JP5992797B2 - Folding container - Google Patents

Description

  The present invention relates to a folding container used for transporting articles.

  2. Description of the Related Art Conventionally, a substantially rectangular plate-shaped bottom wall portion and a side wall portion rotatably connected to each side portion of the bottom wall portion are provided, and each side wall portion is overlapped above the bottom wall portion. A folding container that can be folded inward is known (for example, see Patent Document 1).

JP 2001-335027 A

  By the way, in view of the transportation efficiency and storage efficiency of the “article”, it is desirable that the extra space in which no article exists is as small as possible. For this reason, in general, a large number of containers having different volumes are prepared and used in accordance with the size of articles to be stored.

  However, as the number of types of containers increases, there is a concern that the total number of containers increases and an extra storage space is required. In addition, there is a risk that the sorting operation when sorting and storing a plurality of types of containers and the task of collecting only the containers to be used when the plurality of types of containers are stored together may become complicated. Therefore, when transporting goods using containers, the work efficiency at the container preparation and tidying stage decreases, the storage efficiency of the "container" itself decreases, and the cost increases due to these problems It is feared that it will invite.

  The present invention has been made to solve the above-described problems and the like, and its purpose is to provide a highly convenient folding container that can handle a plurality of types of articles having different sizes and the like. is there.

  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. A bottom wall portion having a substantially rectangular plate shape and each side portion of the bottom wall portion are provided corresponding to the side wall portions of the bottom wall portion, and are erected above the bottom wall portion along the side sides of the bottom wall portion. In a folding container comprising a standing position and a side wall configured to be rotatable between a standing position and a sleeping position folded above the bottom wall,
The side wall portions overlap a pair of opposed first side wall portions that are folded so as to overlap with the upper side of the bottom wall portion, and an upper side of the pair of first side wall portions folded on the upper side of the bottom wall portion. A pair of opposing second side wall portions that are folded in this manner,
The second side wall portion is attached to a slide side base wall rotatably attached to the bottom wall portion, and is attached to the slide side base wall so as to be slidable along the height direction of the second side wall portion. And a slide side extending wall,
The slide side extension wall has a reference position relative to the slide side base wall, and an area overlapping the slide side base wall is smaller than that at the reference position, and is in the standing position of the second side wall portion. It is configured to be relatively displaceable to an extended position where the height is higher than when the height is at the reference position,
The first side wall portion is centered on a deployment side base wall rotatably attached to the bottom wall portion, and an axis extending along the upper side portion of the deployment side base wall with respect to the deployment side base wall. A deployment-side extension wall that is pivotally attached;
The deployment side extension wall is displaced from the deployment side base wall by a reference position provided in parallel with the deployment side base wall and by approximately 180 degrees from the state at the reference position. It extends upward from the upper side, and is configured to be relatively displaceable to an extended position where the height when the first side wall is in the standing position is higher than when it is at the reference position. A folding container.

  According to the means 1, in the folding container that can fold the side wall portion, each side wall portion in the standing position can be expanded and contracted to change the volume of the folding container. For this reason, the volume of a folding container can be changed according to the magnitude | size, quantity, etc. of the articles | goods accommodated in a folding container, and the surplus space in which the articles | goods do not exist in a folding container can be made small as much as possible. In other words, it is possible to deal with a plurality of types of articles having different sizes and quantities, etc., on the premise that the folding container in a state in which the articles are accommodated is made compact and the efficiency of carrying and storing the articles is improved. be able to. Therefore, it is possible to suppress the situation that many types of folding containers having different volumes are prepared, to improve the storage efficiency of the folding container itself, and to prepare the folding container when carrying the article using the folding container.・ It is possible to improve work efficiency in the cleanup stage. As a result, it is possible to reduce the cost as the storage space is reduced and the working time is shortened.

  Moreover, in the structure which a side wall part does not expand-contract, when the length which added the height of a pair of opposing side wall part is longer than the distance between the said pair of side wall parts, a pair of opposing side wall part is piled up and down. Can only be folded. Furthermore, it is necessary to be able to shift the height position of the rotation shaft of the side wall portion so that the pair of opposite side wall portions overlap each other. That is, even if it is folded, the upper and lower widths are relatively thick (not very compact), and the configuration may be complicated. In addition, when the height of the predetermined side wall portion is larger than the width of the bottom wall portion, the folding structure itself is impossible. For this reason, there are not many folding containers whose side wall portions are relatively high, and there are many types of articles that cannot be accommodated as objects for accommodation.

  In this respect, by configuring the side wall portion to be extendable and contractable like the present means 1, for example, in the extended state of the side wall portion, the length obtained by adding the height of the pair of opposite side wall portions is between the pair of side wall portions. Even if the shape is longer than this distance, the height of the pair of opposite side walls that are set to the laying position can be reduced by setting the side walls to a contracted state (with the extended wall as the reference position). It is also possible to fold them as compactly as possible. In this case, by making the folding container in a folded state compact, it is possible to cope with more types of article shapes while improving the transportation and storage efficiency of the folding container, thereby further improving convenience. it can.

  In addition, for example, even when the shape of the side wall portion is longer than the distance between the side wall portion and the opposite side wall portion when the side wall portion is extended, the side wall portion is shrunk. By setting it as a state, it can also be comprised so that it can displace and fold to a sleeping position, without contacting a side wall part to the side wall part which opposes this.

Mean 2. Comprising a slide preventing means for preventing sliding displacement of the slide side extension wall;
The slide preventing means includes
A slide side locking portion provided on the slide side extension wall;
A deployment side locking portion provided on the first side wall,
By displacing the second side wall portion to the standing position and further displacing the first side wall portion to the standing position, the slide side locking portion and the unfolding side locking portion are locked, and the slide side The folding container according to claim 1, characterized in that sliding displacement of the elongated wall is prevented.

  According to the means 2, the slide side locking portion provided on the slide side extension wall is locked with the development side locking portion provided on the first side wall portion that does not slide in the height direction. The slide displacement of the slide side extension wall can be reliably prevented. Accordingly, a configuration for preventing the slide-side extension wall from sliding alone in the second side wall portion (a configuration in which the slide-side extension wall can be held at the extension position even when the slide-side extension wall at the extension position is pressed downward) The shape of the folded container assembled in a box shape can be reliably maintained while simplifying the configuration. Further, in combination with the above means 1, for example, when the configuration in which both the first side wall part and the second side wall part slide in the height direction is used, the sliding displacement of the first side wall part is adopted. It is not necessary to separately provide a configuration for preventing the configuration, and the shape of the folded container assembled in a box shape can be more reliably maintained (rattle rattling) while simplifying the configuration.

  When the folding container is assembled into a box shape, the second side wall can be freely expanded and contracted by sliding the slide side extension wall until the first side wall is displaced to the upright position. Further, for example, when the folding container is assembled or folded, as in the case of separately providing a configuration for preventing the sliding side extending wall from sliding independently on the second side wall portion, the sliding side extending wall There is no need to perform an operation for switching between a state where sliding is allowed and a state where sliding is prevented. Therefore, it is possible to improve the workability during assembly and folding.

Means 3. A fall prevention means for preventing tilting displacement to the outside of the first side wall portion in the standing position;
The overturn prevention means is provided at least on the slide side extension wall,
When the folding container is assembled in a box shape with the slide- side extension wall and the deployment-side extension wall in the reference position, the expansion-preventing means provided on the slide-side extension wall causes the deployment to occur. The outer surface side of the side base wall is supported,
When the folding container is assembled in a box shape with the slide- side extension wall and the deployment-side extension wall in the extension position, the expansion-preventing means provided on the slide-side extension wall causes the deployment to occur. The folding container according to means 1 or 2, wherein the outer surface side of the side base wall and the outer surface side of the unfolding-side extension wall are supported.

  According to the means 3, the slide-side extension wall is provided with the overturn prevention means for preventing the tilt displacement to the outside of the first side wall, so that the development side extension wall of the first side wall is set at the reference position and the extension position. In any case, the upper side part of the first side wall part that can effectively prevent the tilting displacement of the first side wall part can be supported by the means for preventing the slide side extending wall from falling. In particular, since the deployment side extension wall of the first side wall portion is provided so as to be rotatable with respect to the deployment side base wall, the deployment side extension wall is provided by the overturn prevention means in a state where the deployment side extension wall is in the extension position. By supporting this, it is possible to more reliably prevent the expansion-side expansion wall from falling over and flapping. In addition, for example, the fall prevention means for when the development side extension wall of the first side wall portion is in the reference position and the fall prevention means for when the development side extension wall is in the extension position are separately provided. Compared to the case, the configuration can be simplified, productivity can be improved, cost can be reduced, and the like.

Means 4. Comprising inward prevention means for preventing tilting displacement to the inside of the first side wall portion in the standing position,
The deployment side extension wall of the first side wall portion is configured to be arranged side by side on the inner surface side of the deployment side base wall at the reference position,
The inward prevention means prevents the inclining displacement to the inside of the first side wall by preventing the inclining displacement of the first side wall in the standing position to the inside of the development side extension wall. The folding container according to any one of the means 1 to 3.

  According to the means 4, the first side wall portion is configured such that the development side extension wall can be folded (accommodated) on the inner surface side of the development side base wall. Even if it is, the tilting of the entire first side wall portion is prevented without directly preventing the tilting displacement of the deployment side base wall only by preventing the tilting displacement to the inside of the deployment side extension wall by the inward tilt prevention means. Displacement can be reliably prevented. In addition, since the tilting displacement of the deployment side extension wall is prevented by the inward fall prevention means, it is possible to prevent the deployment side extension wall from flapping, and the deployment side extension wall is at the extension position. In a certain state, the upper part of the first side wall part that can effectively prevent the tilt displacement of the first side wall part can be supported.

  In addition, the inversion prevention means for preventing the tilting displacement to the inside of the first side wall portion is provided inside the deployment side extension wall regardless of whether the deployment side extension wall of the first side wall portion is at the reference position or the extension position. Therefore, even if the development side extension wall of the first side wall portion is in either the reference position or the extension position, the same inward prevention means can be used as described above to prevent the tilt side displacement of the first side wall portion. It is possible to effectively prevent the tilting displacement to. For example, with respect to the inner surface side of the slide side extension wall of the second side wall portion, an elastic piece that supports the surface of the development side extension wall facing the inside of the container is provided, or the center of the development side extension wall in the height direction is provided. For example, there may be a configuration in which a slide piece that can be projected and retracted to the side of the first side wall portion with respect to the portion is provided, and an engagement hole in which the slide piece can be inserted is provided at a corresponding position of the slide side extension wall. Therefore, when the inward fall prevention means for when the development side extension wall of the first side wall portion is in the reference position and the inversion prevention means for when the development side extension wall is in the extension position are provided separately. In comparison, the configuration can be simplified, productivity can be improved, cost can be reduced, and the like. Furthermore, the operation to the inversion prevention means for making the first side wall portion in the standing position inward can be brought down inward is the same regardless of whether the development side extension wall is in the reference position or the extension position. Therefore, the operator can fold the folding container relatively smoothly without being confused by the operation method.

It is a perspective view of the folding container in the state assembled with the side wall as the reference height. It is a perspective view of the folding container in a folded state. It is a perspective view of the folding container in which the long side wall is upright at a reference height and the short side wall is folded. It is a perspective view of the folding container in the state assembled by extending the side wall. It is a perspective view of the folding container in the state which the long side wall part extended and stood up, and the short side wall part was folded. It is a perspective view of the folding container which shows the expansion-contraction process of a short side wall part. It is sectional drawing of a bottom wall part. It is a disassembled perspective view of the long side wall part seen from the inner surface side. It is a disassembled perspective view of the long side wall part seen from the outer surface side. It is a disassembled perspective view of the short side wall part seen from the inner surface side. It is a disassembled perspective view of the short side wall part seen from the outer surface side. It is a perspective view containing the partial cross section which shows the corner part of a folding container. It is sectional drawing of the folding container in the state assembled by making a side wall part into reference | standard height. It is sectional drawing of the folding container in the state assembled by extending a side wall part. It is a perspective view containing the partial cross section for demonstrating the locking mechanism in another embodiment. It is a perspective view containing the partial cross section for demonstrating the locking mechanism in another embodiment. It is a perspective view containing the partial cross section for demonstrating the locking mechanism in another embodiment. It is a perspective view containing the partial cross section for demonstrating the locking mechanism in another embodiment. It is a perspective view containing the partial cross section for demonstrating the locking mechanism in another embodiment. It is a perspective view which shows the expansion | deployment side expansion | extension wall and slide piece in another embodiment. It is a perspective view containing the partial cross section which shows the corner part of the folding container in another embodiment.

  Hereinafter, an embodiment will be described with reference to the drawings. As shown in FIG. 1 to FIG. 3 and the like, the folding container 1 is provided so as to be rotatable in correspondence with a substantially rectangular plate-like bottom wall 2 and a pair of opposed long sides of the bottom wall 2. The long side wall part 3 and the short side wall part 4 provided so as to be rotatable in correspondence with the pair of opposing short side parts of the bottom wall part 2 are provided. In this embodiment, the bottom wall part 2, the long side wall part 3, and the short side wall part 4 are made of polypropylene.

  As shown in FIG. 3, FIG. 7, etc., the bottom wall portion 2 has a long side base portion 5 protruding upward from the bottom wall portion 2 along each long side portion, and a bottom portion along each short side portion. A short side base portion 6 protruding upward from the wall portion 2 is provided. In the present embodiment, the long side wall portion 3 and the short side wall portion 4 are rotatably connected to the long side base portion 5 and the short side base portion 6, respectively. , 7 is configured to be rotatable and displaceable between an upright position erected above 7 and a sleeping position that is folded above the bottom wall 2 and extends in parallel with the bottom wall 2. .

  As shown in FIG. 7, each long side base part 5 and each short side base part 6 are bearing parts for rotatably supporting the long side wall part 3 or the short side wall part 4 respectively. 7 is provided. The bearing portion 7 is configured by forming a pair of bearing holes 9 opposed to each other on a pair of opposed inner surfaces of a bearing recess 8 formed so as to open inside and above the folding container 1. ing.

  Further, the projecting length of the long side base part 5 from the bottom wall part 2 is longer than the projecting length of the short side base part 6 from the bottom wall part 2, and the bearing hole of the long side base part 5 The formation position of 9 is also located above the formation position of the bearing hole 9 of the short side base part 6. Furthermore, each short side base part 6 is provided so that the inner surfaces of a pair of opposing long side wall part 3 may be connected. For this reason, in this embodiment, as shown in FIG. 3, if the short side wall part 4 is not folded first, the long side wall part 3 cannot be folded. Then, as shown in FIG. 2, in a state in which the folding container 1 is folded (folded state in which all the side wall portions 3 and 4 are in the sleeping position), the short side wall portion 4 is placed on the upper surface of the bottom wall portion 2. While being folded so as to overlap (facing each other), the long side wall portion 3 is folded so as to overlap the upper side of the short side wall portion 4.

  In addition, the protruding length of the short side base portion 6 from the bottom wall portion 2 is substantially the same (slightly longer) as the thickness of the short side wall portion 4 and is above the short side wall portion 4 in the laying position. The edge and the upper edge of the short side base portion 6 are substantially flush. Further, the length of the long side wall 3 protruding from the bottom wall 2 is longer than the sum of the thickness of the short side wall 4 and the length of the long side wall 3 and is in the laying position. The upper edge of the side wall portion 3 is positioned below the upper surface of the long side base portion 5.

  Now, in this embodiment, as shown in FIGS. 4-6 etc., it is comprised so that the height of the long side wall part 3 and the short side wall part 4 can be changed (expanded / contracted). Hereinafter, the long side wall 3 and the short side wall 4 will be described more specifically.

  As shown in FIGS. 8 and 9, the long side wall portion 3 as the second side wall portion includes a slide side base wall 11 that is rotatably attached to the long side side base portion 5, and a slide side base. A slide-side extending wall 21 slidably attached to the wall 11 along the height direction of the long side wall 3 is provided.

  The slide-side base wall 11 has a substantially rectangular plate-like base wall main body 12 having substantially the same width as that of the long-side base portion 5 and a lower side portion of the base wall main body 12 (facing the lower side in the standing position and bottom in the lying position). And a hinge portion 13 projecting from a surface facing the outer peripheral side of the wall portion 2. The hinge portion 13 includes a substantially rod-shaped connecting portion 14 that extends vertically downward from the lower side portion of the base wall body 12, and a lateral direction of the long side wall portion 3 from both side surfaces of the distal end portion of the connecting portion 14. And a pair of shaft portions 15 projecting along the axis. Then, the shaft portion 15 is pivotally supported by inserting the shaft portion 15 of the hinge portion 13 of the slide-side base wall 11 into the bearing hole 9 (see FIG. 7) of the bearing portion 7 of the long side base portion 5. Become so. Thereby, the slide side base wall 11 is rotatably connected to the long side base portion 5.

  The slide side extension wall 21 extends along a substantially rectangular plate-like extension wall body 22 attached so as to face the inner surface side of the slide side base wall 11, and the upper side and the left and right side parts of the extension wall body 22. A frame portion 23 projecting outward, and two on the inner peripheral side of the frame portion 23, projecting to the outer surface side of the slide side extension wall 21 and extending along the height direction (vertical direction) of the extension wall body 22. Guide rail 24 (see FIG. 9). A guide hole 25 is formed on the top surface of the guide rail 24 (bottom surface as viewed from the inner surface side of the slide-side extending wall 21) so as to extend vertically along the extending direction of the guide rail 24.

  On the other hand, as shown in FIG. 8, each guide rail 24 is configured to be insertable on the inner surface side of the slide-side base wall 11, and the guide rail 24 allows a relative displacement in the vertical direction. A recess 17 is formed. Then, the guide rail 24 is inserted into the guide recess 17 so that the slide side extension wall 21 is substantially in contact with the inner side of the slide side base wall 11, and the guide is extended from the inner side of the slide side extension wall 21. By attaching a rivet 26 to the bottom surface of the guide recess 17 via the guide hole 25 of the rail 24, the slide side extension wall 21 changes the overlapping area with respect to the slide side base wall 11, so It is mounted so that it can slide.

  As shown in FIG. 9, a lower protrusion 27 having the same protruding length as the guide rail 24 is provided on the outer surface side of the extension wall body 22 along the lower side of the extension wall body 22. On the other hand, as shown in FIG. 8, on the inner surface side of the base wall main body 12 of the slide side base wall 11, the guide recess 17 is communicated, and the lower protrusion 27 is inserted and the lower protrusion 27 is inserted. An allowable recess 18 that allows relative displacement in the vertical direction is provided.

  In addition, regarding the part corresponding to the sliding range of the slide side extension wall 21 in the slide side base wall 11, the lateral width is slightly shorter than that of the slide side extension wall 21, and the frame portion 23 of the slide side extension wall 21. The side portions of the slide plate substantially abut on the side surface of the slide-side base wall 11 (over the outside). Furthermore, in this embodiment, the guide hole 25 extended up and down is formed also in the both-sides part of the frame part 23 of the slide side extension wall 21, and the slide side base wall 11 and the slide side extension wall 21 are piled up. A rivet 26 is attached to the side surface of the base wall main body 12 through the guide hole 25 from the side surface side of the slide side extension wall 21. Incidentally, the slide-side base wall 11 is formed with ribs extending along the side edges of the base wall body 12 on both sides of the allowable recess 18, but the lower protrusion 27 and the frame of the slide-side extension wall 21 are formed. Since a gap through which such a rib can be inserted is formed between the left and right side portions of the portion 23, the guide rail 24 and the lower protrusion 27 are reliably inserted into the guide recess 17 and the allowable recess 18. Can be made.

  In the present embodiment, the slide side extension wall 21 is configured such that the lower surface of the upper side portion of the frame portion 23 of the slide side extension wall 21 abuts the upper surface of the base wall body 12 of the slide side base wall 11 with respect to the slide side base wall 11. The position (see FIG. 1, FIG. 13, etc.) and the extension in which the upper surface of the lower protrusion 27 of the slide side extension wall 21 abuts the upper edge (the surface facing downward) of the allowable recess 18 of the slide side base wall 11. It is configured to be capable of relative displacement with respect to the position (see FIGS. 4 and 14 etc.). When the slide-side extension wall 21 is in the extension position, the area of the slide-side base wall 11 overlapping the base wall body 12 is smaller than when the slide-side extension wall 21 is in the reference position. The height when it is in the standing position of 3 is increased.

  When the slide side extension wall 21 is in the reference position, the upper surface of the base wall main body 12 and the lower surface of the upper side of the frame portion 23 of the extension wall main body 22 come into contact with each other, so Further downward relative displacement of the side extension wall 21 is prevented. Further, when the slide side extension wall 21 is displaced to the extension position, the upper surface of the lower protrusion 27 of the slide side extension wall 21 abuts the upper edge of the allowable recess 18 of the slide side base wall 11, Further upward displacement (disengagement) of the slide side extension wall 21 with respect to the slide side base wall 11 is prevented.

  As shown in FIGS. 10 and 11, the short side wall portion 4 as the first side wall portion includes a development side base wall 31 that is rotatably attached to the short side base portion 6, and a development side base wall. And a deployment-side elongated wall 41 that is rotatably attached corresponding to the upper side of 31.

  The development-side base wall 31 includes a substantially rectangular plate-like base wall body 32 having substantially the same lateral width as the short-side base portion 6, and a hinge portion 33 protruding from the lower side portion of the base wall body 32. The hinge portion 33 includes a connecting portion 34 that protrudes vertically downward from the lower side portion of the base wall main body 32, and a pair of protrusions that protrude from both side surfaces of the connecting portion 34 along the lateral width direction of the short side wall portion 4. A shaft portion 35 is provided. And the shaft part 35 is pivotally supported by inserting the shaft part 35 of the hinge part 33 of the deployment side base wall 31 into the bearing hole 9 (see FIG. 7) of the bearing part 7 of the short side base part 6. Become so. Thereby, the expansion | deployment side base wall 31 is connected with respect to the short side base part 6 so that rotation is possible.

  The development side extension wall 41 includes a substantially rectangular plate-like extension wall body 42 having substantially the same width as the base wall body 32 of the development side base wall 31, and an extension hinge part 43 protruding from the lower side of the extension wall body 42. It has. The extending hinge portion 43 protrudes along the lateral width direction of the short side wall portion 4 from both side surfaces of the connecting portion 44 and the connecting portion 44 that protrudes vertically downward from the lower side portion of the extending wall main body 42. And a pair of shaft portions 45.

  On the other hand, as shown in FIG. 10, the inner surface side of the base wall main body 32 of the development side base wall 31 extends along the upper side portion of the base wall main body 32, and the shaft portion 45 of the development side extension wall 41. A bearing portion 37 having a bearing hole 38 capable of pivoting is provided in a projecting manner. Then, the shaft portion 45 of the expansion-side hinge portion 43 of the deployment-side extension wall 41 is inserted into the bearing hole 38 of the bearing portion 37 of the deployment-side base wall 31 so that the shaft portion 45 is pivotally supported. . As a result, the development side extension wall 41 is connected to the development side base wall 31 so as to be rotatable about the bearing part 37 (bearing hole 38) and the shaft part 45 extending along the upper side part of the development side base wall 31. Has been.

  In the present embodiment, the deployment side extension wall 41 is in a standard position with respect to the deployment side base wall 31 and a reference position (see FIG. 1, FIG. 13, etc.) arranged in parallel with the inner surface of the deployment side base wall 31. Is extended by about 180 degrees from the upper side of the development side base wall 31, and the height when the short side wall 4 is in the standing position is higher than when it is at the reference position. (Refer to FIG. 4, FIG. 14, etc.).

  Further, in the base wall main body 32 of the development side base wall 31 of the present embodiment, the upper part facing the development side extension wall 41 at the reference position is thinner than the lower part, so that the reference position is An inner side surface of a certain deployment side extension wall 41 and an inner surface of the base wall main body 32 are substantially flush with each other (the deployment side extension wall 41 at the reference position is accommodated on the inner surface side of the deployment side base wall 31). To be configured. Furthermore, in the present embodiment, the base wall main body 12 has an upper portion that is configured to be thin so as to accommodate the deployment-side extension wall 41 and extends upward from the bearing portion 37. Is rotated to the extended position, the outer side surface of the deployment side extended wall 41 comes into contact with the base wall main body 12 positioned above the bearing portion 37, and further rotation is prevented.

  In the present embodiment, in the state where the folding container 1 is assembled in a box shape that opens upward (assembled state in which all the side wall portions 3 and 4 are in an upright position), the slide side extension wall 21 and the unfolding side extension wall Both the case where 41 is in the reference position and the case where both the slide side extension wall 21 and the development side extension wall 41 are in the extension position, respectively, the upper side part and the short side wall of the long side wall part 3 It is comprised so that the height position of the upper side part of the part 4 may align substantially.

  In the present embodiment, the distance between the pair of long-side side walls 3 (the distance between the pair of long-side bases 5) that is the standing position is the length at which the slide-side extending wall 21 is set as the reference position. In a state where the height of the side wall portion 3 is slightly longer than the length obtained by doubling the height of the side wall portion 3, and the slide side extending wall 21 is in the extended position, the pair of long side wall portions 3 are displaced to the laying position. It is configured not to be able to. Furthermore, the distance between the pair of short side wall portions 4 that are in the standing position is substantially the same as the length that is twice the height of the short side wall portion 4 in which the development side extended wall 41 is in the extended position. In the state in which the development side extension wall 41 is in the extension position, even if the pair of short side wall portions 4 cannot be displaced to the laying position or can be laid down, the development side extension wall 41 flutters. There is a risk that it may become easier or there will be no grip when standing.

  Next, a locking structure for preventing relative displacement between the long side wall 3 and the short side wall 4 in the assembled state of the folding container 1 will be described.

  As shown in FIGS. 3, 5, 8, etc., long side engagement portions 51 that protrude from the inner surface side are provided on the left and right sides of each long side wall 3. The long side engaging portion 51 includes a slide side first engaging convex portion 52 provided at the upper end portion of the slide side extending wall 21 and a slide side second engaging convex portion provided at the lower end portion of the slide side extending wall 21. 53 and a base-side engagement convex portion 54 provided at a position exposed to the inside of the folding container 1 below the slide-side extension wall 21 even when the slide-side extension wall 21 is in the reference position in the slide-side base wall 11. It consists of and.

  The slide-side first engaging convex portion 52 extends substantially downward from the lower surface of the support convex portion 56 and the support convex portion 56 having a substantially rectangular parallelepiped shape protruding from the inner surface of the upper end portion of the slide-side extending wall 21, and extends on the slide side. A locking wall portion 57 connected to the inner surface of the wall 21 (the elongated wall main body 22) is provided. Further, the locking wall 57 is formed with a substantially rectangular locking hole 58 penetrating in the lateral width direction of the long side wall 3. In addition, in the lateral width direction of the long side wall 3, the locking wall 57 is thinner than the support convex 56, and the locking wall 57 corresponds to the central portion of the support convex 56 in the thickness direction. Is provided.

  Further, the slide-side second engagement convex portion 53 and the base-side engagement convex portion 54 do not have the support convex portion 56 like the slide-side first engagement convex portion 52, and are respectively lower ends of the slide-side extending wall 21. And a substantially U-shaped locking wall portion 57 that protrudes inward from the lower end portion of the base wall body 12 of the slide-side base wall 11 and forms a rectangular locking hole 58 on the inner peripheral side. It is configured. In addition, with respect to the slide side first engagement convex portion 52, the upper edge portion of the locking hole 58 is configured by the lower surface of the support convex portion 56. Further, the slide-side first engagement convex portion 52 that is located at the upper corner portion of the long side wall portion 3 and is relatively in contact with another member is provided with the support convex portion 56, so Protection of the stop wall part 57 can be aimed at.

  On the other hand, as shown in FIG. 11 and the like, short side engaging portions 61 that engage with the long side engaging portions 51 are provided on the left and right side portions of the short side wall 4. In the present embodiment, the short-side engagement portion 61 includes four base-side engagement portions (base-side first engagement portion 62 and base-side second engagement from the bottom) formed on the outer surface side of the development-side base wall 31. A joining portion 63, a base-side third engaging portion 64, and a base-side fourth engaging portion 65), and an extending-side engaging portion 66 formed on the outer surface side of the deploying-side extending wall 41 in the standing position. It is composed of

  The base-side first to base-side fourth engaging portions 62, 63, 64, 65 and the extension-side engaging portion 66 open to the outer surface side and the side surface side of the short side wall portion 4, and An engaging recess 67 into which the locking wall portion 57 of the joining portion 51 can be inserted, and protrudes outward from the bottom surface (surface facing outward) of the engaging recess 67 and is inserted into the locking hole 58 of the locking wall portion 57. Possible locking projections 68 are provided. Further, with respect to the base-side fourth engagement portion 65 and the extension-side engagement portion 66, a notch that allows the support convex portion 56 of the slide-side first engagement convex portion 52 to be inserted immediately above the locking projection 68. A portion 69 is formed.

  Then, by assembling the folding container 1 into a box shape, the engagement of the long side engagement portion 51 of the long side wall 3 with the engagement recess 67 of the short side engagement portion 61 of the short side wall 4 The wall portion 57 is relatively inserted, and the bottom surface (the surface facing outward) of the engagement concave portion 67 and the inner surface of the locking wall portion 57 are substantially in contact with each other. Thereby, it is comprised so that the short side wall part 4 may not carry out rotational displacement any more outward (so that it may not fall over). In the present embodiment, the locking wall portion 57 and the engagement recess portion 67 (the bottom surface thereof) constitute an overturn prevention means.

  Further, by assembling the folding container 1 into a box shape, the locking wall portion 57 of the long side engaging portion 51 is relatively inserted into the engaging concave portion 67 of the short side engaging portion 61, and at the same time, The locking projection 68 of the side-side engaging portion 61 is relatively inserted into the locking hole 58 of the locking wall portion 57 of the long-side engaging portion 51. Thereby, the slide displacement to the up-down direction of the slide side expansion wall 21 is prevented. Therefore, by assembling the folding container 1 into a box shape, even if the folding container 1 is lifted by grasping the sliding extension wall 21 at the reference position, the sliding extension wall 21 is slid to the upper extension position side. Can be prevented. Furthermore, even if a downward force is applied to the slide side extension wall 21 at the extension position, it is possible to prevent the slide side extension wall 21 from being slid to the lower reference position side. In the present embodiment, the slide-side first engagement convex portion 52 and the slide-side second engagement convex portion 53 formed on the slide-side extending wall 21 correspond to the slide-side locking portion, and the base side second to fourth. The engaging portions 63, 64, 65, and the extension side engaging portion 66 correspond to the deployment side engaging portion, and the locking walls of the slide side first engaging convex portion 52 and the slide side second engaging convex portion 53. The configuration in which the portion 57 is inserted into the engagement recess 67 and the configuration in which the locking projection 68 is inserted into the locking hole 58 of the slide side first engagement convex portion 52 and the slide side second engagement convex portion 53 are provided. It constitutes a slide prevention means.

  In the present embodiment, the short side engaging portion 61 that engages with the long side engaging portion 51 depends on whether the slide side extending wall 21 and the deployment side extending wall 41 are in the reference position or the extended position. It has been changed. More specifically, as shown in FIG. 1 and the like, the base-side second engagement portion 63 and the base-side fourth engagement portion 65 are folded with the deployment side extension wall 41 and the slide side extension wall 21 as a reference position. When the container 1 is assembled, it engages with the slide side second engagement convex portion 53 and the slide side first engagement convex portion 52 of the long side wall portion 3.

  As shown in FIG. 4 and the like, the base-side third engagement portion 64 and the extension-side engagement portion 66 are used when the folding container 1 is assembled with the deployment-side extension wall 41 and the slide-side extension wall 21 as the extension positions. The slide side second engagement convex portion 53 and the slide side first engagement convex portion 52 of the long side wall portion 3 are engaged with each other.

  For the base-side first engagement portion 62, when the folding container 1 is in the assembled state regardless of whether the deployment-side extension wall 41 and the slide-side extension wall 21 are in the reference position or the extension position, The base side engaging convex part 54 of the long side wall part 3 is engaged.

  As shown in FIGS. 8, 12, etc., the slide-side elongated wall 21 is formed with a substantially U-shaped slit with respect to the elongated wall main body 22 in the vicinity of the slide-side first engaging convex portion 52. Thus, a locking piece 71 that is bent in the thickness direction of the elongated wall main body 22 is provided on the inner peripheral side thereof. The locking piece 71 is connected to the elongated wall main body 22 at the lateral side central portion of the long side wall 3 and extends toward the side end of the long side wall 3. A locking claw 72 protruding from the inner surface of the locking piece 71 is provided. Then, as shown in FIGS. 1 and 4, when the folding container 1 is assembled into a box shape, the inner side surface of the development side extension wall 41 of the short side wall portion 4 (the development side extension wall 41 is the reference position and the extension position). The surfaces facing the inner side of the folding container 1 when in contact with the locking claws 72 are supported. Thereby, the inclination displacement (inward fall) to the inner side of the folding container 1 of the short side wall part 4 is prevented. In the present embodiment, the locking piece 71 constitutes an inversion prevention means. The locking claw 72 has a taper shape in which the protruding length gradually increases toward the tip end of the locking piece 71. When the short side wall 4 is displaced to the standing position, the locking claw 72 is locked. Even if the piece 71 is not directly operated by hand, the short side wall portion 4 can be displaced to the standing position only by rotating and displacing the short side wall portion 4.

  As shown in FIGS. 1 and 2, the bottom wall portion 2 is provided with positioning convex portions 74 that protrude downward from positions near the four corners of the lower surface. On the other hand, the folding containers 1 are stacked in a folded state or an assembled state on both end portions of each long side base portion 5 and both end portions of the upper side portion of each slide side extension wall 21 (stacked). ), A positioning recess 75 into which the positioning protrusion 74 of the upper folding container 1 is fitted is formed. Thereby, the position shift to the horizontal direction at the time of stacking the folding containers 1 is prevented. By the way, in the assembled state of the folding container 1 as described above, the sliding displacement of the slide side extension wall 21 is prevented. For example, the folding container 1 is folded in the state where the folding container 1 is assembled with the slide side extension wall 21 as the extension position. Even if the containers 1 are stacked, it is possible to reliably avoid a situation in which the slide side extension wall 21 of the lower folding container 1 is displaced to the reference position.

  Further, as shown in FIG. 2 and the like, the short side base 6 is opened upward and outward, and is long when the slide side extension wall 21 of the long side wall 3 is set as the laying position as a reference position. An accommodation recess 77 into which the side engagement portion 51 is inserted is formed. Since the long side engaging portion 51 is accommodated in the accommodating recess 77, it is possible to further reduce the size when folded, and more reliably prevent the positional deviation of the long side side wall portion 3 and the like. it can.

  As described above in detail, according to the present embodiment, in the folding container 1 that can fold the long side wall 3 and the short side wall 4, the long side wall 3 and the short side in the standing position. The side wall 4 can be expanded and contracted to change the volume of the folding container 1. For this reason, the volume of the folding container 1 can be changed according to the size, quantity, etc. of the articles accommodated in the folding container 1, and the surplus space in which no articles exist in the folding container 1 can be minimized. In other words, on the premise that the folding container 1 in a state where the article is accommodated is made compact and the efficiency of carrying and storing the article is improved, it corresponds to a plurality of kinds of articles having different sizes and quantities. can do. Therefore, it is possible to suppress a situation in which a large number of folding containers 1 having different volumes are prepared, to improve the storage efficiency of the folding container 1 itself, and to carry out folding when the folding container 1 is used to transport articles. It is possible to improve the work efficiency in the preparation / tidy-up stage of the container 1. As a result, it is possible to reduce the cost as the storage space is reduced and the working time is shortened.

  Moreover, in this embodiment, the length which doubled the height of the long side wall part 3 in which the slide side expansion wall 21 exists in an extended position is longer than the distance between the pair of long side wall parts 3. Has been. Accordingly, the pair of long side wall portions 3 cannot be folded in the state where the slide side extension wall 21 is in the extended position, but the pair of long side wall portions 3 can be formed by using the slide side extension wall 21 as a reference position. The folding container 1 can be folded so that the height of the pair of opposite long side wall portions 3 is aligned (side by side). For this reason, it is not necessary to fold the pair of opposed long side wall portions 3 so as to overlap each other, making the folding container 1 in a folded state compact, simplifying the configuration related to folding, and the like. Can be achieved. Therefore, it is possible to deal with more types of article shapes while improving the transportation and storage efficiency of the folding container 1 as the folding container 1 in the folded state becomes more compact, and the convenience is further improved. Can be planned.

  In addition, according to the present embodiment, the short side wall 4 provided with the expansion side extension wall 41 that rotates and displaces with respect to the expansion side base wall 31 is slid with respect to the slide side base wall 11. The long side wall portion 3 having the side extension wall 21 is configured to be folded before (downward). For this reason, when rotating the short side wall portion 4 between the standing position and the laying position, the development side extension wall 41 comes into sliding contact with the upper surface of the bottom wall portion 2 having no unevenness. For this reason, for example, when the short side wall portion 4 is rotated like the configuration in which the short side wall portion 4 is folded (upward) after the long side wall portion, the unfolding side extension wall 41 is Compared to the case where the outer side of the long side wall 3 having relatively unevenness is slidably contacted, the rotation of the short side wall 4 can be made relatively smooth.

  In addition, for example, the short side wall portion 4 that extends by being unfolded is folded on the upper side of the long side wall portion 3 that extends by sliding, and is moved to the standing position before the long side wall portion 3. When adopting a configuration that must be displaced, providing a convex portion (such as a locking wall portion 57) that prevents the long side wall portion 3 from falling over the short side wall portion 4; However, when the convex portion is provided on the development side extension wall 41 so as to support the vicinity of the upper side portion of the long side wall portion 3, the projections are provided on both the front and back surfaces of the development side extension wall 41. There is a need. For this reason, the configuration is complicated, and in particular, the convex portion formed on the surface facing inward when in the reference position is short when the deployment side extension wall 41 is rotationally displaced to the extension position. There is concern that it may protrude outward from the outer surface of the side wall 4 and may be caught by an operator, may require extra installation space, or may easily be damaged. The Therefore, it is desirable that the short side wall part 4 that extends by being unfolded be folded before the long side wall part 3 that extends by sliding.

  In addition, by assembling the folding container 1 into a box shape, the locking wall portion 57 of the slide-side first engagement convex portion 52 and the slide-side second engagement convex portion 53 provided on the slide-side extending wall 21 is short. The locking projection of the short side wall 4 is inserted into the engagement recess 67 of the side wall 4 and the locking hole 58 of the slide side first projection 52 and slide side second projection 53. 68 is inserted. Thereby, the slide displacement of the slide side extension wall 21 can be reliably prevented by the short side wall portion 4 that does not slide in the height direction. Therefore, a configuration for preventing the slide-side extension wall 21 from sliding alone in the long-side side wall 3 (the slide-side extension wall 21 is set to the extension position even if the slide-side extension wall 21 in the extension position is pressed downward). The configuration of the folding container 1 assembled in a box shape can be reliably maintained while simplifying the configuration. Further, for example, the sliding displacement of the short side wall 4 can be reduced as in the case of adopting a configuration in which both the long side wall 3 and the short side wall 4 are expanded and contracted by sliding in the height direction. It is not necessary to separately provide a configuration for preventing the configuration, and the shape of the folding container 1 assembled in a box shape can be more reliably maintained (rattle rattling) while simplifying the configuration.

  Further, when the folding container 1 is in the assembled state, the long side wall 3 is freely expanded and contracted by sliding the slide side extension wall 21 until the short side wall 4 is displaced to the standing position. Can do. Further, for example, when the folding container 1 is assembled or folded as in the case where a configuration for preventing sliding of the slide side extension wall 21 is separately provided in the long side wall portion 3, the slide There is no need to perform an operation for switching between a state in which the sliding of the side extension wall 21 is allowed and a state in which the sliding is prevented. Therefore, it is possible to improve the workability during assembly and folding.

  Moreover, the slide side 1st engagement convex part 52 and the slide side 2nd engagement convex which are provided in the slide side extension wall 21 and can prevent the inclination displacement (outward fall) to the outer side of the short side wall part 4 are prevented. The short side that can effectively prevent tilting displacement of the short side wall 4 regardless of whether the development side extended wall 41 of the short side wall 4 is in the reference position or the extended position. The upper part of the side wall 4 can be supported. In particular, since the deployment side extension wall 41 of the short side wall portion 4 is provided so as to be rotatable with respect to the deployment side base wall 31, the first slide side extension wall 41 is in the state where the deployment side extension wall 41 is in the extension position. By supporting the deployment side extension wall 41 by the engaging convex portion 52, flapping or the like of the deployment side extension wall 41 can be more reliably prevented. Furthermore, when the force to the container outer peripheral side is applied to the deployment side extension wall 41 in the extension position, the deployment side extension wall 41 can be supported by the slide side first engagement convex portion 52. Damage to the connecting portion (the extending hinge 43 and the bearing portion 37) between the developing base wall 31 and the developing extending wall 41 can be suppressed. Further, for example, the long side engagement portion 51 for when the development side extension wall 41 of the short side wall portion 4 is in the reference position and the long side side relation for when the development side extension wall 41 is in the extension position. Compared with the case where the joint portion 51 is provided separately, the configuration can be simplified, and the productivity can be improved, the cost can be reduced, and the like.

  Further, the short side wall portion 4 is configured such that the development side extension wall 41 can be folded (accommodated) on the inner surface side of the development side base wall 31, so that the development side extension wall 41 has a reference position and an extension position. In either case, the locking piece 71 only prevents the tilting displacement (inward tilting) to the inside of the deployment side extension wall 41, and does not directly prevent the tilting displacement of the deployment side base wall 31. The tilting displacement of the entire short side wall portion 4 can be reliably prevented. In addition, the locking piece 71 is provided on the slide-side extension wall 21, and the expansion side extension is performed by the same locking piece 71 regardless of whether the development-side extension wall 41 and the slide-side extension wall 21 are in the reference position or the extension position. The inner side surface of the wall 41 is supported to prevent the short side wall portion 4 from falling down. Accordingly, the configuration is simpler than the case where the locking piece for when the deployment side extension wall 41 is in the reference position and the locking piece for when the deployment side extension wall 41 is in the extension position are provided separately. To improve productivity, reduce costs, and the like.

  In addition, since the expansion side wall 41 is supported by the locking piece 71 to prevent the short side wall portion 4 from falling down, the situation where the expansion side wall 41 flutters is prevented. In addition, it is possible to support the upper side portion of the short side wall portion 4 that can effectively prevent the tilt side displacement of the short side wall portion 4 in a state where the development side extended wall 41 is in the extended position. it can. Further, an operation for bending the short side wall portion 4 in the standing position to the inside (the locking piece 71 is bent) regardless of whether the deployment side extension wall 41 is in the reference position or the extension position. Therefore, the operator can fold the folding container 1 relatively smoothly without being confused by the operation method.

  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 said embodiment, the structure for preventing the relative displacement with the long side wall part 3 and the short side wall part 4 in the assembly state of the folding container 1, More specifically, a short side wall part 4 for preventing the tilting displacement toward the outside of 4, the configuration for preventing the tilting displacement toward the inside of the short side wall 4, and the sliding of the slide side extension wall 21 of the long side wall 3. There is no particular limitation on the configuration for preventing it. Hereinafter, another exemplary embodiment will be described with reference to FIGS. For convenience, the illustration of the long side wall 3 located on the front side of the paper is omitted in FIGS. 15 to 17 and FIG. 19, and the illustration of the long side wall 3 located on the back side of the paper is shown in FIG. Is omitted.

  The folding container 1 shown in FIGS. 15, 16, etc. is provided with a lock mechanism for preventing the short side wall portion 4 from falling down in place of the locking piece 71 being omitted. The locking mechanism is provided in the vicinity of both left and right side portions of the deployment side extension wall 41, and is configured to be able to protrude and retract from the side surface of the deployment side extension wall 41, and the slide piece 82 of the slide side extension wall 21. And a lock hole 83 (see FIG. 16, FIG. 21, etc.) formed at a position corresponding to.

  As shown in FIG. 20 and the like, the development side extension wall 41 is formed with a slide accommodating portion 91 that is configured to accommodate the slide piece 82 and that allows the slide piece 82 to slide in the left-right direction. The slide accommodating portion 91 includes an operation corresponding portion 92 that penetrates in the thickness direction of the expansion side extending wall 41, and a communication portion 93 that allows the operation corresponding portion 92 and the side surface of the expansion side extending wall 41 to communicate with each other. The slide accommodating portion 91 is formed at the center in the height direction of the development side extending wall 41 (the extending wall main body 42), and the distance from the operation corresponding portion 92 to the upper side portion of the extending wall main body 42 and the operation corresponding portion 92. It is comprised so that the distance from the extending wall main body 42 to the lower side part may become the same.

  The slide piece 82 has a substantially rectangular plate shape, and includes an operation portion 85 in which a portion including the central portions of both front and back surfaces is formed one step lower, and an action portion 86 that protrudes laterally from a side portion of the operation portion 85. ing. Slide ribs 87 are provided on the upper surface and the lower surface of the operation portion 85, and are inserted into slide grooves 94 formed on the upper edge portion and the lower edge portion of the operation corresponding portion 92 of the slide accommodating portion 91, respectively. The slide operation of the slide piece 82 is guided while preventing the slide piece 82 from falling off the slide accommodating portion 91.

  In addition, the slide piece 82 has a release position (see FIG. 16 and the like) in which the entire action portion 86 is accommodated inside the slide accommodating portion 91 (does not protrude from the side portion of the deployment side extension wall 41), and a tip portion of the action portion 86 Is configured to be displaceable between a locking position (see FIG. 15 and the like) protruding from the side portion of the development side extension wall 41. Then, after the long side wall portion 3 is erected, the short side wall portion 4 is erected and the slide piece 82 is displaced to the lock position, so that the action portion 86 of the slide piece 82 becomes the slide side extension wall. 21 is inserted into the lock hole 83 (see FIG. 21). This prevents the short side wall portion 4 from falling inward, and prevents the short side wall portion 4 from falling outward and sliding displacement of the slide side extension wall 21.

  As shown in FIGS. 17, 18, etc., in this embodiment, when the deployment side extension wall 41 of the deployment side base wall 31 is at the reference position, the operation unit 85 (the slide storage unit 91 of the slide storage unit 91 is operated). An operation opening 96 penetrating in the thickness direction of the development-side base wall 31 is formed at a portion facing the operation corresponding portion 92). For this reason, even if the expansion | extension side expansion wall 41 exists in the state in a reference position, the slide piece 82 can be operated from the outer surface side of the short side wall part 4, and workability | operativity can be aimed at.

  In the example of the above (a), the slide piece 82 is inserted into the lock hole 83 to prevent the short side wall 4 from falling inward, and the short side wall 4 can be tilted outside. Further, sliding displacement of the slide side extension wall 21 can be prevented. For this reason, it is also possible to omit the long side engaging part 51 and the short side engaging part 61. However, when an outward force is applied to the short side wall portion 4 from the article accommodated or when the long side wall portion 3 is grasped and lifted while the article is accommodated, the slide piece 82 is used. In addition, it is desirable to provide the long side engaging portion 51 and the short side engaging portion 61 so that the burden on the lock hole 83 does not become too large (in order to reduce the risk of damage). In particular, when the short side wall portion 4 is displaced to the standing position, a configuration for preventing the short side wall portion 4 from falling down to position the short side wall portion 4 in the vicinity of the upper side portion. It is desirable to provide (a configuration in which the locking wall portion 57 provided on the long side wall portion 3 supports the outer surface side of the short side wall portion 4).

  In the above-described embodiment (a), a configuration may be provided in which the slide piece 82 can be held (simplely) in the lock position and the release position. For example, the base part of the action part 86 is made slightly thicker than the tip part side, and the slide part 82 is displaced to the lock position so that the root part of the action part 86 is press-fitted into the communication part 93. Also good. Further, for example, the groove width of the portion of the slide groove 94 formed in the operation corresponding portion 92 on the side portion in the horizontal width direction of the slide side extension wall 21 may be narrower than other portions.

  In addition, the slide accommodating portion 91 in the above-described embodiment (a) opens to the inner side surface when the development side extension wall 41 is in the reference position and the outer side surface when the development side extension wall 41 is in the extension position. It opens not only on the opposite side but also on the former side. Moreover, you may abbreviate | omit the operation opening part 96 of the expansion | deployment side base wall 31. FIG. In this case, it is possible to avoid a situation in which an object is caught in the operation opening 96 or dust or the like enters from the outside through the operation opening 96.

  (B) In the above embodiment, the short side wall portion 4 expands (expands when the expansion side expansion wall 41 rotates) and expands when the long side wall portion 3 slides. Although it is configured, the long side wall portion 3 may be extended to expand and the short side wall portion 4 may be extended to slide. However, from the standpoints of rotating operability when the side wall portion that extends by being deployed and laying down is laid, and simplification of the configuration for preventing overturning, etc. It is desirable that the pair of side wall portions be folded before the remaining pair of side wall portions.

  (C) Moreover, in the said embodiment, when the folding container 1 is made into a folded state, the height position of the short side wall parts 4 and the height position of the long side wall parts 3 are aligned respectively. (The upper sides are opposed to each other), but the other short side wall 4 overlaps the upper side of one short side wall 4 or the upper side of one long side side wall 3 Alternatively, the other long side wall 3 may overlap. For example, the height when the slide side extension wall 21 is used as the reference position is configured to be slightly shorter than the distance between the pair of long side wall portions 3, and the height of the long side wall portion 3 is a pair of The folding container 1 which can be assembled in the box shape which becomes longer than the distance between the long side wall parts 3 can be obtained.

  In addition, the present invention can be applied to a folding container in which the bottom wall portion 2 is configured in a substantially square plate shape, or the lateral widths of all the side wall portions are configured to be substantially the same. In the above-described embodiment, the short side wall portion 4 is configured to be folded in two by the two deployment side base walls 31 and the deployment side extension wall 41, but the wall portion further rotates relative to the deployment side extension wall 41. It may be configured in three or more folds, such as being movably attached.

  (D) In the above-described embodiment, the development side extension wall 41 of the short side wall portion 4 is configured to be folded (accommodated) to the inner surface side of the development side base wall 31. May be configured to be folded to the outer surface side of the deployment-side base wall 31. Further, when such a configuration is adopted, the locking piece 71 may be configured to be in contact with and supported by the inner side surface of the deployment side extension wall 41 in the extension position, as in the above-described embodiment. You may comprise so that it may contact | abut and support the outer surface of the expansion | extension side expansion | extension wall 41 in a position. However, when the former configuration is adopted, it is necessary to displace the deployment side extension wall 41 to the extension position before the short side wall portion 4 (deployment side base wall 31) is completely raised, and the latter configuration. , The short side wall portion 4 (deployment side base wall 31) is displaced to the standing position side to some extent so that the development side extension wall 41 can be hidden outside the locking piece 71. Later, it is necessary to displace the development side extension wall 41 to the extension position.

  Thus, when adopting a configuration in which the deployment side extension wall 41 is folded on the outer surface side of the deployment side base wall 31, if the procedure for extending the deployment side extension wall 41 is mistaken, the deployment side extension wall 41 is extended. Therefore, it is desirable to adopt a configuration in which the deployment side extension wall 41 is folded to the inner surface side of the deployment side base wall 31 regardless of the procedure as in the above embodiment. Further, when adopting a configuration in which the deployment side extension wall 41 is folded to the outer surface side of the deployment side base wall 31, only the inner surface side of the deployment side extension wall 41 is supported as in the above-described embodiment, so If only a force is applied to the short side wall portion 4 from the outside inward, it will be bent at the connecting portion between the development side base wall 31 and the development side extension wall 41, and the inward fall will be prevented. Since there is a possibility that it will occur, a configuration for preventing the expansion-side base wall 31 from falling down must be added. Therefore, it is desirable to employ a configuration in which the deployment side extension wall 41 is folded on the inner surface side of the deployment side base wall 31 as in the above embodiment.

  By the way, when paying attention only to operability, it is also conceivable that the side wall portion is configured to be slidable and extendable, rather than the configuration in which the wall portion provided so as to rotate is expanded upward. However, when both the long side wall portion 3 and the short side wall portion 4 are configured to be slidable and extendable, various problems such as the necessity of separately providing a relatively sturdy configuration for preventing sliding may occur. Will occur. Therefore, as in the above-described embodiment, it is configured to have both a side wall that can be expanded and contracted by sliding and a side wall that can expand and contract by including a side wall that rotates along the upper side without sliding. Is desirable.

  (E) In the said embodiment, it is good also as providing the simple holding means which can hold | maintain the slide side expansion | extension wall 21 in an expansion | extension position simply at the position. In this case, the assembly workability and folding workability of the folding container 1 can be further improved. In a state where the short side wall 4 is not in the standing position, by applying a force of a predetermined strength downward to the slide side extension wall 21 that is simply held in the extension position by the simple holding means, The slide side extending wall 21 is configured to be displaced to the reference position side. As an example, for example, when the width of the lower end portion of the guide hole 25 is configured to be relatively small and the slide-side extending wall 21 is displaced to the extended position, the rivet 26 is press-fitted into the lower end portion of the guide hole 25. You may comprise as follows. Further, for example, when the width of the lower end portion of the guide rail 24 is configured to be relatively large and the slide side extension wall 21 is displaced to the extension position, the lower end portion of the guide rail 24 is press-fitted inside the guide recess 17. You may comprise as follows.

  (F) In the embodiment described above, by providing the extension interlocking means capable of displacing the slide side extension wall 21 to the extension position by rotating the deployment side extension wall 41 to the extension position. It is good. In this case, the pair of slide-side extension walls 21 can be slid to the extension position only by rotating the deployment-side extension wall 41 to the extension position, thereby improving the workability during assembly work. More can be achieved. As an example, for example, a guide rib protruding from the inner surface along both sides of the upper side portion of the slide side extension wall 21 is provided, and the development side extension wall 41 of the short side wall portion 4 is rotated from the reference position to the extension position. When displacing, the development side extension wall 41 may be slidably in contact with the lower surface of the guide rib, and the slide side extension wall 21 may be lifted accordingly.

  (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.

  (H) In the above embodiment, the rivet 26 is used. However, a projection similar to the rivet 26 or equivalent to the rivet 26 may be integrally formed on the side surface of the main body 12.

  DESCRIPTION OF SYMBOLS 1 ... Folding container, 2 ... Bottom wall part, 3 ... Long side wall part, 4 ... Short side wall part, 11 ... Slide side base wall, 21 ... Slide side extension wall, 31 ... Deployment side base wall, 41 ... Deployment side extension wall 52... Slide side first engagement convex portion 53. Slide side second engagement convex portion 57. Locking wall portion 58. Locking hole 63. Base side second engagement portion. 64: base-side third engaging portion, 65: base-side fourth engaging portion, 66: extension-side engaging portion, 67: engaging concave portion, 68: locking projection, 71: locking piece.

Claims (4)

A bottom wall portion having a substantially rectangular plate shape and each side portion of the bottom wall portion are provided corresponding to the side wall portions of the bottom wall portion, and are erected above the bottom wall portion along the side sides of the bottom wall portion. In a folding container comprising a standing position and a side wall configured to be rotatable between a standing position and a sleeping position folded above the bottom wall,
The side wall portions overlap a pair of opposed first side wall portions that are folded so as to overlap with the upper side of the bottom wall portion, and an upper side of the pair of first side wall portions folded on the upper side of the bottom wall portion. A pair of opposing second side wall portions that are folded in this manner,
The second side wall portion is attached to a slide side base wall rotatably attached to the bottom wall portion, and is attached to the slide side base wall so as to be slidable along the height direction of the second side wall portion. And a slide side extending wall,
The slide side extension wall has a reference position relative to the slide side base wall, and an area overlapping the slide side base wall is smaller than that at the reference position, and is in the standing position of the second side wall portion. It is configured to be relatively displaceable to an extended position where the height is higher than when the height is at the reference position,
The first side wall portion is centered on a deployment side base wall rotatably attached to the bottom wall portion, and an axis extending along the upper side portion of the deployment side base wall with respect to the deployment side base wall. A deployment-side extension wall that is pivotally attached;
The deployment side extension wall is displaced from the deployment side base wall by a reference position provided in parallel with the deployment side base wall and by approximately 180 degrees from the state at the reference position. It extends upward from the upper side, and is configured to be relatively displaceable to an extended position where the height when the first side wall is in the standing position is higher than when it is at the reference position. A folding container. Comprising a slide preventing means for preventing sliding displacement of the slide side extension wall;
The slide preventing means includes
A slide side locking portion provided on the slide side extension wall;
A deployment side locking portion provided on the first side wall,
By displacing the second side wall portion to the standing position and further displacing the first side wall portion to the standing position, the slide side locking portion and the unfolding side locking portion are locked, and the slide side The folding container according to claim 1, wherein sliding displacement of the extension wall is prevented. A fall prevention means for preventing tilting displacement to the outside of the first side wall portion in the standing position;
The overturn prevention means is provided at least on the slide side extension wall,
When the folding container is assembled in a box shape with the slide- side extension wall and the deployment-side extension wall in the reference position, the expansion-preventing means provided on the slide-side extension wall causes the deployment to occur. The outer surface side of the side base wall is supported,
When the folding container is assembled in a box shape with the slide- side extension wall and the deployment-side extension wall in the extension position, the expansion-preventing means provided on the slide-side extension wall causes the deployment to occur. 3. The folding container according to claim 1, wherein an outer surface side of the side base wall and an outer surface side of the expansion side extension wall are supported. Comprising inward prevention means for preventing tilting displacement to the inside of the first side wall portion in the standing position,
The deployment side extension wall of the first side wall portion is configured to be arranged side by side on the inner surface side of the deployment side base wall at the reference position,
The inward prevention means prevents the inclining displacement to the inside of the first side wall by preventing the inclining displacement of the first side wall in the standing position to the inside of the development side extension wall. The folding container according to any one of claims 1 to 3.

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