JPH0885572A - Liquid container - Google Patents

Abstract

PURPOSE: To enable a cap-closing of a liquid container having a thin wall placed on the inside of a corrugated cardboard case using a force cap by a method wherein a circular support member is provided which has a flange part engageable with the upper surface of the corrugated cardboard case around the outer periphery of the upper end thereof and an engaging raised part engageable with the engaging face of the outer periphery of a mouth part around the inner periphery of the lower end thereof and which is engaged with a window hole. CONSTITUTION: When a force cap 11 is placed on the mouth part 5 of the inner thin wall container 3 of a corrugated cardboard case 2, and is pressed thereagainst after the container is filled with liquid, the resulting pressing force is supported on the corrugated cardboard case 2 via a circular support member 13 by the engagement between the engaging face 9 of the mouth part 5 and the engaging raised part 16 of the circular support member 13, and between the flange part 15 of the circular support member 13 and the upper surface of the corrugated cardboard case 2 and, by the support force resisting to the pressing force of the cap 11, the engaging outer peripheral edge 11a of the cap 11 is engaged with the engaging face 9, whereby the container can be closed with the cap 11. Therefore, although a liquid container 1 has the thin wall container 3 placed on the inside of the corrugated cardboard case 2, it can be closed with the force cap 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid container, and more particularly to a liquid container in which a synthetic resin thin-walled container is housed in a cardboard case.

[0002]

2. Description of the Related Art As a liquid container used for transporting liquid chemicals such as commercial detergents and various liquid food materials for commercial use, tin cans known as "Itoto cans" have been widely used. Further, for example, in the case of a liquid container used for carrying a detergent or the like containing a strong oxidizer such as sodium hypochlorite, since tin cans are corroded by these acidic chemicals, a chemically resistant synthetic material such as polyethylene is internally formed. A resin-made thin-walled container was used.

However, since the tin can after using the contained liquid is bulky in comparison with its weight, there is a problem that it takes space, labor and cost to store and dispose of it, and in particular, a thin-walled container made of synthetic resin is incorporated. Even if the collected products were collected, post-processing would take a great deal of work, so the collection companies could not collect them, and collection and disposal were extremely difficult.

Therefore, in recent years, as a solution to such a problem, a liquid container in which a thin-walled container made of synthetic resin is housed in a corrugated cardboard case has been used so that it can be easily incinerated after use. There is.

According to such a liquid container, the corrugated cardboard case can be incinerated as a combustible material and can be easily collected and reused because it is not bulky when folded, and a thin-walled container can be folded compactly and easily. It has the advantage that it can be discarded.

[0006]

However, in the case of using a liquid container in which a thin container is housed in a corrugated cardboard case, there are advantages as described above, but the pressing cap cannot be used because the thin container is flexible. Therefore, when storing the liquid in the container, flow the thin-walled container into the filling line to fill the liquid in the container, then close the mouth with a screw cap and then open the bottom. It is necessary to cover the cardboard case from above the thin-walled container, then turn the cardboard case upside down to close its bottom, then turn it upside down again and put it upside down to carry it out. Not only is it impossible to use liquid filling equipment that uses a cap to close the lid, but the filling process is also complicated, resulting in large-scale and complicated equipment, resulting in a significant increase in equipment costs. There is a cormorant problem.

Further, since the thin-walled container is used, it is not possible to use the simple and inexpensive press-fitting type cap used in the conventional tin can, and the thin-walled container itself is required because the screw-type cap is required. However, there is a problem that the cost becomes high and it takes time to open and close the mouth.

In view of the above-mentioned problems of the prior art, the present invention is a liquid container which is formed by incorporating a thin container inside a corrugated cardboard case and which can be closed with a press-fitting cap and filled with liquid as in the conventional case. The purpose is to propose.

[0009]

In order to achieve the above-mentioned object, the present invention, if indicated by the reference numerals in the drawings, in the invention according to claim 1, is synthesized in a corrugated cardboard case 2. In the liquid container 1 in which the resin thin container 3 is installed, the thin container 3 is provided with a mouth portion 5 which can be opened and closed by a cap 11 of a pressing type, and an annular engaging portion 8 is provided on the outer periphery of the mouth portion 5 so as to project. The lower surface side of the engaging portion 8 is used as an engaging surface 9, a window hole 12 is formed in a portion of the upper surface of the corrugated cardboard case 2 corresponding to the mouth portion 5, and a flange portion which engages with the upper surface of the corrugated cardboard case 2 on the outer periphery of the upper end. 15 is provided with an annular support member 13 having an engaging collar 16 that engages with the engaging surface 9 on the outer periphery of the mouth 5 at the inner periphery of the lower end,
A configuration is adopted in which the annular support member 13 is fitted in the window hole 12.

Further, in the invention according to claim 2, the flange portion 15 of the annular support member 13 has an outer diameter such that a part of the outer peripheral portion thereof is close to or in contact with the outer periphery of the corrugated cardboard case 2. The configuration described in 1 is adopted.

Further, in the invention according to claim 3, the engaging collar 16 of the annular supporting member 13 is formed in an annular shape, and a notch 17 is formed at one position in the circumferential direction thereof. Is adopted.

Further, the invention according to claim 4 employs the structure according to claim 1 in which the reinforcing cylinder frame 21 is fitted to the inner surface of the peripheral wall 2a of the corrugated cardboard case 2.

[0013]

According to the first aspect of the invention, after filling the thin-walled container 3 housed in the corrugated cardboard case 2 with the liquid, the mouth portion 5 is formed.
When the cap 11 of the press-fitting type is put on and pressed down, the pressing force is such that the engaging surface 9 of the mouth portion 5 is engaged with the engaging flange 16 of the annular supporting member 13 and the flange portion 1 of the annular supporting member 13.
5 and the upper surface of the corrugated cardboard case 2 are supported by the corrugated cardboard case 2 via the annular support member 13, and the outer peripheral engagement edge 11a of the cap 11 is engaged by the supporting force against the pressing force of the cap 11. It can be engaged with the surface 9 and can be closed by the cap 11. Therefore, even though it is the liquid container 1 in which the thin container 3 is housed in the cardboard case 2, it can be closed by the press-fitting cap 11, and the cardboard case 2 Since the mouth portion 5 is exposed through the window hole 12 formed in the above, it can be handled and filled in exactly the same way as in a tin can, and the conventional filling equipment can be used as it is to fill the liquid.

When the lid is opened, the central portion 11 of the cap 11 is opened.
It is necessary to strongly press a to deform the central portion 11a by sinking and to disengage the outer peripheral engaging edge 11a from the engaging surface 9 in conjunction with this deformation. In this respect, the invention according to claim 1 According to the above, the cap 11 includes the engagement surface 9 of the mouth portion 5 and the engagement flange 16 of the annular support member 13 and the flange portion 15 of the annular support member 13 and the corrugated cardboard case 2 as described above.
Since it is supported by the corrugated cardboard case 2 through the annular support member 13 due to the engagement with the upper surface, the mouth portion 5 that engages the cap 11 should be recessed inside even if a strong pressing force is applied to the cap 11. Therefore, by strongly pressing the central portion 11a of the cap 11, the central portion 11a of the cap 11 is deformed inwardly by the supporting force, and the outer peripheral engagement edge 11b of the cap 11 is moved in the above-described manner in association with this deformation. It can be disengaged from the engagement surface 9.

According to the second aspect of the present invention, since the flange portion 15 of the annular support member 13 is close to or in contact with the outer periphery of the corrugated cardboard case 2, the pressing force is the annular support member 13.
Since it is directly transmitted from the flange portion 15 to the peripheral wall 2a of the corrugated cardboard case 2 and received, it is possible to obtain a stronger supporting force against the pressing force of the cap 11, and this is because of this strong supporting force. The outer peripheral engagement edge 11a of the above is securely engaged with the engagement surface 9 to close the lid,
The outer peripheral engagement edge 11a of the cap 11 can be reliably separated from the engagement surface 9 to open the lid.

According to the third aspect of the present invention, since the engaging collar 16 of the annular supporting member 13 is formed substantially continuously in an annular shape, the engaging collar 16 is pressed by the cap 11 pressing force.
Is not easily deformed, the pressing force can be stably supported, and the cut 17 is formed at one position in the circumferential direction, so that the mouth 5 is strongly pressed into the annular support member 13 to engage the engaging surface 9. The collar 16 can be engaged.

According to the invention of claim 4, since the reinforcing cylinder frame 21 is fitted to the inner surface of the peripheral wall 2a of the corrugated board case 2, the supporting strength of the pressing force can be increased and the corrugated board frame 21 can be used. The surface strength of the peripheral wall 2a of 2 is improved, and it is possible to prevent the body from bulging and secure sufficient strength even when the sheets are stacked and stored in multiple stages.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquid container according to an embodiment of the present invention will be described below with reference to FIGS.

Reference numeral 1 denotes a liquid container, which is constructed by incorporating a thin-walled container 3 made of synthetic resin such as polyethylene in a cardboard case 2. In the corrugated cardboard case 2, bottom flaps 2b are continuously provided at the lower four edges of the rectangular tubular peripheral wall 2a, and upper surface flaps 2c are continuously provided at the upper four edges. Reference numeral 20 is a handle hole. In the vicinity of one corner on the upper surface of the thin container 3, a mouth forming member 4 made of a synthetic resin molded product such as polyethylene is formed.
Is formed and the synthetic resin sheet 3a forming the entire thin-walled container 3 is welded to the welded portion 4a formed on the outer peripheral edge thereof to form the mouth portion 5.

In the mouth portion forming member 4, a flange portion 7 having a thin welded portion 4a formed on the outer peripheral portion is provided on the outer periphery of the lower end of a short tubular tubular mouth portion 6, and a press-fit cap is provided on the outer periphery of the upper end. An annular engaging portion 8 to which 11 is fitted is provided so as to project, and a downward engaging surface 9 having an appropriate width is formed on the lower surface of the annular engaging portion 8. The annular engaging portion 8 is formed in a curved surface or a tapered shape whose diameter decreases upward. An inner lid 10 made of synthetic resin is fitted on the inner circumference of the barrel opening 6. 10a
Is a handle for removal which is integrally provided inside the inner lid 10.

A window hole 12 is formed in a portion of the upper surface flap 2c of the cardboard case 2 corresponding to the opening 5 of the thin container 3, and the opening 5 is exposed on the outer surface of the cardboard case 2. An annular support member 13 made of synthetic resin is fitted in the window hole 12. Annular support member 13
Has a flange portion 15 that engages with the upper surface of the upper surface flap 2c on the outer periphery of the upper end of the fitting cylinder portion 14, and an engaging collar 16 that engages with the engaging surface 9 of the outer periphery of the mouth portion 5 on the inner periphery of the lower end. ing. The flange portion 15 is formed with an outer diameter such that a part of the outer peripheral portion thereof is close to or in contact with the outer periphery of the corrugated board case 2. Further, as shown in FIG. 4, the engaging collar 16 is formed in an annular shape, and a notch 17 is formed at one position in the circumferential direction thereof. The engagement brim 16 is not limited to a ring shape and may have a shape in which a plurality of engagement brims are projected, if devised so as to support the pressing force.

In the above structure, in order to form the liquid container 1, the bottom flap 2b and the top flap 2c of the corrugated cardboard case 2 are opened, the top flap 2c is closed, and the window hole 12 formed in the top flap 2c is opened. The annular support member 13 is fitted and the flange portion 15 is engaged with the upper surface thereof. Next, in that state, the thin container 3 is inserted into the corrugated cardboard case 2 from the bottom side thereof, and the mouth portion 5 thereof is strongly press-fitted into the inner circumference of the engaging collar 16 of the annular support member 13 to close the outer circumference of the mouth portion 5. The engagement collar 16 is engaged with the engagement surface 9. At this time, since the annular engaging portion 8 is formed to have a small diameter toward the upper side, it can be press-fitted relatively easily. Finally, when the bottom flap 2b is closed, the thin container 3 is provided inside the corrugated cardboard case 2 and the liquid container 1 in which the opening 5 is exposed is formed. The inner lid 10 and the cap 11 are fitted after filling the liquid.

At the time of filling the liquid, the liquid is filled by flowing the liquid container 1 with the mouth 5 open to the filling line. After that, when the inner lid 10 is fitted into the mouth portion 5 and the pressing cap 11 is put on the inner lid 10 and pressed down, the pressing force is applied to the engaging surface 9 of the mouth portion 5 and the engaging collar 1 of the annular support member 13.
6 is supported by the corrugated cardboard case 2 via the flange portion 15 of the annular support member 13 by the engagement of the cap 6,
By these supporting forces against the pressing force of 1, the outer peripheral engagement edge 11b of the cap 11 can be elastically deformed to engage with the engagement surface 9 of the mouth portion 5 to close the lid.

At this time, the flange portion 1 of the annular support member 13
Since 5 is close to or in contact with the outer circumference of the corrugated cardboard case 2, the pressing force is directly transmitted from the flange portion 15 of the annular support member 13 to the peripheral wall 2a of the corrugated cardboard case 2, and is supported to resist the pressing force of the cap 11. The force can be obtained more strongly, and this strong support force ensures that the outer peripheral engagement edge 11a of the cap 11 is engaged with the engagement surface 9 to close the lid or the outer peripheral engagement of the cap 11. The joint edge 11a can be reliably separated from the engagement surface 9 to open the lid. Further, since the engaging collar 16 of the annular support member 13 is formed substantially continuously in an annular shape, the engaging collar 16 is unlikely to be deformed by the pressing force of the cap 11, and the pressing force can be stably supported. In addition, in this way, the engaging collar 16
Since the cut 17 is formed at one position in the circumferential direction even when the ring is formed in an annular shape, the engaging collar 16 is engaged with the engaging surface 9 by strongly pressing the mouth portion 5 into the annular support member 13. You can

The liquid container 1 filled with the liquid is stored / transported and delivered to the customer. After that, when the liquid is taken out from the liquid container 1 in the consumer, the central portion 11a of the cap 11 is strongly pressed to deform the central portion 11a by immersion, and the outer peripheral engagement edge 11a is interlocked with the deformation. Although it is necessary to disengage from the engagement surface 9, according to the present invention, the cap 11 has the engagement surface 9 of the mouth portion 5 and the engagement flange 16 of the annular support member 13 and the annular shape as described above. Since the flange portion 15 of the support member 13 and the upper surface of the corrugated board case 2 are supported by the corrugated board case 2 via the annular support member 13, the cap 11 is engaged even if a strong pressing force is applied to the cap 11. The mating mouth portion 5 does not sink into the inside, and therefore, as shown in FIG. 3B, the central portion 11a of the cap 11 is strongly pressed to strongly support the central portion 11a of the cap 11 by the supporting force. Immersive deformed inwardly, open the outer peripheral engagement edge 11b of the cap 11 is detached from the engagement surface 9 in conjunction with the deformation capped,
After that, the liquid can be extracted by removing the inner lid 10.

Thus, according to the present embodiment, the mouth 5 is exposed on the upper surface of the corrugated cardboard case 2 even though it is the liquid container 1 in which the thin-walled container 3 is housed in the corrugated cardboard case 2. The liquid can be filled by handling it in exactly the same manner as described above, and then the lid can be closed with the pressing cap 11, so that the liquid can be filled using the conventional filling equipment as it is.

In the above-described embodiment, no reinforcing member is arranged inside the peripheral wall 2a of the corrugated cardboard case 2, but FIG.
As shown in, a reinforcing cylinder frame 21 made of cardboard or the like may be fitted and disposed on the inner surface of the peripheral wall 2a of the cardboard case 2. The upper and lower ends of the cylindrical frame 12 are respectively upper surface flaps 2c.
And the bottom flap 2b.

When the reinforcing cylinder frame 21 is arranged in this manner, the pressing force is supported by the peripheral wall 2a of the corrugated cardboard case 2 and the double wall of the cylinder frame 21, and the outer peripheral portion of the upper surface flap 2c is supported by a wide width. Therefore, the supporting strength is significantly improved.
Further, since the surface strength of the peripheral wall 2a of the cardboard case 2 is improved by the cylindrical frame 21, the liquid containers 1 may be stacked in multiple stages while the liquid containers 1 filled with the liquid are stored and transported. Also, the body can be prevented from bulging and sufficient strength can be secured.

[0029]

According to the first aspect of the present invention, when a thin-walled container installed in a corrugated cardboard case is filled with a liquid and then the mouth portion is covered with a hold-down cap and is pushed in, the holding force is applied to the mouth portion. The cap is easily supported by the corrugated cardboard case via the annular support member by the engagement of the engaging surface and the engaging collar of the annular support member, so that the cap can be easily closed at the mouth. Therefore, even though it is a liquid container containing a thin container inside the cardboard case, it can be closed with a hold-down cap, and since the mouth is exposed from the window hole formed in the cardboard case, the conventional filling equipment can be used as it is. It can be used to fill a liquid.

At the time of opening the lid, it is necessary to strongly press the central portion of the cap to deform the central portion by sinking and to disengage the outer peripheral engaging edge from the engaging surface in conjunction with this deformation. In this respect, according to the invention of claim 1, as described above, the cap includes the engagement surface of the mouth portion and the engagement flange of the annular support member, and the flange portion of the annular support member and the upper surface of the corrugated cardboard case. Since it is supported by the corrugated cardboard case through the annular support member due to the engagement with the cap, even if a strong pressing force is applied to the cap, the mouth portion that engages the cap does not sink inside, and therefore the cap By strongly pressing the central portion, the central portion of the cap is retracted and deformed inward by the supporting force, and the outer peripheral engaging edge of the cap can be disengaged from the engaging surface in conjunction with this deformation.

According to the second aspect of the present invention, since the flange portion of the annular support member is close to or in contact with the outer periphery of the corrugated cardboard case, the pressing force is directly transmitted from the flange portion of the annular support member to the peripheral wall of the corrugated cardboard case. Since it is received by the cap, it can be strongly obtained by the supporting force against the pressing force of the cap, and this strong supporting force ensures that the outer peripheral engaging edge of the cap is engaged with the engaging surface. The lid can be closed, or the outer peripheral engagement edge of the cap can be reliably separated from the engagement surface to open the lid.

According to the invention of claim 3, since the engaging brim of the annular supporting member is continuously formed in an approximately annular shape,
The engaging brim is not easily deformed by the pressing force of the cap, the pressing force can be stably supported, and the notch is formed at one position in the circumferential direction, so that the mouth portion is strongly pressed into the annular support member. The engaging collar can be engaged with the mating surface.

According to the invention of claim 4, since the reinforcing cylinder is fitted to the inner surface of the peripheral wall of the corrugated cardboard case, the supporting strength of the pressing force can be increased and the surface of the peripheral wall of the corrugated cardboard case can be improved by the cylinder frame. The strength is improved, and it is possible to prevent the body from bulging and secure sufficient strength even in the case of stacking and storing in multiple stages.

[Brief description of drawings]

FIG. 1 is an external perspective view of an embodiment of a liquid container of the present invention.

FIG. 2 is a vertical sectional view taken along the line AA of FIG.

FIG. 3 is an enlarged cross-sectional view of a main part of the same embodiment, in which (a) shows a cap closed state and (b) shows a cap opened state.

FIG. 4 is a plan view of the annular support member of the embodiment.

FIG. 5 is an exploded perspective view of the same embodiment.

FIG. 6 is a vertical cross-sectional view of another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Liquid container 2 Corrugated cardboard case 2a Peripheral wall 3 Thin container 5 Portion 9 Engagement surface 11 Cap 11 Cap 11b Outer peripheral engagement edge of cap 12 Window hole 13 Annular support member 15 Flange 16 Engagement collar 17 Cut 21 Tube frame

Claims (4)

[Claims] 1. A liquid container in which a synthetic resin thin-walled container is housed in a corrugated cardboard case, the thin-walled container is provided with an opening portion that can be opened and closed by a pressing cap, and an annular engaging portion is projected on the outer periphery of the opening portion. The lower side of the engaging portion is provided as an engaging surface, a window hole is formed in a portion of the upper surface of the cardboard case corresponding to the mouth, and a flange portion that engages with the upper surface of the cardboard case is formed on the outer periphery of the upper end. A liquid container characterized in that an annular supporting member having an engaging collar that engages with the engaging surface on the outer periphery of the mouth portion is provided on the inner periphery, and the annular supporting member is fitted into the window hole. 2. The liquid container according to claim 1, wherein the flange portion of the annular support member has an outer diameter such that a part of the outer peripheral portion of the annular support member is close to or in contact with the outer periphery of the corrugated cardboard case. 3. The liquid container according to claim 1, wherein the engagement brim of the annular support member is formed in an annular shape and a cut is formed at one position in the circumferential direction thereof. 4. The liquid container according to claim 1, wherein a reinforcing cylinder frame is fitted on the inner surface of the peripheral wall of the cardboard case.