Lids and containers
The container design with inclined projections and fitting projections improves stacking stability and workability by allowing for smooth slide stacking and secure handling, addressing the issue of horizontal displacement during conventional stacking.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- SANKO CO LTD
- Filing Date
- 2025-01-29
- Publication Date
- 2026-07-29
AI Technical Summary
Conventional containers with lid bodies experience issues during stacking when the upper container is placed horizontally offset, leading to relative displacement and reduced workability.
The container design incorporates a lid with upward protrusions and inclined restricting projections, along with a fitting projection and finger rests, allowing for stable slide stacking and improved grip, while the container body features lower protrusions and ribs for nesting and stabilization.
Enhances the workability and stability of container stacking by minimizing horizontal displacement and facilitating smooth slide stacking, while providing secure handling and preventing lid detachment.
Smart Images
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Abstract
Description
Technical Field
[0001] The present invention relates to a container including a lid body, and, a container body, and the lid body. to
Background Art
[0002] Conventionally, in a container including a substantially box-shaped container body that opens upward and a lid body that covers the container body, when the containers are stacked on top of each other, a lower protruding lower surface side protrusion provided along the outer peripheral portion of the lower surface of the container body of the upper container is inserted into an upper surface side recess provided in a substantially square ring shape on the upper surface of the lid body of the lower container to be in a substantially engaged state, and there is a technique in which relative displacement in the horizontal direction between the containers is prevented (see, for example, Patent Document 1).
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] By the way, when an operator stacks the containers, there is a case where the container to be placed on the upper side is placed in a state where its position is once shifted horizontally with respect to the lid body of the lower container, and then the upper container is slid (slide-stacked) so as to eliminate the shift in the position.
[0005] An object of the present invention is to provide a lid body and a container And, that can improve the workability during stacking. of
Means for Solving the Problems
[0006] The following sections will describe each means suitable for achieving the above objectives. Additionally, specific effects and benefits of each means will be noted as needed.
[0007] Means 1. A lid that is placed over a roughly box-shaped container body that opens upwards, The aforementioned cover is The top panel is roughly rectangular in plan view, Each side of the top plate portion or a nearby portion thereof has a protrusion that projects upward, The top plate portion includes a restricting projection that protrudes upward from a position on the inner circumference side of the protrusion, spaced apart from the protrusion. The restricting projection comprises an inner restricting portion that forms the side surface of the top plate portion, and an inclined portion that forms the central surface of the top plate portion and slopes downward toward the central side of the top plate portion. The top plate portion includes a sliding contact portion which is located on the central side of the top plate portion, relative to the predetermined regulating protrusion. 、 The lid comprises a lower wall portion extending downward from the outer periphery of the top plate portion or its vicinity, and a fitting projection that protrudes downward from the top plate portion on the central side of the top plate portion relative to the lower wall portion, and at least a portion of it is substantially fitted into the opening of the container body when the lid is placed over the container body, In the vertical direction, the lower end of the fitting projection is located at the same position as the lower end of the lower wall portion, or above the lower end of the lower wall portion. The fitting projection is provided with a finger rest on the central side of the top plate portion, which allows an operator to place their fingers on it. In the vertical direction, the upper end of the inclined portion is located at the same position as the upper end of the protrusion, or lower than the upper end of the protrusion. A lid characterized by the following features.
[0008] According to method 1, when the upper container is initially placed on the lid of the lower container at a position offset from the designated position and then displaced to the designated position (slide stacking), the upper container may come into contact with the restricting protrusion on the lid of the lower container during the slide stacking process. However, since the central side (sliding contact side) of the top plate of the restricting protrusion is inclined, the upper container can relatively easily overcome the restricting protrusion of the lower container and be displaced. Therefore, the workability when stacking containers can be improved.
[0010] AlsoThe provision of finger rests allows workers to grip the lids by placing their fingers on the finger rests and the inclined portion of the restricting protrusion when carrying the lids individually or stacked together. In particular, when carrying multiple lids stacked together, the fingers can be placed on the finger rests, which are positioned slightly inward from the outer circumference of the lids, and the inclined portion of the restricting protrusion, allowing for a secure grip of multiple lids. This prevents situations where multiple lids spread out like a fan and cannot be properly gripped, such as when placing fingers on the protrusions located on or near the outer circumference of the lids and the lower wall. Therefore, convenience when carrying the lids can be improved. In addition, the restricting protrusions (inclined portion) are configured not to protrude too far upward, which helps to prevent damage to the restricting protrusions and also helps to stabilize the lower ridge of the upper container when it slides over the restricting protrusion of the lower container during slide stacking.
[0011] means 2 A roughly box-shaped container body with an opening at the top, means to be placed over the container body 1 The lid described and In a container equipped with, When stacking the containers, a slide stack is possible in which the upper container is placed on the lid of the lower container at a position offset from the predetermined position where the upper container is placed on the lower container, and then the upper container is slid toward the predetermined position. The container is characterized in that the regulating protrusions are provided in correspondence with a pair of side edges of the top plate portion that extend in a direction substantially perpendicular to the direction of the sliding displacement.
[0012] According to method 3, when containers are stacked on top of each other, the relative displacement between containers in the direction of sliding displacement can be restricted on both the one side and the other side in the direction of sliding displacement of the containers. As a result, the stacked containers can be further stabilized.
[0013] means 3A substantially box-shaped container body that opens upward, and means for covering the container body 1 the lid described above, and In a container provided with at the upper part of the side wall of the container body, a lid fixing tool for preventing the lid covering the container body from falling off is provided. The lid fixing tool is formed in a U-shaped cross section in a locked state for preventing the lid from falling off, and has a curved surface at the lower part. A container characterized by this.
Brief Description of the Drawings
[0016] [Figure 1] It is a perspective view showing the container. [Figure 2] It is a perspective view showing the upper surface side of the container body. [Figure 3] It is a perspective view showing the lower surface side of the container body. [Figure 4] It is a perspective view showing the upper surface side of the lid. [Figure 5] It is a perspective view showing the lower surface side of the lid. [Figure 6] It is a partially enlarged cross-sectional view of the lid. [Figure 7] It is a cross-sectional view showing the slide stack of the container. [Figure 8] It is a perspective view including a partial cross-section showing a state where a second container is placed on the container. [Figure 9] It is a partially enlarged cross-sectional view showing the slide stack of the second container with respect to the container. [Figure 10] It is a side view of the container showing the right half in cross-section. [Figure 11] It is a partially enlarged cross-sectional view showing the peripheral part of the short side convex part, the regulating convex part of the lower container, and the lower short side protruding strip part of the upper container when a third container body is placed on the lid. [Figure 12] It is a partially enlarged cross-sectional view showing the peripheral part of the short side convex part, the regulating convex part of the lower container, and the lower short side protruding strip part of the upper container when a first container body is placed on the lid.
Modes for Carrying Out the Invention
[0017] An embodiment will be described below with reference to the drawings. As shown in Figures 1 and 2, the container 1 comprises a roughly rectangular box-shaped container body 2 that opens upwards, and a lid 3 that can be detachably placed over the container body 2. The container body 2 and the lid 3 are integrally formed from polypropylene.
[0018] As shown in Figures 2 and 3, the container body 2 comprises a bottom wall portion 4 that is substantially rectangular in plan view, long-side wall portions 5 that extend upward from each long side of the bottom wall portion 4, and short-side wall portions 6 that extend upward from each short side of the bottom wall portion 4. In this embodiment, the long-side wall portions 5 and the short-side wall portions 6 extend upward and inclined outward toward the container body 2. This configuration makes it possible to stack (nest) the container bodies 2 so that the upper container body 2 is housed inside the lower container body 2.
[0019] Furthermore, the container body 2 includes an upper flange portion 7 extending outward from the upper edges of the long side wall portion 5 and the short side wall portion 6, a folded portion 8 extending downward from the outer peripheral edge of the upper flange portion 7, and connecting ribs 9 (see Figure 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. In addition, stacking ribs 10 are provided, formed by extending the connecting ribs 9, which are provided near both sides of each long side wall portion 5, below 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, so that when the container bodies 2 are nested, the lower end of the stacking rib 10 of the upper container body 2 abuts against and is supported by the upper surface of the upper flange portion 7 of the lower container body 2.
[0020] Furthermore, as shown in Figure 3, the container body 2 is provided with long-side lower protrusions 11 that project downward from each long side of the lower surface of the bottom wall 4 (container body 2), short-side lower protrusions 12 that project downward from each short side of the lower surface of the bottom wall 4, and inner circumferential ribs 13 that are arranged in a grid pattern on the inner circumference 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, they form a roughly rectangular frame shape when viewed from below. In addition, the long-side lower protrusions 11 and short-side lower protrusions 12 extend below the inner circumferential ribs 13, so when the container body 2 is placed on a surface such as a floor, the long-side lower protrusions 11 and short-side lower protrusions 12 make contact with the surface. In addition, a lid fixing device 14 is provided on the upper outer surface of each short-side wall portion 6, which is rotatably connected to the lateral width of the short-side wall portion 6 as the axial direction, and prevents the lid 3 placed over the container body 2 from falling off (lifting up) (see Figure 1, etc.).
[0021] As shown in Figure 4, the lid 3 comprises a top plate portion 21 which is roughly rectangular in plan view, long-side protrusions 22 which project upward from each long side of the top plate portion 21, short-side protrusions 23 which project upward from each short side of the top plate portion 21, and regulating protrusions 24 which project upward from a position on the inner circumference of the long-side protrusions 22 and short-side protrusions 23 on the top plate portion 21 that is spaced apart from the long-side protrusions 22 and short-side protrusions 23. The long-side protrusions 22 and short-side protrusions 23 are connected to each other at both ends, and the overall shape is roughly rectangular in plan view. Furthermore, the long-side protrusions 22 and short-side protrusions 23 each include an inner wall portion 26 extending upward from each long side and each short side of the top plate portion 21, an upper wall portion 27 extending outward from the upper edge of the inner wall portion 26 toward the lid 3, and an outer wall portion 28 extending downward from the outer edge of the upper wall portion 27. The boundary between the upper wall portion 27 and the outer wall portion 28 is chamfered. Moreover, the outer wall portion 28 extends below the top plate portion 21. In this embodiment, the lower part of the outer wall portion 28 corresponds to the bottom wall portion.
[0022] Furthermore, the restricting protrusions 24 in this embodiment are provided corresponding to each short side of the top plate portion 21 and extend substantially parallel to each short side protrusion 23. In addition, as shown in Figures 4 and 6, the restricting protrusions 24 include an inner restricting portion 30 that constitutes the surface of the top plate portion 21 on the short side, and an inclined portion 31 that constitutes the surface of the top plate portion 21 on the central side and inclined downward toward the central side of the top plate portion 21. In this embodiment, the inclined portion 31 is curved so that the central side of the top plate portion 21 bulges slightly downward (towards the inside of the restricting protrusions 24), and the short side side of the top plate portion 21 bulges slightly upward. It is also possible to make the inclined portion 31 a different curved shape or a flat surface.
[0023] As shown in Figure 10, in this embodiment, containers 1, each with a lid 3 placed over the container body 2, can be stacked vertically (hereinafter also referred to as "stacking") in such a way that relative horizontal displacement is restricted. As shown in Figure 12, when the containers 1 are stacked, the lower protrusions 11 on the long side and the lower protrusions 12 on the short side of the upper container 1 are placed on (supported by contact with) the mounting portion 33 of the top plate portion 21 of the lower container 1, which is located on the inner circumference side of the long side protrusions 22 and the short side protrusions 23, and on the short side and long side side of the top plate portion 21, which is adjacent to the inner circumference side of the long side protrusions 22 and the short side protrusions 23 (a roughly rectangular ring-shaped portion in plan view adjacent to the inner circumference side of the long side protrusions 22 and the short side protrusions 23). Furthermore, the lower protrusions 11 on the long side and the lower protrusions 12 on the short side of the upper container 1 come into contact with the inner wall portion 26 of the protrusions 22 on the long side and the protrusions 23 on the short side of the lower container 1, or with the inner restricting portion 30 of the restricting protrusion 24, thereby restricting the relative horizontal displacement between the stacked containers 1.
[0024] Furthermore, as shown in Figure 7, in this embodiment, when stacking containers 1, the upper container 1 is first placed on the lid 3 of the lower container 1 at a position shifted in the longitudinal direction of the container 1 from the predetermined position where the lower protrusions 11 on the long side and the lower protrusions 12 on the short side of the upper container 1 are installed on the installation part 33 of the lower container 1, and then the upper container 1 is slid to the predetermined position to perform a slide stack. In other words, when performing a slide stack of containers 1, first the upper container 1 is placed diagonally on the lid 3 of the lower container 1 such that one of the lower protrusions 12 on the short side of the upper container 1 abuts against the sliding contact part 34 of the top plate 21 of the lower container 1, which is a part of the top plate 21 that is closer to the center of the top plate 21 than the regulating protrusion 24. In this state, the lower protrusion 11 on the long side of the upper container 1 may be brought into contact with the convex portion 23 on the short side of the lower container 1 (in a way that it is leaning against it at an angle), or the worker may hold it in a suspended position so that it does not come into contact with the lower container 1.
[0025] Furthermore, while maintaining the state in which the lower protrusion 12 on the short side abuts against the sliding contact portion 34, the upper container 1 is slid toward the specified position (bringing the lower protrusion 12 on the short side into sliding contact with the sliding contact portion 34). By performing a sliding displacement of a predetermined length, the lower protrusion 12 on the short side of the upper container 1 abuts against the regulating projection 24 of the lower container 1. At this time, since the central side (sliding contact portion 34 side) of the top plate portion 21 of the regulating projection 24 is an inclined portion 31, the lower protrusion 12 on the short side relatively smoothly overcomes the regulating projection 24 and is installed in the installation portion 33 (as shown in Figure 12). Also, as the lower protrusion 12 on the short side that has overcome the regulating projection 24 is installed in the installation portion 33, the lower protrusion 12 on the opposite side of the short side is also installed in the installation portion 33, positioned closer to the center of the top plate portion 21 than the lower protrusion 23 on the short side. In this way, the slide stacking of container 1 is completed.
[0026] As shown in Figures 2 and 3, the bottom wall portion 4 of this embodiment is shaped such that the portion including the central part of each long side portion and each short side portion is recessed one step towards the central part of the bottom wall portion 4 compared to the portion including each corner portion of the bottom wall portion 4. For this reason, the long side side wall portion 5 and short side side wall portion 6 provided along each side portion of the bottom wall portion 4, as well as the long side lower projection portion 11 and short side lower projection portion 12, have a shape in which the portion including the corner portion of the container body 2 protrudes outward from the container body 2 compared to the portion including the lateral central part of the long side side wall portion 5 and short side side wall portion 6, and the portion including the lateral central part of the long side lower projection portion 11 and short side lower projection portion 12.
[0027] Here, when the container 1 is slid and stacked, the portion of the lower protrusion 12 on the short side that includes the corner portion of the container body 2 comes into contact with the top plate portion 21 (sliding contact portion 34) of the lower container 1, while the portion of the lower protrusion 12 on the short side that includes the center portion in the lateral direction is separated from the top plate portion 21 (sliding contact portion 34) of the lower container 1 and does not come into contact with it, because the container body 2 is in an inclined position. In other words, the lower protrusion 12 on the short side includes a sliding portion 36 (a portion including the corner portion of the container body 2) that slides against the top plate portion 21 (sliding contact portion 34) of the lid 3 when the container 1 is slid stacked, and a friction-reducing shaped portion 37 (a portion including the central portion in the lateral direction of the lower protrusion 12 on the short side) which is formed adjacent to the sliding portion 36 by making the formation range of the sliding portion 36 shorter than the short side portion of the corresponding lower surface of the container body 2, and which can be separated from the top plate portion 21 and the inclined portion 31 of the lid 3 when the container 1 is slid stacked.
[0028] Furthermore, as shown in Figure 1, the top plate portion 21 of this embodiment has no steps, and the installation portion 33 and the sliding contact portion 34 are located on the same plane. As described above, since the portion of the lower projection portion 12 on the short side that includes the corner portion of the container body 2 is made into the sliding portion 36, a portion of the installation portion 33 where the lower projection portion 11 on the long side is installed when the container 1 is stacked overlaps with a portion of the sliding contact portion 34.
[0029] Furthermore, since the long-side protrusion 22 extends above the sliding contact portion 34 (top plate portion 21), as shown in Figure 7, when the containers 1 are slid and stacked, the short-side lower projection 12 (sliding portion 36) of the upper container 1 slides against the sliding contact portion 34 of the lower container 1, and the long-side lower projection 11 of the upper container 1 (the portion of the long-side lower projection 11 that is connected to the sliding portion 36 of the short-side lower projection 12 that slides against the sliding contact portion 34) comes into contact with the long-side protrusion 22 (inner wall portion 26) of the lower container 1, thereby restricting the relative displacement in the horizontal direction intersecting the direction of slide displacement.
[0030] As shown in Figures 5 to 7 and Figure 12, the lid 3 has a fitting projection 41 that protrudes downward from the top plate 21 on the central side of the top plate 21 (in this example, in the inner and outer circumference direction of the lid 3, on the inner circumference side of the lid 3 on the inner circumference side of the lid 3 on the inner circumference side of the protrusion inner wall 26, and on the outer side of the inner restricting portion 30, i.e., on the back side of the installation portion 33), and when the lid 3 is placed over the container body 2, at least a part of it is substantially fitted to the inside side of the opening of the container body 2. The fitting projection 41 has an insertion portion 42 corresponding to each corner of the opening of the container body 2 and a finger rest portion 43 connecting the insertion portions 42, and the insertion portions 42 extend downward beyond the finger rest portion 43. Furthermore, the lid 3 includes an inner circumferential reinforcing rib 44 that connects the parts of the fitting projection 41 corresponding to the pair of long sides of the lid 3 on the inner circumferential side of the fitting projection 41, and an outer circumferential reinforcing rib 45 that connects the fitting projection 41 and the protruding outer wall portion 28. The lower edges of the inner circumferential reinforcing rib 44 and the outer circumferential reinforcing rib 45 are at the same height as the lower edge of the finger grip portion 43. In other words, when the lid 3 is placed over the container body 2, the portion of the container body 2 including the upper flange portion 7 is inserted between the protruding outer wall portion 28 and the fitting projection 41 of the lid 3, and the lower edge of the outer circumferential reinforcing rib 45 of the lid 3 abuts against and is supported by the upper flange portion 7 of the container body 2. Furthermore, the insertion portion 42 of the fitting projection 41 of the lid 3 is inserted into the inner side of the container body 2.
[0031] Furthermore, the finger rest portion 43 of the fitting projection 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 rest portion 43 increases the strength and rigidity of the insertion portion 42, and on the lower surface of the lid 3, a portion is formed at a predetermined distance from the center of the top plate portion 21, including the long side and the center of the short side of the top plate portion 21, where the worker can place their fingers on the central side of the top plate portion 21.
[0032] In addition, as shown in Figure 6, in the vertical direction, the upper end of the inclined portion 31 (regulating projection 24) is at the same position (same height) as the upper ends of the long-side projection 22 and the short-side projection 23. In this embodiment, in the horizontal direction, the distance between the inner regulating portion 30 of the regulating projection 24 and the portion of the finger grip portion 43 of the fitting projection 41 that corresponds to the short side of the top plate portion 21 (hereinafter also referred to as the "short-side finger grip portion 43") is shorter than the distance between the short-side finger grip portion 43 and the outer wall portion 28 of the projection. As a result, the formation positions of the regulating projection 24 and the short-side finger grip portion 43 are not far apart in the horizontal direction. Also, as shown in Figure 4, a locking recess 46 is provided in the area including the central part of the short-side projection 23, which is locked in place with the lid fixing device 14. The locking recess 46 omits the upper wall portion 27 of the protrusion and the upper part of the outer wall portion 28 of the protrusion, while having a locking wall portion 47 that extends substantially horizontally. When the lid fastener 14 is in a locked state (rotated upward) to prevent the lid 3 from falling off, the elastic locking piece 48 of the lid fastener 14 presses against the upper surface of the locking wall portion 47.
[0033] Furthermore, as shown in Figure 8, a second container 51, which has the same configuration as container 1 but with smaller dimensions, can be placed on top of container 1, allowing for storage and transport of items contained in both container 1 and the second container 51. The short side width of the second container 51 is approximately half the long side width of container 1 (slightly shorter than half the width), and the long side width of the second container 51 is approximately the same as the short side width of container 1. Two second containers 51 can be placed side by side on the upper side of container 1 in the direction of the long side width of container 1.
[0034] When two second containers 51 are placed side-by-side on top of container 1, a pair of second short-side lower protrusions 52 and one second long-side lower protrusion 53 of the second containers 51 are placed on the installation portion 33 of container 1. As a result, the second long-side lower protrusion 53 and the second short-side lower protrusion 52 of the second containers 51 come into contact with the inner wall portion 26 of the protrusions 22 and 23 on the long side and short side of container 1, or with the inner restricting portion 30 of the restricting protrusion 24, or the second containers 51 come into contact with each other, thereby restricting the relative horizontal displacement between the stacked containers 1 and the second containers 51.
[0035] Furthermore, when placing the second container 51 on the container 1, it is also possible to perform a slide stack by first placing the second container 51 at a position offset from the specified position (where the pair of lower protrusions 52 on the second short side and one of the lower protrusions 53 on the second long side are installed on the installation part 33 of the container 1) in the longitudinal direction of the container 1, and then sliding it toward the specified position. That is, since there is a region between the pair of restricting protrusions 24 that allows the short side width of the second container 51, the second container 51 is placed between the pair of restricting protrusions 24 without tilting. Then, as shown in Figure 9, by sliding the second container 51 toward the specified position, the lower protrusions 53 on the second long side will move over the restricting protrusions 24 and be installed on the installation part 33. As described above, it is possible to perform a slide stack 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-reducing shape 37) slide against the top plate 21. However, 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 21, and the friction-reducing shape 37 of the second long-side lower protrusions 53 also moves away from the inclined portion 31 and the top plate 21. Furthermore, it is also possible to slide stack the second container 51 with the container 1 by placing the second container 51 in an inclined position such that one of the lower protrusions 53 on the second long side of the second container 51 abuts against the sliding contact portion 34, and the other lower protrusion 53 on the second long side is spaced upward from the container 1, and then sliding the second container 51 toward the specified position.
[0036] Furthermore, since the second container 51 has the same configuration as container 1, it is also possible to slide stack the second containers 51 together. This involves placing the second container 51 with its position shifted in the longitudinal direction and then sliding it. For this reason, the direction in which the second container 51 is slid and stacked on top of container 1 and the direction in which the second container 51 is slid and stacked on top of the second container 51 that is placed on top of container 1 intersect (are approximately perpendicular).
[0037] Furthermore, as shown in Figure 10, with respect to the container 1, there are two types of container bodies 2: a first container body 62 and a third container body 64, which has the same outer dimensions at the upper end as the first container body 62 but smaller outer dimensions at the lower end. Therefore, there are two types of container 1: a first container 61, which has a lid 3 placed over the first container body 62, and a third container 63, which has a lid 3 (the same lid 3 as the one placed over the first container 61) placed over the third container body 64. Furthermore, with respect to the first container body 62 and the third container body 64, configurations in which the outer dimensions of the upper end are the same size and the outer dimensions of the lower end are different include, for example, the third container body 64 having different inclination angles for the long side wall portion 5 and the short side wall portion 6 compared to the first container body 62, or even if the inclination angles are the same, the vertical width of the long side wall portion 5 and the short side wall portion 6 being different, or having a stepped shape 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.
[0038] As shown in Figure 12, when the first container body 62 is placed on the lid 3, the outer surface of the lower projection 12 (sliding part 36) on the short side of the first container body 62 and the convex part 23 (inner wall part 26) on the short side of the lid 3 are configured to come into contact. On the other hand, as shown in Figure 11, when the third container body 64 is placed on the lid 3, the inner surface of the lower projection 12 (friction-reducing shape part 37) on the short side of the third container body 64 and the inner restricting part 30 of the restricting convex part 24 of the lid 3 are configured to come into contact. Regarding the lower projection 11 on the long side, both the first container body 62 and the third container body 64 come into contact with the convex part 22 on the long side of the lid 3, thereby restricting relative displacement in the horizontal direction (the short side width direction of the container 1).
[0039] As described in detail above, according to this embodiment, when the containers 1 are stacked on top of each other, the lower protrusions 11 on the long side and the lower protrusions 12 on the short side of the upper container 1 come into contact with the inner wall portion 26 of the protrusions 22 on the long side and 23 on the short side of the lid 3 of the lower container 1, or the inner restricting portion 30 of the restricting protrusion 24, thereby restricting the relative horizontal displacement between the stacked containers 1. Therefore, the stacked state of the containers 1 can be stabilized.
[0040] Furthermore, when performing a slide stack, in which the upper container 1 is initially placed on the lid 3 of the lower container 1 at a position shifted in the longitudinal direction of the container 1 from the designated position, and then displaced to the designated position, the lower protrusion 12 on the short side of the upper container 1 abuts against the convex portion 22 on the long side of the lower container 1 during the slide stack, guiding the direction of the slide stack. This 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. Moreover, during the slide stack, the lower protrusion 12 on the short side of the upper container 1 abuts against the regulating convex portion 24 of the lower container 1. However, since the central side (sliding contact portion 34 side) of the top plate portion 21 of the regulating convex portion 24 is an inclined portion 31, the lower protrusion 12 on the short side of the upper container 1 can relatively easily overcome the regulating convex portion 24 of the lower container 1 and be displaced to the installation portion 33. Therefore, it is possible to improve the work efficiency when stacking containers 1 together.
[0041] Furthermore, the restricting protrusions 24 on the lid 3 are provided in pairs, corresponding to each short side of the top plate portion 21. Therefore, when the third container body 64 is placed on the lid 3 (for example, when stacking the third containers 63 together), the relative displacement between the containers 1 (for example, between the third containers 63) in the direction of the slide displacement of the slide stack (the longitudinal width direction of the container 1) can be restricted on both the one side and the other side in the direction of the slide displacement of the container 1. As a result, the stacked state of the containers 1 can be further stabilized.
[0042] In addition, the lower protrusion 12 on the short side is provided with a sliding part 36 that slides against the sliding contact part 34 of the lid 3 when the container 1 is slid and stacked, and a friction-reducing shaped part 37 that can be separated from the top plate part 21 and the inclined part 31 of the lid 3 when the container 1 is slid and stacked. As a result, the contact area between the upper container 1 (lower protrusion 12 on the short side) and the lower container 1 (top plate part 21 and inclined part 31) is reduced when the container 1 is slid and stacked, thereby reducing frictional resistance. Consequently, the upper container 1 can be slid and displaced more smoothly when the container 1 is slid and stacked, further improving the workability when stacking the containers 1.
[0043] Furthermore, the sliding portion 36 is provided in an area that includes the corner portion (on the bottom surface) of the container body 2. Therefore, even if the lower projection 12 (sliding portion 36) on the short side of the upper container 1 comes into contact with the protrusion 22 on the long side of the lower container 1 during slide stacking, it is possible to prevent the upper container 1 from extending laterally beyond the area above the lower container 1. Consequently, the slide stacking operation can be performed more stably, and it is possible to avoid a situation where, when the lower projection 12 on the short side of the upper container 1 goes over the restricting protrusion 24 of the lower container 1, the lower projection 12 on the short side interferes with the protrusion 22 on the long side of the lower container 1, and the upper container 1 cannot be installed in the installation portion 33 unless it is shifted in a direction intersecting the sliding displacement direction of the slide stack.
[0044] Furthermore, by providing a finger rest 43 on the lower side (fitting projection 41) of the lid 3, when a worker carries the lid 3 individually or stacked with other lids 3, they can grip the lid 3 by placing their fingers on the finger rest 43 and the inclined portion 31 of the restricting projection 24. In particular, when carrying multiple lids 3 stacked together, the multiple lids 3 can be gripped effectively by placing fingers on the finger rest 43, which is located slightly inward from the outer circumference of the lid 3, and the inclined portion 31 of the restricting projection 24. This prevents situations where multiple lids 3 spread out like a fan and cannot be gripped properly, such as when placing fingers on the inner wall portion 26 and the lower edge of the outer wall portion 28 of the short-side projection 23 located on or near the outer circumference of the lid 3. Therefore, the convenience of carrying the lid 3 can be improved.
[0045] In addition, in the vertical direction, the upper end of the inclined portion 31 (regulating projection 24) is at the same position as the upper ends of the long-side projection 22 and the short-side projection 23. Therefore, the regulating projection 24 is configured not to protrude too far upward, thereby suppressing damage to the regulating projection 24, and stabilizing the lower projection 12 on the short side of the upper container 1 when it crosses over the regulating projection 24 of the lower container 1 during slide stacking.
[0046] Furthermore, since the second container 51, which has a short side width of approximately half the long side width of container 1 and a long side width almost the same as the short side width of container 1, has the same configuration as container 1, it is possible to slide stack the second containers 51 together, and if an operator is familiar with the slide stacking of container 1, they can slide stack the second containers 51 together relatively easily. In addition, the second container 51 also has a second short side lower projection 52, and similar to the slide stacking of containers 1 together, it is also possible to slide stack the second container 51 on top of container 1 by sliding it in the same direction as the slide stacking of containers 1 together. Moreover, when the second container 51 is placed on top of container 1, and when the second containers 51 are stacked together, it is possible to prevent relative horizontal displacement between container 1 and the second container 51, and relative horizontal displacement between the second containers 51, thereby stabilizing the stacked state.
[0047] Furthermore, the container 1 is provided with a first container body 61 and a third container body 63, each comprising a first container body 62 and a third container body 64, which have different outer dimensions at their lower ends, and a common lid 3. This allows for stable sliding stacking of the containers 1, whether the first container 61 and the third container 63 are stacked by type or by combination of types, and also ensures stability when the containers 1 are stacked. Consequently, convenience can be improved.
[0048] Furthermore, the embodiment is not limited to the description above, and may be implemented as follows, for example. Of course, other applications and modifications not exemplified below are also possible.
[0049] (a) In the above embodiment, the restricting protrusions 24 are provided so as to extend parallel to the short-side protrusions 23 corresponding to each short side of the top plate portion 21, but the configuration is not limited to this, and it is sufficient if the configuration is located closer to the center of the top plate portion 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 may contribute to preventing relative horizontal displacement in a predetermined stacking state of the container 1.
[0050] For example, four regulating protrusions may be provided corresponding to the four corners of the top plate portion 21. For example, if each of the regulating protrusions 24 in the above embodiment is divided into two, an inclined portion 31 is provided on the central side in the longitudinal direction of the container 1, enabling a slide stack that slides along the longitudinal direction of the container 1. Furthermore, it becomes possible to place multiple small containers in the short-width direction of the container 1 (for example, four containers arranged by placing two in the short-width direction of the container 1 and two in the longitudinal direction of the container 1). The shape and size of the second containers 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 with a short width approximately 1 / 3 of the longitudinal width of the container 1. Furthermore, as a modified example of providing four restrictive protrusions corresponding to the four corners of the top plate portion 21, for example, an inclined portion 31 may be provided not only on the central side in the longitudinal width direction of the container 1 but also on the central side in the short width direction of the container 1 at each restrictive protrusion, thereby enabling not only a slide stack that slides along the longitudinal direction of the container 1 but also a slide stack that slides along the short direction of the container 1.
[0051] Furthermore, the restricting protrusions 24 do not necessarily have to be arranged to be symmetrical in a plan view. For example, the restricting protrusions may be provided continuously along one short side of the top plate portion 21 and intermittently along the other short side (for example, divided into two). In addition, the restricting protrusions may be provided to be asymmetrical in a plan view and rotationally symmetrical. Moreover, for example, the restricting protrusions may be provided corresponding to only one short side of the top plate portion 21. Furthermore, for example, the restricting protrusions may be provided corresponding to only one long side of the top plate portion 21.
[0052] (b) In the above embodiment, the long-side protrusions 22 and the short-side protrusions 23 are provided along the outer edge of the top plate portion 21 in a substantially rectangular ring shape without any breaks, but it is also possible to provide them intermittently (for example, omitting the portion of the short-side protrusions 23 that faces the restricting protrusions 24). Also, in the above embodiment, the top plate portion 21 is configured to be flat, but for example, the mounting portion 33 (outer periphery of the top plate portion 21) may be configured to be lower than the sliding contact portion 34 (inner periphery of the top plate portion 21). However, the sliding contact portion 34 is positioned lower than the upper end of the long-side protrusions 22.
[0053] (c) In the above embodiment, the container 1 may be configured such that, when stacked, when one short-side lower protrusion 12 abuts against the inner restricting portion 30 of the restricting projection 24 of the lower container 1, the other short-side lower protrusion 12 abuts against the inner wall portion 26 of the short-side projection 23 of the lower container 1. It is also possible to implement this in a container without the lid fastener 14. By providing the lid fastener 14, the lifting of the lid 3 during slide stacking can be prevented more reliably.
[0054] (d) In the above embodiment, the container body 2 and the lid 3 are made of polypropylene, but they may be made of other polyolefin resins (such as polyethylene), or synthetic resins other than polyolefins (for example, ABS resin, AES resin, acrylic resin, polycarbonate, etc.). [Explanation of Symbols]
[0055] 1...Container, 2...Container body, 3...Lid, 11...Long side lower protrusion, 12...Short side lower protrusion, 21...Top plate, 22...Long side convex part, 23...Short side convex part, 24...Restricting convex part, 26...Inner wall of convex part, 28...Outer wall of convex part, 30...Inner restricting part, 31...Inclined part, 33...Installation part, 34...Sliding contact part, 36...Sliding part, 37...Friction-reducing shape part, 51...Second container, 52...Second short side lower protrusion, 53...Second long side lower protrusion, 61...First container, 62...First container body, 63...Third container, 64...Third container body.
Claims
1. In a lid that is placed over a roughly box-shaped container body that opens upwards, The aforementioned cover is The top panel is roughly rectangular in plan view, Each side of the top plate portion or a nearby portion thereof has a protrusion that projects upward, The top plate portion includes a restricting projection that protrudes upward from a position on the inner circumference side of the protrusion, spaced apart from the protrusion. The restricting projection comprises an inner restricting portion that forms the side surface of the top plate portion, and an inclined portion that forms the central surface of the top plate portion and slopes downward toward the central side of the top plate portion. The top plate portion includes a sliding contact portion which is located on the central side of the top plate portion than the predetermined regulating protrusion, The lid comprises a lower wall portion extending downward from the outer periphery of the top plate portion or its vicinity, and a fitting projection that protrudes downward from the top plate portion on the central side of the top plate portion relative to the lower wall portion, and at least a portion of it is substantially fitted into the opening of the container body when the lid is placed over the container body, In the vertical direction, the lower end of the fitting projection is located at the same position as the lower end of the lower wall portion, or above the lower end of the lower wall portion. The fitting projection is provided with a finger rest on the central side of the top plate portion, which allows an operator to place their fingers on it. A cover 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 protrusion, or lower than the upper end of the protrusion.
2. A roughly box-shaped container body with an opening at the top, The lid according to claim 1, which is placed over the container body, In a container equipped with, When stacking the containers, a slide stack is possible in which the upper container is placed on the lid of the lower container at a position offset from the predetermined position where the upper container is placed on the lower container, and then the upper container is slid toward the predetermined position. The container is characterized in that the regulating protrusions are provided in correspondence with a pair of side edges of the top plate portion that extend in a direction substantially perpendicular to the direction of the sliding displacement.
3. A roughly box-shaped container body with an opening at the top, The lid according to claim 1, which is placed over the container body, In a container equipped with, A lid fixing device is provided on the upper part of the side wall of the container body to prevent the lid placed over the container body from falling off. The container is characterized in that the lid fixing device is formed in a U-shape in its vertical cross-section and has a curved surface at the bottom when locked in a state that prevents the lid from falling off.