JPS6219574Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a foldable box with an inner bag in which an inner bag is previously housed in a rectangular cylindrical body.

(Prior Art) When a paper or plastic film inner bag is filled with powder or granules, the bag has a bulging shape, so it is not easy to insert the bag into a square paper box or the like.

Therefore, in such cases, the inner bag is usually inserted into the paper box in advance, the inner bag is inflated, and then the powder or granular material is filled into the inner bag.

(Problems to be solved by the invention) However, this method inevitably increases the number of man-hours and working time in the packaging process.

The present invention allows the inner bag to be folded into the box during the box manufacturing process, and the entire bag can be folded flat before use, and when the box is opened for use, The present invention relates to a box with an inner bag in which the inner bag also opens automatically so that contents can be easily filled therein.

(Means for solving the problem) The box with inner bag of the present invention has a rectangular cylindrical body that can be folded by moving the front plate laterally in parallel with the rear plate, and the lower end of the rear plate. The base of a bottom plate which can be rotated upward is fixed to the bottom plate, and the bottom surface of the inner bag is fixed to the top surface of the bottom plate.

(Example) The explanation will be given below based on the drawings.

1 includes a rectangular cylindrical body portion 2 that can be folded by moving the front plate 2b laterally parallel to the rear plate 2a, a bottom plate 3 and a lid plate that can be rotated upward. 4, its bottom plate 3
The base ends 3a and 4a of the lid plate 4 are connected to the rear plate 2 of the body 2.
They are bent and fixed to the same lower end and upper end of a, respectively.

Note that when the bottom plate 3 is rotated horizontally and unfolded, the front edge or side edge of the bottom plate 3 is appropriately engaged with the front plate 2b or the lower end of the side plate of the body 2, and the bottom plate 3 is rotated downward from the horizontal direction. It is now impossible to rotate.

Appropriate window holes 2c are bored at key points in the lower part of the front plate 2b of the body 2, as required.

The bottom surface of an inner bag 5 made of paper or plastic film is adhered to the top surface of the bottom plate 3.

Although not shown in the drawings, when the bottom plate 3 is rotated horizontally and unfolded, the front edge or side edge of the bottom plate 3 is appropriately engaged with the front plate 2b or the lower end of the side plate of the body 2, and the bottom plate is opened. 3 should not be able to rotate downward from horizontal.

However, even if the front edge or side edge of the bottom plate 3 is not necessarily locked to the body 2, when the inner bag 5 is filled with contents, the inner bag 5 presses against the inner surface of the body 2 due to the pressure. The inner bag 5 is not lowered, and therefore,
It has been confirmed that the front part of the bottom plate 3 does not rotate downward and open.

Before using this paper box 1, as shown in FIG. It is stored flat by stretching it out and moving the front plate 2b laterally parallel to the rear plate 2a.

In use, the front plate 2b is rotated forward while remaining parallel to the rear plate 2a and pulled out, and the bottom plate 3 is unfolded horizontally. Then, as shown in FIG. 2, the inner bag 5 is also automatically expanded into a cylindrical shape.

In this state, if the granular material or powder material 6 is filled into the inner bag 5, the inner bag 5 will become as shown in FIG.
It swells to the same shape as paper box 1.

After filling, the upper end 5a of the inner bag 5 is appropriately sealed and the lid plate 4 is closed, thereby completing the packaging.

To take out the contents of the inner bag 5, open the lid plate 4 and tear the upper end 5a of the inner bag 5, or insert a knife or the like through the window hole 2c and tear the lower part of the inner bag 5. Drain the contents from.

As described above, according to the present invention, the inner bag is attached in a folded state during the manufacturing process of the box, and can be folded flat to the side, making it convenient for storage and transportation. In addition, when in use, when the folded box is opened into a cylindrical shape, the inner bag automatically expands and opens, making it especially convenient and convenient for packaging powder and granular materials. It is possible and convenient.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view of one embodiment of the present invention in the folded state, Fig. 2 is a longitudinal side view of the same in the unfolded state, and Fig. 3 is a partially cutaway slope view of the inner bag filled. be. 1...paper box, 2...body, 2a...rear plate, 2b
...Front plate, 2c...Window hole, 3...Bottom plate, 3a...
Base end, 4... Lid plate, 4a... Base end, 5... Inner bag,
5a...Top end.

Claims (1)

[Scope of utility model registration request] By moving the front plate laterally in parallel with the rear plate, the base of the bottom plate that can be rotated upward is fixed to the lower end of the rear plate in the rectangular cylindrical body that can be folded. A box with an inner bag that has the bottom of the inner bag fixed to the top of the bottom plate.