JPH0885571A - Liquid container - Google Patents

Abstract

PURPOSE: To enable an cap-closing of a liquid container having a thin wall placed in the inside of a corrugated cardboard case, using a force cap by a method wherein a support stepped part is provided in a position somewhat below the upper edge of the inner peripheral wall of the corrugated cardboard case, a support board having an engaging hole engageable with the engaging face of the outer periphery of a mouth part and its outer periphery is supported on the support stepped part. 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, since the resulting pressing force exerted on a support board 14 by engagement of the engaging face 9 of the mouth part 5 with the support board 14 is supported on the corrugated cardboard case 2 via a support stepped part 13, the engaging outer peripheral edge of the cap 11 is forced into engagement with the engaging face 9 by the support force resisting to the pressing force of the cap 11, 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 and can be filled with liquid by using the conventional filling equipment as it is.

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 oxidizing agent such as sodium hypochlorite, tin cans are corroded by these acidic chemicals, and therefore chemical resistant synthetic resin such as polyethylene is contained inside. A thin-walled container made of wood 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. Since the post-treatment takes a great deal of time and effort, post-treatment has not been collected by a collection company, and it has been extremely difficult to collect and dispose of it.

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 a liquid filling facility that closes with a formula cap, but the filling process is complicated, resulting in a large-scale complex facility, resulting in a significant increase in facility cost. 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 is represented by the reference numerals in the drawings. In the invention according to claim 1, the synthetic resin is provided in the corrugated cardboard case 2. In a liquid container 1 containing a thin container 3 made of metal, an opening 5 that can be opened / closed by a cap 11 of a press type is provided in the thin container 3 and an annular engaging portion 8 is provided on the outer periphery of the opening 5 so as to project. The lower surface side is used as the engagement surface 9, and the cardboard case 2
A support step portion 13 is provided on the inner surface of the peripheral wall 2a at a position slightly lower than the upper end thereof, and a support plate 14 having an engagement hole 15 that engages with the engagement surface 9 on the outer periphery of the mouth portion 5 is provided and its outer edge portion 14a is provided. A structure in which the support step portion 13 supports the support step portion 13 is adopted.

In the invention according to claim 2, a window hole 18 is formed in a portion of the corrugated cardboard case 2 corresponding to the mouth portion 5 of the thin container 3, and the mouth portion 5 is exposed. The configuration described in 1. is adopted.

Further, in the invention according to claim 3, the reinforcing cylinder frame 12 is fitted on the inner surface of the peripheral wall 2a of the corrugated cardboard case 2, and the upper edge of the cylinder frame 12 serves as the support step portion 13. The configuration described is adopted.

Further, in the invention according to claim 4, the side piece 14b is bent downward and integrally extended to the outer peripheral portion 14a of the support plate 14, and the side piece 14b is reinforced with the reinforcing cylinder 12 and the corrugated cardboard case. The structure according to claim 3 is adapted to be sandwiched between the two side walls 2a.

Further, in the invention according to claim 5, a step portion forming member 22 having an upper edge forming a support step portion 13 is adhered near the upper end of the inner surface of the peripheral wall 2a of the corrugated cardboard case 2. The configuration described in 1. is adopted.

Further, in the invention according to claim 6, the support plate 14 is constituted by a reinforced cardboard, and the structure according to claim 1 is adopted.

Further, in the invention according to claim 7, the support plate is provided with a keyhole-shaped or daruma-hole-shaped opening 17 having an engagement hole 15 and an insertion hole 16 capable of inserting the mouth portion 5 on the side thereof. 14
The structure described in claim 1 is formed.

The invention according to claim 8 is characterized in that the window frame 18 of the corrugated cardboard case 2 is fitted with an annular frame 19 made of synthetic resin for protecting the periphery thereof. To be adopted.

[0017]

According to the first aspect of the present invention, when the liquid is filled in the thin-walled container 3 housed in the corrugated cardboard case 2, the mouth portion 5 of the thin-walled container 3 is covered with the press-fitting cap 11 and pressed.
The pressing force is received by the support plate 14 through the engagement between the engagement surface 9 of the mouth portion 5 and the support plate 14, and is supported by the corrugated cardboard case 2 through the support step portion 13, so that the cap 11 is pushed. By the supporting force against the pressure, the outer peripheral engagement edge 1 of the cap 11
1a engages with the engaging surface 9 and can be closed by the cap 11. Therefore, even though the liquid container 1 has the thin container 3 inside the cardboard case 2, it can be closed by the press-fitting cap 11. The liquid can be filled using the conventional filling equipment as it is.

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 holds the engagement surface 9 of the mouth portion 5, the support plate 4 supporting the mouth portion 5, the support step portion 13 engaging the outer peripheral edge of the support plate 14 and the support step portion 13 as described above. Since it is supported by the corrugated cardboard case 2, even if a strong pressing force is applied to the cap 11, the mouth portion 5 that engages with the cap 11 does not sink inside, and thus the central portion 11a of the cap 11 is strongly pressed. As a result, the central portion 11a of the cap 11 is deformed inwardly by the supporting force,
The outer peripheral engagement edge 11b of the cap 11 can be disengaged from the engagement surface 9 in conjunction with this deformation.

According to the second aspect of the invention, since the mouth portion 5 is exposed through the window hole 18 formed in the corrugated cardboard case 2, it can be handled and filled in exactly the same way as in the case of a tin can. In some cases, cardboard case 2
Alternatively, the upper surface flap 2c may be closed after the upper surface flap 2c is opened and filled with the liquid from the mouth portion 5 and covered with the cap 11.

According to the third aspect of the present invention, since the reinforcing cylinder frame 12 is fitted to the inner surface of the peripheral wall 2a of the corrugated cardboard case 2 and the support step portion 13 is formed at the upper end edge thereof, the support having high support strength is provided. The step portion 13 can be easily formed and the reinforcing cylinder frame 1
2, the surface strength of the peripheral wall 2a of the cardboard case 2 is improved,
It is possible to prevent the body from bulging and secure sufficient strength even when the sheets are stacked and stored in multiple stages. In addition, if the bottom portion is continuously provided to the lower end of the reinforcing cylinder frame 12, the strength is further improved.

According to the fourth aspect of the present invention, the side piece 14b is bent downward and integrally extends on the outer peripheral portion 14a of the support plate 14, and the side piece 14b is provided on the side wall of the reinforcing cylinder frame 12 and the corrugated cardboard case 2. Since the support plate 14 is sandwiched between the support plate 14 and the outer peripheral portion 14a, the support plate 14 is supported not only by the outer peripheral portion 14a of the support step portion 13 but also by the side piece 14b extending from the support plate 14.
Is sandwiched between the reinforcing cylinder frame 12 and the corrugated cardboard case 2, so that the support plate 14 is not affected by external vibration or shock.
It can be strongly supported on the support step portion 13 without moving, and is further regulated by the side wall 14b integral with the support plate 14 to prevent occurrence of bulging of the corrugated board case 2 near the side wall 14b. Even if the corrugated cardboard cases 2 are stacked in multiple stages, it is possible to secure the strength capable of preventing the collapse of loads.

According to the fifth aspect of the invention, since the support step portion 13 is formed by the step portion forming member 22 adhered to the inner surface of the peripheral wall 2a of the corrugated cardboard case 2, the adhering step is performed in the manufacturing process of the corrugated cardboard case 2. Is added, but less material is required.

According to the invention of claim 6, the support plate 14
Since it is made of reinforced cardboard, it is inexpensive and the energy generated during incineration and disposal is smaller than that of a synthetic resin plate, and the incineration process can be performed easily.

According to the invention of claim 7, the support plate 14
Since the keyhole-shaped or dharma-hole-shaped opening 17 having the engagement hole 15 and the insertion hole 16 is formed in the insertion hole 16, the opening 5 is inserted into the insertion hole 16 and the support plate 14 is slid with respect to the opening 5. By doing so, the support plate 14 can be easily engaged with the engagement surface 9 of the mouth portion 5.

According to the eighth aspect of the present invention, the peripheral edge of the window hole 18 can be protected by fitting the annular frame 19 made of synthetic resin into the window hole 18 of the corrugated cardboard case 2, and the appearance of the appearance can be improved. Is good.

[0026]

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 edge is projected on the outer periphery of the lower end of a tubular tubular portion 6 and a cap of a pressing type is attached 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. An inner lid 1 made of synthetic resin is provided on the inner circumference of the tube mouth portion 6.
0 is fitted. Reference numeral 10a denotes a handle for removal, which is integrally connected to the inner side of the inner lid 10.

A reinforcing cylinder frame 12 made of cardboard or the like is fitted on the inner peripheral surface of the peripheral wall 2a of the cardboard case 2. The reinforcing cylinder frame 12 is formed to be slightly shorter than the height of the peripheral wall 2a, and a support step portion 13 is formed at the upper end of the peripheral wall 2a located slightly below the upper end of the peripheral wall 2a. In addition, a bottom portion may be connected to the lower end of the reinforcing cylinder frame 12, and the strength is further improved.

A support plate 14 made of hard corrugated board is disposed on the reinforcing cylinder frame 12, and an outer peripheral edge portion 14a thereof is engaged with and supported by the support step portion 13. The support plate 14 may have a flat plate shape as shown in FIG. 2 or FIG.
As shown in FIG. 5, the side piece 14 is attached to the outer peripheral edge 14 a of the support plate 14.
b may be bent downward and integrally extended, and the side piece 14b may be sandwiched between the reinforcing cylinder frame 12 and the side wall 2a of the cardboard case 2. Further, as shown in FIG. 4, the support plate 14 is formed with an engagement hole 15 which can be engaged with the engagement surface 9 on the outer periphery of the mouth 5, and a side portion of the engagement hole 15 which is continuous with the engagement hole 15. A Dharma-hole-shaped opening 17 having a large-diameter insertion hole 16 through which the mouth portion 5 can be inserted is formed, and after the mouth portion 5 is inserted into the insertion hole 16, the support plate 14 is mutually attached to the mouth portion 5. By sliding, the periphery of the engagement hole 15 of the support plate 14 can be easily engaged with the engagement surface 9. If the opening 17 forming the engagement hole 15 is formed in a keyhole shape instead of a dharma shape, the support plate 14 can be slid with respect to the mouth portion 5 more smoothly.

A window hole 18 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 frame 19 made of synthetic resin, which is dish-shaped and has a hole through which the mouth 5 penetrates is formed in the center of the window hole 18, is fitted to protect the peripheral edge of the window hole 18 and to give the appearance. I am doing well.

In order to form the liquid container 1 with the above structure, as shown in FIG. 5, the cardboard case 2 is assembled with the upper surface flap 2c open, and the reinforcing cylinder frame 12 is fitted therein. In addition, the support plate 14 is superposed on the upper surface of the thin-walled container 3 and the engaging hole 1 of the support plate 14 is formed in the opening 5 of the support plate 14.
5, the thin container 3 and the support plate 14 are inserted into the corrugated cardboard case 2 so that the outer peripheral edge 14a of the support plate 14 is engaged with the support step portion 13, and finally the upper surface flap 2c. By closing, the thin container 3 is installed inside the cardboard case 2 and the liquid container 1 in which the mouth 5 is exposed is formed. The support plate 14 has an outer peripheral edge 1
4a is integrally formed with a downward side piece 14b.
The outer peripheral portion 14a is not only supported by the support step portion 13, but also the side piece 14b extended to the support plate 14 is provided on the reinforcing cylinder frame 12.
Since it is sandwiched between the cardboard case 2 and the cardboard case 2, the support plate 1
4 can be strongly supported on the supporting step portion 13 without moving even if it receives a vibration or an impact from the outside, and is further regulated by the side wall 14b integral with the supporting plate 14, so that the side wall 1
It prevents the occurrence of bulging of the cardboard case 2 near 4b,
Even if a large number of corrugated cardboard cases 2 are stacked in a multi-tiered manner, it is possible to secure the strength capable of preventing the occurrence of load collapse.
Furthermore, the inner lid 10 and the cap 11 are fitted after the liquid is filled.

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 press-fitting cap 11 is put on the inner lid 10 and pressed down, the pressing force is generated through the engagement between the engagement surface 9 of the mouth portion 5 and the support plate 14. The cardboard case 2 is received by the support plate 14, and the peripheral edge 14 a of the support plate 14 is interposed via the support step portion 13 at the upper end of the reinforcing tube frame 12.
Are supported by the outer peripheral engagement edge 11 of the cap 11 by these supporting forces against the pressing force of the cap 11.
Due to its elastic deformation, b can be engaged with the engaging surface 9 of the mouth portion 5 to close the lid.

The liquid container 1 filled with the liquid is stored / transported and delivered to the customer. While the liquid containers 1 may be stacked in the meantime, the peripheral wall 2a of the corrugated cardboard case 2 may be stacked.
Since the reinforcing cylinder frame 12 is fitted to the inner peripheral surface, the cylinder frame 12
Thus, the surface strength of the peripheral wall 2a of the corrugated cardboard case 2 is improved, and it is possible to prevent the body from bulging even when stacked in multiple stages and to secure sufficient strength.

After that, when the liquid is taken out from the liquid container 1 by 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 is interlocked with this deformation. Although it is necessary to disengage 11a from the engagement surface 9, according to the present invention, the cap 11
Is supported by the engagement surface 9 of the mouth portion 5, the support plate 4 that supports the mouth portion 5, the support step portion 13 that engages the outer peripheral edge of the support plate 14, and the corrugated cardboard case 2 that holds the support step portion 13 as described above. Therefore, even if a strong pressing force is applied to the cap 11, the mouth portion 5 that engages with the cap 11 does not sink into the inside. Therefore, as shown in FIG.
When the central portion 11a of the cap 11 is strongly pressed, the central portion 11a of the cap 11 is deformed by the support force, and the outer peripheral engagement edge 1 of the cap 11 is interlocked with this deformation.
The liquid can be extracted by separating 1b from the engaging surface 9 and opening the lid, and then removing the inner lid 10.

Thus, according to this embodiment, the mouth 5 is exposed from the window hole 18 formed in the corrugated cardboard case 2 even though the corrugated cardboard case 2 is the liquid container 1 containing the thin container 3 therein. It can be handled and filled with liquid in exactly the same way as a tin can, then the cap 11
Since the lid can be closed with, the liquid can be filled using the conventional filling equipment as it is.

Further, since the support plate 14 is made of reinforced cardboard, the required strength can be obtained, the cost is low, and the energy generated at the time of incineration disposal is smaller than that of the synthetic resin plate, and the incineration process can be easily performed. Therefore, it has an advantage over other materials. Further, since the reinforcing tubular frame 12 is fitted to the peripheral wall 2a of the cardboard case 2 and the supporting step portion 13 is formed at the upper edge thereof, the supporting step portion 13 having high supporting strength can be easily formed. Further, the peripheral edge of the window hole 18 can be protected by fitting the annular frame 19 made of synthetic resin into the window hole 18 of the cardboard case 2.

In the above description, the example in which the mouth portion 5 is exposed from the window hole 18 with the upper surface flap 2c of the corrugated cardboard case 2 closed is shown, but with the upper surface flap 2c of the corrugated cardboard case 2 opened. The upper surface flap 2c may be closed after filling the liquid from the mouth portion 5 and covering with the cap 11.

In the above embodiment, the cardboard case 2 is used.
The reinforcing cylindrical frame 12 was fitted to the inner surface of the peripheral wall 2a of the above, and the support step portion 13 was formed at the upper edge of the cylindrical frame 12, but as shown in FIG. A step forming member 22 whose upper edge forms the supporting step 13 may be adhered to the vicinity thereof. In this way, the support step portion 1 is supported by the step portion forming member 22.
3 is formed, an adhesive process is added in the manufacturing process of the corrugated board case 2, but the material is small.

Further, in the above-described embodiment, the Dharma hole-shaped or keyhole-shaped opening 17 having the engagement hole 15 and the insertion hole 16 capable of inserting the side opening 5 is formed in the support plate 14. As shown in FIG. 7, cuts 25 are formed around the circular engagement hole 15.
Can be formed, and the mouth portion 5 can be elastically press-fitted into the engagement hole 15 for engagement. In this case, the engaging hole 15 has a mouth portion 5
It is not easy to press in by hand, but
The support plate 14 can be easily processed.

Although not shown, the support plate 14 may be integrally connected to the reinforcing cylinder frame 12. Further, instead of the reinforcing cylinder frame 12, a support frame which is L-shaped in plan view and extends to the bottom is used, and a support plate 14 provided integrally with the support frame is superposed on a part of the peripheral wall 2a of the cardboard case 2. Alternatively, the support frame may be fixed to the side wall 2a by adhesion or the like without extending to the bottom.

[0042]

According to the invention of claim 1, when a thin-walled container housed in a corrugated cardboard case is filled with a liquid and then the mouth of the container is covered and held down, the pressing force is applied to the mouth. It is received by the support plate through the engagement of the engagement surface and the support plate, and is supported by the corrugated cardboard case through the support step portion, so that the cap is easily closed at the mouth portion by these sufficient support forces. Therefore, even though it is a liquid container in which a thin-walled container is housed in a corrugated cardboard case, it can be closed with a pressing cap, and the liquid can be filled using the conventional filling equipment as it is.

Further, when the lid is opened, it is necessary to strongly press the central part of the cap to deform the central part by sinking and to disengage the outer peripheral engaging edge from the engaging surface in conjunction with this deformation. However, according to the invention of claim 1, the cap has the engagement surface of the mouth portion, the support plate that supports the engagement surface, the support step portion that engages the outer peripheral edge of the support plate, and Since it is supported by the corrugated cardboard case that holds the support step, the mouth that engages the cap does not sink inside even if a strong pressing force is applied to the cap, so the center of the cap should be pressed strongly. By the supporting force, the central portion of the cap is retracted and deformed inward, and the outer peripheral engagement edge of the cap can be disengaged from the engagement surface in conjunction with this deformation.

According to the second aspect of the invention, since the mouth portion is exposed through the window hole formed in the corrugated cardboard case, it can be handled and filled in exactly the same way as in the tin can.

According to the third aspect of the present invention, since the reinforcing tubular frame is fitted on the inner surface of the peripheral wall of the corrugated cardboard case and the supporting step portion is formed at the upper edge thereof, the supporting step portion having high supporting strength can be easily formed. In addition, the reinforcing cylinder frame improves the surface strength of the peripheral side wall of the corrugated cardboard case, and can prevent the body from bulging even when they are stacked and stored in multiple stages, and can secure sufficient strength.

According to the fourth aspect of the present invention, the side piece is bent downward and integrally extended on the outer peripheral portion of the support plate, and the side piece is sandwiched between the reinforcing cylinder frame and the side wall of the corrugated cardboard case. Thus, not only is the outer peripheral portion of the support plate supported by the support stepped portion, but also the side piece extending on the support plate is sandwiched between the reinforcing cylinder frame and the corrugated cardboard case. Can be strongly supported on the support step without moving even if it receives vibration or shock from the outside, and is regulated by the side wall integrated with the support plate, and the corrugated case of the cardboard case near the side wall expands. The strength of the cardboard case can be prevented and the strength of the cardboard case can be prevented even if multiple cardboard cases are stacked in multiple stages. Even if the stepped portion is curved, the bearing capacity remains unchanged That.

According to the fifth aspect of the present invention, since the supporting step is formed by the step forming member adhered to the inner surface of the peripheral wall of the corrugated board case, the adhering step is added in the manufacturing process of the corrugated board case. It requires less material.

According to the invention of claim 6, since the support plate is made of the reinforced cardboard, it is inexpensive and the energy generated at the time of incineration disposal is smaller than that of the synthetic resin plate, and the incineration process can be performed easily. .

According to the invention of claim 7, a keyhole-shaped or daruma-hole-shaped opening having an engagement hole and a large-diameter insertion hole is formed in the support plate, so that the mouth portion is inserted into the insertion hole. By sliding the support plate with respect to the mouth portion, the support plate can be easily engaged with the engagement surface of the mouth portion.

According to the invention of claim 8, the peripheral edge of the window hole can be protected by fitting the annular frame made of synthetic resin into the window hole of the corrugated cardboard case.

[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 cross-sectional view taken along the line AA of FIG. 1 in a state in which an upper surface flap of a corrugated cardboard case is opened in the example.

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 a support plate of the same embodiment.

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

FIG. 6 is a vertical sectional view showing a supporting step portion in another embodiment of the present invention.

FIG. 7 is a partial plan view of a support plate according to 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 Mouth portion 9 Engaging surface 11 Cap 11b Outer peripheral engaging edge of cap 12 Reinforcing cylinder frame 13 Supporting step portion 14 Support plate 14a Outer peripheral edge of support plate 14b Side piece of support plate 15 Engagement hole 16 Insertion hole 17 Opening 18 Window hole 19 Annular frame 22 Step forming member

Claims (8)

[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 bottom surface of the corrugated cardboard case is provided as an engagement surface, a support step portion is provided on the inner surface of the peripheral wall of the corrugated board case slightly below the upper end of the corrugated cardboard case, and an engagement hole for engaging the engagement surface on the outer periphery of the mouth portion is provided. A liquid container characterized in that a plate is provided and an outer peripheral portion of the plate is supported by a supporting step portion. 2. The liquid container according to claim 1, wherein a window hole is formed in a portion of the cardboard case corresponding to the mouth of the thin-walled container, and the mouth is exposed. 3. The liquid container according to claim 1, wherein a reinforcing cylinder is fitted on the inner surface of the peripheral wall of the cardboard case, and the upper edge of the cylinder serves as a support step. 4. A side piece is bent downward and integrally extends on an outer peripheral portion of the support plate, and the side piece is sandwiched between a reinforcing cylinder frame and a side wall of a corrugated cardboard case. Liquid container. 5. The liquid container according to claim 1, wherein a step forming member having an upper edge forming a supporting step is adhered to the inner wall of the peripheral wall of the cardboard case in the vicinity of the upper end thereof. 6. The liquid container according to claim 1, wherein the support plate is made of reinforced cardboard. 7. The liquid container according to claim 1, wherein the support plate is formed with a keyhole-shaped or Dharma-hole-shaped opening having an engagement hole and an insertion hole through which a mouth portion of a side portion thereof can be inserted. . 8. The liquid container according to claim 2, wherein an annular frame made of synthetic resin for protecting the peripheral edge of the cardboard case is fitted in the window hole of the cardboard case.