JPH07223652A - Packaging bag, and method for producing package using the bag - Google Patents

Abstract

PURPOSE:To make an opening of a packaging bag openable easily when articles are inserted into the bag on packaging, to make a number of packaging bags piled up in layers separable easily from one another, and to make production of packaged bodies executable efficiently, using such packaging bags. CONSTITUTION:In a packaging bag 1 with an opening 5 provided on one end of its surface film 2 and reverse side film 3 and with the other end of the films stuck together for forming a sealed-up part, at least one or more protuberances are provided either to the inside 2a of the surface film 2 or the inside 3a of the reverse side film 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag for packaging foods such as sandwiches or rice balls, or other articles, more specifically for packaging in which a synthetic resin film such as vinyl or paper is formed into a bag shape. The present invention relates to a bag and a method for producing a package in which articles are packaged using the packaging bag.

[0002]

2. Description of the Related Art Conventionally, when a package is manufactured by using the above packaging bag, the package is formed in a bag shape which conforms to a predetermined shape of the article and has an opening into which the article is inserted. A method is used in which a large number of bags are stacked in advance, air is blown into the opening to open the opening, and an article is inserted and packaged. Also, after peeling the stacked packaging bags one by one by suction, open the opening,
There is also a method of inserting and packaging the article.

[0003]

However, in the case of manufacturing a package using the packaging bag as described above, since the packaging bags are laminated and the packaging bags are in close contact with each other, the opening Is difficult to open, and the peeling property between the packaging bags is poor. In particular, when the packaging bag is a film made of synthetic resin, it is more difficult to open due to the self-adhesiveness of the synthetic resin film and film characteristics such as generation of static electricity, and their peeling property is also poor. That is, the opening work of the opening and the peeling work of the packaging bag become very complicated, which causes a decrease in the packaging work efficiency.

The present invention has been made in view of the conventional problems as described above, and an opening for inserting an article can be easily opened, and a plurality of packaging bags can be easily stacked. While providing a packaging bag that can be peeled off,
An object of the present invention is to provide a method for manufacturing a package that enables efficient production of a package using the packaging bag.

[0005]

[Means for Solving the Problems] The technical means taken by the present invention to solve the above problems is in a packaging bag, which has an opening 5 at one end of a front film 2 and a back film 3. The packaging bag 1 having the other end closed and the sealing portion 4 formed
In this case, at least one projection 8 is provided on at least either the inner surface side 2a of the front film 2 or the inner surface side 3a of the back film 3.

Further, the front film 2 and the back film 3 have an opening 5 at one end, and the other end is closed to form a sealing portion.
In the packaging bag 1 in which 1a is formed, at least one projecting portion 13 is provided on at least either the outer surface side 2b of the front film 2 or the outer surface side 3b of the back film 3. . It should be noted that embossing is used as an example of providing the protrusions 8 and 13.

Further, the first technical means in the method for producing a package using the packaging bag 1 is the front film 2
And the back film 3 has an opening 5 at one end and the other end is closed to form a sealing portion 1a, and at least the inner surface 2a of the front film 2 or the inner surface of the back film 3 3a
Air is sent into the opening 5 of the packaging bag 1 in which at least one or more protrusions 8 are provided to open the opening 5, and the article is inserted through the opening 5. After that, the opening 5 is sealed to produce a package.

The second technical means in the method for producing a package using the packaging bag 1 has an opening 5 at one end of the front film 2 and the back film 3, Further, the other end is closed to form a sealing portion 1a, and at least one projecting portion 13 is provided on at least either the outer surface side 2b of the front film 2 or the outer surface side 3b of the back film 3. A plurality of packaging bags 1 are laminated to form a laminate 10, and the surface side of the laminate 10 is sucked to separate the packaging bags 1 one by one from the laminate 10 to form the package 10. Bag
The purpose is to manufacture a package by opening the first opening 5, inserting an article through the opening 5, and then closing the opening 5.

[0009]

In the packaging bag 1 of the present invention, at least one or more protrusions 8 are provided on at least either the inner surface side 2a of the front film 2 or the inner surface side 3a of the back film 3.
In the opening 5, that is, between the inner surface side 2a of the front film 2, the inner surface side 3a of the back film 3, and the protruding portion 8, a gap portion (a non-adhering portion between the film inner surface sides) is formed, When the air is forcedly blown into the opening 5 of the packaging bag 1,
Since air will enter the gap portion, the front film 2 and the back film 3 can be easily and reliably peeled off, that is, the opening portion 5 can be easily opened.

At least the surface film of the packaging bag 1
In the case where at least one or more protrusions 13 are provided by embossing on either the outer surface side 2b of 2 or the outer surface side 3b of the back film 3, a concave shape is provided on the opposite surface of the protruding portion 13. Department,
That is, at least the inner surface 2a of the front film 2 or the back film 3
Since a concave portion is formed on the inner surface side 3a of the above, a gap portion is formed within the opening portion 5, and when a plurality of packaging bags 1 are stacked, the protruding portion 13 is formed. Since a gap is formed on the laminated surface between the packaging bags 1 laminated by the above, when the front film 2 or the back film 3 of the laminated body 10 is sucked, the gap formed on the laminated surface is Since air will naturally infiltrate into the laminated body 10, only one packaging bag 1 can be easily and surely peeled from the laminate 10.

Therefore, the opening work of the opening 5 and the packaging bag 1
Since the peeling work can be easily and surely performed by blowing air or suction, the packaging work efficiency can be improved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A case in which a sandwich is packaged as an article to be packaged according to the present invention will be described below with reference to the drawings. <First Embodiment> In FIGS. 1 to 3, reference numeral 1 denotes a substantially trapezoidal packaging bag, which comprises a front film 2 and a back film 3 made of a uniaxially oriented polypropylene film having a thickness of about 0.025 mm. Furthermore, an opening 5 for inserting a sandwich is provided on one end side of the packaging bag 1, and the other side end is closed by heat sealing to form a sealing portion 1a.
The one side 1b of the other end of the packaging bag 1 has a substantially trapezoidal tongue piece.
4 has been extended.

Reference numeral 6 denotes a sealing piece extended from the back film 3 to seal the opening 5, and the sealing piece 6 is provided with perforations 7 as cutting lines. Figure 2 is a packaging bag
1 shows only the back film 3 and 8 indicates a plurality of protrusions provided on the inner surface 3a of the back film 3 by embossing, and the forming positions are arranged at substantially equal intervals as shown in the figure. They may be arranged randomly, or may be arranged irregularly.

As shown in FIG. 3, reference numeral 9 denotes each of the protrusions between the inner surface side 2a of the front film 2 and the inner surface side 3a of the back film 3.
8 shows a plurality of gaps formed by 8.

The protrusion height h of the protrusion 8 is 0.2 mm to 1 m.
About m is preferable. If the range of the protrusion height h is less than 0.2 mm, the protrusion 8 may be difficult to distinguish, that is, the gap 9 may not be formed, and if it exceeds 1 mm. The formation of the gap 9 is very preferable, but it is based on the reason that the packaging bag 1 itself becomes too thick, which may cause trouble during the packaging work, for example.

In FIG. 4, 10 is a stack of a large number of packaging bags 1 having the above construction, and is provided between the end 6a of the sealing piece 6 of each of the packaging bags 1 and the perforation 7. Is a bag for each packaging 1 by making holes 11 and 11 with two heated rods.
Shows a laminated body integrated by heat welding.

A method of manufacturing a package by packaging a sandwich using the laminate 10 (a large number of packaging bags 1) having the above structure will be described below. Edge of the laminate 10
When air is blown from 6a in the direction of the opening 5 (direction of arrow α in FIG. 4) by a fan or the like, air is blown into the two-dot chain line in FIG. 4 and the gap 9 in the opening 5 as shown in FIG. By entering, the inner surface side 2a of the front film 2 and the inner surface side 3a of the back film 3 can be peeled off easily and surely to open the opening 5.

Then, a sandwich is inserted into the opened opening 5, and the packaging bag 1 is separated from the laminated body 10 along the perforations 7 provided on the sealing piece 6, and then the opening is formed.
A package is manufactured by sealing 5

Although the package is manufactured by the same procedure after that, according to the packaging bag 1 of the present invention, the opening operation of the opening 5 can be performed easily and surely, and the above-mentioned sewing machine is used. The packaging bag 1 is separated from the laminated body 10 along the eye 7, and at the same time, the opening 5 of the next packaging bag 1 located below the packaging bag 1 is opened, so that the working efficiency is improved.

In the first embodiment, the protrusion 8 is provided on the inner surface side 3a of the back film 3, but the protrusion 8 may be provided on the inner surface side 2a of the front film 2, or both surfaces 2a, It may be provided in 3a. Further, the position and the number of the protrusions 8 are arbitrary, but one or more may be provided at least in the vicinity of the opening 5.

Further, in the case of manufacturing a package in the first embodiment, the laminated body 10 in which a large number of packaging bags 1 are laminated is used, but it does not necessarily have to be a large number of sheets, and it is not a single unit. You may manufacture a package with the packaging bag 1.

<Second Embodiment> A packaging bag according to the second embodiment.
1 is a sealing piece of the back film 3 as shown in FIGS. 6 and 7.
6 is formed in a substantially triangular shape, and a hole 6b is formed near the end 6a. In addition, the tongue 4 has a hole 4b.
Has been drilled. A plurality of protrusions 13 are provided on the outer surface 3b of the back film 3 by embossing.

The laminated body 10 according to the second embodiment is an example in which the respective packaging bags 1 are not integrated by heat welding as in the first embodiment, and the structure thereof is as shown in FIG. A large number of packaging bags 1 are laminated in the same direction, and a plurality of gaps 14 are formed between the first packaging bag 1'and the second packaging bag 1 "by the protrusions 13. Further, in the laminated body 10, the hole 4b of each packaging bag 1 is inserted into the support rod 15, and the hole 6b is inserted into the support rod 16 having the large diameter portion 16a at the tip thereof. It should be noted that both side ends of the laminated body 10 are auxiliary locked (not shown).

A method for manufacturing a package by packaging a sandwich using the laminate 10 having the above structure will be described with reference to FIGS.
This will be described with reference to FIG. A suction plate 17 having a substantially rectangular shape in which a plurality of suction holes are formed at a substantially central portion of the first packaging bag 1 '.
When sucked by the suction device 17 having a, the first packaging bag 1'is peeled off from the stack 10 by the suction force and sucked by the suction plate 17a (two-dot chain line in FIG. 8). Next, the suction device 17 is moved to the cylinder by the operation of the cylinder 18 to which the suction device 17 is fixed.
It moves according to the inclination angle of 18 (arrow β direction), and the opening 5 is completely opened as shown in FIG. At this time, the first packaging bag
By spontaneously entering air into the gap 14 between the 1 ′ and the second packaging bag 1 ″, only the first packaging bag 1 ′ can be easily and reliably peeled from the laminate 10.

Further, since the projection 13 is formed, the recess 13a is formed in the opening 5 in reverse. That is, as in the first embodiment, the gap 9 is formed in the opening 5, and the air naturally enters the gap 9 so that the opening 5 can be opened easily and reliably. .

Then, after a sandwich (two-dot chain line in FIG. 9) is inserted into the opening 5 of the first packaging bag 1'by an automatic insertion / sealing device (not shown), it is sealed as shown in FIG. The opening 5 is formed by joining the pieces 6 with the heat seal 19.
Will be sealed and a package will be manufactured.

After that, the package is manufactured by the same procedure. According to the packaging bag 1 of the present invention, there is no mistake in the opening work of the opening 5 and the peeling work of each packaging bag 1. The manufacturing operation of the package can be fully automated.

Further, in the second embodiment, the protrusion 13 is provided on the outer surface side 3b of the back film 3 as shown in FIG. 7, but the protrusion 13 is provided on the outer surface side 2b of the front film 2. Alternatively, it may be provided on both sides 2b, 3b. Further, the protrusion 13
The position and the number of the film are arbitrary, but one or more may be provided at least in the vicinity of the edge of the front film 2 or the back film 3.

Further, in the second embodiment, the suction device
Although the packaging bag 1 is suctioned by arranging 17 below the laminate 10, the suction bag 16 may be conversely positioned above the laminate 10 to suck the packaging bag 1. When sucking the packaging bag 1 from above as described above, the laminated body 10 is not always supported by the support rod.
It is not necessary to support 15, 16 and the laminated body 10 may be simply placed on a flat place.

<Third Embodiment> A packaging bag according to the third embodiment.
As shown in FIG. 11, 1 is a plurality of protrusions formed by embossing on the inner surface side 3a of the back film 3 and the outer surface side 2b of the front film 2.
8 and a protrusion 13 are provided. In addition, a packaging bag 1
The sealing piece 6 has two holes 20,20.

The laminated body 10 is formed by laminating a large number of the packaging bags 1 as shown in FIG.
Is inserted into two hangers 21 and 21 and is supported by it.

A method of packaging a sandwich by using the laminated body 10 having the above-mentioned structure to manufacture a packaged body is such that when air is blown from above the laminated body 10 in the downward direction (arrow γ direction shown in FIG. 12), the inside of the opening 5 The air can enter the gap 9 to easily and surely open the opening 5, and the sandwich is inserted and the opening 5 is sealed to manufacture the package. According to this method, it is not necessary to heat-seal each packaging bag 1 and engrave perforations as compared with the first embodiment, and the packaging bag 1 is laminated along the perforations 10 to form a laminate. You don't have to separate it from.

Alternatively, the package may be manufactured by a method in which the packaging bag 1 is suction-peeled from the laminate 10 using a suction machine. In this case as well, as in the second embodiment described above, since the projecting portion 13 is formed on the outer surface side 2b of the front film 2, each packaging bag is formed.
Needless to say, since the gap 14 is formed between the ones, the packaging bag 1 can be peeled easily and surely, and the opening 5 can be opened.

In the third embodiment described above, the protrusions 8 and 13 are provided on the outer surface side 2b of the front film 2 and the inner surface side 3a of the back film 3, respectively. Inner side of
2a and the outer surface 2b of the back film 3 may be provided, or may be provided on the entire surfaces 2a, 2b, 3a, 3b.

<Other Embodiments> The protrusions 8 and 13 provided on the packaging bag in each of the above-described embodiments are not necessarily formed in a substantially circular shape having a size as shown in FIG. However, the shape is not limited. For example, it may be an ellipse, a triangle, a polygon such as a quadrangle, etc., a substantially rod shape as shown in (a) of FIG. 13, or a substantially lattice shape as shown in (b) of FIG. The plan view shape can be various shapes. Also, the protrusions 8,
Although the cross-sectional view shape of 13 is a substantially semicircular shape as shown in FIG. 3 and FIG. 7, it is not necessarily limited to the substantially semicircular shape, and for example, a cross-sectional view as shown in FIG. The shape may be a substantially triangular shape or a substantially rectangular shape in cross section as shown in (b) of FIG.

Further, in each of the above embodiments, the projecting portions 8 and 13 provided on the packaging bag are not necessarily formed by embossing, and other substances are attached to the film by printing or the like. You may form a protrusion part. Further, the protrusions 8 and 13 are formed, for example, by forming at least one of the front film 2 and the back film 3 by applying extremely weak heat, forming a substantially wavy shape by a chemical treatment or other method. It may be formed. The point is that the uneven portion may be provided on the surface of the film to form a gap in the opening and between the stacked packaging bags.

Further, in each of the above embodiments, the packaging bag 1
Is made of a uniaxially stretched polypropylene film with a thickness of about 0.025 mm, but the thickness and material are not limited to this, and other synthetic resin films such as cellophane, polyvinyl chloride, polyethylene, etc. It may be paper or the like. In addition, the characteristics of the film are not limited to the uniaxially stretchable property, and may be, for example, biaxially stretched or non-stretched. The front film 2 and the back film 3 can be selected in various ways. That is, as long as it is suitable for the article to be packaged and has a function as a packaging bag, its thickness and material are not critical.

In each of the above embodiments, the packaging bag has a substantially trapezoidal shape, but is not limited to the above shape.
Any material may be used as long as it conforms to the predetermined shape of the article to be wrapped.

In each of the above embodiments, the sandwich is the article to be packaged, but the article is not limited to the sandwich.

[0040]

The packaging bag of the present invention is provided with a plurality of protrusions on at least either the inner surface side of the front film or the inner surface side of the back film, so that the inside of the opening, that is, the inner surface of the front film. Since a gap is formed between the side and the inner surface of the back film and between the protrusions, the inner surfaces of the film are not completely adhered to each other. Then, if the air is forcedly blown into the opening, air will enter the gap, and the opening can be opened easily and reliably, so that the package can be easily manufactured.

Further, in a laminated body in which a plurality of protrusions are provided on at least either the outer surface side of the front film or the outer surface side of the back film of the packaging bag, and a large number of the packaging bags are laminated. In addition, since the projecting portion forms a gap in the laminated surface between the packaging bags of the laminate, the packaging bags are not completely adhered to each other. Then, when the packaging bag is sucked, air naturally enters the gap formed on the laminated surface, so that the packaging bag can be easily and reliably peeled from the laminated body one by one. The package can be easily manufactured. Further, according to the present invention, it is difficult to open the opening as in the conventional case or when the packaging bag is peeled off.
Since the problem of not peeling one by one is solved, it becomes possible to manufacture a package using a fully automated device.

As described above, the work of peeling off the opening of the opening and the packaging bag can be carried out easily and surely, so that the efficiency of the packaging work can be improved.

For example, when a protrusion is formed on the inner surface of the surface film by embossing, a recess is formed on the outer surface of the surface film at the same time. Produces the same effect as doing.

[Brief description of drawings]

FIG. 1 is a plan view of a packaging bag according to an embodiment of the present invention.

FIG. 2 is a plan view of a back film.

3 is a sectional view of the packaging bag of FIG. 1 taken along the line AA.

FIG. 4 is a perspective view of a laminated body.

5 is a partial cross-sectional view taken along the line BB of FIG. 4 at the time of manufacturing the package.

FIG. 6 is a plan view of a packaging bag according to another embodiment.

FIG. 7 is a sectional view taken along line CC of the packaging bag of FIG.

FIG. 8 is a partial cross-sectional view of a laminated body of another example at the time of manufacturing a package.

FIG. 9 is a partial cross-sectional view of a laminated body of another example at the time of manufacturing a package.

FIG. 10 is a perspective view of a package according to another embodiment when manufacturing the package.

FIG. 11 is a sectional view of a packaging bag according to another embodiment.

FIG. 12 is a perspective view of a laminated body of another example at the time of manufacturing a package.

13 (a) and 13 (b) are plan views showing the shape of the protrusion in another embodiment.

14 (a) and 14 (b) are enlarged cross-sectional views of a main part showing the shape of a protrusion in another embodiment.

[Explanation of symbols]

 1 Packaging bag 2 Front film 2a Inner surface side 2b Outer surface side 3 Back film 3a Inner surface side 3b Outer surface side 2b 4 Sealing part 5 Opening part 8 Projection part 10 Laminate 13 Protrusion part

Claims (7)

[Claims] 1. A package having an opening (5) at one end of a front film (2) and a back film (3) and a closed part (1a) formed by closing the other end. In the bag (1), at least one or more protrusions (8) are provided on at least either the inner surface side (2a) of the front film (2) or the inner surface side (3a) of the back film (3). A packaging bag characterized by being formed. 2. A package having an opening (5) at one end of a front film (2) and a back film (3) and a closed part (1a) formed by closing the other end. In the bag (1), at least one projection (13) is provided on at least either the outer surface side (2b) of the front film (2) or the outer surface side (3b) of the back film (3). A packaging bag characterized by being formed. 3. A package in which an opening (5) is formed at one end of a front film (2) and a back film (3) and a sealing part (1a) is formed by closing the other end. In the bag (1), at least one or more protrusions (8) are provided on at least either the inner surface side (2a) of the front film (2) or the inner surface side (3a) of the back film (3). And at least the outer surface side of the surface film (2)
A packaging bag comprising at least one protrusion (13) provided on either (2b) or the outer surface side (3b) of the back film (3). 4. The packaging bag according to claim 1, wherein each of the protrusions (8), (13) is formed by embossing. 5. The front film (2) and the back film (3) have an opening (5) at one end and the other end is closed to form a sealing part (1a). At least the surface film (2)
The opening (5) of the packaging bag (1) provided with at least one or more protrusions (8) on either the inner surface side (2a) or the inner surface side (3a) of the back film (3). After sending air into the inside to open the opening (5) and inserting the article through the opening (5),
A method for producing a package using a packaging bag, which comprises producing the package by sealing the opening (5). 6. The front film (2) and the back film (3) each have an opening (5) at one end and the other end is closed to form a sealing part (1a). At least the surface film (2)
By laminating a large number of packaging bags (1) having at least one or more protrusions (13) on either the outer surface side (2b) or the outer surface side (3b) of the back film (3) A laminate (10) is formed, and a front film (2) or a back film (3) of the laminate (10)
The packaging bag from the laminate (10) by sucking
(1) is peeled off one by one to open the opening (5) of the packaging bag (1), and after inserting an article through the opening (5), the opening is opened.
A method for producing a package using a packaging bag, which comprises producing a package by enclosing (5). 7. The method for producing a package using the packaging bag according to claim 5, wherein the protrusions (8), (13) are formed by embossing.