JPH0535057Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a spout structure for injecting or dispensing fluid in a large cardboard container for storing fluids such as liquids, granules, powders, etc.

[Prior art]

Generally, large-sized fluid storage containers are often made of plastic, such as polyethylene containers or tin cans. Cardboard has rarely been used as a fluid storage container due to its water and moisture resistance, but recently the applicant has
We have developed an advantageous manufacturing method for water-resistant cardboard with a plastic film laminated on its surface, and have also succeeded in providing a liquid storage container about the size of a can, assembled from the water-resistant cardboard.

The conventional spout structure of this type of corrugated cardboard container consists of a male-threaded cap protruding from the cardboard wall and a female-threaded cap screwed onto the cap. There was a problem when the mouth part supported the stacking and interfered with stacking.

However, in order to make it easier to pour out the liquid, it is desirable for the mouth to protrude, and if it is recessed, there is a drawback that the liquid will leak when pouring out.

[Purpose of invention]

This idea was developed in consideration of the above-mentioned situation regarding large cardboard containers for storing fluids, and the opening structure is designed so that the opening part can freely move into and out of the cardboard wall, so that it does not interfere with stacking or arranging containers side by side. The purpose is to provide

[Structure of the idea]

The configuration of this invention to achieve the above object is that in a spout structure of a corrugated cardboard container in which a spout for injecting or extracting fluid etc. and a spout thereof are provided in a cardboard wall; A flexible flange is interposed between the flange and the spout to seal the entire circumference between them; the structure of this flexible flange is such that a hole is provided in the center and the inner peripheral edge facing the rear hole side is an inner horizontal portion, and an outer peripheral edge portion facing the mouth periphery side is formed as an outer horizontal portion, and an inclined portion is formed between the inner and outer horizontal portions via inner and outer hinge portions; The inner horizontal part of the flexible brim is fixed to the mouth tube side, and the outer horizontal part is fixed to the mouth hole peripheral part of the corrugated board wall; The gist of the present invention is to provide a spout structure for a corrugated cardboard container in which the spout is supported by the flexible collar so that the spout can be held in the mouth hole either in the direction of protrusion or retraction.

〔Example〕

Figures 1 to 3 show one embodiment, in which the container V is assembled to the size of a can with cardboard in the same manner as commercially available small milk cartons. F is provided with a mouth P for injecting and dispensing fluid at one corner.

The corrugated board consists of a core 1 and front and back liners 2 and 3, and heat-welding films f and f are pasted on the outer surfaces of the front and back liners 2 and 3, and the heat-welding film f
The container V is sealed by welding them together.

The structure of the mouth part P includes a mouth pipe 6 that protrudes from the mouth hole 5.
It consists of a combination of a cap 7 that is screwed onto the mouthpiece 6, and flexible flanges 8a and 8b that support the mouthpiece 6 (Fig. 3).

The opening hole 5 is formed into a larger circular shape than the opening tube 6, and the opening tube 6 has a male screw 6a formed on its outer peripheral surface, a base portion 6b that bulges out in a U-shaped cross section at the lower end, and the base portion 6b is made of corrugated cardboard. The height dimension is approximately the same as the thickness of the wall F. Note that the cap 7 may be a plug that is screwed into the inside of the mouthpiece 6.

The upper and lower flexible flanges 8a and 8b are made of plastic film or plastic sheet made of polyethylene, polyester, vinyl chloride, etc., and have the same shape, and are attached to the base portion 6a of the spout 6 at the peripheral edge facing the central punch hole 9. Inner horizontal part 9 to be glued
a, and a corrugated cardboard wall F on the outer peripheral edge of the flexible collar.
An outer horizontal portion 9b is provided to be adhered to the peripheral edge of the mouth hole 5, and between the inner and outer horizontal portions 9a and 9b are an inner hinge portion 9d and an outer hinge portion 9, respectively.
It is formed as an inclined part 9c which becomes lower inward through the angle e (on the contrary, it may be an inclined part which becomes higher inward). That is, the inner hinge part 9d is provided at the inner peripheral end of the inclined part 9c, and the outer hinge part 9
e is provided on the outer peripheral edge of the inclined portion 9c, and each of the hinge portions 9d and 9e is formed to have so-called hinge properties by giving flexibility or making the portion thinner. .

Note that the upper and lower flexible flanges 8a and 8b may be formed by blow molding.

To attach the spout 6, glue the outer horizontal part 9b of the upper flexible collar 8a to the top surface of the corrugated cardboard wall F, and the inner horizontal part 9a to the upper surface of the base part 6b of the spout 6, and then attach the lower flexible collar 8a to the upper surface of the cardboard wall F. The outer horizontal part 9b of 8b is glued to the lower surface of the corrugated cardboard wall F, and the inner horizontal part 9a is glued to the lower surface of the base part 6b of the spout 6.
The spout 6 is supported on the cardboard wall F by a and 8b,
The spout 6 is depressed into the mouth hole 5 together with the cap 7 (solid line in Figure 2).

In this state where the spout 6 is attached, the inclined portions 9c of the upper and lower flexible flanges 8a, 8b,
9c, the outer circumferential surface 10a of the base portion 6b of the spout 6, and the inner circumferential surface 10b of the mouth hole 5 form a parallelogram whose inner end is inclined downward, and of these, the outer circumferential surface 10a and the inner circumferential surface 10b. Since the distance between them is always constant, the parallelogram shape is stable and difficult to deform. In other words, the spout 6 is stably held at a fixed position depressed into the mouth hole 5. However, the slope part 9
c and 9c have flexibility, so when the mouthpiece 6 is lifted, the inclined parts 9c and 9c are bent and lifted together against the elasticity, forming an upwardly inclined parallelogram. The spout 6 is stably held at a fixed position protruding from the mouth hole 5 (double-dashed line in FIG. 2). Or, conversely, if the spout 6 is pushed into the mouth hole 5, it will remain in the state of being depressed into the mouth hole 5 as described above (solid line in the figure).

[Other Examples]

FIG. 4 shows another embodiment, in which the opening 5 of the corrugated board wall F is formed to have approximately the same diameter as the cap 7, and the inner surface of the corrugated board wall F has a support frame 11 surrounding the opening 5. A mounting portion 11a for the flexible collar 8 is provided on the support frame 11 at a distance from the inner surface of the corrugated board wall F.

Only one flexible collar 8 having the same shape as in the above embodiment is used, and its inner horizontal portion 9a is connected to the mouthpiece 6.
It is adhered to the lower surface of the base portion 6b at the lower end, and the outer horizontal portion 9b is adhered to the lower surface of the mounting portion 11a of the support frame 11.

In this case, the mouth tube 6 is stable in both the recessed and protruding positions due to the same action as in the previous embodiment. However, since the flexible flange 8 is one piece, the reason for this can be explained in a different way from that in the previous embodiment. When the mouth tube is lifted, the inner peripheral end of the inclined portion 9c, i.e., the inner hinge portion 9d, rises vertically, and the distance between the outer peripheral end, i.e., the outer hinge portion 9e, and the inner hinge portion 9d is shortened, so that the flexible flange 8 is bent against the elastic force. When the distance between them becomes equal (two-dot chain line), the inclined portion 9c rises vertically.
The bend in c is released so that the shape is maintained.

FIG. 5 shows yet another embodiment, in which circular intermittent or perforation-like cuts 12 are carved in the corrugated cardboard wall F.
The mouth hole 5 is formed unopened, the mouth tube 6 and the cap 7 are hidden under the sealing piece 13 that seals the mouth hole 5, and the mouth tube 6 and the cap 7 are hidden by the support frame 11 and the flexible collar 8. I support it as well.

When pulling out the spout 6 and cap 7 as shown by the two-dot chain line, the sealing piece 13 is removed.
Since direct collision of other objects with the cap 7 is avoided until it is removed, the structure of the opening portion P is highly stable, making it suitable for transporting and storing dangerous materials without allowing any leakage.

[Effect of idea]

As explained above, according to this invention, a flexible collar that supports the mouth tube is interposed between the mouth hole periphery and the base end of the mouth tube, and the flexible collar has an inclined part in the periphery-outward direction. By reversing the sloped part, the spout can be held either in or out of the spout, so when stacking containers, the spout can be dropped into the spout so as not to get in the way, and the fluid can be It has the excellent effect of allowing the spout to protrude to prevent leakage when pouring.

[Brief explanation of the drawing]

1 to 3 show one embodiment, FIG. 1 is a perspective view of a cardboard container, FIG. 2 is an enlarged sectional view taken along line A-A in FIG. 1 showing the mouth structure, and FIG. The figure is an exploded perspective view of the same part. 4 and 5 are sectional views corresponding to FIG. 2 showing other embodiments, respectively. F...Cardboard wall, P...Mouth, 5...Mouth hole,
6... mouthpiece, 8, 8a, 8b... flexible tsuba, 9...
Extraction hole, 9a...inner horizontal part, 9b...outer horizontal part, 9c...slanted part, 9d...inner hinge part, 9
e...Outside hinge part, 11...Support frame.

Claims (1)

[Scope of Claim for Utility Model Registration] 1) In a spout structure of a corrugated cardboard container in which a spout for injecting or dispensing fluid, etc. and a spout thereof are provided in a cardboard wall; A flexible flange is interposed between the tube and the tube to seal the entire circumference; the structure of this flexible flange is such that a hole is provided in the center, and the inner peripheral edge facing the hole side is turned into an inner horizontal portion. and forming an outer peripheral edge portion facing the mouth hole peripheral edge side as an outer horizontal portion,
The inner and outer horizontal parts are formed into inclined parts via inner and outer hinge parts, and the inner horizontal part of the flexible collar is fixed to the spout side, and the outer horizontal part is connected to the mouth hole peripheral edge of the corrugated board wall. a corrugated board, characterized in that the mouth tube is supported by the flexible collar so that it can be held in the mouth hole by reversing the inclined portion as the hinge portion bends and reversing; Mouth structure of manufactured containers. 2) The opening structure of a cardboard container according to claim 1, wherein the flexible flange is blow-molded from plastic. 3) The mouth structure of a corrugated cardboard container according to claim 1, wherein the flexible collar is formed of a hard plastic film. 4) The opening structure of a cardboard container according to any one of claims 1 to 3 of the utility model registration claim, characterized in that the opening hole is opened. 5) By providing intermittent cuts in the cardboard wall to open the opening, the opening is left unopened, and it is possible to detect that the opening is hidden under the sealing piece that seals the opening. A mouth structure in a cardboard container according to any one of claims 1 to 3 of the registered utility model claims.