JPS621087Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention mainly relates to a liquid bag used as a liquid container in combination with a cardboard box, a wooden box, a box pallet, etc., and particularly to a liquid bag having a unique discharge port structure.

Conventionally, the outlet of this type of liquid bag has generally been formed by attaching a molded part to the bag body, such as a stopper or a cap, which can be opened and closed by heat-sealing means. Although it is possible to install such an outlet when the bag is made of polyvinyl chloride resin, it is extremely difficult to install it when the bag is made of polyethylene resin. .
Moreover, the structure is relatively complicated, and opening operation when discharging liquid is by no means easy.

In view of the above, the present invention provides a liquid bag that has a simple structure, can be easily attached to a bag body made of polyethylene resin, and has a discharge port structure that is easy to open and close, especially to open. One end of the flat bag is attached to the bag body so that it can be opened, and two flexible plate-like bodies are installed so as to correspond to the front and back sides of the cylindrical body. This device is characterized in that the discharge port formed by the cylinder is opened by bending and bulging both plate-like bodies outward.

Next, embodiments of the present invention will be described based on the drawings.
1 is a cylindrical bag made of a single or multi-layered synthetic resin film or sheet such as polyethylene resin, a sheet of kraft paper laminated with polyethylene resin on the inner surface, or other so-called waterproof material that does not permeate water. , the opposing side wall portions are gusseted inwardly by longitudinal folds 2,2. In addition, the bottom 3 has a square bottom shape, with the lower ends of the front and back extensions joined 4 by heat-sealing means, etc., and both edges thereof joined 5, 5 to the lower edges of the gusset-shaped side wall portions by heat-sealing means, etc. has been done.

a side joint portion 5 at the bottom 3 of the bag 1;
A flat cylindrical body 6 made of polyethylene resin film or other flexible waterproof material is placed in the appropriate position of 5.
It is inserted so that one end thereof is opened inside the bag body, and is integrally joined to the bottom part 3 by heat-sealing means or the like except for between the front and back films 6a and 6b, and this serves as a discharge port. The flat cylindrical body 6 may be one in which the front and back films are polymerized and joined at both ends by heat fusion means, or a cylindrical film formed into a flat shape by heat fusion at both ends. Although it is possible to use a film in which the front and back films 6a and 6b are in a polymerized state, in particular, in the illustrated embodiment, the front and back films 6a and 6b each have a two-layer structure.

The cylindrical body 6 is provided with two plate-like bodies 7a and 7b made of synthetic resin plates, metal plates, etc., which are flexible and can be bent by applying a certain amount of force.
are installed so that the front and back sides correspond to each other, and the cylindrical body 6 can be opened by bending and expanding both the plate-like bodies 7a and 7b outward.

In the embodiments shown in FIGS. 1 to 4, the two plate-shaped bodies 7a and 7b are installed by utilizing the fact that the front and back films 6a and 6b of the cylinder 6 each have a two-layer structure. The two plate-like bodies 7a and 7b are interposed between the two layers of the front and back films 6a and 6b, respectively, and in addition, the two plate-like bodies 7a and 7b are overlapped as shown in FIG. Alternatively, as shown in FIG. 6, the plate-shaped bodies 7a and 7b may be attached to the outer surfaces of the front and back films 6a and 6b of the cylinder 6 by means of attachment means. is also possible. In particular, as mentioned above, the plate-shaped bodies 7a, 7
It is preferable to interpose b between the layers of the two-layer film in terms of the liquid discharge effect when the cylinder is opened and the stability of the installed state.

In addition, in the embodiments shown in FIGS. 1 to 6, as means for configuring the two plate-like bodies 7a and 7b to be bendable,
One or more bending aids are formed approximately at the center of each of the plate-like bodies 7a and 7b in the width direction of the cylinder, and the bending aids are formed by strongly gripping the bending aids from both sides. It is provided so that it can be bent into a substantially rectangular shape from the point of the means, so that the discharge port formed by the cylindrical body 6 can be opened. As the bending aid means for the plate-shaped bodies 7a, 7b, in addition to the cut 8 formed by leaving both ends as shown in the illustrated embodiment, it is possible to use an interrupted linear cut, a groove, or other hinge-like fold. It is possible to implement various structures that make it easier to bend both the plate-like bodies 7a and 7b, such as the line of sight. In the case of the cut 8, it is desirable to form circular holes 9, 9 at both ends of the cut 8 to prevent tearing and damage from the cut 8.

Furthermore, in addition to the above, by using elastic plates such as spring plates as the plate-like bodies 7a and 7b, they can be provided so as to be bendable in a curved shape as shown in FIG. 7 by utilizing the elasticity of the blank plates.

In addition, in any of the above embodiments, the plate-shaped body 7
It is preferable to install a and 7b on the base side of the cylinder 6 as shown in the above figure, but the opening caused by the bending is too close to the joint to the bag body 1. This is not preferable since there is a risk of peeling or damage of the bonded portion due to the action or the like.

Further, the width and length of the cylinder body 6 can be set as appropriate depending on the capacity and discharge amount of the bag body 1, but the plate-like body 7
Preferably, a and 7b are set to have the same or slightly smaller width than the cylindrical body 6 and a length of about 1/2 to 1/4 of the length of the cylindrical body 6. Furthermore, although it is possible to leave the tip of the cylinder 6 open, it is possible to seal the tip 10 as shown in the figure and remove the sealed portion 1 during the discharge operation.
It is preferable to perform this by cutting out 0 because it can be reliably sealed until the discharge operation.

Furthermore, the mounting position of the cylindrical body 6 having the above structure is not limited to the illustrated embodiment, but may be placed near the bottom 3 where there is no problem in discharging the stored liquid and using it in combination with an outer box such as a cardboard box. It can be installed and carried out.

11 in the figure is a flat cylindrical body that serves as an injection port and is made of a flexible waterproof material. One end of the body is open to the outside of the bag body 1 at the upper end of the bag body 1, and the other end is inside the bag body 1. The bag is inserted so as to be open on one side, and is sealed 12 with the upper end of the bag by heat-sealing means or the like, except for the front and back sides.

The present invention is constructed as described above, and is used as a container for liquids in combination with an outer box 20 such as a cardboard box that reinforces the outside, as shown in Fig. 8, for liquid transportation. The cylindrical body 6 serving as an outlet is folded as shown in the figure, and an outlet 21 for taking out the cylindrical body 6 is formed in the lower part of the outer box 20. When discharging the stored liquid, the cylindrical body 6 is pulled out from the outlet 21, and
If the tip end is sealed 10, the sealed portion 10 is removed and the plate-like bodies 7a, 7 inside the cylinder 6 are removed.
It is sufficient to bend and bulge outward by strongly grasping the plate-shaped members 7a and 7b from both sides, and the plate-shaped members 7a and 7b can be bent or bulged outward by bending aids such as cuts provided therein or by the elasticity of the material, as shown in FIG. (Fig. 10) or as shown in Fig. 7, the flat cylinder 6 expands into a pipe shape due to this bending and swelling, and the discharge port of the cylinder 6 opens, and the liquid is discharged. It is done. At this time, for example, use a clamping and holding tool 30 having hook-shaped locking parts 31, 31 at both ends as shown in FIG. 9, or a U-shaped clamping and holding tool 30' as shown in FIG. By fitting the bent plate-shaped bodies 7a, 7b from the outside of the cylindrical body 6, the stiff plate-shaped bodies 7a, 7b can be bent into a substantially rectangular or curved shape by resisting the elastic restoring force of the material. It can be easily and reliably held in a bent state. Furthermore, when closing the discharge port during discharge when liquid remains inside the bag body 1, the bending of the plate bodies 7a and 7b is released to restore the cylindrical body 6 to a flat shape, and this shaped body 7a,
7b can be folded in the vicinity of both ends, and the front and back films of the cylindrical body 6 made of a waterproof material are brought into close contact with each other at the folded portions, so that a closed state can be easily and reliably obtained.

In this way, in the liquid bag of the present invention, one end of the flat cylinder 6 is attached to the cylinder 1 so as to be openable, and a part of the cylinder 6 has a flexible two-plate body 7a, 7b
The discharge port is opened by the cylindrical body 6 by bending and bulging both the plate-like bodies 7a and 7b outward, and the opening/closing operation, especially the opening operation, is performed on the plate-like body. It is easy to carry out with a one-touch operation by simply gripping 7a and 7b firmly from both sides, and the open state can be reliably maintained using a simply structured clamping tool, etc., and the liquid can be drained well. The closed state can be maintained simply by folding the container appropriately. Moreover, in the case of the present invention, the discharge port structure is easy to manufacture with a simple configuration in which the flat cylinder 6 with the plate-shaped bodies 7a and 7b inserted therein is attached to the bag body 1, and the discharge port structure is easy to manufacture. It is possible to easily attach the bag to the body by using the heat-sealing means at the bottom, and there is no risk of breakage from the attachment part.

Therefore, the present invention can provide an easy-to-use liquid bag that is particularly suitable for use as a liquid container in combination with a cardboard box or the like. Of course, the bag of the present invention can also be suitably used for transporting liquid by itself.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Fig. 1 is a partially cutaway perspective view, Fig. 2 is a partially cutaway enlarged perspective view of the main part, and Figs. 3 and 4 are front views, respectively. 5 to 7 are sectional views showing other embodiments, FIG. 8 is a perspective view showing an example of use in combination with an outer box such as a cardboard box, and FIG. FIG. 9 is an enlarged perspective view of a portion showing the opening state of the discharge port, and FIG. 10 is an enlarged sectional view taken along the line taken from the front figure. 1...Bag body, 3...Bottom, 5...Joint part, 6...
... Cylindrical body, 7a, 7b... Plate body, 8... Cut.

Claims (1)

[Scope of utility model registration request] One end of a flat cylinder made of a flexible waterproof material is attached near the bottom of the flexible cylindrical bag so that it can be opened, and two flexible, bendable plate-like bodies are attached to the cylinder, facing each other. A liquid bag characterized in that the cylindrical body is opened by the outward bending and expansion of both plate-shaped bodies.