JPH0631834A - Bag-making method - Google Patents

Abstract

PURPOSE:To shorten the adjusting time of feeding part by a method wherein upside sheet material and underside sheet material are carried by the respective widthwise middle parts. CONSTITUTION:At a carrying section, endless belt 39 is driven under the condition that each feeding pin 40 engages with feeding holes 19a and 30a provided respectively on lower and upper paper stocks 19 and 30. Paste 13a is applied to both the side parts of the stock from paste coating nozzles 27 and, further the paste 13a is coated to the widthwise of the lower paper stock 19 in the intervals (s) of unit bag with a coating roller 29. Thus, both the paper stocks 19a and 30 can be stably and surely carried. Further, even when both the side parts in the carrying direction of the lower paper stock 19 are shaped so as to be folded on the chevron form, no positional lines of the feeding holes 19a before and after shaping changes. Accordingly, the conventional width adjusting work becomes unnecessary and the adjusting work time is remarkably shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an envelope used for shipping documents, developing (developing) and printing (printing).
The present invention relates to a method of manufacturing a bag such as a DP envelope that stores a toned photograph or the like.

[0002]

2. Description of the Related Art For example, as a storage bag such as a DP envelope, the one shown in FIG. 11 is known. This storage bag 1
Is composed of an upper paper 2 and a lower paper 3, both papers are superposed, and three sides thereof are joined by a bonding agent such as an adhesive. However, the storage bag 1 has a small storage amount. Then, the storage bag 4 shown in FIG. 12 was devised. This storage bag 4
Is composed of an upper paper 5 and a lower paper 6, both of which are superposed on each other and three sides of which are bonded with an adhesive. It means that the character portion 7 of “” is provided. With such a structure, the storage amount can be greatly increased.

[0003]

By the way, in manufacturing the storage bag 4 shown in FIG. 12, for example, as shown in FIG. 13, the continuous upper paper material 8 shown in FIG. A plurality of feed holes 8a, 9a are provided along each edge of the lower paper material 9 shown in (B), and a pair of feed devices (not shown) provided corresponding to each edge respectively have feeds. It is conceivable that the pins are successively engaged with the feed holes, so that both materials are continuously conveyed. However, in this case, especially for the lower sheet, the pair of opposite sides is
Before and after the bending and shaping into the shape of, the positional distance between the feed holes in the width direction is u as shown in FIG.
From 1 to u2 as shown in FIG. Therefore, when arranging a plurality of pairs of feeders in the transport direction, it is necessary to change the interval between the feeders forming the pair according to u1 or u2 for each arrangement position, and it takes a lot of time to adjust them. Was spent.

An object of the present invention is to provide a bag manufacturing method capable of shortening the adjustment time of the feeding section.

[0005]

The present invention provides a bag manufacturing method for manufacturing a bag by conveying an upper sheet material and a lower sheet material in a continuous manner, and stacking and joining both sheet materials. It is characterized in that the upper sheet material and the lower sheet material are conveyed with reference to the center portion in the width direction.

[0006]

The position of the central portion in the width direction does not change even if the edges of the sheet material are bent and shaped during conveyance. Therefore, according to the present invention, since the upper sheet material and the lower sheet material are conveyed with reference to the widthwise central portion of both sheet materials, the feeding device having the same configuration is used at any position in the conveying direction. It becomes possible.

[0007]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view of a bag manufacturing apparatus which is a first embodiment in which the present invention is applied to manufacture the storage bag 4 shown in FIG. 12, and FIG. 2 is a plan view of a lower paper material used in FIG. FIG. 3 shows FIG.
4 is a plan view of the top paper material used in FIG. 4, FIG. 4 is a schematic view of the gluing part used in FIG. 1, and FIG. 5 is a state change diagram of the material in FIG. The bag manufacturing apparatus 10 shown here includes a lower paper supply unit 11, a shaping unit 12, a gluing unit 13, an upper paper supply unit 14,
It has a joining part 15, a cutting part 16, a discharging part 17, and a carrying part 18 in order.

The lower paper supply unit 11 is used for the lower paper material 1 shown in FIG.
9 is continuously supplied. The lower paper material 19 has a feed hole 19a formed in the center portion in the width direction along the conveying direction, and further has a semicircular shape in the center portion in the width direction at unit bag intervals (intervals s shown in FIG. 12). A punching hole 19b is provided. Further, on the back surface, predetermined items (in the case of a DP envelope, a photo maker name, advertising phrases, etc.) are printed for each unit bag interval. The lower paper supply unit 11 includes a roll 21 around which the lower paper material 19 is wound and driven to rotate by a drive motor 20, and rolls based on a detection signal from a position detector (not shown) provided on the tension arm 22. 21 is driven to rotate, and the lower paper material 19 is continuously fed to the conveying line.

The shaping unit 12 is a lower paper material 1 supplied from the lower paper supply unit 11 by a shaping machine 23 called a former.
Both sides of the sheet 9 in the transport direction are continuously bent and shaped into a V shape.

As shown in FIG. 4, the gluing section 13 includes a first coating device 24 for coating the shaped lower paper material 19 with the glue 13a on both sides along the conveying direction, and a unit bag. A second coating device 25 for coating the glue 13a on the portion corresponding to the bottom portion of the storage bag is provided in the width direction at intervals s. The first coating device 24 is provided with adhesive 13a via solenoid valves 26 above the conveying lines on both sides of the lower paper material 19, respectively.
A glue application nozzle 27 is provided which can set the application timing. Further, the second coating device 25 is driven to rotate intermittently at a predetermined timing, and the linear protrusions 2 along the axial direction are formed on the outer circumference.
The adhesive 13a is transferred from the adhesive tank to the convex portion 28 through a transfer roller (both not shown) and applied to the lower paper material 19. The glue 13a is selected from pressure-sensitive adhesives, heat-sensitive adhesives, and the like, in addition to adhesives in a normal state.

The top paper supply unit 14 is provided with a top paper material 3 shown in FIG.
0 is continuously supplied. The upper paper material 30 is formed with a feed hole 30a at the center in the width direction along the carrying direction.
The pitch of the feed holes 30a is set to the same pitch as the feed holes 19a provided in the lower paper material 19. On the back surface, predetermined items (in the case of a DP envelope, a customer name entry field, etc.) are printed for each unit bag interval s. The width of the top paper material 30 is the same as the product width t of the storage bag 4 shown in FIG. The top paper supply unit 14 includes a roll 32 around which the top paper material 30 is wound and driven to rotate by a drive motor 31, and based on a detection signal from a position detector (not shown) provided on the tension arm 33. The roll 32 is rotationally driven, and the lower paper material 30 is continuously fed to the transport line.

The joining portion 15 is arranged vertically and has a plurality of pressure-bonding roller pairs 34 along the conveying direction. The pressure roller pair 34 is rotationally driven by a drive source (not shown). And at this joint part 15, under the superposed state,
By passing the upper paper materials 19 and 30 between the pressure roller pair 34, the glue 13 applied to the lower paper material 19 at the gluing section 13
The upper paper material 30 is joined to the lower paper material 19 via a.

The cutting section 16 has a rotary drum cutter 35, and the lower and upper paper materials 19, which are integrated by the joining section 15,
30 is cut every unit bag interval s. 16a in the figure
Indicates a feed roller.

The discharging unit 17 has a discharging conveyor 36 that is driven to rotate, and stacks and stores the individual storage bags 4 divided by the cutting unit 16.

The transport unit 18 is provided at the lower center of the lower sheet material 19 along the transport line, and has a drive rotor 37 provided corresponding to the shaping unit 12 and a driven rotor 38 provided at the joint 15.
And an endless belt 39 wound between both rotating bodies.
Then, the feed pins 40 are attached to the endless belt 39 at the same pitch as the pitch of the feed holes 19a and 30a provided in the lower paper material 19 or the upper paper material 30 or an integer multiple pitch thereof (see FIG. 4). Therefore, this transport unit 18
The belt 4 with the feed pin 40 engaged with the feed holes 19a and 30a of the lower and upper paper materials 19 and 30, respectively.
By driving 0, both paper materials are continuously conveyed along the conveyance line.

Next, the operation of the above configuration will be described.
The lower paper material 19 shown in FIG. 2 is continuously supplied from the lower paper supply unit 11. At this time, the drive motor 2 for the roll 21
0 is drive-controlled based on the movement of the tension arm 22 detected by a position detector (not shown). Further, the lower paper material 19 fed out from the roll 21 is conveyed in the downstream direction in a state in which the feed hole 19 a provided in the lower paper material 19 is engaged with the feed pin 40 of the belt 39 which constitutes the conveying portion 18.

The lower paper material 19 conveyed in this manner
As shown in FIG. 5, the sheet is first shaped by the shaping machine 23 of the shaping unit 12, and both sides in the transport direction are bent and shaped in a V shape. And the lower paper material 19 after shaping
Is further conveyed in a state where the feed hole 19a is engaged with the feed pin 40 of the belt 39 and reaches the gluing section 13, where gluing is performed as follows (see FIG. 4). First, a pair of glue application nozzles 27 included in the first application device 24.
Thus, the glue 13a is linearly applied to both side portions along the transport direction. Then, the coating roller 29 of the second coating device 25
Since the linear convex portions 28 of the lower sheet material 19 intermittently contact the lower sheet material 19, with respect to the width direction of the lower sheet material 19,
The glue 13a is applied for each unit bag interval s. At the intersection of the glue application line of the application roller 29 and the glue application line of the glue application nozzle 27, the glue application nozzle 27
The glue application is interrupted by the operation of the solenoid valve 26.

The upper paper material 30 supplied from the upper paper supply unit 14 is bonded to the lower paper material 19 thus coated with the adhesive 13a at the bonding portion 15. The top paper material 30 shown in FIG. 3 is continuously supplied from the top paper supply unit 14.
At this time, the drive motor 31 of the roll 32 is drive-controlled based on the movement of the tension arm 33 detected by a position detector (not shown). Further, the upper paper material 30 fed out from the roll 32 is superposed in a state of being aligned with the lower paper material 19 which constitutes the unit bag 4, and is pressure-bonded by the pressure roller pair 34 included in the joint portion 15. , And is integrated through the glue 13a applied to the lower paper material 19. From the stage where the upper paper material 30 fed from the roll 32 is superposed on the lower paper material 19, the feed hole 30a of the upper paper material 30 is brought into engagement with the feed pin 40 of the belt 39.

The lower paper materials 19 and 30 integrated at the joining portion 15 are conveyed to the downstream side while being nipped by the feed rollers 16a of the cutting portion 16 thereafter. Then, the rotary drum cutter 35 included in the cutting unit 16 cuts in the width direction for each unit bag interval s. Then, the individual storage bags 4 are moved by the discharge conveyor 36,
The final end is stacked and stored.

According to the above-mentioned embodiment, the lower and upper paper materials 1
Feed holes 19a and 30a are provided in the central portions of the width direction 9 and 30 along the carrying direction, respectively, and the carrying is performed under the condition that the feed pin 40 is engaged with the sending holes 19a and 30a. The materials 19 and 30 can be stably and reliably transported. Further, when both sides of the lower paper material 19 in the transport direction are bent and shaped in a V shape, the position line of the feed hole 19a before and after shaping does not change. Therefore, when the lower paper material 19 is conveyed by using the feed pin 40 of the endless belt 39 provided along the conveyance line, the width adjustment work which has been conventionally required is unnecessary, and the adjustment work time can be significantly shortened. it can.

In the above embodiment, both sides of the lower paper material 19 in the conveying direction are continuously bent and shaped into a V shape, but as shown in FIG. 6, both sides are folded back inward. It may be the one that has been done.

In the above-described embodiment, an example in which the storage bags shown in FIG. 12 are manufactured one by one has been described. Next, as a second embodiment, an example in which two storage bags are manufactured at a time will be described. explain. 7 is a plan view of the lower paper material used here, FIG. 8 is a plan view of the same upper paper material, and FIG. 9 is a state change diagram of the material. First, in FIG. 7, the width dimension n of the lower paper material 50
Is the dimension m of the cut-off margin portion 51 provided at the center of the width.
In addition, a size corresponding to twice the developed width of the lower paper 6 of the storage bag 4 shown in FIG. 12 is added, and the lower paper material 50 is conveyed to the central portion in the width direction so as to be located at the cutout portion 51. A feed hole 50a is formed along the direction. Also in this embodiment, punching holes 50b similar to the punching holes 19b shown in FIG. 2 are formed at unit bag intervals (intervals s shown in FIG. 12) along the conveyance direction of the lower paper material 50.

On the other hand, the top paper material 52 shown in FIG.
A feed hole 52a is formed in the widthwise central portion along the carrying direction.
Is formed. The width of the upper paper material 52 corresponds to twice the product width t of the storage bag 4 shown in FIG.
Is added with the same dimension as the dimension m of the cut-off margin portion 51 of.

The lower and upper paper materials 50 and 5 in this example
The supply of 2 is performed from the rolls as in the first embodiment, but the parts corresponding to the shaping unit 12 and the cutting unit 16 in the first embodiment are different as follows. First, as for the shaping section, as shown in FIG. 9, both side portions of the lower paper material 50 in the transport direction are bent and shaped into a V shape, and the center portion in the width direction is bent and shaped into an inverted concave shape. The shaping of the central portion in the width direction is performed symmetrically with the cutout portion 51 as the center. As for the cutting portion, as shown in FIG. 9, a cutter 53 for cutting and separating the cut-off margin portion 51 is added. This cutter 53
Is composed of a pair of upper and lower thin-blade-shaped slice cutters which are arranged along the conveyance line of the lower and upper paper materials 50 and 52 and are separated from each other by the dimension m of the cutting margin portion 51. The other lower paper supply unit, gluing unit, upper paper supply unit, joining unit, discharge unit, and conveyance unit are substantially the same as those shown in the first embodiment, and therefore description thereof is omitted. .

Next, the operation of this second embodiment will be described. First, the lower paper material 50 supplied from the lower paper supply section.
Is transported with its feed hole 50a engaged with the feed pin 40 as in the first embodiment, and is fed to the shaping unit. Here, as shown in FIG. 9, the lower paper material 50 is bent and shaped in a V-shape on both sides in the transport direction, and is symmetrically reversed about the cutout portion 51 in the width center portion. It is bent and shaped into a concave shape. The lower paper material 50 shaped in this way is fed into the feed hole 50a with the feed pin 4
When 0 is engaged, it is conveyed to the gluing section, and here, the glue 13a is applied at unit bag intervals on both sides and the width direction along the conveying direction. The lower paper material 50 coated with the glue 13a reaches the joint portion, and the upper paper material 52 supplied from the upper paper supply portion is joined thereto via the adhesive 13a.
The lower and upper paper materials 50 and 52 are integrated. The integrated lower and upper paper materials 50 and 52 are then cut and separated by a cutting unit. In this separation, first, the rotary drum cutter 35 cuts the sheet in the width direction to form a sheet, and then the cutter 53 cuts the cut-off margin portion 51 along the conveying direction, whereby two unit storages are made. The bag 4 is formed separately.
After that, it moves along the discharge conveyor and is stacked and stored in a parallel state at the final end thereof. In the storage bag manufactured according to the first embodiment, the feed hole 19a remains on the center line of the storage bag, and the range of use is limited. However, in the second embodiment, this is not the case. .

By the way, the lower sheet material 1 shown in FIG. 2 and FIG.
9 and 50, in the application area of the glue 13a by the second application device 25 of the gluing part 13, that is, the lower paper material 1
In the glue application area of the width direction 9 and 50 and in the portion to be bent and shaped in a V shape, two bonding holes 54 are provided so that the bending line is symmetrical. this is,
It is provided for the purpose of improving the adhesion of the bottom portion 4a of the storage bag 4. That is, when the bonding hole 54 is not provided, as shown in FIG. 10A, unbonded parts a are generated at both end parts of the bottom part 4a. On the other hand, when the bonding hole 54 is provided, as shown in FIG. 10B, the glue 13a applied by the second applying device 25 is also applied to the portion a through the hole 54. It is applied, and this portion is also joined to the top paper material 30 (52), and thus the degree of adhesion of the bottom portion 4a of the storage bag 4 can be improved.

In the above two embodiments,
In addition to providing the feed holes 19a (50a) and 30a (52a) in the central portions of the upper paper materials 19 (50) and 30 (52), cutout portions are provided at both widthwise end portions, and conveyance is also performed to these portions. It is also possible to provide feed holes along the direction and use both feed holes in combination for conveyance. In the embodiment, the endless belt 39 including the feed pin 40 is used as the transport unit.
A plurality of feed wheels having feed pins may be provided along the transport direction. Further, the feed holes may not be specially provided in both paper materials, and the paper may be conveyed in a state in which the width direction central portion is sandwiched by the mere feed rollers.

In the embodiment, the upper sheet material and the lower sheet material are made of paper materials, but other materials such as plastic materials may be used. When a plastic material is used, the glued portion is not always necessary, and a joining method by welding can be used.

[0029]

According to the present invention, it is possible to shorten the adjustment time of the feeding portion.

[Brief description of drawings]

FIG. 1 is a schematic view of a bag manufacturing apparatus according to a first embodiment of the present invention.

FIG. 2 is a plan view of a lower paper material used in FIG.

FIG. 3 is a plan view of an upper paper material used in FIG.

FIG. 4 is a schematic diagram of a gluing portion used in FIG.

FIG. 5 is a state change diagram of the material in FIG.

FIG. 6 is a cross-sectional view showing a modified example of shaping the lower paper material.

FIG. 7 is a plan view of a lower paper material that is a second embodiment to which the present invention is applied.

FIG. 8 is a plan view of a top paper material that is a second embodiment to which the present invention is applied.

FIG. 9 is a state change diagram of a material in the second embodiment to which the present invention is applied.

FIG. 10 is a cross-sectional view of the storage bag in a glued state.

FIG. 11 is a perspective view of a conventional storage bag.

FIG. 12 is a perspective view of an example of a storage bag manufactured by applying the present invention.

FIG. 13 is an explanatory diagram showing a conventional defect.

[Explanation of symbols]

 4 Storage Bag 4a Bottom 5 Upper Paper 6 Lower Paper 7 "Curve" 10 Bag Manufacturing Equipment 11 Lower Paper Supplying Section 12 Lower Paper Supplying Section 13 Gluing Section 14 Upper Paper Supplying Section 15 Joining Section 16 Cutting Section 17 Discharging Section 18 Conveying Part 19 Lower paper material 19a Feed hole 23 Shaping machine 24 First coating device 25 Second coating device 30 Upper paper material 30a Feed hole 36 Discharge conveyor 37 Drive rotor 38 Driven rotor 39 Endless belt 40 Feed pin 50 Bottom paper Material 50a Feed hole 51 Cutout area 52 Paper material 52a Feed hole 54 Adhesive hole

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadashi Kawai 2-1, Shimomiyahi-cho, Shinjuku-ku, Tokyo Kawase Computer Supply Co., Ltd. Tokyo head office

Claims (3)

[Claims] 1. A bag manufacturing method for manufacturing a bag by transporting an upper sheet material and a lower sheet material in a continuous manner, and stacking and joining both sheet materials to manufacture a bag. A method for manufacturing a bag, wherein the bag is conveyed with the center portion in the width direction as a reference. 2. A bag manufacturing method for manufacturing a bag by conveying an upper sheet material and a lower sheet material in a continuous manner and stacking and joining the both sheet materials, wherein the upper sheet material and the lower sheet material. A method of manufacturing a bag, characterized in that a feed roller is provided so as to face the center portion in the width direction, and the upper sheet material and the lower sheet material are conveyed by using the feed roller with the center portion in the width direction as a reference. 3. A bag manufacturing method for manufacturing a bag by conveying an upper sheet material and a lower sheet material in a continuous manner, and stacking and joining the both sheet materials, wherein the upper sheet material and the lower sheet material. A feed hole is provided in each of the widthwise central portions, and the upper sheet material and the lower sheet material are conveyed with the widthwise central portion as a reference in a state where the feed pins are engaged with the feed holes. Bag manufacturing method.