Container and container group

Abstract

To provide a container capable of eliminating the need of attachment work by reducing the number of components such as a handle for holding up the container, and reducing a working process.SOLUTION: A container 1 comprises: a bottom face 2; a side wall 3 elected from the bottom face 2; and a finger hook rib 5 protruding inward from a reference line 8A of an inner dimension 8 of the side wall 3. A connection portion 2A of the side wall 3 and the bottom face 2 in the container 1 is set as a starting point. An inner dimension reference line 9A approximately along an inner face of the side wall 3 is virtually determined, and a finger hook part 5 protruding inward from the inner dimension reference line 9A is provided on the side wall 3. Since the inner dimension 8 of the container 1 at a position of the finger hook part 5 is made to be shorter than an inner dimension 9 at an upper end of the side wall 3, the container 1 is lifted upward with respect to a large container 11 when a user inserts a finger from an upper opening of the container 1 to apply a force 21 going upward from the bottom face 2 side of the container 1 to the finger hook rib 5.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a container having a bottom and a side wall rising from the bottom, which can be used, for example, for transportation or for draining water, and further relates to a group of containers in which the container is used as an inner container and a larger container can be attached to the outside of the inner container. [Background technology]

[0002] Conventional containers of this type include double containers equipped with an outer container and an inner container (sometimes called an "inner container"). The inner container is configured to be removable from the outer container so that food waste, for example, can be placed in the inner container, and after the water in the food waste is drained, the food waste can be placed in a bag and carried to a designated location for disposal (Patent Document 1 below). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3021906 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the case of Patent Document 1, a handle needs to be attached to an upper position of the inner container so that the inner container can be grasped and lifted when removing it from the outer container. This increases the number of parts such as handles and requires installation work, which increases the number of work processes.

[0005] The present invention has been made in view of the above-mentioned problems, and its object is to provide a container that can eliminate the need for installation work and reduce the number of work steps by reducing the number of parts, such as handles for lifting the container. In addition to reducing manufacturing costs as described above, the present invention also aims to provide a group of containers that, when a container is used as an inner container (i.e., when an inner container is attached to a large container), can lift the inner container within the large container with an extremely simple configuration. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, according to the invention of Means 1, in a container having a bottom surface and a side wall rising from the bottom surface, a reference line for an internal dimension is virtually defined which roughly follows the inner surface of the side wall, starting from the joint between the side wall and the bottom surface of the container and the vicinity thereof, and a finger hook portion is provided on the side wall which protrudes inward from this reference line for an internal dimension, thereby making the internal dimension of the container at the position of the finger hook portion (the distance between a pair of internal dimension reference lines) shorter than the internal dimension (the distance between a pair of internal dimension reference lines) at the upper end of the side wall (when the finger hook portion is not provided).

[0007] According to the invention of Means 2, in the invention of Means 1, it is preferable that a handle hole portion penetrating the side wall is provided above the side wall, and the finger hook portion is arranged between the handle hole portion and the upper end of the side wall (including the upper end of the side wall).

[0008] According to the invention of Means 3, in the invention of Means 1 or Means 2, it is preferable that the bottom surface of the container is circular in a planar view, and the finger hook portion is curved inwardly to follow the circular shape of the bottom surface in a planar view, and is formed to be thicker than the side wall (excluding the protrusion portion provided on the side wall).

[0009] According to the invention of Means 4, in a group of containers including a container having a bottom and a side wall rising from the bottom, and a large container having a large bottom larger than the bottom of the container and a side wall rising from the large bottom, the container is detachably attached to the inside of the large container so that at least a part of the side wall of the large container abuts against the side wall of the container, a reference line for an internal dimension is virtually defined starting from the joining point of the side wall and the bottom of the container and the vicinity thereof, and generally following the inner surface of the side wall, By providing a finger hook portion on the side wall of the container that protrudes inward from the internal dimension reference line, the internal dimension of the container at the position of the finger hook portion (the distance between a pair of internal dimension reference lines) is set shorter than the internal dimension (the distance between a pair of internal dimension reference lines) at the upper end of the side wall of the container (when the finger hook portion is not provided), and when an upward force is applied to the finger hook portion from the bottom side, the side wall of the container can be lifted upward relative to the side wall of the large container.

[0010] According to the invention of Means 5, in the invention of Means 3 or Means 4, a handle hole that penetrates the side wall is provided at the upper part of the side wall of the container, and the finger hook is arranged between the handle hole and the upper end of the side wall (including the upper end of the side wall), and a draining hole is provided in the bottom surface or side wall of the container, and feet that can be placed on the large bottom surface of the large container are provided below the bottom surface of the container, and it is further preferable that the containers can be stacked and attached inside the container. Effect of the Invention

[0011] According to the present invention, it is possible to provide a container that can eliminate the need for installation work and reduce the number of work steps by reducing the number of parts, such as handles for lifting the container. Furthermore, when the container is used as an inner container (i.e., when the inner container is attached to the inside of a larger container), a finger hook that protrudes inward from the reference line for the inner dimensions is provided on the side wall, and the inner container can be lifted inside the large container by the extremely simple operation of hooking a finger on the finger hook and lifting it. As a result, the inner container can be lifted inside the large container without using parts such as handles, and the manufacturing cost of a group of containers that use inner containers inside large containers can be reduced. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a front view of a container according to a first embodiment of the present invention, which conceptually illustrates an aspect in which the container is used as an inner container while a larger container is used on the outside of it in the first embodiment. [Diagram 2] FIG. 2 is a side view of a single container used as the inner container in FIG. [Diagram 3] 3 is a perspective view of the container shown in FIG. 2, seen obliquely from above. [Figure 4] 3 is a perspective view of the container shown in FIG. 2 as seen from the back side. [Diagram 5] FIG. 3 is an enlarged cross-sectional view taken along line II shown in FIG. 2. [Figure 6] FIG. 3 is a side view of a state in which a plurality of inner containers of FIG. 2 are stacked. [Figure 7] FIG. 11 is a perspective view of a container according to a second embodiment, as viewed obliquely from above. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, the first embodiment of the present invention will be described in detail with reference to Figs. 1 to 6. Fig. 1 conceptually shows a state in which the container according to the first embodiment is used as an inner container and a large container of a larger size is attached to the outside of the container. That is, in this figure, in order to easily recognize the positional relationship between the inner container and the large container, these containers are partially shown in perspective. Fig. 2 is a side view of a single container used as the inner container in Fig. 1, Fig. 3 is a perspective view of the container in Fig. 2 seen from diagonally above, and Fig. 4 is a perspective view of the container in Fig. 2 seen from the back side. Fig. 5 is a partially enlarged cross-sectional view of the container cut along the line I-I in Fig. 2. Fig. 6 is a side view of a state in which a plurality of inner containers in Fig. 2 are stacked. As a usage method of the inner container mounted inside the larger container, the configuration shown in FIG. 1 can be adopted, and it can be used as an all-purpose container for tasks such as washing food, soaking food, and draining water from food in a food factory. In this embodiment, a double structure of the inner container and the large container is adopted, but it is also possible to use the inner container alone as a container without using the large container. Also, if multiple containers can be stacked as shown in FIG. 6, a large number of containers can be stacked and transported at once, thereby reducing the cost of transporting a large number of containers.

[0014] 1 to 6, the container 1 of this embodiment has a bottom surface 2 having a circular shape in a plan view, a side wall 3 rising from the bottom surface 2, handle holes 4 (a pair of handle holes 4A and 4B) formed in the side wall 3, a finger hook rib 5 protruding from the side wall 3 toward the inside of the container as a finger hook, a number of drainage through holes 6 formed in the bottom surface 2, and a number of (four in this case) legs 7 provided on the lower side of the bottom surface 2 of the container 1. The container 1 is molded by injection molding or the like using synthetic resin (e.g., virgin materials such as olefins, PP, PE, etc., recycled plastic resins, resins containing bio-components, etc.) so that the components consisting of the bottom surface 2, the side wall 3, the handle holes 4, the finger hook rib 5, the drainage through holes 6, and the legs 7 can be integrally formed. The amount by which the finger rib 5 protrudes into the inside of the container 1 is determined as follows. That is, a reference line 9A for the internal dimension is virtually determined, starting from the joining point 2A (which may be in the vicinity of the joining point 2A) of the side wall 3 and the bottom surface 2 of the container 1. More specifically, the virtually determined reference line 9A for the internal dimension extends beyond the handle hole 4 at the point where the handle hole 4 is formed, as shown in Fig. 5, and even if there are protrusions (not shown) other than the finger rib 5 on the side wall, these are conceptually ignored and the reference line 9A for the internal dimension is used as it is, so that the reference line 9A is used only virtually.

[0015] 1, a reference line 9A for the inside dimension is defined at the upper end position of the side wall 3 where the finger hook 5 is not provided, and a paired reference line 9A for the inside dimension is defined at a symmetrical position (opposite side), and the distance between the reference line 9A for the inside dimension and the paired reference line 9A for the inside dimension is defined as the inside dimension 9 at the upper end position of the side wall 3 where the finger hook 5 is not provided. In addition, when the finger hook 5 protruding inward from the reference line 9A for the inside dimension is provided above the side wall 3 (specifically, at a position lowered a predetermined distance from the upper end of the side wall), a reference line 8A for the inside dimension is defined at the position of the finger hook rib 5, and a paired reference line 8A for the inside dimension is defined at a symmetrical position (opposite side) as shown in FIG. 1, and the distance between the reference line 8A for the inside dimension and the paired reference line 8A for the inside dimension is defined as the inside dimension 8 at the position of the finger hook 5 when the finger hook 5 is provided on the side wall 3. In addition, the inner dimension 8 of the container 1 is shorter than the inner dimension (the inner dimension reference line 9A and the distance between the paired inner dimension reference lines 9A) 9 at the upper end of the side wall 3 (when the finger hook portion 5 is not provided at the upper end of the side wall 3). With this structure, as shown in FIG. 6, when a user inserts a finger from the upper opening of the upper container 1A and applies an upward force 21 from the bottom surface 2 side of the upper container 1A to the finger hook rib 5 in a situation where multiple containers 1 are stacked (for example, the upper container 1A is stacked on the lower container 1B), the stacked upper container 1A is lifted upward relative to the lower container 1B. As a result, in this embodiment, the upper container 1A stacked on the lower container 1B can be lifted upward without adopting the structure of Patent Document 1 (where the handle is gripped to lift the container when removing the inner container).

[0016] The large container 11 also has a large bottom surface 12 larger than the bottom surface 2, a side wall 13 rising from the large bottom surface 12, and a lid 14 for covering the opening 11A of the large container 11. The large container 11 is desirably molded by injection molding or the like using a synthetic resin so that components such as the bottom surface 12, the side wall 13, and the lid 14 are integrally formed. In this case, the container 1 is removably attached inside the large container 11 so that the side wall 13 of the large container 11 and a part of the side wall 3 of the container 1 (in this case, the flange on the upper part of the side wall) abut against each other. Here, the flange on the upper part of the side wall may be formed, for example, toward the inner surface of the side wall 13 of the large container 11, or may be formed as an outward-facing flat plate around the outer periphery of the opening of the container 1.

[0017] If the length of the inside dimension of the side wall 13 of the large container 11 is only slightly larger than the length of the inside dimension of the side wall 3 of the container 1 (resulting in a narrow gap between the side wall 13 of the large container 11 and the side wall 3 of the container 1), fingers or the like will not be able to fit between the side wall 13 of the large container 11 and the side wall 3 of the container 1. Note that the configuration for mounting the container 1 inside the large container 11 so that at least a portion of the side wall of the large container 11 and the side wall of the container 1 abuts assumes a situation in which the user's fingers or the like will not fit between the side wall 13 of the large container 11 and the side wall of the container 1, and the present invention can be applied even in a situation in which the side wall 13 of the large container 11 and the side wall 3 of the container 1 do not abut at all and the distance (clearance) between the side wall 13 of the large container 11 and the side wall 3 of the container 1 is narrow. As a modified example, if large container 11 is set to have an elliptical shape when viewed in plan and container 1 is set to have a circular shape when viewed in plan, unlike when both large container 11 and container 1 are circular when viewed in plan, the diameter of the ellipse when viewed in plan will vary depending on the location, resulting in either a wide or narrow gap between side wall 13 of large container 11 and side wall 3 of container 1, and either a situation will arise in which a finger or the like can or cannot fit between side wall 13 of large container 11 and side wall 3 of container 1. However, this case is also considered to be included in the content in which at least a portion of the side wall of large container 11 and the side wall of container 1 abut.

[0018] As described above, finger hook rib 5 is formed to protrude inward from reference line 8A (see Figs. 1 and 5) of inside dimension 8 of side wall 3, and the cross-sectional shape of finger hook rib 5 is a rounded rectangular plate protruding inward. Reference line 8A of inside dimension 8 runs along the inner surface (slope in this case) of side wall 3 from bottom surface 2 toward the upper opening of container 1, as shown in Fig. 5, and in Fig. 1 it determines inside dimension 8 (length) of the opening of container 1 at the upper opening position of container 1 (upper end position of side wall 3). Here, the inner dimension at the bottom surface 2 of the container 1 is referred to as the effective inner dimension. The larger the effective inner dimension, the easier it is to store contents toward the inside of the container 1, so the effective inner dimension is set to be as large as possible. Also, the larger the inner dimension 8 (length) at the upper opening position (upper end position of the side wall 3) of the container 1, the larger the upper opening of the container 1 becomes, making it easier to store contents through the upper opening. On the other hand, if the protruding amount of the finger hook rib 5 protruding inward from the reference line 8A of the inner dimension 8 becomes large, it becomes an obstacle when storing contents through the upper opening of the container 1, so from the viewpoint of the entry and exit of the contents, it is desirable to set the protruding amount of the finger hook rib 5 in consideration of the inner dimension 8 (length) at the upper opening position (upper end position) of the container 1, and further to an extent that does not reach the effective inner dimension of the bottom surface 2 of the container 1 (i.e., the protruding position of the finger hook rib 5 is a position that is not shorter than the length of the effective inner dimension of the container).

[0019] In addition, the size of the handle hole 4 is desirably large enough to allow the user's hand to enter the handle hole 4 in order to facilitate the transport of the container 1. That is, as shown in FIG. 2, when the length X1 in the vertical direction and the length X2 in the horizontal direction are set, the larger the area of ​​the handle hole 4 (the product of the length X1 and the length X2), the greater the margin for the user's hand to enter the handle hole 4. On the other hand, the larger the size of the handle hole 4, the lower the mechanical strength of the side wall 3 tends to be. In addition, when the length X3 of the upper side wall (wall 10) is set, the larger the area of ​​the upper side wall (wall 10) (the product of the length X1 and the length X3), the greater the effect of reducing the strength reduction due to the formation of the handle hole 4 (effect of maintaining the mechanical strength of the wall). The upper side wall (wall 10) of the finger hanging rib 5 is provided only above the handle hole 4, and no wall is provided on either the left or right side of the handle hole 4, thereby reducing the weight of the entire container 1.

[0020] As a result of the above-mentioned study, it is appropriate to experimentally determine the amount of protrusion of the finger hook rib 5 inward from the reference line 8A (see Figs. 1 and 5) of the inside dimension 8 of the side wall 3 after verifying the strength taking into consideration the size of the handle hole 4 and the area of ​​the upper side wall (wall 10). That is, in the case of this embodiment, it was experimentally found that it is good to determine the cross-sectional shape of the finger hook rib 5 protruding inward (for example, by about several mm) from the reference line 8A of the inside dimension 8 of the container 1 shown in Fig. 1 under the following conditions: the finger hook rib 5 is located at a predetermined position (upper end position of the side wall 3) on the opening side of the container 1 as shown in Fig. 5, and the upper side wall (wall 10) of the handle hole 4 is located at a position spaced apart by a predetermined length (for example, about several cm) in the vertical direction and is set to a predetermined length (for example, about several tens of cm) in the circumferential (lateral) direction of the handle hole 4A(4). The reason for this is that when handle holes 4 (4A, 4B) are provided in the side wall 3, the mechanical strength of the entire side wall 3 is weakened, which may cause damage when the container 1 is used, but when a configuration is adopted in which the handle holes 4 protrude a predetermined length in the vertical direction of the upper side wall (wall 10) and further inward (for example, by several mm) from the reference line 8A of the inside dimension 8, breakage of the periphery of the handle hole 4 (upper side wall (wall 10) etc.) can be prevented. In particular, the finger rib 5 is curved inward so as to follow the circular shape of the bottom surface 2, and is formed to be thicker than the side wall 3 of the container 1 (at a position where there is no protrusion), so that the mechanical strength of the finger rib 5 can be increased. The amount of protrusion of the finger rib 5 (several mm) can be, for example, about 1 to 5 mm, preferably about 1 to 3 mm.

[0021] When lifting the upper container 1A in FIG. 6, if the handle hole 4 cannot be used, the user can insert his / her finger from the upper opening of the container 1 and apply an upward force 21 from the bottom surface 2 side of the container 1 to the finger hook rib 5, thereby lifting the container 1 upward relative to the large container 11. On the other hand, if the handle hole 4 can be used, the user can insert his / her hand from the outside of the handle hole 4, place the palm of his / her hand at position P3 (near the handle hole 4) in FIG. 5, place the pad of his / her finger at position P2 (intermediate position between positions P1 and P3) in FIG. 5, and further place the fingertip at position P1 (near the finger hook rib 5) in FIG. 5, thereby hooking his / her finger on the finger hook rib 5. Therefore, the user can carry the container 1 by gripping the upper side wall (wall 10) of the handle hole 4, etc., and therefore carry it in a state where it is easy to grip and convenient to use. If the container 1 is to be transported with a capacity exceeding its maximum capacity (load), the user's fingers can be placed on the finger hook rib 5 in the manner described above, allowing the user to check with their fingertips the shape of the upper side wall (wall 10) of the handle hole 4 and the finger hook rib 5, and the container can be transported with care to avoid breaking the upper side wall (wall 10) of the handle hole 4 and the finger hook rib 5. When inserting a hand from the outside of the handle hole 4 and placing a finger on the finger hook rib 5, in addition to the force 21 acting upward from the bottom surface 2 side of the container 1, a second force 22 in a direction along the side wall 3 is applied to the finger hook rib 5, and the position of the container 1 relative to the large container 11 may be adjusted.

[0022] In addition, the area of ​​the bottom surface 2 and the height of the side wall 3 (if the structure is such that the contents can be prevented from spilling out through the handle hole 4) determine the capacity of the container 1, and from the viewpoint of the convenience of the container 1, it is desirable to ensure as large a capacity as possible. In this case, it is better for the difference between the effective internal dimensions of the container 1 and the internal dimensions of the upper opening of the container 1 to be as small as possible. Moreover, the pair of left and right handle holes 4A, 4B are preferably placed symmetrically with respect to the center of container 1 to facilitate easy transportation of container 1. Furthermore, it is preferable to form a large number of drainage holes 6 to allow liquids such as water generated from food waste to drain. In particular, when the height of legs 7 is set to a height (e.g., about 10 cm) that assumes that liquids such as water that have fallen from food waste will not flow back upward and return to container 1, it takes into consideration the hygiene management of the user of container 1, such as preventing bad odors.

[0023] According to this embodiment, an internal dimension reference line 9A is virtually defined starting from the joining point 2A (which may be near the joining point) of the side wall 3 and bottom surface 2 of the container 1, and the side wall 3 is provided with a finger hook rib 5 that protrudes inward from this internal dimension reference line 9A. The internal dimension 8 of the container 1 at the position of the finger hook rib 5 (the distance between the pair of internal dimension reference lines 8A) is set shorter than the internal dimension 9 (the distance between the pair of internal dimension reference lines 9A) at the upper end of the side wall 3 (when the finger hook rib 5 is not provided). Therefore, a user can insert their fingers from the upper opening on the inside of the container 1 and apply an upward force 21 from the bottom surface 2 side of the container 1 to the finger hook rib 5, thereby easily lifting the container 1 upward relative to the large container 11. The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope disclosed in the claims, drawings, etc. In addition, configurations that can be created by adopting publicly known technologies not disclosed in the present embodiments can also be included in the technical scope of the present invention. For example, the finger hook rib may be formed immediately above the handle hole. The circumferential length of the finger hook rib may be formed to a length other than that of the above-described embodiments. The cross-sectional shape of the finger hook rib may be a shape other than that of the above-described embodiments. The finger hook portion may be composed of multiple protrusions other than the finger hook rib 5. The finger hook rib and the protrusion shape may have a slope in part (including either or both of a slope facing left and right and a slope facing up and down), and may further have a configuration in which the lower side is flat and perpendicular to the side wall. A structure in which a rib is provided on the side opposite the finger hook rib 5 on the side wall 3 may be adopted, or a structure in which no rib is provided may be adopted. Furthermore, when the finger hook rib is formed on the inside of the opening end of the container, a similar peripheral rib may be formed on the outside, and the cross section may be formed in a T-shape. In this case, a configuration in which the finger hook rib is shorter than the peripheral rib may be adopted.

[0024] The container of the present invention may adopt a structure other than the double structure of the medium container and the large container. The bottom surface of the container may be, for example, rectangular rather than approximately circular in plan view. A draining through hole may be formed in the side wall other than the bottom surface of the container, or both the bottom surface and the side wall of the container may be formed. If the container is not used as a draining container, it is not necessary to form a draining through hole. The configuration for mounting the container 1 inside the large container 11 may be such that a part of the side wall 3 of the container 1 abuts against the side wall 13 of the large container 11, or such that the entire side wall is in close contact with the side wall 13. Since the container 1 is configured to taper from the opening side toward the bottom surface 2, the container 1 is different from a configuration in which the dimensions are uniform from the opening side toward the bottom surface 2 (a vertical wall structure), and the reference line 8A of the inner dimension 8 of the side wall 3 is difficult to uniquely determine. However, the joining point 2A of the side wall 3 and the bottom surface 2 of the container 1 can be uniquely determined, and the reference line 9A for the inner dimension (defined virtually) starting from the joining point 2A and roughly following the inner surface of the side wall 3 can also be uniquely determined.

[0025] Next, the second embodiment will be described. As shown in Fig. 7, the container 30 of the second embodiment has a bottom surface 31 having an angular shape in a plan view, horizontal side walls 32 and vertical side walls 33 rising from the bottom surface 31, a handle hole 34 drilled in the vertical side walls 33, and a finger hanging rib 35 protruding from the vertical side walls 33 to the inside of the container. The container 30 is molded by injection molding or the like using a synthetic resin (for example, virgin materials such as olefins, PP, PE, etc., recycled plastic resins, bio-component blended resins, etc.) so that the components consisting of the bottom surface 31, the horizontal side walls 32, the vertical side walls 33, the handle hole 34, the finger hanging rib 35, etc. can be integrally formed. The finger hanging rib 35 is formed so as to protrude inward from the reference line 38A of the vertical side walls 33, and the cross-sectional shape of the finger hanging rib 35 is preferably the same as that of the first embodiment. The amount by which the finger hook rib 35 protrudes inwardly of the container 30 is determined as follows. That is, an internal dimension reference line 38A is virtually determined starting from a joining point B (which may be in the vicinity of the joining point B) of the vertical side wall 33 and the bottom surface 32 of the container 30, and a finger hook 35 is provided on the vertical side wall 33, protruding inwardly from the internal dimension reference line 38A. The internal dimension 39 (the distance between the pair of internal dimension reference lines 39A) of the container 30 at the position of the finger hook 35 is set shorter than the internal dimension (the distance between the pair of internal dimension reference lines 38A) 38 at the upper end of the vertical side wall 33 (when the finger hook 35 is not provided). Therefore, a user can insert a finger from an upper opening on the inside of the container 30 and apply an upward force from the bottom surface 32 side of the container 30 to the finger hook rib 35, thereby easily lifting the container 30 upward.

[0026] The following supplementary notes are provided. Supplementary Note 1 is as follows: According to the invention described in Supplementary Note 1, in a container having a bottom surface and a side wall rising from the bottom surface, a reference line for an internal dimension is virtually defined that starts from the joint of the side wall and the bottom surface of the container and is generally along the inner surface of the side wall, and a finger hook that protrudes inward from the reference line for the internal dimension is provided on the side wall, so that the internal dimension of the container at the position of the finger hook (the distance between a pair of reference lines for the internal dimension) is made shorter than the internal dimension (the distance between a pair of reference lines for the internal dimension) at the upper end of the side wall (when the finger hook is not provided). Note that it is preferable to position the finger hook on the opening side of the container (for example, at a predetermined position near the upper end of the side wall). The amount of inward protrusion of the finger hook may be a configuration in which it protrudes from the reference line of the internal dimension by, for example, several mm, or may be a configuration in which it protrudes by a thickness greater than that.

[0027] According to the invention of Supplementary Note 2, in Supplementary Note 1, a handle hole penetrating the side wall is provided above the side wall, and the finger hook is disposed between the handle hole and the upper end of the side wall. It is preferable that a wall of a predetermined length is formed between the handle hole and the side wall of the finger hook, and the finger hook is preferably formed by a predetermined length in the lateral direction of the handle hole.

[0028] Supplementary Note 3 is as follows: According to the invention of Supplementary Note 1 or 2, it is preferable that the bottom surface of the container has a circular shape in a plan view, and the finger hook portion is curved inwardly so as to follow the circular shape of the bottom surface in a plan view, and is formed to be thicker than the wall thickness of the side wall (excluding the protrusion provided on the side wall).

[0029] According to the invention of appendix 4, a group of containers includes a container having a bottom and a side wall rising from the bottom, and a large container having a large bottom larger than the bottom of the container and a side wall rising from the large bottom, and the container is detachably attached to the inside of the large container so that at least a part of the side wall of the large container abuts against the side wall of the container. A reference line for an internal dimension is virtually defined starting from the joining point of the side wall and the bottom of the container and the vicinity thereof, and generally follows the inner surface of the side wall. By providing a finger hook portion on the side wall of the container that protrudes inward from the internal dimension reference lines, the internal dimension of the container at the position of the finger hook portion (the distance between a pair of internal dimension reference lines) is set to be shorter than the internal dimension (the distance between a pair of internal dimension reference lines) at the upper end of the side wall of the container (when the finger hook portion is not provided), and when an upward force is applied to the finger hook portion from the bottom side, the side wall of the container can be lifted upward relative to the side wall of the large container. In addition, the configuration in which the container is removably attached inside the large container so that at least a portion of the side wall of the large container abuts against the side wall of the container assumes a situation in which the user's fingers, etc. cannot get between the side wall of the large container and the side wall of the container. Even if the side wall of the large container does not abut against the side wall of the container at all, cases in which the distance (clearance) between the side wall of the large container and the side wall of the container is narrow are also included in the technical idea of ​​Appendix 4.

[0030] According to the invention of Supplementary Note 5, in Supplementary Note 4, the bottom surface of the container has a circular shape in a plan view, and the finger hook portion is curved inwardly so as to follow the circular shape of the bottom surface in a plan view, and is formed to be thicker than the side wall (excluding the protrusion provided on the side wall). By adopting such a configuration, the mechanical strength of the side wall of the container can be increased.

[0031] According to the invention of Supplementary Note 6, in Supplementary Note 4 or Supplementary Note 5, a handle hole penetrating the side wall is provided at the top of the side wall of the container, the finger hook is disposed between the handle hole and the upper end of the side wall (including the upper end of the side wall), a draining through hole is provided at the bottom or side wall of the container, legs are provided below the bottom of the container so that the containers can be placed on the large bottom of the large container, and the containers can be stacked and attached inside the container. By adopting such a configuration with draining through holes and legs, liquid such as water that falls from inside the container does not flow back upward and return to the container, so that the container takes sanitation management into consideration.

[0032] According to the invention of Appendix 7, in any one of Appendixes 4 to 6, a handle hole that penetrates the side wall is provided above the side wall, and the finger hook portion is arranged between this handle hole and the upper end of the side wall. [Explanation of symbols]

[0033] 1 container, 2 bottom surface, 2A joint portion, 3 side wall, 4 (4A, 4B) ·· Handle hole, 5 ·· Finger hook rib (finger hook part), 7·· Leg, 8·· Inner dimension (distance between paired inner dimension reference lines 8A), 8A··Inner dimension reference line, 9··Inner dimension (distance between paired inner dimension reference lines 9A), 9A··Inner dimension reference line, 11··Large container, 12··Large bottom surface, 13... side wall, 21... force, 30... container, 31... bottom, 33 vertical side wall, 34 handle hole, 35 Finger hook rib (finger hook part), 38A Inner dimension reference line, 38: Inner dimension (the distance between the pair of inner dimension reference lines 38A), 39A··Inner dimension reference line, 39··Inner dimension (distance between paired inner dimension reference lines 39A),

Claims

1. A container having a bottom surface and a side wall extending from the bottom surface, A container characterized in that an internal dimension reference line is virtually defined, starting from the joint point of the side wall and bottom surface of the container and the vicinity thereof, and a finger hook portion is provided on the side wall that protrudes inward from this internal dimension reference line, thereby making the internal dimension of the container at the position of the finger hook portion (the distance between a pair of internal dimension reference lines) shorter than the internal dimension (the distance between a pair of internal dimension reference lines) at the upper end of the side wall (when the finger hook portion is not provided).

2. a handle hole penetrating the side wall is provided above the side wall; 2. The container according to claim 1, wherein the finger hook is disposed between the handle hole and the upper end of the side wall (including the upper end of the side wall).

3. The container according to claim 1 or 2, characterized in that the bottom surface of the container is circular in a planar view, the finger hook portion is curved inwardly to follow the circular shape of the bottom surface in a planar view, and is formed to be thicker than the side wall (excluding the protrusion portion provided on the side wall).

4. a container having a bottom surface and a side wall extending from the bottom surface; A large container having a large bottom surface larger than the bottom surface of the container and a side wall rising from the large bottom surface, In a group of containers in which the containers are removably attached inside the large container such that at least a portion of a side wall of the large container abuts against a side wall of the container, A reference line for an internal dimension is virtually defined, starting from the joining point of the side wall and the bottom surface of the container and the vicinity thereof, and the reference line for an internal dimension is virtually defined, and a finger hook portion is provided on the side wall of the container, protruding inward from the reference line for an internal dimension, so that the internal dimension of the container at the position of the finger hook portion (the distance between the pair of internal dimension reference lines) is set shorter than the internal dimension (the distance between the pair of internal dimension reference lines) at the upper end of the side wall of the container (when the finger hook portion is not provided); A group of containers characterized in that, when an upward force is applied to the finger grip portion from the bottom side, the side wall of the container can be lifted upward relative to the side wall of the large container.

5. A handle hole penetrating the side wall is provided at an upper portion of the side wall of the container, and the finger hook is disposed between the handle hole and the upper end of the side wall (including the upper end of the side wall), The bottom or side wall of the container is provided with a through hole for draining, and a foot portion that can be placed on the large bottom surface of the large container is provided below the bottom surface of the container, and further 5. The container group according to claim 4, characterized in that the containers can be stacked and mounted inside the container.

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