JP5753722B2 - Packaging bag - Google Patents

Description

  The present invention relates to a packaging bag that accommodates an article to be packaged such as food and drink and daily necessities.

  2. Description of the Related Art Conventionally, various types of packaging bags for containing objects such as food and drinks and daily necessities have been provided, and one of them is an overlapped sheet material (a folded sheet material or a laminated sheet material). The end portions of the two sheet materials) are connected to each other by heat sealing or the like, so that an internal space that accommodates an object to be accommodated is formed between the sheet materials, and the regions where the end portions of the sheet material are connected ( Hereinafter, what is provided with an opening assisting means serving as an opening start point in a connection area) is provided.

  The opening assisting means generally employs notches such as notches and notches that open on the outer edge of the connection region (sheet material). If the notches are formed by notches or notches, the notches As the corners (pointed parts) are formed on both sides (open ends) of the tape, and there is a possibility that the hand may be cut at the time of opening, the opening assisting means may be configured by a porous group consisting of a number of piercing holes penetrating the connection region. It has been proposed (for example, see Patent Document 1).

  Such opening assist means pulls the region where the porous group is formed, so that the porous group (a plurality of substantial portions formed between the piercing holes) is cut in a chain. That is, since the opening assisting means is provided with a large number of piercing holes (perforated group), a weaker part than the other part (part where the substance between the piercing holes is present) is formed intermittently. The chain is cut like a perforation just by applying force. Accordingly, the opening assisting means having the above-described structure is not easily formed at the time of opening since the corner portion is not formed on the outer edge of the connection region as in the case of the conventional notch.

  However, since the opening assisting means having the above configuration is composed of a porous group (multiple piercing holes), the cutting direction (direction in which multiple piercing holes are cut in a chain) depends on the direction of action of the pulling force when opening. As a result, the sheet material forming the internal space may not be cut in a direction suitable for taking out the object.

  In view of such a problem, a packaging bag configured to correct the cutting direction at the time of opening has been proposed (see, for example, Patent Document 2). In addition to the porous group, the opening assisting means for the packaging bag includes notches or notches formed so as to protrude toward the internal space in a region adjacent to the porous group on the internal space side.

  The opening assisting means having the above-described configuration pulls the region where the porous group is formed, and the porous group (between the puncture holes) is cut in a chain, and the tensile force is notched or the portion where the notch protrudes (the notch). The part that protrudes to the innermost side of the edge formed by the notch or notch), and that part begins to cut as the starting point of the cutting position (the point of action of the tensile force necessary for cutting), and the cutting The position is continuously shifted toward the inner space side (the outer edge on the opposite side) and is cut (sliced) smoothly.

  Therefore, the opening assisting means having the above-described structure is easy to open, since there is no risk of cutting hands at the time of opening since corners are not formed on the outer edge of the connection region unlike the conventional notch. Can be corrected to the proper position.

Japanese Patent Laid-Open No. 10-119984 JP 2001-48196 A

  By the way, the packaging bag (opening assisting means) having the above-described configuration can cut the region where the porous group is formed with a slight pulling force as described above, but when cutting from the notch or notch to the inner space side (inside). A larger pulling force is required than when the porous group is cut. That is, since the opening assisting means having the above-described configuration has a cut or notch formed in the region closer to the internal space than the porous group, the cutting position at the time of opening is changed from the region where the porous group is formed to the cut or notched portion. When it reaches, the cutting position cannot be directly changed to the notched or notched protruding portion, and it becomes a state equivalent to starting cutting (cutting) from the notched or notched protruding portion. For this reason, resistance is generated when the cutting position changes from the region where the porous group is formed to a notched or notched protruding portion having a rigidity higher than that of the region, and the force required for cutting becomes large.

  For this reason, the packaging bag (opening assisting means) having the above-described configuration must be applied in stages with different pulling forces when the connection region is cut in order to open the bag, from the connection region toward the internal space. There is a problem that it cannot be cut (teared) smoothly.

  Therefore, in view of such circumstances, the present invention provides a packaging bag that can be opened easily and smoothly on the premise that an opening assisting means is provided in a connection region where the ends of the sheet material are connected to each other. Let it be an issue.

In the packaging bag according to the present invention, the end portions of the stacked sheet materials are connected to each other with a predetermined width to form an internal space that accommodates an object to be stored, and the connection region in which the end portions of the sheet material are connected to each other. In a packaging bag provided with an opening assisting means serving as an opening start point at a predetermined position, the opening assisting means includes a porous group composed of a large number of holes, and is formed only in the porous group and penetrates the connection region. The porous group is provided within a predetermined range including an outer edge of the connection region, and the notch is a first notch portion extending toward the inner space side from the outer edge side of the connection region. And a second cut portion extending in a direction intersecting with each of the extending direction of the first cut portion and the cutting direction of the sheet material, and the first cut portion is an intermediate position of the second cut portion. It is characterized by being connected to.

  According to the packaging bag having the above-described structure, by providing a large number of holes (porous groups), the space between the holes (substance part) becomes weaker than other parts. Between the holes at a plurality of locations are cut in a chain like perforations. And after the porous group (between the holes) is cut in a chain, any part of the cut where the cutting position is on the outer edge side (the edge part on the outer edge side of the first notch part or the second notch part) To reach. In other words, since the second cut portion extends in the direction intersecting the cutting direction (width direction of the connection region), even if the cutting position is shifted in the extending direction of the outer edge at the time of opening, the cutting position is the first. One of the two cuts will be reached. If it does so, a tension | pulling effect will act on the front-end | tip (one end) of the all insertion part in the internal space side intensively.

  In the packaging bag having the above configuration, since the cut (first cut portion) is in the porous group, the first end (one end) of the first cut portion is on the boundary on the inner space side in the porous group. Even if there is a porous group on the inner space side of the tip of the notch, and even if the tensile force acting intensively on the tip of the first notch is small, the part is in the cutting position (necessary for cutting) The starting point of the point of action of the pulling force) starts to cut. Then, the cutting position is continuously shifted toward the inner space side (the outer edge on the opposite side) to be cut (sliced) smoothly.

  Therefore, the packaging bag having the above-described configuration can be cut smoothly without stepwise application of tensile forces having different sizes over the entire length in the cutting direction.

  In this case, the second cut portion may be formed so as to be perpendicular to or substantially perpendicular to the first cut portion. The second cut portion may be formed such that both sides of the midway position are inclined toward the inner space side. In this way, the cutting position reaches the second cut portion even if cutting is started from any location of the porous group, and the pulling force accompanying the opening is concentratedly applied to the tip of the first cut portion. be able to.

In the packaging bag according to the present invention, the end portions of the stacked sheet materials are connected to each other with a predetermined width to form an internal space that accommodates an object to be stored, and the connection region in which the end portions of the sheet material are connected to each other. In a packaging bag provided with an opening assisting means serving as an opening start point at a predetermined position, the opening assisting means includes a porous group composed of a large number of holes, and is formed only in the porous group and penetrates the connection region. A pair of cuts, and the porous group is provided within a predetermined range including an outer edge of the connection region, and the pair of cuts cuts the sheet material toward the inner space side with the outer edge side of the connection region as a base end. It extends in a direction intersecting the direction , and is formed so as to approach each other toward the inner space side.

  According to the packaging bag having the above-described structure, by providing a large number of holes (porous groups), the space between the holes (substance part) becomes weaker than other parts. Between the holes at a plurality of locations are cut in a chain like perforations. And after a porous group is cut | disconnected in a chain | linkage, a cutting position reaches | attains between a pair of cuts (when a pair of cuts are connected inside, its connection position) or any one cut. In other words, since the pair of cuts extend in a direction intersecting the cutting direction (width direction of the connection region), even if the cutting position is shifted in the direction in which the outer edge extends during opening, the cutting position is a pair of cuttings. An incision in or between either will be reached. When the cutting position is between a pair of cuts, the porous group is cut into the inner space side as it is, and when the cutting position reaches one of the cuts, the pulling action is moved to the inner space side. It acts on the tip (one end) of a notch intensively.

  In the packaging bag having the above configuration, since the cut is in the porous group, the tip of the cut is on the inner space side boundary (final line) in the porous group or the inner space side than the tip of the cut portion. Even if the porous group is present and the tensile force that acts intensively on the tip of the cut is small, the part should start cutting as the starting point of the cutting position (the point of action of the tensile force necessary for cutting). become. Then, the cutting position is continuously shifted toward the inner space side (the outer edge on the opposite side) to be cut (sliced) smoothly.

  Therefore, the packaging bag having the above-described configuration can be cut smoothly without stepwise application of tensile forces having different sizes over the entire length in the cutting direction.

In the packaging bag according to the present invention, the end portions of the stacked sheet materials are connected to each other with a predetermined width to form an internal space that accommodates an object to be stored, and the connection region in which the end portions of the sheet material are connected to each other. In a packaging bag provided with an opening assisting means serving as an opening start point at a predetermined position, the opening assisting means includes a porous group composed of a large number of holes, and is formed only in the porous group and penetrates the connection region. The porous group is provided within a predetermined range including the outer edge of the connection region, and the notch is formed to taper toward the cutting direction of the sheet material toward the inner space. It is characterized by that.

  According to the packaging bag having the above-described structure, by providing a large number of holes (porous groups), the space between the holes (substance part) becomes weaker than other parts. Between the holes at a plurality of locations are cut in a chain like perforations. And after a porous group is cut | disconnected in a chain | linkage, the cutting | disconnection position reaches | attains any part which exists in the outer edge side of a notch part. That is, the cutout portion is formed so as to be tapered toward the inner space side, so that the edge on the outer edge side extends in a direction intersecting with the cutting direction (width direction of the connection region). Even if the cutting position is sometimes shifted in the direction in which the outer edge extends, the cutting position reaches any part of the notch. If it does so, a tension | pulling effect will act on the front-end | tip (or vertex) of the notch part in an internal space side intensively. And the packaging bag of the said structure has a notch part in a porous group, Therefore The front-end | tip (or vertex) of a notch part is on the boundary of the internal space side in a porous group, or it is an inner space side rather than the vertex of a notch part Even if the porous group is in a state where the tensile force acting intensively on the tip (or vertex) of the notch is small, the part is the starting point of the cutting position (the point of action of the tensile force necessary for cutting). Will begin to cut. Then, the cutting position is continuously shifted toward the inner space side (the outer edge on the opposite side) to be cut (sliced) smoothly.

  Therefore, the packaging bag having the above-described configuration can be cut smoothly without stepwise application of tensile forces having different sizes over the entire length in the cutting direction.

  As described above, according to the packaging bag of the present invention, on the premise that the opening assisting means is provided in the connection region where the end portions of the sheet material are connected to each other, the excellent effect of being able to open easily and smoothly is provided. Can play.

It is explanatory drawing of the packaging bag which concerns on 1st embodiment of this invention, Comprising: (a) shows a front view, (b) shows II sectional drawing of (a). The whole perspective view of the packaging bag concerning a first embodiment is shown. It is the elements on larger scale of the opening assistance means containing the elements on larger scale of the porous group of the packaging bag which concerns on 1st embodiment, Comprising: The A section enlarged view of Fig.1 (a) is shown. It is the elements on larger scale of the packaging bag which concerns on 2nd embodiment of this invention, Comprising: The elements on larger scale of the opening assistance means containing the elements on larger scale of a porous group are shown. It is the elements on larger scale of the packaging bag which concerns on 3rd embodiment of this invention, Comprising: The elements on larger scale of the opening assistance means containing the elements on larger scale of a porous group are shown. It is the elements on larger scale of the packaging bag which concerns on other embodiment of this invention, Comprising: (a) is the end of the 1st notch part at the vertex of the 2nd notch part formed in the bending shape (gutter shape). The enlarged view of the opening assistance means provided with the incision to which the is connected is shown, (b) is a halfway position of the second incision part formed in a bent shape (character shape) The enlarged view of the opening assistance means provided with the incision connected to is shown. It is the elements on larger scale of the packaging bag which concerns on another embodiment of this invention, Comprising: The enlarged view of the opening assistance means by which the one end by the side of the internal space of a pair of cut was made into the non-connection state is shown. It is the elements on larger scale of the packaging bag which concerns on another embodiment of this invention, Comprising: (a) shows the enlarged view of the opening assistance means provided with the square-shaped (diamond shape) notch part, (b) The enlarged view of the opening assistance means provided with the notch part of pentagon shape (home base shape) is shown. It is the elements on larger scale of the packaging bag which concerns on another embodiment of this invention, Comprising: (a) is a porous group formed in the area | region of a triangular shape, and a 2nd cut part is bent along the boundary of a porous group The enlarged view of the opening assistance means provided with the notch | incision formed in the shape is shown, (b), the porous group was formed in the triangular area | region, and the notch was formed in the triangular shape along the boundary of the porous group The enlarged view of an opening assistance means is shown.

  Hereinafter, the packaging bag which concerns on 1st embodiment of this invention is demonstrated, referring an accompanying drawing.

  As shown in FIGS. 1A and 1B, the packaging bag according to the present embodiment accommodates the object P by connecting the ends of the stacked sheet materials S1 and S1 with a predetermined width. An opening space is formed, and an opening assisting means 4 serving as an opening start point is formed at a predetermined position of the connection region 2b where the ends of the sheet materials S1 and S1 are connected with a predetermined width. In each drawing attached to the present specification, the boundary on the inner space SP side of the connection region 2b is represented by a two-dot chain line.

  More specifically, the packaging bag 1 according to the present embodiment is a standing type packaging bag 1, a pair of wall portions 2 a and 2 a that are opposed to each other in the front-rear direction and are connected to each other in the width direction. A pair of wall portions 2a, 2a is provided with a gusset-shaped bottom portion 3 that closes one of the openings. The packaging bag 1 accommodates an object P from the other opening defined by the pair of wall portions 2a, 2a, and the other opening is sealed.

  The pair of front and rear walls 2a, 2a are each made of a sheet material and are formed in a square shape in front view. In the present embodiment, the pair of front and rear wall portions 2a and 2a are regions (substantially rectangular regions) excluding the periphery (outer peripheral end portions) of rectangular sheet materials (hereinafter referred to as wall sheet materials) S1 and S1, respectively. ). That is, the pair of wall sheet materials S1 and S1 are overlapped in a state in which the longitudinal directions coincide with each other, and both ends in a direction orthogonal to the longitudinal direction (hereinafter referred to as the width direction) are connected with a predetermined width. Yes.

  Thus, the pair of wall sheet materials S1 and S1 form a connection region 2b connected to each other at both ends in the width direction, and the wall portions 2a and 2a are formed between the connection regions 2b. The connection between the pair of wall sheet materials S1 and S1 can be performed by adhesion using an adhesive or welding between the wall sheet materials S1 and S1, and in the present embodiment, by welding (heat sealing). Has been done. Accordingly, the wall sheet materials S1 and S1 according to the present embodiment are at least surfaces facing each other, and both end portions in the width direction can be melted. That is, the wall sheet materials S1 and S1 employ a single-layer resin sheet material that can be melted at a predetermined temperature, or two or more resin sheet materials (laminated sheets) that have at least the innermost meltable resin layer. be able to.

  The packaging bag 1 of this embodiment is intended to contain liquid foods such as beverages and soup stock, and in order to prevent oxidation of these foods, the wall sheet materials S1 and S1 have gas barrier properties. The sheet material which has is employ | adopted. As the wall sheet materials S1 and S1 according to the present embodiment, laminated sheets composed of a plurality of layers having different characteristics are employed. Specifically, the wall sheet materials S1 and S1 according to the present embodiment have a resin-made seal layer (not shown) having heat melting property (adhesiveness) in the innermost layer, and a thin film on the seal layer. A metal layer (not shown) and a resin coating layer (not shown) are formed.

  In the wall sheet materials S1 and S1 (laminated sheets) according to the present embodiment, the coating layer is a base material, and two layers such as a biaxially stretched polypropylene film, a biaxially stretched polyethylene terephthalate film, and a biaxially stretched nylon film are used. An axially stretched film can be employed. The metal layer is formed by evaporating a metal such as aluminum on the coating layer (base material). The seal layer is made of a resin such as low density polyethylene, medium density polyethylene, and cotton-like low density polyethylene, or a sheet material thereof, and is formed by being applied or pasted onto the metal layer. Accordingly, the wall sheet materials S1 and S1 according to the present embodiment are overlapped with the seal layers facing each other in order to heat-seal the ends.

  The bottom 3 is made of a sheet material. While the sheet material (hereinafter referred to as the bottom sheet material) S2 constituting the bottom portion 3 is formed in a square shape, one direction is set to be the same size as the width of the wall sheet materials S1, S1, The direction orthogonal to one direction is set shorter than one direction. Then, the bottom sheet material S2 is folded in half (half-fold) in a direction orthogonal to one direction, and a pair of wall sheet materials are positioned so that the ridge line (the ridge line formed by the double fold) is located on the back side. It is interposed between the longitudinal ends of S1 and S1. And the bottom sheet S2 folded in half is on the end portions (one end portion in the longitudinal direction and both end portions in the width direction) of the wall sheet materials S1, S1 facing each of the two regions with the ridgeline as a boundary. It is connected. Moreover, as for sheet material S2 for bottoms which concerns on this embodiment, the both ends of the longitudinal direction (the said one direction) of each of two area | regions which made the ridgeline the boundary are also connected.

  As a result, the bottom sheet material S2, as shown in FIG. 1 (b), has a gusset-shaped bottom portion 3 in which one opening defined by the pair of wall portions 2a, 2a (wall sheet materials S1, S1) is closed. Is forming. That is, the packaging bag 1 according to the present embodiment includes a bottom portion 3 (sheet material for the bottom) folded in half in a state in which the object P is accommodated in the internal space SP, as shown in FIGS. S2) is opened so that one end side of the pair of wall portions 2a, 2a (wall sheet materials S1, S1) is separated (becomes annular) and can be self-supported by setting the one end side downward.

  The connection between the bottom sheet material S2 and the wall sheet materials S1 and S1 can also be performed by bonding using an adhesive or by welding the wall sheet materials S1 and S1. In this embodiment, the welding is performed. (Heat sealing). Accordingly, the bottom sheet material S2 according to the present embodiment can be melted at both ends in the longitudinal direction and both ends in the direction perpendicular to the longitudinal direction, which are surfaces facing outward when folded at least in half. ing. That is, the bottom sheet material S2 is also a single-layer resin sheet material that can be melted at a predetermined temperature, or two or more layers that have a meltable resin layer in the innermost layer on the side of at least one surface (surface facing outward). A multilayer resin sheet material can be employed. The bottom sheet material S2 according to the present embodiment employs the same material as the wall sheet materials S1 and S1.

  And the packaging bag 1 which concerns on this embodiment is the longitudinal direction which a pair of wall part 2a, 2a (wall sheet material S1, S1) forms, as shown to Fig.1 (a), FIG.1 (b), and FIG. After the object P is accommodated in the internal space SP from the opening on the other end side in the direction, the other end portions of the pair of wall portions 2a, 2a (wall sheet materials S1, S1) are heat sealed. It is sealed.

  The packaging bag 1 which concerns on this embodiment can cut | disconnect wall part 2a, 2a along the other end part by the one end side rather than the other end part of wall part 2a, 2a to be sealed. Along with this, the packaging bag 1 is provided with an opening assisting means 4 at a predetermined position on one end side with respect to the other end portions of the wall portions 2a, 2a in the connection region 2b. Since the packaging area | region 1 which concerns on this embodiment has the connection area | region 2b formed in the both ends of the width direction, the opening assistance means 4 is provided in each connection area | region 2b so that it can open from any. Accordingly, the opening assisting means 4 is provided in each connection region 2b so as to be symmetrically arranged with respect to a center line extending in the longitudinal direction at the center in the width direction.

  As shown in FIG. 3, the opening assisting means 4 according to the present embodiment includes a porous group 40 constituted by a large number of holes h, and a cut 41 formed in the porous group 40.

  The porous group 40 is provided within a predetermined range including the outer edge of the connection region 2b. That is, the porous group 40 is formed in a range not reaching the boundary between the connection region 2b and the walls 2a and 2a (internal space SP) from the outer edge of the connection region 2b. The porous group 40 according to the present embodiment is provided in a rectangular region having the outer edge of the connection region 2b as one side.

  Each of the holes h constituting the porous group 40 passes through the connection region 2b. Each hole h only needs to be penetrated, and the hole shape is set to various shapes such as a dot shape (small-diameter circular shape), a cut shape (linear shape), a circular shape, and a polygonal shape. May be. In this embodiment, each hole h ... which comprises the porous group 40 is formed in dot shape (small diameter circular shape). And many holes h ... which comprise the porous group 40 are arrange | positioned so that it may concentrate as much as possible within a predetermined area | region according to hole size.

  The porous group 40 according to the present embodiment is composed of an aggregate of dot-shaped holes h, and the holes h are arranged in an aligned state. In addition, although many holes h ... may be arrange | positioned in a matrix form or zigzag form, you may arrange | position without regularity. And since the porous group 40 which concerns on this embodiment is comprised by the aggregate | assembly of the dotted | punctate hole h ..., each hole h ... is formed by piercing the connection area | region 2b with a needle-shaped blade. Yes.

  The notch 41 extends from the outer edge side of the connection region 2b to the inner space SP side in a base end and a direction intersecting the extending direction of the first notch portion 41a. It is comprised by the 2nd notch part 41b.

  The first notch 41a is connected to the middle position of the second notch 41b. More specifically, the first insertion portion 41a is provided at the center in the direction in which the outer edge of the connection region 2b extends in the region where the porous group 40 is formed (longitudinal direction of the wall sheet materials S1 and S1). ing. The first insertion portion 41a according to the present embodiment is formed in a straight line, and the boundary of the internal space SP side in the region where the porous group 40 is formed and the connection region 2b in the region where the porous group 40 is formed. It is formed so as not to reach the boundary on the outer edge side (the outer edge of the connection region 2b). In other words, the first insertion portion 41a is located on the outer edge side of the connection region 2b with respect to the inner space SP side boundary in the region where the porous group 40 is formed, and on the outer edge side of the connection region 2b. Is located closer to the inner space SP than the boundary on the outer edge side of the connection region 2b in the region where the porous group 40 is formed (the outer edge of the connection region 2b).

  The second cut portion 41b includes a boundary on one end side in the longitudinal direction of the walls 2a, 2a in the region where the porous group 40 is formed, and the longitudinal direction of the walls 2a, 2a in the region where the porous group 40 is formed. It is formed between the boundary on the end side. The second cut portion 41b according to the present embodiment has one end positioned on the inner side of the connection region 2b from the boundary on one end side in the longitudinal direction of the walls 2a and 2a in the region where the porous group 40 is formed, and the other end Is located inside the connection region 2b with respect to the boundary on the other end side in the longitudinal direction of the walls 2a, 2a in the region where the porous group 40 is formed. The 2nd notch part 41b which concerns on this embodiment is formed in linear form, and is formed so that it may become a right angle or a substantially right angle with respect to the 1st notch part 41a. In the present embodiment, the second cut portion 41b has the other end of the first cut portion 41a (the end portion on the outer edge side of the connection region 2b) connected to the center position in the linearly extending direction. Thereby, the cut 41 according to the present embodiment is formed in a T shape.

  The packaging bag 1 which concerns on this embodiment consists of the above structure, and continues, The effect | action of the opening assistance means 4 at the time of opening of the packaging bag 1 of the said structure is demonstrated.

  In opening the packaging bag 1 having the above-described configuration, both sides (two locations) of the opening assisting means 4 (porous group 40) in the connection region 2b on either one end side in the width direction are gripped and pulled in different directions. Then, the porous group 40 is cut in a chain manner like a perforation. That is, since the packaging bag 1 having the above-described structure is provided with a large number of holes h (porous group 40), the space between the holes h (substance) is more fragile than the other parts. By simply applying a force, the holes h in a plurality of places are cut in a chain manner like perforations. And after the porous group 40 (between the holes h...) Is cut in a chained manner, any part of the cut 41 at the outer edge side of the connection region 2b (on the outer edge side of the first insertion part 41a). To the end or second cut 41b).

  That is, since the second cut portion 41b extends in a direction intersecting with the cutting direction (width direction of the connection region 2b) (perpendicular direction in the present embodiment), the cutting position at the time of opening is the connection region 2b. Even if it deviates in the direction in which the outer edge extends, the cutting position reaches any part of the second cut portion 41b. If it does so, a tension | pulling action will act on the front-end | tip of the 1st insertion part 41a in the internal space SP side intensively.

  In the packaging bag 1 according to the present embodiment, since the notch 41 (first insertion portion 41a) is in the porous group 40, the porous group 40 is located closer to the inner space SP than the tip of the first insertion portion 41a. Even if there is a small pulling force that acts intensively on the tip of the first insertion portion 41a, the portion becomes the starting point of the cutting position (the point of action of the pulling force necessary for cutting) and begins to cut. become. Then, the cutting position continuously changes toward the inner space SP side (the outer edge on the opposite side) and is cut (sliced) smoothly.

  Therefore, the packaging bag 1 having the above-described configuration can be cut easily and smoothly over the entire length in the width direction without stepwise application of tensile forces of different sizes over the entire length in the cutting direction.

  Next, the packaging bag which concerns on 2nd embodiment of this invention is demonstrated. The packaging bag according to the present embodiment has the same configuration as the packaging bag according to the first embodiment except for the opening assisting means. Therefore, in the following description, the same configuration and corresponding configuration as in the first embodiment will be given the same name and the same reference numerals, and the same configuration will be described here with reference to the first embodiment. Will be omitted and only the opening assistance means will be described.

  As shown in FIG. 4, the opening assisting means 4 according to the present embodiment includes a porous group 40 composed of a large number of holes h, and a pair of cuts 42 and 42 formed in the porous group 40. Yes.

  The porous group 40 is provided in a predetermined range including the outer edge of the connection region 2b as in the first embodiment. That is, the porous group 40 is formed in a range not reaching the boundary between the connection region 2b and the walls 2a and 2a (internal space SP) from the outer edge of the connection region 2b. The porous group 40 according to the present embodiment is provided in a rectangular region having the outer edge of the connection region 2b as one side.

  Each of the holes h constituting the porous group 40 passes through the connection region 2b. Each hole h only needs to be penetrated, and the hole shape is set to various shapes such as a dot shape (small-diameter circular shape), a cut shape (linear shape), a circular shape, and a polygonal shape. May be. In this embodiment, each hole h ... which comprises the porous group 40 is formed in dot shape (small diameter circular shape). And many holes h ... which comprise the porous group 40 are arrange | positioned so that it may concentrate as much as possible within a predetermined area | region according to hole size.

  The porous group 40 according to the present embodiment is composed of an aggregate of dot-shaped holes h, and the holes h are arranged in an aligned state. In addition, although many holes h ... may be arrange | positioned in a matrix form or zigzag form, you may arrange | position without regularity. And since the porous group 40 which concerns on this embodiment is comprised by the aggregate | assembly of the dotted | punctate hole h ..., each hole h ... is formed by piercing the connection area | region 2b with a needle-shaped blade. Yes.

  The pair of cuts 42, 42 are formed so as to extend toward the internal space SP with the outer edge side of the connection region 2b as a base end and approach each other toward the internal space SP side. The pair of cuts 42, 42 is a direction in which the outer edge of the connection region 2 b extends in the center of the direction in which the outer edge of the connection region 2 b extends (longitudinal direction of the wall sheet materials S 1, S 1) in the region where the porous group 40 is formed. Are symmetrically arranged with reference to a center line (virtual line) extending in a direction perpendicular to the reference line.

  Each incision 42 is located in two regions with the center line as a boundary, and is formed in a straight line. Each incision 42 does not reach the boundary on the inner space SP side in the region where the porous group 40 is formed and the boundary on the outer edge side of the connection region 2b in the region where the porous group 40 is formed (the outer edge of the connection region 2b). Is formed. That is, each notch 42 is located on the outer edge side of the connection region 2b with respect to the inner space SP side boundary in the region where the porous group 40 is formed, and the other end on the outer edge side of the connection region 2b. Is located closer to the inner space SP than the boundary on the outer edge side of the connection region 2b in the region where the porous group 40 is formed (the outer edge of the connection region 2b).

  In the present embodiment, the pair of cuts 42 and 42 are in a state in which one ends on the inner space SP side are connected to each other. That is, the pair of cuts 42 and 42 are connected to each other at the center in the extending direction of the outer edge of the connection region 2b in the region where the porous group 40 is formed (longitudinal direction of the wall sheet materials S1 and S1). Character ".

  The packaging bag 1 according to the present embodiment is as described above, and the operation of the opening assisting means 4 at the time of opening the packaging bag 1 having the above configuration will be described.

  In opening the packaging bag 1 having the above-described configuration, both sides (two locations) of the opening assisting means 4 (porous group 40) in the connection region 2b on either one end side in the width direction are gripped and pulled in different directions. Then, the porous group 40 is cut in a chain manner like a perforation. That is, since the packaging bag 1 having the above-described structure is provided with a large number of holes h (porous group 40), the space between the holes h (substance) is more fragile than the other parts. By simply applying a force, the holes h in a plurality of places are cut in a chain manner like perforations. And after the porous group 40 is cut | disconnected in a chain | linkage, a cutting | disconnection position reaches | attains the connection position of a pair of cuts 42 and 42, or any one cut 42. FIG.

  That is, since the pair of cuts 42 and 42 extend in the crossing direction with respect to the cutting direction (the width direction of the connection region 2b), the cutting position is shifted in the direction in which the outer edge of the connection region 2b extends at the time of opening. In this case, the cutting position reaches the connection position (one end) of the pair of cuts 42, 42 or one of the cuts 42. When the cutting position is at the connection position of the pair of cuts 42, 42, the porous group 40 is cut in a chain manner to the inner space SP side, and when the cutting position reaches one of the cuts 42, The pulling action is concentrated on the tip of the innermost cut 42 (the connection position where one end of the cut 42 is connected).

  And since the notch 42 exists in the porous group 40, the packaging bag 1 of the said structure has the porous group 40 also in the internal space SP side rather than the front-end | tip of the incision 42, and acted on the front-end | tip of the incision 42 intensively. Even if the pulling force is small, the portion becomes the starting point of the cutting position (the point of action of the pulling force necessary for cutting) and starts to cut. Then, the cutting position continuously changes toward the inner space SP side (the outer edge on the opposite side) and is cut (sliced) smoothly.

  Therefore, the packaging bag 1 having the above-described configuration can be cut easily and smoothly over the entire length in the width direction without stepwise application of tensile forces of different sizes over the entire length in the cutting direction.

  Next, the packaging bag which concerns on 3rd embodiment of this invention is demonstrated. In addition, the packaging bag which concerns on this embodiment is the same structure as the packaging bag which concerns on 1st and 2nd embodiment except for opening assistance means. Therefore, in the following description, the same name and the same code | symbol shall be attached | subjected about the same structure as 1st and 2nd embodiment, or the corresponding structure, and refer to 1st embodiment about the same structure here. I will omit the explanation in, and explain only the opening assistance means.

  As shown in FIG. 5, the opening assisting means 4 according to the present embodiment includes a porous group 40 composed of a large number of holes h, and a notch 43 formed in the porous group 40.

  The porous group 40 is provided in a predetermined range including the outer edge of the connection region 2b as in the first embodiment. That is, the porous group 40 is formed in a range not reaching the boundary between the connection region 2b and the walls 2a and 2a (internal space SP) from the outer edge of the connection region 2b. The porous group 40 according to the present embodiment is provided in a rectangular region having the outer edge of the connection region 2b as one side.

  Each of the holes h constituting the porous group 40 passes through the connection region 2b. Each hole h only needs to be penetrated, and the hole shape is set to various shapes such as a dot shape (small-diameter circular shape), a cut shape (linear shape), a circular shape, and a polygonal shape. May be. In this embodiment, each hole h ... which comprises the porous group 40 is formed in dot shape (small diameter circular shape). And many holes h ... which comprise the porous group 40 are arrange | positioned so that it may concentrate as much as possible within a predetermined area | region according to hole size.

  The porous group 40 according to the present embodiment is composed of an aggregate of dot-shaped holes h, and the holes h are arranged in an aligned state. In addition, although many holes h ... may be arrange | positioned in a matrix form or zigzag form, you may arrange | position without regularity. And since the porous group 40 which concerns on this embodiment is comprised by the aggregate | assembly of the dotted | punctate hole h ..., each hole h ... is formed by piercing the connection area | region 2b with a needle-shaped blade. Yes.

  The notch 43 is formed to taper toward the internal space SP side. In the present embodiment, the cutout portion 43 is formed in a triangular shape, and one side thereof is positioned on the outer edge side of the connection region 2b, and one vertex on the perpendicular to the one side is positioned on the inner space SP side. ing. More specifically, the notch 43 has the apex located at the center in the direction in which the outer edge of the connection region 2b extends in the region where the porous group 40 is formed (longitudinal direction of the wall sheet materials S1 and S1). ing.

  The notch 43 according to the present embodiment includes a boundary on the inner space SP side in the region where the porous group 40 is formed and a boundary on the outer edge side of the connection region 2b in the region where the porous group 40 is formed (outer edge of the connection region 2b). It is formed not to reach. That is, the notch 43 is located on the outer edge side of the connection region 2b with respect to the inner space SP side boundary in the region where the porous group 40 is formed, and the edge (the one side) on the outer edge side of the connection region 2b. In the region where the porous group 40 is formed, it is located closer to the inner space SP than the boundary on the outer edge side of the connection region 2b (the outer edge of the connection region 2b).

  The notch 43 is a boundary on one end side in the longitudinal direction of the walls 2a, 2a in the region where the porous group 40 is formed, and on the other end side in the longitudinal direction of the walls 2a, 2a in the region where the porous group 40 is formed. It is formed between the boundaries. The cutout 43 according to the present embodiment is located on the inner side of the connection region 2b with respect to one end side in the longitudinal direction of the walls 2a and 2a in the region where the porous group 40 is formed in one end of the one side. The other end is located inside the connection region 2b with respect to the boundary of the other end side in the longitudinal direction of the walls 2a and 2a in the region where the porous group 40 is formed.

  The packaging bag 1 according to the present embodiment is as described above, and the operation of the opening assisting means 4 at the time of opening the packaging bag 1 having the above configuration will be described.

  In opening the packaging bag 1 having the above-described configuration, both sides (two locations) of the opening assisting means 4 (porous group 40) in the connection region 2b on either one end side in the width direction are gripped and pulled in different directions. Then, the porous group 40 is cut in a chain manner like a perforation. That is, since the packaging bag 1 having the above-described structure is provided with a large number of holes h (porous group 40), the space between the holes h (substance) is more fragile than the other parts. By simply applying a force, the holes h in a plurality of places are cut in a chain manner like perforations. And after the porous group 40 is cut | disconnected in a chain | linkage, a cutting | disconnection position reaches | attains any part which exists in the outer edge side of the notch part 43. FIG. That is, the notch 43 is formed in a triangular shape so as to taper toward the inner space SP side, so that the edge on the outer edge side of the connection region 2b intersects the cutting direction (the width direction of the connection region 2b). Therefore, even if the cutting position is shifted in the extending direction of the outer edge of the connection region 2b at the time of opening, the cutting position reaches any part of the notch 43.

  If it does so, a tension | pulling effect will act on the vertex of the notch part 43 in the internal space SP side intensively. And since the notch 43 exists in the porous group 40, the packaging bag 1 of the said structure has the porous group 40 in the interior space SP side rather than the vertex of the notch 43, and is concentrated on the vertex of the notch 43. Even if the pulling force acting on is small, the portion starts to be cut as the starting point of the cutting position (the point of action of the pulling force necessary for cutting). Then, the cutting position continuously changes toward the inner space SP side (the outer edge on the opposite side) and is cut (sliced) smoothly.

  Therefore, the packaging bag 1 having the above-described configuration can be cut smoothly without stepwise application of tensile forces having different sizes over the entire length in the cutting direction.

  It should be noted that the present invention is not limited to any of the above-described embodiments, and it goes without saying that modifications can be made as appropriate without departing from the gist of the present invention.

  In each of the above embodiments, the opening assisting means 4 is provided in each connection region 2b at both ends in the width direction. However, the present invention is not limited to this, for example, the connection region 2b at one end in the width direction. The opening assisting means 4 may be provided only in the case.

  In each said embodiment, although demonstrated on the assumption of the packaging bag 1 provided with the bottom part 3, the packaging bag 1 which this invention makes object is not limited to this, The sheet | seat material S1 for wall which was piled up was not limited to this. Of course, it may be the packaging bag 1 in which the ends of S1 are directly connected to form the bottom.

  In each said embodiment, although the packaging bag 1 which overlap | superposed two wall sheet materials S1 and S1 and connected the both ends of the width direction of each other was demonstrated, the packaging bag which this invention makes object is this. For example, it is a packaging bag 1 in which an inner space SP for accommodating a material to be accommodated P is formed by folding a sheet material S1 in two and connecting opposite ends. Of course.

  In each of the embodiments described above, liquid foods such as beverages and soup stocks are targeted as the objects to be contained P, but the present invention is not limited to this, and may be solid foods or daily necessities other than foods. It may be. Moreover, in each said embodiment, although wall part 2a, 2a (wall sheet material S1, S1) was comprised with the laminated sheet which has gas-barrier property in order to prevent the oxidation of liquid foods, such as a drink, it is limited to this. What is necessary is just to select sheet material S1, S1 suitably according to the characteristic of the to-be-contained object P to accommodate.

  In each said embodiment, although connected by heat-sealing the edge parts of wall sheet material S1, S1, connection of sheet material S1, S1 is not limited to this, It connects using an adhesive agent. May be. However, it goes without saying that the areas connected to each other (connection area 2b) have a predetermined width (width in which the opening assisting means 4 can be disposed).

  In each of the above embodiments, only the opening assisting means 4 is provided as a means for assisting opening. However, the present invention is not limited to this. For example, the walls 2a and 2a (wall sheet materials S1 and S1) are half-finished. A cutting auxiliary line such as a cut may be formed to extend in the width direction. In this case, the cutting position at the time of opening may be corrected to the position corresponding to the arrangement of the cutting auxiliary line by the cuts 41 and 42 and the notch 43 of the opening assisting means 4. That is, when the opening assisting means 4 according to the first embodiment is employed, one end of the first insertion portion 41a is arranged corresponding to the cutting auxiliary line, and the opening assisting means 4 according to the second embodiment is employed. When doing so, one end of the notch 42 is arranged corresponding to the cutting auxiliary line, and when the opening assisting means 4 according to the third embodiment is adopted, the apex of the notch 43 is made to correspond to the cutting auxiliary line. What is necessary is just to arrange.

  In the first embodiment, the second cut portion 41b is formed in a straight line so as to be perpendicular or substantially perpendicular to the first cut portion 41a, but is not limited to this. For example, As shown in FIGS. 6A and 6B, the second cut portion 41b may be formed such that both sides of the midway position are inclined toward the inner space SP side. That is, the second cut portion 41b may be formed in a bent shape (a shape of a dog). And in the said embodiment, although the 2nd notch part 41b was connected to the other end of the 1st notch part 41a, it is not limited to this, For example, as shown to Fig.6 (a), 1st Even if the second cut portion 41b is connected to one end of the cut portion 41a, or the second cut portion 41b is connected to the middle position of the first cut portion 41a as shown in FIG. 6B. Good. In this case, it is preferable that the first insertion portion 41a is connected to the vertex of the second cut portion 41b formed by being bent.

  In the first embodiment, the second cut portion 41b is formed so as to extend between the boundaries of the region where the porous group 40 is formed, and both ends thereof are positioned in the vicinity of each boundary. However, the present invention is not limited to this. What is necessary is just to set the length of the 2nd notch part 41b suitably as needed. However, it goes without saying that the second cut portion 41 b is located in the porous group 40. Further, the notches 41 (the first notches 41 a and the second notches 41 b) may be positioned on the boundary of the porous group 40 as long as they do not exceed the porous group 40.

  In the first embodiment, each of the first insert portion 41a and the second cut portion 41b is formed in a straight line, but is not limited to this. For example, the first insert portion 41a and the second insert portion 41b At least one of the cut portions 41b may be formed in a wavy line shape or an arcuate curve.

  In the second embodiment, the ends of the pair of cuts 42 and 42 are connected to each other. However, the present invention is not limited to this. For example, as shown in FIG. 7, the ends of the pair of cuts 42 and 42 are not connected to each other. It may be in a state. However, in order to correct the cutting position to an appropriate position, it is preferable that one end of the pair of cuts 42 and 42 be as close as possible.

  Moreover, in said 2nd embodiment, although each of a pair of notches 42 and 42 was made symmetrical, it is not limited to this, Each may be asymmetrical arrangement | positioning. In addition, the pair of cuts 42 and 42 are formed in a straight line, but the present invention is not limited to this. For example, the cuts 42 may be formed in a wavy line or an arcuate curve.

  In the third embodiment, the notch 43 is formed in a triangular shape. However, the present invention is not limited to this. For example, as shown in FIG. As shown in FIG. 8B, the notch 43 may be formed in a pentagonal shape (home base shape). That is, the notch 43 may be formed in a polygonal shape that is equal to or greater than a triangle. In this case, any one vertex formed on the outer periphery of the polygonal shape may be arranged on the inner space SP side. Moreover, the notch part 43 is not limited to polygonal shape, For example, the hole by which the inner space SP side makes circular arc shape may be sufficient, for example. In other words, the notch 43 may have a form in which the opening width becomes narrower toward the internal space SP.

  In each of the above embodiments, the porous group 40 is arranged in a rectangular region, but the present invention is not limited to this. For example, as shown in FIGS. 9 (a) and 9 (b), the porous group 40 is formed. You may arrange | position in a triangular area | region. In this case, the porous group 40 may be arranged so that one side constituting the outer periphery of the triangular region is positioned on the outer edge of the connection region 2b. In this case, as shown in FIG. 9A, when the cut 41 described in the first embodiment (the cut 41 provided with the first cut portion 41a and the second cut portion 41b) is employed, the internal space You may form so that the 2nd notch part 41b may be followed along the edge by the side of internal space SP of the formation area of the porous group 40 which narrows toward the SP side. The same applies to the case where the pair of cuts 42 described in the second embodiment is employed. Then, as shown in FIG. 9B, when the notch 43 (polygonal notch 43) described in the third embodiment is employed, the inside of the formation region of the porous group 40 that narrows toward the inner space SP side. The notch 43 may be formed along the edge on the space SP side.

  DESCRIPTION OF SYMBOLS 1 ... Packaging bag, 2a ... Wall part, 3 ... Bottom part, 4 ... Opening assistance means, 40 ... Porous group, 41a ... First notch part, 41b ... Second notch part, 42 ... Notch, 43 ... Notch part, 2b ... Connection region, P ... Contained object, S1 ... Wall sheet material (sheet material), S2 ... Bottom sheet material

Claims (5)

The end portions of the overlapped sheet materials are connected with a predetermined width to form an internal space for accommodating an object to be accommodated, and the unsealing serving as an unsealing start point at a predetermined position in a connection region where the end portions of the sheet materials are connected to each other In the packaging bag provided with the auxiliary means, the opening assistance means includes a porous group composed of a large number of holes, and a notch that is formed only in the porous group and penetrates the connection region. Is provided within a predetermined range including the outer edge of the connection region, and the incision includes a first insertion portion that extends toward the inner space with the outer edge side of the connection region as a base end, and the first insertion portion. It is comprised with the 2nd notch part extended in the direction which intersects each of the extending direction and the cutting direction of a sheet material, and the 1st notch part is connected to the middle position of the 2nd notch part And packaging bag.   The packaging bag according to claim 1, wherein the second cut portion is formed so as to be perpendicular or substantially perpendicular to the first cut portion.   The packaging bag according to claim 1, wherein the second cut portion is formed so that both sides of the intermediate position are inclined toward the inner space side. The end portions of the overlapped sheet materials are connected with a predetermined width to form an internal space for accommodating an object to be accommodated, and the unsealing serving as an unsealing start point at a predetermined position in a connection region where the end portions of the sheet materials are connected to each other In the packaging bag provided with the auxiliary means, the opening auxiliary means includes a porous group composed of a large number of holes, and a pair of cuts formed only in the porous group and penetrating the connection region , The porous group is provided within a predetermined range including the outer edge of the connection region, and the pair of cuts are in a direction intersecting the cutting direction of the sheet material toward the inner space side with the outer edge side of the connection region as a base end. The packaging bag is characterized in that the packaging bag is formed so as to extend toward the inner space and approach each other toward the inner space side. The end portions of the overlapped sheet materials are connected with a predetermined width to form an internal space for accommodating an object to be accommodated, and the unsealing serving as an unsealing start point at a predetermined position in a connection region where the end portions of the sheet materials are connected to each other In the packaging bag provided with the auxiliary means, the opening auxiliary means includes a porous group composed of a large number of holes, and a notch formed only in the porous group and penetrating through the connection region. The group is provided within a predetermined range including the outer edge of the connection region, and the cutout portion is formed so as to taper in the cutting direction of the sheet material toward the inner space side.

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