JP2013052884A - Paper container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper container capable of preventing a tongue piece from falling out of a cut and assemble the container by joining mutually adjacent sidewall plates together surely and firmly.SOLUTION: The paper container includes a first lock mechanism 10 for joining the sidewall plates 3a, 3b mutually adjacent together by inserting the tongue piece 11 into the cut 12 for engaging upon assembly of the paper container B. The paper container further includes: a cutout 16 formed on a corner part folding line 6 in a manner of retreating from an upper end to a lower end side of the sidewall plate 3a; and an engaging projection 17 formed on an upper end side of the other sidewall plate 3b and extending outward from a side end of the sidewall plate 3b in the lateral direction T2. The paper container is provided with a second lock mechanism 20 restricting relative displacement of the sidewall plates 3a, 3b mutually adjacent, when a force is applied in the direction S1 loosening the locking performed by the first lock mechanism 10, by inserting the engaging projection 17 into the cutout 16 for engagement upon assembly of the paper container B.

Description

  The present invention relates to a paper container that is assembled by folding a single blank (punched paperboard) and used for packaging food or the like.

  Conventionally, trays or box-shaped containers made of plastic or polystyrene foam are frequently used for packaging foods. On the other hand, plastic and styrene foam containers are being collected and reused, but there are significant problems in disposal such as the generation of toxic gas during incineration.

  For this reason, in recent years, cases of employing paper containers as food packaging containers have been increasing. Further, this type of paper container includes, for example, a polygonal bottom plate (1) and a side wall plate (3) connected to each side of the bottom plate (1) via a side wall plate folding line (2). A blank (punched paperboard) (4) is manufactured, the side wall plate (3) of this blank (4) is bent along the side wall plate crease line (2), and in a tray or box shape in an in-line box making process. (See FIGS. 15 and 16). In addition, an overlapping portion (7) extending outward in the lateral direction (T1) via the corner crease line (6) is formed on the side end side of one side wall plate (3a) adjacent to each other, By folding the overlapping portion (7) of the side wall plate (3a) at the corner crease line (6) and overlaying it on the other side wall plate (3b), and bonding the overlapping portion (7) with an adhesive, Adjacent side wall plates (3a, 3b) are joined together.

  On the other hand, for example, as shown in FIGS. 15 to 17, the adjacent portions of the side wall plates 3 a and 3 b are not bonded by adhering the overlapping portion 7 with an adhesive, but are adjacent to each other by a lock mechanism (first lock mechanism) 10. There is a paper container A in which the side wall plates 3a and 3b are detachably locked and coupled (see, for example, Patent Document 1 and Patent Document 2). This locking mechanism 10 includes a tongue piece (hook) 11 that gradually extends upward from the side end of the overlapping portion 7 of one side wall plate 3a toward the outer side in the lateral direction T1, and the other side serving as a corner portion of the paper container A. It is formed of a notch 12 provided at a predetermined position inside the lateral direction T2 from the side end of the side wall plate 3b and formed so as to penetrate from one surface of the other side wall plate 3b to the other surface.

  Then, as shown in FIG. 17, the paper container A provided with such a locking mechanism 10 folds the overlapping portion 7 of one side wall plate 3a at the corner crease line 6 and overlaps the other side wall plate 3b. When aligning, when the tongue piece 11 of one side wall plate 3a is inserted into the notch 12 from one surface side of the other side wall plate 3b and brought out to the other surface side of the other side wall plate 3b, the overlapping portion 7 side of the tongue piece 11 is moved. The facing locking end 11a is hooked on the locking receiving end 12a of the cut 12 portion, the tongue piece 11 is locked to the cut 12 portion, and the adjacent side wall plates 3a, 3b are joined together.

  Thereby, the paper container A provided with the lock mechanism 10 can easily assemble the paper container A by connecting the adjacent side wall plates 3a and 3b by inserting the tongue piece 11 into the notch 12. Moreover, since no adhesive is used, it is suitable for use in, for example, a microwave heating paper container that is heated in a microwave with frozen food.

Japanese Utility Model Publication No. 50-78633 Utility Model Registration No. 10314

  However, in the paper container A provided with the conventional locking mechanism 10, the adjacent side wall plates 3a and 3b are connected to the engaging end 11a of the tongue piece 11 and the notch 12 portion as shown in FIG. In order to secure the operability of inserting the tongue piece 11 into the notch 12 by coupling by one catch of the receiving end 12a, a slight play is provided at the coupling portion between the adjacent side wall plates 3a, 3b. Yes. For this reason, as shown in FIG. 18 (b), after assembly, the tongue piece 11 is moved away from the notch 12 so that the locking end 11a of the tongue piece 11 is separated from the locking receiving end 12a of the notch 12 during use after assembly. When pushed in (when a force acts in the direction S1 in which the lock is loosened), the locking end 11a of the tongue piece 11 returns again so as to contact the locking receiving end 12a of the notch 12 as shown in FIG. In some cases (a force is applied in the direction S2 of opening the side wall plate 3), the locking end 11a is not caught by the locking receiving end 12a, and the tongue piece 11 may be pulled out of the cut 12. Then, when the tongue piece 11 is pulled out of the cut as described above, the coupling between the adjacent side wall plates 3a and 3b is released, and the paper container A may be disassembled.

  Further, for example, in the case of a paper container A for storing frozen food, the tongue piece 11 may be softened by moisture, and the tongue piece 11 may be easily pulled out from the cut 12.

  In view of the above circumstances, an object of the present invention is to provide a paper container that can prevent a tongue piece from being pulled out from a cut and that can be assembled by firmly and firmly joining adjacent side wall plates.

  In order to achieve the above object, the present invention provides the following means.

  The paper container of the present invention uses a single paperboard having a polygonal bottom plate and a plurality of side wall plates connected to the outer periphery of the bottom plate via side wall plate crease lines. A paper container that is assembled by bending the side wall plates and joining the side wall plates adjacent to each other, and extends laterally outward through a corner crease line to the side end side of one of the adjacent side wall plates. An overlapped portion is formed that is folded at the corner crease line when the paper container is assembled and overlaps the other side wall plate; Adjacent side wall plates by inserting and locking the tongue pieces into the notch when the paper container is assembled. Join A first locking mechanism that is formed on the corner crease line, a notch that is recessed from the upper end of the one side wall plate toward the lower end side, and formed on the upper end side of the other side wall plate, Engaging side projections extending laterally outward from the side edges of the side wall plate, and inserting the engaging projections into the cutouts when engaging the paper container, And a second lock mechanism for restricting relative displacement between adjacent side wall plates when a force is applied in a direction in which the lock by the one lock mechanism is loosened.

  In the present invention, the tongue piece of the first locking mechanism is inserted into the notch, and the locking end facing the overlapping portion side of the tongue piece is hooked on the locking receiving end of the notch portion, and the tongue piece is engaged with the notching portion, as in the prior art. By being stopped, adjacent side wall plates can be joined to each other so as to be controlled by the first locking mechanism to be relatively displaced in the opening direction of the side wall plates, and the paper container is assembled in a tray shape or a box shape. Can do.

  In addition, the side wall plates adjacent to each other are coupled by the first locking mechanism, and the engagement convex portion formed on the other side wall plate is inserted into the notch portion formed on the one side wall plate of the second locking mechanism. Combine. Then, by engaging the engaging convex portion with the notch portion of the second lock mechanism in this way, the hooked state of the locking end of the tongue piece and the locking receiving end of the first locking mechanism is released, that is, The second locking mechanism can regulate the relative displacement of the side wall plate in the direction in which the tongue piece is further pushed into the cut and the locking of the first locking mechanism is loosened. Thereby, it is possible to prevent the tongue piece of the first lock mechanism from being pulled out from the cut during use after assembly.

  Further, in the paper container of the present invention, the paper container includes a projecting piece portion extending laterally outward from a side end of the other side wall plate, and the projecting piece portion is formed on the one side wall plate when the paper container is assembled. It is desirable to have a third lock mechanism that regulates the relative displacement between adjacent side wall plates when a force is applied in a direction in which the lock by the first lock mechanism is loosened by abutting on the corner crease line. .

  In this invention, when the paper container is assembled, the protruding piece comes into contact with the corner crease line of the one side wall plate, so that the tongue piece of the first locking mechanism can be used by the third locking mechanism as well as the second locking mechanism. The hooked state of the lock end and the lock receiving end is released (the tongue piece is further pushed into the notch), and relative displacement of the side wall plate in the direction in which the lock of the first lock mechanism is loosened can be restricted. Thereby, it can prevent that the tongue piece of a 1st locking mechanism pulls out from a notch more reliably after an assembly.

  Furthermore, in the paper container of the present invention, it is more desirable that the engaging convex portion of the second lock mechanism is formed in a hook shape with a hook portion at the tip.

  In this invention, the engaging projection of the second lock mechanism is inserted into the notch and engaged, and the hook provided at the tip of the hook-shaped engaging projection is hooked on one side wall plate. Can be locked. Thereby, in addition to restricting relative displacement of the side wall plate in the direction in which the lock of the first lock mechanism is loosened by the second lock mechanism, the side wall plate is locked by engaging one side wall plate with the hooking portion. Relative displacement in the opening direction can also be restricted by the second lock mechanism. Therefore, it is possible to prevent the tongue piece of the first lock mechanism from being pulled out of the cut more reliably after assembly.

  Further, in the paper container of the present invention, the second lock mechanism inserts and engages the engaging convex portion in the notch portion, and folds the front end side of the engaging convex portion to the one side wall. The side end of the plate may be constrained and the relative displacement between adjacent side wall plates may be restricted.

  In the present invention, the engaging convex portion of the second lock mechanism is inserted into the notch portion to be engaged, and the side end of one side wall plate is engaged with the engaging convex portion by folding the front end side of the engaging convex portion. It can be locked so as to be restrained by. Thereby, in addition to restricting the relative displacement of the side wall plate in the direction in which the lock of the first lock mechanism is loosened by the second lock mechanism, by folding back the engagement convex portion and locking one side wall plate, Relative displacement in the opening direction of the side wall plate can also be restricted by the second lock mechanism. Thereby, it can prevent that the tongue piece of a 1st locking mechanism pulls out from a notch more reliably after an assembly.

  Furthermore, in the paper container of this invention, it is more desirable to form using the said paperboard which has water resistance and / or heat resistance.

  In the present invention, it is possible to provide a paper container that can suitably store stored items such as foods that have a high water content and require heating.

  Moreover, in the paper container of this invention, the heat generating sheet may be affixed on the inner surface.

  In the present invention, for example, in the case of a paper container used for storing food such as frozen pizza (frozen food) and heating it with a frozen food in a microwave oven, the inner surface receives electromagnetic waves irradiated from the microwave oven. By sticking a heat-generating sheet (susceptor) that generates heat to form a paper container, it becomes possible to burn the surface of the food that contacts the heat-generating sheet, or to achieve a crisp finish.

  Further, in the paper container of the present invention, among the three outer peripheries that are continuously arranged in the circumferential direction of the polygonal bottom plate, the second outer perimeter is disposed on both sides in the circumferential direction between the first outer peripheries. The side wall plate is connected to each of the outer periphery and the third outer periphery, and the side wall plate connected to the second outer periphery is extended laterally outward through a corner crease line to form a paper container. Side wall plates arranged along the first outer periphery by being bent at the corner crease line at the time of assembling are continuously provided, and the bottom plate is formed on the first outer peripheral portion. You may form with the forehead part extended outside so that the lower end of the side wall board arrange | positioned along an outer periphery may be supported.

  In the present invention, among the three outer peripheries arranged continuously in the circumferential direction of the polygonal bottom plate, the second outer perimeter and the third outer perimeter arranged on both sides in the circumferential direction between one first outer perimeter When side wall plates are continuously provided around the outer periphery, the frame plate formed on the bottom plate receives the side wall plate disposed along the first outer periphery and supports the lower end thereof, thereby supporting the lower end. The side wall plate disposed along the outer periphery of the first wall can be prevented from falling, and the first locking mechanism can be provided along with the depression of the side wall plate disposed along the first outer periphery after use after assembly. It is possible to prevent the tongue piece from being pulled out of the cut.

  Of the three outer peripheries that are continuously arranged in the circumferential direction of the polygonal bottom plate, one first outer perimeter is provided between the second outer perimeter and the third outer perimeter arranged on both sides in the circumferential direction. When the side wall plates are continuously provided, the number of the first lock mechanism and the second lock mechanism can be reduced, and the molding mechanism can be facilitated.

  In the paper container of the present invention, the first lock mechanism restricts relative displacement in the opening direction of the side wall plate, and the second lock mechanism restricts relative displacement in the loosening direction of the first lock mechanism. Therefore, it is possible to prevent the tongue piece of the first lock mechanism from being pulled out from the notch during use after assembly, and it is possible to assemble the paper container by securely and firmly connecting the adjacent side wall plates.

  Further, even when the tongue piece is softened by moisture, for example, in the case of a paper container for storing frozen food, the tongue piece can be prevented from being pulled out of the cut by providing the second lock mechanism.

It is a top view showing the blank concerning a 1st embodiment of the present invention. It is a perspective view which shows the paper container which concerns on 1st Embodiment of this invention. It is an enlarged view of the 1st locking mechanism of a blank concerning the 1st embodiment of the present invention, the 2nd locking mechanism, and the 3rd locking mechanism. It is the perspective view which shows the paper container which concerns on 1st Embodiment of this invention, and is the figure which looked at the corner part from the inner side. It is the perspective view which shows the paper container which concerns on 1st Embodiment of this invention, and is the figure which looked at the corner part from the outer side. It is an enlarged view of the 1st lock mechanism, the 2nd lock mechanism, and the 3rd lock mechanism, and is a figure showing the modification of the 2nd lock mechanism concerning a 1st embodiment of the present invention. It is the perspective view which shows the paper container of FIG. 6, and is the figure which looked at the corner part from the inner side. It is the perspective view which shows the paper container of FIG. 6, and is the figure which looked at the corner part from the outer side. It is an enlarged view of the 1st lock mechanism, the 2nd lock mechanism, and the 3rd lock mechanism, and is a figure showing the modification of the 2nd lock mechanism concerning a 1st embodiment of the present invention. It is the perspective view which shows the paper container of FIG. 9, and is the figure which looked at the corner part from the outer side. It is a top view which shows the blank which concerns on 2nd Embodiment of this invention. It is the perspective view which shows the paper container which concerns on 2nd Embodiment of this invention, and is the figure which looked at the corner part from the outer side. In 2nd Embodiment of this invention, it is the perspective view used for description of the phenomenon in which the tongue piece of a 1st locking mechanism pulls out from a notch. In 2nd Embodiment of this invention, it is the perspective view used for description of the phenomenon in which the tongue piece of a 1st locking mechanism pulls out from a notch. It is a top view which shows the conventional blank. It is a perspective view which shows the conventional paper container. It is the perspective view which shows the conventional paper container, and is the figure which looked at the corner part from the inner side. In the conventional paper container, it is the perspective view used for description of the phenomenon in which the tongue piece of a 1st locking mechanism pulls out from cutting.

  The paper container according to the first embodiment of the present invention will be described below with reference to FIGS. In addition, this embodiment is related with the paper container which accommodates frozen foods, such as frozen pizza, for example, and is heated with frozen foods, such as an oven and a microwave oven. The present invention need not be limited to a paper container for packaging frozen foods, and can be applied to packaging paper containers for all articles.

  As shown in FIGS. 1 and 2, the paper container B of the present embodiment is a single sheet including an octagonal bottom plate 1 in plan view and eight side wall plates 3 provided continuously around each outer periphery of the bottom plate 1. The blank (paperboard) 4 is assembled by an in-line box making process. Further, this paper container B is provided with side wall plate crease lines 2 along the outer peripheries of the bottom plate 1, and the side wall plates 3 connected to the bottom plate 1 are bent along the side wall plate crease lines 2 to be adjacent to each other. The side wall plates 3a and 3b are assembled in a tray shape (or box shape) by joining the end portions thereof.

  Moreover, in this embodiment, the paper container A is formed using the blank 4 which has water resistance and heat resistance. Further, a heat generating sheet (susceptor) 15 is attached to the inner surface of the paper container A (in this embodiment, the inner surface of the bottom plate 1), which generates heat when receiving electromagnetic waves irradiated from a microwave oven.

  Further, in the present embodiment, the bottom plate 1 includes four long sides (long outer periphery) and four short sides (short outer periphery) respectively arranged between the two long sides, and is substantially rectangular in plan view. It is formed so as to exhibit a shape. Then, four side wall plates 3b (the other side wall plate: hereinafter referred to as a long side wall plate) having a large length corresponding to the length of the long side are provided on the four long side portions of the bottom plate 1 on the side wall plate folding line 2. 4 side wall plates 3a (one side wall plate: hereinafter referred to as a short side wall plate) having a small length corresponding to the length of the short side are provided on the four short side portions of the bottom plate 1 as side walls. They are connected via a plate folding ruled line 2.

  In addition, as shown in FIG. 3 (see FIGS. 1 and 2), the four short side wall plates 3a have short sides and long sides of the bottom plate 1 on both side ends in the lateral direction T2 which is the length direction. A corner crease line 6 extending in the vertical direction (height direction) T3 perpendicular to the length direction T1 is provided from the lower end to the upper end of the short side wall plate 3a. Each short side wall plate 3a extends to the outer side in the lateral direction T1 via the corner crease line 6 on both side ends in the lateral direction T1, and is folded at the corner crease line 6 when the paper container B is assembled. Thus, the overlapping portion 7 is formed so as to overlap the long side wall plate 3b.

  Furthermore, tongue pieces 11 are provided on both side ends of the short side wall plate 3a so as to gradually extend upward from the side end of the overlapping portion 7 toward the outside in the lateral direction T1. Further, the tongue piece 11 is obliquely provided from the substantially central portion in the vertical direction T3 of the overlapping portion 7 toward the upper outside of the lateral direction T1, and the outer peripheral end portion of the upper portion of the tongue piece 11 that is inclined and faces the overlapping portion 7 side is provided. The locking end 11a is used. The tongue piece 11 may be formed to gradually extend downward from the side end of the overlapping portion 7 toward the outside in the lateral direction T1.

  Further, on both side ends of the short side wall plate 3a, there are provided cutout portions 16 formed on the corner crease line 6 and recessed from the upper end to the lower end side of the short side wall plate 3a. In the present embodiment, the cutout portion 16 is formed by cutting the short side wall plate 3a in a V shape from the upper end toward the lower end side and arranging the vertex of the V shape on the corner crease line 6. .

  On the other hand, in each of the four long side wall plates 3b, cuts (cut lines) 12 are formed so as to penetrate from one surface of the long side wall plate 3b to the other side on both side ends in the lateral direction T2. Each incision 12 is spaced from the side edge of the long side wall plate 3b by a predetermined distance and extends in the vertical direction T4 along the side edge of the long side wall plate 3b. A lower horizontal cut portion 12c extending inward in the direction T2, an oblique cut portion 12d that gradually inclines upward from the upper end of the vertical cut portion 12b toward the inner side in the horizontal direction T2, and an upper end of the oblique cut portion 12d inward in the horizontal direction T2. The upper side incision 12e extends and is formed in a substantially U shape. Moreover, in this embodiment, each notch 12 is arrange | positioned in the up-down direction T4 approximate center of the long side wall board 3b. And the latching receiving end 12a is formed of the diagonal notch 12d of the notch 12. FIG.

  Moreover, the engaging convex part 17 extended in the horizontal direction outer side from the side edge of the upper end side of the long side wall board 3b is formed in the both-ends side of the long side wall board 3b, respectively. Further, the upper end of the engaging convex portion 17 of the present embodiment is arranged at the same position in the vertical direction T4 as the upper end on the center side of the long side wall plate 3b, and the upper end on the center side of the long side wall plate 3b is set in the horizontal direction. It is formed in a shape extending to T2. Further, the engaging convex portion 17 is formed such that its lower end gradually inclines upward from the side end of the long side wall plate 3b toward the outside in the lateral direction T2, and further extends outward in the lateral direction T2. Further, in the engagement convex portion 17 of the present embodiment, the substantially trapezoidal portion in plan view on the base end side with the lower end inclined is the contact portion 17a, and the lower end is the outer side in the lateral direction T2 from the tip of the contact portion 17a The portion of the shape in plan view extending in the direction is the engagement main body portion 17b.

  In addition, on both side ends of the long side wall plate 3b, projecting pieces 18 having a shape in plan view extending from the side end on the lower end side of the long side wall plate 3b to the outside in the lateral direction T2 are formed. ing.

  Here, in the paper container A of the present embodiment, the tongue piece 11 extending upward from the side end of the overlapping portion 7 of the short side wall plate 3a toward the outside in the lateral direction T1, and the long side wall plate 3b side. The first locking mechanism 10 is configured by the notch 12 formed on the end side.

  Moreover, it forms on the corner part crease line 6 and is formed on the upper end side of the long side wall plate 3b, and is formed on the upper end side of the long side wall plate 3b. The second locking mechanism 20 is configured by the engaging convex portion 17 extending outward in the lateral direction T2 from the side end.

 Further, the third locking mechanism 21 is configured by the projecting piece portion 18 extending from the side end of the long side wall plate 3b to the outside in the lateral direction T2.

  Next, the operation and effect of the paper container B of the present embodiment having the above configuration will be described.

  As shown in FIGS. 1 and 2, the paper container B of the present embodiment is a single sheet including an octagonal bottom plate 1 in plan view and eight side wall plates 3 provided continuously around each outer periphery of the bottom plate 1. In the in-line box making process, each side wall plate 3 is folded along the side wall plate crease line 2 and the end portions of the adjacent short side wall plate 3a and the long side wall plate 3b are joined together. It is assembled in a tray shape (or box shape).

  At this time, first, as shown in FIGS. 3 to 5, the overlapping portion 7 of the short side wall plate 3 a is folded at the corner crease line 6 and overlapped with the adjacent long side wall plate 3 b, and the short side wall plate 3 a The tongue piece 11 is inserted into the notch 12 from the one surface (in this embodiment, the outer surface) side of the long side wall plate 3b and comes out to the other surface (inner surface) side of the long side wall plate 3b. Then, when the tongue piece 11 is inserted into the notch 12 in this way, the force that the short side wall plate 3a and the long side wall plate 3b bent along the side wall plate crease line 2 try to return to each other (direction S2 for opening the side wall plate 3). The locking end 11a facing the overlapping portion 7 side of the tongue 11 is caught by the locking receiving end 12a of the cut portion. Thereby, the tongue piece 11 inserted into the notch 12 is locked to the notch portion, and the adjacent side wall plates 3 a and 3 b are easily coupled to each other by the first lock mechanism 10 including the tongue piece 11 and the notch 12.

  Moreover, in the paper container B of this embodiment, when the side wall board 3a, 3b adjacent by the 1st lock mechanism 10 is couple | bonded and the paper container B is assembled as mentioned above, the short side of the 2nd lock mechanism 20 is used. Engagement projections 17 formed on the long side wall plate 3b are inserted into and engaged with the notches 16 in the corner portion (on the corner crease line 6) of the side wall plate 3a. At this time, the engagement main body portion 17b of the engagement convex portion 17 is inserted into the cutout portion 16 to be engaged. When the engagement main body portion 17 b is engaged in this way, the contact portion 17 a of the engagement convex portion 17 contacts the V-shaped apex of the notch portion 16.

  Here, in the conventional paper container A, as shown in FIG. 18, after assembly, during use, a force is applied in the direction S <b> 1 in which the lock of the first lock mechanism 10 is loosened, so that the tongue 11 is cut from the notch 12. When pushed into the back, the locking end 11a of the tongue piece 11 again comes into contact with the locking receiving end 12a of the notch 12 by the force acting in the opening direction S2 on the short side wall plate 3a and the long side wall plate 3b. When returning in this manner, the locking end 11 a is not caught by the locking receiving end 12 a, and the tongue piece 11 may be pulled out of the notch 12.

  On the other hand, in the paper container B of the present embodiment, the engagement main body portion 17b of the engagement convex portion 17 of the second lock mechanism 20 is engaged with the notch portion 16, as shown in FIGS. Because the contact portion 17a of the engagement convex portion 17 is in contact with the V-shaped apex of the notch portion 16, even if a force acts in the direction S1 in which the first lock mechanism 10 is loosened, The locking end 11 a of the tongue piece 11 is prevented from being separated from the locking receiving end 12 a of the notch 12 and the tongue piece 11 is prevented from being pushed into the back from the notch 12. That is, relative displacement of the side wall plates 3a, 3b in the direction S1 in which the lock of the first lock mechanism 10 is loosened is restricted by the second lock mechanism 20. For this reason, even if the force of the opening direction S2 acts on the short side wall plate 3a or the long side wall plate 3b after the force acts in the direction S1 in which the first locking mechanism 10 is loosened, the locking end 11a of the tongue piece 11 is applied. Is held in a state of being caught by the latch receiving end 12a of the cut portion, and the tongue piece 11 is prevented from being pulled out of the cut 12.

  Further, in the paper container B of the present embodiment, as shown in FIGS. 3 and 4, when the side wall plates 3 a and 3 b adjacent to each other are assembled by the first lock mechanism 10 and the paper container B is assembled, the third The tip of the projecting piece 18 extending outward in the lateral direction T2 from the side end of the long side wall plate 3b of the lock mechanism 21 abuts on the corner crease line 6 of the short side wall plate 3a. Thereby, even if a force acts in the direction S1 in which the first locking mechanism 10 is loosened, the locking end 11a of the tongue piece 11 is separated from the locking receiving end 12a of the notch 12, and the tongue piece 11 is pushed into the back from the notch 12. Is prevented. That is, relative displacement of the side wall plates 3a and 3b in the direction S1 in which the lock of the first lock mechanism 10 is loosened is also restricted by the third lock mechanism 21.

  And in this embodiment, the 2nd lock mechanism 20 is provided in the upper end side of the side wall board 3b, and controls the relative displacement of adjacent side wall board 3a, 3b, and the 3rd lock mechanism 21 is the lower end side of the side wall board 3b. In order to restrict relative displacement between the side wall plates 3a and 3b adjacent to each other, a force is applied in the direction S1 in which the first lock mechanism 10 is loosened, and then the direction is opened to the short side wall plate 3a and the long side wall plate 3b. Even when the force of S2 is applied, the tongue end 11a of the tongue piece 11 is more securely held in a state of being caught by the latch receiving end 12a of the cut portion, and the tongue piece 11 may be pulled out of the notch 12. Is prevented.

  On the other hand, when the paper container is used by storing food (frozen food) such as frozen pizza in a paper container and heating it with the frozen food in an oven or a microwave oven as in this embodiment, the water resistance It is possible to suitably hold the shape of the paper container B by forming the paper container B using the blank 4 having heat resistance or heat resistance, but the tongue piece 11 of the first lock mechanism 10 is softened by moisture. As a result, the tongue piece 11 may be pulled out of the notch 12.

  On the other hand, even if it is the paper container B which stores frozen food etc. by providing the 2nd lock mechanism 20 and the 3rd lock mechanism 21 like the paper container B of this embodiment, the 1st lock mechanism 10 is provided. The side wall plate is prevented from being relatively displaced in the direction S1 in which the lock is loosened, and the tongue piece 11 is reliably prevented from being pulled out of the cut 12.

  Therefore, in the paper container B of the present embodiment, the tongue piece 11 of the first lock mechanism 10 is inserted into the notch 12 and the locking end 11a facing the overlapping portion 7 side of the tongue piece 11 is engaged with the notch portion as in the conventional case. Adjacent sidewall plates so that the first locking mechanism 10 regulates relative displacement in the opening direction S2 when the tongue piece 11 is hooked on the receiving end 12a and the tongue piece 11 is locked to the cut portion. 3a and 3b can be joined together, and a tray-like or box-like paper container B can be assembled.

  Further, the side wall plates 3 a and 3 b adjacent to each other are coupled by the first lock mechanism 10, and the notch 16 formed in the short side wall plate 3 a of the second lock mechanism 20 is formed in the long side wall plate 3 b. The mating projection 17 is inserted and engaged. Then, by engaging the engagement convex portion 17 with the notch portion 16 of the second lock mechanism 20 in this way, the engagement end 11a of the tongue piece 11 and the engagement receiving end 12a of the first lock mechanism 10 are hooked. The state is released, that is, the second locking mechanism 20 regulates that the side wall plates 3a and 3b are relatively displaced in the direction S1 in which the tongue 11 is further pushed into the notch 12 and the lock of the first locking mechanism 10 is loosened. Can do. Thereby, it is possible to prevent the tongue piece 11 of the first lock mechanism 10 from being pulled out of the cut 12 during use after assembly.

  Therefore, according to the paper container B of the present embodiment, the first lock mechanism 10 restricts relative displacement in the opening direction S2 of the side wall plates 3a, 3b, and the second lock mechanism 20 locks the first lock mechanism 10. Since the relative displacement in the slackening direction S1 is restricted, it is possible to prevent the tongue piece 11 of the first lock mechanism 10 from being pulled out of the notch 12 during use after assembly, and to bond the overlapping portion 7 with an adhesive. In other words, it is possible to assemble the paper container B by securely and firmly connecting the adjacent side wall plates 3a and 3b.

  Moreover, even if the tongue piece 11 is softened by moisture, for example, in the case of a paper container B that stores frozen food, the tongue piece 11 can be prevented from being pulled out of the cut 12 by providing the second lock mechanism 20. .

  Further, in the paper container B of the present embodiment, when the paper container B is assembled, the projecting piece portion 18 abuts on the corner crease line 6 of the short side wall plate 3a, so that the third locking mechanism 20 and the third locking mechanism 20 are connected together. The locking mechanism 21 also releases the hooked state of the locking end 11a of the tongue piece 11 and the locking receiving end 12a of the first locking mechanism 10 (the tongue piece 11 is further pushed into the notch 12), and the first locking mechanism 10 The relative displacement of the side wall plates 3a and 3b in the direction S1 in which the lock is loosened can be restricted. Thereby, it is possible to prevent the tongue piece 11 of the first lock mechanism 10 from being pulled out of the cut 12 after the assembly.

  Furthermore, by using the paperboard 4 having water resistance and / or heat resistance, it is possible to provide a paper container B that can suitably store stored items such as food that have a lot of moisture and need to be heated.

  Moreover, in the paper container B of this embodiment, when it is the paper container B which accommodates foods (frozen food), such as frozen pizza, and is heated and used with frozen food in a microwave oven, for example, the inner surface of the baseplate 1 For example, the paper container B is configured by sticking a heat generating sheet 15 that generates heat by receiving electromagnetic waves irradiated from a microwave oven. By comprising in this way, it becomes possible to scorch the surface which contacts the heat_generation | fever sheet | seat 15 of a foodstuff, or to make it the crispy finish.

  The first embodiment of the paper container according to the present invention has been described above, but the present invention is not limited to the first embodiment described above, and can be changed as appropriate without departing from the spirit of the present invention.

  For example, in this embodiment, the paper container B is assembled and formed using a single blank 4 provided with an octagonal bottom plate 1 and eight side wall plates 3 connected to the outer periphery of the bottom plate 1. However, the paper container according to the present invention is not necessarily limited to the octagonal shape, and may be formed with the polygonal bottom plate 1. Although the description has been made assuming that the paper container is formed in a tray shape, of course, even if the present invention is applied to a box-shaped paper container or the like, it is possible to obtain the same effects as the present embodiment. is there.

  Further, in the present embodiment, the paper container B is configured to include the three lock mechanisms of the first lock mechanism 10, the second lock mechanism 20, and the third lock mechanism 21, but the paper according to the present invention. The container only needs to include at least the first lock mechanism 10 and the second lock mechanism 20.

  In the present embodiment, one side wall plate according to the present invention has been described as the short side wall plate 3a, and the other side wall plate as the long side wall plate 3b. It is not necessary to limit the size of the length.

  Furthermore, in this embodiment, the overlapping portion 7, the tongue 11, and the notch 16 are provided on both side ends in the length direction T1 of the short side wall plate 3a, and on both side ends in the length direction T2 of the long side wall plate 3b. The notch 12, the engaging convex portion 17, and the protruding piece portion 18 are provided. However, the overlapping portion 7, the tongue piece 11, and the notch portion 16 are provided on one side end side of one side wall plate, and this one side wall is provided. A first locking mechanism 10, a second locking mechanism 20, a third locking mechanism that locks adjacent side wall plates 3 a, 3 b by providing a notch 12, an engaging convex portion 17, and a projecting piece portion 18 on the other side end side of the plate. Each of the lock mechanisms 21 may be configured.

  Furthermore, in this embodiment, the engaging convex part 17 of the 2nd lock mechanism 20 inclines toward upper direction gradually as the lower end goes to the horizontal direction T2 outer side from the side end of the long side wall board 3b, and also the horizontal direction T2 The contact portion 17a is formed to extend outward and has a substantially trapezoidal shape in plan view on the base end side, and an engagement main body portion 17b in plan view shape on the tip end side.

  On the other hand, as shown in FIGS. 6 to 8, the engagement convex portion 17 of the second lock mechanism 20 may be formed in a hook shape with a hook portion 17 c at the tip. In this case, the engaging protrusion 17 of the second lock mechanism 20 is inserted into the notch 16 to be engaged, and the hook 17c provided at the tip of the hook-shaped engaging protrusion 17 is provided. Can be hooked on the short side wall plate 3a and locked. Thus, in addition to restricting relative displacement of the side wall plates 3a and 3b in the direction S1 in which the lock of the first lock mechanism 10 is loosened by the second lock mechanism 20, the short side wall plate 3a is engaged by the hooking portion 17c. By stopping, the second lock mechanism 20 can also regulate relative displacement of the side wall plates 3a, 3b in the opening direction S2. Therefore, it is possible to prevent the tongue piece 11 of the first lock mechanism 10 from being pulled out of the cut 12 after the assembly.

  Further, as shown in FIGS. 9 and 10, the engagement protrusion 17 of the second lock mechanism 20 is formed longer than the present embodiment, and the engagement protrusion 17 is inserted into the notch 16 to be engaged. At the same time, the distal end side (engagement main body portion 17b) of the engagement convex portion 17 is folded back to restrain the side edge of the short side wall plate (one side wall plate) 3a, and the relative displacement between the adjacent side wall plates 3a and 3b is restricted. You may comprise.

  In this case, the engagement convex portion 17 of the second lock mechanism 20 is inserted into the notch portion 16 to be engaged, and the distal end side of the engagement convex portion 17 is folded back, thereby the short side wall plate 3a. The side ends can be locked so as to be restrained by the engaging projections 17. Thereby, in addition to restricting relative displacement of the side wall plates 3a and 3b in the direction S1 in which the lock of the first lock mechanism 10 is loosened by the second lock mechanism 20, the engagement convex portion 17 is folded back to short the side wall plate. By locking 3a, the second lock mechanism 20 can also regulate relative displacement of the side wall plates 3a, 3b in the opening direction S2. Thereby, it can prevent that the tongue piece 11 of the 1st locking mechanism 10 pulls out from the notch 12 more reliably after an assembly.

  Next, a paper container according to a second embodiment of the present invention will be described with reference to FIGS. Here, in this embodiment, the same code | symbol is attached | subjected with respect to the structure similar to 1st Embodiment, and the detailed description is abbreviate | omitted.

  As shown in FIGS. 11 and 12, the paper container C of the present embodiment includes an octagonal bottom plate 1 in plan view and eight side wall plates connected to the outer periphery of the bottom plate 1 as shown in FIGS. 3 is assembled by an in-line box-making process. The paper container C is assembled by coupling (locking) adjacent side wall plates 3 a and 3 b with the first lock mechanism 10 and the second lock mechanism 20.

  On the other hand, in the paper container C of the present embodiment, one short side (first outer periphery) is interposed between the three outer periphery continuously arranged in the circumferential direction of the octagonal (polygonal) bottom plate 1. Long side wall plates 3b and 3c are connected to two long sides (second outer periphery and third outer periphery) arranged on both sides in the circumferential direction via side wall plate folding lines 3, respectively. Further, one long side wall plate 3c connected to one long side extends outward in the lateral direction T2 via the corner crease line 6, and is folded at the corner crease line 6 when the paper container C is assembled. A short side wall plate 3a disposed along the short side (not continuous to the short side) is provided continuously.

  Moreover, in this embodiment, the baseplate 1 is provided with the forehead part 22 extended on the short side part so that it may support the lower end of the short side wall board 3a arrange | positioned along this short side. Is formed.

  In addition, the overlapping portion 7 is provided only at one side end of the short side wall plate 3a via the corner crease line 6, and the tongue piece 11 of the first lock mechanism 10 and the notch portion of the second lock mechanism 20 are provided. 16 is provided. Moreover, the notch 12 of the 1st lock mechanism 10 and the engagement convex part 17 of the 2nd lock mechanism 20 are provided in the both-sides end side of the other long side wall board 3b, respectively.

  In the paper container C of the present embodiment configured as described above, the overlapping portion 7 of the short side wall plate 3a is folded at the corner crease line 6 while being overlapped with the other adjacent long side wall plate 3b. The tongue piece 11 of the side wall plate 3a is inserted into the notch 12 from one surface side of the other long side wall plate 3b and is brought out to the other surface side of the other long side wall plate 3b. When the tongue piece 11 is inserted into the notch 12 in this way, the force to return to the long side wall plate 3c and the other long side wall plate 3b folded at the side wall plate crease line 2 (force in the opening direction S2). ) And the engaging end 11a facing the overlapping portion 7 side of the tongue 11 of the short side wall plate 3a is caught by the engaging receiving end 12a of the cut portion of the other long side wall plate 3b. Thereby, the tongue piece 11 inserted into the notch 12 is locked to the notch portion, and the adjacent side wall plates 3 a and 3 b are easily coupled to each other by the first lock mechanism 10 including the tongue piece 11 and the notch 12.

  Further, when the side wall plates 3a and 3b adjacent to each other are coupled by the first lock mechanism 10 to assemble the paper container C, the corner portion (on the corner crease line 6) of the short side wall plate 3a of the second lock mechanism 20 is assembled. The engaging projection 17 formed on the other long side wall plate 3b is inserted into the notch 16 and engaged therewith.

  Since the engaging convex part 17 of the second lock mechanism 20 is engaged with the notch part 16 and the engaging convex part 17 is in contact with the V-shaped apex of the notch part 16, the first Even when a force is applied in the direction S1 in which the locking mechanism 10 is loosened, the locking end 11a of the tongue piece 11 is prevented from being separated from the locking receiving end 12a of the notch 12, and the tongue piece 11 is prevented from being pushed into the back from the notch 12. The That is, as in the first embodiment, the second lock mechanism 20 regulates the relative displacement of the side wall plates 3a and 3b in the direction S1 in which the lock of the first lock mechanism 10 is loosened. For this reason, even if the force of the opening direction S2 acts on the short side wall plate 3a or the long side wall plate 3b after the force acts in the direction S1 in which the first locking mechanism 10 is loosened, the locking end 11a of the tongue piece 11 is applied. Is held in a state of being caught by the latch receiving end 12a of the cut portion. Therefore, the tongue piece 11 is prevented from being pulled out from the cut 12.

  On the other hand, in this embodiment, when the adjacent side wall plates 3a and 3b of the short side wall plate 3a and the other long side side wall plate 3b are joined together by the first lock mechanism 10 and the second lock mechanism 20 as described above, The short side wall plate 3 a that is connected to the long side wall plate 3 c and is not connected to the bottom plate 1 is automatically disposed along the short side of the bottom plate 1.

  At this time, when the short side wall plate 3a is not connected to the bottom plate 1 as described above, the force in the direction S1 that opens to the short side wall plate 3a not connected to the bottom plate 1 as shown in FIG. As a result, the short side wall plate 3a is displaced so as to fall below the bottom plate 1, and the tongue piece 11 of the first lock function 10 may be pulled out from the notch 12 as shown in FIG.

  On the other hand, in the paper container C of the present embodiment, as shown in FIGS. 11 and 12, by receiving the short side wall plate 3a and supporting its lower end by the forehead portion 22 formed on the bottom plate 1, The short side wall plate 3a disposed along the short side can be prevented from dropping, and the tongue piece 11 of the first lock mechanism 10 is cut along with the short side wall plate 3a during use after assembly. It is possible to prevent withdrawal from 12.

  Moreover, when it comprises without connecting the short side wall board 3a to the baseplate 1, the number of the 1st lock mechanisms 10 and the 2nd lock mechanisms 20 can be reduced, and a shaping | molding mechanism can be made easy. become.

  As mentioned above, although 2nd Embodiment of the paper container which concerns on this invention was described, this invention is not limited to said 1st Embodiment, The meaning is included including the description example of 1st Embodiment, and a modification. As long as it does not deviate from the above, it can be appropriately changed.

1 bottom plate 2 side wall plate crease line 3 side wall plate 3a short side wall plate (one side wall plate)
3b Long side wall plate (the other side wall plate)
3c Long side wall plate (side wall plate)
4 Blank 6 Corner part crease line 7 Overlapping part 10 First lock mechanism 11 Tongue piece 11a Locking end 12 Notch 12a Locking receiving end 12b Vertical notch 12c Lower side notch 12d Oblique notch 12e Upper side notch 15 Heat generation Seat (susceptor)
16 notch portion 17 engaging convex portion 17a abutting portion 17b engaging main body portion 17c hooking portion 18 projecting piece portion 20 second lock mechanism 21 third lock mechanism 22 forehead portion A conventional paper container B paper container C paper container S1 Loosening direction S2 Side wall plate opening direction T1 Horizontal direction T2 Horizontal direction T3 Vertical direction T4 Vertical direction

Claims (7)

Using a single paperboard comprising a polygonal bottom plate and a plurality of side wall plates connected to the outer periphery of the bottom plate via a side wall plate crease line, and bending the side wall plate at the side wall plate crease line, A paper container assembled by combining adjacent side wall plates,
On the side end side of one side wall plate adjacent to each other, an overlapping portion is formed that extends laterally outward via a corner crease line and is folded at the corner crease line when the paper container is assembled and overlaps the other side wall plate. And
A paper container comprising a tongue piece extending upward or downward from the side end of the overlap portion of the one side wall plate toward the outside in the lateral direction and a notch formed on the side end side of the other side wall plate. A first locking mechanism for connecting adjacent side wall plates by inserting and locking the tongue piece into the notch when assembling,
Formed on the corner crease line, a notch that is recessed from the upper end of the one side wall plate toward the lower end side, and formed on the upper end side of the other side wall plate, from the side end of the other side wall plate The engaging projection is extended outward in the lateral direction, and the locking by the first locking mechanism is loosened by inserting and engaging the engaging projection into the notch during assembly of the paper container. A paper container comprising: a second lock mechanism that restricts relative displacement between adjacent side wall plates when a force is applied in a direction. The paper container according to claim 1,
It consists of a projecting piece extending laterally outward from the side edge of the other side wall plate, and the projecting piece abuts on the corner crease line of the one side wall plate when assembling the paper container. A paper container comprising a third lock mechanism for restricting relative displacement between adjacent side wall plates when a force acts in a direction in which the lock by the first lock mechanism is loosened. In the paper container according to claim 1 or 2,
The paper container, wherein the engagement convex portion of the second lock mechanism is formed in a hook shape with a hook portion at a tip. In the paper container according to claim 1 or 2,
The second lock mechanism inserts and engages the engaging convex portion in the notch portion and folds the distal end side of the engaging convex portion to constrain the side end of the one side wall plate to be adjacent to each other. A paper container configured to restrict relative displacement between side wall plates. In the paper container according to any one of claims 1 to 4,
A paper container formed using the paperboard having water resistance and / or heat resistance. In the paper container according to any one of claims 1 to 5,
A paper container having an exothermic sheet adhered to the inner surface. In the paper container according to any one of claims 1 to 6,
Of the three outer peripheries arranged continuously in the circumferential direction of the polygonal bottom plate, one first outer perimeter is provided between the second outer perimeter and the third outer perimeter arranged on both sides in the circumferential direction, respectively. The side wall plate is continuously provided,
Extending laterally outward through a corner crease line to the side wall plate provided continuously around the second outer periphery, and folded at the corner crease line when assembling a paper container to the first outer periphery. Side wall plates arranged along the line are connected,
The bottom plate is formed with a frame portion extending outward to support a lower end of a side wall plate disposed along the first outer periphery in the first outer peripheral portion. Characteristic paper container.

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