JP6333641B2 - Container stacking engagement structure - Google Patents

Description

  The present invention relates to a container stacking engagement structure between a first container and a plurality of second containers stacked side by side on the first container.

  Conventionally, as this type of container stacking engagement structure, side wall upper surface recesses are provided at the four corners of the upper surface of the first container and the center of the upper surface of the side wall, and two small second containers are arranged side by side on the first container. It is known that the lower surface sub-projections at the lower corners of both the second containers are received in the upper surface recesses of the side walls of the first container when stacked. In addition, an engagement protrusion protrudes from the bottom surface of the central sidewall upper surface recess of the first container side wall, and the engagement protrusion engages with the engagement recess provided on the lower surface sub-projection of each second container. By combining, it prevented that the 2nd container slip | deviated and fell inside the 1st container (for example, refer patent document 1).

Japanese Patent No. 4121517 (FIGS. 1 and 3)

  However, in the conventional container stacking engagement structure described above, the engagement protrusion may be damaged by a load received from the second container. In addition, the second container is placed in an inclined posture on the first container, the two lower surface sub-projections are first placed in the concave portion on the upper side wall in the center of the upper surface of the first container, and then the second container is placed in a horizontal posture and the remaining container When the operation is performed to fit the two lower surface sub-projections into the recesses on the upper surface of the side wall, in the conventional container stacking engagement structure described above, the engaging protrusion is caught on the outer surface of the lower surface sub-projection, and the stacking operation is performed. Sometimes it could not be done smoothly.

  The present invention has been made in view of the above circumstances, and provides a container stacking engagement structure that has higher strength in the container stacking state than before and can smoothly perform container stacking operations. Objective.

In order to achieve the above object, the container stacking engagement structure according to the invention of claim 1 includes a box-shaped first container having an open upper surface and a plurality of containers that can be stacked side by side on the first container. A container stacking engagement structure between two containers, a lower surface main protrusion projecting from a region inside the lower surface outer edge of the second container, and a lower surface sub projecting from four corners of the lower surface outer edge of the second container In the container stacking engagement structure having a protrusion and a plurality of side wall upper surface recesses that are recessed and formed on the upper surface of the side wall of the first container and receive the lower surface sub-projection of the second container, in the longitudinal direction of the intermediate, the two side walls top recess with provided two each lower surface sub projections to be side by side between the two second container on the first container, standing from the bottom wall upper surface recess Engaging ribs extending in the longitudinal direction of the upper surface of the side wall and having at least one end connected to the side wall portion of the concave portion of the upper surface of the side wall are provided. A feature is that an engagement groove that engages with the engagement rib is formed.

  The invention of claim 2 is characterized in that, in the container stacking engagement structure according to claim 1, both end portions of the engaging rib are connected to the side wall portions of the side wall upper surface recess.

According to a third aspect of the present invention, in the container stacking engagement structure according to the first or second aspect , each engagement rib of the two side wall upper surface recesses for each of the two lower surface sub-projections has the two side wall upper surface recesses. Only one end is connected to the partition wall as the partitioning side wall, and the second container is received between the other end of the engagement rib and the side wall opposite to the partition wall, and the bottom surface. It has a feature in that a communication wall is provided to communicate between the sub protrusion and the lower surface main protrusion.

[Invention of Claim 1]
In the container stacking engagement structure according to claim 1, the second container is moved in the first container by the engagement between the engagement rib provided in the recess on the upper surface of the side wall of the first container and the engagement groove provided on the lower surface of the second container. It is possible to prevent the inside of one container from slipping and falling. And since the engaging rib is reinforced by connecting at least one end part to the side wall part of the side wall upper surface recess, the strength in the stacked state of the first and second containers is higher than the conventional one. . Further, since the engaging rib extends in the longitudinal direction of the upper surface of the side wall, the stacking of the engaging rib and the engaging groove is performed when stacking the second container with the inclined posture on the first container. Can be slid in a wet state, and can be stacked smoothly. In addition, since two side wall upper surface recesses are provided for each of the two lower surface sub-projections adjacent to each other between the two second containers on the first container, positioning of the second container on the first container is easy. At the same time, the function of preventing the lateral displacement of the second container is enhanced.

[Invention of claim 2]
In the container stacking engagement structure according to claim 2, since both end portions of the engagement rib are connected to the side wall portion of the side wall upper surface recess, only one end portion of the engagement rib is the side wall portion of the side wall upper surface recess. The strength of the engaging rib is higher than that connected to the first and second containers, and the strength in the stacked state of the first and second containers is also increased.

[Invention of claim 3 ]
According to the container stacking engagement structure of claim 3 , each of the engagement ribs of the two side wall upper surface recesses adjacent to each other is connected to the partition wall only at one end portion. A communication wall that is received between the partition wall and the opposite side wall portion can be provided in the second container so as to communicate between the lower surface sub-projection and the lower surface main projection. Strength can be increased.

The perspective view of the stacking state of the 1st and 2nd container which concerns on one Embodiment of this invention A perspective view of the upper surface side of the first container The perspective view of the 1st container in the middle of being folded or assembled A perspective view of the first container in a folded state Partial perspective view of the first container in the middle of folding the long side wall A perspective view of the lower surface side of the first container Partial perspective view of the lower surface side of the first container Partial perspective view of the upper surface side of the first container Perspective view of stacked first container Perspective view of the upper surface side of the second container The perspective view of the lower surface side of the 2nd container Partial perspective view of the lower surface side of the second container The perspective view in the middle of stacking the 2nd container on the 1st container Partially broken perspective view of second container stacked in first container Partial side sectional view of the first container stacked with the second container The perspective view of the long side wall of the 1st container which concerns on the modification of this invention The perspective view of the long side wall of the 1st container which concerns on the modification of this invention The fragmentary perspective view of the lower surface side of the 2nd container which concerns on the modification of this invention The fragmentary perspective view of the lower surface side of the 2nd container which concerns on the modification of this invention

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows first and second containers 10 and 60 according to the present invention. Both the first and second containers 10 and 60 have a box shape with an open upper surface and a planar shape, for example, a rectangle. Further, the planar shape of the second container 60 is a size obtained by halving the planar shape of the first container 10 at the center in the longitudinal direction, and two second containers 60 are stacked side by side on the first container 10. Can be done. A container stacking engagement structure according to the present invention is provided between the first and second containers 10 and 60.

  First, the structure of the first container 10 will be described. The first container 10 is a so-called folding container. As shown in FIG. 4, the pair of long side walls 21 and 21 are folded around the lower end as shown in FIG. The pair of short side walls 31 and 31 are folded by rotating around the lower end portion to be folded, and the short side walls 31 and 31 and the long side walls 21 and 21 are erected in the reverse order. It will be in an assembly state by doing.

  Further, as shown in FIG. 3, side protrusions 32 project from the both sides of the short side wall 31 of the first container 10 toward the long side walls 21 and 21, and the side protrusions 32 include a plurality of side protrusions 32. A square side engagement hole 33 is formed. On the other hand, on both sides of the outer surface of the long side wall 21, the portions overlapping the side protrusions 32 are depressed by the thickness of the side protrusions 32, and a plurality of side engaging protrusions 23 protruding from the depressed portions are provided. The side engagement hole 33 is engaged.

  Each long side wall 21 is provided with the lock mechanism 17 shown in FIG. The lock mechanism 17 is provided on the side where a pair of lock bars 18, 18 extending from the lateral center portion of the long side wall 21 to the both end portions in the lateral direction are brought closer to each other by operation of the lock operation portion 19. The lock bars 18 and 18 are normally engaged with a lock engaging portion 37 (see FIG. 5) provided inside the side protrusion 32, whereby each long side in an upright state. The side wall 21 is restricted from falling inward. Then, by the operation of the lock operation part 19, the engagement between the lock bars 18, 18 and the lock engagement part 37 is released, and the long side wall 21 can be tilted inward.

  As shown in FIG. 6, a pair of lower surface protrusions 40 and 40 are formed on the lower surface of the first container 10. Specifically, the lower surface of the first container 10 is divided into two half-surface regions R1 and R1 at the center in the longitudinal direction, and as shown in FIG. 7, from the frame-like region R2 along the outer edge of each half-surface region R1. The first lower surface protrusion 41 protrudes from the entire inner portion, the pair of second lower surface protrusions 42, 42 and the pair of third lower surface protrusions 43, 43 protrude from the four corners of the frame-shaped region R2, and these The first to third lower surface protrusions 41, 42, 43 constitute the lower surface protrusion 40.

  The first lower surface protrusion 41 includes an enveloping rib 41A formed along the inner boundary line of the frame-shaped region R2, and a lattice rib 41B extending around the entire inner side of the enclosing rib 41A.

  The pair of second lower surface protrusions 42, 42 are arranged at both ends in the longitudinal direction on the lower surface of the first container 10. Each of the second lower surface protrusions 42 is disposed at a position near the outer edge of the corner of the frame-shaped region R2, and an L-shaped L-shaped wall 42A that covers the corner of the surrounding rib 41A from the side, and an L-shaped wall 42A A pair of inclined ribs 42B and 42B that are in communication between the both end portions and the positions near the corners of the surrounding rib 41A and are inclined away from the corners of the surrounding rib 41A toward the surrounding rib 41A from the L-shaped wall 42A; The reinforcing rib 42C extends on an extension line of the surrounding rib 41A and the lattice rib 41B and communicates between the surrounding rib 41A and the L-shaped wall 42A.

  The pair of third lower surface protrusions 43, 43 are arranged on the center side in the longitudinal direction on the lower surface of the first container 10, and like the second lower surface protrusion 42, the L-shaped wall 43 </ b> A and the pair of inclined ribs 43 </ b> B. , 43B and reinforcing ribs 43C. In addition, an engagement groove 43 </ b> D extending in the lateral direction of the long side wall 21 is located near the first bottom surface protrusion 41 at a portion of the third lower surface protrusion 43 that is directly below the standing long side wall 21. Is formed. The engagement groove 43 </ b> D has a shape in which the lower end portion of the third lower surface protrusion 43 is notched into a square groove shape.

  The entire frame-shaped region R2 excluding the portion sandwiched between the pair of first lower surface protrusions 41, 41 is positioned directly below the long side wall 21 and the short side wall 31 in the standing posture. That is, the first lower surface protrusions 41, 41 formed on the entire inner portion of the lower surface of the first container 10 from the frame-shaped region R <b> 2 are the long side wall 21 and the short side in the standing posture of the lower surface of the first container 10. The structure protrudes from a region directly below the side wall 31.

  As shown in FIG. 2, the first container 10 is provided with upper surface corner recesses 50 at the four upper corners and an upper surface intermediate recess 53 at the center of the upper surface of each long side wall 21. In the present embodiment, the upper surface corner recess 50 and the upper surface intermediate recess 53 correspond to the “side wall upper surface recess” according to the present invention.

  As shown in FIG. 2, the upper surface corner recess 50 has a stepped shape of a substantially L-shaped region extending between the long side wall 21 and the short side wall 31 adjacent to each other at the corners of the four corners of the upper surface of the first container 10. When the first containers 10 and 10 are stacked, the second lower surface protrusion 42 of the upper container 10 is received. Further, as shown in FIG. 8, a part of the long side wall 21 and the short side wall 31 is left as a vertical wall 50W on the outer surface side of the long side wall 21 and the short side wall 31 from the top corner recess 50, A part of the vertical wall 50 </ b> W is configured by the upper end portion of the side protruding piece 32 described above. Furthermore, the upper side corner recess 50 is formed in the long side wall 21 over a position further away from the corner than the portion where the side protrusion 32 overlaps. Further, a corner engaging protrusion 51 protrudes from the bottom surface of the upper surface corner recess 50 in the long side wall 21. The upper surface of the corner engaging protrusion 51 is located below the upper surfaces of the long side wall 21 and the short side wall 31. In addition, two inner surfaces away from the corners of the upper surface corner recess 50 are inclined with respect to the inner surface of the vertical wall 50W so as to be parallel to the inclined ribs 42B and 42B of the second lower surface protrusion 42.

  On the other hand, two upper surface intermediate recesses 53 are provided adjacent to each other at the center in the longitudinal direction on the upper surface of each long side wall 21. Specifically, as shown in FIG. 8, a sidewall upper surface groove extending in the longitudinal direction of the upper surface of the long side wall 21 and recessed in a stepped manner from the upper surface of the long side wall 21 at the center of the upper surface of the long side wall 21. 59 is formed, and the side wall upper surface groove 59 is divided into a pair of upper surface intermediate recesses 53 and 53 by a partition wall 54 at the center in the longitudinal direction. In addition, the inner side surfaces at both ends in the longitudinal direction of the side wall upper surface groove 59 are inclined surfaces 53S that approach the inner side surface of the long side wall 21 as the distance from the partition wall 54 increases. The portion of the side wall upper surface groove 59 left on the inner surface side of the long side wall 21 from the upper surface intermediate recess 53 is the engagement rib 53V according to the present invention. In other words, the engaging rib 53V stands up from the edge of the inner side surface of the long side wall 21 in the bottom surface of the upper surface intermediate recess 53 and extends in the longitudinal direction of the upper surface of the long side wall 21, and both end portions thereof Side wall portions (specifically, a wall portion having an inclined surface 53S and a partition wall 54). The upper surface of the engagement rib 53V is slightly lower than the upper surface of the long side wall 21, and the side surface of the engagement rib 53V on the long side wall 21 side is flush with the inner side surface of the entire long side wall 21. Yes.

  When the first containers 10 and 10 are stacked as shown in FIG. 9, the first lower surface protrusions 41 and 41 (see FIG. 6) of the first container 10 on the upper side are opened on the upper surface of the first container 10 on the lower side. The second lower surface protrusion 42 (see FIG. 6) is received in the upper surface corner recess 50 of the first container 10 on the lower side, and the third lower surface protrusion 43 (see FIG. 7). A portion outside the mating groove 43D is received in each upper surface intermediate recess 53 of the lower first container 10. In addition, the corner engagement protrusion 42D (see FIG. 7) as one recess in which the corner engagement protrusion 51 (see FIG. 8) of the upper surface corner recess 50 is partitioned by the reinforcing rib 42C in the second lower surface protrusion 42. The engagement rib 53V of the upper surface intermediate recess 53 is engaged with the engagement groove 43D of the third lower surface protrusion 43.

  Next, the structure of the 2nd container 60 is demonstrated based on FIGS. As shown in FIG. 10, the second container 60 is also a folding container like the first container 10, and the pair of long side walls 61, 61 are folded after the pair of short side walls 62, 62 are folded. It will be in a folded state by folding. Further, the upper surface corner recesses 64 are formed in the four corners of the upper surface of the second container 60, and the upper surface corner recesses 64 do not have the corner engaging protrusions 51 (see FIG. 8). Except for this, it has the same shape as the upper surface corner recess 50 of the first container 10.

  As shown in FIG. 11, a lower surface main protrusion 68 is formed on the entire bottom surface of the second container 60 except for the outer edge portion, and lower surface sub protrusions 65 are formed at the four corners of the outer edge portion. The lower surface main protrusion 68 includes an encircling rib 68A formed along the inner boundary line of the frame-shaped region R3 that is directly below the long side walls 61 and 61 and the short side walls 62 and 62 of the lower surface of the second container 60. The lattice rib 68B is stretched over the entire inside of the surrounding rib 68A, and has the same shape as the first lower surface protrusion 41 of the first container 10.

  The lower surface sub protrusion 65 has the same shape as the third lower surface protrusion 43 of the first container 10. That is, as shown in FIG. 12, the lower surface sub projection 65 includes an L-shaped L-shaped wall 65A that covers the corner of the surrounding rib 68A from the side, corners of both ends of the L-shaped wall 65A and the surrounding rib 68A. A pair of inclined ribs 65B and 65B, which are in communication with each other, and are inclined away from the corners of the surrounding rib 68A toward the surrounding rib 68A from the L-shaped wall 65A, and the surrounding rib 68A and the lattice rib 68B. The reinforcing rib 65C extends on the extended line and communicates between the surrounding rib 68A and the L-shaped wall 65A. An engagement groove 66 extending in the lateral direction of the short side wall 62 is formed on the lower surface main protrusion 68 side at a portion of the lower surface sub protrusion 65 that is directly below the standing short side wall 62. Yes. The engagement groove 66 has a shape in which the lower end portion of the lower surface sub-projection 65 is notched into a square groove shape.

  Although not shown, when the second containers 60, 60 are stacked, the lower surface main projection 68 of the second container 60 on the upper stage side is fitted inside the upper surface opening of the second container 60 on the lower stage side, The lower surface sub-projection 65 of the upper second container 60 is received in the upper surface corner recess 64 of the lower second container 60.

  The description of the configuration related to the container stacking engagement structure of the first and second containers 10 and 60 of the present embodiment is as described above. Next, the effect of this container stacking engagement structure will be described. In order to stack the second container 60 on the first container 10, for example, the second container 60 is placed in the upper surface intermediate recesses 53, 53 of the first container 10 with the second container 60 tilted as shown in FIG. 13. The lower surface sub-projections 65 and 65 at one end in the short direction are housed. At this time, the engagement ribs 53V and 53V of the upper surface intermediate recess 53 and the engagement grooves 66 and 66 of the lower surface sub-projections 65 and 65 are engaged with each other, so that the lower end of the second container 60 is moved along the engagement rib 53V. The second container 60 can be moved to a position where the outer surface of the lower surface sub projection 65 abuts against the partition wall 54 while sliding the portion. When the second container 60 is set in a horizontal posture, the lower surface sub-projections 65 at the lower corners of the second container 60 are accommodated in the upper surface intermediate recess 53 and the upper surface corner recess 50 of the first container 10. The engagement protrusion 51 is engaged with a corner engagement recess 65D (see FIG. 12) as one recess partitioned by the reinforcing rib 65C among the lower surface sub protrusions 65. As shown in FIGS. 14 and 15, the engagement rib 53 </ b> V of the upper surface intermediate recess 53 is engaged with the engagement groove 66 of the lower surface sub projection 65. Next, another second container 60 is stacked on the remaining half of the first container 10, and thereby, as shown in FIG. 1, two second containers 60, 60 are placed on the first container 10. Will be stacked side by side.

  In addition, another first container 10 can be stacked on the two second containers 60, 60 stacked in a side-by-side state, and in this case, each first lower surface protrusion on the lower surface of the first container 10. 41 is received inside the upper surface opening of each second container 60.

  By the way, when the second container 60 is mounted on the first container 10 in a stacked state and transported, a lateral load acts between the second container 60 and the first container 10 during acceleration / deceleration. In addition, when a large amount of luggage is stored in the first container 10, a load that causes the long side wall 21 and the short side wall 31 of the first container 10 to swell laterally may be applied. When the lower surface sub projection 65 of the second container 60 is displaced from the upper surface intermediate recess 53 to the inside of the first container 10 due to these loads, the second container 60 falls into the first container 10 and the load collapses.

  However, in the container stacking engagement structure of this embodiment, the engagement rib 53V provided in the upper surface intermediate recess 53 of the first container 10 and the engagement groove 66 provided on the lower surface of the second container 60 are engaged. Thus, it is possible to prevent the second container 60 from slipping and falling inside the first container 10. Since the engaging rib 53V is reinforced by connecting both end portions to the side wall portion of the upper surface intermediate recess 53, the strength of the first and second containers 10 and 60 in the stacked state is increased. It becomes higher than before.

  Moreover, since the engaging rib 53V extends in the longitudinal direction of the upper surface of the long side wall 21, when the second container 60 is placed in an inclined posture on the first container 10 and stacked, The mating rib 53V and the engaging groove 66 can be slid in an engaged state, and the stacking operation can be performed smoothly. Further, the two upper surface intermediate recesses 53, 53 adjacent to the first container 10 are partitioned by the partition wall 54, so that the first contact is caused by the contact between the partition wall 54 and the lower surface sub projection 65 of the second container 60. The lateral displacement of the second container 60 in the longitudinal direction of the container 10 can be restricted, and the positioning of the second container 60 during the stacking operation can be easily performed.

[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 above-described embodiment, an example in which two second containers 60 are stacked side by side on the first container 10 has been described. However, three or more second containers are stacked side by side on the first container. The present invention may be applied to a container stacking engagement structure.

  (2) Although the upper surface intermediate recesses 53 and 53 that are arranged side by side in the first container 10 of the embodiment are partitioned by the partition wall 54, as shown in FIG. The partition wall 54 between the recesses 53 and 53 is eliminated, and one upper surface center recess 53H is provided for each of the two lower surface sub-projections 65 and 65 at the center of the upper surface of each long side wall 21 (that is, You may make it the structure provided with the recessed part) "). By doing so, since the two lower surface sub-projections 65, 65 are received in the common upper surface intermediate recess 53H, the second container 60 is inclined on the first container 10, and the lower surface sub-projection is formed in the upper surface intermediate recess 53H. The operation of retracting the protrusion 65 is facilitated.

  (3) In the first container 10 of the above embodiment, the upper surface of the partition wall 54 that partitions the upper surface intermediate recesses 53, 53 is flush with the entire upper surface of the long side wall 21, but FIG. As shown, the upper surface of the partition wall 54A may be lower than the upper surface of the entire long side wall 21, or although not shown, the partition wall may be a triangular rib connected to the engagement rib.

  (4) Although the engaging rib 53V of the above embodiment is lower than the entire upper surface of the long side wall 21, the upper surface of the engaging rib 53V may be flush with the entire upper surface of the long side wall 21. . However, by lowering the upper surface of the engagement rib 53V from the entire upper surface of the long side wall 21 as in the above-described embodiment, the second container 60 has a space between the lower surface sub projection 65 and the lower surface main projection 68. A low rib to be connected (see FIG. 12) can be provided, and the strength of the lower surface sub projection 65 can be increased.

  (5) As shown in FIG. 17 (A), the engaging rib 53V is connected to only the partition wall 54, and conversely, as shown in FIG. May be connected to only the side wall portion of the upper surface intermediate recess 53 on the side opposite to the partition wall 54. According to these structures, as shown in FIGS. 18 and 19, the inclined rib 65 </ b> B and the L-shaped wall 65 </ b> A that connect the lower surface sub projection 65 and the lower surface main projection 68 on one end side of the engagement groove 66 are provided. It can be left as a “communication wall” according to the present invention, and the strength of the lower surface sub projection 65 can be increased.

10 First container 21 Long side wall 31 Short side wall 50 Upper surface corner recess 53, 53H Upper surface intermediate recess (side wall upper surface recess)
53V Engagement rib 54, 54A Partition wall 60 Second container 61 Long side wall 62 Short side wall 65 Lower surface sub projection 66 Engagement groove 68 Lower surface main projection

Claims (3)

A container stacking engagement structure between a box-shaped first container having an open upper surface and a second container that can be stacked side by side on the first container,
A lower surface main protrusion protruding from a region inside the lower surface outer edge of the second container;
A lower surface sub-projection projecting from the four corners of the lower surface outer edge of the second container;
In the container stacking engagement structure having a plurality of side wall upper surface recesses that are recessed in the upper surface of the side wall of the first container and receive the lower surface sub projection of the second container,
In the middle in the longitudinal direction on the upper surface of the side wall of the first container, there are provided two recesses on the upper surface of the side wall for each of the two lower surface sub-projections adjacent to each other between the two second containers on the first container. together is, the longitudinally extending side wall top surface stands up from the bottom of the side wall top surface recess, at least one end portion is connected engaging rib is provided on the side wall portion of the side wall top surface recess,
A container stacking engagement structure, wherein an engagement groove that engages with the engagement rib is formed between the lower surface sub-projection or the lower surface sub-projection and the lower surface main projection.   2. The container stacking engagement structure according to claim 1, wherein both end portions of the engagement rib are connected to side wall portions of the side wall upper surface recess. Each of the engagement ribs of the two side wall upper surface recesses for each of the two lower surface sub-projections is connected at only one end to a partition wall as a side wall portion that partitions the two side wall upper surface recesses,
The second container is received between the other end of the engagement rib and the side wall opposite to the partition wall, and between the lower surface sub-projection and the lower surface main projection. The container stacking engagement structure according to claim 1, wherein a communication wall for communication is provided .

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