JP2002145322A - Box-shaped container with inner bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a stress concentration from occurring on a fold of an inner bag due to a vibration during transportation and to prevent a pin hole from occurring on the fold due to such a stress concentration in a box-shaped container with an inner bag comprising the fold formed in the inner bag which is received in a carton and filled with a fluid while a lower end of the inner bag is kept floating from a bottom of the carton. SOLUTION: A cushion 7 is inserted between the inner bag 2 filled with a fluid and the bottom in the carton 1 receiving the bag 2, and the cushion 7 is used to support a lower end of the inner bag 2. Thus even if the box-shaped container with the inner bag having the bag 2 filled with the fluid vibrates during transportation, a stress concentration to the fold 5 of the inner bag 2 does not occur, thereby preventing a pin hole from occurring on the fold 5, which is caused by such a stress concentration.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a box-shaped container with an inner bag for storing a fluid such as ink.

[0002]

2. Description of the Related Art Conventionally, as a container for storing a fluid such as ink, an inner bag made of a plastic film having high flexibility and high rigidity is housed in a carton made of hard paper which is hardly deformed. A box-shaped container (back-in-carton container) with an inner bag having a structure is known.

A conventional example of such a box-shaped container with an inner bag will be described with reference to FIGS. FIG. 2 is a perspective view showing the structure of a box-shaped container with an inner bag, and FIGS. 3 and 4 are longitudinal front views thereof.

[0004] The carton 1 is formed in a rectangular parallelepiped shape, and an inner bag 2 is housed therein. The inner bag 2 is provided with a spout 3 used for injecting a fluid stored in the inner bag 2 and for discharging the stored fluid. The spout 3 is provided in the carton 1. And a cap 4 is detachably attached to the spout 3.

[0005] The inner bag 2 is attached to the inner peripheral surface of the carton 1 in a substantially half area (the area shown by hatching in FIG. 3) on the upper side of the side where the spout 3 is provided, and the remaining lower side is roughly formed. Half area is not pasted.

FIG. 3 is a sectional view of the inner bag 2 when the inner bag 2 is filled with a stencil printing ink as a fluid. . First, before filling with ink, the air in the inner bag 2 is sucked from the spout 3 using a suction pump. Due to this suction, the inner bag 2 is bent toward the spout 3 so as to be bent from the boundary between the region to be attached to the carton 1 and the non-applied region, and finally, as shown in “State A”, The inner peripheral surface of the non-sticking area in the inner bag 2 and the inner peripheral surface of the sticking area in the inner bag 2 are in a state of being bonded. After the inner bag 2 shows the "state A", the suction of the air from the inside of the inner bag 2 is terminated, and the filling of the ink from the spout 3 is started. With the filling of the ink, the inner bag 2 becomes “state A”
Then, the state gradually expands to "state B", "state C", and "state D", and when the state becomes "state D", the operation of filling the inner bag 2 with ink is completed.

FIG. 4 shows a box-shaped container with an inner bag in which the cap 4 is attached to the spout 3 after the filling of the ink into the inner bag 2 is completed, in which the carton 1 and the inner bag 2 are shown in cross section. Things. The inner bag 2 has a folding part 5 at a part which is a boundary between a part to be attached to the inner peripheral surface of the carton 1 and a non-part to be attached.
Is formed in an annular shape, and the lower end of the inner bag 2 is maintained in a state of being lifted from the bottom of the carton 1.

Here, the reason why the folded portion 5 is formed in the inner bag 2 and the reason why the lower end portion of the inner bag 2 filled with ink is maintained in a state of floating from the bottom portion of the carton 1 will be described in detail. explain.

When the ink filled in the inner bag 2 is full, the inner bag 2 is removed when the cap 4 is removed from the spout 3.
An accident in which the ink inside overflows from the spout 3 easily occurs. Therefore, to prevent such accidents,
The volume of the inner bag 2 is set to be larger than the amount of ink to be filled. For this reason, the inner bag 2 gradually changes from “State A” to “State D” with the filling of the inner bag 2 with the ink, and the filling of the inner bag 2 with the ink is completed. When the state D "is reached, the folded portion 5 is formed in the inner bag 2.
Further, the height of the carton 1 is set such that a gap of a predetermined size is formed between the lower end of the inner bag 2 and the bottom of the carton 1 when the filling of the inner bag 2 with the ink is completed. .

The reason why the height of the carton 1 is set so that the lower end of the inner bag 2 does not come into contact with the bottom of the carton 1 when the filling of the inner bag 2 with ink is completed is as follows. If the lower end of the inner bag 2 hits the bottom of the carton 1 during filling, the inner bag 2 becomes wrinkled, and the swelling of the inner bag 2 caused by filling with ink is hindered. This is because a case occurs where the amount of ink cannot be filled.

Further, since the inner bag 2 is formed of a material having high rigidity, after the filling of the inner bag 2 with the ink is completed and the inner bag 2 is in the "state D", Even if vibrations or the like are transmitted to 2, the folded portion 5 does not extend, and the folded portion 5 does not extend and the lower end of the inner bag 2 does not contact the bottom surface of the carton 1.

A box-shaped container with an inner bag filled with ink is
Transport, storage, and the like are performed in a state shown in FIG. 4 (a state in which the lower end of the inner bag 2 filled with ink is raised from the bottom of the carton 1).

[0013]

When a box-shaped container with an inner bag filled with ink is transported in the state shown in FIG. 4, the inner bag formed of a highly rigid material is caused by vibration during the transportation. Stress concentration occurs in the folded portion 5 of the second. Due to such stress concentration, small cuts (pinholes) are likely to occur in the folded portion 5.

When a pinhole is formed in the folded portion 5 of the inner bag 2, ink leaks from the pinhole into the carton 1, and further, the ink leaks to the outside of the carton 1 to cause the box with the inner bag to leak. In some cases, the stencil printing machine on which the mold container is set is soiled.

When a pinhole is formed in the folded portion 5 of the inner bag 2, when the box-shaped container with the inner bag is set in a stencil printing machine and the ink in the inner bag 2 is sucked by the ink pump, In some cases, air may flow into the inner bag 2 from the pinhole, and it may not be possible to suck ink from the inner bag 2.

An object of the present invention is to form a folded portion in an inner bag that is housed in a carton and is filled with a fluid, and that the lower end portion of the inner bag is kept floating above the bottom of the carton. Prevents stress concentration at the folded part of the inner bag due to vibration during transportation in a box type container with an inner bag, and prevents pinholes at the folded part due to such stress concentration It is to be.

[0017]

According to the first aspect of the present invention,
A carton and an inner bag formed of a highly rigid material having flexibility and housed in the carton, and a spout communicating with the inner bag penetrates one surface of an upper end side of the carton. Provided, approximately half of the upper side of the inner bag on which the spout is provided is affixed to the inner peripheral surface of the carton, and approximately half of the remaining lower side is not affixed. A folded portion is formed at a portion where the filled inner bag is to be bonded to the inner peripheral surface of the carton and a non-adhered portion, and a lower end portion of the inner bag is a bottom portion of the carton. In a box-shaped container with an inner bag that is maintained in a floating state, a buffer that is inserted between the inner bag filled with fluid and the bottom of the carton to support the lower end of the inner bag is provided. Provided.

Therefore, a buffer is inserted into the bottom of the carton and the lower end of the inner bag filled with the fluid is supported by the buffer, so that the inner bag filled with the fluid is filled in the inner bag. Even if the box-shaped container vibrates during transportation, the vibration prevents stress concentration from occurring in the folded portion of the inner bag, and pinholes occur in the folded portion due to such stress concentration. Is prevented.

According to a second aspect of the present invention, in the box-shaped container with the inner bag according to the first aspect, an insertion opening for inserting the buffer is provided on the bottom side of the carton.

Therefore, the buffer can be inserted into the bottom of the carton by filling the inner bag with the fluid and then opening the insertion opening.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIG. 2 to 4 are denoted by the same reference numerals, and description thereof will be omitted.

The basic structure of this embodiment is the same as that shown in FIGS. 2 to 4 described as a conventional example. That is, a flexible plastic film inner bag 2 is placed in a carton 1 formed of a hard paper that is hardly deformed in a rectangular parallelepiped shape.
And a spout 3 communicating with the inner bag 2 is provided through one surface of the upper end side of the carton 1. Inner bag 2
The upper half of the side where the spout 3 is provided (the hatched area in FIG. 3) is attached to the inner peripheral surface of the carton 1, and the remaining lower half of the lower half is attached. Not been.

Therefore, when the inner bag 2 is filled with the stencil printing ink, which is a fluid, the state of the change of the inner bag 2 is the same as that shown in FIG. That is, by suctioning the air in the inner bag 2 from the spout 3 using a suction pump before filling the ink, the inner bag 2 is moved from the boundary between the region to be attached to the carton 1 and the non-application region. It bends toward the spout 3 so as to be bent, and becomes “state A”. When the filling of the ink is started from the state of “state A”,
The inner bag 2 gradually expands to “state B”, “state C”, and “state D”, and when the state becomes “state D”, the operation of filling the inner bag 2 with ink is completed.

When the state becomes "D" and the filling of the ink into the inner bag 2 is completed, the inner bag 2 has a boundary between the portion to be attached to the inner peripheral surface of the carton 1 and the non-attached portion. The folded-in portion 5 is formed in a circular shape at the portion where the inner bag 2 is formed, and the lower end of the inner bag 2 is maintained in a state of being lifted from the bottom portion of the carton 1.

The bottom of the carton 1 is provided with four flaps (not shown), which can be freely opened as required, and an adhesive tape can be attached in an overlapping state, or An insertion opening 6 that is closed by fitting the flaps is formed.

Then, as shown in FIG. 4, after the filling of the inner bag 2 with the ink is completed, the insertion opening 6 is opened, whereby the inner bag 2 filled with the ink and the bottom of the carton 1 are opened. And the buffer 7 is inserted between them. After the buffer 7 is inserted, the insertion opening 6 is closed, and the lower end of the inner bag 2 is supported by the buffer 7.

The buffer 7 is made of a material having a small specific gravity, such as corrugated cardboard, plastics, or styrene foam, and is formed to be lightweight. The shape of the buffer 7 is such that it can support the entire lower end portion of the inner bag 2 substantially uniformly, for example, a rectangular parallelepiped shape in which the mounting surface on the bottom portion of the carton 1 has substantially the same shape as the bottom shape of the carton 1 Is formed.

In such a configuration, after the filling of the predetermined amount of ink into the inner bag 2 is completed, the insertion opening 6 is opened, and the buffer 7 is inserted into the bottom of the carton 1. The insertion opening 6 is closed.

By inserting the buffer 7 into the bottom of the carton 1, the lower end of the inner bag 2 filled with ink is supported by the buffer 7. For this reason, even if vibration occurs when transporting the box-shaped container with the inner bag filled with ink in the inner bag 2, stress concentration does not occur in the folded portion 5 of the inner bag 2, and such The occurrence of pinholes in the folded portion 5 due to stress concentration is prevented.

Then, various inconveniences caused by the occurrence of pinholes in the folded portion 5 of the inner bag 2, for example, ink leaked from the pinholes leaks into the carton 1, and furthermore, the outside of the carton 1 Leaking into the stencil printing apparatus on which the box-shaped container with the inner bag is set, or trying to suck the ink in the inner bag 2 by setting the box-shaped container with the inner bag on the stencil printing device. When
It is possible to prevent the air from flowing into the inner bag 2 from the pinhole and making it impossible to suck the ink from the inside of the inner bag 2.

[0031]

According to the box type container with an inner bag according to the first aspect of the present invention, a buffer is inserted into the bottom of the carton and the lower end of the inner bag filled with the fluid by the buffer. By supporting the inner bag, even if the box-shaped container with the inner bag filled with the fluid inside the inner bag vibrates during transportation, it is possible to prevent the concentration of stress at the folded portion of the inner bag due to the vibration. It is possible to prevent the occurrence of pinholes in the folded portion due to such stress concentration.

According to a second aspect of the present invention, in the box-shaped container with the inner bag according to the first aspect,
Since the insertion opening for inserting the buffer is provided, the insertion opening is opened after the filling of the fluid in the inner bag is completed, so that the buffer to the bottom side in the carton is opened. Insertion can be easily performed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing a box-shaped container with an inner bag according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the structure of a conventional box-shaped container with an inner bag.

FIG. 3 is a longitudinal sectional front view thereof.

FIG. 4 is a longitudinal sectional front view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Carton 2 Inner bag 3 Spout 5 Insertion part 6 Insertion opening part 7 Buffer

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E060 AA03 BB07 BC04 CC12 CC19 CC61 CC62 CF06 DA30 EA03 EA14 3E066 AA01 CA01 CA04 DA01 HA01 JA01 MA09 NA60 3E067 AA03 AB96 BA06C BA12B BB01C EB32 EE45 FA04 FB16 GD03 GD10

Claims (2)

[Claims] 1. A carton and an inner bag formed of a flexible and highly rigid material and housed in the carton, and a spout communicating with the inner bag is provided at an upper end side of the carton. A substantially half of the upper side of the inner bag on which the spout is provided is attached to the inner peripheral surface of the carton, and the remaining substantially half of the lower side is attached. Instead, a folded portion is formed at a portion that is a boundary between a portion where the inner bag filled with the fluid is stuck to an inner peripheral surface of the carton and a non-stuck portion, and a lower end portion of the inner bag is formed. In a box-shaped container with an inner bag maintained in a state of being lifted from a bottom portion of the carton, a lower end portion of the inner bag inserted between the inner bag filled with a fluid and a bottom portion of the carton. Box with inner bag characterized by providing a buffer that supports Container. 2. The box-shaped container with an inner bag according to claim 1, wherein an insertion opening for inserting the buffer is provided on a bottom side of the carton.