JP4684769B2 - Folding container - Google Patents

Description

  The present invention comprises a bottom, one opposing side wall hinged to one opposite bank portion of the bottom, and another opposite side wall hinged to the other opposite bank portion of the bottom. The folding container that can be folded from the state assembled in a box shape by tilting one opposite side wall in the bottom direction and then tilting the other side wall in the same direction toward the bottom. It is about.

  Conventionally, from the state assembled in a box shape, engaging portions are formed by extending the side walls at both end portions of the side walls that are first tilted in the bottom direction. Engagement protrusions are provided, and engaging portions that are substantially perpendicular to the side walls are formed at both ends of the side walls that are tilted in the bottom direction later. An appropriate number of fitting holes are formed, and a locking elastic piece having a locking projection at the tip is formed on the side wall that is tilted in the bottom direction later.

  In the state assembled in the box shape, the engaging portion formed on the side wall that is tilted in the bottom direction first is opposed to the engaging portion formed on the side wall that is tilted in the bottom direction from the rear. In addition, the fitting protrusion formed on the engaging portion formed on the side wall that is tilted in the bottom direction first is fitted in the engaging portion formed on the side wall that is tilted in the bottom direction later. The engaging portion formed on the side wall that is inserted into the joint hole and is tilted in the bottom direction first hits the locking protrusion of the locking elastic piece formed on the side wall that is tilted in the bottom direction later. The side wall that comes into contact and is first tilted in the bottom direction is configured not to tilt in the bottom direction.

  A folding container having the above-described configuration is disclosed in Patent Document 1 as an example.

JP 2002-240823 A

  When the folding container is assembled in a box shape, as described above, the fitting protrusion protruding from the engaging portion formed on the side wall that is tilted in the bottom direction first falls down in the bottom direction later. It is configured to be inserted into the fitting hole drilled in the engaging portion formed on the side wall, but since the fitting amount between the fitting protrusion and the fitting hole is small, the folding container is twisted When a load such as this is applied, there is a problem that the fitting between the fitting protrusion and the fitting hole is released.

  While increasing the length of the fitting protrusion and deepening the fitting hole, the amount of fitting between the fitting protrusion and the fitting hole can be increased, but the length of the fitting protrusion is reduced. Increasing the length and depth of the fitting hole increases the thickness of the side wall, thus increasing the weight of the folding container, reducing the internal dimensions of the folding container, and reducing the internal volume of the folding container. is there.

  An object of the present invention is to solve the problems of the above-described conventional folding container.

In order to achieve the above-mentioned object, the present invention is hinged to the bottom, one opposing side wall hinged to the opposite bank of the bottom, and the other opposite bank of the bottom. It is composed of the other opposite side wall, and is assembled into a box shape from the folded state by raising the opposite one side wall substantially vertically and then raising the other opposite side wall substantially vertical. In a folding container capable of being engaged, an engagement portion extending in a substantially right-angle direction is formed on a side wall that is first set up substantially vertically from the folded state with respect to a plate-like portion of the side wall. The inner surface of the plate portion of the engaging portion is substantially composed of opposed horizontal ridges formed at predetermined intervals in the vertical direction and vertical ridges connecting the ends of the opposed horizontal ridges. A U-shaped ridge is formed. By forming such a substantially U-shaped ridge, the engagement portion includes an inner surface of the plate-like portion of the side wall, the substantially U-shaped ridge, and the engagement portion. A fitting through-hole surrounded by the inner surface of the plate portion is formed, and a fitting block is protruded from the substantially U-shaped protruding portion, and is also erected from the rear. An engaging portion is formed on the side wall by extending the plate-like portion of the side wall beyond the end vertical rib, and the engaging portion includes a fitting protrusion and an end of the side wall. When the folding container is assembled into a box shape, a vertical rib, a plate portion of the engaging portion, and a concave portion surrounded by opposing horizontal connecting ribs connected to the fitting protrusion are formed. Is formed in the recessed portion formed in the engaging portion of the side wall standing from the rear, and in the engaging portion of the side wall standing up first. The fitting block is fitted, and the fitting protrusion formed on the engaging portion of the side wall standing from the rear is formed into the fitting see-through formed on the engaging portion of the side wall standing first. It is configured to be fitted into the hole .

  A fitting through hole and a fitting block are formed in the engaging portion provided on the side wall that is first set up in a substantially vertical state from the folded state, and is provided on the side wall that is set up substantially in the vertical direction later. Since the fitting projection formed into the fitting through hole and the concave portion into which the fitting block can be fitted are formed in the engaged portion, the folding container is assembled in a box shape. When a load such as a twist is applied, it is possible to reliably prevent the engagement state between the engagement portion of the side wall that is initially set substantially vertically and the engagement frame of the side wall that is set to be substantially vertical later is released. In addition, the rigidity of the folded container assembled in a box shape can be increased.

  Hereinafter, examples of the present invention will be described. However, the present invention is not limited to these examples as long as the gist of the present invention is not exceeded.

  First, the overall configuration of the folding container of the present invention will be described with reference to FIGS.

  Reference numeral 1 denotes a bottom portion having a substantially rectangular planar shape, and the bottom portion 1 is formed on a bank portion 1a formed on the opposite long side (hereinafter, referred to as a long side bank portion) 1a and on the opposite short side. In this embodiment, the height of the long side bank portion 1a is lower than the height of the short side bank portion 1b. Is formed. A long side wall 2 is hingedly connected to the long side bank portion 1a of the bottom portion 1 via an appropriate hinge member, and an appropriate hinge member is similarly connected to the short side side bank portion 1b of the bottom portion 1. The short side wall 3 is hingedly connected.

  As shown in FIG. 1, from the state assembled in a box shape, first, as shown in FIG. 2, the long side wall 2 is brought down so as to overlap the bottom portion 1, and then the short side wall 3. 3 is configured so that it can be folded into a compact and low height as shown in FIG. 3 by being tilted so as to overlap the long side wall 2 that has been tilted so as to overlap the bottom 1 first. . Also, as shown in FIG. 3, from the folded state, first, as shown in FIG. 2, the short side wall 3 is set up substantially vertically, and then the long side wall 2 is set up substantially vertical. By standing, as shown in FIG. 1, it can be assembled into a box shape.

  As shown in FIGS. 1, 4 to 6, etc., the long side wall 2 has a horizontally long plate-like portion 2 a having a substantially rectangular shape, and a substantially horizontal upper end side of the plate-like portion 2 a The upper end horizontal rib 2b perpendicular to the outer surface 2a1 of the outer surface of the plate-like portion 2a (the surface located outside when the fold is assembled in a box shape) is formed, and the substantially horizontal of the plate-like portion 2a is formed. Similarly, lower end horizontal ribs 2c perpendicular to the outer surface 2a1 of the plate-like portion 2a are formed on the lower end sides, and further, left and right end sides substantially perpendicular to the plate-like portion 2a are provided with upper end horizontal ribs 2b. While connecting both ends and both ends of the lower end horizontal rib 2c, an end vertical rib 2d perpendicular to the outer surface 2a1 of the plate-like portion 2a is formed.

  The long side wall 2 is formed with a vertically long belt-like plate portion 4 by extending the plate-like portion 2 a beyond the end vertical rib 2 d, and in the upper region of the vertically long belt-like plate portion 4. The upper region of the belt-like plate portion 4, the end vertical rib 2d, the horizontal short rib 2e perpendicular to the end vertical rib 2d and the same height as the end vertical rib 2d, and the upper end horizontal rib An engaging portion 5 is formed which includes a horizontal bank portion 5a having a substantially flat top surface 2b and a vertical bank portion 5b substantially parallel to the end vertical rib 2d. The horizontal bank portion 5a and the vertical bank portion 5b are formed. The height from the belt-like plate portion 4 is lower than the end vertical ribs 2d and the horizontal short ribs 2e.

  An appropriate number of fitting protrusions 5 c are formed on the engaging portion 5 described above. In this embodiment, the fitting protrusion 5 c is substantially the same as the vertical bank portion 5 b with respect to the belt-like plate portion 4. It is formed by an outer vertical plate 5c1 formed by extending vertically and opposing horizontal plates 5c2 formed at the upper and lower ends of the outer vertical wall 5c1. Further, between the end vertical rib 2d and the vertical bank portion 5b, opposite horizontal connection ribs 5d having substantially the same height as the vertical bank portion 5b are bridged. It is connected to the plate 5c2. With this configuration, the engaging portion 5 is formed with a recess 5e surrounded by the strip-shaped plate portion 4, the end vertical rib 2d, and the horizontal connecting rib 5d facing the vertical bank portion 5b. .

  In addition, horizontal ribs 2f and vertical ribs 2g are appropriately formed on the outer surface 2a1 of the plate-like portion 2a of the long side wall 2 as necessary.

  As shown in FIG. 2 and FIG. 7 and the like, the short side wall 3 has a horizontally long plate-like portion 3a having a substantially rectangular shape, and a plate-like shape is formed on a substantially horizontal upper end side of the plate-like portion 3a. An upper horizontal rib 3b perpendicular to the outer surface 3a1 of the outer surface of the portion 3a (the surface located outside when the fold is assembled in a box shape) is formed, and on the substantially horizontal lower edge of the plate-like portion 3a Similarly, lower end horizontal ribs 3c perpendicular to the outer surface 3a1 of the plate-like part 3a are formed, and further, both ends and lower ends of the upper-end horizontal ribs 3b are provided on the left and right edges substantially perpendicular to the plate-like part 3a. Both ends of the horizontal rib 3c are connected, and an end vertical rib 3d perpendicular to the outer surface 3a1 of the plate-like portion 3a is formed.

  At both ends of the short side wall 3, there is a vertically long plate portion 6a extending in a substantially right angle direction with respect to the inner surface 3a2 of the plate-like portion 3a (the surface located inside when folding is assembled into a box shape). The upper end horizontal rib 3b and the horizontal bank portion 6b whose upper surface is substantially flush with each other are formed on the inner surface 6a1 of the plate portion 6a (the surface located on the inner side when the folding is assembled into a box shape). ing. Further, on the inner surface 6a1 of the plate portion 6a, there are opposed horizontal ridges 6c1 formed at predetermined intervals in the vertical direction, and the ends of the opposed horizontal ridges 6c1 that are located on the front end side of the plate portion 6a. A substantially U-shaped ridge portion 6c comprising a vertical ridge 6c2 connecting the portions is formed, and such an approximately U-shaped ridge portion 6c is formed on the inner surface 6a1 of the plate portion 6a. Thus, a fitting through hole or a fitting through hole 6d surrounded by the inner surface 3a2 of the plate-like portion 3a of the short side wall 3, the substantially U-shaped protrusion 6c and the inner surface 6a1 of the plate portion 6a is formed. Has been. The fitting through hole 6d surrounded by the inner surface 3a2 of the plate-like portion 3a of the short side wall 3, the substantially U-shaped protrusion 6c and the inner surface 6a1 of the plate portion 6a is formed on the long side wall 2 described above. A predetermined number is formed in the vertical direction corresponding to the fitting protrusions 5 c formed in the engaging portion 5. In the present embodiment, since two engagement protrusions 5c are formed on the engagement portion 5 of the long side wall 2, two engagement through holes 6d are also formed.

  The upper end corners of the short side wall 3 are substantially perpendicular to the inner surface 3a2 of the plate-like portion 3a by the plate portion 6a, the horizontal bank portion 6b and the substantially U-shaped protrusion 6c as described above. An engaging portion 6 is formed. The height of the engaging portion 6 formed on the short side wall 3, that is, the height from the upper surface of the horizontal bank portion 6b to the lower surface of the vertically long plate portion 6a, and the height of the engaging portion 5 formed on the long side wall 2 That is, the height from the upper surface of the horizontal bank portion 5a to the upper surface of the horizontal short rib 2e is formed to be substantially the same height. Further, a fitting block 6e is projected from the substantially central portion of the vertical bank portion 6c2 of the substantially U-shaped bank portion 6c constituting the engaging portion 6 formed on the short side wall 3.

  A U-shape comprising a pair of horizontal grooves 7a parallel to each other and a vertical groove 7b connecting the distal ends of the horizontal grooves 7a on the side of the engaging portion 6 on the plate-like portion 3a of the short side wall 3 located in the vicinity of the engaging portion 6. By forming the slit 7, an elastic tongue piece 8 having a free end on the engaging portion 6 side is formed, and the distal end portion of the elastic tongue piece 8 is formed from the inner surface 3a2 of the plate-like portion 3a. A locking protrusion 8a is formed so as to protrude. The locking projection 8a is formed with an inclined surface 8a1 that becomes higher toward the tip of the elastic tongue piece 8, and the tip surface 8a2 facing the engagement frame 6 of the locking projection 8a is flat. It is formed as a substantially vertical plane.

  Reference numeral 9 denotes a vertically long step portion formed on the inner surface 3a2 of the plate-like portion 3a of the short side wall 3 located on the engagement frame 6 side as required. The step portion 9 is short in the height direction. A predetermined length extends from the upper end of the side wall 3 to the bottom portion, and in the width direction, the vertical groove 7b of the U-shaped slit 7 formed in the plate-like portion 3a from the engaging portion 6. Further, the thickness of the step portion 9 (distance from the inner surface 3a2 of the plate-like portion 3a of the short side wall 3) W1 is a flat surface substantially parallel to the inner surface 3a2 of the short side wall 3 of the step portion 9. In other words, the front end surface 8a2 of the locking projection 8a formed on the elastic tongue 8 is such that the surface 9a does not exceed the front end surface 8a2 of the locking projection 8a formed on the elastic tongue 8. It is configured to protrude beyond the step 9. When such a step portion 9 is formed on the short side wall 3, the width of the long side wall 2 (the distance between the vertical bank portions 5b of the engaging portion 5 formed on the long side wall 2) W2 is Thus, the distance between the flat surfaces 9a of the opposing step portions 9 formed is substantially the same.

  As shown in FIG. 3, in order to assemble from a folded state into a box shape as shown in FIG. 1, first, as shown in FIG. When the short side wall 3 of the long side wall 2 is raised substantially vertically and then the long side wall 2 is rotated in the direction of the short side wall 3 erected substantially vertically, the fitting protrusion formed on the engaging portion 5 of the long side wall 2 A vertical bank portion 5b of the engaging portion 5 of the long side wall 2 is formed on the short side wall 3 before and after fitting into the fitting through hole 6d formed in the engaging frame 6 of the short side wall 3 of 5c. The elastic tongue piece 8 is brought into contact with the inclined surface 8a1 of the locking projection 8a, and the elastic tongue piece 8 is deformed outward. Then, when the engaging portion 5 of the long side wall 2 passes through the locking protrusion 8a of the elastic tongue piece 8 formed on the short side wall 3, the elasticity pushed outward by the engaging portion 5 of the long side wall 2 The tongue piece 8 returns due to its restoring force, and as shown in FIG. 8, the distal end surface 8a2 of the locking projection 8a of the elastic tongue piece 8 is the inner surface of the engaging portion 5 of the long side wall 2 (folding container). When the fold is assembled into a box shape, it is positioned in contact with or close to the inner surface (5 ′), and therefore, the rotation of the long side wall 2 in the direction of the bottom 1 is prevented. It will be.

  Further, when the folding container is assembled in a box shape, the engagement of the short side wall 3 with the concave portion 5e formed in the engagement portion 5 of the long side wall 2 as shown in FIGS. The fitting block 6e projected from the vertical ridge 6c2 of the substantially U-shaped ridge 6c constituting the portion 6 is configured to be fitted. Therefore, when the folding container is assembled into a box shape, the fitting protrusion 5c formed in the engaging portion 5 of the long side wall 2 is fitted into the fitting through hole formed in the engaging frame 6 of the short side wall 3. A vertical ridge of a substantially U-shaped ridge 6c constituting the engagement portion 6 of the short side wall 3 in a recess 5e formed in the engagement portion 5 of the long side wall 2 while being fitted into the hole 6d. The fitting block 6e protruding from 6c2 is fitted.

  As described above, when the folding container is assembled in a box shape, the fitting protrusion 5c formed in the engaging portion 5 of the long side wall 2 is formed in the engaging frame 6 of the short side wall 3. A fitting block 6e that is fitted in the fitting through hole 6d and that protrudes from the vertical protrusion 6c2 of the substantially U-shaped protrusion 6c that constitutes the engaging part 6 of the short side wall 3 is long. Since it is fitted into the recess 5 e formed in the engaging portion 5 of the side wall 2, the fitting protrusion 5 c formed in the engaging portion 5 of the long side wall 2 is connected to the engaging frame 6 of the short side wall 3. Compared with the case where it is fitted to the fitting through-hole 6d formed in the box, when the load such as a twist is applied to the folding container assembled in a box shape, the engaging portion of the long side wall 2 5 can be reliably prevented from being disengaged from the engagement frame 6 of the short side wall 3 and folded in a state assembled in a box shape. It is possible to increase the rigidity of the container.

  In addition, a step portion 9 having a thickness W1 is formed on the inner surface 3a1 of the short side wall 3, and the width W2 of the long side wall 2 is equal to the distance between the flat surfaces 9a of the corresponding step portions 9 formed on the short side wall 3. Since they are formed substantially the same, as shown in FIG. 2, the distance W3 between the inner surfaces 3a2 of the plate-like portions 3b of the short side wall 3 standing substantially vertically is greater than the width W2 of the long side wall 2. This is longer by twice the thickness W1 of the step 9. By configuring in this way, in the assembly operation of the folding container, the short side wall 3 in a state of being tilted substantially horizontally is erected substantially vertically as shown in FIG. 2 and then tilted substantially horizontally. When rotating the long side wall 2 in the vertical state in the vertical direction, until the engaging portion 5 of the long side wall 2 approaches the engaging portion 6 of the short side wall 3 to some extent, the engaging portion of the long side wall 2 5 does not come into contact with the plate-like portion 3a of the short side wall 3, so that the long side wall 2 can be smoothly rotated in the vertical direction, and therefore the workability of the assembly operation of the folding container can be improved. Will improve.

  In order to fold the folded container assembled in a box shape, first, the elastic tongue piece 8 of the short side wall 3 is moved so that the locking projection 8 a is disengaged from the engaging portion 5 of the long side wall 2. Then, by pushing outward, and then rotating the long side wall 2 in the direction of the bottom 1, the fitting protrusion 5 c formed on the engaging portion 5 of the long side wall 2 is formed on the engaging frame 6 of the short side wall 3. The fitting block 6e protruding from the vertical protrusion 6c2 of the substantially U-shaped protrusion 6c constituting the engaging part 6 of the short side wall 3 is discharged from the fitting through hole 6d. It discharges | emits from the recessed part 5e formed in the engaging part 5 of the side wall 2, and falls down the long side wall 2 so that it may overlap with the bottom part 1. FIG. Thereafter, the folding container assembled in a box shape is folded by tilting the substantially vertical short side wall 3 toward the bottom 1.

  In the embodiment described above, the long side wall 2 hinged to the long side bank portion 1a of the bottom portion 1 is first tilted in the direction of the bottom portion 1 from the state assembled in the box shape, and then the long side side By folding the short side wall 3 hinged to the short side bank portion 1b of the bottom portion 1b, which is higher than the bank portion 1a, toward the bottom portion 1, the folding container assembled in a box shape is folded. Although an example is shown, the short side wall 3 is removed from the state assembled in a box shape by configuring the height of the long side bank portion 1a of the bottom 1 higher than the height of the short side bank portion 1b. First, the folding container assembled in a box shape can be folded by tilting toward the bottom 1 and then tilting the long side wall 2 toward the bottom 1. In this case, the long side wall 2 is provided with the elastic tongue piece 8 and the engaging portion 6 formed on the short side wall 3 of the above-described embodiment, and the short side wall 3 is provided with the long side wall of the above-described embodiment. 2 is provided.

FIG. 1 is a perspective view of the folding container of the present invention in a state of being assembled into a box shape. FIG. 2 is a perspective view of the folding container of the present invention during assembly or folding. FIG. 3 is a perspective view of the folding container of the present invention in a folded state. FIG. 4 is a partially enlarged perspective view of the upper corner of the long side wall of the folding container of the present invention. FIG. 5 is a partially enlarged perspective view of the upper corner portion of the long side wall of the folding container of the present invention. FIG. 6 is also a partially enlarged perspective view of the upper corner portion of the long side wall of the folding container of the present invention. FIG. 7 is a partially enlarged perspective view of the upper corner portion of the short side wall of the folding container of the present invention. FIG. 8 is a partially enlarged perspective view of the upper side corners of the long side wall and the short side wall in a state where the folding container of the present invention is assembled in a box shape. FIG. 9 is a partial vertical cross-sectional view of the upper side corners of the long side wall and the short side wall in a state where the folding container of the present invention is assembled in a box shape.

Explanation of symbols

1 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Bottom 1a ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Long side bank 1b ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・・ ・ Short side bank part 2 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Long side wall 3 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Short side wall 5 ・ ・ ・ ・ ・ ・···········································. ······································ 6g · · · · · · · · · · · fitting through hole 6e Mating block

Claims (1)

A bottom portion, one side wall hinged to the opposite bank portion of the bottom portion, and another side wall hinged to the other opposite bank portion of the bottom portion, From a folded state in a folded container that can be assembled into a box shape by standing one opposing side wall substantially vertically from the folded state and then standing the other opposite side wall substantially vertically. First, the side wall that is set up substantially vertically is formed with an engaging portion that extends in a direction substantially perpendicular to the plate-like portion of the side wall, and on the inner surface of the plate portion of the engaging portion, A substantially U-shaped ridge is formed, which is composed of opposed horizontal ridges formed at predetermined intervals in the vertical direction and vertical ridges connecting the ends of the opposed horizontal ridges. , To form such a substantially U-shaped protrusion As a result, a fitting through hole surrounded by the inner surface of the plate-like portion of the side wall, the substantially U-shaped protrusion and the inner surface of the plate portion of the engaging portion is formed in the engaging portion. In addition, a fitting block protrudes from the substantially U-shaped protruding portion, and a plate-like portion of the side wall is formed on the side wall standing from the rear, and an end vertical rib is provided. The engagement portion is formed by extending beyond the engagement portion. The engagement portion includes a fitting protrusion, a vertical rib at the end of the side wall, a plate portion of the engagement portion, and the fitting protrusion. A concave portion surrounded by opposing horizontal connecting ribs connected to the portion is formed, and when the folding container is assembled in a box shape, it is formed in the engaging portion of the side wall that is raised from the rear. The recess is fitted with the fitting block formed on the engaging portion of the side wall that is first raised. The fitting projection formed on the engaging portion of the side wall that is erected from and that is configured to be fitted into the fitting hole formed in the engagement portion of the side wall that is erected on the first Folding container characterized by.

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