JP2523072B2 - Manufacturing method of bag-like sheet for filing - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a filing bag-like sheet for organizing and storing office documents, photographs and the like.

[0002]

2. Description of the Related Art Various types of filing bag-like sheets of this type have been proposed. For example, a bag having a top opening made of a transparent film and having a backing paper inserted therein is generally used. In this conventional example, a plurality of holes are formed in one side edge of the bag, and the holes are used by binding the holes to a known binder.

However, in the above-mentioned conventional example, there is an inconvenience that the backing sheet floats in the bag, and there is a inconvenience that two steps of inserting the backing sheet into the bag after manufacturing the bag are required in manufacturing.

Therefore, the present inventor has already provided a bag-shaped sheet for filing in which a bag-shaped film and a core material inserted therein are integrated, and therefore, the Japanese Patent Publication No. 1-36798 (Japanese Patent Application No. 58-58535) has already been used. ) Has just proposed a manufacturing method thereof.

Further, according to the above-mentioned manufacturing method, the continuously fed tubular film is cut along its diameter, and a pair of band-shaped films half-folded into a U-shaped cross section are cut by this cutting. Separated so that there is a predetermined interval,
Then, insert a continuous long sheet-shaped core material from the space where the film cutting edge is expanded between a pair of films,
A desired filing bag-shaped sheet can be provided by fusing and welding the core material set in this manner and a pair of films covering the core material.

[0006]

In the above-mentioned method for producing a bag-shaped sheet for filing, since the tubular film is used as the material, the cost of the material is high,
As a result, there is a limit to the cost reduction of manufactured products.

Further, as described above, since a pair of U-shaped cross-section films obtained after cutting the tubular film must be separated and the sheet-shaped core material must be inserted from the expanded space, when the thin film is separated, There is a risk that it may be stretched to cause wrinkles and that it is easily damaged.

[0008]

Means for Solving the Problems The present invention solves the above problems and uses a commonly used low-cost strip-shaped film as a raw material, and further, in the production line, the film may be stretched or damaged, and other manufacturing errors may be caused. The present invention provides a method for producing a bag-like sheet for filing that can be prevented as far as possible, and the means configured is that a film that symmetrically covers the sheet-shaped core material is provided on both the front and back sides of the core material to the left and right. a method of producing a filing bag-like sheet forming the bag portion which is open to and facing pairs: a feeding step of paying out in two rows of parallel strip-shaped long film consecutive; strip of said two rows Spacing the films from each other
On the wide flat plate part of the guide device that has S and can be placed
Then, a long sheet-shaped core material is drawn out between the flat plate portion and the strip-shaped film and straddling the two rows of strip-shaped films, and both side edges of the sheet-shaped core material are width center lines of the strip-shaped films. The core material polymerization process to be placed in the vicinity of the guide device ;
Following the flat plate portion, the width gradually decreases from the guide portion.
Folding plan that has approximately the same width as the sheet-shaped core material following the guide part
By arranging the strip-shaped film inside,
A bending step of bending the core material with a pair of half-folded films by bending the cross-section into a substantially U shape so as to hold the side edge of the core material without changing the spacing S ; And a separation step of fusing and welding a pair of films covering the core material in the width direction at a predetermined interval in the longitudinal direction.

[0009]

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

(First Embodiment) A first embodiment of the present invention is shown in FIG.
Through FIG.

In FIGS. 1 and 2, a roll 1 is a roll of a band-shaped synthetic resin film, and a long band-shaped film 2 continuously fed from the roll 1 is transparent or translucent.

On the other hand, the roll 3 is a wound body of a synthetic resin sheet slightly thicker than the above film, and a long sheet continuously fed from the roll 3 serves as a sheet-shaped core material 4 described later. And is preferably colored yellow or the like.

The film 2 and the core material 4 are made of similar synthetic resin materials, and can be suitably welded to each other by heat.

The film 2 fed from the roll 1
Is roughly bisected in the width direction by a cutting device 5 such as a slitter, and has two rows of bag forming films 2a, 2a parallel to the left and right.
b is fed and conveyed (feeding step), the guide device 6
Is guided to the flat plate portion 7. At this time, the two rows of bag forming films 2a and 2b cut and separated by the cutting device 5 have a space S between each other, and therefore the slitter constituting the cutting device 5 has a blade having a V-shaped cross section. It is preferable to have.

The sheet-shaped core material 4 fed from the roll 3 is formed to have a width dimension of about half of the film 2, and extends over the two rows of bag-forming films 2a and 2b and the film 2a. 2b and the guide device 6 so as to be interposed therebetween, and both side edges of the sheet-shaped core material 4 are arranged near the width center lines of the films 2a and 2b (core material polymerization step).

The guide device 6 has a guide portion 8 having a width gradually reduced following the flat plate portion 7.
Then, a bending guide portion 9 having substantially the same width as the sheet-shaped core material 4 is provided.

Therefore, as shown in FIG.
Two lines of bag forming film 2 in the core material polymerization process
a and 2b are placed on a wide flat plate portion 7 with a space S between them.
Between the flat plate portion 7 and the films 2a and 2b
The sheet-shaped core material 4 is fed toward
Both side edges of the film 2a, 2b are approximately along the width center line of each film
Be placed. At this time, as shown in FIG. 2 and FIG.
The outer edges of the films 2a, 2b on both sides of the flat plate portion 7.
If it is configured so that it can generally follow the side edge, the space S
It will be determined dynamically. On the other hand, sheet-shaped core material
Since 4 is almost the same width as the bending guide portion 9, it is naturally flat.
The position on the plate portion 7 is determined. In this way, the guide
On the flat plate portion 7 of the table 6, two rows of films 2a and 2b are provided.
The spacing S between the two and the positions of the films 2a, 2b and the core material 4
Since the decision is made, after that, such interval setting and position
It suffices if the work can be performed mechanically without changing the arrangement.
Yes. Then, as shown in FIG. 3 (B), subsequently, the two rows of bag-forming films 2a, 2b are on the side of the sheet-shaped core material 4 in the process of reaching the folding guide portion 9 through the guide portion 8. The sheet-shaped core material 4 is covered with a pair of semi-folded films 2a and 2b which are bent into a substantially U-shaped cross section so as to hold the edges (a bending step). Work during this
Is performed without changing the spacing S of the film.
With the sheet-shaped core material 4, the symmetrical bag parts on both sides are accurate.
Formed.

Therefore, as shown in FIG. 3 (C), the sheet-shaped core material 4 is located at the center in a state where the guide device 6 is passed through, and the front and back surfaces of the sheet-shaped core material 4 are paired to the left and right. And bag-forming films 2a, 2 having a substantially U-shaped cross section
b is arranged. That is, the sheet-shaped core material 4 is covered with the bag forming films 2a and 2b on the left and right, and is located above and below the widthwise central portion of the sheet-shaped core material 4,
The bag forming films 2a and 2b have a space S between them.

For this purpose, a guide roller 10 for holding the films 2a and 2b in a bent state is provided below the guide device 6. Further, conveyance drive rollers 11 and 11 are provided at the subsequent position of the guide device 6 so that the sheet-shaped core material 4 covered with the films 2a and 2b can be continuously conveyed and a step difference for enabling intermittent feeding. It is conveyed to the sealing device 13 via the roller 12.

In the sealing device 13, the long materials of the films 2a and 2b and the core material 4 are welded and welded in the width direction at predetermined intervals in the longitudinal direction by the fusing blades 14 at the time of intermittent feeding and intermittent stop. The filing bag-shaped sheets 15 formed by the above are sequentially stacked on the mounting table 16.

As shown in FIG. 3 (D), the filing bag-shaped sheet 15 thus manufactured is covered with half-folded films 2a and 2b on both left and right sides of the center line of the core material 4, The film consists of a core material 4 and a bag-like sheet 1
The upper and lower edges 17, 17 of the No. 5 are welded. Therefore, by this film, on both front and back surfaces of the core material 4, the bag portions 18 forming a pair on the left and right and opening facing each other,
18 is formed, and the opening edges 19, 19 are arranged at intervals corresponding to the above-mentioned interval S. In the present invention,
It is possible to provide partition seals 20 and 20 on the bag portions 18 and 18, and in this case, if a welding blade 21 for partition seal is provided in front of the fusing blade 14 as shown in FIG. good. If such partition seals 20, 20 are provided, a plurality of vertically divided pouch portions can be formed in the bag portion 18.

The filing bag-like sheet 15 manufactured as described above is bound and welded 22 by a sealing means such as an ultrasonic seal along the center line in a state where a large number of sheets are laminated, and a cover 23 is used for binding. Then, the product of the file book 24 as shown in FIG.

(Second Embodiment) FIG. 4 shows a second embodiment of the present invention.

In this second embodiment, two parallel rows of bag forming films 2a and 2b are fed from independent rolls 1a and 1b, respectively, and are separated from each other by a space between both rolls 1a and 1b and between both films 2a and 2b. S is provided. Therefore,
The cutting device 5 as described in the first embodiment is unnecessary. Other configurations are similar to those of the first embodiment.

By the way, as described above, the respective rolls 1a,
According to the configuration in which the film 1a is provided, when the films 2a and 2b are unwound and conveyed between the rolls 1a and 1b and the conveyance driving roller 11, it becomes difficult to keep the tension of both films 2a and 2b uniform. The rolls have different winding tensions depending on the conditions under which they are formed as a wound body, which causes the tensions to differ from each other at the time of feeding. Further, when the rolls 1a and 1b having different winding amounts (roller diameters) are used, the tensions naturally differ from each other because the peripheral speeds at the feeding portion are different. When the pair of films 2a and 2b have different tensions from each other, the left and right bag portions 18 and 18 cannot be balanced when the filing bag-shaped sheet 15 is completely manufactured, which may result in poor finish. There is

Therefore, in the second embodiment of the present invention, the tension control roller 25 is provided for the purpose of equalizing the tension of the pair of films 2a and 2b fed from the pair of rolls 1a and 1b. . That is, although not shown in the figure, a sensor that detects the tension of the pair of films 2a and 2b and two tension signals detected by the sensor are compared by a comparison circuit or the like, and if the tensions are different, it is determined. There is provided an automatic tension controller means comprising a microcomputer which issues a control signal and an actuator which controls the tension control roller 25 by the control signal so that the following two tension signals are equalized. Therefore, the tension control roller 25 is accelerated or decelerated to equalize the tensions of the pair of films 2a and 2b.

[0027]

EFFECTS OF THE INVENTION According to the present invention, a generally used low-cost strip-shaped film is used as a raw material without using a tubular film unlike the filing bag-shaped sheet manufacturing method previously proposed by the present inventor. Therefore, the manufacturing cost of the product can be reduced as much as possible. Moreover, since it is not necessary to separate the film in the production line, it is possible to prevent undesired stretching and damage of the film as much as possible, and it is possible to provide a filing bag-shaped sheet excellent in finish. In particular, according to the invention, it is not a tubular film
A bag-shaped sheet for filing using a band-shaped film as a material
Two rows of strip-shaped film and sheet-shaped core material
Since it is placed on the wide flat part of the guide device,
On the flat plate portion, setting the space S between the two rows of film and
The heart-shaped core material can be positioned. That is, Phil
Since the strips are placed on the flat plate part in the form of strips, the spacing S can be easily set.
Can be set. Also, the bending guide part of the guide device is a sheet-shaped core.
Since the width is almost the same as the core material, place the sheet-shaped core material on the flat plate
Can be easily installed in a fixed position. And in this way the flat plate part
Interval S and positioning status set above are changed afterwards
Do not continue to use the guide and bending guide to
The sheet-shaped core material is used because the film is folded in half.
It is possible to accurately form symmetrical bag parts on both sides of the
It has an excellent effect that it can be done.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing the overall steps of a method according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a main part of the method according to the first embodiment of the present invention.

FIG. 3 shows each step in the first embodiment of the present invention,
(A) is a sectional view showing a polymerization step, (B) is a sectional view showing a bending step, (C) is a sectional view showing a film and a core material after the bending step is completed, and (D) is for filing after manufacturing. It is a perspective view showing a bag-like sheet and a file book using the same.

FIG. 4 is a perspective view showing an essential part of a method according to a second embodiment of the present invention.

[Explanation of symbols]

 1 roll 1a roll 1b roll 2 film 2a bag forming film 2b bag forming film 3 roll 4 core 6 guide device 7 flat plate part 8 guide part 9 bending guide part 11 transport drive roller 13 sealing device 14 fusing blade 15 filing bag Sheet 18 bag 19 opening edge

Claims (1)

(57) [Claims] 1. A method for producing a bag-like sheet for filing, which comprises a bag-shaped sheet which covers the sheet-shaped core material in a bilaterally symmetrical manner, and has bag portions which are paired on the left and right sides of the core material and which are open facing each other. : feeding process and unwinding in two rows of parallel strip-shaped long film consecutive; strip of said two rows
Guide device for placing films with a space S between them
Between the flat plate portion and the strip film on the wide flat plate portion of the table.
A core polymerization step and that allowed to place a sheet-like core of elongated straddling filmstrip of the two rows feed, both side edges of the sheet-like core in the vicinity of the width center line of each strip-like film towards; Guide Following the flat part of the device, gradually reduce the width
From the guide part to the guide part
By arranging along the bending guide part that has the same width, each band shape
The film is attached to the side edge of the core without changing the distance S.
A step of bending the core material with a pair of half-folded films that are folded into a U-shaped cross section so as to hold them; and a predetermined interval in the longitudinal direction between the core material and the pair of films covering the core material. And a separation step of fusing and welding in the width direction, and a method for producing a bag-shaped sheet for filing.