JP2014000966A - Box type container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a box type container capable of securing safe strength while reducing its weight and thickness of sidewall parts.SOLUTION: A foldable container 1 comprises a substantially rectangular plate-shaped bottom wall part 11, and long side sidewall parts 12 and short side sidewall parts 13, each of which extends upward from each of side edges of the bottom wall part 11. The short side sidewall parts 13 each include a base wall part 31, and a plurality of vertical ribs 36 that project outward from an outer surface of the base wall part 31, and extend in a height direction of the short side sidewall parts 13. Some of vertical ribs 36 each include a reinforcement projection 44 in a portion including a central portion in a height direction of the base wall part 31, and have a projection length from the base wall part 31, which is formed longer than that of other normal parts 43.

Description

  The present invention relates to a box-type container used for transportation of articles.

  2. Description of the Related Art Conventionally, a box-shaped container includes a substantially rectangular plate-shaped bottom wall portion and a side wall portion extending upward from a side portion of the bottom wall portion, and is configured to take in and out articles from above. Further, in order to increase the strength of the side wall portion, the portions near the both side portions of the side wall portion bulge outward in the box-shaped container along the vertical direction, and the concave portion formed on the inner surface side of the bulged portion. There is a technique in which a rib extending in the horizontal direction is provided on the inside (see, for example, Patent Document 1).

Japanese Patent No. 3491646

  However, in the technique of Patent Document 1 described above, the strength of the side wall portion when it is compressed in the width direction or the thickness direction is increased, but when the box-type containers are stacked one above the other, When a load (a force compressed in the height direction of the side wall portion) from the upper side to the lower side is applied, the side wall portion may be deformed (buckled) into a substantially square shape.

  The present invention has been made to solve the above-described problems and the like, and its purpose is a box type that can secure a safer strength while reducing the weight and reducing the thickness of the side wall. To provide a container.

  In the following, each means suitable for solving the above-mentioned purpose will be described in terms of items. In addition, the effect etc. peculiar to the means to respond | correspond as needed are added.

Means 1. In a box-shaped container comprising a substantially rectangular plate-like bottom wall portion and side wall portions extending upward from each side portion of the bottom wall portion,
At least one of the side wall portions includes a base wall portion and vertical ribs protruding from the outer surface or the inner surface of the base wall portion and extending in the height direction of the side wall portion,
The vertical rib includes a reinforcing protrusion that is formed so that a protrusion length from the base wall portion is longer than that of the other general portion in a portion including a central portion in the height direction of the base wall portion. Box-type container to play.

  According to the means 1, the reinforcement protrusion part comprised in the vertical rib from the base wall part with the comparatively long protrusion length is provided. In particular, the reinforcing protrusion is provided corresponding to the central portion in the height direction, which is a portion where a relatively large stress is easily applied when a load compressed in the vertical direction is applied to the side wall portion. For this reason, the deformation | transformation of a side wall part when the load which is compressed to an up-down direction with respect to a side wall part is added (for example, box-shaped containers were stacked up and down) effectively and more reliably can do.

  The box-type container includes one in which the bottom wall portion and each side wall portion are integrally formed, and one in which each side wall portion is provided so as to be rotatable with respect to the bottom wall portion and the like and can be folded. However, especially for those that can be folded, the strength of each of the side wall portions is further required, and further compactness is required at the time of folding, so that it can be enjoyed by adopting the configuration of this means. The effect is very large. Further, among the four side wall portions, the pair of opposite side wall portions is provided with a hinge portion at an intermediate position in the vertical direction, and when folded, the side wall portion needs to be bent at the intermediate position in the vertical direction. In this case, the strength of the remaining pair of opposite side walls is further required. For this reason, also in such a case, the effect which can be enjoyed by employ | adopting the structure of this means becomes a still bigger thing.

  Mean 2. 2. The box-type container according to claim 1, further comprising a reinforcing wall portion extending from at least a part of the reinforcing protrusion of the vertical rib so as to face the outer surface of the base wall portion. .

  According to the means 2, when a stress for deforming the base wall portion acts on the side wall portion, the base wall portion, the vertical rib, and the reinforcing wall portion cooperate to deform the base wall portion. Can be suppressed. In particular, since the reinforcing wall portion is provided corresponding to the reinforcing protruding portion, the strength of the side wall portion against a load that is compressed up and down is coupled with the deformation preventing effect of the side wall portion by the reinforcing protruding portion. Can be further increased. Furthermore, by providing the reinforcing wall portion, it is possible to ensure sufficient strength even if the number of reinforcing ribs is reduced or the length of protrusion of the reinforcing rib from the base wall portion is shortened as a whole. The side wall portion can be reduced in weight and thickness. As a result, the box-type container is light and compact, and it is possible to improve transportation and storage performance and save resources.

  In addition, if the protruding length of the vertical rib is increased, the strength of the vertical rib itself may be reduced. However, as described above, the reinforcing protruding portion having a relatively long protruding length is provided with a reinforcing wall portion. Such problems can be suppressed, and damage to the vertical ribs can be suppressed.

  Note that “the reinforcing wall portion and the base wall portion may be connected by at least two vertical ribs”. In this case, a cylindrical part will be formed by a reinforcement wall part, a base wall part, and a pair of vertical rib, and the intensity | strength of a side wall part can be improved dramatically. Further, for example, the durability of the vertical ribs and the reinforcing wall part itself can be improved as compared with the case where the reinforcing wall part and the base wall part are connected by a single rib. Further, “a pair of vertical ribs protruding from the side surfaces of the vertical ribs and connecting the base wall part and the reinforcing wall part facing each other, or connecting the base wall part, the reinforcing wall part, and the both. It is good also as providing the inner auxiliary wall provided in frame shape along the inner peripheral surface of a cylindrical part inside the cylindrical part comprised. In this case, deformation of the vertical ribs and the reinforcing wall portion can be prevented more reliably, and the strength of the side wall portion can be further improved. Moreover, even if the inner auxiliary wall is provided inside the cylindrical portion constituted by the base wall portion, the reinforcing wall portion, and the pair of vertical ribs, the inner auxiliary wall is formed into a frame shape so that the cylindrical portion communicates vertically. It is possible to make it difficult to collect dust and water inside the tubular portion.

Means 3. The side wall is configured to be rotatable relative to the bottom wall, and in a box-type container that can be folded so that the side walls overlap each other,
The reinforcing protrusions are formed on at least two of the side wall portions, and portions of the base wall portion corresponding to the reinforcing protrusion portions formed on the side wall portions do not come into contact with each other. The box-type container according to means 2 described above.

  According to the means 3, in the foldable box-shaped container, even if the side wall portions formed with the reinforcing protrusions are stacked one above the other, the portions where the reinforcing protrusions are formed do not overlap each other. The height of the stacked side wall portions as a whole can be suppressed. Therefore, the box-type container in the folded state can be further reduced in size. In addition, another vertical rib may exist between a pair of vertical ribs connected by the reinforcing wall portion.

It is a perspective view of the folding container in 1st Embodiment. It is a perspective view of the folding container which made the cover member an open state. It is a perspective view of the folding container in the process of folding or an assembly. It is a perspective view of the folded folding container. It is the sectional view on the AA line of FIG. It is the perspective view which looked at the short side wall part from the inner surface side. It is the perspective view which looked at the short side wall part from the outer surface side. It is a perspective view containing the BB line cross section of FIG. It is the BB sectional view taken on the line of FIG. It is sectional drawing for demonstrating the slide type | mold which shape | molds a cylindrical part. It is a perspective view of the folding container in 2nd Embodiment. It is a perspective view of the folding container which made the cover member an open state. It is a perspective view of the folded folding container. It is CC sectional view taken on the line of FIG. It is the perspective view which looked at the short side wall part from the inner surface side. It is the perspective view which looked at the short side wall part from the outer surface side. It is a perspective view containing the DD sectional view of FIG. It is a perspective view of the folding container in 3rd Embodiment. It is a perspective view which shows the folding container folded. It is the EE sectional view taken on the line of FIG. It is the perspective view which looked at the short side wall part in another embodiment from the outer surface side. It is a perspective view containing the FF line cross section of FIG. It is a perspective view including the GG line cross section of FIG. It is the perspective view which looked at the short side wall part in another embodiment from the outer surface side.

(First embodiment)
The first embodiment will be described below with reference to the drawings. As shown in FIGS. 1 and 2, a folding container 1 as a box-shaped container has a substantially square box shape that opens upward, and can open and close a container body 2 that can store articles and an opening of the container body 2. And a pair of lid members 3. The container body 2 and the lid member 3 of the present embodiment are each made of polypropylene.

  The container body 2 includes a substantially rectangular plate-like bottom wall portion 11, a long side wall portion 12 provided corresponding to a pair of opposing long side portions of the bottom wall portion 11, and a relative relationship between the bottom wall portion 11. A short side wall portion 13 provided corresponding to each of the pair of short side portions, and a rectangular frame-shaped upper frame provided along the upper side portions of the long side wall portion 12 and the short side wall portion 13 14.

  Moreover, as shown in FIGS. 3-5, the container main body 2 of this embodiment is comprised so that folding is possible. That is, the long side wall portion 12 is rotatably connected to the lower wall portion 15 that is rotatably connected to the long side portion of the bottom wall portion 11 and the long side portion of the upper frame 14. And an upper side portion of the lower wall portion 15 and a lower side portion of the upper wall portion 16 are rotatably connected. In the present embodiment, as shown in FIG. 3, the outer surface and the lower wall portion of the upper wall portion 16 are pressed by pressing the connecting portion between the upper wall portion 16 and the lower wall portion 15 into the container body 2. The long side wall portion 12 can be folded so as to be aligned with the outer surface.

  The short side wall 13 is rotatably connected to the short side of the upper frame 14. In this embodiment, by pressing the short side wall 13 so as to be pushed into the inside of the container body 2, the short side wall 13 can be rotated until it extends substantially horizontally (FIG. 5). reference). Further, the lateral width of the short side wall 13 is substantially the same as the distance between the pair of long side walls 12, and is positioned between the pair of long side walls 12 in the assembled state of the container body 2. In addition, the rotation axis of the short side wall 13 and the upper frame 14 is located above the rotation axis of the long side wall 12 and the upper frame 14. For this reason, the container main body 2 in the assembled state first presses the pair of short side wall portions 13 toward the inside of the container main body 2 and rotates them until they extend horizontally, and then the pair of long side side walls. The part 12 can be folded by folding. In the assembled state of the container body 2, the short side wall 13 and the bottom wall 11 are locked, and the short side wall 13 and the long side wall 12 are locked. Means may be provided.

  As shown in FIG. 2, the upper frame 14 includes a pair of long side portions (hereinafter referred to as “long side frame constituting portion 17”) connected to the pair of long side wall portions 12, and a pair of short sides. A pair of short side portions (hereinafter referred to as “short side frame constituting portions 18”) respectively connected to the side side wall portions 13, and the outer size of the upper frame 14 is the same as the outer size of the bottom wall portion 11. It is almost equal. Further, in the assembled state of the container body 2, the inner surfaces of the long side wall portion 12 and the short side wall portion 13 and the inner peripheral surface of the upper frame 14 are substantially flush with each other. In addition, the long side wall 12 and the short side wall 13 do not protrude beyond the outer periphery of the upper frame 14 or the bottom wall 11 even when the container body 2 is assembled. It is configured (see FIG. 1). In the folded state of the container body 2, the folded long side wall portion 12 and the short side wall portion 13 that overlaps the long side wall portion 12 are accommodated on the inner peripheral side of the upper frame 14 and the bottom wall portion 11. And the upper frame 14 are in direct contact with each other in the vertical direction (see FIGS. 4 and 5).

  In addition, as shown in FIG. 5, on the lower surface side of the bottom wall portion 11, the bottom wall portion 11 has a lower side from a range located on the inner peripheral side of the upper frame 14 when the container body 2 is viewed in plan A grid-like support rib 19 is provided to project. And when the container main body 2 is installed on the floor surface, the lower edge part of the support rib 19 contacts the floor surface, and the container main body 2 is supported.

  As shown in FIGS. 1 and 2, the lid member 3 is rotatably connected to the upper sides of a pair of long side frame constituting portions 17 opposed to the upper frame 14. The lid member 3 of the present embodiment covers the opening of the container body 2 and extends substantially horizontally, and the upper surface of the lid member 3 is the outer surface of the long side wall portion 12 from the position supported by the upper side portion of the upper frame 14. It is comprised so that it may open | release until it will be in the position extended in parallel and arranged in the outer surface side of the long side wall part 12 so that it may oppose. The pair of lid members 3 have the same shape and are attached to the long side frame constituting portion 17 so as to face each other.

  Further, the lid member 3 is provided with a substantially trapezoidal overhanging portion 21 in a plan view that is formed so as to protrude from the open side edge on the abutting side of the pair of lid members 3 so as to extend the upper surface of the lid member 3. ing. On the other hand, on the upper surface side of the lid member 3, when the pair of lid members 3 are both closed, an accommodation recess 22 capable of accommodating the overhanging portion 21 of the other lid member 3 is formed. And a pair of lid member 3 can be made into a closed state, avoiding interference of the overhang | projection part 21, by displacing a pair of lid member 3 in an open state simultaneously in a closing direction, and a pair of lid member 3 When closed, the overhanging portion 21 of each lid member 3 is accommodated in the accommodation recess 22 of the counterpart lid member 3.

  In addition, positioning protrusions 23 that protrude upward are provided on the upper sides of the long-side frame constituting portion 17 and the short-side frame constituting portion 18 of the upper frame 14. Correspondingly, each lid member 3 is formed with a positioning opening 24 through which the positioning protrusion 23 is inserted when the lid member 3 is closed. With this configuration, the horizontal displacement of the lid member 3 in the closed state is prevented. Further, as shown in FIG. 1 and the like, the positioning protrusion 23 protrudes upward from the upper surface of the lid member 3 even when the lid member 3 is closed. And when the lid member 3 is closed, the folding containers 1 are stacked up and down (stacked), and the lower surface of the support rib 19 of the container body 2 of the upper folding container 1 is the bottom of the folding container 1. While being supported by the upper surface of the lid member 3, the outer peripheral surface of the support rib 19 of the upper folding container 1 is disposed to face the side surfaces of the plurality of positioning projections 23 of the lower folding container 1. Misalignment in the horizontal direction between the stacked folding containers 1 is prevented. Instead of the configuration in which the folding containers 1 are positioned at the time of stacking by the positioning projections 23, a slip prevention protrusion that protrudes upward from the upper surface is provided to the lid member 3, and the step is prevented by the slip prevention protrusion. You may comprise so that the folding container 1 at the time of stacking may be positioned.

  Now, in this embodiment, when the folding container 1 is folded, there is a feature in the short side wall portion 13 that is flipped up to the lower surface side of the lid member 3 in the closed state. Hereinafter, the short side wall portion 13 will be described with reference to FIGS. In addition, the short side wall part 13 of this embodiment is a left-right symmetric shape, and a pair of short side wall part 13 is the same shape.

  As shown in FIGS. 6 and 7, each short side wall 13 includes a substantially flat base wall 31 and a reinforcing rib 32 protruding outward from the outer surface of the base wall 31. Further, on the upper side portion side of the base wall portion 31, a hinge portion 33 that is rotatably connected to the short side frame constituting portion 18 of the upper frame 14 is provided. Furthermore, a handle hole 34 through which a worker can insert his / her hand is formed at the approximate center in the width direction of the base wall portion 31 and in the vicinity of the upper side portion. In addition, the handle hole 34 is closed on the inner surface side of the base wall portion 31, and a translucent attached to the position directly below the handle hole 34 so as to be inclined and displaced toward the inside of the container body 2. A handle cover 35 is provided. While the handle cover 35 allows an operator to enter a hand into the handle hole 34 from the outer surface side of the base wall portion 31 and to grasp the upper portion of the handle hole 34 of the short side wall portion 13, Thus, the articles accommodated in the folding container 1 are restricted from entering the handle hole 34 from the inner surface side of the base wall portion 31.

  As shown in FIG. 7, the reinforcing rib 32 includes a vertical rib 36 extending in the height direction (vertical direction) of the short side wall 13 and a horizontal rib extending in the horizontal width direction (left and right direction) of the short side wall 13. 37, and the plurality of vertical ribs 36 and the plurality of horizontal ribs 37 extend so as to appropriately cross each other. In addition, while the structure which protrudes from the base wall part 31, such as the reinforcement rib 32, is employ | adopted in the outer surface side of the short side wall part 13, the base wall part 31 is provided in the inner surface side of the short side wall part 13. FIG. The structure which protrudes from the inner surface of is not employ | adopted. That is, the inner surface of the short side wall portion 13 is a substantially flat surface.

  Further, in the present embodiment, four vertical ribs 36 having the same shape on the left and right sides of the outer surface of the base wall portion 31 are provided side by side at regular intervals in the left-right direction. Further, in correspondence with the range including the substantially central portion in the height direction (vertical direction) of the short side wall 13, the distance between the leading edges (outer edges) in the protruding direction from the base wall 31 of the four vertical ribs 36 is defined. A reinforcing wall portion 41 to be connected is provided. In other words, the reinforcing wall 41 that faces the outer surface of the portion including the substantially central portion in the height direction of the base wall 31 is provided, and there are four spaces between the base wall 31 and the reinforcing wall 41. Are connected by vertical ribs 36. Hereinafter, the vertical rib 36 that connects the base wall portion 31 and the reinforcing wall portion 41 is referred to as a “connecting rib 42”. In the present embodiment, the connecting rib 42 which is the vertical rib 36 constitutes a connecting portion.

  Further, each connecting rib 42 basically extends from the vicinity of the upper edge portion of the base wall portion 31 to the lower edge portion. Further, as shown in FIG. 7 to FIG. 9, each connecting rib 42 is formed from the base wall portion 31 rather than the general portion 43 in a portion including the general portion 43 and the central portion in the height direction of the short side wall portion 13. And a reinforcing projection 44 having a long projection length (projecting outward). In the present embodiment, in the height direction of the short side wall 13, the position of the central part of the formation range of the reinforcing protrusion 44 and the position of the central part of the formation range of the reinforcing wall part 41 are the same. However, the formation range of the reinforcing protrusion 44 is wider than the formation range of the reinforcing wall 41. In addition, the protrusion length gradually changes in the connecting portion of the reinforcing protrusion 44 with the general portion 43.

  Further, in the range from the boundary portion between the reinforcing protrusion 44 and the lower general portion 43 to the lower edge portion of the base wall portion 31, it faces the outer surface of the base wall portion 31 and is connected to the base wall portion 31 by the connecting rib 42. Auxiliary wall portion 46 is provided. The auxiliary wall portion 46 is formed so as to straddle the three connecting ribs 42 on the lateral side central portion side of the short side wall portion 13 among the four connecting ribs 42 in one set. However, as shown in FIG. 8, the auxiliary wall portion 46 and the base wall portion 31 are connected by two connecting ribs 42 corresponding to both sides of the auxiliary wall portion 46. The connecting rib 42 corresponding to the intermediate position in the width direction is omitted in the section where the auxiliary wall portion 46 is formed. In addition, when folding up the folding container 1 due to the presence of the auxiliary wall portion 46, when the short side wall portion 13 is flipped up, the operator presses the flat auxiliary wall portion 46 and jumps up the short side wall portion 13. Compared to a configuration in which the reinforcing rib 32 is pressed and the short side wall portion 13 must be flipped up, workability can be improved.

  Further, as shown in FIG. 5, when the folding container 1 is folded, the pair of short-side side wall portions 13 overlap with each other at a portion (auxiliary wall portion 46) below the reinforcing protrusion 44. The protrusions 44 are not in contact with each other.

  Furthermore, the reinforcing wall portion 41, the base wall portion 31, and the pair of connecting ribs 42 form a cylindrical portion that opens upward and downward (hereinafter referred to as “cylindrical portion 47”). However, in the present embodiment, as shown in FIGS. 8 and 9, an inner auxiliary wall 48 that vertically divides the inner space of the cylindrical portion 47 is provided at an intermediate position in the vertical direction of the cylindrical portion 47. . However, the inner auxiliary wall 48 is formed with a through-hole 49 penetrating vertically in the central portion, and the inner auxiliary wall 48 has a rectangular frame shape extending along the inner peripheral surface of the cylindrical portion 47. .

  Here, the formation of the tubular portion 47 will be described. As shown in FIG. 10, the inner surface side of the tubular portion 47 is formed by the upper slide die 51 and the lower slide die 52. The upper slide mold 51 and the lower slide mold 52 have substantially the same shape, but the upper slide mold 51 has a protrusion 53 for forming the through hole 49. Further, when the protrusion length of the protrusion 53 is subtracted from the upper slide mold 51, the upper slide mold 51 and the lower slide mold 52 have the same length of the portion for forming the inner surface of the cylindrical portion 47. Then, as shown in FIG. 10 (a), the mold apparatus for molding the short side wall 13 is clamped in a state where the upper slide mold 51 and the lower slide mold 52 are brought into contact with each other at the protrusion 53, and the molding is performed. By filling and solidifying the material, the short side wall 13 including the cylindrical portion 47 is integrally formed.

  Further, as shown in FIG. 10 (b), the slide molds 51, 52 are extracted from the tubular portion 47 above and below the tubular portion 47 and taken out from the outer surface side of the short side wall portion 13. Die-cutting space is secured. That is, in this embodiment, the lateral rib 37 which connects between the connection ribs 42 which adjoin each other in the boundary part of the reinforcement protrusion part 44 and the upper and lower general part 43 among the connection ribs 42 is formed, A space between the horizontal rib 37 and the cylindrical portion 47 is a die-cutting space for the slide dies 51 and 52. The distance between each horizontal rib 37 and the cylindrical portion 47 is slightly larger than the vertical width of the slide dies 51, 52, and the slide dies 51, 52 extracted from the cylindrical portion 47 have the horizontal rib 37. It comes to be close to.

  As described in detail above, according to the first embodiment, the short-side side wall portion 13 is opposed to the outer surface of the base wall portion 31 and is connected to the base wall portion 31 by the connecting rib 42. 41 is provided. For this reason, when the stress which will deform | transform the base wall part 31 with respect to the short side wall part 13 acts, the base wall part 31, the connection rib 42, and the reinforcement wall part 41 cooperate. The deformation of the base wall portion 31 can be suppressed. In particular, the reinforcing wall portion 41 is subjected to a load that is compressed in the vertical direction with respect to the short side wall portion 13 (for example, when folding containers 1 in an assembled state are stacked up and down). Are provided corresponding to the central portion in the height direction, which is a portion where a relatively large stress is easily applied. For this reason, the deformation | transformation of the short side wall part 13 when the load compressed to an up-down direction with respect to the short side wall part 13 is applied can be suppressed effectively and more reliably. Furthermore, by providing the reinforcing wall portion 41, the number of reinforcing ribs 32 (vertical ribs 36 and horizontal ribs 37) can be reduced, or the protruding length of the reinforcing rib 32 from the base wall portion 31 can be shortened as a whole. In addition, sufficient strength can be secured, and the short side wall 13 can be reduced in weight and thickness. As a result, the folding container 1 is light and compact, and it is possible to improve transportation and storage performance and save resources.

  Furthermore, since the inner surface of the short side wall 13 (base wall 31) is a substantially flat surface, for example, in the case where a recess is formed on the inner surface of the short side wall 13, the folding container It is possible to avoid a situation in which an article accommodated in 1 is damaged by being caught in the concave portion, or dust or the like is easily accumulated in the concave portion.

  In addition, in this embodiment, since the strength by the side wall parts 12 and 13 is further required, and since it is applied to a folding container that is required to be compact at the time of folding, The effect which can be enjoyed by employ | adopting a structure becomes a very big thing. Furthermore, in this embodiment, it is the structure which long side wall part 12 itself bends, and is applied to the folding container 1 for which the intensity | strength in the short side wall part 13 single-piece | unit is required still more. Also in this point, it can be said that the effect which can be enjoyed by employ | adopting the structure of this embodiment is still larger.

  Moreover, since the reinforcement wall part 41 and the base wall part 31 are connected with the vertical rib 36, the intensity | strength of the short side wall part 13 with respect to the load compressed to an up-down direction can be improved further. In addition, in this embodiment, since the reinforcing wall portion 41 and the base wall portion 31 are connected by the four vertical ribs 36, three cylindrical portions 47 are formed by these, and the short The strength of the side wall portion 13 can be dramatically improved. Further, for example, the durability of the reinforcing wall portion 41 and the connecting rib 42 itself can be improved as compared with the case where the reinforcing wall portion 41 and the base wall portion 31 are connected by a single rib.

  In addition, an inner auxiliary wall 48 provided in a frame shape along the inner peripheral surface of the cylindrical portion 47 is provided inside the cylindrical portion 47. For this reason, the deformation | transformation etc. of the cylindrical part 47 (the connection rib 42 or the reinforcement wall part 41) can be prevented more reliably, and the further strength improvement of the short side wall part 13 can be aimed at. Further, the inner auxiliary wall 48 is formed with a through hole 49, and the cylindrical portion 47 communicates with the upper and lower sides, so that it is difficult for dust and water to accumulate inside the cylindrical portion 47. Accordingly, it is possible to improve drainage after washing, improve hygiene, and the like.

  Further, the inner surface side (inner space) of the cylindrical portion 47 is formed by a pair of upper and lower slide molds 51 and 52. That is, the cylindrical part 47 opens upward and downward and communicates with the outer surface side of the short side wall part 13, so that the inner surface side of the cylindrical part 47 is formed by the two slide dies 51 and 52. be able to. Thereby, the length of the site | part for shape | molding the cylindrical part 47 among each slide type | molds 51 and 52 can be shortened as much as possible, and the improvement of the durability of the said slide type | molds 51 and 52 can be aimed at. Furthermore, the space required for the die cutting of the slide dies 51 and 52 can be shortened as much as possible. For this reason, in the case where the lateral rib 37 or the like is provided above or below the reinforcing wall portion 41, the lateral rib 37 or the like can be brought as close as possible to the reinforcing wall portion 41. Therefore, by providing the reinforcing wall portion 41, the lateral rib 37 or the like can be provided only at a position far away from the reinforcing wall portion 41 above or below the reinforcing wall portion 41. It is possible to avoid a situation in which the strength is reduced at a portion separated from the horizontal rib 37 or the like, or the reinforcing wall portion 41 needs to be formed in a wide range in order to avoid the strength reduction. .

  In addition, the upper slide mold 51 is provided with a protrusion 53 for forming a through hole 49 in the inner auxiliary wall 48. In addition, since the pair of upper and lower slide molds can be abutted vertically in the space, it is possible to prevent mutual displacement and the like during molding, and the reinforcing wall portion 41, the base wall portion 31, and the connecting rib 42. Occurrence of manufacturing errors such as wall thickness can be suppressed.

  Further, each connecting rib 42 is provided with a reinforcing projection 44 having a longer projection length than the general portion 43 from the base wall portion 31. Thus, by making the protrusion length of the reinforcing rib 32 from the base wall portion 31 relatively long, the deformation preventing effect of the base wall portion 31 by the reinforcing rib 32 (because it is provided on the vertical rib 36 in this example, The effect of preventing deformation in the direction including the vertical direction) is further exhibited. In particular, in this embodiment, the formation range of the reinforcing protrusion 44 overlaps with the formation range of the reinforcing wall 41, and the reinforcing wall 41 is connected to the base wall 31 via the reinforcing protrusion 44. It has been dressed. For this reason, combined with the effect of preventing deformation of the short side wall 13 by providing the reinforcing wall 41, the strength of the short side wall 13 can be more effectively increased.

  Further, when the protruding length of the reinforcing rib 32 becomes long, there is a concern that the strength of the reinforcing rib 32 itself may be reduced. However, in this embodiment, a reinforcing wall portion is provided at the tip of the reinforcing protruding portion 44 that has a relatively long protruding length. Since 41 is provided, such inconvenience can be suppressed and damage to the reinforcing rib 32 can be suppressed. In particular, since the base wall portion 31 and the reinforcing wall portion 41 are connected by a plurality of reinforcing ribs 32, such an effect becomes more remarkable. In addition, by reinforcing the protrusion length of the reinforcing protrusion 44 that is a part connected to the reinforcing wall 41 in the connecting rib 42, the reinforcing wall 41 and the base wall 31 are further separated from each other. The slide molds 51 and 52 for molding the inner surface of the wall portion 41 can be formed thick, and the strength of the slide molds 51 and 52 can be improved.

  In addition, in the present embodiment, the provision of the reinforcing wall portion 41 does not mean that the vertical rib 36 corresponding to the intermediate position in the horizontal width direction of the reinforcing wall portion 41 is omitted. 41 and the base wall portion 31 are connected to each other, and the vertical ribs 36 continuously extend across the reinforcing wall portion 41 in the vertical direction. Therefore, the deformation of the reinforcing wall portion 41 can be prevented more reliably, and the strength of the vertical rib 36 can be increased compared to a configuration in which the vertical rib 36 is divided above and below the reinforcing wall portion 41. Can do.

(Second Embodiment)
Hereinafter, the second embodiment will be described focusing on the characteristic part with reference to FIGS. In addition, since the basic composition of the folding container 1 is the same as that of the said 1st Embodiment, it demonstrates using the member name and member number similar to the said 1st Embodiment for convenience.

  As shown in FIGS. 11, 12, 16, and the like, also in the short side wall portion 13 of the present embodiment, the connecting ribs 42 (vertical lengths) are respectively provided on the left and right sides of the outer surface of the base wall portion 31 as in the first embodiment. Four ribs 36) are provided. However, in the present embodiment, the two protruding ribs 42 adjacent to each other in the protruding direction from the base wall 31 are connected by the reinforcing wall 41 so that two adjacent connecting ribs 42 form a set. Thus, when the short side wall 13 is viewed from the outer surface side, two ridges 61 extending vertically along the left and right sides of the outer surface of the short side wall 13 are formed. .

  Furthermore, as shown in FIGS. 15, 17, etc., in the base wall portion 31, the portion corresponding to the protrusion 61 (the portion between the pair of connecting ribs 42 connected by the reinforcing wall portion 41) A notch 63 is formed to expose the inner surface of the protrusion 61 to the inner surface of the short side wall 13. The notch 63 of this embodiment is formed over the entire length of the protrusion 61. In this embodiment, the auxiliary wall portion 46 of the first embodiment is omitted, and both the connecting rib 42 and the reinforcing wall portion 41 are extended to the vicinity of the lower edge portion of the base wall portion 31 (the lower end portion is It is connected to the lateral rib 37).

  As shown in FIGS. 16, 17, etc., the reinforcing rib 44 of the present embodiment also has a longer protruding length from the base wall portion 31 than the other general portion 43 at the intermediate position in the vertical direction. It has. Further, as shown in FIGS. 13 and 14, even when the folding container 1 is folded, the reinforcing protrusion 44 of the short side wall 13 that overlaps vertically does not come into contact with the other short side wall 13. (At least the portion where the reinforcing protrusion 44 is formed in the short side wall 13 does not overlap vertically).

  As described above in detail, according to the second embodiment, the length of protrusion from the base wall portion 31 is the portion of the connecting rib 42 that is the vertical rib 36 including the central portion in the vertical direction of the short side wall portion 13. A relatively long reinforcing protrusion 44 is provided. For this reason, the deformation | transformation of the short side wall part 13 when the load which is compressed to an up-down direction with respect to the short side wall part 13 is added can be suppressed effectively and more reliably. Further, when the reinforcing wall portion 41 is provided and the stress that causes the base wall portion 31 to deform is applied to the short side wall portion 13, the base wall portion 31 and the connecting rib 42 (reinforcing wall) are provided. The portion 41) and the reinforcing wall portion 41 can cooperate to suppress deformation of the base wall portion 31. Furthermore, by providing the reinforcing wall portion 41, sufficient strength can be ensured even if the number of the reinforcing ribs 32 is reduced or the length of the reinforcing rib 32 protruding from the base wall portion 31 is shortened as a whole. It is possible to reduce the weight and thickness of the short side wall 13. As a result, the folding container 1 is light and compact, and it is possible to improve transportation and storage performance and save resources.

  Further, by providing the reinforcing wall portion 41 at the tip of the reinforcing rib 32, the strength of the reinforcing rib 32 can be improved, and damage to the reinforcing rib 32 can be suppressed. In particular, since the reinforcing wall portion 41 and the base wall portion 31 are connected by the two connecting ribs 42, the strength of the short side wall portion 13 is dramatically improved, and the connecting rib 42 and the reinforcing wall portion 41 are improved. The durability of itself can be improved.

  In addition, even if the short side wall portions 13 are stacked one above the other, the portions where the reinforcing protrusions 44 are formed do not overlap each other, so that damage to the reinforcing protrusions 44 can be suppressed and a pair of stacked layers. The overall height of the short side wall 13 can be suppressed. Therefore, the folding container 1 in the folded state can be made more compact.

(Third embodiment)
Hereinafter, the third embodiment will be described with reference to FIGS. In addition, since the basic composition of the folding container 1 is the same as that of the said 2nd Embodiment, it demonstrates using the member name and member number similar to the said 1st, 2nd embodiment for convenience.

  As shown in FIG. 18, the folding container 1 of the third embodiment has two protruding portions 61 extending vertically along the left and right side portions of the outer surface of the short side wall portion 13, as in the second embodiment. Each line is formed. Moreover, in the folding container 1 of this embodiment, the outer rib 71 which connects between the adjacent protrusion 61 or between the protrusion 61 and the vertical rib 36 adjacent to this is formed. The outer ribs 71 are so-called lateral ribs 37, and in this example, a plurality of outer ribs 71 are provided at a predetermined distance in the height direction of the short side wall 13, but at least correspond to the reinforcing protrusions 44. One should just be provided in the position.

  Further, inside the protrusion 61 (also in this example, as in the second embodiment, a notch 63 is formed over the entire length of the protrusion 61), between the pair of connecting ribs 42. The inner rib 73 which connects is formed. The inner rib 73 and the outer rib 71 are provided at positions corresponding to each other in the height direction of the short side wall portion 13.

  Further, in the folding container 1 of the present embodiment, the bottom wall portion 11 has a substantially square plate shape (the upper frame 14 has a substantially square frame shape). For this reason, as shown in FIGS. 19 and 20, when the folding container 1 is folded, the pair of short-side side wall portions 13 overlaps not only the lower part but also substantially vertically. In addition, each short side wall portion 13 has a symmetrical shape, and the pair of short side wall portions 13 have the same shape. Therefore, in the folded state of the folding container 1, the protrusion 61 of the short side wall 13 overlapping the upper side and the protrusion 61 of the short side wall 13 overlapping the upper side overlap each other.

  On the other hand, the protrusion 61 of the present embodiment has a substantially tapered cross section. That is, the pair of connecting ribs 42 constituting the ridge portion 61 extends slightly inclined so as to be close to each other toward the front end side in the protruding direction from the base wall portion 31. Furthermore, in the folded state of the folding container 1, the protruding lengths from the bottom surfaces of the outer rib 71 and the inner rib 73 are relatively short corresponding to the portion where the protruding portion 61 of the short side wall 13 can overlap vertically. It is configured.

  Then, as shown in FIG. 20, when the folding container 1 is folded, the protrusion 61 of the short side wall 13 that overlaps the upper side passes through the notch 63 of the short side wall 13 that overlaps the lower side. Thus, it enters the inside of the protrusion 61.

  As described in detail above, according to the third embodiment, by providing the ridge portion 61 including the reinforcing protrusion 44, the deformation of the short side wall portion 13 can be more reliably performed as in the second embodiment. Can be prevented. Furthermore, by providing the outer rib 71 which connects between the adjacent protrusion parts 61, and the inner rib 73 provided inside the protrusion part 61, the protrusion part 61 and the short side wall part 13 are short side walls. It is possible to more reliably prevent a situation in which the portion 13 is deformed so as to expand and contract in the lateral width direction. Therefore, deformation of the ridge portion 61 can be prevented, and as a result, the short side wall portion 13 can be further strengthened. Moreover, in this embodiment, when the folding container 1 is folded, most of the short side wall portions 13 overlap vertically, but the protrusion 61 of the short side wall portion 13 that overlaps the upper side is formed. The inner side of the protrusion 61 is entered through the notch 63 of the short side wall 13 that overlaps the lower side. For this reason, it is possible to suppress the height of the two stacked short side wall portions 13 and to further reduce the size of the folding container 1 in the folded state.

  Further, the ridge 61 of the short side wall 13 that overlaps the upper side of the pair of short side walls 13 is the upper ridge of the short side wall 13 that overlaps the lower side. The folding container 1 can be folded relatively compactly as it enters the inside of the portion 61. Therefore, the workability at the time of folding can be improved. Furthermore, in the case where the order in which the pair of short side wall portions 13 is flipped up is set, a situation in which an assembly error of the short side wall portion 13 at the time of manufacturing the folding container 1 occurs is avoided. Can do. Therefore, it is possible to improve the assembly workability.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

  (A) In the above embodiment, the container body 2 is embodied in the foldable folding container 1, but it is applied to a box-type container having a container body that cannot be folded (the container body is integrally molded). It is also possible. In the above embodiment, the container body 2 is a foldable container that includes the upper frame 14 and in which the middle position in the vertical direction of the long side wall portion 12 is bent inward, but is another foldable container. (For example, there is no upper frame 14, the long side wall 12 is not bent at the middle in the vertical direction, and the long side wall 12 and the short side wall 13 are rotated with respect to the bottom wall 11. A foldable container that can be connected and folded over the bottom wall 11 may be employed.

  Furthermore, in the said embodiment, although the cover member 3 is embodied with the container connected with respect to the container main body 2 so that rotation is possible, another type of cover member 3, for example, a removable cover member is provided. You may apply to a container and may apply to a container without a cover member. In addition, in the said embodiment, although it was the structure by which the reinforcement wall part 41 and the reinforcement protrusion part 44 were provided with respect to a pair of short side wall part 13, the object by which the reinforcement wall part 41 and the reinforcement protrusion part 44 are provided The side wall portion is not particularly limited, and can be appropriately set for each applied container. For example, it is good also as providing in one long side side wall part 12 and one short side wall part 13. Even when such a configuration is adopted, it is desirable that the portions where the reinforcing protrusions 44 are formed do not overlap each other in the folded state of the folding container 1.

  (B) In the first embodiment, the tubular portion 47 is formed to open upward and downward, but either one or both may be closed. Further, the length of the cylindrical portion 47 is not particularly limited, and can be set as appropriate. For example, as shown in FIG. 21 to FIG. 23, the inner surface side of the cylindrical portion 47 is formed by gas injection molding or the like so that the protruding portion 61 of the second embodiment is closed. It may be configured (so that a sealed or almost sealed space is formed). In this case, since the notch 63 (concave portion) is not formed in the portion corresponding to the protrusion 61 in the base wall portion 31, the inner surface can be formed more flatly, and the article accommodated in the container body 2 And the like are capable of being transported more safely. In addition, by opening the cylindrical part 47, simplification of a mold apparatus, cost reduction, etc. can be aimed at.

  (C) In the above embodiment, the reinforcing rib 32 protrudes outward from the outer surface of the base wall portion 31 and the reinforcing wall portion 41 faces the outer surface of the base wall portion 31. The reinforcing wall portion 41 may be configured to protrude inward from the inner surface of the base wall portion and to face the inner surface of the base wall portion 31. Moreover, in the said embodiment, although the reinforcement wall part 41 is provided in the short side wall part 13, you may abbreviate | omit the reinforcement wall part 41, as shown in FIG. However, in this case, the number of reinforcing ribs 32 increases or the protruding length of the reinforcing ribs 32 becomes relatively long to compensate for the strength that is reduced by omitting the reinforcing wall portion 41, and the weight increases. It is desirable to provide the reinforcing wall 41 as much as possible.

  (D) In the first embodiment, the forming section of the reinforcing wall portion 41 in the vertical direction and the forming section of the reinforcing protruding portion 44 may be made to coincide with each other, and the portion excluding the gradually changing section of the reinforcing protruding portion 44. You may comprise so that the formation area of and the formation area of the reinforcement wall part 41 may correspond. When these structures are employed, it is possible to avoid a situation in which the leading edge of the reinforcing protrusion 44 is exposed, and it is possible to prevent a situation in which the leading edge of the reinforcing protrusion 44 is damaged. Incidentally, in the said 2nd, 3rd embodiment, since the reinforcement wall part 41 is provided over the up-down direction whole region of the connection rib 42, damage to the connection rib 42 can be prevented more reliably.

  In the above-described embodiment, the reinforcing wall portion 41 is connected to the leading edge of the connecting rib 42. For example, the reinforcing wall portion 41 is connected at a position slightly closer to the base wall portion 31 than the leading edge of the connecting rib 42. It is also possible to configure as described above. However, from the viewpoint of protecting the leading edge of the connecting rib 42 and preventing the slide molds 51 and 52 from becoming thin, it is desirable that the reinforcing wall 41 is provided at the leading edge of the connecting rib 42.

  (E) The cross-sectional shape of the cylindrical portion 47 in the first embodiment is not particularly limited. For example, the outer surface of the base wall portion 31 and the inner surface of the reinforcing wall portion 41 that face each other do not necessarily extend in parallel. Furthermore, in the said 1st Embodiment, although the reinforcement wall part 41 and the base wall part 31 are connected by the four reinforcement ribs 32, it is not specifically limited to the said structure, For example, 3 or less ( It may be connected by five or more reinforcing ribs 32, and the reinforcing wall portion 41 and the base wall portion 31 are arranged in the left-right direction (the lateral width direction of the short side wall portion 13). It is good also as connecting with the extending lateral rib.

  Moreover, in the said 1st Embodiment, although all the four connection ribs 42 straddled the reinforcement rib 32 up and down continuously also about the position in which the reinforcement wall part 41 was provided, For example, the connecting rib 42 corresponding to the intermediate position in the lateral width direction may be omitted as appropriate. However, in order to effectively utilize the entire reinforcing wall 41 as a measure for preventing deformation of the short side wall 13, it is desirable to provide connection ribs 42 connected to both sides of the reinforcing wall 41, Furthermore, it is desirable to provide the connecting rib 42 corresponding to the intermediate position in the lateral width direction of the reinforcing wall portion 41 without being omitted. In addition, you may comprise so that the cylindrical part 47 of 1st Embodiment can be utilized as an accessory case (for example, a driver etc. can be inserted and latched).

  (F) The cross-sectional shape of the protrusion 61 in the second and third embodiments is not particularly limited. For example, a wall portion having an extension angle different from that of the connecting rib 42 such as the reinforcing wall portion 41 is omitted, and the cross-section is such that the pair of connecting ribs 42 project obliquely so as to be close to each other and are directly connected. You may comprise in a triangular shape. In this case, the strength of the protrusion 61 can be relatively increased without providing the inner rib 73 and the outer rib 71 (of course, the inner rib 73 and the outer rib 71 are stronger), and the third embodiment described above. When the short side wall portions 13 are vertically stacked as in the form, the ridge portion 61 of the upper short side wall portion 13 is placed inside the ridge portion 61 of the lower short side wall portion 13. It can also be entered.

  Moreover, in the said 2nd, 3rd embodiment, the notch part 63 does not need to be formed over the longitudinal direction whole region of the protrusion part 61, and when the folding container 1 is folded at least, the short side side which overlaps an upper side What is necessary is just to be formed in the site | part which can overlap with the protrusion part 61 of the side wall part 13. FIG.

  (G) In the said embodiment, although the folding container 1 is comprised by the polypropylene, it is good also as comprising by other resin materials, such as polyethylene, PET, and polyamide.

  DESCRIPTION OF SYMBOLS 1 ... Folding container, 2 ... Container main body, 3 ... Cover member, 11 ... Bottom wall part, 12 ... Long side wall part, 13 ... Short side wall part, 14 ... Upper frame, 31 ... Base wall part, 32 ... Reinforcing ribs 36 ... Vertical ribs 41 ... Reinforcing wall portions 42 ... Connecting ribs 43 ... General portions 44 ... Reinforcing protrusions 47 ... Tubular portions 48 ... Inner auxiliary walls 51 ... Upper slide type 52 ... Lower Slide mold, 61 ... ridge, 63 ... notch, 71 ... outer rib, 73 ... inner rib.

Claims (3)

In a box-shaped container comprising a substantially rectangular plate-like bottom wall portion and side wall portions extending upward from each side portion of the bottom wall portion,
At least one of the side wall portions includes a base wall portion and vertical ribs protruding from the outer surface or the inner surface of the base wall portion and extending in the height direction of the side wall portion,
The vertical rib includes a reinforcing protrusion that is formed so that a protrusion length from the base wall portion is longer than that of the other general portion in a portion including a central portion in the height direction of the base wall portion. Box-type container to play.   2. The box shape according to claim 1, wherein a reinforcing wall portion is provided so as to extend from at least a part of the reinforcing protrusion of the vertical rib so as to face the outer surface of the base wall portion. container. The side wall is configured to be rotatable relative to the bottom wall, and in a box-type container that can be folded so that the side walls overlap each other,
The reinforcing protrusions are formed on at least two of the side wall portions, and portions of the base wall portion corresponding to the reinforcing protrusion portions formed on the side wall portions do not come into contact with each other. The box-shaped container according to claim 2.

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