container

Abstract

To increase the inner capacity of a container while maintaining the function that opens and closes the lateral opening of the container body.SOLUTION: A container (10) includes a door member (28) that opens and closes a lateral opening part (SA) on a container body (12). A guide groove (30) that vertically guides each side edge part of the door member (28) is formed from each side edge part of the lateral opening (SA) on the container body (12) to the upper edge part of the container body (12). An engaging groove (32) that can be engaged with the bottom edge part of the door member (28) is formed at the bottom edge part of the lateral opening part (SA) on the container body (12). A bottom wall part (14) of the container body (12) has an inclined bottom wall part (16s), which is inclined against the horizontal direction so as to lower as it becomes distant from the lateral opening part (SA), on the side of the bottom edge part of the lateral opening part (SA).SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a container for housing an item. [Background technology]

[0002] A container used for transporting (carrying) or storing an article in a logistics system includes a box-shaped container body. The container body has a bottom wall portion that is rectangular in plan view, side walls rising from a pair of opposing sides of the bottom wall portion, an upper opening portion that is open at the top, and a side opening portion that is open at least one side. The container described in Patent Document 1 also includes a door member that opens and closes the container body. A guide groove that guides each side end portion of the door member in the up-down direction is formed on the upper side of each side edge of the side opening portion (discharge opening portion in Patent Document 1). A plurality of engagement recesses (locking recesses in Patent Document 1) recessed downward are formed at intervals in the horizontal direction on the lower edge portion of the side opening portion of the container body. A plurality of engagement protrusions (locking protrusions in Patent Document 1) protruding downward are formed at intervals in the horizontal direction on the lower end portion of the door member, and each engagement protrusion can be engaged with each engagement recess of the container body (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2010-137892 A Summary of the Invention [Problem to be solved by the invention]

[0004] In recent years, there has been a demand for expanding the volume of a container to increase the content amount of the container while still ensuring the ability to open and close the side opening of the container body, as in the container described in Patent Document 1.

[0005] Therefore, an object of one aspect of the present invention is to increase the internal volume of a container while ensuring the function of opening and closing the side opening of the container body. [Means for solving the problem]

[0006] A container according to one embodiment of the present invention comprises a container body having a bottom wall portion that is rectangular in a plan view, side wall portions rising from a pair of opposing edges of the bottom wall portion, an upper opening that is open at an upper side, and a side opening that is open on at least one side, and a door member that opens and closes the side opening of the container body, wherein guide grooves that guide each side end of the door member in a vertical direction are formed from each side edge of the side opening of the container body to the upper end of the container body, an engagement groove that can engage with the lower end of the door member is formed at the lower edge of the side opening of the container body, and the bottom wall portion has a bottom wall inclined portion on the lower edge side of the side opening that is inclined relative to the horizontal direction so as to become lower as it moves away from the side opening inward.

[0007] According to the above configuration, as described above, the guide grooves that guide each side end of the door member in the up-down direction are formed from each side edge of the side opening of the container body to the upper end of the container body. The engagement grooves that can engage with the lower end of the door member are formed at the lower edge of the side opening of the container body. Therefore, the side opening of the container body can be opened and closed by the vertical movement of the door member. In other words, the container can ensure the function of opening and closing the side opening of the container body.

[0008] In addition, since the bottom wall has the inclined bottom wall portion on the lower edge side of the side opening, the upper surface (placing surface) of most of the bottom wall excluding the inclined bottom wall portion can be lowered by the inclination amount of the inclined bottom wall portion, thereby expanding the volume of the container and increasing the content amount of the container.

[0009] In a container according to one embodiment of the present invention, the container body has a connecting wall portion formed above the side opening and connecting one side ends of a pair of the side wall portions, a bulge portion bulging outward is formed on the upper end side of the door member, the bulge portion has a handle portion at its upper portion, and a locking projection capable of engaging with the lower end of the connecting wall portion is formed on the outer surface of the bulge portion, and the door member is configured so that when the side opening of the container body is closed, the locking projection engages with the lower end of the connecting wall portion.

[0010] According to the above configuration, as described above, the door member is configured so that the locking protrusion locks with the lower end of the connecting wall portion when the side opening of the container body is closed, thereby preventing the door member from unintentionally opening the side opening of the container body or from coming off the container body.

[0011] In addition, since the bulge has the handle portion at its upper part, the locked state of the locking protrusion can be easily released by placing a hand on the handle portion and pulling the upper part of the door member inward.

[0012] In the container according to one aspect of the present invention, the bulging portion may have a bulging inclined portion inclined with respect to the horizontal direction below the locking projection.

[0013] According to the above-mentioned configuration, when the door member is attached to the container body, the locking projection is guided to the inside of the connecting wall portion by the bulging inclined portion, which makes it easy to attach the door member to the container body.

[0014] In the container according to one aspect of the present invention, a gripping portion may be formed on the handle portion of the bulging portion on a side farther from the connecting wall portion.

[0015] According to the above configuration, the locked state of the locking projection can be easily released by manually gripping the knob portion and pulling the upper portion of the door member inward.

[0016] In a container according to one embodiment of the present invention, an outer flange portion protruding outward is formed on the outer edge of the engagement groove of the container body, a lower flange portion protruding downward is formed at the tip of the outer flange portion, and a lower fitting portion capable of fitting into an upper opening of a lower-tier container is formed below the lower flange portion.

[0017] According to the above-mentioned configuration, the containers can be stacked on top of each other, and the side opening of the main body of the inclined bottom portion can be reinforced when stacked. Also, the containers can be stacked on top of each other, and the content volume of the container can be increased by the inclination amount of the inclined bottom wall portion when stacked.

[0018] In the container according to one aspect of the present invention, an outer edge of the engagement groove of the container body may be located at a higher height position than an inner edge of the engagement groove.

[0019] According to the above-mentioned configuration, it is possible to effectively disperse the impact that the door element receives from the article during the transportation of the article.

[0020] In a container according to one embodiment of the present invention, each side end of the door member has three abutment surfaces capable of abutting against three inner wall surfaces of the guide groove of the container body, and the three abutment surfaces of the door member and the three inner wall surfaces of the guide groove of the container body may each be set to the same gradient.

[0021] According to the above-mentioned configuration, the attachment state of the door member to the container body is stable. Effect of the Invention

[0022] According to one aspect of the present invention, the capacity of the container can be increased while ensuring the function of opening and closing the side opening of the container body. [Brief description of the drawings]

[0023] [Figure 1] FIG. 2 is a perspective view of a container according to the present embodiment. [Diagram 2] FIG. 2 is a vertical cross-sectional view of the container shown in FIG. [Diagram 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. [Figure 4] 2 is a partially cutaway perspective view of the container shown in FIG. 1 on the door member side. FIG. [Diagram 5] FIG. 3 is an enlarged view of a portion V in FIG. [Figure 6] FIG. 4 is an enlarged view of a portion VI in FIG. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the specification and claims of this application, the horizontal direction refers to the horizontal direction of the container or container body, and is one of the horizontal directions. The vertical direction refers to the vertical direction of the container or container body, and is one of the horizontal directions perpendicular to the horizontal direction. The height direction refers to the height direction of the container or container body, and is the vertical direction (up and down direction). The outward direction refers to the direction toward the outside of the container or container body, and the inward direction refers to the direction toward the inside of the container or container body. The rectangular shape is not limited to a strict rectangular shape, and includes a shape that can be visually recognized as a rectangular shape overall, even if the corners are curved, for example. Unless otherwise specified, the configuration of the shape of the door member is based on the state in which the door member closes the side opening of the container body. In the drawings, "CD" indicates the horizontal direction, "LD" indicates the vertical direction, and "HD" indicates the height direction.

[0025] (Overview of container 10) 1 to 3, a container 10 according to this embodiment is a container for storing an article, and is used, for example, in a logistics system for transporting (carrying) or storing the article. The container 10 extends in the vertical direction, and the longitudinal direction of the container 10 is the vertical direction.

[0026] (Overview of container body 12) 1, the container 10 includes a box-shaped container body 12, which is made of a resin such as polypropylene and is formed by injection molding. The material of the container body 12 is not limited to resin, and may be a metal such as aluminum. The method of manufacturing the container body 12 is not limited to injection molding, and may be a manufacturing method other than injection molding.

[0027] (Bottom wall portion 14) 1 to 3, the container body 12 has a bottom wall portion 14 that is rectangular in plan view and that supports an article, and the bottom wall portion 14 extends in the vertical direction. The bottom wall portion 14 has a bottom plate portion 16 that is rectangular in plan view, a plurality of first bottom surface ribs 18 formed at intervals in the horizontal direction on the lower surface of the bottom plate portion 16, and a plurality of second bottom surface ribs 20 formed at intervals in the vertical direction on the lower surface of the bottom plate portion 16. Each of the first bottom surface ribs 18 extends in the vertical direction, and each of the second bottom surface ribs 20 extends in the horizontal direction.

[0028] (Side wall 22, upper opening UA, side openings SA, LA) As shown in Figs. 1 to 4, the container body 12 has side walls (first side walls) 22 rising from a pair of laterally opposing sides of the bottom wall 14. The pair of side walls 22 are laterally opposing, and each side wall 22 extends vertically. The container body 12 also has an upper opening UA that opens upward, a side opening SA that opens on one vertical side, and a side opening LA that opens on the other vertical side. The side opening LA of the container body 12 is connected to the upper opening UA. Note that the container body 12 does not need to have the other side opening LA as long as it has one side opening SA.

[0029] (Structure section 24, low wall section 26) 1, 2, and 4, the container body 12 has a crosspiece 24 formed above the side opening SA as a connecting wall. The crosspiece 24 extends in the horizontal direction and connects one side ends of the pair of side walls 22. The container body 12 also has a bottom wall 26 rising from the side opening LA side of the bottom wall 14, and the bottom wall 26 is located below the side opening LA of the container body 12. The bottom wall 26 extends in the horizontal direction and connects the other side ends of the pair of side walls 22.

[0030] (Outline of door component 28) 1 and 4, the container 10 is provided with a rectangular door member 28 that opens and closes a side opening SA of the container body 12. The door member 28 extends in the lateral direction and is configured to be detachable from the container body 12. The door member 28 is made of a resin such as polypropylene, and is formed by injection molding. The material of the door member 28 is not limited to resin, and may be a metal such as aluminum. The manufacturing method of the door member 28 is not limited to injection molding, and may be a manufacturing method other than injection molding.

[0031] (Guide groove 30, engagement groove 32) As shown in Figs. 3 to 7, guide grooves 30 are formed from each side wall portion 22 in the lateral direction of the side opening SA of the container body 12 to the upper end of the container body 12 to guide each side end of the lateral direction of the door member 28 in the up-down direction (height direction). Each guide groove 30 extends in the up-down direction, and the height dimension of each guide groove 30 is set to be larger than the height dimension of the door member 28. In addition, an engagement groove 32 that can engage with the lower end of the door member 28 is formed at the lower edge of the side opening SA of the container body 12. The engagement groove 32 extends in the lateral direction, and both lateral ends of the engagement groove 32 are connected to the lower end of the guide groove 30. The outer edge portion 32e of the engagement groove 32 of the container body 12 is located at a higher height position than the inner edge portion 32i.

[0032] (Bottom wall slope part 16s) As shown in Figures 4 and 5, the bottom plate portion 16 of the bottom wall portion 14 has a bottom wall inclined portion (bottom plate inclined portion) 16s on the lower edge side of the side opening SA, and the bottom wall inclined portion 16s is inclined with respect to the horizontal direction so as to become lower as it moves inward from the side opening SA. This allows the upper surface (placing surface) of most of the bottom plate portion 16 excluding the bottom wall inclined portion 16s to be lowered by the inclination amount T of the bottom wall inclined portion 16s. Note that the inclination amount T is the height from the upper surface (placing surface) of most of the bottom plate portion 16 to the horizontal direction indicated by the dashed line in the figure, as shown in Figure 5.

[0033] (Outer flange portion 34, lower flange portion 36, lower fitting portion 12f) As shown in Figs. 4, 5, and 7, an outer flange portion 34 protruding outward is formed on the outer edge portion 32e of the engagement groove 32 of the container body 12. A lower flange portion 36 protruding downward is formed at the tip of the outer flange portion 34. A plurality of connecting ribs 38 (only one is shown in the drawings) are formed at intervals in the lateral direction between the outer flange portion 34 and the lower flange portion 36. A lower fitting portion 12f is formed below the lower flange portion 36 of the container body 12, and the lower fitting portion 12f can be fitted into the upper opening UA of the lower container 10 when the containers 10 are stacked. The lower fitting portion 12f of the container body 12 is formed by a portion of the bottom wall portion 14 that is lower than the lower surface of the lower flange portion 36. This makes it possible to reinforce the side opening of the container body 12. In addition, it is possible to stack the containers 10 on top of each other, and to increase the container capacity by an amount corresponding to the inclination amount T of the bottom wall inclined portion 16s when stacked.

[0034] (Side wall recess 40, side wall protrusion 42) As shown in Fig. 1, a sidewall recess 40 recessed downward is formed near the side opening LA at the upper end of each sidewall portion 22. As shown in Figs. 3 and 6, a sidewall protrusion 42 protruding downward is formed near the bottom wall portion 26 at the lower end of each sidewall portion 22. Each sidewall protrusion 42 is disposed at a position overlapping each sidewall recess 40 in a state in which the container 10 is viewed in plan. The multiple containers 10 are configured such that, when stacked, the sidewall protrusion 42 of the upper container 10 fits into the sidewall recess 40 of the lower container 10. This makes it possible to stabilize the stacked state of the multiple containers 10.

[0035] (Characteristic configuration of door member 28) As shown in Figures 4 and 5, a bulging portion 44 that bulges outward is formed in the horizontal center of the upper end side of the door element 28. The bulging portion 44 has a handle portion 44w at its upper portion for hanging on. A gripping portion 46 for holding with the hand is formed at the end of the handle portion 44w of the bulging portion 44 that is farther from the crosspiece 24. In addition, a locking protrusion 48 that can be locked to the lower end of the crosspiece 24 is formed on the outer surface of the bulging portion 44. The bulging portion 44 has a bulging inclined portion 44s below the locking protrusion 48 that is inclined inwardly and downwardly with respect to the horizontal direction.

[0036] Door member 28 is configured such that, when each side end portion is inserted into each guide groove 30 of container body 12, bulge 44 or its periphery elastically deforms inward, while locking projection 48 is guided to the inside of crosspiece 24. Door member 28 is also configured such that, when side opening SA of container body 12 is closed, bulge 44 or its periphery elastically returns outward, and locking projection 48 locks with the lower end portion of crosspiece 24.

[0037] 6 and 7, each side end of the door member 28 has three abutment surfaces 28a, 28b, and 28c that can abut against the three inner wall surfaces 30a, 30b, and 30c of the guide groove 30 of the container body 12. The three abutment surfaces 28a, 28b, and 28c of the door member 28 and the three inner wall surfaces 30a, 30b, and 30c of the guide groove 30 of the container body 12 are each set to the same gradient. This ensures that the door member 28 is attached to the container body 12 in a stable manner. (Support part 50, second side wall part 52, protrusion part 54) 1, 2, 4, and 5, a support portion 50 is formed on the inside of one end of each side wall portion 22, and each support portion 50 extends in the vertical direction from the bottom wall portion 14 to the upper portion of the container body 12. Each support portion 50 has a guide surface 50a for guiding a contained article from inside the container body 12 to the side opening SA side, and the guide surface 50a prevents the contained article from getting caught on the support portion 50 when the article is taken out from the side opening SA side. An inner wall surface 30c of each guide groove 30 is formed in each support portion 50, in other words, the inner wall surface 30c of each guide groove 30 is constituted by a part of each support portion 50. A second side wall portion 52 is formed at one end of each side wall portion 22, and each second side wall portion 52 extends in the up-down direction from the outer flange portion 34 to the batten portion 24. An inner wall surface 30a of each guide groove 30 is formed on each second side wall portion 52. In other words, the inner wall surface 30a of each guide groove 30 is formed by a part of each second side wall portion 52. In addition, a protrusion portion 54 extending in the up-down direction is formed on both ends of the back side (inner side) of the door element 28, and each protrusion portion 54 has a different gradient from the other part of the back side of the door element 28. An abutting surface 28c of each side end of the door element 28 is formed on each protrusion portion 54. In other words, the abutting surface 28c of each side end of the door element 28 is formed by a part of each protrusion portion 54.

[0038] 5, a tapered portion 28t is formed on the outer side (front side) and the inner side (rear side) of the lower end of the door member 28. This allows the lower end of the door member 28 to easily engage with the engagement groove 32 of the container body 12.

[0039] (Effects of this embodiment) Next, the effects of this embodiment will be described.

[0040] Guide grooves 30 are formed from each lateral edge of the side opening SA of the container body 12 to the upper end of the container body 12, for vertically guiding each lateral side end of the door member 28. An engagement groove 32 that can engage with the lower end of the door member 28 is formed at the lower edge of the side opening SA of the container body 12. Therefore, the side opening SA of the container body 12 can be opened and closed by the vertical movement of the door member 28. In other words, the container 10 can ensure the function of opening and closing the side opening SA of the container body 12.

[0041] As described above, the bottom plate portion 16 of the bottom wall portion 14 has the bottom wall inclined portion 16s on the lower edge side of the side opening SA. Therefore, the upper surface (placing surface) of most of the bottom plate portion 16 of the bottom wall portion 14 excluding the bottom wall inclined portion 16s can be lowered by the inclination amount T of the bottom wall inclined portion 16s. This allows the volume of the container 10 to be expanded, and the content amount of the container 10 to be increased.

[0042] That is, according to this embodiment, the capacity of the container 10 can be increased while ensuring the function of opening and closing the side opening SA of the container body 12.

[0043] Moreover, the bottom wall inclined portion 16s can reduce the impact that the door element 28 receives from the article during the transport of the article. More specifically, when an article slides along the bottom wall portion 14 during the transport of the article and hits the door element 28, the force of the article hitting the door element 28 can be reduced by the gradient of the bottom wall inclined portion 16s. Furthermore, since the outer edge portion 32e of the engagement groove 32 of the container body 12 is located at a higher height position than the inner edge portion 32i, the impact that the door element 28 receives from the article during the transport of the article can be effectively dispersed. Therefore, according to this embodiment, damage to the door element 28 during the transport of the article can be prevented.

[0044] Furthermore, when an article is to be removed from the side opening SA of the container body 12, the inclined bottom wall portion 16s can guide the article toward the side opening SA of the container body 12. Therefore, according to this embodiment, the operation of removing the articles contained in the container 10 can be performed efficiently.

[0045] As described above, the bulging portion 44 has the bulging inclined portion 44s below the locking projection 48. Therefore, when each side end of the door member 28 is inserted into each guide groove 30 of the container body 12, the bulging portion 44 or its periphery elastically deforms inward, and the locking projection 48 is guided by the bulging inclined portion 44s to the inside of the rail portion 24. Therefore, according to this embodiment, the door member 28 can be easily attached to the container body 12.

[0046] As described above, the door member 28 is configured such that, when the side opening SA of the container body 12 is closed, the bulge 44 or its periphery elastically returns outward, and the locking protrusion 48 locks with the lower end of the crosspiece 24. This makes it possible to prevent the door member 28 from unintentionally opening the side opening SA of the container body 12 or from coming off the container body 12. Therefore, according to this embodiment, articles are not ejected from the container 10 during transport of the articles, and the articles can be transported stably.

[0047] As described above, the bulging portion 44 has a handle portion 44w for hanging on the upper portion. In addition, a grip portion 46 for gripping with the hand is formed on the end portion of the handle portion 44w of the bulging portion 44 on the side farther from the rail portion 24. Therefore, the locked state of the locking protrusion 48 can be easily released by hanging the handle portion 44w with the hand or gripping the grip portion 46 with the hand and pulling the upper portion of the door member 28 inward. Therefore, according to this embodiment, the door member 28 can easily perform the opening operation of the side opening SA of the container body 12.

[0048] (Other embodiments) Although detailed illustration is omitted, the container body 12 may have side walls rising from a pair of opposite sides in the vertical direction of the bottom wall 14, instead of having side walls 22 rising from a pair of opposite sides in the horizontal direction of the bottom wall 14. In this case, the container body 12 has a side opening (a horizontal side opening) that is open on at least one side in the horizontal direction, instead of two side openings SA, LA that are open on both vertical sides. The container 10 includes a door member that opens and closes a horizontal side opening of the container body 12, instead of the door member 28 that opens and closes the side opening SA of the container body 12.

[0049] Furthermore, the container 10 may be provided with a door member 28 that opens and closes the side opening SA, and may also be provided with another door member that opens and closes the side opening LA. In this case, guide grooves that guide each lateral side end of the other door member in the up-down direction are formed from each lateral side edge of the side opening LA in the container body 12 to the upper end of the container body 12. An engagement groove that can engage with the lower end of the other door member is formed at the lower edge of the side opening LA in the container body 12.

[0050] The other embodiments also provide the same advantageous effects as those of the present embodiment described above.

[0051] [Additional Notes] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention. [Explanation of symbols]

[0052] 10 containers 12 Container body UA upper opening SA side opening LA lateral opening 12f Lower fitting part 14 Bottom wall 16 Bottom plate part 16s Bottom wall slope (bottom plate slope) 18 First bottom rib 20 Second bottom rib 22 Side wall 24 Cross section (connecting wall section) 26 Low wall 28 Door parts 28a Contact surface 28b Contact surface 28c Contact surface 28t tapered section 30 Guide groove 30a Inner wall 30b Inner wall surface 30c inner wall surface 32 Engagement groove 32e outer edge 32i Inner edge 34 Outer flange 36 Lower flange 38 Connecting Rib 40 Side wall recess 42 Side wall protrusion 44 Bulge 44s bulge slope 48 Locking protrusion 50 Support part 52 Second side wall 54 Protrusion

Claims

1. A container body having a bottom wall portion having a rectangular shape in a plan view, side wall portions rising from a pair of opposing sides of the bottom wall portion, an upper opening portion that is open at the top, and a side opening portion that is open at least one side; a door member for opening and closing the side opening of the container body, A guide groove is formed from each side edge of the side opening of the container body to an upper end of the container body to guide each side end of the door member in the up-down direction, and an engagement groove is formed at a lower edge of the side opening of the container body so as to be engageable with the lower end of the door member, the bottom wall portion has a bottom wall inclined portion on a lower edge side of the side opening portion, the bottom wall portion being inclined with respect to a horizontal direction so as to become lower as it goes away inward from the side opening portion, The container body has a connecting wall portion formed above the side opening portion and connecting one side end portions of the pair of side wall portions to each other, a bulge that bulges outward is formed on the upper end side of the door member, the bulge has a handle on its upper part, and a locking protrusion that can be engaged with the lower end of the connecting wall portion is formed on the outer surface of the bulge, and the door member is configured so that when the side opening of the container body is closed, the locking protrusion engages with the lower end of the connecting wall portion.

2. A container body having a bottom wall portion having a rectangular shape in a plan view, side wall portions rising from a pair of opposing sides of the bottom wall portion, an upper opening portion that is open at the top, and a side opening portion that is open on at least one side, a door member for opening and closing the side opening of the container body, A guide groove is formed from each side edge of the side opening of the container body to an upper end of the container body to guide each side end of the door member in the up-down direction, and an engagement groove is formed at a lower edge of the side opening of the container body so as to be engageable with the lower end of the door member, the bottom wall portion has a bottom wall inclined portion on a lower edge side of the side opening portion, the bottom wall portion being inclined with respect to a horizontal direction so as to become lower as it goes away inward from the side opening portion, A container, characterized in that an outer edge of the engagement groove of the container body is located at a higher height position than an inner edge of the engagement groove.

3. A container body having a bottom wall portion having a rectangular shape in a plan view, side wall portions rising from a pair of opposing sides of the bottom wall portion, an upper opening portion that is open at the top, and a side opening portion that is open on at least one side, a door member for opening and closing the side opening of the container body, A guide groove is formed from each side edge of the side opening of the container body to an upper end of the container body to guide each side end of the door member in the up-down direction, and an engagement groove is formed at a lower edge of the side opening of the container body so as to be engageable with the lower end of the door member, the bottom wall portion has a bottom wall inclined portion on a lower edge side of the side opening portion, the bottom wall portion being inclined with respect to a horizontal direction so as to become lower as it goes away inward from the side opening portion, The container body has a connecting wall portion formed above the side opening portion and connecting one side end portions of the pair of side wall portions to each other, The door member has an upper end portion formed with a bulge portion bulging outward, the bulge portion having a handle portion at its upper portion, and a locking projection formed on an outer surface of the bulge portion that can be locked to the lower end portion of the connecting wall portion, The container according to claim 1, wherein the bulge has a bulging inclined portion inclined with respect to the horizontal direction below the locking projection.

4. A container body having a bottom wall portion having a rectangular shape in a plan view, side wall portions rising from a pair of opposing sides of the bottom wall portion, an upper opening portion that is open at the top, and a side opening portion that is open on at least one side, a door member for opening and closing the side opening of the container body, A guide groove is formed from each side edge of the side opening of the container body to an upper end of the container body to guide each side end of the door member in the up-down direction, and an engagement groove is formed at a lower edge of the side opening of the container body so as to be engageable with the lower end of the door member, the bottom wall portion has a bottom wall inclined portion on a lower edge side of the side opening portion, the bottom wall portion being inclined with respect to a horizontal direction so as to become lower as it goes away inward from the side opening portion, The container body has a connecting wall portion formed above the side opening portion and connecting one side end portions of the pair of side wall portions to each other, The door member has an upper end portion formed with a bulge portion bulging outward, the bulge portion having a handle portion at its upper portion, and a locking projection formed on an outer surface of the bulge portion that can be locked to the lower end portion of the connecting wall portion, A container comprising: a gripping portion formed at an end of the handle portion of the bulge portion that is farther from the connecting wall portion.

5. An outer flange portion is formed on an outer edge of the engagement groove of the container body, the outer flange portion protruding outward, and a lower flange portion is formed on a tip end of the outer flange portion, the lower flange portion protruding downward, 5. The container according to claim 1, further comprising a lower fitting portion formed below the lower flange portion, the lower fitting portion being adapted to fit into an upper opening of a lower container.

6. A container body having a bottom wall portion having a rectangular shape in a plan view, side wall portions rising from a pair of opposing sides of the bottom wall portion, an upper opening portion that is open at the top, and a side opening portion that is open on at least one side, a door member for opening and closing the side opening of the container body, A guide groove is formed from each side edge of the side opening of the container body to an upper end of the container body to guide each side end of the door member in the up-down direction, and an engagement groove is formed at a lower edge of the side opening of the container body so as to be engageable with the lower end of the door member, the bottom wall portion has a bottom wall inclined portion on a lower edge side of the side opening portion, the bottom wall portion being inclined with respect to a horizontal direction so as to become lower as it goes away inward from the side opening portion, A container characterized in that an inner edge of the engagement groove is connected to the top of the bottom wall inclined portion, and the engagement groove is continuously provided in an outward direction of the bottom wall inclined portion.

7. A container as described in any one of claims 1 to 6, characterized in that each side end of the door member has three abutment surfaces that can abut against three inner wall surfaces of the guide groove of the container body, and the three abutment surfaces of the door member and the three inner wall surfaces of the guide groove of the container body are each set to the same slope.

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