JP3203011U - Packaging bag - Google Patents

Abstract

The present invention provides a packaging bag that can be opened linearly by cutting along a planned cut line and that can be formed beautifully after being opened. A folding portion 10 is formed by folding back one sheet piece, and a planned opening cut line 3 in the left-right direction is formed on each of a front sheet portion 1 and a rear sheet portion 2 near the folding portion 10. A fastener 8 capable of sealing the front sheet portion 1 and the back sheet portion 2 to each other is provided closer to the inside of the bag than the planned cut line 3, and the cut line 3 of the front sheet portion 1 and the back sheet portion 2 The planned cutting line 3 is disposed at the same height position H0, and the tearing strengths of the planned cutting lines 3 and 3 are the same. [Selection] Figure 2

Description

  The present invention relates to a packaging bag.

  2. Description of the Related Art Conventionally, an easy-open packaging bag has been proposed in which a cut (planned) line made of a perforation is placed near the upper side of a bag so that the bag can be torn and opened with fingers (see Patent Document 1).

JP-A-8-324597

As shown in FIG. 10, in the conventional packaging bag, a planned cut line 43 in the left-right direction is formed in the vicinity of the folded line portion 40 formed by folding the sheet piece 50, and closer to the inside of the bag than the planned cut line 43. Fasteners 44 were provided.
As shown in FIG. 11 (A), the planned cut line 43 is formed on the front side folded by the single rotary sewing machine blade 45 while continuously running with the sheet piece 50 folded back in advance. The sheet 41 and the sheet 42 on the back side were formed so as to break through at once.

However, in FIG. 11B, the depth at which the cutting edge of the rotary sewing machine blade 45 enters is different between the front side sheet 41 and the back side sheet 42, and the front side sheet 41 and the back side sheet 42 include Cut planned lines 43 having different width dimensions W ₁ and W ₂ were formed.
As shown in FIG. 12, when the cut line 43 is cut and opened, there is a difference in tear strength between the front sheet 41 and the rear sheet 42, and if W ₁ > W ₂ , The side sheet 41 is easily torn, and the front side sheet 41 and the back side sheet 42 are not torn at the same time, and the delayed tear side deviates from the planned cut line 43 and is torn. When the tear of the sheet 42 on the back side deviates from the planned cut line 43 as shown in the figure, an oblique tear residual portion 46 was formed at the cut end, which was not beautiful in appearance.

  In addition, when the front side sheet 41 and the rear side sheet 42 are cut at the same height, it is difficult to open the fastener 44 by grasping the edge of the cut with a finger. It was difficult to take out things and it took time and effort to take them out.

  Therefore, an object of the present invention is to provide a packaging bag that can be opened by tearing linearly along a planned cut line and that can be formed beautifully after being opened. Another object of the present invention is to make it easy to take out the package after opening.

  In the packaging bag according to the present invention, a folding line portion is formed by folding back one sheet piece, and an opening planned cutting line in the left-right direction is formed on each of the front sheet portion and the back sheet portion near the folding curve portion. A fastener capable of mutually sealing the front sheet portion and the back sheet portion is provided closer to the inside of the bag than the planned cut line, and the cut planned line of the front sheet portion and the back sheet portion The planned cut line is arranged at the same height position, and the tear strength of the planned cut line is the same.

In addition, a folding portion is formed by folding back one sheet piece, and a planned cutting line for opening in the left-right direction is formed on each of the front sheet portion and the back sheet portion near the folding curve portion. A fastener that can seal the front sheet portion and the back sheet portion to each other closer to the inside of the bag is provided, and the cut line of the front sheet portion and the cut line of the back sheet portion are, They are arranged with a predetermined small dimensional difference and are displaced in the vertical direction, and the tear strength of the planned cut line is the same.
The planned cut line is a perforation.
The planned cut line is a half-cut groove formed by a laser.

  According to the packaging bag of the present invention, the planned cutting line of the front sheet part and the planned cutting line of the back sheet part can be simultaneously torn and opened, and one cut end of the front sheet part and the back sheet part can be opened. The cut can be formed beautifully in a straight line without deviating from the above. In addition, the front sheet portion and the rear sheet portion are formed at the same height position, so that the appearance is good.

  In addition, the planned cutting line for the front sheet part and the planned cutting line for the back sheet part can be torn and opened at the same time, so that one of the front sheet part and the back sheet part does not deviate from the planned cutting line. And the cut end can be formed beautifully in a straight line. In addition, the cut edge of the front sheet part and the back sheet part is formed with a step with a small difference in size, and after opening, the edge of the cut edge can be grasped with a finger to easily open the fastener, and the packaged item is taken out Easy and convenient.

It is the front view which showed one Embodiment of this invention. It is an AA expanded sectional view of FIG. It is a principal part expanded sectional view which shows the manufacturing process and intermediate product of the packaging bag of this invention. It is the figure which showed other embodiment of this invention, (A) is a front view, (B) is a rear view. It is BB expanded sectional drawing of FIG. It is a principal part expanded sectional view which shows the manufacturing process and intermediate product of the packaging bag of this invention. It is a principal part expanded sectional view which shows the manufacturing process and intermediate product of the packaging bag of this invention. It is a front view which shows the use condition of the packaging bag of this invention. It is a rear view which shows the use condition of the packaging bag of this invention. It is a front view which shows the conventional packaging bag. It is the figure which showed the manufacturing process of the conventional packaging bag, (A) is sectional drawing, (B) is an expanded sectional view. It is a figure which shows the use condition of the conventional packaging bag, (A) is a front view, (B) is an expanded sectional view.

Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments.
As shown in FIGS. 1 and 2, the packaging bag of the present invention is formed by folding one sheet piece to form a fold line portion 10, and the inner surfaces of the front sheet portion 1 and the back sheet portion 2 are opposed to each other. In addition, the front sheet portion 1 and the back sheet portion 2 are welded to each other at the left and right side edge portions and the lower edge portion (lower side portion) to form a bag shape. The front sheet portion 1 and the back sheet portion 2 (sheet pieces) are made of a synthetic resin such as polypropylene or polyethylene, and have a laminate layer made of a thermoplastic resin on the inner surface side (not shown).
An article Z to be packaged is stored in an internal storage space 15 formed between the front sheet portion 1 and the back sheet portion 2. Examples of the packaged item Z include small items such as masks, cosmetics, and miscellaneous goods, or foods, medicines, and supplements. Note that “welding” is a process in which resins are bonded to each other without applying an adhesive by applying heat and pressing force, and can also be referred to as “thermocompression bonding” or “thermal welding”.

In each of the front sheet portion 1 and the back sheet portion 2 close to the folding line portion 10, left and right opening scheduled cut lines 3 are formed.
The planned cut line 3 is formed by straight perforations in which cut portions and non-cut portions are alternately arranged. The cut portion penetrates the front sheet portion 1 and the back sheet portion 2 and is formed in an extremely fine slit shape having a constant width dimension.
The planned cutting line 3 of the front sheet part 1 and the planned cutting line 3 of the back sheet part 2 are arranged at the same height position H ₀ , and the tearing strength of the planned cutting lines 3 and 3 is the same. .
The planned cut line 3 of the front sheet portion 1 and the planned cut line 3 of the back sheet portion 2 are formed to have the same pitch and the same width dimension. In the present invention, “tear strength” means the strength of the tensile force (external force) required for tearing, and “same tear strength” means that the tensile force required for tearing is within the range of ± 10%. It is intended to include those that are torn at the same time.

A fastener 8 capable of sealing the front sheet portion 1 and the back sheet portion 2 to each other is provided closer to the inside of the bag than the planned cut line 3.
The fastener 8 is composed of a chuck tape male portion 12 having a convex portion and a chuck tape female portion 13 having a concave portion into which the convex portion is fitted, and both the chuck tape male portion 12 and the chuck tape female portion 13 are front sheet portions. 1 and the back sheet | seat part 2 are welded so that a convex part and a recessed part may be made to oppose.
A through-hole 9 is provided at an intermediate height position between the planned cut line 3 and the fastener 8 for use in hanging display.

As shown in FIG. 3, two sheet cutting schedules are made by a pair of left and right rotary sewing blades 30, 30 that are continuously run in a state where the sheet piece is flatly developed and provided at an upper position of the sheet piece. Lines 3 and 3 are formed in parallel.
The sewing machine blade 30 is formed in a substantially disk shape, and is pivotally mounted around the axis X. The left and right sewing blades 30, 30 are interlocked and connected by a connecting shaft so as to rotate synchronously on the same axis (not shown).
The two scheduled cut lines 3 and 3 are formed at positions separated from the center line C in the left-right direction of the sheet piece by the same length dimensions L ₁ and L ₂ . When the sheet piece is folded back along the center line C, the planned cutting lines 3 and 3 are arranged so as to face each other at the same height position (see FIG. 2).

Next, another embodiment of the present invention will be described.
As shown in FIGS. 4 and 5, the packaging bag of the present invention has a folding line portion 10 formed by folding one sheet piece, and each of the front sheet portion 1 and the back sheet portion 2 near the folding line portion 10. In addition, a planned opening cut line 3 in the left-right direction is formed. A fastener 8 capable of sealing the front sheet portion 1 and the back sheet portion 2 to each other is provided closer to the inside of the bag than the planned cut line 3.

4 and 5, the planned cut line 3 of the front sheet portion 1 and the planned cut line 3 of the back sheet portion 2 are arranged with a predetermined small dimensional difference ΔH being displaced in the vertical direction.
Cut planned line of the front seat 1 3 is provided in the first height position H _1, cut planned line 3 of the rear seat 2, a second height below the first height position H ₁ position H ₂ Is provided.
As in FIGS. 1 and 2, the tear lines 3 and 3 are set to have the same tear strength.

As shown in FIG. 6, the sheet pieces are continuously run in a state of being flattened, and the two scheduled cutting lines 3, 3 are made parallel by the pair of left and right rotary sewing blades 30, 30. It is formed.
The sewing machine blade 30 is formed in a substantially disk shape, and is pivotally mounted around the axis X. The left and right sewing blades 30, 30 are interlocked and connected by a connecting shaft so as to rotate synchronously on the same axis (not shown).
One of the two cut planned line 3,3, is formed at a position separated by a length dimension L ₃ from the lateral center line C of the sheet piece, while the comparison (the than the length L ₃₎ target short length by the dimension L ₄ are formed at separate positions. When the sheet piece is folded back along the center line C, the cut lines 3 and 3 are displaced in the vertical direction with a slight dimensional difference ΔH by the difference between the left and right lengths L ₃ and L _4. (See FIG. 5).

As shown in FIG. 7, the planned cutting line 3 may be formed by laser irradiation. In this case, the planned cutting line 3 is preferably a half-cut groove formed by laser processing.
Two cut-out lines 3 and 3 are formed in parallel by a pair of left and right laser irradiation units 20 and 20 provided on the upper position of the sheet piece by continuously running the flat sheet-like sheet piece. The depth dimension of the half-cut groove is preferably set to 20% to 65% of the thickness dimension T of the sheet piece. The two scheduled cut lines 3 and 3 are formed so that the half cut grooves have the same depth dimension and the same tear strength. In the illustrated example, the two scheduled cut lines 3 and 3 are formed at positions separated from the center line C in the horizontal direction of the sheet piece by the same length dimensions L ₁ and L _2. , 3 may be formed at positions having different length dimensions from the center line C.

The usage method (action) of the packaging bag of the present invention described above will be described.
As shown in FIG. 8, when a predetermined tensile force (by a human hand) is applied to the upper edge where the folding line 10 is formed, the planned cut line 3 is torn, and the front sheet 1 and the back sheet The part above the cut lines 3 and 3 of the part 2 is cut off. At this time, the front sheet portion 1 and the back sheet portion 2 are simultaneously torn, and the cut edges of the front sheet portion 1 and the back sheet portion 2 are formed linearly and beautifully without departing from the cut line 3.

  In FIG. 9, when the front sheet portion 1 and the back sheet portion 2 are simultaneously torn along the planned cut line 3 and a part thereof is cut off, the edge portions of the cuts of the front sheet portion 1 and the back sheet portion 2. However, a step with a predetermined small dimensional difference ΔH is formed. The fastener 8 can be easily opened by grasping the edge of the front sheet portion 1 with a finger. Therefore, after the tear-off lines 3 and 3 are torn and opened, the article to be packaged Z can be taken out easily and quickly.

  Note that the design of the present invention can be changed, and for example, the through-hole 9 for use in hanging display may be omitted.

As described above, the wrapping bag according to the present invention is formed by folding one sheet piece to form the fold line portion 10, and each of the front sheet portion 1 and the back sheet portion 2 near the fold curve portion 10 has left and right sides. A cut-out line 3 for opening in the direction is formed, and a fastener 8 capable of sealing the front sheet part 1 and the back sheet part 2 from each other is provided closer to the inside of the bag than the cut-out line 3. The planned cut line 3 of the part 1 and the planned cut line 3 of the back sheet part 2 are disposed at the same height position H ₀ , and the planned tear lines 3 and 3 have the same tear strength. Therefore, the planned cut line 3 of the front sheet part 1 and the planned cut line 3 of the back sheet part 2 can be simultaneously torn and opened, and one cut end of the front sheet part 1 and the back sheet part 2 is scheduled to be cut. Without deviating from the lines 3 and 3, and the cut end Can be formed beautifully in a straight line. In addition, the front sheet portion 1 and the back sheet portion 2 are formed with the cut edges aligned at the same height position, and can be formed with a good appearance.

  Further, a folding line portion 10 is formed by folding back one sheet piece, and left and right opening scheduled cut lines 3 are formed on each of the front sheet portion 1 and the back sheet portion 2 near the folding curve portion 10. A fastener 8 capable of sealing the front sheet portion 1 and the back sheet portion 2 to each other is provided closer to the inside of the bag than the planned cut line 3, and the cut planned line 3 of the front sheet portion 1 and the above The above-mentioned scheduled cut line 3 of the back sheet portion 2 is disposed with a predetermined small dimensional difference ΔH and shifted in the vertical direction, and the tear strength of the planned cut lines 3 and 3 is the same. The scheduled cut line 3 of the part 1 and the planned cut line 3 of the back sheet part 2 can be simultaneously torn and opened, and one cut of the front sheet part 1 and the back sheet part 2 deviates from the planned cut lines 3 and 3. And cut the cut directly It can be beautifully formed in Jo. In addition, the front sheet portion 1 and the back sheet portion 2 have a cut edge with a predetermined small dimensional difference ΔH, and after opening, the edge of the cut edge can be grasped with a finger to open the fastener 8 easily. It is easy to take out the package Z and it is convenient.

  Further, since the planned cut line 3 is a perforation, it can be formed easily and inexpensively, and the manufacturing cost can be reduced.

  Further, since the planned cut line 3 is a half-cut groove formed by a laser, the planned cut line 3 can be formed with high accuracy, the unexpected cut of the planned cut line 3 is prevented, and the internal storage space 15 is sealed. Can keep sex. It is possible to reliably and beautifully form the planned cut line 3 that can be opened and cut with a constant tensile force. The tensile force required for tearing the planned cutting line 3 can be freely controlled.

DESCRIPTION OF SYMBOLS 1 Front sheet part 2 Back sheet part 3 Cut planned line 8 Fastener 10 Folding curve part H ₀ Height position (DELTA) H Small dimension difference

Claims (4)

A folding portion (10) is formed by folding back one sheet piece, and a tear-off cut in the left-right direction is formed on each of the front sheet portion (1) and the rear sheet portion (2) near the folding portion (10). A planned line (3) is formed, and a fastener (8) capable of sealing the front sheet part (1) and the back sheet part (2) is provided closer to the inside of the bag than the planned cut line (3). And
The planned cut line (3) of the front sheet part (1) and the planned cut line (3) of the back sheet part (2) are arranged at the same height position (H ₀ ), and The packaging bag, wherein the tearing strengths of the planned cut lines (3) and (3) are the same. A folding portion (10) is formed by folding back one sheet piece, and a tear-off cut in the left-right direction is formed on each of the front sheet portion (1) and the rear sheet portion (2) near the folding portion (10). A planned line (3) is formed, and a fastener (8) capable of sealing the front sheet part (1) and the back sheet part (2) is provided closer to the inside of the bag than the planned cut line (3). And
The planned cut line (3) of the front sheet part (1) and the planned cut line (3) of the back sheet part (2) are displaced in the vertical direction with a predetermined small dimension difference (ΔH). A packaging bag characterized by being disposed and having the same tear strength of the cut line (3) and (3).   The packaging bag according to claim 1 or 2, wherein the planned cut line (3) is a perforation.   The packaging bag according to claim 1 or 2, wherein the planned cut line (3) is a half cut groove formed by a laser.

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