JP6998007B2 - Cover structure and packaging container using this - Google Patents

Description

The present invention relates to a lid structure and a packaging container using the same.

There is known a packaging container in which a sheet-like content such as a face mask or a wet tissue is impregnated with a liquid such as a cleaning liquid, a cosmetic liquid, or a chemical liquid and stored in a folded state. (See Patent Document 1).

The packaging container disclosed in Patent Document 1 has a container body having a substantially trapezoidal cross section that is molded from a synthetic resin or the like and has a substantially trapezoidal cross section, and a bottom in which a film is fixed to the peripheral edge of the container body on the opening side by a heat seal or the like. It is composed of a wall portion and an opening / closing label that freely opens and closes a rectangular elongated hole-shaped outlet formed on the upper wall portion of the container body. The opening / closing label is made of a single or composite synthetic resin film, a laminated material obtained by laminating a synthetic resin film on aluminum foil, etc., and can be peeled off to the upper wall part via an adhesive applied corresponding to the outer periphery of the take-out port. It is pasted.

Further, there is known an outlet plug (corresponding to a lid) which can be attached to an opening of a flexible packaging bag capable of accommodating sheet-like contents such as a wet tissue to open and close the opening (Patent Document 2). ).

The outlet plug disclosed in Patent Document 2 is provided with a spiral weakening line in the middle plug that closes the planned opening portion. The user of the outlet plug can break the weakening line and remove the inner plug from the main body of the outlet plug by pulling the pull ring attached to the inner plug.

Japanese Unexamined Patent Publication No. 2009-07828 Japanese Unexamined Patent Publication No. 2002-225911

In the packaging container of Patent Document 1, the contents may contain a large amount of liquid such as a cleaning liquid. In such a case, there is a problem that the liquid adheres to the periphery of the take-out port when the contents are taken out, the adhesive strength of the adhesive applied to the outer periphery of the take-out port is lowered, and the sealing property is lowered at the time of resealing. was there.

On the other hand, in the lid structure of Patent Document 2, the deterioration of the sealing property can be suppressed, but there is a problem that it is difficult to increase the opening. That is, when a large opening is set in the lid structure of Patent Document 2, a large force is required to break the weakening line, and the removed inner plug extends spirally for a long time, which is bulky and difficult to dispose of. was there.

The present invention has been made in view of such a problem, and a lid structure capable of suppressing deterioration of sealing property by using an inner plug that can be removed with a small force and is not bulky even after being removed, and a lid structure thereof. It is an object of the present invention to provide the used packaging container.

One aspect of the present invention for solving the above problems is to connect the inner plug surrounded by the annular weakening line formed on the container body, the pull ring attached to the end edge of the inner plug, and the container body. An opening / closing body that can be opened and closed with respect to the inner plug, an annular wall extending from the outer edge of the annular weakening line, and an inner ring and an outer ring extending from the surface facing the annular wall of the opening / closing body. A first weakening line group consisting of a plurality of weakening lines extending on the inner plug from a plurality of positions included in one of the annular weakening lines divided into two by a predetermined straight line passing through the pull ring. And a second weakening line group consisting of a plurality of weakening lines extending on the inner plug from a plurality of positions included in the other divided into two, each point where one of the plurality of positions is positively projected onto a predetermined straight line. The inner ring abuts on the inner peripheral surface of the annular wall with the opening and closing body closed, and the points obtained by positively projecting the other plurality of positions onto a predetermined straight line are formed so as to be arranged alternately. The outer ring engages within a predetermined range including the outer peripheral surface of the annular wall and at least the opposite side of the connecting portion between the container body and the opening / closing body, from the surface of the opening / closing body to the position where the inner ring and the opening / closing body abut. The distance is shorter than the distance from the surface of the opening / closing body to the position where the annular wall and the outer ring engage, and when the opening / closing body is changed from the open state to the closed state, the annular wall and the outer ring are engaged. It is a lid structure in which the annular wall and the inner ring come into contact with each other after being fitted .

Another aspect of the present invention is a packaging container having the above-mentioned lid structure and integrally formed with the storage structure.

According to the present invention, it is possible to provide a lid structure capable of suppressing deterioration of sealing property and a packaging container using the inner plug, which can be removed with a small force and is not bulky even after being removed. ..

A plan view and a cross-sectional view showing a state in which the opening / closing body of the packaging container provided with the lid structure according to the embodiment of the present invention is opened. A plan view and a cross-sectional view showing a closed state of an opening / closing body of a packaging container provided with a lid structure according to an embodiment of the present invention. Enlarged sectional view of a packaging container provided with a lid structure according to an embodiment of the present invention. A plan view showing a method of removing an inner plug from a packaging container having a lid structure according to an embodiment of the present invention. A plan view and a cross-sectional view showing a closed state of the opening / closing body of the packaging container provided with the lid structure according to the modified example of the present invention.

A packaging container 100 having a lid structure according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 shows a plan view (upper view of FIG. 1) of the packaging container 100 in a state where the opening / closing body 300 is open, and a cross-sectional view (lower view of FIG. 1) cut along the AA'line. Further, FIG. 2 shows a plan view (upper view of FIG. 2) of the packaging container 100 with the opening / closing body 300 closed and a cross-sectional view (lower view of FIG. 2) cut along the line BB'. In the following description, for convenience, the vertical direction when the packaging container 100 is upright (the vertical direction of the paper surface in the lower figures of FIGS. 1 and 2) is referred to as up and down.

The packaging container 100 includes a container body 200 and an opening / closing body 300 connected to the container body 200 by a hinge 210 which is a connecting portion provided on the container body 200. The container body 200 and the opening / closing body 300 can be manufactured by integral molding.

<Container body>
The container body 200 is a container provided with a storage structure for accommodating contents (not shown). As shown in FIGS. 1 and 2, the container body 200 is a box-shaped container having a storage space inside, and the lower surface is open. The container body 200 is configured on the upper surface including a hinge 210, a recess 270, an inner plug 230 surrounded by an annular weakening line 220, and an annular wall 250 extending upward from the outer edge of the annular weakening line 220. To. The container body 200 can be used, for example, by storing a sheet-like content and a liquid such as a cleaning liquid in a storage space, and then sealing a film in the opening on the lower surface.

(Recess)
The recess 270 is a recess in which the opening / closing body 300 substantially overlaps when the opening / closing body 300 is closed. As shown in FIG. 1, the recess 270 is formed by recessing a part of the upper surface of the container body 200 in a rectangular shape substantially in the center of the upper surface of the container body 200 so as to correspond to the shape of the opening / closing body 300.

(Inner plug)
The inner plug 230 is a member that closes the planned opening portion of the container body 200. As shown in FIG. 1, the inner plug 230 is surrounded by an annular weakening line 220 formed substantially in the center of the recess 270. The inner plug 230 has a pull ring 260 attached to the edge of the upper surface via a support column, and a weakening line group 240 composed of a plurality of weakening lines (first weakening line group 241 and second weakening line group 242) on the lower surface. It is formed.

(Ring road weakening line)
The annular weakening line 220 is a weakening line that triggers the removal of the inner plug 230 from the container body 200. As shown in the upper part of FIG. 1, the annular weakening line 220 can be provided, for example, by forming an elliptical half-cut in the recess 270. The shape of the annular weakening line 220 is not particularly limited as long as it is annular, but in consideration of the ease of taking out the contents and the ease of removing the inner plug 230, an elliptical shape or an ellipse including a pair of arcs and a pair of straight lines is included. The shape (track shape) and the like are preferable. As shown in FIGS. 1 and 2, the half cut of the annular weakening line 220 may be formed on the lower surface of the recess 270 or on the upper surface. The wall thickness of the annular weakening line 220 can be, for example, 0.20 mm or more and 0.30 mm or less.

(Weakened lines)
The weakening line group 240 is provided to reduce the force required for breaking the annular weakening line 220 by controlling the posture of the inner plug 230 when the inner plug 230 is removed from the container main body 200. The weakening line group 240 is composed of a first weakening line group 241 and a second weakening line group 242. As an example, in the weakening line group 240, as shown in the upper figure of FIG. 1, three linear weakening lines extending from the annular weakening line 220 onto the inner plug 230 are arranged in a comb-teeth shape at predetermined intervals. The first weakening line group 241 and the second weakening line group 242 can be arranged and formed so as to mesh with each other. Both the first weakening line group 241 and the second weakening line group 242 are formed so that one end is in contact with the annular weakening line 220 and the other end is not in contact with the annular weakening line 220.

The first weakening line group 241 and the second weakening line group 242 are not limited to the above-mentioned form. That is, when, for example, the inner plug 230 is divided into two by a virtual straight line L passing through the pull ring 260 and the annular weakening line 220 is also divided into two, the first weakening line group 241 is divided into the annular weakening line. The 220 is composed of a plurality of weakening lines extending on the inner plug 230 from a plurality of positions included in one of the two divisions, and the second weakening line group 242 is in the middle from a plurality of positions included in the other of the two divisions. Each point is composed of a plurality of weakening lines extending on the plug 230, and each point where one plurality of positions are orthographically projected onto a predetermined straight line L and each point where the other plurality of positions are orthographically projected onto a predetermined straight line L. , It may be formed so as to be arranged alternately. The wall thickness of the weakening line group 240 can be, for example, 0.4 mm or more and 0.8 mm or less.

A gate for filling the inner plug 230 provided with the weakening line group 240 with resin may be provided, for example, between the support of the pull ring 260 and the weakening line constituting the weakening line group 240 closest to the support. can. The resin filled from this gate can be filled in the inner plug 230 by passing between the weakening line group 240 and the annular weakening line 220.

(Ring road)
The annular wall 250 is a member for sealing the packaging container 100 by abutting and engaging with each of the inner ring 310 and the outer ring 320 formed on the opening / closing body 300. As shown in FIGS. 1 and 2, the annular wall 250 extends upward (stands up) from the outer edge of the annular weakening line 220, and is formed so as to have an elliptical shape in a plan view as an example. FIG. 3 shows how the annular wall 250 is fitted with the outer ring 320 and the inner ring 310. FIG. 3 is an enlarged cross-sectional view of portion C of FIG. As shown in FIG. 3, an engaging protrusion 251 that engages with the outer ring 320 projects from the upper end outer peripheral surface of the annular wall 250.

<Opening and closing body>
The opening / closing body 300 is a member that is connected to the container body 200 by a hinge 210 and is provided so as to be openable / closable with respect to the inner plug 230. As shown in FIGS. 1 and 2, the opening / closing body 300 includes an inner ring 310 and an outer ring 320 extending (hanging) from the surface of the opening / closing body 300 facing the annular wall 250 of the container body 200. As shown in FIG. 3, the packaging container 100 can be sealed by engaging and abutting each of the inner ring 310 and the outer ring 320 on the annular wall 250. At the end of the opening / closing body 300 opposite to the hinge 210, a corrugated finger hook portion 330 for opening the opening / closing body 300 is provided. The user of the packaging container 100 puts a finger between the concave portion 331 of the finger hook portion 330 and the concave portion 270 of the container body 200, and then hooks the finger on the convex portion 332 of the finger hook portion 330 to open and close the body 300. Can be lifted and opened.

(Inner ring)
The inner ring 310 is formed so as to abut on the inner peripheral surface of the annular wall 250 with the opening / closing body 300 closed. As shown in FIG. 3, with the opening / closing body 300 closed, the tip of the outer peripheral surface of the inner ring 310 abuts on the inner peripheral surface of the annular wall 250, and the joint portion of the inner ring 310 with the opening / closing body 300. The inner ring 310 may be formed so as to extend outward from the surface of the opening / closing body 300 so that a gap is formed in the area surrounded by the annular wall 250.

(Outer ring)
The outer ring 320 is formed so as to engage with the outer peripheral surface of the annular wall 250 in a predetermined range including at least the opposite side of the hinge 210 with the opening / closing body 300 closed. As shown in FIG. 3, the outer ring 320 includes an engaging claw 321 protruding from the tip of the inner peripheral surface facing the annular wall 250, and the engaging claw 321 is an engagement formed on the outer peripheral surface of the annular wall 250. Engage with protrusion 251. As shown in the upper part of FIG. 1, the engaging claw 321 is formed in a predetermined range including the opposite side of the hinge 210 of the outer ring 320. By forming the engaging claw 321 in this range, the opening / closing body 300 can be closed while being pulled toward the direction opposite to the hinge 210. Therefore, even when the extension direction of the hinge 210 is set to the lateral direction of the inner plug 230 as in the packaging container 100, it is possible to suppress play in the longitudinal direction of the opening / closing body 300 and improve the airtightness. can.

As shown in FIG. 3, when the opening / closing body 300 is closed, the distance D1 from the surface of the opening / closing body 300 to the position where the inner ring 310 and the annular wall 250 abut is the distance D1 from the surface of the opening / closing body 300 to the annular wall 250. It is preferable that the engagement projection 251 is formed so as to be shorter than the distance D2 to the engagement position between the engagement protrusion 251 and the engagement claw 321 of the outer ring 320.

By setting the heights of the inner ring 310 and the outer ring 320 so as to have the above relationship (distance D1 < distance D2), the tip of the annular wall 250 is sandwiched from two positions having different heights. As a result, the tip of the annular wall 250 can be pressed toward the engaging claw 321 of the outer ring 320. Therefore, the sealing performance of the packaging container 100 by the opening / closing body 300 can be improved as compared with the case where the tip of the annular wall 250 is sandwiched at the same height.

Further, by setting the contact position of the inner ring 310 above the engagement position of the outer ring 320, the end portion of the opening / closing body 300 opposite to the hinge 210 is lifted upward to form the outer ring 320. The opening / closing body 300 can be easily opened by disengaging the engagement with the annular wall 250 with a slight force.

Further, it is preferable that the upper end surface (top surface) of the annular wall 250 comes into contact with the surface of the opening / closing body 300 in a state where the opening / closing body 300 is closed. By setting the annular wall 250 in this way, the contact area between the annular wall 250 and the opening / closing body 300 is increased, and the sealing property is improved. Further, it can be expected that a film is formed by the liquid contained in the contents in the space surrounded by the tip portion of the annular wall 250 and the inner ring 310 and the outer ring 320 to improve the sealing property. In order to obtain these effects, the width D3 of the upper end surface of the annular wall 250 is preferably 1 mm or more.

Further, when the opening / closing body 300 is changed from the open state to the closed state, after the engaging claw 321 of the outer ring 320 gets over the engaging protrusion 251 of the annular wall 250 and engages with the opening / closing body 300, the upper end surface of the annular wall 250 is engaged. It is preferable that the dimensions of each part are set so that the surface of the opening / closing body 300 comes into contact with the surface of the opening / closing body 300, and then the annular wall 250 and the end portion of the inner ring 310 come into contact with each other.

By setting the dimensions of each part in this way, the annular wall 250 can be slightly tilted toward the inner ring 310 by the outer ring 320, and then the inner ring 310 can be brought into contact with the inner ring 310 from behind. As a result, the annular wall 250 can be sandwiched between the inner ring 310 and the outer ring 320 while being elastically deformed by a series of movements. Therefore, while closing the opening / closing body 300 by a simple operation, the annular wall 250 can be surely brought into close contact with the inner ring 310 and the outer ring 320, and the sealing performance of the packaging container 100 by the opening / closing body 300 can be improved.

(How to remove the inner plug)
Next, a method of removing the inner plug 230 will be described with reference to FIG. (A), (b), (c), (d), and (e) of FIG. 4 are partial plan views of the inner plug 230 of the packaging container 100.

The user of the packaging container 100 pulls the pull ring 260 attached to the end edge of the inner plug 230 with a predetermined force toward the other end side as shown by the white arrow. The direction of this force is substantially the same as the stretching direction of the straight line L.

In the following, for convenience, the annular weakening line 220 on the left side of the figure is referred to as an annular weakening line 220a, and the annular weakening line 220 on the right side of the figure is referred to as an annular weakening line 220b with the pull ring 260 interposed therebetween. Further, the progress point of the break generated on the annular weakening line 220a is referred to as a break portion 280a, and the progress point of the break generated on the annular weakening line 220b is referred to as a break portion 280b. Further, the plurality of weakening lines constituting the weakening line group 240 are referred to as weakening lines 240a, weakening lines 240b, weakening lines 240c, weakening lines 240d, weakening lines 240e, and weakening lines 240f from the side closer to the pull ring 260.

First, a break occurs in the annular weakening line 220 at the end of the inner plug 230 on the pull ring 260 side. Then, by further pulling the pull ring 260, each of the broken portion 280a and the broken portion 280b simultaneously advances on the annular weakening line 220a and the annular weakening line 220b to the vicinity of the weakening line 240a as shown by the black arrow (FIG. 4). (A)).

When the broken portion 280b reaches the contact point between the annular weakening line 220b and the weakening line 240a, the inner plug 230 bends upward along the weakening line 240a because the weakening line 240a is formed on the lower surface of the inner plug 230. In this way, when the broken portion 280b reaches the weakening line 240a, the force pulling the inner plug 230 from the pull ring 260 acts on the bending of the inner plug 230 along the weakening line 240a, and acts on the progress of the broken portion 280b. It becomes difficult. As a result, the broken portion 280b temporarily stops proceeding at the contact point with the weakening line 240a on the annular weakening line 220b.

On the other hand, since the weakening line 240a is not in contact with the annular weakening line 220a, the fractured portion 280a can proceed on the annular weakening line 220a without stopping ((b) in FIG. 4).

When the fractured portion 280a reaches the point of contact between the annular weakening line 220a and the weakening line 240b, the inner plug 230 bends upward along the weakening line 240b. In this way, when the broken portion 280a reaches the weakening line 240b, the force pulling the inner plug 230 from the pull ring 260 acts on the bending of the inner plug 230 along the weakening line 240b, and acts on the progress of the breaking portion 280a. It becomes difficult. As a result, the break portion 280 a temporarily stops proceeding at the contact point with the weakening line 240b on the annular weakening line 220a.

When both the broken portion 280a and the broken portion 280b reach the weakening line 240b and the weakening line 240a and stop the progress ((c) in FIG. 4), the force for pulling the inner plug 230 from the pull ring 260 is closer to the pull ring 260. It acts again on the progression of part 280b. Then, the fractured portion 280b that has started to advance again advances on the annular weakening line 220b to the weakening line 240c without stopping ((d) in FIG. 4 and (e) in FIG. 4).

Hereinafter, although not shown, by pulling the inner plug 230 from the pull ring 260, the broken portion 280a and the broken portion 280b are alternately advanced on the annular weakening line 220a and the annular weakening line 220b, respectively, as described above. Then, by advancing the broken portion 280a and the broken portion 280b on all the annular weakening lines 220a and the annular weakening line 220b, that is, by breaking all the annular weakening lines 220, the inner plug 230 is removed from the container body 200. Can be removed.

The order of progress of the fractured portion 280a and the fractured portion 280b after the fractured portion 280a has passed through the weakening line 240f or after the fractured portion 280b has passed through the weakening line 240e is not particularly limited. Depending on the direction of pulling of the inner plug 230 from the pull ring 260, the broken portion 280a and the broken portion 280b proceed simultaneously and connect at the end opposite to the attached end of the pull ring 260 of the inner plug 230. Alternatively, only one of them may proceed and be connected by the weakening line 240e or the weakening line 240f.

By continuing to pull the pull ring 260 as described above, the fractured portion 280a and the fractured portion 280b alternately travel on the annular weakening line 220. Therefore, the force required to remove the inner plug 230 simultaneously breaks the annular weakening line 220a and the annular weakening line 220b to form the broken portion 280a and the broken portion 280b at the same time, except until the initial weakening line 240a is reached. It can be made smaller than the case.

The force required for pulling the inner plug 230 by the pull ring 260 can be reduced by bringing the traveling annular weakening line 220 of the broken portion 280a and the broken portion 280b closer to the pulling direction of the inner plug 230 by the pull ring 260. Therefore, it is preferable that the pulling direction is the longitudinal direction of the annular weakening line 220, that is, the straight line L extends in the longitudinal direction of the annular weakening line 220.

Further, the inner plug 230 thus removed from the container main body 200 is bent along the weakening line group 240 to become compact in a roll shape, and is therefore suitable for reducing the volume of dust.

(Action / effect)
As described above, according to the present invention, the inner plug 230 can be removed with a small force even when a large opening is adopted as compared with the conventional structure in which the weakening line is formed in a spiral shape. .. Further, the inner plug 230 after removal is not bulky because it becomes a roll shape.

Further, since the opening / closing body 300 is configured to abut and engage with the annular wall 250 by the outer ring 320 provided with the inner ring 310 and the engaging claw 321, the sealing performance is maintained.
It is possible to suppress the deterioration of the sealing property. Further, the user of the packaging container 100 can know that the packaging container 100 is securely sealed due to the impact when the engaging portion is engaged.

Further, by manufacturing the container body 200 and the opening / closing body 300 by integral molding using resin or the like, the step of attaching the opening / closing film to the container body becomes unnecessary, so that the manufacturing process can be reduced and the packaging can be performed at low cost. The container 100 can be manufactured. Further, since the rigidity of the container body 200 can be increased, the opening / closing body 300 can be easily opened / closed. Further, if the packaging container 100 is used before the contents are stored, it can be stacked and stored by closing the opening / closing body 300.

<Modification example>
The connection form between the container body and the opening / closing body is not limited to the form of the packaging container 100. FIG. 5 shows a plan view of the packaging container 101 according to a modified example having a different connection form from the packaging container 100 (upper view of FIG. 5), a cross-sectional view cut along the DD'line (lower view of FIG. 5), and a connecting portion. The enlarged sectional view of 211 is shown. The packaging container 101 and the packaging container 100 differ only in the connection form between the container body and the opening / closing body. That is, in the packaging container 100, the container body 200 and the opening / closing body 300 are integrally molded and connected by a hinge 210. On the other hand, in the packaging container 101, the container body 201 and the opening / closing body 301 are formed separately and are connected by the connecting portion 211. The portion of the packaging container 101 other than the connecting portion 211 is formed in the same manner as the packaging container 100.

The connecting portion 211 of the packaging container 101 is composed of two bearing portions 290 protruding from the upper surface of the container main body 201 and two rotating shafts 340 formed on the opening / closing body 301 so as to be fitted to the bearing portion 290. As shown in FIG. 5, the rotating shaft 340 is rotatably fitted to the bearing portion 290, whereby the opening / closing body 301 is connected to the container main body 201 and is provided to be openable / closable with respect to the inner plug 230.

The present invention can be suitably used for a packaging container and its lid structure.

100, 101 Packaging container 200, 201 Container body 210 Hinge 211 Connecting part 220 Circular weakening wire 230 Inner plug 240 Weakening wire group 241 First weakening wire group 242 Second weakening wire group 250 Circular wall 251 Engagement protrusion 260 Pull ring 270 Recess 280a 280b Breaking part 290 Bearing part 300, 301 Opening and closing body 310 Inner ring 320 Outer ring 321 Engaging claw 330 Finger hook part 331 Recessed part 332 Convex part 340 Rotating shaft

Claims (4)

An inner plug surrounded by an annular weakening line formed on the container body, and a pull ring attached to the end edge of the inner plug .
From the opening / closing body connected to the container body and freely opened / closed with respect to the inner plug, the annular wall extending from the outer edge of the annular weakening line, and the surface of the opening / closing body facing the annular wall. A lid structure including an extending inner ring and an outer ring .
A first weakening line group consisting of a plurality of weakening lines extending on the inner plug from a plurality of positions included in one of the annular weakening lines divided into two by a predetermined straight line passing through the pull ring.
The second weakening line group consisting of a plurality of weakening lines extending from the plurality of positions included in the other divided into two onto the inner plug is formed.
Each point obtained by orthographically projecting one of the plurality of positions onto the predetermined straight line and each point obtained by orthographically projecting the other plurality of positions onto the predetermined straight line are formed so as to be arranged alternately .
With the opening / closing body closed
The inner ring abuts on the inner peripheral surface of the annular wall and
The outer ring engages in a predetermined range including the outer peripheral surface of the annular wall and at least the opposite side of the connecting portion between the container body and the opening / closing body.
The distance from the surface of the opening / closing body to the position where the inner ring and the annular wall abut is shorter than the distance from the surface of the opening / closing body to the position where the annular wall and the outer ring engage. ,
A lid structure in which the annular wall and the inner ring come into contact with each other after the annular wall and the outer ring are engaged when the opening / closing body is changed from the open state to the closed state . The lid according to claim 1, wherein the annular weakening line has an elliptical shape or an oval shape in a plan view, and the predetermined straight line extends in the longitudinal axis direction of the elliptical shape or the oval shape. Part structure. The lid structure according to claim 1 or 2, wherein the width of the upper end surface of the annular wall is 1 mm or more. A packaging container having the lid structure according to any one of claims 1 to 3 and integrally formed with the storage structure.

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