JP2007099391A - Paper container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gable-top paper container which is easily opened, is excellent in hermetic sealability, and is manufactured at a low cost. <P>SOLUTION: The paper container has a gable roof type top part which keeps the folded part of one of gables extended in left and right both sides, and a mountain shape folded part 1 is projected forward so that a spout having a lozenge shape is formed, at the time of opening. One or more horizontal reinforcing lines L are formed on the outer side face BCD of the folding part composing the spout. It is preferable that one or more vertical reinforcing lines L' are formed on the inner side face ABC of the folding part composing the spout. The inner side face is also preferably provided with a mark 3, indicating a position to place a finger when the mountain shape folding part is projected forward, at the height of one third to two third from the bottom of the mountain shape folding part 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a paper container that can be easily opened. More specifically, the present invention relates to a square columnar paper container having a gable roof-type top that can be easily opened.

  A square columnar paper container (so-called gable top-type paper container) having a gable roof-type top is a container that is widely used for storing liquids such as beverages. This paper container has two sets of opposing quadrangular side panels, and the top part is folded inwardly from a chevron fold formed at the top of a pair of counter panels, and another set of counter panels. It is formed by folding the upper part of the gable into a gable roof shape and sealing it. Adhesion of the top of the head is carried out by thickly attaching the upper part, and it is firmly bonded so that the contents do not leak even by changes in paper quality due to conditions such as outside air temperature, humidity, and storage period.

  When opening the above-described gable top type paper container, the one-side mating portion is spread to the left and right sides, and the chevron folds are projected forward to form a diamond-shaped spout. However, since the closeness of the top of the head is strong, there are many cases where it cannot be opened well.

  As a paper container for solving such a problem, for example, there are inventions of Patent Documents 1 and 2.

  According to the paper container of Patent Document 1, by providing a half-cut line on the paperboard material and pulling the half-cut line as a knob, it is possible to open the folding pour-out spout, so the opening operation is hygienic, It can be done easily and reliably. In addition, since the half-cut line is peeled off at the time of opening to form a knob, it is not obstructed during handling of the container during box making, and is formed at the top when the paper container is sealed. Because it is covered with a gable roof, half-cut lines are not accidentally peeled off during handling of paper containers.

Further, according to the paper container of Patent Document 2, since the half length part of the outer seal panel in the gable roof forming panel forming the top seal is removed by peeling at the beginning of opening, it is folded inward. The inner seal panel of the end wall forming panel, which is a spout (outlet) panel, is easy to open, and the user's opening operation is simplified.
JP-A-10-236461 JP 2000-79939 A

  However, in the paper container of Patent Document 1, since it is necessary to provide a half cut line, there is a risk of impairing the sealing performance. In addition, the paper container of Patent Document 2 has a problem that the thick part of the top is deformed, resulting in paper loss and high cost.

  Gable-top type paper containers often contain liquids, so improvements that may impair the sealing performance are not preferred, and because they are products that are consumed in large quantities every day, the cost is kept to a minimum. Is desirable.

  In view of such a point, an object of the present invention is to provide a gable-top type paper container that is easy to open, has excellent sealing properties, and can be produced at low cost.

  The present invention is a quadrangular columnar paper container having a gable roof-type top, which has two sets of opposing quadrangular side panels, and the top is formed on top of a pair of opposing panels. It is formed by folding the angled folds inward and folding the upper part of another pair of opposing panels into a gable roof shape to form a sealed state. In a paper container capable of forming a diamond-shaped spout by spreading and projecting the chevron fold forward, one or more horizontal reinforcing lines L are formed on the outer side surface of the folding portion constituting the spout. The above problem is solved by forming (see FIG. 2a).

  As a first stage of the opening operation, when the folding part is opened on both the left and right sides and pushed out until it hits the rear roof part, the repulsive force (C → A) near the apex A of the mountain-shaped folding part (see FIG. 4: triangle ABB) The direction force is concentrated. According to this paper container, since the one or more horizontal reinforcing lines L are provided on the outer side surface of the folding portion constituting the pouring spout, and the paper is reinforced in the horizontal direction, the repulsive force is a strong point. It concentrates effectively (near point A) and is easier to open.

  Further, it is preferable that one or more vertical reinforcing lines L ′ are formed on the inner side surface of the folding portion constituting the spout (see FIG. 2 b).

  As the second stage of the opening operation, when a finger is applied to both sides (side BC) of the spread surface and the chevron fold is protruded forward, a repulsive force starting from the vicinity of point A acts (FIG. 4). Reference: A → C direction force). According to this paper container, one or more vertical reinforcing lines L ′ are provided on the inner side surface of the folding portion, and the inner side paper is easily bent in the direction in which the force is applied. The side paper is more easily peeled off from the outer side paper and easier to open.

  In addition, by using two or five horizontal reinforcing lines and two vertical reinforcing lines, respectively, the paper on the outer side surface of the folded portion is strengthened in the horizontal direction, and the paper on the inner side surface is set in the horizontal direction. Since it can be easily bent, it can be opened more easily.

  Further, a mark indicating a position where a finger is applied to the inner side surface of the folding portion constituting the pouring spout when projecting the mountain-shaped folded portion forward is provided from the bottom of the mountain-shaped folded portion by 1/3 to 2 / It is preferable to provide at a height of 3.

  In the conventional gable top type paper container, the finger contact position when pushing out the spout is indicated by the design or the like as the vicinity of the margin part (G part). However, since a large force is required for opening by placing a finger near the middle of the side BC, a larger force is applied near the point A, and as a result, the opening can be performed without failure. Therefore, by providing a mark at a height of 1/3 to 2/3 from the bottom side of the mountain-shaped folded portion and guiding the position where the finger is applied, it is possible to open the bag more easily and cleanly.

  The paper container of the present invention is effective in the vicinity of the apex of the mountain-shaped folding part, which is the place where the close contact is released first by the horizontal reinforcing line provided on the outer side surface of the folding part. Can be focused. In addition, the vertical reinforcing wire provided on the inner side surface of the folding portion can easily bend the paper on the inner side surface in the horizontal direction, and can easily peel off the adhesion. Furthermore, a user's finger | toe can be guide | induced to the position suitable for opening by providing the mark which instruct | indicates a finger contact position in the height of 1/3-2/3 from the base of a mountain-shaped folding part. According to the paper container of the present invention, it is easy to open and it is not necessary to change the shape of the conventional gable-top type paper container, so that the sealing performance is not impaired, and without significant design change, Can be manufactured.

  The reinforcing wire of the present invention is not particularly limited as long as the strength of the paper can be increased in the line direction, for example, it may be by embossing, or may be a convex line provided by printing, Moreover, it may be a streak (concave line) provided by a stamping die or the like, similar to the crease line of the paper container, or may be one in which a linear member is pasted.

  At least one of the horizontal reinforcing wires and the vertical reinforcing wires is preferably two to five, and more preferably three to four. More preferably, both are formed from two to five, and particularly preferably, both are formed from three to four.

  When there is one horizontal line L, the line L is preferably formed near the center between BCs. When there are a plurality of lines L, it is preferable that the lines L be formed uniformly around the midpoint between BCs.

  When there is one vertical line L ′, the line L ′ is preferably formed near the center between AC. In the case where there are a plurality of lines L ′, it is preferable that they are formed uniformly around the midpoint between AC.

  It is preferable that the mark indicating the finger contact position is at a height of 1/3 to 2/3 from the bottom of the chevron fold. Particularly preferred is a height of about 1/2. Even when the reinforcing lines L and L ′ are not provided, by providing a mark indicating the finger contact position at the above position, the ease of opening is greatly improved and the probability of unsuccessful opening is reduced.

  Hereinafter, the easily openable paper container according to the present invention will be described in more detail by way of examples.

  1 is a perspective view showing an embodiment of an easily openable paper container according to the present invention (sealed state), FIG. 2 is the paper container of FIG. 1, and a is a left side view in a sealed state, b FIG. 3 is a front view showing a state in which the folding portion is widened to the left and right, and FIG. 3 is a view showing a method for opening the paper container of FIG.

  The paper container according to the present invention is a quadrangular columnar paper container having a gable roof-type top as shown in FIG. 1, and two sets of opposing rectangular side panels (X and X ′ and Y and Y ′). X ′ and Y ′ do not appear in the figure), and the top of the head is folded inwardly from a chevron fold 1 formed on the top of a pair of opposing panels (X and X ′). The upper portion 2 of the opposite panel (Y and Y ′) is folded into a gable roof shape to form a sealed state.

  At the time of opening, a diamond-shaped pouring spout is formed by expanding two folded portions bonded to one hand on the side of one wife to the left and right sides and projecting the chevron folded portion 1 forward (see FIG. 3).

  In the paper container of the present embodiment, four horizontal reinforcing lines L are formed on the outer side surface (see FIG. 2a: triangle BCD portion) of the folding portion, and on the inner side surface (see FIG. 2b: triangle ABC portion). The four vertical reinforcement lines L ′ are formed, and the finger contact position when forming the pouring spout by projecting the chevron folds forward at a height of ½ from the bottom of the chevron folds. Indicating mark 3 (arrow shape) is provided. The reinforcement lines L and L ′ are both concave lines similar to the crease lines of the paper pack, and are formed by a pressing die. In addition, each is formed in a place excluding the glue margin G, and further, a gap of about 1 mm is provided between the upper end of the vertical line L ′ and the lower side of the glue margin G to ensure the sealing of the container. Is open.

  The method for opening the paper container is exactly the same as the conventional method except for the finger contact position. That is, first, the two folding parts bonded to the palm shape are opened on both the left and right sides (see FIG. 3a), and are spread until they hit the rear roof part (see FIG. 3b). At this time, since the outer side surface of the folded portion is reinforced in the direction in which the force is applied by the reinforcing line L, the repulsive force is more effectively concentrated near the apex of the mountain-shaped folded portion. Next, a finger is applied to both sides of the spread surface to protrude forward with the apex of the chevron folded portion as a tip (see FIG. 3c). At this time, the paper on the outer side surface of the folded portion is less likely to bend in the direction in which the force is applied by the reinforcing line L, and the paper on the inner side surface of the folded portion is more bent in the direction in which the force is applied by the reinforcing line L ′. Due to the ease, the paper on the inner side peels off the paper on the outer side more easily.

  Further, since the paper container of this embodiment is provided with an arrow indicating the finger contact position at a height of about ½ from the bottom side of the mountain-shaped folded portion (that is, near the middle point of the side BC), the paper container is opened. In operation, the practitioner's finger is guided to this mark and a force is applied to this position. As the distance from the margin portion G (contact portion) increases, a larger force is required for opening, so that a larger force is applied near the point A than when a force is applied near the margin portion. By the reaction, the adhesive margin G is peeled off vigorously, and can be reliably opened without failure.

FIG. 1 is a perspective view showing an embodiment of an easily openable paper container according to the present invention (sealed state). FIG. 2 is the paper container of FIG. 1, in which a is a left side view in a sealed state, and b is a front view in a state in which the folding portion is expanded to the left and right. FIG. 3 is a view showing a method for opening the paper container of FIG. FIG. 4 is a plan view of a conventional paper container in a state in which the folded portion is expanded left and right and pressed against the roof portion.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Yamagata folding part 2 Upper part of side panel Y 3 Mark L which designates finger contact position Horizontal reinforcement line L 'outside the folding part Vertical reinforcement line inside the folding part X Side panel Y Side panel G Paste allowance Part G 'glue margin

Claims (5)

A square columnar paper container having a gable roof-type top,
Having two sets of opposing rectangular side panels,
The top of the head is formed by folding inwardly a chevron fold formed on the top of a pair of opposing panels, and folding the top of the other pair of opposing panels into a gable roof to provide a sealed state,
At the time of opening, in a paper container that can form a diamond-shaped pouring spout by expanding one wife side folding part to the left and right sides, and projecting the chevron folding part forward
One or more horizontal reinforcing lines are formed on the outer side surface of the folding portion constituting the spout,
Easy-to-open paper container.   The paper container according to claim 1, wherein one or more vertical reinforcing lines are formed on an inner side surface of the folding portion constituting the spout.   The paper container according to claim 2, wherein the horizontal reinforcing lines and the vertical reinforcing lines are two to five, respectively.   Provided on the inner side surface of the folding part constituting the spout is a mark for indicating a finger contact position when the chevron fold part protrudes forward, and the mark is 1/3 from the bottom of the chevron fold part. The paper container according to any one of claims 1 to 3, which is at a height of 2/3. A square columnar paper container having a gable roof-type top,
Having two sets of opposing rectangular side panels,
The top of the head is formed by folding inwardly a chevron fold formed on the top of a pair of opposing panels, and folding the top of the other pair of opposing panels into a gable roof to provide a sealed state,
At the time of opening, in a paper container that can form a diamond-shaped pouring spout by expanding one wife side folding part to the left and right sides, and projecting the chevron folding part forward
Provided on the inner side surface of the folding part constituting the spout is a mark for indicating a finger contact position when the chevron fold part protrudes forward, and the mark is 1/3 from the bottom of the chevron fold part. It is 2/3 in height,
Easy-to-open paper container.

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