JP2013189239A - Container folding structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new container capable of enhancing efficiency when disposed and recovered by enabling folding of a container formed of a foam synthetic resin material to save a space, a structure for folding the container, and food.SOLUTION: Upper side folding grooves 21 and lower side folding grooves 22 each having a V-shaped vertical section are continuously formed on a side wall 15 of a container 10 via conjunction tops 23, 24 between lower inclined surfaces of the upper folding grooves and upper inclined surfaces of the lower folding grooves. At positions corresponding to positions of the conjunction tops of a wall face on a side opposite to a wall face in which the upper folding grooves and the lower folding grooves are formed, folding portions 20 in which start grooves 27, 28 each having a V-shaped vertical section and having a groove shallower than the upper folding groove and the lower folding portion circling around the wall face are formed are installed. The folding portions are constituted of two sets which are a first folding portion 30 and a second folding portion 50 from the upper side of the container. A deformation vertical groove 70 formed to have a V-shaped cross section is formed between the first folding portion and the second folding portion.

Description

  The present invention relates to a container folding structure, and more particularly to a container capable of reducing the volume of a container by pressing the container up and down and a folding structure incorporated therein.

  As a technique for reducing the volume of the container, a contractible deformable bellows structure having a W-shaped cross section that is continuous in the vertical direction of the body portion of the container is generally known (see the container 90 in the schematic cross-sectional view of FIG. 15). For example, in order to suppress oxidative denaturation of a solution for photographic processing, a container that can reduce the volume of the container with use has been proposed (see Patent Document 1). Or the container made from a polyethylene terephthalate for liquids, such as a drink which improved the efficiency at the time of container conveyance, disposal, and collection | recovery by reducing a container volume is proposed (refer patent document 2 etc.). Usually, the container 90 disclosed in Patent Documents and shown in FIG. 15 is formed into a bottle shape by blow molding. In the case of blow molding, it is relatively easy to incorporate the illustrated bellows structure 91 into a container shape by the structure and manufacturing method of the mold for molding. Accordingly, many bellows structures have been proposed exclusively in the field of liquid packaging containers.

  In the case of cooking utensils such as a pan made of silicone resin or a drainer, the bellows structure may be adopted for the body part because of improved storage efficiency by folding when not in use. In the case of the product 100 using the silicone resin, as can be understood from the schematic cross-sectional view of FIG. 16, the thick portions 101 and the thin portions 102 are alternately provided. By adopting this structure, the bellows structure utilizing the resin elasticity can be flexibly deformed and can be easily folded.

  Here, in the packaging of foods provided in the cold state such as ice cream, especially noodles, bowls, foods provided in a warm state such as soups, stews, or cold confectionery such as ice cream, sherbet, Containers formed from a foamed synthetic resin material such as styrene foam having excellent heat insulation, cold insulation, and heat insulation effects are widely used. However, since each patent document and the container of FIG. 10 are made of resin such as polyethylene terephthalate, they are not suitable for pouring hot foods that are not directly warm. In the case of a silicone resin, the material is expensive and is not suitable for disposable (one-way, disposable) applications.

  Further, when these warm or cold food packaging containers are formed from a foamed synthetic resin material, it is difficult to adopt the bellows structure as shown in the patent literature or the illustration as it is in consideration of ease of holding and ease of eating. If the bellows structure is simply adopted, it is not easy to maintain the original shape of the container, and the shape becomes unstable. That is, in the foamed synthetic resin container, a container incorporating a foldable structure has not been practically used so far.

  Under such circumstances, the volume reduction by folding the foamed synthetic resin material container is still in the exploration stage. At present, disposal of containers, efficiency improvement during collection, and volume reduction are urgent issues that should be addressed from the viewpoint of environmental issues. Thus, a new structure that enables folding of the foamed synthetic resin material container has been demanded.

Japanese Patent Laid-Open No. 7-5664 JP 2001-199443 A

  The present invention has been made in view of the above points, and enables a container of a foamed synthetic resin material to be folded, and a new container that can increase the efficiency at the time of disposal and recovery by saving space and its A structure for folding is provided.

  That is, the invention of claim 1 is mainly composed of a foamed synthetic resin material, and has an opening, a bottom surface having a smaller area than the opening, and an inclined surface as a whole from the opening toward the bottom. In the container having a side wall portion that can be folded in the direction, on either one of the inner wall surface portion or the outer wall surface portion of the side wall portion, there are an upper fold groove portion and a lower fold groove portion having a V-shaped longitudinal section that circulates around the wall surface portion. It is formed continuously through the joint top of the lower inclined surface of the upper folded groove portion and the upper inclined surface of the lower folded groove portion, and is opposite to the wall surface portion on which the upper folded groove portion and the lower folded groove portion are formed. Folding in which a vertical groove V-shaped starting groove portion having a groove portion shallower than the upper folded groove portion and the lower folded groove portion that circulates around the wall surface portion is formed at a position corresponding to the joint top position of the wall surface portion With a part The folding part is provided in two sets as a first folding part and a second folding part from above in the vertical direction of the container, and an upper folding groove part and a lower folding groove part in the first folding part are formed in the inner wall surface part, An upper fold groove portion and a lower fold groove portion in the second fold portion are formed in the outer wall surface portion, and a transverse cross section V is formed between the activation groove portion in the first fold portion and the upper fold groove portion of the second fold portion. The present invention relates to a container folding structure comprising a deformed vertical groove formed in a letter shape.

  According to a second aspect of the present invention, the upper folding groove portion and the lower folding groove portion of the first folding portion are formed in the inner wall surface portion, and the upper folding groove portion and the lower folding groove portion of the second folding portion are 2. The container folding structure according to claim 1, wherein the deformed vertical groove portion when formed on the outer wall surface portion has a groove depth increased from the first folding portion side to the second folding portion.

  The invention of claim 3 is mainly composed of a foamed synthetic resin material, and is formed with an opening, a bottom surface having a smaller area than the opening, and an overall inclined shape from the opening toward the bottom surface. In the container having a foldable side wall portion, an upper side fold groove portion and a lower fold groove portion having a V-shaped longitudinal section that circulates around the wall surface portion are provided on either the inner wall surface portion or the outer wall surface portion of the side wall portion. A wall surface on the opposite side to the wall surface portion on which the upper and lower fold groove portions are formed, continuously formed through the joint top portion of the lower inclined surface of the fold groove portion and the upper inclined surface of the lower fold groove portion. A folding portion in which a starting groove portion having a V-shaped longitudinal section having a groove portion shallower than the upper folded groove portion and the lower folded groove portion that circulates around the wall surface portion is formed at a position corresponding to the joint top portion position of the portion. As well as Two sets of folding parts are provided in the vertical direction of the container as a first folding part and a second folding part from above, and an upper folding groove part and a lower folding groove part in the first folding part are formed on the outer wall surface part. An upper fold groove portion and a lower fold groove portion in the two fold portions are formed in the inner wall surface portion, and a cross section V-shaped between the lower fold groove portion of the first fold portion and the activation groove portion in the second fold portion. The present invention relates to a container folding structure including a deformed longitudinal groove formed in a shape.

  According to a fourth aspect of the present invention, the upper folding groove portion and the lower folding groove portion of the first folding portion are formed in the outer wall surface portion, and the upper folding groove portion and the lower folding groove portion of the second folding portion are 4. The container folding structure according to claim 3, wherein the deformed vertical groove portion when formed on the inner wall surface portion has a groove depth that is increased from the second folding portion side to the first folding portion.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, a groove depth of the upper fold groove portion and the lower fold groove portion is formed deeper than half of a thickness of the general portion of the side wall portion. It concerns on the folding structure of the container as described in the item.

  A sixth aspect of the present invention relates to the container folding structure according to any one of the first to fifth aspects, wherein a plurality of the deformed vertical groove portions are formed at equal intervals on the wall surface portion.

  The invention according to claim 7 is a wall surface portion opposite to the wall surface portion where the deformed flutes are formed, and an auxiliary flutes formed in a V-shaped cross section is provided at an intermediate position between the deformed flutes. It concerns on the folding structure of the container of any one of Claim 1 thru | or 6.

  The invention according to claim 8 relates to the container folding structure according to any one of claims 1 to 7, wherein the container has a circular cross-sectional shape.

  The invention according to claim 9 is the container folding structure according to any one of claims 1 to 8, wherein a resin film is adhered to either or both of the entire inner wall surface portion and the entire outer wall surface portion of the container. Concerning.

  According to the container folding structure of the first aspect of the present invention, the synthetic resin material is mainly used, and the opening, the bottom surface having a smaller area than the opening, and the overall inclination from the opening toward the bottom surface. In a container having a side wall portion that is formed in a shape and can be folded in the vertical direction, an upper folding groove portion having a V-shaped vertical section that circulates around the wall surface portion and a lower surface are provided on either the inner wall surface portion or the outer wall surface portion of the side wall portion. A side fold groove portion is continuously formed through a joint top portion of a lower inclined surface of the upper fold groove portion and an upper inclined surface of the lower fold groove portion, thereby forming the upper fold groove portion and the lower fold groove portion. A vertical groove V-shaped starting groove portion having a groove portion shallower than the upper bent groove portion and the lower bent groove portion around the wall surface portion at a position corresponding to the joint top portion position of the wall surface portion opposite to the wall surface portion. Formed fold The folding part is provided in two sets as a first folding part and a second folding part from above in the vertical direction of the container, and the upper folding groove part and the lower folding groove part in the first folding part are provided on the inner wall part. And forming an upper fold groove portion and a lower fold groove portion in the second fold portion on the outer wall surface portion, the starting groove portion in the first fold portion, and the upper fold groove portion of the second fold portion. Since the deformed vertical groove portion formed in a V-shaped cross section is provided therebetween, it is possible to obtain a larger amount of folding in the container formed from the foamed synthetic resin material and to perform simpler folding. Thus, by saving space, a new container that can increase the efficiency during disposal and recovery can be obtained.

  According to the folding structure of the container according to the invention of claim 2, in the invention of claim 1, the upper folding groove part and the lower folding groove part of the first folding part are formed in the inner wall surface part, and the second folding part is formed. Since the deformed vertical groove portion when the upper folded groove portion and the lower folded groove portion of the portion are formed in the outer wall surface portion, the groove depth increases from the first folded portion side to the second folded portion, The shrinkage deformation of the circumferential diameter of the outer wall surface portion can be made flexible and smooth.

  According to the container folding structure of the third aspect of the present invention, the synthetic resin material is mainly used, and the opening, the bottom surface having a smaller area than the opening, and the overall inclination from the opening toward the bottom surface. In a container having a side wall portion that is formed in a shape and can be folded in the vertical direction, an upper folding groove portion having a V-shaped vertical section that circulates around the wall surface portion and a lower surface are provided on either the inner wall surface portion or the outer wall surface portion of the side wall portion. A side fold groove portion is continuously formed through a joint top portion of a lower inclined surface of the upper fold groove portion and an upper inclined surface of the lower fold groove portion, thereby forming the upper fold groove portion and the lower fold groove portion. A vertical groove V-shaped starting groove portion having a groove portion shallower than the upper bent groove portion and the lower bent groove portion around the wall surface portion at a position corresponding to the joint top portion position of the wall surface portion opposite to the wall surface portion. Formed fold The folding part is provided in two sets as a first folding part and a second folding part from above in the vertical direction of the container, and the upper folding groove part and the lower folding groove part in the first folding part are provided on the outer wall surface part. And forming an upper fold groove portion and a lower fold groove portion in the second fold portion on the inner wall surface portion, the lower fold groove portion of the first fold portion, and the activation groove portion in the second fold portion. Since the deformed vertical groove portion having a V-shaped cross section is provided between the two, a larger fold amount can be obtained and a simple fold can be achieved in a container formed from a foamed synthetic resin material. Thus, by saving space, a new container that can increase the efficiency during disposal and recovery can be obtained.

  According to the container folding structure of the invention of claim 4, in the invention of claim 3, the upper folding groove part and the lower folding groove part of the first folding part are formed in the outer wall surface part, and the second folding part is formed. Since the deformed vertical groove portion when the upper fold groove portion and the lower fold groove portion of the portion are formed on the inner wall surface portion, the groove depth increases from the second fold portion side to the first fold portion, The shrinkage deformation of the circumferential diameter of the outer wall surface portion can be made flexible and smooth.

  According to the folding structure of the container according to the invention of claim 5, in the invention of any one of claims 1 to 4, the groove depth of the upper folding groove and the lower folding groove is the thickness of the general part of the side wall. Since it is formed deeper than half the length, it can be reliably bent at the fold groove portion by the deformation pressure applied to the container.

  According to the folding structure of the container according to the invention of claim 6, in the invention of any one of claims 1 to 5, a plurality of the deformed vertical groove portions are formed at equal intervals on the wall surface portion, so that it is easy and good-looking. Folding is possible.

  According to the folding structure of the container according to the invention of claim 7, in the invention of any one of claims 1 to 6, it is a wall surface portion opposite to the wall surface portion where the deformed flutes are formed, and the deformed flutes are Since an auxiliary vertical groove portion having a V-shaped cross section is provided at an intermediate position, the deformation caused by the folding of the side wall portion on the side where the deformed vertical groove portion is formed is assisted from the opposite side, Facilitates folding deformation.

  According to the folding structure of the container according to the invention of claim 8, in the invention of any one of claims 1 to 7, since the cross-sectional shape of the container is circular, the force applied to the folding part is equalized, and the folding part The variation in the amount of folding deformation that occurs in the case can be suppressed as much as possible.

  According to the folding structure of the container according to the invention of claim 9, in the invention of any one of claims 1 to 8, a resin film is adhered to either or both of the entire inner wall surface part and the entire outer wall surface part of the container. Therefore, the groove part of the folding part of the container of a foamed synthetic resin material can be reinforced at the time of folding deformation.

1 is an overall side view of a container according to a first embodiment of the present invention. FIG. 2 is a partial end view of the container of FIG. 1. It is a principal part expanded end elevation of a side wall part. It is a partial bottom view of the container of FIG. It is a partial top view of the container of FIG. It is the whole container perspective view after folding. It is a partial end elevation of the container after folding. It is a 1st expanded sectional view of a folding part. It is a 2nd expanded sectional view of a folding part. It is a 3rd expanded sectional view of a folding part. It is a partial bottom view of the container after folding. It is a fragmentary top view of the container of FIG. It is a partial end elevation of a container concerning the 2nd example of the present invention. It is a schematic diagram which shows the layer structure of a container. It is a cross-sectional schematic diagram of the container of the 1st prior art example. It is a cross-sectional schematic diagram of the article of the second conventional example.

  Based on the overall side view of FIG. 1, the partial end view of FIG. 2, etc., the container 10 of the first embodiment defined in the invention including claim 1, the folding part 20 provided in the container, and the folding structure Sf Will be described. The container 10 is formed by foam molding mainly using a foamed synthetic resin material typified by polystyrene foam, foamed polyethylene, foamed polypropylene and the like. In the container of this embodiment, the formation is made of polystyrene paper (PSP). Therefore, since many bubbles are formed, heat insulation is excellent. When the container is gripped, heat from the food or heat from the hand becomes difficult to conduct through the container, and as described in the background art, it is suitable as a packaging container for hot or cold food.

  As can be understood from FIG. 1, the container 10 includes an opening 11 and a bottom surface 14 having an area smaller than that of the opening 11. And the side wall part 15 formed in the inclined shape as a whole from the opening part 11 toward the bottom face part 14 is provided. The side wall portion 15 of the container 10 is formed with a plurality of groove portions having a V-shaped cross section that circulates in parallel over the entire periphery of the side wall portion 15, and a folding portion 20 that allows the container 10 to be folded in the vertical direction is formed. . Further, the folding part 20 is provided with a deformed vertical groove part 70 carved in the vertical direction. Details of the folding unit 20 and the folding structure Sf that operates at the same will be described later.

  As shown in FIG. 2, an opening edge 12 extending horizontally around the outer periphery of the opening 11 of the container 10 is formed, and at the same time, an opening wall 13 is also formed immediately below the opening edge 12. In the container 10, the inner side of the side wall part 15 is an inner wall surface part 16, and the outer side is an outer wall surface part 17. A space surrounded by the side wall portion 15 and the bottom surface portion 14 of the container 10 is a container interior 18. A bottom step 14 s is provided at the center of the bottom portion 14. In the illustrated example, the deformed vertical groove portion 70 is formed on the outer wall surface portion 17 of the side wall portion 15, and the auxiliary vertical groove portion 80 is formed on the inner wall surface portion 16.

  As shown in FIG. 1 and the like, the container 10 has a shallow bowl shape (bowl shape or bowl shape) in which the bottom surface portion 14 is curved and rounded. Further, as defined in the invention of claim 8, the cross-sectional shape of the side wall portion 15 of the container 10 is circular. This is for equalizing the force applied to the folding part 20 from the upper and lower sides of the container 10 through the side wall part 15 when the container is folded as shown in FIGS. And it is for suppressing the dispersion | variation in the amount of folding deformation which arises in the folding part 20 as much as possible. Details of the deformation will be described later.

  As understood from the container 10 of the first embodiment in FIG. 2, an upper folding groove portion 21 having a V-shaped cross section that circulates around the wall surface portion and a lower side on the inner wall surface portion 16 or the outer wall surface portion 17 of the side wall portion 15. A folding groove 22 is formed. In the container 10 of the illustrated first embodiment, the folding part 20 provided on the side wall part 15 is provided in two sets of the first folding part 30 and the second folding part 50 from above in the vertical direction of the container 10.

  The upper folding groove portion 21 and the lower folding groove portion 22 of the first folding portion 30 are formed on the inner wall surface portion 16 of the side wall portion 15. The upper folding groove portion 21 and the lower folding groove portion 22 of the second folding portion 50 are formed on the outer wall surface portion 17 of the side wall portion 15. Thus, by making the folding groove part in a mutual folding part into the wall surface part of an other side, the direction of the bending of the side wall part 15 can be made alternate. Reference numerals 27 and 28 in FIG. 2 denote activation grooves.

  Furthermore, the detail of the 1st folding part 30 and the 2nd folding part 50 which comprise two sets of folding parts 20 in the container 10 of 1st Example is demonstrated using the fragmentary longitudinal cross-sectional view of FIG. As illustrated, the first folding part 30 and the second folding part 50 are arranged in the vertical direction from the opening 11 of the container 10 toward the bottom part 14.

  In the first folding part 30, a groove having a V-shaped cross section of the first upper folding groove part 31 to be the upper folding groove part 21 is formed by the first upper inclined surface 33 and the first lower inclined surface 34. Similarly, a groove having a V-shaped cross section of the first lower fold groove portion 32 to be the lower fold groove portion 22 is formed by the second upper inclined surface 35 and the second lower inclined surface 36. The first joint apex 23 is formed by joining the first lower inclined surface 34 of the first upper folded groove 31 and the second upper inclined surface 35 of the first lower folded groove 32. The first upper fold groove portion 31 and the first lower fold groove portion 32 are formed over the entire circumference of the inner wall surface portion 16 of the side wall portion 15 through the first joint top portion 23.

  Further, the first upper fold groove portion 31 to be the upper fold groove portion 21 and the first lower fold groove portion 32 to be the lower fold groove portion 22 are formed as the activation groove portion 27 on the outer wall surface portion 17 opposite to the inner wall surface portion 16. One activation groove 37 is formed.

  In the second folding portion 50, a groove having a V-shaped cross section of the second upper folding groove portion 51 that becomes the upper folding groove portion 21 is formed by the third upper inclined surface 53 and the third lower inclined surface 54. Similarly, a groove having a V-shaped cross section of the second lower fold groove portion 52 to be the lower fold groove portion 22 is formed by the fourth upper inclined surface 55 and the fourth lower inclined surface 56. The second joint apex 24 is formed by joining the third lower inclined surface 54 of the second upper folded groove 51 and the fourth upper inclined surface 55 of the second lower folded groove 52. The second upper fold groove 51 and the second lower fold groove 52 are formed continuously over the entire circumference of the inner wall surface 16 of the side wall 15 via the second joint apex 24.

  Similarly, the inner wall surface portion 16 on the opposite side of the outer wall surface portion 17 where the second upper fold groove portion 51 to be the upper fold groove portion 21 and the second lower fold groove portion 52 to be the lower fold groove portion 22 are formed is used as the activation groove portion 28. A second activation groove 57 is formed.

  The first activation groove portion 37, which is one of the activation groove portions 27 having a V-shaped cross section, is the outer wall surface portion 17 on the opposite side of the inner wall surface portion 16 and corresponds to the position of the first joint top portion 23 of the outer wall surface portion 17. 25, that is, the side wall portion 15 is formed at a position that is line-symmetric with the first joint top portion 23 about the axis of symmetry. The first activation groove portion 37 is formed as a groove portion having a groove depth D2 that is shallower than the groove depth D1 of the first upper fold groove portion 31 and the first lower fold groove portion 32 that circulate around the inner wall surface portion 16.

  Similarly, the second activation groove portion 57 that is one of the activation groove portions 28 having a V-shaped cross section is the inner wall surface portion 16 on the opposite side of the outer wall surface portion 17, and a position 26 corresponding to the position of the second joint top portion 24. That is, the side wall portion 15 is formed at a position that is line-symmetric with the second joint apex portion 24 about the symmetry axis. The second activation groove portion 57 is formed as a groove portion having a groove depth D2 shallower than the groove depth D1 of the second upper fold groove portion 51 and the second lower fold groove portion 52 that circulate around the outer wall surface portion 17.

  Of the groove parts constituting the folding part 20 of the container 10, the upper folding groove part 21 (31, 51) and the lower folding groove part 22 (32, 52) play a role of deforming the container by being bent. Moreover, the 1st starting groove part 37 and the 2nd starting groove part 57 receive the deformation | transformation pressure added to a container once. At the same time, the first activation groove 37 (activation groove 27) transmits deformation pressure to the first upper fold groove 31 and the first lower fold groove 32, and the second activation groove 57 (activation groove 28) It is also considered to play a role of transmitting deformation pressure to the folding groove 51 and the second lower folding groove 52.

  As can be seen from the figure, the bottom of the first upper folding groove 31 having a V-shaped cross section is the first groove bottom 41. The second groove bottom portion 42 is formed in the first lower folded groove portion 32, the third groove bottom portion 43 is formed in the second upper folded groove portion 51, and the fourth groove bottom portion 44 is formed in the second lower folded groove portion 52, respectively. Next, a portion that crosses the side wall portion 15 in the thickness direction from the first groove bottom portion 41 is a first deforming portion 45 (a portion to be deformed) in the first upper folding groove portion 31. Similarly, a second deforming portion 46 is generated in the first lower folding groove portion 32, a third deforming portion 47 is generated in the second upper folding groove portion 51, and a fourth deforming portion 48 is generated in the second lower folding groove portion 52.

  The groove depth of each folding groove is defined by the upper folding groove 21 (first upper folding groove 31, second upper folding groove 51) and lower folding groove 22 (first lower groove), as defined in the invention of claim 5. The groove depth D1 of the side fold groove portion 32 and the second lower fold groove portion 52) is formed deeper than half the thickness Tn of the general portion of the side wall portion 15, that is, the portion where various groove portions do not exist. Based on the fact that the groove depth is reliably bent at the folding groove portion due to the deformation pressure applied to the container, this groove depth balances both the maintenance of the strength of the folding groove portion before folding and the appropriate weakening of each folding groove portion (each deformation portion). The amount calculated in consideration of the material of the container.

  A deformed vertical groove portion 70 formed in a V shape in the cross section of the container is formed between the activation groove portion 37 in the first folding portion 30 and the upper folding groove portion of the second folding portion 50. The deformed vertical groove portion 70 has a triangular (wedge shape) shape including an upper end portion 71 and a lower end portion 72 as can be understood from FIG. The starting point of the upper end portion 71 of the deformed vertical groove portion 70 is a lower portion of the activation groove portion 37 of the first folding portion 30. The end point of the lower end portion 72 of the deformed vertical groove portion 70 is near the third groove bottom portion 43 of the second upper folding groove portion 51 in the second folding portion 50. The upper and lower groove portions from the lower part of the first activation groove portion 37 of the first folding portion 30 to the vicinity of the third groove bottom portion 43 of the second upper folding groove portion 51 in the second folding portion 50 are partitioned. A portion of the outer wall surface portion 17 to be formed is an outer groove forming wall portion 17w.

  The amount of the groove depth dv of the deformed vertical groove portion 70 is increased from the first folding portion 30 side to the second folding portion 50 as specified in the invention of claim 2. This is because the influence of the wall thickness of the side wall 15 itself and the groove depth in the first lower folding groove 32 of the first folding part 30 is taken into consideration, so that an extremely thin part is not generated. The inclination generated from the upper end 71 to the lower end 72 of the deformed vertical groove 70 is generally flat.

  In addition, in the container 10, as defined in the invention of claim 7, the auxiliary vertical portion formed in a V-shaped cross section on the inner wall surface portion 16 opposite to the outer wall surface portion 17 in which the deformed vertical groove portion 70 is formed. A groove 80 is provided. The auxiliary vertical groove 80 is not necessarily essential in the container, but has an effect of easily causing the container to be folded and deformed as described later. The auxiliary fold groove 80 is formed by the upper and lower grooves from the second groove bottom 42 of the first lower fold groove 32 in the first fold 30 to the vicinity of the second activation groove 57 of the second fold 50. The inner wall surface portion 16 is an inner groove forming wall portion 16w.

  Therefore, the folding structure Sf is a deformed vertical groove part between the upper and lower folding parts together with the three sets of the upper folding groove part, the lower folding groove part, and the starting groove part included in the first folding part 30 and the second folding part 50. 70. Further, an auxiliary vertical groove 80 is also added if necessary.

  According to the container 10 of the first embodiment of the disclosure, the maximum diameter of the container is 180 mm, the opening diameter is 155 m, the overall height is 62.5 mm, the thickness of the general part of the side wall is about 3.0 mm, and the upper folding groove part The groove depth of the lower folding groove portion is about 2.0 mm, and the groove depth of the starting groove portion is 1.0 mm. Further, the length of the deformed vertical groove portion is 12 mm, and the length of the auxiliary vertical groove portion is 12 mm. Of course, since this is an example, appropriate changes are possible.

  The arrangement of the deformed vertical groove portion 70 and the auxiliary vertical groove portion 80 will be further described with reference to FIGS. FIG. 4 is a bottom view showing the container 10 with a quarter cut away. The deformed vertical groove portion 70 formed in the outer wall surface portion 17 cuts the corresponding portion of the outer wall surface portion 17 into a V shape to reduce the thickness of the side wall portion 15. The number of the deformed vertical groove portions 70 is set in consideration of the size of the container, the thickness of the side wall portion, the ease of bending, and the like.

  Therefore, as defined in the invention of claim 6, a plurality of deformed longitudinal groove portions 70 are formed at equal intervals on the outer wall surface portion 17. In this example, the individual deformed flutes 70 are arranged at an angle R with respect to the center C of the circular container. Since the angle R is set to 15 °, the deformed flutes 70 are formed in 24 places in the entire container 10. By arranging a plurality of the deformed longitudinal groove portions 70 evenly, it is possible to fold easily and with good appearance.

  FIG. 5 is a plan view showing the container 10 with a quarter cut away. That is, it is a state inside the container 10. The auxiliary vertical groove portion 80 is formed at an intermediate position between the deformed vertical groove portions 70. Using the center C of the circular container as a reference, the auxiliary vertical groove portion 80 is formed at an angle R ′ (7.5 °) at an intermediate position of the angle R (15 °) of the arrangement of the deformed vertical groove portions 70. The auxiliary vertical groove portions 80 are formed at intervals of an angle R ″ (15 °) with respect to the same position. Accordingly, the auxiliary vertical groove portions 80 are always formed in the middle of the deformed vertical groove portions 70 formed on the circumference. The auxiliary vertical groove portion 80 assists bending in accordance with the deformation vertical groove portion 70 when the container 10 is folded and deformed.

  FIG. 6 is an overall perspective view after the container 10 is folded. A total of four of the first deformation part 45 and the second deformation part 46 included in the first folding part 30 (20), and the third deformation part 47 and the fourth deformation part 48 included in the second folding part 50 (20) at the same time. The side wall part 15 is in a state of being folded along with the bending at the location. As can be understood from the comparison between FIG. 1 and FIG. 6, the original bowl-shaped container 10 is folded by pressing from above and below, and the overall height of the container becomes shallow and becomes like a dish. In the first embodiment container 10, by folding, the initial height of the container 62.5 mm is contracted to about 35 mm, and the container volume is reduced.

  The shape deformation of the container 10 after being folded together with the partial cross-sectional view of FIG. 7 will be described. As can be easily seen from FIG. 7, the first deforming portion 45 and the second deforming portion 46 of the first folding portion 30 and the third deforming portion 47 and the fourth deforming portion 48 of the second folding portion 50 are both sidewalls. Since the thin portion (the first groove bottom 41, the second groove bottom 42, the third groove bottom 43, and the fourth groove bottom 44) of the portion 15 is formed, it is bent from the initial angle with the same portion as the rotation center ( Be buckled). Since a plurality of folding groove portions are formed in each of the inner wall surface portion 17 and the outer wall surface portion 17 of the side wall portion 15, the first deformation portion 45, the second deformation portion 46, the third deformation portion 47, and the fourth deformation portion 48 are Then, it can be bent and closed so as to sandwich the V-shaped groove from the initial flat state. Therefore, the bending at the corresponding portion is smooth.

  When viewed in the entire cross section of the illustrated container 10, the side wall portion 15 is folded in an approximately inverted N-shaped zigzag shape. As a result, the volume of the container interior 18 is reduced and the volume can be reduced. In the drawing, the second deforming portion 46 and the fourth deforming portion 48 protrude and bend somewhat more than others. Which of the first to fourth deformed parts is folded greatly depends on the deformation pressure when the container is crushed, the thickness of each part of the side wall of the container 10, the size and shape of the container itself, and the like.

  From this, the state of the folding deformation of each part including the groove part included in the first folding part 30 as a representative will be described using the partially enlarged end view in the vicinity of the first folding part 30 shown in FIGS. To do. Since the 2nd folding part 50 has the same groove part and is the arrangement | positioning relationship opposite front and back, illustration and description are abbreviate | omitted.

  FIG. 8 shows an initial stage of folding deformation, in which a deformation pressure is applied from the vertical direction of the container 10. Paying attention to both the first joint top 23 and the first activation groove 37, the upper and lower first lower inclined surfaces 34 and the second upper inclined surface 35 of the first joint top 23 and the upper and lower in the first activation groove 37. Due to the inclined surfaces 37p and 37q, the cross-section has a letter shape. Therefore, since the first activation groove portion 37 is formed in the side wall portion 15, the deformation pressure once concentrates on the first activation groove portion 37 from the vertical direction of the container 10, and is combined through the inclinations of the inclined surfaces to the first joint. It becomes the force (arrow F1) of the direction which the top part 23 protrudes. As a result, the 1st joint top part 23 protrudes in the arrow F1 direction.

  FIG. 9 shows the middle stage of the folding deformation. Triggered by the protrusion of the first joint top 23 in the direction of the arrow F1, the first joint top 23 and the first activation groove 37 are the first upper folding groove 31 positioned above and below the first joint top 23. The bending deformation of the first deforming portion 45 or the second deforming portion 46 of the first lower folding groove portion 32 is induced. The illustration shows a disclosure example of bending of the first deformable portion 45. The first lower inclined surface 34 and the inclined surface 37p are pulled toward the first joint top portion 23 side in conjunction with the protrusion of the first joint top portion 23 in the arrow F1 direction. And the distortion which protrudes to the outer wall surface part 17 side of the side wall part 15 arises in the 1st deformation | transformation part 45 of the 1st upper side folding groove part 31 so that it may become reverse direction to the arrow F1 direction.

  In the first upper folding groove portion 31 of the first folding portion 30, the first upper inclined surface 33 and the first lower inclined surface 34 are formed only on the inner wall surface portion 16 side, and the opposite outer wall surface portion 17 remains flat. Therefore, the deformation pressure is almost certainly concentrated on the first groove bottom 41 (first deformation portion 45). And the 1st deformation | transformation part 45 of the 1st upper side folding groove part 31 begins to bend in the arrow F2 direction.

  FIG. 10 shows the final stage of the folding deformation. The first deformed portion 45 of the first upper folding groove portion 31 protrudes (see the direction of arrow F3), and the first upper inclined surface 33 and the first lower inclined surface 34 approach each other and are V-shaped. It will be bent. Although not shown, the same bending operation as that of the first deforming portion 45 of the disclosed first upper folding groove portion 31 occurs also in the second deforming portion 46 of the first lower folding groove portion 32. Further, the second folding portion 50 also bends at the third groove bottom portion 43 of the second upper folding groove portion 51 with the second activation groove portion 57 as a trigger.

  11 and 12 are partially enlarged views of the bottom surface and the top surface of the container 10 (see FIG. 6) after being folded, and correspond to FIGS. 4 and 5 described above.

  In the bottom view of FIG. 11 (view of the container from the bottom), the first folding part 30 protrudes downward and the second folding part 50 enters the inside of the container due to folding deformation (buckling) of the container 10. is there. The outer groove forming wall portion 17w in which the deformed vertical groove portion 70 is formed is reversed from the initial bowl-shaped inclination. In this state, in the vicinity of the upper end portion 71 of the deformed vertical groove portion 70, the amount of deformation of the heights of the upper and lower first lower inclined surfaces 34 and the second upper inclined surface 35 of the first joint apex portion 23 remains. However, in the vicinity of the lower end portion 72 of the deformed vertical groove portion 70, the deformation amount includes the height of the outer groove forming wall portion 17w, and the circumference including the same portion contracts toward the lower end portion 72 side. That is, the force indicated by the arrow H1 is generated in the outer groove forming wall portion 17w, and the side wall portion 15 is forced to be deformed and deformed.

  If the deformed longitudinal groove portion 70 does not exist, longitudinal grooves are randomly generated in the outer wall surface portion 17. When the container is folded together with the material and shape of the container, there is a risk that an extra pressing force is required. On the other hand, the presence of the deformed vertical groove portion 70 having a V-shaped cross section and a deeper groove toward the lower side further reduces the shrinkage on the lower end 72 side of the deformed vertical groove portion 70 where the amount of contraction deformation of the circumference increases. Can be easily.

  In particular, since the plurality of deformed vertical groove portions 70 are formed uniformly, the stress during deformation can be concentrated on the deformed vertical groove portion 70 without dispersing the force (arrow H1) generated by the circumferential contraction deformation. . The deformed vertical groove portion 70 is deformed so as to narrow the groove width (circumference of the portion) of the V-shaped groove in conjunction with the contraction deformation of the circumferential diameter, and the outer groove forming wall portion 17w and the upper and lower outer wall surface portions thereof. The contraction deformation of the circumference diameter of 17 becomes flexible and smooth. As a result, the folding deformation (buckling) in the side wall portion 15 of the container 10 does not require excessive force and can be performed without difficulty. In the figure, symbol G is a wrinkle generated on the surface of the outer wall surface portion 17 from the upper end portion 71 and the lower end portion 72 of the deformed vertical groove portion 70.

  In the top view of FIG. 12 (view of the container from above), the second folded part 50 protrudes upward and the first folded part 30 falls to the outside of the container due to folding deformation (buckling) of the container 10. is there.

  In the container 10, the inner groove forming wall portion 16 w in which the auxiliary vertical groove portion 80 is formed and the outer groove forming wall portion 17 w have a reverse relationship. As described above, when a circumferential reduction deformation occurs in the direction indicated by the arrow H1 on the outer groove forming wall portion 17w side, particularly on the lower end portion 72 side of the deformed vertical groove portion 70, on the opposite surface of the outer groove forming wall portion 17w. An expanding force indicated by an arrow H2 acts on the inner groove forming wall portion 16w. In this case, since there is a thinned portion by the auxiliary vertical groove 80 on the inner groove forming wall 16w, deformation on the inner groove forming wall 16w side is facilitated in accordance with the pulling by the force of the arrow H2.

  Accordingly, the auxiliary vertical groove portion 80 assists the deformation caused by the folding of the outer wall surface portion 17 (outer groove forming wall portion 17w) where the deformed vertical groove portion 70 is formed from the inner groove forming wall portion 16w on the opposite side. And it plays the role which makes folding deformation (buckling) of the container 10 easy as a whole. In addition, since the auxiliary | assistant vertical groove part 80 is formed in the intermediate position between deformation | transformation vertical groove parts 70, the side wall part 15 of the container 10 is thinned from both front and back surfaces, and does not become weak.

  FIG. 13 shows a container 10A according to the second embodiment of the present invention. In the container 10A, the formation surface of the first foldable part 30 and the second foldable part 50 is opposite to that of the container 10 described above. That is, as defined in the invention of claim 3, the upper fold groove portion 21 (first upper fold groove portion 31) and the lower fold groove portion 22 (first lower fold groove portion 32) of the first fold portion 30 are the outer wall surface portion 17. Formed. At the same time, the upper fold groove portion 21 (second upper fold groove portion 51) and the lower fold groove portion 22 (second lower fold groove portion 52) of the second fold portion 50 are formed in the inner wall surface portion 16. Each structural element such as the individual fold grooves, the start groove, and the joint top included in the first fold 30 and the second fold 50 is the same as that described in the container 10 of the first embodiment. For this reason, the same code | symbol is used and separate description is abbreviate | omitted.

  Similarly, in the container 10 </ b> A, the first folding part 30 has a lower folding groove part 22 (first lower folding groove part 32) and the activation groove part 28 (second activation groove part 57) in the second folding part 50. A deformed vertical groove portion 70 formed in a V shape in the cross section of the container is provided. The starting point of the upper end 71 of the inverted triangular groove 70 is the vicinity of the groove bottom of the second lower inclined surface 36 of the first folding part 30. The end point of the lower end portion 72 of the deformed vertical groove portion 70 is an upper portion of the second activation groove portion 57. A portion of the outer wall surface portion 17 where the deformed vertical groove portion 70 is formed is an outer groove forming wall portion 17w.

  As understood from the drawing and defined in the invention of claim 4, the groove depth of the deformed longitudinal groove portion 70 increases from the second folding portion 50 side to the first folding portion 30. This is because, like the container 10, in consideration of the influence of the thickness of the side wall 15 itself and the groove depth of the second upper folding groove 51 of the second folding part 50, an extremely thin part is not generated. The illustrated container 10A has a configuration in which only the deformed flutes 70 are formed and the auxiliary flutes are omitted.

  The folding deformation of the container 10A also has a zigzag buckling similar to that shown in FIGS. Also in this case, the stress due to the circumferential contraction generated in the outer groove forming wall portion 17w is concentrated on the deformed vertical groove portion 70, and acts to narrow the V-shaped groove width of the deformed vertical groove portion 70.

  In the container 10A, since the groove depth of the deformed longitudinal groove portion 70 is increased from the second folding portion 50 side to the first folding portion 30, the circumferential diameters of the outer groove forming wall portion 17w and the upper and lower outer wall surface portions 17 thereof. The shrinkage deformation is soft and smooth. The deformed vertical groove portion 70 is deformed so as to narrow the groove width of the V-shaped groove (the circumference of the portion) in conjunction with the contraction deformation of the circumferential diameter. As a result, the folding deformation (buckling) in the side wall portion 15 of the container 10 does not require excessive force and can be performed without difficulty.

  FIG. 14 is a schematic diagram showing a cross-sectional structure of the container of the present invention. The containers 10 and 10A of the embodiment are mainly formed of a foamed synthetic resin material made of polystyrene paper (PSP) or the like. And as prescribed | regulated to invention of Claim 9, a resin film is affixed on either the whole inner wall surface part (inner wall surface part 16) of the said container, the whole outer wall surface part (outer wall surface part 17), or both. As the resin film, a thermoplastic film formed mainly from an appropriate flexible and easily deformable resin such as polypropylene, polyethylene, polystyrene, or polyethylene terephthalate (PET) is mainly used. This resin film is stuck (fused) to the foamed synthetic resin material side by heat lamination such as heat sealing.

  In FIG. 14A, the resin film 15 p is attached to the entire surface on the outer wall surface 17 side, which is one side of the side wall portion 15. By providing the resin film 15p, the outer surface of the container is hardly damaged and can be decorated with a film, so that a beautiful appearance can be obtained. Further, as shown in FIG. 14B, the resin film 15q can also be adhered to the entire surface on the inner wall surface 16 side and the outer wall surface 17 side which are both sides of the side wall portion 15. In this case, direct contact between the container contents and the side wall portion can be prevented.

  When shrinkage due to bending accumulates in the foamed synthetic resin material, wrinkles and cracks are likely to occur in the bent portion, although it depends on the thickness of the container itself and the number of times of bending. Therefore, by sticking the resin film to the foamed synthetic resin material, it is possible to reinforce the bent portions (each groove portion) generated in the foamed synthetic resin material containers 10 and 10A (folded portion 20) during folding deformation.

  In addition, the containers 10 and 10A including the folding structure Sf that operates in the folding unit 20 are also used as a container for food and drink, or are used when food and drink are provided. The kind of food and drink to be put in the container (food and drink to be provided and provided) is appropriate depending on the place of provision, application, sales form, and the like. As mentioned above, food and drink provided in a warm state such as noodles, bowls, stews, soups, hot drinks, etc., as well as food and drinks (dry products etc.) that are poured in hot water and eaten in a warm state, or ice cream Examples of food and drink provided in a cold state, such as sherbet and drink. And it is food (including instant food) containing these foods and drinks.

  According to the containers 10 and 10A described in detail with reference to the drawings, as can be understood from the folding structure Sf provided in the folding part 20 (30, 50), the container is provided on the side wall part 15 without depending on the bellows structure. Moreover, the structure of the suitable combination of the groove part which circulates the some container, and the groove part of the vertical direction can fold a container which has not existed before. After the folding of the container proceeds and the yield point of the foamed synthetic resin material is exceeded, the original shape before folding cannot be easily restored only by the elasticity of the foamed synthetic resin material of the container.

  By applying the container according to the present invention and the folding structure incorporated in the container, the volume of the foamed synthetic resin container after use can be reduced very easily. Therefore, when the container is discarded and collected, space saving is advanced and the collection efficiency can be improved. In particular, workability is good because the shape after folding is maintained constant. Contributing to reducing the cost of collecting used containers as resources is important in addressing environmental issues. Therefore, a decrease in the volume of the container after use can exert a great appeal to container users such as retail stores and container users such as purchasers.

  Moreover, in the foodstuff which used the container which concerns on this invention and put food and drink into this, the container after eating can be folded and the process of a container becomes easy. Therefore, since the food and drink and the container are always sold together, the advantage of reducing the volume of the container itself is great, and finally, the improvement of the container leads to the enhancement of the appeal of the food.

  The container of the present invention is planned to be provided in the state before folding as shown in FIG. In addition to this, it is also possible to provide a state after being folded as shown in FIG. In this case, the container folded on the user side is spread and used. Therefore, in some cases, bidirectional deformation of the container is also possible.

  In addition, as long as the size and shape of the container of the container of the present invention, and the direction and number of the folding parts are in accordance with the gist of the invention, within the range that can be crushed by human hands, the purpose and use of the container, It is selected optimally considering the contents. For this reason, it is not limited only to the structure and structure of the Example shown and explained in full detail. For example, the total height of the container can be made higher than that of the embodiment, and the folding parts can be increased to four alternate groups.

DESCRIPTION OF SYMBOLS 10 Container 11 Opening part 14 Bottom face part 15 Side wall part 15p, 15q Resin film 16 Inner wall surface part 16w Inner groove formation wall part 17 Outer wall surface part 17w Outer groove formation wall part 20 Folding part 21 Upper folding groove part 22 Lower folding groove part 23 1st joint Top part 24 Second joint top part 27, 28 Starting groove part 30 First folding part 31 First upper folding part 32 First lower folding part 33 First upper slope 34 First lower slope 35 Second upper slope 36 Second lower inclined surface 37 First activation groove portion 50 Second folding portion 51 Second upper folded groove portion 52 Second lower folded groove portion 53 Third upper inclined surface 54 Third lower inclined surface 55 Fourth lower inclined surface 55 Fourth upper inclined surface 56 Fourth lower portion Inclined surface 57 Second activation groove portion 70 Deformed vertical groove portion 80 Auxiliary vertical groove portion D1 Groove depth of upper and lower fold groove portions Tn Thickness of general portion of side wall portion Sf Folding structure Groove depth of dv deformation vertical groove

Claims (9)

Mainly made of a foamed synthetic resin material, and having an opening, a bottom surface having a smaller area than the opening, and a side wall that is formed in an inclined shape as a whole from the opening toward the bottom surface and can be folded vertically. In the container,
On either the inner wall surface portion or the outer wall surface portion of the side wall portion, there are an upper fold groove portion and a lower fold groove portion having a V-shaped longitudinal section that circulates around the wall surface portion, and a lower inclined surface and the lower side of the upper fold groove portion. Formed continuously through the joint top with the upper inclined surface of the folded groove,
From the upper fold groove portion and the lower fold groove portion that circulate around the wall surface portion at a position corresponding to the joint top position of the wall surface portion opposite to the wall surface portion on which the upper fold groove portion and the lower fold groove portion are formed. A folding portion formed with a starting groove portion having a V-shaped longitudinal section having a shallow groove portion,
Two sets of the folding part are provided as a first folding part and a second folding part from above in the vertical direction of the container, and an upper folding groove part and a lower folding groove part in the first folding part are formed on the inner wall surface part, and Forming an upper fold groove and a lower fold groove in the second fold on the outer wall surface;
A container folding structure comprising a deformed vertical groove formed in a V-shaped cross section between the activation groove in the first folding part and the upper folding groove in the second folding part.   When the upper folding groove and the lower folding groove of the first folding part are formed on the inner wall surface, and the upper folding groove and the lower folding groove of the second folding part are formed on the outer wall surface. 2. The container folding structure according to claim 1, wherein the deformed vertical groove portion has a groove depth that is increased from the first folding portion side to the second folding portion. Mainly made of a foamed synthetic resin material, and having an opening, a bottom surface having a smaller area than the opening, and a side wall that is formed in an inclined shape as a whole from the opening toward the bottom surface and can be folded vertically. In the container,
On either the inner wall surface portion or the outer wall surface portion of the side wall portion, there are an upper fold groove portion and a lower fold groove portion having a V-shaped longitudinal section that circulates around the wall surface portion, and a lower inclined surface and the lower side of the upper fold groove portion. Formed continuously through the joint top with the upper inclined surface of the folded groove,
From the upper fold groove portion and the lower fold groove portion that circulate around the wall surface portion at a position corresponding to the joint top position of the wall surface portion opposite to the wall surface portion on which the upper fold groove portion and the lower fold groove portion are formed. A folding portion formed with a starting groove portion having a V-shaped longitudinal section having a shallow groove portion,
Two sets of the folding part are provided as a first folding part and a second folding part from above in the vertical direction of the container, and an upper folding groove part and a lower folding groove part in the first folding part are formed in the outer wall surface part, and Forming an upper fold groove portion and a lower fold groove portion in the second fold portion on the inner wall surface portion;
A container folding structure comprising: a deformed vertical groove portion formed in a V-shaped cross section between the lower folding groove portion of the first folding portion and the activation groove portion in the second folding portion. .   In the case where the upper fold groove portion and the lower fold groove portion of the first fold portion are formed on the outer wall surface portion, and the upper fold groove portion and the lower fold groove portion of the second fold portion are formed on the inner wall surface portion. 4. The container folding structure according to claim 3, wherein the deformed vertical groove portion has a groove depth increased from the second folding portion side to the first folding portion. 5.   The container folding according to any one of claims 1 to 4, wherein a groove depth of the upper fold groove portion and the lower fold groove portion is formed deeper than half of a thickness of the general portion of the side wall portion. Construction.   The container folding structure according to any one of claims 1 to 5, wherein a plurality of the deformed vertical groove portions are formed in the wall surface portion at equal intervals.   7. A wall surface portion opposite to the wall surface portion where the deformed longitudinal groove portion is formed, and an auxiliary longitudinal groove portion formed in a V-shaped cross section is provided at an intermediate position between the deformed longitudinal groove portions. The container folding structure according to any one of the above.   The container folding structure according to any one of claims 1 to 7, wherein the container has a circular cross-sectional shape.   The container folding structure according to any one of claims 1 to 8, wherein a resin film is adhered to either or both of the entire inner wall surface portion and the entire outer wall surface portion of the container.

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