JP7630829B2 - Containers and container sets - Google Patents

Description

The present invention relates to a container having a container body and a lid, and a container set.

In a conventional container having a generally box-shaped container body that opens upward and a lid that fits over the container body, when the containers are stacked on top of each other, a bottom projection that projects downward and is provided along the outer periphery of the bottom surface of the container body of the upper container is inserted into a top recess that is provided in a generally square ring shape on the top surface of the lid of the lower container, resulting in a generally engaged state, thereby preventing relative horizontal displacement between the containers (see, for example, Patent Document 1, etc.).

Publication No. 8-4423

Incidentally, when a worker stacks containers, there are cases where the container to be placed on top is first placed in a state where it is horizontally misaligned with respect to the lid of the container below, and then the upper container is slid to eliminate the misalignment (slide stacking). Here, when the containers of Patent Document 1 are slide stacked, the lower surface protrusion of the upper container slides against the portion of the lid of the lower container that is located on the inner periphery of the upper surface recess. However, if the upper container is displaced laterally relative to the direction of slide stacking, there is a concern that the lower surface protrusion of the upper container will exceed the portion of the lid of the lower container that is located on the outer periphery of the upper surface recess and fall off.

The present invention has been made to solve the problems exemplified above, and its purpose is to provide a container and container set that can stabilize the stacked state and improve workability when stacking.

Below, we will explain each of the means suitable for achieving the above objectives. In addition, we will add the specific effects of the corresponding means as necessary.

Means 1. A container having a generally box-shaped container body that opens upward and a lid that is placed on the container body,
The cover body includes a top plate portion having a generally rectangular shape in a plan view, a protrusion portion protruding upward from each side edge portion of the top plate portion or a portion adjacent thereto, and a restricting protrusion portion protruding upward from a position of the top plate portion on an inner circumferential side of the protrusion portion and spaced apart from the protrusion portion,
The container body is provided with lower protrusions that protrude downward from each side edge portion of the bottom surface or a portion adjacent thereto and that come into contact with the installation surface when the container body is installed on the installation surface;
The restricting protrusion includes an inner restricting portion that constitutes a surface of the restricting protrusion on the side of the top plate portion, and an inclined portion that constitutes a surface of the restricting protrusion on the central portion side of the top plate portion and is inclined downward toward the central portion side of the top plate portion,
When the containers are stacked on top of each other, the lower protrusion portion of the upper container is supported by abutting against an installation portion of the top plate portion of the lower container, which is a portion of the top plate portion that is on the inner periphery of the convex portion and is closer to the side edge portion of the top plate portion than the regulating convex portion, and the lower protrusion portion of the upper container abuts against the convex portion of the lower container or the inner regulating portion of the regulating convex portion, thereby regulating relative displacement in the horizontal direction between the stacked containers,
When stacking the containers, the upper container is placed relative to the lid of the lower container at a position displaced from a specified position at which the lower protrusion portion of the upper container is installed on the installation portion of the lower container, and then the upper container is slid toward the specified position to perform slide stacking, in which the lower protrusion portion of the upper container slides in contact with a sliding contact portion of the top plate portion of the lower container, which is a portion closer to the center of the top plate portion than a specified regulating convex portion, and is installed on the installation portion of the lower container via the inclined portion of the specified regulating convex portion of the lower container,
The container is characterized in that the convex portion protrudes above the sliding contact portion, and when the lower protrusion portion of the upper container slides against the sliding contact portion of the lower container, the lower protrusion portion of the upper container abuts against the convex portion of the lower container, thereby regulating relative displacement in a horizontal direction that intersects the direction of the sliding displacement.

According to the first means, when the upper container is placed at a position shifted from the specified position relative to the lid of the lower container and then displaced to the specified position (slide stacking), the lower protrusion of the upper container abuts against the convex portion of the lower container during the slide stacking, which guides the direction of the slide stack, and prevents the upper container from shifting laterally relative to the direction of the slide stack and falling off the lid of the lower container. Furthermore, during the slide stacking, the lower protrusion of the upper container may abut against the regulating convex portion of the lid of the lower container, but since the surface of the central portion (sliding portion side) of the top plate portion of the regulating convex portion is an inclined portion, the lower protrusion of the upper container can relatively easily overcome the regulating convex portion of the lower container and displace to the installation portion. Therefore, the workability when stacking containers can be improved. Furthermore, when the stacking of the upper container is completed, i.e., when the lower protrusion of the upper container is installed in the installation portion of the lid of the lower container, the relative horizontal displacement between the stacked containers is restricted, thereby stabilizing the stacked state of the containers.

Means 2. The container described in means 1, characterized in that the restricting protrusions are provided corresponding to a pair of side edges of the top plate portion that extend in a direction substantially perpendicular to the direction of the sliding displacement.

According to the second method, when the containers are stacked on top of each other, the relative displacement between the containers in the direction of the sliding displacement can be restricted on both one side and the other side in the direction of the sliding displacement of the containers. As a result, the stacked containers can be further stabilized.

Means 3. The container according to means 1 or 2, characterized in that the lower protrusion portion is provided with a sliding portion that slides against the sliding contact portion of the lid when the container is slid and stacked, and a friction reducing shape portion that is formed adjacent to the sliding portion by making the forming range of the sliding portion shorter than the corresponding side edge portion of the lower surface of the container body, and that can be moved away from the top plate portion of the lid and the inclined portion when the container is slid and stacked.

According to the third method, the contact area between the upper container (lower protrusion) and the lower container (top plate and inclined portion) during the sliding stacking of containers can be reduced, thereby reducing frictional resistance. Therefore, the upper container can be slid and displaced more smoothly during the sliding stacking of containers, and the workability when stacking containers can be further improved.

Means 4. The lid body includes a lower wall portion extending downward from the outer periphery of the top plate portion or the vicinity thereof, and a fitting protrusion protruding downward from the top plate portion on the central portion side of the top plate portion relative to the lower wall portion, and at least a portion of the fitting protrusion is substantially fitted into the inner side of the opening of the container body when the lid body is placed on the container body,
In the vertical direction, a lower end portion of the fitting protrusion is located at the same position as a lower end portion of the lower wall portion or located higher than the lower end portion of the lower wall portion,
The fitting protrusion includes a finger hook on a surface of the top plate on the central portion side, on which an operator can hook his/her finger,
A container described in any one of means 1 to 3, characterized in that, in the vertical direction, the upper end of the inclined portion is located at the same position as the upper end of the convex portion or lower than the upper end of the convex portion.

According to the fourth aspect, by providing the finger hook, when an operator carries the lid body alone or in a state where the lid bodies are stacked, the lid body can be grasped by hooking the finger hook and the inclined portion of the restricting protrusion. In particular, when carrying multiple lid bodies in a stacked state, the multiple lid bodies can be appropriately held by hooking the finger hook, which is located slightly inward from the outer periphery of the lid body, and the inclined portion of the restricting protrusion. For example, when the fingers are hooked on the convex portion and the lower wall portion located on the outer periphery or in the vicinity of the lid body, the multiple lid bodies spread out like a fan and cannot be grasped properly. Therefore, the convenience of carrying the lid body can be improved. In addition, the restricting protrusion (inclined portion) is configured not to protrude too far upward, which suppresses damage to the restricting protrusion and stabilizes the lower protrusion of the upper container when it passes over the restricting protrusion of the lower container during slide stacking.

Means 5. A container set including the container according to any one of means 1 to 4 and a second container having a similar configuration to the container and a smaller size than the container,
The width of the second container in the short side is equal to or less than half the width of the long side of the container, and a predetermined number of the second containers can be placed side by side on the upper side of the container,
When the predetermined number of second containers are placed side by side on top of the container, the second lower protrusion portion of the second container abuts against the convex portion of the container or the inner regulating portion of the regulating convex portion, or the second container abuts against another second container, thereby regulating relative displacement in the horizontal direction between the stacked container and the second container, and the second lower protrusion portion of the second container abuts against an installation portion of the top plate portion of the container and is supported,
This container set is characterized in that, when placing the second container on the container, the second container is placed relative to the lid of the container at a position shifted from a specified position at which the second lower protrusion portion of the second container is installed on the installation portion of the container, and then a slide stack is performed in which the second container is slid toward the specified position, and the second lower protrusion portion of the second container slides against a sliding portion of the top plate portion of the container, which is a portion closer to the center of the top plate portion than a specified regulating protrusion portion, and is installed on the installation portion of the container via the inclined portion of the specified regulating protrusion of the container.

According to the fifth aspect, since the second container has the same structure as the container, the second containers can be stacked on top of each other, and if the worker is familiar with the container's slide stacking, the second containers can be stacked on top of each other relatively easily. Furthermore, the second container also has a second lower protrusion, and like the containers that are stacked on top of each other, the second container can be slid and displaced on top of the container in the same direction as the containers that are stacked on top of each other to stack the second containers on top of each other. In addition, when the second container is placed on top of a container and when the second containers are stacked on top of each other, horizontal relative displacement between the container and the second container and horizontal relative displacement between the second containers can be prevented, and the stacked states can be stabilized.

Means 6. With regard to the container according to any one of means 1 to 4 above, a first container body and a third container body having an upper end with the same outer dimension as the first container body and a lower end with a smaller outer dimension are provided as the types of the container body,
As the types of the containers, a first container in which the first container body is covered with the lid body and a third container in which the third container body is covered with the lid body are provided,
When the first container body is placed on the lid body, an outer surface of the lower protrusion of the first container body and the convex portion of the lid body can come into contact with each other,
A container set characterized in that, when the third container body is placed on the lid body, the inner surface of the lower protrusion portion of the third container body and the inner regulating portion of the regulating convex portion of the lid body are configured to be able to abut.

According to the sixth aspect, even when the first and third containers, which have a common lid and different outer dimensions of the bottom end of the container body, are stacked by type or in combination, the containers can be slid and stacked stably, and the containers can be stabilized when stacked. This can improve convenience, etc.

FIG. FIG. 2 is a perspective view showing the upper surface side of the container body. FIG. 2 is a perspective view showing the lower surface side of the container body. FIG. 2 is a perspective view showing the upper surface side of the lid body. FIG. 4 is a perspective view showing the underside of the lid body. FIG. FIG. 13 is a cross-sectional view showing a slide stack of a container. 11 is a perspective view, partially in cross section, showing a state in which a second container is placed on the container. FIG. FIG. 13 is a partial enlarged cross-sectional view showing a slide stack of a second container relative to the container. FIG. 2 is a side view of the container showing the right half in cross section. A partially enlarged cross-sectional view showing the short side convex portion, regulating convex portion, and the peripheral portion of the short side lower protrusion portion of the upper container when a third container body is placed on the lid. A partially enlarged cross-sectional view showing the short side convex portion, regulating convex portion, and the peripheral portion of the short side lower protrusion portion of the upper container when the first container body is placed on the lid.

One embodiment will be described below with reference to the drawings. As shown in Figs. 1 and 2, the container 1 comprises a container body 2 that is substantially rectangular box-shaped and opens upward, and a lid body 3 that is detachably fitted onto the container body 2. The container body 2 and the lid body 3 are each integrally formed from polypropylene.

As shown in Figures 2 and 3, the container body 2 has a bottom wall portion 4 that is generally rectangular in plan view, long side wall portions 5 that extend upward from each of the long sides of the bottom wall portion 4, and short side wall portions 6 that extend upward from each of the short sides of the bottom wall portion 4. In this embodiment, the long side wall portions 5 and the short side wall portions 6 extend upward at an angle toward the outside of the container body 2. With this configuration, the container bodies 2 can be stacked (nested) on top of each other by accommodating the upper container body 2 inside the lower container body 2.

The container body 2 also includes an upper flange portion 7 extending outward from the upper edge of the long side wall portion 5 and the short side wall portion 6 toward the outside of the container body 2, a folded portion 8 extending downward from the outer periphery of the upper flange portion 7, and a connecting rib 9 (see FIG. 3) connecting the upper flange portion 7, the folded portion 8, and the long side wall portion 5 or the short side wall portion 6. Furthermore, a stacking rib 10 is provided, which is formed by extending the connecting rib 9 provided near both sides of each long side wall portion 5 downward beyond the lower end of the folded portion 8. The lower end of the stacking rib 10 is located above the center of the container body 2 in the height direction, and when the container bodies 2 are nested, the lower end of the stacking rib 10 of the upper container body 2 is supported by abutting against the upper surface of the upper flange portion 7 of the lower container body 2.

3, the container body 2 is provided with long side lower protrusions 11 that protrude downward from each long side edge of the underside of the bottom wall 4 (container body 2), short side lower protrusions 12 that protrude downward from each short side edge of the underside of the bottom wall 4, and inner peripheral ribs 13 that are provided in a lattice pattern on the inner peripheral sides of the long side lower protrusions 11 and short side lower protrusions 12. The long side lower protrusions 11 and short side lower protrusions 12 are connected to each other at both ends, and as a whole form a roughly rectangular frame when viewed from below. The long side lower protrusions 11 and short side lower protrusions 12 extend downward beyond the inner peripheral rib 13, and when the container body 2 is placed on an installation surface such as a floor surface, the long side lower protrusions 11 and short side lower protrusions 12 come into contact with the installation surface. In addition, a lid fastener 14 is provided on the upper outer surface of each short side wall 6, which is rotatably connected with the lateral direction of the short side wall 6 as the axial direction and prevents the lid 3 covering the container body 2 from falling off (floating up) (see FIG. 1, etc.).

As shown in Figure 4, the lid body 3 comprises a top plate portion 21 having a generally rectangular shape in plan view, long side convex portions 22 protruding upward from each of the long side edges of the top plate portion 21, short side convex portions 23 protruding upward from each of the short side edges of the top plate portion 21, and a restricting convex portion 24 protruding upward from a position on the inner periphery of the long side convex portions 22 and the short side convex portions 23 of the top plate portion 21 spaced apart from the long side convex portions 22 and the short side convex portions 23. The long side convex portions 22 and the short side convex portions 23 are connected to each other at both ends, and the overall shape of the lid body 3 is generally rectangular in plan view. In addition, the long side convex portion 22 and the short side convex portion 23 include a convex inner wall portion 26 that extends upward from each long side portion and each short side portion of the top plate portion 21, a convex upper wall portion 27 that extends from the upper edge of the convex inner wall portion 26 to the outside of the lid body 3, and a convex outer wall portion 28 that extends downward from the outer edge of the convex upper wall portion 27. The boundary between the convex upper wall portion 27 and the convex outer wall portion 28 is chamfered. Furthermore, the convex outer wall portion 28 extends downward beyond the top plate portion 21. In this embodiment, the lower part of the convex outer wall portion 28 corresponds to the lower wall portion.

In addition, the regulating protrusions 24 of this embodiment are provided corresponding to each short side of the top plate portion 21, and extend approximately parallel to each short side protrusion 23. Furthermore, as shown in Figures 4 and 6, the regulating protrusions 24 include an inner regulating portion 30 that constitutes the surface of the regulating protrusions 24 on the short side of the top plate portion 21, and an inclined portion 31 that constitutes the surface of the regulating protrusions 24 on the central side of the top plate portion 21 and inclines downward toward the central side of the top plate portion 21. In this embodiment, the inclined portion 31 is curved so that the portion on the central side of the top plate portion 21 bulges slightly downward (inside the regulating protrusions 24), and the portion on the short side of the top plate portion 21 bulges slightly upward. It is also possible for the inclined portion 31 to be curved in a different shape or to be flat.

As shown in Fig. 10, in this embodiment, containers 1 each having a lid 3 covering a container body 2 can be stacked one on top of the other (hereinafter also referred to as "stacking") in such a way that relative displacement in the horizontal direction is restricted. As shown in Fig. 12, when the containers 1 are stacked, the long side lower protrusion 11 and the short side lower protrusion 12 of the upper container 1 are installed (supported by abutting) on the installation portion 33, which is a portion of the top plate portion 21 of the lower container 1 on the inner periphery of the long side convex portion 22 and the short side convex portion 23 and on the short side and long side sides of the top plate portion 21 beyond the restricting convex portion 24 (a substantially square annular portion in plan view adjacent to the inner periphery of the long side convex portion 22 and the short side convex portion 23). Furthermore, the long side lower protrusion 11 and short side lower protrusion 12 of the upper container 1 come into contact with the convex inner wall 26 of the long side convex 22 and short side convex 23 of the lower container 1, or the inner regulating portion 30 of the regulating convex 24, thereby regulating the relative displacement in the horizontal direction between the stacked containers 1.

7, in this embodiment, when stacking the containers 1, the upper container 1 is placed on the lid 3 of the lower container 1 at a position shifted in the longitudinal width direction of the container 1 from the specified position where the long side lower protrusion 11 and the short side lower protrusion 12 of the upper container 1 are placed on the installation section 33 of the lower container 1, and then the upper container 1 is slid to the specified position to perform slide stacking. In other words, when performing slide stacking of the containers 1, the upper container 1 is first placed on the lid 3 of the lower container 1 at an angle so that one short side lower protrusion 12 of the upper container 1 abuts against the sliding contact portion 34, which is a portion of the top plate 21 of the lower container 1 that is closer to the center of the top plate 21 than the restricting protrusion 24. In this state, the long side lower protrusion 11 of the upper container 1 may be abutted against the short side protrusion 23 of the lower container 1 (as if leaning it diagonally), or the worker may hold it afloat so that they do not abut.

Furthermore, while maintaining the state in which the short side lower protrusion 12 is in contact with the sliding contact portion 34, the upper container 1 is slid toward the specified position (the short side lower protrusion 12 is slid against the sliding contact portion 34). By performing a sliding displacement of a predetermined length, the short side lower protrusion 12 of the upper container 1 abuts against the regulating convex portion 24 of the lower container 1. At this time, since the surface of the regulating convex portion 24 on the central side (sliding contact portion 34 side) of the top plate portion 21 is the inclined portion 31, the short side lower protrusion 12 climbs over the regulating convex portion 24 relatively smoothly and is installed in the installation portion 33 (as shown in FIG. 12). In addition, as the short side lower protrusion 12 that climbs over the regulating convex portion 24 is installed in the installation portion 33, the opposite short side lower protrusion 12 is also installed in the installation portion 33 at a position closer to the central side of the top plate portion 21 than the short side convex portion 23. In this way, the slide stack for container 1 is completed.

2 and 3, the bottom wall 4 of this embodiment is shaped such that the areas including the center of each of the long side and short side edges are recessed toward the center of the bottom wall 4 more than the areas including the corners of the bottom wall 4. Therefore, the long side side wall 5 and short side side wall 6, which are provided along each side of the bottom wall 4, and the long side lower protrusion 11 and short side lower protrusion 12 are also shaped so that the areas including the corners of the container body 2 protrude outward from the container body 2 compared to the areas including the center of the long side side wall 5 and short side side wall 6 in the horizontal direction and the areas including the center of the long side lower protrusion 11 and short side lower protrusion 12 in the horizontal direction.

Here, when sliding and stacking the containers 1, the portions of the lower short side protrusions 12 including the corner portions of the container body 2 abut against the top plate portion 21 (sliding portion 34) of the lower container 1, whereas the portions of the lower short side protrusions 12 including the central portion in the width direction are spaced apart from the top plate portion 21 (sliding portion 34) of the lower container 1 because the container body 2 is in an inclined position. In other words, the short side lower protrusion 12 has a sliding portion 36 (a portion including the corner portion of the container body 2) that slides against the top plate portion 21 (sliding portion 34) of the lid body 3 when the container 1 is slid and stacked, and a friction reducing shape portion 37 (a portion including the widthwise center portion of the short side lower protrusion 12) that is formed adjacent to the sliding portion 36 by making the formation range of the sliding portion 36 shorter than the corresponding short side edge portion of the underside of the container body 2, and that can be separated from the top plate portion 21 of the lid body 3 and the inclined portion 31 when the container 1 is slid and stacked.

As shown in FIG. 1, the top plate portion 21 of this embodiment has no steps, and the installation portion 33 and the sliding portion 34 are located on the same plane. As described above, the portion of the short side lower protrusion portion 12 that includes the corner portion of the container body 2 is made into the sliding portion 36, so that a portion of the installation portion 33 where the long side lower protrusion portion 11 is installed when the containers 1 are stacked overlaps with a portion of the sliding portion 34.

Furthermore, since the long side convex portion 22 protrudes above the sliding contact portion 34 (top plate portion 21), when the containers 1 are slid and stacked, as shown in FIG. 7, when the short side lower protrusion portion 12 (sliding portion 36) of the upper container 1 slides against the sliding contact portion 34 of the lower container 1, the long side lower protrusion portion 11 of the upper container 1 (the portion of the long side lower protrusion portion 11 that connects to the sliding portion 36 of the short side lower protrusion portion 12 that slides against the sliding contact portion 34) abuts against the long side convex portion 22 (convex portion inner wall portion 26) of the lower container 1, thereby restricting relative displacement in the horizontal direction that intersects the direction of sliding displacement.

As shown in Figures 5 to 7 and 12, the lid body 3 has an engagement protrusion 41 that protrudes downward from the top plate portion 21 nearer the center of the top plate portion 21 than the convex outer wall portion 28 (in this example, in the inner/outer circumferential direction of the lid body 3, nearer the inner periphery of the lid body 3 than the convex inner wall portion 26 and further outward than the inner regulating portion 30, i.e., the back surface side of the installation portion 33), and at least a portion of which is approximately engaged with the inner side of the opening of the container body 2 when the lid body 3 is placed over the container body 2. The engagement protrusion 41 has insertion portions 42 that correspond to each corner of the opening of the container body 2, and finger hook portions 43 that connect the insertion portions 42, and the insertion portions 42 extend downward beyond the finger hook portions 43. Furthermore, the lid 3 includes an inner circumferential reinforcement rib 44 that connects between the portions of the fitting protrusion 41 that correspond to a pair of long side portions of the lid 3 on the inner circumferential side of the fitting protrusion 41, and an outer circumferential reinforcement rib 45 that connects between the fitting protrusion 41 and the convex outer wall portion 28, and the lower edges of the inner circumferential reinforcement rib 44 and the outer circumferential reinforcement rib 45 are at the same height as the lower edge of the finger hook portion 43. In other words, when the lid 3 is placed on the container body 2, a portion including the upper flange portion 7 of the container body 2 is inserted between the convex outer wall portion 28 of the lid 3 and the fitting protrusion 41, and the lower edge of the outer circumferential reinforcement rib 45 of the lid 3 is supported by abutting against the upper flange portion 7 of the container body 2. Furthermore, the insertion portion 42 of the fitting protrusion 41 of the lid 3 is inserted into the inner side of the container body 2.

The finger hook 43 of the fitting protrusion 41 is not inserted into the inside of the container body 2 even when the lid 3 is placed over the container body 2. However, the provision of the finger hook 43 increases the strength and rigidity of the insertion portion 42, and also forms a portion on the underside of the lid 3 that allows the operator to hook his or her finger on the surface on the central side of the top plate 21 at a position a predetermined distance away from the range including the long side and the center of the short side of the top plate 21 toward the central side of the top plate 21.

In addition, as shown in FIG. 6, the upper end of the inclined portion 31 (regulating protrusion 24) is at the same position (same height) as the upper ends of the long side protrusion 22 and the short side protrusion 23 in the vertical direction. In this embodiment, in the horizontal direction, the distance between the inner regulating portion 30 of the regulating protrusion 24 and the portion of the finger hook portion 43 of the fitting protrusion 41 that is provided corresponding to the short side of the top plate portion 21 (hereinafter also referred to as the "short side finger hook portion 43") is shorter than the distance between the short side finger hook portion 43 and the protrusion outer wall portion 28. As a result, the forming positions of the regulating protrusion 24 and the short side finger hook portion 43 are not so far apart in the horizontal direction. Also, as shown in FIG. 4, a locking recess 46 that is locked with the lid fixing device 14 is provided in the range including the center of the short side protrusion 23. The locking recess 46 is provided with a locked wall 47 that extends in a substantially horizontal direction, while omitting the convex upper wall 27 and the upper portion of the convex outer wall 28. When the lid fastener 14 is in a locked state (rotated upward) that prevents the lid 3 from falling off, the elastic locking piece 48 of the lid fastener 14 presses against the upper surface of the locked wall 47.

As shown in FIG. 8, a second container 51, which has the same configuration as container 1 but is a smaller version of container 1, can be placed on container 1 to store, transport, etc. container 1 and the items contained in second container 51. The short side width of second container 51 is approximately 1/2 the long side width of container 1 (slightly shorter than 1/2), and the long side width of second container 51 is approximately the same as the short side width of container 1. Two second containers 51 are configured to be placed side by side on top of container 1 in the long side width direction of container 1.

When two second containers 51 are placed side by side on top of the container 1, a pair of second short side lower protrusions 52 and one second long side lower protrusion 53 of the second container 51 are placed on the installation section 33 of the container 1. Therefore, the second long side lower protrusion 53 and the second short side lower protrusion 52 of the second container 51 abut against the convex inner wall 26 of the long side convex portion 22 and the short side convex portion 23 of the container 1, or the inner regulating portion 30 of the regulating convex portion 24, or the second container 51 abuts against another second container 51, thereby regulating the relative displacement in the horizontal direction between the stacked container 1 and the second container 51.

In addition, when placing the second container 51 on the container 1, it is also possible to perform slide stacking by placing the second container 51 at a position shifted from the specified position (the position where the pair of second short side lower protrusions 52 and one of the second long side lower protrusions 53 are installed on the installation section 33 of the container 1) in the longitudinal width direction of the container 1 and then sliding it to the specified position. That is, since there is an area between the pair of regulating protrusions 24 that allows the short side width of the second container 51, the second container 51 is placed between the pair of regulating protrusions 24 without tilting. Then, as shown in FIG. 9, by sliding the second container 51 to the specified position, the second long side lower protrusion 53 will overcome the regulating protrusion 24 and be installed on the installation section 33. As described above, it is possible to perform slide stacking of the second container 51 on the container 1. In this case, when the second container 51 slides between the pair of regulating protrusions 24, the pair of second long side lower protrusions 53 and the pair of second short side lower protrusions 52 (including the friction reduction shape portion 37) slide against the top plate portion 21, but when one of the second long side lower protrusions 53 slides against the inclined portion 31 of the regulating protrusion 24, the pair of second short side lower protrusions 52 move away from the top plate portion 21, and the friction reduction shape portion 37 of the second long side lower protrusions 53 also moves away from the inclined portion 31 and the top plate portion 21. In addition, it is also possible to slide stack the second container 51 against the container 1 by placing the second container 51 in a tilted position such that the lower protrusion 53 on one second long side of the second container 51 abuts against the sliding contact portion 34 and the lower protrusion 53 on the other second long side is spaced upward from the container 1, and then sliding the second container 51 to a specified position.

In addition, since the second container 51 has the same configuration as the container 1, the second containers 51 can also be slid and stacked together, and the second containers 51 are placed with their positions shifted in the longitudinal width direction and then slid. Therefore, the direction in which the second container 51 is slid and stacked on top of the container 1 intersects (approximately perpendicular to) the direction in which the second container 51 is slid and stacked on top of the second container 51 placed on top of the container 1.

10, the types of container body 2 for container 1 include a first container body 62 and a third container body 64 having the same outer dimensions at the upper end and smaller outer dimensions at the lower end than the first container body 62. Therefore, the types of container 1 include a first container 61 in which the first container body 62 is covered with a lid body 3, and a third container 63 in which the third container body 64 is covered with a lid body 3 (the lid body 3 is the same as that which is covered on the first container 61). In addition, with regard to the first container body 62 and the third container body 64, examples of a configuration in which the outer dimensions of the upper end are the same size and the outer dimensions of the lower end are different sizes include a configuration in which the inclination angle of the long side wall portion 5 and the short side wall portion 6 of the third container body 64 is different from that of the first container body 62, the inclination angle is the same but the vertical width of the long side wall portion 5 and the short side wall portion 6 is different, or a step shape is provided in the long side wall portion 5 and the short side wall portion 6. Also, the container 1 shown in Figures 1, 7, 8, and 9 is the first container 61, and the container body 2 shown in Figures 2 and 3 is the first container body 62.

As shown in FIG. 12, when the first container body 62 is placed on the lid body 3, the outer surface of the short side lower protrusion 12 (sliding portion 36) of the first container body 62 and the short side convex portion 23 (convex portion inner wall portion 26) of the lid body 3 can abut. On the other hand, as shown in FIG. 11, when the third container body 64 is placed on the lid body 3, the inner surface of the short side lower protrusion 12 (friction reduction shape portion 37) of the third container body 64 and the inner regulating portion 30 of the regulating convex portion 24 of the lid body 3 can abut. With regard to the long side lower protrusion 11, both the first container body 62 and the third container body 64 abut against the long side convex portion 22 of the lid body 3, and the relative displacement in the horizontal direction (short width direction of the container 1) is regulated.

As described above in detail, according to this embodiment, when the containers 1 are stacked on top of each other, the long side lower protrusion 11 and short side lower protrusion 12 of the upper container 1 abut against the convex inner wall 26 of the long side convex 22 and short side convex 23 of the lid 3 of the lower container 1, or the inner regulating portion 30 of the regulating convex 24, thereby regulating the relative displacement in the horizontal direction between the stacked containers 1. This allows the containers 1 to be stabilized in a stacked state.

In addition, when performing slide stacking in which the upper container 1 is once placed in a position shifted from a specified position in the longitudinal width direction of the container 1 relative to the lid 3 of the lower container 1 and then displaced to the specified position, the short side lower protrusion 12 of the upper container 1 abuts against the long side protrusion 22 of the lower container 1 during the slide stacking, which guides the direction of the slide stack, and prevents the upper container 1 from shifting laterally relative to the direction of the slide stack and falling off the lid 3 of the lower container 1. Furthermore, during the slide stacking, the short side lower protrusion 12 of the upper container 1 abuts against the regulating protrusion 24 of the lower container 1, but since the surface of the regulating protrusion 24 on the central side (sliding contact portion 34 side) of the top plate portion 21 is an inclined portion 31, the short side lower protrusion 12 of the upper container 1 can relatively easily overcome the regulating protrusion 24 of the lower container 1 and displace to the installation portion 33. This improves workability when stacking containers 1.

Furthermore, the regulating protrusions 24 of the lid body 3 are provided in pairs corresponding to each short side edge of the top plate portion 21. Therefore, when the third container body 64 is placed on the lid body 3 (for example, when the third containers 63 are stacked on top of each other), the relative displacement between the containers 1 (for example, between the third containers 63) in the direction of the sliding displacement of the slide stack (the longitudinal width direction of the containers 1) can be regulated on both one side and the other side in the sliding displacement direction of the containers 1. As a result, the stacked state of the containers 1 can be further stabilized.

In addition, the short side lower protrusion 12 has a sliding portion 36 that slides against the sliding portion 34 of the lid 3 when the containers 1 are slid and stacked, and a friction reducing shape portion 37 that can be moved away from the top plate portion 21 and the inclined portion 31 of the lid 3 when the containers 1 are slid and stacked. This reduces the contact area between the upper container 1 (short side lower protrusion 12) and the lower container 1 (top plate portion 21 and inclined portion 31) when the containers 1 are slid and stacked, thereby reducing frictional resistance. This allows the upper container 1 to slide and displace more smoothly when the containers 1 are slid and stacked, and further improves workability when stacking the containers 1.

The sliding portion 36 is provided in a range including the corner portion (on the bottom surface) of the container body 2. Therefore, even if the short side lower protrusion 12 (sliding portion 36) of the upper container 1 comes into contact with the long side protrusion 22 of the lower container 1 during slide stacking, the upper container 1 can be prevented from protruding laterally from the upper range of the lower container 1. This allows for more stable slide stacking work, and prevents the short side lower protrusion 12 from interfering with the long side protrusion 22 of the lower container 1 when the short side lower protrusion 12 of the upper container 1 rides over the regulating protrusion 24 of the lower container 1, making it impossible to install the short side lower protrusion 12 on the installation portion 33 unless the upper container 1 is shifted in a direction intersecting the sliding displacement direction of the slide stack.

In addition, by providing a finger hook 43 on the underside (fitting protrusion 41) of the lid body 3, when an operator carries the lid body 3 alone or in a state where the lid bodies 3 are stacked on top of each other, the lid body 3 can be grasped by hooking the finger hook 43 and the inclined portion 31 of the restricting protrusion 24. In particular, when carrying multiple lid bodies 3 in a stacked state, the multiple lid bodies 3 can be appropriately clamped by hooking the finger hook 43, which is located slightly inward from the outer periphery of the lid body 3, and the inclined portion 31 of the restricting protrusion 24. For example, when the fingers are hooked on the inner wall portion 26 and the lower side portion of the outer wall portion 28 of the short side side protrusion 23 located on the outer periphery or in the vicinity of the lid body 3, the multiple lid bodies 3 spread out like a fan and cannot be properly grasped. Therefore, the convenience of carrying the lid body 3 can be improved.

In addition, in the vertical direction, the upper end of the inclined portion 31 (regulating protrusion 24) is located at the same position as the upper ends of the long side protrusion 22 and the short side protrusion 23. As a result, the regulating protrusion 24 is configured not to protrude too far upward, which suppresses damage to the regulating protrusion 24 and also provides stabilization when the short side lower protrusion 12 of the upper container 1 overcomes the regulating protrusion 24 of the lower container 1 during slide stacking.

In addition, the second container 51, whose short side width is about 1/2 the long side width of the container 1 and whose long side width is almost the same size as the short side width of the container 1, has a similar configuration to the container 1, so that the second containers 51 can be slid and stacked together, and if an operator is familiar with the slid stacking of the container 1, the second containers 51 can also be slid and stacked relatively easily. Furthermore, the second container 51 also has a second short side lower protrusion 52, so that, like the slid stacking of the containers 1, the second container 51 can be slid and stacked on top of the container 1 in the same direction as the slid stacking of the containers 1. In addition, when the second container 51 is placed on top of the container 1 and when the second containers 51 are stacked on top of each other, it is possible to prevent horizontal relative displacement between the container 1 and the second container 51, and between the second containers 51, and to stabilize the stacked states.

Furthermore, the containers 1 include a first container 61 and a third container 63 each having a first container body 62 and a third container body 64, which have different outer dimensions at the bottom end, and a common lid body 3. Even when the first containers 61 and the third containers 63 are stacked by type or in combination by type, the containers 1 can be stably slide stacked, and the containers 1 can be stabilized when stacked. This can improve convenience, etc.

The present invention is not limited to the above embodiment, and may be implemented as follows. Of course, other applications and modifications not exemplified below are also possible.

(a) In the above embodiment, the regulating protrusions 24 are provided so as to extend parallel to the short side protrusions 23 in correspondence with each short side of the top plate 21, but this is not particularly limited to such a configuration, and it is sufficient that the regulating protrusions 24 are positioned closer to the center of the top plate 21 than the installation portion 33 (the long side lower protrusions 11 and short side lower protrusions 12 of the container 1 stacked on top) and are configured in a way that may contribute to preventing relative displacement in the horizontal direction when the containers 1 are in a specified stacking state.

For example, four restricting protrusions may be provided corresponding to the four corners of the top plate 21. For example, if each restricting protrusion 24 in the above embodiment is shaped as if it were divided into two, an inclined portion 31 is provided on the central side of the longitudinal width direction of the container 1, and a slide stack that slides and displaces along the longitudinal direction of the container 1 can be performed, and it is also possible to place a plurality of small containers (for example, two in the lateral width direction of the container 1 and two in the longitudinal width direction of the container 1, for a total of four) side by side in the lateral width direction of the container 1. The shape and size of the second container placed on the container 1 are not particularly limited and can be changed as appropriate. For example, in the above embodiment, it is also possible to place three second containers in a row, each of which has a lateral width of about 1/3 of the longitudinal width of the container 1. Furthermore, as a modified example of providing four regulating protrusions corresponding to the four corners of the top plate portion 21, for example, an inclined portion 31 may be provided on each regulating protrusion not only on the central side in the longitudinal width direction of the container 1, but also on the central side in the lateral width direction of the container 1, making it possible to provide not only a slide stack that slides along the longitudinal direction of the container 1, but also a slide stack that slides along the lateral direction of the container 1.

The regulating protrusions 24 do not have to be provided symmetrically in a plan view. For example, the regulating protrusions may be provided continuously along one short side edge of the top plate portion 21, and intermittently along the other short side edge (e.g., divided into two). Furthermore, for example, the regulating protrusions may be provided so as to be asymmetrical and rotationally symmetrical in a plan view. In addition, for example, a regulating protrusion may be provided corresponding to only one short side edge of the top plate portion 21. Also, for example, a regulating protrusion may be provided corresponding to only (one) long side edge of the top plate portion 21.

(b) In the above embodiment, the long side convex portion 22 and the short side convex portion 23 are provided in a generally rectangular ring shape without any breaks along the outer periphery of the top plate portion 21, but it is also possible to provide them intermittently (for example, omitting the portion of the short side convex portion 23 that faces the restricting convex portion 24). Also, in the above embodiment, the top plate portion 21 is configured as a flat plate, but for example, the installation portion 33 (the outer periphery portion of the top plate portion 21) may be configured to be lower than the sliding contact portion 34 (the inner periphery portion of the top plate portion 21). However, the sliding contact portion 34 is located lower than the upper end of the long side convex portion 22.

(c) The container 1 of the above embodiment may be configured such that, in a stacked state, when one short side lower protrusion 12 abuts against the inner regulating portion 30 of the regulating protrusion 24 of the lower container 1, the other short side lower protrusion 12 abuts against the convex inner wall portion 26 of the short side convex portion 23 of the lower container 1. It is also possible to embody the container without the lid fastener 14. Incidentally, by providing the lid fastener 14, it is possible to more reliably prevent the lid body 3 from floating up during slide stacking.

(d) In the above embodiment, the container body 2 and the lid body 3 are made of polypropylene, but they may be made of other polyolefin-based resins (polyethylene, etc.) or synthetic resins other than polyolefin-based resins (e.g. ABS resin, AES resin, acrylic resin, polycarbonate, etc.).

1...container, 2...container body, 3...lid, 11...long side lower ridge, 12...short side lower ridge, 21...top plate, 22...long side convex, 23...short side convex, 24...regulating convex, 26...convex inner wall, 28...convex outer wall, 30...inner regulating portion, 31...inclined portion, 33...installation portion, 34...sliding portion, 36...sliding portion, 37...friction reducing shape portion, 51...second container, 52...second short side lower ridge, 53...second long side lower ridge, 61...first container, 62...first container body, 63...third container, 64...third container body.

Claims (6)

A container having a generally box-shaped container body that opens upward and a lid body that covers the container body,
The cover body includes a top plate portion having a generally rectangular shape in a plan view, a protrusion portion protruding upward from each side edge portion of the top plate portion or a portion adjacent thereto, and a restricting protrusion portion protruding upward from a position of the top plate portion on an inner circumferential side of the protrusion portion and spaced apart from the protrusion portion,
The container body is provided with lower protrusions that protrude downward from each side edge portion of the bottom surface or a portion adjacent thereto and that come into contact with the installation surface when the container body is installed on the installation surface;
The restricting protrusion includes an inner restricting portion that constitutes a surface of the restricting protrusion on the side of the top plate portion, and an inclined portion that constitutes a surface of the restricting protrusion on the central portion side of the top plate portion and is inclined downward toward the central portion side of the top plate portion,
When the containers are stacked on top of each other, the lower protrusion portion of the upper container is supported by abutting against an installation portion of the top plate portion of the lower container, which is a portion of the top plate portion that is on the inner periphery of the convex portion and is closer to the side edge portion of the top plate portion than the regulating convex portion, and the lower protrusion portion of the upper container abuts against the convex portion of the lower container or the inner regulating portion of the regulating convex portion, thereby regulating relative displacement in the horizontal direction between the stacked containers,
When stacking the containers, the upper container is placed relative to the lid of the lower container at a position displaced from a specified position at which the lower protrusion portion of the upper container is installed on the installation portion of the lower container, and then the upper container is slid toward the specified position to perform slide stacking, in which the lower protrusion portion of the upper container slides in contact with a sliding contact portion of the top plate portion of the lower container, which is a portion closer to the center of the top plate portion than a specified regulating convex portion, and is installed on the installation portion of the lower container via the inclined portion of the specified regulating convex portion of the lower container,
The container is characterized in that the convex portion protrudes above the sliding contact portion, and when the lower protrusion portion of the upper container slides against the sliding contact portion of the lower container, the lower protrusion portion of the upper container abuts against the convex portion of the lower container, thereby regulating relative displacement in a horizontal direction that intersects the direction of the sliding displacement. The container according to claim 1, characterized in that the restricting protrusions are provided corresponding to a pair of side edges of the top plate portion that extend in a direction substantially perpendicular to the direction of the sliding displacement. The container according to claim 1 or 2, characterized in that the lower protrusion portion is provided with a sliding portion that slides against the sliding contact portion of the lid when the container is slid and stacked, and a friction reducing shape portion that is formed adjacent to the sliding portion by making the formation range of the sliding portion shorter than the corresponding side edge portion of the lower surface of the container body, and that can be separated from the top plate portion of the lid and the inclined portion when the container is slid and stacked. the lid body includes a lower wall portion extending downward from an outer periphery of the top plate portion or a vicinity thereof, and a fitting protrusion protruding downward from the top plate portion on a side closer to a center of the top plate portion than the lower wall portion, and at least a portion of the fitting protrusion being substantially fitted into an inner side of an opening of the container body when the lid body is placed on the container body;
In the vertical direction, a lower end portion of the fitting protrusion is located at the same position as a lower end portion of the lower wall portion or located higher than the lower end portion of the lower wall portion,
The fitting protrusion includes a finger hook on a surface of the top plate on the central portion side, on which an operator can hook his/her finger,
4. The container according to claim 1, wherein the upper end of the inclined portion is located at the same position as the upper end of the convex portion or lower than the upper end of the convex portion in the vertical direction. A container set comprising the container according to any one of claims 1 to 4 and a second container having a similar configuration to the container and a smaller size than the container,
The width of the second container in the short side is equal to or less than half the width of the long side of the container, and a predetermined number of the second containers can be placed side by side on the upper side of the container,
When the predetermined number of second containers are placed side by side on top of the container, the second lower protrusion portion of the second container abuts against the convex portion of the container or the inner regulating portion of the regulating convex portion, or the second container abuts against another second container, thereby regulating relative displacement in the horizontal direction between the stacked container and the second container, and the second lower protrusion portion of the second container abuts against an installation portion of the top plate portion of the container and is supported,
This container set is characterized in that, when placing the second container on the container, the second container is placed relative to the lid of the container at a position shifted from a specified position at which the second lower protrusion portion of the second container is installed on the installation portion of the container, and then a slide stack is performed in which the second container is slid toward the specified position, and the second lower protrusion portion of the second container slides against a sliding portion of the top plate portion of the container, which is a portion closer to the center of the top plate portion than a specified regulating protrusion portion, and is installed on the installation portion of the container via the inclined portion of the specified regulating protrusion of the container. Regarding the container according to any one of claims 1 to 4, a first container body and a third container body having an upper end with the same outer dimension as the first container body and a lower end with a smaller outer dimension are provided as types of the container body,
As the types of the containers, a first container in which the first container body is covered with the lid body and a third container in which the third container body is covered with the lid body are provided,
When the first container body is placed on the lid body, an outer surface of the lower protrusion of the first container body and the convex portion of the lid body can come into contact with each other,
A container set characterized in that, when the third container body is placed on the lid body, the inner surface of the lower protrusion portion of the third container body and the inner regulating portion of the regulating convex portion of the lid body are configured to be able to abut.

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