JPH0676074U - Easy to open synthetic resin bag - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a synthetic resin bag that can be easily opened using a cutting thread. [Structure] A bag main body that forms a peripheral seal portion by heat-sealing the peripheral portions of two front and rear walls and a storage space inside, and heats along the unsealing line on one inner side surface of the bag main body. Fused,
A cut thread whose both ends are heat-fused in a sandwiched state to the corresponding portion of the peripheral seal portion, and a portion corresponding to one side of the peripheral seal portion of the bag body is cut, and a knob formed so as to be integrally separable from one end of the cut thread In a bag made of synthetic resin which is easy to open and has a piece, the peripheral seal portion provided with the knob piece bulges outward to form an ear portion, and the ear portion is cut out to provide the knob piece. . Therefore, in the upper part of the bag body, the boundary line between the peripheral seal portion and the storage space can be made straight over the entire length without bulging inward, so that the filling space in the storage space of the bag body can be filled. It is possible to carry out the extraction work very smoothly.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a synthetic resin bag that can be easily opened using a cutting thread.

[0002]

[Prior art]

 Conventionally, one form of a synthetic resin bag that can be easily opened using a notch thread is shown in FIGS. 16 and 17.

In the synthetic resin bag B, as shown in both figures, the peripheral edges of two synthetic resin films 50 and 51 are heat-sealed to form a peripheral seal portion 52 and a storage space 53 inside. The formed bag main body 54 and one side inner surface of the bag main body 54 were heat-sealed along the opening position, and both ends were heat-sealed to be sandwiched between the corresponding portions 52a and 52b of the peripheral seal portion 52. A cut piece 55 and a part 52a corresponding to one side of the peripheral edge seal portion 52 of the bag main body 54 are cut, and a knob piece 56 (a U-shaped slit 56a and a long groove 56b is formed so as to be integrally separable from one end of the cut thread 55. Consists of) and.

When the synthetic resin bag is opened, the knob piece 56 is picked with a finger and pulled along the opening line 57 as shown in FIG. 17, whereby the synthetic resin film 50 is cut by the cutting thread 55. It can be easily opened by slitting.

However, such a synthetic resin bag still has the following problems to be solved.

[0006]

[Problems to be solved by the device]

 That is, as shown in FIG. 16, the peripheral seal portion 52 in the synthetic resin bag B normally has the same heat-welding width over the entire circumference, but the portion provided with the knob 56 has the same width. In order to secure the strength in the portion, the boundary line 58 between the peripheral seal portion 52 and the storage space 53 needs to be inserted inside.

Therefore, after the bag body 54 is cut with scissors or the like along an imaginary cutting line immediately above the cutting thread 55, when the filling is taken out from the cutting opening 59, the width of the cutting opening is Since the width of the main body 54 was narrower than that of the other parts, it was difficult to take out the filling material. Similarly, it was also difficult to fill the filling material inside.

An object of the present invention is to provide a synthetic resin bag that can solve the above problems.

[0009]

[Means for Solving the Problems]

 According to the present invention, a bag main body is formed by heat-sealing the front and rear walls of two front and rear walls to form a peripheral seal portion and a storage space inside the bag main body. Heat-sealing, and both ends are heat-sealed in a state of being sandwiched between the corresponding portions of the peripheral seal portion, and the notch thread on one side of the peripheral seal portion of the bag body is cut, and integrated with one end of the notch thread. In a synthetic resin bag that is easy to open and has a detachable tab, the peripheral seal portion provided with the tab is bulged outward to form an ear, and the ear is cut out to The present invention relates to a bag made of synthetic resin, which is provided with a tab.

According to the present invention, the peripheral edges of the bottom wall, which is interposed between the front and rear walls and the lower ends of the front and rear walls and has both side edges bent downward in a mountain shape, are heat-sealed together. The bag body that forms the seal part and the storage space inside is heat-sealed along the opening line to the inner surface on one side of the bag body, and both ends are clamped to the corresponding parts of the peripheral seal part. An easy-to-open synthetic resin bag with a notch thread that is heat-sealed to the inside of the bag body, and a knob that cuts one side of the peripheral edge seal part of the bag body and is peelable integrally with one end of the notch thread In the above-mentioned, a bag made of synthetic resin, characterized in that a peripheral seal portion provided with a knob is bulged outward to form an ear, and the ear is cut out to provide the knob. is there.

[0011]

【Example】

 Hereinafter, the synthetic resin bag A according to the present invention will be specifically described with reference to the embodiments shown in the accompanying drawings.

In FIG. 1 to FIG. 13, 10 is a heat-sealing member for substantially the entire circumference of two substantially rectangular front and rear walls 11, 12 and one bottom wall 13 having a rectangular shape in a side view. It is a bag body made of synthetic resin which is sealed in a sealed state by means such as a container. As shown in FIG. 1, FIG. 8 and FIG. 9, dried fruits and other fillings F are stored inside thereof in a filled state. It forms a storage space 14 for

Further, in the bag body 10, as shown in FIGS. 1, 3 and 5, the cutting thread 15 is heat-sealed to the upper inside of the rear wall 12 of the straight cylindrical portion 10 a which is the upper portion of the bag body 10. is doing. The cutting thread 15 extends in a direction traversing the bag body 10, and both ends thereof end at outer ends of the left and right peripheral edge seal portions 22 and 23 of the bag body 10.

Further, a knob 17 is connected to one end of the cutting thread 15, and by picking the knob 17 and pulling it together with the cutting thread 15, the rear wall 12 is cut and the upper portion of the bag body 10 is opened. be able to.

Further, as shown in FIGS. 1 and 2, the bag body 10 includes a sealing fastener 18 below the cutting thread 15 and extending in parallel with the cutting thread 15.

As shown in FIGS. 4 and 5, the sealing fastener 18 has a long female member 19 having a U-shaped cross section welded to the inner surface of the front wall 11 and the inner surface of the rear wall 12. It is formed by providing a long fitting ridge 21 which is detachably fitted into the fitting groove 20 of the female member 19.

With such a configuration, the upper part of the bag body 10 is cut with the cutting thread 15, the sealing fitting between the fitting groove 20 and the fitting projection 21 is released, and the filling material F is partially taken out, and then, again. By sealingly fitting the fitting groove 20 and the fitting ridge 21 with each other, it is possible to prevent moisture and keep the freshness of the filling material F as long as possible.

The present invention is characterized by the attachment structure of the gripping piece 17 in the synthetic resin bag A having the above-described configuration.

The knob 17 substantially has a semi-circular ear portion 37 projecting outward from the end edge of the left peripheral edge seal portion 22, and an inner portion at a distance from the outer end of the ear portion 37. It is formed by a U-shaped notch slit 38 located and a transverse opening groove 39 at a position adjacent to the notch slit 38 and close to the inside of the bag body 10.

The notch slit 38 has a circular cut 38 a provided at a distance from the lateral outer end of the left peripheral seal portion 22, and a pair of side cuts 38 b and 38 c symmetrically provided on both sides of the cutting thread 15. Composed of.

The inner ends of the side cuts 38 b, 38 c are straight so as to be well connected to the transverse groove 39 when the knob 17 is pulled, or are inclined toward the cutting thread 15.

As shown in detail in FIG. 13, the transverse groove 39 traverses the cutting thread 15 between the inside of the bag body 10 and the inside ends of the side cuts 38b and 38c of the notch slit 38. Moreover, the cutting thread 15 passes through the central portion of the transverse groove 39.

The transverse groove 39 has a length L ₁ transverse to the cutting thread 15, which is greater than the distance D between the inner ends of the side cuts 38b, 38c of the notch slit 38, and thus When the knob 17 is pulled upward, the inner ends of the side cuts 38b and 38c can surely reach the transverse groove 39 accurately.

Further, the transverse groove 39 has an inner tapered end 39 a provided near the inside of the bag body 10 and provided on the cutting thread 15. The inner tapered end 39a is at an angle of 90 ° or less with respect to the cutting thread 15 as measured from the opening end toward the inside of the bag body 10. With the above configuration, the cutting thread 15 can always be guided along the line of the transverse groove 39. The end of the cutting thread 15 is connected to the tab 17, and this end is sandwiched between the front and rear walls 11 and 12 of the peripheral seal portion 22.

Further, as described with reference to FIG. 13, the knob piece 17 is provided on the semi-circular ear portion 33 protruding outward from the outer edge of the left peripheral edge seal portion 22. .

Therefore, as shown in FIGS. 2 and 13, the boundary line b between the peripheral edge seal portion 22 and the storage space 14 does not bulge inward at the upper portion of the bag body 10 and is straightened over the entire length. Therefore, it is possible to smoothly perform the filling work and the taking-out work of the filling material F into the storage space 14 of the bag body 10.

The shape of the ear portion 37 is not limited to the semi-circular shape, and may be a rectangular shape or a triangular shape.

Further, in the present embodiment, as shown in FIG. 13, the knob 17 is provided with a color mark M ₁ of a color different from that of the bag body 10 on the periphery thereof, and the knob display portion is provided inside thereof. Has M ₂ . Then, the knob piece display unit M _2, and is marked "TAB". The color mark M ₁ may be any color as long as it has a clear contrast with the color of the bag body A.

Since the color mark M ₁ and the knob display portion M ₂ are provided, the position of the knob 17 can be easily visually recognized, and the pulling direction of the knob 17 or the notch direction of the notch 15 Since it is easy to see, the notch work can be done easily and smoothly.

Other structural features of the above embodiment will be described below.

As shown in FIG. 2, in the synthetic resin bag A according to this embodiment, the front shape of the bag body 10 is substantially trapezoidal when the filler F is not stored.

That is, as shown in FIG. 2, the front and rear walls 10 and 11 constituting the bag body 10 are downwardly moved from the ends of the upper linear portions 11a and 12a and the upper linear portions 11a and 12a, respectively. It is composed of lower taper portions 11b and 12b whose width gradually increases toward the bottom.

In the bag body 10, the pair of front and rear walls 11 and 12 having a substantially trapezoidal shape are overlapped with each other, and the bottom wall 13 bent upward in a mountain shape is inserted between the lower end portions. Then, the peripheral edges of the front and rear walls 11, 12 are heat-sealed except for the lower end edges to form the left and right peripheral edge seal portions 22, 23 and the upper peripheral edge seal portion 24, and the lower ends of the front and rear walls 11, 11. The edge is heat-sealed to the corresponding lower edge of the bottom wall 20 to form a pair of lower edge peripheral sealing portions 25, 26. As will be described later, since the rectangular mountain-shaped bottom wall 13 is expanded into a rectangular flat shape, the lower end peripheral seal portions 25 and 26 are not integrally heat-welded.

In addition, a portion of the left and right peripheral edge seal portions 22, 23 which is located above the lower edges 22a, 23a by the height H of the bottom wall 13 in the folded state, and both side edges 25a of the lower edge seal portions 25, 26. , 25b, 26a, 26b, the lower ends of the front and rear walls 11 and 12 and the corresponding lower ends of the bottom wall 20 are heated along the line connecting the inner side of the height H by an amount substantially equal to the height H. It is fused and forms oblique seal parts 27, 28, 29, 30. As will be described later, since the inverted trapezoidal chevron-shaped bottom wall 13 is expanded into a rectangular flat shape, the slanted seal parts 27, 28 and 29, 30 are the same as the lower end peripheral seal parts 25, 26. Not heat welded to.

The front and rear walls 11, 12 and the bottom wall 13 are preferably manufactured by laminating a required number of synthetic resin films, respectively, as shown in FIG. By heat-welding the peripheral edges of 12 and the bottom wall 13 under pressure using a heat seal bar or the like, the bag main body 10 having the sealed storage space 14 formed therein can be formed.

With the above-described structure, as shown in FIGS. 2 to 5, the synthetic resin bag A has a flat side surface shape when the storage space 14 is not yet filled with the filling material F. In addition to having a cross-sectional shape on the side of the wheel, it also has a trapezoidal front shape in which the width gradually expands from the upper end to the lower part.

On the other hand, when the filling material F is filled inside, the bottom wall 13 that has been folded into an inverted trapezoidal chevron shape expands in the front-rear direction to form a rectangular shape, as shown in FIGS. 1 and 10. In addition to forming the flat surface of the bag, as shown in FIGS. 8 and 9, the storage space 14 having a sufficient size is formed inside the bag body 10, and the storage space 14 is filled with a sufficient amount. Item F can be filled.

In addition, as shown in FIGS. 1 and 10, the bag body 10 has a bottom wall 13 in a filled state, which is expanded in the front-rear direction and has a sufficient contact area such as a rectangular shelf. Since it can be secured, it can be placed on a shelf etc. in an independent state, which is convenient for storage and display.

Furthermore, when the bag body 10 is filled with a certain amount of the filler F, as shown in FIG. 1, not only the bottom wall 13 expands in the front-rear direction to change from a chevron shape to a flat shape, The upper and lower front and rear walls 11 and 12 also bulge in the front-rear direction centering on the central portion except for the upper portion not filled with the filler F, and as a result, as shown in FIGS. 1, 6 and 7. As described above, the width of the upper portion not filled with the filler F is maintained as it is, while the widths of the other portions filled with the filler F 2 are narrowed.

However, as described above, in the present invention, when the synthetic resin bag A is not filled, that is, when the side surface is flat as shown in FIG. Since the width is gradually expanded in a taper shape, when the filling body F is filled with the filling body F, even if the width of the portion where the bag body 10 is filled with the filling body F becomes narrow, And, as shown in FIG. 4, the width of the narrowed portion is substantially equal to the width of the upper portion, and is not extremely narrower than the width of the upper portion.

Therefore, when it is placed on a shelf or the like, it can be placed in an extremely stable state.

Therefore, it is possible to prevent only the upper part of the synthetic resin bag A from contacting only the upper part of the adjacent synthetic resin bag A when the synthetic resin bag A is placed on the shelf or taken out. However, the synthetic resin bag A can be reliably prevented from falling over the entire length of its left and right side edges.

Moreover, as shown in FIG. 1, the synthetic resin bag A according to the present invention visually gives a stable impression to the purchaser and promotes the purchase will.

Further, since the synthetic resin bags A placed adjacent to each other on a shelf or the like can be brought into close contact with each other over the entire length of the left and right side edges thereof, the synthetic resin bags A can be placed between the side surfaces of the adjacent synthetic resin bags A. A wasteful space is generated, and the number of synthetic resin bags A that can be placed on a unit length area such as a shelf can be increased.

In particular, in the present embodiment, the dimensional relationship of the oblique cut seal portions 27, 28, 29, 30 is set to the following values.

That is, the width W ₁ of the upper inside opening of the bag body 10, the width W ₂ between the lower ends of the oblique cut seal portions 27, 29 (28, 30), and the oblique cut seal portions 27, 29 (28, 30). The relationship with the width W ₃ between the upper ends of) is W ₂ <W ₁ <W ₃ .

By setting the width relationship of the synthetic resin bag A in this way, when the filling material F is filled in the bag body 10, as shown in FIG. 1 and FIG. The shape can be a stable box shape.

By the way, in this embodiment, when the bag body 10 is filled with the filling material F, as shown in FIGS. 1, 6, 9 and 10, the oblique cut seal portions 27, 28 and 29, respectively. The part sandwiched between 30 forms isosceles triangular vertical walls 13a, 13b.

However, in the present embodiment, the lower end portions of the front and rear walls 11,12 forming both sides of the lower end portions 22b, 23b of the left and right peripheral edge seal portions 22,23 form the skirt portions 31,32, and the skirt portion 31,32 is formed. , 32 hide the above-mentioned vertical walls 13a, 13b, so that the appearance of the synthetic resin bag A is not spoiled. Also, desired printing can be applied to the skirt portions 31 and 32.

Further, as shown in FIG. 11, the lower end portions 22b and 23b of the left and right peripheral edge seal portions 22 and 23 forming a part of the skirt portions 31 and 32, and both edge portions of the lower end peripheral edge seal portions 25 and 26. The following relations are established between 25a, 26a, 25b, and 26b.

That is, as shown in FIG. 11, the lower ends 22b and 23b of the left and right peripheral seal portions 22 and 23 have a constant taper angle α when the bag body 10 is not filled with the filling material F. However, the same taper angle α is also applied to both edges 25a, 26a, 25b, 26b of the lower edge peripheral sealing portions 25, 26, and the lower edge portions 22b, 23b of the left and right peripheral edge sealing portions 22, 23 and the lower edge peripheral edge portions The angle β formed by the both edge portions 25a, 26a, 25b, 26b of the seal portions 25, 26 is approximately 90 °.

Therefore, when the bag body 10 is filled with the filling material F, as shown in FIGS. 1 and 6, the lower ends 22b and 23b of the left and right peripheral edge seal portions 22 and 23 support the bag body 10. Although it is perpendicular to the surface on which shelves are placed, at the same time, the lower edges of the lower edge peripheral seals 25 and 26 and the lower edges of the skirts 31 and 32 are also placed. By abutting on the placing surface, the synthetic resin bag A can be supported in a stable state and beautifully like a shelf.

Further, as shown in FIG. 12, in the present embodiment, the cutting yarn 15 has a three-layer concentric circle structure, and is composed of the central yarn 34, the intermediate adhesive layer 35, and the outer heat welding layer 36. Become. The outer heat-welding layer 36 is fixed to the central yarn 34 by the intermediate adhesive layer 35.

The center yarn 34 is preferably made of polyester, and preferably has a circular cross section. However, the central thread 34 can also have an elliptical, polygonal, etc. cross section, or can be splined on its outer surface.

The intermediate adhesive layer 35 is formed by coating the central yarn 34 with neoprene.

However, the intermediate adhesive layer 35 can also be a nitrile rubber made of epoxy polyamide.

The outer heat-welding layer 36 is preferably made of polypropylene and is formed so as to be concentric with the intermediate adhesive layer 35. However, the outer heat-welding layer 36 can be made of polypropylene or a copolymer of polyethylene and polypropylene.

The cutting thread 15 having such a three-layer structure can be fixed to the inner surface of the rear wall 12 of the bag body 10 by welding the outer heat-welding layer 36 over the entire surface.

However, the cutting thread 15 does not necessarily have to have a three-layer structure, and may have a single-layer structure.

The synthetic resin bag A according to the present invention can be manufactured by mounting it on an automatic manufacturing line. In this case, the side edges of the trapezoidal front and rear walls 11 and 12 that form the bag body 10 are formed. Can be performed by a punching process as well as an ordinary cutter. In the case of punching, a flexible thin blade is used, so the side edge can be not only a straight line shape but also an arbitrary curved line, and the overall shape of the synthetic resin bag A can be made stable. It is possible to make the shape suitable for the taste of the consumer while securing

14 and 15 show a modified example of the synthetic resin bag A described above. The modified example shown in FIG. 14 is a case where the bag body has a wide structure, and the modified example shown in FIG. The example is characterized in that the skirt portions 31 and 32 described above are unnecessary. That is, in terms of aesthetics, the synthetic resin bag A according to the present modification is inferior to the synthetic resin bag A shown in FIGS. 1 to 13, but the synthetic resin bag A according to the present modification is easy to manufacture. Bag making A is superior to the synthetic resin bag A shown in FIGS.

In addition, in the above-described embodiment, as an embodiment to which the present invention can be applied, the bag body 10 is substantially the entire circumference of the two substantially rectangular front and rear walls 11 and 12, and one bag. The bottom wall 13 has an inverted trapezoidal shape when viewed from the side, and is made of a synthetic resin that is hermetically sealed by heat fusion or the like.

However, the bag body 10 to which the present invention is applicable is not limited to the bag body 10 described in any of the illustrated embodiments, and for example, the bag body described with reference to FIGS. 16 and 17. Needless to say, the present invention is also applicable to a bag body that includes only the front and rear walls 50 and 51 without a bottom wall, such as the body 54.

[0064]

【effect】

 As described above, according to the present invention, the peripheral portions of the front and rear walls of the two sheets are heat-sealed to form the peripheral seal portion and the storage space inside, and the bag body and the inner surface on one side of the bag body. Notch thread that is heat-sealed along the tear line and heat-sealed at both ends to the corresponding portion of the peripheral seal portion and one side of the peripheral seal portion of the bag body are cut, and one end of the notched thread is cut. In a bag made of synthetic resin that is easy to open and is provided with a knob that is integrally separable with the ear, the peripheral seal portion provided with the knob bulges outward to form an ear. The above-mentioned tab is provided by cutting out the portion.

Therefore, in the upper part of the bag body, the boundary line between the peripheral seal portion and the storage space can be made straight over the entire length without bulging inward, so that the space filled in the storage space of the bag body can be filled. It is possible to perform the filling work and take-out work of the extremely smooth.

[Brief description of drawings]

FIG. 1 is a perspective view of a synthetic resin bag according to the present invention in a stored state.

FIG. 2 is a front view of the synthetic resin bag in a non-stored state.

FIG. 3 is a side view of the same.

4 is a cross-sectional side view taken along the line I I of FIG.

FIG. 5 is an enlarged cross-sectional side view of the relevant part.

FIG. 6 is a front view of the same synthetic resin bag in a stored state.

FIG. 7 is a side view of the same.

FIG. 8 is a side view of the same section.

9 is a sectional front view taken along the line II-II of FIG.

FIG. 10 is a bottom view of the same.

FIG. 11 is an enlarged front view of the lower portion of the bag body.

FIG. 12 is a sectional view of a cutting thread.

FIG. 13 is an enlarged front view of the knob piece forming portion.

FIG. 14 is a front view of a modified example of the synthetic resin bag.

FIG. 15 is a front view of another modification of the synthetic resin bag.

FIG. 16 is a front view of a conventional synthetic resin bag.

FIG. 17 is a perspective view of the same.

[Explanation of symbols]

 A Synthetic resin bag 10 Bag body 11 Front wall 12 Rear wall 13 Bottom wall 15 Cutting thread 17 Picking piece 22 Left side peripheral sealing part 23 Right side peripheral sealing part 24 Upper end peripheral sealing part 25 Lower end peripheral sealing part 26 Lower peripheral sealing part 37 Ear Department

Claims (2)

[Scope of utility model registration request] 1. The front and rear walls (11), (12) peripheral edges are heat-sealed to form a peripheral sealing portion, and a storage space (14) is provided inside.
On the inner surface of the bag body (10) forming the and the bag body (10) on one side,
Notch thread (15) heat-sealed along the opening line and heat-sealed at both ends to the corresponding portions of the peripheral seal portion in a sandwiched state, and the bag body (10)
In a synthetic resin bag which is easy to open and is provided with a grip piece (17) which is formed by cutting a part corresponding to one side of the peripheral edge seal part of the notch thread (15) and being integrally separable with the grip thread (17). ) Is provided to bulge outward to form the ear portion (37), and the ear portion (37) is cut out to provide the knob piece (17). Bag making. 2. Front and rear walls (11) (12) and front and rear walls (11) (12)
The bottom wall (13) which is interposed between the lower ends of the bottom wall and has both side edges bent downward in a mountain shape is heat-sealed to form a peripheral seal part, and a storage space (14) is formed inside. A cutout thread formed by heat-sealing the bag main body (10) to one side inner surface of the bag main body (10) along the opening line, and heat-sealing both ends to the corresponding portions of the peripheral seal portion in a sandwiched state. (15) and a gripping piece (17) formed by cutting a portion corresponding to one side of the peripheral edge seal portion of the bag body (10) and integrally detachable from one end of the notch thread (15) for easy opening. In the synthetic resin bag, the edge seal part provided with the tab (17) bulges outward to form the ear part (37), and the ear part (3
A synthetic resin bag characterized in that the above-mentioned tab (17) is provided by cutting out 7).