JP2002019805A - Opening/closing structure for commodity packaging bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an opening/closing structure by which a commodity filling work can be facilitated for a commodity packaging bag. SOLUTION: A bag main body is constituted of front and rear films which are arranged across a commodity housing chamber having the opening at the upper section. At the same time, a bag upper section which extends upward exceeding the opening, from the bag main body is provided. Then, from a hinge section which is connected with the bag upper section, a mouth sealing piece which opens/closes the opening is extended to form this commodity packaging bag. In such a commodity packaging bag, by placing the mouth sealing piece under a facing upward posture heading upward from the hinge section, the opening is placed under an opened state. Thus, the commodity-packaging bag is constituted in such a manner that the mouth-sealing piece is separably fixed to the bag upper section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an opening and closing structure for a product packaging bag.

[0002]

2. Description of the Related Art Various types of merchandise packaging bags which can be sold in stores with various small merchandise stored therein have been proposed by the present applicant. Such a product packaging bag constitutes a substantially rectangular bag body having an opening at the top by fusing and welding a front film and a back film made of a synthetic resin film, and a bag upper portion extending upward from one of the front and back films. In addition, a sealing piece for opening and closing the opening is extended from the upper part of the bag.

[0003] The upper portion of the bag generally constitutes a header portion having a hanging hole or constitutes a hanging means formed in a hook shape, so that the product packaging bag can be displayed in a suspended state. .

[0004] Therefore, a merchandise seller who has been supplied with the manufactured merchandise packaging bag loads the merchandise into the bag main body from the opening, and ships after closing the opening with a sealing piece.
The product packaging bags will be displayed on display at retail stores for sale. Normally, the sealing piece is provided with an adhesive tape covered with a release film, and the opening is sealed and closed by the sealing piece by adhering the adhesive tape to the opening edge. The user who purchased the product opens the opening by peeling off the sealing piece against the adhesive tape, and takes out the product from the bag body for use.

[0005]

The conventional product packaging bags are:
In the state where the bag is made, the sealing piece extends from the top of the bag so as to cover the opening, so that the opening is always covered with the sealing piece.

[0006] For this reason, when a product is loaded into a manufactured product packaging bag, it is necessary to once turn up the sealing piece to open the opening. As a result, when loading the product manually, flip up the sealing piece with one finger,
The product must be loaded from the opening with the finger of the other hand, and the product loading operation is extremely complicated. Furthermore, since such a work of lifting the sealing piece is required, it is difficult to automatically load the goods by mechanization.

[0007]

SUMMARY OF THE INVENTION The present invention provides an opening / closing structure for a product packaging bag which solves the above-mentioned problems, and is constituted as a means for sandwiching a product storage room having an opening at an upper portion. A bag body constituted by the front and back films disposed in the bag body, a bag upper portion extending upward from the bag body beyond the opening, and a sealing piece for opening and closing the opening from a hinge connected to the bag upper. In the product packaging bag, the sealing piece is upwardly directed upward from the hinge portion so that the opening is opened, and the sealing piece is separably fixed to the upper part of the bag. On the point.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings.

[First Embodiment] In the first embodiment shown in FIG. 1, a product packaging bag 1 is made up of front and back films 4 and 5 which are arranged across a product storage room 3 having an opening 2 at an upper portion thereof. 6, and a reinforcing sheet 7 is arranged along the inner surface of the back film 5. The front and back films 4 and 5 are made of synthetic resin films, and the reinforcing sheet 7 is made of a relatively thick synthetic paper or synthetic resin sheet. In the case of the illustrated example, the front and back films 4 and 5 are formed by bending a single synthetic resin film into a half-fold shape with the reinforcing sheet 7 interposed therebetween, and the bent portion forms the bottom 8 of the bag body 6. ing. As described below, the front and back films 4 and 5 and the reinforcing sheet 7
A side seal portion formed by fusing and welding is formed along both side edges of the bag body 6, and the front and back films 4 and 5 are welded and integrated in a sandwich shape by the side seal portion with the reinforcing sheet 7 interposed therebetween. Therefore, in the case of the first embodiment, specifically, the product storage room 3 is defined between the front film 4 and the reinforcing sheet 7, and the upper edge of the front film 4 defines the opening edge 2 a of the opening 2.
Are formed.

The reinforcing sheet 7 and the back film 5 form a bag upper portion 9 extending upward from the bag main body 6 beyond the opening 2, and in the illustrated example, the header portion 10 is constituted by the bag upper portion 9. . Specifically, the extended back film 5 is folded at the upper end of the extended portion 7a with respect to the extended portion 7a of the reinforcing sheet 7 to cover the extended portion 7a with the back cover film 5a and the front cover. A film 5b is formed, and both cover films 5a and 5b are welded to the reinforcing sheet 7 in the width direction of the product packaging bag 1. as a result,
The back cover film 5a is extended by the back side welding line to the extension 7a.
Is formed, and the front cover film 5b is welded to the extension portion 7a by the front-side welding wire, and a hinge portion 12 forming an opening / closing fulcrum of a sealing piece described later is formed. In this way, the extension 7a of the reinforcing sheet
And a cover film 5a, 5b covering the header portion, the header portion 10 is formed, and a suspension hole 13 is opened in the header portion 10. As will be described later, since the header portion 10 is simultaneously fused and welded on the same line as the fusion welding (side seal line) along both side edges of the bag body 6, side seal portions are also formed on both side edges of the header portion 10. The cover films 5a and 5b are welded and integrated into a sandwich shape with the extension portion 7a interposed between the side seal portions.

The front cover film 5b is folded back at the hinge portion 12 and is further extended upward. The extension portion forms a sealing piece 14. The sealing piece 14 is for opening and closing the opening 2, and is configured to be rotatable up and down about the hinge 12 as a fulcrum as shown by a chain line in FIG. An adhesive tape 15 is fixed to the opening edge 2a when closed, and the adhesive tape 15 is normally covered with a release film 16.

In the product packaging bag 1 after the bag making, the sealing piece 1
Numeral 4 is held in a state in which the opening 2 is opened as an upward posture folded back from the hinge portion 12, and the sealing piece 14 is fixed to the upper bag portion 9 (header portion 10) in a separable manner. Specifically, the side seal portion is formed by fusing and welding the bag body 6 and the bag upper portion 9 (header portion 10) in a state where the sealing piece 14 is in the upward posture, so that both side edges of the sealing piece 14 are formed. At the same time, the bag upper part 9 (header part 1
0), and at this time, the welding weakening means is provided between the sealing piece 14 and the front cover film 5b so that the sealing piece 14 can be peeled off from the bag upper part 9 (header part 10). Is provided.

Therefore, according to the product packaging bag 1 having the above structure, as shown in FIG.
Is fixedly held on the bag upper part 9 (header part 10) with the sealing piece 14 facing upward, and the opening 2 is opened. For this reason, when loading a product into the product storage room 3, the product can be easily and easily inserted from the opening 2 in the open state. After the product is loaded, the sealing piece 14 is easily peeled off from the bag upper part 9 (header part 10) as shown by a dashed line by pulling the sealing piece 14; By exposing the tape 15 and adhering the sealing piece 14 to the opening edge 2a, the opening 2 is closed by the sealing piece 14 as shown in FIG.

FIG. 2 shows a method for making a product packaging bag according to the first embodiment. In the transfer process, FIG.
As shown in (A), a continuous strip of the reinforcing sheet 7 and a continuous strip of the front and back films 4 and 5 folded in a half-fold manner with the reinforcing sheet 7 interposed therebetween are transported in the strip longitudinal direction. You. In this case, the reinforcing sheet 7 has an extension 7 a extending beyond the front film 4. The back film 5 includes a back cover film 5a extending so as to overlap with the extension 7a of the reinforcing sheet 7, and a front cover film 5b further extending beyond the extension 7a, and a sealing further extended from the front cover film 5b. A piece 14 is integrally provided, and an adhesive tape 15 covered with a release film 16 is provided along an edge of the sealing piece 14.

During the transfer, the front cover film 5b is folded back along the edge of the reinforcing sheet 7, and the front and back cover film 5b is folded.
The extension portion 7a of the reinforcing sheet 7 is covered with the b and 5a, and the sealing piece 14 is overlaid on the front film 4. From this state, as shown in FIG. 2B, both cover films 5b and 5a are welded to the reinforcing sheet 7 in the longitudinal direction of the band.
After forming the header portion 10 (bag upper portion 9) in steps 2 and 11, the suspension holes 13 are opened at predetermined intervals in the longitudinal direction of the band of the header portion 10. As a result, a semi-finished bag product 17 that is continuous in a band shape is formed. As shown, a welding weakening means 18 described later is provided on the surface of the front cover film 5b.

After the bag semi-finished product 17 is formed in this way, as shown in FIG.
2 (hinge portion), the bag is folded back on the front cover film 5b, and the bag semi-finished product 17 is cut off intermittently in this state along the cutting line C in the band width direction. One product packaging bag 1 having the parts 19, 19 is obtained. At this time, since the aforementioned welding weakening means 18 is provided between the front cover film 5b and the sealing piece 14 in the side seal portions 19, 19, the sealing piece 1
Although 4 is welded to the front cover film 5b, its welding force is weakly formed so that it can be easily separated, and the sealing piece 14 is easily peeled off from the front cover film 5b by pulling. The welding weakening means 18 can be made of, for example, printing ink printed on the front cover film 5b or the sealing piece 14 facing the fusing line C. The film forming the front cover film 5b and the sealing piece 14 can be used. It may be constituted by a corona discharge treatment surface applied to the entire surface of itself, that is, the sealing piece 14 is welded to the front cover film 5b at the time of fusing and welding by the side seal, but after the bag making, the sealing piece 14 is pulled. Any means may be used as long as it reduces the welding force to such an extent that it can be easily peeled off from the front cover film 5b.

[Second Embodiment] In a second embodiment shown in FIG. 3, a product packaging bag 1 is a front and back film made of a synthetic resin film disposed across a product storage room 3 having an opening 2 at an upper portion. The bag body 6 is constituted by 4 and 5. In the illustrated example, the front and back films 4 and 5 are formed by bending a single synthetic resin film into a half-fold shape, and the bent portion forms the bottom 8 of the bag body 6. As will be described later, the front and back films 4 and 5 form side seal portions fused and welded along both side edges of the bag body 6, and the front and back films 4 and 5 are welded and integrated by the side seal portions. still,
An opening edge 2 a of the opening 2 is formed by an upper edge of the front film 4.

The back film 5 extends upward from the bag body 6 beyond the opening 2 and forms a bag upper portion 9 provided with a reinforcing sheet 7 made of a relatively thick synthetic paper or synthetic resin sheet. In the illustrated example, the header portion 10 is constituted by the bag upper portion 9. Specifically, the extended back film 5
Is folded at the upper end of the reinforcing sheet 7 to form the back cover film 5a and the front cover film 5b that cover the reinforcing sheet 7 therebetween, and the two cover films 5a, 5b are placed near the lower edge of the reinforcing sheet 7. These are welded to each other. In this way, the header portion 10 is constituted by the reinforcing sheet 7 and the cover films 5a and 5b covering the same, and the suspension holes 13 are opened in the header portion 10. As will be described later, since the header portion 10 is simultaneously fused and welded on the same line as the fusion welding (side seal line) along both side edges of the bag body 6, side seal portions are also formed on both side edges of the header portion 10. The cover films 5a and 5b are welded and integrated in a sandwich manner with the reinforcing sheet 7 interposed between the side seal portions.

A sealing piece 14 made of a separate synthetic resin film is superimposed on the front cover film 5b, and the lower end edge of the sealing piece 14 is placed on the welding 11 or at a position close thereto. The hinge portion 12 is formed by welding to the front cover film 5b. Sealing piece 1
Numeral 4 is for opening and closing the opening 2 and is configured to be rotatable up and down with the hinge 12 as a fulcrum as shown by a chain line in FIG. An adhesive tape 15 is attached to the opening edge 2a when the adhesive tape 15 is provided.

In the product packaging bag 1 after the bag making, the sealing piece 1
4 is a state in which the opening 2 is opened in an upward posture extending upward from the hinge 12 and the sealing piece 1 is opened.
4 is fixed to the bag upper part 9 (header part 10) so as to be separable. As will be described later, the sealing piece 14 is formed by fusing and welding the bag body 6 and the bag upper portion 9 (header portion 10) in a state of being overlapped on the front cover film 5b. Both side edges of the piece 14 are simultaneously welded to both side edges of the bag upper part 9 (header part 10). At this time, the sealing piece 14 is peeled off from the bag upper part 9 (header part 10). Welding weakening means is provided between 14 and the front cover film 5b.

Therefore, as shown in FIG. 3 (A), the product packaging bag 1 after the bag making is fixed and held on the bag upper portion 9 (header portion 10) with the closing piece 14 facing upward, and the opening 2
Is open to the public. For this reason, when loading a product into the product storage room 3, the product can be easily and easily inserted from the opening 2 in the open state. After the product is loaded, the sealing piece 14 is pulled by pulling the sealing piece 14.
Is easily peeled off from the bag upper part 9 (header part 10) as shown by a chain line, so that the adhesive tape 15 is exposed by removing the release film 14, and the sealing piece 14 is adhered to the opening edge 2a. Accordingly, the opening 2 may be closed by the sealing piece 14 as shown in FIG.

FIG. 4 shows a method of making a product packaging bag according to the second embodiment. As shown in FIG. 4A, the front and back films 4 and 5 are formed by bending a continuous strip film into a half-fold shape, and the continuous tape is formed by further bending the extension of the back film 5. Reinforcement sheet 7
A continuous belt-like body in which both front and back cover films 5b and 5a are welded in the longitudinal direction of the belt adjacent to the side edges of the reinforcing sheet 7 is transferred.
Therefore, the front and back cover films 5b and 5a and the reinforcing sheet 7
To form a header portion 10 (bag upper portion 9), and the header portion 10 is provided with hanging holes 13 at predetermined intervals in the longitudinal direction of the band, whereby the semi-finished bag semi-finished product 1 is formed in a band shape.
7 are formed. As shown, a welding weakening means 18 is provided on the surface of the front cover film 5b.

As shown in FIG. 4A, after a continuous tape-shaped sealing piece 14 provided with an adhesive tape 15 covered with a release film 16 along an edge is fed out, a continuous bag semi-finished product is obtained. 17 are merged above the header portion 10 (the bag upper portion 9), and are superposed on the front cover film 5b of the header portion 10. From this state, as shown in FIG. 4B, the side edge of the sealing piece 14 is overlapped and welded to the welded part 11 of the header part 10 (upper part 9 of the bag) to form the hinge part 12, and in this state, When the semi-finished product 17 including the sealing piece 14 is blown along the fusing line C in the band width direction, one product packaging bag 1 having side seal portions 19, 19 formed along both side edges is obtained. At this time, since the aforementioned welding weakening means 18 is provided between the front cover film 5b and the sealing piece 14 in the side seal portions 19, 19, the sealing piece 1
4 is welded to the front cover film 5b, and the welding force is weakly formed so as to be separable.
4 is easily peeled off from the front cover film 5b by being pulled. The welding weakening means 18 may be made of printing ink printed on the front cover film 5b or the sealing piece 14 facing the fusing line C as described in the first embodiment. 5
Alternatively, it may be constituted by a corona discharge treated surface applied to the entire surface of the film itself constituting the sealing piece 14b.

[Third Embodiment] In the third embodiment shown in FIG. 5, a product packaging bag 1 is a front and back film made of a synthetic resin film disposed across a product storage room 3 having an opening 2 at an upper portion. The bag body 6 is constituted by 4 and 5. In the illustrated example, the front and back films 4 and 5 are formed by bending a single synthetic resin film into a half-fold shape, and the bent portion forms the bottom 8 of the bag body 6. As will be described later, the front and back films 4 and 5 form side seal portions fused and welded along both side edges of the bag body 6, and the front and back films 4 and 5 are welded and integrated by the side seal portions. still,
An opening edge 2 a of the opening 2 is formed by an upper edge of the front film 4.

A reinforcing sheet 7 made of a relatively thick synthetic paper or synthetic resin sheet is welded 11 to the upper edge 5c of the back film 5 forming the other opening edge of the opening 2, and the reinforcing sheet 7 is removed. The bag upper part 9 is formed by extending upward from the bag body 6 beyond the opening 2. In addition, in the case of the example of FIG.
Although 0 is configured, it may be configured to form a hook portion having a hook-shaped outline.

A sealing piece 14 made of a separate synthetic resin film is superimposed on the reinforcing sheet 7 located above the opening 2, and the lower edge of the sealing piece 14 is welded to the reinforcing sheet 7. The hinge part 12 is formed. The sealing piece 14 is for opening and closing the opening 2 freely.
As shown by a chain line in FIG. 5 (A), an adhesive tape 15 is provided so as to be rotatable vertically with the hinge 12 as a fulcrum, and is fixed to the opening edge 2a when the opening 2 is closed. The tape 15 is covered with a release film 16.

In the product packaging bag 1 after the bag making, the sealing piece 1
4 is a state in which the opening 2 is opened in an upward posture extending upward from the hinge 12 and the sealing piece 1 is opened.
4 is separably fixed to the reinforcing sheet 7 (upper part 9 of the bag). As will be described later, since the sealing pieces 14 are formed by fusing along the side edges of the bag body 6 in a state of being overlapped on the reinforcing sheet 7, the side edges of the sealing pieces 14 are simultaneously reinforced. The sealing piece 14 is welded to both side edges of the sheet 7 (upper bag 9). At this time, the sealing piece 14 is separated from the reinforcing sheet 7 so that the sealing piece 14 can be peeled off from the reinforcing sheet 7 (upper bag 9). Welding weakening means is provided.

Therefore, as shown in FIG. 5 (A), the product packaging bag 1 after bag making is fixed and held on the reinforcing sheet 7 (bag upper portion 9) with the sealing piece 14 facing upward, and the opening 2
Is open to the public. For this reason, when loading a product into the product storage room 3, the product can be easily and easily inserted from the opening 2 in the open state. After the product is loaded, the sealing piece 14 is pulled by pulling the sealing piece 14.
Is easily peeled off from the reinforcing sheet 7 (upper bag 9) as shown by a chain line, so that the adhesive tape 15 is exposed by removing the release film 14, and the sealing piece 14 is adhered to the opening edge 2a. Therefore, the opening 2 may be closed by the sealing piece 14 as shown in FIG.

FIG. 6 shows a method for making a product packaging bag according to the third embodiment. In the transfer process, FIG.
As shown in (A), a continuous body of front and back films 4 and 5 obtained by folding a continuous strip film into a half-fold shape, and a reinforcing sheet 7.
And a continuous tape-shaped sealing piece 1 provided with an adhesive tape 15 covered with a release film 16 along an edge.
4 is paid out and transferred. As shown, a welding weakening means 18 is provided on the surface of the reinforcing sheet 7.

In this state, the reinforcing sheet 7 and the back film 5
Are overlapped and welded 11. Prior to or after the welding, the suspension holes 13 are opened at predetermined intervals in the longitudinal direction of the reinforcing sheet 7, or the reinforcing sheet 7 is punched and formed into a hook shape.

Welding 1 of the reinforcing sheet 7 and the back film 5
Prior to or after welding, the sealing piece 14 is welded to the reinforcing sheet 7 to form the hinge portion 12.

In this manner, as shown in FIG. 6B, the reinforcing sheet 7 (upper bag 9) is provided on the upper portion of the bag body 6, and the sealing piece 14 is attached to the reinforcing sheet 7 (upper bag 9). The continuous band 17 of the provided semi-finished bag 17 is obtained. Therefore, if the semi-finished product 17 is blown along the fusing line C in the band width direction while intermittently transporting, one product packaging bag 1 having side seal portions 19, 19 formed along both side edges is obtained.
At this time, the above-mentioned welding weakening means 1 is provided between the sealing piece 14 and the reinforcing sheet 7 (upper bag 9) in the side seal portion 19.
8, the sealing piece 14 is provided with the reinforcing sheet 7.
However, the welding force is weak so that it can be easily separated. Therefore, the sealing piece 14 can be easily peeled off from the reinforcing sheet 7 by simply pulling. Incidentally, the welding weakening means 18 may be constituted by printing ink printed on the reinforcing sheet 7 or the sealing piece 14 facing the fusing line C as described in the first embodiment, or It may be constituted by a corona discharge treated surface applied to the entire surface of the film itself.

Of course, the present invention is not limited to the illustrated embodiment.
Is shown on the sealing piece 14, but the adhesive tape 15
May be provided on the opening edge 2a, contrary to the configuration in the illustrated example. As the means for detachably attaching the sealing piece 14 to the upper portion 9 of the bag, various means other than the above-described side seal via the welding weakening means 18 can be adopted.

[0034]

In the conventional product packaging bag, when loading the product into the manufactured product packaging bag, the sealing piece is once turned up to open the opening, and the product is held in a state where the sealing piece is held. According to the present invention, while the product must be inserted into the opening, the sealing piece 14 is in a state in which the opening 2 is opened upward from the hinge portion 12 so that the opening 2 is opened. Since the sealing piece 14 is separably fixed to the upper part 9 of the bag, the product can be inserted into the opening 2 very easily. As a result, in the case of a manual product loading operation, the operation becomes extremely easy. Further, since the operation of rolling up the sealing piece is not required, the product loading operation can be automated by a machine.

After the product is loaded, the sealing piece 14 is easily peeled off from the bag upper portion 9 by pulling.
The opening 2 can be suitably sealed as in the conventional case.

[Brief description of the drawings]

1A and 1B show a first embodiment of the present invention, in which FIG. 1A is a cross-sectional view showing a state after bag making, and FIG. 1B shows a state in which an opening is sealed by a sealing piece peeled off from the bag upper part. It is sectional drawing.

2A and 2B show a manufacturing method of the first embodiment, wherein FIG. 2A is a perspective view showing a transfer step, FIG. 2B is a perspective view showing a semi-finished bag,
(C) is a perspective view showing a side sealing step.

3A and 3B show a second embodiment of the present invention, in which FIG. 3A is a cross-sectional view showing a state after bag making, and FIG. 3B is a view showing a state in which the opening is sealed by a sealing piece peeled off from the top of the bag. It is sectional drawing.

4A and 4B show a manufacturing method according to a second embodiment, wherein FIG. 4A is a perspective view showing a semi-finished bag, and FIG. 4B is a perspective view showing a side sealing step.

5A and 5B show a third embodiment of the present invention, in which FIG. 5A is a cross-sectional view showing a state after bag making, and FIG. 5B shows a state in which the opening is sealed by a sealing piece peeled off from the top of the bag. It is sectional drawing.

6A and 6B show a manufacturing method according to a third embodiment, in which FIG. 6A is a perspective view showing a transfer step, and FIG. 6B is a perspective view showing a side sealing step of a semi-finished bag.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Product packaging bag 2 Opening 3 Product storage room 4 Front film 5 Back film 6 Bag body 7 Reinforcement sheet 9 Bag upper part 12 Hinge part 14 Sealing piece 15 Adhesive tape

Claims (1)

[Claims] 1. A bag body is constituted by a front and back film disposed across a product storage chamber having an opening at an upper portion, and a bag upper portion extending upward from the bag body beyond the opening is provided. In a product packaging bag in which a sealing piece for opening and closing the opening is extended from a hinge connected to the upper part, the opening is opened with the sealing piece facing upward from the hinge. An opening / closing structure for a product packaging bag, wherein the sealing piece is fixed to an upper part of the bag so as to be separable.