JPWO2017135410A1 - Detachable structure of inner lid and container provided with this - Google Patents

Abstract

[Problem] To further improve the detachable structure of the inner lid related to the creation of the present inventor, and to devise a configuration that can eliminate uncertainties in operation even when considering realistic manufacturing costs And
[Solution] The inner lid detaching structure of the present invention has an outer lid 2 from a container 1 that is secured by a stopper-shaped inner lid 3 and an outer lid 2 that is attached to the inner lid 3 in a covering state. Is a structure for detaching the inner lid 3 in a bayonet engaging manner using the hand tool, and in particular, the inner lid 3 is provided with a dent portion 33 for receiving the detachment operation portion 23 in the outer lid 2, and above this is a dent portion inside. A plurality of engagement protrusions 35 projecting toward the center are formed, and the plug body portion 31 of the inner lid 3 is pushed in from above with the pushing surface 255 of the detaching operation portion 23 engaged with the inner lid 3. The formed or engaging protrusion 35 is characterized in that the upper position of the protruding tip 351 is higher than the upper end height of the plug body 31 in a longitudinal sectional view.

Description

  The present invention relates to an inner lid detaching structure in a container having an inner lid and an outer lid, and a container having the same.

  In order to strictly protect the contents, a container is used which is provided with an inner lid that closes the opening of the container in a plug shape to enhance the sealing property, and an outer lid that is provided in a covering state. In such a container, the inner lid is very tightly fitted into the opening in the form of a plug, and therefore, the operation of removing and fitting the inner lid is extremely difficult to experience. As a result, the contents are likely to be scattered every time the inner lid is removed. In addition, if the contents are liquid, the removed inner lid often has the contents attached to the bottom and must be placed upside down in the upside down position near the work area, and in practice is suitable for placement. Finding a place is troublesome, and the operation of placing it upside down is relatively troublesome because it is performed while taking care not to attach the contents to the hand.

  For this reason, the present inventor has already devised Japanese Patent No. 4134105 “Internal Lid Desorption Structure” and disclosed a solution to the problem. The present invention is provided with an engagement protrusion projecting inwardly on the upper edge of the upper recess portion of the inner lid, and on the other hand, the outer lid is detachable so that it can be fitted into the lower portion of the inner lid. An operating portion is formed, and an engaging groove for obtaining a bayonet engaged state is provided on the peripheral surface of the operating projection. Then, the engagement state between the two is revealed, and the outer lid is operated like a hand tool for detachment so that the outer lid is squeezed out from the opening without directly touching the inner lid.

Although the present invention has solved many of the problems described above, the present inventor has made various developments to further improve the reliability of the operation, and in order to obtain reasonable costs for actual product provision, We are devising a configuration that takes mold costs into consideration. When a shape that achieves reasonable product costs is sought, on the other hand, problems arising from the indispensable clearance for the engagement between the inner lid and the outer lid, as well as new properties arising from the unique properties and specifications of the inner lid I found a problem to be solved.
Specifically, in pursuit of reasonable product costs, the engagement protrusions of the inner lid that engages with the detachable operation portion in a bayonet shape are opposed to each other in the form of a pair of two pieces, mold costs, injection molding costs, etc. However, with this configuration, when the operation of fitting the outer lid attachment / detachment operation portion into the inner lid is random due to the presence of the clearance, the inner lid cannot be removed smoothly or the subsequent fitting is performed. In some cases, the return could not be made smoothly. In addition, the inner lid is made of soft resin, and its shape is different between the capping action state and the detached free state, so it is a solution to more strictly avoid the operational uncertainty caused by this. Was found as

  That is, of course, when the inner lid is tightly plugged into the container opening, the container opening is restricted and an accurate dimensional shape appears, and the outer lid is attached to and detached from the inner lid. Since the portion is dimensioned corresponding to this, the inner lid can be reliably removed except for the uncertain operation caused by the clearance described above. However, on the other hand, the inner lid that has been opened and opened to a free state has a bulging shape compared to the closing operation state, and its rigidity is not sufficient. In other words, the engaged state is a loose state, that is, a state in which rattling is increased. If you try to close the inner lid again in this state, the inner lid core and the outer lid core may not match, so the inner lid cannot be evenly applied to the opening, and the pushing action will not work. There is also a risk that the use of the inner lid may be uncertain, or the outer lid that is pushing the inner lid may fall into a recessed portion of the inner lid. Incidentally, as described above, such a problem becomes apparent when the bayonet-like engagement points are formed at a pair of two points, but may also occur as three or more engagement points. However, it goes without saying that the solution described below functions effectively.

Japanese Patent No. 4134105

  The present invention has been made in view of such a background, and even when the present invention has been further improved on the invention relating to the creation of the present invention and adopts a structure pursuing realistic manufacturing costs. It is an object to devise a configuration that can eliminate uncertainties in operation.

That is, the structure for attaching and detaching the inner lid according to claim 1 is:
Detach and remove the inner lid in a bayonet-engaged manner using the outer lid as a hand tool from a container secured by a stopper-shaped inner lid and an outer lid attached to the inner lid so as to cover the inner lid. In the structure to let
The outer lid has a circular peripheral shape in plan view at the top thereof, and is provided with a detachable operation portion that can be fitted into a recess portion of the inner lid. Further, an outer cover is provided on the outer periphery of the detachable operation portion. A plurality of engaging recesses are formed, including a receiving notch for guiding the fitting into the recess and a catch groove extending continuously in the circumferential direction, and the receiving notch includes an outer lid and an inner lid. A raised portion is provided to stabilize the engagement between the two when engagement with the
On the other hand, the inner lid includes a plug main body part that fits into the opening of the container in a plug shape and closes the inner lid, and a hollow part that is formed inside the upper part of the plug main body and receives the detachment operation part in the outer lid. In addition, on the top of the plug body, a plurality of engagement protrusions are formed that project toward the inside of the recess in plan view.
The pushing surface, which is the lower surface of the catch groove in the detaching operation portion, is formed so as to be able to push the stopper main body portion from above in a state where it is combined with the inner lid.

Moreover, the detaching structure of the inner lid according to claim 2 is:
Detach and remove the inner lid in a bayonet-engaged manner using the outer lid as a hand tool from a container secured by a stopper-shaped inner lid and an outer lid attached to the inner lid so as to cover the inner lid. In the structure to let
The outer lid has a circular peripheral shape in plan view at the top thereof, and is provided with a detachable operation portion that can be fitted into a recess portion of the inner lid. Further, an outer cover is provided on the outer periphery of the detachable operation portion. A plurality of engaging recesses are formed, including a receiving notch for guiding the fitting into the recess and a catch groove extending continuously in the circumferential direction, and the receiving notch includes an outer lid and an inner lid. A raised portion is provided to stabilize the engagement between the two when engagement with the
On the other hand, the inner lid includes a plug main body part that fits into the opening of the container in a plug shape and closes the inner lid, and a hollow part that is formed inside the upper part of the plug main body and receives the detachment operation part in the outer lid. In addition, on the top of the plug body, a plurality of engagement protrusions are formed that project toward the inside of the recess in plan view.
This engagement protrusion is characterized in that the upper position of the protruding tip is higher than the upper end height of the plug body in a longitudinal sectional view.

Furthermore, the demounting structure of the inner lid according to claim 3 is in addition to the requirement according to claim 1 or 2,
The engagement protrusion on the inner lid and the raised portion on the outer lid attachment / detachment operation portion are in a position where both start engagement, from either a loose engagement state to an engagement secured state. Thus, the alignment guiding structure is provided as described above.

Furthermore, the demounting structure of the inner lid according to claim 4 is in addition to the requirement according to any one of claims 1 to 3,
The alignment guiding structure is provided on the engagement protrusion, and the engagement protrusion is guided toward the engagement completion side from the engagement start side to the catch groove of the attaching / detaching operation portion in the outer lid. It has a zone and an engagement securing zone. In the plan view, the projecting width of the engaging projecting piece is set to be smaller than that of the engagement securing zone, and the engagement securing zone is secured. The overhang width is increased toward the zone so as to be continuous with the engagement ensuring zone.

Furthermore, in addition to the requirement of any one of Claims 1 to 4, the demounting structure for the inner lid according to Claim 5 includes:
The engagement protrusions in the inner lid are formed in a pair of two locations facing each other, and the engagement concave grooves formed in the attachment / detachment operation portion in the outer cover are formed in a pair of two locations correspondingly. It consists of

Furthermore, the demounting structure of the inner lid according to claim 6 is in addition to the requirement according to any one of claims 1 to 5,
The receiving notch in the engaging groove formed in the attaching / detaching operation portion of the outer lid is characterized in that a receiving chamfer is formed at the upper edge of the wall surface on the upper inner side toward the lid top surface portion. .

Furthermore, the demounting structure of the inner lid according to claim 7 is in addition to the requirement according to claim 2,
In forming the upper position of the projecting tip of the engagement protrusion of the inner lid higher than the upper end height of the stopper main body, the upper surface of the engagement protrusion or both the upper surface and the lower surface of the engagement protrusion It is characterized by being formed.

Furthermore, the container according to claim 8 is:
An intermediate lid that plugs the opening of the lid fitting portion of the container in a plug shape, and an outer lid that closes the lid fitting portion in an outer covering shape, wherein the inner lid and the outer lid are any one of claims 1 to 7. It is characterized in that it has a structure for attaching and detaching the inner lid described in the item.

The above-described problems can be solved by using the configuration of the invention described in each of the claims.
First, according to the first aspect of the invention, particularly when the inner lid is closed, the outer lid pushes the plug main body portion of the inner lid from above. The inner lid can be securely fitted (pressed).

  According to the second aspect of the present invention, when the protruding tip of the engaging protrusion is pushed downward by the detaching operation portion when the plug is closed, the protruding tip is bent inwardly, In addition, it acts to grab strongly. As a result, a firm and accurate engagement between the two can be achieved, and as a result, a stable capping operation can be performed.

  Furthermore, according to the invention of claim 3 or 4, since the alignment guiding structure is provided, the inner lid inner core can be set to be engaged with the inner core of the outer lid attaching / detaching operation portion, Engagement and plugging operations can be achieved.

  Furthermore, according to the fifth aspect of the present invention, there are a pair of two engaging portions between the outer lid attaching / detaching operation portion and the inner lid engaging protrusion, and this shape is formed by resin molding these members. The mold configuration can be simplified and the shape is excellent in workability at the time of injection molding, and as a result, the product can be provided to the market at a low cost.

  Further, according to the sixth aspect of the present invention, the receiving notch in the engaging groove of the detaching operation portion forms a receiving chamfer, and the protruding tip of the engaging protruding piece rises upward from the upper surface. This eliminates the difficulty of engaging with the detaching operation portion due to the formation in the shape.

  Furthermore, according to the seventh aspect of the present invention, if at least the upper surface of the engagement protrusion is formed so as to rise upward, the cross-sectional shape of the tip can be made sharp, and the end of the protruding tip can be made sharp. The attachment / detachment operation part is gripped by the tip part, and the engagement state between the two becomes more reliable. In addition, when the lower surface of the engagement protrusion is also inclined upward, the mold can be easily removed when the inner lid is manufactured by resin molding, and the productivity can be improved and the mold structure can be simplified.

  Furthermore, according to the invention described in claim 8, a container having the above effects can be obtained.

The exploded perspective view (a) which shows an example of the container provided with the desorption structure of the inner lid which is the present invention, the perspective view (b) of the whole container shown with the outer lid attached to the container, the outer lid and the middle The exploded perspective view (c) which shows the mode of engagement of a lid | cover, the partial enlarged plan view (d) of the inner lid in the arrow d direction of this figure (c), and the ee line | wire of figure (c) It is a partial expanded sectional view (e) which shows two types of shapes of the inner lid cut | disconnected by (2), and explanatory drawing (f) which shows a mode that an inner lid is removed from a container using an outer lid like a hand tool. An enlarged perspective view (a) showing the outer lid in a normal attachment state (posture), a plan cross-sectional view (b) partially showing an engagement guide portion of the detachment operation portion in the outer lid, and a pushing surface of the outer lid It is the partial longitudinal cross-sectional view (c) which shows two types of shapes, and the plane cross-sectional view (d) which shows the engagement ditch | groove part of an outer cover over a perimeter. They are a perspective view (a) which shows an inner lid in a normal attachment state (posture), a longitudinal sectional view (b) showing two kinds of cross-sectional shapes of the inner lid, and a plan view (c) of the inner lid. A vertical sectional view (a) of the outer lid shown in an upside down state (posture) to engage the outer lid with the inner lid, a vertical sectional view (b) showing the inner lid in a free state, and a container It is a longitudinal cross-sectional view (c) which shows the plugged state which attached the lid | cover and the outer lid, and each shows 2 types. It is a partial longitudinal cross-sectional view which shows three types of shapes of the engagement protrusion of an inner lid. It is a top view which shows various plane shapes of the alignment guidance structure in the engagement protrusion of an inner lid, and a plane sectional view which shows various alignment alignment structures in an outer lid. It is explanatory drawing which shows sequentially the removal | desorption operation | work of an inner cover, and the operation state of each part in that case. It is explanatory drawing same as the above, and is explanatory drawing (v) which shows the state which engaged the bayonet to the inner lid with the outer lid in planar view, and explanatory drawing (vi) which shows a mode that the inner lid is removed from a container. It is the perspective view (a) which shows a mode that the liquid content adhering to the stopper bottom part of the inner lid was wiped off by the edge (opening part) of the container, and a longitudinal cross-sectional view (b). It is explanatory drawing which shows the state which put the inner cover removed from the container on the work table etc. with the outer cover. It is explanatory drawing which shows the mode of the liquid content which hangs down from an inner cover to an outer cover in steps. It is explanatory drawing (viii) which shows a mode at the time of fitting the inner cover in an engagement state with an outer cover in a container. When the projection of the outer lid comes into contact with the engagement protrusion of the inner lid, the inner lid expands to the outer peripheral side, and even in this situation, the plug main body push type must be pushed in securely. It is explanatory drawing which shows a mode that can be performed. It is explanatory drawing (a) which shows the problem when not providing the alignment induction | guidance | derivation structure in an inner cover and an outer lid, and explanatory drawing (b) which shows the alignment effect | action when having an alignment induction | guidance | derivation structure. It is an expanded sectional view which shows two types each in an engagement state and a isolation | separation state, respectively. It is explanatory drawing which shows the problem in case the liquid content adhering to the stopper bottom part of an inner lid falls down, when the inner lid removed from the container is put on a work table etc. in the state upside down with the outer lid. . It is explanatory drawing which shows a stopper main-body part pushing and a protruding piece pushing type outer lid and an inner lid.

  The best mode of the inner lid attaching / detaching structure of the present invention and the container provided therewith is as follows. However, it is possible to appropriately modify this form within the scope of the technical idea of the present invention. is there.

  In the figure, reference numeral 1 denotes a container, and this container includes an outer lid 2 and an inner lid 3, and a strictly sealed state is obtained by these. That is, the inner lid 3 is fitted in a plug shape to close the opening 13 of the container 1, and the outer lid 2 is fixed to be screwed into the container 1, for example, so as to cover the inner lid 3.

  Each member will be described below. The container 1 is provided with a lid fitting portion 12 as an example with respect to the container main body 11 that substantially stores the contents. The lid fitting portion 12 substantially forms the opening 13, is formed in a relatively short cylindrical shape, and the inside becomes the opening 13 communicating with the container main body 11. A male screw portion 14 is formed on the outer peripheral portion of the lid fitting portion 12 so that the outer lid 2 is screwed and fastened as an example.

Next, the outer lid 2 will be described. As shown in FIGS. 1 and 2, the outer lid 2 has a cover-like member shape that houses the inner lid 3 with respect to the lid fitting portion 12 and is fastened and attached as an example. First, with respect to the lid top surface portion 22 of the lid main body portion 21 constituting the outer lid 2, a desorption operation portion 23 is provided above the lid top surface portion 22. In the present specification, the vertical direction refers to the vertical direction in a state in which the outer lid 2 and the inner lid 3 are attached to the container 1 and are closed. Incidentally, the vertical direction is defined in this way when the outer lid 2 is used as a hand tool and the inner lid 3 is detached as described later, and the outer lid 2 is opposite to that during normal use as a lid. This is because it is used upside down, to clarify the explanation. Furthermore, an internal thread portion 24 is provided inside the lid main body portion 21, and the internal thread portion 24 is screwed together with the external thread portion 14 in the container 1 to fix the outer lid 2.
The inner surface of the portion constituting the lid top surface portion 22 is used as a pressing surface portion 22a, and a relief portion 22b of the engaging projection piece 35 of the inner lid 3 having an upward projecting shape described later is formed at the center side thereof. To do.

Here, at the time of closing, for example, as shown in FIG. 4C, in order to press the inner lid 3 fitted to the container 1 on the inner side surface of the lid top surface portion 22, this portion is set as a pressing surface portion 22 a.
Further, when the inner lid 3 is fitted into the container 1, the outer lid 2 is used like a hand tool as described above. At this time, the plug body formed in a standing wall shape on the side peripheral surface of the inner lid 3 There are a method of fitting the inner lid 3 while pushing the part 31 over substantially the entire circumference, and a method of fitting the inner lid 3 while pushing the engaging protrusion 35 formed to project inwardly at the upper part of the inner lid 3. In the present specification, the former is referred to as a stopper main body pushing type, and the latter is referred to as a protruding piece pushing type. Details of the inner lid 3, particularly the plug main body 31 and the engagement protrusion 35 will be described later. In particular, in the case of the projecting piece push type, the upper end of the engaging projecting piece 35 is formed in an upwardly projecting shape. Therefore, in order to avoid interference with the upper end 2, An escape portion 22b is formed on the pressing surface portion 22a.

  Next, the attachment / detachment operation portion 23 of the outer lid 2 will be described. This is integrally formed on the upper surface of the lid top surface portion 22 of the outer lid 2, has a circular peripheral shape in plan view, and can be fitted into a recessed portion 33 of the inner lid 3 described later. Has a shape. A plurality of engagement grooves 25 are formed on the outer periphery of the attachment / detachment operation portion 23, and two places are formed as an example in this embodiment. When viewed as a whole, for example, as shown in FIG. 1 (a), the engagement groove 25 has a lateral L-shape when viewed from the side, and is fitted into the recess 33 of the inner lid 3. A receiving cutout 251 to be guided and a catch groove 252 extending in the circumferential direction connected to the receiving cutout 251 are provided. In addition, it is preferable that the receiving notch 251 forms the receiving chamfer 251a toward the lid | cover top surface part 22 in the upper edge part of the concave wall surface 231 in the upper inner side. As a result, the engagement operation between the attachment / detachment operation portion 23 and the inner lid 3 can be performed smoothly.

Further, a concave wall surface 231 near the back of the catch groove 252 extending in the circumferential direction is provided with a raised portion 253 that stabilizes the engagement between the outer lid 2 and the inner lid 3 when the outer lid 2 and the inner lid 3 are engaged. . Such a catch groove 252 is substantially in a state in which the side peripheral surface of the attachment / detachment operation portion 23 in the outer lid 2 is scraped, and as a result, the catch groove 252 is pulled upward above the relative section of the catch groove 252. The upper rib 254 will be formed. The pulling rib 254 has a pulling upper surface 254a on its lower surface side, and an open end on the receiving notch 251 side of the pulling rib 254 is partially chamfered to form an engagement guiding surface 254b. A lower portion facing the pulling upper surface 254a is a pushing surface 255, and is formed somewhat above the upper surface of the lid top surface portion 22 of the outer lid 2.
Incidentally, in the case of the plug body portion pushing type, the pushing surface 255 is larger than the pulling surface 254a because the inner lid 3 is fitted into the container 1 by pushing in the plug body portion 31 of the inner lid 3 as described above. It is formed to a radial dimension.

Hereinafter, the shape structure of the part related to the engagement groove 25 in the attachment / detachment operation unit 23 will be described in more detail. First, as shown in an enlarged view in FIG. 9, the peripheral surface on the open side of the engaging groove 25 is defined as an outer wall surface 232 corresponding to the recessed wall surface 231 that is the inner wall surface of the engaging groove 25. The outer wall surface 232 sandwiches the engaging groove 25 in the vertical direction, and the upper portion (downward in FIG. 9) is the engaging outer wall surface 232a, while the lower portion constitutes the pushing outer wall surface 232b. As described above, there are two types of this part, the plug body part pushing type and the projecting piece pushing type, as shown in FIGS. 9 (a) -1 and 9 (b) -1 are the plug body part pushing type. And what is shown to FIG. 9 (a) -2 and (b) -2 is a protrusion piece type, and the radial direction position of the pushing outer wall surface 232b in the attachment / detachment operation part 23 differs in each type. In other words, in the plug body portion pushing type, the pushing outer wall surface 232b is located outside the outer diameter (outermost diameter including wall thickness) position of the plug body portion 31, and in the projecting piece pushing type, the pushing outer wall surface 232b is It is set to substantially the same position as the inner diameter position of the plug body 31, that is, approximately the same position as the engaging outer wall surface 232 a.
A corner portion between the outer pressing wall surface 232b and the pressing surface 255 is a pressing outer edge 256, and a space between the pressing outer edge 256 and the concave wall surface 231 of the engaging groove 25 is a groove width 25W. In addition, the positional relationship of each of the above-mentioned portions around the engaging groove 25 is determined by a relative relationship with the shape structure of the inner lid 3 described below. After the description, it will be described as a state where both are combined.

  Next, the inner lid 3 will be described. As shown in FIGS. 1 and 3, the inner lid 3 closes the opening 13 of the container 1 in a plug shape by a plug main body 31 and a plug bottom 32, and the plug main body 31 is located on the upper inner side reaching the plug bottom 32. A recess 33 is provided. The detachment operation part 23 of the outer lid 2 is assembled in the recessed portion 33 in an internally fitted state, and the inner lid 3 is detached by the action described later. The stopper main body 31 includes a flange 34 that is outward in cross section in the circumferential portion thereof, and a plurality of engagement protrusions 35 that project toward the inner side of the recess 33, such as two to four pieces. It is formed.

The engagement protrusion 35 will be described in more detail. In the present embodiment, two engagement protrusions 35 are provided facing each other as an example in plan view. However, the peripheral shape of the engagement groove 25 in the attachment / detachment operation portion 23 is different from that of the plug body portion pushing type. In connection with the two types of one-push type, there are two types when roughly classified.
First, as shown in FIG. 1 (e)-1, the engagement protrusion 35 is formed in a flush state with the flange portion 34, and the inner protrusion is in a direction perpendicular to the cross-sectional direction of the plug body portion 31. It corresponds to the stopper main body pushing type outer lid 2 (the outer lid 2 having no escape portion 22b).

On the other hand, what is shown in FIG. 1 (e) -2 corresponds to the projecting piece pushing type outer lid 2, and the tip end side of the extension tip portion 351 is directed upward, and as a result The upper position of the leading end portion 351 is formed to be higher than the upper end height of the plug main body portion 31.
Incidentally, the suffix “−1” attached to each drawing indicates the plug body portion pressing type, and “−2” indicates the protruding piece pressing type.

The overhanging tip 351 of the engagement protrusion 35 only needs to be formed so that at least the upper position on the upper end surface is higher than the upper end height of the plug main body 31, and various shapes are taken. To get. Specifically, first, as shown in FIG. 5 (a), only the upper surface of the engagement protrusion 35 is inclined upward from the upper edge of the plug body 31, and the lower surface is in a horizontal state, that is, orthogonal to the height direction. Such a shape can be taken. In the embodiment shown in FIG. 5B, the upper and lower surfaces of the engaging protrusion 35 are both formed in an upward parallel state. Further, in the embodiment shown in FIG. 5C, a semicircular projecting portion 351 a is formed on the upper surface of the engagement protrusion 35.
Incidentally, the upward angle α of the overhanging tip 351 is preferably about 15 ° in consideration of the extraction after the molding of the molding die as shown in FIG. An angle range exceeding this range can be selected.
Further, regarding the plug main body portion 31, the range of the thick portion is set as a main body thickness range 31 t, and the range of the flange portion 34 that protrudes outside is set as a flange extended range 34 d.

  Further, as shown in FIGS. 1, 3, and 6, the engagement projecting piece 35 has a shape that does not have the same overhang width W in the entire range in plan view, thereby configuring the alignment guiding structure 5. That is, the overhanging width W of the engaging protrusion 35 is set to be smaller than the overhanging width W in the engagement securing zone 353 in the alignment guiding zone 352, and further smoothly toward the engagement securing zone 353 from there. It is preferable to take a shape that increases the overhang width W. Although various specific shapes can be employed as shown in FIG. 6, as an example, it is preferable to approximate the shape of the recess R to the cross-sectional shape of the raised portion 253 of the outer lid 2 as shown in FIG.

Here, a mode in which the outer lid 2 and the inner lid 3 are combined will be described. First, in the plug body portion pushing type, as shown in FIGS. 9 (a)-1 and (b)-1, the pushing outer edge 256 in the attaching / detaching operation portion 23 of the outer lid 2 is the outer peripheral side of the stopper body portion 31 in the inner lid 3. That is, it is located between the flange overhang ranges 34d. In this state, an outer ring-shaped space is formed in a vertical sectional view by the upper surface of the flange portion 34 of the inner lid 3, the pushing outer wall surface 232 b of the attaching / detaching operation portion 23 in the outer lid 2, and the lid top surface portion 22. Note that this space is formed by the outer lid 2 and the inner lid 3 when the contents are liquid (referred to as the liquid content L) and the liquid contents L adhering to the plug bottom 32 of the inner lid 3 flow down. This space is referred to as an entry prevention space 220 in order to prevent the minute gaps and thus entering into the engagement grooves 25. The depth dimension of the intrusion prevention space 220 (the distance from the pushed outer wall surface 232b to the outer peripheral end of the flange portion 34) is a space width 220W, and the space width 220W is the thickness of the inner lid 3 (flange portion 34). It is preferably at least twice the thickness dimension, more preferably at least 3 times.
Further, the separation distance between the upper surface of the flange portion 34 of the inner lid 3 and the lid top surface portion 22 of the outer lid 2 in the intrusion prevention space 220 is defined as a space height 220L, and this space height 220L is the inner lid 3 (flange portion 34). It is preferable that it is more than the thickness dimension of this, More preferably, it is 2 times or more.

In such a configuration, when the inner lid 3 is pushed into the opening 13 of the container 1, the pushing surface 255 pushes the main body thickness range 31 t of the inner lid 3 over almost the entire circumference, which is reliable. Pushed in.
Note that the pushing surface 255 does not necessarily have to be formed as a continuous surface of 360 degrees. For example, as shown in FIG. In this case, since the pushing of the plug body 31 by the pushing surface 255 does not strictly take the entire circumference, it is described as “substantially the entire circumference (pressing over)” in the above description.

  On the other hand, after opening the lid, when the outer lid 2 and the inner lid 3 are combined and placed in the reverse posture, that is, when the outer lid 2 is placed on the nearest work table or the like, For example, it is conceivable that the liquid content L is attached to the plug bottom 32 of the inner lid 3 (see FIG. 7-4). At this time, the adhering liquid content L may hang down from the outer peripheral end of the plug bottom 32 to the outer lid 2 positioned below along the plug main body 31. However, even if such a phenomenon occurs, since the intrusion prevention space 220 exists, the liquid content L may enter the minute gap between the outer lid 2 and the inner lid 3 and thus the engaging groove 25. Is prevented.

  Incidentally, when the entry prevention space 220 is not formed, as shown in FIG. 10, as an example, the pressing surface 255 and the flange portion 34 are in a state of close contact with each other, and a minute gap is formed between the surfaces. The For this reason, when the liquid content L adhering to the inner lid 3 hangs down from the periphery, the liquid content L enters the micro gap due to a capillary phenomenon or the like caused by the micro gap, and finally Can reach the back of the engaging groove 25. When the liquid content L reaches the back of the engagement groove 25, the back of the engagement groove 25 has a corner shape even if it is removed with a waste cloth or a pointed device. Therefore, it is extremely difficult to cleanly remove the liquid content L that has reached the back. Furthermore, when the liquid content L that has entered the depth of the engagement groove 25 is dried and solidified, the solidified product forms irregularities in the groove, and the engagement groove 25 having a desorption function is formed. After the fact, it may not be possible to perform its function sufficiently.

Of course, even when the intrusion prevention space 220 is formed as described above, the liquid content L may sag itself. However, for example, as shown in FIG. 7-4, the liquid content L that hangs down from the inner lid 3 hangs down on the lid top surface portion 22 and shoulders of the outer lid 2 and further falls on the work table from here. In other words, the minute gap formed by the outer lid 2 and the inner lid 3, and thus the engagement groove 25, does not enter. Incidentally, since the lid top surface portion 22 and the shoulder portion of the outer lid 2 are protruding corners or flat surfaces, they can be easily wiped off with a waste cloth or the like if they are in an undried state. In addition, since such a portion is not at least a concave portion having a desorption function, even when the liquid content L is dried and solidified, it can be easily scraped off using a scraper, leather skin or spatula.
The technical idea itself that prevents the liquid content L that hangs down from the inner lid 3 from entering the minute gap between the outer lid 2 and the inner lid 3 was previously created by the present applicant (Japanese Patent No. 4134105). However, it has already been considered and achieved, and in the stopper main body part pressing type of the present invention, when the inner lid 3 is fitted into the container 1, the stopper main body part 31 is uniformly pressed over the entire circumference, and The above technical idea (the idea of preventing the liquid content L from entering the minute gap between the outer lid 2 and the inner lid 3) is achieved at the same time.

Next, the protruding piece push type will be described.
In the projecting piece pushing type, the entry preventing space 220 as described above is easily provided. That is, in the protruding piece push type, for example, as shown in FIGS. 9 (a) -2 and (b) -2, the pushing outer wall surface 232b and the engaging outer wall surface 232a of the attaching / detaching operation portion 23 in the outer lid 2 are substantially the same. Since it becomes the same surface, it becomes a structure where the approach prevention space 220 is easier to ensure.
However, in this projecting piece pushing type, when the inner lid 3 is fitted into the container 1, the pressing force through the outer lid 2 acts only on the engaging projecting piece 35 (see FIG. 9B-2). For this reason, as shown in the figure, the protruding tip portion 351 of the engaging protrusion 35 is set to be directed upward to ensure the pushing at this portion. This action will be described later in detail.

The present invention has a specific shape as described above, and performs the following operations to reliably and smoothly detach and attach the inner lid 3.
(I) State of inner lid First, the closing state of the inner lid 3 will be described. As described in the background of the previous invention, the inner lid 3 is made of a soft resin having a certain degree of flexibility (for example, made of polyethylene) in order to ensure a closed state. Since it is forcibly press-fitted into 13, it takes a certain shape, but in a free state, it is in a state of bulging somewhat. Specifically, as shown in FIGS. 4B and 4C, in the closed state, the plug body 31 of the inner lid 3 has a diameter of the opening 13 which is the inner diameter of the lid fitting portion 12 of the container 1. It is press-fitted in a state of being pressed and shrunk together. Incidentally, in this state, the inner lid 3 itself is originally in a free state and flexible, but apparently has a high rigidity. On the other hand, in the free state, i.e., when it is pulled out, there is no restriction of press-fitting into the opening 13 in the container 1 as shown in a slightly exaggerated manner in FIG. Presents a state. In the protruding piece push type, the engaging protruding piece 35 in the inner lid 3 is not pushed in due to the presence of the escape portion 22 b in the outer lid 2.

(II) Opening Operation First, in the description of the opening operation, the state in which the inner lid 3 and the outer lid 2 are in the state in which the opening 13 of the container 1 is closed is set as the starting state.
(A) Removing the outer lid (Fig. 7-1 (i) (ii))
In such a state, according to a conventional method, the outer lid 2 is first twisted counterclockwise to release the twisted state. After doing in this way, it turns upside down so that the attachment / detachment operation part 23 side of the outer lid 2 may face downward.

(B) Engagement with the inner lid (FIG. 7-1 (iii))
In such a state, the detachment operation part 23 of the outer lid 2 is directed to the dent part 33 of the inner lid 3 so that the detachment operation part 23 is inserted into the dent part 33. In this operation, the portion of the receiving groove 251 in the engaging groove 25 is matched with the position of the engaging protrusion 35 in the inner lid 3 so that the engaging protrusion 35 and the engaging groove 25 are fitted. The outer lid 2 and the inner lid 3 are brought close to each other. Actually, the inner lid 3 is in a state of being attached to the container 1, and an operation is performed in which the outer lid 2 is pushed into the inner lid 3. At this time, when the receiving chamfer 251a is formed in the portion of the receiving notch 251, the engagement is smoothly started. In addition, a chamfered engagement guide surface 254b is formed on the side of the receiving notch 251 of the pull-up rib 254 constituting the engaging groove 25, and the engaging operation with the engaging protrusion 35 is performed. This also makes it smoother. Incidentally, in this operation, the outer lid center core O2 and the inner lid center core O3 do not necessarily match, but even so, as will be described later, the center cores O2 and O3 are finally formed by the action of the alignment guide structure 5 as will be described later. Engagement is achieved in a matched state.

(C) Bayonet engagement (FIGS. 7-1 (iv) and 7-2 (v))
In this way, while avoiding interference with the engaging protrusion 35 by the receiving cutout 251 of the engaging groove 25, the attaching / detaching operation portion 23 of the outer lid 2 fitted into the recessed portion 33 of the inner lid 3 is used as it is. When the outer lid 2 is rotated in a clockwise direction in the figure, the catch groove 252 in the engagement groove 25 is engaged in a bayonet engagement so as to accommodate the engagement protrusion 35 of the inner lid 3. At this time, when the alignment guiding zone 352 as the alignment guiding structure 5 and the engagement ensuring zone 353 are formed in the engagement protrusion 35 of the inner lid 3, the raised portion at the back of the catch groove 252 253 first comes into contact with the alignment guide zone 352, so that the inner cover intermediate core O3 and the outer cover intermediate core O2 are in contact with the engaging protrusions 35 and the raised portions 253 that are provided oppositely. The ridges 253 sequentially come into contact with the engaging protrusions 35 while being guided in a state of matching. Incidentally, at this time, in the case of the projecting piece pushing type engagement, when the engagement state of the inner lid 3 and the outer lid 2 is viewed in the longitudinal side surface state, as shown in FIGS. 9A-2 and B-2. In addition, the projecting tip 351 of the engaging protrusion 35 protrudes upward from the upper edge of the plug main body 31. As a result, the engaging protrusion 35 is stretched by the pushing surface 255 of the outer lid 2 turned upside down. The leading end 351 is pushed downward. As a result, the protruding tip 351 takes a posture toward the center of the inner lid 3, and the protruding tip 351 surrounds the concave wall surface 231 that is the inner wall of the catch groove 252 of the outer lid 2. In this state, the mutual engagement relationship between the inner lid 3 and the outer lid 2 is accurately maintained. Of course, this action functions more effectively at the time of wiping work described later (at the time of removing the liquid content L adhering to the inner lid 3 immediately after opening) and at the time of closing the work.

  Here, the reason for forming the alignment guiding structure 5 and other forms will be described. As a background of the reason for formation, an inconvenience when the alignment guiding structure 5 is not provided will be described based on FIG. First, between the outer diameter dimension of the detaching operation portion 23 of the outer lid 2 and the inner diameter dimension of the recessed portion 33 of the inner lid 3 and the engaging protrusion 35 that engage with the outer lid 2 inevitably both easily A dimensional difference that can be engaged, that is, a gap must be taken. When such a gap is secured, as shown exaggeratedly in FIG. 8A, due to this gap, the first fitting is performed in a state where the outer lid core O2 does not match the inner lid core O3. Tend to. In this state, when the outer lid 2 is rotated to the right in the figure so as to engage with the bayonet, the raised portion 253 on the side on which the center is biased becomes the raised base end portion 253p at the end of the engaging protrusion 35 first. Contact. On the other hand, when the raised portion 253 on the opposite side is viewed, the center of the outer lid 2 is offset, and on this side, the raised intermediate portion 253g is in contact with the end of the engaging protrusion 35. Looking at the mutual relationship between the raised portion 253 and the engaging projection piece 35, the contact angle θ1 between the tangent line of the raised portion 253 on the side where the central core is offset and the distal end tangent line of the engaging projection piece 35 is Is larger than the contact angle θ2 on the opposite side. This means that if the outer lid 2 is rotated while the outer lid center core O2 and the inner lid center core O3 are displaced as described above, the outer lid 2 rotates as if due to the raised portion 253 on the offset side. While it tends to be blocked, the contact angle θ2 is shallow (the angle is small) on the opposite side, and a state where the raised portion 253 meshes with the engagement protrusion 35 more easily appears. Of course, if the outer lid 2 is rotated more strictly, the engagement between the outer lid 2 and the inner lid 3 can be ensured. However, if an inadvertent operation is performed, in the next stage, the raised proximal end portion on the offset side The outer lid 2 pivots about 253p. At this position, the outer wall surface 232 of the attachment / detachment operation portion 23 is brought into contact with the inner wall surface 33W of the recess portion 33 of the inner lid 3 as indicated by a symbol P (contact point) in the drawing. It comes into contact, and further turning is prevented. This state is transmitted as if it were transmitted to the operator's hand as if the center of the outer lid 2 and the inner lid 3 were exactly aligned and the engagement was complete. Naturally, in this state, the catch groove 252 is not sufficiently engaged with the engagement protrusion 35, and the extraction of the inner lid 3 described below tends to be uncertain.

From this background, as described above, the alignment protrusion zone 35 is provided with the alignment guiding zone 352 which is the alignment guiding structure 5, and as shown in FIGS. 7-1 (iv) and 8 (b). Thus, the initial engagement between the raised portion 253 and the engagement protrusion 35 becomes smooth. As a result, even if the inner lid core O3 and the outer lid center core O2 are not matched with each other and they are engaged with each other, smooth engagement is advanced, so that the center core naturally matches. The lid 2 is guided to complete the engagement. Incidentally, as shown in FIG. 6A, if the concave portion R shape is approximated to the cross-sectional shape of the raised portion 253 with respect to the shape of the alignment guide zone 352, the outer lid inner core O2 is matched with the inner lid inner core O3. In this way, the engagement in the center alignment state can be performed more securely.
Note that the alignment guide structure 5 for this purpose may be formed between the raised portion 253 and the engagement protrusion 35. For example, as shown in FIGS. 6 (d) and 6 (e), the raised portion 253 The gentle alignment guide surface 253A may be formed, or the alignment guide raised portion 253B having a small raised height dimension may be formed in the front stage portion.

(D) Start of lifting (Fig. 7-2 (vi))
When pulling up, that is, when removing the inner lid 3, the outer lid 2 is dimensioned so that the lid main body 21 can be easily grasped by hand and force can be applied. Therefore, the inner lid 3 engaged with this is used as a clue. It pulls up while making it the state which removes from the opening part 13. At this time, the actual pulling is such that the pulling upper surface 254a of the pulling rib 254 substantially forming one surface of the catch groove 252 is pulled up while hitting the lower surface of the engaging protrusion 35.
When the inner lid 3 is removed from the opening 13 of the container 1, the inner lid 3 is in a free state as if it has expanded (see FIG. 4 (b)), and the outer lid 2 is further loosened. It becomes. However, a raised portion 253 is provided in the catch groove 252, and this loosely contacts the engagement protrusion 35 of the inner lid 3 so as to expand inwardly. Therefore, the engagement between the outer lid 2 and the inner lid 3 is unstable. Does not occur.

(III) Wipe removal work (removal work of liquid contents adhering to the inner lid) (Figure 7-3)
As described above, the liquid content L may adhere to the bottom surface (plug bottom portion 32) of the inner lid 3 removed from the container 1, and the wiping operation involves removing the liquid content L from the container 1. It is the work of wiping with the edge.
For example, as shown in FIG. 7-3, this operation is performed by operating the outer lid 2 that is engaged with the inner lid 3 without rattling, and the user does not touch the inner lid 3 directly. Yes. Specifically, as shown by an imaginary line in FIG. 7-3 (b), first, the inner lid 3 is placed in an oblique posture above the opening 13, and the liquid content L is gathered at the lower end edge of the stopper bottom 32. As much as possible, extra liquid content L is dropped into the container 1. Next, the outer lid 2 is moved so that the inner lid 3 (plug bottom portion 32) is squeezed by the edge (opening portion 13) of the container 1, and the liquid content L that has not been dropped by the above operation is wiped off by the edge of the container 1. By doing in this way, the user can return the liquid content L adhering to the stopper bottom 32 cleanly into the container 1 without directly touching the inner lid 3 at all. Of course, in the wiping operation, the user does not touch the inner lid 3 at all, that is, the direct operation only by the operation of the outer lid 2 can be performed reliably by the raised portion 253 of the outer lid 2. The ability to catch greatly contributes.

  Incidentally, in actual use of the liquid content L such as paint contained in the container 1, it is desirable to mix the contents well immediately before the liquid content L such as paint is actually used to make the components uniform. For this reason, even in a conventional container (a container in which the detachment operation unit 23 does not exist in the outer lid 2), it is preferable to gently open the inner lid 3 and then slowly agitate the liquid content L in the container with a long rod-shaped member. (Recommended for usage) However, the method of separately using a rod-shaped member to make the components of the liquid content L uniform is extremely troublesome and takes a relatively long time to sufficiently stir. For this reason, there are actually some people who shake the liquid contents L vigorously by shaking the container before removing the inner lid 3. However, the method of stirring the liquid content L by shaking the container 1 in this way can obtain a sufficient stirring effect in a relatively short time, but a large amount of the liquid content L is added to the plug bottom 32 of the inner lid 3 by stirring. In the past, when the liquid content L is removed, for example, when the inner lid 3 is removed, the liquid content L adheres more to the user's fingertips or when the inner lid 3 is turned upside down and placed on the work table. The liquid content L was a factor that drooped.

In this respect, in the present invention, since the inner lid 3 can be caught by the outer lid 2 without rattling, even if the container 1 is shaken to stir the liquid content L, that is, a large amount of the liquid content L adheres to the inner lid 3. Even when the inner lid 3 is removed, the user does not touch the inner lid 3 directly, and the liquid content L attached to the inner lid 3 can be wiped off reliably.
Depending on the properties of the liquid content L, etc., it may be undesirable to shake the container 1 in a closed state to make the components uniform (stirring), but without shaking the container 1 (quietly). Even when the inner lid 3 is removed, the liquid content L may adhere to the inner lid 3 as described above, and it is basically assumed that the wiping work as described above is performed after the opening. preferable. Of course, when the liquid content L is hardly attached to the inner lid 3 by visual inspection of the user when the plug is opened, the above-described wiping operation need not be performed and may be omitted as a matter of course.

(IV) Inner lid placement (Figure 7-4 (vii))
Thereafter, the inner lid 3 is placed on a nearby table or the like. At this time, the inner lid 3 is held so that the bottom surface (lower surface) of the inner lid 3 is captured by the attaching / detaching operation portion 23 of the outer lid 2 so as to face upward. Leave as it is. Naturally, the outer lid 2 is in a state in which the upper side faces upward.

  Next, a description will be given of an intrusion prevention structure that prevents the contents from entering the minute gap between the outer lid 2 and the inner lid 3 and thus the engagement groove 25 in such a state where the inner lid is stationary. As described above, for example, the liquid content L stored in the container 1 may adhere to the plug bottom 32 of the inner lid 3 at the time of opening. If it is placed in such a state inadvertently so that the plug bottom 32 of the inner lid 3 faces upward, the liquid content L flows downward along the plug body 31 as shown in FIG. However, as shown in FIG. 9, since the entry prevention space 220 is secured between the lid top surface portion 22 of the outer lid 2 and the flange portion 34 of the inner lid 3 that are engaged with each other, the liquid content L Even if the liquid flows down, the liquid content L that has flowed down hangs down on the lid top surface portion 22 and the shoulder portion of the outer lid 2, and can prevent the entry into the gap and the engagement groove 25. That is, due to the presence of the intrusion prevention space 220, the separation distance (space height 220L) between the lid top surface portion 22 and the flange portion 34 and the distance between the outer wall surface 232b and the end of the flange portion 34 (space width 220W) are increased. The liquid content L is prevented from entering into the gap due to capillarity or the like which acts when the outer lid 2 and the inner lid 3 are provided in a face-to-face state.

Next, the behavior of the liquid contents (indicated by the symbol Ld) that hangs down from the flange portion 34 of the inner lid 3 to the lower outer lid 2 will be described.
As an example, the liquid content Ld enters the surface facing downward (upper surface in the plugging position) of the flange portion 34 that is inverted, and slightly inward, as shown in FIGS. 7-5 (a) and (b). At this position, it grows as a “drop” having a shape expressed as an inverted Mt. Fuji shape, and finally drips down onto the lid top surface 22 as shown in FIGS. 7-5 (c) to (f). Naturally, the growth of “drop” below the flange portion 34 is a phenomenon that occurs both in the drooping direction and in the horizontal direction along the flange portion 34, and the liquid content Ld as the growing “drop” is allowed. The growth limit varies depending on properties such as the viscosity, surface tension, or mass (specific gravity), but the end of the liquid content Ld (the boundary with the flange portion 34) penetrates the intrusion prevention space 220 and contacts. It must be in a range that does not reach (it is a minute space region formed by the inner lid 3 and the pushing surface 255, and is denoted by reference numeral 221), and it is necessary to prevent capillary action from occurring at the contact portion 221.
For this reason, the space height 220L of the ingress prevention space 220 is such that the lower end of the “drop” -like liquid content Ld that has grown downward before the capillary action at the contact portion 221 occurs is the lid top. It is set as the dimension which contacts the surface part 22. FIG. As a result, the liquid content Ld that hangs down on the lid top surface portion 22 is prevented from entering the minute gap between the outer lid 2 and the inner lid 3, and thus the engagement groove 25.
As shown in FIGS. 7-5 (e) and (f), the liquid content Ld that hangs on the lid top surface portion 22 is successively dropped from the flange portion 34, as shown in FIGS. Although it grows in the horizontal direction along the flange portion 34 on the lid top surface portion 22 (though the diameter is enlarged), the portion facing the shoulder portion of the lid top surface portion 22 in the grown liquid content Ld is the shoulder portion. As a result, it flows downward (moves so as to be pulled as a whole) so as to be guided by the R shape (curved surface shape) of the liquid, so that the liquid content Ld is prevented from entering the minute gap between the outer lid 2 and the inner lid 3. Is done.
In addition, regarding the above configuration, in the projecting piece pushing type, a space width 220 W equivalent to the previous creation by the present applicant (Japanese Patent No. 4134105), more precisely, grows in an inverted Fuji mountain shape below the flange portion 34. Since the dimension (a dimension in FIG. 7-5) from the edge part of a drop to the pushing outer edge 256 can be ensured, it is more effective.

(V) Closing work (Fig. 7-6 (viii))
When the engagement state between the engaging protrusion 35 in the inner lid 3 and the raised portion 253 in the outer lid 2 is seen, the pair of raised portions 253 act evenly on the engaging protrusion 35 by the alignment guiding zone 352. In such a state, the outer lid core O2 and the inner lid core O3 are matched (see FIG. 7-2 (v)). In order to close the opening 13 with the inner lid 3 in such a state, the stopper bottom 32 of the inner lid 3 is again directed downward so as to reach the opening 13 of the container 1 and push the outer lid 2 into it. The stopper main body 31 is pushed into the opening 13 by operation.

(I) Plug body part push type closure As mentioned above, there are two types of plug body part push type and protruding piece push type. explain.
When the outer lid 2 and the inner lid 3 are combined so as to engage with each other as shown in FIG. 7-6 (viii) -1, the pushing outer edge 256 of the pushing surface 255 acting for plugging is vertical. When viewed in the cross-sectional direction, it is on the outer side of the stopper main body 31 in the inner lid 3 (the position from the outer side of the main body thickness range 31t to the flange 34). For this reason, when pressing the outer lid 2 to press-fit the inner lid 3 into the opening 13 of the container 1, the upper portion of the plug body 31 of the inner lid 3 can be pushed in almost evenly and reliably. The plug is closed.

Particularly, in the final state in which the outer lid 2 is bayonet-engaged with the inner lid 3, for example, as shown exaggeratedly in FIG. 7-7, the inner lid 3 has the flange portion 34 in the radial direction rather than the plug bottom portion 32. The plug main body 31 is also in a state of being narrowed and inclined (upwardly spread). The reason why the inner lid 3 has such an inwardly expanded shape is that the projection 253 of the outer lid 2 comes into contact with the engaging protrusion 35 of the inner lid 3 as shown in FIG. At 253, the inner expansion state of the inner lid 3 becomes remarkable.
However, even in such a state, in the plug body portion pushing type, the pushing surface 255 pushes evenly above the plug body portion 31 of the inner lid 3 over almost the entire circumference, so that the protrusion 253 projects outward. The stopper main body 31 can be pushed in reliably, and the inner lid 3 can be securely fitted into the container 1.
7-7 corresponds to the cross section taken along the line vv of FIG. 7-2 (v).

(Ii) Protruding piece pushing type closure In this case, as shown in FIG. 7-6 (viii) -2, the pushing outer edge 256 of the pushing surface 255 is an engaging protruding piece of the inner lid 3 when viewed in the vertical cross-sectional direction. The pushing surface 255 is in a state of acting on the engaging protrusion 35.
The reaction force of this push-in occurs between the push-in surface 255 of the engagement groove 25 in the outer lid 2 and the upper surface of the engagement protrusion 35. At this time, the engagement protrusion 35 is above the peripheral edge of the plug body 31. First, the load is concentrated on this part. The overhanging tip 351 falls into an inward state, the upper surface thereof becomes flat, and the tip of the overhanging tip 351 is in a state of gripping the concave wall surface 231 of the engagement groove 25 in the attachment / detachment operation portion 23. It is pushed in while obtaining a stable engagement state. Thereafter, the outer lid 2 is removed from the inner lid 3, and the lid 1 is screwed onto the lid fitting portion 12 of the container 1 in a cover-like manner to completely close the opening 13 of the container 1.

In the above description, the plug body pressing type and the protruding piece pressing type have been described as separate modes. However, for example, as shown in FIG. 11, it is possible to adopt a form in which both types are fused. (This is referred to as a stopper main body pushing and protruding piece pushing type). That is, in the stopper main body pushing and protruding piece pushing type, the inner lid 3 is pushed into the container 1 while pushing the upper portion of the stopper main body 31 over almost the entire circumference, but the protruding tip of the upper tip of the engaging protruding piece 35 351 is formed in an upwardly protruding shape.
Incidentally, FIG. 11 (a) shows a normal closing state, and FIG. 11 (b) shows a state where the outer lid 2 is engaged with the inner lid 3 (a state where the inner lid 3 is opened or closed), This figure (c) has shown the state which put on the work table in the state which engaged the outer lid | cover 2 with the opened inner lid 3.

  The present invention is intended to detach the inner lid 3 under the action as described above. Examples of the container 1 include containers for medicines, containers for beauty / cosmetics, foods such as liquid seasonings, and food ingredients. The present invention can be applied to containers having many inner lids such as containers.

DESCRIPTION OF SYMBOLS 1 Container 11 Container main-body part 12 Lid fitting part 13 Opening part 14 Male screw part

2 outer lid 21 lid body portion 22 lid top surface portion 220 entry prevention space 220L space height 220W space width 221 contact portion

22a Holding surface portion 22b Escape portion 23 Desorption operation portion 231 Concave wall surface 232 Outer wall surface 232a Engaging outer wall surface 232b Pushing outer wall surface 24 Female thread portion 25 Engaging groove 25W Concave groove width 251 Receiving notch 251a Receiving chamfer 252 Catch groove 253p Raised portion 253p Raised base end portion 253g Raised middle portion 253A Alignment guiding surface 253B Alignment guiding raised portion 254 Lifting rib 254a Pulling upper surface 254b Engaging guiding surface 255 Pushing surface 256 Pushing edge

3 Inner lid 31 Plug body 31t Body thickness range 32 Plug bottom 33 Depression 33W Inner wall 34 Flange 34d Flange overhang 35 Engagement protrusion 351 Overhang tip 351a Overhang 352 Alignment induction zone 353 Secure zone

5 Alignment guiding structure W Overhang width O2 Outer lid center core O3 Center lid center core Angle per θ1 Angle per θ2 P Current contact point α Up angle L Liquid content Ld Liquid content (Shizuku)

Claims (8)

Detach and remove the inner lid in a bayonet-engaged manner using the outer lid as a hand tool from a container secured by a stopper-shaped inner lid and an outer lid attached to the inner lid so as to cover the inner lid. In the structure to let
The outer lid has a circular peripheral shape in plan view at the top thereof, and is provided with a detachable operation portion that can be fitted into a recess portion of the inner lid. Further, an outer cover is provided on the outer periphery of the detachable operation portion. A plurality of engaging recesses are formed, including a receiving notch for guiding the fitting into the recess and a catch groove extending continuously in the circumferential direction, and the receiving notch includes an outer lid and an inner lid. A raised portion is provided to stabilize the engagement between the two when engagement with the
On the other hand, the inner lid includes a plug main body part that fits into the opening of the container in a plug shape and closes the inner lid, and a hollow part that is formed inside the upper part of the plug main body and receives the detachment operation part in the outer lid. In addition, on the top of the plug body, a plurality of engagement protrusions are formed that project toward the inside of the recess in plan view.
The inner lid attaching / detaching structure is characterized in that a pushing surface, which is a lower surface of the catch groove in the attaching / detaching operation portion, is formed so that the stopper main body portion can be pushed in from above when combined with the inner lid.
Detach and remove the inner lid in a bayonet-engaged manner using the outer lid as a hand tool from a container secured by a stopper-shaped inner lid and an outer lid attached to the inner lid so as to cover the inner lid. In the structure to let
The outer lid has a circular peripheral shape in plan view at the top thereof, and is provided with a detachable operation portion that can be fitted into a recess portion of the inner lid. Further, an outer cover is provided on the outer periphery of the detachable operation portion. A plurality of engaging recesses are formed, including a receiving notch for guiding the fitting into the recess and a catch groove extending continuously in the circumferential direction, and the receiving notch includes an outer lid and an inner lid. A raised portion is provided to stabilize the engagement between the two when engagement with the
On the other hand, the inner lid includes a plug main body part that fits into the opening of the container in a plug shape and closes the inner lid, and a hollow part that is formed inside the upper part of the plug main body and receives the detachment operation part in the outer lid. In addition, on the top of the plug body, a plurality of engagement protrusions are formed that project toward the inside of the recess in plan view.
This engagement protrusion is formed so that the upper position of the protruding tip portion is higher than the upper end height of the plug body portion in a longitudinal sectional view.
The engagement protrusion on the inner lid and the raised portion on the outer lid attachment / detachment operation portion are in a position where both start engagement, from either a loose engagement state to an engagement secured state. 3. The inner lid attaching / detaching structure according to claim 1 or 2, further comprising an alignment guiding structure.
The alignment guiding structure is provided on the engagement protrusion, and the engagement protrusion is guided toward the engagement completion side from the engagement start side to the catch groove of the attaching / detaching operation portion in the outer lid. It has a zone and an engagement securing zone. In the plan view, the projecting width of the engaging projecting piece is set to be smaller than that of the engagement securing zone, and the engagement securing zone is secured. The inner lid detaching structure according to any one of claims 1 to 3, wherein an extension width is increased toward the zone so as to be continuous with the engagement securing zone.
The engagement protrusions in the inner lid are formed in a pair of two locations facing each other, and the engagement concave grooves formed in the attachment / detachment operation portion in the outer cover are formed in a pair of two locations correspondingly. The detachable structure of the inner lid according to any one of claims 1 to 4.
The receiving notch in the engaging groove formed in the attaching / detaching operation portion of the outer lid forms a receiving chamfer toward the top surface of the lid at the upper edge of the wall surface on the upper inner side. The demounting structure for the inner lid according to any one of claims 1 to 5.
In forming the upper position of the projecting tip of the engagement protrusion of the inner lid higher than the upper end height of the stopper main body, the upper surface of the engagement protrusion or both the upper surface and the lower surface of the engagement protrusion The inner lid detaching structure according to claim 2, wherein the inner lid is attached to the inner lid.
  An intermediate lid that plugs the opening of the lid fitting portion of the container in a plug shape, and an outer lid that closes the lid fitting portion in an outer covering shape, wherein the inner lid and the outer lid are any one of claims 1 to 7. A container characterized in that it has a structure for attaching and detaching the inner lid described in the item.

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