JP2003300538A - Packaging bag and structure of opening guiding line used for packaging bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging bag which can be smoothly and surely opened by a perforation having a simple shape. <P>SOLUTION: In the packaging bag 11 in which a surface side packaging base material 12 and a back surface side packaging base material 13 face each other and their peripheral edges 14 are sealed, and opening guide lines 16 are respectively provided at a corresponding position of each face of one side packaging base material 12 and the other side packaging base material 13, the opening guide lines 16 are constituted of a basic guide line 22a reaching the other side edge part from one side edge part and auxiliary guide lines 22b and 22c provided along the basic guide line 22a on the upper position and the lower position of the basic guide line 22a. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag having an opening guide wire such as a perforation and a structure of the opening guide wire used for the packaging bag.

[0002]

2. Description of the Related Art Conventionally, there are various types of unsealing guide wires (perforations, etc.) in packaging bags. The most basic one is a linear perforation 1 having only one thread as shown in FIG. 20. However, in this perforation 1, as shown in FIG. There was a case that it could not be opened straight along the line. Therefore, in order to correct the tearing direction at the time of opening the above, FIG.
(A) As shown in (b), one cut line perforation itself is formed in a deformed perforation shape such as a "Y" shape or an arc shape, and the deformed perforation is continuously arranged. A row of deformed perforations having a function of correcting the tearing direction is provided, and a plurality of rows of the perforated deformed rows are arranged (Patent Document 1).

Further, the perforation as described above is generally provided at the same position on the front surface side packaging base material and the back surface side packaging base material of the packaging bag facing each other. The rows of deformed perforations formed on the backing material and the rows of deformed perforations formed on the back side packaging base material are shifted in parallel to form an overall staggered pattern. There is also a packaging bag that leaves an opening flap (Patent Document 2).

[0004]

[Patent Document 1] Utility model registration No. 2566444

[Patent Document 2] Japanese Patent Laid-Open No. 2001-151246

[0005]

By the way, in the deformed perforation as described above, one deformed perforation itself has a complicated shape such as a combination of straight lines facing a plurality of directions or a combination of straight lines and curved lines. Therefore, there is a problem in that a blade die having a complicated shape for cutting and forming such a modified perforation is required, and the manufacturing cost of the blade die becomes high.

Further, conventionally, when the front and back packaging base materials are bonded together, the horizontal displacement of the deformed perforations on the front and back sides occurs. Therefore, in order to absorb the displacement, the row of deformed perforations shown in FIG. It was necessary to form multiple rows. That is, conventionally, a plurality of rows of the deformed perforations having the function of correcting the tearing direction themselves have been formed.
When a plurality of rows of deformed perforations having such a complicated shape are cut and formed in a packaging bag, the strength of the deformed perforation portion of the packaging bag is reduced, and bending occurs from the perforation position during transportation of the package, etc. There is also a problem that the risk of bag tearing from the eye increases.

Further, in the unsealing guide wire which leaves the flap as described above, since the entire perforations formed on the front surface side and the back surface side are formed in different steps, the perforations on the front surface side and the back surface side are simultaneously formed. Sometimes, it could not be cut smoothly and neatly.

The present invention has been made in view of the above problems of the prior art, and does not use a plurality of rows of deformed perforations having a complicated shape, and uses a simple shape of a cut line to open a single line of guide wire for opening. The present invention aims to provide a packaging bag that can be opened smoothly and reliably.

Another object of the present invention is to provide a packaging bag which can form an opening flap and which can be opened smoothly and reliably.

Further, according to the present invention, the guide wire for opening can be formed on the packaging base material with high positional accuracy, and the positional deviation between the front and back of the guide wire for opening can be reduced. An object of the present invention is to provide a packaging bag that can be smoothly and surely opened, and a structure of an opening guide wire used for the packaging bag.

[0011]

In order to achieve the above object, the present invention is, firstly, one in which one side packaging base material and the other side packaging base material are opposed to each other and their peripheral edges are hermetically sealed. In the packaging bag in which the unsealing guide wire is provided at the corresponding position on each surface of the one side packaging base material and the other side packaging base material,
The unsealing guide wire is provided along one line of the basic guide wire extending from one side edge portion to the other side edge portion of the base material, and above and below the basic guide wire. The basic guiding line is a continuous straight line, and the auxiliary guiding line is a perforation consisting of an intermittent straight line.

The one side packaging base material (front side packaging base material or back side packaging base material) and the other side packaging base material (back side packaging base material or front side packaging base material) are, for example, 2 to 3 layers. It is preferable that the opening guide wire is formed by cutting on each surface of both base materials, for example, the outermost film surface, by using a laminated film having a structure. In the case of a rectangular packaging base material, the peripheral edge may be four sides or three sides. The one side edge portion and the other side edge portion include an edge of each side of the packaging base material or a position near the edge. The corresponding position of each surface of the two base materials, which is the installation position of the unsealing guide wire, may be a position where the unsealing guide wire provided on both base materials overlaps, or as shown in FIG. The positions may be such that the side of the base material is curved downward and the side of the other packaging base material is curved upward. With this configuration, the basic guide wire and the auxiliary guide wires provided above and below the basic guide wire, even if the tearing direction deviates upward or downward from the basic guide wire, the auxiliary guide wire changes the tearing direction of the unsealing guide wire. The correction can be made along the direction, and the unsealing guide wire with a small number of threads enables smooth and reliable unsealing. The auxiliary guide wire consisting of the above intermittent line can also be configured by a horizontal intermittent line,
It can also be configured by an inclined intermittent line. In the case of the inclined intermittent line, the upper and lower auxiliary guide lines can be inclined in the basic guide line direction of the continuous line. The continuous straight line is a horizontal continuous straight line if the unsealing guide wire is straight, but if the unsealing guide wire is curved, it is curved and formed along the curved line. By making the basic guide wire a continuous straight line, it is possible to reduce the ripping resistance, and it is difficult to cause a deviation in the ripping direction, so it is possible to open straightly and smoothly by combining it with an auxiliary guide wire that is an intermittent straight line. .

Secondly, the one side packaging base material and the other side packaging base material are opposed to each other and their peripheral edges are hermetically sealed, and each side of the one side packaging base material and the other side packaging base material. In the packaging bag in which the opening guide wire is provided at the corresponding position of
The unsealing guide wire is provided along one line of the basic guide wire extending from one side edge portion to the other side edge portion of the base material, and above and below the basic guide wire. The above-mentioned basic guide wire is an inclined intermittent line,
The upper auxiliary guide wire is an inclined intermittent straight line inclined in the same direction as the basic guide wire, and the lower auxiliary guide wire or at least the lower end of the auxiliary guide wire in the unsealing direction is the basic guide wire. The packaging bag is characterized in that it is formed of an inclined and discontinuous straight line extending in the direction of.

The above-mentioned at least lowermost auxiliary guide wire may be the lowermost auxiliary guide wire, or the lowermost guide wire and the unsealing guide wire above it.
The inclined intermittent line in which the end of the auxiliary guide wire in the unsealing direction extends toward the direction of the basic guide wire is, for example, FIG.
It can be configured by an auxiliary guide wire such as the auxiliary guide wire (25c, 25c ') shown in (d). According to this structure, since the auxiliary guide wires (25c and the like) are inclined in the basic guide wire (25a) direction along the direction in which the tearing force acts, it is possible to surely open the package.

Thirdly, the one side packaging base material and the other side packaging base material are opposed to each other and their peripheral edges are hermetically sealed, and each side of the one side packaging base material and the other side packaging base material. In the packaging bag in which the opening guide wire is provided at the corresponding position of
The unsealing guide wire is provided along one line of the basic guide wire extending from one side edge portion to the other side edge portion of the base material, and above and below the basic guide wire. The above-mentioned basic guide wire and the above-mentioned auxiliary guide wire are intermittent straight lines, and these basic guide wires and auxiliary guide wires are arranged in a zigzag pattern. It is what is done.

The zigzag arrangement of the basic guide wires and the auxiliary guide wires is preferably constituted by the unsealing guide wires shown in, for example, FIGS. 5 (b) and 6 (b). With this configuration, for example, a portion of the basic guide wire in which the unsealing guide wire (perforation) is not cut (see, for example, FIG.
Since the auxiliary guide wire is located in the range (a 'in (b)), the opening can be performed more smoothly and reliably.

Fourthly, any one of the first to third features is characterized in that the basic guide wire is one piece and the auxiliary guide wire is provided one each above and below the basic guide wire. It is constituted by the packaging bag described in. That is, the three strips of the unsealing guide wire are configured as one single row.

Fifth, any one of the above-mentioned items 1 to 3 is characterized in that the basic guide wire is one line and the auxiliary guide lines are provided two lines above and below the basic guide line. It is constituted by the packaging bag described in.

That is, five strips of the unsealing guide wire are constructed as one singular row. In this way, by constructing the unsealing guide wire in three or five lines, even if there is a horizontal deviation in the position of the guide wire on the one side and the other side of the packaging base material even though it is a single row, the deviation is caused. Can be absorbed and opened smoothly.

Sixthly, the unsealing guide wire of the one-side packaging base material and the unsealing guide wire of the other-side packaging base material are polymerized at both end positions thereof, and the above-mentioned guiding wire of the one-side packaging base material. The wire is formed in a downwardly or upwardly curved line shape continuously from both end positions thereof, and the guide wire of the other side packaging base material is continuously upwardly oriented in a direction opposite to the curved line from both end positions thereof or The packaging bag according to any one of the first to fifth aspects, which is formed in a downward curved line shape.

It is preferable that the unsealing guide wires at both ends are formed linearly. The superposition of the above-mentioned guide wires refers to the case where both guide wires are overlapped, and includes the state where both guide wires are substantially overlapped. According to such a configuration, it is possible to continuously cut from the overlapping portion at both end positions to the curved guide wire for opening, and the directions of the curved lines of the one side packaging base material and the other side packaging base material are opposite to each other. Even if it becomes, it can be smoothly cut along the unsealing guide wire.

Seventhly, the unsealing guide wire is provided with an unsealing guide wire forming blade on the outer peripheral surface of the plate cylinder of a gravure printing machine, and the packaging base material is pressed between the plate cylinder and the plate cylinder. The packaging bag according to any one of the first to sixth aspects, wherein the packaging bag is cut and formed on the packaging base material based on the rotation of the plate cylinder.

Eighthly, the unsealing guide wire is a disk-shaped one in which a receiving roller for the packaging base material is provided in front of the take-up roll section of the gravure printing machine, and an outer peripheral surface is provided with a blade for forming the unsealing guide wire. The rotary blade is arranged so as to face the receiving roller, and the disk-shaped rotary blade is brought into contact with a packaging base material passing through the upper surface of the receiving roller to form a notch in the packaging base material. The packaging bag according to any one of the above first to sixth aspects.

With this structure, the unsealing guide wires of the one-side and other-side wrapping base materials can be superposed with extremely high positional accuracy, whereby the unsealing guide wire for singular rows can be smoothly and surely unsealed. The resulting packaging bag can be realized.

Ninth, there is provided a structure of an unsealing guide wire of a packaging bag formed by cutting on a packaging base material, wherein the unsealing guide wire is a single strip formed on the surface of the packaging base material. A basic guide wire and auxiliary guide wires formed along the basic guide wire at positions above and below the basic guide wire. The unsealing guide wire is provided on the outer peripheral surface of the plate cylinder of the gravure printing machine. A guide wire forming blade for opening the guide wire is installed, and the packaging base material is passed between the impression cylinder and the plate cylinder that are in pressure contact with the plate cylinder, and cut into the packaging base material based on rotation of the plate cylinder. It is formed by the structure of the unsealing guide wire used in the packaging bag.

Tenthly, there is provided a structure of an unsealing guide wire for a packaging bag formed by cutting on a wrapping base material, wherein the unsealing guide wire is formed by cutting on the surface of the wrapping base material. A basic guide wire and an auxiliary guide wire formed by cutting along the basic guide wire at a position above and below the basic guide wire. The unsealing guide wire is a winding roll portion of a gravure printing machine. A disc-shaped rotary blade provided with a receiving roller for the packaging base material at the front stage and an outer peripheral surface provided with a blade for forming an unsealing guide wire is arranged to face the receiving roller, and the upper surface of the disc-shaped rotary blade is received. The opening guide wire for use in a packaging bag is characterized in that the packaging base material is cut into the packaging base material by making contact with the passing packaging base material.

Eleventhly, the basic guide wire is a continuous straight line, and the auxiliary guide wire is a perforated line consisting of a discontinuous straight line, which is used for the packaging bag according to the ninth or tenth aspect. It is constructed by the structure of the guide wire for use.

Twelfth, the basic guide wire and the auxiliary guide wire are perforated in the form of an intermittent straight line, and the structure of the opening guide wire used in the packaging bag according to the ninth or tenth aspect. It is composed of

When a packaging bag is formed from the packaging base material having the opening guide wire of the above ninth to twelfth structure cut and formed, the opening guide wire can be polymerized with high positional accuracy. A packaging bag having an unsealing guide wire that can be smoothly and surely unsealed can be realized.

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below.

1 to 3 and 8 show a packaging bag 11 according to the present invention. The packaging bag 11 has a rectangular front side packaging base 12 and a rectangular back side packaging base. Material 1
3, and these packaging base materials 12 and 13 are opposed to each other to form a four-sided seal structure in which four sides of the peripheral edge 14 are closed. A three-way seal structure in which the rectangular packaging base material is folded in two and the peripheral edges 14 on three sides are closed may be used. Also,
The packaging bag of the present invention is not limited to those shown in the above respective drawings,
This includes zipper bags with zips (zip bags), self-standing bags, gusset bags, and other shapes.

The front surface side packaging base material 12 and the back surface side packaging base material 13 of the packaging bag 11 are, as shown in the sectional view of FIG. 4, an unsealing guide wire 16 (3 or 5 strips). ) The outermost perforated base material 15a (for example, synthetic resin film or the like) in which notches are formed, and the bonding material 15b for the intermediate layer
(For example, synthetic resin film, aluminum foil, etc.), innermost bonding material 15c (for example, synthetic resin film, etc.)
Etc., and has a three-layer laminated structure in which these three-layer films are laminated. In addition, the packaging bag 11 has the above 3
The number of layers is not limited to three, and may be two or more. In any case, it is preferable to cut and form the unsealing guide wire 16 on the surface of the outermost perforated base material 15a. Perforations can also be provided.

The packaging bag 11 is shown in FIG. 16 (a).
The auxiliary guide wires 16b and 16b 'may be half-cut with respect to the perforated base material 15a as shown in FIG. 1, or the basic guide wire 16a may be cut as shown in FIG.
5a may be half-cut. Although the films shown in FIGS. 4 and 16A and 16B have a three-layer structure, they may have a two-layer structure in which the innermost bonding material 15c does not exist. Further, the unsealing guide wires 16a, 16b,
16b 'is a perforated base material 15 as shown in FIG.
It may be provided so as to penetrate from a to the bonding material 15b, or only the basic guide wire 16a is provided so as to penetrate the bonding material 15b as shown in FIG.
b and 16b 'are provided only on the perforated base material 15a,
As shown in FIG. 8E, the basic guide wire 16a may be provided only on the perforated base material 15a, and only the auxiliary guide wires 16b and 16b 'may be provided so as to penetrate to the bonding material 15b. As described above, the depth at which the unsealing guide wire 16 is provided can be variously configured.
Although a film having a three-layer structure is shown in FIGS. 4 and 16 above, the film may have a two-layer structure as described above, or may have three or more layers, that is, a four-layer structure or a five-layer structure. The optimum laminated structure is determined according to the application.

The unsealing guide wire 16 (see FIG. 4 etc.)
The outermost perforated base material 15a of the packaging bag 11 is cut and formed, and its specific shape will be described later, but the cut forming position is the lower side of the packaging bag 11 of FIG. The packaging bag 1 of FIG. 2 is formed by cutting linearly from one side edge portion 17 to the other side edge portion of the upper side 18.
1 is linearly cut from one side edge portion of the left side 19 to the other side edge portion of the right side 20, and in the packaging bag 11 of FIG. 3, the left side 19 is formed at the upper corner portion of the bag 11.
The corner portion is linearly cut in a diagonal direction from the one side edge portion to the other side edge portion of the upper side 18, and each side of the opening guide wire 16 is close to the side edge of the packaging bag 11. The cut-out piece 21 is formed in the portion. When the front surface side packaging base material 12 and the back surface side packaging base material 13 are opposed to each other, these unsealing guide wires 16 are both base materials 1.
It is provided so as to overlap at corresponding positions on the surfaces of Nos. 2 and 13, specifically, at substantially the same position (overlapping position) facing each other,
By holding the cutting piece 21 and pulling it in the direction of arrow A,
The cut piece 21 is cut along the unsealing guide wire 16, the packaging bag 11 is unsealed, and the contents are taken out. The unsealing guide wire 16 of the packaging bag 11 of FIG.
Details of the cut shape will be described later.

Next, the specific shape of the unsealing guide wire 16 will be described in detail. 5 to 7, FIG. 9, and FIG. 12 show various specific shapes of the unsealing guide wire 16.
Each of the unsealing guide wires 16 is composed of a basic guide wire formed in the central portion and one or two auxiliary guide wires formed above and below the basic guide wire. With these three or five opening guide wires for opening, correction (correction) of deviation (escape) in the tearing direction or guidance of the tearing direction is performed as described below.
It is possible to exert the function of smoothly opening along the line. Therefore, the three-section or five-section unsealing guide wire is regarded as a unit capable of exhibiting the above-mentioned function, and is referred to as a "single row" unsealing guide wire. That is, the "single sequence" is a unit of the unsealing guide wire having at least the correction (correction) of the tearing direction or the guide function, and is 3 in the case shown in FIG. 5 and 5 in the case shown in FIG. The guide wire for opening the strip is called a "single row".

When each guide wire 16 in these figures is provided on the packaging bag 11 shown in FIGS. 1 to 3 and 8,
5 to 7, 9 and 12, the uppermost guide wire for opening (2
2b, 23b, ...) is cut into the perforated base material 15a so that the cut-out piece 21 is located on the 2b, 23b, ...
Further, in this case, a notch or the like is cut in the side edge of the packaging bag 11 corresponding to the left end position of the central basic guide wire 22a, 23a, ... Of the three or five opening guide wires 16. When provided and opened, the basic guide wire 22 in the center from the notch
It is possible to open the package by cutting it in the direction of arrow A along a, 23a, ..., However, it is also possible not to provide a notch.

(1) FIG. 5 (a) (b), FIG. 6 (a)
Regarding the unsealing guide wire 16 shown in (b), FIG. 5 (a) shows the most basic shape of the unsealing guide wire 16 and is composed of a horizontal interrupted straight line perforation formed in the central portion. The basic guide wire 22a and auxiliary guide wires 22b, 22c, each of which is a perforation of a horizontal interrupted straight line, are provided parallel to the basic guide wire 22a with a predetermined distance above and below the basic guide wire 22a. It consists of

FIG. 6 (a) shows a case in which one additional guide wire 22b ', 22c' is provided outside the auxiliary guide wires 22b, 22c of the unsealing guide wire 16 shown in FIG. 5 (a). is there. That is, the basic guide wire 22a consisting of perforations of a horizontal intermittent straight line formed in one line in the central portion, and the basic guide wire 22
Auxiliary guide lines 22b, 22b 'and 2 formed of two perforated horizontal perforated straight lines, which are formed parallel to the basic guide line 22a at a predetermined distance above and below a.
2c and 22c '.

These unsealing guide wires 16 have three strips (see FIG. 5).
(A)) or five perforations (FIG. 6 (a)) form a single row as one unsealing guide wire 16 as a whole. Further, in the unsealing guide wire 16 of FIG. 5 (a) and FIG. 6 (a), the perforations of the basic guide wire 22a and the auxiliary guide wires 22b, 22b ', 22c, 22c' are seen in the vertical direction in the figure. 3 each in the same area (Fig. 5
(A)), or five (FIG. 6A) are arranged, and each three or five perforations are intermittently cut and formed at regular intervals a.

FIG. 5B shows the perforations of FIG. 5A arranged in a zigzag pattern. That is, the basic guide wire 23a consisting of a horizontal perforated straight line formed in the central portion
And auxiliary guide lines 23b and 23c, which are parallel to the basic guide line 23a and are formed at a predetermined distance above and below the basic guide line 23a, and each of which is a perforated line of horizontal intermittent straight lines. And the perforations of the basic guide wire 23a are not cut into the perforations of the auxiliary guide wires 23b and 23c (see FIG. 5).
(B) It is formed in a zigzag shape as a whole so as to be located in the area a '.

6B, the basic guide wire 23a and the auxiliary guide wires 23b and 23c are similar in structure to the guide wire 16 of FIG. 5B, but the outermost auxiliary guide of FIG. Line 23
staggered auxiliary guide wires 23b ', 23 on the outside of b, 23c
c'is further arranged, and the auxiliary guide wire 23
b'and 23c 'are portions of the auxiliary guide wires 23b and 23c which are not cut (range "a" in FIG. 6B) "
It is formed in a staggered pattern as a whole.
That is, a basic guide wire 23a consisting of a single perforated horizontal straight line formed in the central part and a predetermined distance above and below the basic guide wire 23a are formed in parallel with the basic guide wire 23a. Auxiliary guide lines 23b, 23b 'and 23, each of which is composed of two perforated horizontal perforations
c, 23c '. These unsealing guide wires 16 also constitute a single row as one unsealing guide wire 16 as a whole by three perforations (FIG. 5 (b)) or five perforations (FIG. 6 (b)) as in the above. To do.

These unsealing guide wires 16 (see FIG. 5A)
(B), (B) and (B) of FIG. 6 are provided at the positions of the opening guide wires 16 shown in the packaging bag 11 of FIGS. 1 to 3 to open the bags, the basic guide wire 22a. Alternatively, the cut-out piece 21 is linearly cut along the guide line 16 in the direction of arrow A from the left end side of 23a (see arrow b in each figure). At this time, even if the tearing direction shifts to the upper side or the lower side from the perforation direction of the basic guiding line 22a or 23a as shown by the arrows c and d, the auxiliary guidance made of a horizontal interrupted straight line on the upper side or the lower side of the shift direction. Lines 22b, 22c or 23b, 23
Since the perforations of c exist, the guide lines 22b, 22c or 23b, 23c are then guided along the guide line for opening 16 to linearly, smoothly and neatly open. .

In the case of the staggered arrangement shown in FIG. 5B or FIG. 6B, the auxiliary guide wire 23 is provided in a portion (range of a ') where the perforation of the basic guide wire 23a is not formed.
Since the perforations of b and 23c are located, even if the cutting direction is shifted in the directions of arrows c and d,
Make sure that the auxiliary guide wire 23 is a horizontal intermittent straight line in the direction of the deviation.
The perforations of b and 23c are located so that the opening can be performed more smoothly and reliably.

Further, according to the opening guide wire 16 of five lines shown in FIGS. 6 (a) and 6 (b), the auxiliary guide wire 22 is cut in the direction of tearing.
b, 22c or 23b, 23c even further outward (arrows c ', d'direction), further auxiliary guide lines 22b', 22 consisting of outermost horizontal interrupted straight perforations
The cleaving direction can be guided in the direction of the unsealing guide wire 16 (the direction of arrow A) by c ′ or 23b ′, 23c ′, and it is possible to more reliably linearly unseal along the unsealing guide wire 16. It is possible. At this time, FIG.
In the case of the zigzag arrangement shown in (b), as in the case of FIG. 5 (b), the outermost auxiliary guidance is applied to the portions (range "a") where the perforations of the auxiliary guidance lines 23b and 23c are not formed. Since the perforations of the lines 23b 'and 23c' are located, the cutting directions are indicated by arrows c'and d '.
Even if it shifts in the direction, the auxiliary guide wire 23 is surely moved in the shift direction.
b ', 23c' perforations are located,
It can be opened more reliably.

(2) FIG. 5 (c) (2), FIG. 6 (c)
Regarding the unsealing guide wire 16 shown in (2), the unsealing guide wire 16 shown in FIG.
The perforation of the unsealing guide wire 16 is inclined downward by an angle θ (for example, in the range of about 20 degrees to 45 degrees) with respect to the horizontal line, and an inclined and interrupted straight line formed in the central portion. A basic guide wire 24a composed of perforations and a predetermined distance above and below the basic guide wire 24a,
Each one auxiliary guide wire 24b, 2 which is also provided in parallel with the basic guide wire 24a and is formed by perforations of inclined slanted lines.
4c.

The unsealing guide wire 16 shown in FIG. 6C is the auxiliary guiding wire 24b of the unsealing guide wire 16 shown in FIG.
An auxiliary guide wire 24b ', 24c' consisting of a similar perforation of a slanted intermittent straight line is provided outside 24c, or a basic guide wire consisting of a perforated slanted intermittent straight line formed in the central portion. 24a and two auxiliary guide lines 24b, 24b 'each of which is a perforation of a slanted intermittent straight line provided in parallel with the basic guide line 24a at a predetermined distance above and below the basic guide line 24a. And 24c,
24c '.

That is, these three articles (FIG. 5 (c)) or 5
The perforations of the line (FIG. 6C) form a single string as the unsealing guide wire 16 as a whole. Then, the basic guide wire 24a and each auxiliary guide wire 24
The perforations b, 24b ', 24c, and 24c' are three in the same area when viewed in the vertical direction in the figure (Fig. 5 (c)).
Alternatively, five of them (FIG. 6C) are arranged, and three or five perforations are intermittently formed at regular intervals a.

The unsealing guide wire 16 shown in FIG. 5D is the same as the unsealing guide wire 16 shown in FIG. 5C.
5a and the upper auxiliary guide wire 25b have the same configuration, but the configuration of only the lower auxiliary guide wire 25c is inclined upward. That is, only the lowermost auxiliary guide line 25c is angled upward with respect to the horizontal line in the figure by an angle θ (for example, about 2
A perforation of a slanted and interrupted straight line that is slanted (in the range of 0 to 45 degrees), and the arrangement thereof is a portion where the basic guide wire 25a and the upper auxiliary guide wire 25b are not cut (a in FIG. 5D). 'Range) is located in each.

The unsealing guide wire 16 shown in FIG. 6B has the same structure as the unsealing guide wire 16 shown in FIG. 6C, namely, the basic guide wire 25a and the auxiliary guide wires 25b, 25b 'and 25c. However, only the lowermost auxiliary guide line 25c 'is similarly inclined upward with respect to the horizontal line by an angle θ (for example, in the range of about 20 degrees to 45 degrees) to form a perforation line of an inclined discontinuous line, and its arrangement is basically used. Guide wire 25a and auxiliary guide wire 25b, 2
5b 'and 25c where the notch is not formed (see FIG. 6).
(D) range of a ').
The unsealing guide wire 16 shown in FIGS. 5 (d) and 6 (d) is
It is composed of a basic guide wire 25a which is a perforated slanted and interrupted straight line formed in the central portion, and a perforated line which is similarly slanted and interrupted and is provided above and below the basic guide wire 25a with a certain distance. Each one article (Fig. 5 (d)) or each two articles (Fig. 6 (d)) auxiliary guide wire 25b, 25b ',
5c and FIG. 6 in that the unsealing guide wire 16 constitutes a single row.
The basic configuration is the same as that of the unsealing guide wire 16 in (c).

These unsealing guide wires 16 (see FIG. 5C)
(D) and FIG. 6 (c) (d)) are provided as the opening guide wire 16 of the packaging bag 11 shown in FIGS. 1 to 3 to open the bag 11, the basic guide wire 24a or 25a From the left end side, the cut piece 21 is cut substantially linearly in the direction of arrow A along the basic guide wire 24a or 25a (see arrow e in each figure). At this time, even if the tearing direction is deviated from the perforation direction of the basic guiding line 24a or 25a to the upper side or the lower side as shown by the arrows f and g, the auxiliary guiding line of the inclined discontinuous straight line is provided on the upper side or the lower side of the shifting direction. 24b, 24c or 25
Since the perforations of b and 25c are present, after that, the cutting direction is guided by the auxiliary guide lines 24b, 24c or 25b, 25c, and the cutting direction is the direction along the auxiliary guide lines 24b, 24c or 25b, 25c (arrow A Direction), and linear and smooth and clean opening can be performed along the unsealing guide wire 16.

Further, according to the opening guide wire 16 of five lines shown in FIGS. 6C and 6D, the tearing direction is the auxiliary guide wire 24.
b, 24c or 25b, 25c, even if it is further offset in the outward direction (arrow f ', g'directions), the auxiliary guide lines 24b', 24 are formed by perforations of the outermost inclined and intermittent straight line.
The cleaving direction can be guided in the direction of the unsealing guide wire 16 (direction of arrow A) by c ′ or 25b ′, 25c ′, and the unsealing can be carried out more smoothly and reliably along the unsealing guide wire 16. It is a thing.

In the case of the unsealing guide wire 16 shown in FIGS. 5 (d) and 6 (d), the lowermost auxiliary guide wire 25c (see FIG.
(D)) or 25c '(Fig. 6 (d)) is the basic guide wire 2
5a and other auxiliary guide wires 25b or 25b, 25b ',
Position where perforation of 25c does not exist (range a'in the figure)
Therefore, even if the tearing direction is deviated from the basic guide wire 25a in the arrow g direction or the arrow g, g'direction, the auxiliary guide wire 25c at the lowermost portion is surely moved in the deviation direction.
(FIG. 5 (d)) or 25c '(FIG. 6 (d)), in which the perforation is located, and the auxiliary guide line 25c (FIG. 5 (d)) below the basic guide line 25a or 25
c ′ (FIG. 6 (d)) is formed by an inclined interrupted straight line whose end portion P on the unsealing direction side is an inclined interrupted straight line directed toward the direction of the basic guide line 25a and which is inclined upward in the same direction as the direction in which the slitting force acts. (Figs. 9 (a) to 9 (d), Fig. 1)
2 (a) and (b) are the same), the unsealing direction can be guided in the direction of the basic guide wire 25a even if the tearing direction is shifted downward, and the unsealing can be more reliably performed along the unsealing guide wire. Is. Incidentally, the unsealing guide wire 1 shown in FIG.
6 shows an example in which only the lowermost auxiliary guide line 25c 'is inclined upward, but as shown in FIG. 12A, the lowermost auxiliary guide line 25c' is inclined upward and The upper guide wire 25c ″ is inclined upward, and the guide wire 25c ″ is moved to the lowermost guide wire 25c ″.
It can also be located in the same range in the vertical direction as c '.
With this structure, the above-mentioned two upward guide wires 2
By 5c 'and 25c ", the action of guiding the tearing direction in the direction of the basic guide wire 25a can be more reliably generated.

When the packaging bag 11 as described above is to be opened, the cut piece 21 is usually picked up with a finger.
The direction in which the arrow exists, that is, arrow B shown in FIGS. 1 to 3 and 8.
Since the cut piece 21 is cut along the unsealing guide wire 16 while pulling in the direction, the initial tearing is the lowermost auxiliary guide wire 24c, 25c or 24c ', 25c'.
Even when the temperature reaches the limit, the direction of the force for tearing is as shown in Fig. 5 (C).
As shown in (d), FIG. 6 (c), (d), and FIG. 12 (a), since it always acts in the upward direction, that is, in the direction of the cut piece 21 (direction of arrow e), the lower auxiliary guide wires 24c, 25c ( Figure 5
(C) (d)) or 24c ′, 25c ′, 25c ″ (FIG. 6 (c) (d), FIG. 12 (a)) are cut in the upward direction (basic guide lines 24a, 25a direction), Finally, the opening can be smoothly and neatly opened linearly along the unsealing guide wire 16.

FIGS. 9A, 9B and 9C show another embodiment of the unsealing guide wire 16 having the same pattern as the unsealing guide wire 16 shown in FIG. 5D. The one shown in FIG.
5 (d) has substantially the same configuration as the unsealing guide wire, but the tilt angle θ of each tilted intermittent line is 45 degrees,
What is shown in FIG. 9B is the unsealing guide wire 1 of FIG.
Based on 6, the inclination angle θ of each inclined intermittent line is 3
0 degree, and further, the lowermost auxiliary guide line 25c (perforation of the upward sloped intermittent straight line) is formed in the same range (range r) in the vertical direction as the basic guide line 25a and the upper auxiliary guide line 25b, What is shown in FIG. 9C is the inclination angle θ.
Is 30 degrees, and the auxiliary guide wire 25 is a straight line that is intermittently inclined at the top and bottom.
b and 25c are provided in the same range (range r ') in the vertical direction, overlapping portions r "are provided, and the basic guiding line 25a, which is an inclined and intermittent straight line, is shifted in the longitudinal direction with respect to the auxiliary guiding lines 25b and 25c. An overlapping portion r ″ of the basic guide wire 25a and the auxiliary guide wires 25b and 25c is provided.
The basic guide wire 25a is the auxiliary guide wire 25b, 2
It is formed shorter than 5c. Such FIG.
Also in the unsealing guide wire 16 shown in (c), the same action and effect as those of the unsealing guide wire 16 described above can be exhibited.

(3) Regarding the unsealing guide wire 16 shown in FIGS. 7 (a) and 7 (b) FIGS. 7 (a) and 7 (b) show still another embodiment of the unsealing guide wire 16. As shown in FIG. Guide wire 1 for opening shown in FIG.
6 is a basic guide wire 26a which is a continuous straight line (horizontal continuous straight line in FIG. 7) formed in the central portion,
Auxiliary guide lines 26b, 26c, each of which is a perforation of a horizontal interrupted straight line, parallel to the basic guide line 26a and spaced a certain distance above and below the basic guide line 26a.
It consists of That is, the unsealing guide wire 16 shown in FIG. 7A constitutes a single line as one unsealing guide wire 16 as a whole by these three perforations or cut lines.

The unsealing guide wire 16 is provided at the position of the unsealing guide wire 16 of the packaging bag 11 shown in FIGS. 1 to 3, and when the packaging bag 11 is unsealed, the unsealing guide wire 16 is moved along the basic guiding wire 26a. Cut the above-mentioned cutting piece 21 in the direction of arrow A,
At this time, the cutting direction is upward or downward (arrow j, k direction)
Even if it is deviated to, since the auxiliary guide lines 26b and 26c composed of the perforations of the horizontal interrupted straight line are present at the upper position or the lower position, the tearing direction is corrected to the direction along the unsealing guide line 16 (arrow A direction). Then, it is possible to linearly open smoothly and neatly.

The unsealing guide wire 16 shown in FIG. 7B is the auxiliary guiding wire 2 of the three unsealing guide wires 16 shown in FIG.
Auxiliary guide lines 26b 'and 26c' made of perforations of horizontal interrupted straight lines are further cut and formed on the outer sides of 6a and 26c to form five threads as a whole. That is, FIG. 7 (b)
In the unsealing guide wire 16, the central guide line (horizontal continuous straight line in FIG. 7) is used as the basic guide wire 26a, and the auxiliary guide wire is a perforated line which is a horizontal interrupted straight line. Guide wires 26b, 26b ', 26c, 26
Two claws are provided above and below the basic guide wire 26a, and the unsealing guide wire 16 also has five perforations as a single-row unsealing guide wire 16.

With this configuration, the basic guide wire 26a
And the auxiliary guide lines 26b and 26c, the above-mentioned FIG.
The same action and effect can be obtained, and at the same time, even if the tearing direction is further deviated from the auxiliary guide lines 26b and 26c in the outer direction (arrow j'and k'directions), from the perforation of the outermost horizontal interrupted straight line. Auxiliary guide wires 26b ', 26c'
The tearing direction by the direction of the unsealing guide wire 16 (arrow A
Direction), and can be more surely linearly opened along the unsealing guide wire 16. Further, when opening along the continuous straight line (26a), the resistance to tearing is reduced as compared with the intermittent straight line,
In addition, the unsealing guide wire consisting of a continuous straight line can be cut more linearly as compared with the conventional deformed perforations and the like, and a shift (runout) in the tearing direction is less likely to occur than a discontinuous line. Therefore, when the unsealing guide wire 16 is configured as a combination of an interrupted straight line and a continuous straight line, the unsealing guide wire 16 can be opened more smoothly than an unsealed guide wire consisting of only the interrupted straight line.

The packaging bag 11 is formed by forming the unsealing guide wire 16 on the outermost perforated base material 15a and then bonding the inner films 15b and 15c to the base material 15a. At this time, if all the unsealing guide wires 16 (three or five threads) are continuous straight lines, the film is divided into thin strip-shaped portions along the guide wire direction, and the outermost film 15a and the inner film 15b. , 15c in the process of bonding, the divided strip-shaped portions may be displaced in the horizontal direction to cause overlap along the score line. However, Fig. 7 (a) (b)
As shown in Fig. 4, since the continuous straight line (26a etc.) is composed of only one basic guide wire, a thin strip-shaped portion is not formed. By using a combination of auxiliary guide wires, it is possible to obtain the effect of preventing the cut lines from overlapping in the manufacturing process of the packaging bag.

The unsealing guide wire 16 shown in FIG. 9 (d) shows another embodiment of the unsealing guide wire 16 shown in FIG. 7 (a), and the basic guide wire 26a is shown in FIG. Similarly to the above), the auxiliary guide lines 26b "and 26c" are constituted by perforations of inclined and interrupted straight lines extending in the direction of the basic guide line 26a. The unsealing guide wire 16 shown in FIG.
Two auxiliary guide wires 26b ″ and 26c ″ shown in (d) are provided above and below the basic guide wire 26a. With this configuration, the same action and effect as the unsealing guide wire 16 shown in FIGS. 7A and 7B, that is, the basic guide wire 26.
Since a is a straight line, there is little ripping resistance, and the effect that the ripping direction is unlikely to occur can be exhibited, and when the ripping direction deviates upward or downward from the basic guide line 26a (arrows j, k directions, FIG. In the case of 12 (b), further in the j ', k'directions), the auxiliary guide lines 26b ", 2
6c "is always directed toward the basic guiding line 26a, so that the deviation in the upward or downward tearing direction from the basic guiding line 26a can always be corrected in the basic guiding line 26a direction for more reliable and smooth opening. It can be opened along the guide wire 16.

The packaging bag 11 provided with the various types of unsealing guide wires described above is the unsealing guide wire 16 of any one of the above.
The pair of front and back packaging base materials 12 and 13 thus formed are bonded to each other so that the front and back unsealing guide wires 16 are superposed. At this time, the front and back unsealing guide wires 16 are Even if the position is slightly deviated in the horizontal direction, since the unsealing guide wire 16 itself is composed of three to five notches, these single-row unsealing guide wires 1
According to 6, the effect of absorbing the deviation between the front and back can be exhibited.

(4) Regarding the unsealing guide wire 16 shown in FIG. 8, another embodiment of the unsealing guide wire 16 will be described with reference to FIG. What is shown in the figure is the unsealing guide wire 16
Is a combination of a straight line and a curved line, and the curved direction of the curved line is opposite to that of the front side packaging base material 12 and the back side packaging base material 13. For the sake of convenience of explanation, the unsealing guide wire 16 is shown by a straight line and a broken line, but the concrete shape of the guide wire 16 is various as shown in FIGS. 5 to 7, 9 and 12. Any of the unsealing guide wire 16 having the above shape may be applied, and the unsealing guide wire 16 having various shapes is cut and formed along the straight portion and the curved portion of the unsealing guide wire 16 shown in FIG. It is a thing.

The notch forming position of the unsealing guide wire 16 is from the one side edge portion of the left side 19 of the packaging bag 11 to the right side 2.
Although it is formed by cutting to the other side edge portion of 0, the front surface side packaging base material 12 is provided with a straight line portion 16a which is formed by linearly cutting horizontally from one side edge portion of the left side 19, and the straight line portion 16a is formed. Is provided with a curved portion 16b which is formed by cutting in a downward curved line continuously, and the curved linear portion 16b is continuously connected to the curved portion 16b and horizontally at the same level position as the linear portion 16a.
A'a 'is formed by cutting over the other side edge (right side 20) of the front and back, and in the back side packaging base material 13, a curve formed by cutting a linear line upward in a continuous manner with the straight portion 16a'. The portion 16b 'is provided, and the straight portion 16a' is provided on one side edge portion (left side 19) of the back surface continuously with the curved portion 16b '.
The straight line portion 16a ″ is provided horizontally at the same level position as in FIG.

That is, the unsealing guide wire 16 of the front side packaging base material 12 and the unsealing guide wire 16 of the back side packaging base material 13 described above.
Is a straight opening guide wire (straight part 16
a, 16a ″, and 16a ′), and
The curved portion 16b at the central portion of the guide wire 16 of the front surface side packaging base material 12 has straight portions 16a and 16a 'at both end positions.
Is continuously formed in a downward curved line shape, and the curved portion 16b ′ at the central portion of the guide wire 16 of the back side packaging base material 13 is
The above-mentioned linear unsealing guide wires 16a ′, 16 at both end positions
a "is continuously formed in an upward curved line in the opposite direction to the unsealing guide wire 16b. The unsealing guide wire 16 shown in FIGS. When applied to the curved portions 16b and 16b ′ of the above, the individual cut lines (horizontal intermittent straight line, inclined intermittent straight line) are curved portions 16b and 16b.
Along the line b ′, the direction is gradually changed to form a curved line as a whole (FIG. 10A).
(See (b)). Further, in the case of the perforations of the above horizontal interrupted straight line, the individual interrupted straight lines are not horizontal by arranging along the curved line as shown in FIG. 10A, but the individual perforated lines shown in FIG. Is also included in the horizontal intermittent straight line. Further, the cut line of the continuous straight line in FIG. 7 is formed as a continuous straight line along the curved portions 16b and 16b ′ so as to form a curved line (see FIG. 10C).

When the packaging bag 11 is to be opened, the cut-out piece 21 on the upper side of the packaging bag 16 is picked up with a finger and indicated by an arrow A.
The cut piece 21 is cut along the unsealing guide wire 16 while being pulled in the direction. At this time, the linear portion 16
Since the front and back of the unsealing guide wire 16 of a and 16a ″ are overlapped, the unsealing guide wire 16 of the curved portions 16b and 16b ′ is linearly cut at the same position on the front and back sides.
b, 16b 'when reaching the unsealing guide wire, the front side packaging base material 12 side extends along the curved portion 16b along the straight line portion 16b.
It is continuously torn in the direction of arrow p (downwardly curved line shape) from a, and the back side packaging base material 13 side is continuously along the curved portion 16b ′ from the straight portion 16a ″ in the direction of arrow q (upward bay). The curved part 16
b, 16b ', it is continuously guided to each straight line portion 16a' in the front and back overlapping position, and linearly cut at the same position on the front and back along the straight line portion 16a ', and finally the cut piece 21 is removed. When cut out, the upper portion of the back side packaging base material 13 is left as the opening flap 13 '(FIG. 8).
(See (c)). Therefore, it is possible to easily open the cut-out opening by putting a finger on the flap 13 'and take out the contents.

In the process of cutting, the curved portions 16b and 16b 'of the opening guide wire 16 of the front and back side packaging base materials 12 and 13 are straight portions 16a of the opening guide wire 16 at both ends. 16a ′, 16a ″, and the straight portions 16a of the unsealing guide wire 16 at both ends.
Since 16a 'and 16a "are provided at the front and back superposition positions, the routes of the unsealing guide wire 16 on the front side and the unsealing guide wire 16 on the back side are in the vertical direction (arrows p and q directions) during the unsealing. Even if it is divided into
b and 16b 'can be smoothly and continuously cut into both sides, and even at the end portion of the unsealing guide wire 16, the curved portions 16b and 16b' can be used to straighten the front and back portions.
Since the route is continuous to a'and the straight part 16a 'is at the front and back overlapping position, it is possible to smoothly and continuously cut both the front and back from the curved parts 16b, 16b' to both straight parts 16a '. Clean the guide wire for opening 16
It can be opened along with. In the embodiment of FIG. 8 described above, the front surface side is the downward curved line and the back surface side is the upward curved line, but the curved direction may be the front surface side upward and the back surface side downward. Further, as shown in FIG. 11, two or more curved portions may be provided on the front and back packaging base materials 12 and 13.

(5) Method of forming the unsealing guide wire on the packaging base material Next, the method of forming the unsealing guide wire shown in FIGS. 5 to 7 and 9 will be described. The unsealing guide wire 16 is cut and formed in the film F (perforated base material 15a) as a packaging base material using a gravure printing machine 30 as shown in FIG. The gravure printing machine 30 itself is a known printing machine for five-color printing consisting of five printing units 31, and each printing unit 31 forms a recess for a plate on the peripheral surface as shown in FIG. Plate cylinder 32 and impression cylinder 3 pressed against it
3, the ink in the pan 34 is filled in the concave portion of the plate cylinder 32, and printing is performed on the film surface P sent in the direction of the arrow N by the impression cylinder 33. In such a multi-color gravure printing machine 30, a known highly accurate registration device is used to match the printing positions of the respective colors. This registering device constantly monitors a scanning head 35, which is a photoelectric converter, for the deviation of the vertical and horizontal positions of the printing positions of the respective colors on the film surface P (for example, the registration marks printed on the film surface by a printing machine of the respective colors), Control unit 37
On the basis of the signal from the head 35,
The vertical shift amount of the registration mark detected in step S1 is detected, and the compensator roller 36 is driven by the drive motor M based on the detection amount.
1, the vertical direction (arrows S and T directions) is driven to correct the misalignment in the film longitudinal direction (film longitudinal direction), and the control section 37 also detects the head based on the signal from the head 35. The lateral shift amount of the registered register is detected, and based on the detection, the driving motor M2 drives the plate cylinder 32 laterally (perpendicular to the paper surface of FIG. 14) to shift the lateral direction of the film. It's fixed.
The registration finish accuracy of such registration is generally suppressed to within ± 0.1 mm. Incidentally, FIG.
The middle PG is a pulse generator, which generates a reference pulse signal for detecting the shift amount of the register mark in the control unit 37.

In the unsealing guide wire 16 of the present invention, the unsealing guide wire forming portion 31 'is the final printing portion 31 of the gravure printing machine.
To use as. That is, the guide wire forming blades 40 to 42 for opening are formed on the outer peripheral surface of the plate cylinder 32 of the forming portion 31 '(FIG.
(C) is provided. The forming blade is the plate cylinder 32.
Is provided so as to protrude in the radial direction from the outer peripheral surface of the. Then, the film F as a packaging base material is passed between the plate cylinder 32 and the plate cylinder 32 that is in pressure contact with the plate cylinder 32,
The opening guide wire is cut and formed in the film F at a constant pitch based on the rotation of 2. Reference numeral 40 denotes a lateral blade for forming an unsealing guide wire in the lateral direction of the film, which is provided on the outer periphery of the plate cylinder 32 in the axial direction of the plate cylinder (see FIG. 15A). The horizontal hole blade 40 forms the unsealing guide wire 16 shown in FIG. Reference numeral 41 is a vertical blade for forming an unsealing guide wire parallel to the longitudinal direction of the film, and is provided along the outer peripheral direction of the plate cylinder 32 (see FIG. 15B). The vertical blade 41 forms the unsealing guide wire 16 shown in FIG. Reference numeral 42 denotes an inclined blade for obliquely forming the unsealing guide wire in the corner portion of the film, which is provided on the outer peripheral surface of the plate cylinder 32 in the inclined direction (see FIG. 15C). The inclined blade 42
Is for forming the unsealing guide wire 16 shown in FIG. Incidentally, the shape of the forming blades 40 to 42 is shown as an example corresponding to FIG. 7 (a) consisting of a continuous straight basic guiding wire and an intermittent straight auxiliary guiding wire.
The shape of 2 corresponds to each of the unsealing guide wires 16 so that a cut line of each of the other unsealing guide wires can be formed. Therefore, when the plate cylinder 32 is rotated, the forming blades 40 to 42 provided on the plate cylinder 32 are pressed against the film F, so that the film F is opened in the final step of multicolor gravure printing. 16 are cut and formed at a constant pitch. The guide wire forming portion 31 ′ is not used to form a plate recess on the surface of the plate cylinder 32, and the ink pan 34 is removed to be used exclusively for forming the unsealing guide wire 16. It is a thing.

Thus, the guide wire forming blade 40 for opening is formed on the outer peripheral surface of the plate cylinder 32 of the final printing section 31 of the gravure printing machine 30.
Or 42 are provided, and the unsealing guide wires 16 are formed at a constant pitch on the film F by the rotation of the plate cylinder 32, so that the gravure printing machine 30 has an extremely high accuracy (±
The opening guide wire 16 can be cut and formed in the film F at a constant pitch of 0.1 mm). Then, the film F in which the unsealing guide wire 16 is cut and formed in this manner is cut at a constant length, and a pair of films are opposed to each other and the periphery is sealed to form the packaging bag 11. Is.

In this case, since the cutting position accuracy of the unsealing guide wire 16 is extremely high, the unsealing guide wire 16 of the front side packaging base material 12 and the unsealing guide wire 16 of the back side packaging base material 13 are extremely high. It can be polymerized with positional accuracy.
Therefore, the horizontal deviation of the unsealing guide wire 16 on the front and back of the packaging bag 11 can be made extremely small, whereby a minimum number of unsealing guide wires 16 (for example, three) can be formed in a single row. A packaging bag 1 that can be opened smoothly and securely even if there is one
1 can be realized.

Further, the front and back unsealing guide wires 16 can be polymerized with extremely high accuracy, and the front and rear unsealing guide wires 1 can be superposed.
Since the horizontal deviation of 6 can be reduced, a packaging bag that can be smoothly and reliably opened even if the cut line itself is a single-line unsealing guide wire having the simple shape described above is realized. It is possible.

As a device for forming the perforations in the vertical direction shown in FIG. 15B, the structure shown in FIG. 17 (perforation forming device 50) may be used. 32 'in the figure
Is a cylindrical receiving roller, and the receiving roller 32 'is not provided with the unsealing guide wire forming blade,
A disc-shaped rotary blade 45 of an unsealing guide wire is rotatably supported by a support portion 46 on the upper portion of 2'and the support portion 46 is attached to the cylinder 4
It is attached to the lower end of 7 to enable the rotary blade 45 to move up and down (directions of arrows S and T). Further, the cylinder 47 is slidably supported in the left-right direction (arrows U and V directions) along a rail 48 parallel to the receiving roller 32 '.

The perforation forming device 50 having such a configuration may be provided so that the disk-shaped rotary blade 45 is located so as to face the upper surface of the plate cylinder 32 of FIG. 14, or as shown in FIG. The device 50 including the receiving roller 32 ′ and the disc-shaped rotary blade 45 is installed between the final printing unit 31 and the winding roll unit 49 of the gravure printing machine 30 (that is, before the winding roll unit 49). The film F may be wound between the receiving roller 32 ′ and the rotary blade 45 by the winding roll section 49. On the outer peripheral surface (outer peripheral surface) of the disc-shaped rotary blade 45, a forming guide wire 45a for unsealing guide wire corresponding to perforations is formed in a protruding state in the outer peripheral direction, as shown in FIG.
While the film F is passing over the roller 32 ′, the cylinder 47 is intermittently driven downward to bring the rotary blade 45 into contact with the film F for a certain period of time so that the film F is moved in the longitudinal direction. The unsealing guide wire (unsealing guide wire 16 shown in FIG. 1) can be formed at a constant pitch. The formation position of the unsealing guide wire can be adjusted by moving the disk-shaped rotary blade 45 in the left-right direction along the rail 48. According to this structure, the unsealing guide wire 16 can be formed at an accurate position while maintaining the accurate positioning control function of the film F in the gravure printing machine 30 (for example, the feed control amount in the longitudinal direction of the film). it can. In addition, FIG.
It is possible to eliminate the influence of the positional deviation due to the seam on the outer periphery of the plate cylinder of the forming blade 41 provided on the outer periphery of the plate cylinder 32 in (b).

As described above, according to the present embodiment, by constructing the unsealing guide wire 16 from one basic guide wire and one or two auxiliary guide wires provided above and below the basic guide wire, the minimum necessary guide wire is formed. With a single-row opening guide wire having the number of lines (3 lines or 5 lines), it is possible to realize a packaging bag that can be opened smoothly and reliably.

With such a construction, the unsealing guide wire 16 is a perforation line of a horizontal interrupted straight line, an inclined interrupted straight line, or a combination of these guide wires and a continuous straight line, that is, each cut line itself is It can be configured with only the simplest horizontal or inclined single straight line, and as in the past, each cut line itself is a combination of straight lines facing multiple directions, or a complex shape deformation due to a combination of curves and straight lines, etc. There is no need to use perforations, nor is there any need for a blade die for forming complex deformed perforations. In addition, by combining the above basic guide wire and auxiliary guide wire, a very simple perforated shape (horizontal intermittent straight line or inclined intermittent straight line),
Alternatively, by combining these with a continuous straight score line, it is possible to realize a packaging bag that can be opened smoothly and reliably with a single line of unfolding guide lines, and it is necessary to form multiple rows of deformed perforations as in the conventional case. There is no. Therefore, the strength of the portion where the unsealing guide wire is formed does not decrease.

Further, by arranging the unsealing guide wires 16 consisting of three or five interrupted straight lines in a zigzag arrangement, it is possible to more reliably correct the deviation in the tearing direction.

Further, by constructing the unsealing guide wire 16 by a horizontal interrupted straight line or a combination of a slanted interrupted straight line and a continuous straight line, it is possible to reduce the resistance at the time of unsealing and open more straightly and smoothly. A packaging bag can be realized.

In addition, among the three or five opening guide wires 16 for unsealing, the inclined and interrupted straight lines 25c, 25c ', 2 located below
By sloping the inclination direction of 5c "or the like in the direction of the basic guide line, the tearing direction can be guided in the direction of the basic guide line, and the packaging bag that can be opened more reliably along the guide line for opening Can be realized.

Further, the curved portions 16b, 16b 'of the unsealing guide wire 16 capable of forming the unsealing flap 13' are overlapped with the linear portions 16a, 16a ', 16 at both end positions.
Since it is continuously provided from "a", even if the curved portions 16b and 16b 'of the front side packaging base material 12 and the back side packaging base material 13 have different curving directions, the front and back sides can be smoothly opened from the straight portion. In combination with the effect of the unsealing guide wire composed of the basic guiding wire and the auxiliary guiding wire, it is possible to realize a packaging bag with an unsealing flap that can be unsealed extremely smoothly and reliably.

Further, since the unsealing guide wire 16 is cut and formed in the packaging base material by using the gravure printing machine 30, the unsealing guide wire 16 can be formed with extremely high accuracy of the gravure printing machine 30. In the case where the packaging bag 11 is formed by pasting the packaging base materials together, it is possible to superimpose the opening guide wire 16 on the front and back with extremely high positional accuracy, and to shift the guide wire on the front and back in the horizontal direction. It can be reduced. As a result, it is possible to realize a packaging bag in which each cut line itself has a simple shape, and even if the unsealing guide wire 16 has a small number of lines (for example, three lines), it can be smoothly and surely opened. That is, unlike the conventional case, it is not necessary to provide a plurality of rows of deformed perforations, and correction (correction) of the tearing direction is performed.
It is possible to realize a packaging bag that can be smoothly and surely opened by using a single-row (3 or 5) opening guide wire having a guiding function.

By forming the opening guide wire 16 by cutting using the gravure printing machine 30, it is possible to form the guide wire 16 with high positional accuracy, and it is necessary to separately provide an opening guide wire forming device. Since it does not exist, the effect that the manufacturing cost of the packaging film can be reduced can be obtained.

The size of each cut line of the unsealing guide wire 16 described above is, for example, a width of one perforation consisting of a horizontal interrupted straight line or an inclined interrupted straight line is 0.3 mm.
Approximately 5 mm, the vertical spacing between the unsealing guide wires of each strip is approximately 0.5 mm to 2 mm, and in the case of three strips, it is preferable that the entire unsealing guide wire 16 is formed to have a vertical width of approximately 5 mm. . Further, in the packaging bag of the present invention, the lengths of the individual cut lines themselves of the unsealing conducting wire 16 of FIGS. 5 to 7, 9 and 12 described above, the intermittent distance of each cut line, and the vertical direction of each line. It is needless to say that various intervals, inclination angles, etc. can be set, and the same unsealing guide wire 16 may be provided with cut lines having different sizes. The present invention includes various embodiments such as being provided by changing them at regular intervals.

[0083]

As described above, according to the present invention, by forming the unsealing guiding wire from the basic guiding wire and the auxiliary guiding wires provided above and below the basic guiding wire, the unsealing guiding wire having a small number of lines can be used. This makes it possible to realize a packaging bag that can be opened reliably and smoothly.

Further, a simple score line (for example, a horizontal interrupted straight line,
Alternatively, a wrapping bag that can be opened smoothly and surely can be realized by a single row of unsealing guide wires composed of an inclined intermittent line or the like) or a combination of these and continuous lines.

Further, since the opening guide wire for opening the flap, which is in the form of a curved line, is continuously provided from both end positions on both the front and back sides, even if the bending directions of the front side and the back side are different, both end positions are different. Thus, it is possible to realize a packaging bag with an opening flap that can be opened smoothly from the above and can be opened smoothly and surely.

Further, by forming the unsealing guide wire with the unsealing guide wire forming blade provided on the plate cylinder of the gravure printing machine or the like, the unsealing guide wire can be formed with high positional accuracy on the packaging base material. It is possible to realize a packaging bag that can be reliably and smoothly opened with a single-row opening guide wire.

[Brief description of drawings]

FIG. 1A is a front view of a packaging bag according to the present invention,
(B) is a development view of the bag.

FIG. 2 is a front view of the same packaging bag.

FIG. 3 is a front view of the same packaging bag.

FIG. 4 is a cross-sectional view of a front surface side or a back surface side packaging base material of the same packaging bag.

5 (a) to 5 (d) are views showing the shapes of various embodiments of the three opening guide wires of the same packaging bag.

FIGS. 6 (a) to 6 (d) are views showing the shapes of various embodiments of the opening guide wire for opening the five articles of the packaging bag.

7 (a) and 7 (b) are views showing the shape of the embodiment of the opening guide wire for opening three or five lines of the same packaging bag.

8A is a front view of the same packaging bag, FIG. 8B is a development view of the same bag, and FIG. 8C is a front view showing an opened state of the same bag.

9A to 9D are views showing another embodiment of the unsealing guide wire of the same packaging bag.

10 (a) to 10 (c) are diagrams showing cases where various opening guide wires are applied to the bending portion.

FIG. 11 is a partially omitted front view of the packaging bag, showing the other embodiment of the unsealing guide wire.

12 (a) and (b) are views showing another embodiment of the unsealing guide wire.

FIG. 13 is a side view of the gravure printing machine showing the overall shape thereof.

FIG. 14 is a side view showing a portion for forming an unsealing guide wire using the same printing machine.

15 (a) to 15 (c) are front views of the plate cylinder showing the unsealing guide wire forming blade installed in the plate cylinder of the same printing machine.

16 (a) to 16 (e) are cross-sectional views of the front side or back side packaging base material of the same packaging bag.

FIG. 17 is a front view of the vicinity of a receiving roll of the perforation forming device.

FIG. 18 is a front view of a disk-shaped rotary blade.

FIG. 19 is a side view of the perforation forming apparatus incorporated into the gravure printing machine.

FIG. 20 is a view showing a guide wire for opening a conventional packaging bag.

FIG. 21A and FIG. 21B are diagrams showing a conventional unsealing guide wire.

[Explanation of symbols]

11 packaging bags 12 Surface side packaging base material 13 Backside packaging base material 14 rim 15a Perforated base material 16 Guide wire for opening 16b, 16b 'curved portion 17 Bottom 18 upper side 19 Left side 20 right side 22a-26a Basic guide wire 22b-26b Auxiliary guide wire 22c-26c Auxiliary guide wire 22b'-26b 'auxiliary guide wire 22c'-26c 'auxiliary guide wire 26b ", 26c" auxiliary guide wire 30 gravure printing machine 32 plate body 32 'receiving roll 33 impression cylinder 40 to 42 Guide wire forming blade for opening 45 disc-shaped rotary blade F film

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3E064 AA01 AA11 AB23 BA17 BA21                       BB03 BC08 BC18 EA30 HN06                       HP02                 3E067 BA12A BB14A BC03A EA06                       EA22 EB03 EB06 EB17 EE02                       FA01 FC01                 3E075 BA42 BA47 BA70 CA02 DA03                       DA04 DA05 DA14 DA33 DB02                       DB07 DB19 DE14 DE23 GA02

Claims (12)

[Claims] 1. One side packaging base material and the other side packaging base material are opposed to each other and their peripheral edges are hermetically sealed, and each side of the one side packaging base material and the other side packaging base material corresponds. In the packaging bag in which the opening guide wire is provided at each position, the opening guide wire includes one basic guide wire extending from one side edge portion to the other side edge portion of the base material and the basic guide wire. The auxiliary guide wire is provided along the basic guide wire at an upper position and a lower position, the basic guide wire is a continuous straight line, and the auxiliary guide wire is a perforation line formed of an intermittent straight line. A packaging bag to do. 2. One side packaging base material and the other side packaging base material are made to face each other and their peripheral edges are hermetically sealed, and each side of the one side packaging base material and the other side packaging base material corresponds. In the packaging bag in which the opening guide wire is provided at each position, the opening guide wire includes one basic guide wire extending from one side edge portion to the other side edge portion of the base material and the basic guide wire. It consists of an auxiliary guide wire provided along the basic guide wire at an upper position and a lower position, the basic guide wire is an inclined intermittent straight line, and the upper auxiliary guide wire is inclined in the same direction as the basic guide wire. It is an inclined intermittent straight line, characterized in that the end of the auxiliary guiding line on the lower side or at least the lowermost auxiliary guiding line in the unsealing direction is an inclined intermittent straight line extending in the direction of the basic guiding line. A packaging bag to do. 3. One side packaging base material and the other side packaging base material are opposed to each other and their peripheral edges are hermetically sealed, and each side of the one side packaging base material and the other side packaging base material corresponds. In the packaging bag in which the opening guide wire is provided at each position, the opening guide wire includes one basic guide wire extending from one side edge portion of the base material to the other side edge portion, and At the upper position and the lower position, consisting of an auxiliary guide wire provided along the basic guide wire, the basic guide wire and the auxiliary guide wire are intermittent straight lines,
A packaging bag in which these basic guide wires and auxiliary guide wires are arranged in a zigzag pattern. 4. The basic guiding wire as one line, and the auxiliary guiding line is provided above and below the basic guiding line as one line, respectively. Packaging bag. 5. The method according to claim 1, wherein the basic guide wire is one piece, and the auxiliary guide wires are provided in two pieces above and below the basic guide wire, respectively. Packaging bag. 6. The unsealing guide wire of the one-side packaging base material and the unsealing guide wire of the other-side packaging base material are polymerized at both end positions thereof, and the leading wire of the one-side packing base material is The guide wire of the other side packaging base material is continuously formed downward or upward from the both end positions, and the guide wire of the other side packaging base material is continuously upwardly or downwardly directed in the opposite direction to the curved line from the both end positions. The packaging bag according to claim 1, wherein the packaging bag is formed in a curved shape. 7. The unsealing guide wire is provided with an unsealing guide wire forming blade on the outer peripheral surface of the plate cylinder of a gravure printing machine, and the packaging base material is passed between the pressure cylinder press-contacted to the plate cylinder and the plate cylinder. The packaging bag according to any one of claims 1 to 6, wherein the packaging base material is cut and formed based on the rotation of the plate cylinder. 8. The disc-shaped rotary blade, wherein the unsealing guide wire is provided with a receiving roller for a packaging base material in a front stage of a take-up roll section of a gravure printing machine and an outer peripheral surface provided with an unsealing guide wire forming blade. Is disposed so as to face the receiving roller, and the disc-shaped rotary blade is brought into contact with a packaging base material passing through the upper surface of the receiving roller to form a notch in the packaging base material. The packaging bag according to any one of 1 to 6. 9. A structure of an unsealing guide wire for a packaging bag formed by cutting on a packaging base material, wherein the unsealing guide wire is one basic guide formed by cutting on the surface of the packaging base material. A guide wire and auxiliary guide wires formed above and below the basic guide wire by cutting along the basic guide wire. The guide wire for opening is the guide wire on the outer peripheral surface of the plate cylinder of the gravure printing machine. A guide wire forming blade for opening the wire is installed, and the packaging base material is passed between the plate cylinder and the impression cylinder that is in pressure contact with the plate cylinder, and a cut is formed in the packaging base material based on the rotation of the plate cylinder. A structure of an unsealing guide wire used for a packaging bag, which is characterized by being a thing. 10. A structure of an unfolding guide wire for a packaging bag, which is cut and formed in a packaging base material, wherein the unsealing guide wire is one basic guide formed by being cut into the surface of the packaging base material. A guide wire and an auxiliary guide wire formed above and below the basic guide wire by cutting along the basic guide wire, wherein the unsealing guide wire is provided in the preceding stage of the winding roll section of the gravure printing machine. A disc-shaped rotary blade having a packaging base receiving roller and an opening guide wire forming blade on the outer peripheral surface is arranged to face the receiving roller, and passes through the disc-shaped rotary blade receiving roller upper surface. A structure of an unsealing guide wire used in a packaging bag, characterized in that the packaging base material is cut and formed by being brought into contact with the packaging base material. 11. The unsealing guide used for the packaging bag according to claim 9, wherein the basic guide wire is a continuous straight line, and the auxiliary guide wire is a perforated line formed by a discontinuous straight line. Line structure. 12. The structure of the unsealing guide wire used in the packaging bag according to claim 9 or 10, wherein the basic guide wire and the auxiliary guide wire are perforated in the form of intermittent straight lines.