JPH0362143B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for manufacturing small bags such as chopstick bags and stationery bags for ballpoint pens and the like.

(Prior art) To manufacture conventional sachets such as chopstick bags, a sheet-fed printing machine prints on the surface of sheets of paper that have already been cut, and then several sheets of this printed paper are stacked together. , make a triangular cut or a semicircular cut on the edge of the side that will become the bag opening, then put these sheets one by one into a gluing and folding machine and glue them at intervals of the pouch width, and fold them in half in the width direction. A pouch was formed, and after the glue had dried, it was cut in the middle of the glued part to produce a pouch.

However, in this conventional method, most of the steps involved, such as stacking the printed sheets manually, cutting the bag opening with a press, and then manually putting the sheets one by one into a gluing and folding machine and folding them into two. However, because it relied on manual labor, it was inefficient, and labor-saving measures were desired.

(Problems to be Solved by the Invention) The conventional manufacturing of small bags such as chopstick bags used to be inefficient due to the large number of workers involved. The present invention aims to provide a method for manufacturing sachets that can save labor.

(Means for Solving the Problems) For this reason, the present invention feeds a roll of paper with or without printing on one side from a paper feeding device to a gluing device, In this case, printing is applied to the surface before entering the gluing device, and in the gluing device, on the opposite side to the printed surface, a length corresponding to the length of the pouch in the length direction of the pouch, which is the traveling direction of the paper, is printed. Glue is applied to a narrow strip in parallel in the direction of travel at intervals of the width of the pouch, and then the rear edge in the direction of travel of a portion corresponding to twice the length of the pouch including the glue-applied surface. At the same time as the bag opening is cut, the front edge of the following web is cut in a straight line and separated from the following web to form a sheet twice the length of the sachet, and this sheet is inserted into the cut section. Next, in a folding machine, the paper is folded in half at right angles to the direction of travel to form a pasted paper in which a plurality of pouches are formed in parallel in the width direction, and then this pasted paper is cut in the length direction at the center of the glued part. This is a means to solve problems.

(Function) A length corresponding to the length of the pouch, which is the traveling direction of the non-printed surface that becomes the inner surface of the pouch, of the rolled paper that is continuously fed from the paper feeding device, and at a pouch width interval, and Glue is applied to a narrow strip in parallel in multiple strips in the direction of travel, and then the rear edge of a portion corresponding to twice the length of the pouch in the direction of travel is cut into the shape of a bag opening to form a bag opening. 2 of the bag length
Separately cut the paper from the downstream roll paper at double the length at right angles to the direction of travel to form a sheet, feed this sheet to a folding machine on a conveyor, and cut the sheet at right angles to the direction of travel. The paper is folded in half at the center to form a plurality of pouches continuous in the width direction, and the pasted paper is cut in the longitudinal direction at the center of the glued part to produce the pouches.

(Embodiment) The present invention will be described below with reference to the embodiments shown in the drawings. Figure 1 shows an embodiment of the small bag making machine of the present invention, and Figure 2 shows a sheet formed by gluing and cutting the rear end into triangles. The back view of the leaf and FIG. 3 are plan views showing the adhesive paper obtained by folding the paper shown in FIG. 2 in half.

Now, in Fig. 1, 1 is the paper feeder, 2 is the first
2a is a second color rotary printing press, 3 is a turning device, 4 is a gluing and die roll device, and 5 is a folding machine. The paper feeding device 1 feeds a rolled paper 7 wound around a roll 6 or 6a, and when the rolled paper 7 wound around the roll 6 runs out, it switches to the roll 6a and feeds the rolled paper, but during this time it continues to feed the rolled paper at a constant speed. A device 8 for stocking paper is provided so that the web 7 can be fed at the same time.

That is, when the rolled paper 7 that has been fed from the roll 6 of the paper feeder 1 is running low on the roll 6, the rotation of the roll 6 of the paper feeder 1 is stopped by the drive device 22, and the roll 6 is stopped. The end of the paper of the roll 6a and the beginning of the paper of the roll 6a are connected with double-sided adhesive tape. This splicing can be done manually or automatically, and such splicing devices are conventionally known.

By the way, even if the paper feeding of the roll 6 is stopped, bag making must continue, so a device 8 for stocking paper is provided so that the flow of paper does not stop. This device 8 is provided with a plurality of rolls 23 and 24 that sequentially wind the paper in a staggered manner up and down. When the paper feed from the roll 6 is stopped and the paper roll 7 is pulled by the next device due to tension, the frame on which the roll 23 is mounted descends according to the tension of the paper, and the paper flow is stopped. It is now possible to avoid any shortages. Note that this paper storage device is also conventionally known.

Also, downstream of this device 8 is a first color rotary printing machine 2.
In order to feed the paper without horizontal deviation, an edge guide infeed 9 is provided that detects the edge of the paper and regulates the width of the paper. This edge guide infeed 9 is also conventionally known, but to briefly explain it, it is used to prevent the paper from meandering, and when one side edge of the paper touches a sensor, a command from the sensor is sent. This tilts the roll around which the paper is wound so as to move the paper to the center of the roll, thereby preventing the paper from meandering.

The roll paper 7 that has come out of the edge guide infeed 9 is printed with the first color on the upper surface of FIG. 1 by the first color rotary printing machine 2 as shown in A in FIG.
It is dried in a dryer 10 using a curing irradiator, and then printed in a second color rotary printing machine 2a as shown in B in FIG. dried. Next, the surface of the paper roll 7a opposite to the printed surface on which the printings A and B have been applied is glued by the gluing device 12 of the gluing/die roll device 4 that follows. Since the printed surface is the upper surface of the web 7 in FIG. 1, the printed web 7a must be turned over before entering the device 4.

For this purpose, a turning device 3 is disposed between the second color rotary printing press 2a and the gluing/die roll device 4. This turning device 3 turns over the web 7a using a turn bar 11, which is a conventionally known turn bar. That is, although the turn bar 11 is shown as two rolls in parallel in FIG. 1, this is a schematic diagram, and the web 7a is fed into the turn bar 11 with the printed surface facing upward. Then, it is bent by 45 degrees in the turn bar 11 and sent in the right angle direction, then immediately reversed by rollers and returned to the upper side of the original position, and then bent again by 45 degrees, this time with the back side facing up and glued and die roll device 4 sent to. The above-mentioned operation is a conventionally well-known method for reversing paper, textiles, etc.

Next, in the gluing/die roll device 4, at the entrance, first, the gluing device 12 uses a roll method (gluing roll 13' having grooves at the width of a pouch) or a nozzle method.
On the back side opposite to the printed surfaces A and B, roll paper 7
Glue 13 is applied to a length corresponding to the length of the pouch in the longitudinal direction of the pouch, which is the traveling direction of a, in a thin strip at intervals between the pouches and in parallel in a plurality of strips in the traveling direction. Then, at the same time as die cutting (triangular cutting C of the bag opening or other semicircular cutting, etc.), a straight line cutting of the leading edge of the subsequent web 7a is performed by the die cutting roll 14 and the die cutting anvil roll 15. That is, on the front half D, which has been turned over as described above with respect to the traveling direction of the paper web 7a, a plurality of parallel strips are formed consecutively in the width direction of the paper at intervals S corresponding to the width of the pouch E, and facing the traveling direction. Glue 13 is applied to the cloth as shown in FIG. Note that this glue may be applied to the rear half F. Next, the trailing edge G of the rear half surface F in the traveling direction is cut by the cutting edge of the die-cutting roll 14 protruding from the roll surface of the paper web 7a fed between the roll 14 and the die-cutting anvil roll 15. Then, the sheet 16 is formed by separating and cutting the sheet 16 from the subsequent web at a right angle to the traveling direction at a length L twice the bag length l.

This sheet 16 is sent by a conveyor 17 to a conventionally known folding machine 5 and folded in half along the line from the center of FIG. A roll 19 (having a plurality of grooves for escaping a certain portion of the glue 13) rolls the sheet 16 onto the web 7a before being cut.
It is sent onto the conveyor 17 via the separator 18 at a faster speed than the above. Next, the folding machine 5 is fed into a folding machine 5, which is also conventionally known and has a stopper against which the leading edge of the sheet 16 collides, and the movement of the leading edge of the sheet 16 is stopped by the stopper. It starts to sag at the entrance of the folding machine, and this sagging part is caught by the rollers and folded in half, and at the same time, both sides F and D overlap and are glued with glue 13, forming a pouch E continuously in the width direction. be done. Next, the pasted paper J as shown in Fig. 3 is transferred to the conveyor 20.
It is then sent to the next step and cut along the cutting line 21 at the center of the glue 13 portion shown in FIG. 3 to obtain individual pouches E. In addition, although the above embodiment shows the case where the first color and the second color are printed on the top surface of the web using a rotary printing press, gravure printing may also be performed, and in this case, printing is performed from the bottom surface of the web. , there is no need to provide a subsequent turning device. It is also possible to not place a printing machine in the line and instead set a printed take-up roll that has been printed elsewhere on the paper feeder from the beginning.

(Effects of the Invention) As explained in detail above, according to the present invention, small bags such as chopstick bags, which conventionally required a lot of manpower, can be automatically and continuously formed from a roll of paper, and do not require any manpower at all. Because it can be manufactured with high efficiency,
The manufacturing cost of sachets can be significantly reduced.

[Brief explanation of drawings]

Fig. 1 is a side view of a small bag making machine showing an embodiment of the present invention, Fig. 2 is a plan view showing the state in which glue is applied to the inner surface of cut sheets, and Fig. 3 is the same as Fig. 2. FIG. 3 is a plan view of the adhesive paper folded in half. Explanation of the main parts of the diagram, 1...Paper feeding device, 2, 2
a... Rotary printing press, 3... Reversing device, 4... Gluing/die roll device, 5... Folding machine, 6... Roll, 7... Roll paper, 10... Dryer, 11
...Turn van, 12...Gluing device, 13...
Glue, 14...Die-cut roll, 15...Die-cut anvil roll, 16...Sheet paper, 17...
Conveyor, A... Printing, C... Triangular cutting, D...
Front half, E...Small bag, F...Rear half, H...
Bag opening, ~... center, J... pasting paper.

Claims (1)

[Claims] 1. A roll of paper with or without printing on one side is fed from a paper feeding device to a gluing device, and if no printing is applied, printing is applied to the surface before entering the gluing device, In the gluing device, on the surface opposite to the printing surface, a plurality of parallel strips are formed in a length corresponding to the length of the pouch in the length direction of the pouch, which is the direction in which the paper travels, at intervals of the pouch width and in the direction of travel. Then, the rear edge in the direction of travel of a portion corresponding to twice the length of the pouch including the glue-applied surface is cut at the bag opening, and at the same time, the front edge of the subsequent web is cut in a straight line. The sheet is cut and separated from the subsequent web to form a sheet with a length twice the length of the sachet, and this sheet is folded in half at right angles to the direction of travel in a folding machine following the cutting section to form a plurality of sheets. 1. A method for manufacturing a pouch, which comprises forming a pasted paper in which pouches are formed in parallel in the width direction, and then cutting the pasted paper in the length direction at the center of the glued part.