JPH07132944A - Packing bag and manufacture therefor - Google Patents

Abstract

PURPOSE:To make it easy to find a position of a notch for introducing tearing formed on a seal. CONSTITUTION:A packing bag comprises a packing film 1 heat-sealed by a vertical seal 3 and a lateral seal 2, wherein a tearing introducing notch 4 is provided on at least one of the seals. At least a pair of protrusions 6 positioned across the notch 4 and protruding to either a surface or a rear face are provided on the seal 3 formed with the notch 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention can highlight the presence of minus notches, buoy notches, etc., which have been widely and conventionally provided in seasoning, soup, confectionery, and other film packaging bags to induce the opening of the packaging bags. The present invention relates to a packaging bag and a manufacturing method thereof.

[0002]

2. Description of the Related Art Notches such as a minus notch and a buoy notch formed in a sealing portion of a film packaging bag can be opened by tearing the packaging bag from its forming position without using scissors or other tools. Since it is extremely easy to make, most of the large and small film packaging bags now have such notches,
Among them, the minus notch is particularly frequently used because a cut piece of the packaging bag is not generated and therefore the cut piece is not likely to be mixed in the object to be packaged.

[0003]

However, the notch formed in the sealing portion of the packaging bag is often present only at one position of the vertical sealing portion or the horizontal sealing portion of the packaging bag, and normally, the notch is formed in the packaging bag. However, there is a problem that it is difficult to quickly find the position where the notch is formed because there is no special indication about the notch position. It was particularly serious in the absence of a tip, and more so when the user of the packaged item was an old person or a blind person.

The present invention has been made as a result of investigations aimed at solving the above-mentioned problems of the prior art, and the object of the present invention is to solve the problem regardless of the notch formation mode. It is an object of the present invention to provide a packaging bag capable of easily and quickly finding the position where the notch is formed, and a simple manufacturing method of the packaging film, even for a person with limited mobility.

[0005]

In the packaging bag of the present invention, one or two packaging films on both front and back sides are heat-sealed by a vertical sealing portion and a horizontal sealing portion, respectively, and At least one
In the place where the notch for opening guide is formed, the notch is formed in the seal portion, and the notch is located between them.
At least a pair of protrusions protruding toward the packaging film on either the front or back side is provided. Here, it is preferable that there be a plurality of pairs of protrusions, and it is preferable that each protrusion has an oval shape that extends along the notch.

Further, in the method for manufacturing a packaging bag of the present invention, in particular, in the automatic filling bag-making machine, the vertical seal portion and the horizontal seal portion are sequentially formed, and at the same time when at least one of the seal portions is formed, Each notch is formed so as to be spaced apart from the notch forming portion, and each of the protrusions is provided so as to protrude to the packaging film side on either the front or back side, and then the notch is formed between the respective protrusions. And another manufacturing method, also in an automatic filling bag-making machine, sequentially forms the vertical seal portion and the horizontal seal portion, and sandwiches at least one of the vertical seal portion and the horizontal seal portion before or after the notch is formed. The cooling rolls are provided so as to be spaced apart from the notch-forming portions and to have respective protrusions protruding toward either side of the packaging film. Still another method is to form each of the vertical seal portion and the horizontal seal portion in the same manner as described above, and at the same time as forming at least one of the seal portions, locate the notch formation portion at a distance, and either Each of the protrusions protruding toward the packaging film and the notches located between the protrusions are formed.

[0007]

In the packaging bag according to the present invention, even if the notch formed in the seal portion is a minus notch, the protrusion formed on the seal portion of the bag is made to crawl with a finger along the seal portion. By detecting with tactile sensation, the position where the notch is formed can be easily and quickly found even by a visually impaired person. After that, by visually or tactually confirming each pair of protrusions and tearing the bag from the notch position between the protrusions, the packaging bag can be opened easily and easily. By the way, in this case, when a plurality of pairs of respective protrusions located apart from the notch are formed and when the contour shape of each protrusion is a relatively large oval shape extending along the notch, It is possible to detect the protrusion by visual and tactile senses, and further to find the position where the notch is formed. Note that these are exactly the same when the notch is formed in any of the vertical seal portion and the horizontal seal portion in relation to the shape and size of the packaging bag.

Further, in the method for manufacturing a packaging bag of the present invention, the vertical sealing roll of the automatic filling bag-making machine makes a pair of vertical sealing rolls, and this also makes a pair of horizontal sealing pieces. Along with the formation of the lateral seal portions in sequence by the seal rolls, and at the same time as the formation of at least one of the seal portions, for example, under the cooperation of the convex portion and the concave portion provided on the surface of each pair of the seal rolls, By providing each protrusion located apart from the notch formation point, it is possible to easily form one or more protrusions in a general automatic filling bag manufacturing process without the need to additionally add the protrusion forming process. can do. And this is
After the vertical seal portion and the horizontal seal portion are sequentially formed, before or after the notch is formed, the respective protrusions are provided by the convex portion and the concave portion of the cooling roll that sandwich at least one of the vertical seal portion and the horizontal seal portion. This is also the case in the case, and the additional work step can be eliminated by forming at least a pair of protrusions while cooling the seal portion with the existing cooling roll.

Further, according to the other method of the present invention, the vertical seal portion and the horizontal seal portion are sequentially formed, and at the same time when at least one of the seal portions is formed, the respective projections located apart from the notch forming portion are formed. Is formed under the cooperation of a convex portion and a concave portion of a pair of seal rolls facing each other with a predetermined clearance, and a notch located between the protrusions is also formed, for example, in the seal rolls. When the ridge provided on one side is abutted against the surface of the other seal roll, the protrusion can be easily formed on the packaging bag, and a notch forming process independent from the automatic filling bag-making machine Can be omitted.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. The figure is a figure which illustrates the packaging bag which concerns on this invention. In the packaging bag of this example shown in a state in which the article to be packaged is wrapped, one piece of the packaging film 1 mostly made of a laminated film is folded back at the center portion in the width direction, and the heat-sealing layers thereof are mutually attached. While facing each other, the upper and lower end portions and the free side end portions of the film portions located on both the front and back sides are respectively heated by the horizontal seal portion 2 and the vertical seal portion 3 as shown by hatching in the figure. Seal it. Here, in the case where each of the packaging films on both the front and back sides is two films separated from each other, it is necessary to form the vertical seal portion also on the side end portion on the right side of the drawing.

In this packaging bag, at least one of the horizontal seal portion 2 and the vertical seal portion 3, that is, the vertical seal portion 3 in the figure.
Only, one minus notch 4 is provided near the horizontal seal portion 2 and oriented in the direction orthogonal to the extending direction of the vertical seal portion 3. The minus notch 4 opens at the side edge of the bag, but in order to secure the required sealing strength of the vertical seal portion 3, it is spaced a predetermined distance from the edge of the package storage space 5 in the vertical seal portion. It ends at the position where it was. Further, here, at the respective positions of the vertical seal portion 3 apart from the minus notch 4, one of the front and back sides of the packaging film, FIG.
In the cross-sectional view shown in (b), two pairs of protrusions 6 projecting toward the surface film are provided. Here, in the projection 6 shown in the figure, the contour shape is circular, but it may be polygonal shape such as triangle, quadrangle, star shape, or the like. It is also possible to dispose the pair of protrusions 6 arranged on the line segment orthogonal to each other on the line segment obliquely intersecting the minus notch 4.

According to the packaging bag constructed as described above, even if it is difficult or difficult to visually recognize the formation position of the minus notch 4, the seal portions 2 and 3 can be sandwiched by fingers. The presence of the protrusion 6 and the formation position of the minus notch 4 can be found very easily by tactile sensation only by moving the finger along the seal portions 2 and 3. Therefore, after that, the packaging bag is grasped by both hands so that the respective projections 6 forming a pair are located under the respective fingers of the left and right hands, and then the tearing of the packaging bag is started from the position of the minus notch 4. As a result, the packaging bag can be opened easily and smoothly.

By the way, in this example, when two or more pairs of the protrusions 6 separated by the minus notch 4 are formed, the protrusions 6 and by extension, the formation positions of the notches 4 can be more visually and tactually found. It can be done easily.

FIG. 2 is a view showing another embodiment of the present invention, in which the notch formed in the vertical seal portion 3 is a buoy notch 7 having a groove at the side edge of the packaging bag, and The contour shape of each of the pair of protrusions 8 located apart from the buoy notch 7 is an elliptical shape that is long in the extending direction of the buoy notch 7. According to this example, the size of the protrusion is larger than that shown in FIG. 1, so that the notch 7 can be found more easily. In this example, the notch can be a minus notch.

Although the embodiments shown in FIGS. 1 and 2 have been described above, the notches may be provided only in the horizontal seal portion or in both the vertical and horizontal seal portions, and either the vertical seal portion or the horizontal seal portion may be provided. It is also possible to form a plurality of notches on either side. In addition, in this packaging bag, it is also possible to project each of the pair of protrusions to the back side of the packaging film, and one protrusion to the front side, and the other protrusion to the back side. It is also possible to make each of them protrude.

FIG. 3 is a schematic diagram illustrating a heat-sealing mechanism of an automatic filling and bag-making machine which can be used for manufacturing the packaging bag as described above. In the figure, 11 is a winding roll for the packaging film, and 12 and 13 are guide rolls for the packaging film fed from the winding roll 11. Here, the packaging film 1 unwound from the winding roll 11
After passing through the guide rolls 12 and 13, the film is folded into two in the width direction by the film folding metal fitting 15, and then sent to the horizontal seal roll 17 through the vertical seal roll 16 which also functions as a pulling roll of the packaging film 1. To be

The vertical seal rolls 16 in this case are arranged parallel to each other in close proximity to each other, and each pair of rolls 16a is driven to rotate in the opposite direction, a heater built in each roll 16a, and a roll 16a. The vertical sealing roll 16 is composed of a flange-shaped heat-sealing blade 16b extending in the circumferential direction. The vertical sealing roll 16 includes free-side ends on the front and back sides of the packaging film 1 in which the heat-sealing layers are faced to each other and folded back. The portion is sandwiched between the heat seal blades 16b, and functions as a vertical seal as shown by hatching in the figure. In addition, the horizontal seal roll 17
A pair of two rolls 17a arranged and driven in the same manner as the rolls 16a, a heater built in each roll 17a,
The heat-sealing blade 17b extends in the lengthwise direction of the roll 17a and is arcuate in the circumferential direction. The packaging film 1 is formed by the heat-sealing blade 17b of the horizontal seal roll 17 at predetermined intervals in the lengthwise direction. This is also provided with a horizontal seal as shown by the diagonal lines in the figure.

After the vertical sealing is completed, the packing film 1, for example, liquid, viscous substance, powder, granular material, etc., is filled into the packaging film 1 which is sequentially subjected to the vertical sealing and the horizontal sealing in this manner. Of the packaging film 1 by feeding it by means of a nozzle 18 into the inside of the film 1, and by means of such a filling and, at the same time, a transverse seal, the packaging film 1 is provided in a continuous, predetermined packaging with respect to one another. It is considered as a bag.

By the way, in this apparatus, the notch forming means 19 which operates at the same timing as the horizontal seal roll 17 is provided on the vertical seal portion 3 of each packaging bag manufactured as described above.
The cutter blade 19a, which rotates in the horizontal plane, forms a minus notch, and then the cutter roll.
By 20, the packaging bags are cut and separated at the intermediate position of the horizontal seal portion 2 one by one or every plural required bags. Depending on the type of device, there is a device in which a perforation-shaped tear forming means is provided instead of the cutter roll 20.

When manufacturing a packaging bag having the protrusions 6 and 8 as described in FIGS. 1 and 2 in such an automatic filling and bag-making machine, for example, the heat-sealing blade 16b of the vertical seal roll 16 is used. , At one or more points on the circumference,
As illustrated in FIG. 2, a pair of two recesses 16 located close to the point where the minus notch is formed but separated from the point.
c on one of the heat-sealing blades 16b, spaced circumferentially and exactly corresponding to their respective recesses 16c, for pushing the packaging film 1 into these recesses, which also By providing a pair of individual convex portions 16d on the other heat-sealing blade 16b, the packaging film 1 passing between the two heat-sealing blades can be formed with the vertical sealing portion 3 and the front and back sides of the packaging film can be formed. A pair of protrusions 6 or 8 protruding to either side can be formed.

In this way, for the packaging film 1 on which the vertical seal portion 3 and the protrusion are simultaneously formed, the transverse seal portion 2 is subsequently formed to form a packaging bag, and then the notch. Under the action of the forming means 19, the minus notch 4 is formed at a predetermined position between the pair of protrusions 6 or 8 provided on the vertical seal portion 3.

When a buoy notch is formed in the vertical seal portion 3 of the packaging bag, a horizontal swiveling blade having a V-shaped cutting edge is passed through the V-groove receiving blade as in the prior art.
The buoy notch can be shear formed between the protrusions.

The above is almost the same when the protrusion is formed on the horizontal seal portion 2. In this case, the length of the heat seal blade 17b of the horizontal seal roll 17 is formed on the surface of the heat seal blade 17b. Two pairs of recesses located at intervals in the direction,
Further, by providing the other heat-sealing blade 17b with respective convex portions positioned corresponding to those concave portions, the lateral sealing portion 2 is formed in the packaging film 1 that has passed between both heat-sealing blades, The formation of the protrusion can be performed at the same time. Then, the formation of the notch between the pair of protrusions formed in this way is performed by, for example, pressing the other heat-sealing blade 17b with a minus cutting blade or the like provided on one of the heat-sealing blades 17b, or This can be performed after the horizontal seal roll 17 in cooperation with the one minus cutting edge of the horizontal seal part cooling roll and the other cooling roll forming a pair.

When the protrusion is formed on the vertical seal portion 3 or the horizontal seal portion 2 in this manner, it is not necessary to add a special step to the filling / bag-making process using a general automatic filling bag-making machine. In addition, it is possible to easily and easily form the projection as intended.

Here, the plural pairs of protrusions can be formed by providing the heat-sealing blades 16b or 17b with a required pair of recesses and protrusions at intervals in the width direction thereof. According to this, a desired pair of protrusions can be formed by one passage of the packaging film 1 between the heat seal blades. Further, the formation of the protrusions on both the horizontal seal portion 2 and the vertical seal portion 3 of the packaging bag can be performed by the combination described above.

Here, as described above, in the case where the protrusion is formed on at least one of the horizontal seal portion 2 and the vertical seal portion 3, a pair of concave and convex portions provided on the heat seal blades 16b and 17b are paired with each other. One of the heat-sealing blades is provided with a ridge that protrudes outward in the radial direction and bisects each concave or convex portion, and the ridge contacts the other heat-sealing blade when the heat-sealing roll rotates. By contacting, the notch forming means 19 is omitted from the automatic filling bag making machine, and at the time of forming at least one of the horizontal seal portion 2 and the vertical seal portion 3, in addition to the pair of protrusions, those protrusions The notch located in between can be formed by pressing the molten film by the ridge.

Further, the protrusions are formed on at least one of the vertical seal portion 3 and the horizontal seal portion 2 by sequentially forming the seal portions 3 and 2 and then forming the protrusions on the front side or the rear side of the notch forming means 19. It can also be carried out by using a cooling roll arranged at. That is, although omitted in FIG. 3, in a general automatic filling bag making machine, at least one of the vertical seal portion 3 and the horizontal seal portion 2 is provided below the horizontal seal roll 17 and above the notch forming means 19. Since it is often the case that a cooling roll provided with a cooling blade corresponding to the shape and size of is provided, when such a cooling roll is provided,
The roll, by a pair of cooling blades, when sandwiching and cooling the high temperature seal portion, provided in these cooling blades, with the same recesses and protrusions as described above, by imprinting the seal portion, It is possible to form a required pair of protrusions located apart from the position where the notches are formed. Therefore,
Also in this case, no special processing step for forming the protrusion is required at all.

[0028]

Thus, according to the packaging bag of the present invention,
In particular, the presence of the pair of protrusions allows the notch formation position to be easily and quickly found visually or by tactile sensation. Further, according to the manufacturing method of the present invention, a special processing step is added. The protrusion can be easily and reliably formed at a desired position without the need.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing another embodiment of the present invention.

FIG. 3 is a diagram illustrating a heat sealing mechanism of an automatic filling bag making machine.

FIG. 4 is a vertical cross-sectional view illustrating a protruding portion forming portion of a vertical seal roll.

[Explanation of symbols]

 1 Packaging film 2 Horizontal seal part 3 Vertical seal part 4 Minus notch 5 Storage space for items to be packaged 6, 8 Projection 7 Buoy notch 16 Vertical seal roll 16a Roll 16b Heat seal blade 16c Recess 16d Convex part 17 Horizontal seal roll 17a Roll 17b Heat seal blade 19 Notch forming means 19a Cutter blade 20 Cutter roll

Claims (6)

[Claims] 1. A packaging bag in which a packaging film on both the front and back sides is heat-sealed by a vertical seal portion and a horizontal seal portion, and a notch is formed in at least one of the seal portions, the notch being formed. A packaging bag provided with at least a pair of protrusions, which are located apart from the notch and which protrude toward the packaging film on either the front or back, in the seal portion. 2. The packaging bag according to claim 1, wherein a plurality of pairs of respective protruding portions located apart from the notch are provided. 3. The packaging bag according to claim 1, wherein each of the protrusions located apart from the notch has an oval shape extending along the notch. 4. A longitudinal sealing portion is used for manufacturing a packaging bag in which a packaging film on both front and back surfaces is heat-sealed by a vertical sealing portion and a horizontal sealing portion, and a notch is formed in at least one of the sealing portions. And the horizontal seal portion are sequentially formed, and at the same time when at least one of those seal portions is formed, the protrusions that are located apart from the notch formation portion and project to the packaging film side of either the front or back side are formed. Provided,
After that, a notch is formed between each of the protrusions, which is a method of manufacturing a packaging bag. 5. A vertical sealing portion is used for manufacturing a packaging bag in which a packaging film on both front and back surfaces is heat-sealed by a vertical sealing portion and a horizontal sealing portion, and a notch is formed in at least one of the sealing portions. And the horizontal seal portion are sequentially formed, and before or after the notch is formed, the cooling roll that holds at least one of the vertical seal portion and the horizontal seal portion separates the notch formation portion from either the front side or the back side. The method for manufacturing a packaging bag, wherein each of the projections is provided so as to project toward the packaging film. 6. A longitudinal sealing portion is used for manufacturing a packaging bag in which a packaging film on both front and back sides is heat-sealed by a vertical sealing portion and a horizontal sealing portion, respectively, and a notch is formed in at least one of the sealing portions. And lateral seal portions are sequentially formed, and at the same time as the formation of at least one of those seal portions, the projection portions are located apart from the notch formation portion, and each projecting portion projects to the packaging film side of either the front or back surface, A method of manufacturing a packaging bag, characterized in that each of the notches located between the protrusions is formed.