shape in plan view, and is typically a substantially square or a substantially rectangular shape. In the present embodiment, a substantially square shape is illustrated. As shown in FIGS. 3, 4, and 6, the container body 1 includes a bottom surface portion 10, a side wall portion 20 that rises upward while expanding from a peripheral edge portion of the bottom surface portion 10, and the side wall portion 20. And a main body flange portion 30 extending outward from the upper end of the main body.

  The bottom surface portion 10 may have various shapes such as a polygon such as a square, an ellipse, and a circle. For example, even in the case of a square, each side is not linear but curved outwardly or inside. It may be convexly curved. The bottom surface portion 10 has a substantially square shape in the present embodiment. The bottom surface portion 10 is divided into a peripheral region (outer region) and a central region (inner region), and the peripheral region is a ground surface portion 11 that comes into contact with the placement surface when the container body 1 is placed on the placement surface. Engagement projections 13 are formed at the four corners of the peripheral edge of the ground contact surface 11 so as to project outwardly in a tapered manner. The central region is a region surrounded by the ground surface portion 11 and is a raised bottom portion 12 as a non-ground surface that is recessed upward from the inner edge of the ground surface portion 11 so as not to contact the placement surface. Contained objects such as fine foods remaining on the inner surface of the bottom surface portion 10 are easily gathered from the inner surface of the bottom portion 12 to the inner surface of the grounding surface portion 11 and can be easily taken out. The shape of the raised bottom portion 12 is arbitrary and may be omitted. Further, the bottom surface portion 10 may be formed with a convex portion for suppressing the movement of the object to be accommodated, a concave groove for storing the drip, or the like, if necessary. It also serves to reinforce the bottom surface portion 10.

  The side wall portion 20 only needs to have an inner fitting structure at the opening edge portion. For example, the side wall main portion 21 rising upward from the outer edge of the grounding surface portion 11 of the bottom surface portion 10 and a step above the side wall main portion 21 are provided. A side wall upper portion 23 formed via the portion 22 and a fitting wall portion 25 formed above the side wall upper portion 23 via a tapered portion 24 can be provided. A phenomenon (blocking phenomenon) in which the upper container main body 1 is tightly fitted to the lower container main body 1 and is not separated when a plurality of container main bodies 1 are overlapped with each other at predetermined positions on the outer surface of the upper end of the side wall main portion 21. ) To prevent blocking) 26 is formed. As shown in FIGS. 3 and 4, the anti-blocking protrusions 26 are formed at a plurality of locations at intervals in the circumferential direction, and are not arranged at regular intervals. It is formed so as to be shifted in the direction.

  The fitting wall portion 25 is a portion constituting the opening edge of the container body 1 and is inclined in a reverse taper shape gradually toward the inner side (center side of the container) toward the upper side. It becomes an inner fitting surface on the container body 1 side. In addition, a conventionally well-known rib may be formed in the side wall part 20, for example, you may form the rib of a protrusion and a concave rib extended in an up-down direction suitably.

  A main body flange portion 30 extending outward is provided around the upper end portion of the side wall portion 20. The main body flange portion 30 has a substantially square shape in a plan view, and therefore, the shape of the container main body 1 in a plan view has a substantially square shape as a whole.

  The shape and configuration of the main body flange portion 30 may be various. For example, an inclined surface portion that gradually rises from the upper end of the fitting wall portion 25 of the side wall portion 20 toward the outside. 31 and a skirt wall portion 32 extending downward from the upper end of the inclined surface portion 31. The height of the top portion of the main body flange portion 30 may be constant in the circumferential direction, but is the highest at the four corners, and is located in the middle between the corners (each of the four sides). It is preferable to make it lowest in the middle part). As described above, when the main body flange portion 30 includes the inclined surface portion 31 and the skirt wall portion 32, the height of the top portion of the main body flange portion 30 is the height of the upper end 32a of the inclined surface portion 31 and the skirt wall portion 32. Accordingly, the height of the upper end 32a of the skirt wall portion 32 is the highest at the four corners and the lowest at the center of the side. In the present embodiment, the height is particularly directed from the center of the side toward the four corners. It is getting higher gradually. Therefore, the inclination angle of the inclined surface portion 31 is the smallest at the center of the side and is an inclination angle close to horizontal. The inclination angle at the center of the side may be 0, that is, horizontal. The inclination angle of the inclined surface portion 31 gradually increases from the side center to the corner, and is maximum at the corner. The inclined surface portion 31 may be formed in a straight line shape in a longitudinal sectional view, or may be curved outwardly or inwardly, but in a corner, it should have a bulging shape that is curved outwardly. Can do.

  The skirt wall portion 32 is provided so as to form a predetermined gap between the skirt wall portion 32 and the upper outer surface of the side wall portion 20. The skirt wall portion 32 may extend vertically downward, but it is preferable that the skirt wall portion 32 is inclined and inclined so as to gradually become the outer side as in the present embodiment. Further, it is preferable that the lower end 32b of the skirt wall portion 32 has a substantially constant height. Although the height of the lower end 32b of the skirt wall part 32 is arbitrary, it can be made into the height of the upper end of the fitting wall part 25, for example, However, You may extend the skirt wall part 32 further rather than that. As described above, when the height of the upper end 32a of the skirt wall 32 is higher at the corner than at the side center, the vertical length of the skirt wall 32 is longer at the corner than at the side center. In this embodiment, the length gradually increases from the side center to the corner, and is the maximum length at the corner. The length in the vertical direction of the skirt wall portion 32 at the corner is preferably 5 mm or more, and more preferably 20 mm or less.

  The skirt wall 32 in at least one of the four corners is formed with a recess 33 and a pair of left and right bulging knob walls 34 located on both sides thereof. The corner where the concave portion 33 and the bulging knob wall 34 are formed may be at least one of the four, but when the container body 1 is substantially rectangular, preferably two corners on the diagonal line Even in the case of a substantially square shape as in the present embodiment, the two corners on the diagonal line can be formed, but it is more preferable that all four corners be formed. When the container body 1 is substantially rectangular, the container body 1 can be rotated 180 degrees around the vertical axis by providing the recessed portion 33 and the bulging knob wall portion 34 at two diagonal corners. When the same state is obtained and the container main body 1 is substantially square, the container main body 1 is rotated about the vertical axis by providing the recessed portions 33 and the bulging knob wall portions 34 at all four corners. The same state can be obtained even if rotated 90 degrees, and the same state can be obtained even if rotated 90 degrees, so that the display work is facilitated and the attaching work of the lid 2 is facilitated.

  The recessed portion 33 is formed at the center in the left-right direction at the corner. That is, the recessed portion 33 is located on the diagonal line of the container body 1. The recessed portion 33 has a shape recessed toward the inside, and specifically has a longitudinal groove shape extending in the vertical direction, and is formed from the upper end 32 a to the lower end 32 b of the skirt wall portion 32. Since the skirt wall portion 32 is inclined outward, the recessed portion 33 is also inclined outward. Therefore, the lower end is positioned outward with respect to the upper end of the recessed portion 33. Although the cross-sectional shape of the recessed part 33 is arbitrary, Preferably it is circular arc shape of an outer side concave (inner convex).

  The bulging knob wall portions 34 formed on both the left and right sides of the recessed portion 33 are preferably the same shape, and are preferably bilaterally symmetric about the recessed portion 33. The bulging knob wall portion 34 has a shape that bulges outward relative to the recessed portion 33, extends like a ridge in the vertical direction, and is formed from the upper end 32 a to the lower end 32 b of the skirt wall portion 32. ing. Since the skirt wall portion 32 is inclined outward, the bulging knob wall portion 34 is also inclined outward. Therefore, the lower end is positioned outward with respect to the upper end of the bulging knob wall portion 34. . Further, since the recessed portion 33 is formed between the bulging knob wall portions 34 and the inclined surface portion 31 is formed on the inner side of the skirt wall portion 32, it is more than the upper end of the bulging knob wall portion 34. The upper end of the recessed portion 33 is lowered. That is, the height of the upper end 32a of the skirt wall portion 32 is the highest at the upper end of the bulging knob wall portion 34, and is lowered by a predetermined height like a valley at the upper end of the recessed portion 33 therebetween. The upper end of the bulging knob wall 34 forms a pair of left and right ridges, and a trough formed from the upper ends of the recessed portions 33 is formed between the left and right ridges. The cross-sectional shape of the bulging knob wall 34 is also arbitrary, but is preferably an outwardly convex (inner concave) arc shape, for example, with a degree of curvature that is approximately along the fingerprint side of the index finger. 2 is an imaginary line A in which the outer edge of the main body flange portion 30 is linearly extended, but the bulging knob wall portion 34 is an area defined by the two imaginary lines A. From the outside in a plan view.

  It is preferable that an edge portion extends from the lower end 32b of the skirt wall portion 32 toward the outside. The edging portion is a portion that becomes an outer edge of the main body flange portion 30, and thus constitutes a portion that becomes the outermost peripheral edge of the container main body 1. It is preferable that the height of the edge portion is substantially constant over the entire circumference. Moreover, it is preferable that an edge part is provided over a perimeter, and the main body flange part 30 can be effectively reinforced by the perimeter edge part. The edge portion is preferably provided substantially horizontally, and the width thereof can be as thin as, for example, about 1 mm to 2 mm. Further, it is preferable to form a concavo-convex shape on the upper surface of the edging portion by performing fine concavo-convex processing and embossing at the same time when the container body 1 is thermoformed, and in particular, a sine wave, a triangular wave, a trapezoid in a side view It is preferable to form in a waveform shape such as a wave. For example, an uneven shape is formed on the upper surface of the edging portion by continuously forming peaks and valleys along the width direction of the rim portion on the upper surface of the rim portion alternately in the circumferential direction. Can do. The uneven shape on the upper surface of the border portion can be formed, for example, by various knurled eyes such as flat knurled eyes and twill knurled eyes, and in particular, can be formed by twill knurled eyes so as not to slip. preferable.

  The edge of the edge is a sheet cutting surface cut with a cutting blade during sheet forming. By forming an uneven shape on the upper surface of the edge, the upper edge line (upper contour line) of the sheet cutting surface is edged. Corresponding to the concavo-convex shape of the upper surface of the part, it has a wavy shape that snakes up and down in a side view (or front view). In this way, the upper edge line of the edging portion has a wave shape when viewed from the side, so that the fingertip touching the container can be protected and the strength of the edging portion, that is, the strength of the sheet edge can be improved. It is possible to effectively prevent tearing starting from the outer edge of the edging portion. Therefore, it is preferable that the embossed edge portion is formed on the entire circumference of the main body flange portion 30. The uneven shape on the upper surface of the edge portion may be formed so as to continue from the edge portion to the skirt wall portion 32. The lower surface of the edging portion may be a flat surface, but it is preferable to form an uneven shape on the lower surface corresponding to the unevenness of the upper surface.

  In addition, you may employ | adopt the reinforcement structure represented by the various reinforcement ribs for the main body flange part 30, for example, the reinforcement rib extended in an inward / outward direction can be formed. Moreover, you may form the pattern by various uneven | corrugated shape in the main body flange part 30. FIG.

  Next, the configuration of the lid body 2 will be described. The lid 2 has a structure that fits inside the container body 1 and has a substantially square shape (specifically, a substantially square shape) in plan view corresponding to the container body 1. The lid 2 includes, for example, a top surface portion 50, a lid side wall portion 51 that hangs downward from the peripheral edge of the top surface portion 50, and a substantially horizontally extending outward from the lower end of the lid side wall portion 51. A groove bottom portion 52 provided, a fitting wall portion 54 extending upward so as to be folded back upward from a taper portion 53 extending obliquely upward and outward from the outer edge of the groove bottom portion 52, and the fitting wall portion A lid flange portion 56 that extends outwardly through a chamfered portion 55 may be provided at the upper end of 54.

  The top surface portion 50 has a substantially square shape in plan view (specifically, substantially square shape), and a lateral displacement of the upper packaging container when the packaging containers are stacked on the periphery of the upper surface thereof. It is preferable that a guard protrusion 57 for suppressing the protrusion is provided so as to protrude upward. In FIG. 5, the bottom surface portion 10 of the container body 1 is indicated by a two-dot chain line, but the guard projection 57 is a side wall portion of the container body 1 in a state where the bottom surface portion 10 of the container body 1 is placed on the top surface portion 50. The lower end of 20 is guarded from the outside, and the lateral displacement of the container body 1 is suppressed. Therefore, the guard protrusion 57 may be configured so as to guard the lower end portion of the side wall portion 20 of the container body 1, and its shape and arrangement are arbitrary, and may be formed annularly over the entire circumference. However, it may be formed only in a predetermined range of the entire circumference as in this embodiment. For example, it is also preferable to form the guard protrusions 57 at the four corners of the top surface portion 50. For example, a pair of left and right island-shaped guard protrusions 57 may be formed at the four corners. Moreover, you may make it form the engaging part 58 in which the engagement convex part 13 of the container main body 1 can engage with the guard protrusion 57 from the inner side. The shape of the engaging portion 58 may be various as with the shape of the guard protrusion 57. For example, in the configuration in which the left and right island-shaped guard protrusions 57 are formed at the corner as shown in FIG. An engaging portion 58 can be formed between the protrusions 57. By engaging the engaging convex portion 13 with the engaging portion 58 on the upper surface of the lid body 2, it is possible to more reliably prevent the lateral displacement of the packaging container during stacking, and stable stacking A state is obtained.

  It is preferable to form a plurality of anti-blocking protrusions 59 on the lower end of the outer surface of the lid side wall 51 as in the case of the container body 1. Note that, for example, a pair of left and right bulging protrusions 62 bulging outward may be formed at the corners of the lid side wall 51. When the bulging protrusion 62 is formed at the corner of the lid side wall 51, the strength at the corner of the lid side wall 51 is increased, and the operation of removing the lid 2 from the container body 1 is facilitated. Further, the fitting wall portion 54 is fitted into the fitting wall portion 25 of the container body 1 and is gradually inclined inwardly upward corresponding to the fitting wall portion 25 of the container body 1. It is formed in the reverse taper shape, and the outer surface becomes an inner fitting surface. As shown in FIG. 7, the fitting wall portion 54 of the lid body 2 is fitted and fitted so as to enter the inside of the fitting wall portion 25 of the container main body 1, and thereby the opening of the container main body 1 is set inside. To seal all around. The tapered portion 53 of the lid body 2 has an inclination angle corresponding to the tapered portion 24 of the container body 1, and the tapered portion 53 of the lid body 2 and the tapered portion 24 of the container body 1 overlap in the closed state. It will be in a state or it will be in the state which opposes through some clearance gaps. By providing the tapered portion 53 on the lid body 2, the lid body 2 can be smoothly fitted to the container body 1.

  The lid flange portion 56 is located on the upper side of the main body flange portion 30 in the closed state and overlaps. Therefore, the lid flange portion 56 has a shape corresponding to the main body flange portion 30 in plan view, and has a substantially square shape (specifically, substantially square shape) in plan view, like the main body flange portion 30. Specifically, the lid flange portion 56 is overlaid on the inclined surface portion 31 of the main body flange portion 30 in the closed state. The lid flange portion 56 extends substantially horizontally as shown in FIG. 6 in the opened state, but the inclined surface portion 31 of the main body flange portion 30 is inclined, so that the lid flange portion 56 is shown in FIG. 7 in the closed state. In this state, it is bent and deformed upward along the inclined surface portion 31 to be inclined. The width of the lid flange portion 56 is narrow so as not to protrude outward from the outer edge or upper end of the inclined surface portion 31 of the main body flange portion 30. For example, the width of the lid flange portion 56 is approximately half of the inclined surface portion 31 of the main body flange portion 30. It can be a width.

  A knob 60 is formed on the lid flange portion 56 at at least one of the four corners of the lid body 2. The knob 60 is located above the recessed portion 33 of the container body 1 in the closed state. Therefore, when the recessed part 33 is formed in all the four corners of the container main body 1, it is preferable that the cover 2 also forms the knobs 60 in all of the four corners correspondingly. In this embodiment, since it is substantially square in plan view and does not have vertical and horizontal directions, the knob 60 may be formed only at one of the four corners, or may be formed at two or three. Good. In addition, when making the container main body 1 and the cover body 2 into a substantially rectangular shape in plan view, the recessed portion 33 and the bulging knob wall portion 34 are formed at two corners on the diagonal line, and the knob piece 60 is also formed in the container main body. Preferably, it is formed at two corners on the diagonal line corresponding to 1.

  It is preferable that the knob 60 protrudes outward at an angle of approximately 45 degrees with respect to the four sides. The fitting wall portion 25 of the container body 1 and the fitting wall portion 25 of the lid body 2 are arcuate in plan view at the four corners, and therefore the width of the lid flange portion 56 is excluding the four corner portions. Although it is substantially constant, the width at the four corners is wider than the other parts, and the knobs 60 are projected outward using the regions. Specifically, as shown in FIG. 5, the fitting wall portion 54 of the lid body 2, that is, the inner edge of the lid flange portion 56 has a shape that is chamfered in an arc shape at the corner. The outer edge of the lid flange portion 56 also gradually enters the inside from the center of the side toward the corner according to the chamfered shape of the inner edge, but the corner does not follow the chamfered shape of the inner edge, but conversely from the inner edge to the outside. The knob 60 is formed so as to protrude in a tongue-like shape. A straight line indicated by a two-dot chain line in FIG. 5 is an imaginary line B in which the outer edge of the lid flange portion 56 is linearly extended from the center of the side, and the knob 60 is defined by two adjacent imaginary lines B. It is preferable to form in the region so as not to protrude outward from the region. Thus, since the inner edge of the lid flange portion 56 is chamfered in an arc shape at the corner, the amount of protrusion to the outside of the lid flange portion 56 at the corner can be increased, and the knob piece The amount of protrusion of 60 can be easily secured. The shape of the knob 60 is arbitrary and is not limited to the shape of a tongue. For example, it may be a tapered triangular shape or a semicircular shape, or may be a shape that protrudes outward with a substantially constant width. Good.

  As shown in FIG. 2, the knob 60 is positioned corresponding to the recessed portion 33 of the container body 1 in the closed state, and its tip protrudes outward from the upper end of the recessed portion 33 by a predetermined length. . Although the knob 60 is located on the recessed portion 33, the bulging knob walls 34 are positioned so as to protrude outward on the left and right sides of the knob 60, respectively. 60 is not covered. Accordingly, when the corner is viewed from above, both the bulging knob wall portions 34 protrude outward from the outer edge of the lid flange portion 56 and are in a state where they can be directly recognized without using the knob piece 60. When the recessed portion 33 is inclined, the lower end is positioned outside the upper end, and in FIG. 2, the tip portion of the knob piece 60 protrudes outside the lower end of the recessed portion 33. It is only necessary that the tip portion of the knob 60 protrudes outward from at least the upper end of the recessed portion 33. Moreover, although the straight line shown with the dashed-two dotted line in FIG. 2 is the imaginary line A which extended the outer edge of the main body flange part 30 linearly, even when it is a case where the protrusion amount of the knob piece 60 is enlarged, it is a corner part. It is preferable that the tip of the knob 60 does not protrude outward from the region defined by the two virtual lines A in plan view.

  In addition, it is preferable that the hemispherical convex part 61 protrudes in the lower surface of the knob | pick piece 60 toward the downward direction, for example. When the convex portion 61 is formed on the lower surface of the knob piece 60, the knob piece 60 is lifted up by a predetermined amount without being in close contact with the inclined surface portion 31 in the closed state, so that the knob piece 60 is further easily picked. In addition, the knob piece 60 is bent upward so as to follow the inclined surface portion 31 in the closed state. However, by forming the convex portion 61 on the lower surface of the knob piece 60, the knob piece 60 is inclined. The angle becomes even larger and more noticeable, and at the same time it becomes easier to pick. The convex portion 61 is preferably formed in the vicinity of the proximal end portion of the knob piece 60 or in the vicinity of the inner edge of the lid flange portion 56. Further, by forming the convex portion 61 on the knob piece 60 in this way, it also serves to prevent slipping when the knob piece 60 is picked. The knob piece 60 may be subjected to various other anti-slip processing.

  In addition, it is preferable to form the uneven | corrugated shape extended in an inward / outward direction also on the upper surface and lower surface of the lid flange part 56 similarly to the edge part of the main body flange part 30 over the perimeter. The uneven shape may be formed over the entire width of the lid flange portion 56 of the lid body 2 or may be formed only in the outer region of the total width.

  The container body 1 and the lid body 2 are formed by so-called sheet molding. Sheet molding includes, for example, vacuum forming, pressure forming, vacuum pressure forming, double-sided vacuum forming, hot plate forming and the like, and in any case, it is formed by thermoforming a synthetic resin sheet. Here, examples of the synthetic resin sheet include a polyester resin such as polyethylene terephthalate, a styrene resin such as polystyrene, a sheet composed of a polyolefin resin such as polypropylene and polyethylene, and a stretched sheet obtained by stretching these. It is done. In addition, a synthetic resin foam sheet obtained by foaming the above-described synthetic resin, or a laminated sheet obtained by appropriately laminating a synthetic resin film thereon can also be used. A transparent sheet is preferable because the contents are highly visible. Examples of the transparent sheet include a sheet composed of the various synthetic resins described above and a stretched sheet obtained by stretching these. In addition, the synthetic resin sheets used for the container body 1 and the lid body 2 may be the same as or different from each other.

  As described above, in the packaging container according to this embodiment, when the packaging container in the closed state is viewed from above, the recess 33 is formed at the corner of the container body 1, and the recess 33 Since the knob 60 protrudes outside, the knob 60 can be easily found. Further, since the bulging knob wall portions 34 are located on both sides of the knob piece 60 and protrude outward from the outer edge of the lid flange portion 56, the bulging knob wall portion 34 can be easily found. That is, when the corner portion is viewed from above, both the bulging knob wall portions 34 of the container body 1 and the knob pieces 60 of the lid body 2 between them become a part projecting to the outside in a total of three side by side, The existence of the corner becomes very conspicuous, and the corner that is the unsealed portion can be easily recognized at a glance.

  When the height of the upper end 32a of the skirt wall portion 32 is gradually increased from the center of the side toward the corner, the height of the upper end 32a of the skirt wall portion 32 is equal to the pair of left and right bulging knob wall portions. It becomes the highest in 34, and becomes relatively lower than them in the recessed part 33 in the meantime. Therefore, the upper end of the pair of left and right bulging knob wall portions 34 and the upper end of the recessed portion 33 therebetween form not only an uneven shape in the inner and outer directions, but also an uneven shape in the height direction. The corner of the main body 1 becomes more noticeable, and the knob 60 of the lid 2 becomes even more noticeable. Further, when the inclined surface portion 31 is formed on the lid flange portion 56, the knob piece 60 of the lid body 2 also inclines upward from the inside toward the outside corresponding to the inclined surface portion 31 in the closed state. 60 will be even more noticeable.

  When opening, the fingertip of one hand, for example, the index finger and the thumb is used to grip one bulging knob wall 34 from the lower side, and the fingertip of the lid 2 is picked by the fingertip of the other hand. The body 2 can be easily removed from the container body 1. Since the bulging knob wall portion 34 protrudes outward from the outer edge of the lid flange portion 56, it can be easily picked while visually checking the bulging knob wall portion 34 from above. Similarly, the knob piece 60 is also a container. Since it protrudes outside from the recessed part 33 of the main body 1, it can be picked easily. In addition, a pair of left and right bulging knob walls 34 and a recessed portion 33 are formed at the corners of the main body flange 30 to increase the strength of the corners. Then, the picking piece 60 can be pulled upward and separated.

  Furthermore, since the bulging knob wall 34 and the knob 60 are displaced from each other on the left and right sides, the fingertips of both hands are unlikely to interfere with each other, and the bulging knob wall 34 is picked with one hand. The pick piece 60 can be easily picked with the other hand. In addition, since the left and right bulging wall portions 34 are formed at one corner, it can be easily opened by both right-handed and left-handed people. That is, if it is a right-handed person, as shown in FIG. 8A, the left hand, for example, the thumb L1 and the index finger L2 is used to pick the left bulging knob 34 and the right hand is used to pick and hold the knob 60. Can do. If the person is a left-handed person, as shown in FIG. 8B, the right hand, for example, the thumb R1 and the index finger R2 may be used to grasp the right bulging wall portion 34, and the left hand to pick the tab 60 and open it. it can. In any case, since the bulging knob wall 34 and the knob piece 60 are displaced from each other in the left-right direction in the closed state, the fingertips of both hands are less likely to interfere with each other and can be easily opened. it can.

  The knob 60 extends substantially horizontally in the initial state before being closed, and is pushed relatively upward by the inclined surface portion 31 of the main body flange portion 30 when being in the closed state. Elastically deforms in an upwardly inclined state. The knob 60 in the inclined state is about to return to the original substantially horizontal initial state due to the elasticity of the sheet. Therefore, the knob 60 contacts the inclined surface portion 31 of the main body flange 30 by its own elastic restoring force. Kept in a state. Therefore, the knob piece 60 does not stand up from the inclined surface portion 31 of the main body flange portion 30 and rises greatly, and the lid 2 is prevented from being unintentionally opened.

  In addition, when the vertical length of the skirt wall portion 32 is longer at the corner portion than the central portion of the side, it is easy to ensure a long vertical length of the bulging knob wall portion 34 and the skirt wall portion 34 is inflated. This makes it easier to pick the protruding wall portion 34. Furthermore, if the bulging knob wall 34 extends obliquely downward toward the outside, the fingertip can be easily inserted into the bulging knob wall 34.

  In addition, since the recessed part 33 is formed, even if it does not enlarge the knob piece 60 too much, the knob piece 60 can be easily protruded outside from the recessed part 33. That is, the extension line is arranged so that the knob 60 does not protrude outwardly with respect to the extension lines of the four sides of the container body 1 having a substantially square shape in plan view (the phantom line A indicated by a two-dot chain line in FIG. 2). Even when the knob 60 is placed in the inner region of the knob, the knob 60 can be easily projected outward from the recessed portion 33. Therefore, the packaging container can be displayed efficiently in the vertical and horizontal directions, the appearance of the display is good, and when the purchaser removes the packaging container from the display shelf, it can be smoothly removed without being caught by the adjacent packaging container. it can. Similarly, even if the bulging knob wall portion 34 protrudes outward from the outer edge of the lid flange portion 56, it does not interfere with display because it is located on the inner side with respect to the extension line of the side portion of the container body 1.

  Further, when the recessed portion 33 is inclined, the upper end is positioned on the inner side with respect to the lower end of the recessed portion 33, so that the knob 60 has a range that does not protrude outward from the outer edge of the container body 1. The amount of protrusion can be easily increased. In addition, when the recessed part 33 is inclined, the front-end | tip part of the knob | pick piece 60 is located between the upper end and lower end of the recessed part 33 instead of protruding outside from the lower end of the recessed part 33 in planar view. Form is also preferred. Since the recessed portion 33 is formed, the bulging knob wall portions 34 on both sides serve as guard walls even if the knob 60 protrudes outward from the recessed portion 33, so that the recessed portion 33 is not inclined or not. In addition, it is possible to prevent the knob piece 60 from colliding with the adjacent packaging container or other member, but when the concave portion 33 is further inclined, the tip portion of the knob piece 60 is a concave portion in plan view. If it is located between the upper end and the lower end of 33, the lower end of the recessed portion 33 also becomes a guard wall of the knob piece 60, so that it can be more reliably prevented from colliding with other members of the knob piece 60, In addition, the lid 2 can be prevented from being unintentionally opened.

  In addition, you may extend the main body knob piece 70 toward the outer side like FIG. 9-11 in the lower end 32b of the skirt wall part 32 of the corner part in which the recessed part 33 was formed. Since the recessed portion 33 is formed at the corner, even if the main body gripping piece 70 is formed at the corner, the concave portion 33 is formed outward from the substantially rectangular region in plan view defined by the four sides of the container main body 1. The main body tab 70 can be easily formed inside the region so that the main body tab 70 does not protrude. In FIG. 9, the main body knob 70 is formed at all four corners, but only one of the four corners may be formed, or only two or three may be formed. Also, for example, a hemispherical convex portion 71 may be provided on the upper surface of the main body knob piece 70 in the same manner as the convex portion 62 of the knob piece 60 of the lid 2, or other anti-slip processing may be performed.

  When the main body knob 70 is formed at the corner, the bulging knob wall 34 can be picked from the bottom as described above, and the main knob 70 is further removed as shown in FIGS. You can also open it. When the main body knob 70 is formed at the corner, as shown in FIGS. 10 and 11, the main body tab 70 protrudes outward from the tab 60 of the lid 2 in plan view. This is preferable because the knob 70 can be easily found and the main knob 70 can be easily picked. Further, when the knob piece 60 of the lid body 2 is inclined along the inclined surface portion 31 of the main body flange portion 30, the vertical direction between the knob piece 60 of the lid body 2 and the main body knob piece 70 as shown in FIG. As the distance increases, the angle of picking also differs. Therefore, when the picking piece 60 of the lid 2 is picked by the other hand while the main picking piece 70 is picked by one hand, the picking piece 60 of the lid 2 is picked. It becomes easy. 10 and 11, as an example, a state where the main body gripping piece 70 is picked with the thumb L1 and the index finger L2 of the left hand is indicated by a two-dot chain line.

  In addition, although what demonstrated only the inner fitting structure was demonstrated, what employ | adopted the outer fitting structure with the inner fitting structure may be used. For example, the lid skirt wall 56 may be provided with a lid skirt wall portion that is suspended so as to be externally fitted to the skirt wall portion 32 of the main body flange portion 30. As an example, the lid skirt wall portion is placed at an appropriate position of the lid flange portion 56 (for example, a location near the center of the side of the bulging knob wall portion 34) so as to cover the outside of the skirt wall portion 32 of the main body flange portion 30. It is possible to provide an external fitting structure by extending a locking projection for locking from the lower side to the lower end 32b of the skirt wall 32 of the main body flange 30 on the inner surface of the lid skirt wall. .

DESCRIPTION OF SYMBOLS 1 Container body 2 Cover body 10 Bottom face part 11 Ground surface part 12 Raised bottom part 13 Engaging convex part 20 Side wall part 21 Side wall main part 22 Step part 23 Side wall upper part 24 Taper part 25 Fitting wall part 26 Anti-blocking protrusion 30 Main body flange Part 31 inclined surface part 32 skirt wall part 32a upper end 32b lower end 33 recessed part 34 bulging knob wall part 50 top surface part 51 side wall part 52 groove bottom part 53 taper part 54 fitting wall part 55 chamfering part 56 lid flange part 57 guard projection 58 Engagement part 59 Anti-blocking protrusion 60 Knob piece 61 Convex part 62 Swelling protrusion 70 Main body picking piece 71 Convex part A Virtual line B Virtual line L1 Thumb L2 Index finger R1 Thumb R2 Index finger

Claims (3)

A packaging container comprising a container body and a lid formed in a substantially rectangular shape in plan view by thermoforming from a synthetic resin sheet, and the lid is fitted into the opening of the container body,
A body flange portion is provided around the opening edge of the container body, and the body flange portion includes a skirt wall portion extending downward,
The skirt wall portion of at least one of the four corners of the container body has a longitudinal groove-like recess recessed toward the inside that is the center side of the container body in plan view, and left and right sides of the recess. A pair of left and right bulging knob walls that are located on both sides and bulge outward in a plan view relative to the recessed portion and can be pinched inward and outward with a fingertip ,
The lid body is provided with a lid flange portion positioned on the upper side of the main body flange portion in the closed state. Of the four corner portions of the lid body, a knob is provided at the corner flange flange portion corresponding to the recessed portion. The protruding piece is positioned corresponding to the upper side of the recessed portion in the closed state and protrudes outward in a plan view from the recessed portion,
The packaging container, wherein the pair of left and right bulging knob wall portions protrudes outward in plan view from the outer edge of the lid flange portion in the closed state. The main body flange portion includes an inclined surface portion that rises while gradually inclining from the upper end of the side wall portion of the container main body toward the outside, and a skirt wall portion that extends downward from the upper end of the inclined surface portion. The packaging container according to claim 1. The packaging container according to claim 1 or 2, wherein a cross-sectional shape of the bulging knob wall portion is an outer convex arc shape and is curved so that a portion on the fingerprint side of the index finger is along.

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