Patent Description:
In recent years, there is a tendency that daily necessities which can be used for a long period of time and have a high accommodating property and stocking property are favored due to changes in lifestyles of consumers. For sanitary thin paper such as a kitchen towel, a lot of long length products in which a roll length of a roll is increased have been developed. For example, in a long length kitchen towel, it takes a certain amount of time to use up one kitchen towel. In addition, since foodstuff is handled in a kitchen in a lot of occasions, there is a need for a packaging bag that can hygienically store the kitchen towel. In addition, when the packaging bag for the kitchen towel is torn, the packaging bag may not be neatly torn in many cases, and there is also a demand for a packaging film that is easy to open.

For example, <CIT> (Patent Document <NUM>) discloses a package for packaging roll-shaped kitchen paper. In this package, a perforation for opening is provided in a vertical direction on a front surface of the package.

Further, each of <CIT>, <CIT>, <CIT>, <CIT>, <CIT> and <CIT> discloses a packaging bag.

However, in the conventional packaging bag, a user may forcibly open the packaging bag from a place where the perforation is not provided without knowing a place where the perforation is provided or how to open the packaging bag. For this reason, a strong force is required to open the packaging bag, which is difficult for some users. In addition, since an opening location and a state after opening differ depending on the user, it may be difficult to take out a product from the packaging bag after opening. Furthermore, even in the case of opening along a perforation for opening, a handle portion or a body of the packaging bag tends to be torn over a wide range, and the remaining product may not be stored cleanly in the packaging bag after opening in some cases.

An object of the invention is to provide a packaging bag excellent in openability, a take-out property, and storability after opening.

An aspect of the invention is a packaging bag including a body for storing a plurality of articles to be packaged, in which the body has a top surface part, a bottom surface part facing the top surface part in a vertical direction, and a plurality of lateral surface parts disposed between the top surface part and the bottom surface part, a slash part for opening is provided on at least one of the plurality of lateral surface parts, and the slash part includes a first slit extending in the vertical direction from a point of the lateral surface adjacent to the top surface part to another point of the lateral surface adjacent to the bottom surface part, and a second slit extending continuously with one end of the first slit on a side of the top surface part in a travers direction perpendicular to the vertical direction, a third slit which is continuous with the other end of the first slit on a side of the bottom surface part, faces the second slit in the vertical direction, and extends in the traverse direction. According to the present invention, the length of the third slit is shorter than the length of the second slit and in that an adhesive portion is provided on the lateral surface part on an opposite side from the second slit with respect to the first slit.

According to an aspect of the invention, it is possible to provide a packaging bag excellent in openability, a take-out property, and storability after opening.

Hereinafter, embodiments of the invention will be described in detail with reference to the drawings. Note that in this specification, to facilitate understanding, the scale of each member in each drawing may differ from the actual scale. Further, in the following description, common parts in each drawing are denoted by the same reference numerals, and description thereof may be omitted.

In addition, in this specification, one side in a vertical direction (height direction) of a packaging bag may be referred to as "up" or an upper side, and the other side may be referred to as "down" or a lower side. In addition, a three-dimensional orthogonal coordinate system in <NUM>-axis directions (X direction, Y direction, and Z direction) is used. A width direction (left-right direction or lateral direction orthogonal to the vertical direction) of the packaging bag is defined as the X direction, a depth direction (direction perpendicular to the left-right direction) of the packaging bag is defined as the Y direction, and the height direction (vertical direction) of the packaging bag is defined as the Z direction.

<FIG> is a diagram illustrating a packaging bag according to a first example which does not fall into the scope of claim <NUM> but may be useful for understanding the present invention. In addition, <FIG> is a diagram illustrating a state (before opening) in which a handle portion is raised while articles to be packaged are stored (accommodated) in <FIG>. In <FIG>, a packaging bag <NUM> includes a body <NUM>, a handle portion <NUM>, and a finger hook <NUM>. The packaging bag <NUM> is manufactured using a bag-making machine from a resin film, etc. The packaging bag <NUM> is an example of a packaging bag. In addition, the body <NUM> is an example of a body included in the packaging bag.

As illustrated in <FIG>, the body <NUM> is included in a body of the packaging bag <NUM> in which a plurality of articles to be packaged P is stored. The body <NUM> is made of a tubular film obtained by forming a resin film into a tubular shape, and has a structure in which the tubular film is folded in a gusset shape to form a bag shape (see <FIG>).

A material of the tubular film (resin film) forming the body <NUM> is arbitrary. As such a resin film, for example, it is possible to use a resin film such as polyethylene (PE) or a stacked body (PE/EVOH/PE) of PE-ethylene vinyl alcohol copolymer (EVOH)-PE. In addition, a thickness of the resin film is arbitrary. For example, when PE or PE/EVOH/PE is used as the resin film, the thickness of the resin film can be set to <NUM> to <NUM>, preferably <NUM> to <NUM>, and more preferably <NUM> to <NUM>.

A plurality of (four) pieces of roll-shaped kitchen paper is stored in the body <NUM> as an example of the articles to be packaged P (see <FIG>). The size of the article to be packaged P (kitchen paper) is not particularly limited. However, in the state of being stored in the packaging bag <NUM>, a height (roll width) in the vertical direction (Z direction) is preferably about <NUM> to <NUM>, and a width (roll diameter) in the traverse direction (X direction) is preferably about <NUM> to <NUM>.

In addition, each of the articles to be packaged P (kitchen paper) is obtained by winding a belt-shaped sheet around a paper tube HC (see <FIG>). Note that a form of the article to be packaged P is not limited to a roll shape, and the article to be packaged P may be stored in another form such as a stacked shape. Further, the articles to be packaged P stored in the body <NUM> are not limited to kitchen paper, and it is possible to store other articles such as toilet paper, tissue paper, baby or nursing disposable diapers, and sanitary napkins.

In addition, the number of articles stored in the body <NUM> is not particularly limited as long as a plurality of articles is stored, and may be two or three or more. In an example illustrated in <FIG>, four pieces of roll-shaped kitchen paper (articles to be packaged P1 to P4) arranged in one stage are stored in the body <NUM>. Note that arrangement of the articles to be packaged stored in the body <NUM> is not limited to this arrangement. For example, five or more pieces of kitchen paper (articles to be packaged P) in one stage may be stored in the body <NUM>.

The body <NUM> has a top surface part <NUM>, a bottom surface part <NUM>, a pair of first lateral surface parts <NUM>, and a pair of second lateral surface parts <NUM>. The top surface part <NUM> is formed on the upper side of the body <NUM>. The bottom surface part <NUM> is formed on the lower side of the body <NUM> and faces the top surface part <NUM> in the Z direction (vertical direction or height direction of the packaging bag <NUM>).

The pair of first lateral surface parts <NUM> is disposed between the top surface part <NUM> and the bottom surface part <NUM>, and has one lateral surface part 13a and the other lateral surface part 13b facing each other in the Y direction (the depth direction of the packaging bag <NUM>) (see <FIG> and <FIG>). In addition, the pair of second lateral surface parts <NUM> is disposed between the top surface part <NUM> and the bottom surface part <NUM>, and has one lateral surface part 14a and the other lateral surface part 14b facing each other in the X direction (the width direction of the packaging bag <NUM> or the left-right direction orthogonal to the vertical direction) (see <FIG> and <FIG>).

Note that the top surface part <NUM> is an example of a top surface part included in the body of the packaging bag according to the invention. In addition, the bottom surface part <NUM> is an example of a bottom surface part included in the body of the packaging bag according to the invention. Further, the pair of first lateral surface parts <NUM> and the pair of lateral surface parts <NUM> are an example of a plurality of lateral surface parts included in the body of the packaging bag according to the invention.

As illustrated in <FIG> and <FIG>, the handle portion <NUM> is provided on the top surface part <NUM> of the body <NUM>. The handle portion <NUM> is included in a portion of the packaging bag <NUM> grabbed (or held) by a hand or a finger (hereinafter referred to as a finger). The handle portion <NUM> can be formed of a resin film, etc. similarly to the body <NUM>. The handle portion <NUM> is integrally formed with the body <NUM> on a connection portion 11a of the top surface part <NUM> by a seal part (not illustrated) formed by heat sealing (heat seal).

Note that heat sealing (heat seal) for forming the seal part can be performed by, for example, a scheme (stamp scheme) in which the resin film folded in the gusset shape is embossed with a hot plate for forming a handle. In addition, an air hole (not illustrated) connecting the body <NUM> and the outside of the packaging bag <NUM> may be provided in the handle portion <NUM> so that the body <NUM> to which the handle portion <NUM> is attached does not tear during manufacturing or distribution of the packaging bag <NUM>.

The handle portion <NUM> is further provided with the finger hook <NUM> for hooking the finger when holding the handle portion <NUM>. The finger hook <NUM> is formed in a center part of the handle portion <NUM> in the left-right direction (X direction). In addition, the finger hook <NUM> is formed by two elliptical slits disposed at a predetermined interval in the left-right direction (X direction). The slits may have any form. For example, perforations may be formed, and the finger hooks may be formed by breaking the perforations.

Note that a shape of the finger hook <NUM> is not limited to an elliptical shape, and may be a linear shape, a curved shape, a circular shape, an oval shape, a rectangular shape, etc. or shapes similar to these shapes. Further, even though the finger hook <NUM> is formed by two slits, the number of slits is not limited. Therefore, the finger hook <NUM> may be formed by one slit or three or more slits.

Further, the finger hook <NUM> can be disposed in the handle portion <NUM> while being surrounded by a heat seal (not illustrated). The heat seal can be formed by heat sealing as in the case of forming the handle portion <NUM>. The finger hook <NUM> can be disposed inside the heat seal and apart from the heat seal.

In addition, the handle portion <NUM> may be provided with a reinforcing film (not illustrated) that reinforces a portion of the handle portion <NUM> where the finger hook <NUM> is provided. A mode of such a reinforcing film is arbitrary. However, it is preferable that the reinforcing film is attached to the handle portion <NUM> by heat sealing (heat seal) as in the case of forming the handle portion <NUM>. In addition, the reinforcing film can be formed of a belt-shaped resin film. A material of the reinforcing film may be the same as or different from the material of the resin film forming the handle portion <NUM>. A thickness dimension of the reinforcing film is arbitrary. For example, from a viewpoint of preventing the handle portion <NUM> from extending or breaking, the thickness is preferably set to <NUM> or more.

As illustrated in <FIG> and <FIG>, the packaging bag <NUM> according to the first example is provided with a slash part S (hereinafter referred to as a slash part S for opening) for opening the packaging bag <NUM> on one lateral surface part <NUM> (hereinafter referred to as the lateral surface part 13a) of the pair of first lateral surface parts <NUM> on a side where the packaging bag <NUM> is viewed from the front surface. Note that the lateral surface part 13a in which the slash part S for opening is provided is an example of at least one of the plurality of lateral surface parts included in the body of the packaging bag.

Note that a form of the slash part S formed in the lateral surface part 13a is arbitrary. For example, the slash part S may be formed by a notch such as a perforation. In the first example, the slash part S is formed by a perforation, and a notch is formed by breaking the perforation. Note that in the first example, as illustrated in <FIG> and <FIG>, the perforation forming the slash part S is indicated by a broken line.

The slash part S further has a first slit <NUM>, a second slit <NUM>, and a third slit <NUM>. As illustrated in <FIG> and <FIG>, the first slit <NUM> extends in the vertical direction (Z direction) from near the top surface part <NUM> to near the bottom surface part <NUM> of the body <NUM> in the packaging bag <NUM>. That is, the first slit <NUM> is formed to extend over substantially the entire region of the lateral surface part 13a of the body <NUM> of the packaging bag <NUM> in the vertical direction.

In addition, as illustrated in <FIG>, the first slit <NUM> is formed in the lateral surface part 13a along a boundary BP between at least two adjacent articles to be packaged P (articles to be packaged P1 and P2) among a plurality of articles to be packaged P (articles to be packaged P1 to P4). According to such a configuration, the first slit <NUM> is provided along the boundary BP between the articles to be packaged P1 and P2 with respect to the lateral surface part 13a in contact with two articles to be packaged P1 and P2 adjacent to each other in the state of being stored in the packaging bag <NUM> (see <FIG>).

In addition, in the first example, a length L1 of the first slit <NUM> is a length from the vicinity of the top surface part <NUM> to the vicinity of the bottom surface part <NUM> in the vertical direction (Z direction). Note that an upper limit of a ratio of the length L1 of the first slit <NUM> (hereinafter referred to as a ratio L1) in the case of setting a width W2 of the article to be packaged P (article to be packaged P1) in the vertical direction (Z direction) is <NUM>% can be set to <NUM>% or less. In addition, a lower limit of the ratio L1 is preferably <NUM> or more, more preferably <NUM>% or more, further preferably <NUM>% or more (see <FIG>).

In addition, the length L1 of the first slit <NUM> can be specified from a distance D1 between the second slit <NUM> and the top surface part <NUM> in the vertical direction (Z direction) and a distance D2 between the third slit <NUM> and the bottom surface part <NUM> in the vertical direction (Z direction).

Note that a lower limit of a ratio of the distance D1 between the second slit <NUM> and the top surface part <NUM> (hereinafter referred to as a ratio D1) in the case of setting the width W2 of the article to be packaged P (article to be packaged P1) in the vertical direction (Z direction) to <NUM>% can be set to <NUM>% or more. In addition, an upper limit of the ratio D1 is preferably less than <NUM>%, more preferably less than <NUM>%, and further preferably less than <NUM>% (see <FIG>).

In addition, a lower limit of a ratio of the distance D2 between the third slit <NUM> and the bottom surface part <NUM> (hereinafter referred to as a ratio D2) in the case of setting the width W2 of the article to be packaged P (article to be packaged P1) in the vertical direction (Z direction) to <NUM>% can be set to <NUM>% or more. In addition, an upper limit of the ratio D2 is preferably less than <NUM>%, more preferably less than <NUM>%, and further preferably less than <NUM>% (see <FIG>).

In addition, as illustrated in <FIG> and <FIG>, in the packaging bag <NUM>, the second slit <NUM> is continuous with one end 40a of the first slit <NUM> on the top surface part <NUM> side, and extends in the traverse direction (X direction) intersecting the vertical direction (Z direction). Specifically, the second slit <NUM> is formed to be continuous with the first slit <NUM> and extend in the traverse direction (X direction) orthogonal to the vertical direction (Z direction) from the one end 40a of the first slit <NUM> on the top surface part <NUM> side.

In addition, the length L2 of the second slit <NUM> is the same as or shorter than the width W1 of one article to be packaged P (article to be packaged P1) in the traverse direction (X direction). In the first example, the length L2 of the second slit <NUM> is shorter than the width W1 of the article to be packaged P1 stored in the packaging bag <NUM> in the traverse direction (X direction) (see <FIG>). In the first example, when the length L2 of the second slit <NUM> is set to be the same as or shorter than the width W1 of the article to be packaged P1 in the state of being stored in the packaging bag <NUM> in the traverse direction (X direction), a width of an opening hole OP formed after opening the packaging bag <NUM> in the traverse direction (X direction) on the top surface part <NUM> side becomes less than or equal to the width W1 of the article to be packaged P1 in the state of being stored in the packaging bag <NUM> in the traverse direction (X direction).

Note that an upper limit of a ratio of the length L2 of the second slit <NUM> (hereinafter referred to as a ratio L2) in the case of setting the width W1 of the article to be packaged P (article to be packaged P1) in the traverse direction (X direction) to <NUM>% can be set to <NUM>% or less, and is preferably <NUM>% or less, and more preferably <NUM>% or less. In addition, a lower limit of the ratio L2 can be set to be greater than <NUM>%, and is preferably greater than <NUM>%, and more preferably greater than <NUM>%.

Furthermore, as illustrated in <FIG> and <FIG>, in the packaging bag <NUM>, the third slit <NUM> is continuous with the other end 40b of the first slit <NUM> on the bottom surface part <NUM> side and faces the second slit <NUM> in the vertical direction (Z direction) to extend in the traverse direction (X direction). Specifically, the third slit <NUM> is formed to be continuous with the first slit <NUM> and extend in the traverse direction (X direction) orthogonal to the vertical direction (Z direction) from the other end 40b of the first slit <NUM> on the bottom surface part <NUM> side.

In addition, a length L3 of the third slit <NUM> is also the same as or shorter than the width W1 of one article to be packaged P (article to be packaged P1) in the traverse direction (X direction). In the first example, the length L3 of the third slit <NUM> is shorter than the width W1 of the article to be packaged P1 stored in the packaging bag <NUM> in the traverse direction (X direction) (see <FIG>). In the first example, when the length L3 of the third slit <NUM> is set to be the same as or shorter than the width W1 of the article to be packaged P1 stored in the packaging bag <NUM> in the traverse direction (X direction), the width of the opening hole OP having a rectangular shape described below in the traverse direction (X direction) becomes less than or equal to the width W1 of the article to be packaged P1 stored in the packaging bag <NUM> in the traverse direction (X direction) (see <FIG>).

Note that an upper limit of a ratio of the length L3 of the third slit <NUM> (hereinafter referred to as a ratio L3) in the case of setting the width W1 of the article to be packaged P (article to be packaged P1) in the traverse direction (X direction) to <NUM>% can be set to <NUM>% or less, and is preferably <NUM>% or less, and more preferably <NUM>% or less. In addition, a lower limit of the ratio L3 can be set to <NUM>% or more.

Further, in the first example, an adhesive portion <NUM> is provided on the lateral surface part 13a on the opposite side from the second slit <NUM> with respect to the first slit <NUM>. Here, when the lateral surface part 13a is divided into a region where the second slit <NUM> is provided and a region where the second slit <NUM> is not provided based on the first slit <NUM>, the opposite side from the second slit <NUM> with respect to the first slit <NUM> refers to the region where the second slit <NUM> is not provided.

A position at which the adhesive portion <NUM> is provided is not particularly limited as long as the position is on the opposite side from the second slit <NUM> with respect to the first slit <NUM> on the lateral surface part 13a. However, the position is preferably at a center part of the lateral surface part 13a in the vertical direction (Z direction). In addition, the position at which the adhesive portion <NUM> is provided is not limited to the lateral surface part 13a. The position may be set to a position at which a broken piece FG described below is attached to an outer periphery of the body <NUM> of the packaging bag <NUM> when the lateral surface part 13a (the outer periphery of the body <NUM> of the packaging bag <NUM>) is covered with the broken piece FG.

In addition, the number of adhesive portions <NUM> is not limited to one, and a plurality of adhesive portions <NUM> may be provided depending on the range of covering the body <NUM> of the packaging bag <NUM>. Further, a mode of the adhesive portion <NUM> is not particularly limited. For example, a commercially available pressure-sensitive adhesive may be applied to the lateral surface part 13a, or a sticker to which the pressure-sensitive adhesive is applied in advance may be attached to the lateral surface part 13a. Note that the adhesive portion <NUM> is an example of an adhesive portion provided on the body of the packaging bag.

Here, the case of opening the packaging bag <NUM> of the first example will be described with reference to <FIG>. In the first example, as described above, the slash part S including the first slit <NUM>, the second slit <NUM>, and the third slit <NUM> is provided on the lateral surface part 13a of the body <NUM> of the packaging bag <NUM> (see <FIG>). In this way, in the packaging bag <NUM> of the first example, since the U-shaped slash part S is disposed at a conspicuous position of the lateral surface part 13a of the body of the packaging bag <NUM>, it is easy to find a place where the packaging bag <NUM> is opened.

In addition, in the first example, since the length L1 of the first slit <NUM> is a length from near the top surface part <NUM> to near the bottom surface part <NUM> in the vertical direction (Z direction), the first slit <NUM> can be broken in the vertical direction (Z direction) with a small force when opening the packaging bag <NUM>. In addition, when the first slit <NUM> is broken, the second slit <NUM> on the top surface part <NUM> side and the third slit <NUM> on the bottom surface part <NUM> side are further broken continuously with the first slit <NUM> in the traverse direction (X direction). In this way, in the first example, the rectangular opening hole OP and the broken piece FG can be formed on the lateral surface part 13a of the body <NUM> (see <FIG>). Therefore, the packaging bag <NUM> of the first example has excellent openability.

In addition, in the first example, as described above, the length L1 of the first slit <NUM> in the vertical direction (Z direction) is the length from near the top surface part <NUM> to near the bottom surface part <NUM>. For this reason, the length of the first slit <NUM> in the vertical direction (Z direction) is approximately the same as the height of the article to be packaged P in the state of being stored in the packaging bag <NUM> (see <FIG>). In addition, as described above, the length of the rectangular opening hole OP formed on the lateral surface part 13a of the body <NUM> in the vertical direction (Z direction) becomes approximately the same as the height of the article to be packaged P in the state of being stored in the packaging bag <NUM> (see <FIG>). For this reason, in the packaging bag <NUM> of the first example, it is easy to take out the stored articles to be packaged P, and the product take-out property is excellent (see <FIG> and <FIG>).

In addition, in the first example, since the length L1 of the first slit <NUM> is the length from near the top surface part <NUM> to near the bottom surface part <NUM> in the vertical direction (Z direction) as described above, the length L1 of the first slit <NUM> becomes shorter than the length of the article to be packaged P stored in the packaging bag <NUM> in the vertical direction (Z direction) (see <FIG>). In this way, in the first example, both end portions of the article to be packaged P in the vertical direction (Z direction) can be pressed by parts 13c and 13d of the lateral surface part adjacent to an upper end and a lower end of the opening hole OP formed after opening the packaging bag <NUM> (see <FIG>). Therefore, in the packaging bag <NUM> of the first example, it is possible to prevent the article to be packaged P (article to be packaged P1) from coming off from the opening hole OP after the packaging bag <NUM> is opened.

In addition, in the first example, as illustrated in <FIG>, at the same time as the rectangular opening hole OP is formed on the lateral surface part 13a of the body <NUM>, the broken piece FG (part of the lateral surface part 13a of the body <NUM> formed (or turned up) by breaking the slash part S) is formed. The broken piece FG is formed by a part of the lateral surface part 13a of the body <NUM> formed by breaking the slash part S. Then, the shape of the broken piece FG becomes a rectangular shape corresponding to the shape of the opening hole OP (see <FIG>).

In the first example, as illustrated in <FIG>, after taking out some (article to be packaged P1) of the articles to be packaged P, it is possible to cover the lateral surface part 13a (the outer periphery of the body <NUM> of the packaging bag <NUM>) with the rectangular broken piece FG as illustrated in <FIG>. In this way, the opening hole OP can be closed (or blocked), and the remaining articles to be packaged P2 to P4 can be protected from dirt and dust (dirt, dust, mote, etc.) after opening the packaging bag <NUM> (see <FIG>).

In addition, in the first example, the adhesive portion <NUM> is provided on the lateral surface part 13a (see <FIG>). For this reason, as described above, when the outer periphery of the body <NUM> of the packaging bag <NUM> is covered with the broken piece FG of the packaging bag <NUM> after taking out some (article to be packaged P1) of the articles to be packaged P from the packaging bag <NUM>, it is possible to attach the broken piece FG of the packaging bag <NUM> to the adhesive portion <NUM> (see <FIG>). In this way, after opening the packaging bag <NUM>, the packaging bag <NUM> can be hermetically sealed, and the remaining articles to be packaged P (articles to be packaged P2 to P4) stored in the packaging bag <NUM> can be bundled (see <FIG>).

Further, as illustrated in <FIG> and <FIG>, after taking out some (article to be packaged P2) of the articles to be packaged P, the outer periphery of the body <NUM> of the packaging bag <NUM> can be covered with the rectangular broken piece FG as illustrated in <FIG>. In this way, the opening hole OP can be closed (or blocked), and the remaining articles to be packaged P3 and P4 can be protected from dirt and dust after opening the packaging bag <NUM> (see <FIG>). In addition, by attaching the broken piece FG of the packaging bag <NUM> to the adhesive portion <NUM>, it is possible to bundle the remaining articles to be packaged P (articles to be packaged P3 and P4) stored in the packaging bag <NUM> while hermetically sealing the packaging bag <NUM> after opening (see <FIG>).

Similarly, as illustrated in <FIG>, after taking out some (article to be packaged P3) of the articles to be packaged P, the outer periphery of the body <NUM> of the packaging bag <NUM> can be covered with the rectangular broken piece FG as illustrated in <FIG>. In this way, the opening hole OP can be closed (or blocked), and the remaining article to be packaged P4 can be protected from dirt and dust after opening the packaging bag <NUM>. In addition, by attaching the broken piece FG of the packaging bag <NUM> to the adhesive portion <NUM>, it is possible to hermetically seal the packaging bag <NUM> after opening in which the last remaining one (article to be packaged P4) of the articles to be packaged P is stored (see <FIG>). In this way, the packaging bag <NUM> of the first example is excellent in storability after opening (see <FIG>).

In addition, in the first example, the first slit <NUM> is formed along the boundary BP between the articles to be packaged P1 and P2 with respect to the lateral surface part 13a in contact with the two adjacent articles to be packaged P1 and P2 in the state of being stored in the packaging bag <NUM>. In this way, when the packaging bag <NUM> is opened, the finger H is easily caught on the first slit <NUM>, and thus the first slit <NUM> is easily broken (see <FIG>, <FIG>, and <FIG>). Further, the end portion of the broken piece FG formed when the first slit <NUM> is broken is easily grabbed, and the second slit is easily broken (see <FIG>). Therefore, the packaging bag <NUM> of the first example is more excellent in the openability.

Note that when the plurality of articles to be packaged P is roll-shaped kitchen paper as in the first example, a space SP is formed between the articles to be packaged P1 and P2 and the lateral surface part 13a along the boundary BP between the two adjacent articles to be packaged P1 and P2 (see <FIG> and <FIG>). In this case, by forming the first slit <NUM> along the boundary BP between the articles to be packaged P1 and P2, it is possible to dispose the first slit <NUM> with respect to the space SP between the articles to be packaged P1 and P2 and the lateral surface part 13a (see <FIG> and <FIG>).

In this way, when a plurality of pieces of roll-shaped kitchen paper is stored in the packaging bag <NUM> as the articles to be packaged P, it is possible to easily break the first slit <NUM> by simply pressing the lateral surface part 13a facing the boundary BP between the articles to be packaged P1 and P2 with a finger. For this reason, in the first example, when the packaging bag <NUM> is opened, the first slit <NUM> can be reliably broken in the vertical direction (Z direction) with a small force.

In addition, in the first example, as described above, when the length L2 of the second slit <NUM> is set to be less than or equal to the width W1 of one article to be packaged P in the traverse direction (X direction), the width of the opening hole OP, which is formed after opening the packaging bag <NUM>, in the traverse direction (X direction) on the top surface part <NUM> side becomes less than or equal to the width W1 of the article to be packaged P1 in the state of being stored in the packaging bag <NUM> in the traverse direction (X direction). In this way, in the first example, while ensuring a region in the opening hole OP for taking out the articles to be packaged P, it is possible to press the articles to be packaged P by parts 13e and 13f of the lateral surface part 13a adjacent to the opening hole OP in the traverse direction (X direction). Therefore, according to the first example, it is possible to further prevent the articles to be packaged P from coming off from the opening hole OP after the packaging bag <NUM> is opened.

Further, in the first example, as described above, when the length L3 of the third slit <NUM> is shortened to the width W1 or less of the articles to be packaged P stored in the packaging bag <NUM> in the traverse direction (X direction), the width of the formed rectangular opening hole OP in the traverse direction (X direction) becomes less than or equal to the width W1 of the articles to be packaged P stored in the packaging bag <NUM> in the traverse direction (X direction). In this way, in the first example, it is possible to ensure a sufficient region in the opening hole OP for taking out the articles to be packaged P. Moreover, the articles to be packaged P can be pressed by the parts 13c and 13d of the lateral surface part adjacent to both end portions of the rectangular opening hole OP formed after opening the packaging bag <NUM> in the vertical direction (Z direction) and the parts 13e and 13f of the lateral surface part adjacent to the both end portions in the traverse direction (X direction). Therefore, the packaging bag <NUM> of the first example can reliably prevent the articles to be packaged P from coming off from the opening hole OP while improving the take-out property of the articles to be packaged P.

<FIG> is a diagram illustrating a packaging bag according to a second example which is not part of the invention. In a packaging bag <NUM> of the second example, in a configuration in which the second slit <NUM> continuous with the one end 40a of the first slit <NUM> on the top surface part <NUM> side extends in the traverse direction (X direction) intersecting the vertical direction (Z direction), one end of the second slit <NUM> connected to the one end 40a of the first slit <NUM> on the top surface part <NUM> side can be curved or inclined. In addition, in a configuration in which the third slit <NUM> continuous with the other end 40b of the first slit <NUM> on the bottom surface part <NUM> side extends in the traverse direction (X direction) intersecting the vertical direction (Z direction), one end of the third slit <NUM> connected to the other end 40b of the first slit <NUM> on the bottom surface part <NUM> side can be curved or inclined.

In the second example, the second slit <NUM> has a base portion <NUM> and a sloped portion <NUM> in which one end of the second slit <NUM> is inclined with respect to the base portion <NUM>. By adopting such a configuration, in the second example, a force in the vertical direction (Z direction) that breaks the first slit <NUM> when opening the packaging bag <NUM> becomes easy to be transmitted in the traverse direction (X direction) in which the second slit <NUM> is broken. For this reason, even when the second slit <NUM> is formed on the top surface part <NUM> side with respect to the first slit <NUM>, the packaging bag <NUM> can be opened with a smaller force. In addition, when the slash part S is broken from the first slit <NUM> to the second slit <NUM>, it is possible to prevent the slash part S from breaking in an unexpected direction.

In the second example, further, the third slit <NUM> has a base portion <NUM> and a sloped portion <NUM> in which one end of the third slit <NUM> is inclined with respect to the base portion <NUM>. By adopting such a configuration, in the second example, a force in the vertical direction (Z direction) that breaks the first slit <NUM> when opening the packaging bag <NUM> becomes easy to be transmitted in the traverse direction (X direction) in which the third slit <NUM> is broken. For this reason, even when the third slit <NUM> is formed on the bottom surface part <NUM> side with respect to the first slit <NUM>, the packaging bag <NUM> can be opened with a smaller force. In addition, when the slash part S is broken from the first slit <NUM> to the third slit <NUM>, it is possible to prevent the slash part S from breaking in an unexpected direction.

<FIG> is a diagram illustrating a packaging bag according to a third example and an embodiment of the invention. In a packaging bag <NUM> of the embodiment, as illustrated in <FIG>, the length L3 of the third slit <NUM> is shorter than the length L2 of the second slit <NUM>. In the embodiment, by setting the length L3 of the third slit <NUM> provided on the bottom surface part <NUM> side to be shorter than the length L2 of the second slit <NUM> provided on the top surface part <NUM> side, the width of the opening hole OP in the traverse direction (X direction) gradually decreases from the top surface part <NUM> side to the bottom surface part <NUM> side. In this way, the opening hole OP formed after opening the packaging bag <NUM> has a trapezoidal shape in which the bottom surface part <NUM> side is an upper bottom and the top surface part side is a lower bottom.

In the embodiment, by forming such a trapezoidal opening hole OP, it is possible to press both end portions of the articles to be packaged P in the traverse direction (X direction) by parts 13e and 13f of the lateral surface part 13a adjacent to both end portions of the trapezoidal opening hole OP formed after opening the packaging bag <NUM> in the traverse direction (X direction) while ensuring a sufficient region in the opening hole OP for taking out the articles to be packaged P. Therefore, the packaging bag <NUM> of the embodiment can reliably prevent the articles to be packaged P from coming off from the opening hole OP while maintaining the take-out property of the articles to be packaged P.

<FIG> is a diagram illustrating a packaging bag according to a fourth example which is not part of the invention. In a packaging bag <NUM> of the fourth example, as illustrated in <FIG>, the distance D2 between the third slit <NUM> and the bottom surface part <NUM> in the vertical direction (Z direction) is longer than the distance D1 between the second slit <NUM> and the top surface part <NUM> in the vertical direction (Z direction). In this way, in the fourth example, by setting the distance D2 between the third slit <NUM> and the bottom surface part <NUM> in the vertical direction (Z direction) to be longer than the distance D1 between the second slit <NUM> and the top surface part <NUM>, a wall portion WP for pressing the articles to be packaged P can be formed in the part 13d of the lateral surface part 13a adjacent to the end portion of the opening hole OP on the bottom surface part <NUM> side. In this way, it is possible to further prevent the articles to be packaged P from falling off from the opening hole OP formed after the packaging bag <NUM> is opened.

Note that when the distance D2 between the third slit <NUM> and the bottom surface part <NUM> in the vertical direction (Z direction) is set to be longer than the distance D1 between the second slit <NUM> and the top surface part <NUM>, the lower limit of the ratio D2 is preferably set to <NUM>% or more, more preferably <NUM>% or more, and further preferably <NUM>% or more. In addition, the upper limit of the ratio D2 is preferably set to be smaller than <NUM>%, more preferably smaller than <NUM>%, and further preferably smaller than <NUM>%.

<FIG> is a diagram illustrating a packaging bag according to a fifth example which is not part of the invention. In a packaging bag <NUM> of the fifth example, as illustrated in <FIG>, a curved portion <NUM> is formed at a center part 40c of the first slit <NUM>. The curved portion <NUM> has a shape protruding to the opposite side from the second slit <NUM> with respect to the first slit <NUM> (region of the lateral surface part 13a in which the second slit <NUM> is not provided) (curved in a convex shape). The packaging bag <NUM> of the fifth example has a configuration in which the curved portion <NUM> is further provided in the packaging bag <NUM> of the second example. Note that the curved portion <NUM> is an example of a curved portion of the first slit provided on the body of the packaging bag.

In the fifth example, by providing such a curved portion <NUM> at the center part 40c of the first slit <NUM>, the finger H is easily caught in the center part 40c of the first slit <NUM>, and the first slit <NUM> can be easily broken. In addition, after the first slit <NUM> is broken, a broken piece is formed at the center part 40c of the first slit <NUM> to correspond to the curved portion <NUM>. By grabbing the broken piece corresponding to the curved portion <NUM>, the second slit <NUM> and/or the third slit <NUM> can be easily broken. Therefore, excellent openability of the packaging bag <NUM> of the fifth example is further improved.

<FIG> is a diagram illustrating a packaging bag according to a sixth example which is not part of the invention. In a packaging bag <NUM> of the sixth example, as illustrated in <FIG>, the slash part S formed on the lateral surface part 13a further has a fourth slit <NUM>. In addition, the fourth slit <NUM> is continuous with the center part 40c of the first slit <NUM>, faces the second slit <NUM> in the vertical direction (Z direction), and extends in the traverse direction (X direction). That is, in the slash part S for opening provided on the lateral surface part 13a of the body <NUM> of the packaging bag <NUM>, further, the fourth slit <NUM> continuous with the center part 40c of the first slit <NUM> is formed to face the second slit <NUM> in the vertical direction (Z direction) and extend in the traverse direction (X direction).

In addition, a length L4 of the fourth slit <NUM> is also the same as or shorter than the width W1 of one article to be packaged P (article to be packaged P1) in the traverse direction (X direction). In the sixth example, the length L4 of the fourth slit <NUM> is shorter than the width W1 of the article to be packaged P1 stored in the packaging bag <NUM> in the traverse direction (X direction) (see <FIG>). In the sixth example, by setting the length L4 of the fourth slit <NUM> to be the same as or shorter than the width W1 of the article to be packaged P1 stored in the packaging bag <NUM> in the traverse direction (X direction), the width of the formed rectangular opening hole in the traverse direction (X direction) becomes less than or equal to the width W1 of the article to be packaged P stored in the packaging bag <NUM> in the traverse direction (X direction) (see <FIG> and <FIG>).

Note that an upper limit a ratio of the length L4 of the fourth slit <NUM> (hereinafter referred to as a ratio L4) in the case of setting the width W1 of the article to be packaged P (article to be packaged P1) in the traverse direction (X direction) to <NUM>% can be set to <NUM>% or less, and is preferably <NUM>% or less, and more preferably <NUM>% or less. In addition, a lower limit of the ratio L4 can be set to <NUM>% or more.

In addition, a position of the first slit <NUM> to which the fourth slit <NUM> is connected is not limited to the center part 40c, and can be appropriately changed depending on the size of the width W2 of the articles to be packaged P in the vertical direction (Z direction), the number of accommodated articles to be packaged P, etc. Therefore, for example, a distance between the second slit <NUM> and the fourth slit <NUM> may be different from a distance between the third slit <NUM> and the fourth slit <NUM>.

Here, a description will be given of the case in which the packaging bag <NUM> of the sixth example is applied to a packaging bag that stores toilet paper as the articles to be packaged P (packaging bag according to a modification of the sixth example) with reference to <FIG>. <FIG> is a diagram illustrating the packaging bag according to the modification of the sixth example, and <FIG> are diagrams illustrating the packaging bag according to the modification of the sixth example.

In the packaging bag <NUM> according to the modification of the sixth example, as the articles to be packaged P, a total of twelve pieces of roll-shaped toilet paper are accommodated in a state of being stacked in three stages, each of which has four pieces arranged thereon (see <FIG>). In addition, the dimensions of the articles to be packaged P (toilet paper) are not particularly limited. However, in the state of being stored in the packaging bag <NUM>, the height (roll width) in the vertical direction (Z direction) is preferably about <NUM> to <NUM>, and the width (roll diameter) in the traverse direction (X direction) is preferably about <NUM> to <NUM>.

In the modification of the sixth example, as illustrated in <FIG> and <FIG>, first, by breaking a part of the first slit <NUM> on the top surface part <NUM> side, the second slit <NUM>, and the fourth slit <NUM>, it is possible to form an opening hole OP1 having a length approximately half the height of the body <NUM> on the top surface part <NUM> side (see <FIG>). In this way, even when a plurality of articles to be packaged P (articles to be packaged P1 to P4) is stored in a plurality of stages (three stages), it is possible to prevent the remaining articles to be packaged (P12 to P14, etc.) from coming off from the opening hole after the article to be packaged P11 on the upmost stage is taken out.

In the modification of the sixth example, further, by breaking a remaining part of the first slit <NUM> on the bottom surface part <NUM> side and the third slit <NUM>, it is possible to further form an opening hole OP2 having a length approximately half the height of the body <NUM> on the bottom surface part <NUM> side. In this way, in the case of taking out the article to be packaged P1 (articles to be packaged P12 and P13) on a lower stage of the article to be packaged P1 (article to be packaged P11) on an uppermost stage, it is possible to reliably take out the article to be packaged P1 (articles to be packaged P12 and P13) on the lower stage by breaking the remaining part of the first slit <NUM> on the bottom surface part <NUM> side and the third slit <NUM>.

In addition, by breaking the part of the first slit <NUM> on the top surface part <NUM> side, the second slit <NUM>, and the fourth slit <NUM>, a broken piece FG1 is formed at the same time as the opening hole OP1 is formed on the lateral surface part 13a (see <FIG> and <FIG>). In the modification of the sixth example, as described above, the opening hole OP1 can be closed (or blocked) by covering the lateral surface part 13a (outer periphery of the body <NUM> of the packaging bag <NUM>) with the broken piece FG1. In this way, even after opening the packaging bag <NUM>, the remaining articles to be packaged P1 (P12 to P13), P2 (P21 to P23), P3 (P31 to P33), and P4 (P41 to P43) can be protected from dirt and dust.

In addition, by further breaking the part of the first slit <NUM> on the bottom surface part <NUM> side and the third slit <NUM>, a broken piece FG2 is formed at the same time as the opening hole OP2 is formed on the lateral surface part 13a (see <FIG>). In the modification of the sixth example, as described above, the opening hole OP2 can be closed (or blocked) by covering the lateral surface part 13a (outer periphery of the body <NUM> of the packaging bag <NUM>) with the broken piece FG2. In this way, even after opening the packaging bag <NUM>, the remaining articles to be packaged P2 (P21 to P23), P3 (P31 to P33), and P4 (P41 to P43) can be protected from dirt and dust.

Note that even though the adhesive portion <NUM> is not provided in the modification of the sixth example, the adhesive portion <NUM> may be provided in the packaging bag <NUM> according to the modification of the sixth example. In the modification of the sixth example, a position of the adhesive portion <NUM> is not particularly limited. However, as described above, the position is preferably set to a position at which the broken pieces FG1 and FG2 are attached to the outer periphery of the body <NUM> of the packaging bag <NUM> when the lateral surface part 13a (outer periphery of the body <NUM> of the packaging bag <NUM>) is covered with the broken pieces FG1 and FG2. In addition, in the modification of the sixth example, even though the number of the adhesive portions <NUM> is not particularly limited, it is preferable to provide two adhesive portions <NUM> corresponding to the broken pieces FG1 and FG2.

<FIG> is a diagram illustrating a packaging bag according to a seventh example which is not part of the invention. In a packaging bag <NUM> of the seventh example, as illustrated in <FIG>, the slash part S for opening provided on the lateral surface part 13a of the body <NUM> of the packaging bag <NUM> only includes the first slit <NUM> and the second slit <NUM> described above. That is, in the seventh example, the third slit <NUM> is not provided when compared to the first example of <FIG>, etc. According to such a configuration, in the seventh example, since the L-shaped slash part S is disposed at a conspicuous position on the lateral surface part 13a of the body <NUM> of the packaging bag <NUM>, it is easy to find a place to open the packaging bag <NUM> of the seventh example.

In addition, in the seventh example, when the packaging bag <NUM> is opened, after the first slit <NUM> is broken in the vertical direction (Z direction), the second slit <NUM> on the top surface part <NUM> side is further broken continuously with the first slit <NUM> in the traverse direction (X direction). In this way, a triangular opening hole OP can be formed on the lateral surface part 13a of the body <NUM> (see <FIG>). Therefore, the packaging bag <NUM> of the seventh example is excellent in the openability.

In addition, in the seventh embodiment, as described above, in the triangular opening hole OP formed on the lateral surface part 13a of the body <NUM>, the width of the opening hole OP in the traverse direction (X direction) gradually increases from the bottom surface part <NUM> side toward the top surface part <NUM> side (see <FIG>). For this reason, in the seventh example, it is easy to take out the articles to be packaged P stored in the packaging bag <NUM> from the opening hole OP. Therefore, the packaging bag <NUM> of the seventh example is excellent in the product take-out property.

In addition, in the seventh example, as described above, by forming the triangular opening hole OP on the lateral surface part 13a of the body <NUM>, the broken piece FG of the packaging bag <NUM> has a triangular shape corresponding to the shape of the opening hole OP (see <FIG>). For this reason, by covering the lateral surface part 13a of the body <NUM> of the packaging bag <NUM> (the outer periphery of the body <NUM> of the packaging bag <NUM>) with the triangular broken piece FG after taking out some (article to be packaged P1) of the articles to be packaged P, it is possible to close (or block) the opening hole OP. In this way, in the seventh example, even after opening the packaging bag <NUM>, the product can be protected from dirt and dust. Therefore, the packaging bag <NUM> of the seventh example is excellent in storability after opening.

Further, in the seventh example, as described above, in the triangular opening hole OP formed on the lateral surface part 13a of the body <NUM>, the width of the opening hole OP in the traverse direction (X direction) gradually decreases from the top surface part <NUM> side to the bottom surface part <NUM> side (see <FIG>). In this way, an area for pressing the articles to be packaged P (article to be packaged P1) of the parts 13e and 13f of the lateral surface part 13a adjacent to the opening hole OP formed after the packaging bag <NUM> is opened in the traverse direction (X direction) gradually increases from the top surface part <NUM> side to the bottom surface part <NUM> side. Therefore, the packaging bag <NUM> of the seventh example can prevent the articles to be packaged P from coming off from the opening hole OP after the packaging bag <NUM> is opened.

Hereinafter, the invention will be specifically described with reference to examples. Evaluation of the examples and comparative examples was performed by the following tests.

For Examples <NUM> to <NUM> and Comparative Examples <NUM> to <NUM>, as the articles to be packaged P, a packaging bag <NUM> storing four pieces of roll-shaped kitchen paper ("Elleair kitchen towel <NUM> cut" manufactured by Daio Paper Co. ) was prepared. Referring to the dimensions of the kitchen paper, in the state of being stored in the packaging bag <NUM>, a height (roll width) in the vertical direction (Z direction) is about <NUM>, and a width (roll diameter) in the traverse direction (X direction) is about <NUM>. Further, in Example <NUM>, as the articles to be packaged P, a packaging bag <NUM> storing twelve pieces of roll-shaped toilet paper ("Elleair toilet tissue <NUM> single (<NUM>/roll)" manufactured by Daio Paper Co. ) was prepared. Referring to the dimensions of the toilet paper, in the state of being stored in the packaging bag <NUM>, a height (roll width) in the vertical direction (Z direction) is about <NUM>, and a width (roll diameter) in the traverse direction (X direction) is about <NUM>. In addition, the packaging bag <NUM> was produced by folding a <NUM>-thick polyethylene (PE) film, which is formed in a tubular shape, into a gusset shape using a bag-making machine.

Durability when the user held the handle portion <NUM> by freely hanging the finger H on the finger hook <NUM> of the packaging bag <NUM> and moved the packaging bag <NUM> back and forth <NUM> times like a pendulum within a range of <NUM>° (a pendulum test was performed) was evaluated. The pendulum test was carried out <NUM> times for each of the examples and comparative examples, and evaluated according to the following criterion.

The ease of opening (openability) when the packaging bag <NUM> was opened was evaluated. The openability was evaluated according to the following criterion from an average value of results of tests conducted by five users and scored for each of the examples and the comparative examples. The Openability was evaluated excellent when the average value was <NUM> points or more.

The easiness of taking out (take-out property) when one roll of the articles to be packaged P in the packaging bag <NUM> was taken out after the packaging bag <NUM> was opened was evaluated. The take-out property was evaluated according to the following criterion from an average value of results of tests conducted by five users and scored for each of the examples and the comparative examples. The take-out property was evaluated excellent when the average value was <NUM> points or more.

After taking out one roll of the articles to be packaged P in the opened packaging bag <NUM>, the easiness of storage (storability) after opening was evaluated based on whether or not the remaining articles to be packaged P in the packaging bag <NUM> can be covered (or wrapped) with the broken piece FG (or FG1 and FG2) of the packaging bag <NUM>. The test was performed <NUM> times for each of the examples and comparative examples, and evaluation was performed according to the following criterion.

The packaging bag <NUM> of the first example illustrated in <FIG> and <FIG> was prepared. In this packaging bag <NUM>, the first slit <NUM> extending in the vertical direction (Z direction) from near the top surface part <NUM> to near the bottom surface part <NUM> was formed on the lateral surface part 13a of the body <NUM>. In addition, the second slit <NUM> extending in the traverse direction (X direction) was formed on the top surface part <NUM> side of the lateral surface part 13a continuously with the one end 40a of the first slit <NUM>. In addition, the third slit <NUM> extending in the traverse direction (X direction) was formed continuously with the other end 40b of the first slit <NUM> on the bottom surface part <NUM> side of the lateral surface part 13a to face the second slit <NUM> in the vertical direction (Z direction). In addition, the length L1 of the first slit <NUM> was set to about <NUM> (ratio L1: about <NUM>%), the length L2 of the second slit <NUM> was set to about <NUM> (ratio L2: <NUM>%), the length L3 of the third slit <NUM> was set to about <NUM> (ratio L3: about <NUM>%), the distance D1 between the second slit <NUM> and the top surface part <NUM> was set to about <NUM> (ratio D1: about <NUM>%), and the distance D2 between the third slit <NUM> and the bottom surface part <NUM> was set to about <NUM> (ratio D2: about <NUM>%). Further, the adhesive portion <NUM> was formed on the lateral surface part 13a on the opposite side from the second slit <NUM> with respect to the first slit <NUM>. For the packaging bag <NUM>, the durability, the openability, the take-out property, and the storability were evaluated. The results are shown in Table <NUM>.

The packaging bag <NUM> of the second example illustrated in <FIG> was prepared. In the packaging bag <NUM>, except that the length L1 of the first slit <NUM> was set to about <NUM> (ratio L1: about <NUM>%), the second slit <NUM> had a base portion <NUM> and a sloped portion <NUM> in which one end of the second slit <NUM> is inclined with respect to the base portion <NUM>, and the third slit <NUM> had a base portion <NUM> and a sloped portion <NUM> in which one end of the third slit <NUM> is inclined with respect to the base portion <NUM>, the packaging bag <NUM> was produced and evaluated similarly to Example <NUM>. The results are shown in Table <NUM>.

The packaging bag <NUM> of the embodiment illustrated in <FIG> was prepared. In the packaging bag <NUM>, except that the length L3 of the third slit <NUM> was set to be shorter than the length L2 of the second slit <NUM>, the length L2 of the second slit <NUM> was set to about <NUM> (ratio L2: <NUM>%), and the length L3 of the third slit <NUM> was set to about <NUM> (ratio L3: about <NUM>%), the packaging bag <NUM> was produced and evaluated similarly to Example <NUM>. The results are shown in Table <NUM>.

The packaging bag <NUM> of the fourth example illustrated in <FIG> was prepared. In the packaging bag <NUM>, except that in the vertical direction (Z direction), the distance D2 between the third slit <NUM> and the bottom surface part <NUM> was set to be longer than the distance D1 between the second slit <NUM> and the top surface part <NUM>, the distance D1 was set to about <NUM> (ratio D1: about <NUM>%), and the distance D2 was set to about <NUM> (ratio D2: about <NUM>%), the packaging bag <NUM> was produced and evaluated similarly to Example <NUM>. The results are shown in Table <NUM>.

The packaging bag <NUM> of the fifth example illustrated in <FIG> was prepared. In the packaging bag <NUM>, except that the curved portion <NUM> protruding to the opposite side from the second slit <NUM> with respect to the first slit <NUM> (region of the lateral surface part 13a in which the second slit <NUM> is not provided) was formed at the center part 40c of the first slit <NUM>, the packaging bag <NUM> was produced and evaluated similarly to Example <NUM>. The results are shown in Table <NUM>.

The packaging bag <NUM> according to the modification of the sixth example illustrated in <FIG> was prepared. In the packaging bag <NUM>, except that the fourth slit <NUM> which is continuous with the center part 40c of the first slit <NUM>, faces the second slit <NUM> in the vertical direction (Z direction), and extends in the traverse direction (X direction) was formed on the lateral surface part 13a of the body <NUM>, and the length L4 of the fourth slit <NUM> was set to about <NUM> (ratio L4: about <NUM>%), the packaging bag <NUM> was produced and evaluated similarly to Example <NUM>. The results are shown in Table <NUM>.

Except that a linear slit <NUM> for opening was formed in the vertical direction (Z direction) of the lateral surface part 13a as illustrated in <FIG> instead of the first slit <NUM>, the second slit <NUM>, and the third slit <NUM>, a packaging bag <NUM> was produced and evaluated similarly to Example <NUM>. The results are shown in Table <NUM>.

Except that a slit <NUM> is provided on the top surface part <NUM>, slits <NUM> and <NUM> are provided on the lateral surface part 13a, and a slit <NUM> is provided on one lateral surface part 14a of the second lateral surface parts <NUM> as a slit <NUM> for opening as illustrated in <FIG> instead of the first slit <NUM>, the second slit <NUM>, and the third slit <NUM>, a packaging bag <NUM> was produced and evaluated similarly to Example <NUM>. The results are shown in Table <NUM>.

Except that slits <NUM>, <NUM>, and <NUM> are provided on the lateral surface part 13a near the top surface part <NUM> as a slit <NUM> for opening as illustrated in <FIG> instead of the first slit <NUM>, the second slit <NUM>, and the third slit <NUM>, a packaging bag <NUM> was produced and evaluated similarly to Example <NUM>. The results are shown in Table <NUM>.

From Table <NUM>, in all the packaging bags <NUM> in which the first slit <NUM>, the second slit <NUM>, and the third slit <NUM> are provided on the lateral surface part 13a of the body <NUM>, the durability was excellent, the openability was <NUM> or more, the take-out property was <NUM> or more, and the storability was excellent (Examples <NUM> to <NUM>).

On the other hand, in the packaging bags <NUM> in which the first slit <NUM>, the second slit <NUM>, and the third slit <NUM> were not provided, even though the openability was <NUM> or more, the durability was poor, the take-out property was less than <NUM>, or the storability was poor in one of the packaging bags <NUM> (Comparative Examples <NUM> to <NUM>).

From these results, it was found that when the slash part provided on at least one of the plurality of lateral surface parts of the body has the first slit extending in the vertical direction from near the top surface part to near the bottom surface part, and the second slit extending in the traverse direction intersecting the vertical direction continuously with one end of the first slit on the top surface part side, it is possible to obtain the packaging bag excellent in the openability, the take-out property, and the storability.

Even though the embodiment of the invention and the examples have been described above, the invention is not limited to the specific embodiments, and various modifications and changes are possible within the scope of the invention described in the claims.

Hereinafter, preferred aspects of the invention will be additionally described.

A first aspect of the invention is a packaging bag including a body for storing a plurality of articles to be packaged, in which the body has a top surface part, a bottom surface part facing the top surface part in a vertical direction, and a plurality of lateral surface parts disposed between the top surface part and the bottom surface part, a slash part for opening is provided on at least one of the plurality of lateral surface parts, and the slash part includes a first slit extending in the vertical direction from near the top surface part to near the bottom surface part, and a second slit extending in a traverse direction intersecting the vertical direction continuously with one end of the first slit on a side of the top surface part.

In the first aspect, the slash part for opening provided on the lateral surface part of the body of the packaging bag includes the first slit extending over substantially the entire region of the lateral surface part of the body of the packaging bag in the vertical direction, and the second slit continuously extending in the traverse direction from one end of the first slit on the top surface part side. According to such a configuration, in the first aspect, the L-shaped or claw-shaped (hereinafter referred to as L-shaped) slash part is disposed at a conspicuous position on the lateral surface part of the body of the packaging bag, and thus it is easy to find a place to open the packaging bag.

In addition, in the first aspect, when the packaging bag is opened, the first slit is broken in the vertical direction with a small force, and the second slit on the top surface part side is further broken in the traverse direction continuously with the first slit. In this way, a triangular opening hole can be formed on the lateral surface part of the body. Therefore, according to the first aspect, it is possible to provide a packaging bag having excellent openability.

In addition, in the first aspect, since the length of the first slit is a length from near the top surface part to near the bottom surface part in the vertical direction, the length in the vertical direction (length of the broken first slit) becomes approximately the same as the height of the articles to be packaged in a state of being stored in the packaging bag. In addition, as described above, in the triangular opening hole formed on the lateral surface part of the body, the width of the opening hole in the traverse direction gradually widens from the bottom surface part side to the top surface part side. For this reason, in the first aspect, it is easy to take out the articles to be packaged stored in the packaging bag from the opening hole. Therefore, according to the first aspect, it is possible to provide the packaging bag excellent in the product take-out property.

In addition, in the first aspect, as described above, the triangular opening hole is formed on the lateral surface part of the body, so that a broken piece of the packaging bag (part of the lateral surface part of the body formed (or turned up) by breaking the slash part) has a triangular shape corresponding to the shape of the opening hole. For this reason, by covering the lateral surface part (outer periphery of the packaging bag) of the body of the packaging bag with the triangular broken piece after taking out some of the articles to be packaged, it is possible to close (or block) the opening hole. In this way, after opening the packaging bag, the product can be protected from dirt and dust (dirt, dust, mote, etc.). Therefore, according to the first aspect, it is possible to provide the packaging bag excellent in the storability after opening.

Further, in the first aspect which is not part of the invention, as described above, in the triangular opening hole formed on the lateral surface part of the body, the width of the opening hole in the traverse direction is gradually narrowed from the top surface part side toward the bottom surface part side. In this way, an area for pressing the articles to be packaged of the parts of the lateral surface part adjacent to the opening hole formed after the packaging bag is opened in the traverse direction gradually increases from the top surface part side to the bottom surface part side. Therefore, according to the first aspect, it is possible to prevent the articles to be packaged from coming off from the opening hole after the packaging bag is opened.

In addition, as in the first aspect, in the configuration in which the second slit continuous with one end of the first slit on the top surface part side extends in the traverse direction intersecting the vertical direction, one end of the second slit connected to the one end of the first slit on the top surface part side may be curved or inclined.

By adopting such a configuration, in the first aspect, when the packaging bag is opened, the force in the vertical direction for breaking the first slit is easily transmitted in the traverse direction in which the second slit is broken. For this reason, even when the second slit is formed on the top surface part side of the first slit, the packaging bag can be opened with a smaller force. Further, when the slash part breaks from the first slit to the second slit, it is possible to prevent the slash part from breaking in an unexpected direction.

A second aspect according to the invention is the packaging bag in which the first slit is formed along a boundary between at least two adjacent articles to be packaged among the plurality of articles to be packaged. In the second aspect, in the lateral surface part coming into contact with the two adjacent articles to be packaged in the state of being stored in the packaging bag, the first slit can be formed along the boundary between the two articles to be packaged. For this reason, when the packaging bag is opened, a finger is easily caught in the first slit, and the first slit is easily broken. In addition, an end portion of the broken piece formed when the first slit is broken becomes easy to grab, and the second slit is easily broken. Therefore, according to the second aspect, it is possible to provide the packaging bag more excellent in the openability.

A third aspect according to the invention is the packaging bag in which a length of the second slit is the same as or shorter than a width of one of the articles to be packaged in the traverse direction. In the third aspect, by setting the length of the second slit to be the same as or shorter than the width of the article to be packaged in the state of being stored in the packaging bag in the traverse direction, the width of the opening hole formed after opening the packaging bag on the top surface part side becomes less than or equal to the width of the article to be packaged in the state of being stored in the packaging bag in the traverse direction. In this way, while ensuring a region in the opening hole for taking out the articles to be packaged, it is possible to press the articles to be packaged by parts of the lateral surface part adjacent to the opening hole in the traverse direction. Therefore, according to the third aspect, it is possible to further prevent the articles to be packaged from coming off from the opening hole after the packaging bag is opened.

A fourth aspect according to the invention is the packaging bag in which the slash part further includes a third slit which is continuous with the other end of the first slit on a side of the bottom surface part, faces the second slit in the vertical direction, and extends in the traverse direction. In the fourth aspect, the slash part for opening provided on the lateral surface part of the body of the packaging bag includes the first slit and the second slit as described above, and further includes the third slit continuously extending in the traverse direction from the other end of the first slit on the bottom surface part side. According to such a configuration, in the fourth aspect, since a U-shaped slash part is disposed at a conspicuous position on the lateral surface part of the body of the packaging bag, it is easy to find a place to open the packaging bag.

In addition, in the fourth aspect, when the packaging bag is opened, as described above, the first slit is broken, and the second slit on the top surface part side and the third slit on the bottom surface part side are further broken continuously with the first slit in the traverse direction. In this way, a rectangular opening hole can be formed on the lateral surface part of the body. Therefore, according to the fourth aspect, it is possible to provide the packaging bag having excellent openability.

In addition, in the fourth aspect but not being part of the invention, since the length of the first slit is a length from near the top surface part to near the bottom surface part in the vertical direction, as described above, the length of the rectangular opening hole formed on the lateral surface part of the body in the vertical direction also becomes approximately the same as the height of the article to be packaged in the state of being stored in the packaging bag. For this reason, it is easy to take out the articles to be packaged stored in the packaging bag. Therefore, according to the fourth aspect, it is possible to provide the packaging bag having the excellent product take-out property.

In addition, in the fourth aspect but not being part of the invention, as described above, by forming the rectangular opening hole on the lateral surface part of the body, the broken piece of the packaging bag has a rectangular shape corresponding to the shape of the opening hole. For this reason, by covering the lateral surface part of the body of the packaging bag (the outer periphery of the packaging bag) with the rectangular broken piece after taking out some of the articles to be packaged, it is possible to close (or block) the opening hole. In this way, even after opening the packaging bag, the product can be protected from dirt and dust. Therefore, according to the fourth aspect, it is possible to provide the packaging bag excellent in the storability after opening.

Furthermore, in the fourth aspect, the length of the first slit is the length from near the top surface part to near the bottom surface part in the vertical direction as described above, and therefore the length of the first slit becomes shorter than the length of the articles to be packaged in the state of being stored in the packaging bag in the vertical direction. In this way, both end portions of the article to be packaged in the vertical direction can be pressed by parts of the lateral surface part adjacent to an upper end and a lower end of the opening hole formed after opening the packaging bag. Therefore, according to the fourth aspect, it is possible to prevent the article to be packaged from coming off from the opening hole after the packaging bag is opened.

In addition, as in the fourth aspect, in a configuration in which the third slit continuous with one end of the first slit on the bottom surface part side extends in the traverse direction intersecting the vertical direction, one end of the third slit connected to one end of the first slit on the top surface part side may be curved or inclined.

By adopting such a configuration for the third slit, in the fourth aspect, when the packaging bag is opened, the force in the vertical direction for breaking the first slit is easily transmitted in the traverse direction in which the third slit is broken. For this reason, even when the third slit is further formed on the bottom surface part side of the first slit, the packaging bag can be opened with a smaller force. Further, when the slash part breaks from the first slit to the third slit, it is possible to prevent the slash part from breaking in an unexpected direction.

A fifth aspect, which does not fall into the scope of claim <NUM>, is the packaging bag in which a length of the third slit is the same as or shorter than the width of the one of the articles to be packaged in the traverse direction. In the fifth aspect, by setting the length of each of the second slit and the third slit to be the same as or shorter than the width of the article to be packaged in the state of being stored in the packaging bag in the traverse direction, the width of the formed rectangular opening hole in the traverse direction becomes less than or equal to the width of the article to be packaged in the state of being stored in the packaging bag in the traverse direction. In this way, while ensuring a sufficient region in the opening hole for taking out the articles to be packaged, it is possible to press both end portions of the articles to be packaged in the vertical direction by parts of the lateral surface part adjacent to the upper end and the lower end of the rectangular opening hole formed after opening the packaging bag and parts of the lateral surface part adjacent to both end portions in the traverse direction. Therefore, according to the fifth aspect, it is possible to improve the take-out property of the articles to be packaged while preventing the articles to be packaged from coming off from the opening hole.

A sixth aspect of the invention is the packaging bag in which the length of the third slit is shorter than the length of the second slit. In the sixth aspect, by setting the length of the third slit provided on the bottom surface part side to be shorter than the length of the second slit provided on the top surface part side, the width of the opening hole in the traverse direction gradually decreases from the top surface part side to the bottom surface part side. In this way, a trapezoidal opening hole in which the bottom surface part side is an upper bottom and the top surface part side is a lower bottom can be formed on the lateral surface part of the body. In such a trapezoidal opening hole, while ensuring a sufficient region in the opening hole for taking out the articles to be packaged, both end portions of the articles to be packaged in the traverse direction can be pressed by parts of the lateral surface part adjacent to both end portions of the trapezoidal opening hole formed after opening the packaging bag in the traverse direction. Therefore, according to the sixth aspect, it is possible to further improve the take-out property of the articles to be packaged while preventing the articles to be packaged from coming off from the opening hole.

A seventh aspect according to the invention is the packaging bag in which a distance between the third slit and the bottom surface part in the vertical direction is longer than a distance between the second slit and the top surface part in the vertical direction. In the seventh aspect, by setting the distance between the third slit and the bottom surface part in the vertical direction to be longer than the distance between the second slit and the top surface part in the vertical direction, it is possible to form a wall portion for pressing the articles to be packaged in a part of the lateral surface part adjacent to an end portion of the opening hole on the bottom surface part side. In this way, it is possible to further prevent the articles to be packaged from coming off from the opening hole formed when the packaging bag is opened.

An eighth aspect according to the invention is the packaging bag in which a curved portion protruding to an opposite side from the second slit with respect to the first slit is formed at a center part of the first slit. In the eighth aspect, by providing such a curve portion at the center part of the first slit, the finger is easily caught in the center part of the first slit, and the first slit can be easily broken. In addition, when a broken piece is formed at the center part of the first slit to correspond to the curved portion after the first slit is broken, and a part of the broken piece corresponding to the curved portion is grabbed, it is possible to easily break the second slit and/or the third slit. Therefore, according to the eighth aspect, it is possible to further improve the openability of the packaging bag.

A ninth aspect according to the invention is the packaging bag in which the slash part further includes a fourth slit which is continuous with a center part of the first slit, faces the second slit in the vertical direction, and extends in the traverse direction. In the ninth aspect, in the slash part for opening provided in the lateral surface part of the body of the packaging bag, further, the fourth slit continuous with the center part of the first slit extends in the traverse direction by facing the second slit in the vertical direction.

In the ninth aspect, by further breaking a part of the first slit on the top surface part side, the second slit, and the fourth slit, it is possible to form an opening hole having a length that is half a height of the body on the top surface part side. In this way, even when the articles to be packaged are stored in a plurality of stages (for example, three stages) like toilet rolls, etc., it is possible to prevent the remaining articles to be packaged from coming off from the opening hole after the article to be packaged on the upmost stage is taken out.

Further, in the ninth aspect, by breaking the remaining part of the first slit on the bottom surface part and the third slit, an opening hole having a length that is approximately half the height of the body can be further formed on the bottom surface part side. In this way, in the case of taking out the article to be packaged on a lower stage of the article to be packaged on an uppermost stage, it is possible to reliably take out the article to be packaged on the lower stage by breaking the remaining part of the first slit on the bottom surface part side and the third slit.

Claim 1:
A packaging bag (<NUM>) comprising
a body (<NUM>) for storing a plurality of articles (P) to be packaged,
wherein the body (<NUM>) has a top surface part (<NUM>), a bottom surface part (<NUM>) facing the top surface part in a vertical direction (Z), and a plurality of lateral surface parts (<NUM>, 13a, 13b) disposed between the top surface part and the bottom surface part,
a slash part (S) for opening is provided on at least one of the plurality of lateral surface parts(<NUM>, 13a, 13b), and
the slash part (S) includes
a first slit (<NUM>) extending in the vertical direction (Z) from a point of the lateral surface adjacent to the top surface part to another point of the lateral surface adjacent to the bottom surface part, and
a second slit (<NUM>) extending continuously with one end of the first slit (<NUM>) on a side of the top surface part (<NUM>), in a travers direction (X) perpendicular to the vertical direction,
a third slit (<NUM>) which is continuous with the other end of the first slit on a side of the bottom surface part, faces the second slit (<NUM>) in the vertical direction, and extends in the traverse direction,
characterized in that the length (L3) of the third slit (<NUM>) is shorter than the length (L2) of the second slit (<NUM>) and in that an adhesive portion (<NUM>) is provided on the lateral surface part (<NUM>, 13a, 13b) on an opposite side from the second slit (<NUM>) with respect to the first slit (<NUM>).