Lid body

Abstract

To provide a lid body whose height can be reduced when lid bodies are stacked on top of each other.SOLUTION: A lid body 5 includes: a lid main body 11 capable of closing an opening of a container body; and a lock member 12 capable of changing between a locked state and an unlocked state. The lid main body 11 includes: a skirt part 14 extending downward from an outer periphery of the lid main body 11; and an attachment part 17 to which the lock member 12 can be attached. The skirt part 14 is provided with a notch part 14a extending upward from a lower edge of the skirt part 14 at a position corresponding to the attachment part 17. The lock member 12 comprises an upper piece 21 supported so as to be slidably displaceable in the inner and outer circumferential directions of the lid main body 11 relative to the attachment part 17, and a lock piece 23 which is engaged with an upper flange part 9 of a container 1 via the notch part 14a when in a lock state. When the lid bodies 5 are stacked on top of each other, a part of the upper piece 21 of the lock member 12 of the lid body 5 on a lower stage side is inserted relatively into the notch part 14a of the lid body 5 on an upper stage side.SELECTED DRAWING: Figure 15

Description

[Technical field]

[0001] The present invention relates to a lid for opening and closing an opening of a container. [Background technology]

[0002] Conventionally, in a container having a container body that opens upward and a lid body that opens and closes the opening of the container body, a technique is known in which the lid body is placed over the container body and a locking member provided on the lid body is set in a locked state to prevent the lid body from accidentally coming off the container body (see, for example, Patent Document 1, etc.). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-169021 A Summary of the Invention [Problem to be solved by the invention]

[0004] Furthermore, with regard to the container described in Patent Document 1, the container body has a flange portion that protrudes outward from the upper edge of the container body, and the lid body has a skirt portion that is arranged to surround the flange portion when the lid body is placed on the container body. Furthermore, the locking member is provided at a predetermined position on the outer periphery of the lid body, and is configured to be slidable inward and outward relative to the outer periphery of the lid body. In addition, the skirt portion is provided with a hole portion into which the retaining piece of the locking member can be inserted, and by inserting the retaining piece into the hole portion, the retaining piece is engaged with the underside of the flange portion, and the relative upward displacement of the lid body with respect to the container body is restricted.

[0005] In addition, when multiple containers without articles contained therein are transported, stored, etc., it is known to separate the container bodies from the lids and stack the container bodies and the lids on top of each other. However, as described in Patent Document 1, when the lids are provided with locking members, there is a concern that the configuration related to the locking members may interfere with each other when the lids are stacked on top of each other.

[0006] The present invention has been made to solve the problems exemplified above, and its object is to provide a lid body that can minimize the height when stacked on top of each other. [Means for solving the problem]

[0007] The following describes each of the means suitable for achieving the above objects. Note that, as necessary, the specific effects of the corresponding means will be added.

[0008] Means 1. A lid body having a lid body capable of closing an opening of a container and a locking member configured to be capable of changing between a locked state and an unlocked state, the lid body includes a skirt portion extending downward from an outer circumferential edge of the lid body, and a mounting portion provided at a predetermined position on the outer circumferential edge of the upper surface side of the lid body and capable of mounting the locking member; The skirt portion is provided with a notch portion extending upward from a lower edge portion of the skirt portion at a position corresponding to the mounting portion, the locking member includes an upper piece supported on the mounting portion so as to be slidable or rotatable in an inward / outward direction relative to an outer peripheral edge of the lid body, a locking piece that is engaged with an engaged portion of the container via the notch when in the locked state, and a side wall connecting the upper piece and the locking piece; A lid body characterized in that, when the lid bodies are stacked on top of each other with the locking piece inserted into the cutout portion, at least a portion of the locking member of the lower lid body is inserted relative to the cutout portion of the upper lid body and is positioned vertically overlapping the locking member of the upper lid body.

[0009] According to the first means, when the locking member is installed on the outer peripheral edge of the upper surface of the lid body and the lid bodies are stacked (stacked) with the locking piece inserted into the notch, the height of the stacked lid bodies can be lowered compared to a configuration in which the locking member of the lower lid body abuts on the lower edge of the skirt of the upper lid body. Therefore, it is possible to provide a locking mechanism (without complicating the shape of the container body) in accordance with the basic shape of the container (container body) (a configuration having a flange portion protruding outward from the upper edge of the container body that opens upward) and, without making the thickness of the locking member thinner than necessary, the height of the stacked lid bodies can be made as low as possible. As a result, the lid bodies can be efficiently stacked and efficiently transported and stored.

[0010] It may also be configured such that "when the lids are stacked, the abutting portion of the lid on the upper side abuts against the abutted portion of the lid on the lower side, the lid on the upper side is supported by the lid on the lower side, and the locking member is not included in the abutting portion and the abutted portion." In this case, when the lids are stacked, the locking member of the lid on the lower side can be prevented from pressing against the lid on the upper side (including the locking member). Therefore, interference between the locking member of the lid on the lower side and the lid on the upper side is avoided, and the effect of lowering the height of the lids when stacked is more reliably achieved while avoiding damage and deformation to the locking member and the periphery of the mounting portion.

[0011] Means 2. The lid body described in Means 1, characterized in that a protrusion portion is provided above the mounting portion, extending in a direction along the outer peripheral edge portion of the lid body so as to include at least the area in which the cutout portion is formed, and which is connected to the mounting portion.

[0012] Since the skirt portion has a cutout corresponding to the area where the mounting portion is formed, there is a concern that the strength and rigidity of the area around the mounting portion may decrease. In this regard, according to Means 2, by providing a protrusion that extends at least to the area where the cutout is formed and is connected to the mounting portion, it is possible to reinforce the area around the mounting portion.

[0013] Means 3. The lid body has protrusions protruding upward from a plurality of points on the upper surface side of the lid body along the outer periphery of the lid body, The attachment portion is provided between the protrusions, The protrusions are provided so as to connect the protrusions, The lid according to Means 2, wherein an extension portion is provided extending horizontally from at least a part of the protrusion portion.

[0014] According to Means 3, it is possible to further increase the strength and rigidity of the protrusions and, in turn, of the periphery of the mounting part. Also, when attaching or detaching the lid body to or from the container body, stacking the lid bodies, or removing the stacked state, the lid body can be moved by hooking the fingertips on the extensions, thereby improving workability, etc.

[0015] Means 4. The lid according to Means 3, wherein the upper end of the protrusion is located lower than the upper end of the convex portion.

[0016] According to Means 4, when the lid bodies are stacked, it is possible to prevent the underside of the upper lid body from abutting against the protrusion portion of the lower lid body (because the underside of the upper lid body abuts against the convex portions on both sides before abutting against the protrusion portion of the lower lid body), thereby preventing loads, etc. from acting on the mounting portion via the protrusion portions.

[0017] Means 5. The locking member has an operating protrusion protruding upward from the upper piece, A lid body described in any one of means 1 to 4, characterized in that when the lid bodies are stacked on top of each other, the operating protrusion of the lower lid body is configured to fit within the formation range of the cutout portion of the upper lid body.

[0018] According to the fifth aspect, the locking member is provided with an operating protrusion, thereby improving the operability of the locking member. Furthermore, when the lids are stacked, even if the operating protrusion of the locking member of the lower lid is positioned below the skirt portion of the upper lid, interference between the operating protrusion (locking member) of the lower lid and the upper lid can be avoided. Therefore, the height of the stacked lids can be more reliably reduced while avoiding damage and deformation to the locking member and the periphery of the mounting portion.

[0019] It is also acceptable for "the operating protrusion to be disposed inward in the inward / outward direction relative to the outer peripheral edge of the lid body relative to the side wall." In this case, when the lids are stacked, a gap into which an operator can insert his / her fingertips can be formed between the upper piece of the locking member of the lower lid and the locking piece of the locking member of the upper lid, and the operator can hook his / her fingertips on the underside of the locking piece of the upper lid. This improves the ease of operation when stacking or unstacking the lids. [Brief description of the drawings]

[0020] [Figure 1] FIG. 2 is a perspective view showing the container with the opening closed. [Diagram 2] FIG. 2 is a perspective view showing the upper surface side of the lid main body. [Diagram 3] FIG. 4 is a perspective view showing the underside of the lid main body. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. 4 is a partially enlarged perspective view showing the periphery of the mounting portion with the locking member removed. [Figure 7] 11 is a partially enlarged perspective view showing the peripheral portion on the rear side of the mounting portion with the locking member removed; FIG. [Figure 8] FIG. 4 is a partially enlarged perspective view showing the periphery of the mounting portion with the locking member attached; [Figure 9]11 is a partially enlarged perspective view showing the peripheral portion on the rear side of the mounting portion with the locking member attached; FIG. [Figure 10] 13 is a partially enlarged plan view showing the periphery of the mounting portion of the container when the locking member is in a locked state. FIG. [Figure 11] FIG. 4 is a partially enlarged side view showing the periphery of the mounting portion of the lid body. [Figure 12] 11 is a partially enlarged cross-sectional view (cross-sectional view taken along line AA in FIG. 10) of the container in which the locking member is in a locked state. [Figure 13] 11 is a partially enlarged cross-sectional view of the container with the locking member in an unlocked state. FIG. [Figure 14] 11 is a partially enlarged cross-sectional view (cross-sectional view taken along line BB in FIG. 10) of the container in which the locking member is in a locked state. [Figure 15] FIG. 4 is a partially enlarged cross-sectional view showing a state in which the lid bodies are stacked. [Figure 16] FIG. 4 is a partially enlarged side view showing the state in which the lid bodies are stacked. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] An embodiment will be described below with reference to the drawings. As shown in Fig. 1, Fig. 12, etc., the container 1 is in the shape of a substantially square box that opens upward and includes a container body 2 having a storage section 3 capable of storing items therein, and a lid body 5 that opens and closes an opening 4 of the container body 2. The lid body 5 of this embodiment is configured to be detachable from the container body 2.

[0022] The container body 2 includes a bottom wall component (not shown) having a substantially rectangular shape in plan view, long side sidewalls 7 extending upward from a pair of opposing long side edges of the bottom wall component, short side sidewalls 8 extending upward from a pair of opposing short side edges of the bottom wall component, upper flanges 9 (see FIG. 12, etc.) protruding substantially horizontally from upper edges of the long side sidewalls 7 and the short side sidewalls 8 toward the outside of the container body 2, and a lower flange 10 protruding outward from the outer surfaces of the long side sidewalls 7 and the short side sidewalls 8 at a position above the lower ends of the long side sidewalls 7 and the short side sidewalls 8. The container body 2 of this embodiment is integrally formed from polypropylene.

[0023] 1 to 3, the lid body 5 includes a lid body 11 capable of closing the opening 4 of the container body 2, and a locking member 12 configured to be changeable between a locked state that prevents the lid body 5 from being removed from the container body 2 and an unlocked state that allows the lid body 5 to be attached to and detached from the container body 2. The lid body 11 includes a lid base portion 13 having a generally rectangular shape in a plan view, a skirt portion 14 extending downward from the outer periphery of the lid base portion 13, and protrusions 15 protruding upward from multiple points on the upper surface side of the lid base portion 13 along the outer periphery of the lid base portion 13.

[0024] The protrusion 15 in this embodiment is provided at a position slightly displaced (by a distance of about the thickness of the skirt portion 14) inward (toward the center of the lid base portion 13) from the outer peripheral edge of the lid base portion 13 (see FIG. 6, etc.). With this configuration, the lid base portion 13 is also present on the outer side in the inner / outer direction with respect to the outer peripheral edge of the lid body 11 than the protrusion 15 (hereinafter, the "inner / outer direction with respect to the outer peripheral edge of the lid body 11" is also simply referred to as the "inner / outer direction of the lid body 11", the "outer side in the inner / outer direction of the lid body 11" is also simply referred to as the "outer peripheral side of the lid body 11", and the "inner side in the inner / outer direction of the lid body 11" is also simply referred to as the "inner peripheral side of the lid body 11"). (Hereinafter, the portion of the lid base portion 13 located on the outer peripheral side of the lid body 11 than the protrusion 15 is also referred to as the "top outermost peripheral portion 13a").

[0025] As shown in FIG. 3, the protrusion 15 is provided with a cross section of a substantially U-shape that opens downward so as to bulge the target portion of the lid base portion 13 upward, and the back side of the protrusion 15 is provided with back side reinforcement ribs 16 at multiple locations in the circumferential direction of the lid body 11. The inner dimension of the skirt portion 14 when the lid body 5 is viewed from the bottom is configured to be slightly larger than the outer dimension of the container body 2 (upper flange portion 9) when the container body 2 is viewed from above. Then, by covering the container body 2 with the lid body 5, the back side reinforcement rib 16 and the like are supported by abutting against the upper surface of the upper flange portion 9, and the skirt portion 14 is disposed so as to surround the upper flange portion 9 (see FIG. 14, etc.). In addition, when the lid body 5 is covered with the container body 2, the outer edge portion of the upper flange portion 9 abuts against or is close to the skirt portion 14, thereby restricting the relative displacement of the lid body 5 with respect to the container body 2 in the horizontal direction.

[0026] Further, as shown in FIG. 2, FIG. 8, etc., a portion where the protrusion 15 is not provided is provided in a range including the center of each short side of the lid body 11, and the portion is provided with an attachment portion 17 to which the locking member 12 can be attached. In addition, as shown in FIG. 6, FIG. 7, FIG. 11, etc., the skirt portion 14 is provided with a notch portion 14a extending upward from the lower edge of the skirt portion 14 at a position corresponding to the attachment portion 17. As shown in FIG. 11, in this embodiment, in the direction along the outer peripheral edge of the lid body 11 (the circumferential direction of the lid body 11), the notch portion 14a is provided in approximately the same range as the range in which the attachment portion 17 is provided. Also, in the direction along the outer peripheral edge of the lid body 11, the upper portion of the skirt portion 14 remains in the formation range of the notch portion 14a, and the skirt portion 14 is provided continuously around the entire circumference of the outer peripheral edge of the lid body 11. The lid body 11 is integrally formed of polypropylene. The locking member 12 is integrally formed from polyamide (nylon).

[0027] 6, 10, 12, etc., the mounting portion 17 includes a mounting frame portion 18 that protrudes upward from the lid base portion 13 and has a generally U-shape that opens to the outer periphery side of the lid main body 11 in a plan view, and a mounting connection portion 19 that connects upper portions of portions of the mounting frame portion 18 that extend in parallel to each other. The mounting frame portion 18 is provided from a position on the inner periphery side of the lid main body 11 relative to the convex portion 15 in the inner / outer periphery direction of the lid main body 11 to a position displaced a distance approximately equal to the thickness of the skirt portion 14 toward the inner periphery of the lid main body 11 relative to the outer periphery of the lid base portion 13 (the same position as the surface of the convex portion 15 on the outer periphery side of the lid main body 11). In addition, the mounting connection portion 19 is provided in the range from near the center of the width direction of the protrusion 15 to the outer periphery of the lid body 11 in the inner and outer periphery direction of the lid body 11, and an operation-permitting notch portion 19a is provided in the mounting connection portion 19 in a range including the center of the edge portion on the outer periphery of the lid body 11 to make it easier to operate the locking member 12.

[0028] As shown in Figures 4, 5, 8, 9, etc., the locking member 12 is inserted between the lid base portion 13 in the area surrounded by the mounting frame portion 18 and the mounting connecting portion 19, and thereby is supported so as to be slidably displaceable in the inner and outer circumferential directions of the lid body 11 relative to the mounting portion 17, a side wall 22 extending downward from the end of the upper piece 21 on the outer circumferential side of the lid body 11, and a locking piece 23 extending from the lower end of the side wall 22 toward the inner circumferential side of the lid body 11.

[0029] When the lid body 5 is placed on the container body 2, the locking member 12 is displaced toward the outer periphery of the lid body 11, and the entire locking piece 23 is removed from the notch portion 14a and placed on the outer periphery of the lid body 11 (as shown in FIG. 13). This places the locking member 12 in an unlocked state that allows the lid body 5 to be displaced relative to the container body 2 (attachment / detachment). Then, as shown in FIG. 13, the locking piece 23 of the locking member 12 is placed below the upper flange portion 9 by placing the lid body 5 on the container body 2. Furthermore, as shown in FIG. 12, by displacing the locking member 12 of the lid body 5 placed on the container body 2 toward the inner periphery of the lid body 11, the locking piece 23 is inserted into the notch portion 14a and placed in an engaged state on the lower surface side of the upper flange portion 9 as the engaged portion of the container body 2. This restricts the upward relative displacement of the lid body 5 with respect to the container body 2, and the locking member 12 is placed in a locked state.

[0030] 13, upper piece 21 is provided with a restricting portion 24 that, when locking member 12 is in the unlocked state, gets caught on mounting connecting portion 19 to prevent locking member 12 from falling off lid body 11 (restricts displacement of locking member 12 toward the outer periphery of lid body 11). Also, a portion of locking piece 23 on the inner periphery of lid body 11 is shaped to be inclined downward toward the inner periphery of lid body 11, making it easier to insert locking piece 23 below upper flange portion 9 when locking member 12 is in the locked state.

[0031] As shown in Fig. 1, in this embodiment, the mounting portion 17 is provided at a position offset from the center of each short side edge of the lid body 11. Therefore, although the container body 2 is provided with a reinforcing rib 26 (see Fig. 14) extending downward from the lower surface of the upper flange portion 9 at the center of the short side wall portion 8 in the width direction, interference between the reinforcing rib 26 and the locking member 12 (locking piece 23) is avoided. Also, as shown in Fig. 11, etc., the skirt portion 14 of the lid body 11 extends downward beyond the locking piece 23 of the mounting portion 17, so that when the lid body 5 is installed on an installation surface such as a floor surface, the skirt portion 14 comes into contact with the installation surface, and the application of a load or the like to the mounting portion 17 is avoided. Furthermore, by stacking the containers 1 vertically (stacking), the lower surface of the container body 2 of the upper container 1 abuts against the lid base portion 13 of the lid body 5 of the lower container 1, and the lower surface of the lower flange portion 10 of the upper container 1 abuts against the upper surface of the convex portion 15 of the lower container, so that the upper container 1 is supported by the lower container 1, and the lower portion of the outer peripheral surface of the container body 2 of the upper container 1 abuts against or is close to the inner peripheral surface of the convex portion 15 of the lower container 1. Furthermore, in the stacked state of the containers 1, the upper container body 2 and the lower mounting portion 17 are configured not to interfere with each other. Note that, in the stacked state of the containers 1, the lower surface (ground surface) of the container body 2 of the upper container 1 may be configured not to abut against the lid base portion 13 of the lid body 5 of the lower container 1.

[0032] 15 and 16, when the lids 5 are stacked (pile up), the convex portion 15 of the lower lid 5 is inserted inside the skirt portion 14 of the upper lid 5, the lower edge of the back side reinforcing rib 16 of the upper lid 5 is supported by abutting against the upper surface of the convex portion 15 of the lower lid 5, and the lower edge of the skirt portion 14 of the upper lid 5 is supported by abutting against the upper surface (upper outermost portion 13a) of the lower lid 5. Furthermore, in this embodiment, when the lids 5 are stacked with the locking pieces 23 inserted into the notches 14a (locked state), a part of the upper piece 21 of the locking member 12 of the lower lid 5 is inserted relatively into the notches 14a of the upper lid 5 and is arranged so as to overlap vertically with the locking member 12 of the upper lid 5.

[0033] When the lid bodies 5 are stacked, the locking members 12 are configured not to come into contact with the lid bodies 11 of the upper and lower lid bodies 5, and when the lid bodies 5 are stacked in a state in which the locking members 12 are displaced to the maximum extent toward the inner periphery of the lid body 11 (locked state), the locking members 12 are configured not to come into contact with the locking members 12 of the upper and lower lid bodies 5. In this embodiment, the lower edge of the back surface reinforcing rib 16 and the lower edge of the skirt portion 14 correspond to the "abutment portion", and the protrusion 15 and the upper surface outermost peripheral portion 13a correspond to the "abutted portion".

[0034] 6, 10, 11, etc., above the mounting portion 17, a protrusion 28 is provided which extends in a direction along the outer circumferential edge of the lid body 11 so as to include at least the range in which the notch 14a is formed, and which is connected to the mounting connection portion 19 of the mounting portion 17. Furthermore, the protrusion 28 in this embodiment is provided so as to connect between the convex portions 15 located on both sides of the mounting portion 17. In other words, the protrusion 28 is formed in a direction along the outer circumferential edge of the lid body 11 over at least the entire range in which the notch 14a is formed, and is provided so as to extend upward from a position including the upper surface of the mounting connection portion 19. More specifically, the protrusion 28 includes an attachment corresponding portion 28a (located above the locking member 12) that is connected to the upper surface of the attachment connecting portion 19 of the attachment portion 17, an end corresponding portion 28b that is located on the inner periphery side of the lid body 11 from the attachment corresponding portion 28a and includes both ends that are connected to each of the protrusions 15, and a protrusion connecting portion 28c that connects between the attachment corresponding portion 28a and each of the end corresponding portions 28b. In this embodiment, in the inner and outer periphery direction of the lid body 11, the attachment corresponding portion 28a and the protrusion connecting portion 28c are located on the inner periphery side of the lid body 11 from the outer side surface of the protrusion 15 and on the outer periphery side of the lid body 11 from the inner side surface of the protrusion 15, and are provided so that the inner side surface of the end corresponding portion 28b is flush with the inner side surface of the protrusion 15. Furthermore, an extension portion 29 that extends horizontally from at least a part of the upper side of the protrusion 28 is provided. In this embodiment, the extension portion 29 is provided so as to extend from the upper side of the end corresponding portion 28b and the protruding connecting portion 28c to the outer periphery side of the lid body 11. The protruding portion 28 and the extension portion 29 are configured so as not to interfere with the locking member 12 of the upper lid body 5 when the lid bodies 5 are stacked (even if the locking member 12 of the upper lid body 5 is positioned as far as possible toward the inner periphery side of the lid body 11, the protruding portion 28 and the extension portion 29 of the lower lid body 5 are configured to be positioned closer to the inner periphery side of the lid body 11 than the locking piece 23 of the locking member 12).

[0035] 11, 12, 14, etc., the upper end of the protruding portion 28 is located lower than the upper end of the convex portion 15. Furthermore, as shown in Figs. 4, 8, 12, etc., the locking member 12 has an operation protrusion 30 that protrudes upward from the upper piece 21. As shown in Figs. 15 and 16, when the lid bodies 5 are stacked, the operation protrusion 30 of the lower lid body 5 is configured to be able to fit within the formation range of the notch portion 14a of the upper lid body 5. In addition, as shown in Fig. 12, etc., the operation protrusion 30 is located on the inner periphery side of the lid body 11 relative to the side wall 22. 8, in this embodiment, even when the locking member 12 is in the locked state, the side wall 22 is located on the outer periphery side of the outer periphery of the lid body 11, and when the locking member 12 is in the locked state, the surface of the operation protrusion 30 on the outer periphery side of the lid body 11 is configured to be at substantially the same position as the end of the mounting connection part 19 (and the convex part 15) on the outer periphery side of the lid body 11 in the inner / outer periphery direction of the lid body 11. However, the part of the upper piece 21 of the locking member 12 that connects to the inner periphery side of the lid body 11 with the operation protrusion 30 is exposed upward through the operation allowance cutout part 19a.

[0036] As described above in detail, according to this embodiment, when the lid bodies 5 with the lock pieces 23 inserted in the cutouts 14a are stacked, a part of the upper piece 21 of the locking member 12 of the lower lid body 5 is inserted relatively into the cutouts 14a of the upper lid body 5 and is arranged to be vertically overlapped with the locking member 12 of the upper lid body 5. Therefore, when the lid bodies 5 with the lock pieces 23 inserted in the cutouts 14a are stacked (stacked) while adopting a configuration in which the locking member 12 is installed on the outer periphery of the upper surface side of the lid main body 11, the height of the stacked lid bodies 5 can be lowered compared to a configuration in which, for example, the locking member 12 (upper surface side) of the lower lid body 5 abuts on the lower edge of the skirt portion 14 of the upper lid body 5. Therefore, it is possible to provide a locking mechanism (without complicating the shape of the container body 2) in accordance with the basic shape of the container body 2 (a configuration including an upper flange portion 9 that protrudes outward from the upper edge of the container body 2 that opens upward), and it is possible to minimize the height of the lid bodies 5 when stacked without making the thickness of the locking member 12 thinner than necessary. As a result, the lid bodies 5 can be efficiently stacked and efficiently transported and stored.

[0037] In addition, when the lid bodies 5 are stacked in a state where the locking member 12 is displaced to the inner periphery of the lid body 11 to the maximum (locked state), the locking member 12 is configured not to come into contact with the upper and lower lid bodies 5 (lid body 11 and locking member 12). Therefore, when the lid bodies 5 are stacked, the locking member 12 of the lower lid body 5 inserted into the cutout portion 14a of the upper lid body 5 is not pressed against the upper lid body 5 (including the locking member 12). Therefore, interference between the locking member 12 of the lower lid body 5 and the upper lid body 5 is avoided, and the effect of lowering the height of the stacked lid bodies 5 is more reliably achieved while avoiding damage and deformation of the locking member 12 and the periphery of the mounting portion 17. Furthermore, if the locking member 12 attached to the mounting portion 17 is configured to be slightly displaceable in the vertical direction relative to the mounting portion 17 (the thickness of the upper piece 21 is smaller than the distance between the mounting connecting portion 19 and the lid base portion 13, forming a slight gap), and if the locking members 12 of the upper and lower lid bodies 5 are not pressed against each other when the lid bodies 5 are stacked (if the locking members 12 are not included in the configuration for supporting the stacking of the lid bodies 5), then even if the locking members 12 of the upper and lower lid bodies 5 are configured to abut against each other, the effect of more reliably lowering the height of the stacked lid bodies 5 while suppressing damage and deformation to the locking members 12 and the surrounding areas of the mounting portion 17 can be achieved.

[0038] In addition, above the mounting portion 17, a protrusion 28 is provided, which extends in a direction along the outer peripheral edge of the lid body 11 so as to include the area where the notch 14a is formed and is connected to the mounting portion 17. In other words, since the notch 14a is provided in the skirt portion 14 corresponding to the area where the mounting portion 17 is formed (and the mounting portion 17 is provided in an area where the protrusion 15 is not provided), there is a concern that the strength and rigidity of the area around the mounting portion 17 may decrease. In this regard, according to the present embodiment, the area around the mounting portion 17 can be reinforced by providing the protrusion 28, which extends at least into the area where the notch 14a is formed and is connected to the mounting portion 17.

[0039] Furthermore, the mounting portion 17 is provided between the convex portions 15, the protrusions 28 are provided so as to connect the convex portions 15, and an extension portion 29 is provided extending horizontally from at least a part of the protrusions 28. This can further increase the strength and rigidity of the protrusions 28 and, in turn, the surrounding area of ​​the mounting portion 17. In addition, when attaching or detaching the lid body 5 to or from the container body 2, stacking the lid bodies 5, or removing the stacked state, the lid body 5 can be moved by hooking a fingertip on the extension portion 29, thereby improving workability, etc.

[0040] In addition, the upper end of the protrusion 28 is located lower than the upper end of the projection 15. For this reason, when the lid bodies 5 are stacked, it is possible to prevent the lower surface of the lid body 5 on the upper tier from contacting the protrusion 28 of the lid body 5 on the lower tier (because the lower surface of the lid body 5 on the upper tier contacts the projections 15 on both sides before contacting the protrusion 28 of the lid body 5 on the lower tier), and it is possible to prevent a load or the like from acting on the mounting portion 17 via the protrusion 28.

[0041] In addition, the locking member 12 is provided with an operation protrusion 30 protruding upward from the upper piece 21, and is configured so that when the lid bodies 5 are stacked, the operation protrusion 30 of the lower lid body 5 can be accommodated within the formation range of the notch portion 14a of the upper lid body 5. In other words, by providing the operation protrusion 30 on the locking member 12, the operability of the locking member 12 can be improved. Furthermore, when the lid bodies 5 are stacked, even if the operation protrusion 30 of the locking member 12 of the lower lid body 5 is relatively positioned below the skirt portion 14 of the upper lid body 5, interference between the operation protrusion 30 (locking member 12) of the lower lid body 5 and the upper lid body 5 can be avoided. Therefore, the height of the stacked lid bodies 5 can be more reliably reduced while avoiding damage and deformation of the locking member 12 and the periphery of the mounting portion 17.

[0042] The operation protrusion 30 is disposed closer to the inner periphery of the lid body 11 than the side wall 22. Therefore, when the lid bodies 5 are stacked, a gap into which an operator's fingertips can be inserted can be formed between the upper piece 21 of the locking member 12 of the lower lid body 5 and the locking piece 23 of the locking member 12 of the upper lid body 5, which is closer to the outer periphery of the lid body 11 than the operation protrusion 30 of the lower lid body 5, and the operator can hook his / her fingertips on the underside of the locking piece 23 of the upper lid body 5. This improves the workability when stacking the lid bodies 5 or when removing the stacked state of the lid bodies 5.

[0043] The present invention is not limited to the above-described embodiment, and may be implemented as follows: Of course, other applications and modifications not exemplified below are also possible.

[0044] (a) In the above embodiment, the arrangement and number of the locking members 12 (mounting portions 17) are not particularly limited, and can be appropriately changed depending on the size and shape of the container (such as the position of the reinforcing ribs 26 of the container body 2). In the above embodiment, the locking member 12 is provided so as to be slidably displaceable in the inward and outward directions relative to the outer circumferential edge of the lid body 11, but it may also be configured to include, for example, an upper piece supported so as to be rotatably displaceable in the vertical direction or with the horizontal direction along the outer circumferential edge of the lid body 11 as the axial direction, a locking piece that is engaged with the underside of the upper flange portion 9 via the notch portion 14a when in the locked state, and a side wall that connects the upper piece and the locking piece.

[0045] (b) In the above embodiment, when the lids 5 are stacked, not only the lower edge of the back side reinforcing rib 16 of the upper lid 5 is supported by contacting the convex portion 15 of the lower lid 5, but also the lower edge of the skirt portion 14 of the upper lid 5 is supported by contacting the upper surface side (upper surface outermost periphery 13a) of the lower lid 5, but it may be configured to support only one of them. Also, for example, it may be configured so that the outer peripheral surface of the skirt portion 14 extends to be flush with the surface of the convex portion 15 on the outer peripheral side of the lid body 11 (the upper surface outermost periphery 13a is omitted, and the skirt portion 14 is inclined so as to spread downward toward the outer peripheral side of the lid body 11).

[0046] (c) In the above embodiment, the skirt portion 14 is configured so that the upper portion remains even at the position corresponding to the mounting portion 17. However, for example, the entire portion of the skirt portion 14 corresponding to the mounting portion 17 may be removed, or a recess may be provided by recessing the portion of the outer peripheral edge of the lid base portion 13 corresponding to the mounting portion 17 toward the inner peripheral side of the lid body 11 by a distance approximately equal to the thickness of the skirt portion 14. When the recess is provided, it is possible to suppress or prevent the locking member 12, which is displaced toward the inner peripheral side of the lid body 11, from protruding outward from the outer peripheral edge of the lid body 11. Incidentally, by leaving the upper portion of the skirt portion 14 even at the position corresponding to the mounting portion 17 as in the above embodiment, it is possible to suppress a decrease in the strength of the skirt portion 14 and the peripheral portion of the mounting portion 17.

[0047] (d) In the above embodiment, the protrusion 28 extends in a bent manner, but may extend in a substantially straight line (further, a reinforcing rib may be provided to connect the protrusion 28, the extension 29, and the mounting connection portion 19 or the lid base portion 13). In the above embodiment, the protrusion 28 may be configured so that, in the inner and outer circumferential direction of the lid body 11, the entire protrusion 28 is located closer to the inner circumferential side of the lid body 11 than the outer surface of the convex portion 15 and closer to the outer circumferential side of the lid body 11 than the inner surface of the convex portion 15, or a part or all of the inner surface of the protrusion 28 in the extension direction may be flush with the inner surface of the convex portion 15, or a part or all of the outer surface of the protrusion 28 in the extension direction may be flush with the outer surface of the convex portion 15.

[0048] Furthermore, in the above embodiment, the protrusions 28 are provided so as to connect the ends of the convex portions 15, but one end or both ends of the protrusions 28 may be configured not to be connected (separated) from the convex portions 15. In that case, for example, the upper side of the portion of the protrusions 28 near the end not connected to the convex portions 15 may be configured to be inclined downward toward the end (the convex portion 15 side).

[0049] (e) In the above embodiment, the container body 2 and the lid body 11 are made of polypropylene, and the locking member 12 is made of polyamide (nylon), but they may be made of other resin materials (polyethylene, PET, polypropylene, polyamide, etc.). Furthermore, in the above embodiment, the container 1 is substantially in the shape of a square box, but it is also possible to embody the container in, for example, a substantially cylindrical shape. [Explanation of symbols]

[0050] 1...container, 2...container body, 4...opening, 5...lid body, 9...upper flange portion, 11...lid body, 12...locking member, 14...skirt portion, 15...convex portion, 17...mounting portion, 21...upper piece, 22...side wall, 23...locking piece, 28...projection portion, 29...extension portion, 30...operating projection portion.

Claims

1. A lid body including a lid body capable of closing an opening of a container and a locking member configured to be changeable between a locked state and an unlocked state, the lid body includes a skirt portion extending downward from an outer circumferential edge of the lid body, and a mounting portion provided at a predetermined position on the outer circumferential edge of the upper surface side of the lid body and capable of mounting the locking member; The skirt portion is provided with a notch portion extending upward from a lower edge portion of the skirt portion at a position corresponding to the mounting portion, the locking member includes an upper piece supported on the mounting portion so as to be slidable or rotatable in an inward / outward direction relative to an outer peripheral edge of the lid body, a locking piece that is engaged with an engaged portion of the container via the notch when in the locked state, and a side wall connecting the upper piece and the locking piece; A lid body characterized in that, when the lid bodies are stacked on top of each other with the locking piece inserted into the cutout portion, at least a portion of the locking member of the lower lid body is inserted relative to the cutout portion of the upper lid body and is positioned vertically overlapping the locking member of the upper lid body.

2. The lid body as described in claim 1, characterized in that a protrusion portion is provided above the mounting portion, extending in a direction along the outer peripheral edge portion of the lid body so as to include at least the area in which the notch portion is formed, and which is connected to the mounting portion.

3. The lid body includes a plurality of protrusions protruding upward from an upper surface side of the lid body along an outer peripheral edge of the lid body, The attachment portion is provided between the protrusions, The protrusions are provided so as to connect the protrusions, The lid according to claim 2, further comprising an extension portion extending horizontally from at least a portion of the protrusion.

4. The lid according to claim 3 , wherein an upper end of the protrusion is located lower than an upper end of the convex portion.

5. The locking member includes an operating protrusion protruding upward from the upper piece, A lid body as described in any one of claims 1 to 4, characterized in that when the lid bodies are stacked on top of each other, the operating protrusion of the lower lid body is configured to fit within the formation range of the cutout portion of the upper lid body.

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