JP2002145285A - Bag body with fastener made of synthetic resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily fold a side of an opening of a bag body without reducing the amount of contents filled into the bag body relative to the size of the bag body, and to improve the bonding strength of the upper edge of a lateral gusset. SOLUTION: In the bag body with a fastener made of a synthetic resin, a lateral gusset 4 which is folded into between the opposed sides 5 of a front and rear body films 1a, 1b, in a V-shaped form is fixed to the inner side surface of one of the films 1a, 1b, in such a manner that the upper edge 4b of the gusset 4 is located below a fastener 3 and bonded to the inner side surface of the film by means of a seal tape 8. A spaced part B1 is formed between a fastener tooth bonding part 9 on one of the opposite ends of the fastener 3 and a bonding part of one of the opposite ends of the tape 8, both the parts being properly spaced apart, thereby allowing the opening 2 of the bag body to be easily folded. By forming the spaced part B1, the length and thickness of the tape 8 can be adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag with a synthetic resin chuck having a male / female occlusal type chuck in an opening and bonded to a V-shaped horizontal gusset on both sides. .

[0002]

2. Description of the Related Art As shown in FIG. 5, a bag 1 made of two body films 1a and 1b having a heat-adhesive resin layer on the inner surface.
A male / female occlusal type chuck 3 is provided inside the opening 2 of the bag body 1, and on both sides 5 of the bag body 1, a resin film having an inner surface having thermal adhesion with the inner surfaces of the body films 1 a and 1 b, A lateral gusset 4 folded in a V-shape with the outer side face inward is adhered so that its upper edge 4b is positioned below the chuck 3 in length, and the upper edge 4b of the lateral gusset 4 is The body films 1a, 1b are brought closer to the inner surface of one of the two body films 1a, 1b.
A bag with a synthetic resin chuck attached to the inner surface and the inner surface of the horizontal gusset 4 with a sealing tape 8 having thermal adhesiveness 4c is known from JP-A-8-34450. FIG.
4a is a folding ridge line of the horizontal gusset 4, 4d
Denotes oblique bonding, 6 denotes a scheduled tear line provided in the opening 2 in parallel with the chuck 3, and 7 denotes an opening notch engraved on both sides of the opening 2 so as to correspond to the scheduled tear line 6.

[0003]

In the case of this type of bag, for example, in the distribution and transportation from a manufacturing plant for food and the like to a store or the like, a number of bags filled with the contents at the manufacturing plant are packed in a cardboard box. ing. The contents to be filled in the bag are accommodated in the contents accommodating portion from below to the bottom of the chuck 3, and the opening 2 side above the chuck 3 is extended from the contents accommodating portion filled with the contents. It is a form that embodies the shape. When a bag of such a form is packed in a cardboard box as it is, a space for accommodating the protruding portion is required in the cardboard box, which is wasted space, and the number of bags to be stored is limited. At the same time, the bag enters an unstable boxed state.

Therefore, in order to avoid such a problem, the extended protruding portion is bent toward the content accommodating portion and packed in a box, but there is a problem that this bending cannot be easily obtained. The reason for this is that, as shown in FIG. 5, the conventional bag of this type has the sealing tape 8 closely adhered to the chuck 3 at a very small interval where it is almost in contact with the chuck 3. Since a highly rigid portion is formed by the chuck nail crushing adhesive portions on both sides or the adhesive portions on both sides of the chuck 3 and the adhesive portions on both sides of the seal tape 8, the strong rigid portion acts as an elastic restoring force against bending, and is bent. Hinders the ease of use. For this reason, at present, a portion where no filler is present is formed on the content storage side except for the portion where the elastic restoring force acts relatively strongly, and this portion is folded and packed in a box.
Therefore, it is necessary to prepare a bag having a size larger than the filling amount, which increases the cost spent on the bag. Then, when displayed at a store or the like, the content is less filled than the size of the bag, giving a poor feeling. As means for solving this problem, for example, means for shortening the length of the seal tape (vertical direction with respect to the horizontal width direction of the seal tape) or reducing the layer thickness of the seal tape can be considered. However, in this portion, there is a problem that the tensile stress concentrates on the bonding 4c of the upper edge 4b of the horizontal gusset 4 due to the swelling phenomenon of the body films 1a and 1b due to the filling in the bag body, and the bonding 4c peels and breaks. It is necessary to increase the length of the sealing tape or to increase the thickness of the sealing tape so as to strengthen the sealing tape.

SUMMARY OF THE INVENTION It is an object of the present invention to make it easy to bend the opening side of the bag body without reducing the amount of the filling as compared with the size of the bag body, and to improve the adhesive strength to the upper edge of the horizontal gusset. It has improved.

[0006]

According to a first aspect of the present invention, there is provided a bag for a front and back body film having a heat-adhesive resin layer on its inner surface. Male and female occlusal type chucks are provided inside the opening, and on both sides of the bag body, a resin film whose inner surface is thermally adhesive to the inner surface of the body film, and V
The lateral gusset folded in the shape of a letter is adhered so that the upper edge of the lateral gusset is located below the chuck, and the upper edge of the lateral gusset is formed in one of the two front and back body films. In a bag with a synthetic resin zipper adhered to a side surface with an inner side surface of the body film and an inner side surface of the horizontal gusset with a seal tape having thermal adhesiveness, a zipper crushing adhesive portion on both sides of the zipper or the zipper A separation portion is formed by appropriately providing a space between the adhesive portions on both sides and the adhesive portions on both sides of the seal tape.

According to a second aspect of the present invention, a male / male occlusal type chuck is provided inside the opening of the bag body of the two body films having a heat-adhesive resin layer on the inner surface. On both sides, the inner surface is a resin film having thermal adhesion to the inner surface of the body film, and the outer surface is inward.
The lateral gusset folded in the shape of a letter is adhered so that the upper edge of the lateral gusset is located below the chuck, and the upper edge of the lateral gusset is formed in one of the two front and back body films. To the side, in the bag body with a synthetic resin zipper bonded to the inner side surface of the body film and the inner side surface of the horizontal gusset with a seal tape having thermal adhesiveness, the both sides of the zipper in the both-side adhesive portion of the seal tape A concave notch portion is formed on the chuck claw crushing adhesive portion or on a side facing the bonding portion on both sides of the chuck, and the concave portion is provided with the chuck claw crushing bonding portion on both sides of the chuck or the bonding portion on both chuck sides and the seal. It is characterized in that a separation portion is formed with an appropriate gap between both side adhesive portions of the tape.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention, in which 1 is a bag formed of two films, a front body film 1a and a back body film 1b, 2 is an opening, Is a male / male occlusal type chuck provided along the opening 2;
Opening notches are engraved on both sides (or one side) of the opening 2 so as to correspond to the planned tear line 6 drawn parallel to the chuck 3 above the chuck 3.

Reference numeral 4 denotes a horizontal gusset obtained by folding a film into a V-shape, and is bonded to both sides 5 of the bag 1. The horizontal gusset 4 has a folding ridge line 4a parallel to a line of the side 5 of the bag body 1 and an upper edge 4b of the horizontal gusset 4 having a length positioned below the chuck 3 and has a length dimension. The upper edge 4b is adhered 4c only to the inner surface on the front body film 1a side with a seal tape 8. It should be noted that the film may be adhered only to the back body film 1b. In short, it means that the film is adhered to only one of the front and back body films 1a and 1b.

A lateral gusset film, which is in contact with the front body film 1a on the side to which the upper edge 4b of the horizontal gusset 4 is bonded, is moved from the upper edge 4b of the horizontal gusset 4 to both sides 5 of the bag body 1.
4d may be bonded obliquely to the front body film 1a.

The both sides of the chuck 3 in the first embodiment are formed by a chuck nail crushing adhesive portion 9 which crushes the male and female bite claws of the chuck 3 when sealing the both sides 5. Thus, the first embodiment of the present invention has a structure in which a separation portion B1 is formed with an appropriate space between the chuck claw crushing adhesive portions 9 on both sides of the chuck 3 and the bonding portions on both sides of the seal tape 8.

A first embodiment of the present invention having the above structure is as follows.
The chuck nail crushing adhesive portions 9 on both sides of the chuck 3 and the sealing tape 8 are formed by a separation portion B1 formed with an appropriate space between the chuck nail crushing adhesive portions 9 on both sides of the chuck 3 and the both-side adhesive portions of the seal tape 8. The thickness of the adhesive layer of only the two front and back body films 1a and 1b is increased on both sides 5 between the adhesive portions on both sides of the chuck 3, and the chuck claw adhesive portions 9 on both sides of the chuck 3
The two sides 5 between the adhesive portions on both sides of the seal tape 8 are flexible, and even if they are bent, no or little bending force acts on the chuck claw crushing adhesive portion 9 and the seal tape 8.
Therefore, the opening 2 can be easily bent at the separation portion B1 without reducing the filling amount of the contents as compared with the size of the bag body 1.

[0013]

FIG. 2 shows a second embodiment of the present invention. The basic structure of the second embodiment is the same as that of the first embodiment. In the second embodiment, a concave notch 10 is formed on both sides of the seal tape 8 on opposite sides of the chuck claw crush adhesive 9 on both sides of the chuck 3, and the chuck 3 is formed by the concave notch 10. Chuck nail crushing adhesive portions 9 on both sides Separating portions B2 are formed with an appropriate space between the adhesive portions on both sides of the seal tape 8.

In the second embodiment, the separation portion B
It is significant that the gap B20 between the chuck 3 and the seal tape 8 is not so much separated, that is, the position of the upper edge 4b of the horizontal gusset 4 is not so much below the bag body. Therefore, the gusset portion is prevented from being reduced, and the same effect as that of the first embodiment is obtained without causing a decrease in the content filling amount.

[0015]

Third Embodiment FIG. 4 shows a third embodiment of the present invention, the basic structure of which is the same as that of the first embodiment. In the chuck 3 of the third embodiment, male and female bite claws are formed on a chuck tape 3a. Therefore, the adhesive portions 11 on both sides of the chuck 3 are substantially equal in width to the chuck tape 3a having an area larger than that of the chuck nail crushing adhesive portion 9.

The third embodiment has a structure in which a separation portion B3 is formed at an appropriate interval between the bonding portions 11 on both sides of the chuck 3 and the bonding portions on both sides of the seal tape 8. still,
Also in the third embodiment, as in the second embodiment, a concave notch 10 is formed on both sides of the seal tape 8 on the side opposite to the adhesive 11 on both sides of the chuck 3.
Depending on the method, a method may be selected in which a space is formed between the adhesive portions 11 on both sides of the chuck 3 and the adhesive portions on both sides of the seal tape 8 with an appropriate space.

In the structure of the third embodiment, as in the first and second embodiments, even if the opening 2 is bent, the bonding portion 11 and the seal tape 8 on both sides of the chuck 3 have no or almost no bending force. No action is taken, and the opening 2 side can be easily bent without reducing the filling amount of the contents compared to the size of the bag 1.

In the first to third embodiments, the separation portions B1, B
The appropriate interval between B2 and B3 is such a length that the bending of the opening 2 side can be easily obtained between the chuck nail crushing bonding portion 9 on both sides of the chuck 3 or the bonding portion 11 on both sides of the chuck and the bonding portion on both sides of the seal tape 8. .

According to the present invention, in any of the first to third embodiments, the bending of the opening 2 side is performed by the chuck claw bonding portions 9 on both sides of the chuck 3 or the bonding portions 11 on both sides of the chuck 3.
And both sides of the sealing tape 8 or diagonal bonding 4d
Since the portion does not affect the horizontal gusset, the length of the sealing tape 8 (vertical direction with respect to the horizontal width direction of the sealing tape) is increased, and the layer thickness of the sealing tape 8 is increased. The bonding 4c portion of the upper edge 4b of the fourth member 4 can be strengthened. Therefore, it is also possible to enhance the strength of the portion to the same level as the sealing strength of the bag body. The reinforcement is achieved by increasing the thickness to the same thickness as the body films 1a and 1b, or increasing the thickness of the heat-adhesive resin layer of the seal tape 8.

By appropriately increasing or increasing the length of the sealing tape 8, the bonding strength of the bonding 4c of the upper edge 4b of the horizontal gusset 4 is improved, and the body film 1a, Even if tensile stress concentrates on the bonding 4c of the upper end edge 4b of the horizontal gusset 4 due to the bulging phenomenon 1b, peeling and breaking of the bonding 4c is prevented.

[0021]

As described above, according to the present invention, it is possible to easily bend the opening side of the bag body, so that the bag body can be compactly stored in a cardboard box and a larger number of boxes can be packed. Becomes In addition, the opening of the bag can be easily bent without reducing the filling amount of the contents compared to the size of the bag, so that the appearance as a product is improved and the cost spent on the bag is improved. Can be reduced. Further, the improvement of the adhesive strength to the upper edge of the horizontal gusset prevents the bag from being broken, thereby providing a bag with high packaging reliability.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of a first embodiment of a bag according to the present invention.

FIG. 2 is a partially cutaway front view of a second embodiment of the bag of the present invention.

FIG. 3 is a perspective view of a bag according to a second embodiment in an inflated state.

FIG. 4 is a partially cutaway front view of a third embodiment of the bag according to the present invention.

FIG. 5 is a partially cutaway front view of a conventional bag body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bag body 1a Front body film 1b Back body film 2 Opening 3 Chuck 3a Chuck tape 4 Lateral gusset 4a Ridge line 4b Upper edge 4c Adhesion 4d Diagonal adhesion 8 Seal tape 9 Chuck crushing adhesion part 10 Depressed part 11 Chuck Adhesive parts on both sides B1 Separator B2 Separator B3 Separator

Claims (2)

[Claims] A male / female occlusal type chuck is provided inside an opening of a bag body of two front and back body films having a heat-adhesive resin layer on the inner surface, and inner surfaces are provided on both sides of the bag body. Adhering a horizontal gusset folded in a V-shape with an outer surface inside with a resin film having thermal adhesiveness to the inner surface of the body film with a length dimension such that the upper edge is located below the chuck. And, the upper edge of this horizontal gusset is brought closer to either one of the inner surfaces of the front and back two body films,
In the bag body with a synthetic resin zipper bonded to the inner side surface of the body film and the inner side surface of the horizontal gusset with a seal tape having thermal adhesiveness, the zipper crushing bonding portion on both sides of the chuck or the bonding portion on both sides of the chuck. A bag with a synthetic resin zipper, wherein a separating portion is formed with an appropriate gap between both side adhesive portions of the seal tape. 2. A male / female occlusal type chuck is provided inside an opening of a bag body of two front and back body films having a heat-adhesive resin layer on an inner surface, and inner surfaces are provided on both sides of the bag body. Adhering a horizontal gusset folded in a V-shape with an outer surface inside with a resin film having thermal adhesiveness to the inner surface of the body film with a length dimension such that the upper edge is located below the chuck. And, the upper edge of this horizontal gusset is brought closer to either one of the inner surfaces of the front and back two body films,
In a bag with a synthetic resin zipper bonded to the inner side surface of the body film and the inner side surface of the horizontal gusset with a seal tape having thermal adhesiveness, a zipper crushing bonding portion on both sides of the chuck in a bonding portion on both sides of the sealing tape. Alternatively, a concave notch portion is formed on the side opposite to the adhesive portion on both sides of the chuck, and the chuck notch adhesive portion on both sides of the chuck or the adhesive portion on both sides of the chuck and the both-side adhesive portion of the seal tape by the concave notch portion. A bag with a synthetic resin chuck, wherein a separation portion is formed with an appropriate interval therebetween.