JPH0811875A - Clip for closing opening of paper pack - Google Patents

Abstract

PURPOSE:To simply and accurately seal the opening of the paper pack such as the so-called milk carton for storing milk, fruit juice, alcoholic liquors, etc. CONSTITUTION:A clip body 1 with hand drum-like cross section has a slit-like opening part 11 at its lower end face and the opening of a paper pack is held and sealed between the opening part 11 and a central narrow part 12 of the clip body. Therefore, flaps 21a are inserted into the clip body and pressed against each other by the resilient forces of the slightly spaced-apart opposite edges of the opening part and of the narrow part exterted on the side faces of the flaps 21a from both the sides.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clip for opening / closing an opening of a paper pack such as a so-called milk carton for containing milk, fruit juice or alcohol.

[0002]

2. Description of the Related Art Recently, a substantially box-shaped paper pack such as a so-called milk carton is often used as a packaging container for storing the above milk, fruit juice, liquor and the like. This type of paper pack 2 is generally formed into a flat bottomed rectangular tube at the bottom, and the top is formed at the upper end by bending the tops of the side surfaces 21, 21 facing each other into a mountain shape as shown in FIG. Between the sealing flap portions 21a, 21a, the upper ends of the other opposing side surfaces 22, 22 are folded in a gusset shape from both sides and sealed by heat sealing or the like.

When the contents of the paper pack 2 are poured out, the sealing flap portions 21a, 21a are opened, and the flap portion 21a constituting the opening is formed.
The upper end portion 22 of the side surface 22 folded between the flap portions 21a and 21a after the half of the mating surface of 21a is peeled off
a is pulled out and opened as shown in FIG.
The contents are poured out from. After pouring out, the upper end 22a of the side surface 22 is again attached to the flaps 21a.
It is put back in a gusset shape between 1a and stored in a refrigerator or the like.

[0004]

However, even if the upper end portion 22a of the side surface 22 is returned to the gusset-like folded state as described above, the flap portion 21a constituting the opening is formed.
The 21a could not be returned to the close contact state, and there were problems such as a gap often being formed and milk contained therein was spilled or foreign matter such as dust entered.

The present invention has been proposed in view of the above problems, and an object of the present invention is to provide a closing clip capable of easily and reliably sealing the opening of a paper pack as described above.

[0006]

In order to achieve the above object, the opening / closing clip according to the present invention has the following structure. That is, a slit-shaped opening is formed on the lower surface of the clip body having a substantially hourglass-shaped cross section, and the opening of the paper pack is sandwiched between the opening and the narrowed portion at the central portion of the hourglass-shaped clip body for sealing. It is characterized by doing so.

[0007]

As described above, the opening of the paper pack is sandwiched between the slit-shaped opening on the lower surface of the clip body having a substantially drum-shaped cross section and the narrowed portion at the central portion of the clip body to perform sealing. It becomes possible to easily and surely seal the opening opening.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A clip for opening and closing an opening of a paper pack according to the present invention will be specifically described below with reference to an embodiment shown in the drawings.

FIG. 1 is a perspective view showing an embodiment of a closing clip according to the present invention, FIG. 2 is a front view thereof, and FIG. 3 is a sectional view taken along line AA in FIG. In the figure, 1 is a clip body, and the body 1 is formed in a substantially drum shape in cross section as shown in FIG. 2, and the length in the left-right direction in FIG. 3 is the same as the length of the flap portion 21b of the paper pack 2 in FIG. They are formed in substantially the same way.

Although the material and manufacturing method of the clip body 1 are appropriate, the clip body 1 can be easily manufactured by injection molding or extrusion molding using a synthetic resin or the like. In this case, if calcium carbonate is added, it can be incinerated and discarded when it is no longer needed, and can be disposed of as combustible waste at home.

A slit-shaped opening 11 is formed on the lower surface of the clip body 1 over the entire length in the longitudinal direction of the clip body 1, and a constriction 12 is formed in the center of the hourglass-shaped clip body 1 so as to approach each other. As shown in FIGS. 4 and 5, the slit-shaped opening portion 11 and the narrowed portion 12 have an opening for opening the paper pack 2, that is, the flap portion 2.
1a is sandwiched and sealed.

When the opening 11 and the narrowed portion 12 are attached to the flap portion 21a, for example, the slit-like opening portion 11 is placed downward and the clip body 1 is pushed in from above the flap portion 21a. At that time, it is possible to attach the clip body 1 formed in an hourglass shape by pinching the recessed portions on both sides with the fingers.

The opening 11 and the narrowed portion 12 are formed to be slightly narrower than the thickness of the flap portion 21a. When the flap portion 21a is inserted, the opening 11 and the narrowed portion 12 are slightly opened, and their elastic restoring force is increased. And the facing edges 11a and 11a of the opening 11 and the facing surface 12a of the narrowed portion 12
The opening 12a of the paper pack 2 can be satisfactorily sealed by pressing the side surface 12a of the flap portion 21a from both sides.

The narrowed portion 12 has a flap portion 21.
It is configured so as to be positioned within the linear groove 21b formed when a is sealed by heat sealing or the like as described above, thereby preventing upward displacement of the clip body 1 and the like. There is.

The facing edges 11a and 11a of the slit-shaped opening 11 and the facing surfaces 12a and 1 of the narrowed portion 12 are described.
2a may be formed to have an arcuate cross section as in the illustrated example, and by doing so, it is possible to smoothly perform the operation of mounting the flap portion 21a from above as described above.

It is preferable that the lower surface of the clip body 1 is provided with a slope for guiding the insertion of the flap 21a into the opening 11, and in this embodiment, the opening 11 is formed on the lower surface of the edge of the opening 11. Mountain-shaped guide slope 11
b is provided. By doing so, the flap portion 21a can be smoothly inserted into the opening 11. In addition, the above-mentioned slope may be provided substantially on the front surface of the lower surface of the clip body 1, and it is not limited to the slope, and it may be formed into a curved surface or the like.

Further, the opening 11 and the narrowed portion 12 described above.
Is to press against the side surface of the flap portion 21a by the elastic restoring force when the flap portion 21a is inserted as described above. At least a part of the wall thickness of the upper corner portion 13 of the clip body 1 is appropriately changed. Therefore, it is possible to adjust the pressure contact force. In the illustrated example, the upper corner 1
3, a part 13a of the inner surface of 3 is thickly formed. By doing so, the elastic restoring force is increased and the opening 11
Also, it is possible to increase the holding force of the narrowed portion 12 with respect to the flap portion, and it is possible to secure a sufficient holding force without making the thickness of the entire clip body too large, and thus it is possible to reduce the weight and the manufacturing cost. Can be planned.

FIGS. 6 and 7 show another embodiment of the opening / closing clip of the paper pack according to the present invention, in which the upper surface of the clip body 1 has a projection 1a and the lower surface thereof has substantially the same shape as the projection 1a. Each of the large recesses 1b is formed.
The other structure is almost the same as that of the above-mentioned embodiment.

When the projection 1a is formed on the upper surface of the clip body 1 and the recess 1b is formed on the lower surface as described above, a plurality of used clip bodies are collected to form the projection 1a and the recess 1b as shown in FIG. When they are fitted together, they can be used as block toys. In this case, the concave portion 1b is formed in the slit-shaped opening portion 1 on the lower surface of the clip body as shown in the figure.
1 and the diameter of the recessed portion 1b in the direction perpendicular to the slit-shaped opening 11 in the free state so as to straddle the projection 1a.
If it is formed to be slightly smaller than
When the protrusion 1a is inserted in b, the slit-shaped opening 1
1 opens a little, and its elastic restoring force causes the projection 1a to be inserted into the recess 1b.
It has the advantage that it can be clamped and firmly fitted and fixed.

[0020]

As described above, the clip for opening and closing the opening of the paper pack according to the present invention has the slit-shaped opening 11 on the lower surface of the clip body 1 having a substantially hourglass-shaped cross section, and the opening 11 and the above-mentioned opening 11. Since the opening of the paper pack is sandwiched between the central portion of the hourglass-shaped clip body and the narrowed portion 12, the opening of the paper pack can be easily and surely sealed. It has the effect of achieving the purpose well.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a clip for closing an opening of a paper pack according to the present invention.

FIG. 2 is a front view of the clip according to the above embodiment.

3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a perspective view showing a state in which the clip according to the above embodiment is attached to the opening of a paper pack.

FIG. 5 is an enlarged front view of the main part.

FIG. 6 is a perspective view showing another embodiment of the paper opening pack closing clip according to the present invention.

FIG. 7 is a cross-sectional front view of the clip according to the above embodiment.

FIG. 8 is a perspective view showing a state in which the clip according to the above embodiment is used as a block toy.

FIG. 9 is a perspective view of the upper part of the paper pack.

FIG. 10 is a perspective view of the paper pack with the opening opening opened.

[Explanation of symbols]

 1 Clip Main Body 11 Slit-shaped Opening 11a Opposing Edge 11b Slope 12 Constriction 12a Opposing 13 Upper Corner 2 Paper Pack 21a Opening Port (Flap)

Claims (4)

[Claims] 1. A clip body having a substantially drum-shaped cross section has a slit-shaped opening on the lower surface, and an opening of a paper pack is sandwiched between the opening and the narrowed portion at the center of the drum-shaped clip body. A clip for opening and closing an opening of a paper pack, characterized by being sealed. 2. The clip for closing the opening of a paper pack according to claim 1, wherein an inclined surface for guiding the insertion of the paper pack opening into the opening is formed at an edge of the slit-shaped opening. 3. The paper according to claim 1, wherein at least a part of the inner surface of the upper corner portion of the hourglass-shaped clip body is formed thick to adjust the pressure contact force with respect to the opening of the paper pack. Clip for opening and closing pack opening. 4. A clip for opening and closing an opening of a paper pack according to claim 1, 2 or 3, wherein a protrusion is formed on the upper surface of said clip body, and a concave portion having substantially the same shape and size as the protrusion is formed on the lower surface.