JP4360853B2 - Packaging bag - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a packaging bag. More specifically, the present invention contains, for example, various liquids such as detergents, shampoos, rinses, body shampoos, juices, etc. as contents, and opens the closed tip of the bent-out pouring passage from the pouring passage. The present invention relates to a packaging bag that can be used as it is without being refilled into a container such as a bottle by pouring out the contents.
[0002]
[Prior art]
A packaging bag with a bent-out dispensing passage opens the closed end of the dispensing passage, and when pressure is applied to the contents contained in the bag, the contents flow out of the opening, and the pressure on the contents is reduced. When it is lowered, the outflow of the contents stops, and when the contents remaining in the pouring passage are squeezed out, the contents will not flow out unless pressure is applied to the contents even if the bag is placed sideways. In addition, it has an excellent convenience that it can be used as it is without being refilled into a container such as a bottle, and a flat bag or a standing pouch is known.
[0003]
By the way, in such a flat bag or a standing pouch, if the contents of the bag filled and contained in the bag are gripped and pressure is applied to the contents to cause the contents to flow out from the opening of the pouring passage, In the vicinity of the base end portion of the passage, the main body portion swells greatly, and in the vicinity of the base end portion of the pouring passage, the bag bends in either the front or rear direction, and the pouring passage is easily blocked, and the contents start to flow out. Requires a lot of power. And the outflow of the content from the extraction passage suddenly occurs, the outflow direction is also unstable and difficult to predict, and it is difficult to handle. In addition, considerable power is required to keep the contents flowing out from the pouring passage.
[0004]
Various technologies have been developed to solve this problem, but they are still not satisfactory.
For example, the one described in Patent Document 1 is such that the side seal of the main body is welded in a convex shape such as a semicircle, a square, or a triangle toward the inside at a position away from the extraction passage. This is because the body part is greatly swollen in the vicinity of the base end part of the pouring passage when the bag is gripped and pressure is applied to the contents to make it flow out of the pouring passage. Although it is intended to make it difficult for the bag to bend in the front or back direction in the vicinity of the part, it is difficult to say that the bag is satisfactory. In addition, stress concentration due to pressure is likely to occur in the welded portion, which tends to cause broken bags.
[0005]
The thing of patent document 2 forms the buckling prevention structure in the sealing surface which formed the extraction channel | path. As the buckling prevention structure, a structure in which a hard film or a hard sheet is joined to the seal surface, a structure in which the seal surface is formed wide and reinforced are disclosed. However, even with this, it is difficult to sufficiently prevent the bag from being folded in any of the front and rear directions so as to close the vicinity of the proximal end portion of the dispensing passage, and the usability is not good. In particular, when the content is reduced, the buckling prevention structure prevents the flow of the content or induces wrinkles or the like that prevent the movement of the content in the vicinity of the base end portion of the dispensing passage.
[0006]
The thing of patent document 3 provides the neck point around the base part of the extraction channel | path. Also by this, it is difficult to sufficiently prevent the bag from being folded in either the front or rear direction so as to close the vicinity of the base end portion of the dispensing passage, and the usability is not good. In particular, when the content is reduced, the neck point prevents the flow of the content, or induces wrinkles or the like that prevent the movement of the content in the vicinity of the base end portion of the dispensing passage.
[0007]
The one described in Patent Document 4 forms a bulging portion that extends from the vicinity of the proximal end portion of the bent-out pouring passage to the intermediate portion thereof, and starts from the vicinity of the proximal end of the bulging portion. A concave groove for deforming a letter-shaped or V-shaped sheet is formed in the main body sheet. This is because when the contents are poured out from the main body portion through the pouring passage, the concave groove is deformed to dent inside the sheet, and either before or after the bag that closes the vicinity of the base end portion of the pouring passage. Bending in the direction is prevented and the content is poured out through the bulging portion, but depending on how the main body is gripped, the dispensing of the content may be easily affected. In addition, prior to the manufacture of the bag, it is necessary to preform the groove and the bulging portion on the sheet, leading to an increase in cost.
[0008]
In Patent Document 5, a partition film made of a gusset sheet is provided on the upper portion of a main body of a bag such as a standing pouch, and a small partition space is formed above the partition film. According to this, it is possible to prevent the folding in the front or rear direction of the bag that closes the vicinity of the base end portion of the pouring passage to a considerable extent, but it has reached the point of completely preventing the folding. Not in. Further, when the contents are reduced, the partition film becomes an obstacle, which causes troubles in the dispensing of the contents or remains as a residual liquid in the bag. Further, when filling the contents in the bag, the partition film becomes an obstacle, and the filling tends to be hindered.
[0009]
[Patent Document 1]
JP-T-3-505322 (Claim 1, FIG. 2)
[Patent Document 2]
JP-A-6-329163 (Claims, FIGS. 5, 6, and 10)
[Patent Document 3]
Japanese Patent Laid-Open No. 7-41016 (Claim, FIG. 8)
[Patent Document 4]
JP 2002-160744 A (claim, FIG. 4)
[Patent Document 5]
JP2003-104400A (FIGS. 5 and 6)
[0010]
[Problems to be solved by the invention]
  The present invention was devised as a result of intensive research in view of the above situation, and in use, a necessary amount of contents can be removed from the opened dispensing passage., Body partGrasp lightly and easily, reliably and stably with a small force. When not in use, the contents will not flow out of the dispensing passage even if the bag is placed sideways unless pressure is applied to the contents.Bent shapeAn object of the present invention is to provide a packaging bag provided with a dispensing passage.
[0011]
[Means for Solving the Problems]
  To solve the above problem,thisThe packaging bag of the invention is such that the front sheet and the rear sheet face each other, and the gusset sheet folded inside between the front sheet and the rear sheet is sandwiched from the left and right with the folds facing each other, and is heat-sealed. A bag having a side gusset in which an extraction passage is formed in an upper portion of the content storage portion, and the extraction passage opens the closed tip and applies pressure to the content stored in the content storage portion. When added, the content flows out from the opening, and when the pressure is lowered, the flow of the content stops.When the content remaining in the extraction passage is squeezed out, the content flows out even if the bag is placed sideways unless pressure is applied. The upper part of the content container is formed so as to be narrowed upward by the left and right shoulder seals and communicates with the base end of the pouring passage, Left and right at the top of Ri-away, the spout portion protruding upward from the main body portion is formed, the left and right shoulder sealPartThere is a spread prevention means to prevent the spread of the gussetYes.
[0012]
According to this, only the relatively low pressure is applied to the contents accommodated in the contents accommodating portion by unsealing the closed tip of the dispensing passage, lightly grasping the main body, and the vicinity of the proximal end of the dispensing passage. The amount of the necessary amount can be reduced with a small force from the opening, regardless of the number of contents stored in the contents storage section, without causing any blockage of the extraction passage due to bending of the bag in either of the front and rear directions. The contents can be discharged easily, reliably and stably. This packaging bag is markedly superior to the bags described in Patent Documents 1 to 5 in dispensing contents. Since this packaging bag has a side gusset, it is suitable for storing a large amount of contents, and after the contents are filled and accommodated in the contents accommodating portion and sealed, the bottom is flattened. Therefore, the self-supporting property is good when the pouring part is set upward. Therefore, it is easy to store, transport, distribute, handle, etc. the bag with the contents contained therein, and even if the contents decrease after opening, with the pouring part standing upwards It can be used and is very convenient.
[0013]
In this way, the necessary amount of contents can be easily obtained with a small force from the opening without causing the blocking of the pouring passage due to the folding of the bag in either of the front and rear directions in the vicinity of the base end portion of the pouring passage. Each component of the present invention can be surely and stably flowed out, that is, the shape and structure of the bent-shaped dispensing passage formed in the bag and the content container, and the upper left and right are cut off. The shape and structure of a side gusset bag with a pour-out part protruding upward from the main body part and left and right shoulder seal parts, and the spread prevention means for preventing the spread of the gusset provided on the shoulder seal part are organic to each other It is thought that this is due to the action. In particular, the present inventors have provided that the expansion preventing means prevents the bag from bending in the front or rear direction in the vicinity of the base end portion of the pouring passage when the contents are poured out, and the base end portion of the pouring passage An experimental result has been obtained that it has a great function to make blockage in the vicinity difficult to occur, and that a good result can be obtained by interacting with other constituent elements.
In addition, it is preferable that the left and right shoulder seal portions are provided with an expansion preventing means for preventing the expansion of the gusset.
[0014]
  AboveThe location where the shoulder seal part of the spread prevention means is formed is a hindrance to the dispensing of the contents from the dispensing passage (when the contents are poured out, the packaging bag is placed either in the vicinity of the proximal end of the dispensing passage. It is not particularly limited as long as it does not bend in any direction.) The size and shape of the pouring passage, the size and shape of the shoulder seal part, and the size of the notch on the left and right of the top of the bag -Although it determines suitably considering a shape etc., it is preferable that the said expansion prevention means is provided in the substantially same height position as the base end part of the said extraction channel | path.
[0015]
  put it here,AboveMore preferably, the spread preventing means is formed of a welded portion in which the front sheet and the rear sheet are welded at the position of the notch or hole provided in the gusset sheet. According to this, there exists an advantage which can also form an expansion prevention means simultaneously by the heat seal at the time of bag making.
[0016]
  And in this packaging bag, the dispensing partOn one sideGusset sheetHaveIf you do, you can choose whether to have both left and right, and determine appropriately according to the content capacity, the necessity of reinforcing the extraction part with a gusset sheet, the extraction characteristics required based on the viscosity of the contents, etc. Is done. If the folding depth of the gusset sheet is increased, it is possible to reduce the lateral width of the main body to accommodate the same amount of contents. Therefore, the cross-sectional shape of the main body containing the contents is It becomes close to a square and the bag becomes more self-supporting, but when the gusset sheet is folded into the tip passage part of the pouring passage, for example, pressure is applied to the contents with the bag sideways. Even if it is not, there is a possibility that the content will naturally flow out from the opening of the leading end passage portion, and therefore, it is determined in such a range that does not become such a case. Hereinafter, a more specific example will be described.
[0017]
  That is,(A)The pouring part is formed by being cut out at a position outside the one fold line of the left and right gusset sheets and cut out at a position inside the fold line of the other gusset sheet. The gusset sheet from the one side only reaches the end passage part,(B)The pouring portion is formed by being cut out at a position outside the folds of both the left and right gusset sheets, and the gusset sheet from one side only reaches the base end passage portion of the pouring passage, The gusset sheet from the other side may not reach the extraction passage.
[0018]
  (A)In this case, when the contents are poured out, the contents are easily introduced into the base end passage portion because the gusset sheet has reached the base end passage portion of the pouring passage, and the one gusset sheet is poured. The directional stability and the like are improved when the contents are poured out by reinforcing the protruding portion. The reaching depth of the gusset sheet that has reached the proximal end passage portion of the dispensing passage is slightly deeper when the content has a high viscosity, but half the width of the proximal passage portion is reduced. It is preferable not to exceed.(B)In the above(A)Although it is substantially the same, the extraction | pouring part is reinforced with the right and left gusset sheet | seat, and the direction stability at the time of the extraction | pouring of the content becomes more favorable.
[0019]
As for the shape of the dispensing passage, when the closed tip is opened and pressure is applied to the contents stored in the contents container, the contents flow out of the opening, and when the pressure on the contents is reduced, the contents flow out. If the bent shape does not flow out unless the pressure is applied to the contents even if the bag is laid down when the contents remaining in the dispensing passage are squeezed out, the packaging is not limited. Although it is appropriately determined according to the usage method of the bag, the pouring characteristics required based on the viscosity of the contents, etc., the S-shaped or its deformed shape is generally used.
[0020]
  AboveIt is preferable that the left and right shoulder seal portions have an inclined shape on the content accommodating portion side. According to this, when the contents are poured out, the contents can be easily introduced into the dispensing passage. Moreover, there is little residue of the content in the upper part of a content accommodating part, and a content can be poured out almost completely.
[0021]
  (C)It is preferable that the upper part of the content container is a small chamber having a width exceeding the base end width of the extraction passage, and the small chamber communicates with the base end of the extraction passage. When the contents are to be poured out, the contents are buffered and stored in the small chamber space, and then the contents are smoothly moved to the base end of the pouring passage which becomes a narrower space. Things are better dispensed. Above all,(D)It is more preferable that at least one of the left and right gusset sheets reaches the small chamber. It is desirable that both the left and right gusset sheets reach the small chamber. Said(C), The shape and size of the chamber, where the chamber isWhenWhether to communicate is appropriately determined depending on the shape of the bag, the shape of the shoulder seal portion, the shape of the extraction passage, the type of contents, and the like. Said(D), The shape and size of the small chamber, the depth of the gusset sheet reaching the small chamber, and the base end of the dispensing passage at the small chamberWhenWhether to communicate(C)Similarly to the above, it is appropriately determined depending on the shape of the bag, the shape of the shoulder seal portion, the shape of the extraction passage, the type of contents, and the like.
[0022]
  AboveIt is preferable that at least one of the side edges of the main body is heat sealed. The heat-sealed side edge functions as a kind of support column, the main body is reinforced, and the independence of the bag is improved. In particular, it is preferable that the four side edges are heat sealed.
  When the number of side edges to be heat sealed is one to three, the remaining side edges may be formed by creases.
  AboveWhen the side edge of the main body is formed by a fold of the cylindrical sheet, it is easy to grip the content when the main body is gripped and the content is poured out, and the content can be easily pressurized.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments will be shown and the present invention will be described in more detail. Of course, the present invention is not limited to the following embodiments.
As the sheet used in the present invention, a film that can be heat-sealed into a bag, that is, a laminated film having a thermoplastic synthetic resin layer that can be heat-sealed on the inner layer side can be generally used. It may be a single layer film that can be heat sealed.
[0024]
The heat-sealable thermoplastic synthetic resin used for the innermost layer of the laminated film or the single-layer film includes low-density polyethylene, linear low-density ethylene-α-olefin copolymer, linear ultra-low-density polyethylene α-Olefin copolymer, ethylene-vinyl acetate copolymer, polypropylene, ionomer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-methyl methacrylate copolymer, ethylene-based polymerized by metatheron catalyst Although a polymer etc. can be employ | adopted, it is not restricted to these. As the intermediate layer and outer layer in the laminated film, various materials having a melting point higher than that of the thermoplastic synthetic resin used for the innermost layer can be used, and biaxially oriented polypropylene, propylene-based polymer, biaxially oriented polyamide, biaxial Examples include, but are not limited to, stretched polyester, nonwoven fabric, paper, cellophane, and aluminum foil. The thermoplastic synthetic resin used for the outer layer may be unstretched. In order to improve the gas barrier property of the laminated film, for example, a gas barrier film deposited with silicon oxide, aluminum oxide, or the like may be employed. An added film, a film coated with an ultraviolet ray inhibitor, or a film to which various additives are added according to the purpose can be used.
Aluminum foil is used to obtain gas barrier properties, light shielding properties, etc., but is generally used as an intermediate layer.
[0025]
FIG. 1 is a front view showing an embodiment of the packaging bag of the present invention, and FIG. 2 is an exploded view.
Hereinafter, for convenience of explanation, the packaging bag 1 will be described on the assumption that a multilayer film having a heat-sealable thermoplastic synthetic resin layer is used as a sheet.
[0026]
The packaging bag 1 has a substantially rectangular front sheet 2 and a rear sheet 3 facing each other, and gusset sheets 4 and 5 folded inwardly between the front sheet 2 and the rear sheet 3 facing the folds. Each of which is sandwiched and heat-sealed, and has a side gusset in which a pouring passage 7 is formed in the upper portion of the content containing portion 6 for containing the contents, and the content containing portion 6 and the pouring passage 7 are The outer boundary of the fusion boundary line 8 is heat-sealed to the edge along the fusion boundary line 8 (two-dot chain line in FIG. 2). The heat sealing is performed in a state in which the heat-sealable thermoplastic synthetic resin layers of the front sheet 2, the rear sheet 3, and the left and right gusset sheets 4, 5 face each other and are located on the inner layer side of the bag. An upper portion of the packaging bag is formed with a pour-out portion 13 which is cut out in a predetermined shape (rectangular shape in the packaging bag 1 of FIG. 1) and protrudes upward from the main body portion 12.
[0027]
The dispensing passage 7 opens the closed tip and applies pressure to the contents accommodated in the contents accommodating portion 6, the contents flow out from the opening, and when the pressure is lowered, the outflow of contents stops, When the contents remaining in the passage 7 are squeezed out, the contents are formed into a bent shape so that the contents do not flow out unless pressure is applied even when the bag is placed sideways. The seal portion 11 is formed so that the interval is narrowed upward and communicates with the base end portion of the extraction passage 7.
[0028]
Since the packaging bag 1 has side gussets, the front left shoulder seal part 10 in which the front side of the front sheet 2 and the left gusset sheet 4 is heat-sealed, and the rear side of the rear sheet 3 and the left gusset sheet 4 are heat-sealed. The rear left shoulder seal portion 10 is provided. Similarly, the front right shoulder seal portion 11 in which the front sides of the front seat 2 and the right gusset seat 5 are heat sealed, and the rear side of the rear seat 3 and the right gusset seat 5 are A heat-sealed rear right shoulder seal portion 11 is provided. And the front left shoulder seal part 10 and the back left shoulder seal part 10, the front right shoulder seal part 11 and the back right shoulder seal part 11 are in semicircular arc-shaped notches 4b and 5b provided in the left and right gusset sheets 4 and 5, The front sheet 2 and the rear sheet 3 are welded together. The welded portions 9 and 9 between the front sheet 2 and the rear sheet 3 in the notches 4b and 5b function as an expansion preventing means for preventing the expansion of the gusset when the contents are poured out. In FIG. 1, the welded portions 9 are provided at substantially the same height as the base end portion of the extraction passage 7. The location where the expansion preventing means is formed is not particularly limited as long as it does not interfere with the dispensing of the contents from the dispensing passage. The size and shape of the dispensing passage, the size of the shoulder seal portion, It is determined appropriately in consideration of the shape, the size and shape of the notch on the left and right of the upper part of the bag, but the height position should be approximately the same as the base end of the dispensing passage Is preferred. It should be noted that the spread prevention means may have different height positions and left and right positions in the left and right shoulder seal portions instead of symmetrical positions.
[0029]
The side edges of the main body 12 are four welding side edges 14, 14, 14, 14 in which the side edges of the front sheet 2, the rear sheet 3, and the gusset sheets 4, 5 are heat-sealed. The welding side edge portions 14, 14, 14, and 14 serve to reinforce the main body portion 12, and improve the self-supporting property of the bag.
The lower portion of the main body portion 12 of the packaging bag 1 is not heat-sealed, but serves as a filling port 15 for contents, and the bag is turned upside down from the filling port 15 to the inside of the fusion boundary line 8 of the main body portion 12. After the contents are filled into the contents container 6 formed in the above, the contents are sealed in the bag by heat-sealing the filling port 15. And this packaging bag 1 containing the contents can be made to stand on its own because a flat bottom can be formed by folding the lower part back and forth.
[0030]
Furthermore, it demonstrates more concretely.
The dispensing passage 7 in the packaging bag 1 includes a proximal end passage portion 7a, a distal end passage portion 7b, and an intermediate passage portion 7c that couples the two, and the proximal end passage portion 7a faces substantially upward, and the distal end passage portion 7b. Has an S-shape substantially parallel to the proximal end passage portion 7a.
Moreover, in the upper part of the main-body part 12, the inner side of the right and left shoulder seal parts 10 and 11 has the inclination linear shape part which mutually faced.
[0031]
In the packaging bag 1, the left and right gusset sheets 4 and 5 are sandwiched from the left and right between the front sheet 2 and the rear sheet 3 and heat-sealed, and the upper left and right sides are substantially rectangular and outside the fold. The left and right gusset sheets 4 and 5 are both inserted into the extraction portion 13. The fold of the left gusset sheet 4 does not reach the distal end passage portion 7 b of the extraction passage 7, but the fold of the right gusset sheet 5 reaches the proximal end passage portion 7 a of the extraction passage 7. Thus, since the gusset sheet has reached the proximal end passage portion 7a of the dispensing passage 7, when the contents are poured out, the contents are easily introduced into the proximal end passage portion 7a. Since both the gusset sheets 4 and 5 are sandwiched between the extraction portion 13, the extraction portion 13 is reinforced, and the directional stability and the like when the contents are extracted are improved.
In addition, although not shown in the extraction part 13, it is based on a V-notch for opening the closing tip of the extraction passage, an opening auxiliary printing line indicating the opening position and direction by scissors, half-cut processing, scratches, etc. Appropriate opening assistance means such as an easy opening weak line is applied.
[0032]
The packaging bag 1 can be manufactured, for example, as shown in FIG. That is, as shown in FIG. 3A, the long gusset sheets 18 and 19 are sandwiched between the long front sheet 16 and the rear sheet 17 from the left and right, and supplied to the heat seal part. In the seal part, heat sealing having the shape shown in FIG. 3B is performed, and then, in the punching part, the shape shown in FIG. 3C is punched to produce the packaging bag 1 shown in FIG. . In FIG. 3 (a), the left and right elongate casette sheets 18 and 19 are divided into a front side and a rear side, that is, a side facing the front sheet and a side facing the rear sheet, with the fold as a boundary. Holes 18a and 19a are formed at the same positions on the front and rear sides of the gusset sheet, respectively. The holes 18a and 19a are formed at predetermined pitches in the longitudinal direction. As shown in FIG. 3B, the holes 18a and 19a are heat seal parts, and the front sheet 16 and the rear sheet 17 are formed at the holes 18a and 19a. Welded. Then, the punched part is punched as shown in FIG. 3C, and the welded portion between the front sheet 16 and the rear sheet 17 in the holes 18a and 19a expands the gusset when the contents are poured out. It will function as a spread prevention means to prevent.
When a packaging bag is manufactured using a heat-sealable thermoplastic synthetic resin single-layer film, release paper or the like may be interposed between the folded gusset sheets.
[0033]
Of course, this packaging bag can be manufactured by cutting off the upper left and right sides of the bag after heat sealing it into a bag using a substantially rectangular front sheet, rear sheet, and left and right gusset sheets. .
[0034]
FIG. 4 shows a product which is filled with contents such as shampoo and detergent from the filling port 15 of the packaging bag 1 shown in FIG. 1 and is sealed by heat sealing. In FIG. 4, the lower part of the packaging bag 1 containing the contents is shown as the bottom, and the pouring part 13 is directed upwards. Then, in such a self-supporting state, it is stored in a storage box or the like, shipped, and distributed in the market.
[0035]
When the contents are poured out, an unsealing assisting means (not shown) is used to open the closing tip of the dispensing passage 7, for example, by gently grasping the main body 12 and applying a relatively low pressure to the contents. Just by adding, the contents move in the pouring passage without causing the occlusion of the pouring passage 7 due to bending in the front or rear direction of the bag in the vicinity of the base end portion of the pouring passage 7, etc. A necessary amount of contents can be easily and reliably discharged from the opening stably. FIG. 5 shows a state in which contents are discharged from the packaging bag 1. Thus, it is a side gusset bag that can easily, reliably, and stably pour out the contents from the pour passage 7 without blocking the pour passage 7 or the like. The upper left and right sides of the bag are notched into a predetermined shape (rectangular shape in FIG. 5) and have a pouring part protruding upward from the main body part, a shoulder seal part, an expansion preventing means (that is, a shoulder seal) That the front and rear sheets are welded in the part), that the pouring part is reinforced by the left and right gusset sheets, and that the gusset sheet reaches the base end passage part, etc. It is thought to be due to this.
[0036]
When the required amount of content has been dispensed, the content dispensing is stopped when the gripping force is weakened. When the contents remaining in the extraction passage 7 are squeezed out, even if the bag is laid down, there is no risk that the contents will leak out of the extraction passage unless pressure is applied to the contents in the bag.
In such a state, once the bag body 12 is gripped and pressure is applied to the contents as shown in FIG. 5, the contents are poured out from the dispensing passage 7 in the same manner as described above. Can do.
Similarly, if the contents are stopped from the extraction passage 7 and the contents from the extraction passage 7 are squeezed out, the contents can be repeatedly extracted, stopped and squeezed until the contents disappear.
[0037]
FIG. 6 is a plan view showing a packaging bag according to another embodiment of the present invention.
As shown in FIG. 6, the packaging bag 21 is different from the packaging bag 1 shown in FIG. 1 in that the seal shapes of the left and right shoulder seal portions 22 and 23 are different. The sealing shape of the shoulder seal portions 22 and 23 in the packaging bag 21 is heat-sealed in two steps on the substantially left side and heat-sealed in one step on the right. The left shoulder seal portion 22 and the right shoulder seal portion 23 are formed so that the left and right intervals are gradually reduced upward. By this heat sealing, a rectangular space when viewed from the front is formed in the upper portion of the content container 24 to form a space portion of an intermediate size that is wider than the width of the base end portion that extends to the left and communicates with the base end portion of the extraction passage 26. A small chamber 27 is formed. The left and right gusset sheets 28 and 29 reach the small chamber 27. By forming such a small chamber 27, when the contents are poured out, buffer storage is performed in the small chamber 27, and then the contents are placed at the base end portion of the pouring passage 26 which becomes a narrow space. It moves smoothly and leads to better content extraction. In the packaging bag 21 of FIG. 6, since the folds 28a and 29a of the left and right gusset sheets 28 and 29 reach the small chamber 27, the separation between the front sheet 30 and the rear sheet 31 in the small chamber 27 is also possible. It is easy and has a structure suitable for dispensing the contents.
The rest is the same as the packaging bag shown in FIG.
[0038]
FIG. 7 is a plan view showing a packaging bag according to still another embodiment of the present invention.
As shown in FIG. 7, in the packaging bag 41, the side edge of the main body portion 42 is not welded, and a cylindrical sheet is folded at a fold, and a front sheet 43a, a rear sheet 43b, left and right gusset sheets 43c, 1 is different from the packaging bag 1 shown in FIG. 1 in that the front sheet 43a, the rear sheet 43b, and the left and right gusset sheets 43c and 43d are connected by folds.
[0039]
The packaging bag 41 is formed, for example, by folding the left and right sides of a long cylindrical film 45 inward to form a gusset, and as shown in FIG. 8A, the front sheet 45a, the rear sheet 45b, and the left and right gussets. The sheets 45c and 45d are supplied to the heat seal part as being overlapped, and the heat seal part is subjected to the heat seal of the shape shown in FIG. 8 (b), and then in the punching part, FIG. 8 (c). The packaging bag 41 shown in FIG. 7 is manufactured by punching into the shape shown.
[0040]
Since this packaging bag 41 does not have a welded side edge at the side edge of the main body as in the packaging bag 1 shown in FIG. 1, less heat energy is required for heat sealing during production. There is an advantage that the hand does not hurt even if the bag is grasped when the object is poured out because there is no weld side edge. In order to ensure the self-supporting property of the packaging bag 41, a film having a waist may be used.
The rest is the same as the packaging bag shown in FIG.
[0041]
The packaging bag according to the present invention is not limited to the one having the structure described above, and can be variously changed according to the use of the packaging bag, the material of the film, the kind of contents to be accommodated, the accommodation amount, and the like.
The packaging bag 51 shown in FIG. 9 is cut out in a rectangular shape on the upper left side inside the fold line of the left gusset sheet when the left and right gusset sheets are sandwiched between the front sheet and the rear sheet from the left and right. 1, that is, the point that the gusset sheet is not sandwiched on the left side of the pouring part 52 is different from the packaging bag 1 of FIG. 1.
[0042]
  The packaging bag 61 shown in FIG., One reference example,In a state where the left and right gusset sheets are sandwiched between the front sheet and the rear sheet from the left and right, the upper left and right sides are cut out in a rectangular shape outside the folds of the left and right gusset sheets, Although the gusset sheet is sandwiched between the left and right sides, the right gusset sheet is different from the packaging bag 1 shown in FIG. 1 in that the right gusset sheet does not reach the proximal end passage portion of the dispensing passage.
[0043]
  The packaging bag 71 shown in FIG.Another reference example,When the left and right gusset sheets are sandwiched between the front and rear sheets from the left and right, the upper left side is cut out in a rectangular shape inside the fold line of the left gusset sheet, and the right side is outside the fold line of the right gusset sheet. Although the right gusset sheet is sandwiched on the right side of the pouring portion 72, the gusset sheet does not reach the base end passage portion of the pouring passage.
[0044]
  The packaging bag 81 shown in FIG.Yet another reference example,In the state where the left and right gusset sheets are sandwiched between the front sheet and the rear sheet from the left and right, the upper left and right sides are cut out in a rectangular shape inside the folds of the left and right gusset sheets, The sheet is not sandwiched.
[0045]
  The packaging bag 91 shown in FIG. 13 is different from the packaging bag 51 shown in FIG. 9 in the shape of the dispensing passage.
  The packaging bag 101 shown in FIG. 14 is also different from the packaging bag 51 shown in FIG. 9 in that the shape of the extraction passage is different and the extraction passage is directed to the left oblique direction.
  The packaging bag 111 shown in FIG.Yet another reference example,11 differs from the packaging bag 71 shown in FIG. 11 in that the shape of the pouring passage is different and the pouring passage is directed diagonally to the left.
[0046]
The packaging bag 121 shown in FIG. 16 is different from the packaging bag 1 shown in FIG. 1 in that the inner unsealed part side of the left and right shoulder seal parts 122 and 123 has a concave arc shape.
[0047]
The packaging bag 131 shown in FIG. 17 is different from the packaging bag 1 shown in FIG. 1 in that the left and right shoulder seal portions 132 and 133 are not provided with a welded portion between the front sheet and the rear sheet. It is. In the packaging bag 131 shown in FIG. 17, although not shown, the adhesive portion functions as an expansion preventing means by adhering between the shoulder seal portions of the upper portion of the main body portion with an adhesive, or The packaging bag of the present invention can be obtained by sandwiching the shoulder seal portion with a spread prevention means such as a clip. Of course, the spread preventing means is not limited to these.
[0048]
In the above description, the upper and left sides of the packaging bag are cut out in a rectangular shape and have a substantially rectangular pouring part. However, the present invention is not limited thereto, and the pouring part may have various shapes such as a trapezoid. Needless to say, it is good. FIG. 18 shows a packaging bag 141 having a pouring part having a shape in which the left and right sides of the upper part of the bag are cut out in an arc shape.
[0049]
Moreover, the picking part may be provided with a pick for opening, and FIG. 19 shows a packaging bag 151 provided with a pick 152 for opening.
FIG. 20 further shows another packaging bag 161 in which the position of the spread preventing means is different on the left and right.
[0050]
【Example】
Next, an Example is shown and it demonstrates in detail.
[0051]
Example 1
A laminated film having a four-layer structure in which a biaxially stretched nylon film having a thickness of 15 μm / adhesive / aluminum having a thickness of 7 μm / adhesive / polyester film having a thickness of 12 μm / adhesive / low-density polyethylene film having a thickness of 100 μm is laminated. A packaging bag as shown in FIG. 1 was produced using a low-density polyethylene film as an inner layer for the front sheet, the rear sheet, and the left and right gusset sheets. The heat seal temperature is 180 to 200 ° C.
The manufacturing conditions of the pouring part and the main body part in this packaging bag are as follows.
<Main unit> Main unit width: 80 mm, Main unit length (Vertical width when the contents are not filled): 210 mm, Left gusset sheet folding depth: 29 mm, Right gusset sheet folding depth: 29 mm, left shoulder Inclination angle 50 ° inside the seal part, inclination angle 50 ° inside the left shoulder seal part, body side welding side edge seal width: 7 mm
<Pouring part> Pouring part width: 34 mm, pouring part length: 30 mm, base end passage part width of the pouring passage: 16 mm, tip passage part width of the pouring passage: 9 mm, right gusset sheet folding depth: 10mm (including the depth of folding into the proximal passage: 4mm)
[0052]
(Example 2)
A laminated film having a four-layer structure in which a biaxially stretched nylon film having a thickness of 15 μm / adhesive / aluminum having a thickness of 7 μm / adhesive / polyester film having a thickness of 12 μm / adhesive / low-density polyethylene film having a thickness of 80 μm is laminated. A packaging bag as shown in FIG. 6 was produced using a low-density polyethylene film as an inner layer for the front sheet, the rear sheet, and the left and right gusset sheets. The heat seal temperature is 180 to 200 ° C.
The manufacturing conditions of the pouring part and the main body part in this packaging bag are as follows.
<Main unit> Main unit width: 80 mm, Main unit length (Vertical width when the contents are not filled): 210 mm, Left gusset sheet folding depth: 29 mm, Right gusset sheet folding depth: 29 mm, left shoulder Inclination angle 75 ° inside seal part, left shoulder seal part inclination angle 75 °, chamber width: 29 mm, chamber length: 10 mm, folding depth of left gusset sheet into the chamber: 4 mm, right gusset sheet into the chamber Folding depth: 4mm, main body weld side edge seal width: 7mm
<Pouring part> Pouring part width: 34 mm, pouring part length: 30 mm, base end passage part width of the pouring passage: 16 mm, tip passage part width of the pouring passage: 9 mm, right gusset sheet folding depth: 10mm (including the depth of folding into the proximal passage: 4mm)
[0053]
The obtained packaging bags of Examples 1 and 2 were filled with shampoo from the filling port, and the filling port was heat-sealed. Both filling capacities were 300 cc, and the self-supporting property was sufficient. Next, the front end of the closing passage is opened, the main body is lightly gripped, and a relatively low pressure is applied to the contents. As a result, the bag is bent in either the front or back direction near the base end of the dispensing passage. Embodiment 2 The contents moved through the extraction passage without causing the discharge passage to be blocked, etc., and the contents could be easily, reliably, and stably discharged from the opening. The contents could flow out more easily. In addition, if the contents remaining in the dispensing passage are squeezed out after the contents are poured out, the contents will leak out of the dispensing passage even if the bag is laid down unless pressure is applied to the contents in the bag. I did not.
[0054]
  In the same manner, FIG. 7 and FIG.Figure 13, FIG.Figure 16, the packaging bag having the structure shown in FIG. 17 was manufactured, the shampoo was accommodated, and the quality of the contents poured out from the dispensing passage was confirmed. In either case, good results were obtained.
[0055]
【The invention's effect】
Since the present invention is configured as described in detail above, the following effects can be obtained.
That is, the packaging bag of the present invention opens the closing tip of the pouring passage, for example, by lightly grasping the main body and applying a relatively low pressure to the contents, in the vicinity of the base end of the pouring passage. The contents move through the pouring passage without causing any obstruction of the pouring passage due to folding in either the front or back direction of the bag, and the required amount of content can be easily and reliably transferred from the opening with a small force. And it can be made to flow stably. Therefore, this packaging bag is markedly superior to conventional flat bags or standing pouches with a pouring passage for pouring contents. Since this packaging bag has a side gusset, it is suitable for storing a large amount of contents, and after the contents are filled and accommodated in the contents accommodating portion and sealed, the bottom is flattened. Therefore, the self-supporting property is good when the pouring part is set upward. Therefore, it is easy to store, transport, distribute, handle, etc. the bag with the contents contained therein, and even if the contents decrease after opening, with the pouring part standing upwards It can be used and is very convenient.
[Brief description of the drawings]
FIG. 1 is a front view showing an example of a packaging bag according to the present invention.
FIG. 2 is an exploded view of the packaging bag shown in FIG.
3 is an explanatory view showing an example of a method for producing the packaging bag shown in FIG. 1. FIG.
4 is a perspective view showing a state in which contents are accommodated in the packaging bag shown in FIG. 1. FIG.
FIG. 5 is a perspective view showing a usage state of the packaging bag shown in FIG. 1;
FIG. 6 is a plan view showing a packaging bag according to another embodiment of the present invention.
FIG. 7 is a plan view showing a packaging bag according to still another embodiment of the present invention.
8 is an explanatory view showing an example of a method for producing the packaging bag shown in FIG. 7. FIG.
FIG. 9 is a partial plan view showing a packaging bag according to still another embodiment of the present invention.
FIG. 10As a reference exampleIt is a fragmentary top view which shows the bag for packaging.
FIG. 11As another reference exampleIt is a fragmentary top view which shows the bag for packaging.
FIG.As yet another reference exampleIt is a fragmentary top view which shows the bag for packaging.
FIG. 13 is a partial plan view showing a packaging bag according to still another embodiment of the present invention.
FIG. 14 is a partial plan view showing a packaging bag according to still another embodiment of the present invention.
FIG. 15As yet another reference exampleIt is a fragmentary top view which shows the bag for packaging.
FIG. 16 is a partial plan view showing a packaging bag according to still another embodiment of the present invention.
FIG. 17 is a partial plan view showing a packaging bag according to still another embodiment of the present invention.
FIG. 18 is a partial plan view showing a packaging bag according to still another embodiment of the present invention.
FIG. 19 is a partial plan view showing a packaging bag according to still another embodiment of the present invention.
FIG. 20 is a partial plan view showing a packaging bag according to still another embodiment of the present invention.

Claims (9)

A contents storage section for storing the contents of the front sheet and the rear sheet facing each other, and the gusset sheets folded inward between the front sheet and the rear sheet are sandwiched from both the left and right with the folds facing each other and heat sealed. A bag having a side gusset in which an extraction passage is formed at the top of the bag,
The dispensing passage opens the closed tip and applies pressure to the contents accommodated in the contents accommodating portion, the contents flow out of the opening, and when the pressure is reduced, the outflow of the contents stops, When the remaining contents are squeezed out, it is formed in a bent shape so that the contents do not flow out unless pressure is applied even if the bag is placed sideways,
The upper part of the content storage part is formed so that the interval is narrowed upward by left and right shoulder seal parts and communicates with the base end part of the extraction passageway,
In the upper part of the bag, there is a pouring part that is cut out at a position outside the one fold line of the left and right gusset sheets, cut out at a position inside the fold line of the other gusset sheet, and protrudes upward from the main body part. Formed, the gusset sheet from the one side has reached only in the base end passage portion of the extraction passage ,
The packaging bag, wherein the left and right shoulder seal portions are provided with expansion preventing means for preventing the expansion of the gusset at substantially the same height as the base end portion of the extraction passage . A contents storage section for storing the contents of the front sheet and the rear sheet facing each other, and the gusset sheets folded inward between the front sheet and the rear sheet are sandwiched from both the left and right with the folds facing each other and heat sealed. A bag having a side gusset in which an extraction passage is formed at the top of the bag,
The dispensing passage opens the closed tip and applies pressure to the contents accommodated in the contents accommodating portion, the contents flow out of the opening, and when the pressure is reduced, the outflow of the contents stops, When the remaining contents are squeezed out, it is formed in a bent shape so that the contents do not flow out unless pressure is applied even if the bag is placed sideways,
The upper part of the content storage part is formed so that the interval is narrowed upward by left and right shoulder seal parts and communicates with the base end part of the extraction passageway,
In the upper part of the bag, is notched at the outer position than the fold of both the left and right gusset sheet, it is formed spout portion protruding upward from the body portion, the only prior Symbol dispensing the proximal passage section of the passage The gusset sheet from one side has arrived, the gusset sheet from the other side has not reached the dispensing passage ,
The packaging bag, wherein the left and right shoulder seal portions are provided with expansion preventing means for preventing the expansion of the gusset at substantially the same height as the base end portion of the extraction passage .   The packaging expansion according to claim 1 or 2, wherein the spread preventing means comprises a welded portion in which a front sheet and a rear sheet are welded at a position of a notch or a hole provided in the gusset sheet. bag. The dispensing passage includes a proximal end passage portion, a distal end passage portion, and an intermediate passage portion connecting the two. The proximal end passage portion is substantially directly above, and the distal end passage portion is substantially S-shaped substantially parallel to the proximal end passage portion. The packaging bag according to claim 1, wherein the packaging bag has a shape . The packaging bag according to claim 1, 2, 3, or 4, wherein the left and right shoulder seal portions are inclined on the content container side. The upper part of the content container is a small chamber having a width exceeding the base end width of the extraction passage, and the small chamber communicates with the base end of the extraction passage. The packaging bag according to claim 1, 2, 3, 4 or 5 . 6. Symbol mounting packaging bag, wherein at least one of the left and right gusset sheet is reached in the small chamber. It said body portion according to claim 3, 4, 5, 6 or 7 packaging bag according at least one of the side edges of the side edges is characterized by comprising a heat sealing. The packaging bag according to claim 1, 2, 3, 4, 5, 6, 7 or 8, wherein a side edge of the main body portion is formed by a fold of a cylindrical sheet.

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