JP2007217002A - Folding container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a folding container capable of performing a stable and smooth pulling-up of folded side walls. <P>SOLUTION: In accordance with a folding container 10 of this invention, since a handle 40 is arranged at a turning center rather than the center of gravity of a second side wall 21, a mere pulling up the handle 40 of the folded second side wall 21 causes the turning center side in the second side wall 21 to move upward in advance to the turning extremity end. Then, the second side wall 21 can turn toward its raised attitude with the turning center of the second side wall 21 positioned at the upper end of a side wall supporting protrusion 32. With this arrangement, an engagement between the second side wall 21 and the side wall supporting protrusion 32 that has become a prior art problem can be prevented and even if the container is repeatedly used, the pulling-up operation of the second side wall 21 can be carried out stably and smoothly. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  According to the present invention, a pair of side walls are pivotally connected to a pair of outer edges facing each other out of a rectangular bottom wall, and a pair of side wall support protrusions projecting upward from the remaining pair of outer edges. The present invention relates to a folding container in which a pair of side walls are rotatably connected to a portion, and the four side walls can be folded on top of a bottom wall.

In this type of folding container, as shown in FIG. 16, a hinge pin 3 provided on the side wall 2 is engaged with a pin engaging groove 4 provided on the side wall supporting projection 1 so as to be movable up and down and rotatable. And in order to stand the folded side wall 2 on the side wall support protrusion 1, the movement center (namely, hinge pin 3) of the side wall 2 moves to the upper end part of the side wall support protrusion 1, and the side wall. 2 is required to rotate. However, in the conventional folding container, the side wall 2 rotates before the center of rotation of the side wall 2 moves to the upper end of the side wall support projection 1, and the rotation base end 2 </ b> A of the side wall 2 and the hinge pin 3 are connected. In some cases, the side wall support protrusions 1 are pressed and caught from opposite directions (see, for example, Patent Document 1). In contrast, the conventional folding container shown in FIG. 17 employs a configuration in which a force (F2 in the figure) that causes the hinge pin 3 to be directed upward is generated by inclining the pin engaging groove 4 (for example, FIG. 17). , See Patent Document 2).
Japanese Patent Laying-Open No. 2005-350108 (FIG. 14) Japanese Patent Laying-Open No. 2005-255241 (paragraphs [0008] and [0021], FIG. 7)

  However, even in the conventional folding container in which the pin engaging groove 4 is inclined, when the operation of causing the side wall 2 is repeated, the slidability deteriorates and the operation of causing the side wall 2 cannot be performed smoothly. . Further, in order to reduce the height of the entire folding container in a state where the side wall is folded, the pivot base end 2A of the side wall 2 and the hinge pin 3 are compared with those of the patent document 1 as in the folding container of Patent Document 2. It is necessary to narrow the interval between Then, since the pivot base end 2A of the side wall 2 comes into contact with the side wall support protrusion 1 only by slightly raising the side wall 2, a structure capable of performing the raising operation of the side wall 2 more smoothly is required.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a folding container capable of stably and smoothly performing a raising operation of a folded side wall.

  A folding container according to the invention of claim 1 made to achieve the above object has a pair of first side walls rotatably connected to a pair of outer edge portions opposed to each other in a rectangular bottom wall. A pair of second side walls are pivotally connected to a pair of side wall support protrusions protruding upward from the remaining pair of outer edge portions, and the first and second side walls are overlapped on the bottom wall and folded. In a foldable container, a handle portion to be gripped or fingered when the folded second side wall is raised is arranged at the same position as the center of gravity of the second side wall or closer to the center of rotation of the second side wall than the center of gravity. It has the feature in place.

  According to a second aspect of the present invention, in the folding container according to the first aspect, the handle includes a lateral rib protruding from the outer surface of the second side wall and extending in the lateral direction of the second side wall, and a second portion from the tip of the lateral rib. It is characterized in that it is constituted by a finger hook rib protruding toward the rotation center side of the side wall.

  The invention of claim 3 is characterized in that, in the folding container of claim 1 or 2, a relatively large number of reinforcing ribs for reinforcing the second side wall are provided on the side opposite to the rotation center.

  According to a fourth aspect of the present invention, in the folding container according to any one of the first to third aspects, the connecting portion between the second side wall and the side wall supporting projection is directed from the end of the second side wall toward the rotation center. A protruding hinge arm, an arm receiving portion that is formed on the side wall supporting protrusion and receives at least the tip of the hinge arm, a hinge pin that protrudes laterally from the tip of the hinge arm, and an inner surface of the arm receiving portion And a pin engaging groove engaged with the hinge pin so as to be movable up and down and turnable, and the pin engaging groove has a feature that it becomes wider as it goes downward.

  According to a fifth aspect of the present invention, in the folding container according to the fourth aspect, the hinge pin is formed on the outer inner side surface in the arm receiving portion and is slidably contacted with the hinge pin or the hinge arm when the second side wall is folded from the standing state. It has a feature in that it is provided with a moving guide that moves toward the inner side of the arm receiving portion.

[Invention of Claim 1]
In the folding container according to claim 1, the handle is disposed at the same position as the center of gravity of the second side wall or on the rotation center side from the center of gravity. When gripping and pulling upward, the second side wall translates upward, or the rotation center side of the second side wall moves upward prior to the rotation tip side. And the 2nd side wall rotates toward a standing posture in the state where the rotation center of the 2nd side wall was located in the upper end part of the side wall support protrusion. Thereby, the catch between the 2nd side wall and the side wall support protrusion which became a problem conventionally is prevented, and even if it uses repeatedly, the raising operation of the 2nd side wall can be performed stably and smoothly.

[Invention of claim 2]
In the folding container according to claim 2, when the folded second side wall is caused, when the fingertip is hung on the tip end portion of the finger hooking rib, the handle portion and the fingertip are in line contact, and the contact portion serves as a second point. The side wall is easily turned. Thereby, no matter how many people put their fingers on the handle part and operate it, variation in the behavior of the second side wall can be suppressed.

[Invention of claim 3]
In the folding container according to claim 3, since a relatively large number of reinforcing ribs that reinforce the second side wall are provided on the side opposite to the rotation center, the center of gravity of the second side wall is located on the opposite side of the rotation center. Can be disposed near the center of the second side wall, and the strength of the opening of the folding container can be increased.

[Invention of claim 4]
In the folding container according to the fourth aspect, since the pin engaging groove becomes wider toward the lower side, the hinge pin can be easily moved from the lower end portion to the upper end portion of the pin engaging groove.

[Invention of claim 5]
In the folding container according to the fifth aspect, when the second side wall is folded from the upright state, the hinge pin is brought closer to the inner side of the arm receiving portion by the guide of the approaching guide. Thereby, when the rotation base end part of the 2nd side wall is separated from the side wall support protrusion, and the 2nd side wall is caused, it is prevented from being caught by the rotation base end part of the 2nd side wall and the side wall support protrusion. Can do.

[First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the folding container 10 according to the present embodiment has a box shape having an open top surface and a rectangular planar shape. Then, a pair of first side walls 11, 11 facing in the horizontal first direction H <b> 1 with the long side of the rectangle extending, and a pair of second side walls 21 facing in the horizontal second direction H <b> 2 with the short side extending, 21 is pivotally connected to the base portion 30, and the first and second side walls 11, 11, 21, 21 are overlapped on the bottom wall 31 of the base portion 30, and the side wall folding shown in FIG. Can be in a state.

  As shown in FIG. 3, a pair of side wall support protrusions 32, 32 according to the present invention are directed upward from a pair of outer edge portions facing in the horizontal second direction H <b> 2 of the bottom wall 31 provided in the base portion 30. A pair of bank portions 33, 33 that protrude lower than the side wall support protrusions 32, 32 protrude upward from the remaining pair of outer edge portions. Further, base reinforcing ribs 34 for reinforcing the side wall support protrusion 32 are provided at the corners where the side wall support protrusion 32 and the bank portion 33 intersect with each other from the side edge of the side wall support protrusion 32 to the upper surface of the bank portion 33. It is formed across.

  A plurality of arm receiving portions 35 are formed on the side wall support protrusion 32 at intervals in the lateral direction. The arm receiving portion 35 is open to the upper surface and the inner surface of the side wall support protrusion 32. The inside of the arm receiving portion 35 is wider than the inner surface opening of the side wall support protrusion 32, and the portion of the arm receiving portion 35 that faces the inner surface opening of the side wall support protrusion 32 sandwiches the pin according to the present invention. The engaging grooves are 35M and 35M.

  The pin engagement groove 35M has substantially the same width in the vertical direction as shown in an enlarged view in FIG. Further, a retaining projection 35B is formed in the arm receiving portion 35 at the upper end portion of the groove constituting wall 35A provided on the inner side of the pin engaging groove 35M in the side wall supporting protrusion 32. As shown in FIG. 4, the retaining protrusion 35B protrudes from the groove constituting wall 35A as it goes downward, and the lower end surface of the retaining protrusion 35B is orthogonal to the groove constituting wall 35A. A portion sandwiched between the retaining protrusion 35B and the inner surface of the arm receiving portion 35 becomes a pin assembly hole 35C according to the present invention, and a hinge pin 23 described later can be inserted into the pin engaging groove 35M from here. it can. A stopper wall 35D is formed at the lower end of the arm receiving portion 35 at the center in the lateral direction, and a hinge arm 22 to be described later abuts against the stopper wall 35D to restrict downward movement from the arm receiving portion 35. The

  As shown in FIG. 3, the bank portion 33 is provided with auxiliary arm receiving portions 36 and the above-described arm receiving portions 35 alternately arranged in the lateral direction of the bank portion 33. The auxiliary arm receiving portion 36 is open to the upper surface and the inner surface of the bank portion 33. In addition, a pair of locking projections 36B and 36B are provided side by side at the upper end of the auxiliary arm receiving portion 36.

  As shown in FIG. 5, a plurality of hinge arms 22 are formed so as to protrude from the rotation base end portion 21 </ b> Z of the second side wall 21 so as to correspond to the arm receiving portion 35 of the side wall support protrusion 32. As shown in an enlarged view in FIG. 6, the hinge arm 22 includes a reinforcing wall 22 </ b> B between a pair of opposed pieces 22 </ b> A and 22 </ b> A that hang downward from the rotation base end 21 </ b> Z of the second side wall 21. I will give you. A pair of hinge pins 23, 23 protrude from the distal end portion of the hinge arm 22 in opposite lateral directions. In a state where the second side wall 21 stands, a curved surface 23A is provided on the lower surface side of the hinge pin 23, a horizontal surface 23B is provided on the upper surface side, and one edge of the second side wall 21 in the thickness direction of the horizontal surface 23B. The projecting portion 23C protrudes upward.

  When the second side wall 21 is assembled to the side wall support protrusion 32, the second side wall 21 is horizontally laid, and the hinge pins 23, 23 are pushed into the pin assembly holes 35C, 35C of the arm receiving portion 35 from the one edge side described above. It is. Then, the hinge pin 23 is slidably brought into contact with the retaining protrusion 35B, the groove forming wall 35A is bent, and the groove forming wall 35A is restored when the hinge pin 23 passes through the pin assembly hole 35C. As a result, the hinge pin 23 is held in a state in which the hinge pin 23 can move up and down and turn in the pin engagement groove 35M, and the second side wall 21 is connected to the side wall support protrusion 32 so as to be turnable. .

  Although not shown, the base end portion of the first side wall 11 is provided with a plurality of hinge arms 22 corresponding to the arm receiving portion 35 of the bank portion 33 and corresponding to the auxiliary arm receiving portion 36, similarly to the second side wall 21. An auxiliary hinge arm is provided. The hinge arm 22 and the auxiliary hinge arm are received by the arm receiving portion 35 and the auxiliary arm receiving portion 36, respectively, and the first side wall 11 is rotatably connected to the bank portion 33.

  As shown in FIG. 5, reinforcing ribs 21 </ b> H extend vertically and horizontally over the entire outer surface of the second side wall 21. Reinforcing ribs 21H are provided in a relatively large amount on the opposite side of the second side wall 21 from the rotation center, that is, on the rotation tip side. As a result, the center of gravity G1 of the second side wall 21 is arranged closer to the turning tip as shown in FIG. As shown in FIG. 1, a plurality of locking holes 24 and cantilever-like lock pieces 21 </ b> K are formed at both ends of the second side wall 21 in the lateral direction.

  As shown in FIG. 1, reinforcing ribs 11 </ b> H are formed on the outer surface of the first side wall 11 near the outer edge. Further, a finger locking portion 11A is formed at the tip end portion (the upper end portion in FIG. 1) of the first side wall 11. Further, a plurality of locking projections 14 are formed at both lateral ends of the first side wall 11 so as to correspond to the locking holes 24 of the second side wall 21. When the first side walls 11, 11 are raised with the second side walls 21, 21 standing up, the first side walls 11 come into contact with both end walls of the second side wall 21, and the respective locking projections 14 are engaged with each other. The first side wall 11 and the second side wall 21 are held in an upright state by entering the stop hole 24 and the lock piece 21K being engaged with the inner surface of the first side wall 11.

  As shown in FIG. 5, a handle 40 according to the present invention is formed on the outer surface of the second side wall 21. The handle portion 40 is integrally formed with a pair of central reinforcing ribs 21H1 and 21H1 extending in the vertical direction at the horizontal central portion of the second side wall 21 of the reinforcing rib 21H. Specifically, the handle part 40 is configured by a gate-shaped protrusion that protrudes in the opposite lateral direction from the central reinforcing ribs 21H1 and 21H1. The gate-shaped protrusions are a pair of leg protrusions 43, 43 extending in the protruding direction of the central reinforcing rib 21H1 and spaced in the longitudinal direction of the central reinforcing rib 21H1, and the leading edge of the central reinforcing rib 21H1 It consists of finger locking ridges 42 protruding in the lateral direction (horizontal first direction H1) from the portion sandwiched between the leg ridges 43, 43. In addition, a pair of lateral ribs 41 and 41 are provided at the same position of the leg protrusions 43 and 43 between the central reinforcing ribs 21H1 and 21H1. And as shown in FIG. 7, the handle part 40 is arrange | positioned with respect to the gravity center G1 among the 2nd side walls 21 at the rotation center side. Specifically, the leg protrusion 43 is disposed at substantially the same position as the center of gravity G1, and the finger locking protrusion 42 is disposed on the base end side with respect to the center of gravity G1.

  The configuration of the folding container 10 of the present embodiment is as described above. Next, functions and effects of this embodiment will be described.

  In order to store the luggage in the folding container 10, the side walls are erected in such a manner that the first side wall 11 and the second side wall 21 are all upright with respect to the bottom wall 31 as shown in FIG. 1. When the package is taken out at the package transport destination and the folding container 10 is returned, the side wall is folded. For that purpose, when the lock by the lock pieces 21K and 21K (see FIG. 1) of the folding container 10 is released and one of the first side walls 11 is folded on the bottom wall 31, the other side of the first side wall 11 is placed on the other side of the first side wall 11. The second side wall 21 is folded so as to overlap. Next, one second side wall 21 is folded on the first side wall 11, and the other second side wall 21 is folded thereon.

  At this time, the hinge arm 22 of the second side wall 21 protrudes inward from the inner surface opening of the side wall support protrusion 32 (see FIG. 8A), and the second side wall 21 is in relation to the side wall support protrusion 32. Can be moved up and down. And both the 2nd side walls 21 and 21 are shifted up and down, and are folded up in a mutually parallel state. The same applies to the first side walls 11 and 11. In the present embodiment, the second side wall 21 moves up and down more than the first side wall 11 between the side wall standing state and the side wall folded state, and the first side wall 11 and the second side wall 2 in the side wall standing state. The upper surfaces of the side walls 21 are flush with each other.

  As shown in FIG. 2, the first and second side walls 11, 11, 21, and 21 are stacked and accommodated between the side wall support protrusions 32 and 32 in a side wall folded state. As shown in FIG. 8A, the uppermost second side wall 21 is located slightly below the upper surfaces of the side wall support protrusions 32 and 32. When another folding container 10 is stacked above the folding container 10, the rib group 31 </ b> G provided on the lower surface of the upper folding container 10 is between the side wall support protrusions 32, 32 of the lower folding container 10. To prevent misalignment.

  In order to bring the folding container 10 into the side wall standing state again, first, the second side walls 21 and 21 are raised on the side wall supporting protrusions 32 and 32. For this purpose, the handle portion 40 may be gripped and pulled upward. Specifically, for example, the thumb and the index finger are hooked on the two finger locking ridges 42 and 42 so as to sandwich the central reinforcing ribs 21H1 and 21H1 from both sides. At this time, since the positions of the thumb and index finger are regulated by the leg protrusion 43, the intermediate portion in the longitudinal direction of the finger locking protrusion 42 is the gripping position P1 unless otherwise noted (see FIG. 8B). become. Further, even if the two central reinforcing ribs 21H1 and 21H1 are strongly gripped so as to pull each other, the lateral ribs 41 and 41 restrict the bending of the central reinforcing ribs 21H1 and 21H1 to the inside, so that the fingers are not unlocked. .

  When the handle 40 is gripped and the second side wall 21 is pulled upward, the second side wall 21 receives a moment due to its own weight with the gripping position P1 as a fulcrum. Here, since the finger locking ridge 42 of the handle portion 40 is disposed on the rotation center side from the center of gravity G1 of the second side wall 21, the gripping position P1 is also positioned on the rotation center side from the center of gravity G1. As a result, when the handle portion 40 is pulled upward, the rotation center side of the second side wall 21 moves upward earlier than the opposite rotation tip side as shown in FIG. 9A. Then, the hinge pin 23 contacts the inner surface of the upper end portion of the pin engaging groove 35M (specifically, the lower surface of the retaining protrusion 35B). Here, the pin engaging groove 35M has the same width and extends in the vertical direction (see FIG. 10A). Thereby, the hinge pin 23 can be easily moved from the lower end part of the pin engaging groove 35M to the upper end part. Then, in a state where the hinge pin 23 is in contact with the inner surface of the upper end portion of the pin engaging groove 35M (the lower surface of the retaining projection 35B), the second side wall 21 rotates around the hinge pin 23 and is raised to the standing posture (see FIG. 9 (B)). When the second side wall 21 is in the standing posture, as shown in FIG. 10B, the engaging protrusion 23C of the hinge pin 23 faces the lower surface of the retaining protrusion 35B, and the hinge pin 23 is more firmly in the pin engaging groove 35M. Retained.

  When both the second side walls 21 and 21 are erected as described above, the first side walls 11 and 11 are then erected. Here, the first side wall 11 moves less in the vertical direction than the second side wall 21, and the bank portion 33 and the first side wall 11 are not caught in the present embodiment. For this reason, in order to make the 1st side wall 11 stand up, it suffices to put the finger on the finger locking portion 11A and pull it up. And if the 1st side walls 11 and 11 are made to stand, the folding container 10 will be in the side wall standing state again.

  As described above, according to the folding container 10 of the present embodiment, since the handle portion 40 is disposed closer to the center of rotation than the center of gravity of the second side wall 21, the handle portion 40 of the folded second side wall 21 is gripped. By simply pulling upward, the rotation center side of the second side wall 21 moves upward before the rotation tip side. And the 2nd side wall 21 can be rotated toward a standing posture in the state where the rotation center of the 2nd side wall 21 was located in the upper end part of the side wall support protrusion 32. FIG. As a result, the catch between the second side wall 21 and the side wall support protrusion 32, which has been a problem in the past, can be prevented, and the operation of causing the second side wall 21 to be performed stably and smoothly even when used repeatedly. it can. Further, since a relatively large number of reinforcing ribs 21H that reinforce the second side wall 21 are provided on the side opposite to the rotation center, the center of gravity G1 of the second side wall 21 is located on the opposite side of the rotation center. While being able to arrange | position near the center of the 2nd side wall 21, the intensity | strength of the opening part of the folding container 10 can be raised. Furthermore, since the handle part 40 is provided in the center of the 2nd side wall 21, the raising operation of the 2nd side wall 21 can be performed with one hand.

[Second Embodiment]
This embodiment is shown in FIGS. 11 and 12, and only the handle portion 45 on the second side wall 21 is different from the handle portion 40 of the first embodiment. That is, as shown in FIGS. 11A and 11B, the handle portion 45 of the present embodiment has the second side wall 21 from the end edge portion of the lateral rib 46 that is inserted between the central reinforcing ribs 21H1. The finger hook rib 47 protrudes toward the rotation center side. Further, both end portions of the finger hook rib 47 are connected to the central reinforcing ribs 21H1 and 21H1. Furthermore, as shown in FIG. 12, the lateral rib 46 is located on the rotation center side with respect to the center of gravity G <b> 2 of the second side wall 21. Since other configurations are the same as those of the first embodiment, the same portions are denoted by the same reference numerals, and redundant description is omitted.

  According to the configuration of the folding container 10 of the present embodiment, when the folded second side wall 21 is caused, the fingertip is hung on the tip end portion of the finger hanging rib 46, and the handle portion 45 and the fingertip are in line contact, The second side wall is easily turned around the contact portion as a fulcrum. Thereby, no matter how many people put the finger on the handle portion 45 and operate it, variation in the behavior of the second side wall 21 can be suppressed. And the rotation center side of the 2nd side wall 21 moves upwards reliably ahead of the rotation front end side, and the raising operation of the 2nd side wall 21 can be performed more stably and smoothly.

[Third Embodiment]
This embodiment is shown in FIG. 13 and FIG. 14, wherein the arm receiving portion 35 is provided with a shift rib 35Y (corresponding to a “shift guide” according to the present invention), and the hinge pin 23P is circular in cross section. This is different from the first embodiment. As shown in FIG. 13, the abutment rib 35Y is formed on the outer inner side surface 35F located near the outer side surface of the side wall support protrusion 32 in the arm receiving portion 35, and is located between the pin engaging grooves 35M and 35M. Is arranged. Further, as shown in FIG. 14, the abutment rib 35Y extends over the stopper wall 35D from the same position as the lower end portion of the retaining protrusion 35B. The amount of protrusion from the wall surface 35F gradually increases from the top to the bottom. Since other configurations are the same as those of the first embodiment, the same portions are denoted by the same reference numerals, and redundant description is omitted.

  According to the folding container 10 of the present embodiment, when the second side wall 21 is folded from the upright state, the abutment rib 35Y is in sliding contact with the reinforcing wall 22B of the hinge arm 22, and the hinge pin 23P is placed inwardly within the arm receiving portion 35. The inner surface 35G (the inner surface of the groove constituting wall 35A) is brought closer. As a result, the pivot base end 21Z of the second side wall 21 is separated from the side wall support projection 32, and when the second side wall 21 is caused, the pivot base end 21Z of the second side wall 21 and the side wall support projection 32 are provided. Can be prevented. Further, since the hinge pin 23P is moved away from the pin assembly hole 35C by the shifting rib 35Y, the effect of preventing the hinge pin 23P from coming off is also achieved.

  In addition, it replaces with the above-mentioned approach rib 35Y, and there exists an effect similarly even if it is the structure which the outer side inner side surface 35F of the arm receiving part 35 protrudes toward the inner side inner side surface 35G as it goes below.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

  (1) In the first and second embodiments, the finger locking ridge 42 and the finger hooking rib 47 for hooking the finger are provided. However, it is not always necessary to have a configuration in which the finger is hooked on the handle portion. That is, for example, the finger locking ridge 42 is excluded from the handle portion 40 of the first embodiment, and the portion sandwiched between the leg ridges 43 and 43 in the central reinforcing rib 21H11 is used as the handle portion. You may make it the structure which pulls up the 2nd side wall 21 with the frictional force of the hold | gripped state.

  (2) In the first embodiment, the handle portion 40 of the second side wall 21 is disposed on the proximal end side with respect to the center of gravity G1, but the handle portion 40 is disposed at the same position as the center of gravity G1, and the handle portion 40 is When the second side wall 21 is pulled up, the second side wall 21 may be translated upward while maintaining a horizontal posture.

  (3) Also in the first side wall 11 of the first embodiment, the finger locking portion 11A is arranged on the rotation center side from the center of gravity, and when the first side wall 11 is raised, the rotation center side is higher than the rotation tip side. You may make it the structure which moves to.

  (4) Although the pin engagement groove 35M of the first embodiment has substantially the same width in the vertical direction, the pin engagement groove 35M may be made wider as it goes downward as shown in FIG. Thereby, the hinge pin 23P can be moved more easily from the lower end portion of the pin engaging groove 35M to the upper end portion.

The perspective view of the folding container which concerns on 1st Embodiment of this invention. Perspective view of folding container in side wall folded state Perspective view of base part of folding container Partial enlarged perspective view of the base portion Perspective view of the second side wall of the folding container Partial enlarged perspective view of the second side wall Side sectional view of the second side wall Side cross-sectional view of folding container in side wall folded state Side sectional view of the folding container with the second side wall upright Side sectional view of the pivot base end of the second side wall and the side wall support protrusion. The perspective view of the 2nd side wall in the folding container which concerns on 2nd Embodiment. Side sectional view of the second side wall The perspective view of the base part of the folding container of 3rd Embodiment Side sectional view of second side wall and side wall support protrusion Side sectional view of second side wall and side wall supporting projection of other embodiment Side sectional view of the side wall and side wall support protrusion of a conventional folding container Side sectional view of the side wall and side wall support protrusion of a conventional folding container

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Folding container 11 1st side wall 21 2nd side wall 22 Hinge arm 23, 23P Hinge pin 31 Bottom wall 32 Side wall support protrusion 35 Arm receiving part 35A Groove structure wall 35B Pinning protrusion 35C Pin assembly hole 35M Pin engagement groove 35Y Shifting rib 36B Locking projection 40, 45 Handle part 41, 41 Horizontal rib 42 Finger locking protrusion 46 Horizontal rib 47 Finger hook rib G1, G2 Center of gravity P1 Grasping position

Claims (5)

A pair of first side walls are rotatably connected to a pair of outer edges facing each other in the rectangular bottom wall, and a pair of side wall support protrusions projecting upward from the remaining pair of outer edges. In a folding container in which a pair of second side walls are rotatably connected, and the first and second side walls can be folded on top of the bottom wall,
The handle part to be gripped or hung when the folded second side wall is raised is disposed at the same position as the center of gravity of the second side wall or on the rotation center side of the second side wall from the center of gravity. Features a folding container.   The handle includes a lateral rib projecting from the outer surface of the second side wall and extending in the lateral direction of the second side wall, and a finger hook projecting from the tip of the lateral rib toward the rotation center side of the second side wall. The folding container according to claim 1, comprising a rib.   The folding container according to claim 1 or 2, wherein a relatively large number of reinforcing ribs that reinforce the second side wall are provided on the side opposite to the rotation center. The connecting portion between the second side wall and the side wall support protrusion includes a hinge arm protruding from the end of the second side wall toward the center of rotation, and formed on the side wall support protrusion to An arm receiving portion that receives at least the tip portion, a hinge pin that protrudes laterally from the tip portion of the hinge arm, and an inner surface of the arm receiving portion that engages the hinge pin so that the hinge pin can move up and down and rotate. Pin engaging grooves,
The folding container according to any one of claims 1 to 3, wherein the pin engaging groove is widened downward. Formed on the outer inner surface in the arm receiving portion, and when the second side wall is folded from an upright state, the hinge pin or the hinge arm is slidably brought into contact with the inner pin on the inner inner surface in the arm receiving portion. The folding container according to claim 4, further comprising a guide.

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